bluuebunny/crossref_metadata_2025 huggingface dataset:
Comprehensive Assessment of Explosion Risk of Glass Shower Enclosures Based on Dempster-Shafer (D-S) Evidence Theory
Authors: Li Ying , Han Lei , Lu Xiaowei , Ning Xiuli , Xu Yingcheng
Published: July 2020

In recent years, an increasing number of consumers have bought glass shower enclosures for their homes as their living standards continue to rise. However, despite the convenience the product has to offer, incidents of exploding glass shower enclosures have been arousing wider concerns among the public. This paper is intended to conduct a comprehensive assessment on the explosion risk of glass shower enclosure products based on the Dempster-Shafer (D-S) evidence theory by establishing a glass shower enclosure explosion risk system, so as to provide a reference for reducing the safety risk of glass shower enclosure products.
Trade-Off between Environmental Pollution and Economic Growth
Authors: Zhang Zhiting
Published: July 2020

Environmental improvements and deteriorations are more reflected in a systematically comprehensive issue related to economic production, consumption, energy use and environmental change. To fathom how to effectively control environmental pollution in China’s economic growth process. the article discusses the construction of indicators that takes environmental pollution into economic construction in existing research and points out the imperfection of the environmental efficiency results of various regions in China calculated by these indicators in the existing research as well as proposes that researchers should arise from the perspective of the consumer and recognize the inevitable uncertainty of the emission inventory list when concerning regional environmental efficiency.
Finite Element Analysis of Power Battery Box Chassis of Electric Bus
Authors: Li Jicheng , Cao Xianhong , Guo Lin
Published: July 2020

Power battery is an important part of electric bus. With the standardization of electric bus manufacturing, a standardized power battery has been formed. In this paper, the standardized power battery box chassis of electric bus is taken as the research object, and the finite element analysis method is used to simulate its mechanical characteristics. The results show that the maximum equivalent stress of the battery box chassis is 50.7mpa, which is far less than the allowable stress value of the material. The first six modes have a vibration frequency range of 36.76-246.12Hz, and the frequency distribution of the modes is relatively scattered.
Effect of Activator on Alkali-Slag-Oil Shale Ash Cement under Thermal Excitation
Authors: Wang Dejun , Yuan Kuo , Liu Bo , Qu Zuguang
Published: July 2020

By studying the influence of the content of activator on the strength of alkali-slag-oil shale ash cement under the condition of standard curing after 3 days of thermal excitation at 50°C, the problem that the cement’s 28-day compressive strength is low under the standard curing conditions was solved. The results indicate that the strength of the cement can exceed 42.5MPa, when the amount of admixture of the water glass with 1.10 modulus is no more than 40 ml; or when the density of NaOH is no less than 3.15mol/L, the amount of admixture of NaOH is no less than 5%.
Optimal Dispatching based on Electric Thermal Coupling Characteristics Analysis and Wind Power Consumption
Authors: Feng Zhanwen , Sun Mingyi , Wang Zhonghui , Jin Xiaoming , Zhang Yu , Zhao Bin
Published: July 2020

In winter heating period, in order to meet the heating requirements, the cogeneration unit adopts the operation mode of “heat fixed power”. The peak regulation capacity is poor, and a large amount of wind is abandoned in the period of low load. In view of this problem, the characteristics of cogeneration units are analyzed, and relevant research results at home and abroad are summarized. This paper analyzes the scheme of increasing electric boiler, heat pump and heat storage from the aspects of increasing thermoelectric coupling equipment and power grid lean dispatching, puts forward the method of power grid lean dispatching of thermoelectric cogeneration units, and expounds the practical application of thermoelectric coupling constraint decoupling at home and abroad. At last, the next work of power side and power grid dispatching side is pointed out.
An in vitro self-organized three-dimensional model of the blood-brain barrier microvasculature
Authors: Agathe Figarol , Yasuhiro Naka , Yukari Shigemoto-Mogami , Tomomi Furihata , Kaoru Sato , Matsusaki Michiya
Published: July 2020

The blood-brain barrier (BBB) protects the human brain from external aggression. Despite its great importance, very few in vitro models of the BBB reproducing its complex organization are available
yet. Here we fabricated such a three-dimensional (3D) self-organized in vitro model of BBB microvasculature by means of a combination of collagen microfibers (CMF) and fibrin gel. The interconnected fibers supported human brain microvascular endothelial cell migration and the formation of a capillary-like network with a lumen diameter close to in vivo values. Fibrin, a protein involved in blood vessel repair, favored the further 3D conformation of the brain microvascular endothelial cells, astrocytes and pericytes, ensured gel cohesion and avoided shrinkage. The maturation of the BBB microvasculature network was stimulated by both the CMF and the fibrin in the hydrogel. The expression of essential tight-junction proteins, carriers and transporters was validated in regards to bidimensional simple coculture. The volume of gel drops was easily tunable to fit in 96-well plates. The cytotoxicity of D-Mannitol and its impacts on the microvascular network were evaluated, as an example of the pertinence of this 3D BBB capillary model for screening applications.
Designing Early Warning Flood Detection and Monitoring System via IoT
Authors: Hadi MI. , Yakub F. , Fakhrurradzi A. , Hui CX. , Najiha A. , Fakharulrazi NA. , Harun AN. , Rahim ZA. , Azizan A.
Published: July 2020

Flooding is one of the biggest natural disasters that occurs frequently around the world. It can occur without warning and the after effect of it leaves great damage to the surrounding environment and exposes life threatening to citizen. Therefore, early flood detection and monitoring system with the implementation of Internet of Things and Global Positioning System is proposed in order to reduce the risks that may cause flooding. The aim of this project is to provide the information of a current water level in a drain. When water level increases to a certain level, the system will send a warning notification to users indicating three categories of water level, which are safe, warning and critical level. This system contains an ultrasonic sensor to detect the current water level and at the same time allows users to observe the period of the water level from their phone so that users are more aware of when flooding ought to happen. Moreover, the system consists of a flooding avoidance method that requires the usage of a solenoid as a shutter valve of the drain and water pump to pump out excessive water flow to a suitable place for water release purposes.
Structural, Locational and Environmental Attributes effects the Residential Property Value in Flood Risk Area
Authors: Zulkarnain Siti Hafsah , Yuzir Muhamad Ali , Razali Muhammad Najib , Tarmidi Zakri
Published: July 2020

Abstracts

The arts and science in determining the residential property value make property value has evolved due to the changing in external factors such as economy, environmental and social. This research is aim to determine the residential property value by taking into account the economic attributes that could affect the value of residential property in flood risk areas. The economic attributes consist of structural, locational and environmental attributes involved in residential property valuation in relations with flooding. This paper will discover the significance and effect of each economic attributes in determining residential property value in flood risk area. An extensive review of previous studies in economic valuation of property for different floods disaster studies. It is considered to be the main restrictive factor resulting in lack of empirical studies in this field. Practitioners and researchers will find this study useful in developing an improved understanding of the economic valuation of flooding. The finding reveals that the economic attributes response to floods for a residential property value with positive, negative and none expected effects.
Impact of mercury contamination by artisanal mining on soil and the use of natural zeolite for stabilization
Authors: Budianta W. , Ardiana A. , Andriyani N.D. , Fahmi F.L.
Published: July 2020

Artisanal gold mining (ASGM) commonly found in Indonesia, particularly in Banyumas, Central Java, which is still processing the gold ore by using mercury. The objective of this study to examine the concentration and mobility of mercury contamination on the soil in the study area and to investigate the potential use of natural zeolite for stabilization mercury in contaminated soil. The soil samples were obtained from the top layer and subsurface and then analyzed for mercury concentrations and mobility. Soil stabilization experiment was conducted by using natural zeolite from Gunungkidul, Yogyakarta and the effects of natural zeolites in the reduction of the concentration of mercury was investigated by assessed Jatropha curcas plant. The result shows that the higher mercury concentration was found in topsoil rather than the subsurface. The result of mobility analysis shows that most mercury fractions are associated with organic mercury followed by mercury element fractions. Soil stabilization experiment revealed that adding natural zeolites as soil additives will reduce the concentrations of Hg in plant material which of the important point leading to the entry of mercury into the food chain.
Disaster Risk Index: A Review of Local Scale Concept and Methodologies
Authors: Ramli M W A , Alias N E , Yusop Z , Taib S M
Published: July 2020

Disaster Risk Index (DRI) is a tool for risk identification, risk management and risk exposure which measured at a different level of scales such as global, regional, trans-boundary or local. This paper reviews DRI and its developments at a local scale of nine countries. There are differences in the risk index components used. Some countries from the previous study such as China, Indonesia, Philippines, USA, and Brazil applied World Risk Index (WRI) concept while others use a combination of other risk components to define risk. The paper also reviews the methodologies used in terms of indicators’ weight and the purpose of DRI development. The vulnerability component, which divided into six dimensions for assessment (social, environmental, economic, institutional, physical and economic) mostly focused on the social and physical dimensions. There is a limitation for the WRI concept at the local level in terms of data availability. The indicator used does not represent the local attribute of the countries or the community. Greater focus placed on an integrated approach for the development of DRI at the local level by considering the element of climate risk as an indicator. The development of DRI should consider an integrated approach that is focused on a certain dimension for future research for contribution to Disaster Risk Reduction (DRR).
Carbon Dioxide Adsorption Equilibrium Rates Comparative Temperature Study Using Palm Kernel Shell Sorbent.
Authors: Sahri Dzulkarnain Mohd , Zaini Nabilah , Nasri Noor Shawal , Zain Husna Mohd , Rashid Norhana Mohamed , Noor Shawal Anis Shahirah
Published: July 2020

Greenhouse effect is the serious environmental issue whereby the gaseous component involved is dangerous. One of the gases that contributed to atmosphere is carbon dioxide (CO2), in which is more than 80%, followed by methane and nitrous oxide that resulted from human activities, industrial sector and transportation. Activated carbon (AC) is the best adsorption technology due to simple design and ability to capture carbon dioxide efficiently. This paper was aimed to produce activated carbon derived from waste material, to determine adsorption rate at different pressures and temperatures and to relate adsorption kinetics and isotherms equilibrium to describe adsorption processes. Palm Kernel Shell (PKS) was selected as raw material to produce AC. Char was produced via carbonization process at 700 °C ± 20 °C for 2 h with 10 °C/min heating rate under inert gas flow. The sample is then grinded and sieved to 0.65mm to 0.8mm, followed by chemical treatment by using potassium hydroxide with ratio of 1:1 and directly undergoing microwave treatment. Adsorption rate performances were investigated by different temperatures of 25 °C and 10 °C and pressures of 5, 15 and 25 bar. The sample were characterized by thermo-gravimetric analysis, surface area analysis, and ultimate analysis. AC-PKS shows the highest surface area. As a result, increase in pressure led to increase in CO2 adsorption while decrease in temperature in CO2 adsorption. In conclusion, the findings revealed that the potential of AC-PKS to capture CO2 in order to enhance environmental sustainability and economically.
Characteristics and performance of aerobic granulation seeded with anaerobic bioflocs for treatment of domestic wastewater
Authors: Purba L D A , Abdullah N , Yuzir A , Halim M H Ab
Published: July 2020

In the present study, aerobic granular sludge was developed using a combination of anaerobic bioflocs and activated sludge. The granulation process and removals of organic compound (COD and ammoniacal nitrogen) were observed for 140 days of experimental period. The granulation process occurred after 30 days of the experiments, indicated by the decrease in sludge volume index (SVI) and increase of biomass concentration. The COD and ammoniacal nitrogen removal efficiencies were 67% and 72%, respectively. Mature aerobic granules were developed with diameter ranging from 4 to 6 mm with excellent settling velocity at 75 m/h. The results indicated the possibility to use anaerobic bioflocs as seeding to develop aerobic granular sludge for domestic wastewater treatment.
Production of Liquid Fertilizer from Chicken Feather Waste by Using Subcritical Water Treatment for Plant and Algal Growth
Authors: Zul Syamimi Mohd , Iwamoto Koji , Mohd Rahim Maziahtul Ashikin , Abdullah Norhayati , Mohamad Shaza Eva , Shimizu Kazuya , Hara Hirofumi
Published: July 2020

Chicken is one of the most popular protein sources for majority of the population, and million tons of chicken feathers waste are generated every year in Malaysia. However, it is a potential renewable source because feather is rich in keratin proteins and amino acids. In this study, the chicken feather was hydrolyzed into high value-added organic fertilizers by subcritical water (SCW) technology, and the effect of the SCW organic liquid fertilizer were investigated on the growth of spinach plant and red algae Galdieria sulphuraria. The resulted SCW liquid fertilizer contained 34,200 mg/L of nitrogen and 1,380 mg/L of phosphorus. The agronomic parameters of the spinach plants supplied with SCW liquid fertilizer and commercial fertilizer grew better compared to control plants. G.sulphuraria growth in 2x Allen’s medium with addition of SCW liquid fertilizer, glucose and peptone, respectively was indicated by OD at 750 nm using a UV-VIS spectrophotometer. Thus, the utilization of SCW liquid fertilizer affecting the growth of spinach plants and G.sulphuraria are possibly eco-friendly approach in poultry waste treatments.
Flood Forecasting using Committee Machine with Intelligent Systems: a Framework for Advanced Machine Learning Approach
Authors: Faruq Amrul , Abdullah Shahrum Shah , Marto Aminaton , Che Razali Che Munira , Mohd Hussein Shamsul Faisal
Published: July 2020

Among many natural hazards, flood disasters are the most incisive, causing tremendous casualties, in-depth injury to human life, property losses and agriculture, therefore affected the socioeconomic system of the area. Contributing to disaster risk reduction and the property damage associated with floods, the research on the advancement of flood modelling and forecasting is increasingly essential. Flood forecasting technique is one of the most significant current discussion in hydrological-engineering area, in which a highly complex system and difficult to model. The past decade has been seen the rapid development of machine learning techniques contributed extremely within the advancement of prediction systems providing better performance and efficient solutions. This paper proposes a framework design of flood forecasting model utilizing committee machine learning methods. Previously published works employing committee machine techniques in the analysis of the robustness of the model, effectiveness, and accuracy are particularly investigated on the used in various subjects. It is found that artificial neural networks, hybridizations, and model optimization are reported as the most effective ways for the improved development of machine learning methods. The proposed framework employs four representative intelligent systems as individual members, including radial basis neural networks, adaptive-neuro fuzzy, support vector machine and deep learning networks to construct a committee machine. As a conclusion, this committee machine with intelligent systems appears to be capable of enhancing the designing of flood forecasting model for disaster risk reduction.
Integrated geophysical methods for determination of lithology and unstable slope, case study: Cipogor area, PSK-1 mini hydro power plant
Authors: Prawira G A , Arphan F , Darrian  , Warnana D D , Sugiyono  , Anggrea T O
Published: July 2020

Cipogor is an area in PSK-1 Power Plant located at West Java. This area has a damaged flushing canal due to landslides at 2018. Therefore, integration of two-dimensional resistivity (ERT), one-dimensional resistivity (VES), and Digital Elevation Model is conducted to determine lithology and unstable slope that characterized by water saturated weak zone. Resistivity models from ERT and VES method are integrated with elevation data from DEM. Lithologies from interpreted VES model are as follows: Alluvial (6 – 70.06 Ωm), Tuff sediments (12 – 28.44 Ωm), sandstone sediments (1.96 – 9 Ωm) and Breccia (42.07 – 88.6 Ωm) from Koleberes Formations. There is an anomaly (12 – 28.98 Ωm) within sandstone layer. From ERT model, there is low resistivity zone (2-5 Ωm) interpreted as weak zone and moderate resistivity zone (16-24 Ωm) around 9-17 m in depth, interpreted as sediments transported during previous landslide. From the interpretation, it can be concluded that there is weak zone in depth 5-6.91 m and 17-20 m which is a weathered sandstone of Koleberes Formation and a sediment layer that transported from previous landslide in depth 9-17 m. Heaving is occurred in this layer and preventing any large landslide to occur but cannot prevent soil creeping in the area.
Study on Optimization Design of Ground Source Heat Pump System with Horizontal Spiral Pipes
Authors: Su Shunyu , Wu Rui
Published: July 2020

How to solve underground soil thermal balance problem is important for ground source heat pump system. Basing on the experiments of a ground source heat pump system with horizontal spiral pipes in Wuhan, the operation controlling strategies of intermittent operation and continuous operation in this system were studied in this paper. The temperatures of inlet and outlet water in the underground heat exchanger, and soil temperatues around the buried pipe were tested. And these temperaure changes in the intermittent operation and continuous operation are compared and analyzed. The results show that soil temperatures around the buried pipe will recover quickly in the testing intervals of intermittent operation. Intermittent operation has advantages over continuous operation for this ground source heat pump system. It provided the designers of ground source heat pump system with beneficial information about underground soil heat accumulation.
Application of vegetable oil amide derivatives in oil field pipeline anticorrosion
Authors: Zeng W G , Lv Y H , Hua Z Z , Wang H , Xu D X , Xu M
Published: July 2020

Based on rapeseed oil and soybean oil, and diethylenetriamine and formaldehyde, a plant oil derived amide inhibitor was synthesized. The inhibition performance of plant oil derived amide inhibitor on A13 steel in 1 mol / L hydrochloric acid was studied by weight-loss experiment, electrochemical analysis and quantum chemical calculation. The adsorption behavior and mechanism of the inhibitor on A13 steel surface were revealed. The results of electrochemical experiments were consistent with the results of weight loss tests. The contact angle test results showed that the plant oil derived amide inhibitor can significantly enhance the hydrophobicity of A13 steel surface. The thermodynamic parameters show that the adsorption of plant oil derived amide inhibitor on A13 steel surface was self. The results of quantum chemical calculation showed that there are a lot of active sites in the structure of amide inhibitor derived from vegetable oil.
Hardware-in-loop test platform design for AVC sub-station of the new energy station based on RT-LAB
Authors: Wang Nan , Zhao Wei , Sun Shumin , Cheng Yan , Wang Yuejiao , Xing Jiawei
Published: July 2020

In order to ensure the safe and stable operation of the large power grid with high proportion of renewable energy access, the automatic voltage control (AVC) system of the new energy power station is very important. The control strategy of the AVC and the response characteristics of the voltage and reactive power regulating equipment will affect the AVC regulation effect directly. However, the pure digital simulation software cannot simulate its actual response characteristic. This paper established a hardware in loop (HIL) testing platform based on RT-LAB real-time simulation system. The real AVC controller and the real static var generator (SVG) controller hardware are connected to RT-LAB testing platform via I/O physical interface and MODBUS communication, and the HIL coordinated simulation testing scheme is studied based on FPGA of RT-LAB. With established testing platform, the voltage regulating characteristic and reactive power replacement capacity of AVC control strategy is verified.
Low-voltage cold-start circuit for energy harvesting suitable for indoor sunlight
Authors: Pan Jiaju , liu Xinning , Yu Dengbang
Published: July 2020

This paper proposes a low-voltage cold-start circuit suitable for indoor sunlight energy harvesting in TSMC 40nm CMOS process. The circuit can work normally when the input voltage is as low as 200mV and is compatible with a wide input power range. Pulse-skipping modulation (PSM) is used to control the circuit’s operation and sleep. The main structure includes a ring oscillator, a two-phase clock drive circuit, a linear charge pump, a low-power voltage reference, and a hysteresis comparator. Compared with other cold-start circuits, the structure proposed in this paper can realize the function of voltage rise without the aid of external machinery or voltage. Simulation results show that when the input voltage is in the range of 200mV to 700mV, the cold-start circuit can stably output 800mV to power the subsequent circuit.
Simulation analysis of Henan Province’s rising path under the background of energy revolution
Authors: Jinhui Zhao , Chaopeng Zhang
Published: July 2020

In order to study the restriction and promotion relationship of the energy revolution to the rising provinces in central China-Henan Province, this article builds an energy revolution consumption model based on the multi-dimensional development data of Henan Province from 2010 to 2018, and predicts Henan’s GDP growth from 2020 to 2035, energy demand, changes in primary energy structure, and CO2 emissions. The results show that: under the scenario of rapid economic growth, the total GDP of Henan Province in 2035 is 11561.1 billion yuan; in the scenario of benchmark growth, the total GDP is 11018.5 billion yuan. The path of high-quality rise in Henan Province may be between SE21 and SE25. In 2035, the proportion of renewable energy will increase to 24.4%. The peak of Henan’s carbon emissions may appear in 2021, with total carbon emissions between 49.577 million to 50 million tons. Based on the above data, Henan Province should take the road suitable for the development of regional energy revolution and promote the high-quality rise of Henan Province.
Nitrogen and oxygen co-doped broccoli-like porous carbon nanosheets derived from sericin for high-performance supercapacitors
Authors: Shi Xing-Yu , Xue Wei-Dong , Wang Wen-Jian , Zhao Rui , He Dong-Xu
Published: July 2020

Broccoli-like porous carbon nanosheets with high levels of heteroatoms doping was successfully synthesized from the wasted sericin via an environmental friendliness and cost-effective strategy. The hierarchical porous carbon nanosheets was formed from chemical expansion and activation by Mg2(OH)2CO3·xH2O simultaneously. Benefiting from the elaborate structure of NPCN-4, the prepared material shows the satisfactory energy storage ability in electrical double-layer capacitors (EDLCs) area with an outstanding specific capacitance of 214.5 F g−1 at 0.5 A g−1 in an alkaline solution and high capacitance retention of 87% at 10 A g−1 after 10000 cycles.
A Method of Optimal Malfunction Management in Urban Natural Gas Transmission and Distribution Systems
Authors: Lv Xiaodong , Ding Hao
Published: July 2020

Given the increasing number of urban natural gas transmission and distribution systems, it is particularly crucial to optimize the management of natural gas operations, especially when equipment failure or pipeline leakage occurs in the supply system. To meet the needs of customers for natural gas, in this paper, we considered two cases of pipeline rupture leakage and pressure regulation station failure for different supply areas. We combined natural gas supply pipelines, pressure regulating stations and a gasholder station to establish a failure optimization management model and used genetic algorithms and one-dimensional fluid dynamics models for optimization management and proposed the following two solutions: 1. Complete operation strategy: modify both the pressure of the pressure regulating station and the air supply volume of the gasholder station; 2. Partial operation strategy: modify the pressure of the pressure regulating station only, and keep the supply volume of the gasholder station constant. Finally, our model is applied to an urban natural gas transmission and distribution system. Based on the actual results, failure optimization management is proposed according to the location and the type of failure and constructive options are suggested for the operation of natural gas networks.
Design of Central Air-conditioning Partition Scheduling System Based on WLAN Positioning
Authors: Zhang Yansong , Wang Yong , Yuan Bowen
Published: July 2020

A partition scheduling system of central air-conditioning based on Wireless Local Area Network (WLAN) positioning is designed. The system can quickly update the personnel density of the partition by WLAN positioning algorithm, and obtain the actual load by integrating the temperature and humidity and the surrounding partition information. Therefore, the rotating speeds of the fans and water pumps of the air conditioning in this area are automatically adjusted, so as to realize the intelligent scheduling of the air conditioning in different areas based on personnel density. At the same time of regional differentiation, the overall cooperative operation can truly achieve the energy-saving effect of distribution on demand.
Improvement on Anti-cavitation Performance for a 120 MW Kaplan Turbine
Authors: Li Yunzhe , Liu Qilin
Published: July 2020

The model test results show that the initial runner developed for LB HPP has the problem of clearance cavitation, which does not meet the design requirements of no cavitation in the whole operating range. In order to find out the reasons of clearance cavitation, and put forward the corresponding optimization method, the numerical simulation method is used to calculate the clearance flow inside runner on the basis of the entire passage calculation. By analyzing the pressure distribution on blade surface and the flow characteristics inside runner blade clearance, the reasons of clearance cavitation have been found, the initial runner blade has been optimized, and the secondary model test has been carried out. The results of the secondary model test show that the optimized runner blade can meet the design requirements.
Model test of pumping operation of Sanhekou hydro-junction project
Authors: Wu Yajun
Published: July 2020

Aiming at the pumping operation of Sanhekou Hydropower Station’s pump-turbines, based on model tests, data measurements were performed on the rated speed and variable speed pumping operations. In addition, the efficiency test and hump margin test were implemented, and the corresponding performance curves were obtained. The results meet the engineering design requirements and can provide technical guidance for the speed control of the power station.
Dynamic reconfiguration of distribution network with new energy generation considering economic and reliability
Authors: Hao Tian , Li Lu
Published: July 2020

The penetration rate of new energy power generation in the distribution network has gradually increased, and the traditional static reconfiguration for a certain time section will be difficult to meet the actual operation requirements of the distribution network. A dynamic reconfiguration model of the distribution network with network loss, voltage offset, and new energy abandonment rate as the optimization goals was established. An adaptive genetic algorithm was used to solve the dynamic reconfiguration optimization of the distribution network. By simplifying the traditional network, a large number of infeasible solutions generated during the encoding process are reduced, and the optimization ability of the algorithm is improved. Based on the IEEE33 node system, four different scenarios were set up for simulation analysis. The results show that the reconfiguration can significantly reduce the network loss and voltage offset of the system, and also significantly improve the utilization efficiency of new energy and effectively improve the operation level of the distribution network. The feasibility and correctness of this method were verified.
Research and Application of 5G Technology in Power System
Authors: Huan Li , Lishuai He , Di Gai , Fanbo Meng , Dongdong Wang
Published: July 2020

5G, as the cutting-edge technology of wireless network access, it has the advantages of high-speed, low delay, high-density access and slicing function. Combined with the data transmission of intelligent equipment in the substation, it can greatly improve the wireless network access ability of intelligent equipment and sensing unit. For the purpose of improving the intelligent inspection ability of the substation and provide the communication foundation for the big data analysis of the operation state of the substation equipment. we can build a high-density, high bandwidth, low delay wireless network platform through 5G wireless communication network. According to the business requirements, the system can realize the rapid state perception and IOT interaction of data sensors in the transmission terminal layer. With all communication and data transmission requirements satisfied.
Research on the integration development of sports intangible cultural heritage and national fitness
Authors: Guo Chuan-yan , Xu Shi-jun , Luo Ge
Published: July 2020

This paper explored the integration and development of intangible cultural heritage sports and national fitness from the perspective of organization. The research shows that the intangible cultural heritage of sports based on folk custom and tradition can enrich people’s spiritual and cultural life and the content system of national fitness. The construction of national fitness system with Chinese characteristics is helpful to protect the intangible cultural heritage of sports. Conclusion: We should strengthen the construction of grass-roots sports organizations, improve the degree of organization, explore the sports methods in line with national conditions, and organically integrate the protection of sports intangible cultural heritage with the national fitness system.
Influencing Factors of Grain Farmers’ Application Behavior to Adopt Organic Fertilizer from the Perspective of Heterogeneity—Based on The Empirical Study of 512 Farmers in Sichuan Province
Authors: Xiang W J , Chen J P , Fu X H
Published: July 2020

Based on the survey data of 512 households in Sichuan Province, this paper uses the binary logistic model to analyze the influencing factors of organic fertilizer application behavior of grain farmers in the perspective of heterogeneity. The study shows that the organic fertilizer application behavior of grain farmers is a complex decision-making behavior under the interaction of various heterogeneous factors. In terms of human capital, grain farmers who are young, highly educated and have a large family labor force are more likely to apply organic fertilizers; in terms of economic capital, grain farmers with high household income and high proportion of agricultural income are more likely to apply organic fertilizer; in terms of social capital, grain farmers who joined farmers’ specialized cooperatives and received training on organic fertilizer and had some family members who have served as village cadres prefer to apply organic fertilizer. In terms of natural capital, the large scale of cultivated land and the low degree of fragmentation of cultivated land are conducive to promoting the application of organic fertilizers to grain farmers.
Economic Feasibility and Comprehensive Benefit Evaluation of Rural Household Biogas Utilization: Evidence from China
Authors: Xia X M , Wang F
Published: July 2020

It is of great significance for the scientific formulation or adjustment of rural energy policy in the new era to explore the current situation of rural household biogas utilization and make a comprehensive evaluation of the benefits of biogas and its derivatives. Based on the field survey data of Qionglai, Sichuan Province, this study uses AHP to build a comprehensive evaluation index system, uses financial indicators to calculate the economic benefits of household biogas, and establishes the weight and score of the index system to comprehensively evaluate the economic, ecological and social benefits of biogas and its derivatives utilization in the survey area. The research results show that the economic benefits and social benefits of rural household biogas are good, but the ecological benefits are not up to the ideal level. Under the background of rapid development of new rural construction and urbanization, the government still needs adjusting policies, so as to meet the challenges of structural changes in the domestic energy consumption market.
Research of present status and development suggestions regarding the carbon capture, utilization and storage
Authors: Zong Jianfang , Sun Liang , Bao Wei
Published: July 2020

The carbon capture, utilization and storage (hereinafter referred to as “CCUS”) technology has already been widely regarded as an available method of great potential for carbon dioxide emission reduction. As predicted, the emission reduction contribution will rise from 3% of the total emission reduction amount in 2020 to 10% in 2030, and to about 20% in 2050, which becomes the individual technology of the greatest contribution to the carbon dioxide emission reduction. This paper illustrates the main links of CCUS technology: the carbon capture process, carbon transport, carbon utilization and carbon storage. This paper introduces the storage methods of carbon dioxide, the geological storage and marine storage. In addition, this paper also analyzes the main storage practices both at home and abroad, the major overseas storage projects and the present status and progress of China’s storage. In addition, this paper also discusses the main challenges encountered by China’s CCUS development, and proposes the ideas and policy suggestions that promote China’s CCUS development.
The degradation of molybdenum disulfide nanomaterial via activated persulfate and radical species
Authors: Xu Dongfang , Tan Huiwen , Wei Yongpei
Published: July 2020

Chemical stability of molybdenum disulfide (MoS2) is important for its application in catalysis fields, and related research is scarce. Herein, two types of catalysis system, activated persulfate (PS) and radical species (generated from g-C3N4 photocatalyst or decomposed from H2O2) were simulated to study the degradation of MoS2 in catalysis process. We found that MoS2 degraded partly via both of activated PS and radical species. Graphene activator of PS showed more significant degradation to MoS2 than Fe activators of PS under dark, which may due to its higher surface area and more active sites on the surface. Light irradiation enhanced the degradation of MoS2 in activated PS system with Fe activators, increased activation of PS under light irradiation. Radical species decomposed from H2O2 degraded the MoS2 under both dark and light. g-C3N4 photocatalyst could degrade MoS2 by generating radical species. Overall, these results showed that the application of MoS2 should be concerned due to its degradation in catalysis process.
Analysis of Offshore Oil Spill Pollution Treatment Technology
Authors: Li Kai , Yu Hongliang , Yan Jin , Liao Jianbin
Published: July 2020

In recent years, human demand for petroleum resources has been increasing, the exploitation, transportation, and use of offshore oil have also led to frequent offshore oil spills pollution accidents. Once an oil spills accident at sea occurs, it will not only cause waste of petroleum resources and produce economic loss, but also cause great damage to the marine ecological environment. This article reviews the hazards of offshore oil spills pollution, the ways of oil spills, the physical, chemical, and biological treatment technologies of oil spills and gives the prospect.
Study on the Population and Effect of Fish Passing Through the Fishway in Cao’e River Gate
Authors: Hui Yin , Fuqing Bai , Xinchuang Cheng , Xinsheng Che , Yueshu Sun , Rong Wang
Published: July 2020

Fishway is one of the important ways to solve that gate dam obstructs fish migration. Through the monitoring and sampling of the right bank fishway of the Cao’e River Gate during May to November 2019, a total of 27 species of nektonic organisms were captured, totaling 2,926, belonging to 10 orders and 15 families, including mostly coilia ectenes, secondly minnow and others (crucian carp, bighead carp, silver carp, carp, and lateolabrax maculatus, etc.); the average species diversity index of nektonic organisms is 2.278, the average species richness index is 1.704, the average uniformity is 1.12, and the average dominance is 0.728. The data show that the effect of fish passing through fishways in different seasons, hydrological conditions, and weather conditions is very different. In general, the number of fish passing in spring and summer is much higher than that in autumn and winter. Of which, the number (individuals accounted for 91.41% of all) monitored in May, June, and July far exceeded that in other months. From May, the species and number of fish passing gradually increased, and by July, they reached their peak. Comparing the historical monitoring data in this region and the effects of fish passing through other typical fishways at home and abroad, the Cao’e River fishway provides a channel for the exchange of upstream and downstream fish of the gate, becoming an important channel to resolve the migration of blocked fish. It is recommended to strengthen the long-term monitoring and study of fishway, providing scientific basis for the collection of fish fry by opening the sluice gate, and also laying the foundation for further evaluation of the fish-passing effect of the sluice dam project in the Yangtze River Delta.
Application of Dynamic Sarma Method to Stability Analysis of Rock Slope
Authors: Zijie Wang
Published: July 2020

In this paper, the shortcoming of Sarma method, a slop safety factor calculation method based on pseudo-static method, are improved by adding real seismic force, calculating acceleration amplification coefficient of each block by using numerical simulation and drawing the time-history of safety factor by using matlab software. The dynamic Sarma method is proposed. Through the calculation of an example, the rationality of the calculation result of slope safety factor by using dynamic Sarma method is verified.
Current Status of Technology and Standards of Sludge Recycling in China
Authors: Xiaoxin Zhang , Jin Huang , Ling Lin , Sinan Zhang
Published: July 2020

This paper sorts and analyzes current states of technologies and standards, existing problems and demands of the sludge recycling industry in China, in order to further promote the establishment of sludge recycling standard system in China, standardize key technologies, devices and processes of efficient sludge recycling, and promote the application and utilization of advanced technical equipment, thus providing solid technical support and guarantee for the enhancement of overall performance level and pollutant up-to-standard emission of sludge recycling industry in China.
Application of Mathematical Model in Water Conservancy Project at Confluence Section
Authors: Deng Chun-yan , Xia Jun-qiang , Ge Hua , Long Rui
Published: July 2020

The new construction of the wading project at the confluence section, where the flow condition is rather complex, has definitely to take more influencing factors in consideration. In order to investigate quantitatively the effect of secondary flows on the transport of flow and sediment in a sharply curved channel, the landscape project at the Yibin reach was taken as an example, and the 2D Mathematical Model was used to simulate the distributions of flow factors. As the predicted project is located at the confluence of the Three Rivers, the left banks of the Minjiang River and the Yangtze River, the complexity of the inflow and outflow conditions was considered during the study, and different research schemes were compared. Result of this research can be valuable reference for similar projects.
Research and Application of Green Filling MiningTechnology for Short Wall Mining in Aging Mine
Authors: Pengde Sang
Published: July 2020

In view of the problems of “three lower” coal pressure in Dongping Coal Industry and the difficulty in moving villages and the exhaustion of mine resources, it is necessary to explore new mining techniques to realize the sustainable mining of existing coal resources. By means of theoretical analysis, laboratory test and field measurement, the paper puts forward the continuous green filling mining technology. The working face layout, filling material ratio, branch and lane parameters and surface deformation law were studied. This method has been used in the experimental mining of No. 15 coal seam of Dongping Coal Industry, and has obtained great economic and environmental benefits.
Influence of Moisture in Flue Gas after Wet Desulfurization on the Measurement of SO2 Concentration
Authors: Liu Y , Shu Y , Zhang C , Long H Y , Deng S , Wang F , Tian G
Published: July 2020

Wet desulfurization is dominant in China’s coal power industry as flue gas discharged from wet desulfurization is over-saturated, includes lots of moisture, and can bring huge interference to the measurement of SO2. When using existing SO2 measuring methods, especially wet desulfurization technology aiming at ultra-low emissions, it is necessary to take into account the impact of water in flue gas. The pH value of condensate water of flue gas after desulfurization with limestone gypsum wet desulfurization is 2, lower than that of desulfurizing slurry, indicating that some SO2 has been dissolved in the water carried by flue gas after desulfurization. In order to avoid the interference of water, infrared online continuous emission monitoring system (CEMS) is equipped with a water removal device. When a conventional condensate water removal method is applied, condensate water will dissolve SO2 and then lead to the relatively low concentration of SO2 in the flue gas measured. When a proper water removal method is adopted, it can effectively avoid the measuring error as a result of SO2 dissolved in condensate water.
Bioremediation of Crude-Oil Polluted Soil Using Immobilized Microbes
Authors: Zuo Lei
Published: July 2020

Microbial bioremediation technologies in the past usually cannot degrade the corrosive pollutants in the polluted soil. These microbial bioremediation technologies are often impacted by many environmental factors, and therefore the remediation effect of these bioremediation technologies on the polluted soil is reduced. With the advance of science and technology, more advanced immobilized microbial remediation technologies are developed. These technologies have been growing rapidly due to their advantages over the old microbial remediation technologies. This paper investigates and researches the immobilized microbial and other remediation technologies, and the results show in the process of remediation of polluted soil using immobilized microbes, that the activity characterization of enzyme and the number of bacteria are both relatively higher. Moreover, this paper provides the detailed statistics on various factors that impact the effect in remediating oil polluted soil using immobilized microbial remediation.
Simulation Analysis of Safe Evacuation in a Railway Tunnel Emergency Rescue Station
Authors: Qi Li , Xiongzhi Cao , Xiaoling Xiong , Chang Yang
Published: July 2020

This paper in order to improve the design parameters of evacuation passageway of emergency rescue stations in long railway tunnel based on the principle of the minimum evacuation time and best evacuation route, and study the impact of evacuation speed on evacuation time due to personnel panic. The evacuation time in different combinations of parameters of spacing and width of evacuation passageway and width of platform is calculated by Pathfinder simulation software considering characteristics, speed and path of evacuation. The simulation takes the fire accident of 18 marshalled passenger trains in an emergency rescue station in tunnel as an example. The study results show that: 1) Due to the panic mentality, the evacuation speed will increase, so the population flow rate will increase and the evacuation time will be shorter. 2) The optimal distance for the evacuation passageway of the emergency rescue station is 50m, the optimal width is 3.5m, and the platform width should not be less than 2.5m.
Effect of turbulence on aerodynamic coefficient of cylinder
Authors: Yao Jianfeng , Shen Guohui , Lou Wenjuan
Published: July 2020

This paper was concerned with the wind flow around a circular cylinder with various wind velocities (ν) and turbulence intensities (I). Wind pressures were measured through wind tunnel tests, by which drag coefficient (CD
) and lift coefficient (C
L) were calculated. The values of drag coefficient varies with the Reynolds numbers (Re) and turbulence intensities of incoming flow, and there exists a significant difference between steady flow and turbulent flow in drag coefficient in subcritical Reynolds numbers. An unstable separation bubble appears on one side when flow changes from the steady situation to the turbulent situation. Turbulence intensity affects the spectral density distribution of drag coefficient a lot.