全文获取类型
收费全文 | 19633篇 |
免费 | 357篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2852篇 |
民族学 | 71篇 |
人才学 | 1篇 |
人口学 | 1888篇 |
丛书文集 | 77篇 |
教育普及 | 2篇 |
理论方法论 | 1765篇 |
现状及发展 | 1篇 |
综合类 | 277篇 |
社会学 | 9441篇 |
统计学 | 3616篇 |
出版年
2021年 | 119篇 |
2020年 | 280篇 |
2019年 | 383篇 |
2018年 | 451篇 |
2017年 | 614篇 |
2016年 | 478篇 |
2015年 | 364篇 |
2014年 | 465篇 |
2013年 | 3044篇 |
2012年 | 645篇 |
2011年 | 624篇 |
2010年 | 460篇 |
2009年 | 389篇 |
2008年 | 462篇 |
2007年 | 476篇 |
2006年 | 465篇 |
2005年 | 452篇 |
2004年 | 418篇 |
2003年 | 383篇 |
2002年 | 424篇 |
2001年 | 526篇 |
2000年 | 545篇 |
1999年 | 466篇 |
1998年 | 346篇 |
1997年 | 313篇 |
1996年 | 325篇 |
1995年 | 307篇 |
1994年 | 287篇 |
1993年 | 291篇 |
1992年 | 344篇 |
1991年 | 319篇 |
1990年 | 289篇 |
1989年 | 293篇 |
1988年 | 291篇 |
1987年 | 252篇 |
1986年 | 243篇 |
1985年 | 278篇 |
1984年 | 269篇 |
1983年 | 251篇 |
1982年 | 215篇 |
1981年 | 182篇 |
1980年 | 165篇 |
1979年 | 195篇 |
1978年 | 179篇 |
1977年 | 161篇 |
1976年 | 136篇 |
1975年 | 160篇 |
1974年 | 118篇 |
1973年 | 116篇 |
1972年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 23 毫秒
121.
Pollard JH 《Mathematical Population Studies》1989,2(1):1-14
Mortality data are often gathered using 5-year age groups rather than individual years of life. Furthermore, it is common practice to use a large open-ended interval (such as 85 and over) for mortality data at the older ages. These limitations of the data pose problems for the actuary or demographer who wishes to compile a full and accurate life table using individual years of life. The author devises formulae which handle these problems. He also devises methods for handling mortality during the 1st year of life and for dealing with other technical problems which arise in the compilation of the full life table from grouped data. 相似文献
122.
Knodel J Wongsith M 《Asian and Pacific population forum / East-West Population Institute, East-West Center》1989,3(4):1-10, 25-35
"Using 1980 census and 1987 survey data on birth cohorts to examine recent primary and secondary school enrollment trends [in Thailand], this study reports that primary enrollment is nearly universal but secondary enrollment is much less prevalent. The study assesses several factors thought to influence enrollment and finds that urban residence, parents' completion of primary school, the mother's positive attitude toward education, and the family's being comfortable economically to be associated with children's enrollment in secondary school. It also indicates that, for moderately well-off families, proximity to schools has a major influence on secondary school attendance. For the wealthiest families, however, distance is not a hindrance to attendance, and for the poorest families, having a school nearby is not sufficient to ensure attendance." 相似文献
123.
Africa's expanding population: old problems,new policies 总被引:1,自引:0,他引:1
Goliber TJ 《Population bulletin》1989,44(3):5-51
Sub-Saharan Africa faces an historic challenge: to achieve economic and social progress while experiencing extraordinary population growth. With an estimated 1989 population of 512 million, the 42 countries of sub-Saharan Africa have the highest birth and death rates of any major world region. While death rates have fallen since the 1960s, persistently high birth rates yield annual growth rates above 3% in many countries. The United Nations projects that the region's population will increase 2.7 times by 2025--to 1.4 billion. Throughout the region, population has outstripped economic growth since the mid-1970s. In addition, many African countries are experiencing an epidemic of AIDS (Acquired Immunodeficiency Syndrome). The extent and demographic impact of the epidemic still are unknown, but disturbing social and political effects are already being felt. The region's population growth will slow only when African couples begin to have fewer children. The average number of children per woman ranges from 6 to 8 for most countries. The Africans' preference for large families is deeply rooted in the culture and fed by the perceived economic benefits they receive from their children. Economic stagnation during the 1980s prompted many national governments to recognize that rapid population growth was hindering their socioeconomic development. The political climate has shifted away from pronatalist or laissez-faire attitudes toward official policies to slow population growth. The policy formation process--detailed here for 4 countries (Zambia, Nigeria, Zaire, and Liberia)--is ponderous and beset with political and bureaucratic pitfalls, However, policy shifts in more and more countries combined with evidence of increased contraceptive use and fertility downturns in a few countries give some hope that the region's extraordinary population growth may have peaked and will start a descent. Whatever the case, the decade of the 1990s will be crucial for the future of sub-Saharan Africa. 相似文献
124.
The authors develop an econometric model to examine the impact of migration on fertility in Greece in the period 1968-1986. In the model, the fertility equation is considered within a simultaneous equation system, and international migration is included as an explanatory factor of both fertility and per capita income. (SUMMARY IN FRE AND SPA) 相似文献
125.
126.
To assess the validity and clinical utility of the marital inventory ENRICH, a discriminant validity study was conducted using a national sample of 5039 married couples. The sample was randomly split in order to form a cross-validation group. ENRICH is a multidimensional scale and two types of analysis were conducted to assess the value of these various scales. Results from discriminant analysis indicated that using either the individual scores or couples' scores, happily married couples could be discriminated from unhappily married couples with 85–95% accuracy. These results were cross-validated with a second sample. Using regression analysis, it was clearly demonstrated that background factors account for little of the variance in discriminating happy from unhappily married couples compared to their relationship dynamics, i.e., scale scores. All ENRICH scales except equalitarian roles proved significant, indicating the validity of a multidimensional inventory. 相似文献
127.
128.
Haley J 《Journal of marital and family therapy》1989,15(2):127-132
According to long-term follow-up studies of people diagnosed schizophrenic, one half to two thirds will become normal and be back in the community after a period of years. With evidence that schizophrenia is reversible, professions involved in social control and those doing therapy face new responsibilities. Therapists can approach psychotic symptoms expecting the person to become normal. The goal is to help people past periods of acute disturbance without doing them long-term harm. 相似文献
129.
Compliments are often viewed primarily as a linear event in which one person expresses approval or admiration of another. Far less attention has been given to the circular nature of compliments and the manner in which they enhance the positions of both the giver and the receiver of the compliment. Therapeutic compliments have proven to be highly effective means of motivating clients, while at the same time increasing therapeutic leverage. This article proposes that compliments should be purposefully given, and that the type of compliment should vary with the stage of therapy and the intended response of the client to the compliment. 相似文献
130.
Breunlin DC Schwartz RC Krause MS Kochalka J Puetz RA Dyke J 《Journal of marital and family therapy》1989,15(4):387-395
Research on family therapy training has produced very little data regarding the kinds of trainees that do best in family therapy training programs. This study attempts to provide some rough and preliminary data on that issue. One hundred and seventy trainees, drawn from seven different structural!strategic training experiences, were evaluated as to how much they learned by taking the Family Therapy Assessment Exercise pre- and posttraining. Their performance was correlated using a hierarchical regression analysis with a number of trainee variables such as amount of conjugal family experience, amount of experience doing family or individual therapy, or prior knowledge of family therapy. The results indicate that, as predicted, conjugal family experience was positively related, and prior knowledge was negatively related to performance. Prior experience doing individual therapy was also positively related to performance. 相似文献