{"title":"An Accurate and Fast Global Map-Matching Approach for Low-Sampling-Rate GPS Trajectories","authors":"Mao Du, Lin Yang, Jingni Yuan","doi":"10.1109/IFEEA51475.2020.00150","DOIUrl":"https://doi.org/10.1109/IFEEA51475.2020.00150","url":null,"abstract":"Current global matching algorithms for low-sampling rate data still face the challenges of large computational costs and significant declines in accuracy with increases in the sampling interval time. Therefore, this paper proposes a novel global map-matching algorithm based on the hidden Markov model to match the data accurately and quickly. First, we utilize the road accessibility instead of the gridding or confidence intervals to obtain the candidate information. Then, this algorithm synthetically considers the trajectory location at the previous and next moments of the current trajectory point to establish the candidate paths. Finally, this algorithm calculates the transition probability through a similarity calculation between the spatial-temporal position of the candidate paths and the GPS trajectory. The accuracy, calculation time and stability of the proposed algorithm are verified systematically. For different sampling intervals, compared with the testing algorithms, the proposed algorithm improves the mean accuracy by a minimum of 3.3% and a maximum of 32.4% for different sampling intervals. The computational efficiency of the proposed algorithm is significantly improved by 3–391 times. It provides a new method for the development and analysis of low-sampling rate data.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116984426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Analysis of Factors Affecting the Dehydration Effect of Centrifugal Dehydrator","authors":"Xiaolei Dong","doi":"10.1109/ifeea51475.2020.00044","DOIUrl":"https://doi.org/10.1109/ifeea51475.2020.00044","url":null,"abstract":"According to the operating features of the centrifuge, this study analyzes the main factors affecting its dehydration effect. At the same time, this study also derived the relationship between the dehydration effect and its main factors, analyzing how the main factors affect the dehydration effect, and carried out practical verification. The final results show that the sieve basket with high rotating speed, high trepanning rate and reasonable clearance of components are beneficial to improve the dehydration effect. In addition, the improvement of the trepanning rate of sieve basket has a significant influence on the enhancement of dehydration effect.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115385487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A System Function Verification Flow For Mixed-signal SoC","authors":"Yiru Fu, Kun Huang, Lang Zhang, Fan Liu","doi":"10.1109/IFEEA51475.2020.00157","DOIUrl":"https://doi.org/10.1109/IFEEA51475.2020.00157","url":null,"abstract":"Taking a mixed-signal SoC project as an example, this article introduces an efficient system function verification flow applied to mixed-signal SoC. All the inherited analog IPs in this project are developed in virtuoso environment, and the digital modules are simulated in VCS environment. The system function verification platform of this project uses UVM(Universal Verification Methodology) to generate digital stimulus and Verilog-AMS to generate analog stimulus. The overall circuit is transformed into spectre-netlist and integrated into the verification platform. The project has high requirements on the development and simulation progress. The system function verification is realized by using simulation tools VCS and XA of Synopsys. The results of the project are correct, which shows the effectiveness of the flow.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115432892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Corrosion response of Mg-Ca alloy as a bone tissue substitute biomaterial","authors":"Song Yuwei, Qiao Yang, Wei Yukun","doi":"10.1109/IFEEA51475.2020.00058","DOIUrl":"https://doi.org/10.1109/IFEEA51475.2020.00058","url":null,"abstract":"The calcium content in the binary as-cast Mg-xCa alloy will affect the microstructure and mechanical properties of the alloy. In this study, five magnesium alloys with different calcium content were prepared by casting process. Then, the five kinds of alloy components were tested and the microstructure was observed, and the change trend of the hardness of the as-cast alloy was obtained with the increase of Ca content. The corrosion resistance of the as-cast magnesium alloy was tested by electrochemical experiments and corrosion immersion experiments. It is found that the addition of an appropriate amount of Ca can increase the hardness of the magnesium alloy and improve the corrosion resistance of the magnesium alloy. It is concluded that the corrosion resistance of magnesium alloy can be controlled by controlling the calcium content.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123551082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Application of Transformer Modeling Based on Pseudo-flux Characteristic in DC Bias","authors":"Bo Han, Shiming Liu, Tianqi Nan","doi":"10.1109/IFEEA51475.2020.00087","DOIUrl":"https://doi.org/10.1109/IFEEA51475.2020.00087","url":null,"abstract":"Problems related to DC bias of HVDC transmission affect the reliability of transformer differential protection. By expressing the newly defined “pseudo-flux characteristic” in terms of exponential function, a new method is proposed to discriminate fault under DC bias. Pseudo-flux characteristics are obtained through inrush current, the parameters of which are determined by differential evolution algorithm (DE). The test of the pseudo-flux characteristics acquisition method is completed on the single-phase transformer in the laboratory. The method of acquiring pseudo-flux characteristics is simple and has high accuracy in the saturation interval. In addition, a simulation of DC bias magnetism was built in PSCAD, and the magnetic flux characteristics of inrush current, DC bias and faults were compared. It illustrates the feasibility of using the transformer pseudo-flux characteristic model to protect in such scenarios and the superiority compared with the second harmonic restraint method.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124850369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Understanding the Power System in the Development of Intelligent Building","authors":"Li Sixuan","doi":"10.1109/ifeea51475.2020.00061","DOIUrl":"https://doi.org/10.1109/ifeea51475.2020.00061","url":null,"abstract":"With the widespread use of computer science and electronic information technology, intelligent building has been developing at a fast pace, pointing out the future direction for construction industry and attracting wide range of investigation in subdivided fields. This paper concentrates mainly on the electric system in intelligent building, which is divided into various sections. Having a review on two main sections, power supply and distribution system and wireless sensor networks system, this paper discusses concrete issues these systems are in face of. In power supply and distribution system, harmonic suppression, reactive power compensation and overvoltage protection are required simultaneously to maintain the stable operation as well as the efficiency of the system. In wireless sensor networks system, by virtue of its precision and fragility, strengthening anti-interference capacity of the connected sensors not only physically, but also in the information transmitting area is what deserves researching. Based on that, latest measures to these issues are listed respectively in this article, reflecting the forefront developing direction and providing concise references to investigators interested in this field.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121554765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development Status and Key Technology Analysis of Water Reactive Metal Powder Fuel Power Plant","authors":"Liu Mingtai, Xia Zhixun, Huang Liya","doi":"10.1109/IFEEA51475.2020.00109","DOIUrl":"https://doi.org/10.1109/IFEEA51475.2020.00109","url":null,"abstract":"The water-reactive metal powder fuel engine uses high-energy metal powder as fuel, water as oxidant, taking advantages of high specific impulse, adjustable thrust, simple structure, safety and reliability. It is one of the new generation of underwater power plants with great development potential. Based on the current power requirements of underwater vehicles, this paper briefly compares the technical characteristics of water-reactive metal powder fuel power plants with other power plants, and clarifies its future development prospects. The development status and key technology research progress of water-reactive metal powder fuel power plant are summarized, and its future research direction is clarified.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121690075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tao Zhang, Bo Ni, Jiliang Zhao, Bin Cao, Haifeng Luo, Hongbo Li, Liangjun Zhang
{"title":"Error Analysis and Test Research on Space Brake Torque Measurement","authors":"Tao Zhang, Bo Ni, Jiliang Zhao, Bin Cao, Haifeng Luo, Hongbo Li, Liangjun Zhang","doi":"10.1109/IFEEA51475.2020.00117","DOIUrl":"https://doi.org/10.1109/IFEEA51475.2020.00117","url":null,"abstract":"The space brake is an important part for the stable adjustment of spacecraft motion attitude, which can convert the impact force into internal force consumption to stabilize spacecraft orbit attitude. In order to select the brake whose brake torque is within a reasonable range, it is necessary to measure the brake torque in the simulated space state. In this paper, the torque measurement method of space brake is studied, and the measurement error is analyzed; an effective method to reduce the error of torque measurement is raised, and the experimental measurement method is used for checking and verification. At last, the differences between the theoretical analysis and the test measurement results are compared, and the design elements are given, which paves the way for the subsequent test platform optimal design as well as development and production of products.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129620024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Improvement of frequency performance of fully differential operational amplifier for switched-capacitor application","authors":"Xunyu Li","doi":"10.1109/IFEEA51475.2020.00009","DOIUrl":"https://doi.org/10.1109/IFEEA51475.2020.00009","url":null,"abstract":"In recent years, switched-capacitor (SC) structure has been widely used in many electronic fields, such as analog to digital converter (ADC) and digital to analog converter (DAC). The vital part in the SC structure is operational amplifier (Op-Amp), to improve the performance of SC structure, a good operational amplifier is necessary. In this paper, based on 0.18µm process, we proposed two types of differential Op-Amps: traditional differential structure and fully differential telescopic structure. Aiming to realize better frequency performance, we compared this two types and find out the telescopic structure has much better unity gain bandwidth (UGBW) up to 690MHz with similar small signal gain and phase margin.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127960155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"AMSR-E soil moisture inversion based on GRNN neural network","authors":"Dongyu Li, Weiyi Hou, J. Xu","doi":"10.1109/ifeea51475.2020.00148","DOIUrl":"https://doi.org/10.1109/ifeea51475.2020.00148","url":null,"abstract":"Passive microwave remote sensing data and measured soil moisture content in AMSR-E (Advanced Microwave scanning Radiometer - Earth Observing System) had been adopted for hilly region of Central Sichuan province from 2006 to 2010. Using Tbv6.9, Tbv10.7, Tbv18.7 and Tbh36.5 as input factors, A GRNN neural network was established to retrieve soil water content, and the correlation coefficient between the simulated value and the spatial and temporal sequence of measured soil water was calculated. The results showed that the GRNN neural network's correlation coefficient inversion of soil moisture and the measured soil moisture is relatively higher than the one of soil moisture retrieved by the equation inversion of standard atmospheric transmission and the measured soil moisture. Thus using AMSR-E data based on GRNN neural network model to simulate the soil moisture is feasible.","PeriodicalId":285980,"journal":{"name":"2020 7th International Forum on Electrical Engineering and Automation (IFEEA)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125731361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}