bluuebunny/crossref_metadata_2025_split huggingface dataset:
ETV analysis of earthworm composting technology in municipal sludge
Authors: Wang Lin , Wang Desheng , Wang Yuanfei , Zheng Guoxia , Wang Milan , Liu Zhiguo 
Published: July 2020

Abstract
Earthworm composting technology can reduce the excess sludge of sewage treatment plant and treat it with resources. According to the procedure of environmental technology verification, this paper tests and analyzes the environmental protection effect and environmental impact of earthworm composting technology scientifically, objectively and fairly. The results showed that the concentration of heavy metals and the number of fecal coliforms in earthworm dung met the limit requirements of the “Organic Fertilizer“(NY 525-2012), and the moisture content, organic matter concentration and total nutrients in earthworm dung did not meet the limit requirements of the “Organic Fertilizer”(NY 525-2012), so it was not suitable to be used directly. It is used as an organic fertilizer, and the mass reduction rate of the mixture after earthworm composting is more than 45%; the sludge treatment capacity (dry weight meter) of the process is 0.24 kg·m−2·d−1, the yield of earthworm dung (dry weight meter) is 0.06 kg·m−2·d−1, and the yield of earthworm (dry weight meter) is 0.02 kg·m−2·d−1. The reduction effect of earthworm composting process on organic waste (sludge and straw), the concentration of heavy metals and the number of Fecal coliform, all the indicators can meet the verification statement of the enterprise.
Overview of the application of active noise control technology in the indoor acoustic environment
Authors: Dong Junyan , Fu Yupi , Zheng Bomin , Li Kechao , Qu Jichen 
Published: July 2020

Abstract
Passive noise reduction technology is not enough to improve the acoustic comfort of the indoor acoustic environment. This paper discusses the application prospects of active noise control technology in the indoor acoustic environment, studies the principle and development status of active noise control technology, describes the determinants of the effect about the active noise control and the application prospects in the indoor acoustic environment, and points out the current problems to be solved in the research and future research directions.
Mitigating air problems and producing renewable energy with solar downdraft tower
Authors: Yang Liu , Li Zhou 
Published: July 2020

Abstract
Over the past three decades, China, especially in the megacity areas, has suffered from air pollution and heavy haze with its decades-long burst of economic growth and rapidly expanding clout as an industrial giant. The important two elements of air pollutant in China are the fine particles (PM 2.5-PM 10) and non-natural greenhouse gases. To overcome these problems, in this study, we propose a novel inversion solar chimney approach for mitigating the air pollution and haze problems in the megacities of China by using water to scavenge air pollution through spraying water into the atmosphere. For a water drop floating in air or falling through air, the sensible heat of air would transfer to the latent heat of droplets and will cause a decrease in drop size. In a quite short transient time, the droplet evaporates and cools down to air ‘wet-bulb’ temperature. The Direct air capture devices (DAC) are installed at the bottom of the solar downdraft tower to reduce the CO2 in the atmosphere.
Research on Energy Conservation for Industry in China
Authors: Liu Ren , Wang Zhonghang , Chen Haihong , Yang Jie 
Published: July 2020

Abstract
The period of “the 13th Five-Year Plan” will be a decisive stage to build the moderately prosperous society and achieve the first “Centenary Goal”, and a critical period to promote overall economic transformation and upgrading and embark on the new industrialization road. New development stage and idea will have a profound influence on Chinese economy, society and culture, from which a comprehensive and profound transform is being fostered. Building the modern, high-end and low-carbon industrial development pattern in line with Chinese benefits should be necessary to create the economically-upgrading and industrially-transformed development in China. Industry, as the most important department for energy consumption in China, has been the priority for promoting energy consumption reform and energy conservation and emission reduction in China. How to make further progress by virtue of transformation development of the industry is also an important proposition to be faced.
Vulnerability Assessment of Regional Water Resources
Authors: Chang Leran , Chen Ganqin , Cao Shengle , Zheng Congqi 
Published: July 2020

Abstract
This paper established the regional water resources vulnerability impact factor system by selecting the impact factors and screening out the key factors based on principal component analysis and DPSIR model. Then combing with multipolar fuzzy pattern recognition model and improved fuzzy clustering iterative model, the regional water resource vulnerability assessment model was proposed. Taking Jinan city as an example, the results of water resource vulnerability assessment from 2000 to 2016 show that the water resource status of Jinan city has gone from bad to good, then to worse, and finally slowly getting better.
Power purchase optimization strategy of State Grid Zhejiang Electric Power Co., LTD.
Authors: Tang Chenghui , Xu Yu , Fang Jianliang , Jiang Wei , Zhang Fan 
Published: July 2020

Abstract
During the marketization process of electricity purchase and power generation, some users such as urban and rural residents still purchase power from the power utility, which don’t need or are not ready to participate in the market. To meet the power demand of these users, grid utility need to purchase power from the units that belong to priority power generation. This part of power purchase of grid utility should ensure reasonable returns under the requirements of the policy. The power purchase optimization strategy of State Grid Zhejiang Electric Power Co., LTD. is proposed in this paper, which is consistent with the current situation and reform background in Zhejiang Province.
Study on Energy Planning and Energy Saving Analysis of Cooling and Heating Load of a Building Complex
Authors: Zhou Yujuan , Li Kai 
Published: July 2020

Abstract
With the rapid development of the construction industry, the demand for energy is also expanding rapidly. The cooling and heating load in the building consumes a lot of energy, which is an important part of the building energy consumption. This paper takes the actual project as an example, under the guidance of the relevant national laws and regulations, analyzes the energy endowment provided by the surrounding environment of the project, and predicts and analyzes the demand of cooling and heating load of the project, so as to further put forward the energy planning scheme of cooling and heating load of the project and analyze its energy saving effect.
The Advantage of 3D Design of Mine Gas Drainage Borehole
Authors: Lian Jie 
Published: July 2020

Abstract
Coal and gas outburst is the sudden release of in-situ stress, and the release intensity is beyond people’s control. The measures to prevent and control coal and gas outburst are to build a safety barrier for the mining and excavation face by means of prevention and control engineering, construction of gas drainage borehole, artificial release of ground stress or reduction of the sudden high-intensity release of underground potential damage energy. The design of coal mine gas drainage boreholes under two-dimensional and three-dimensional conditions will be quite different. Through comparison, it can be seen that the borehole design based on three-dimensional modeling can play a better role in prevention and control of coal and gas outburst.
Intelligent Building Equipment Control Technology and Energy Saving Analysis
Authors: Ma XiaoXue , Wang Xiaotong 
Published: July 2020

Abstract
In the process of rapid urbanization in China, the proportion of buildings’ energy consumption is increasing, and the contradiction between energy and development is becoming increasingly prominent. On the basis of realizing its intelligent and comfortable goals, intelligent buildings have attracted wide attention from society due to their large operational performance. The research on energy saving of intelligent buildings has become an important direction for energy conservation research. The energy consumption of intelligent building equipment operation accounts for about 60% of energy consumption, which has become the main energy consumption object of intelligent buildings. This paper takes building equipment operation control as the research object, and introduces the energy saving ideas of building intelligent systems from the perspective of energy saving control, including energy saving control of building equipment, energy saving control of cold and heat sources, energy saving control of lighting, etc., and points out the future development direction of energy saving in intelligent buildings.
Numerical simulation of dynamic characteristics of bituminite-fired boiler after mixing lignite for combustion
Authors: Wang Zemin 
Published: July 2020

Abstract
If the lignite is mixed for combustion in the bituminous-fired boilers in a power plant, less primary air volume is required to avoid burner nozzle coking due to the high volatility of lignite. Stimulate the boiler’s dynamic field under the design conditions after reducing primary air rate using the Fluent software, and analyze the diameter of the tangent circle in the furnace and the process of primary air’s stiffness attenuation. The result shows that as the primary wind rate and speed decrease, the dynamic field in the furnace changes greatly, while the speed of the adherent wind increases, and the wall brushing phenomenon occurs. In order to ensure a dynamic field in the furnace, it is necessary to place a central cross partition to increase the rigidity of the primary air, and to prevent the primary air from decaying too quickly or deflecting towards the wall. The result can be used as a reference for the design and modification of the same type of boiler burner.
Research and development of viscosity reducer for oil well production fluid in cold transportation
Authors: Ma Zhi , Wang Changfeng , Qin Zhonghai , Gao Xiaolong , Wei Lili , Su Na , Huang Danqing , Xie Juan , Zhu Zhiguo , Zhou Donghuan 
Published: July 2020

Abstract
In view of the situation that heavy oil well production fluid needs to be gathered and transferred by heating or with heat water to ensure the normal operation, a kind of cold transportation viscosity reducer was developed through the compounding of different types of surfactants and the screening of functional additives, which adapt to the oil well produced fluid without heating or watering gathering process, for saving energy, reducing consumption and increasing efficiency, while meeting the environmental needs. After on-site practical applications of 30 pipelines with different physical properties of crude oil, the average pressure of gathering pipelines dropped 1.3 Mpa, which has achieved good results. Application results show that the cold transportation viscosity reducer has strong adaptability and less usage, and it has no influence on demulsification, while having a high value of applications and a broad market prospect.
Modeling and Analysis of Short-Circuit Fault Current for MMC-HVDC Grid with DC Circuit Breaker
Authors: Jia Haipeng , Yin Jingyuan , Wei Tongzhen , Li Jinke , Wu Lixin 
Published: July 2020

Abstract
DC line fault is one of the important factors restricting the development of flexible DC system. DC circuit breaker is an effective means to realize the short circuit fault isolation on DC side of flexible DC system. Therefore, it is necessary to add DCCB into the short-circuit current calculation and modeling of MMC-HVDC power grid for comprehensive analysis. Firstly, the external characteristics of the hybrid HVDC circuit breaker and the modular multilevel converter (MMC) are modelled. Then, the modeling of short-circuit fault current in different stages was analysed. The analysis method of short circuit fault current of four-terminal MMC system with DC circuit breaker is obtained. Finally, the simulation results and the calculation results are compared and results show the effectiveness of the short-circuit calculation method proposed by this paper.
Analysis of belt bridge mode and blasting vibration response spectrum in a mine
Authors: Liu Fangfang , He Lihua , Li Xianglong 
Published: July 2020

Abstract
With the wide application of blasting technology, people pay more and more attention to the impact of blasting vibration on the surrounding environment and buildings. To blasting vibration analysis and evaluation of the effect on the stability of the skip shaft, belt bridge based on the large finite element analysis software ANSYS Workbench entity unit model, the belt of the bridge structure modal frequency and applying 2 cm/s numerical simulation of blasting vibration load was the response of the study. The calculation results show that the maximum stress value is 0.0063 MPa, belt bridge in belt bridge at the top of the column, in the concrete design tensile strength of 1.43 MPa. The maximum strain of the belt bridge is 5.05×10-8, which is within the allowable elastic deformation range of the building, and is far less than the ultimate tensile strain of C40 concrete 1×10-4. The skip well is in a stable state.
The research progress of water treatment technology on recirculated cooling water
Authors: Liu Zhan , Li Na , Yan Meifang , Guo Ruiya , Liu Zhenfa 
Published: July 2020

Abstract
The treatment technology of circulating cooling water used in industry is summarized, and the existing problems are discussed. Then, a new environmentally friendly treatment technology of circulating cooling water-physical-chemical combined water treatment technology is introduced. Combined water treatment technology is more in line with the basic requirements of China’s sustainable development strategy. It is an important direction of circulating water treatment to study and optimize the current circulating water treatment technology.
Research on Roof Management Technology of Mining in Shallow Buried Coal Seam use Continuous Miner
Authors: Tao Du 
Published: July 2020

Abstract
For the difficulty in managing the roof of mining under the shallow buried coal seams by continuous miner, the technical principles and effects of roof management technologies such as coal pillar support, artificial forced roofing and mining with backfilling were systematically analyzed. This paper has studied the advantages and disadvantages of different roof management methods. The results show that the reasonable reservation of coal pillars can effectively manage the roof, but the mining face has a low recovery rate; effective manual forced roofing can reasonably control the roof cave and increase the mining face recovery rate; mining with backfilling can effectively prevent the large area of the roof from caving, significantly increase the recovery rate of the working face, and can reduce or even avoid surface subsidence.
Does China’s carbon emission trading policy alleviate urban carbon emissions?
Authors: Feng Yu 
Published: July 2020

Abstract
The essence of carbon emission right is a legalized right, and carbon emission right trading is to commercialize this right based on the market. This paper uses panel data of 226 prefecture-level cities in China from 2007 to 2016 as samples to examine the effect and mechanism of carbon emission trading policies on urban carbon emission intensity. The study found that the carbon emission trading policy has a significant promotion of reducing carbon emission, with the adjustment of industrial structure and energy-saving emission reduction methods. It can effectively reduce the city’s carbon emission.
A Study on the Development of Container Sea-rail Intermodal Transport of Xiamen Port in the Context of National Logistics Hub
Authors: Sun Xiaoqing , Luo Binlan 
Published: July 2020

Abstract
Container sea-rail intermodal transport has the characteristics of low cost, low emission and large scale, and has become one of the important indicators to measure port development. Xiamen has been identified as the strategic fulcrum city of the 21st century Maritime Silk Road, national logistics hub of port type, and Xiamen Port will have great opportunities for development. But, the development of container sea-rail intermodal transport of Xiamen Port is still in the period of market cultivation, and the development level is relatively backward. This paper analyzes the problems in the development of Xiamen Port container sea-rail intermodal transport in terms of railway transport, port operation, shipping company and the construction of information system for rail sea intermodal transport, and put forward the development measures include constructing the railway trunk line and the railway branch lines in port area, building the operation platform for combined transport, paying attention to the source of goods for long-distance and so on. Also, this paper puts forward some implementation plans, such as strengthening organization and coordination mechanism, cultivating leading enterprises, strengthening investment promotion.
Application of membrane separation technology in water treatment process
Authors: Wu Qingbo , Chen Qiuling 
Published: July 2020

Abstract
Water is the source of life. With the development of economy, China has paid more attention to water pollution and adopted a series of scientific solutions. Following the situation, membrane separation technology has made great progress in the research and application of water treatment. In this paper, the principle of membrane separation and the process of membrane separation are briefly introduced, and then the application of membrane separation technology in drinking water purification, industrial wastewater treatment and desalination engineering is introduced, and the discussion and summary are made according to the application.
Research on Gas Diffusion Law of Coal Mine Roadway Based on Gauss Plume Model
Authors: Nie Zhen , Ma Hongwei , Zhang Yishu 
Published: July 2020

Abstract
The gas environment of coal mine is complex, so it is urgent to monitor gas automatically and accurately through fixed instruments and mobile equipment. Combine with gas diffusion theory, a gas concentration prediction method based on the Gauss plume model was proposed, and the gas diffusion model in coal mine roadway was constructed. According to the virtual image source method, the influence of boundary reflection on gas diffusion was introduced, and the gas diffusion coefficient was modified by genetic algorithm. The results of simulation analysis and actual data analysis indicate that this method can reveal the gas distribution law of coal mine roadway, besides it can improve the real-time, convenience and reliability of gas concentration detection in the roadway.
Research on Data Analysis of a Long Slope Wireless Monitoring
Authors: Yang Xin , Jiang Shihao 
Published: July 2020

Abstract
Slope collapse is one of the most important hazards faced by most water conservancy projects. Due to the long transmission distance and unstable data transmission of existing monitoring methods, the slope safety analysis and evaluation have a great impact. Based on slope design and safety monitoring, this paper proposes to use wireless acquisition and transmission technology to carry out safety monitoring on long slopes, to further improve the accuracy of data, expand the application scope of slope monitoring. And it has been successfully applied in slope monitoring of a water conservancy project.
Risk Element Identification of Grid Communication System Based on Improved Bayesian Network under SG and UPIOT
Authors: Yue Yunli , Jia Xuefeng , Li Cunbin 
Published: July 2020

Abstract
Now, Smart Grid and Ubiquitous Power Internet of Things are booming in China. The degree of coupling between the grid and the power communication system determines the degree of development of Smart Grid and Ubiquitous Electric Internet of Things. The rapid growth of Smart Grid has resulted in the risk transfer of Smart Grid Communication Systems with many levels and a strong correlation of indicators. This paper sorts out the risk indicators and provides a three-layer risk transfer network considering equipment, environment, business and operational dimension. Moreover, the triangular fuzzy number and DS evidence theory are used to assign the Bayesian network root node probability. At last, this paper identifies the risk element of SGCS and proposes preventive measures.
An Emergency Control Method for Wind-Thermal Bundled System
Authors: Li Yifan , Huang Shaofeng 
Published: July 2020

Abstract
Wind and thermal power bundling is an effective means to solve the problem of power delivery from energy bases. In this paper, an emergency control method for wind-thermal bundled system is proposed. After the system is out of step, the stability of the system can be assessed quickly by using phase measurement unit (PMU) data and the power angle threshold can be determined. When the power angle threshold is reached, using power electronic equipment quickly to exchange the connection by disconnecting the primary side phase of the line at the synchronizer outlet. Then, the A, B, C three-phase series are connected to the C, a, B three-phase series, and the angle is reduced by 120°instantaneously. This preventing the system from falling out-of-step while maintaining the integrity of the system and the inertia level. The higher the wind power permeability, the better the performance of the proposed control method is. A case study is provided to verify the effectiveness of the proposed method.
The sizing and siting of Distributed Generation for mitigating voltage sags
Authors: Ma Li , Liu TaoFeng , Dong PengYuan , Liu Zhi , Gao ShuPing 
Published: July 2020

Abstract
Voltage sags have a major concern in the distribution systems. With the large number of distributed generations connected to the distribution networks, the complexity of distribution networks increases gradually. Thus, how to ensure the minimum damage caused by voltage sags has been the focus of research. In order to effectively mitigate voltage sags and satisfy the grid-connection control requirements of distributed generations, the sizing and siting optimization model of distributed generations is proposed in this paper. The investment and operation cost of distributed generations and mitigating voltage sags on sensitive load are comprehensively considered in this model. To reasonably evaluate economic losses of sensitive load caused by voltage sags in a grid, a novel voltage sags frequency indicator is proposed and the line faults are considered in this indicator. The proposed method is validated by IEEE 33 system and its correctness and reliability are also proved.
Corrosion and Protection of Galvanized Steel in Power Grid
Authors: Tan Xiaomeng , Xing Jingshu , Chen Hao , Zhang Tao 
Published: July 2020

Abstract
Galvanized steel is widely used in power grid, the failure of these steel components will seriously threaten the safe operation of the grid. In this paper, transmission tower angle steel and connecting bolts were investigated by means of macro-inspection, zinc coating measurement, energy dispersive spectrometer(EDS). Then the corrosion mechanism and behavior of galvanized steel have been investigated and the protection measures were proposed. The results show that the zinc coating is corroded quickly in the high sulfur environment; corrosion failure of zinc coating on the aluminum-steel dissimilar metal connecting bolt can accelerate the corrosion of the aluminum connecting plate.