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:      
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   2110篇
  免费   101篇
管理学   436篇
民族学   13篇
人口学   122篇
丛书文集   13篇
理论方法论   237篇
综合类   22篇
社会学   1050篇
统计学   318篇
  2023年   14篇
  2021年   11篇
  2020年   38篇
  2019年   44篇
  2018年   51篇
  2017年   66篇
  2016年   57篇
  2015年   60篇
  2014年   72篇
  2013年   451篇
  2012年   69篇
  2011年   67篇
  2010年   53篇
  2009年   61篇
  2008年   65篇
  2007年   60篇
  2006年   55篇
  2005年   60篇
  2004年   58篇
  2003年   46篇
  2002年   41篇
  2001年   46篇
  2000年   42篇
  1999年   33篇
  1998年   35篇
  1997年   37篇
  1996年   28篇
  1995年   25篇
  1994年   25篇
  1993年   22篇
  1992年   26篇
  1991年   34篇
  1990年   25篇
  1989年   20篇
  1988年   19篇
  1987年   23篇
  1986年   21篇
  1985年   24篇
  1984年   17篇
  1983年   23篇
  1982年   21篇
  1981年   15篇
  1980年   16篇
  1979年   15篇
  1978年   24篇
  1977年   13篇
  1976年   13篇
  1975年   12篇
  1970年   7篇
  1969年   7篇
排序方式: 共有2211条查询结果,搜索用时 593 毫秒
121.
Many social work courses are now using ‘system theory’, or as I prefer to call it, ‘a systems' approach’, in teaching social work method on a unitary basis. Most social work techers recognise that the systems' approach is not enough on its own and that traditional methods have a place in practice. What is not clear is how these methods relate to the systems' approach.

In this article the relationship between the systems' approach and various methods and theories of intervention is explored in a number of different ways. Firstly, there is an examination of the relationship of various client, target and action systems. Secondly. Lippitt's analysis of the ‘diagnostic orientations’ of change agents is discussed and related to strategies aimed at changing the goals and the power structures of target systems. Then certain counselling and casework methods are considered in relation to Lippitt's analysis, leading on to a brief comment on methods of intervention based on systems' theory. Finally, an educational strategy for presenting this approach is discussed.  相似文献   
122.
Objective. This article uses Cox proportional hazards models to explain departures from the U.S. Courts of Appeals from 1954–2004. I argue that reforms to pension eligibility and financial incentives in 1984 extended opportunities for voluntary departures and strategic behavior, and that reasons for quitting (whether political, personal, or institutional) differed among types of departures and over time. Methods. The data represent all judge‐years from 1954–2004. Both the full period and 1954–1983 and 1984–2004 subperiods are examined. Results. The effects of political factors are limited to partial retirements and suggest judges' recognition of contentious confirmation politics since the 1980s. Personal and institutional variables dominate outright departures. Conclusions. Explanations for departures from the circuit bench differ both by type and over time. Scholars and policymakers should refine arguments regarding judicial turnover and its causes.  相似文献   
123.
The data set of 2,182 gay/bisexual men's month‐long sexual diaries collected by the United Kingdom Socio‐sexual Investigations of Gay Men and Aids (Project SIGMA) was used to analyse the extent to which acts of anal intercourse (AI) are distributed among gay men, using the Lorenz/Gini methodology for measuring concentration. Most individuals (60%) who engage in AI do so only once or twice a month, but there is a long tail of those who do it much more. In terms of the amount of AI acts, one tenth of the individuals are performing half of the acts of AI. The Gini coefficient of concentration is high (0.55). Factors most affecting rates and concentration of risk behaviour include relationship status, HIV sero‐status and concordant/discordant partner status.  相似文献   
124.
The initial version (v1) of the Fish Invasiveness Scoring Kit (FISK) was adapted from the Weed Risk Assessment of Pheloung, Williams, and Halloy to assess the potential invasiveness of nonnative freshwater fishes in the United Kingdom. Published applications of FISK v1 have been primarily in temperate‐zone countries (Belgium, Belarus, and Japan), so the specificity of this screening tool to that climatic zone was not noted until attempts were made to apply it in peninsular Florida. To remedy this shortcoming, the questions and guidance notes of FISK v1 were reviewed and revised to improve clarity and extend its applicability to broader climatic regions, resulting in changes to 36 of the 49 questions. In addition, upgrades were made to the software architecture of FISK to improve overall computational speed as well as graphical user interface flexibility and friendliness. We demonstrate the process of screening a fish species using FISK v2 in a realistic management scenario by assessing the Barcoo grunter Scortum barcoo (Terapontidae), a species whose management concerns are related to its potential use for aquaponics in Florida. The FISK v2 screening of Barcoo grunter placed the species into the lower range of medium risk (score = 5), suggesting it is a permissible species for use in Florida under current nonnative species regulations. Screening of the Barcoo grunter illustrates the usefulness of FISK v2 as a proactive tool serving to inform risk management decisions, but the low level of confidence associated with the assessment highlighted a dearth of critical information on this species.  相似文献   
125.
Summary.  Square contingency tables with matching ordinal rows and columns arise in particular as empirical transition matrices and the paper considers these in the context of social class and income mobility tables. Such tables relate the socio-economic position of parents to the socio-economic position of their child in adulthood. The level of association between parental and child socio-economic position is taken as a measure of mobility. Several approaches to analysis are described and illustrated by UK data in which interest focuses on comparisons of social class and income mobility tables that are derived from the same individuals. Account is taken of the use of the same individuals in the two tables. Additionally comparisons over time are considered.  相似文献   
126.

Most research relating objective indicators of the quality of environment to subjective indicators of the quality of life has failed to find a relationship between the two. This research, by using community data, establishes an association between the local environment and perceived life quality, and in doing so, provides empirical support for focusing on local as welt as national investigations of life quality.  相似文献   
127.
Ryff’s (1989b) Psychological Well-Being (PWB) scales measure six related constructs of human functioning. The present paper examined the validity of Ryff’s 6-factor PWB model, using data from a life events study (N = 401) and an organisational climate study (N = 679). Previous validation studies, using Confirmatory Factor Analysis (CFA), have identified alternative PWB models, but limitations include the use of shorter scale versions with items relating to a number of life domains within the same PWB factor, and failure to examine the influence of participants’ socio-demographic characteristics on PWB. In this study, Exploratory Factor Analysis (EFA) mostly found consistency in the PWB items and structure between the two studies whereby a 3-factor model delineated between items relating to Autonomy, Positive Relations and a super-ordinate factor comprising the other PWB factors. Using CFA, Goodness of Fit indices reached acceptable levels for the adjusted PWB model identified by the EFA, whilst differences between adjusted models of PWB previously identified in the literature were hardly evident. Post-hoc analysis by gender demonstrated socio-demographic effects on the structure and items that comprise PWB. Further development of PWB measures is needed to reflect its hierarchical and multi-dimensional nature. In the scales’ current form, the construct validation of the PWB factors will continue to be problematic and will fail to adequately evaluate the nature and impact of PWB.  相似文献   
128.
If a specific biological mechanism could be determined by which a carcinogen increases lung cancer risk, how might this knowledge be used to improve risk assessment? To explore this issue, we assume (perhaps incorrectly) that arsenic in cigarette smoke increases lung cancer risk by hypermethylating the promoter region of gene p16INK4a, leading to a more rapid entry of altered (initiated) cells into a clonal expansion phase. The potential impact on lung cancer of removing arsenic is then quantified using a three‐stage version of a multistage clonal expansion (MSCE) model. This refines the usual two‐stage clonal expansion (TSCE) model of carcinogenesis by resolving its intermediate or “initiated” cell compartment into two subcompartments, representing experimentally observed “patch” and “field” cells. This refinement allows p16 methylation effects to be represented as speeding transitions of cells from the patch state to the clonally expanding field state. Given these assumptions, removing arsenic might greatly reduce the number of nonsmall cell lung cancer cells (NSCLCs) produced in smokers, by up to two‐thirds, depending on the fraction (between 0 and 1) of the smoking‐induced increase in the patch‐to‐field transition rate prevented if arsenic were removed. At present, this fraction is unknown (and could be as low as zero), but the possibility that it could be high (close to 1) cannot be ruled out without further data.  相似文献   
129.
130.
This article discusses the experience of place in a profoundly divided urban area of Sheffield. At a time when the gap between affluence and poverty has reached its widest point since the 1960s, this article explores the relationship between individuals and their sense of place and of the trenchant divisions separating communities. The study employs various methods but centres upon the use of hand-drawn maps; creating a dialogue between the interviewers and a number of local residents. These maps and the accompanying commentaries demonstrate the diverse individual sense of a particular place and a dialectical sense of space. The resulting picture is one of both the persistence of historical divisions, suggesting regulation and control through planning and policing, but also of complex entanglements of social identities, habitus and place which defy easy categorisation.  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