bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Study on the Law of Gas Production by Pyrolysis of Mixed Insulating Oil under Simulated Overheating Condition
Authors: Li Guoxing , Fu Lijun , Wang Yue , Li Lin , Zhang Liang , Guan Yanling 
Published: March 2021

Abstract
To analyze the law of decomposition and gas production of mixed insulating oil under the action of heat energy, this research conducted the decomposition test of mineral insulating oil, vegetable insulating oil and mixed insulating oil at different hot-spot temperatures through the thermal fault simulation test, compared and analyzed the gas production characteristics and differences of the three insulating oils under the action of heat energy, and analyzed the pyrolysis gas production mechanism of vegetable insulating oil. According to the test results, it can be found that under the condition of no insulating paper and metal catalyst, the characteristic gases produced by the three oils under the action of heat energy are the same, mainly H2, CH4, C2H4, C2H6, CO, CO2. When the temperature is higher than 700°C, a small amount of C2H2 will be produced; when the temperature is low overheated, the pyrolysis characteristic gases of mineral insulating oil are mainly H2 and CH4, while the characteristic gases of vegetable insulating oil and mixed insulating oil are H2 and C2H6; when heated, vegetable insulating oil is more easily to produce H2 than mineral insulating oil; under the same conditions, the CO and CO2 produced in the vegetable insulating oil are much more than that of the mineral insulating oil, dozens of times more at high temperature; the mixed oil presents similar characteristics to the vegetable insulating oil, which is consistent with the relatively large proportion of vegetable oil in the mixed oil.
Application Status and Trend of Autonomous Sailing Boat Based on New Energy
Authors: Li Lei , Liu Shixuan , Chen Shizhe , Wang Bo , Miao Bin 
Published: March 2021

Abstract
The autonomous sailing boat is becoming a rapidly developing technology for long time ocean science observations in recent years. In this paper, we give an overview of the representative autonomous sailing boat and typical application in the ocean researches, and point out the characteristics which are different from others. We discuss the control system method of autonomous sailing boat and summarize it into a three layer mode structure based on the application and effect. Based on the controlled target we analyse the relationship between the three layers, and discuss the typical control algorithm respectively and application boundary in each layer. We conclude with a brief outlook on the parameter selection of different application for design and the main problems of existing control algorithms. At the last part of this paper, we show a brief outlook on the development direction and key technologies to be broken through in practical application of global ocean environments.
Major Understanding and Innovation, Challenges and Potential analysis of Shale Gas Exploration and Development in China
Authors: Liu Dexun , Wang Hongyan , Zhao Qun , Zhang Leifu , Liu Honglin , Liu Dealai , Liu Jipeng 
Published: March 2021

Abstract
Affected by the success of shale gas development in North America, the Chinese government and major oil and gas producers accurately grasped the development trend of shale gas industry, promoted the pilot tests and introduced policies effectively. In 2018, shale gas production in China was 1.53×1010m3. A total of 1000 horizontal wells were drilled. There are some major understanding and innovation achieved, such as stratigraphic division scheme, development characteristics of nanopores, causes of high TOC(Total Organic Carbon) in black shale. The Challenges are discussed. The endowment of shale gas resource is relatively poor. Some key technologies and equipment encounter “bottleneck” and there is poor external environment for development. At last, the paper analyses the development potentials of shale gas in China. The shale gas resources are rich, and shale gas will be the main contributor to the growth of China’s natural gas production. The next step is need to speed up exploration and development, and to increase reserves and production quickly. Also, it is necessary to insist on innovation, offer on-site services, guidance and support, thus providing technical support for realizing new historic leaps of shale gas in China.
Allocation of Sea Space Resources Based on Factor Endowments: a Numerical Example
Authors: Kang Minjie 
Published: March 2021

Abstract
A model of sea space resource allocation is constructed based on the idea of factor endowment theory. The effect of the model is explained by a numerical example. According to the theory of factor endowment, each sea area has the advantage of abundant factor intensive sea area utilization type. Each region should put more factors into the advantageous sea area utilization type. Compared with the output of the sea area utilization type with no advantages produced on its own self, the opportunity cost of obtaining the output of the sea area utilization type with no advantages through exchange is lower. The result of the numerical example shows that the total output of the two sea areas increases based on factor endowment allocation of sea resources. Both regions also achieved a win-win situation, with each region increasing its income by exchanging the output of sea use.
Numerical Analysis of Soil Squeezing Effect of Pipe Pile Construction in Deep Silt Site
Authors: Ding Jihui , Zhang Jinlei , Wang Qi , Zhang Jian , Qi Haitao 
Published: March 2021

Abstract
This article is based on a pile foundation project in Wenzhou City, combined with construction site monitoring data, and established a finite element model to analyze the soil squeezing displacement caused by the construction of PHC pipe piles in deep silt sites, as well as the displacement of different sizes of digged holes on the surface impact. When the distance from the pile position to monitoring point is 35 times of the pile diameter, the field test results show that the horizontal displacement and velocity change of the soil caused by the pile foundation construction decrease with the buried depth, and the main influence range is within the buried depth of 0-14 m. Numerical simulation results show that: (1)without digged hole, the main influence range of the main soil squeezing displacement is about 8 times of pile diameter; (2)the larger the diameter of the digged hole, the smaller the displacement and the influence range of the affected soil on the surface; (3)The ground squeeze displacement caused by the pile construction attenuates in a power function with the distance from the pile position to the measuring point.
The Effect of Phosphate Fertilizer on Fluoride Accumulation in Tea Leaves Based on Ecological Environment Analysis
Authors: Li Tao , He Jiangang , Zhou Zhao , Chen Ruilin , Tang Yongli , Wang Danyang , Feng Zixuan , Liu Yitin , Tian Bin , Ma Le , Sun Min 
Published: March 2021

Abstract
Moderate levels of fluoride ingestion are beneficial to human health. Tea plant can accumulate fluoride. The high intake of fluoride may lead to skeletal fluorosis and dental. When the usage of phosphate fertilizer increased, the water soluble fluoride contents in the soil increased and the soil pH values decreased. The fluoride contents in the green teas were linearly related with the water soluble fluoride contents in the soil. The phosphate fertilizer, which contained high levels of fluoride, led to the high fluoride contents in the mature green teas. In developing green chemistry and green engineering, it maybe a low-cost method for the reduction the contents of fluoride in mature teas by limiting on the fluoride content in phosphate fertilizer used in the tea plantations in China.
Study on Heatwave Disaster Prevention and Control Planning System—Enlightenment of Major Countries in the World
Authors: Huang Haijing , An Zhenwang 
Published: March 2021

Abstract
Due to global warming, the frequency and intensity of extreme heatwave are increasing. Heatwave disaster will become one of the most serious disasters in the future. In order to reduce the impact of heatwave, comparative analysis, case analysis and induction are used to study the response measures of heat wave disasters in major countries in the world, which are divided into the following two parts: heatwave disaster monitoring and early warning system and heat-health action plan. From the perspectives of early warning standards, response measures and response agencies, the standard and complete framework of heat health action plan is proposed. Some suggestions are put forward to establish a perfect and effective heatwave response system.
Study on Multi-objective Combination Model Based on Pollutants Control of Groundwater Allocation System
Authors: Dong Shen , Sheng Zebin , Wang Yilin 
Published: March 2021

Abstract
Groundwater resources are abundant on the middle and lower reaches of the Yellow River. However, due to the flat terrain and slow underground runoff, the water quality of groundwater intake wells is gradually deteriorating as a result of the deposition of pollutants, conventional allocation methods can’t meet the groundwater intake demand. In response to this problem, firstly, based on the investigation and study of groundwater intake rules and water quality characteristics on both sides of the Yellow River mainstream, the micro-hydraulic simulation model of the groundwater intake and allocation system is established. Secondly, Fourier Curve is used to fit and predict the characteristic pollutants for each well, then the water quality model of the groundwater allocation system is established combined with the dynamic equation. Finally, the combination model based on pollutants control of groundwater allocation system is constructed with three objectives, which are water quality optimization, safety optimization and energy consumption optimization. The model is solved by APGA algorithm and the corresponding calculation program is compiled with Visual Studio 2019. Through the application in a city on the middle and lower reaches of the Yellow River, the advantages of the model in pollutants control and energy consumption reduction are verified, meanwhile, a scientific and practical optimization technology for groundwater intake and allocation system is provided.
Development of Non-point Source Air Pollution Standard System in China
Authors: Jin Chenhong , Yang Shuo , Liu Yanping , Guan Jinxin , Wang Bo 
Published: March 2021

Abstract
Non-point source air pollution refers to the air pollution type that have no obvious source, which is regarded as an important contributor to the atmospheric pollution problem. Comparing to the point-source and linear-source air pollution, the standardization in the relation to non-point air pollution China is relatively sluggish. The present paper collected and analysed the existing air pollution standards in China, and establish the non-point source pollution standard system in the accordance with different sectors such as industry, agriculture, construction, transportation and social life. Due to the overlapped functions and unclear jurisdiction of different administrative departments, as well as the lagging progress of the government-dominated standard, a paradigm shift of non-point source air pollution standardization should be from government-dominated to market-oriented model. The lessons learned for other developing countries includes expanding standardization to multi-aspects to realize full lifecycle control and management, building rapid responding mechanism of standardization to reconcile with industry and social transformation, integrating outdated standards into new versions, and establishing market-based standard system.
Design of Duck Wave Power Generation Device Based on Wave Energy
Authors: Feng Yanqing , Zhang Guocai , Shen Yang , You Yong , Sun Junhui 
Published: March 2021

Abstract
The study of wave power generation is more and more popular in modern science and technology for the new renewable energy, in recent years. Designing wave power generation devices with high conversion efficiency and stability, and improving the technical level for commercialization are both scientifically interesting and potentially useful. Here we achieve the stability of wave generation equipment by establishing one nodding duck energy conversion system in a wave tank. Equipped with ultrasonic distance sensor, combining screw slide and stepper motor as draft self-regulation feedback system, our device is always in the best working performance under the single-chip microcomputer STM32 auto-measuring system. The good conversion efficiency performance can be 43%. The ARDUINO module and the Labview host computer interface are equipped to real-time visualize and characterize the parameters of the device and calculate the optimal power generation efficiency. Our designed device can resist damage validly with high conversion efficiency and stability.
A Parallel Electrical Optimized Load Forecasting Method Based on Quasi-Recurrent Neural Network
Authors: Yang Caiming , Wang Wenxing , Zhang Xinxin , Guo Qinhui , Zhu Tianyi , Ai Qian 
Published: March 2021

Abstract
Based on massive power big data resources, this paper establishes a new model for short-term load forecasting based on quasi-recurrent neural network (QRNN). QRNN combines the structural advantages of recurrent neural network (RNN) and convolutional neural network (CNN). It takes advantage of RNN’s cyclic connections to deal with the temporal dependencies of the load series, while implementing parallel calculations in both timestep and minibatch dimensions like CNN. The paper detailly describes the design and construction of QRNN, as well as the pre-processing and training steps of the forecasting model. Then, the algorithm is deployed to the big data platform, and an integrated load prediction system integrating data extraction, offline training, online forecasting and data visualization is developed. Finally, the proposed model is compared with some widely used machine learning load forecasting models. The results show that the QRNN based method achieves better prediction accuracy, and greatly improves the computational efficiency of training and testing, which is more practical for real-time and large-scale load forecasting.
Application Research of Big Data Real-time Processing Technology in Smart Grid
Authors: Zhou Sheng , Li Hongfa , Zhang Jianglong , Wu Shuling , Chen Shiton , Wu Xiaohua , Jin Tao 
Published: March 2021

Abstract
Big data is valuable, and big data processing technology can efficiently process massive data and get the value in big data, so the research and application of big data technology become popular nowadays. Smart grid is one of the most potential field for application of big data technology, applying big data technology to smart grid can improve the reliability and economy of smart grid. The operating conditions of power system changes rapidly, therefore, real-time processing technology became the focus of application field. This paper reviewed the data sources, data characteristics and data application scenarios of big data in smart grid, analyzed data processing modes of big data processing technology: batch processing and stream processing, and compared the realization methods of real-time big data processing, summarized the application of big data real-time processing technology in smart grid, and the challenges in the application, and finally, prospected the application of real-time big data processing technology in smart grid.
Research on Testing Method of Fault Injection for Motor Controller
Authors: Wang Bin , Zhang Zezhong , Ma Kai , Huang Xin , Wang Fang , Li Bo 
Published: March 2021

Abstract
According to the ISO 26262 standard, the fault injection test in the R&D verification stage can clearly show the stability or safety response ability of the Unit Under Test in the face of various faults or extreme conditions. This paper introduces the safety state mode of the motor drive system for electric vehicles, analyzes the possible fault forms of the Motor Controller Unit, builds a power hardware-in-the-loop test platform and carries out fault injection test by taking the motor rotation fault as an example. The results show that the fault injection test method proposed in this paper is an effective means to verify the functional safety of the electric drive system.
Research on H∞ Robust Control Strategy of Wind Turbine Hydraulic Variable Pitch System
Authors: Wang Shaoping , Wang Bing , Shen Wangping 
Published: March 2021

Abstract
The variable pitch system is an important part of the wind turbine. In consideration of the parameter uncertainty and external interference in the hydraulic variable pitch system, this paper proposes a H ∞ robust control strategy for the wind turbine variable pitch system. Firstly, the model of the system is given and the equation of state is obtained. According to the performance requirements, the weighted function which meets the system requirements in the process of the mixed sensitivity optimization is selected, and then the state space realization of the system generalized controlled object is obtained. Then, the H ∞ controller is obtained by solving Riccati equation. Finally, the designed system reduces the steady-state error, and improves the robustness of the system.
Structural and Building Engineering – an Introduction
Authors: Šenitková Ingrid Juhásová , Juhás Pavol 
Published: March 2021

Abstract
Construction is a reflection of the current state of society. The construction is created as a result of a creative process including preparation, all stages of design and implementation. Current trends of modern building structures with a large span are characterized by the introduction of new types of load-bearing structural systems with excellent ecological, economic and aesthetic properties. The paper aim is to introduce the interaction and context in design and create a reliable economic and environmental friendly structure that will serve the required purposes.
Strength and Resistance of Structural Steels and Materials
Authors: Juhás Pavol , Šenitková Ingrid Juhásová 
Published: March 2021

Abstract
The paper presents basic information on determining of strength and resistance of structural steels and materials based on test results. The actual European standard EN 1990:2002 and related national standards CSN EN 1990:2004, and other are respected within the paper. The practical application of standard procedures is applied in determining the characteristic and design values of strength and resistance of structural steel S235 used for the production of welded test bars of the previous author’s experimental researches. Experimental data on the actual geometric dimensions and material properties of the individual test bars enabled their detailed statistical evaluation. Subsequently, the characteristic and design values of strength and resistance of structural steels used for the production of test bars were determined. The characteristic and design values of strength and resistance determined in this way are compared with the standard ones, which for S235 steel contain valid standards for the design of steel structures.
Ductwork Pressure Loss Determination Utilizing Building Information Model
Authors: Nováček Michal , Remeš Josef 
Published: March 2021

Abstract
Building design created as an information model contains not only information formated during building geometry creation but also additional information filled in by a designer. The data can be used further as well as applied in building geometry analyses. One of these are analyses of pressure loss in air-handling units. Such analyses take the advantage of both created geometric parameters, and basic physical variable. These analyses can be carried out directly in BIM software without external calculations needed. The main aim of this article is to describe utilization of information in building model leading to obtain pressure loss in air-handling units.
Quality of the Indoor Environment in the Nursery School: Monitoring, Analysis and Optimization
Authors: Kraus Michal , Šenitková Ingrid Juhásová , Hadrbolcová Kamila 
Published: March 2021

Abstract
The paper aims are to assess and evaluate the hygiene and quality of the indoor environment in selected indoor areas of the kindergarten, to analyse the construction, technical and technological solutions of the building in accordance with the concept of designing healthy buildings and their environment. The paper will propose the operation of the building in terms of hygiene and perceived air quality. The paper assumes in-situ monitoring of the indoor environment of the nursery school using a multifunctional measuring instrument for analysing the quality of the indoor environment and comfort (Testo 480 + accessories). The research goal is to update and expand information on the quality of the indoor environment of kindergartens during the heating season. The aim is to design a concept for improving the quality of the environment in nursery schools and to prepare documents for relevant recommendations, including recommendations concerning, for example, construction or utility materials for nursery schools and the mode of their operation.
The State of Public Space in Small Towns in Terms of its Users’ Risk Groups
Authors: Kramarova Zuzana , Kankovsky Ales 
Published: March 2021

Abstract
At the beginning of the 3rd millennium, the issue of small towns is still a very problematic area in terms of urban planning which lies on the fringes of the interest of the professional public. The issue of the quality of public space in small towns is not tackled and its current development is in some places unprofessional because it is determined mainly by the local community instead of experts. Public space in small towns is massively subordinated to the needs of individual car transport and as a result, this space is aesthetically and functionally degrading, and at the same time, it contributes to the deterioration of the health of a population that does not move enough especially the most commonly used part - walking. The aim of this paper is to approach the needs of adaptation of public space in small towns for risk groups of the population, which are mainly seniors, children, and people accompanying children under 5 years of age.
Thermal Properties and Overheating of Ventilated Air Cavities Under Pitched Roof Coverings
Authors: Pilný Ondřej , Kalousek Lubor 
Published: March 2021

Abstract
Ventilated air cavities have been a mandatory part of thermally insulated pitched roofs in the Czech Republic. The purpose of these important elements is, among other things, primarily to prevent condensation of water vapor, which could otherwise endanger the roof structure and thus negatively affect the life of the entire composition. However, their thermal properties are often neglected and their overall design is overwhelmingly approached, due to the very difficult and complex calculation, as an empirical and normative matter without a higher link to the actual properties of the air cavity itself. It is therefore necessary that mentioned properties must be investigated more thoroughly, especially with increasing demands on thermal properties and increasingly extreme temperature fluctuations. This work describes a real full-scale experiment in which the properties of temperature and humidity of ventilated air cavities at the boundary with the external environment were measured. The composition of the experimental roof of the building was measured in all important layers, together with all the external and internal environmental conditions. The output is then a detailed course of behavior, which was analyzed and described.