全文获取类型
收费全文 | 1728篇 |
免费 | 34篇 |
国内免费 | 1篇 |
专业分类
管理学 | 377篇 |
民族学 | 12篇 |
人口学 | 128篇 |
丛书文集 | 9篇 |
理论方法论 | 91篇 |
综合类 | 68篇 |
社会学 | 656篇 |
统计学 | 422篇 |
出版年
2023年 | 26篇 |
2022年 | 22篇 |
2021年 | 15篇 |
2020年 | 39篇 |
2019年 | 52篇 |
2018年 | 88篇 |
2017年 | 118篇 |
2016年 | 114篇 |
2015年 | 56篇 |
2014年 | 71篇 |
2013年 | 248篇 |
2012年 | 104篇 |
2011年 | 69篇 |
2010年 | 64篇 |
2009年 | 62篇 |
2008年 | 55篇 |
2007年 | 58篇 |
2006年 | 73篇 |
2005年 | 58篇 |
2004年 | 49篇 |
2003年 | 31篇 |
2002年 | 47篇 |
2001年 | 32篇 |
2000年 | 31篇 |
1999年 | 11篇 |
1998年 | 6篇 |
1997年 | 5篇 |
1996年 | 9篇 |
1995年 | 6篇 |
1994年 | 6篇 |
1992年 | 4篇 |
1991年 | 7篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1986年 | 4篇 |
1985年 | 4篇 |
1983年 | 5篇 |
1982年 | 6篇 |
1981年 | 4篇 |
1980年 | 4篇 |
1976年 | 5篇 |
1975年 | 4篇 |
1973年 | 5篇 |
1972年 | 4篇 |
1971年 | 5篇 |
1970年 | 8篇 |
1969年 | 7篇 |
1968年 | 9篇 |
1967年 | 4篇 |
1966年 | 9篇 |
排序方式: 共有1763条查询结果,搜索用时 15 毫秒
21.
Simon Bockmühl Andreas König Albrecht Enders Harald Hungenberg Jonas Puck 《Review of Managerial Science》2011,5(4):265-289
The extant literature highlights numerous different factors influencing the timeliness and intensity of incumbent response
to discontinuous technological change. However, this literature has so far not been synthesized and is therefore limited in
its analytical, predictive, and normative power. We develop a comprehensive model of incumbent response that organizes different
explanatory factors into the three distinct dimensions of (1) identification and interpretation, (2) decision making, and
(3) organizational implementation. We also conceptualize how response intensity and timeliness affect business performance
in new technological domains. We test the model against data from 320 firms from the German dental lab industry, finding substantial
support for the majority of our hypotheses. This study offers unique empirical insight in observing that cognitive constructs
such as framing and management flexibility have the strongest impact on both intensity and timeliness of incumbent response
to technological, and thus, strategic discontinuities. Together, our findings have important implications for both theory
and practice. 相似文献
22.
Kontkanen P. Myllymäki P. Silander T. Tirri H. Grünwald P. 《Statistics and Computing》2000,10(1):39-54
In this paper we are interested in discrete prediction problems for a decision-theoretic setting, where the task is to compute the predictive distribution for a finite set of possible alternatives. This question is first addressed in a general Bayesian framework, where we consider a set of probability distributions defined by some parametric model class. Given a prior distribution on the model parameters and a set of sample data, one possible approach for determining a predictive distribution is to fix the parameters to the instantiation with the maximum a posteriori probability. A more accurate predictive distribution can be obtained by computing the evidence (marginal likelihood), i.e., the integral over all the individual parameter instantiations. As an alternative to these two approaches, we demonstrate how to use Rissanen's new definition of stochastic complexity for determining predictive distributions, and show how the evidence predictive distribution with Jeffrey's prior approaches the new stochastic complexity predictive distribution in the limit with increasing amount of sample data. To compare the alternative approaches in practice, each of the predictive distributions discussed is instantiated in the Bayesian network model family case. In particular, to determine Jeffrey's prior for this model family, we show how to compute the (expected) Fisher information matrix for a fixed but arbitrary Bayesian network structure. In the empirical part of the paper the predictive distributions are compared by using the simple tree-structured Naive Bayes model, which is used in the experiments for computational reasons. The experimentation with several public domain classification datasets suggest that the evidence approach produces the most accurate predictions in the log-score sense. The evidence-based methods are also quite robust in the sense that they predict surprisingly well even when only a small fraction of the full training set is used. 相似文献
23.
The efficiency of education in East and Southeast Turkey (E&SE) has long been a subject of debate. Both regions are similar to each other and different from the other regions in terms of economy, culture, ethnic origin, and languages spoken. Sahin (1997) studied the efficiency of education in the E&SE and proposed that illiteracy is significantly the highest in both regions, the female student population is significantly lower, and students are significantly less successful in nationwide general proficiency examinations (OSS and OYS) compared to all the other regions. Social sources of failure were studied in terms of the distinguishing characteristics of both regions, from both practical and theoretical standpoints. The findings indicated inequality of educational opportunity rooted in geographical, economical, social (cultural, linguistic), and political factors. 相似文献
24.
İlknur Aykurt Karlıbel Seyhan Dülger Meliha Kasapoğlu Aksoy Muhammet Güzelsoy Ali Rıza Türkoğlu Lale Altan 《The aging male》2019,22(2):109-115
Objective: This study aims to investigate the effect of smoking on sexual functions in AS patients.Patients and methods: A total of 67 male AS patients with a median age of 34 years (range: 18–57) reporting sexual activity at least for the past 4 weeks period were included. Patients were divided into smokers (Group 1, n?=?47) and non-smokers (Group 2, n?=?20). Fagerström test for nicotine dependence, smoking history, exhaled carbon monoxide test were recorded for smoking AS patients. Visual analogue scale (VAS), Bath Ankylosing Spondylitis Disease Activity Index (BASDAI), Bath Ankylosing Spondylitis Metrology Index (BASMI), Bath Ankylosing Spondylitis Functional Index (BASFI), Ankylosing Spondylitis Quality of Life (ASQoL), International Index of Erectile Function (IIEF), Beck Depression Inventory (BDI) were filled for both groups.Results: There was no significant difference between smokers and non-smokers in all evaluation parameters. BASMI scores were significantly lower in the mild dependency subgroup as compared to those with moderate or severe dependency (p?=?.005 and p?=?.007, respectively). Total IIEF score and IIEF categories correlated significantly with BASDAI, BASFI, BASMI, ASQoL, pain, fatigue, and cumulative smoking. BDI showed an inverse correlation with the IIEF score and IIEF category (p?.001 r?=?–0.520, p?.001 r?=?–0.508, respectively).Conclusions: Sexual function in AS patients is associated with the pain, fatigue, disease activity, functional status, quality of life, depression as well as the cumulative exposure to smoking, and that sexual functions tend to decline with increasing degree of cigarette dependency. 相似文献
25.
26.
The class of affine LIBOR models is appealing since it satisfies three central requirements of interest rate modeling. It is arbitrage-free, interest rates are nonnegative, and caplet and swaption prices can be calculated analytically. In order to guarantee nonnegative interest rates affine LIBOR models are driven by nonnegative affine processes, a restriction that makes it hard to produce volatility smiles. We modify the affine LIBOR models in such a way that real-valued affine processes can be used without destroying the nonnegativity of interest rates. Numerical examples show that in this class of models, pronounced volatility smiles are possible. 相似文献
27.
Hasan Önder 《统计学通讯:模拟与计算》2016,45(10):3528-3533
In this study, it was aimed to determine accuracy of generalized estimating equations versus logistic regressions on different correlation levels and sample sizes. For this aim, two methods were compared with different sample sizes 10, 25, 50 and 100 and correlation levels 0.0, 0.3, 0.5 and 0.8. Result of this study showed that using generalized estimating equations could be preferred versus logistic regression when the sample size is over than 25 and correlation level is higher than 0.3 on data taken from studies with repeated measurements, but logistic regression could be better when the autocorrelations do not exist. 相似文献
28.
Analysing non-doctrinal socialization: re-assessing the role of cognition to account for social cohesion in the Religious Society of Friends 总被引:1,自引:0,他引:1
Plüss C 《The British journal of sociology》2007,58(2):253-275
To incorporate newcomers into membership, a group employs socialization strategies to transform the characteristics of the newcomers, so that it can admit them with the confidence that their behaviour will not endanger group unity. Analyses of socialization emphasize that novices' interiorization of an institutional definition of group behaviour is a necessary condition to ensure successful socialization. The contemporary Religious Society of Friends in Britain, however, is a non-doctrinal religious movement that avoids defining the content of its beliefs and practices. To analyse the socializing interaction between members and newcomers in this movement in Britain, and among co-religionists in the USA, this inquiry applies a model of socialization that does not include assumptions about the role played by cognition in socialization (Long and Hadden 1983). My results show that: (a) the diffuseness in Friends' collective explanations of institutional conduct supports novices' identification with institutional practice, and (b) experimental and affective components in socialization motivate novices to imitate institutional behaviour despite the fact that Friends have no authoritative explanations of such behaviour. The data suggest that socialization and social cohesion are not necessarily as strongly cognitive-oriented phenomena as they were previously thought to be. This finding has important implications for thinking about social cohesion in postmodern society. 相似文献
29.
30.
Angelovski Andrej Di Cagno Daniela Güth Werner Marazzi Francesca 《Theory and Decision》2020,88(1):97-119
Theory and Decision - Lying for a strategic advantage is to be expected in commercial interactions. But would this be more or less obvious when lying could come from either party and question... 相似文献