首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
  示例: 沙坡头地区,人工植被区,变化  检索词用空格隔开表示必须包含全部检索词,用“,”隔开表示只需满足任一检索词即可!
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   5753篇
  免费   22篇
管理学   773篇
民族学   25篇
人口学   569篇
丛书文集   26篇
教育普及   1篇
理论方法论   532篇
综合类   64篇
社会学   2648篇
统计学   1137篇
  2024年   34篇
  2023年   49篇
  2021年   60篇
  2020年   113篇
  2019年   141篇
  2018年   147篇
  2017年   213篇
  2016年   154篇
  2015年   94篇
  2014年   150篇
  2013年   863篇
  2012年   177篇
  2011年   167篇
  2010年   139篇
  2009年   129篇
  2008年   150篇
  2007年   140篇
  2006年   160篇
  2005年   124篇
  2004年   117篇
  2003年   80篇
  2002年   105篇
  2001年   140篇
  2000年   131篇
  1999年   143篇
  1998年   109篇
  1997年   91篇
  1996年   101篇
  1995年   75篇
  1994年   70篇
  1993年   91篇
  1992年   94篇
  1991年   102篇
  1990年   80篇
  1989年   78篇
  1988年   65篇
  1987年   70篇
  1986年   63篇
  1985年   79篇
  1984年   69篇
  1983年   69篇
  1982年   49篇
  1981年   43篇
  1980年   38篇
  1979年   49篇
  1978年   40篇
  1977年   33篇
  1976年   35篇
  1975年   33篇
  1974年   40篇
排序方式: 共有5775条查询结果,搜索用时 0 毫秒
161.
A multilevel model is offered proposing that organizational learning is an interdependent system where effective leaders enact intervention strategies at the individual (micro), network (meso), and systems (macro) levels. We suggest that leaders approach organizational learning by setting the conditions and structure for learning to occur, while limiting direct interference in the actual creative processes. First, leaders may increase the level of developmental readiness of individual followers, thereby increasing their motivation and ability to approach learning experiences and adapt their mental models. These individuals then serve as catalysts of learning within and between social networks. Second, leaders may promote the diffusion of knowledge between these knowledge catalysts within and across social networks through influencing both the structure and functioning of knowledge networks. Finally, leaders may target actions at the systems level to improve the diffusion to, and institutionalization of, knowledge to the larger organization.  相似文献   
162.
    
This study investigates gender differences in the effect of parents' deaths on sibling tension among bereaved adult children.  相似文献   
163.
Abstract It is well recognized that the informal economy—unregulated economic activities that generate real or in-kind income—features prominently in the day-to-day lives of many in the developing world. Researchers have begun to explore the informal economy in developed countries but this work has focussed primarily on urban areas to the neglect of rural areas. In this paper the nature and correlates of informal work in nonmetropolitan Pennsylvania are described through an analysis of survey data on 505 families. Results indicate that participation in informal activities is widespread, is not more typical of the poor, does not contribute greatly to family income on average but does help many poor families weather difficult economic times, is both economically and noneconomically motivated, and, net of other sociodemographic variables, is positively related to rurality of residence and formal labor supply.  相似文献   
164.
Preface     
  相似文献   
165.
An evaluation of the Diploma in Primary Health Care Education (DPHCE), a course offered in the University of the Witwatersrand, Johannesburg, was carried out between February and September 1991. This paper discusses the implications of the findings for the future of the program, and the development of Primary Health Care (PHC) education more generally. The following in particular are dealt with:
— an educational approach where teaching has been insufficiently linked to the daily working conditions of the students; and
— teaching a group of students consisting of individuals from both educationally advantaged and disadvantaged backgrounds.
The importance of clearly defined goals and an appropriate educational framework, consistent with the limitations that apartheid education has placed on educationally disadvantaged students, are highlighted.  相似文献   
166.
Recent patterns of fertility in Europe show marked differences between countries. Recent United Kingdom and Irish fertility curves show ‘distortions’ in terms of a ‘bulge’ in early age fertility, distinct from the smoother curves of other European countries. These patterns may not be adequately described by mathematical functions used by previous studies to model fertility curves. A mixture model with two component distributions may be more appropriate. The suitability of the simple and mixture Hadwiger functions is examined in relation to the fertility curves of a number of European countries. While the simple Hadwiger model fits recent period age-specific fertility distributions for some countries, others which display a ‘bulge’ in early age fertility require a mixture Hadwiger model. Some of the parameters of the Hadwiger models appear to be related to familiar demographic indices. The simple and mixture Hadwiger models appear useful in describing and comparing fertility patterns across European countries.  相似文献   
167.
The persistence of the population problem in many developing countries' especially in Asia, must mean that the relation between population trends and productivity has to be kept continually under review. In recent years the economists' interest in this relation has shifted away from the Keynesian stagnation analysis, with its emphasis on the influence of population trends on the level and composition of consumption and investment, to a reconsideration of their influence on production. It is a striking testimony to the influence of Malthus that his theory is still under active consideration and that it frequently serves as starting point, as it does for Professor Belshaw, for an analysis of the economics of population. Divorced from its particular context, in which value judgements particularly distasteful to many commentators abound, and reformulated in terms of modern production theory, it clarifies the main issues, by showing what facts are required and what logic demands in order to provide a useful answer to practical problems of policy. Readers of the first two chapters of Professor Buquet's book will find ample confirmation of the sterility of much of the debate regarding optimum populations which developed largely from differences of opinion about definitions of “good” and “bad” economic criteria for policy than from faults in logic. The debate continues and the posthumous career of Parson Malthus still occasions even personal abuse! It would be difficult, however, to accuse Professor Belshaw of taking sides in the Malthusian debate. He takes the Malthusian analysis for what it is worth, shows where it fits the facts and where it does not, provides convincing evidence of a Malthusian problem in Asia by a skilful round-up of well presented statistics, and then, instead of committing himself to a forecast of what is likely to happen in Asia, he illustrates through the modern theory of production what are the pre-conditions for a removal of the population problem. This is surely a sensible procedure and contrasts favourably with the sibylline utterances of a number of distinguished amateur social scientists.  相似文献   
168.
In this paper data relating to men born in 1924 in the two southernmost counties of Sweden, and called up for military service in 1944 are analyzed. The population registers yield certain demographic and social information about these men, and this may be related to their performance in an intelligence test administered when they were called up. The association between test scores and level of schooling on one hand, and such variables as nuptiality, age at marriage, number of sibs, marital fertility, the incidence of pre-nuptial conceptions and occupational class is discussed, and an estimate of the influence of differential fertility on the trend of intelligence is given.  相似文献   
169.
An analysis of the characteristics of a sample of East Indian indentured immigrants who entered British Guiana between 1865 and 1917 shows that the age, sex and caste characteristics of the immigrants are similar to those of East Indian migrants to other British colonies such as Fiji. The majority of the immigrants were Hindus belonging to the agricultural castes and on the basis of an analysis of recorded places of birth it is shown that approximately 85% of all immigrants originated in the United Provinces and Bihar.  相似文献   
170.
Demographers traditionally have paid little attention to tests of significance. This neglect presumably carried little risk so long as analyses used full-count census data or vital statistics data (typically with very large numbers) and as long as inter-group differences in demographic variables were larger than they are in many contexts to-day.2 For a variety of reasons, this attitude may no longer be justified.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号