bluuebunny/crossref_metadata_2025_split huggingface dataset:
Discussion on the recycling ecological chain and commercial model of decommissioned batteries
Authors: Yin Juanjuan , Pan Mingyu , Chen Zhen , Li Jing 
Published: April 2020

Abstract
When the battery capacity is reduced to less than 80%, it is no longer suitable for electric vehicles, if the decommissioned batteries directly scrapped treatment, it will cause a great waste of resources, and even cause environmental pollution. The reuse mode of lithium battery can be divided into two modes: Cascade utilization and recovery. This dissertation introduces these two methods, summarizes the current situation of power battery reuse, draws on the successful experience domestic and foreign, and combines the actual situation of domestic enterprises to improve the reuse ecosystem and business model of decommissioned batteries. The paper puts forward the business model of ‘Internet + Recycling Network + specialization processing’, and constructs the closed-loop network of retired power battery recovery, which integrates government supervision, enterprise operation and consumer participation.
Research on electromagnetic radiation interference of high voltage pulse device
Authors: Xu Yuheng , Zhang Xiangjin , Wang Ruibo , Yue Lianyong 
Published: April 2020

Abstract
In view of the strong electrostatic field interference caused by the miniaturization of high voltage pulse capacitor circuit, the protection method of electronic equipment under the strong electrostatic field interference of high voltage pulse device is proposed. Based on the background of miniaturization of all electronic security system, a high-voltage capacitor pulse discharge model is established. The surrounding radiation of high-voltage capacitor instantaneous discharge is simulated by using the COMSOL software. The electromagnetic radiation interference of high-voltage capacitor to the system is analyzed, and the anti-radiation interference measures are proposed based on the electromagnetic shielding mechanism. It provides a basis for the actual circuit design and structure layout, and provides a reference for the stability and safety of the electronic security system and further miniaturization development.
Force Analysis of Fork Type Connecting Structure Pin Roll of Aircraft Vertical Tail in Comprehensive State
Authors: Xing Tianle 
Published: April 2020

Abstract
Aiming at the stress problem of pin roll connection at the vertical tail of aircraft, the thesis establishes a simplified simulation model of vertical tail. From the mechanical perspective, it takes into account the gravity, assembly force of interference fit and the influence of air resistance on the fork force. Compared with the yield stress of titanium alloy material used in the actual fork, it is concluded that actual stress is much smaller than the yield stress of the material, which verifies the rationality of pin roll design.
Research on Improvement Methods of Automotive NVH Performance
Authors: Liu Xing 
Published: April 2020

Abstract
The performance of automotive NVH will directly affect the production and sales of automobiles. This article summarizes the generation and control of the main NVH problems in automobiles, and discusses the methods to improve the NVH performance of the vehicle from three aspects: free damping treatment of the body structure, analysis of the contribution of body panels, and analysis of key hard-point forces of the vehicle steering system.
Study on Test of Color Fastness to Rubbing of Textiles
Authors: Lei Zhenyu 
Published: April 2020

Abstract
The textile sample is rubbed with a dry friction cloth and a wet friction cloth respectively to evaluate the staining degree of the friction cloth. The tester for color fastness to rubbing provides two sets of test conditions through two friction heads of optional sizes: one for pile fabrics; The other is used for monochrome fabrics or large-area printed fabrics. Through the analysis of the original test method, the existing problems and defects of the original test method are obtained. A substitute material is used on the tester platform for testing samples, and the fixation method of the tester’s samples is improved in a pawn type, so as to solve the problem of uneven staining of friction cloth caused by uneven surface of friction head or friction medium and unilateral wear during friction.
Brittle-Plastic Properties Evaluation of Rock based on Element Logging
Authors: Li Yi , Zhang Yan Qi , Hu Zong Min , Geng Chang Xi , Yuan Bai Yan , Li Hao , Ligang Zhang 
Published: April 2020

Abstract
Rock brittle-plasticity is an important factor which can influence the selection of rock breaking method and fracturing layers. It is very important to build up an appropriate brittle-plasticity characterization method and prediction method. In this paper, the point load method was used to test the deep rock load-displacement curve in Songliao basin, calculate the plasticity coefficient and the brittle-plasticity. Then the element content of the corresponding rock samples was tested. The relationship between plasticity coefficient and element content were estimated, and the influence of elements on brittle-plasticity of rocks was revealed. Finally, the calculation model of rock plastic coefficient based on element contents was built up. The research results can be used to evaluate the real-time brittle-plasticity of formation by using element logging data.
Analysis of the influence of the vane width on the fluid transmission performance in the vane-type tank
Authors: Zhuang Baotang , Li Yong , Pan Hailin , Rui Wei 
Published: April 2020

Abstract
Fuel tanks are a core component in satellites that manage the propellant. This study numerically analyzed the fluid transport with parallel guide vanes in a vane type surface tension tank. In this paper, the numerical simulation analysis is carried out for the fluid transmission performance of the parallel vane of the new generation plate surface tension tank, and the influence of vane width on the transmission performance of vane is studied. The results show that, in the whole capillary flow stage, the liquid flow rate increases with the increase of the width a of the guide plate.
Laser Trimming Method for Reducing Frequency Split of Cylindrical Vibrating Gyroscope
Authors: Hu Youwang , Zhong Hongmin , Lu Yunpeng , Duan Ji’an , Sun Xiaoyan 
Published: April 2020

Abstract
Frequency split is the frequency difference between the driving mode and sensing mode of a vibratory gyroscope, which significantly influences the performance of cylindrical vibratory gyroscopes. In order to reducing frequency split, a method of trimming by drilling micro-holes through laser has been introduced in this paper. Firstly, the processing method of the trimming hole is determined by the finite element simulation, and then the feasibility of the method is verified by the experiment. In the experiment, the frequency split of gyroscope is reduced from 2.090Hz to 0.119Hz.
Cosine Gear Planetary Transmission with Small Teeth Number Difference
Authors: Si Chuanrui , Chen Zhitong , Zhang Hongyao , Zhang Yun , Cui Chuanhui 
Published: April 2020

Abstract
This paper presents a model of cosine gear planetary transmission with small number teeth difference (CG_PTSTD). Firstly, the mathematical model of the CG_PTSTD is established based on the theory of engagement, including the equations of the conjugate internal gear and the meshing line. Then an example of the CG_PTSTD is developed. In this example, the 2D and 3D models of the CG_PTSTD are established, and the bending and contact stresses are analyzed by finite element software ABAQUS. The results show that the cosine gear can be successfully applied to the PTSTD without tooth tip interference and there are multi teeth simultaneously participating in the mesh.
Virtual Commissioning Modeling and Simulation of Assembly System for Quasi Natural Language Programming
Authors: Yang Yajie , Zhang Zhijing , Shi Ming Kuan 
Published: April 2020

Abstract
This paper focuses on a kind of quasi natural language programming for automatic assembly system, and studies the modeling and simulation of virtual assembly prototype, including the modeling of mechanical system, control system and the error model of assembly prototype. A multi-domain model is formed based on interfaces between different professional modeling and analysis software. Based on this model, the quasi natural language program is simulated and commissioned. At the same time, the script program is run on the physical prototype to verify the consistency of the assembly system prototype. Tested by experiments, the virtual commissioning modeling and simulation technology of the assembly system can approximately restore the assembly process of the real prototype, perform lifecycle management on the development of the equipment, and improve the commissioning speed and production quality.
The wind load prediction and comparative study of asmmetric semi-submersible lifting platform based on CFD
Authors: Yao Zhenqiu , Tang Xiangyu , Ling Hongjie 
Published: April 2020

Abstract
In order to accurately predict the wind load of asymmetric offshore structures, this paper studied the wind load of an asymmetric semi-submersible lifting platform based on the CFD software FINE/MARINE, and calculated the wind load of operation state, lifting state and survival state respectively, and compared the results with those of China Classification Society(CCS) specification. The results show that under the same wind speed, the change of wind direction angle has a great influence on the distribution of wind field around the platform. The specification calculation can not fully consider the influence of the shielding effect between the components of the superstructure, therefore, the results are larger than the numerical simulation value. In addition, the wind field distribution near the platform can be used to analyze the variation of wind load, which provides an effective method for wind load prediction and wind field analysis of asymmetric offshore structures.
The State Analysis of Five-axis NC Machine with Large Torque Mechanical Spindle Based on Hilbert Transform
Authors: Fu Yaohuimei , Xia Yuanmeng , Chen Xuezhen , Zhao Guobo , Zhang Yun 
Published: April 2020

Abstract
Only five-axis machine with large torque mechanical spindle is capable to complete the process of titanium alloy aerospace structure in general. But mechanical spindle is too complex to locate the fault rapidly when the part shows anomalies or damage, and this reduces high-value machine’s utilization rate as well as brings difficulties in solving part’s quality problems. Pointing at surface quality problems and spindle component’s wearing down that emerge frequently, this paper simulates various parameters in NC(numerically controlled) machining process and monitors spindle states of a five-axis machine with large torque mechanical spindle, then amplitude, time-frequency, and frequency curvature characteristics of the tested signals are obtained by Hilbert Transform and fast identification of key component’s wearing down is realized. The results show that the state analysis method of five-axis NC machine with large torque mechanical spindle based on Hilbert transform presented in this paper has strong engineering application value.
Gas drainage radius evaluation and well pattern optimization of multilayer gas reservoirs
Authors: Liu Zhijun , Mao Zhenglin , Zhang Haobo , Zhang Yongbin , Liu Qian , Wen Zhonglin 
Published: April 2020

Abstract
In the development process of shenmu gas field, there are “few wells and low production of reserves; Many wells, high development investment and easy cross-well interference”, it is particularly important to optimize the well spacing of development well pattern. In view of this problem, on the basis of deepening geological understanding, it is necessary to clarify the gas drainage radius of each well, and combine various methods to demonstrate and optimize the well spacing of gas field well pattern.
Mechanism design and kinematics simulation of 3-DOF parallel mechanism with low coupling degree
Authors: Xie J , Zuo F F , Li Y P , Yang Q Z 
Published: April 2020

Abstract
According to the topological design theory of parallel mechanism(PM) based on the position and orientation characteristic(POC), a new PM with two translational degree of freedom(DOF) and one rotational DOF (2T1R) was proposed. The topological characteristics of the PM was analyzed, including POC set, DOF and coupling degree. Based on analytic method, the solving modeling was established, and the forward and inverse solutions were obtained. Then the correctness of the position solution was verified by Matlab. Velocity and acceleration formulas of PM were calculated by Jacobian matri, and simulation curves of velocity and acceleration was put forword. Kinematic analysis shows that the 2T1R PM has both translational and rotational characteristics, moreover, the moving platform has stable output and good dynamic characteristics.
Study on the Atmospheric Environmental Efficiency of the Silk Road Economic Belt of China Based on Energy conservation and Emission Reduction
Authors: Yin Nini , Yan Pengcheng 
Published: April 2020

Abstract
Based on SBM-Undesirable model, this paper evaluated air environmental efficiency of 8 provinces of the Silk Road Economic Belt of China during the period of 2010—2017, and investigated the temporal-variation and energy conservation and emission reduction potential. Empirical analysis shows that the overall atmospheric environmental efficiency of Silk Road Economic Belt is still at low point but presents a mild rising trend over the period 2010—2017, regional differences are remarkable, and it has great potential of energy conservation and emission reduction in the future.
The research on the management strategy of exclusive parts for satellite integration
Authors: Chen Zou 
Published: April 2020

Abstract
As an important component of satellites, the demand characteristics of exclusive parts for integration are short cycle, large quantity and low cost. It is urgent to solve the problem of meeting the demand with the current production capacity without affecting the quality level. Based on the analysis of the management strategy of the exclusive parts, it is indicated that the root cause of the problems such as the left backup and the structural shortage is the separated management system. It is also indicated the generality of some exclusive parts. In this paper, the general strategy is proposed to form a unified management system for general exclusive parts for integration, which is conducive to the full use of resources, and cost reduction.
Parametric Energy Consumption Modeling for Cathode Coating Manufacturing of Lithium-Ion Batteries
Authors: Zhou Kai , Su Yongjian , Liu Weiwei , Deng Yelin 
Published: April 2020

Abstract
In the process of manufacturing the positive electrode coating for lithium batteries, the slow and energy-consuming drying process greatly restricts the shortening of the production cycle and the improvement of energy efficiency of power lithium batteries. The purpose of this paper is to calculate the evaporation rate of N-methylpyrrolidone (NMP) solvent under different drying parameters in the first stage of evaporation and to predict the main energy consumption changes in the drying process in this stage. This research shows that, in the first evaporation stage of lithium battery coating manufacturing, when the inlet wind speed changes at 2∼12m s−1, the evaporation rate of NMP solvent obtained in the coating will change in 1.18 × 10−3 ∼2.88 × 10−3 g min−1 cm−2. For every 1m s−1 increase in wind speed, the energy consumption of electric heating increases by 57.60kW on average.
Research on the Impact of upgrading of consumption structure on energy intensity under the background of urban and rural dual economy
Authors: Li Yan , Li Yuan , Chen Tao , Hu Ying-Ying 
Published: April 2020

Abstract
Based on the current situation of dual economic structure of urban and rural areas in China, this paper takes urban and rural areas as two independent research objects, and constructs the panel threshold regression model of consumption structure upgrading on energy consumption intensity. The results show that the upgrading of regional urban residents’ consumption structure has double threshold effect on energy intensity, and the upgrading of urban residents’ consumption structure has a restraining effect on energy intensity. With the upgrading of per capita income, it first decreases and then increases; the upgrading of regional rural residents’ consumption structure has a double threshold effect on energy intensity, the upgrading of rural residents’ consumption structure will significantly inhibit the energy intensity when the per capita income of residents is in the maximum range. In addition, under the threshold of per capita income, compared with rural areas, the upgrading of consumption structure of urban residents has a more prominent effect on the inhibition of energy intensity.
Research and Field Application of Oil-paper Insulation Material Aging State Based on FDS
Authors: Li Dandan , Fan Yongqiang , Wang Yaping , Yue Yonggang , Reng Ming 
Published: April 2020

Abstract
The effects of three factors, such as aging degree, water content and temperature, on the dielectric response characteristics of oil-paper insulating materials were studied by setting up a frequency-domain dielectric response experimental platform. In this paper, the frequency domain dielectric spectrum (FDS) test is carried out for the on-site transformer paper insulated casing, and it is found that the method is more abundant than the traditional power frequency dielectric loss method, which is less affected by the work frequency electromagnetic field, and can realize the nondestructive measurement of the aging state of the oil-grease insulation.
An insulation diagnosis method for battery pack based on battery model
Authors: Zhang Yanhui , Chen Qingpeng , Liu Xiao , Yang Zhile , Guo Shifeng , Feng Wei 
Published: April 2020

Abstract
The collision and components aging of electric vehicles may lead to dramatic decrease of insulation performance in the complex application environment, which will reduce the insulation between battery pack and chassis, and will affect the performance of on-board equipment and electronic control unit, resulting in heat accumulation effect of leakage circuit and even vehicle fire. Therefore, it is critical to develop a real-time, accurate and reliable detection device to monitor the insulation resistance of the high-voltage system of electric vehicles, which is beneficial to the normal operation of electrical equipment, the safe operation of vehicles and the personal safety of passengers. In this work, an online estimation method of insulation resistance based on battery model is proposed.
Research and application on rapid recognition of CNC machine tools’ running state
Authors: Li Mengmei , Xia Yuanmeng , Chen Xuezhen 
Published: April 2020

Abstract
A rapid recognition of CNC (Computer Numerical Control) machine tools’ running state based on time domain characteristic parameters and frequency domain correlation coefficient was proposed. The experiment proved the accuracy and efficiency of the mentioned method, which made the states recognition rate reach 93.33% and the identification efficiency improve 66.67%. In this scenario, a theoretical foundation is established for the condition-based maintenance of CNC machine tools.
Design and achievement of hardware-in-the-loop simulation system for strapdown semi-active laser seeker
Authors: Zhou Wenbin , Zhang Chunxi , Wang Siyuan , Ran Longjun 
Published: April 2020

Abstract
According to the work characteristics of semi-active laser-guided weapon system, at first, the optical characteristics of the laser received by seeker were analyzed; and mathematical model of the optical signal power received by seeker was established. Secondly, a hardware-in-the-loop simulation(HILS) system was designed for strapdown seeker. In order to simulate energy and laser spot’s continuous variations, a high-precision continuous dynamic laser energy attenuation system and a digital micromirror device(DMD) spot projection system were designed respectively. In the end, the HILS system was used to evaluate the performances of strapdown seeker and the seeker was tested for response coherence among the four quadrants, field of view(FOV), linear field of view, minimum received optical power, and angle measurement accuracy.
Effect of various exercises on frailty among older adults with subjective cognitive concerns: a randomised controlled trial
Authors: Huang Chi Hsien , Umegaki Hiroyuki , Makino Taeko , Uemura Kazuki , Hayashi Takahiro , Kitada Tomoharu , Inoue Aiko , Shimada Hiroyuki , Kuzuya Masafumi 
Published: April 2020

Abstract

Background
Physical exercise has been linked to reduced frailty, but there is insufficient evidence of beneficial effects in community-dwelling older adults with subjective cognitive concerns.

Objective
This study aimed to clarify the effects of physical exercise in this population.

Design
Single-blind randomised controlled trial.

Setting
Community sports centres.

Participants
Residents aged 65–85 years were screened using the Kihon checklist; those with subjective cognitive concerns were invited for eligibility assessment. In total, 415 community-dwelling older adults were enrolled and randomised.

Methods
This trial investigated the effects of aerobic training (AT), resistance training (RT) and combined training (AT+RT) programs on reducing frailty. All participants were randomised into one of the three intervention groups or the control group. Participants in the intervention groups underwent a group training program and self-paced home training for 26 weeks. The control group received lectures about health promotion. A 95-item frailty index (FI) was utilised to determine the effects of training. Participants were followed up at weeks 26 and 52.

Results
At baseline, mean age of all participants (47% women) was 72.3 ± 4.6 years, with a mean FI score of 0.3 ± 0.1. Compared with control group, AT improved total FI by 0.020 (CI −0.039 to −0.001, effect size −0.275) and the depression and anxiety component of FI by 0.051 (CI −0.084 to −0.018, effect size −0.469) at week 26, but the effects waned at week 52. No significant differences in FI were found in RT and AT+RT groups at weeks 26 and 52.

Conclusions
A 26-week AT reduced frailty modestly, especially in the depression and anxiety component, in older adults with subjective cognitive concerns.
Discrimination and Deterrence with Enforcer Liability
Authors: Mungan Murat C 
Published: April 2020

AbstractTaste-based discrimination (i.e. discrimination due to racist preferences) receives more attention than statistical discrimination in the enforcement literature, because the latter allows enforcers to increase their “success rates.” I show here that when enforcers’ incentives can be altered via liabilities and rewards, all types of discrimination reduce deterrence. Moreover, adverse effects of statistical discrimination on deterrence are more persistent than similar effects due to taste-based discrimination. I identify crime minimizing liabilities and rewards when enforcers engage in racial discrimination and consider the robustness of the analysis in alternative settings.