全文获取类型
收费全文 | 17107篇 |
免费 | 512篇 |
国内免费 | 15篇 |
专业分类
管理学 | 2202篇 |
民族学 | 101篇 |
人才学 | 2篇 |
人口学 | 1553篇 |
丛书文集 | 176篇 |
教育普及 | 1篇 |
理论方法论 | 1696篇 |
综合类 | 736篇 |
社会学 | 9022篇 |
统计学 | 2145篇 |
出版年
2023年 | 80篇 |
2021年 | 132篇 |
2020年 | 260篇 |
2019年 | 323篇 |
2018年 | 396篇 |
2017年 | 589篇 |
2016年 | 412篇 |
2015年 | 328篇 |
2014年 | 383篇 |
2013年 | 2732篇 |
2012年 | 601篇 |
2011年 | 609篇 |
2010年 | 490篇 |
2009年 | 448篇 |
2008年 | 530篇 |
2007年 | 539篇 |
2006年 | 565篇 |
2005年 | 488篇 |
2004年 | 403篇 |
2003年 | 363篇 |
2002年 | 386篇 |
2001年 | 422篇 |
2000年 | 367篇 |
1999年 | 345篇 |
1998年 | 259篇 |
1997年 | 230篇 |
1996年 | 241篇 |
1995年 | 232篇 |
1994年 | 214篇 |
1993年 | 212篇 |
1992年 | 243篇 |
1991年 | 236篇 |
1990年 | 223篇 |
1989年 | 216篇 |
1988年 | 209篇 |
1987年 | 226篇 |
1986年 | 202篇 |
1985年 | 210篇 |
1984年 | 223篇 |
1983年 | 190篇 |
1982年 | 183篇 |
1981年 | 159篇 |
1980年 | 148篇 |
1979年 | 163篇 |
1978年 | 136篇 |
1977年 | 109篇 |
1976年 | 131篇 |
1975年 | 144篇 |
1974年 | 107篇 |
1971年 | 77篇 |
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
31.
32.
33.
34.
35.
The 'negotiated night': an embodied conceptual framework for the sociological study of sleep 总被引:2,自引:0,他引:2
Robert Meadows 《The Sociological review》2005,53(2):240-254
Sleep is essential for our health and well‐being but it has, historically, been the subject of little sociological study. Yet sleep is not, as common sense would have us believe, ‘asocial inaction’. Like our waking lives, it is a time of interaction. The sociology of sleep presently exists in a state similar to the early stages of development of the sociology of the body, waiting for something like Frank's (1991 ) typology of body action, which served as a heuristic guide through which action and its multifaceted components could be understood. This paper argues that one productive analytical framework is to adapt Watson's (2000 ) ‘male body schema’ for the sociological investigation of sleep. This revolves around four interrelated forms of embodiment: normative (opinions and perceptions about healthy sleep behaviour); pragmatic (‘normal’ as related to social role); experiential (feelings related to sleep); and visceral (the biological body and sleep). The possibilities this model provides for the sociology of sleep is illustrated in the paper through the analysis of a case study of sleep negotiation between a couple. 相似文献
36.
37.
38.
Children may be more susceptible to toxicity from some environmental chemicals than adults. This susceptibility may occur during narrow age periods (windows), which can last from days to years depending on the toxicant. Breathing rates specific to narrow age periods are useful to assess inhalation dose during suspected windows of susceptibility. Because existing breathing rates used in risk assessment are typically for broad age ranges or are based on data not representative of the population, we derived daily breathing rates for narrow age ranges of children designed to be more representative of the current U.S. children's population. These rates were derived using the metabolic conversion method of Layton (1993) and energy intake data adjusted to represent the U.S. population from a relatively recent dietary survey (CSFII 1994–1996, 1998). We calculated conversion factors more specific to children than those previously used. Both nonnormalized (L/day) and normalized (L/kg-day) breathing rates were derived and found comparable to rates derived using energy estimates that are accurate for the individuals sampled but not representative of the population. Estimates of breathing rate variability within a population can be used with stochastic techniques to characterize the range of risk in the population from inhalation exposures. For each age and age-gender group, we present the mean, standard error of the mean, percentiles (50th, 90th, and 95th), geometric mean, standard deviation, 95th percentile, and best-fit parametric models of the breathing rate distributions. The standard errors characterize uncertainty in the parameter estimate, while the percentiles describe the combined interindividual and intra-individual variability of the sampled population. These breathing rates can be used for risk assessment of subchronic and chronic inhalation exposures of narrow age groups of children. 相似文献
39.
40.