Perspectives in science最新文献_第7页

Diagnosis of airgap eccentricity fault in the inverter driven induction motor drives by transformative techniques 用变换技术诊断变频异步电动机气隙偏心故障

Perspectives in science Pub Date : 2016-09-01 DOI: 10.1016/j.pisc.2016.04.014

Khadim Moin Siddiqui , Kuldeep Sahay , V.K. Giri , Narendra Gothwal

{"title":"Diagnosis of airgap eccentricity fault in the inverter driven induction motor drives by transformative techniques","authors":"Khadim Moin Siddiqui , Kuldeep Sahay , V.K. Giri , Narendra Gothwal","doi":"10.1016/j.pisc.2016.04.014","DOIUrl":"10.1016/j.pisc.2016.04.014","url":null,"abstract":"<div><p>In the present paper, the airgap eccentricity fault of the induction motor has been diagnosed by digital signal processing transformative techniques in the inverter driven induction motor drives. The airgap eccentricity fault has been diagnosed in the transient condition by time domain as well as time-frequency domain techniques with the help of a proposed dynamic simulation model. In the past, many signal processing techniques had been used for various induction motor fault detection purpose such as fast Fourier transform, Hilbert transform, short term Fourier transform, etc. But, all techniques faced some sort of disadvantages. Therefore, in this paper, all shortcomings of the previous used signal processing techniques have been solved by newly wavelet transform's approximation signal. The low frequency approximation signal has been used to diagnose the eccentricity fault in the transient condition. Therefore, early fault diagnosis of the motor is possible and averted the motor before reaching in the ruinous conditions. As a result, the industries may save large revenues and unexpected failure conditions. The obtained results clearly demonstrate that the developed diagnostic technique may reliably separate airgap eccentricity fault in many stages.</p></div>","PeriodicalId":92112,"journal":{"name":"Perspectives in science","volume":"8 ","pages":"Pages 127-131"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.pisc.2016.04.014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90055469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Static economic dispatch incorporating wind farm using Flower pollination algorithm 基于花授粉算法的风电场静态经济调度

Perspectives in science Pub Date : 2016-09-01 DOI: 10.1016/j.pisc.2016.04.045

Suresh Velamuri, Sreejith S, Ponnambalam P

引用次数: 28

Design and development of semantic web-based system for computer science domain-specific information retrieval 基于语义的计算机科学领域信息检索系统的设计与开发

Perspectives in science Pub Date : 2016-09-01 DOI: 10.1016/j.pisc.2016.04.067

Ritika Bansal, Sonal Chawla

{"title":"Design and development of semantic web-based system for computer science domain-specific information retrieval","authors":"Ritika Bansal, Sonal Chawla","doi":"10.1016/j.pisc.2016.04.067","DOIUrl":"10.1016/j.pisc.2016.04.067","url":null,"abstract":"<div><p>In semantic web-based system, the concept of ontology is used to search results by contextual meaning of input query instead of keyword matching. From the research literature, there seems to be a need for a tool which can provide an easy interface for complex queries in natural language that can retrieve the domain-specific information from the ontology. This research paper proposes an IRSCSD system (Information retrieval system for computer science domain) as a solution. This system offers advanced querying and browsing of structured data with search results automatically aggregated and rendered directly in a consistent user-interface, thus reducing the manual effort of users. So, the main objective of this research is design and development of semantic web-based system for integrating ontology towards domain-specific retrieval support. Methodology followed is a piecemeal research which involves the following stages. First Stage involves the designing of framework for semantic web-based system. Second stage builds the prototype for the framework using Protégé tool. Third Stage deals with the natural language query conversion into SPARQL query language using Python-based QUEPY framework. Fourth Stage involves firing of converted SPARQL queries to the ontology through Apache's Jena API to fetch the results. Lastly, evaluation of the prototype has been done in order to ensure its efficiency and usability. Thus, this research paper throws light on framework development for semantic web-based system that assists in efficient retrieval of domain-specific information, natural language query interpretation into semantic web language, creation of domain-specific ontology and its mapping with related ontology. This research paper also provides approaches and metrics for ontology evaluation on prototype ontology developed to study the performance based on accessibility of required domain-related information.</p></div>","PeriodicalId":92112,"journal":{"name":"Perspectives in science","volume":"8 ","pages":"Pages 330-333"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.pisc.2016.04.067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76335908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Iron oxide nanoparticles synthesis through a benign approach and its catalytic application 纳米氧化铁的良性合成及其催化应用

Perspectives in science Pub Date : 2016-09-01 DOI: 10.1016/j.pisc.2016.04.054

Henam Sylvia Devi, Thiyam David Singh

{"title":"Iron oxide nanoparticles synthesis through a benign approach and its catalytic application","authors":"Henam Sylvia Devi, Thiyam David Singh","doi":"10.1016/j.pisc.2016.04.054","DOIUrl":"10.1016/j.pisc.2016.04.054","url":null,"abstract":"<div><p>Synthesis of iron oxide nanoparticles was carried out through an environmental benign route using tannic acid as reducing and capping agent. The TEM image shows the details of the poly-dispersity in size of the iron oxide nanoparticle and average diameter of the particles range in between 30 and 50nm. XRD result rule out that iron oxide nanoparticle is a mixed phase constituted by Fe<sup>+2</sup> and Fe<sup>+3</sup> ions. The average size of the particle determined from XRD data is 45.6nm which is agreeable with the finding obtained from TEM images. This particle of iron oxide is used for the degradation of p-cresol and it successfully degraded p-cresol. Catalytic property of the iron oxide nanoparticle was also investigation using methylene blue as role model dye. Degradation of methylene blue dye was studied in presence of NaBH<sub>4</sub> and the degradation reaction followed first order kinetics with rate constant value of 1.6×10<sup>−3</sup>   min<sup>−1</sup>, this result confirmed the catalytic nature of as such prepared iron oxide nanoparticles.</p></div>","PeriodicalId":92112,"journal":{"name":"Perspectives in science","volume":"8 ","pages":"Pages 287-289"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.pisc.2016.04.054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82763703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Experimentation on accuracy of non functional requirement prioritization approaches for different complexity projects 针对不同复杂性项目的非功能需求优先排序方法的准确性实验

Perspectives in science Pub Date : 2016-09-01 DOI: 10.1016/j.pisc.2016.04.001

Raj Kumar Chopra , Varun Gupta , Durg Singh Chauhan

引用次数: 16

“Dhoulath's method” – An investigative probe into mortality rate to aid diagnoses “杜拉斯的方法”——对死亡率的调查调查，以帮助诊断

Perspectives in science Pub Date : 2016-09-01 DOI: 10.1016/j.pisc.2015.12.008

J. Dhoulath Beegum, D. Chithraprasad

引用次数: 9

Effect of axial conduction and viscous dissipation on heat transfer for laminar flow through a circular pipe 轴向传导和粘性耗散对圆管层流换热的影响

Perspectives in science Pub Date : 2016-09-01 DOI: 10.1016/j.pisc.2016.03.008

Mohan Jagadeesh Kumar Mandapati