bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of Safety Factors of Urban Sewage Treatment Plant Based on AHP Method
Authors: Xia Liming , Feng Xiaowei 
Published: August 2019

Abstract
In the process of social and economic development, the process of urbanization is also accelerating. Environmental engineering has become an important task to ensure the urban environment and the quality of people’s living and living, and is also a key link to achieve urban layout optimization. Due to the late start of environmental engineering in China, there are still many problems to be solved. Based on China’s actual national conditions, this paper classifies the identified security risks and builds a safety evaluation index system for urban sewage treatment plants. Finally, the analytic hierarchy process is used to construct the importance model of security risk factors, and the importance ranking of the main security risk factors is obtained.
Numerical Simulation of Pollutants Emitted from Diesel Engine Combustion
Authors: Li Yong 
Published: August 2019

Abstract
Based on the control research of diesel engine combustion emission pollutants, a reasonable numerical simulation study is carried out. At present, hydrocarbon fuel is a common fuel in transportation. Its combustion quality directly affects emissions. Reducing sulfur content and polycyclic aromatic hydrocarbons content in diesel can effectively reduce particulate matter emissions. Because of the poor atomization of diesel fuel, diesel in cylinder cannot be completely burned, resulting in the formation of soot, and diesel additives can increase the degree of combustion completion, and then optimize to achieve the effect of reducing soot. Therefore, the numerical simulation of pollutants is carried out and effective measures are taken to control combustion. The combustion model chosen here is Vortex Cluster Fragmentation Model 20, which is based on turbulent mixing rate.
Research on the Greenhouse Gases Emission Reduction of Pig-breeding Industry in China
Authors: Hu Zhongying 
Published: August 2019

Abstract
Pig-breeding process can emit a lot of CH4, N2O and CO2. The contribution rate of pig-breeding in greenhouse gases emission stands first on the list of all livestock breeds in China. The paper gave the way to reduce carbon emission in pig-breeding industry by the respective of environmental techniques.The results showed that we should use the three biogas products and provide households the chances of taking part in clean development mechanism to promote the scientific treatment of pig waste and to reduce emission finally.
Environmental and resource recovery efficiency assessment of the obsolete mobile phones recycling system
Authors: Xue Nannan 
Published: August 2019

Abstract
Considering environmental protection and resource recovery efficiency, the building of low pollution and high efficiency for recycling system of obsolete mobile phones has been a huge issue. Through system dynamics, the recycling model of obsolete mobile phone is built, which involving the recycling effect under different recycling situations between formal and informal recyclers. The vensim PLE software is used to simulate and assess influence variables in the model. The results show that the formal recycling system can improve the efficiency of recovery and reuse or recycling of obsolete mobile phones.
Analysis of Turbulent Characteristics of Sheared Convective Boundary Layer under Different Shear and Potential Temperature Gradients
Authors: Li Anran , Lin Wenxian , Gao Wenfeng , Liu Tao , Xia Yaowen 
Published: August 2019

Abstract
Effects of shear and potential temperature gradient on the formation mechanism and turbulence characteristics of the sheared convective boundary layer are studied through Large-Eddy Simulation (LES) experiments. Four cases with different velocity difference ΔU of 1.5ms−1 and 3.0ms−1 and different potential temperature gradient Γθ of 0.006Km−1 and 0.015Km−1 were conducted in the horizontal homogeneous atmospheric convective boundary layer of 6000m × 6000m × 2000m. The results show that the formation of the entrainment layer is affected integratedly by the horizontal shear effect and the vertical buoyancy effect, in which turbulence shows strong anisotropy and intermittent characteristics, wherein the mixed layer is dominated by stable small eddies, and the entrainment layer by strip-shaped large eddies. Compared with the pure buoyancy boundary layer, the entrainment flux ratio A

f
is 0.176∼0.385, and the height of the entrainment layer z

i
is shifted to the side with bigger velocity (U
2). ΔU promotes entrainment and Γθ inhibits, especially for the upper limit of the entrainment layer h
2. Obviously, the shear-shelter entrainment phenomenon appears under the weak shear and strong potential temperature gradient.
Research of PM2.5 Prediction System Based on CNNs-GRU in Wuxi Urban Area
Authors: Xie Haofei , Ji Lin , Wang Quan , Jia Zhejian 
Published: August 2019

Abstract
Aiming at the serious pollution situation and lack of effective prediction methods in Wuxi urban area, based on convolutional neural network (CNN) and gated recurrent unit (GRU), this paper proposes a PM2.5 prediction model that can automatically extract spatiotemporal features of multi-station and multimodal air quality data, and build a PM2.5 prediction system based on this model as well. The system model firstly takes multiple two-dimensional (2D) matrices constructed with time series of the air quality factors and weather factors from different monitoring stations in Wuxi urban area as input, automatically extracts and fuses the local variation trends and spatial correlation features of multi-station and multimodal data with CNNs structure. The results from the CNNs are input to the GRU network to further capture the long-term dependence feature of air quality data. Then, a fully connected network taking the spatiotemporal features as input is used to predict the PM2.5 concentration for the next 6 hours in Wuxi urban area. The PM2.5 prediction system based on CNNs-GRU model is tested on the real data set provided by Wuxi Environmental Protection Bureau. On the two test sets in January and June, the prediction accuracy of the PM2.5 prediction system reached 76.902% and 70.053% respectively, which is better than the comparative models. Finally, the prediction system based on the optimal CNNs-GRU model and real-time data obtained by crawlers, predicts the real-time PM2.5 concentration for the next 6 hours, and visualizes the prediction results on the Web through Echarts technology. It can provide valuable reference for citizens’ travel, prevention and control of air pollution in Wuxi urban area.
Research of Air Pollutant Concentration Forecasting Based on Deep Learning Algorithms
Authors: Pan YongMing , Wang YaJie , Lai MingZhao 
Published: August 2019

Abstract
In order to accurately predict the concentration of air pollutants in Shanghai, a prediction model of the concentration of air pollutants in Shanghai based on Wavelet Transform and Long Short-Term Memory (LSTM) was established to predict the concentration of six air pollutants in Shanghai. Firstly, the historical time series of daily air pollutant concentration is decomposed into different frequencies by wavelet decomposition transform and recombined into a set of high-dimensional training data. Secondly, LSTM prediction model is trained with high-dimensional data sets, and parameters are adjusted repeatedly to obtain the optimal prediction model. The results show that the combined model is more accurate than the traditional LSTM model in predicting pollutant concentration.
Analysis of hot topics in soil remediation research based on VOSviewer
Authors: Hu Ya , Sun Zenghui , Wu Dan 
Published: August 2019

Abstract
Through the cluster analysis of the keywords and draw scientific knowledge map by VOSviewer in the field of soil remediation in order to further explore the hot topics of soil remediation research. The results were analyzed by manual analysis. The key words in the field of soil remediation research were divided into 4 topic groups. They are in the field of heavy metal pollution, chemical remediation technology, bioremediation technology, and electric remediation technology. The hot topic in the field of soil remediation research is mainly “heavy-metals”, “removal”, “bioremediation”, “degradation”, “biodegradation”, “phytoremediation”, “contaminated soil”, “water”, “cadmium”, “polycyclic aromatic-hydrocarbons”, “adsorption”, “lead”, and “sorption”, “bioavailability”, “extraction.
Analysis and Evaluation of Heavy Metal Content in Remixing Soil by Feldspathic Sandstone and Sand in Mu Us Sandy Land, China
Authors: Zhe Pang , Juan Li , Qilong Wang 
Published: August 2019

Abstract
In order to ensure the quality of cultivated land with the technology of remixing soil by feldspathic sandstone and sand, the concentrations of eight heavy metals were measured, and the degree of heavy metal pollution in the soil was assessed by Nemerow index and potential ecological risk index. The results showed that, compared with feldspathic, the concentrations of Cr, Ni, Cu, Zn, As, Cd and Pb in the remixing soil decreased by 12.8%, 40.7%, 44.1%, 49.3%, 49.8%, 37.6% and 14.1% respectively. The concentrations of eight heavy metals in sandstone and remixing soil were not significantly different in space, but in sand vary greatly. There was very significant positive correlation among the contents of Ni, Cu, Zn, As, Cd and Pb in the remixing soil, which indicates that the heavy metals have obvious homology. The single pollution index of heavy metals in remixing soil, feldspathic sandstone and sand were all less than one, and the comprehensive pollution index were 0.611, 0.980 and 0.395 respectively. The potential ecological risk index (RI) of heavy metals in remixing soil, feldspathic sandstone and sand were all less than 150, indicating that the soils with three textures showed low ecological risks. After three years of planting, the potential ecological risk index of heavy metals in the remixing soil increased slightly, but the single pollution index was also less than one. The research shows that the remixing soil in Mu Us Sandy Land can ensure the quality of soil environment and the safety of agricultural products.
Design of Intelligent Air Purifier and Indoor Environment Improvement System
Authors: Chen Fengfeng , Hong Xueqiong 
Published: August 2019

Abstract
Smart homes have developed rapidly in the wave of informationization, and Internet of Things water purifiers and air purifiers have gradually entered the families of ordinary people. In order to improve indoor environment, realize the remote control and state monitoring of the water purifier, the intelligent water purifier system is constructed by using the related technologies of the Internet of Things, and the communication and interaction between the hardware device and the APP are completed through the combination of software and hardware programming. An air purification system that integrates infrared remote control and Android mobile phone control, uses STM32 single-chip microcomputer as the control core, and uses various sensors to intelligently detect the indoor environment by using information fusion algorithm. The air purifier adopts an ion decomposition purification method, and the design of the finless device can reduce the loss of the consumables, reduce the growth of bacteria, and have low noise during operation. Experiments show that the purifier can effectively purify indoor air and improve purification efficiency.
Analysis and treatment of Free end vibration of condensate pump motor towards ultra-supercritical 660MW turbine
Authors: Li Wanjun , Li Xiaoxia , Niu Qingliang , Huang Tianqi , Zhang Deke , Dong Yang 
Published: August 2019

Abstract
The motor free end vibrates at rated speed after overhaul of condensate pump; Through collecting field data and checking maintenance records, the fault diagnosis and troubleshooting of A condensate pump motor with excessive vibration was carried out based on the mechanism of vibration, and the cause of the fault was accurately analysed. By taking effective measures such as replacing the expansion joint at the inlet pipe, adjusting the concentricity of the pipes before and after the expansion joint, and adding A safety valve on the inlet pipe, the problem of excessive vibration of the condensate pump motor A has been thoroughly solved, and the hidden danger of equipment has been eliminated successfully.
Analysis on corrugated pipe break in the expansion joint of a turbo-generator set
Authors: Li Wanjun , Yuan Chen , Li Chong 
Published: August 2019

Abstract
In a power plant, the bellows of the lower part of the expansion joint for pumping and heating of the NO.8 turbo-generator unit breaked, and the internal guide plate was teared along the welding seam. Through observation of macroscopic morphology, hardness analysis, metallographic examination, energy spectrum analysis and other means, the corrugated pipe material itself unqualified performance, stress corrosion cracking, corrosion and other reasons were eliminated. According to the micro-characteristics of fatigue fracture and the service environment of the bellows, it is concluded that the main reason of break is the fatigue cracking of the bellows under the impact of the air flow and vibration.
Application of the theory of double actual power generation in run-of-river hydropower stations’ management
Authors: Yang Hongxing , Yang Jinyi 
Published: August 2019

Abstract
The number of hydropower stations is large in China. The parallel industrial benchmark of run-of-river hydropower stations is not significant, for there are quite different characteristics from each run-of-river hydropower station, so it is necessary to study vertical benchmark of the hydropower station itself. Based on this, the theory of double actual power generation is put forward, and the model of vertical benchmark of run-of-river hydropower station is built after analysing the dynamic and convergent characteristics of the theory. After the model is used actually in Duosongduo hydropower station, the rationality of the theory is verified, and the benchmark management effect is remarkable. The theory of double actual power generation has a wide range of practicability and can be generalized. The theory can be applied in the management of various enterprises, groups and families, and can be extended to the management of many quantitative indicators. It has innovation in management and valuable for further study in economics.
The Designed MEMS Methane Sensor Based on Pulse Power Supply
Authors: Shen Guojie , Zheng Xuena , Zhang Yulin , Wang Ruixue 
Published: August 2019

Abstract
As the power too high, the traditional catalytic methane sensor has high wiring cost and quantitative restriction in single circuit. In this paper, a new intelligent methane sensor aimed at low power consumption is designed by using low power MEMS catalytic methane cell, pulse supply mechanism and low power waste circuit. It is observed from the test that the new sensor has low power consumption and well performance.
Analysis on the Retrofit Scheme of a 660MW Unit Heater
Authors: Xue Fangming , Sun Yiqing , Liu Xiuru 
Published: August 2019

Abstract
This paper analyzes the cost and benefit of gas-water heat transfer and gasgas heat exchange scheme by analyzing the retrofit scheme of a 660MW unit heater, and proposes a reasonable feasibility study plan. It can be used as a reference for the unheated wind turbine reconstruction in the southern region.
Research on Optimal Access Location and Capacity of MultiStage Multi-Scenario Distributed Power Supply Based on OpenDSS
Authors: Han Jun , Huang Junhui , Wu Yuefeng , Liu Hong , Xie Zhenjian , Huang He , Gui Sanrong 
Published: August 2019

Abstract
At present, the research on the planning problem of distributed power access distribution network is mostly carried out under the condition that the target annual load is known, and the impact of the differential load growth in different stages and the multi-scenario timing characteristics of the distribution network components are not considered. Aiming at this problem, an optimal access location and capacity calculation method for multi-period and multi-scenario distributed power supply based on OpenDSS is proposed. Firstly, the simulation principle and advantages of OpenDSS are explained from the aspects of model construction and power flow calculation. Secondly, the optimal power supply access model with multiple time slots and multiple scenarios is established with the goal of minimum planning end value. Thirdly, a model solving method based on particle swarm optimization is proposed. Finally, a typical example is chosen to calculate the optimal planning scheme of distributed power supply under multi-period, and the rationality of the model is verified.
Recent Progress of Graphene as Cathode materials in Lithium Ion Batteries
Authors: Meng Xiangyu 
Published: August 2019

Abstract
Graphene, composed by one-atom-thick planar sheet with sp2 bonded carbon atoms, which is regarded as the basis for all fullerene allotropic forms. Its combination with electrode materials (LiFePO4, LiMn2O4, etc.) could dramatically increase the electrochemical performance of the rechargeable battery system. With relative poor rate capability, charge capacity, and cyclability of lithium ion batteries, this review analyses the prospects of graphene materials serve as lithium ion battery electrodes to meet such demands. Some important advances have been summarized, ranging from the synthesis of graphene-based lithium ion battery electrodes to their properties and underlying principles for electrochemical improvement of such materials.
Research on Constructing Integrated Energy System
Authors: Jia Jingzi , Zeng Ming 
Published: August 2019

Abstract
The current situation of energy supply and demand is severe. To solve a series of problems, the target energy system, with the typical characteristics of supply effectivity and synergistic transformation between supply and demand, needs to be constructed. The target energy system, that is, integrated energy system makes full use of supply and demand resources on both sides, and organically combines integrated services and integrated energy to form a coordinated supply subsystem, so as to meet the new energy demand and realize the effective supply of energy. Finally, the paper puts forward three concrete measures to improve integrated energy system construction.
The Influence Mechanism of Power Grid Operation Comprehensive Value from Perspective of Sustainable Energy Development
Authors: Huo Huijuan , Wang Hongjin , Lu Yanchao 
Published: August 2019

Abstract
Safe operation and sustainable construction of a power system can promote economic development and technological progress. A good grid operation system can improve the operation efficiency and input-output efficiency of the whole power system. An index system was built to list criteria of impacting on power grid operation comprehensive value from perspective of investment based on the value creation. A factor analysis method was applied to recognized key criteria. An entropy method was introduced to sort the importance of the key criteria. Based on Chinese data from 2004 to 2017, an empirical study was preformed to verify the framework and explained the impact of key criteria on the power grid operation value. A series of investment strategies and technical means were proposed to improve the power system operation according to the empirical research results.
China’s photovoltaic power generation technology and application
Authors: Li Rui 
Published: August 2019

Abstract
In recent years, with the continuous development of the concept of environmental protection economy and sustainable development, the development of new energy has been widely recognized, and the development of new energy has become a very important measure for the current filling of the energy industry. Solar photovoltaic power generation plays a very important role in the development of new energy. This article mainly describes the advantages of solar photovoltaic power generation technology, explains solar photovoltaic power generation system, explains the principle of solar photovoltaic power generation technology, discusses the advantages of solar photovoltaic power generation and insufficient, and show the current development and application status of solar photovoltaic power generation.
Comprehensive exploration of the development status and future prospects of abandoned wind heating
Authors: An Qiwei 
Published: August 2019

Abstract
As a renewable energy source, wind energy has been rapidly developed in the current exhaustion and lack of energy. However, while wind power construction is developing rapidly, the wind curtailment phenomenon caused by the difficult problem of transportation and consumption is also becoming more and more popular. Seriously, it caused a lot of waste of energy. This paper introduces the background of the cause of abandoning wind and the development status of abandoned wind power generation at home and abroad. Combined with a large number of related researches, it analyzes the prospects of abandon wind power generation operation and evaluates the development prospect of wind power heating. Finally, the development of abandoned wind heating has been prospected.
Main types and applications of hybrid power generation system
Authors: Qing Hao 
Published: August 2019

Abstract
With the development of new power generation technologies, including renewable energy and efficient and clean fuels, combined power generation has become an effective way to reduce environmental pollution and improve energy efficiency. Because different energy forms are naturally strong in time and geography. Complementary, different types of renewable energy combined power generation, can Make up for each other’s intermittent losses of energy and improve the grid. The extent of intermittent renewable energy consumption. Research in many developed countries has matured, but China is still in its infancy. Based on this, this paper introduces the development and research of the combined power supply system at home and abroad, and expounds the main types and applications of the combined power generation system.
Direct wind heating greenhouse underground heating system
Authors: Ma Ji 
Published: August 2019

Abstract
China’s three northern regions are rich in wind energy resources, with annual wind speeds of more than 3m/s reaching 5,000 hours. Traditional greenhouses use coal-fired heating, which has high pollution and low efficiency. Therefore, the system ingeniously combines wind and heating, and proposes a system that directly combines water agitation heating and greenhouse heating to realize the direct conversion of wind energy to thermal energy. The working principle of the system is: when the wind speed reaches the starting wind speed of the wind turbine, the wind turbine blade rotates to drive the stirring device, and the water in the stirring device is heated by the heat, and when the local table temperature is low, the water can be released, and the water is buried. The serpentine pipes in the greenhouse soil heat the soil, and the temperature in the greenhouse will also increase. At the same time, the temperature in the greenhouse is monitored by the temperature control system. If the temperature rises faster, the fluid flow is adjusted to reduce the heat release. Achieve intelligent regulation of greenhouse temperature to maintain its temperature in a suitable range. The system uses a wind-mixing device to use the abundant wind resources in the Sanbei area for greenhouse heating, thereby keeping the greenhouse temperature stable. From the perspective of green and energy saving, it has created an effective way to warm the greenhouse in winter. In the true sense, the consumption of fossil energy has been reduced, and the criteria for appropriate localization and recycling and renewable development have been realized.