DEStech Transactions on Environment, Energy and Earth Science最新文献

{"title":"Indoor Environmental Quality Assessment and Building Shading Measures Research","authors":"Mingheng Li, Wenli Fan, Juan Lu, Dongfei Xue","doi":"10.12783/dteees/peems2019/33930","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33930","url":null,"abstract":"This paper starts with the evaluation of indoor environmental quality, and on this basis, analyzes the relationship between human comfort and various environmental factors, establishes a temperature-comfort evaluation model, and uses ECOTEC software to correlate according to the evaluation results of influencing factors. The laboratory simulation of the energy-saving measures for building shading shows that the temperature parameter is an important indicator for evaluating comfort. The relevant optimization measures such as building shading can not only save energy, but also significantly improve the environmental comfort. Introduction China's current green building assessment system puts forward higher requirements and standards for indoor environmental quality, indoor environment comfort and building energy conservation. Comfort is not a single feeling, but a combination of people and the environment, with a combination of environmental factors. Therefore, we collect the environmental parameters we need under appropriate conditions, make an accurate assessment of the excellent indoor environment, and associate it with comfort to complete the evaluation of comfort. This paper starts with the evaluation of indoor environmental quality, and analyzes the relationship between human comfort and various environmental factors, establishes a temperature-comfort evaluation model, and uses ECOTEC software to carry out relevant energy-saving measures based on the evaluation results of influencing factors. The laboratory simulation shows that the use of three-dimensional information technology to assist the design of the building can not only improve the design efficiency, but also make the design of the building more reasonable and the user more comfortable. Determination of Environmental Quality Assessment In the comprehensive environmental assessment, determining the membership function is an extremely important part, which largely determines the accuracy of data fusion. In this study, the Cauchy distribution was used to calculate membership. refers to the degree of attachment of the value of each sensor to the jth element in the set of reviews V established by it, then: ) 0 , 0 ( , ) ( 1 / 1 , 1              a a x a x a a x r ij i ij i ij i ij (1) According to the principle determined by the above comment set, combined with the relevant specifications, the membership degree of each sensor is set separately, and the normalized analysis is completed to obtain the fuzzy relationship evaluation matrix R:","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88847226","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}

{"title":"Amorphous Forming Ability, Thermal Stability, Viscosity and Thermoplastic Formability of (Cu43Zr48Al9)100-xREx (x=0-4, RE: Y,Gd) Alloy","authors":"Jinbao Zhao, Fan Xinhui, Bing Li, Ke‐Ke Yang, Y. Kong, Zhaofeng Wang, Jie Liu","doi":"10.12783/dteees/peems2019/33959","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33959","url":null,"abstract":"The width, deformation and viscosity change of super cooled liquid region of (Cu43Zr48Al9)100-xREx(x=0-4, RE: Y, Gd) bulk metallic glasses in super cooled liquid region are systemically investigated by thermoanalysis tests. By analyzing the width, deformation and viscosity of super cooled liquid region, the amorphous forming ability, thermal stability and thermoplastic forming ability of (Cu43Zr48Al9)100-xREx (x=0-4, RE: Y, Gd) in the super cooled liquid region were obtained. It was found that the addition of rare earth elements Y and Gd improved amorphous forming ability, thermal stability, viscosity and deformation, however, by adding rare earth Y, Gd, viscosity and ΔT was no obvious connection. With the increase of Y content, the thermal stability first increases and then decreases, the viscosity decreases firstly, then increases and decreases finally, the deformation increases firstly and then decreases, it preliminary reveals the relationship between viscosity and amorphous forming ability. (Cu43Zr48Al9)98Y2 amorphous alloy has better thermal stability and thermoplastic formability by adding a small amount of Y.","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89066745","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}

{"title":"Research on Variable Topological Structure and Flexible Networking Mode of Remote Monitoring System for Wind Farm","authors":"Feng Zhou, Kun Lin, Peng Jiang, Wen-Bo Hao","doi":"10.12783/dteees/peems2019/34016","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/34016","url":null,"abstract":"The requirements of the modern wind power development on the monitoring system networking mode are analyzed, and the wireless sensor network based on ZigBee protocol and the remote monitoring network scheme of wind farm based on 3G network are designed. The system has the advantages of variable topology and flexible networking, and realizes a two-layer and three-layer variable topology networking scheme for the self-organizing network, easy expansion and remote monitoring system of the wireless sensor network. A wind farm video surveillance solution based on 3G network is designed for unattended wind farms. The system has the advantages of strong scalability, high reliability, strong real-time performance, safety and reliability, and low operating cost. It is especially suitable for online monitoring of remote wind farms.","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86377781","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}

{"title":"Design of Multi-effect Evaporator for Sewage Treatment","authors":"Aoni Zhang, Jin-hui Zhao, Yuxia Bai, Haifen Han, Y. Bu","doi":"10.12783/dteees/peems2019/33923","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33923","url":null,"abstract":"This paper takes chemical salt water treatment as an example, to describe the desigen process of multi-effect evaporation sewage treatment equipment. Using software to simulate and analyze the influence of different factors on the results. Using line graphs to show the results of operating conditions of Luoyang Sinopec Branch. Introduction Evaporation refers to the process of evaporating and concentrating the solution containing the non-volatile solute and the volatile solvent, mainly by heating to vaporize a part of the solvent in the solution [1]. The multi-effect evaporator uses the secondary steam produced in the evaporation production as the heat source of the next unit. Such as, liter film multi-effect evaporator, falling film multi-effect evaporator [2], steam recompression multi-effect evaporator[3]. Multi-effect Evaporator Design Select Design Software and Reasons Aspen Plus was used to establish a chemical salt water treatment system. (1) The model physical property database is complete and suitable for more complex process simulation. (2) Fast unit simulation is possible. (3) With advanced calculation methods, the model can be optimized. Setting the Composition of Salty Sewage It is difficult to determine accurate data for these substances, such as chemical formula, content, etc. Therefore, in the modeling verification, the sewage composition needs to be simplified. In this design experiment, according to the sewage component in the sewage data of Luoyang Sinopec Branch, it is assumed that the large particle insoluble sludge has been removed. Common electrolytes such as ions and potassium ions are used as impurities, and volatile impurities are not considered at present[4]. Determination of Multi-effect Evaporator Efficiency With the increase in the efficiency of the multi-effect evaporator, the amount of steam required is reduced and the operating cost is reduced with the same total evaporation,the equipment and infrastructure costs will increase[5]. Therefore, the multi-effect evaporation system referred to herein is three-effect evaporator. Design Evaporato The heat exchanger model HeatX in Aspen plus, the separator model flash and the pressure transmission module Valve represent the multi-effect evaporator. Design Condenser In multi-effect evaporation, using the HeatX model in the Aspen plus module library instead. The final multi-effect evaporator system is: Figure 1. Multi-effect Evaporation System. Determine the Convergence Method The current simulation convergence method selects the traditional WEGSTEIN method. Module Parameter Setting The system parameters simulated in this paper are as follows: Table 1. Parameters of the Simulated Plate. HeatX Stream flash Valve Calculation shortcut — — Pressure change parameter Hot fluid outlet gas fraction Flow rate temperature Outlet pressure Hot fluid outlet temperature temperature pressure — — ingredient — — — pressure — — According to the above table, the fluid parameters of the evapora","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91024336","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}

{"title":"CFD Simulation of Symbiotic Disaster Arising from Gas Explosion and Spontaneous Combustion in Longwall Mining Gobs","authors":"Zhen Xing","doi":"10.12783/dteees/peems2019/33940","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33940","url":null,"abstract":"With the increasing of mining depth, the symbiotic disaster of gas and coal spontaneous combustion is gradually increasing. In order to explore the multi-field coupling law of gas and coal spontaneous combustion in the goaf, the numerical simulation method was used to optimize the key parameters and find the best balance between effectively controlling the gas without expanding the danger zone of spontaneous combustion. The results show that, the higher the level of the high-level drainage roadway, the better the drainage effect, but considering the spontaneous combustion period, it is necessary to reasonably calculate the optimal drainage roadway layout position; the buried pipe extraction has good effect on gas control, but it is not conducive to fire prevention.","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79235732","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}

{"title":"Research on Registration Deviation Detection of Printed Glass LED Circuit Board","authors":"Tian Xi, Guo-sheng Zhang, Xiaoqiang Liu, Yang Li","doi":"10.12783/dteees/peems2019/33979","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33979","url":null,"abstract":"To improve the registration accuracy, save the printing material, and optimize the printing space on printed glass circuit board for LED, the dual-cameras are introduced to capture the image of screen-printing plate. Considering the configuration of LED circuit, the dual-cameras are separately used to capture two parts of circuit image with 5mm × 4mm scale, which are from whole circuit with 200mm × 100mm scale. In this paper, the bolding pads are considered as the registration mark, the line fitting with global least square method is used to extract the image character points, and the registration deviation are calculated. According to this detection method, the registration printing experience results that the actual registration deviation ( 13μm in x-direction, 14μm in y-direction) satisfy the registration printing requirement of glass circuit board for LED (less than 30μm in x-direction, and less than 24μm in y-direction). Introduction Silver is used as the printing material in the most printed glass circuit boards that is printed by monochrome screen-printing machine in current. In this way, there is an issue that the silver bonding pad is possibly absorbed by the high temperature soldering, and peeled off from the glass substrate. To solve this issue, gold can be used as the bonding pad overprinted on the silver transmission line, because gold cannot be peeled off from sliver substrate by high temperature soldering. To improve the registration accuracy, it’s important to determine the position and shape of the registering mark. The common registering marks, such as the cross-shape mark [1], CMYK mark [2], independent solid circle mark [3] and star-shape mark [4], require to be printed individually, and occupy the printing space. In common, there is only one single camera in the registration system, therefore, it’s difficult to large the captured image scale and improve the registration accuracy at the same time. The Selection of Registering Mark The screen-printing plate for printed glass circuit board is shown in fig. 1, and the registration printing plate is shown in fig. 2. In this paper, to improve the registration accuracy, the dual-cameras with a resolution of 640 × 480, are applied in the experience device. The center distance of two cameras is 170mm. These two cameras are occupied to capture the field in 5mm × 4mm on the plate. Every pixel in this image is actually corresponding to 7.8μm in x-direction, and 8.3μm in y-direction. To save the printing material and optimize the printing space, according to the character of the circuit shape, the bonding pads are selected to be the registering mark, which is shown in fig. 3. In experience, the model of LED chip is ETi-KB358A-BL. According to the datasheet, the distance between each two bonding pads should be large than 240μm. Therefore, the maximum permission registration deviation should be 30μm in x-direction, and 24μm in y-direction. Figure 1. The printed screen plate for printed glas","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87219419","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}

{"title":"Technological Preparation to the Manufacturing of Thick-Walled Polymer Composite Products","authors":"O. Dmitriev, A. A. Barsukov, A. Dmitriev","doi":"10.12783/dteees/peems2019/33962","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33962","url":null,"abstract":"The paper explores the technological problems that occur in the manufacturing of thick-walled polymer composite products. A detailed causal analysis of technological problems was carried out. We found the most vulnerable stages of the technology and outlined the ways to resolve them based on the method of mathematical modeling and optimization. The method allows to calculate the temperature-conversion fields during the curing of polymer composites and to choose the right optimization strategy of technological process molding.","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88398580","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}

{"title":"Investigation on the Performance of Perovskite Solar Cells Based on All-oxide Charge Transport Layers","authors":"Xiao Zonghu, W. Zhong, H. Ou, Haiyan Fu, Shunjian Xu, Yongping Luo, Chen Liu","doi":"10.12783/dteees/peems2019/34023","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/34023","url":null,"abstract":"A perovskite solar cell with NiO and ZnO as charge transport layers was successfully fabricated. Intramolecular exchange technology was used to improve the morphology of CH3NH3PbI3 thin films. Doping was used to improve the conductivity of the NiO layer. X-ray diffractometer and scanning electron microscopy were used to analyze CH3NH3PbI3 thin films. A solar simulator with a digital source meter and quantum efficiency measurement system were used to test devices performance. The perovskite solar cells with FTO/p-NiO/CH3NH3PbI3/n-ZnO/Ag structure, have optimal PCE of 11.02% and long-term stability at 25 °C and 30 ± 2% humidity. This provides the possibility for the application of perovskite solar cells in the atmospheric environment. Introduction Various countries in the world have stepped up their efforts to develop new energy sources, duing to issues such as the energy crisis and environmental pollution. Recently, a new type of solar cell using an organic-inorganic hybrid halide perovskite as a light absorber has attracted the attention of many scientific researchers, which has the advantages of excellent performance, simple structure, and low preparation cost. The photoelectric conversion Efficiency has increased rapidly from 3.8% [1] to over 25.2% [2] in the past 10 years. The hole-transport materials currently used in such perovskite solar cells are usually organic polymers, such as Spiro-OMeTAD, PTAA [3], P3HT [4], PCBM [5], DEH [6], etc. Among them, spiro ometad device has the best performance, but the price is more expensive, 10 times of gold, which greatly improves the device cost, and the long-term stability of organic materials also needs to be further tested. Therefore, the development of high-efficiency and low-cost inorganic materials has become one of the important research directions of this kind of new solar cells. NiO is a p-type transparent oxide semiconductor with a wide band gap (Eg of 3.6 ~ 4.0 eV) and excellent performance. It has been successfully used as a hole-collecting and electron-blocking layer in dye-sensitized solar cells and organic solar cells. Compared with organic hole materials, NiO-based devices show better stability and comparable conversion efficiency [7]. Compared with TiO2, ZnO has a close band structure and higher electron mobility, which is 100 times that of TiO2 [8]. This enables photo-generated electrons to be more effectively injected into their conduction bands, and to transmit quickly to reduce electron losses and increase photocurrent. In addition, ZnO materials have the advantages of simple preparation, diverse morphology, and high crystal quality. These properties make ZnO the most ideal substitute for TiO2. In this work, NiO was used to replace the expensive and poorly stable Spiro-OMeTAD as the hole transport layer, and ZnO was used to replace TiO2 with low electron mobility as the electron transport layer. A perovskite solar cell with p-NiO/CH3NH3PbI3/n-ZnO simple sandwich structures were cons","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83328897","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}

{"title":"Effects of Pyrolysis Temperature on ZnCl2 Impregnated Corn Straw-derived Biochar Properties and Vanadium (III, IV, V) Adsorption in Aqueous Solution","authors":"Ruihong Meng, Tan Chen, Yanting Liu, P. Lv, Qingshui Hong, Hanwen Guo, Hongtao Wang","doi":"10.12783/dteees/peems2019/33947","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/33947","url":null,"abstract":"In this study, corn straw derived biochars were prepared at different temperatures of 300, 500, 700C, respectively, and the characteristics of corn straw biochars were investigated. Additionally, the adsorption behaviors of vanadium (III, IV, V) on biochars were systematically studied by batch experiments. The absorbents were characterized by ion-exchange capacity (IEC), X-ray Diffraction, N2 adsorption-desorption, and FTIR. The yield of biochar decreases with the increase of pyrolysis temperature. The more ash content is retained, the more alkaline biochar is. The specific area of biochars increased with the rising pyrolysis temperature. With the increase of temperature, the structure became porous and the content of surface functional group elements remained low. Although the content of zinc in biochar is relatively high, the leaching toxicity of biochar does not exceed the Chinese standard. The adsorption capacity of biochars for vanadium (V) decreased under high temperature (700C). In the contrast, The adsorption capacities of biochars for vanadium (IV) and vanadium (III) improved under high temperature. The adsorption mechanisms for vanadium (V), vanadium (IV) and vanadium (III) were surface complexation, which can be proved by FTIR analysis.","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88886499","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}

{"title":"Research on Laser Absorption Spectrum Detection Technology for CO2 and NH3 Regional Emission","authors":"Ying He, Boqiang Fan, Mengqi Li, Zhang Yujun, Kun You, Hao Xie, Dongqi Yu, Boen Lei, Li Xiaoyi, Jian-guo Liu, Wenqing Liu","doi":"10.12783/dteees/peems2019/34004","DOIUrl":"https://doi.org/10.12783/dteees/peems2019/34004","url":null,"abstract":"High-sensitivity emission monitoring of CO2 and NH3 in farmland region is very important for analyzing environment and climate change. The on-line detection technology was studied based on open-path tunable diode laser absorption spectroscopy technology (OP-TDLAS). The detection spectrum of open path was extracted to realize accurate concentration inversion by designing the multi-line fitting algorithm. The system detection stability was evaluated by Allan variance that the detection limit of NH3 and CO2 were about 0.048 L/L and 4.31 L/L respectively. The detection experiment was carried out in farmland of north Anhui to prove that both of the fertilization and straw returning to the field were the emission source of CO2 and NH3 from soil. The growth effect of the former was slower but higher than that of fertilization. This stable spectrum detection method can obtain large-scale concentration results and clear emission rules, which provide technical support for the environment-friendly agriculture. Introduction In recent years, our country has adopted straw returning to the field [1,2] which has changed the physical and chemical properties of the soil in a certain extent and even increased the possibility of CO2 and NH3 emission from the soil. Therefore, CO2 and NH3 emission data in large-scale farmland need obtain by effective and stable detection method to assess its impact on the atmospheric environment, which has become an urgent problem in agriculture and environmental fields [3,4] . Gas monitoring in farmland ecosystem usually adopts box method [5] , micrometeorology method [6-7] and so on. These methods mainly study local soil emissions which are vulnerable to environmental factors, and the requirements to underlying surface and atmospheric stability are high. In recent years, open-path tunable diode laser absorption spectroscopy (OP-TDLAS) technology has been gradually applied for large-scale monitoring. This technology [8,9] continuously measures the gas without sampling and pretreatment. It is more effective to monitor adsorbed gases (such as NH3). Moreover, it has the advantage of fast detection [10] and high sensitivity combined with long optical path technology. Flesch et al. (2007) measured methane volatilization in pasture based on TDLAS technology to verify its measurement accuracy. Todd et al. (2015) carried out ammonia emission monitoring in dairy farmland, and the volatilization rate obtained was 304g·head -1 ·d -1 . Anning Zhu et al. (2012) carried out ammonia emission monitoring before and after nitrogen fertilizer application in Huang-Huai-Hai farmland with TDLAS and BLS technology to obtain the emission rule. At present, there are few reports on effective extraction of characteristic absorption spectrum and improvement of detection stability in open-path detection. In this paper, the multi-line fitting algorithm was designed to realize spectrum detection. Allan variance analysis was carried out to determine the measureme","PeriodicalId":11369,"journal":{"name":"DEStech Transactions on Environment, Energy and Earth Science","volume":"182 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78516456","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}