bluuebunny/crossref_metadata_2025_split huggingface dataset:
Summary of Research on Supporting Facilities and Structure Vibration and Noise Reduction of High-Rise Buildings
Authors: Jinfeng Rui , Lin Wang , Pei Lu 
Published: June 2021

Abstract
At this stage, mid-to-high-rise buildings are flooding every corner of my country’s urban construction, and large-scale buildings have also become an inevitable result of urban planning and development. The comfort and safety issues associated with mid-to-high-rise buildings as well as the comfort and safety caused by structural vibration have also come into our sight. This article will explain the research on the vibration control of building power systems, air conditioning systems, network systems, pipeline systems and other building supporting facilities, as well as the research on the vibration control of building structures. These details reflect the improvement of vibration and noise reduction research in the comfort and safety of middle and high-rise buildings.
Evaluation and application of shallow buried tunnel construction safety based on combined empowerment-multidimensional cloud model
Authors: Liu Shang , Song Jie , Xu Run , Zhang Changyong , Zhong Guoqiang , Wang Chao 
Published: June 2021

Abstract
In order to study the influence of various factors on the construction safety of shallow buried tunnels, a multifactor evaluation model consisting of 9 indicators, such as tunnel size, the buried depth, surrounding rock condition and construction management, is established from the perspective of “4M1E” by combining the characteristics of shallow buried tunnel construction by borehole-blasting method. It combines the advantages of subjective weighting method AHP and objective weighting method CRITIC, and determines the comprehensive weight values through the combined weighting method, which is used to improve the weight assignment of multi-dimensional normal cloud model, and evaluates the stability of the surrounding rock at the entrance and exit of the shallow buried tunnel based on the concepts of expectation, entropy and super entropy of the cloud model. And then it accurately obtains the construction safety of the entrance and exit of the shallow buried tunnel, and the evaluation results have scientific guidance for the control of construction risks.
Experimental study on anti-freezing and thawing of preparation of wet mixed mortar with full component recycled sand in plastering engineering
Authors: Yang Yuhao , Jin Shengji , Cao Fubo 
Published: June 2021

Abstract
In this study, in order to study the freeze-thaw resistance of wet-mix plaster mortar after replacing artificial sand (AS) with full-component recycled sand (FCRS) and recycled brick powder (RBP) instead of fly ash (FA), ratio of binding material to fine aggregate (RBMFA) (1:5, 1:6 and 1:7), types of fine aggregate (TFA) (AS and FCRS) and kinds of mineral admixture (KMA) (FA and RBP) were considered as research variables. RBMFA, TFA and KMA have an effect on freeze-thaw resistance performance of wet mixed mortar (WMM) could be studied with the slow freezing method. Moreover, new way of application of brick powder was explored. Take advantage of full-component recycled fine aggregate instead of traditional AS to prepare wet mix plaster mortar (WMPM) have three meanings of saving natural resources, protecting the environment and achieving superior economic benefits. Numerical studies indicated that RBMFA is one of the most main influence factors of the freezing and thawing resistance of mortar. Under 25 freeze-thaw cycles, mass loss rate (MLR) and strength loss rate (SLR) of mortar increase with the reduction of rubber sand ratio, the average MLR of RBMFA 1:7 to 1:5 increased by 2.5%, and the average SLR increased by 7.4%. Replacing AS with FCRS and replacing BP with FA can not only alleviate the shortage of natural sand and FA, but also it could realize the resource utilization of building waste.
CFD-based fluid calculation model selection and field analysis for small reactors
Authors: Cheng Lei , Zhao Xinyu , Li Miao , Fang Xiaoqing 
Published: June 2021

Abstract
To improve the accuracy of reactor design, this article uses k-ε, DES, LES, and SST four methods to compare the simulation results of the velocity field in the blade area, turbulence intensity, and velocity distribution of the fluid in the reactor, and predict the appropriate field model of the reactor calculation. Therefore, the calculation process is more suitable for the SST model of small reactors.
Predicting the Unconfined Compressive Strength of Rubber Fiber Modified Cemented Paste Backfill Using Support Vector Machine
Authors: Yu Zhuoqun , Wang Yongyan , Huang Sa , Zhou Tongtong , Chang Le 
Published: June 2021

Abstract
Machine learning based on the support vector machine algorithm was used for the prediction of the unconfined compressive strength of rubber fiber modified cemented paste backfill. Grid analysis was used to find the optimal hyper-parameters. The SVM model was well trained on the training set, and performed well on the testing set. Analysis results showed that the SVM model achieved a higher accuracy. The squared correlation coefficient values were 0.9914 and 0.9321 on the training set and testing set, respectively. It is recommended that laboratories around the world could share UCS tests results of CPB to expand the dataset for the training of prediction models.
The application of 3D design technology in the design of 220kV substation in Miluo Western
Authors: Wen Jiang , Chaoqi Xiong , Wei Zhai , Xinxin Xiang , Hongtao Ju 
Published: June 2021

Abstract
Based on engineering information and geographic information data, through the integrated application of 3D modeling technology and digital collaborative design technology, the 3D visual design and information integration of power transmission and transformation projects are completed, 3D design can realize complex underground pipeline layout, cable optimization layout, collision inspection, visual display, etc. It is helpful to reduce the soft and hard collision of the project, ensure the design safety and quality, optimize the work quantity and guide the construction. In this paper, through the application of 3D design technology in the design of 220kV substation in Miluo Western, the main aspects and benefits of application are summarized, and the existing problems are analyzed for reference in other engineering applications.
Lubrication characteristics study of main bearings on crankshaft balance rate
Authors: Li Yunqiang , Zhu Guixiang , Liu Xin , Sun Nannan , Meng Qingbin , Yang Zhihao , Zhao Junsheng 
Published: June 2021

Abstract
Unbalanced inertia force and moment of crankshaft generated by cylinder pressure have a significant effect on the vibration characteristics of diesel engine, but the study on the lubrication characteristics of crankshaft by balance rate needs to be studied. Based on Greenwood-Tripp asperity contact theory and average Reynolds equation, an elastohydrodynamic (EHD) lubrication model of the main bearing for a V-12 diesel engine is developed, and the influence of different balance rates on lubrication characteristics is analyzed. On this basis, a factorial experiment of ten influencing factors including the balance rate is designed, and the factors that significantly affected the lubrication characteristics of the main bearing are screened out by factor effect diagram, statistical analysis and residual probability diagram. The results show that the crankshaft with different balance rate has a great influence on the lubrication performance. With the increase of balance rate, the minimum oil film thickness first increases and then decreases, and the maximum oil film pressure first decreases and then increases. The balance rate, bearing width, bearing clearance, bush repair and oil viscosity have significant effects on the performance of main bearing, among which the balance rate of crankshaft has the greatest effect on the minimum oil film thickness, the maximum rough contact pressure and the average friction power loss.
The design of the traffic plan of line S1 of Taizhou railway in Zhejiang Province
Authors: Li Zimu 
Published: June 2021

Abstract
At present, China is in the period of rapid urbanization construction, and gradually build a set of efficient, new and fast comprehensive urban transportation system. The urban railway construction with the same city commuter and convenient public transport service can effectively extend the urban development space and accelerate the adjustment process of urban planning and layout. According to the current situation of Taizhou’s economic and traffic development, as well as Taizhou’s unique geographical advantages, combined with the relevant research at home and abroad, this paper comprehensively discusses the necessity of building Taizhou City railway line S1. By sorting out the relevant preliminary, short-term and long-term passenger flow forecast data, this paper calculates the maximum section passenger flow in each period of the day, analyzes the characteristics of passenger flow in each period, compiles the full-time driving plan compilation data, and makes corresponding adjustments according to the actual situation, and finally designs the full-time driving plan to meet the passenger flow demand in each period. The second chapter describes the research background, the third chapter analyzes the characteristics of passenger flow, and the fourth chapter designs the driving plan and draws the train diagram.
Structural Optimization of Subway Aluminum Alloy Car Body Analyzed by Optistruct Software
Authors: Wang Ning , An Ziliang , Bai Dingsong , Liu Shaofeng , Yu Xintong 
Published: June 2021

Abstract
In accordance with the life cycle cost of the vehicle, the structure of the aluminum alloy car body structure of Shanghai Line 16 was optimized based on the Optistruct software. Then the load combination conditions are divided into 9 operating conditions based on EN12663-2010. Furthermore, the optimized car body is judged whether it is qualified. The experimental results show that the optimized car body structure of Shanghai Line 16 can meet EN12663 and TB/T1335. In this paper, it provides a high application prospect for reducing LCC of the aluminum alloy car body in the design stage.
Discussion and analysis on problems of lube oil cooler and the oil cooler three way valve of a thermal power unit
Authors: Junfeng-Qi  , Yuzhu-Zhao  , Ke-Li  , Zhengfeng-Wu  , Jinliang-Liu  
Published: June 2021

Abstract
Lube oil cooler is an important heat exchange equipment to provide suitable oil temperature for steam turbine unit. Its reliability is directly related to the normal operation of the unit. Combined with the system commissioning work, this paper finds out the problems existing in the lube oil cooler body and the oil cooler three way valve, and puts forward several improvement and optimization schemes, so as to improve the operation status of the equipment, improve the reliability of the system, and also facilitate the maintenance of the equipment, which provides a design reference for ensuring the safe and economic operation of the unit.
DCS Modification Design for I&C System of Nuclear Power Plants
Authors: Nanchuan Liu , Fan Lu , Libing Zhang , Yanjun Hu 
Published: June 2021

Abstract
Taking the DCS modification project of I&C system in the nuclear power plant as an example, this paper introduces a solution to replace the traditional I&C system with DCS (or digitization technology) from the aspects of function optimization, power supply design, I/O channels design, HMI, cabinet layout, etc. The modified I&C system retains all the functions of the original system, and greatly improves the reliability, interactivity, scalability and convenience in maintenance of the system.
Research on live detection technology of Arrester Based on wireless synchronization technology
Authors: Zhong Dantian , Li Zhongyi , Wu Hongyu , Wu Di 
Published: June 2021

Abstract
There are a lot of MOA in power system, and it’s reliability is very important to power system. In order to ensure the safe operation of MOA, the running state of MOA must be tested regularly. This paper studies the traditional method of live detection of arrester used in substation. Based on the principle of live detection of wired arrester, a new method of measuring Arrester Based on wireless synchronization technology is designed. It provides a new measuring method for the live detection technology of lightning arrester in substation, and detects the aging and damp of arrester more efficiently and safely.
Determination Method of Contact Ablation Degree of Power System Circuit Breaker Based on Power Load Property
Authors: Wang Shao Ran , Zhao Xiao Bing , Wang Chao , Ping Man Xiao , Yu Bo , Xin Piao Yong , Yang Jie 
Published: June 2021

Abstract
In the field of electrical engineering, the stable operation of circuit breaker is one of the important indexes to ensure the safety and stability of power system. Because the influence of load property on electromagnetic wave waveform is not considered, the method to determine the ablation degree of circuit breaker by using the characteristics of radiated electromagnetic wave is not completely accurate. Therefore, this paper proposes a method to determine the ablation degree of circuit breaker considering the load properties. By adding load factor, the ablation degree of circuit breaker contact can be determined more accurately. When the load is resistive load, the load factor is 1, when the load is inductive load, the load factor is 2.5, when the load is capacitive load, the load factor is 3. When the duration of the radiated electromagnetic wave exceeds the corresponding time, it can be judged that the contact is seriously ablated. The method proposed in this paper mainly uses electrical detection means to realize the rapid determination of the ablation degree of the circuit breaker contact and avoid the misjudgment caused by not considering the nature of the load.
Structural response analysis of wind turbine under different wind speeds
Authors: Huo Qian 
Published: June 2021

Abstract
Taking a 2 MW horizontal axis wind turbine in a wind farm in Northwest China as the research object, the structural response analysis of wind turbine considering fluid structure coupling effect under different inflow was carried out by using ANSYS Workbench software. The results show that when the incoming wind speed is cut-in wind speed, the displacement and stress change slightly; when the incoming wind speed is between the cut-in and cut-out wind speed, the structural response law of the wind turbine is the same. The maximum of displacement and stress increase with the increase of wind speed, and the maximum displacement of the blade is located in the tip, and the maximum stress of the blade is concentrated in the middle of the blade; The maximum displacement of the tower is located at the top, and the maximum stress of the tower is concentrated at the bottom. The results have important reference value for the design and safe operation of wind turbine.
Dielectric and Design and Experimental Study of GIS Gas Chamber HF and Micro Water Dual Fiber Laser Detection System
Authors: Shiling Zhang , Xiaozhe Zeng 
Published: June 2021

Abstract
HF gas and trace moisture content, as the primary characteristic by-products of SF6 gas decomposition reaction, are of great significance to the fault diagnosis of high voltage SF6 gas insulated high voltage power equipment. In this paper, the typical discharge fault types in GIS are analyzed, and the decomposition products corresponding to different discharge types are summarized. The physical and chemical mechanism of HF generation in the early dissociation process of SF6 and under certain micro water and micro oxygen conditions is explained, and the experimental platform is built to carry out the simulation generation experiment of HF gas and micro water. The results show that choosing the best target absorption line suitable for sensitive and selective gas sensing can eliminate interference, simplify the system and reduce the cost. Furthermore, under the experimental conditions, the self-developed TDLAS online detection technology is used to realize the effective detection of HF gas and trace water in GIS discharge room. The 1278nm and 1392nm laser sources are selected respectively, and the TDLAS technology based on dual fiber time-sharing multiplexing is feasible for HF and trace water measurement. The stability and reliability of the technology are verified, which can provide effective technical support for on-line detection of HF gas in GIS, and has good engineering application value.
A method of mining electricity consumption behaviour based on CC-DWT
Authors: Li Fan , Tian Yingjie , Wu Yi , Liu Yihan 
Published: June 2021

Abstract
In this paper, a fusion clustering algorithm based on discrete wavelet transform called CC-DDWT is proposed. In this method, the preliminary feature construction of load curve is realized by multi-layer discrete wavelet transform, and the approximate component and detail component are formed, and then the clustering fusion is carried out. The experimental results show that the typical load patterns of a single user extracted by this method are more reliable than the traditional methods.
Optimization of horizontal well pattern in low permeability layered reservoir
Authors: Xia Wang , Yayuan Tao , Xiuwei Wang , Jing LI , Qihao HU , Xiaoying Shi , Minmin Shao 
Published: June 2021

Abstract
The southern part of Jin45 fault block is a low permeability layered reservoir with thin oil layer thickness. And the development of horizontal well pattern has good economic benefit in Jin45 fault block. The oil layer distribution of reservoir is quite different. The distribution of main layer is stable, but the distribution of non-main layer is unstable. In this study, through reservoir engineering method and numerical simulation method, the horizontal well pattern direction, well pattern form, well spacing and horizontal well length are optimized to determine the horizontal well pattern of main layer. On this basis, according to the principle of “parallel deployment of horizontal wells and sharing injection-production well pattern”, the horizontal well pattern of non-main layer is preliminarily designed to ensure the development effect and economic benefit to the greatest extent.
Study on low frequency sound absorption characteristics of cavity coating with local resonance
Authors: Jiabei Wang , Hao Zhou 
Published: June 2021

Abstract
It is of great significance to study the low frequency acoustic absorption characteristics of acoustic cover for improving the acoustic stealth performance of submarine. Considering the sound absorption performance of cavity coating and local resonant thin film structure, a finite element model of cavity acoustic coating with local resonance is established. The sound absorption characteristics of the composite structure in the range of 10-1000Hz are studied. The influence law of the sound absorption performance was obtained by adjusting the geometric parameters of the composite structure. The results show that : (1) The coupling between the local resonant structure and the cavity coating can produce a sound absorption peak, and the sound absorption coefficient can be increased by 30% at most; (2) The first sound absorption peak produced by the composite structure is mainly related to the cavity overburden; (3) The second sound absorption peak is mainly generated by the coupling between the cavity coating and the local resonance structure. The results can provide a theoretical basis for the design and application of acoustic coating.
Underground Thermal Engermal Energy Storage Storage Concrete Piples Around the Simulation and Analysis of Temperature Fileds
Authors: Huijun Duan 
Published: June 2021

Abstract
Based on the establishment of the concrete pile test-bed, the selection of concrete materials and the selection of insulation materials outside the concrete pile are compared, and the better materials are obtained. The heat exchanger is embedded in the concrete pile in advance, and the heat is stored in the concrete pile by using the heat source. By measuring the temperature and other parameters in different depths of concrete pile, the thermal storage effect of thermal storage pile is analyzed and the optimal thermal storage model is established. In this paper, through the study of the relevant data about the underground heat storage model of soil heat pump, the physical model and mathematical model used for the simulation and analysis of the temperature field around the buried pipe heat exchanger of underground concrete heat storage pile are obtained. In this paper, the single U vertical buried pipe is selected as the physical model, and the cylindrical heat source model is selected as the mathematical model, so as to simplify the heat exchanger around the buried pipe of underground concrete. The model of heat transfer is established. The mathematical model is analyzed with MATLAB. In this paper, the changes of concrete temperature with depth, radius, flow rate, specific heat and thermal conductivity are analyzed. The influence trend of these factors on the concrete temperature field around the buried pipe of the heat storage pile is summarized.

Classification number: TK521 Document identification code: A
The influence of laser power and scanning speed on the dimensional accuracy of SLS formed parts
Authors: Hou Gaoyan , Yu Zhongzhen , Ye Dong 
Published: June 2021

Abstract
In SLS sintering forming, laser power and scanning speed are two important process parameters, which directly affect the dimensional accuracy of sintered parts. Using PA2200 powder as the forming material, the influence of laser power and scanning speed on the dimensional accuracy of the sintered part was analyzed. Through theoretical analysis and experimental verification, the best combination of parameters was obtained. The laser power is 40 W and the scan speed is 5000 mm/s. The dimensional accuracy of the sintered parts is obtained by X-direction deviation -0.35 %, Y-direction deviation -0.4 %, and Z-direction deviation -0.25 %.
Application and Development Trend of Grouting Technology in Prevention and Control of Ordovician Limestone Water Disaster in North China Type Coalfields
Authors: Xuedong Kan , Le Tian , Xuliang An , Shuitao Guo , Xue Yang , Peiguo Heng 
Published: June 2021

Abstract
The hydrogeological conditions of North China type coalfields are complex. With the large-scale development of deep resources, the probability of Ordovician limestone water inrush from coal seam floor increases. Ordovician limestone water disaster has become a serious safety threat to deep mining in North China type coalfields. Since the application of grouting technology can quickly block the water inrush passage and eliminate potential floods, it has obvious advantages in the prevention and control of Ordovician limestone water disasters in North China type coalfields. Equipment progresses, such as working face grouting, downhole directional drilling grouting and surface directional drilling grouting, promote the sustainable development of grouting technology for prevention and control of Ordovician limestone water disaster in North China type coalfields. This paper analyzed the development process of grouting technology in the prevention and control of Ordovician limestone water disaster in North China type coalfields, analyzed the problems encountered for surface directional drilling grouting in practice based on advanced Ordovician limestone water disaster treatment project cases, and pointed out the development direction of surface directional drilling grouting technology for regional water disaster prevention and control. This paper is of important reference significance for prevention and control of Ordovician limestone water disaster in deep mining floor of North China type coalfields.