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   435篇
  免费   28篇
各国政治   31篇
工人农民   79篇
世界政治   42篇
外交国际关系   17篇
法律   164篇
中国政治   5篇
政治理论   120篇
综合类   5篇
  2024年   1篇
  2023年   4篇
  2021年   6篇
  2020年   8篇
  2019年   18篇
  2018年   23篇
  2017年   26篇
  2016年   25篇
  2015年   23篇
  2014年   15篇
  2013年   71篇
  2012年   17篇
  2011年   19篇
  2010年   12篇
  2009年   11篇
  2008年   11篇
  2007年   16篇
  2006年   14篇
  2005年   9篇
  2004年   10篇
  2003年   11篇
  2002年   8篇
  2001年   13篇
  2000年   11篇
  1999年   11篇
  1998年   5篇
  1997年   12篇
  1996年   5篇
  1995年   6篇
  1994年   3篇
  1993年   7篇
  1992年   1篇
  1991年   3篇
  1990年   3篇
  1989年   2篇
  1988年   2篇
  1987年   3篇
  1986年   2篇
  1985年   2篇
  1984年   1篇
  1983年   4篇
  1982年   1篇
  1978年   1篇
  1977年   2篇
  1976年   1篇
  1975年   2篇
  1974年   2篇
排序方式: 共有463条查询结果,搜索用时 15 毫秒
411.
Although a relatively high percentage of Australian adolescents experience mental health problems, many disturbed adolescents do not receive the help they require, and only a small proportion of adolescents seek professional psychological help. The present study examined adolescents' willingness to seek help and investigated factors that promote and prevent adolescents from seeking help for a mental illness from both formal and informal sources. Secondary school students (254 in number) from schools in Brisbane, Australia completed a questionnaire that examined the relationship between demographic and psychological variables, attitudes toward mental illness, and willingness to seek help for a mental illness. Results suggest that adolescents with greater adaptive functioning, fewer perceived barriers to help seeking, and higher psychological distress were more willing to seek help from formal and informal sources for a mental illness. Greater social support also predicted willingness to seek help from informal sources. Although attitudes toward mental illness did not influence willingness to seek help, less stigmatising attitudes were related to higher knowledge of mental illness, being female, and higher levels of social support. Implications for the present study focus on enhancing the ability of mental health interventions to increase adolescents' willingness to seek psychological help.Received PhD from The University of Queensland  相似文献   
412.
413.
414.
415.
Scholars have variously queried the existence of the Anglo-American “special relationship,” consigned it to history as “special no more,” or demanded that Britain choose between its European and American relationships. These critiques have become increasingly prevalent since the Cold War. Yet the current British government, like many before it, continues to portray a choice between America and Europe as a “false choice,” and the “special relationship” has arguably deepened in the wake of the September 11 terrorist attacks. This article contends that international diplomatic history can contribute much to understanding the “Lazarus-like” quality of the “special relationship.” Specifically it argues that a number of critical continuities in post-World War II British foreign policy survived the end of the Cold War and have since contributed heavily to the determination of the British foreign policymaking elite to maintain the “special relationship” at the same time that Britain pursues a leadership role within Europe.  相似文献   
416.
The English High Court recently refused to grant an injunction to restrain The Times newspaper from publishing the identity of an anonymous political blogger (The author of a blog v Times Newspapers Limited [2009] EWHC 1358 (QB)). The facts of the case were unusual: there was no clearly unlawful behaviour by the blogger, who was also a police officer highly critical of political figures and policies. There was also no relationship between the blogger and the journalist who deduced the blogger's identity; the court therefore focussed on the tort of misuse of private information and countervailing public interests, such as freedom of expression. This article describes the approach of the court and considers the earlier case of Mahmood v Galloway ([2006] EWHC 1286 (QB)) concerning an undercover journalist's attempt to prevent publication of photographs showing what he looked like. It also discusses whether data protection law could have a role to play in future cases concerning attempts to preserve an online author's anonymity. The conclusion of the article is that this case does not spell the end of all anonymous blogging.  相似文献   
417.
418.
Permeability and Burglary Risk: Are Cul-de-Sacs Safer?   总被引:1,自引:0,他引:1  
That crime is concentrated in space is now accepted as commonplace. Explanations for why it clusters at particular locations are various reflecting the range of factors which are held to influence crime placement. In this article, we focus on the role of the permeability of the street network on the location of crime. We first review the research conducted hitherto, summarising the different approaches to analysis and the findings that have so far emerged. Then we present original analyses conducted at the street segment level to examine the issues at hand. In contrast to much of the prior research, in this study we examine the patterns for a large study area in which there is considerable variation in street network configuration. Moreover, and in contrast to all of the previous research, the approach to analysis takes into account the multi-level structure of the data analysed. The findings demonstrate that increased permeability is associated with elevated burglary risk, that burglary risk is lower on cul-de-sacs (particularly those that are sinuous in nature), and that the risk of burglary is higher on more major roads and those street segments that are connected to them. In the conclusion of the paper we outline an agenda for future research.  相似文献   
419.
Pickert K 《Time》2012,179(20):32-39
  相似文献   
420.

Objectives

Decades of empirical research demonstrate that crime is concentrated at a range of spatial scales, including street segments. Further, the degree of clustering at particular geographic units remains noticeably stable and consistent; a finding that Weisburd (Criminology 53:133–157, 2015) has recently termed the ‘law of crime concentration at places’. Such findings suggest that the future locations of crime should—to some extent at least—be predictable. To date, methods of forecasting where crime is most likely to next occur have focused either on area-level or grid-based predictions. No studies of which we are aware have developed and tested the accuracy of methods for predicting the future risk of crime at the street segment level. This is surprising given that it is at this level of place that many crimes are committed and policing resources are deployed.

Methods

Using data for property crimes for a large UK metropolitan police force area, we introduce and calibrate a network-based version of prospective crime mapping [e.g. Bowers et al. (Br J Criminol 44:641–658, 2004)], and compare its performance against grid-based alternatives. We also examine how measures of predictive accuracy can be translated to the network context, and show how differences in performance between the two cases can be quantified and tested.

Results

Findings demonstrate that the calibrated network-based model substantially outperforms a grid-based alternative in terms of predictive accuracy, with, for example, approximately 20 % more crime identified at a coverage level of 5 %. The improvement in accuracy is highly statistically significant at all coverage levels tested (from 1 to 10 %).

Conclusions

This study suggests that, for property crime at least, network-based methods of crime forecasting are likely to outperform grid-based alternatives, and hence should be used in operational policing. More sophisticated variations of the model tested are possible and should be developed and tested in future research.
  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