全文获取类型
收费全文 | 34712篇 |
免费 | 1011篇 |
国内免费 | 1篇 |
专业分类
管理学 | 4375篇 |
民族学 | 198篇 |
人才学 | 6篇 |
人口学 | 3214篇 |
丛书文集 | 172篇 |
教育普及 | 3篇 |
理论方法论 | 3224篇 |
现状及发展 | 1篇 |
综合类 | 389篇 |
社会学 | 17556篇 |
统计学 | 6586篇 |
出版年
2023年 | 192篇 |
2022年 | 140篇 |
2021年 | 210篇 |
2020年 | 566篇 |
2019年 | 892篇 |
2018年 | 972篇 |
2017年 | 1293篇 |
2016年 | 969篇 |
2015年 | 696篇 |
2014年 | 917篇 |
2013年 | 6019篇 |
2012年 | 1227篇 |
2011年 | 1162篇 |
2010年 | 867篇 |
2009年 | 783篇 |
2008年 | 961篇 |
2007年 | 912篇 |
2006年 | 899篇 |
2005年 | 752篇 |
2004年 | 764篇 |
2003年 | 683篇 |
2002年 | 704篇 |
2001年 | 833篇 |
2000年 | 727篇 |
1999年 | 721篇 |
1998年 | 572篇 |
1997年 | 501篇 |
1996年 | 525篇 |
1995年 | 532篇 |
1994年 | 472篇 |
1993年 | 466篇 |
1992年 | 543篇 |
1991年 | 531篇 |
1990年 | 510篇 |
1989年 | 462篇 |
1988年 | 452篇 |
1987年 | 394篇 |
1986年 | 412篇 |
1985年 | 447篇 |
1984年 | 420篇 |
1983年 | 397篇 |
1982年 | 316篇 |
1981年 | 270篇 |
1980年 | 300篇 |
1979年 | 319篇 |
1978年 | 258篇 |
1977年 | 236篇 |
1976年 | 196篇 |
1975年 | 199篇 |
1974年 | 175篇 |
排序方式: 共有10000条查询结果,搜索用时 187 毫秒
981.
The performance of the usual Shewhart control charts for monitoring process means and variation can be greatly affected by nonnormal data or subgroups that are correlated. Define the αk-risk for a Shewhart chart to be the probability that at least one “out-of-control” subgroup occurs in k subgroups when the control limits are calculated from the k subgroups. Simulation results show that the αk-risks can be quite large even for a process with normally distributed, independent subgroups. When the data are nonnormal, it is shown that the αk-risk increases dramatically. A method is also developed for simulating an “in-control” process with correlated subgroups from an autoregressive model. Simulations with this model indicate marked changes in the αk-risks for the Shewhart charts utilizing this type of correlated process data. Therefore, in practice a process should be investigated thoroughly regarding whether or not it is generating normal, independent data before out-of-control points on the control charts are interpreted to be due to some real assignable cause. 相似文献
982.
H. F. J. M. Van Tuijl 《Work and stress》2013,27(3):311-326
Abstract The central theme of this article is performance management, defined as activities of organizations aimed at an effective and efficient use of their human resources. The organization focused on in particular is the hospital. Three principles taken from motivation theory are dealt with which are basic to performance management: goal setting, feedback and reinforcement. Next, a recently developed procedure (Pritchard 1990, Pritchard et al. 1988, 1989) for the design of performance management systems is described. This procedure, ProMES: Productivity Measurement and Enhancement Systems, is explained using a team of ward nurses as a hypothetical example. In addition to the nursing wards example, other potential applications of the ProMES technique to several hospitals areas are mentioned. Finally, some conditions that should be fulfilled in order to successfully start a ProMES project are discussed. 相似文献
983.
Getulio Jose amorim Amaral Olga Patricia reyes Floréz Francisco José A Cysneiros 《统计学通讯:模拟与计算》2013,42(8):1801-1814
We describe methods to detect influential observations in a sample of pre-shapes when the underlying distribution is assumed to be complex Bingham. One of these methods is based on Cook's distance, which is derived from the likelihood of the complex Bingham distribution. Other method is related to the tangent space, which is based on the local influence for the multivariate normal distribution. A method to detect outliers is also explained. The application of the methods is illustrated in both a real dataset and a simulated sample. 相似文献
984.
M. Safiul Haq 《统计学通讯:理论与方法》2013,42(9):857-866
The location-scale model with equi-correlated responses is discussed. The structure of the location-scale model is utilised to genera-te the prediction distribution of a future response and that of a set of future responses. The method avoids the integration procedures usually involved in derivation of prediction distributions and yields results same as those obtained by the Bayes method with the vague prior distribution* Finally the re-suits have been specialised to cover the case of the normal intra-class model. 相似文献
985.
Loretta M. Kopelman 《Accountability in research》2013,20(3-4):177-192
The Maryland Court of Appeals in Grimes v. Kennedy Krieger Institute was sharply critical of the lead abatement study conducted by this Institute, an affiliate of Johns Hopkins University. Grimes ruled that investigators might, given the facts of the case, have a special relationship with subjects, thereby creating a duty of care that could, if breached, give rise to an action in negligence. This ruling has implications for pediatric research practices and long-standing disputes among informed people of good will about what pediatric studies should be permitted. 相似文献
986.
Ruth M. Mickey 《统计学通讯:理论与方法》2013,42(3):755-759
For a large series of IxJ tables, each containing two observations, the bias of the maximum likelihood estimates of log linear partial association parameters is shown to be equal to the parameters, regardless of the size of I and J. The partial association considered is that between row and column variables; the three way interactions are assumed to be O. This is a generalization of Andersen's results (1973a, 1973b) for a series of 2x2 tables. 相似文献
987.
Hulya Dagdeviren Simon A. Robertson 《Development policy review : the journal of the Overseas Development Institute》2011,29(4):485-505
This article reviews the changing perspectives for improving access to water in the slums of developing countries, especially in sub‐Saharan Africa. While much of the literature continues to maintain an aversion to state‐led urban development policies, there is now increasing emphasis on the importance of informal, small‐scale providers and communitarian initiatives, following the many failures of privatisation. The article argues that market‐oriented solutions are inappropriate for sub‐Saharan African countries where over two‐thirds of the urban population live in squatter settlements with multidimensional challenges. 相似文献
988.
Symbolic interactionism provides a major contribution to understanding inequality by illuminating the various manifestations and contexts of inequality at the micro, everyday level of social life. Drawing on a spectrum of symbolic interactionist theory and research, we examine the range of symbolic and interactional manifestations of social inequality, the consequences of being the object of patterned interactional affronts, and the strategies people use to negotiate interactional stigmatization in everyday life. We argue that symbolic interaction's unique contribution to understanding inequality results from two of the perspective's central features. First, symbolic interactionism emphasizes the necessity of investigating social life in situated social interaction. Second, it highlights social actors' capacities to interpret and construct lines of action rather than respond directly to the stimuli they encounter. Symbolic interactionist research and theory thus contribute to a more complex understanding of social stratification than that provided by perspectives focused exclusively on macroscopic structural factors. 相似文献
989.
Annelies E. M. van Vianen Irene E. De Pater Paul T. Y. Preenen 《The Career development quarterly》2009,57(4):298-309
Today, young adults are expected to decide between educational, vocational, and job options and to make the best choice possible. Career literatures emphasize the importance of young adults' career decision making but also acknowledge the problems related to making these decisions. The authors argue that career counselors could support clients' intuitive processing of career information and help their clients to develop a positive and flexible view of the self and the environment while diminishing concerns about accountability for and irreversibility of career decisions. The authors argue that career adaptability rather than decision making should become the focal concept of career theory and practice. 相似文献
990.
ABSTRACTOn the basis of Csiszar's φ-divergence discrimination information, we propose a measure of discrepancy between equilibriums associated with two distributions. Proving that a distribution can be characterized by associated equilibrium distribution, a Renyi distance of the equilibrium distributions is constructed that made us to propose an EDF-based goodness-of-fit test for exponential distribution. For comparing the performance of the proposed test, some well-known EDF-based tests and some entropy-based tests are considered. Based on the simulation results, the proposed test has better powers than those of competing entropy-based tests for the alternatives with decreasing hazard rate function. The use of the proposed test is evaluated in an illustrative example. 相似文献