全文获取类型
收费全文 | 92643篇 |
免费 | 1976篇 |
国内免费 | 3篇 |
专业分类
管理学 | 12527篇 |
民族学 | 555篇 |
人才学 | 26篇 |
人口学 | 7090篇 |
丛书文集 | 536篇 |
教育普及 | 2篇 |
理论方法论 | 9547篇 |
综合类 | 2133篇 |
社会学 | 43300篇 |
统计学 | 18906篇 |
出版年
2023年 | 523篇 |
2021年 | 577篇 |
2020年 | 1525篇 |
2019年 | 2250篇 |
2018年 | 2097篇 |
2017年 | 3180篇 |
2016年 | 2392篇 |
2015年 | 2075篇 |
2014年 | 2650篇 |
2013年 | 19005篇 |
2012年 | 2395篇 |
2011年 | 2190篇 |
2010年 | 1978篇 |
2009年 | 2203篇 |
2008年 | 2074篇 |
2007年 | 1912篇 |
2006年 | 2090篇 |
2005年 | 2347篇 |
2004年 | 2238篇 |
2003年 | 1911篇 |
2002年 | 2031篇 |
2001年 | 2047篇 |
2000年 | 1818篇 |
1999年 | 1726篇 |
1998年 | 1512篇 |
1997年 | 1364篇 |
1996年 | 1333篇 |
1995年 | 1351篇 |
1994年 | 1320篇 |
1993年 | 1301篇 |
1992年 | 1303篇 |
1991年 | 1245篇 |
1990年 | 1218篇 |
1989年 | 1064篇 |
1988年 | 1144篇 |
1987年 | 1016篇 |
1986年 | 919篇 |
1985年 | 1072篇 |
1984年 | 1168篇 |
1983年 | 1044篇 |
1982年 | 963篇 |
1981年 | 872篇 |
1980年 | 824篇 |
1979年 | 897篇 |
1978年 | 799篇 |
1977年 | 715篇 |
1976年 | 663篇 |
1975年 | 641篇 |
1974年 | 531篇 |
1973年 | 460篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
281.
282.
We employ vector autoregressive techniques to determine the current state of the labor queue. Unemployment rate differentials
have narrowed in recent years, potentially due to a change in the queue ordering, though a tight labor market and a stable
queue would yield similar results. We find no evidence that the queue ordering has changed, which brings into question the
resiliency of gains made by minority groups. We employ the same techniques to reveal the state of the queue across geographic
regions and find that substantial differences exist across regions, implying variation in the relative labor force status
of demographic groups. 相似文献
283.
The myths of meritocracy and multiracialism ‘explain’ between them both the ‘fairness’ of the Singapore system and the subordinate role of the non-Chinese minority races. They also purport to assure the minorities that they enjoy full status as members of the nation-building project and that their cultural and religious mores are embraced and protected within its framework. Using the Malay minority as its case study, and arguing from archival, oral, official government and secondary sources, this paper argues that the Singapore systems of meritocracy and multiracialism have not been concerned primarily with intercommunal tolerance since the 1970s, but are now programmes of assimilation of the racial minorities into a Chinese-dominated society. 相似文献
284.
土木工程类复合型执业人才培养的研究与实践 总被引:1,自引:0,他引:1
根据复合型执业人才培养模式的要求,对土木工程专业理论课程教学内容进行合并、增删、优化组合;在实践教学环节方面,安排大四学生在施工现场实践近1年,由项目经理、工程监理和发包方驻地工程师进行综合指导。理论与实践紧密结合的复合型执业人才培养的改革实践获得了极好的效果。 相似文献
285.
Hunter LM 《Population research and policy review》2006,25(2):157-174
In many developing regions, women and young girls spend several hours daily in the collection of natural resources. Still the link between these household resource strategies and stakeholder perceptions of development priorities remains unexplored. This project examines this association with survey data representative of the adult population from Ghana’s Coastal Region. Although natural resource scarcity and the sustainability of resource use represent key development challenges, there are others (e.g., energy, sanitation, employment, and educational opportunities). As such, even in the face of natural resource scarcity, individuals may place greater importance on other dimensions of development, especially if household resource strategies are perceived as relatively efficient. The analytical focus here is on water and the results suggest that gender roles shape household water collection strategies, while also shaping these strategies’ perceived opportunity costs. Specifically, Ghanian adults more often see drinking water provision as their primary development need when water sources are distant and/or when male household members collect water (particularly male heads). In the end, I argue that social science inquiry benefits by contextualizing social dynamics within environmental context, particularly within cultural settings in which human subsistence is intimately tied to the state of the natural environment. 相似文献
286.
The well-known chi-squared goodness-of-fit test for a multinomial distribution is generally biased when the observations are subject to misclassification. In Pardo and Zografos (2000) the problem was considered using a double sampling scheme and ø-divergence test statistics. A new problem appears if the null hypothesis is not simple because it is necessary to give estimators for the unknown parameters. In this paper the minimum ø-divergence estimators are considered and some of their properties are established. The proposed ø-divergence test statistics are obtained by calculating ø-divergences between probability density functions and by replacing parameters by their minimum ø-divergence estimators in the derived expressions. Asymptotic distributions of the new test statistics are also obtained. The testing procedure is illustrated with an example. 相似文献
287.
Stuart G. Baker Barnett S. Kramer 《Journal of the Royal Statistical Society. Series C, Applied statistics》2005,54(5):941-954
Summary. When evaluating potential interventions for cancer prevention, it is necessary to compare benefits and harms. With new study designs, new statistical approaches may be needed to facilitate this comparison. A case in point arose in a proposed genetic substudy of a randomized trial of tamoxifen versus placebo in asymptomatic women who were at high risk for breast cancer. Although the randomized trial showed that tamoxifen substantially reduced the risk of breast cancer, the harms from tamoxifen were serious and some were life threaten-ing. In hopes of finding a subset of women with inherited risk genes who derive greater bene-fits from tamoxifen, we proposed a nested case–control study to test some trial subjects for various genes and new statistical methods to extrapolate benefits and harms to the general population. An important design question is whether or not the study should target common low penetrance genes. Our calculations show that useful results are only likely with rare high penetrance genes. 相似文献
288.
James P. Davis 《Journal of popular culture》2005,38(6):1011-1021
289.
290.
The authors review the trends in the use of computers in the delivery and support of career guidance and counseling identified at the symposium International Perspectives on Career Development. The papers presented emphasized that 20th‐century computer‐based systems continue to be used, mainly delivered via the World Wide Web. These systems are enhanced through audio, video, graphics, strategies to provide needs assessment, and support by cybercounselors or expert system design. The papers also revealed a new trend: the use of elegant Web sites to store and search immense libraries of resources needed by professionals and clients and to facilitate communication and collaboration among professionals in cyberspace. Concerns, issues, and resources related to many areas, including the readiness of clients to use computer‐based systems, were also raised; existing sources of guidelines are noted. 相似文献