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Minimizing the displacement of integrated system of wind and tidal turbines based on the soil types under cyclic loads 循环荷载作用下基于土壤类型的风潮轮机综合系统位移最小化研究
IF 1.3 Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023028
Navid Majdi Nasab, A. Wang
Hybrid offshore platforms are complex structures that need to tolerate cyclic loads. These loads occur when the turbine is working between cut-in and cut-out speeds and depend on the turbine's rotational speeds. However, selecting a proper soil for the structure to be secured in is very important for the stability of the hybrid system. This study aimed to calculate the displacement of an integrated offshore structure capable of supporting a hybrid assembly of one wind plus two tidal turbines under cyclic loads. The monopile has been found to be a suitable foundation type, as the most inexpensive solution in water depths less than 30 meters, for integrating both types of turbines. The deflection of the structure was compared for different types of soil with finite element analysis. Several simulations were conducted using OPTUM G3 software for calculating the stability of each type of soil in the rotational speed range of turbines. The results enable determining the amount of deflection for each soil type. The displacement range for soft clay is 0.0052 to 0.0098 m, and displacement is between 0.007 and 0.0158 m for medium sand. The minimum displacement of firm clay, which is 0.0115 meters at 5 rpm, is higher than all minima of other soil types. Thus, soft clay and medium sand show more stability, and firm clay is less stable in the rotational speed range of the turbines.
混合海上平台是一种复杂的结构,需要承受循环载荷。这些负荷发生在涡轮机在切断和切断速度之间工作时,并取决于涡轮机的转速。然而,选择合适的土来保证结构的稳定对混合系统的稳定性是非常重要的。本研究旨在计算一个集成的海上结构的位移,该结构能够在循环载荷下支持一个风力和两个潮汐涡轮机的混合组件。单桩已被发现是一种合适的基础类型,作为在水深小于30米的最便宜的解决方案,集成两种类型的涡轮机。通过有限元分析,比较了不同土体类型下结构的挠度。利用OPTUM G3软件进行了多次模拟,计算了各类型土壤在涡轮机转速范围内的稳定性。结果可以确定每种土壤类型的挠度。软土的位移范围为0.0052 ~ 0.0098 m,中砂的位移范围为0.007 ~ 0.0158 m。坚固黏土在5rpm时的最小位移值为0.0115 m,高于其他土型的最小位移值。因此,在涡轮机的转速范围内,软粘土和中砂表现出更强的稳定性,而坚固粘土的稳定性较差。
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引用次数: 0
Prioritizing climate adaptation at the local level in Ghana 优先考虑加纳地方一级的气候适应
Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023033
Kirk B Enu, Albert Ahenkan, Emmanuel Ackom

The increasing intensity and frequency of climate impacts exacerbate pressures on front-line local communities. This calls for location-specific adaptation strategies. Alignment of strategies with respective National Climate Change Strategy is key for the overall sustainability of initiatives and local communities. The work presented in this paper examines the adoption and prioritization of climate adaptation policies at the local level based on a case study of the Adansi North District (AND) in Ghana. An assessment of the extent to which climate adaptation policies are captured and budgeted for was done via a review of the district’s medium-term development and key political actors were interviewed to assess the level of priority they place on climate adaptation. Findings from the study reveal that 41% of the locally adopted policies directly align with stipulated national level policies. We attribute the adoption of climate policies in AND to local political actors having higher education which has afforded them good understanding of the climate change phenomenon, being experienced professionals and having to work within institutional rubrics that make climate policy formulation a requirement. However, little priority is given to these policies for implementation, mainly through the non-allocation of funds. We account for this with the weak environmental advocacy in the district and exchange between actors on adaptation. Furthermore, partisan actors who already wield veto powers and can promote policies that may not necessarily support adaptation measures, often do so, since their interest is to become popular among electorates who also prefer infrastructure over environmental policies. We conclude that although climate adaptation policies are fairly adopted and budgeted for in AND, they have not received commensurate priority for implementation. Recommendations are proposed for addressing this.

& lt; abstract>气候影响的强度和频率不断增加,加剧了一线当地社区的压力。这就需要针对具体地点的适应战略。将战略与各自的国家气候变化战略保持一致是各项举措和当地社区整体可持续性的关键。本文介绍的工作以加纳阿丹西北区(and)为例,研究了地方一级气候适应政策的采用和优先顺序。通过对该地区中期发展的审查,对气候适应政策的落实程度和预算进行了评估,并对主要政治行为者进行了访谈,以评估他们对气候适应的优先程度。研究结果显示,41%的地方采用的政策与国家规定的政策直接一致。我们将气候政策在AND的采用归因于当地政治参与者受过高等教育,这使他们对气候变化现象有了很好的了解,他们是经验丰富的专业人士,并且必须在使气候政策制定成为一项要求的制度准则内工作。但是,这些政策的执行很少得到优先考虑,主要是由于没有拨出资金。我们将此归因于该地区环境倡导的薄弱以及参与者之间在适应方面的交流。此外,党派行为者已经拥有否决权,可以推动不一定支持适应措施的政策,他们经常这样做,因为他们的利益是在更喜欢基础设施而不是环境政策的选民中受欢迎。我们的结论是,尽管气候适应政策在and中得到了公平的采纳和预算,但它们并没有得到相应的实施优先权。提出了解决这一问题的建议。& lt; / abstract>
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引用次数: 0
Study on the spatial variation of sensitivity of soil nutrient system in Xinjiang, China 新疆土壤养分系统敏感性的空间分异研究
Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023034
Yang Sheng, Dehua Sun, Weizhong Liu

Previous studies have explored the long time series and large-scale cultivated land nutrient sensitivity and its spatial differentiation characteristics in arid zones from human activities in the context of climate change. This study is based on 10-year interval data on soil nutrient content of cultivated land in the oasis in Xinjiang, China, cultivated land use intensity (LUI) and climate data sets. Using sensitivity and GIS analysis methods, this paper studies soil nutrient sensitivities and their spatial distribution patterns in the context of LUI and climate change. The results showed significant response differences and spatial heterogeneity regarding the sensitivity of soil nutrient systems to LUI and climate change. Among them, soil nutrients were the most sensitive to temperature changes, followed by LUI, while precipitation was the weakest. Soil nutrient sensitivity showed a decreasing spatial distribution pattern from the northeast to the southwest. The soil nutrient system had a strong adaptability to LUI and climate change. However, there were differences in different sensitivity states. These results provide scientific guidance for the spatial selection and implementation of soil fertility enhancement and land remediation projects in similar arid areas.

& lt; abstract>前人的研究探索了气候变化背景下干旱区人类活动对长时间序列、大尺度耕地养分敏感性及其空间分异特征。本研究基于新疆绿洲耕地土壤养分含量、耕地利用强度(LUI)和气候数据集的10年间隔数据。利用敏感性和GIS分析方法,研究了LUI和气候变化背景下土壤养分敏感性及其空间分布格局。结果表明,土壤养分系统对LUI和气候变化的敏感性存在显著的响应差异和空间异质性。其中,土壤养分对温度变化最敏感,LUI次之,降水最弱。土壤养分敏感性呈现由东北向西南递减的空间分布格局。土壤养分系统对LUI和气候变化具有较强的适应性。但在不同的敏感状态下存在差异。这些结果为类似干旱区土壤肥力增强和土地修复项目的空间选择和实施提供了科学指导。& lt; / abstract>
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引用次数: 0
Design basis for Arctic infrastructure facilities 北极基础设施设计基础
IF 1.3 Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023006
Liv Brita Hætta Myrmel, O. Gudmestad
A discussion related to the selection of a proper design basis for Arctic infrastructure facilities is presented. The design basis, which must be sufficiently robust to ensure safe operations of the facilities during their planned lifetime, should include relevant information available from the local and indigenous people of the area. The need to properly document all data and assumptions made when preparing the design basis is highlighted, and it is emphasized that, in the case of the upgrading of the facilities, all new data collected must be included in the database. Documentation of all updating is necessary and must be available to all involved during maintenance activities and for possible later upgrading of the facilities. This database must be available digitally, as access to the basics for the design may be of particular concern in the sparsely populated Arctic region, where the distribution of paper copies takes a long time, particularly in the case of emergency situations. Therefore, this database must be protected from cyberattacks. A "Plan B" is needed to ensure that a backup of the fully updated design basis documents, as well as documentation of the "as built" facilities, is available at any time.
对北极基础设施合理设计基础的选择进行了讨论。设计基础必须足够坚固,以确保设施在其计划使用寿命内安全运行,其中应包括从该地区的当地人民和土著人民那里获得的有关资料。委员会强调,在编制设计基础时必须妥善记录所有数据和假设,并强调,在升级设施的情况下,必须将收集到的所有新数据列入数据库。所有更新的文件都是必要的,并且必须提供给所有参与维护活动的人,以便以后可能对设施进行升级。该数据库必须以数字方式提供,因为在人口稀少的北极地区,获取设计的基本资料可能特别令人关切,因为分发纸质副本需要很长时间,特别是在紧急情况下。因此,必须保护该数据库免受网络攻击。需要一个“B计划”,以确保在任何时候都可以获得完全更新的设计基础文件的备份,以及“建成”设施的文件。
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引用次数: 0
Theoretical evaluation of the power efficiency of a moored hybrid floating platform for wind and wave energy production in the Greek seas 希腊海域用于风能和波浪能源生产的系泊混合浮动平台功率效率的理论评估
IF 1.3 Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023009
Kimon Kardakaris, D. Konispoliatis, T. Soukissian
In this study, an extreme value analysis of wind and wave parameters is presented for three specific locations in the Greek seas that are known to be advantageous in terms of joint power production (both offshore wind and wave) and bathymetric conditions. The analysis is conducted via the Peak-Over-Threshold method, examining wind speed, significant wave height and peak wave period data from the ERA5 reanalysis dataset. Moreover, a multi-purpose floating platform suitable for offshore energy production is presented, which combines wind and wave energy resources exploitation and can be adequately utilized at the selected locations. The analysis is built to incorporate the solutions of the diffraction, motion-dependent and pressure-dependent radiation problems around the floating structure, along with the mooring line and wind turbine (WT) characteristics. Subsequently, a coupled hydro-aero-elastic analysis was performed in the frequency domain, while a dynamic analysis was conducted in order to evaluate the mooring characteristics. Lastly, offshore wind output and absorbed wave energy values were estimated, and different types of mooring systems were compared in terms of efficiency. It has been concluded that the wind energy capacity factor is higher than 50% in all the examined locations, and by the mooring system comparison, the tension-leg platform (TLP) represents the best-case scenario for wave energy absorption.
在这项研究中,对希腊海域的三个特定地点进行了风和波参数的极值分析,这些地点已知在联合发电(海上风和波)和水深条件方面具有优势。利用ERA5再分析数据集的风速、有效波高和峰值波周期数据,采用峰值-超阈值法进行分析。此外,提出了一种适合海上能源生产的多用途浮动平台,该平台结合了风能和波浪能资源的开发,可以在选定的地点充分利用。该分析结合了浮动结构周围的衍射、运动相关和压力相关辐射问题的解决方案,以及系泊线和风力涡轮机(WT)的特性。随后,在频域进行了水-气-弹耦合分析,同时进行了动力分析,以评估系泊特性。最后,估算了海上风力输出和吸收波能值,并比较了不同类型系泊系统的效率。结果表明,在所有测试地点,风能容量因子均大于50%,并且通过系泊系统的比较,张力腿平台(TLP)代表了吸收波浪能的最佳情况。
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引用次数: 1
Thermodynamic and geochemical studies of formation water in Rag-e Sefid oil and gas field, Iran 伊朗拉格-塞菲德油气田地层水热力学与地球化学研究
IF 1.3 Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023031
Seyed Hossein Hashemi, Abas Niknam, A. K. Torghabeh, Nuno Pimentel
Nowadays, the concentration of mineral cations and anions in the formation water of oil and gas fields is a challenging issue for oil industry technicians managing the formation of mineral deposits during water injection operations. For this reason, the analysis of formation water mineral ions during exploitation operations can be a valuable solution for the efficient management of oil production. Therefore, in this research, the thermodynamic and geochemical evaluation of formation water in the Reg-e Sefid oil and gas field is considered. Based on the results of this study, the formation of calcium sulfate and calcium carbonate can be expected due to the concentration of mineral ions dissolved in the formation water in the Reg-e Sefid oil and gas field according to the StimCad2 software. Also, based on the evaluation of ion ratios, the studied oil and gas field formation has ideal conditions for hydrocarbon production. Based on the results obtained from the comparison of the water and rock formation of the Rag-e Sefid oil and gas field, the source of ions (except calcium and magnesium ions) is related to ancient sea water.
目前,油气田地层水中矿物阳离子和阴离子的浓度是石油工业技术人员在注水作业中管理矿床地层的一个具有挑战性的问题。因此,在开采过程中对地层水中矿物离子进行分析可以为有效的石油生产管理提供有价值的解决方案。因此,本研究考虑了regg -e Sefid油气田地层水的热力学和地球化学评价。根据本研究结果,根据StimCad2软件,根据Reg-e Sefid油气田地层水中溶解的矿物离子浓度,可以预测其形成硫酸钙和碳酸钙。同时,根据离子比的评价,所研究的油气田地层具有理想的产烃条件。根据rage Sefid油气田水体与岩层对比结果,除钙、镁离子外,其他离子来源与古海水有关。
{"title":"Thermodynamic and geochemical studies of formation water in Rag-e Sefid oil and gas field, Iran","authors":"Seyed Hossein Hashemi, Abas Niknam, A. K. Torghabeh, Nuno Pimentel","doi":"10.3934/geosci.2023031","DOIUrl":"https://doi.org/10.3934/geosci.2023031","url":null,"abstract":"Nowadays, the concentration of mineral cations and anions in the formation water of oil and gas fields is a challenging issue for oil industry technicians managing the formation of mineral deposits during water injection operations. For this reason, the analysis of formation water mineral ions during exploitation operations can be a valuable solution for the efficient management of oil production. Therefore, in this research, the thermodynamic and geochemical evaluation of formation water in the Reg-e Sefid oil and gas field is considered. Based on the results of this study, the formation of calcium sulfate and calcium carbonate can be expected due to the concentration of mineral ions dissolved in the formation water in the Reg-e Sefid oil and gas field according to the StimCad2 software. Also, based on the evaluation of ion ratios, the studied oil and gas field formation has ideal conditions for hydrocarbon production. Based on the results obtained from the comparison of the water and rock formation of the Rag-e Sefid oil and gas field, the source of ions (except calcium and magnesium ions) is related to ancient sea water.","PeriodicalId":43999,"journal":{"name":"AIMS Geosciences","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70251621","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
Post-pandemic scenarios. The role of the Italian National Recovery and Resilience Plan (NRRP) in reducing the gap between the Italian Central-Northern regions and Southern ones 流行后的场景。意大利国家恢复和恢复力计划在缩小意大利中北部地区与南部地区之间差距方面的作用
IF 1.3 Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023030
Stefania Palmentieri
The Covid-19 pandemic and the Ukraine crises fit into the difficult Italian context, which have already been marked by a deep socioeconomic gap between the Centre-North and the South of the country. After a brief examination of the causes that have led to this gap, starting from the analysis of geographical studies on the subject and elaborations of data provided by important research centres in the field, this study aims to point out the sectors of Southern Italy present greater criticalness and backwardness compared to the rest of the country. Then, we identify the most suitable programmatic lines to increase investments in such sectors, as already provided for the Italian National Recovery and Resilience Plan (NRRP—in Italy PNRR), a program with which the government intends to manage Next Generation EU funds or NGEU (the economic recovery and revitalization tool introduced by the European Union to restore the losses caused by the pandemic). The article concludes with a reflection on the main reasons for the difficulties that the NRRP is encountering by implementing this program, mainly related to the insufficient allocation of resources and competencies of the territorial authorities that are entrusted with the task of managing and planning policies to rebalance the country*s growth potential.
2019冠状病毒病大流行和乌克兰危机符合意大利的困难背景,该国中北部和南部之间已经存在严重的社会经济差距。在对导致这一差距的原因进行简要审查之后,从对该主题的地理研究的分析和对该领域重要研究中心提供的数据的详细阐述开始,本研究旨在指出,与该国其他地区相比,意大利南部的部门表现出更大的批判性和落后性。然后,我们确定最合适的方案项目,以增加对这些部门的投资,如意大利国家恢复和弹性计划(nrp -在意大利PNRR)所规定的那样,政府打算通过该计划管理下一代欧盟基金或NGEU(欧盟为恢复大流行造成的损失而引入的经济复苏和振兴工具)。文章最后反思了NRRP在实施这一计划时遇到的困难的主要原因,主要与负责管理和规划政策以重新平衡国家增长潜力的领土当局的资源分配和能力不足有关。
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引用次数: 0
Geotechnical characterization of index and deformation properties of Stockholm clays 斯德哥尔摩粘土指标及变形特性的岩土力学表征
IF 1.3 Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023015
S. Hov, David Gaharia
This paper describes the geotechnical characteristics of index and deformation properties of Stockholm clays. These clays exhibit large variations both geographically and with depth. The clays range from highly organic clays with high plasticity to silty clays with low plasticity. First, the geological conditions of the clays are outlined to qualitatively explain the typical soil stratigraphy encountered in the Stockholm area. Second, two large generic databases are presented, containing 3,500 and 1,600 data points, respectively. The data originates from routine testing and constant rate of strain oedometer tests conducted in commercial projects. The data is analyzed and compared with results from high quality block sampling. It is seen that a common feature of the clays are low undrained shear strengths, and consequently low yield stresses and oedometer moduli. Further, several deformation properties such as preconsolidation pressure and several oedometer moduli is shown to depend on the soils natural water content and its plasticity. Differences in sample quality is shown to highly affect some properties, highlighting the importance of quality sampling and handling of samples. Criteria for sample quality for this type of clay is proposed based on the oedometer moduli before and after the preconsolidation pressure. The paper can hopefully work as a useful reference to engineers working on similar soils worldwide.
本文介绍了斯德哥尔摩粘土的指标和变形特性的岩土力学特征。这些粘土在地理上和深度上都表现出很大的变化。粘土的范围从高塑性的高有机粘土到低塑性的粉质粘土。首先,概述了粘土的地质条件,以定性地解释斯德哥尔摩地区遇到的典型土壤地层学。其次,介绍了两个大型通用数据库,分别包含3,500和1,600个数据点。数据来源于商业项目中进行的常规测试和恒速率应变计测试。对数据进行了分析,并与高质量块采样结果进行了比较。可以看出,粘土的一个共同特征是低不排水抗剪强度,因此低屈服应力和流量计模量。此外,一些变形特性,如预固结压力和几个流量计模量,被证明取决于土壤的天然含水量及其塑性。样品质量的差异会严重影响某些特性,突出了样品质量采样和处理的重要性。根据预固结压力前后的测径模量,提出了这类粘土试样质量的判据。希望本文能对世界范围内类似土壤的工程技术人员提供有益的参考。
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引用次数: 0
Optimistic expectations and life satisfaction as antecedents of emigration attitudes among Bulgarian Millennials and Zoomers 乐观的期望和生活满意度是保加利亚千禧一代和千禧一代移民态度的先决条件
IF 1.3 Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023016
Diana I Bakalova, Ekaterina E Dimitrova
The purpose of this paper is to examine the predictive power of optimistic expectations and satisfaction with life in the country of origin and residence—Bulgaria, over attitudes towards emigration among young Bulgarians with regard to their generational belonging and age differences (i.e. Generation Y or Millennials and Generation Z or Zoomers). Although the correlation between satisfaction with life and migration (attitudes) has been studied in many countries, it has not been examined to date in Bulgaria (a sending, rather than receiving Eastern European country) in the light of optimistic expectations and age differences. Within a cross-sectional survey (N = 1200), representative of young Bulgarians aged 18–35 years—Zoomers aged 18–25 years (N = 444) and Millennials aged 26–35 years (N = 756), carried out in September-October 2021, optimistic expectations for individual development in Bulgaria, satisfaction with life in the country and emigration attitudes were measured using originally designed scales. The findings suggest that the more optimistic expectations about one's own career development and material security in the country are associated with higher satisfaction with life in Bulgaria and reasonably, with more negative attitudes towards emigration. Interestingly, optimistic expectations turned out a stronger antecedent of Zoomers' emigration attitudes compared to those of Millennials and life satisfaction—a stronger predictor of Millennials' emigration attitudes compared to those of Zoomers. Although no significant age differences in life satisfaction were found, Zoomers turned out significantly more optimistic about their future in the country, but also more attuned to emigration compared to Millennials. Young people with previous emigration experience were found to be significantly more likely to emigrate in comparison to those without prior emigration experience. The findings have some important interdisciplinary implications, both for psychological theory and for demographic policy.
本文的目的是研究乐观期望和对原籍国和居住地保加利亚生活满意度的预测能力,以及年轻保加利亚人对移民的态度,涉及他们的代属和年龄差异(即Y一代或千禧一代和Z一代或缩放一代)。虽然对生活的满意程度与移徙(态度)之间的关系已在许多国家进行了研究,但迄今为止,鉴于乐观的期望和年龄差异,保加利亚(一个送出而非接收的东欧国家)尚未对此进行研究。在一项横断面调查(N = 1200)中,18-35岁的保加利亚年轻人(N = 444)和26-35岁的千禧一代(N = 756)的代表,于2021年9月至10月进行,使用原始设计的量表测量了对保加利亚个人发展的乐观期望,对该国生活的满意度和移民态度。研究结果表明,对自己在保加利亚的职业发展和物质安全的乐观预期与对保加利亚生活的更高满意度相关,并且合理地对移民持更消极的态度。有趣的是,与千禧一代相比,乐观预期对千禧一代移民态度的影响更大,而生活满意度对千禧一代移民态度的影响更大。尽管在生活满意度方面没有发现明显的年龄差异,但与千禧一代相比,“放大一代”对他们在这个国家的未来明显更为乐观,但也更适应移民。与没有移民经历的年轻人相比,有移民经历的年轻人移民的可能性要大得多。这些发现对心理学理论和人口政策都有一些重要的跨学科意义。
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引用次数: 0
Prediction of blast-induced air overpressure using a hybrid machine learning model and gene expression programming (GEP): A case study from an iron ore mine 利用混合机器学习模型和基因表达编程(GEP)预测爆炸引起的空气超压:以某铁矿为例
IF 1.3 Pub Date : 2023-01-01 DOI: 10.3934/geosci.2023019
Mohammad Mirzehi Kalateh Kazemi, Zohreh Nabavi, M. Khandelwal
Mine blasting can have a destructive effect on the environment. Among these effects, air overpressure (AOp) is a major concern. Therefore, a careful assessment of the AOp intensity should be conducted before any blasting operation in order to minimize the associated environmental detriment. Several empirical models have been established to predict and control AOp. However, the current empirical methods have many limitations, including low accuracy, poor generalizability, consideration only of linear relationships among influencing parameters, and investigation of only a few influencing parameters. Thus, the current research presents a hybrid model which combines an extreme gradient boosting algorithm (XGB) with grey wolf optimization (GWO) for accurately predicting AOp. Furthermore, an empirical model and gene expression programming (GEP) were used to assess the validity of the hybrid model (XGB-GWO). An analysis of 66 blastings with their corresponding AOp values and influential parameters was conducted to achieve the goals of this research. The efficiency of AOp prediction methods was evaluated in terms of mean absolute error (MAE), coefficient of determination (R2), and root mean square error (RMSE). Based on the calculations, the XGB-GWO model has performed as well as the empirical and GEP models. Next, the most significant parameters for predicting AOp were determined using a sensitivity analysis. Based on the analysis results, stemming length and rock quality designation (RQD) were identified as two variables with the greatest influence. This study showed that the proposed XGB-GWO method was robust and applicable for predicting AOp driven by blasting operations.
矿井爆破会对环境造成破坏。在这些影响中,空气超压(AOp)是一个主要问题。因此,在任何爆破操作之前,应仔细评估AOp强度,以尽量减少相关的环境损害。建立了几个经验模型来预测和控制AOp。然而,现有的经验方法存在精度低、泛化性差、只考虑影响参数之间的线性关系、只研究少数影响参数等诸多局限性。因此,本研究提出了一种结合极端梯度增强算法(XGB)和灰狼优化(GWO)的混合模型来准确预测AOp。此外,利用经验模型和基因表达编程(GEP)对混合模型(XGB-GWO)的有效性进行了评估。为实现本研究的目标,对66次爆破及其相应的AOp值和影响参数进行了分析。从平均绝对误差(MAE)、决定系数(R2)和均方根误差(RMSE)三个方面评价AOp预测方法的有效性。计算结果表明,XGB-GWO模型的性能与经验模型和GEP模型相当。接下来,使用敏感性分析确定预测AOp的最重要参数。根据分析结果,确定了茎干长度和岩石质量标识(RQD)是影响最大的两个变量。研究表明,所提出的XGB-GWO方法具有较强的鲁棒性,适用于爆破作业驱动的AOp预测。
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引用次数: 3
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AIMS Geosciences
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