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作战对抗仿真模型
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作者 刘毅 刘川禾 《火力与指挥控制》 CSCD 北大核心 2007年第8期87-88,共2页
提出一种新的仿真方法,在基于这种方法的仿真模糊中同时考虑了参加对抗的所有作战单位。为确定各个作战单位在作战单位在作战对抗中的开火先后次序,提出了射权概率与射权值两个新的概念。根据兵器自身的性能进行射击目标的确定,在确定... 提出一种新的仿真方法,在基于这种方法的仿真模糊中同时考虑了参加对抗的所有作战单位。为确定各个作战单位在作战单位在作战对抗中的开火先后次序,提出了射权概率与射权值两个新的概念。根据兵器自身的性能进行射击目标的确定,在确定对目标的命中情况及毁伤情况这两个问题上均采用蒙特卡洛方法,以上几种方法使仿真模型能较好的反映作战对抗的现实情况。 展开更多
关键词 作战对抗 仿真模型 射权值 射权概率
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Hepatitis C virus in Pakistan:A systematic review of prevalence,genotypes and risk factors 被引量:12
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作者 Yasir Waheed Talha Shafi +1 位作者 Sher Zaman Safi Ishtiaq Qadri 《World Journal of Gastroenterology》 SCIE CAS CSCD 2009年第45期5647-5653,共7页
In Pakistan more than 10 million people are living with Hepatitis C virus (HCV), with high morbidity and mortality. This article reviews the prevalence, genotypes and factors associated with HCV infection in the Pakis... In Pakistan more than 10 million people are living with Hepatitis C virus (HCV), with high morbidity and mortality. This article reviews the prevalence, genotypes and factors associated with HCV infection in the Pakistani population. A literature search was performed by using the keywords; HCV prevalence, genotypes and risk factors in a Pakistani population, in Pubmed, PakMediNet and Google scholar. Ninetyone different studies dating from 1994 to May 2009 were included in this study, and weighted mean and standard error of each population group was calculated. Percentage prevalence of HCV was 4.95% ± 0.53% in the general adult population, 1.72% ± 0.24% in the pediatric population and 3.64% ± 0.31% in a young population applying for recruitment, whereas a very high 57% ± 17.7% prevalence was observed in injecting drug users and 48.67% ± 1.75% in a multi-transfused population. Most prevalent genotype of HCV was 3a. HCV prevalence was moderate in the general population but very high in injecting drug users and multi-transfused populations. This data suggests that the major contributing factors towards increased HCV prevalence include unchecked blood transfusions and reuse of injection syringes. Awareness programs are required to decrease the future burden of HCV in the Pakistani population. 展开更多
关键词 Hepatitis C virus PREVALENCE GENOTYPES Blood transfusions INJECTIONS
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