全文获取类型
收费全文 | 9117篇 |
免费 | 225篇 |
国内免费 | 1篇 |
专业分类
管理学 | 1332篇 |
民族学 | 53篇 |
人口学 | 748篇 |
丛书文集 | 28篇 |
理论方法论 | 830篇 |
综合类 | 85篇 |
社会学 | 4005篇 |
统计学 | 2262篇 |
出版年
2023年 | 54篇 |
2022年 | 29篇 |
2021年 | 59篇 |
2020年 | 137篇 |
2019年 | 221篇 |
2018年 | 229篇 |
2017年 | 332篇 |
2016年 | 236篇 |
2015年 | 169篇 |
2014年 | 254篇 |
2013年 | 1699篇 |
2012年 | 291篇 |
2011年 | 286篇 |
2010年 | 223篇 |
2009年 | 224篇 |
2008年 | 250篇 |
2007年 | 228篇 |
2006年 | 242篇 |
2005年 | 224篇 |
2004年 | 198篇 |
2003年 | 179篇 |
2002年 | 202篇 |
2001年 | 236篇 |
2000年 | 228篇 |
1999年 | 218篇 |
1998年 | 165篇 |
1997年 | 152篇 |
1996年 | 118篇 |
1995年 | 113篇 |
1994年 | 160篇 |
1993年 | 108篇 |
1992年 | 134篇 |
1991年 | 145篇 |
1990年 | 130篇 |
1989年 | 108篇 |
1988年 | 109篇 |
1987年 | 104篇 |
1986年 | 106篇 |
1985年 | 100篇 |
1984年 | 109篇 |
1983年 | 83篇 |
1982年 | 81篇 |
1981年 | 69篇 |
1980年 | 74篇 |
1979年 | 75篇 |
1978年 | 59篇 |
1977年 | 53篇 |
1976年 | 46篇 |
1975年 | 55篇 |
1974年 | 46篇 |
排序方式: 共有9343条查询结果,搜索用时 797 毫秒
161.
The social policy of the Thatcher government is characterized by an abrupt shift in the direction of the private sector. To what extent does this reflect what people want? The Institute of Economic Affairs conclude from the only suitable national opinion survey that such a move is strongly supported. Our reanalysis of their data shows that this strand in public opinion can coexist with, and need not contradict, an equal public enthusiasm for state welfare. Such results have important implications for our understanding of social policy. We conclude, therefore, with a discussion of contrasting marxist and liberal accounts which seeks to show that the evidence of ambivalence in popular attitudes about the welfare state supports particular developments in theory. 相似文献
162.
163.
Despite rapid expansion in the maternal and child health and family planning services, there have been few attempts made to study the extent of utilisation of these services and their impact. The present study reports a simple method evolved in the quantification of utilisation of maternal care services (called maternal care receptivity - MCR), the relationship of factors such as age, parity, caste of the women and the distance of the health centre on the MCR and the impact of MCR on perinatal and neonatal mortalities. An inverse relationship was observed between MCR and perinatal and neonatal mortality rates and the two rates were three times less among babies born to mothers with high MCR scores compared to those with poor MCR scores. 相似文献
164.
Wright DK 《The Public relations journal》1982,38(12):12, 14, 15-12, 14, 16
165.
Carol K. Sigelman Susan F. Elias-Burger Pamela Danker-Brown Donald L. Burger 《Journal of Nonverbal Behavior》1982,6(4):259-264
Sex differences in three communication behaviors consistently found to be more common among females than males — smiling, gazing at one's partner, and sentence complexity — were examined through analysis of interviews with 78 institutionalized mentally retarded adults. While females were significantly more likely than males to smile or laugh, and tended to use longer, more complex sentences, the commonly observed sex difference in gazing failed to generalize to a retarded sample. These findings clarify limits on the generalizability of sex differences beyond college students and other normal populations.This research was partially supported by a grant to the Texas Tech University Research and Training Center in Mental Retardation from the Rehabilitation Services Administration, Department of Health Education, and Welfare. 相似文献
166.
167.
S. K. Gaisie 《Demography》1975,12(1):21-34
This paper attempts to measure infant and child mortality levels and also to determine their structure by utilizing the results of the 1968–1969 National Demographic Sample Survey which was conducted under the directorship of the author. Among the major problems encountered in the exercise are the adjustment of the current raw mortality data and the estimation of infant and child mortality from independent source material. The estimated infant mortality rates range from 56 per 1,000 live births in the Accra Capital District to 192 in the Upper Region during the late 1960’s. The urban rate is lower than the rural rate, 98 as against 161 per 1,000 live births. A large proportion of the deaths among children aged 0–4 occur in the second year of life, and deaths in this age group account for the bulk of the deaths within the age group 1–4 years. 相似文献
168.
169.
Task partitioning in new product development teams: A knowledge and learning perspective 总被引:2,自引:0,他引:2
R&D alliances and outsourcing elements of the new product development process are now commonplace practices among many firms. However, little previous work has examined how these organizational choices influence project knowledge and learning. Based on a comparison of three new product development projects in the software industry, this paper examines how task partitioning in the project influences learning and knowledge development within the firm. The paper suggests that internal development projects encourage synthetic learning and development of architectural and tacit knowledge; in contrast, outsourcing and joint ventures encourage analytic learning and development of component and explicit knowledge. 相似文献
170.
Compliance Versus Risk in Assessing Occupational Exposures 总被引:1,自引:0,他引:1
Rogelio Tornero-Velez Elaine Symanski Hans Kromhout Rong C. Yu Stephen M. Rappaport 《Risk analysis》1997,17(3):279-292
Assessments of occupational exposures to chemicals are generally based upon the practice of compliance testing in which the probability of compliance is related to the exceedance [γ, the likelihood that any measurement would exceed an occupational exposure limit (OEL)] and the number of measurements obtained. On the other hand, workers’ chronic health risks generally depend upon cumulative lifetime exposures which are not directly related to the probability of compliance. In this paper we define the probability of “overexposure” (θ) as the likelihood that individual risk (a function of cumulative exposure) exceeds the risk inherent in the OEL (a function of the OEL and duration of exposure). We regard θ as a relevant measure of individual risk for chemicals, such as carcinogens, which produce chronic effects after long-term exposures but not necessarily for acutely-toxic substances which can produce effects relatively quickly. We apply a random-effects model to data from 179 groups of workers, exposed to a variety of chemical agents, and obtain parameter estimates for the group mean exposure and the within- and between-worker components of variance. These estimates are then combined with OELs to generate estimates of γ and θ. We show that compliance testing can significantly underestimate the health risk when sample sizes are small. That is, there can be large probabilities of compliance with typical sample sizes, despite the fact that large proportions of the working population have individual risks greater than the risk inherent in the OEL. We demonstrate further that, because the relationship between θ and γ depends upon the within- and between-worker components of variance, it cannot be assumed a priori that exceedance is a conservative surrogate for overexposure. Thus, we conclude that assessment practices which focus upon either compliance or exceedance are problematic and recommend that employers evaluate exposures relative to the probabilities of overexposure. 相似文献