全文获取类型
收费全文 | 7022篇 |
免费 | 51篇 |
国内免费 | 1篇 |
专业分类
管理学 | 312篇 |
民族学 | 140篇 |
人才学 | 16篇 |
人口学 | 384篇 |
丛书文集 | 259篇 |
教育普及 | 1篇 |
理论方法论 | 3254篇 |
现状及发展 | 1篇 |
综合类 | 848篇 |
社会学 | 1665篇 |
统计学 | 194篇 |
出版年
2022年 | 7篇 |
2021年 | 7篇 |
2020年 | 10篇 |
2019年 | 25篇 |
2018年 | 16篇 |
2017年 | 23篇 |
2016年 | 16篇 |
2015年 | 25篇 |
2014年 | 85篇 |
2013年 | 33篇 |
2012年 | 464篇 |
2011年 | 298篇 |
2010年 | 139篇 |
2009年 | 90篇 |
2008年 | 197篇 |
2007年 | 251篇 |
2006年 | 267篇 |
2005年 | 279篇 |
2004年 | 246篇 |
2003年 | 168篇 |
2002年 | 168篇 |
2001年 | 175篇 |
2000年 | 144篇 |
1999年 | 85篇 |
1998年 | 73篇 |
1997年 | 50篇 |
1996年 | 54篇 |
1995年 | 66篇 |
1994年 | 46篇 |
1993年 | 200篇 |
1992年 | 230篇 |
1991年 | 292篇 |
1990年 | 117篇 |
1989年 | 217篇 |
1988年 | 208篇 |
1987年 | 221篇 |
1986年 | 241篇 |
1985年 | 262篇 |
1984年 | 265篇 |
1983年 | 265篇 |
1982年 | 314篇 |
1981年 | 343篇 |
1980年 | 229篇 |
1979年 | 55篇 |
1978年 | 25篇 |
1977年 | 7篇 |
1974年 | 8篇 |
1966年 | 8篇 |
1959年 | 8篇 |
1957年 | 6篇 |
排序方式: 共有7074条查询结果,搜索用时 0 毫秒
111.
112.
Ghana. Ministry of Health 《National population news bulletin : newsletter of the National Population Council》1996,1(3):5, 8
USAID has assisted the Ghanian Ministry of Health since 1991 to boost family planning services under the Ghana Family Planning and Health Project by providing supplies and information and increasing the effectiveness of HIV/AIDS prevention and control. The sustainability of the health system is endangered by favoring capital expenditures in lieu of continuous expenditures; the lack of linkage between project activities and regular activities; the centralization of resource flow; and too ambitious targeting. Capital outlays provided by USAID featured in the construction of four public health laboratories, but their operation also requires continuous financing amounting to about 10% of the whole investment. The latter is the responsibility of the government, although the details of these recurrent costs were not detailed at the outset and providing these funds for continuous operation may impair the operation of other systems. The resource constraints could be alleviated by an effective cost-recovery system or by the general improvement of the economy. The lack of linkage between project and regular activities is serious at regional and district levels. The centralization of resource flow means that most resources are kept for headquarter level activities, thus other activities suffer and the health sector becomes excessively reliant on donor support. Too ambitious planning stems from pressure on donors and hastily implemented projects result in duplication and waste. Closer consultation with the parties involved would improve the situation. The rivalry of technical and policy groups has contributed to past deficiencies. Double funding for the same activity has also occurred further increasing the dependence on donor funding. By concentration on people and systems sustainability would be enhanced, while cost recovery would help the operation of the laboratories. The Health Education Unit (HEU) recognized the importance of IEC and obtained financing for such activities. 相似文献
113.
A striking characteristic of recent Western labour market trends is the rise in employment among mothers of very young children. So far, few studies have analysed the impact of public policies on employment rates of young mothers. In this study we address this issue by comparing two similar countries, Norway and Sweden, which have the same set of policies with slight variations, using data sets with similar designs. We analyse rates of re-entry into paid work after first birth for mothers in 1968–88 by means of hazard regression. One important finding is that the right to paid maternity leave with jobsecurity greatly speeds up the return to work.We want to thank Jan Kowalski for programming assistence and the Swedish Research Council for the Social Sciences and the Swedish Council for Research in the Humanities and Social Sciences for financial support for the Swedish study. We are grateful to John F. Ermisch, Siv Gustafsson, to two anonymous referees and to colleagues at the Demography Unit for valuable comments. Responsible editors. Siv S. Gustafsson, John F. Ermisch. 相似文献
114.
Experiments involving large social units, such as schools, work sites, or whole cities, are commonly limited in statistical power because the number of randomized units is small, leaving few degrees of freedom for residual (between-unit) error. The authors describe a method for increasing residual degrees of freedom in a community experiment without substantially increasing cost or difficulty. In brief, they propose that the experimental units should be divided into random subsamples (batches). Batch sampling can improve statistical power if the community endpoint means are stable over time or if their temporal variation is comparable in period to the batch-sampling schedule. The authors demonstrate the theoretical advantages of the batch system and illustrate its use with data from the Pawtucket Heart Health Program, in which such a design was implemented. 相似文献
115.
The mandate for health care organizations to be accountable for quality, as well as price, is now unavoidable. The Joint Commission's ORYX project is requiring every hospital to measure clinical outcomes of a majority of its patients within the next three years. This mandate can be met best with systems of clinical outcomes measurement that provide valid, reliable risk adjustment; yield meaningful information about many different diseases and procedures; and measure more than mortality or cost--all using primarily billing data. New outcomes measurement tools with all of these capabilities are available and have already enabled quality improvement in dozens of hospitals across the U.S. 相似文献
116.
Ruffin M 《Physician executive》1997,23(5):62-64
Why is medical informatics important to health care leaders? As an emerging science, informatics focuses on applying computing and communication technology to decision making for clinicians and managers. It enhances the understanding of how information and communication systems can impact the work health care managers must accomplish. As the cost of technology for digital information management continues to decline, organizations and individuals will look for ways to offset the human costs of managing and conveying information. The way of the paper medical record is being replaced by the less expensive and more efficient digital information systems. Leaders of health care organizations need to look for every opportunity to deploy networks and computers to reduce the labor costs of data collection, storage, retrieval, and analysis. 相似文献
117.
Ruffin M 《Physician executive》1997,23(4):40-46
Listed here are some medical management and health care related Web sites on the Internet worth visiting, as well as favorite search engines and how to use them. From health care systems and hospitals, to health plans and insurers, the industry is using Web technology to promote programs and outcomes, and to provide information on health and wellness. 相似文献
118.
Mahidol University. Institute for Population Social Research IPSR 《Mahidol population gazette / Institute for Population and Social Research, Mahidol University》1997,6(1):1-2
In thousands, Thailand's total population as of July 1, 1997, was 60,440, of which 30,202 were male and 30,238 were female. 19,087 live in urban areas and 41,353 live in rural areas. 12,141 live in the northern region, 19,678 to the northeast, 7566 in the South, 13,112 centrally, and 7943 in the Bangkok metropolis. 16,288 were under age 15, 39,073 aged 15-59, and 5079 aged 60 and over. There were 15,558 women of reproductive ages 15-44. Crude birth and death rates per 1000 population were 15.6 and 5.0, respectively, with an overall natural growth rate of 1.1%. Infant mortality was 25.0 per 1000 live births. Male and female life expectancies at birth were 66.6 and 71.7 years, respectively. Further life expectancies at age 60 for males and females were 18.8 and 22.0 years, respectively. The rate of total fertility per woman was 1.98 with a contraceptive prevalence rate of 72.2% and an anticipated population of 70,642 in the year 2012. 相似文献
119.
120.
Sussman S Galaif ER Newman T Hennesy M Pentz MA Dent CW Stacy AW Moss MA Craig S Simon TR 《Evaluation review》1997,21(1):94-123
Little documentation exists regarding the functioning of formalized adolescent groups as drug abuse prevention agents. Two studies are described that were conducted at high schools whose students are at high risk for drug abuse. Twenty-one schools were randomly assigned to one of three conditions: (a) standard care, (b) classroom drug abuse education only, or (c) classroom plus school-as-community. Results of the first study indicated that the school-as-community component--which involved weekly meetings and periodic events at seven schools--was implemented as planned, drug abused focused, and perceived as productive in discouraging drug abuse. In the second study, staff in the classroom plus school-as-community condition self-reported involvement in the greatest number of community activities across the school year, compared with staff from the other two conditions. These two studies support the feasibility of formalized groups of high-risk youth to promote drug-free events. 相似文献