Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35516
Peng Xia, V. Kuzmichev
The aim of this study is to improve the virtual garment simulation in terms of fit prediction and new body measurements application. In our study, fit criteria of the back pattern blocks was established. The important body measurements of neck, shoulder and armhole area were measured on cross-section to evaluate the pattern block. New method of sewing patterns evaluation can be used to check the correctness of blouse pattern block effectively and improve the virtual technology. Keyword: Blouse, Pattern block, Digital twin, Body measurement, Virtual simulation, Fit, Evaluation.
{"title":"Improvement of Virtual Simulation by Means of Sewing Patterns","authors":"Peng Xia, V. Kuzmichev","doi":"10.12783/DTMSE/AMEME2020/35516","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35516","url":null,"abstract":"The aim of this study is to improve the virtual garment simulation in terms of fit prediction and new body measurements application. In our study, fit criteria of the back pattern blocks was established. The important body measurements of neck, shoulder and armhole area were measured on cross-section to evaluate the pattern block. New method of sewing patterns evaluation can be used to check the correctness of blouse pattern block effectively and improve the virtual technology. Keyword: Blouse, Pattern block, Digital twin, Body measurement, Virtual simulation, Fit, Evaluation.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82523269","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}
Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35521
Yimeng Zhao, Haiyang Quan, Zengrong Liu
A frequency divider for a high speed and wide band PhaseLocked-Loop (PLL) which output frequency range is from 6 GHz to 12.5 GHz, is described. The designed mixed-signal swallow pulse divider mainly includes a divide-by-8/9 dual-modulus prescaler which is based on source coupled logic (SCL) structure for achieving high speed frequency division, and a 3-bit swallow counter and an 8-bit programmable counter to achieve wide range division ratio. This divider is fabricated in 65nm CMOS process and the power supply voltage is 1.25 V. The simulation results show that the power consumption of this divider is 5.34 mW. And the divider can achieve a continuous integer division ratio from 72 to 2047 in the PLL tuning range.
{"title":"A High Speed and Wide Frequency Division Range Mixed-Signal Pulse Swallow Frequency Divider for Phase-Locked-Loop","authors":"Yimeng Zhao, Haiyang Quan, Zengrong Liu","doi":"10.12783/DTMSE/AMEME2020/35521","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35521","url":null,"abstract":"A frequency divider for a high speed and wide band PhaseLocked-Loop (PLL) which output frequency range is from 6 GHz to 12.5 GHz, is described. The designed mixed-signal swallow pulse divider mainly includes a divide-by-8/9 dual-modulus prescaler which is based on source coupled logic (SCL) structure for achieving high speed frequency division, and a 3-bit swallow counter and an 8-bit programmable counter to achieve wide range division ratio. This divider is fabricated in 65nm CMOS process and the power supply voltage is 1.25 V. The simulation results show that the power consumption of this divider is 5.34 mW. And the divider can achieve a continuous integer division ratio from 72 to 2047 in the PLL tuning range.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83154129","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}
Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35547
Zeyi Xu, Youyun Xu, Haiming Li
This paper presents the design and results of a planar lens fed by a fan beam H-plane horn antenna. Compared with traditional dielectric lens antenna, planar lens based on metamaterials is composed of several unit cells designed for changing the phase of incident wave. The presented lens is center-fed by a horn antenna located at 100mm from the lens, and the thickness of it is 5mm. The simulation results exhibits a high gain of 30dB at 76.5GHz and a fan-shaped main beam with half-power beamwidths of 1.7° and 4.1° on E-plane and H-plane respectively.
{"title":"Design of a High-Gain Planar Lens Antenna Based on Metamaterial with Fan Beam","authors":"Zeyi Xu, Youyun Xu, Haiming Li","doi":"10.12783/DTMSE/AMEME2020/35547","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35547","url":null,"abstract":"This paper presents the design and results of a planar lens fed by a fan beam H-plane horn antenna. Compared with traditional dielectric lens antenna, planar lens based on metamaterials is composed of several unit cells designed for changing the phase of incident wave. The presented lens is center-fed by a horn antenna located at 100mm from the lens, and the thickness of it is 5mm. The simulation results exhibits a high gain of 30dB at 76.5GHz and a fan-shaped main beam with half-power beamwidths of 1.7° and 4.1° on E-plane and H-plane respectively.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"93 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83825794","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}
Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35588
Rui Guo, Yongjun Peng, Anping Wan
In order to solve the problems of time-consuming, laborconsuming and low accuracy of manual statistical calculation of maintenance interval in current communication equipment operation and maintenance management, a communication equipment condition based maintenance decision-making system based on real-time condition monitoring is proposed. Based on the actual operation status information data of communication equipment in the real-time database, the system uses the life prediction calculation method of communication equipment related components to calculate the service life (operation hours and startup times) under the current state, convert it into the equivalent service life under the benchmark operation conditions, and then compare it with the maximum maintenance life to predict the remaining life Based on the product of maintenance coefficient and service coefficient of line hours and startup times, the concept of equivalent service coefficient is proposed. According to whether the equivalent service coefficient of operation period and forecast period is equal, four maintenance decision-making models are established, and then the specific maintenance opportunity of communication equipment related components is determined.
{"title":"Communication Equipment Maintenance Decision Method Based on Equivalent Service Coefficient","authors":"Rui Guo, Yongjun Peng, Anping Wan","doi":"10.12783/DTMSE/AMEME2020/35588","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35588","url":null,"abstract":"In order to solve the problems of time-consuming, laborconsuming and low accuracy of manual statistical calculation of maintenance interval in current communication equipment operation and maintenance management, a communication equipment condition based maintenance decision-making system based on real-time condition monitoring is proposed. Based on the actual operation status information data of communication equipment in the real-time database, the system uses the life prediction calculation method of communication equipment related components to calculate the service life (operation hours and startup times) under the current state, convert it into the equivalent service life under the benchmark operation conditions, and then compare it with the maximum maintenance life to predict the remaining life Based on the product of maintenance coefficient and service coefficient of line hours and startup times, the concept of equivalent service coefficient is proposed. According to whether the equivalent service coefficient of operation period and forecast period is equal, four maintenance decision-making models are established, and then the specific maintenance opportunity of communication equipment related components is determined.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82349116","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}
Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35558
Zekun Wang, Fuxi Zhang
To solve the fatal limitation of SVMs based on the pre-known, two new image noise filter methods Support Vector Machine based on self-learning machine (SLM-SVM) were presented, which is working better than many other non-linear filters, such as median filters and adaptive filters. A series of comparison and working parameters would be explained, performance of test showed these methods can dealing with the noise in a totally unknown image. And filter out more than 99% noise pixels from an image. In the same time, this kind of filter is still immature due to its long runtime (more than 2 second) and some error cases during testing, some recommendation and prediction were proposed.
{"title":"Two Support Vector Machine Methods for Image Noise Filter","authors":"Zekun Wang, Fuxi Zhang","doi":"10.12783/DTMSE/AMEME2020/35558","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35558","url":null,"abstract":"To solve the fatal limitation of SVMs based on the pre-known, two new image noise filter methods Support Vector Machine based on self-learning machine (SLM-SVM) were presented, which is working better than many other non-linear filters, such as median filters and adaptive filters. A series of comparison and working parameters would be explained, performance of test showed these methods can dealing with the noise in a totally unknown image. And filter out more than 99% noise pixels from an image. In the same time, this kind of filter is still immature due to its long runtime (more than 2 second) and some error cases during testing, some recommendation and prediction were proposed.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"138 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76615818","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}
Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35555
Liu Shuangying, Yixian Guo, L. Long, F. Aamir, Liu Shuhuan, Wenlong Liao, Huang Taiyi, Li Zhuoqi, Zhang Jun, Yuelei Wu
Based on the molecular dynamics method and the simulation toolkit LAMMPS, the distribution characteristics of PKA tracks and the different kinds of point defects in 4H-SiC crystal material induced by 10keV Si PKA with specific incident direction under different temperature conditions were simulated analyzed in this paper. The mechanism of the counts of the various point defects changed with time under a certain temperature (300K) condition is compared and analyzed. Simulation and analysis of the spatial distribution of point defects in the stable stage with PKA track and temperature changes. The results of this paper provide an important basis for further exploring the formation mechanism of 4H-SiC radiation displacement damage defects, predicting the thermodynamic properties of 4H-SiC matrix materials by displacement damage, and the electrical characteristics of 4H-SiC devices/detectors.
基于分子动力学方法和模拟工具包LAMMPS，模拟分析了不同温度条件下10keV Si PKA在特定入射方向下诱导的4H-SiC晶体材料中PKA轨迹的分布特征和不同种类的点缺陷。对比分析了在一定温度(300K)条件下，各点缺陷数量随时间变化的机理。PKA轨迹和温度变化下稳定阶段点缺陷空间分布的模拟与分析。本文的研究结果为进一步探索4H-SiC辐射位移损伤缺陷的形成机理、通过位移损伤预测4H-SiC基体材料的热力学性能以及4H-SiC器件/探测器的电学特性提供了重要依据。
{"title":"Molecular Dynamics Simulation and Analysis the Primary Radiation Damage of 4H-Sic Crystal Material Induced by 10kev Si PKA Under Different Temperature","authors":"Liu Shuangying, Yixian Guo, L. Long, F. Aamir, Liu Shuhuan, Wenlong Liao, Huang Taiyi, Li Zhuoqi, Zhang Jun, Yuelei Wu","doi":"10.12783/DTMSE/AMEME2020/35555","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35555","url":null,"abstract":"Based on the molecular dynamics method and the simulation toolkit LAMMPS, the distribution characteristics of PKA tracks and the different kinds of point defects in 4H-SiC crystal material induced by 10keV Si PKA with specific incident direction under different temperature conditions were simulated analyzed in this paper. The mechanism of the counts of the various point defects changed with time under a certain temperature (300K) condition is compared and analyzed. Simulation and analysis of the spatial distribution of point defects in the stable stage with PKA track and temperature changes. The results of this paper provide an important basis for further exploring the formation mechanism of 4H-SiC radiation displacement damage defects, predicting the thermodynamic properties of 4H-SiC matrix materials by displacement damage, and the electrical characteristics of 4H-SiC devices/detectors.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"500 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77051489","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}
Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35571
Jie-lin Shang, Honemei Pei
{"title":"Research on Engineering Exemplification Teaching Method in Linear Algebra Teaching","authors":"Jie-lin Shang, Honemei Pei","doi":"10.12783/DTMSE/AMEME2020/35571","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35571","url":null,"abstract":"","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78189404","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}
Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35557
Yuting Zhang
Big data analysis has brought convenience to all fields of human life. At the same time, the problem of privacy leakage follows. Protecting user's private data and preventing sensitive information disclosure become urgent problems. However, big data has the characteristics of large amount of data, diversification of types and sources and rapid growth, so the traditional privacy protection technology is more and more unsuitable. The traditional privacy protection mechanism protects the privacy of users, at the same time, it will inevitably reduce the data utility[1]. On the basis of differential privacy knowledge, based on the Nash equilibrium privacy protection mechanism, this paper constructs an interrelated differential privacy model, analyzes and evaluates the game model among multiple data publishers, and proves the correctness of the game analysis.
{"title":"Game Analysis of Privacy Protection Based on Nash Equilibrium in Big Data Environment","authors":"Yuting Zhang","doi":"10.12783/DTMSE/AMEME2020/35557","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35557","url":null,"abstract":"Big data analysis has brought convenience to all fields of human life. At the same time, the problem of privacy leakage follows. Protecting user's private data and preventing sensitive information disclosure become urgent problems. However, big data has the characteristics of large amount of data, diversification of types and sources and rapid growth, so the traditional privacy protection technology is more and more unsuitable. The traditional privacy protection mechanism protects the privacy of users, at the same time, it will inevitably reduce the data utility[1]. On the basis of differential privacy knowledge, based on the Nash equilibrium privacy protection mechanism, this paper constructs an interrelated differential privacy model, analyzes and evaluates the game model among multiple data publishers, and proves the correctness of the game analysis.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76305802","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}
Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35584
Qingyun Zhang, Xinhua Zhao, Tengda Dai
To study the dynamic characteristics of the flexible 3-RRRU spatial parallel robot, the coupling dynamic model of the 3-RRRU spatial parallel robot with both rigid and spatial flexible links in the kinematic chain was established by Adams software. In order to verify the correctness of the established coupling model, the positive kinematic results of the fully rigid 3-RRRU spatial parallel robot and the flexible 3-RRRU spatial parallel robot are compared and analyzed. Based on the coupling model, the driving torque, elastic modulus, and stress are discussed. And the effect of stress distribution on the flexible 3-RRRU spatial parallel robot. The results show that under the same conditions, the trajectory of the geometric center of the end-effector in the two types of models is basically the same, but due to the elastic deformation generated by the spatial flexible link, the trajectory of the end-effector in the coupled model in the x, y, and z directions will fluctuate. The maximum floating values are 3.57 mm, 2.96 mm and 2.05 mm; respectively, therefore, a reasonable modeling of rigid-flexible coupling spatial parallel robots is essential. It can be seen from the coupling model that the maximum stress of the system is mainly concentrated on the geometric center of the spatial flexible link and the joint connected to the rigid link, and the driving torque is asymmetry, which provides a data reference for structural optimization; the greater the elastic modulus, the more obvious the coupling effects, which leads to the enhanced system oscillation.
{"title":"Analysis and Verification of Dynamic Characteristics of Flexible Spatial Parallel Robot","authors":"Qingyun Zhang, Xinhua Zhao, Tengda Dai","doi":"10.12783/DTMSE/AMEME2020/35584","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35584","url":null,"abstract":"To study the dynamic characteristics of the flexible 3-RRRU spatial parallel robot, the coupling dynamic model of the 3-RRRU spatial parallel robot with both rigid and spatial flexible links in the kinematic chain was established by Adams software. In order to verify the correctness of the established coupling model, the positive kinematic results of the fully rigid 3-RRRU spatial parallel robot and the flexible 3-RRRU spatial parallel robot are compared and analyzed. Based on the coupling model, the driving torque, elastic modulus, and stress are discussed. And the effect of stress distribution on the flexible 3-RRRU spatial parallel robot. The results show that under the same conditions, the trajectory of the geometric center of the end-effector in the two types of models is basically the same, but due to the elastic deformation generated by the spatial flexible link, the trajectory of the end-effector in the coupled model in the x, y, and z directions will fluctuate. The maximum floating values are 3.57 mm, 2.96 mm and 2.05 mm; respectively, therefore, a reasonable modeling of rigid-flexible coupling spatial parallel robots is essential. It can be seen from the coupling model that the maximum stress of the system is mainly concentrated on the geometric center of the spatial flexible link and the joint connected to the rigid link, and the driving torque is asymmetry, which provides a data reference for structural optimization; the greater the elastic modulus, the more obvious the coupling effects, which leads to the enhanced system oscillation.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75286310","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}
Pub Date : 2021-04-07DOI: 10.12783/DTMSE/AMEME2020/35587
Xianhang Xu, Kenjie Chen
As an important direction of industrial development, intelligent industry will be the key to upgrade industry and create a new engine for economic growth. Discussing the development of Chongqing’s intelligent industry based on the background of China’s high-quality economic development not only meets the requirements of local development strategies, but also verifies the guiding role of high-quality development theory of industrial development. Through the analysis of the development status and existing problems of Chongqing’s intelligent industry, and then propose suggestions for accelerating the development of Chongqing’s intelligent industry combined with high-quality development connotations.
{"title":"Research on the Development of Chongqing’s Intelligent Industry Based on the Background of China’s High-Quality Economic Development","authors":"Xianhang Xu, Kenjie Chen","doi":"10.12783/DTMSE/AMEME2020/35587","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35587","url":null,"abstract":"As an important direction of industrial development, intelligent industry will be the key to upgrade industry and create a new engine for economic growth. Discussing the development of Chongqing’s intelligent industry based on the background of China’s high-quality economic development not only meets the requirements of local development strategies, but also verifies the guiding role of high-quality development theory of industrial development. Through the analysis of the development status and existing problems of Chongqing’s intelligent industry, and then propose suggestions for accelerating the development of Chongqing’s intelligent industry combined with high-quality development connotations.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74185390","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}
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