摘要：
This paper presents a new approach based on maximum entropy and maximum entropy Markov model for web information extraction. This approach is not only able to overcome the shortcoming of the less precision and recall of the hidden Markov model. In addition, this approach can make the most of various kinds of contextual information from web. The experiments are found that the hybrid approach has an average precision rate of 87.516% while the hidden Markov model trained by the Baum-Welch algorithm has an average precision rate of 68.630%. This implies that the hybrid approach is more optimized than the hidden Markov model trained by the Baum-Welch algorithm.
作者机构：
Department of Environment Science and Technology, HuNan University, ChangSha 410082, China;Faculty o;Faculty of Architectural Engineering and Environment, NanHua University, HengYang 421001, China
会议名称：
第十届室内空气品质和质量国际学术会议(Proceedings of the 10th International Conference on Indoor Air Quality and Climate)
会议时间：
2005-09-04
会议地点：
北京
会议论文集名称：
第十届室内空气品质和质量国际学术会议
关键词：
hospital wards;airborne microbe;central air conditioning
摘要：
The airborne microbes of two groups of hospital wards (one equipped with central air conditioning, ACW; the other was naturally ventilated, NVW) were measured simultaneously for two months. The results indicated that during air-conditioning the airborne microbial contamination in ACW was more serious than that in NVW: the average bacterial concentration of ACW (535 CFU/m3) was about 1.2-fold greater than that of NVW (438 CFU/m3), and the average fungal concentration in ACW (174 CFU/m3) was about 1.5-fold greater than that of NCW (113 CFU/m3). Of the sampled bacteria, 80％ were found to be gram positive, and the dominating genera of fungi was found to be Cladosporium and Penicillium. Cladosporium was the highest percentage of the total concentrations, but in the ACW the percentage of Cladosporium (58.2％) was higher than that in NCW (48.6％). In ACW, the airborne microbial concentration was the highest after air conditioning started for about 30 minutes, the maximal concentration measured was 3352 CFU/m3,which was about 4-fould greater than that of average concentration (709 CFU/m3). The reasons were analyzed and some recommendations were also offered.
作者机构：
Department of Computer College of Automation and Engineering;Henan Textile College;South China unive;Department of Mathematics;Zhengzhou University Zhengzhou, 450052, P.R.China
会议名称：
第三届国际脉冲动力系统及应用学术会议
会议时间：
2006-07-21
会议地点：
青岛
会议论文集名称：
第三届国际脉冲动力系统及应用学术会议论文集
摘要：
This paper mainly deals with the exponential stability of a class of linear time-varying slowvarying systems which A(t) is continuous but not differentiable. I.e. we only require that A(t) is Lipschitz continuous. Some theorems to extend the slow-varying condition from smooth case to nonsmooth case are established. Furthermore, when the linear systems add to disturbing terms, corresponding theorem is shown.
作者机构：
Dispatching Center,Guangzhou Power Supply Bureau,Guangzhou,510620 College of Power,South China Unive;Dispatching Center,Guangzhou Power Supply Bureau,Guangzhou,510620
会议名称：
2008 China International Conference on Electricity Distribution (CICED 2008)(2008中国国际供电会议)
会议时间：
2008-12-10
会议地点：
广州
会议论文集名称：
2008 China International Conference on Electricity Distribution (CICED 2008)(2008中国国际供电会议)论文集
关键词：
Reliability analysis;Secondary equipments;Optimum routine test interval
摘要：
Based on foundational data in secondary equipments management Information System, self-test effectiveness index, maintenance index and repairing index are introduced, and Markov model of secondary equipments reliability analysis is developed in this paper. Furthermore, the software to calculate the optimum routine test interval of secondary equipments is compiled. Reliability index and optimum routine test interval of secondary equipments are calculated. The impact of self-test effectiveness index and maintenance index on secondary equipments reliability index are analyzed. Secondary equipments reliability can be dynamically evaluated through the adapter to secondary equipments Management Information System, which is of great theoretical significance and practical value and improves the function and management of secondary equipments.
作者机构：
[凌晖] Cancer Research Institute,University of South China
会议名称：
2008年中国病理生理学会第十一届肿瘤和第十二届免疫专业委员会学术会议
会议时间：
2008-10
会议地点：
中国福建厦门
摘要：
<正>AIM:To investigate the change of cell cycle checkpoint kinases Chkl/2 in human gastric cancer MGC803 cells induced by DADS (diallyl disulfide).METHODS:mRNA expression was assayed by means of RT-PCR
