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.
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：
[Wang Qing-liang; Yu Run-lan; Qiu Guan-zhou] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China.;[Ding De-xin; Wang Qing-liang; Hu E-ming] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
通讯机构：
[Wang Qing-liang] C;Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China.
会议名称：
24th International Mineral Processing Congress (IMPC)
会议时间：
SEP 24-28, 2008
会议地点：
Beijing, PEOPLES R CHINA
会议主办单位：
[Wang Qing-liang;Yu Run-lan;Qiu Guan-zhou] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China.^[Wang Qing-liang;Ding De-xin;Hu E-ming] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
sulfate reducing bacteria;in-situ leaching of uranium;radioactively contaminated groundwater;bioremediation
摘要：
In the case of in-situ leaching of uranium, the primitive geochemical environment for groundwater is changed since leachant is injected into the water bearing uranium deposit. This increases the concentration of SO_4~(2-), uranium and other heavy metal ions and results in the groundwater contamination. The effects of pH values of the simulated solution on the reduction of SO_4~(2-) and the removal of uranium and other heavy metal ions by sulfate reducing bacteria(SRB) were studied. The results show that, when the pH value of the simulated solution is about 8, the reduction rate of SO_4~(2-) by SRB and the removal rate of uranium, Mn~(2+), Zn~(2+), Pb~(2+) and Fe~(2+) will reach their highest values. A bioremediation technique for remediation of groundwater in in-situ leaching uranium mine can be developed.
作者：
Ye Yongjun*;Ding Dexing;Zhou Xinhuo;Li Xianinang
期刊：
PROGRESS IN SAFETY SCIENCE AND TECHNOLOGY, VOL VII, PTS A AND B,2008年7:2447-2450
通讯作者：
Ye Yongjun
作者机构：
[Ye Yongjun; Li Xianinang; Ding Dexing; Zhou Xinhuo] Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Ye Yongjun] U;Univ S China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China.
会议名称：
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
会议时间：
2008-09-24
会议地点：
北京
会议论文集名称：
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)论文集
关键词：
uranium mine;dummy driving drift;maximal driving length;ventilation;radon and its progeny
摘要：
For giving some references to improve radiation condition of dummy driving drift in underground uranium mines, this paper expounds the mathematical description of radon concentration and potential alpha energy of its progeny in ventilation airflow, and educes the calculation formula of the maximal driving length of dummy driving drift for exhausting radon and its progeny. Then, this paper studies the relationships between the maximal driving length (L(max)) and air-quantity of ventilation system for dummy driving drift (Q), section area of dummy driving drift (S), radon concentration of intake air (C(0)), potential alpha energy of radon progeny (E(0)) of intake air and radon emanation density of dummy driving drift (D(v)) respectively, and obtains the below conclusions (i) L(max) is decreases with increased C(v), E(0), S and D(v) respectively, on the contrary increases with increased Q, (ii) when D(v)=1.463 Bq/(m(3)s), L(max,Rn)=L(max,alpha); when D(v)<1.463Bq/(m(3)s), L(max,Rn)>L(max,alpha); when D(v)>1.463 Bq/(m(3)s), L(max,Rn)<L(max,alpha). In this paper some optimization measures of reducing radon and its progeny also are given.
作者机构：
[Qinghai Luo; Zehua Liu] School of Urban Construction,University of South China
会议名称：
The First International Conference on Building Energy and Environment
会议时间：
2008-07-13
会议地点：
中国辽宁大连
摘要：
The steady state thermodynamic properties were compared between real thermoelectric and compression refrigeration systems. The irreversible losses of a thermoelectric refrigeration system represent th
