全文获取类型
收费全文 | 90375篇 |
免费 | 1963篇 |
国内免费 | 3篇 |
专业分类
管理学 | 12315篇 |
民族学 | 533篇 |
人才学 | 25篇 |
人口学 | 6886篇 |
丛书文集 | 520篇 |
教育普及 | 1篇 |
理论方法论 | 9350篇 |
现状及发展 | 1篇 |
综合类 | 2097篇 |
社会学 | 41866篇 |
统计学 | 18747篇 |
出版年
2023年 | 508篇 |
2021年 | 563篇 |
2020年 | 1502篇 |
2019年 | 2196篇 |
2018年 | 2054篇 |
2017年 | 3127篇 |
2016年 | 2361篇 |
2015年 | 2044篇 |
2014年 | 2617篇 |
2013年 | 18804篇 |
2012年 | 2335篇 |
2011年 | 2122篇 |
2010年 | 1934篇 |
2009年 | 2160篇 |
2008年 | 2000篇 |
2007年 | 1820篇 |
2006年 | 2049篇 |
2005年 | 2256篇 |
2004年 | 2124篇 |
2003年 | 1875篇 |
2002年 | 1965篇 |
2001年 | 1980篇 |
2000年 | 1779篇 |
1999年 | 1680篇 |
1998年 | 1496篇 |
1997年 | 1336篇 |
1996年 | 1297篇 |
1995年 | 1317篇 |
1994年 | 1277篇 |
1993年 | 1267篇 |
1992年 | 1257篇 |
1991年 | 1190篇 |
1990年 | 1168篇 |
1989年 | 1028篇 |
1988年 | 1103篇 |
1987年 | 980篇 |
1986年 | 882篇 |
1985年 | 1064篇 |
1984年 | 1122篇 |
1983年 | 1011篇 |
1982年 | 928篇 |
1981年 | 855篇 |
1980年 | 805篇 |
1979年 | 870篇 |
1978年 | 763篇 |
1977年 | 684篇 |
1976年 | 653篇 |
1975年 | 623篇 |
1974年 | 515篇 |
1973年 | 438篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Consumer Confidence Indexes can be sensibly used in economic and social research conducted in theoretical and methodological framework of social indicators research. They are good predictors of other attitudes, such as voting preferences. Voting preferences are determined much more strongly by expectations of changes in economic conditions than by evaluations of present situation. On the other hand, Consumer Sentiment Indexes — irrespective whether they concern future or present times — are correlated more strongly with leading than with coincident indexes of economic cycles. That proves very important role of predictions, expectations and hopes in attitude formation. 相似文献
992.
The dramatic increase in U.S. cesarean sections over the past two decades has been significantly driven by repeat C-sections. In response to this trend, clinical guidelines recommending vaginal birth after cesarean-section (VBAC) have been promulgated by national organizations. Adherence to these guidelines would reduce the number of repeat C-sections, lower the overall C-section rate, and improve both the quality and the cost of health care. While these guidelines have received professional endorsement, their implementation has been clouded by issues of patient acceptance and provider payment. To examine implementation of these guidelines by health care organizations, the authors surveyed 156 members of the American College of Physician Executives to determine their policies, practices, and attitudes toward VBAC guidelines. Those surveyed generally were medical directors in HMOs, hospitals, and other practice settings. The findings indicate that the health care organizations represented by these physician executives have not consistently implemented VBAC guideline and that they are reluctant to hold physicians, their patients, or hospitals accountable for the financial, utilization, and quality impact of the elective decision ot to pursue appropriate VBACs. We conclude that, even when widely accepted, clinical practice guidelines may be ineffective in reducing the costs or improving the quality of medical care. 相似文献
993.
Cummings KC 《Physician executive》1995,21(10):14-17
The need for physicians in management roles in the health care system has never been greater. And the years ahead will see that need broadened and intensified. To maintain their leadership role in medical affairs in hospitals and other types of health care delivery organizations, physician executives will have to envision provider organizations and systems that have not yet been conceived, let alone developed and implemented. They have to become totally open-minded and futuristic in their thinking. And they will have to help other physicians accommodate this new way of thinking if the medical profession is to continue in a leading role in health care matters. Although numerous factors will have to be anticipated and analyzed by these new physician leaders, the ascendancy of primary care in a managed health care world long dominated by the technical and technological superiority of hospital care will present a particular challenge to the physician executive. 相似文献
994.
Measuring credibility of compensatory preference statements when trade-offs are interval determined 总被引:1,自引:0,他引:1
This paper studies how an overall fuzzy preference relation can be constructed in the compensatory context of the simple additive difference model, when imprecision on the trade-offs has to be taken into account. Three credibility indices of preferences are analysed and illustrated by a numerical example. Arguments are presented supporting the use of the third index, for which an interesting transitivity property (which was an open problem) is proved. 相似文献
995.
Okojie CE 《Journal of social development in Africa》1995,10(1):25-35
Nikrowa is a riverine village located in Ovia North-East Local Government Area of Edo State. This paper examines the relationship between the environment and the health status of women and children in the village. Data used in this essay were obtained mainly in focus groups from a study of women and health service utilization in Nikrowa. Women in Nikrowa farm, fish, collect water and firewood, and process and prepare food. They also bear many children. Their hard physical labor causes them to suffer continuous body aches and pains. Environment-related illnesses such as malaria, measles, dysentery, and diarrhea are prevalent among children. The geographical isolation of Nikrowa limits access to modern health care facilities, so traditional therapies are used to treat prevailing illnesses. It is suggested that women have access to fertilizers in order to improve soil fertility and agricultural yields. Fuelwood and adequate and safe water supplies should be made readily available to women. Moreover, access roads to rural areas should be improved to facilitate transport to modern health care facilities, and rural primary health care facilities should be helped to provide efficient services by providing trained staff and ensuring regular supplies of drugs. 相似文献
996.
Lincoln H. Day 《Revue europeenne de demographie》1995,11(3):275-288
By the mid-1980s, fertility in most of the world's developed countries had declined to unprecedentedly low levels. Since then, it has declined still further in some, increased slightly in others, and fluctuated in still others. Irrespective of cause, these changes could not have occurred in the absence of substantial control over childbearing.While future increases and decreases are both possible, it is argued that, contrary to the usual demographic expectations for populations exercising substantial control over fertility, fertility in most of these countries will increase to approximate replacement levels and then undergo only minor fluctuations around these levels thereafter. 相似文献
997.
Robert F. Nau 《Journal of Risk and Uncertainty》1995,10(1):71-91
This article explores the extent to which a decision maker's probabilities can be measured separately from his/her utilities by observing his/her acceptance of small monetary gambles. Only a partial separation is achieved: the acceptable gambles are partitioned into a set of belief gambles, which reveals probabilities distorted by marginal utilities for money, and a set of preference gambles, which reveals utilities reciprocally distorted by marginal utilities for money. However, the information in these gambles still enables us to solve the decision maker's problem: his/her utility-maximizing decision is the one that avoids arbitrage (i.e., incoherence or Dutch books). 相似文献
998.
Drawing households and other living spaces in the process of assessment and psychotherapy 总被引:1,自引:1,他引:0
This paper introduces a drawing technique developed by the author for use in the assessment and treatment of individuals and families. The client is invited to draw a floor plan of his or her home or apartment, or an aerial view of un outdoor area. The drawing is then discussed and considered as a means of understanding critical elements of the experience of life space. The material derived is discussed from the eerspectives of family systems, psychodynamic, and abuse treatment theories, with special reference to notions of family structure, boundary, the self, and memory. Emphasis is placed on the actual physical layout of the home, as well as the subjective experience of it. Applications of the drawing technique for exploring memories are illustrated. Case examples are presented from clinical trials with children and adults in residential treatment, inpatient, and outpatient settings.The Heller Financial Corporation generously supports the development of household and spatial drawings for treatment and prevention. A version of this paper was presented at the 43rd Annual Meeting of the American Association of Psychiatric Services for Children, New Orleans, February 26, 1992. The author wishes to thank Robert B. Bloom, Ph.D., Excutive Director of JCB, for supporting the development of ideas and techniques discribed in this paper. 相似文献
999.
Suppose that social welfare function f satisfies the Pareto condition and has complete and transitive values. On a domain satisfying the free quadruple property, if the outcome set X has m< outcomes, then the set of pairs of distinct alternatives on which f satisfies both independence and nondictatorship contains at most the fraction 2/m of all pairs. On a domain satisfying the free six-tuple property, if X is a subset of Euclidean space then the set of pairs on which f satisfies both independence and nondictatorship has Lebesgue measure zero.Campbell's research was financed by the National Science Foundation, grant SES 9209039. 相似文献
1000.
"This article examines the probable effects of the North American Free Trade Agreement (NAFTA) on migration from Mexico to the United States, disputing the view that expansion of jobs in Mexico could rapidly reduce undocumented migration. To the extent that NAFTA causes Mexican export agriculture to expand, migration to the United States will increase rather than decrease in the short run. Data collected in both California and the Mexican State of Baja California show that indigenous migrants from southern Mexico typically first undertake internal migration, which lowers the costs and risks of U.S. migration. Two features of employment in export agriculture were found to be specially significant in lowering the costs of U.S. migration: first, working in export agriculture exposes migrants to more diverse social networks and information about U.S. migration; second, agro-export employment in northern Mexico provides stable employment, albeit low-wage employment, for some members of the family close to the border (especially women and children) while allowing other members of the family to assume the risks of U.S. migration." 相似文献