bluuebunny/crossref_metadata_2025_split huggingface dataset:
Non-positive Face Chin Detection Method Based on Curve Fitting
Authors: Xu Zhengqi , Shen Tianfei 
Published: December 2019

Abstract
The head recognition system needs precise contours of the face area, whereas the non-positive face color contours often contain neck areas, which will seriously affect the extraction of contour features. Therefore, the neck area in the outline of the human face needs to be removed to obtain the final facial contour. In this paper, the chin curve is fitted based on the extremum of the contour features of the left and right sides of the human chin region, and then the neck area can be removed. The experimental results show that the method proposed in this paper can obtain the non-positive face profile without the neck.
Research on Error Correction Method of Massive Data Based on Arbitrary Partition Area
Authors: Bai Runqing , Xin Yong , He Xin , Huang Wensi , Lu Xin , Chen Jing 
Published: December 2019

Abstract
With the continuous construction of intelligent power grids, a large amount of data on power grid operation, production management and market operation have been accumulated in power systems, which are affected by factors such as collection, communication, and environment. There are quality problems in terms of integrity, consistency, and effectiveness of data. In this paper, by studying the characteristics of massive data and data anomaly identification method, a method of error correction for massive data in power grid based on arbitrary partition area is proposed. Taking abnormal data as the center and dividing the area based on the network topology structure, the abnormal data of the network is corrected layer by layer to achieve the purpose of improving the data quality.
Design of integrated test system for current/frequency conversion circuit
Authors: wang Yaya , Jia Yajuan , Liu Junhui 
Published: December 2019

Abstract
In order to quickly and accurately measure the performance parameters of the current/frequency conversion circuit (I/F conversion circuit) of inertial navigation system, an I/F conversion circuit test system is designed. Constant current signal, sinusoidal current signal and transient step current signal are provided to the measured system by a program-controlled constant current source. Through the designed frequency measurement circuit, the output frequency signal is measured accurately, the static, dynamic and transient responses of three kinds of I/F converter circuits are analyzed.
Experimental Study on Low-load Sliding Pressure Operation of Supercritical Unit
Authors: zheng Wei , Shang Panfeng , Guo Junshan , Han Yue , Zhu Lingkai , Lao Jinxu , Li Li , Ding Junqi , Ma Yihe 
Published: December 2019

Abstract
This work reports the variation of the heat rate (HRT) and the efficiency of the high-pressure cylinder by the test of the operation mode of different control valves of the first home-made supercritical 660MW unit. The heat consumption rate and high pressure cylinder efficiency of sequential valve operation are better than that of single valve operation, especially heat consumption rate and high pressure cylinder efficiency are quite different under low-load condition of 400MW and 500MW. Above 600MW, the economic indexes of sequential valve operation and single-valve operation with three-valve are similar, of which the heat rate and the efficiency of high-pressure cylinder are better than that of single-valve operation with four-valve. When the unit adopts the sliding pressure operation mode at the load ranging from 360MW to 550 MW, the optimal sliding pressure operating curve is different from the designed curve. According to the analysis of the experimental sliding pressure operating curve and the sliding pressure operation characteristics of the unit, the higher main steam pressure can be used to increase the throttling of the governing valve when the operating conditions close to the sliding pressure curve, which can quickly increase the load and enhance the variable load response ability and peak regulation capacity of the unit.
Sliding Mode Variable Structure Control for Three-Phase Three-Wire Active Power Filter
Authors: Chen Cong 
Published: December 2019

Abstract
Based on the established three-phase three-wire active power filter model, a sliding mode variable structure control method is designed. Since the active power filter (APF) is switched by the switching function continuously, a suitable sliding surface is an effective method for improving the current tracking performance. Although the ordinary hysteresis comparison method has the characteristics of fast dynamic response, good robustness and strong adaptability to loads, the chattering phenomenon is serious. In this paper, a new sliding mode variable structure control is constructed by the design of sliding surface. The simulation proved that the designed sliding mode variable structure control method has less chattering and current tracking error than hysteresis comparison, the current contains fewer harmonics after processing. The effect of overall harmonic compensation is better than the ordinary hysteresis comparison method.
Research on Interdisciplinary Characteristics: A Case Study in the Field of Artificial Intelligence
Authors: Li Shuang , Wang Yuefen 
Published: December 2019

Abstract
In order to show the interdisciplinary laws of the subject fields and analyze the interdisciplinary structure of the field and the contents of knowledge research, a clear-structured framework of interdisciplinary feature recognition is constructed. Taking the field of artificial intelligence as an example, this paper analyzes it from the aspects of disciplinary diversity and disciplinary coherence. Disciplinary diversity is characterized by the distribution of disciplines, Shannon entropy and Rao-Stirling index. Disciplinary coherence is based on network analysis, which mainly includes discipline citation network and core, important and marginal discipline-keyword cooccurrence network at a finer granularity level. These two levels more comprehensively show the distribution and flow of discipline knowledge in this field. Through empirical research, it is found that the field of artificial intelligence involves a variety of disciplines, and its interdisciplinary situation evolves over time, forming clusters of disciplines with tight knowledge flow. In addition, the cross-topic domains of disciplinary research are also different. The results show that the framework system has certain reliability and can provide reference for related research.
Research and Implementation of Cache Optimized Query Privacy Protection for Spatio-Temporal Data Based on PGSRQ-PIR
Authors: Qian Lin , Yu Jun , Zhu Guangxin , Xu Mingjie , Pang Hengmao , Mei Feng , Lu Wenda , Wang Lin , Chen Haiyang , Mei Zhu 
Published: December 2019

Abstract
In view of the high redundancy of the nearest node of the Spark based user privacy protection query algorithm CRIP-V, the caching optimization algorithm PCPIR-V-CA is proposed. PCPIR-V has two parallel strategies, row strategy and bit strategy. The bit strategy divides the row into smaller pieces and improves the efficiency while the grid division is to small. The cache optimized algorithm of PCPIR-V first clusters the CPIR data transforms the data into tuples and caches them in each cluster. Finally it calulates the result based on the cached tuples and data. It has about 20 percents improvement than PGSRQ-PIR.
Research on Analytical Monitoring System for Single-Phase Electrical Appliances
Authors: Xue Miyue , Mao Limin , Jiang Feng 
Published: December 2019

Abstract
In view of the limitations of the current domestic power monitoring system, in this paper an intelligent single-phase electrical appliances analysis and monitoring system have been designed.The system takes STM32 as the control core, and the electric energy metering circuit is used to collect signals. The learning and recognition functions of electrical appliances are designed.The whole single-phase electrical appliances analysis and monitoring system can be used to monitor the operation of one or more electrical appliances in the circuit and display specific electrical parameters.The system uses a special measurement chip RN8208G, and the current precision can reach 1 mA. It is reliable, suitable for long-term operation and not easy to make mistakes.In this paper, the design of a specific electrical monitoring system is novel and has broad prospects for development.
A Multi-Level Cache Management Approach of Scientific and Technical Information Data for Electric Power
Authors: Ma Yan , Zou Lida , Qi Dali , Chen Yufeng 
Published: December 2019

Abstract
Scientific and technical information database for electric power becomes indispensable with the development of big data and think tank in electric industry. Querying information database is time-consuming and cache management is an efficient solution. In the paper we focus on a multi-level cache management in order to improve search speed of sci-tech information. The proposed computation method of cached data value considers visiting volume, data size and user experience, which is accurate for choosing key words and caching device. Our caching management framework consists of four modules, and the used machine learning method could effectively predict the number of visits next period for key words. The experiments demonstrate that our proposed MLCM approach performs better in prediction accuracy rate, query time and user experience than traditional statistic, LRU, LFU algorithms.
Research and Implementation of Machine Learning Classifier Based on KNN
Authors: Wang Lishan 
Published: December 2019

Abstract
Machine learning classifier is an important part of pattern recognition system; it is also an important research field of machine learning. The main research object of this paper is K data mining (KNN, K Nearest Neighbor) classification method, using KNN to classify the data, and compare the classification results. The research work of this paper mainly discusses the implementation of KNN-based machine learning classifier, mainly focusing on the theoretical analysis of K-data mining, algorithm implementation, and implementing KNN-based machine learning classifier.
Analysis of the Application of Electronic Technology in Engineering Area
Authors: Li Yin 
Published: December 2019

Abstract
As a relatively new production technology in engineering technology, electronic technology can optimize and improve the complicated and tedious production process in the past, and then achieve the goal of reducing manpower and material resources and improving productivity. For this reason, this paper will discuss the application and analysis of wireless remote monitoring system and automobile machinery production, and elaborate the design and analysis of the system in the application analysis of wireless remote monitoring field, and enumerate the relevant theoretical basis. But the automobile production machinery aspect mainly focuses on the remote control system design, through the actual content carries on the research to the electronic technology application in the engineering domain.
Finite Element Analysis and Modeling of Three-Phase Induction Motor
Authors: Ding Zhilin , Bu Wenping , Cai Xing , Wu Xiaojiang , Liu Shuhua 
Published: December 2019

Abstract
As mentioned in this paper that three-dimensional and two-dimensional model of the motor is established and three-dimensional structure of the motor is proposed. The finite element structure of the two-dimensional motor is analyzed by using the two-dimensional finite element analysis method combined with a motor example. The finite element parameters of the motor are designed, and the state parameters of the motor involving flux diagram, magnetic line diagram, magnetic density vector diagram and magnetic density cloud diagram are obtained.
Construction of Safety Protection System for Power Industrial Control System and Enhancement Design of Communication Protocol
Authors: Wang Xiaoqiang , Zhao Rui , Yu Xuehai , Zhang Jinye 
Published: December 2019

Abstract
The safe and stable operation of the power system has always been a common problem related to social stability and economic development in the world. To adapt to the development of “Internet +" and energy Internet, to ensure the information security of the power industrial control side, the power industrial control system Information security raises higher requirements. First, the ICS communication model is abstracted, the security risks and threats faced by ICS are sorted out, the most urgent and critical security requirements are clarified, and then a communication enhancement scheme is designed without affecting functions, efficiency, and rapid deployment. This includes one-way authentication and integrity checking of critical communication messages, combined with a timestamp mechanism and registration mechanism. Finally, through the security analysis of the enhanced scheme, it proves that it can resist common attacks such as camouflage, tampering and replay.
Dynamic Analysis of the Flapping Mechanism of Flapping Wing Aircraft
Authors: He Wei , Zhang Ruikun , Sun Lei , Chen Xu , Luo Xiao 
Published: December 2019

Abstract
In order to improve the design level of bionic flapping-wing aircraft, it is necessary to find out the influence of load undulating moment on the motor under the action of air undulating moment. This paper takes flapping-wing aircraft with a crank and rocker mechanism as a flapping mechanism as an example. Firstly, the kinematics model of the flapping mechanism is established, and the relative motion parameters are obtained. Secondly, the dynamic model of flapping-wing aircraft is deduced by using Lagrange dynamic equation. Then, based on the strip method, the aerodynamic moment of air to flapping aircraft is calculated, and the obtained aerodynamic moment is substituted into the dynamic model of the system, to calculate the torque fluctuation on the crank during the flapping flight of flapping aircraft by MATLAB. Finally, in order to verify the correctness of the model, ADAMS software is used to simulate the system, and the simulation results are consistent with the calculated results of the model, thus proving the correctness of the model.
High-accurate Resistance Measurement Method for Sensor Circuit
Authors: Chen Xiaoming , Li Tianze , Zhao Danna , Zhu Huichao 
Published: December 2019

Abstract
An accurate resistance measuring circuit which is used complementary measurement and input compensation to make radiometric method as ideal as possible and reduce the influence that OAs’ stray terms results based on radiometric method and dual-slope ADC circuit is proposed to solve the problem that we can’t balance the precision and detection range of resistance measurement. The accuracy of method is almost related to the reference resistor. It can be calculated that the resistances near the reference resistance measurement error is less than 0.02% after using the complementary measurement under the high-precision OAs, and the measurement error is an order of magnitude smaller after using the input compensation. It is shows that the measurement error could be less than 1% with non-precision OAs. This circuit can be widely applied to sensor circuit.
Design and Simulation of Two Phase Doubly Salient Permanent Magnet Machine with a Dual Stator Structure
Authors: Shen Jie , Mei Lei 
Published: December 2019

Abstract
A new type of doubly salient permanent magnet machine with a dual stator structure is proposed. The motor is designed by staggering two stators by 45°on a 4/6 pole structure of double-salient pole motor. The motor has the advantages of high power density, small pulsation and high efficiency. The basic structure and working principle of the motor are introduced. The air-gap flux is calculated by the simple magnetic circuit method. The no-load magnetic field distribution, air gap flux density and permanent magnet Flux, back EMF, inductance characteristics of the machine are analyzed by using finite element simulation software. The inherent cogging torque of permanent magnet machine is analyzed. The simulation results verify the rationality of the new structure machine.
Research on Sidelobe Suppression Method in LFM Pulse Compression Technique
Authors: Wang Guofu , Tang Tiantian , Ye Jincai , Zhang Faquan 
Published: December 2019

Abstract
System sensitivity and range resolution are a pair of contradictory performance during target detection. In this paper, pulse compression is used to resolve the contradiction between range resolution and sensitivity. A frequency leak occurs in the compressed signal, so that weak targets of the matched filter output may be masked by adjacent strong target side lobes. It is common to suppress the side lobes by adding a window function. Through MATLAB simulation, it is found that when the signal-noise ratio is large, after adding the window function, the small target submerged by the large target side lobes cannot be detected. In this paper, an adaptive pulse compression (APC) technique based on minimum mean square error (MMSE) is used to suppress side lobes. The simulation proves that APC algorithm suppresses side lobes more effectively.
Dynamic Characteristics of Transformer Housing under Rigid/Flexible Foundation
Authors: Cao Hao , Zhang Wanfu , Gu Qianlei , Wu Xiaowen , Hu Sheng , Lu Ling , Peng Jiwen 
Published: December 2019

Abstract
This paper presented the dynamic characteristics of transformer housing under rigid/flexible foundation conditions based on finite element method. The deformation and stress distribution were analyzed due to interior excitations. The dynamic response for different stiffness coefficients was also investigated. Results show the maximum deformation of the housing occurs at the top of high pressure bushing with the value of 132.6μm. And the maximum equivalent stress occurs at the junction between the steel bar and the supporting steel frame with the value of 18.5 MPa. The velocity, stress and deformation at the measuring point show a periodic response, besides the response frequency is consistent with the exciting force. Foundation stiffness has a great influence on the dynamic response of the transformer housing. The amplitude of equivalent stress decreases with the decreasing foundation stiffness, while the amplitude of deformation shows an opposite trend.
Several Strategies for Anti-Multiple-Access Interference of Ground Equipment in Spread Spectrum Measurement and Control
Authors: Yang Liu , Jing He 
Published: December 2019

Abstract
In this paper, the inter-symbol interference problem of multi-objective mode for single-station measurement of ground equipment in spread spectrum measurement and control is obtained from the autocorrelation, cross-correlation, primitive polynomial selection method and three-object code between 10-level m-sequence and Gold code. Interference test and other aspects have been analyzed and discussed. Combined with the problem of small satellite star time-sharing signal level changes causing wrong lock and long time of re-trapping, the strategy of using ground-spreading measurement and control equipment is proposed.
Physics’ identification of formation process of wood polymer heat insulation material
Authors: Saldaev V A , Gusev V G , Koryakin A R 
Published: December 2019

Abstract
The article presents and describes in detail the physical picture of the process of forming the created wood-polymer insulation material in vacuum. It is proved that the developed material is a multicomponent system in which wood particles form a strong adhesive bond with a polyurethane foam matrix, characterized by complex physical and chemical reactions that occur in the process of interaction of all components of the system. Since the process of forming polyurethane foam occurs in the presence of wood filler, its influence on the process of gas phase formation during polymer foaming was studied. The main technological parameters affecting the formation of strong intermolecular bonds and the interaction of the components of wood-polymer insulating material with each other are revealed. In particular, it was found that the process of polymerization of polyurethane foam in the presence of wood filler under vacuum allows one not to deform or destroy the gas-structural elements during their formation. Also, basing upon the results of experimental studies, the dependence of the influence of wood filler moisture on the process of structure formation of the created material was established.
Influence of silica-containing materials surface properties on concrete structuring processes
Authors: Yadykina V V , Grichanikov V A , Akimov A E 
Published: December 2019

Abstract
The paper observes positive the influence of silica containing materials on cement systems. Practical and ecological parameters are shown. The data of a number and types of exchanges centers resulted from milling of industry-related materials are reported. Analysis of exchanges centers influence on cement hydration activity and “cement-mineral surface” contact zone interaction is provided. Theoretical justification of quartzitic sandstone and magnetic separation waste application as raw material for fillers is created. The influence of fillers surface on concrete structuring based on concrete plastic strength research is studied. It is determined that industry-related quartz-containing fillers application in amount 15 to 40% by weight of cement increases the plastic strength of cement paste and the speed of hydration processes. The period of structure formation of the cement stone is shortened, the intensity of hydrate accumulation processes increases. These data confirm the results of x-ray phase analysis of cement stone samples. A large amount of low and high basic capacity hydrosilicates is discovered during magnetic separation waste and quartzitic sandstone application. The use of the researched materials as fine fillers in cement concrete allows obtaining a composite with improved physico-mechanical characteristics and durability.
To issue of studying mechanism of increasing strength of porous ceramic crock
Authors: Mavlyuberdinov A R , Gaynutdinov I Kh , Evstigneeva Yu V 
Published: December 2019

Abstract
In our country at the modern stage of the development of constructional industry the necessity arises in qualitative ceramic wall materials. The use of this items provides durability, comfort and architectural expressiveness for constructions. In connection with what is an acute problem of use of “low-grade” clay raw material for production of high-quality wall ceramic products. The solution of problem is to activate clay raw materials in various ways. One of relatively simple, effective and economically expedient methods of the activation of clay raw material is mechanical activation. It is used to improve the quality of dense metamorphisized clay raw materials. But it is not enough, therefore it is offered to hold extra chemical activation by adding chemical additives in raw mixtures. The purpose of present research is to study mechanism of increasing the strength of the ceramic crock affected by the fluxing additive, imputed in raw mixtures proportion based on medium-plastic clay raw materials. To achieve the given purpose, it is necessary to solve the following tasks: a) to investigate influence of fluxing additives on rheological raw mix behavior; b) to study modification mechanism of changing the properties of ceramic crock by adding fluxing additive into the raw mixtures.