bluuebunny/crossref_metadata_2025_split huggingface dataset:
Steganalysis by Recombining Spatial Rich Model
Authors: Gan Ling , Sun Ning 
Published: December 2019

Abstract
Steganalysis is an important topic in the field of information security. Steganalysis is mainly based on the traditional machine learning method, represented by the spatial rich model, and has high detection performance. Aiming at the problems of high feature dimension, strong redundancy and long feature extraction time in the spatial rich model, this paper conducts a series of feature selection operations and explores four different model combination methods: single quantization factor combination method, single filter kernel type combination method, mixed selecting combination method, Pearson correlation coefficient combination method. In addition, a feature preprocessing means are added. The experiment proves that the combination of mixed selecting combination and Pearson correlation coefficient can be stable with the performance of steganalysis before dimension reduction, but the performance dimension ratio is higher.
Study on electrical properties of Nano SiO2/Phenolic-resin Superamphiphobic composite insulation materials
Authors: Guo Kai , Wu Kai , Li Xingeng , Jiang Bo , Wu Yaping , Tian Shuang 
Published: December 2019

Abstract
In this paper, based on the key problems of super-bispecient insulation materials, a new nano-SiO2/Phenolic resin-based super-bispecient material was studied through blending process. The combination fastness between microcosmic rough structures and substrates and between microcosmic rough structures in existing technologies is not enough, and the rough structures are easy to be destroyed, which makes the prepared superamphiphobic surface not durable. Therefore, the study of superamphiphobic surfaces with wear resistance and repairability is a powerful guarantee to solve this problem.
Experimental Analysis of Radial Tire Stiffness and Grounding Characteristics
Authors: Sun PengFei , Feng GuanYong , Zhou ShuiTing , Qiu ChaoZhi , Fan JunWen 
Published: December 2019

Abstract
The radial tire was tested by the tire comprehensive testing machine to analyze the stiffness characteristics and grounding characteristics of the tire under different tire pressure and vertical load. The results show that the stiffness of different directions changes when the tire pressure increases. The longitudinal stiffness increases slightly and the torsional stiffness increases when the vertical load increases. As the vertical load increases, the tread impression changes from the ellipse to the approximately rectangle, and the area of the tread impression is slightly increased. As the tire pressure increases, the area of the tread impression is significantly reduced.
A Study on Obstacle-surmounting Performance of Sand Milling Vehicles
Authors: Sun Ye , Hu Hao , Liang Xiaodong , Yin Kun , Yang Dan 
Published: December 2019

Abstract
According to the changing characteristics of the geological environment of Gobi desert pollution abatement area, this paper introduces a kind of milling vehicle of 3point supporting type. The general equilibrium equations under the simultaneously surmounting obstacle by front wheels were derived using a simplified obstacle surmounting mechanical mode. As in a complex environment, the key terrain obstacle parameters are uncertain and the traction force to surmount the obstacle is also uncertain. This paper uses fuzzy sets method for terrain angle and the traction force needed by the vehicle to surmount the obstacle was calculated. By establishing a wheel-road model and using multi-dynamics software, the simulations showed that the theoretical results were reliable.
Research Progress in Preparation of Graphene
Authors: Wang Yufang 
Published: December 2019

Abstract
Graphene have excellent physical and chemical properties, so the preparation of graphene is becoming the focus of material science research. The main preparation methods of graphene are reviewed, including mechanical stripping, chemical oxidation-reduction, chemical vapor deposition, SiC epitaxial growth, electrochemical and so on. At the same time, the advantages and disadvantages of these methods were discussed. And the development of graphene is prospected.
Basic Research Progress of Promoting Blood Circulation and Removing Blood Stasis Jingfang on Diabetic Nephropathy
Authors: Li Xiaobing , Liu Wen , Wang Xiao , Huang Mingming , Xue Qian , Wang Tian , Cao Yuanyuan , Li Wenjing , Cao Zhaoxia , Han Mian , Luo Linzhao 
Published: December 2019

Abstract
Clinical studies have demonstrated that Jingfang can effectively reduce urine protein and delay the process of DN. Jingfang of promoting blood circulation and removing blood stasis which has a long history in the treatment of diabetic nephropathy. It has many effects such as anti-oxidation, lipid-lowering, and hypoglycemic effect. To this end, this article reviews the basic research progress of the prevention and treatment of DN about Jingfang of promoting blood circulation and removing blood stasis.
Point Cloud Registration Method for Pipeline Workpieces Based On NDT and Improved ICP Algorithms
Authors: Xue Shan , Li Guangqing , Lv Qiongying , Meng Xianyu , Tu Xin 
Published: December 2019

Abstract
A new point cloud registration method based on NDT and improved ICP algorithm is proposed to solve the problem of point cloud registration of laser scanning workpiece position and pose data on industrial pipeline. Firstly, according to the FPFH algorithm, the feature points of point clouds are extracted to reduce the number of point clouds. Then, the normal distribution transformation (NDT) is used to achieve rough registration of point clouds, so that the two point clouds have relatively good initial position and posture. Finally, based on the traditional ICP algorithm, the k-d tree is used to accelerate the search speed of the corresponding point pairs and complete the accurate registration of the point clouds. The proposed algorithm and the NDT+ICP algorithm are tested respectively, and the results show that the proposed algorithm is faster, with lower error and fewer iterations, which provides a reference for similar problems.
A Method for Real-Time Suppression of In-Phase Error of Silicon Micro Gyroscopes
Authors: Liang Jie , Qiu Anping , Zhao Yang , Xia Guoming , Shi Qin 
Published: December 2019

Abstract
This paper reports a method to suppress the in-phase error of silicon micro gyroscopes in real time, which can realize long-term stability, without significantly affecting the sensor noise. The in-phase error suppression is by periodically changing the polarity of the drive mode, and the bias (zero rate output) decreases from -7.8deg/s to -3.9deg/s, attenuation amplitude of which is about 3.9deg/s. By sampling the output using information fusion technology, low shirt-time noise and bias instability can be obtained without cutting off the gyroscope and adding additional sensors, the bias instability of which is reduce from 35.0 deg/hr to 10.8 deg/hr. The feasibility of the approach was experimentally evaluated using a MEMS gyroscope with the algorithm implementation on FPGA in real-time.
Sediment Re-Suspension and Release of Dissolved Heavy Metal Cu under Wave Actions
Authors: Zhang Haoqing , Jia Yonggang , Lu Fang 
Published: December 2019

Abstract
Located in the semi-enclosed Bohai Sea, the Yellow River subaqueous delta faces serious pollution by the heavy metal Cu in seabed sediments and is frequently subject to storm surges which further incur sediment re-suspension or even liquefaction, and cause Cu to be released back into seawater. This study performed an indoor wave flume experiment to simulate the release of Cu into overlying water under different hydrodynamic conditions in three phases: static diffusion, seabed nonliquefaction and re-suspension, and seabed liquefaction and re-suspension. As indicated by the results, the concentration distribution of Cu in overlying water was closely related to that of suspended sediment and had consistent change trends. Sediment liquefaction clearly promoted the release of Cu into overlying water, and the dissolved Cu concentrations in the overlying water during the seabed liquefaction and re-suspension phase were 18 times those in the static diffusion phase, and 11 times those in the seabed non-liquefaction and re-suspension phase. In addition, seabed liquefaction caused Cu in sediments to diffuse towards deeper levels, and the diffusion depth of was about half of liquefaction depth.
Study on Manual Tin Welding Technology of Platinum Wire-Copper Wire
Authors: Liu Zhibin , Yin Pu , Wang Zaicheng , Wang Yu , Wang Wei 
Published: December 2019

Abstract
Taking the manual welding of platinum wire and copper wire for spacecraft as the research object, the principle of manual welding of platinum wire and copper wire and the mechanism affecting the welding quality are analysed and studied, and the optimal technological parameters of manual welding of platinum wire and copper wire are optimized through the verification of manual welding process test.
Design and Implementation of Micro Temperature Control System Based on PWM
Authors: Zhu Yajie , Wang Yaxin , Dong Ting , Zhang Peng , Yang Mingming 
Published: December 2019

Abstract
With the application of temperature control system in space remote sensors becoming more and more widespread, and with the increasing demand for high resolution of space remote sensors, the requirement of high precision and miniaturization of the temperature control system of remote sensors is constantly increasing. This paper mainly introduces the working principle of a self-closed micro temperature control system based on UC1825 high-speed pulse width modulation (PWM) controller. According to compare the target temperature with the acquisition temperature, it uses the controller for voltage modulation and outputs PWM pulse width with different duty cycles. And then it controls the on/off of the MOSFET to control the heating time of the controlled object. And finally a self-closed micro-temperature control system based on UC1825 is realized. Currently, the measurement and temperature control performance of the micro-temperature controller on orbit distributedly installed near the controlled object are good.
Emergy Ternary Evaluation of Industrial Agglomeration Area
Authors: Zhao Yu , Miao Yu , Li Lihong , Lu Xu 
Published: December 2019

Abstract
The development status, ecological efficiency and sustainability of two industrial agglomeration systems with different economic and environmental foundations in Liaoning Province were analyzed by using emergy phase diagram analysis method. The results show that the phase diagram analysis method is more systematic and comprehensive in analyzing the development process, current situation and possible future development direction of the system. The emergy phase diagram provides an effective research tool for the emergy analysis method.
Study on Sleeping Sites Selection of Macaque Mulatta at Lu Mountain, Sichuan Province
Authors: Qi Dongming , Zhou Ping , Li Xiaoyan , Li Fengqin , Tang Lin , Zhao Jingang 
Published: December 2019

Abstract
Interview technique, field investigation and quadrat sampling method were used to study the sleeping sites selection by Macaque Mulatta in Lu Mountain, Sichuan Province. 5 sleeping sites selection were recorded in the investigation. 12 quadrates (10m*10m) and 15 habitat factors were measured and calculated with principal component analysis. The results showed that the characteristics of the sleeping sites were the area of 1600m-1700m, the middle slope position of slope land with slope of 20°- 40°, certain macrophanerophytes density, the average DBH of the sleeping tree were less than 15 cm, the sleeping height were less than 6 m, the theropencedrymion with medium concealment, less disturbed human activities. The principal component analysis showed that the first 6 factors contributed 82.242% of the total variance reflecting the characters of the sleeping sites. It was indicated that the main ecological factors affecting the sleeping sites of the Macaca mulatta in Lu Mountain were terrain, sleeping height, feeding point distance, road distance, human interference distance, concealment, slope direction, etc.
Research on Sharing Bicycle Service Quality Evaluation Based on Improved IPA
Authors: Zhang Yan 
Published: December 2019

Abstract
With the gradual implementation of the standardization and remediation measures of the sharing bicycle market, it is increasingly important for sharing bicycle platform to maintain a competitive advantage by improving service quality. Taking the campus sharing bicycle as the research object, used exploratory factor analysis method to further improve the evaluation indicators through the physical design of the bicycle body and the safety factors of the riding process, and finally established a service quality evaluation index system of 5 dimensions and 20 factors based on SERVQUAL scale. Taking Wuhan University as an example, the Weizhao Deng’s partial correlation coefficient method is used to analyze the improved IPA model, and the priority of the improved factors is refined. On this basis, some suggestions are provided for improving the quality of sharing bicycles services.
Research on operation strategy optimization method of multi-energy complementary new energy generation system
Authors: Wang Liying , Zeng Ming , Cao Yuwei , Tian Shi , Xu Xuefeng , Yang Jun 
Published: December 2019

Abstract
Qinghai province has a rich variety of energy, how to make the multi-energy complementary new energy generation system better participate in the multi-type market trading has become an important issue. Can complement each other in this article, through analysis of new energy power generation system in power generation, FM, load, and the structure of the secondary market, as well as benefits, build scenery storage and participate in ancillary service market strategy optimization model, and through the empirical analysis to study the electricity trading and energy storage and heat in peaking and frequency modulation strategy and returns, help to Qinghai province to carry out the pluripotent complementary new energy power generation system involved in kinds of market transactions, as the nationwide can complementary and new energy power generation system in many model driven market transactions.
Power Regulation Strategy of Virtual Pumped Storage Power Station Based on Compressed Air Energy Storage
Authors: You Jiayu , Jiang Tong 
Published: December 2019

Abstract
The virtual pumped storage power station based on compressed air energy storage combines compressed air energy storage and pumped storage technology organically, complements each other’s advantages, and adopts efficient hydraulic equipment to compress air. In the process of power regulation, the head of high-pressure pool is controlled to be constant, the efficiency of pump-turbine unit is improved, and the power station is operated efficiently and steadily. In this paper, a 1 MW pumped storage power station is designed, and the power regulation strategy for stable operation of power generation and electric conditions is put forward. The mathematical model of each module of the power station is established. According to the power regulation instructions, the ideal values of the operation parameters of the power station are calculated, and the regulation instructions are given to the driving equipment of the hydraulic transformer. The running process of the hydraulic piston and the fluctuation of the head of the high-pressure pool are also simulated and analyzed, which verifies the feasibility of the strategy.
Investigation of Heat Transfer Characteristics on Rod Fastening Rotor
Authors: Li Yiping 
Published: December 2019

Abstract
In order to study the contact heat transfer characteristics on the joint interface of the distributed rod fastening rotor under the influence of different pretension and the roughness of different wheel disk. The thermal contact resistance fractal model on the joint interface of the distributed rod fastening rotor is established, and the thermodynamic calculation of the rod fastening rotor is carried out. A contact heat transfer characteristic test rig for the rod fastening rotor is designed and built. The temperature field of the rod rotor is measured with the change of the tension force of the pull rod and the surface roughness of the wheel. The results show that the heat transfer coefficient of the joint interface increases with the increase of the pretension of the rod, and decreases with the increase of the surface roughness of the wheel. The thermal contact resistance fractal model of the joint interface is verified, and it is proved that it is suitable for the study of the thermal contact resistance on joint interfaces.
Bimodal Fitting of Atomic Hydrogen Spectrum in Hydrogen-argon Mixed Gas Plasma
Authors: Luan Bohan , Zhao Yongpeng , Zhao Weijiang 
Published: December 2019

Abstract
In the research field of new energy sources, hydrogen energy has become the same green energy as solar energy and wind energy. Fractional hydrogen atom is a hypothesis of a new atomic state, which proposes that under the action of certain catalysts (such as Ar+) hydrogen atoms of ground state can transit to the energy level of fractional principal quantum number that lower than the ground state energy level, and releases a lot of energy at the same time. The results of this study are as follows, fitting the measurement results of the hydrogen Balmer α line, and by which obtaining the bimodal structure of the spectrum. The analysis of the fitting results shows that the bimodal structure well explains that the hydrogen atoms in the hydrogen-argon plasma can be divided into two components: high temperature and low temperature, and the more accurate fitting line of the hydrogen atom spectrum broadening can be obtained by this fitting method.
Fracture Analysis of the Main Valve Stem in the Steam Turbine
Authors: Qiao Lijie , Fang Lulu 
Published: December 2019

Abstract
The failure analysis of the main valve stem in the steam turbine made of 2Cr12NiMo1W1Vis presented.The failure of the main valve stem in the steam turbine occurred at 11 operating years.Several examinations were carried out to identify the main valve stem failure’s root cause: macroscopic inspection, chemical composition analysis, hardness test, metallographic analysis, mechanical properties analysis.It is found that there are multiple cracks in the fracture of the valve stem. From the lines, it can be seen that the cracks develop from the inner wall of axial and radial holes to the outer diameter of the valve stem, and finally break in the outer wall of the four quadrals.The material performance of the valve stem is lower than the reference standard GB/T 8732-2014 and the manufacturer’s requirements, which is the internal factors of the valve stem fracture. The axial cross opening of the valve stem and the center of the axial inner hole do not coincide with the valve stem center. Local stress concentration and additional stress are the external (mechanical) factors of the valve stem fracture.It is suggested to contact steam turbine manufacturers to optimize the valve stem structure, to avoid the influence of axial cross orifice stress concentration, and to avoid the factor that may produce additional stress; Check and accept valve stem in strict accordance with manufacturer’s standard, including but not limited to valve stem material quality certificate, geometric dimension review, spectrum, etc.
Parameter Identification of Lithium Iron Phosphate Battery Model for Battery Electric Vehicle
Authors: Wang Shang , Chen Qingzhang , Wang Kang , Wang Zhengyi , Wang Yao 
Published: December 2019

Abstract
The third-order equivalent circuit model of battery electric vehicle lithium iron phosphate battery has been established. According to the characteristics of lithium iron phosphate battery in charging and discharging process, the data of open circuit voltage change during battery test were used to identify the third-order equivalent circuit model parameters. The joint simulation of lithium iron phosphate battery discharging based on NEDC operating condition was carried out by using MATLAB and ADVISOR software. The lithium iron phosphate battery was tested on the power battery test platform. The results show that the maximum relative error between the value of simulation and test is small. The trend of the simulation and test curve is in good agreement. Moreover, the characteristics of the lithium iron phosphate battery are described well by the third-order equivalent circuit model. The results demonstrate that the third-order equivalent circuit model has high accuracy.
Sitting Posture Recognition Based on OpenPose
Authors: Chen Kehan 
Published: December 2019

Abstract
Sedentary and poor sitting posture can damage the health of adolescents. Therefore, it is very practical to effectively detect the sitting posture of students in the classroom and to warn the bad sitting posture. This paper proposed an in-class student sitting posture recognition system based on OpenPose, which uses the monitor in the classroom to detect the sitting posture of the students, and uses OpenPose to extract the posture feature. Keras deep learning framework is used to construct the convolutional neural network, which is used to train the datasets and recognize sitting posture of students. Experiments show that the accuracy is more than 90% after 100 epoch training.
Design of Gas Early Warning System Based on Bluetooth Technology
Authors: Jing Haowen 
Published: December 2019

Abstract
Gas alarm has now become a kind of home necessary products, but most gas alarms on the market integrate concentration monitoring and alarm functions in one part, mainly installed in the kitchen. For people who rest in the bedroom, they cannot be informed of the danger in time, which may lead to serious consequences. Taking this hidden danger into account, a warning system that can simultaneously alarm the kitchen and the bedroom was designed. The system uses Bluetooth technology as the communication basis with two STC89C52 single-chip microcomputers as the CPU to realize the function of delivering the concentration information obtained by the kitchen to the bedroom, and thus achieve the sound and light alarm in multiple positions.
Research on Optimization Scheduling Simulation System of Electric Vehicle Charging Station Based on CPLEX Model Technology
Authors: Sun Yizhe 
Published: December 2019

Abstract
The construction of intelligent charging and replacement grids for electric vehicles, such as centralized charging stations, charging and replacement stations, and charging piles, is a more reasonable business model for the large-scale development of electric vehicles in densely populated areas. For the charging mode of centralized charging and unified scheduling, it is necessary to consider the influence of the FM capacity service decision to ensure the orderly charging of the charging station under the power market situation. Based on this background, the thesis aims at maximizing the revenue of electric vehicle charging stations. Based on the CPLEX simulation model for the charging period optimization of electric vehicle charging stations, the paper fully considers the synergistic scheduling of the energy market and the current FM market. The rod optimization model uses three methods of disordered charging, centralized control charging, and distributed charging to compare its influence on the daily load curve. The final paper validated the versatility and reliability of the policy system and helped to complete the orderly scheduling of the electric vehicle charging station.