全文获取类型
收费全文 | 21424篇 |
免费 | 375篇 |
国内免费 | 1篇 |
专业分类
管理学 | 3117篇 |
民族学 | 90篇 |
人才学 | 2篇 |
人口学 | 2046篇 |
丛书文集 | 98篇 |
教育普及 | 2篇 |
理论方法论 | 1912篇 |
现状及发展 | 1篇 |
综合类 | 277篇 |
社会学 | 10443篇 |
统计学 | 3812篇 |
出版年
2021年 | 121篇 |
2020年 | 297篇 |
2019年 | 402篇 |
2018年 | 478篇 |
2017年 | 650篇 |
2016年 | 512篇 |
2015年 | 377篇 |
2014年 | 500篇 |
2013年 | 3398篇 |
2012年 | 676篇 |
2011年 | 682篇 |
2010年 | 500篇 |
2009年 | 422篇 |
2008年 | 497篇 |
2007年 | 534篇 |
2006年 | 504篇 |
2005年 | 494篇 |
2004年 | 454篇 |
2003年 | 430篇 |
2002年 | 464篇 |
2001年 | 560篇 |
2000年 | 564篇 |
1999年 | 495篇 |
1998年 | 378篇 |
1997年 | 354篇 |
1996年 | 359篇 |
1995年 | 341篇 |
1994年 | 317篇 |
1993年 | 331篇 |
1992年 | 380篇 |
1991年 | 352篇 |
1990年 | 320篇 |
1989年 | 315篇 |
1988年 | 309篇 |
1987年 | 283篇 |
1986年 | 268篇 |
1985年 | 303篇 |
1984年 | 295篇 |
1983年 | 283篇 |
1982年 | 244篇 |
1981年 | 206篇 |
1980年 | 189篇 |
1979年 | 219篇 |
1978年 | 205篇 |
1977年 | 172篇 |
1976年 | 156篇 |
1975年 | 173篇 |
1974年 | 138篇 |
1973年 | 125篇 |
1971年 | 100篇 |
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
451.
Much recent research on sexual minorities has used couples-based samples, which--by construction--provide no information on nonpartnered individuals. We present the first systematic empirical analysis of partnership and cohabitation among self-identified gay men and lesbians using two independent, large, population-wwbased data sources from California. These data indicate that 37%-46% of gay men and 51%-62% of lesbians aged 18-59 are in cohabiting partnerships (compared with 62% of heterosexual individuals in coresidential unions at comparable ages). Unlike previous research, we find that white and highly educated gay men and lesbians are more likely to be partnered, and we confirm that same-sex cohabiting partners in our data have demographic characteristics that are similar to California same-sex couples from Census 2000. We also present the first detailed analysis of officially registered domestic partnerships in California. We find that almost half of partnered lesbians are officially registered with the local or state government, while less than a quarter of partnered gay men are officially registered. We conclude with implications of our findings for couples-based research on gay men and lesbians, as well as recommendations for survey data collection. 相似文献
452.
Selective migration and health in the USA, 1984-93 总被引:1,自引:0,他引:1
Using data from the Panel Study of Income Dynamics, we investigated the impact of health on domestic migration within the USA. We find that, for men below 60 years of age, a move from the middle to the bottom of the health distribution reduces mobility by 32-40 per cent. Non-random attrition from the panel implies that these are lower bounds. By contrast, we find evidence that, among older men, there is higher mobility at the top and bottom of the health distribution than there is in the middle. For women, we find no evidence of a relationship between their own health and mobility, although spouse's health does affect the mobility of married women. 相似文献
453.
R. D. Blanchard-Boehm R. A. Earl J. H. Wachter E. J. Hanford 《Population and environment》2008,29(6):292-312
San Antonio, Texas, the seventh largest city in the United States, has experienced steady population growth, since the “boom”
of the 1960s. Projected water shortages due to this growth were realized as early as the 1970s by city leaders and south-central
Texas regional development decision makers. To reduce dependence on the already over-taxed, Edwards aquifer, a solution, the
Applewhite Dam and Reservoir Project, was developed with wide acceptance by federal, state, and city leaders who regarded
the project as a necessary measure for regional growth and development. However, opposition by taxpayer and environmental
groups led to referendums of 1991 and 1994 in which voters blocked construction of the dam and reservoir leaving the city
with limited options for water provision. This case study investigated the factors which led to a clear mismatch in communication
between decision makers—those who were aware of the actual and quantifiable risk to the region in terms of reduced water supplies—and
the general public, a population that did not have complete and/or adequate knowledge of their actual risk regarding future
water shortages, nor, of solutions being developed, such as the Applewhite project. The findings from this case study indicate
that when municipal leadership fails to adequately communicate risk regarding resource shortage to an affected public, as
well as, openly planned solutions, that voters are likely to underestimate future impacts of water shortages, heed last-minute
opposition, and reject long-standing, publicly proposed projects. The intent of this research is not to support either side
in the Applewhite controversy, but to shed perspective on the process of adequately and effectively communicating future water
needs to an at-risk population. Decision makers in cities across the United States who are faced with solving problems of
limited resources needed by a large populace may be informed by the results of this research. 相似文献
454.
This supplemental issue of the Journal of Homosexuality presents research that explores a variety of health care issues encountered by lesbian, gay, bisexual, transgender and intersex (LGBTI) population groups in the United States over the 10-year period from 1993 to 2002. Topics include access to health care, utilization of care, training of medical and mental health providers, and the appropriate preparation of clinical offices and waiting areas. Authors used a variety of community-based public health research methods, including participant and provider surveys and retrospective chart reviews of patients, to develop this body of research, providing a recent-historical perspective on the complex health care and health-related needs of sexual and gender minorities. Particularly for transgender and intersex populations, the state of research describing their health care needs is in its infancy, and much remains to be done to design effective medical and mental health programs and interventions. 相似文献
455.
As an exploration of the potential impact of fears of discrimination against GLBTs in long-term health care settings, this study compared perceptions of GLBT persons and heterosexuals. A total of 132 GLBT persons and 187 heterosexuals living in Eastern Washington completed a survey that contained demographic questions and perceptions of discrimination in long-term care settings. Most respondents suspected that staff and residents of care facilities discriminate against GLBTs. GLBT respondents who believed that residents of care facilities are victims of discrimination were more likely to believe that they would have to hide their sexual orientation if admitted to a care facility. GLBT respondents were more likely than heterosexual respondents to believe that GLBTs do not have equal access to health care and social services, that GLBTs residents of care facilities are victims of discrimination, that GLBT sensitivity training programs would benefit staff and residents of care facilities, and that GLBT retirement facilities would be a positive development for older GLBTs. This study is offered as a preliminary investigation of concerns about GLBT discrimination in health care settings, how concerns are expressed, and the implications of those concerns for health care needs. 相似文献
456.
David J. McKenzie 《Population and development review》2008,34(1):115-135
Individual‐level census and household survey data are used to present a rich profile of young developing country international migrants around the world. They are found to comprise a large share of the flow of migrants, particularly among migrants to other developing countries, with the age distribution of migrants peaking in the late teens or early twenties. Detailed data are presented on the age and sex composition of migrants, on whether young migrants move alone or with a parent or spouse, on their participation in schooling and work in the destination country, on the types of jobs they have, and on the incidence and age of return migration. The results suggest a high degree of commonality in the youth immigrant experience across a number of destination countries. Recent developing country young migrants tend to work in similar occupations and are more concentrated in these occupations than recent older migrants or young immigrants who arrived at an earlier age. Nevertheless, there is also considerable heterogeneity among young immigrants with respect to school attendance and work in their destination country. The potential of international migration for building human capital is significant but far from being fully used. 相似文献
457.
J. C. S. Vasconcelos E. M. M. Ortega J. S. Vasconcelos G. M. Cordeiro A. L. Vivan M. A. M. Biaggioni 《Journal of applied statistics》2022,49(8):2035
A heteroscedastic regression based on the odd log-logistic Marshall–Olkin normal (OLLMON) distribution is defined by extending previous models. Some structural properties of this distribution are presented. The estimation of the parameters is addressed by maximum likelihood. For different parameter settings, sample sizes and some scenarios, various simulations investigate the performance of the heteroscedastic OLLMON regression. We use residual analysis to detect influential observations and to check the model assumptions. The new regression explains the mass loss of different wood species in civil construction in Brazil. 相似文献
458.
459.
This field study provides variables that can be used by practitioners as action levers and by future researchers as the basis for theoretical development. Conclusions from relevant literature and findings from interviews with interdisciplinary research management identified forty variables that were viewed as important to interdisciplinary research project success. After adjusting the data for reliability attenuation, these variables were further analyzed to identify the best prediction equation. The findings suggested that project age or the longevity of the project and open discussion of disagreements were the best predictors of performance. 相似文献
460.
The purpose of the current study was to determine whether brand name can affect the public's evaluation of a product. All subjects smoked identical cigarettes. One group of subjects, however, knew the cigarettes by the name of “Frontiersman,” a masculine name, while the other group knew the cigarettes as “April,” a feminine name. Male and female subjects were asked to rate the cigarette on seven measures. Results show that women gave a more positive evaluation to the cigarette purportedly named “April,” while men gave a more positive evaluation to the identical cigarette when they thought it was named “Frontiersman.” In addition, women reacted more strongly than did men to brand name influence. 相似文献