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   1004篇
  免费   40篇
各国政治   52篇
工人农民   75篇
世界政治   69篇
外交国际关系   66篇
法律   487篇
中国政治   11篇
政治理论   265篇
综合类   19篇
  2022年   4篇
  2021年   11篇
  2020年   16篇
  2019年   24篇
  2018年   31篇
  2017年   48篇
  2016年   45篇
  2015年   22篇
  2014年   39篇
  2013年   157篇
  2012年   30篇
  2011年   40篇
  2010年   20篇
  2009年   22篇
  2008年   30篇
  2007年   37篇
  2006年   32篇
  2005年   24篇
  2004年   31篇
  2003年   26篇
  2002年   17篇
  2001年   16篇
  2000年   21篇
  1999年   19篇
  1998年   11篇
  1997年   16篇
  1996年   12篇
  1995年   12篇
  1994年   11篇
  1993年   15篇
  1992年   10篇
  1991年   16篇
  1990年   10篇
  1989年   14篇
  1988年   11篇
  1987年   7篇
  1986年   9篇
  1985年   10篇
  1984年   14篇
  1983年   11篇
  1982年   11篇
  1981年   12篇
  1980年   12篇
  1979年   11篇
  1978年   6篇
  1977年   6篇
  1976年   7篇
  1973年   4篇
  1972年   3篇
  1971年   3篇
排序方式: 共有1044条查询结果,搜索用时 15 毫秒
981.
This paper analyzes the relationships of schooling, the skill content of work experience, and different types of employment patterns with less‐skilled women's job quality outcomes. Survey data from employers and longitudinal data from former and current welfare recipients are used for the period 1997 to early 2002. The analysis of job quality is broadened beyond employment rates and wages measured at a point in time by including non‐wage attributes of compensation and aspects of jobs that affect future earnings potential. This study shows the extent to which lack of employment stability, job skills, and occupation‐specific experience impedes welfare recipients' abilities to obtain a “good job” or to transition into one from a “bad job.” The business cycle downturn has significantly negatively affected the job quality and job transition patterns of former and current recipients. © 2003 by the Association for Public Policy Analysis and Management.  相似文献   
982.
Automated scanning electron microscopy coupled with image analysis and X-ray micro analysis was used to characterize a variety of gunshot residue (GSR) samples. More than 500 rounds of commercially available ammunition and six different types of hand gulls were used in the study of 17 GSR and 19 reference specimens. The individual particle X-ray composition was determined for 12 different elements. Elemental composition of GSR particles was highly variable but consistent with compounds mixed into or associated with a barium oxide matrix. When present in a specimen, GSR could be adequately characterized with automated procedures in less than an hour by restricting analyses to features larger than 2 microm. In "clean" samples, a higher resolution particle search was required to avoid reporting false negatives. Careful control of the back scattered electron signal strength threshold, by reference to a standard, was needed to ensure both time-efficient and accurate analyses. Samples collected from non-shooting subjects. active in a physical environment which contained firearms discharge residue were seen to be easily contaminated by sub-micron GSR particles.  相似文献   
983.
984.
A prospective longitudinal study was conducted to investigate whether anxiety, depressive, personality, or substance use disorders increase risk for onset of bulimia nervosa (BN) or binge eating disorder (BED) during adolescence. Axis I and II psychiatric disorders were assessed in a primary care sample of 201 adolescents. Axis I disorders were reassessed 10 months later. Youths with dysthymic disorder were at elevated risk for the onset or recurrence of BN or BED after preexisting psychiatric disorders were controlled statistically. Problems with depression or anxiety tended to precede the onset of eating problems. In addition, youths with eating disorder symptoms were at elevated risk for the onset or recurrence of depressive disorders. These findings suggest that adolescents with chronic depressive symptoms may be at elevated risk for the development of BN or BED, and that adolescents with eating disorder symptoms may be at elevated risk for the development of depressive disorders.  相似文献   
985.
Multilevel growth curve models provide a means of analyzing individual differences in the growth of deviance, allow a number of theories to be integrated in a single model, and can help to unify research on deviant/delinquent/criminal careers at different stages of the life cycle. Building on the distinction between population heterogeneity and state dependence as alternative explanations of persistent individual differences in deviance (Heckman, 1981; Nagin and Paternoster, 1991), we show that models with two levels can be used to represent and analyze a variety of criminological theories. The first level (level 1) uses repeated measurements on individuals to estimate individual-level growth curves. The second level treats the level 1 growth curve parameters (e.g., slope, intercept) as outcome variables and uses time-invariant factors to explain variation in these parameters across individuals. We illustrate this approach by estimating a model of growth in deviance drawn from Gottfredson and Hirschi's deviant propensity theory. An innovative feature is the assumption that adolescents' expected growth curves of deviance follow a classical Pearl-Verhulst logistic growth model (Pearl, 1930). The results suggest that five risk factors—parental psychiatric problems, lack of parental support, living arrangements with zero or one parent in residence, low family income, and male gender—have strongly positive effects on deviant propensity. For example, adolescents with no supportive parents, and no other risk factors, have expected asymptotic levels of deviance (peak levels attained at about age 18) that are about twice as high as those of adolescents with no risk factors. Yet more than two-thirds of the individual-level variability in growth curves is unexplained by the five risk factors. This unobserved heterogeneity would remain hidden in analyses using conventional structural equations models and the same explanatory variables.  相似文献   
986.
987.
Forensic neuropsychology continues to grapple with critical determinations of response styles, including the assessment of malingering. The development of the Malingered Neurocognitive Dysfunction (MND) model has been highly influential for both feigning research and neuropsychological practice. In striving to be a comprehensive model of malingering, MND proposes complex criteria for ascertaining possible, probable, and definite levels. In its critical review, this article suggests the possibility of an MND bias towards the over-classification of malingering. It also examines the limits of MND research to adequately test the MND model. The conceptual and empirical limitations of MND are discussed with reference to theory and neuropsychological practice.  相似文献   
988.
989.
990.
Analyses of political development in colonial Africa have largely concentrated on the role of the educated elite in the emergence of nationalist movements. In recent years some attempt has been made to fill out this one-dimensional view through the study of early and more broadly based protest movements in various colonial territories. This paper takes as its subject matter the records of riots which occurred on the Gold Coast between 1890 and 1920. These disturbances are taken as an index of non-elite protest while an analysis of case-studies indicates their significance for political developments leading to the emergence of nationalist parties.  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