DEStech Transactions on Materials Science and Engineering最新文献

{"title":"The Influence of Different Blade Outlet Angle and Wedge Groove on the Performance of the Double Suction Pump","authors":"Yuejin Yuan, Chenzhao Ma, Yingying Xu, Dong Wang, G. Ren, Qiankun Zhao","doi":"10.12783/DTMSE/AMEME2020/35550","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35550","url":null,"abstract":"This study aims to significantly improve the performance of the centrifugal pump by designing a wedge grooves on the outside of the impeller cover, and investigating the method for determining the blade outlet angle that plays important roles in the energy conversion. The solidliquid two-phase flow fields with the designed pump and an original pump were numerically simulated in the ANSYS-FLUENT. Compared with the original pump, reducing the blade outlet angle can effectively improve the sand-water wear on the blade surface and opening wedge grooves can slow down impeller ring wear. The head of the improved model pump decreases by about 1.5% and the efficiency increases by about 1.5%.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77700008","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 and Optimal Design of Antenna System's Forced Performance","authors":"B. Tang, Jinwei Wang, Yihan Zhong, Qian Zhang, Jianguo Cai","doi":"10.12783/DTMSE/AMEME2020/35525","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35525","url":null,"abstract":"The application of antenna system is becoming more and more widely. With the increasing demand for active phased array radar antenna, a kind of antenna array and antenna structure system for active phased array radar antenna is designed. According to the engineering requirements, the structural scheme is specifically designed, and the static analysis under static load and dynamic under random load are carried out by using finite element analysis software The mechanical analysis verifies the excellent mechanical properties of the structure scheme, the accuracy of engineering accuracy and the excellent ability to bear random load. This paper puts forward a kind of platform optimization scheme which applies prestress to antenna platform, and proves the rationality of the scheme through calculation.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"26 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91406244","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":"Minimal Feedback Vertex Sets in Honeycomb Networks","authors":"Xueli Su, Haizhen Ren","doi":"10.12783/DTMSE/AMEME2020/35567","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35567","url":null,"abstract":"A vertex subset of a graph G is called a feedback vertex set if its removal results in an acyclic subgraph. The feedback vertex number ( ) G  is the cardinality of the minimum feedback vertex set of G , which is an important parameter of interconnection network topology. In this paper, we determine the feedback numbers of Honeycomb mesh n HM and Honeycomb torus n HT , i.e. 2 ( ) 9 / 2 15n/2 4 n HM n     and 2 / ( 2 ) 9 9 / 2 2 n HT n n     . Comparing these results with those of Zhou, we find that ( ) H  is related to the boundary of Honeycomb network H .","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"250 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91519811","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":"Research on IFML Modeling Considering Session Data","authors":"B. Lou","doi":"10.12783/DTMSE/AMEME2020/35569","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35569","url":null,"abstract":"The IFML standard does not include the concept of session data, which makes it sometimes difficult for the IFML model to accurately describe the source, destination, formation, and sharing of data for various elements of the web application front end. By extending the IFML metamodel, this paper introduces three new concepts and elements: Session Data, Using Session Data Flow and Providing Session Data Flow. The Using Session Data Flow points from the session data element to the interaction flow element, indicating that the interaction flow element uses the session data. The Providing Session Data Flow points from the interaction flow element to the session data element, indicating that the interaction flow element initializes or updates the Session data. Case studies show that the introduction of these three new elements in IFML model will make the representation of other interaction flow elements more intuitive, accurate and logical.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86014723","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 of DLC Formation with Ion-Beam Assisted Magnetron Sputtering Deposition","authors":"Kai Huang, Haibo Guo, Yigang Chen","doi":"10.12783/DTMSE/AMEME2020/35536","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35536","url":null,"abstract":"TiC-containing DLC films are deposited by magnetron sputtering by means of ion beam deposition using acetylene as carbon source. The deposition rate of the films is three times as fast as that by ion beam deposition alone. The minimum roughness is 2.2 nm and the highest hardness is 11.97 GPa for the synthesized DLC films. The effects of ion beam voltage and deposition temperature on the composition, microstructures, and surface states are studied using infrared spectroscopy, XRD, Raman spectroscopy, and AFM. Mechanical properties of the DLC films from nanoindentation tests are analyzed with the variation of H and TiC, as well as content of sp bonds.","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":"84701471","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":"Cracks Forming and Propagation Mechanism for the Q345 Steel during Cooling","authors":"Lijun Xu, Yong Shuai, J. Yuan, Shu-lan Zhang","doi":"10.12783/DTMSE/AMEME2020/35530","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35530","url":null,"abstract":"Cracks always occur for the Q345 steel during cooling, which usually lead to Welding failure. Through investigation of the cracks forming position and propagation path, its forming and propagation mechanism for the melted Q345 steel during cooling was studied in detail by using of SEM, EBSD and Nano Indenter equipment in this paper. SEM observation results imply that cracks mainly initiated at martensite phase region close to basal material. Moreover, it also can be observed that the cracks always propagated along the martensite lath or packets boundaries, but not the original prior austenite grain boundaries. The hardness differences between cracks adjacent positions and matrix is about 2.48 GPa, which is larger than that of melted region and matensite (0.70GPa). In addition, EBSD results show that the average prior austenite grains boundaries angles (30-50o) are always smaller than that of martensite lath and packet boundaries (>50o). Combining investigation of the cracks forming position, propagation path and microstructure misorientation, it proves that the occurrence of the cracks at junction of martensite phase region close to basal material is related with larger hardness difference or larger residual stress between martensite and ferrite, while cracks propagation path is controlled by the boundaries angles or local misorientation. The cracks incline to propagate along or deflect to large martensite lath and packets boundaries.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87920884","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":"Promote the Development of Integrated Energy Service Industry with Platform Mode","authors":"Yazong Mai, Gaoqi Dai, Jie Li","doi":"10.12783/DTMSE/AMEME2020/35582","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35582","url":null,"abstract":"In recent years, integrated energy service industry has entered a stage of rapid development in China. Quantities of domestic energy companies and technology companies have deployed and expanded integrated energy service businesses. Moreover, integrated energy services based on the platform model is currently a development direction that has attracted much attention. This article analyses the development status and trends of the domestic platform market of integrated energy service. We also study on the functional positioning and development mode of building an integrated energy service platform. Then we propose the main services functions and business scenarios of the platform. Finally, this paper puts forward relevant suggestions to promote the development of integrated energy service industry platform. As the energy revolution, digital revolution, and industrial revolution continue to crossintegrate, new development concepts such as green and low-carbon, \"Internet +\", and digital transformation have accelerated their penetration into the energy sector. And integrated energy services have become an important development direction to improve energy efficiency, reduce energy costs, and promote competition and cooperation. Facing the huge market of integrated energy services, domestic advanced enterprises have built integrated energy service platforms. With the application of new technologies such as cloud computing, big data, the internet of things, mobile internet, artificial intelligence\", an integrated energy data information network will be built to master and operate user data. It can not only explore and innovate products of integrated energy service, but also better meet customers’ needs and enhance core competitiveness in the market. 1 Development status of the integrated energy service market Currently, the domestic integrated energy service market has the following characteristics: First, the integrated energy service involves a wide range of business types. It is comprehensive and covers a wide range, including basic energy sales such as electricity, gas and heat. It also includes basic distributed energy projects such as plan, design, construction and operation of distributed photovoltaic, cooling, heating and power generation of natural gas, biomass boilers, energy storage, heat pumps, etc. In addition, it","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":" 572","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91410049","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 Running Pattern Recognition Algorithm for Publish/Subscribe Distributed Systems","authors":"Wen-Jen Wu, Zhuowei Shen, Defeng Wang","doi":"10.12783/DTMSE/AMEME2020/35562","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35562","url":null,"abstract":"Publish/subscribe distributed systems are often used in critical applications. It is necessary to monitor their running patterns in real time to detect abnormal status. Therefore, identifying the normal running pattern is the precondition of monitoring publish/subscribe distributed systems. Based on Apriori algorithm, this paper presents a weighted frequent itemset mining algorithm for running pattern recognition of publish/subscribe distributed systems. By introducing the transaction matrix, the algorithm only needs to scan the transaction database once. By weighting the items from two aspects of influence and frequency, the support of the items with few occurrences but much importance can be improved, so that the running pattern containing small frequency events can be mined out. Experimental results show that the algorithm can effectively mine the running patterns, and has better performance than Apriori algorithm and FP-growth algorithm.","PeriodicalId":11124,"journal":{"name":"DEStech Transactions on Materials Science and Engineering","volume":"104 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80671438","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 Study on Total Energy Production, GDP, Total Investment in Fixed Capital and Population in Shandong Province","authors":"Zhiwei Zhang, Bing Li","doi":"10.12783/DTMSE/AMEME2020/35573","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35573","url":null,"abstract":"This paper is to aim at analysing the responses of total energy production from the impulses of GDP, total investment in fixed assets and population in Shandong. The impulse response function analysis indicates that Shandong energy production will be greatly influenced by the GDP impulses in the short run and the influences from total investment in fixed capital assets is the smallest in the short run. The influence of total energy production by the population is rather medium compared with the GDP and investment in fixed capital assets. So we can see that GDP growth will greatly influence total energy production. It is necessary for administration to pay attention to the GDP growth as concerning the planning of total energy production.","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":"78765098","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":"An Overview on the Main Technical Processes of Restriction-Site Associated DNA Sequencing (RAD-Seq)","authors":"Liao QingQing, Momo Li, Jiefei Qiu, Chen Fenfen, Chen Min, Qilin Wang, Guangyu Li, Guo Aiwei","doi":"10.12783/DTMSE/AMEME2020/35548","DOIUrl":"https://doi.org/10.12783/DTMSE/AMEME2020/35548","url":null,"abstract":"Restriction site-associated DNA sequencing (RAD-seq) is a critical enabling genotyping method based on whole-genome restriction sites developed on the basis of second-generation sequencing and nowadays is widely applicable to a variety of biological problems in many species where traditional cytogenetic methods have failed. As sequencing costs have dropped, RAD-Seq has moved from being primarily a SNP discovery tool to being a method for high-throughput genotyping of populations. In this paper, the main technical processes of RAD-seq has been briefly summarized and great potential will been hold to clarify more development and application in researches.","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":"77645498","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}