DEStech Transactions on Materials Science and Engineering最新文献

{"title":"The Extraction of Product Assembly Feature Information for Intelligent Assembly Sequence Planning","authors":"Cui Jiajia, Jiwen Chen, Hong-Juan Yang","doi":"10.12783/DTMSE/AMEME2020/35586","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35586","url":null,"abstract":"The assembly feature information contained in the CAD model of the product is an important basis for the generation of intelligent assembly sequence. Taking the assembly model of the product as the research object, the research on the acquisition of assembly feature information of the product by intelligent assembly sequence planning is proposed in this paper. Microsoft Visual Studio 2005 and SolidWorks API are used as implementation means to access the internal data of the product CAD model and realize the extraction of the hierarchical information, mating relation and mating line and surface assembly features of the assembly model. An application example of product assembly feature information extraction for the locking device of an elevator landing door shows that the established method of acquiring product assembly feature information is effective and provides a theoretical and technical basis for the establishment of product design and assembly sequence planning knowledge base.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77444003","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 Bertalanffy and Logistic Growth Curve Fitting Model in Chicken","authors":"Liao QingQing, Momo Li, Jiefei Qiu, Chen Fenfen, Chen Min, Qilin Wang, Guangyu Li, Guo Aiwei","doi":"10.12783/DTMSE/AMEME2020/35549","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35549","url":null,"abstract":"China is one of the most abundant chicken resources in the world. The local chicken breeds in the \"Chinese livestock and poultry genetic resources Chronicles\" have reached 107. In this paper, the nonlinear growth models have been briefly summarized and recent advances studies using Bertalanffy and Logistic Growth Curve Fitting Model in Chicken have also been reviewed. The significance and problems existing in the study of Bertalanffy and Logistic Growth Curve Fitting Model in Chicken in terms of future chicken research and breeding work were also discussed.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74414103","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":"Computer Technologies for Designing Close- Fitting Apparel with Specific Properties","authors":"Xinzhou Wu, V. Kuzmichev","doi":"10.12783/DTMSE/AMEME2020/35518","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35518","url":null,"abstract":"In this study, based on the 3D scanning technology and virtual simulation, the digital twins of female bodies were adjusted and developed, and a virtual simulation of wetsuit was carried out. The virtual wetsuit was evaluated through the digital twin morphology, and the wetsuit sewing pattern block was optimized through composite material strain and compression value. The experimental tests show that the digital twins of system \"body wetsuit\" based on real data transformation are feasible and practical, and the optimized pattern block guarantees good fit performance.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"23 Suppl 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80304569","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 Design Scheme of Smart Energy Internet","authors":"Chunyan Chen, Guicun Li, De-Tang Li, Gaohai Nong, Xuejing Li, Jinzhuang Lv, B. Huang, C. Yang, T. Chen","doi":"10.12783/DTMSE/AMEME2020/35577","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35577","url":null,"abstract":"Breaking through the limitations of traditional power grid, photovoltaic panels, air source heat pump, ground source heat pump, lithium battery energy storage system, intelligent charging pile and other equipment are installed on the roof of ChengBi campus, and the energy consumption of dynamic distribution units is monitored through the energy management system. To realize the protection of new energy and ecological environment. 1 Project source and background at home and abroad Under the background of over exploitation and utilization of non-renewable energy, and the serious damage to ecological environment caused by large amount of greenhouse gas emissions, a clean energy utilization scheme with solar power generation as the core is studied. It is required to make full use of solar energy to alleviate the environmental problems caused by the use of traditional energy, optimize the power supply and distribution scheme of energy users, and reduce energy waste. The first smart energy Internet system was built in ChengBi campus by making full use of the school's building floor and vacant land area. 1.1 Industry development and market application prospects Photovoltaic application scenarios cover almost all industries, and new energy is the inevitable trend of automotive energy development in the future. According to relevant data, as of the end of last year, the number of charging piles in the country has reached 450,000, an increase of 51% year-on-year. But it is still unable to meet the changing needs of this large number of electric vehicles in my country [1] . Although the driving range of the vehicle has increased and the problems in the charging link have been alleviated to a certain extent, the problem of charging difficulties still exists. With the continuous improvement of photovoltaic and energy storage technology and the maturity of the environment, the \"photovoltaic, energy storage, charging pile\" will be formed into a grid-connected and off-grid energy storage system, photovoltaic off-grid system, micro-grid energy storage system, and photovoltaic grid-connected a microgrid system that combines multiple complementary energy power generation with energy storage and other systems [2] . It is very suitable for use in places where photovoltaics have been self-generated for self-use but cannot be connected to the grid, peak electricity prices","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":"85557988","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 the Effect of Sio2 Film on the Characteristics of Rayleigh Wave in Zno/Sic Structure","authors":"Liu Zhirong, Liqiang Xie, Mine Zhu, Bao Wenqi","doi":"10.12783/DTMSE/AMEME2020/35542","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35542","url":null,"abstract":"The influence of SiO2 film on the phase velocity and the electromechanical coupling coefficient of ZnO/SiC structure was analyzed by finite element method. The results show that the middle SiO2 film layer reduces the phase velocity of Rayleigh wave and significantly increases the electromechanical coupling coefficient. When the top SiO2 film layer thickness is larger than the ZnO film thickness, the Rayleigh wave phase velocity increases. Otherwise, the Rayleigh wave phase velocity decreases. The electromechanical coupling coefficient increases first and then decreases. These conclusions can guide the development of surface acoustic wave devices with high phase velocity and high electromechanical coupling coefficient.","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":"90059780","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":"Study on Parallel Current Sharing Technology of Power Module in DC Charging Pile for Electric Vehicle","authors":"Shuxuan Song, Weifeng Zhang, Jin Zhengjun, Tao Feng, Feng Wang","doi":"10.12783/DTMSE/AMEME2020/35578","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35578","url":null,"abstract":"In order to meet the changing requirements of multiple types of electric vehicles, the layout and development of quick charging and DC charging piles are rapid. The modularized DC charging pile becomes the popular research field. Due to the differences in the parameters of each module in the charging pile, the current assumed by each module in parallel may not be the same, leading to the premature aging and damage of some modules and affecting the service life of the charging pile. In this paper, the isolated full-bridge DC/DC converter is taken as the power module topology, and the parallel current-sharing technology is studied. Two control methods are designed, one is the double-closed-loop cascade control of the voltage outer loop and the current inner loop, and the other is the adaptive double-loop based on charging mode. The current-sharing loop is added in the two controllers and the averaging-current method is adopted and the simulation verification of two-module and four-module in parallel is carried out. Through the comparison of load switching, the advantages of the he adaptive double-loop control method in the multimodule parallel connection, such as large stability margin and fast response speed, are validated.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78458287","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":"Study on Weldability of Aluminium Alloy TL091 in Resistance Spot Welding with Intermediate Frequency and Direct Current","authors":"Lijun Han, Yuanbo Guo, Peng-yu Lin, Gengwei Zhang, L. Zhong, Wei Fu, Changhua Liu","doi":"10.12783/DTMSE/AMEME2020/35537","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35537","url":null,"abstract":"The resistance spot welding with intermediate frequency and direct current (RSWIFDC) was conducted to solve the weldability of the Al alloy TL091, The high-quality joint bearing dynamic load is realized for the first time by using the technique with the power of 2 kHz and the double-transformer based on the rapid response speed and stable welding current. By optimizing the welding process parameters, the strength, hardness distribution, microstructures and fracture morphologies of the joints were analyzed in details. The experimental results showed that the joints welded by the technique had better comprehensive mechanical properties, higher tensile strength and plasticity than that of the joints obtained by other spot welding. Shear fracture of the joints was seen at the nugget instead of the HAZ, thus indicating that the strength at the HAZ is higher than that at the nugget. The plastic ring of the joint was narrower as we desired. It was concluded that, by developing this advanced welding method and optimized welding parameters, high-quality joints were acquired to meet with higher design requirements of body-in-white of Al alloy under dynamic load. This is of great significance to the wide application of Al alloy body.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79502722","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":"Study on the Simulation and Variation Law of Particle Erosion Velocity of Flow Field in Recoil Mechanism","authors":"Kaibo Cui, X. Huang, B. Ning, Yezun Sun, Xinwei Zhang","doi":"10.12783/DTMSE/AMEME2020/35527","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35527","url":null,"abstract":"During the recoil and recoil motion of the gun, the solid particles in the recoil mechanism will repeatedly impact the control ring, resulting in erosion and wear phenomenon, which has become the main cause of the failure of the control ring. By means of fluent software, a two-phase flow model based on liquid-solid coupling is established, and the motion trajectory and erosion velocity of solid particles are calculated by numerical simulation, and the influence of different parameters on particle erosion velocity is studied, which provides reference data for the simulation of controlled ring erosion and the study of wear law. 1 Discrete phase model of particles At present, there are two main solutions to the numerical simulation problem of multiphase flow: Euler-Euler method and Euler-Lagrange method [1,2] . After measuring the old sample, it was found that the volume rate of the particles contained ≤2%. The Euler Lagrange method, which is suitable for calculating particle volume rate less than 10%, is called discrete phase model (Discrete Phase Model, DPM model) in Fluent software. In this model, the fluid is used as a continuous phase to solve the time averaged N-S equation, and the particles in the flow field are regarded as discrete phases. In the numerical simulation of two-phase flow, information such as mass, momentum and energy can be exchanged between discrete and continuous phases. The equations of motion equilibrium for discrete phase particles are as follows: p p d vm p B M s p du m F F F F F F dt       (1) The d F is the drag force of the particle,the vm F is the additional mass force of the particle, the p F is the pressure gradient force, the B F is the Basset (pasteur) force, the M F is the rotating lift force of the particle (magnus), and the s F is the lift force of the Saffman (saffman). Resistance of particles d F is expressed as:","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81264135","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":"Exact Solution of Yu-Toda-Sasa-Fukugama Potential Equation In (3+1) Dimension","authors":"Dongyu Cao, Lifeng Guo","doi":"10.12783/DTMSE/AMEME2020/35568","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35568","url":null,"abstract":"This article solves the Yu-Toda-Sasa-Fukugama potential equation in (3+1) dimension [1-4]. First of all, we carry out the traveling wave transformation on the equation. Then, the equation can be transformed into integral form. At last, we use the complete discrimination system for polynomial [5-12] to obtain all exact solutions of the equation.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"200 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86833718","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":"Solving the Nominal-the-Best Decision-Making Problem by Grey-Fuzzy Linguistic Method","authors":"Kuo-Yan Wang, Jing Yu","doi":"10.12783/DTMSE/AMEME2020/35563","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35563","url":null,"abstract":"This article combines two well-developed notions: the grey relations method (GRM) and fuzzy linguistic scoring technique, for solving the problem of qualitative and quantitative criterions coexistence due to the original GRM being unable to effectively handle the simple qualitativeorientated solution. Further, an empirical process adopting GRM with the fuzzy technique has successfully proved the ratings of every alternative with two types of objectives can be an optimal approach. This conclusion can be utilized to help solve other related computing issues.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90055045","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}