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   3618篇
  免费   181篇
管理学   442篇
民族学   33篇
人口学   367篇
丛书文集   15篇
理论方法论   437篇
综合类   37篇
社会学   1914篇
统计学   554篇
  2023年   43篇
  2022年   12篇
  2021年   36篇
  2020年   99篇
  2019年   134篇
  2018年   163篇
  2017年   205篇
  2016年   131篇
  2015年   102篇
  2014年   140篇
  2013年   662篇
  2012年   185篇
  2011年   163篇
  2010年   129篇
  2009年   109篇
  2008年   118篇
  2007年   122篇
  2006年   126篇
  2005年   94篇
  2004年   85篇
  2003年   98篇
  2002年   100篇
  2001年   70篇
  2000年   54篇
  1999年   61篇
  1998年   45篇
  1997年   33篇
  1996年   42篇
  1995年   40篇
  1994年   27篇
  1993年   42篇
  1992年   38篇
  1991年   33篇
  1990年   18篇
  1989年   18篇
  1988年   19篇
  1987年   17篇
  1986年   13篇
  1985年   18篇
  1984年   21篇
  1983年   15篇
  1982年   20篇
  1981年   20篇
  1980年   15篇
  1979年   9篇
  1978年   7篇
  1977年   7篇
  1976年   5篇
  1975年   10篇
  1974年   10篇
排序方式: 共有3799条查询结果,搜索用时 375 毫秒
71.
Kent  Christoph W.  Lee  Keunmin  Ward  Helen C.  Hong  Je-Woo  Hong  Jinkyu  Gatey  David  Grimmond  Sue 《Urban Ecosystems》2018,21(2):227-243
Urban Ecosystems - Local aerodynamic roughness parameters (zero-plane displacement, z d , and aerodynamic roughness length, z 0 ) are determined for an urban park and a suburban neighbourhood with...  相似文献   
72.
Sea levels are rising in many areas around the world, posing risks to coastal communities and infrastructures. Strategies for managing these flood risks present decision challenges that require a combination of geophysical, economic, and infrastructure models. Previous studies have broken important new ground on the considerable tensions between the costs of upgrading infrastructure and the damages that could result from extreme flood events. However, many risk-based adaptation strategies remain silent on certain potentially important uncertainties, as well as the tradeoffs between competing objectives. Here, we implement and improve on a classic decision-analytical model (Van Dantzig 1956) to: (i) capture tradeoffs across conflicting stakeholder objectives, (ii) demonstrate the consequences of structural uncertainties in the sea-level rise and storm surge models, and (iii) identify the parametric uncertainties that most strongly influence each objective using global sensitivity analysis. We find that the flood adaptation model produces potentially myopic solutions when formulated using traditional mean-centric decision theory. Moving from a single-objective problem formulation to one with multiobjective tradeoffs dramatically expands the decision space, and highlights the need for compromise solutions to address stakeholder preferences. We find deep structural uncertainties that have large effects on the model outcome, with the storm surge parameters accounting for the greatest impacts. Global sensitivity analysis effectively identifies important parameter interactions that local methods overlook, and that could have critical implications for flood adaptation strategies.  相似文献   
73.
The goal of this study was to examine child and parent predictors of children's hostile attribution bias (HAB) with a particular focus on exploring the associations between parents’ early attribution of child misbehavior and children's HAB in the transition to school age. Participants were 241 children (118 girls) of middle‐income families who were at risk for school‐age conduct problems. Multi‐method, multi‐informant data were collected on maternal attributions of child misbehavior, parental use of corporal punishment, and child attributes (i.e., verbal IQ, effortful control, theory of mind, and emotional understanding) at 3 years, and child HAB in ambiguous situations at 6 years. Results indicated that mothers’ internal explanations for children's misconduct may either reduce or increase children's later HAB depending on the specific content of attributions, such that mothers’ belief that children misbehave because of their internal state (i.e., emotional state or temperament) was associated with lower levels of child HAB, whereas attributing power‐based motives (i.e., manipulative, controlling intentions) in children was associated with higher levels of HAB. The findings are discussed with respect to appreciating the complexity of parents’ explanations for children's behavior, and considering parental cognition as a potential target for early identification and prevention of child HAB and related problems.  相似文献   
74.
“Cruising” infants can only walk using external support to augment their balance. We examined cruisers' understanding of support for upright locomotion under four conditions: cruising over a wooden handrail at chest height, a large gap in the handrail, a wobbly unstable handrail, and an ill‐positioned low handrail. Infants distinguished among the support properties of the handrails with differential attempts to cruise and handrail‐specific forms of haptic exploration and gait modifications. They consistently attempted the wood handrail, rarely attempted the gap, and occasionally attempted the low and wobbly handrails. On the wood and gap handrails, attempt rates matched the probability of cruising successfully, but on the low and wobbly handrails, attempt rates under‐ and overestimated the probability of success, respectively. Haptic exploration was most frequent and varied on the wobbly handrail, and gait modifications—including previously undocumented “knee cruising”—were most frequent and effective on the low handrail. Results are discussed in terms of developmental changes in the meaning of support.  相似文献   
75.
76.
77.
Employment for people with learning difficulties is considered key to their social inclusion. This contradicts the perceived un-employability of people with learning difficulties that has been part of their social identities throughout their history hitherto. The national rate of employment for people with learning difficulties remains extremely low and has barely changed in the 20?years between 1990 and 2010. This paper investigates links between learning disabilities and employment, drawing on interview-based research. It analyses the quality of experience of the minority in employment to consider whether employment can serve the inclusive purpose expected of it.  相似文献   
78.
79.
80.
This article explores the phenomenological and socially constructed experience of time during the finite period of the vacation. Temporal routine is considered as a form of social control from which vacations and similar breaks for time off offer opportunities for agency and release. In-depth interviews, participant observation, and a narrative analysis of vacation blogs are used to analyze norms in orientation to time while one is away from select constraints of everyday life. Approaches to time while on vacation are found to fall into two ideal types: those who may ??ignore?? time and find release from schedules and routine, and those who must closely attend to its passage. Influences of duration, frequency and pace are also central in moderating experience.  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