全文获取类型
收费全文 | 92225篇 |
免费 | 1965篇 |
国内免费 | 3篇 |
专业分类
管理学 | 12373篇 |
民族学 | 557篇 |
人才学 | 25篇 |
人口学 | 7157篇 |
丛书文集 | 527篇 |
教育普及 | 2篇 |
理论方法论 | 9436篇 |
现状及发展 | 1篇 |
综合类 | 2177篇 |
社会学 | 43042篇 |
统计学 | 18896篇 |
出版年
2023年 | 505篇 |
2021年 | 570篇 |
2020年 | 1507篇 |
2019年 | 2205篇 |
2018年 | 2116篇 |
2017年 | 3179篇 |
2016年 | 2382篇 |
2015年 | 2035篇 |
2014年 | 2627篇 |
2013年 | 18856篇 |
2012年 | 2475篇 |
2011年 | 2250篇 |
2010年 | 2015篇 |
2009年 | 2219篇 |
2008年 | 2122篇 |
2007年 | 1918篇 |
2006年 | 2129篇 |
2005年 | 2322篇 |
2004年 | 2204篇 |
2003年 | 1924篇 |
2002年 | 2016篇 |
2001年 | 2030篇 |
2000年 | 1806篇 |
1999年 | 1698篇 |
1998年 | 1513篇 |
1997年 | 1370篇 |
1996年 | 1317篇 |
1995年 | 1341篇 |
1994年 | 1327篇 |
1993年 | 1298篇 |
1992年 | 1306篇 |
1991年 | 1232篇 |
1990年 | 1202篇 |
1989年 | 1039篇 |
1988年 | 1127篇 |
1987年 | 1006篇 |
1986年 | 912篇 |
1985年 | 1080篇 |
1984年 | 1135篇 |
1983年 | 1018篇 |
1982年 | 944篇 |
1981年 | 864篇 |
1980年 | 827篇 |
1979年 | 871篇 |
1978年 | 779篇 |
1977年 | 713篇 |
1976年 | 657篇 |
1975年 | 638篇 |
1974年 | 517篇 |
1973年 | 441篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
321.
Jan C. H. van Eijkeren 《Risk analysis》2002,22(1):159-173
A mechanistic model is presented describing the clearance of a compound in a precision-cut liver slice that is incubated in a culture medium. The problem of estimating metabolic rate constants in PBPK models from liver slice experiments is discussed using identifiability analysis. From the identifiability problem analysis, it appears that in addition to the clearance, the compound's free fraction in the slice and the diffusion rate of the exchange of the compound between culture medium and liver slice should be identified. In addition, knowledge of the culture medium volume, the slice volume, the compound's free fraction, and octanol-water-based partition between medium and slice is presupposed. The formal solution for identification is discussed from the perspective of experimental practice. A formally necessary condition for identification is the sampling of parent compound in liver slice or culture medium. However, due to experimental limitations and errors, sampling the parent compound in the slice together with additional sampling of metabolite pooled from the medium and the slice is required for identification in practice. Moreover, it appears that identification results are unreliable when the value of the intrinsic clearance exceeds the value of the diffusion coefficient, a condition to be verified a posteriori. 相似文献
322.
Mr. Patrick J. Morrissette M.S.ED. 《Child and Adolescent Social Work Journal》1994,11(3):235-246
This paper proposes a developmental framework for foster parents and outlines four distinct growth stages. Such a framework can be of value to program administrators who are required to assess foster parent development during the crucial matching process. To draw a distinction between each developmental stage, specific instrumental tasks and indicators are outlined. 相似文献
323.
The Exclusion of Disabled People from Positions of Power in British Voluntary Organisations 总被引:1,自引:1,他引:0
Robert F. Drake 《Disability & Society》1994,9(4):461-480
Disabled people are excluded in various ways from a wide range of social privileges, activities and institutions. Voluntary and charitable organisations promote themselves as champions of disabled people in their struggle for access to the ordinary choices and opportunities of everyday life. This paper reports the findings of an empirical study which demonstrate that in voluntary agencies governed by able-bodied people, disabled people are excluded from positions of power and influence, and they experience the same sorts of barriers and constraints as those with which they are confronted in the wider world. Furthermore, the development of agencies governed by disabled people themselves is constrained by their lack of access to money, staff and other resources. 相似文献
324.
Michaela L. Z. Farber Elizabeth Timberlake Helen Patricia Mudd Linda Cullen 《Child and Adolescent Social Work Journal》2003,20(3):175-196
To prepare for the complexities of family formation, 78 prospective adoptive parents participated in Pre-Adopt, a psychosocial educational orientation program offered by one private nonprofit agency. The five-session curriculum included an overview of adoption policies and procedures, discussion of the child placement process, exploration of couples' adoption concerns and expectations about child characteristics, information about adoption laws and birth-parent/child searches, and examination of anticipatory fantasies about birth parents. Program evaluation yielded statistically significant and clinically meaningful findings about changes in emotional readiness to adopt, parenting knowledge, and satisfaction with group participation, adoption policies and agency practices. Practice implications are considered. 相似文献
325.
Jennifer S. Silk Amanda S. Morris Tomoe Kanaya Laurence Steinberg 《Journal of research on adolescence》2003,13(1):113-128
This article explores the relationship between parental psychological control and parental autonomy granting, and the relations between these constructs and indicators of adolescent psychosocial functioning, in a sample of 9,564 adolescents from grades 9 to 12. Participants completed a comprehensive parenting questionnaire as well as several measures of psychosocial adjustment. Confirmatory factor analyses of the parenting items revealed discrete factors for psychological control and autonomy granting, suggesting that these are distinct parenting constructs rather than opposite ends of a parental control continuum. Moreover, structural equation modeling showed that these factors were weakly correlated and differentially related to adolescent internalizing symptoms. Findings have implications for future conceptualization and measurement of psychological control and autonomy granting, and for research examining their effects on adolescent development. 相似文献
326.
Ian H. Langford 《Risk analysis》2002,22(1):101-120
Existential, or existential-phenomenological philosophical approaches to the social psychology of risk perception provide a novel framework for understanding issues that are common to all humanity, such as fear of death, freedom and responsibility, isolation and meaninglessness, as these anxieties are a function of existing, or being-in-the-world. These fundamental anxieties can be related theoretically to the ways people perceive risks within social and cultural milieus, and can also be used practically within case studies, as demonstrated in the three examples presented, which examine perceptions of climate change, food-related risks, and environmental awareness via a mixture of quantitative and qualitative techniques. The discussion focuses on the possible insights that can be gained from taking an existential perspective on risk perception, and relates notions of contemporary technologically-oriented societies to the existential challenges faced by individuals and societies in the contemporary world. 相似文献
327.
328.
Bertram I. Spector 《Theory and Decision》1993,34(3):183-199
The family of decision analysis techniques can be applied effectively to support practical negotiators in international settings. These techniques are most appropriate in support of the prenegotiation phase, when parties are diagnosing the situation, assessing their own plans and strategies, and evaluating likely reactions and outcomes. The paper identifies how these approaches have and can be used to assist negotiation practitioners, offers a rationale for the application of decision analytic approaches in terms of the particular analytical requirements of the prenegotiation period, suggests how these process-oriented tools can be integrated with substantive tools, and discusses ways in which these tools can be presented and delivered to practitioners in a practical and confidence-building manner. 相似文献
329.
Stolzenberg Lisa D'Alessio Stewart J. Rivers James E. Newell Augusto L. 《Social indicators research》2003,61(1):19-57
Determining the size and demographiccharacteristics of substance abuse populationsis extremely important for implementing publicpolicies aimed at the control of substanceabuse. Such information not only assists in theallocation of limited treatment resources bythe state, but also in the monitoring ofsubstance abuse trends over time and in theevaluation of innovative policy initiatives. Inthis study, we develop three composite measuresof treatment need. We then use these measuresto estimate treatment need for alcohol abuseand for controlled substance abuse within eachof Florida's 67 counties. This study providesan important empirical component of communityplanning, quantifying and, to a limited degree,specifying the level of need for the substanceabuse treatment of community residents. Anadditional benefit is the development of a costeffective and unobtrusive methodology fordetermining empirically when levels of need arechanging so that treatment levels can beadjusted accordingly. With proper use,policymakers can readily employ the methodologydeveloped in this study in Florida andelsewhere to make better-informed decisions inthe allocation of finite substance abusetreatment resources. 相似文献
330.
David A. Buchanan 《英国管理杂志》1991,2(3):121-132
This paper explores how the project management role is conditioned by the context in which change is progressed. The argument draws on Pettigrew's (1985, 1987) contextual and processual view of change, a view which does not clarify the management implications of contextual variation. Using data from a two-stage research design combining diary and survey methods, four context dimensions are identified, concerning ‘interlocking’, ‘shifting sands’, ‘ownership’ and ‘senior management view’. For analytical purposes, two extreme contexts are characterized as exposing the project manager to high and low levels of ‘vulnerability’ respectively. Project management literature typically offers a rational-linear account of change, and concentrates on ‘content’ and ‘control’ agendas, concerning technical expertise on the one hand, and planning, budgeting and monitoring techniques on the other. Sociological analyses reveal the limitations of the rational-linear account, and focus on the political and cultural dimensions of the ‘process’ agenda. The data suggest how contextual variation affects the relative priority of these agendas. The management implications of these findings are explored, for project management selection, career progression, and the development of diagnostic skills and ‘agenda management’ strategies. 相似文献