首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   672篇
  免费   34篇
管理学   46篇
民族学   2篇
人口学   73篇
理论方法论   76篇
综合类   8篇
社会学   382篇
统计学   119篇
  2023年   6篇
  2022年   4篇
  2021年   3篇
  2020年   21篇
  2019年   34篇
  2018年   20篇
  2017年   26篇
  2016年   21篇
  2015年   18篇
  2014年   13篇
  2013年   157篇
  2012年   28篇
  2011年   22篇
  2010年   13篇
  2009年   11篇
  2008年   13篇
  2007年   16篇
  2006年   12篇
  2005年   14篇
  2004年   11篇
  2003年   9篇
  2002年   7篇
  2001年   18篇
  2000年   15篇
  1999年   19篇
  1998年   14篇
  1997年   14篇
  1996年   16篇
  1995年   12篇
  1994年   17篇
  1993年   12篇
  1992年   15篇
  1991年   13篇
  1990年   3篇
  1989年   7篇
  1988年   2篇
  1987年   6篇
  1986年   6篇
  1985年   6篇
  1984年   6篇
  1982年   2篇
  1981年   3篇
  1980年   4篇
  1979年   3篇
  1978年   2篇
  1977年   2篇
  1975年   2篇
  1974年   2篇
  1973年   3篇
  1966年   2篇
排序方式: 共有706条查询结果,搜索用时 15 毫秒
701.
Elizabethkingia spp. are common environmental pathogens responsible for infections in more vulnerable populations. Although the exposure routes of concern are not well understood, some hospital-associated outbreaks have indicated possible waterborne transmission. In order to facilitate quantitative microbial risk assessment (QMRA) for Elizabethkingia spp., this study fit dose–response models to frog and mice datasets that evaluated intramuscular and intraperitoneal exposure to Elizabethkingia spp. The frog datasets could be pooled, and the exact beta-Poisson model was the best fitting model with optimized parameters α  = 0.52 and β = 86,351. Using the exact beta-Poisson model, the dose of Elizabethkingia miricola resulting in a 50% morbidity response (LD50) was estimated to be approximately 237,000 CFU. The model developed herein was used to estimate the probability of infection for a hospital patient under a modeled exposure scenario involving a contaminated medical device and reported Elizabethkingia spp. concentrations isolated from hospital sinks after an outbreak. The median exposure dose was approximately 3 CFU/insertion event, and the corresponding median risk of infection was 3.4E-05. The median risk estimated in this case study was lower than the 3% attack rate observed in a previous outbreak, however, there are noted gaps pertaining to the possible concentrations of Elizabethkingia spp. in tap water and the most likely exposure routes. This is the first dose–response model developed for Elizabethkingia spp. thus enabling future risk assessments to help determine levels of risk and potential effective risk management strategies.  相似文献   
702.
703.
Local labor market supportability is becoming an increasingly important issue for the United States Army Reserves. As military bases close and Reserve units are consolidated at fewer Reserve centers, the appropriate reassignments of units to Reserve centers require accurate measures of the ability of local labor markets to support such consolidations. A two-stage random effect model is applied to evaluate the geographical extent of the labor market for Army Reserve centers. In the first stage model, a lognormal distribution is used to describe the commuting distance behavior of the Reserve center members. In the second stage model, we estimate the mean of log transformed commute distance as a function of regional characteristics of the Reserve center. An iterative weighted stepwise selection method is used to find a set of characteristics that adequately predict variation of the mean commute distance over Reserve centers. The resulting model is used as inputs to location and market assessment models to assist the marketing decisions of the Army Recruiting Command.  相似文献   
704.
Variable time work is no longer abnormal in the post-industrial economy and is accelerating due to digitisation and the COVID-19 pandemic. Previous studies have revealed a causal relationship between working time variability and work–life balance at the individual level; however, there has been less discussion of the role of the institutional context. This study examines the interplay among childcare policy, schedule control, and its relationship with work–life balance. We conducted a multilevel analysis using the European Working Conditions Survey. The analyses revealed that childcare policy has a U-shaped relationship with work–life balance for female variable time workers without schedule control. In contrast, workers with schedule control and male workers did not have a curvilinear relationship with the outcome. Our analyses imply that sufficient childcare intervention and its interaction with schedule control are necessary to offset the negative effect of childcare services on work–life balance.  相似文献   
705.
706.
Three conceptual and methodological issues of the preceding paper by Bonoma and Johnston are identified and discussed. A theoretical integration of interpersonal trust and locus of control is made, and some necessary conditions for an interpersonal trust-relevant decision-making situation are pointed out. Implications for the design of future research into trust-relevant decision making are drawn.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号