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   5253篇
  免费   111篇
  国内免费   87篇
  2024年   6篇
  2023年   26篇
  2022年   26篇
  2021年   43篇
  2020年   65篇
  2019年   56篇
  2018年   68篇
  2017年   74篇
  2016年   71篇
  2015年   58篇
  2014年   61篇
  2013年   189篇
  2012年   53篇
  2011年   37篇
  2010年   29篇
  2009年   48篇
  2008年   58篇
  2007年   54篇
  2006年   51篇
  2005年   44篇
  2004年   34篇
  2003年   41篇
  2002年   30篇
  2001年   37篇
  2000年   14篇
  1999年   21篇
  1998年   18篇
  1997年   6篇
  1996年   11篇
  1995年   12篇
  1994年   9篇
  1993年   7篇
  1992年   7篇
  1990年   3篇
  1989年   5篇
  1988年   6篇
  1987年   6篇
  1985年   334篇
  1984年   400篇
  1983年   291篇
  1982年   308篇
  1981年   345篇
  1980年   358篇
  1979年   340篇
  1978年   367篇
  1977年   288篇
  1976年   267篇
  1975年   258篇
  1974年   273篇
  1973年   235篇
排序方式: 共有5451条查询结果,搜索用时 15 毫秒
961.
962.
This paper presents a practical implementation of multicriteria methodologies based on the UTA model by Jacquet‐Lagrèze and Siskos and Quasi‐UTA model by Beuthe and Scannella, which are specified with a non‐linear, but piecewise linear, additive utility function. In contrast with the general UTA model, the Quasi‐UTA specification structures the partial utilities as recursive exponential functions of only one curvature parameter. This allows for a reduction of the quantity of information necessary to build the utility function. The software MUSTARD implements different variants of these models. Firstly, it offers the basic deterministic UTA model of disaggregation, but also its first programmed stochastic version. In both cases, the software proceeds stepwise and interactively helping the decision maker to formulate the problem and state preferences between projects; in the stochastic case, the decision maker is even helped to build the criteria distributions. The Quasi‐UTA specification can be introduced in this disaggregation model. Secondly, the software offers an aggregation model whereby the Quasi‐UTA partial utility functions are built separately through specific questioning processes. The questions relating to deterministic criteria are of the ‘direct rating type’, while those of the stochastic criteria are either of the ‘variable probability’ or the ‘variable outcome’ type. The criteria weights can be assessed by the ‘swing weight’ method or by a UTA‐II side‐program. As an example as well as a test of the Quasi‐UTA aggregation approach, the paper presents its application to a real problem of selecting road investment projects in Belgium. Several experts and civil servants were interviewed, and their individual utility functions derived. The projects are ranked according to their rate of return, which is computed on the basis of the projects certain equivalent money value. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
963.
964.
Those who conduct integrated assessments (IAs) are aware of the need to explicitly consider multiple criteria and uncertainties when evaluating policies for preventing global warming. MCDM methods are potentially useful for understanding tradeoffs and evaluating risks associated with climate policy alternatives. A difficulty facing potential MCDM users is the wide range of different techniques that have been proposed, each with distinct advantages. Methods differ in terms of validity, ease of use, and appropriateness to the problem. Alternative methods also can yield strikingly different rankings of alternatives. A workshop was held in which climate change experts and policy makers evaluated the usefulness of MCDM for IA. Participants applied several methods in the context of a hypothetical greenhouse gas policy decision. Methods compared include value and utility functions, goal programming, ELECTRE, fuzzy sets, stochastic dominance, min max regret, and several weight selection methods. Ranges, rather than point estimates, were provided for some questions to incorporate imprecision regarding weights. Additionally, several visualization methods for both deterministic and uncertain cases were used and evaluated. Analysis of method results and participant feedback through questionnaires and discussion provide the basis for conclusions regarding the use of MCDM methods for climate change policy and IA analyses. Hypotheses are examined concerning predictive and convergent validity of methods, existence of splitting bias among experts, perceived ability of methods to aid decision‐making, and whether expressing imprecision can change ranking results. Because participants gained from viewing a problem from several perspectives and results from different methods often significantly differed, it appears worthwhile to apply several MCDM methods to increase user confidence and insight. The participants themselves recommended such multimethod approaches for policymaking. Yet they preferred the freedom of unaided decision‐making most of all, challenging the MCDM community to create transparent methods that permit maximum user control. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
965.
生命意义的内涵、测量及功能   总被引:3,自引:0,他引:3  
研究者通常用目的和含义来定义生命意义,或者把它定义为多维度的结构。认知、动机和情感是被提及最多的生命意义的组成维度。动机和认知维度得到了较多研究者的认可,而情感维度存在较大争议。生命意义是幸福不可或缺的元素,它能够影响许多与幸福有关的变量。目前的研究对生命意义的动机维度(生命意义寻求)及如何获得和提高生命意义研究较少,今后的研究可针对这两方面开展。  相似文献   
966.
967.
An intermediate step is introduced to the dialogue decision process for decision analysis. Alternatives are refined after they have been generated within a strategy table but before they are subject to more detailed evaluation. Two or more judges create a subjective mapping from alternatives to attributes that will later be mapped to criteria. In strategy tables, each of the alternative strategies consists of a coherent set of choices made across several decisions that are to be coordinated. These strategic alternatives are modified so as to increase their differentiation in the attribute space, rather than in the decision space alone. When criteria weights are unknown, the best alternative from the modified set may be superior to the best alternative from the original set. Furthermore, analysis of the resulting alternatives may yield a better mapping of the value response surface for the action space, in the sense that this mapping leads to eventual construction of a higher value alternative. Results are reported for a consulting engagement incorporating the proposed step. Copyright © 2003 John Wiley & Sons, Ltd.  相似文献   
968.
张勇  龙立荣 《心理学报》2013,45(3):363-376
采用296对上下级匹配数据考察了绩效薪酬对创造力的影响以及人-工作匹配的调节效应和创造力自我效能的中介效应。研究结果表明:绩效薪酬对创造力有倒U形影响;创造力自我效能部分中介了绩效薪酬对创造力的倒U形影响;人-工作匹配调节绩效薪酬与创造力的关系,人-工作匹配度越高,中等强度绩效薪酬的正面效应越强,高强度绩效薪酬的负面效应越弱;绩效薪酬与人-工作匹配的交互效应通过创造力自我效能的完全中介效应影响创造力。  相似文献   
969.
Personality development in emerging adults who do not attend college after high school has been largely overlooked so far. In this study, we investigated personality development in emerging German adults (NT1 = 1,886, MageT1 = 18.01 years, 29% female) undergoing vocational education and training (VET). The trainees were assessed at the start of VET, 1.5 years later, and another 1.5 years after that, just before graduation. Longitudinal latent change score analyses were applied. Bivariate analyses investigated life satisfaction and job strain as social and work‐related aspects that are potentially reciprocally related to personality development. Mean‐level personality changes included increases in neuroticism and decreases in agreeableness and conscientiousness in the first interval. In the second interval, neuroticism decreased and conscientiousness increased. Simultaneously, trainees reported a gradual decrease in extraversion and openness across the 3‐year time span. Personality, especially agreeableness and conscientiousness, emerged as a stronger predictor of changes in job strain and life satisfaction than vice versa. For example, more agreeable and more conscientious trainees subsequently showed increases in life satisfaction. Trainees reporting higher job strain subsequently showed decreases in agreeableness. Trajectories of personality development partly support the maturity principle that has been established in many college student samples.  相似文献   
970.
The incompatibility of Islam with democracy has been the focal point of many public and scholarly debates. However, very few studies have attempted to investigate empirically whether the followers of Islam are less favorable to democracy than the followers of Christianity. This study extends previous research by conducting empirical and representative analyses of whether Muslims in general and religious and practicing Muslims in particular prefer democracy less than their Christian counterparts. Using country fixed effects regression and data from the World Values Survey (WVS6) that include 52,326 Muslims and Christians, the analyses show that Muslims in general, as well as religious and practicing Muslims, endorse democracy to the same extent as do Christians. Thereby, this study is the first to provide comparative, individual‐level evidence of the influence these religions may have on democratic attitudes.  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