首页 > 最新文献

VIETNAM JOURNAL OF EARTH SCIENCES最新文献

英文 中文
Determination of actual characteristic curve of main ventilation fan at Quang Ninh underground coal mines using field measurement method 广宁地下煤矿主通风机实际特性曲线的现场测量测定
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-11-30 DOI: 10.15625/2615-9783/16761
Dao Van Chi, Dung Le Tien, Xuan Ha Tran
Determining a proper operation mode of the main ventilation fan at an underground coal mine primarily uses the theoretical characteristic curves of the fan’s manufacturer. Because these curves are developed in laboratory-standard conditions, the characteristic curves under different conditions in practice significantly change, seriously impacting the ventilation efficiency and environmental safety of mine. This paper presents a determination of the main fan's actual characteristic curve using a field measurement method. The method involves the (i) simultaneous measurement of airflow and air pressure at designated locations in fan drift and ventilation crosscut and (ii) statistical analysis and interpolation of the measured data. The results show that the fan actual pressure curve is permanently displaced to the left and steeper than the corresponding theoretical pressure curve in an on-site operating mode. The finding points out that on-site fans operate in overload mode that can quickly damage their mechanical components. This method provides mining engineers with an easy-to-apply tool for proper adjustment of the operation mode. This improves ventilation efficiency, increases environmental safety, and reduces the underground coal mine operational costs.
确定煤矿井下主通风机的合理运行方式,主要是利用风机生产厂家的理论特性曲线。由于这些曲线是在实验室标准条件下制定的,实际不同条件下的特征曲线变化较大,严重影响了矿井的通风效率和环境安全。本文介绍了用现场测量法确定主风机实际特性曲线的方法。该方法包括(i)在风扇流道和通风横切处的指定位置同时测量气流和气压,以及(ii)对测量数据进行统计分析和插值。结果表明:在现场工况下,风机实际压力曲线永久向左偏移,且比相应的理论压力曲线更陡;该发现指出,现场风机在超负荷模式下运行,可能会迅速损坏其机械部件。该方法为采矿工程师合理调整作业模式提供了一种易于使用的工具。这提高了通风效率,增加了环境安全,降低了煤矿井下运行成本。
{"title":"Determination of actual characteristic curve of main ventilation fan at Quang Ninh underground coal mines using field measurement method","authors":"Dao Van Chi, Dung Le Tien, Xuan Ha Tran","doi":"10.15625/2615-9783/16761","DOIUrl":"https://doi.org/10.15625/2615-9783/16761","url":null,"abstract":"Determining a proper operation mode of the main ventilation fan at an underground coal mine primarily uses the theoretical characteristic curves of the fan’s manufacturer. Because these curves are developed in laboratory-standard conditions, the characteristic curves under different conditions in practice significantly change, seriously impacting the ventilation efficiency and environmental safety of mine. This paper presents a determination of the main fan's actual characteristic curve using a field measurement method. The method involves the (i) simultaneous measurement of airflow and air pressure at designated locations in fan drift and ventilation crosscut and (ii) statistical analysis and interpolation of the measured data. The results show that the fan actual pressure curve is permanently displaced to the left and steeper than the corresponding theoretical pressure curve in an on-site operating mode. The finding points out that on-site fans operate in overload mode that can quickly damage their mechanical components. This method provides mining engineers with an easy-to-apply tool for proper adjustment of the operation mode. This improves ventilation efficiency, increases environmental safety, and reduces the underground coal mine operational costs.","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42075737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Flood susceptibility modeling using Radial Basis Function Classifier and Fisher’s linear discriminant function 基于径向基函数分类器和Fisher线性判别函数的洪水敏感性建模
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-10-12 DOI: 10.15625/2615-9783/16626
Chinh Luu, Duc Dam Nguyen, M. Amiri, Phong Tran Van, Quynh Duy Bui, Indra Prakash, Binh Thai Pham
Floods are among the most frequent highly disastrous hazards affecting life, property, and the environment worldwide. While various models are available to predict flood susceptibility, no model is accurate enough to be used for all flood-prone areas. Model development using different algorithms is a continuous process to improve the prediction accuracy of flood susceptibility. In the study, we used the Radial Basis Function and Fisher’s linear discriminant function to develop a flood susceptibility map for a case study of Quang Binh Province. The model development used ten variables (elevation, slope, curvature, river density, distance from river, geomorphology, land use, flow accumulation, flow direction, and rainfall). For model training and validation, input data was split into a 70:30 ratio according to flood locations. Statistical indexes were used to evaluate model performance such as Receiver Operating Characteristic, the Area Under the ROC Curve, Root Mean Square Error, Accuracy, Sensitivity, Specificity, and Kappa index. Results indicated that the radial basis function classifier model had better performance in predicting flood susceptible areas based on the statistical measures (PPV = 92.00%, NPV = 87.00%, SST = 87.62%, SPF = 91.58%, ACC = 89.50%, Kappa = 0.790, MAE = 0.204, RMSE = 0.292 and AUC = 0.957. Therefore, the radial basis function classifier algorithm model is appropriate for predicting flood susceptibility in Quang Binh Province.
洪水是影响世界范围内生命、财产和环境的最常见的严重灾害之一。虽然有各种模型可用于预测洪水易感性,但没有一个模型足够精确,可以用于所有洪水易发地区。采用不同算法开发模型是一个不断提高洪水敏感性预测精度的过程。本文以广平省为例,利用径向基函数和Fisher线性判别函数建立了洪水敏感性图。模型的开发使用了10个变量(高程、坡度、曲率、河流密度、与河流的距离、地貌、土地利用、流量积累、流向和降雨量)。在模型训练和验证中,输入数据根据洪水位置分成70:30的比例。采用统计指标评价模型的性能,如受试者工作特征、ROC曲线下面积、均方根误差、准确性、敏感性、特异性和Kappa指数。结果表明,基于统计度量的径向基函数分类器模型(PPV = 92.00%, NPV = 87.00%, SST = 87.62%, SPF = 91.58%, ACC = 89.50%, Kappa = 0.790, MAE = 0.204, RMSE = 0.292, AUC = 0.957)对洪水易感区有较好的预测效果。因此,径向基函数分类器算法模型适合于平省洪水易感性预测。
{"title":"Flood susceptibility modeling using Radial Basis Function Classifier and Fisher’s linear discriminant function","authors":"Chinh Luu, Duc Dam Nguyen, M. Amiri, Phong Tran Van, Quynh Duy Bui, Indra Prakash, Binh Thai Pham","doi":"10.15625/2615-9783/16626","DOIUrl":"https://doi.org/10.15625/2615-9783/16626","url":null,"abstract":"Floods are among the most frequent highly disastrous hazards affecting life, property, and the environment worldwide. While various models are available to predict flood susceptibility, no model is accurate enough to be used for all flood-prone areas. Model development using different algorithms is a continuous process to improve the prediction accuracy of flood susceptibility. In the study, we used the Radial Basis Function and Fisher’s linear discriminant function to develop a flood susceptibility map for a case study of Quang Binh Province. The model development used ten variables (elevation, slope, curvature, river density, distance from river, geomorphology, land use, flow accumulation, flow direction, and rainfall). For model training and validation, input data was split into a 70:30 ratio according to flood locations. Statistical indexes were used to evaluate model performance such as Receiver Operating Characteristic, the Area Under the ROC Curve, Root Mean Square Error, Accuracy, Sensitivity, Specificity, and Kappa index. Results indicated that the radial basis function classifier model had better performance in predicting flood susceptible areas based on the statistical measures (PPV = 92.00%, NPV = 87.00%, SST = 87.62%, SPF = 91.58%, ACC = 89.50%, Kappa = 0.790, MAE = 0.204, RMSE = 0.292 and AUC = 0.957. Therefore, the radial basis function classifier algorithm model is appropriate for predicting flood susceptibility in Quang Binh Province.","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46274568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Evaluation of the Global Satellite Mapping of Precipitation (GSMaP) data on sub-daily rainfall patterns in Vietnam 全球卫星降水测绘(GSMaP)数据对越南亚日降雨模式的评估
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-10-02 DOI: 10.15625/2615-9783/16594
Hoa Pham, J. Matsumoto, M. I. Nodzu
This study aims to evaluate the performance of Global Satellite Mapping of Precipitation (GSMaP) data in observing the sub-daily rainfall patterns in Vietnam using synoptic gauge measurements considering seasonal variations in rainfall. Differences in the estimations of the three GSMaP products, including the standard version 7 (MVKv7) and two gauge-calibrated versions 6 and 7 (GAUv6 and GAUv7), were clarified based on rainfall characteristic parameters and statistical indices. The present study clarified that the contribution of sub-daily rainfall in Vietnam was higher during the afternoon than at other times, predominantly in the Central Highlands and Southern Plain, while it occurred most often during the evening to early morning in northern regions. Distinct regional features were also identified along the central coast. Most of the summer afternoon maximum fell in the western mountainous area, while the eastern coastal plain experienced an insignificant amount of rainfall. As rainfall characteristics varied with seasons and regions, the performance of GSMaP demonstrated this variation quite well compared to in-situ observations. However, GSMaP still exhibited high biases in rainy season and topographically heterogeneous areas, especially in the northern regions where sub-daily rainfall cycles had large variations. The standard GSMaP (MVK) product illustrated an afternoon peak better than the gauge-calibrated (GAU) product, which suggests that utilizing the MVK in the Central Highlands and Southern Plain and the GAU over central coastal regions would be appropriate when considering the characteristics of sub-daily precipitation.
本研究旨在评估全球卫星降水测绘(GSMaP)数据在使用天气计测量(考虑降雨量的季节变化)观测越南亚日降雨模式方面的性能。根据降雨特征参数和统计指数,澄清了三种GSMaP产品的估计差异,包括标准版本7(MVKv7)和两种仪表校准版本6和7(GAUv6和GAUv7)。目前的研究表明,越南的亚日降雨量在下午的贡献高于其他时间,主要发生在中部高地和南部平原,而在北部地区最常见的是在晚上到凌晨。中部海岸也发现了明显的区域特征。夏季下午的最大降雨量大部分落在西部山区,而东部沿海平原降雨量不多。由于降雨特征随季节和地区而变化,与现场观测相比,GSMaP的性能很好地证明了这种变化。然而,GSMaP在雨季和地形不均匀地区仍然表现出较高的偏差,尤其是在亚日降雨周期变化较大的北部地区。标准GSMaP(MVK)产品比标准校准(GAU)产品更好地显示了下午的峰值,这表明在考虑亚日降水的特征时,在中部高地和南部平原使用MVK和在中部沿海地区使用GAU是合适的。
{"title":"Evaluation of the Global Satellite Mapping of Precipitation (GSMaP) data on sub-daily rainfall patterns in Vietnam","authors":"Hoa Pham, J. Matsumoto, M. I. Nodzu","doi":"10.15625/2615-9783/16594","DOIUrl":"https://doi.org/10.15625/2615-9783/16594","url":null,"abstract":"This study aims to evaluate the performance of Global Satellite Mapping of Precipitation (GSMaP) data in observing the sub-daily rainfall patterns in Vietnam using synoptic gauge measurements considering seasonal variations in rainfall. Differences in the estimations of the three GSMaP products, including the standard version 7 (MVKv7) and two gauge-calibrated versions 6 and 7 (GAUv6 and GAUv7), were clarified based on rainfall characteristic parameters and statistical indices. The present study clarified that the contribution of sub-daily rainfall in Vietnam was higher during the afternoon than at other times, predominantly in the Central Highlands and Southern Plain, while it occurred most often during the evening to early morning in northern regions. Distinct regional features were also identified along the central coast. Most of the summer afternoon maximum fell in the western mountainous area, while the eastern coastal plain experienced an insignificant amount of rainfall. As rainfall characteristics varied with seasons and regions, the performance of GSMaP demonstrated this variation quite well compared to in-situ observations. However, GSMaP still exhibited high biases in rainy season and topographically heterogeneous areas, especially in the northern regions where sub-daily rainfall cycles had large variations. The standard GSMaP (MVK) product illustrated an afternoon peak better than the gauge-calibrated (GAU) product, which suggests that utilizing the MVK in the Central Highlands and Southern Plain and the GAU over central coastal regions would be appropriate when considering the characteristics of sub-daily precipitation.","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49397465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Assessment and reduction of zenith path delay biases due to day boundary effect 天边界效应引起的天顶路径延迟偏差的评估和减少
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-09-30 DOI: 10.15625/2615-9783/16587
Lau Nguyen Ngoc, R. Coleman
The troposphere consists of dry air and water vapor, delaying the GNSS signal by about 2.4 m in the zenith direction. The water vapor only causes an error of about 0.2 m in distance measurement, but it is challenging to model and overcome. From 2003 the International GNSS Service (IGS) started to provide the new product of zenith path delay (ZPD) with an accuracy of 1.5-5 mm. However, we found an error in these products up to 30 mm at epochs between 2 days due to the day boundary effect and an average of 16mm RMS for nine days. Our research shows that for reducing the impact, the most critical factor is selecting the initial value for the ZPD, followed by satellite orbit/clock and, finally, the station coordinate values. By choosing an appropriate initial value for ZPD and employing a 3 days orbit/clock, the ZPD error due to the day boundary effect can be reduced to negligible. Meanwhile, the change in the station coordinate value in cm level does not impact the effect.
对流层由干燥空气和水蒸气组成,使GNSS信号在天顶方向延迟约2.4米。在距离测量中,水蒸气只会造成约0.2 m的误差,但建模和克服这一误差具有挑战性。从2003年开始,国际GNSS服务(IGS)开始提供精度为1.5- 5mm的天顶路径延迟(ZPD)新产品。然而,由于日边界效应,我们发现这些产品在2天之间的epoch误差高达30毫米,9天的平均RMS为16毫米。研究表明,为了减小影响,最关键的因素是选择ZPD的初始值,其次是卫星轨道/时钟,最后是站座标值。通过选择合适的ZPD初始值和采用3天轨道/时钟,由于日边界效应引起的ZPD误差可以降低到可以忽略不计。同时,cm级站位坐标值的变化不影响效果。
{"title":"Assessment and reduction of zenith path delay biases due to day boundary effect","authors":"Lau Nguyen Ngoc, R. Coleman","doi":"10.15625/2615-9783/16587","DOIUrl":"https://doi.org/10.15625/2615-9783/16587","url":null,"abstract":"The troposphere consists of dry air and water vapor, delaying the GNSS signal by about 2.4 m in the zenith direction. The water vapor only causes an error of about 0.2 m in distance measurement, but it is challenging to model and overcome. From 2003 the International GNSS Service (IGS) started to provide the new product of zenith path delay (ZPD) with an accuracy of 1.5-5 mm. However, we found an error in these products up to 30 mm at epochs between 2 days due to the day boundary effect and an average of 16mm RMS for nine days. Our research shows that for reducing the impact, the most critical factor is selecting the initial value for the ZPD, followed by satellite orbit/clock and, finally, the station coordinate values. By choosing an appropriate initial value for ZPD and employing a 3 days orbit/clock, the ZPD error due to the day boundary effect can be reduced to negligible. Meanwhile, the change in the station coordinate value in cm level does not impact the effect.","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45320143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Geochemistry and mineralogy of the Truc Thon Clay, Hai Duong Province, North Vietnam: implication for paleoclimatic and provenance analysis 越南北部海阳省Truc Thon粘土的地球化学和矿物学:对古气候和物源分析的意义
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-09-22 DOI: 10.15625/2615-9783/16572
T. H. Van, S. Iqbal, Urszula Czarniecka, A. Wysocka, Pha Phan Dong, Cuong Nguyen Quoc, Ha Vu Van, Tuan Dang Minh
During the Miocene-Pleistocene, generally sub-tropical to tropical warm and humid paleoclimate prevailed in Southeast Asia with a gradual cooling trend. The Truc Thon clay (TTC) mine presents interesting outcrops for sedimentological and provenance analysis. The present study uses results of geological investigation in 16 outcrops and wells at the clay mine Truc Thon. The TTC has lens-shaped geometry, filled with two clay bodies, including grey-white clay and multicolor clay. Bulk mineralogy indicates the predominance of quartz and a relatively high amount of pyrophyllite. Clay mineralogy shows the presence of main kaolinite, followed by illite and mixed-layer illite-smectite. These may interpret a warm, humid paleoclimatic condition in the source areas. Illite may be inherited from basement rocks. The bulk rock geochemistry supports intense chemical weathering with the Chemical Index of Alteration (CIA) in the TTC ranged ca. 80.6-98 (average = 90.4). In combination with the geochemical proxies and the mineralogical composition of the TTC, the chemical weathering intensity indicated warm/hot, semi-humid/humid tropical paleoclimate in the source area. A combination of mineralogical and geochemical analyses with regional geological features show that the Hon Gai Triassic rocks are the main source for the TTC. Source materials are originally related to silicic rocks of granitic-granodioritic composition. Paleoclimatic conditions favored intense chemical weathering of the Hon Gai Triassic rocks and surrounding rocks, creating a ceramic mine of great industrial value.
中新世—更新世期间,东南亚地区普遍为亚热带—热带暖湿气候,气候逐渐变冷。Truc Thon粘土矿为沉积学和物源分析提供了有趣的露头。本研究利用了土矿Truc Thon 16个露头和井的地质调查结果。TTC具有透镜形状的几何形状,由两种粘土体填充,包括灰白色粘土和多色粘土。总体矿物学显示石英为主,叶蜡石含量较高。粘土矿学分析表明,高岭石为主,伊利石次之,伊利石-蒙脱石混合层。这些可能解释了源区温暖潮湿的古气候条件。伊利石可能来自基岩。整体岩石地球化学特征表明,TTC的化学蚀变指数(chemical Index of蚀变)在80.6 ~ 98之间,平均值为90.4。结合地球化学指标和TTC的矿物组成,化学风化强度反映了源区温暖/炎热、半湿润/湿润的热带古气候。矿物学和地球化学分析结合区域地质特征表明,红盖三叠系岩石是TTC的主要来源。源物质最初与花岗岩-花岗闪长岩组成的硅质岩有关。古气候条件有利于洪盖三叠纪岩石及其围岩强烈的化学风化作用,形成了一个极具工业价值的陶瓷矿。
{"title":"Geochemistry and mineralogy of the Truc Thon Clay, Hai Duong Province, North Vietnam: implication for paleoclimatic and provenance analysis","authors":"T. H. Van, S. Iqbal, Urszula Czarniecka, A. Wysocka, Pha Phan Dong, Cuong Nguyen Quoc, Ha Vu Van, Tuan Dang Minh","doi":"10.15625/2615-9783/16572","DOIUrl":"https://doi.org/10.15625/2615-9783/16572","url":null,"abstract":"During the Miocene-Pleistocene, generally sub-tropical to tropical warm and humid paleoclimate prevailed in Southeast Asia with a gradual cooling trend. The Truc Thon clay (TTC) mine presents interesting outcrops for sedimentological and provenance analysis. The present study uses results of geological investigation in 16 outcrops and wells at the clay mine Truc Thon. The TTC has lens-shaped geometry, filled with two clay bodies, including grey-white clay and multicolor clay. Bulk mineralogy indicates the predominance of quartz and a relatively high amount of pyrophyllite. Clay mineralogy shows the presence of main kaolinite, followed by illite and mixed-layer illite-smectite. These may interpret a warm, humid paleoclimatic condition in the source areas. Illite may be inherited from basement rocks. The bulk rock geochemistry supports intense chemical weathering with the Chemical Index of Alteration (CIA) in the TTC ranged ca. 80.6-98 (average = 90.4). In combination with the geochemical proxies and the mineralogical composition of the TTC, the chemical weathering intensity indicated warm/hot, semi-humid/humid tropical paleoclimate in the source area. A combination of mineralogical and geochemical analyses with regional geological features show that the Hon Gai Triassic rocks are the main source for the TTC. Source materials are originally related to silicic rocks of granitic-granodioritic composition. Paleoclimatic conditions favored intense chemical weathering of the Hon Gai Triassic rocks and surrounding rocks, creating a ceramic mine of great industrial value.","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48251008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Chemical, mineralogical, and physicochemical features of surface saline muds from Southwestern sub-basin of the East Vietnam Sea: Implication for new peloids 东越海西南亚盆地表层含盐泥浆的化学、矿物学和物理化学特征:对新类球粒的意义
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-09-17 DOI: 10.15625/2615-9783/16561
Luong Le Duc, H. Nguyen, R. Shinjo, Renat B. Shakirov, A. Obzhirov
This study presents the chemical, mineralogical and physicochemical features of 8 saline mud samples from 8 gravity cores located in the southwestern sub-basin of the East Vietnam Sea. The grain-size analysis of mud samples reveals the amount of clay and silt particles in the ranges of 65.1-89.2% and 9.5-34.2%, respectively and a very low fraction of sand. The analytical results showed that mud samples have high contents of SiO2 (32.79-48.09%), Al2O3 (11.26-13.63%), CaO (3.10-13.93%), Fe2O3 (4.15-9.45%), and low contents of TiO2, MnO, MgO, Na2O, K2O and P2O5. The XRD analysis of mud samples indicated mineral compositions with major minerals of quartz, illite, calcite, chlorite, feldspar, kaolinite, and other minor minerals like halite, smectite, fluorapatite, pyroxene, amphibole. The organic and physicochemical parameters of mud samples were also measured. Potentially toxic elements in mud samples were determined and compared with reference values and the technical standard. This study proposes that saline mud samples from the studied area are potential peloids.
本研究介绍了位于东越南海西南亚盆地的8个重力岩心中的8个盐水泥样品的化学、矿物学和物理化学特征。泥浆样品的粒度分析显示,粘土和淤泥颗粒的含量分别在65.1-89.2%和9.5-34.2%之间,沙子的含量非常低。分析结果表明,泥浆样品中SiO2(32.79-48.09%)、Al2O3(11.26-13.63%)、CaO(3.10-13.93%)、Fe2O3(4.15-9.45%)含量较高,TiO2、MnO、MgO、Na2O、K2O和P2O5含量较低。泥浆样品的XRD分析表明,矿物成分主要为石英、伊利石、方解石、绿泥石、长石、高岭石和其他次要矿物,如石盐、蒙脱石、氟磷灰石、辉石、角闪石。还测定了泥浆样品的有机物和理化参数。测定了泥浆样品中的潜在有毒元素,并与参考值和技术标准进行了比较。本研究提出,研究区域的盐水泥浆样品是潜在的类骨盆。
{"title":"Chemical, mineralogical, and physicochemical features of surface saline muds from Southwestern sub-basin of the East Vietnam Sea: Implication for new peloids","authors":"Luong Le Duc, H. Nguyen, R. Shinjo, Renat B. Shakirov, A. Obzhirov","doi":"10.15625/2615-9783/16561","DOIUrl":"https://doi.org/10.15625/2615-9783/16561","url":null,"abstract":"This study presents the chemical, mineralogical and physicochemical features of 8 saline mud samples from 8 gravity cores located in the southwestern sub-basin of the East Vietnam Sea. The grain-size analysis of mud samples reveals the amount of clay and silt particles in the ranges of 65.1-89.2% and 9.5-34.2%, respectively and a very low fraction of sand. The analytical results showed that mud samples have high contents of SiO2 (32.79-48.09%), Al2O3 (11.26-13.63%), CaO (3.10-13.93%), Fe2O3 (4.15-9.45%), and low contents of TiO2, MnO, MgO, Na2O, K2O and P2O5. The XRD analysis of mud samples indicated mineral compositions with major minerals of quartz, illite, calcite, chlorite, feldspar, kaolinite, and other minor minerals like halite, smectite, fluorapatite, pyroxene, amphibole. The organic and physicochemical parameters of mud samples were also measured. Potentially toxic elements in mud samples were determined and compared with reference values and the technical standard. This study proposes that saline mud samples from the studied area are potential peloids.","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46266299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Assessing trophic status of Suoi Hai Reservoir using Carlson’s Trophic State Index 利用卡尔森营养状态指数评价索海水库的营养状况
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-09-17 DOI: 10.15625/2615-9783/16562
Linh Nguyen Thuy, Ha Nguyen Thi Thu, Thao Nguyen Thien Phuong, Vinh Pham Quang
The water quality of Suoi Hai reservoir, the largest reservoir in Hanoi city, is being threatened by human activities of the surrounding area, as reported by the press. The trophic status of the reservoir is the result of both natural eutrophication and nutrient inputs from anthropogenic sources, particularly the leachate from a lakeside waste treatment plant. This study aims to identify the trophic status of the Suoi Hai reservoir and the changes of water trophic state over space and time. Data of chlorophyll-a concentration, total phosphorus, and Secchi disk depth from 51 sites during three field campaigns in October 2019, August 2020, and March 2021 was used to calculate Carlson’s trophic state index (CTSI). Resultant CTSI (ranged from 60 to 72) allows classifying Suoi Hai reservoir as highly eutrophic water. Its variations in space and time provided evidence for an influence of anthropogenic activities on the reservoir trophic state. Analysis of the trophic state index deviations suggested that total phosphorus is the key factor that influenced the reservoir trophic state. Therefore, managing the anthropogenic nutrient inputs load to the reservoir should be a critical task to control eutrophication in Suoi Hai Reservoir at present. 
据媒体报道,河内市最大的水库锁海水库的水质正受到周围地区人类活动的威胁。水库的营养状况是自然富营养化和人为来源的营养输入的结果,特别是湖边垃圾处理厂的渗滤液。本研究旨在确定锁海水库的营养状况以及水营养状态在空间和时间上的变化。在2019年10月、2020年8月和2021年3月的三次野外活动中,来自51个地点的叶绿素a浓度、总磷和塞奇盘深度数据用于计算卡尔森营养状态指数(CTSI)。所得到的CTSI(范围从60到72)允许将锁海水库分类为高度富营养化水。它在空间和时间上的变化为人类活动对水库营养状态的影响提供了证据。营养状态指数偏差分析表明,总磷是影响水库营养状态的关键因素。因此,管理水库的人为营养输入负荷应成为当前控制锁海水库富营养化的关键任务。
{"title":"Assessing trophic status of Suoi Hai Reservoir using Carlson’s Trophic State Index","authors":"Linh Nguyen Thuy, Ha Nguyen Thi Thu, Thao Nguyen Thien Phuong, Vinh Pham Quang","doi":"10.15625/2615-9783/16562","DOIUrl":"https://doi.org/10.15625/2615-9783/16562","url":null,"abstract":"The water quality of Suoi Hai reservoir, the largest reservoir in Hanoi city, is being threatened by human activities of the surrounding area, as reported by the press. The trophic status of the reservoir is the result of both natural eutrophication and nutrient inputs from anthropogenic sources, particularly the leachate from a lakeside waste treatment plant. This study aims to identify the trophic status of the Suoi Hai reservoir and the changes of water trophic state over space and time. Data of chlorophyll-a concentration, total phosphorus, and Secchi disk depth from 51 sites during three field campaigns in October 2019, August 2020, and March 2021 was used to calculate Carlson’s trophic state index (CTSI). Resultant CTSI (ranged from 60 to 72) allows classifying Suoi Hai reservoir as highly eutrophic water. Its variations in space and time provided evidence for an influence of anthropogenic activities on the reservoir trophic state. Analysis of the trophic state index deviations suggested that total phosphorus is the key factor that influenced the reservoir trophic state. Therefore, managing the anthropogenic nutrient inputs load to the reservoir should be a critical task to control eutrophication in Suoi Hai Reservoir at present. ","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46012748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Characterization of ionospheric irregularities over Vietnam and adjacent region for the 2008-2018 period 2008-2018年越南及其邻近地区电离层不规则性特征
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-08-30 DOI: 10.15625/2615-9783/16502
Dung Nguyen Thanh, M. Huy, C. Amory-Mazaudier, R. Fleury, S. Saito, Thang Nguyen Chien, H. P. Thu, T. L. Truong, Mai Nguyen Thi
This paper presents the variations of the rate of change of Total Electron Content (TEC) index (ROTI), characterizing the occurrence of ionospheric plasma irregularities over Vietnam and neighboring countries in the Southeast Asian region using the continuous GPS data during the 2008-2018 period. The results showed that the occurrence of strong ROTI in all stations is maximum in equinox months March/April and September/October and depends on solar activity. The ROTI is weak during periods of low solar activity and strong during periods of high solar activity. There is an asymmetry between the two equinoxes. During maximum and declining phases of 2014-2016, occurrence rates in March equinox are larger than in September equinox, but during the descending period of 2010-2011, the occurrence rates in September equinox at almost all stations are larger than in March equinox. The correlation coefficients between the monthly occurrence rate of irregularities and the F10.7 solar index at the stations in the equatorward EIA crest region are higher than at those in the magnetic equatorial and the poleward EIA crest regions. The irregularity occurrence is high in the pre-midnight sector, maximum between 2000 LT to 2200 LT. The maximum irregularity occurrence is located around 4-5° degrees in latitude equator-ward away from the anomaly crests.
本文介绍了2008-2018年期间总电子含量(TEC)指数(ROTI)变化率的变化,利用连续GPS数据描述了越南和东南亚地区邻国电离层等离子体不规则现象的发生。结果表明,各气象站的强ROTI在3月/4月和9月/10月的春分月份出现最多,这取决于太阳活动。ROTI在低太阳活动期较弱,在高太阳活动期较强。两个分点之间存在不对称性。在2014-2016年的最大值和下降期,春分的发生率大于春分,但在2010-2011年的下降期,几乎所有站点的春分发生率都大于春分。赤道向EIA峰区台站的月不规则发生率与F10.7太阳指数之间的相关系数高于磁赤道和极地EIA峰区。午夜前扇区的不规则性发生率很高,最大值在2000 LT至2200 LT之间。最大不规则性出现在纬度赤道向异常峰方向4-5°左右。
{"title":"Characterization of ionospheric irregularities over Vietnam and adjacent region for the 2008-2018 period","authors":"Dung Nguyen Thanh, M. Huy, C. Amory-Mazaudier, R. Fleury, S. Saito, Thang Nguyen Chien, H. P. Thu, T. L. Truong, Mai Nguyen Thi","doi":"10.15625/2615-9783/16502","DOIUrl":"https://doi.org/10.15625/2615-9783/16502","url":null,"abstract":"This paper presents the variations of the rate of change of Total Electron Content (TEC) index (ROTI), characterizing the occurrence of ionospheric plasma irregularities over Vietnam and neighboring countries in the Southeast Asian region using the continuous GPS data during the 2008-2018 period. The results showed that the occurrence of strong ROTI in all stations is maximum in equinox months March/April and September/October and depends on solar activity. The ROTI is weak during periods of low solar activity and strong during periods of high solar activity. There is an asymmetry between the two equinoxes. During maximum and declining phases of 2014-2016, occurrence rates in March equinox are larger than in September equinox, but during the descending period of 2010-2011, the occurrence rates in September equinox at almost all stations are larger than in March equinox. The correlation coefficients between the monthly occurrence rate of irregularities and the F10.7 solar index at the stations in the equatorward EIA crest region are higher than at those in the magnetic equatorial and the poleward EIA crest regions. The irregularity occurrence is high in the pre-midnight sector, maximum between 2000 LT to 2200 LT. The maximum irregularity occurrence is located around 4-5° degrees in latitude equator-ward away from the anomaly crests.","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42059947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Paleogene granite magmatism in the north of the Truong Son belt and implication for crustal evolution Truong Son带北部古近系花岗岩岩浆作用及其对地壳演化的意义
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-08-19 DOI: 10.15625/2615-9783/16444
Huan Trinh Dinh, Tri Luu Cong, A. Tuan, Anh Tran Viet, Giang Phan Hoang, Takahashi, Saadsy
Abundant granitoids aged 24.59 Ma to 28.62 Ma were exposed along Phu Hoat high metamorphic zone, northern of the Truong Son belt, termed Na Khoun complex in Northern Laos (NL) and Ban Chieng complex in Western Vietnam (WV). Ten granitic samples were collected from these complexes show geochemical characteristics of high SiO2 and K2O contents, medium peraluminous that belong to S-type granites. Initial 87Sr/86Sr isotopic ratios and εNd(t) are broad values of 0.708507 to 0.74539 and -5.22 to -12.66, respectively, together with high 206Pb/204Pb (18.864-19.392), 207Pb/204Pb (15.736-15.841) and 208Pb/204Pb (39.224-40.080) which indicated crustal origin, we suggest that the NL-WV intrusion was associated with transpression form by the India-Asia collision events during Cenozoic.
长顺带北部的Phu Hoat高变质带暴露了大量年龄为24.59 ~ 28.62 Ma的花岗岩类,分别为老挝北部的Na Khoun杂岩(NL)和越南西部的Ban Chieng杂岩(WV)。从这些杂岩体中采集的10个花岗岩样品显示出高SiO2和K2O含量、中等过铝质的地球化学特征,属于s型花岗岩。87Sr/86Sr初始同位素比值和εNd(t)分别为0.708507 ~ 0.74539和-5.22 ~ -12.66,且206Pb/204Pb(18.864 ~ 19.392)、207Pb/204Pb(15.736 ~ 15.841)和208Pb/204Pb(39.223 ~ 40.080)较高,显示出地壳成因,认为NL-WV侵入与新生代印度-亚洲碰撞事件的逆压形成有关。
{"title":"Paleogene granite magmatism in the north of the Truong Son belt and implication for crustal evolution","authors":"Huan Trinh Dinh, Tri Luu Cong, A. Tuan, Anh Tran Viet, Giang Phan Hoang, Takahashi, Saadsy","doi":"10.15625/2615-9783/16444","DOIUrl":"https://doi.org/10.15625/2615-9783/16444","url":null,"abstract":"Abundant granitoids aged 24.59 Ma to 28.62 Ma were exposed along Phu Hoat high metamorphic zone, northern of the Truong Son belt, termed Na Khoun complex in Northern Laos (NL) and Ban Chieng complex in Western Vietnam (WV). Ten granitic samples were collected from these complexes show geochemical characteristics of high SiO2 and K2O contents, medium peraluminous that belong to S-type granites. Initial 87Sr/86Sr isotopic ratios and εNd(t) are broad values of 0.708507 to 0.74539 and -5.22 to -12.66, respectively, together with high 206Pb/204Pb (18.864-19.392), 207Pb/204Pb (15.736-15.841) and 208Pb/204Pb (39.224-40.080) which indicated crustal origin, we suggest that the NL-WV intrusion was associated with transpression form by the India-Asia collision events during Cenozoic.","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47382999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Investigation and prediction of noise pollution levels from wind turbines: A case study of Nexif Energy Ben Tre wind power plant, South Vietnam 风机噪声污染水平的调查和预测——以南越Nexif Energy Ben Tre风电场为例
IF 1.5 Q2 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-08-19 DOI: 10.15625/2615-9783/16443
Huan Nguyen Quoc, Cuong Tran Thien, Cu Nguyen Xuan, T. V. Dinh, Minh Tran, Liem Ngo Van
In recent years, the demand for electric power in Vietnam has increased at annual growth rates of 10% to 12%, and the challenge is to promote renewable energy sector. One of these sustainable energy sources is to harness energy from the wind through wind turbines (WTs). In fact, more wind power plants in Vietnam are continuously to be built due to the rapidly growing demand of country's industrialization and modernization process. However, a significant hindrance preventing the widespread use of WTs in Vietnam is the noise they produce, which significantly contributes to the annoyance experienced by residents living near wind farms. The prediction of noise impacts for new wind farms is one of the many aspects of the environmental impact assessment process in Vietnam as well as in the world. In addition, the determination of the 45 dBA noise contour-line is very important because it is the basis for determining the scope of the project impact according to the IFC/WB performance standards and the number of households to be relocated from the project site. The article’s main focus is therefore on the estimation and simulation of the acoustical noise produced by 18 WTs during the operation phase of Nexif Energy Ben Tre wind power plant and the background noise levels at the project site have been performed by using a combination of specific study methods such as environmental modeling (iNoise Pro modeling software), mapping and geographic information systems. The obtained results show the importance of using modeling method in quantifying the noise levels generated from 18 wind turbines of the Nexif Energy Ben Tre wind power plant met IFC standard and Vietnamese regulation on noise during day-time, but did not meet IFC standard on noise during night-time. The level of background noise measured during night-time in the project area also did not meet IFC standard. Therefore, the overall cumulative noise level exceeds the IFC standard for residential area (45 dBA only). In addition, the appropriate solutions to reduce noise levels from WTs are also proposed.
近年来,越南的电力需求以每年10%至12%的增长率增长,挑战在于促进可再生能源行业。这些可持续能源之一是通过风力涡轮机(WT)利用风能。事实上,由于越南工业化和现代化进程的快速增长需求,越南正在不断建设更多的风电场。然而,阻碍WT在越南广泛使用的一个重要障碍是其产生的噪音,这大大增加了居住在风电场附近的居民的烦恼。预测新风电场的噪声影响是越南和世界环境影响评估过程的许多方面之一。此外,45 dBA噪声等值线的确定非常重要,因为它是根据国际金融公司/世界银行绩效标准确定项目影响范围和从项目现场搬迁的家庭数量的基础。因此,本文的主要重点是对Nexif Energy Ben Tre风电场运行阶段18个WT产生的声学噪声进行估计和模拟,并通过使用特定研究方法的组合,如环境建模(iNoise Pro建模软件),地图和地理信息系统。所获得的结果表明,在量化Nexif Energy Ben Tre风力发电厂18台风力涡轮机产生的噪声水平时,使用建模方法的重要性符合国际金融公司的标准和越南关于白天噪声的法规,但不符合国际金融公司关于夜间噪声的标准。项目区域夜间测量的背景噪声水平也不符合IFC标准。因此,总体累积噪声水平超过了国际金融公司对住宅区的标准(仅45 dBA)。此外,还提出了降低WT噪声水平的适当解决方案。
{"title":"Investigation and prediction of noise pollution levels from wind turbines: A case study of Nexif Energy Ben Tre wind power plant, South Vietnam","authors":"Huan Nguyen Quoc, Cuong Tran Thien, Cu Nguyen Xuan, T. V. Dinh, Minh Tran, Liem Ngo Van","doi":"10.15625/2615-9783/16443","DOIUrl":"https://doi.org/10.15625/2615-9783/16443","url":null,"abstract":"In recent years, the demand for electric power in Vietnam has increased at annual growth rates of 10% to 12%, and the challenge is to promote renewable energy sector. One of these sustainable energy sources is to harness energy from the wind through wind turbines (WTs). In fact, more wind power plants in Vietnam are continuously to be built due to the rapidly growing demand of country's industrialization and modernization process. However, a significant hindrance preventing the widespread use of WTs in Vietnam is the noise they produce, which significantly contributes to the annoyance experienced by residents living near wind farms. The prediction of noise impacts for new wind farms is one of the many aspects of the environmental impact assessment process in Vietnam as well as in the world. In addition, the determination of the 45 dBA noise contour-line is very important because it is the basis for determining the scope of the project impact according to the IFC/WB performance standards and the number of households to be relocated from the project site. The article’s main focus is therefore on the estimation and simulation of the acoustical noise produced by 18 WTs during the operation phase of Nexif Energy Ben Tre wind power plant and the background noise levels at the project site have been performed by using a combination of specific study methods such as environmental modeling (iNoise Pro modeling software), mapping and geographic information systems. The obtained results show the importance of using modeling method in quantifying the noise levels generated from 18 wind turbines of the Nexif Energy Ben Tre wind power plant met IFC standard and Vietnamese regulation on noise during day-time, but did not meet IFC standard on noise during night-time. The level of background noise measured during night-time in the project area also did not meet IFC standard. Therefore, the overall cumulative noise level exceeds the IFC standard for residential area (45 dBA only). In addition, the appropriate solutions to reduce noise levels from WTs are also proposed.","PeriodicalId":23639,"journal":{"name":"VIETNAM JOURNAL OF EARTH SCIENCES","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49233309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
期刊
VIETNAM JOURNAL OF EARTH SCIENCES
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1