bluuebunny/crossref_metadata_2025_split huggingface dataset:
Some features of selection conditions and manufacturing technology for highly efficient thin-film solar cells based on Si
Authors: Olimov Shoirbek , Chen Noufu , Kasimakhunova Anarkhan 
Published: November 2020

Abstract
The main objective of this study is to find the most advanced production technology for semi-voltaic energy converters. The paper presents the results of analysis, production and research of solar cells that have a thin film intersection on Si p- type. The authors also carried out technical analysis of manufacturing and study of heterostructured solar cells of thin layers of crystalline and amorphous silicon. The basic requirements for the production of the most effective light barriers discussed.
The study of the ashes obtained by burning the dry sludge of urban sewage treatment systems
Authors: Cheremisin Alexey , Davydov Roman , Meshalkin Valeriy , Zhuchenko Alexander , Savchenko Ivan , Popovskiy Nikita 
Published: November 2020

Abstract
Currently, the problem of processing various wastes for their further use, such as, for example, sewage sludge, is of considerable interest. The processing itself takes place by burning the sludge to obtain ash, the use of which may further require its additional cleaning from heavy metals. The proposed approach to assessing the composition of ash using a Fourier-transformed infrared spectrometer, express control devices based on NMR and an X-ray spectrometer allows us to qualitatively assess the composition of ash and make informed decisions about its further use, storage and processing.
On possibility of controlling the flow rate and state of wastewater using nuclear magnetic flowmeter-relaxometer
Authors: Myazin Nikita , Dudkin Valentin , Kosolapov Vladimir , Switala Franciszek , Makeev Sergey 
Published: November 2020

Abstract
Currently, one of the urgent tasks in environmental monitoring is monitoring the wastewater state. Wastewater is generated in any technological production, as well as in agriculture as a by-product of production. These wastewaters must be cleaned of hazardous elements before being discharged. Moreover, their condition control is necessary even if the water cycle is closed, i.e. there is reuse after treatment. It should be noted that such wastewater can contain pollution and other production waste which can cause damage to the measuring equipment. In this case, non-contact devices are preferable for wastewater control. The method of nuclear magnetic resonance is one of the promising solutions to this problem. The developed device allows measuring water flow at a flow rate in the range from 0.001 to 1.0 liters per second. In this range, relaxation constants are measured to determine the presence of both dissolved and undissolved impurities, as well as hazardous substances in water. Measurements can be made in the temperature range from 276 to 320 K. All measurements are carried out without contact with the investigated medium. Our work presents the results of such measurements.
Determining the location of an object during environmental monitoring in conditions of limited possibilities for the use of satellite positioning
Authors: Nikolaev Denis , Chetiy Vladimir , Dudkin Valentin , Davydov Vadim 
Published: November 2020

AbstractThe article is devoted to the problem of determining the location of an object in space within the framework of various tasks of monitoring the state of the environment, in conditions of inaccessibility of traditional satellite positioning. As part of the task of monitoring the state of the environment, monitoring agricultural territories and observing the atmosphere, the use of traditional satellite navigation systems in many cases is not available. To solve it, it is proposed to use passive methods for determining the location of the object. To increase their reliability in solving environmental monitoring problems, a new algorithm was developed for the difference-ranging method by increasing the number of used differences of arrival times. The difference between the signal arrival times may be less than 0.02 us. Using the algorithm allowed to abandon the use of the reference station and move on to differences in arrival times between all pairs of stations. In this case, the accuracy of determining the position of the object increases by 20 - 45%. The error in determining the position of the object does not exceed 1 m. This value allows the operational search of weather balloons and other equipment for environmental monitoring.
Changes in soil prokaryotic community structure following pesticide additions to agrosoddy-podzolic soil
Authors: Astaykina Angelika , Streletskii Rostislav , Gorbatov Victor 
Published: November 2020

Abstract
The microbial community is an essential component of the soil ecosystem. The application of mineral fertilizers and pesticides leads to taxonomic and functional rearrangements in the structure of the prokaryotic soil community. Compared with classical cultivation methods, molecular genetic techniques of analysis make it possible to estimate the extent of these changes with a given accuracy. The aim of the work was to study the effect of three pesticides on the structure of the prokaryotic community of agrosoddy-podzolic soil using DNA metabarcoding and metagenomics. With the joint application of three pesticides, the dominance of representatives of the phylogenetic group Proteobacteria is observed in the soil microbial community. When the herbicide of metribuzin is applied to the soil at a 10-fold rate, the proportion of bacteria Flavisolibacter ginsengisoli increases. It was found that when the herbicide, insecticide and fungicide are applied individually, the bacteria are reduced in the number of Mycobacterium madagascariense and Candidatus Nitrocosmicus bacteria. In all variants of the experiment, when pesticides were added, both in the recommended application rate and in the 10-fold rate, an increase in the presence of bacteria Sphingomonas parvus was observed. This indicates a high hydrolytic activity of these bacteria. The established fact can be used in further experiments on the pesticide biodegradation and on the remediation of contaminated areas.
Monitoring complex for concentrator photovoltaic installation with a tracking system
Authors: Shvarts Maxim , Larionov Valery , Pokrovskiy Pavel , Sadchikov Nikolay , Malevskiy Dmitriy 
Published: November 2020

Abstract
The concentrator photovoltaic modules efficiency and their power generation are strongly dependent on the accuracy of their orientation by a tracking system towards the Sun. The more the solar cell power concentration ratio, the more stringent requirements are imposed on the module’s guidance system and tracking accuracy in the direction of the Sun. Effectiveness of the proposed technical solutions for the pair “module – tracking system” is usually verified as a result of the photovoltaic installation continuous monitoring. Such solutions for the specialized complex are presented, which provide for both control over the operating modes of the turning system used for the modules orientation to the Sun and tracking accuracy continuous monitoring, as well as regular monitoring of the modules output parameters in a photovoltaic installation.
Problems of organization sustainable channels for international environmental cooperation in terms of new challenges on the example of the Baltic region
Authors: Asadov Babek , Asadov Eldar 
Published: November 2020

Abstract
The presence of existing potential sources of threat and the emergence of new problem areas inevitably retains the priority of the environmental factor as one of the key foundations for the formation of an approach to regional development. Today, the growing anthropogenic load on the environment makes it inevitable to renew the agenda of international cooperation and harmonize international environmental relations. The authors pay attention to certain aspects of environmental cooperation on the example of the Baltic region, where both the most effective practice of interaction between the countries of the region has been formed, and there are issues of environmental uncertainty. The problem areas have been identified that require not only expanding the boundaries of the application of a responsible environmental policy, but, taking into account dynamic processes and their expected consequences, to find the most acceptable solutions that meet the needs of the region’s countries in ensuring environmental safety.
The development of environmental competence of students through the implementation of the project “Plant wealth of Russia: from region to region”
Authors: Belyakov Nikolay , Nikolina Nadezhda , Belyakova Polina 
Published: November 2020

Abstract
The authors present the main stages and results of the project “Plant wealth of Russia: from region to region”. Project goal is the development of environmental competence and the overall environmental culture of students of educational organizations. The project is focused on the study of the practical application, conservation and protection of plants in the regions of Russia. The project consists of three stages: the project at the local level called “Plant resources of the region’s ecosystem as the main source of healthy nutrition”; regional forum called “Life in the Ecostyle” and all-Russian festival “Plant “ornament” of Russia”. At the end of the festival, a model of the Plant “ornament” of Russia was presented depicting the diversity of plant resources of the participating regions of the festival. Each stage of the project is designed to expand the target audience. In the future, authors plan to implement the project in the format of all-Russian festivals in different regions.
Emulsifiers for reducing viscosity of highly viscous oil from Tahe 10 oilfield
Authors: Sun Xiangyu , Liu Lei , Ge Jijiang 
Published: November 2020

Abstract
The viscosity of original heavy oil increases with the decrease of temperature in the process of wellbore lifting, which makes it more difficult to lift the wellbore for Tahe 10 area reservoir, so emulsification and viscosity reduction technology is studied. The carboxymethyl polyoxyethylene alkyl alcohol ether surfactant containing different oxyethylene chains is an emulsifier with excellent tolerance of high temperature and salt. The researches indicate the compounded system of OPC-20 and DSB at 4:6 can significantly improve the solubility of OPC-20 in high-temperature brine, and it also has a good emulsification performance for Tahe heavy oil.
Analysis of the Impact of Energy Consumption on Economic Growth in Guangdong Province
Authors: Zhang Caihua , Tan Tongxin 
Published: November 2020

Abstract
In view of the importance of energy consumption in economic development, as well as the emergence of energy shortage, high energy consumption, ecological environment damage and other issues in the process of economic development, the relationship between energy consumption and economic growth has attracted the attention of scholars. After analyzing the current situation of economic development and energy consumption in Guangdong Province, this paper selects the corresponding variable indicators, carries out co-integration analysis and Granger causality test, further constructs VAR model to proceed with impulse response analysis, studies the relationship between energy consumption and economic growth, and puts forward the relevant countermeasures and suggestions in accordance with the results of empirical analysis.
Connotation and Benefit Evaluation on Integrated Energy System of Urban Agglomeration
Authors: Tan Xue , Zhao Qiuli , Tian Xin , Wang Yue , Jiang Shurui 
Published: November 2020

Abstract
With the development of ecological civilization construction and regional coordinated development strategy in China, to adapt to the development trend of urban agglomeration, the energy structure will be adjusted and upgraded accordingly. The energy structure has gradually changed from fossil energy to diversified supply mode. The integrated energy system of urban agglomeration will coordinate with energy planning, operation, management and other links, and realize the linkage and complementarity of multiple energy sources. In this context, it is necessary to carry out a systematic analysis of the comprehensive energy system of urban agglomerations. This paper analyzes the connotation, characteristics and function mechanism of comprehensive energy system of urban agglomeration, and constructs a set of evaluation index system. These research ideas and methods can be applied to the scenarios of energy development, utilization and management that adapt to the development of urban agglomeration, and provide scientific analysis tools for energy system management and evaluation.
A brief review on the moisture stability for perovskite solar cells
Authors: Xu Hongming 
Published: November 2020

Abstract
Perovskite solar cells have attracted lots of attention in recent years with the power conversion efficiency increasing from an initial value of 3.8% up to 25.2%. However, its large-scale commercialization still faces various challenges, among which stability issue is the key to this process. Herein, we briefly reviewed the mechanism of perovskite material deterioration in the influence of water erosion as well as several effective strategies reported in recent years to improve the wet stability of perovskite solar cells, such as the composition engineering, surface passivation, dimensional design, etc.
Application of Polymeric microspheres in extra low permeability reservoir in Huabei Oilfield
Authors: Lei Xiaoyang , Zhao Shuhua , Fu Yaxiu , Gu Yujie , Su Huanzhong , Tang Yajuan 
Published: November 2020

Abstract
Aiming at the problems of low water displacement recovery effect in extra low permeability reservoir of Fault-block B10 in Huabei oilfield, the oil recovery technique of surfactant flooding under polymeric microspheres was proposed in this paper. According to the features of polymeric microspheres deep profile control technique, expansion, plugging capacity and migration ability of two samples were evaluated. On the basis of these, a polymeric microspheres matched with the B10 reservoir was selected and tested in the field. Field application indicated that average pressure elevation of each well was up to 4 MPa, corresponding wells efficiency were 88%, comprehensive water was decreased by 6.6% and cumulative incremental oil production was 3350t.
Fault block B10 in Huabei Oilfield had an average porosity of 17.6% and an average permeability of 3.5×10−3μm2. It belonged to a low porosity ultra-low permeability reservoir. The surface crude oil viscosity was 90mPa.s, which belonged to ordinary heavy oil reservoir. Many years of water injection had formed a fixed water flow channel in the formation. The water injection wave and volume were not balanced, and the problem of inefficient or ineffective water injection circulation was becoming more and more prominent. At present, the comprehensive water cut had reached 90%. After surfactant flooding in some well groups, due to the serious heterogeneity of reservoir, displacement fingering was obvious and the implementation effect was poor. As a new type of deep profile control and flooding agent, polymer microspheres can form step-by-step plugging after entering the low-permeability reservoir, and greatly adjust the water flooding flow field and expand the sweep volume [1]. In order to explore the adaptability of polymer microsphere to B10 reservoir, a polymer microsphere suitable for B10 reservoir was selected by static expansion of microsphere and dynamic physical model plugging experiment of core. Field application showed that the polymer microsphere had good adaptability in B10 fault block.
Research on Evaluation System of World-Class Energy Internet Enterprises
Authors: Song Haixu , Li Rui , Li Xiaodong , Tian Guang , Yang Yang 
Published: November 2020

Abstract
The paper analyses the connotation and characteristics of world-class Energy Internet companies. And on this basis, it builds an evaluation index system of world-class Energy Internet companies. The evaluation index system includes four aspects: smart grid platform, superior energy services, steady company operation, and sustainable value creation, which contains 13 secondary dimensions totally. It provides reference and support for companies to accelerate the construction of Energy Internet.
Comprehensive Evaluation on the Removal Performance of Air Cleaners for Indoor Air Pollution
Authors: Yang Rancun , Yin Keke , Xu Peng , Wu Peipei 
Published: November 2020

Abstract
Portable air cleaners (PACs) are widely used as the most effective strategies to improve indoor environment. However, with the indoor air components have become more complicated, the current studies focusing on the removal performance for composite pollutants have been inadequate. Therefore, it is necessary to evaluate the comprehensive removal performance of PACs by mixture that is mainly existed in indoor air. In this study, the initial clean air delivery rates (CADRs) of several best-selling sorption-based air cleaners in Chinese market were calculated with a mixing model. The results indicated that the PACs displayed a reliable performance in improving indoor air quality, especially in terms of particulate matter purification. Furthermore, the removal performance of volatile organic compounds (VOCs) by air cleaners was found to be negatively correlated with molecular weight and polarity of pollutant, and the PACs removal performance for most VOCs was improved by reducing the concentration of particulate matter in indoor air.
Numerical simulation of the influence of water vapor on gas explosions in a high-pressure environment
Authors: Yi Xin , Zou Li 
Published: November 2020

Abstract
Gas explosion seriously threatens the employees security and restricts the safe production of coal mines. Therefore, it is particularly essential to investigate the prevention and control of gas explosions. In this study, a two-dimensional numerical model of a spherical explosion tank was developed to explore the effects of water vapor on gas explosions in a high-pressure environment. Explosion parameters of 10% gas, 1 MPa pressure, and water vapor contents varying from 0% to 8% were simulated using FLUENT software. The results show that the maximum explosion pressure and temperature of the premixed gas gradually decrease with increasing water vapor content, i.e., when the water vapor content is increased from 0% to 8%, the maximum explosion pressure and temperature of the gas mixture decreases from 2.52 MPa and 2092 K under dry conditions to 1.62 MPa and 1714 K with 8% water vapor. The attenuation amplitude is also reduced upon the addition of steam. Water vapor in premixed gas therefore plays a vital role in suppressing gas explosions.
Research on Sustainable Development of Forest Park Tourism Based on ASEB Grid Analysis
Authors: Qin Yu , Huang Yanling , Luo Shengfeng , Miao Yucong 
Published: November 2020

Abstract
In the context of the experience economy, the contradiction between the imbalanced development of tourism and the growing tourism needs of tourists has become a problem to be solved for the sustainable development of forest parks. The tourism experience directly affects the satisfaction and loyalty of tourists and should be valued by park managers. This article selects Gupo Mountain National Forest Park as the research site, explores the current status of the forest park tourists’ experience on the basis of field research, and performs ASEB grid analysis to provide corresponding recommendations for the sustainable development of forest park tourism.
Single Factor Risk Analysis of Reservoir Operation
Authors: qian Li , liang Wang , yujie Su , zhengjie Zhou , lihong Zhang , han Wu 
Published: November 2020

Abstract
The reservoir operation method is used for the storage routing, due to the existence of forecast information errors and other uncertain factors, it may bring risks to the reservoir and its upstream and downstream flood prevention safety. Therefore, the risk analysis is to design and implement the reservoir flood prevention and dispatch the key to the way. This paper introduces a single factor risk analysis method for reservoir operation. Taking Qingshan Reservoir as an example, the risk of reservoir operation using forecast is analysed. The results displayed that taking into account the flood forecast error, when the reservoir adopts the forecast operation method, the risk rate of the reservoir dam body safety.
Study on spatial agglomeration degree of land use in Shanghai
Authors: Yang Guang , Zhong Aijia 
Published: November 2020

Abstract
Spatial agglomeration of land use is the basic factor leading to the formation and continuous expansion of cities, which provides effective support for regional coordinated and sustainable development. In this paper, the status of land use in Baoshan District of Shanghai during the second and third national land survey is used to analyze the location entropy and spatial hotspot, and the change of spatial agglomeration is explored through comparison. The results show that during the period from the second to the third national land survey, the farmland in Baoshan District is scattered, the residential land is concentrated in a small scope, and the industrial land stock is large. According to the characteristics of different land use, relevant policy suggestions are put forward.
Calculation of Loss Amount from Southeast Bay to Southwest Bay
Authors: Yang Dongfang , Zhu Hong , Ling Weifeng , Wang Qi , Li Haixia 
Published: November 2020

Abstract
Applying investigation data about Pb in Jiaozhou Bay in August, 1992 and according to horizontal matter content change model and the vertical matter content change model proposed by the authors, the horizontal loss amount, vertical diluted amount and vertical sediment amount of Pb content in the surface and bottom layers from southeast bay to southwest bay are calculated. What’s more, the model diagram of vertical change and horizontal change of Pb content is designed. The calculation results show that in August in 1992, the absolutely loss amount of Pb content in the bottom layer was 11.03μg/L, and the relative loss amount of Pb content in the bottom layer was 58.42%. Meanwhile, the absolutely increase amount of Pb content in the surface layer was 4.60μg/L, and the relatively increase amount of Pb content in the surface layer was 28.93%. In the southeast bay, the relatively vertical sediment amount of Pb content in the surface and bottom layers was 40.14%, and the absolutely vertical sediment amount of Pb content in the surface and bottom layers was 7.58μg/L. Similarly, in the southwest bay, Pb content in the surface layer and bottom layer had an absolutely vertical diluted amount of 8.05μg/L with a relatively vertical diluted amount of 50.62%. In August, the main sea current carried Pb content through the surface nearshore waters around the bay where many sources of Pb content existed. The law of horizontal loss amount shows that: when Pb content migrated horizontally in the surface layer, Pb content did not lose but increased. However, when Pb content migrated horizontally in the bottom layer, a lot of Pb content was lost due to a long distance. Moreover, the law of the vertical loss amount revealed that Pb content was transported by the main sea current and was relatively high in its vertical migration process. As a result, the vertical sediment amount 40.14% of Pb content in surface and bottom layers was changed to the vertical diluted amount 50.62% of Pb content in the surface and bottom layers when the main sea current flowed from southeast bay waters to southwest bay waters.