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   672篇
  免费   31篇
  2023年   4篇
  2021年   6篇
  2020年   10篇
  2019年   20篇
  2018年   40篇
  2017年   26篇
  2016年   29篇
  2015年   27篇
  2014年   17篇
  2013年   177篇
  2012年   18篇
  2011年   14篇
  2010年   23篇
  2009年   13篇
  2008年   14篇
  2007年   10篇
  2006年   9篇
  2005年   19篇
  2004年   13篇
  2003年   11篇
  2002年   10篇
  2001年   11篇
  2000年   12篇
  1999年   6篇
  1998年   11篇
  1997年   6篇
  1996年   3篇
  1995年   7篇
  1994年   6篇
  1993年   8篇
  1992年   3篇
  1990年   4篇
  1989年   3篇
  1988年   3篇
  1987年   7篇
  1986年   3篇
  1985年   6篇
  1984年   7篇
  1983年   12篇
  1982年   9篇
  1981年   4篇
  1980年   4篇
  1979年   6篇
  1978年   9篇
  1977年   11篇
  1976年   4篇
  1975年   7篇
  1974年   3篇
  1971年   5篇
  1969年   3篇
排序方式: 共有703条查询结果,搜索用时 593 毫秒
81.
82.
83.
官僚政治是体制性官僚主义的表现形态,在政治体制上表现为政府权力不受制约,具有侵犯公民自由和权利的倾向,政府机构官僚主义的泛滥成为必然。在这种政治体制后必定具有特定的文化精神为支撑,封建官僚政治的传统文化精神里的重大缺陷在于缺乏民主的意识和精神,因此民主是防治官僚主义的最佳对策选择。以民主的方式防治官僚主叉是一个如何在政府与个人、集体与个人之间寻求最佳平衡的过程。  相似文献   
84.
85.
Work hard, play hard: selling Kelowna, BC, as year-round playground   总被引:1,自引:1,他引:0  
A keen interest in place making and place selling is widespread in contemporary society. While the bulk of academic research has focused on studying the restructuring of large urban conglomerates, places beyond the exploding metropolis, by comparison, have received little attention, especially when it concerns Canadian landscapes. In an attempt to study the particularities of place making in contemporary smaller, more isolated communities—hinterlands—this work analyses the city of Kelowna, in British Columbia, Canada. We argue that historically Kelowna, a small rural community specialising in ranching, forestry and fruit production, since the early 1980s, has been re-imagined and re-designed, on the one hand as an all-year playground and as an innovative frontier for high-tech industries; on the other hand, this post-Fordist reinvention contains a discourse of 'whiteness', one that entices by packaging 'place' in terms of 'sameness' and 'familiarity'. In contrast to large cosmopolitan post-industrial cities, hinterland-type cities are invented, sought and lived as geographies cleared from the 'elements' that make cities 'unsafe'.  相似文献   
86.
87.
88.
89.
The global war on terror was used by the Bush administration and its allies to defend a US dominated geopolitical configuration. To this end, counter‐terrorism measures (CTMs) were introduced which strengthened the alignment of development aid with diplomacy and defence. The broad, adverse effects of CTMs on civil liberties and human rights are well documented. Despite the advent of a new US administration and a ‘soft power’ approach to international relations, the legacy of the war on terror remains embedded in the laws, policies and attitudes of many states and regimes that continue to enclose the lives of citizens. This article describes the experiences of civil society organizations (CSOs) as ‘securitization’ processes unfolded. Studies over two years involving some forty countries provide an on‐the‐ground view to probe the gains and losses of securitization, both for governments in the US‐led ‘coalition of the willing’ and for civil society in terms of the pressures emerging from a development‐for‐security agenda. The authors identify some of the perverse zero‐sum effects on governments of CTM philosophy and the means employed. Findings also show asymmetry between northern and southern CSOs in terms of their negative‐sum subordination, found in the definition of security and in the vulnerability to new risks involved in undertaking development work.  相似文献   
90.
In this article, we address the problem of allocating an additional cell tower (or a set of towers) to an existing cellular network, maximizing the call completion probability. Our approach is derived from the adaptive spatial sampling problem using kriging, capitalizing on spatial correlation between cell phone signal strength data points and accounting for terrain morphology. Cell phone demand is reflected by population counts in the form of weights. The objective function, which is the weighted call completion probability, is highly nonlinear and complex (nondifferentiable and discontinuous). Sequential and simultaneous discrete optimization techniques are presented, and heuristics such as simulated annealing and Nelder–Mead are suggested to solve our problem. The adaptive spatial sampling problem is defined and related to the additional facility location problem. The approach is illustrated using data on cell phone call completion probability in a rural region of Erie County in western New York, and accounts for terrain variation using a line‐of‐sight approach. Finally, the computational results of sequential and simultaneous approaches are compared. Our model is also applicable to other facility location problems that aim to minimize the uncertainty associated with a customer visiting a new facility that has been added to an existing set of facilities.  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