AASRI Procedia最新文献_第7页

Implementation of Decision-making Methods in Intelligent Automated Educational System Focused on Complete Individualization in Learning 基于学习完全个性化的智能自动化教育系统决策方法的实现

AASRI Procedia Pub Date : 2014-01-01 DOI: 10.1016/j.aasri.2014.05.010

Victor Uglev

引用次数: 5

The Developmental Changes of mRNAs Expression Levels of GHSR Gene in Sheep 绵羊GHSR基因mrna表达水平的发育变化

AASRI Procedia Pub Date : 2014-01-01 DOI: 10.1016/j.aasri.2014.05.018

Zhiguo Huang, Chunhui Wei, Huibo Luo, Minghong Bian, Jie Deng, Yanmei Liu

{"title":"The Developmental Changes of mRNAs Expression Levels of GHSR Gene in Sheep","authors":"Zhiguo Huang, Chunhui Wei, Huibo Luo, Minghong Bian, Jie Deng, Yanmei Liu","doi":"10.1016/j.aasri.2014.05.018","DOIUrl":"10.1016/j.aasri.2014.05.018","url":null,"abstract":"<div><p>Different age group of Male Kazak sheep and Xinjiang fine wool sheep were used in the current study to investigate the developmental changes of GHSR mRNA expression. After measurement of body weight, hypothalamus and pituitary were sampled to extract total RNA for determining the abundance of GHSR mRNA by RT-PCR and real-time PCR. The results indicated that: (1) For both breeds, body weight among different ages was significantly different (P<0.05), and from day 30 to 90, the Kazak's was notable higher than the Xinjiang's (P<0.01); (2) Hypothalamus GHSR mRNAs expression level increased firstly and then declined with growing in both breeds. From day 60 to 90, the mRNAs expression level of the Kazak was extremely higher than that of the Xinjiang (P<0.01); (3) Pituitary GHSR mRNAs expression level increased with growing in both breeds, and was highly positively correlated with the cumulative growth curves. From day 2 to 90, the pituitary GHSR expression level of the Kazak was extremely higher than that of the Xinjiang (P<0.01). The results predicated that it may be pituitary GHSR but not hypothalamus GHSR through which ghrelin influenced sheep growing.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"6 ","pages":"Pages 123-130"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.05.018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89676351","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: 1

Simple Model Based Dead Time Compensation Using Fast Current Measurement 基于快速电流测量的简单模型死区补偿

AASRI Procedia Pub Date : 2014-01-01 DOI: 10.1016/j.aasri.2014.09.023

Andras Futo, Istvan Varjasi

{"title":"Simple Model Based Dead Time Compensation Using Fast Current Measurement","authors":"Andras Futo, Istvan Varjasi","doi":"10.1016/j.aasri.2014.09.023","DOIUrl":"10.1016/j.aasri.2014.09.023","url":null,"abstract":"<div><p>Nowadays the increasing utilization of alternative energy sources demand three phase power converters capable of delivering high quality energy to the low voltage grid. Good dead time compensation hardware and software are essential to keep low order harmonics at acceptable levels even at light load conditions, at acceptable costs. Low current waveforms with multiple zero crossings within a switching period are still problematic with today's technology. Such operating conditions often happen in PWM inverters and in variable frequency drives at or below 10% load. This paper describes a new method which uses a model for calculating the voltage error caused by dead time for each phase leg. The method is completely software based, but requires fast current measurement. A model splits each half period of the triangular carrier to time segments where the slopes of the currents in all phases, and the output voltage of all semiconductor phase legs are constant. It determines the duration of each of the time segments, and integrates the volt-seconds for a half period of the triangular carrier. The model is capable of handling discontinuous conduction as well. The resulting error voltage can be used to calculate a new, compensated duty factor which can be applied to the PWM modulator. The described algorithm was tested via computer simulation. A comparison was made with other, previous methods using the same inverter model.</p></div>","PeriodicalId":100008,"journal":{"name":"AASRI Procedia","volume":"9 ","pages":"Pages 146-151"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.aasri.2014.09.023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78280617","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: 7

Vehicle Dynamics Conversion into Power (Dynapower) 车辆动力转换为动力(Dynapower)

AASRI Procedia Pub Date : 2014-01-01 DOI: 10.1016/j.aasri.2014.05.025

Habib Nasser

引用次数: 5

The Logic to Quantify Operation of Social Regulation 社会规制量化运作的逻辑

AASRI Procedia Pub Date : 2014-01-01 DOI: 10.1016/j.aasri.2014.05.034

Mei-ping Liu

引用次数: 0

The Hierarchical Network Topology Management System based on Managed Object and View Mechanism 基于被管对象和视图机制的分层网络拓扑管理系统

AASRI Procedia Pub Date : 2014-01-01 DOI: 10.1016/j.aasri.2014.09.004

Hui-Qin Jin, Man-Gui Liang