全文获取类型
收费全文 | 5253篇 |
免费 | 159篇 |
国内免费 | 44篇 |
专业分类
管理学 | 477篇 |
民族学 | 27篇 |
人才学 | 1篇 |
人口学 | 39篇 |
丛书文集 | 355篇 |
理论方法论 | 165篇 |
综合类 | 2343篇 |
社会学 | 269篇 |
统计学 | 1780篇 |
出版年
2024年 | 1篇 |
2023年 | 26篇 |
2022年 | 22篇 |
2021年 | 56篇 |
2020年 | 77篇 |
2019年 | 127篇 |
2018年 | 131篇 |
2017年 | 214篇 |
2016年 | 122篇 |
2015年 | 129篇 |
2014年 | 257篇 |
2013年 | 841篇 |
2012年 | 340篇 |
2011年 | 317篇 |
2010年 | 245篇 |
2009年 | 286篇 |
2008年 | 271篇 |
2007年 | 298篇 |
2006年 | 240篇 |
2005年 | 270篇 |
2004年 | 237篇 |
2003年 | 205篇 |
2002年 | 147篇 |
2001年 | 151篇 |
2000年 | 110篇 |
1999年 | 57篇 |
1998年 | 48篇 |
1997年 | 49篇 |
1996年 | 30篇 |
1995年 | 21篇 |
1994年 | 13篇 |
1993年 | 11篇 |
1992年 | 22篇 |
1991年 | 16篇 |
1990年 | 6篇 |
1989年 | 11篇 |
1988年 | 9篇 |
1987年 | 4篇 |
1986年 | 5篇 |
1985年 | 8篇 |
1984年 | 1篇 |
1983年 | 8篇 |
1982年 | 4篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1977年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有5456条查询结果,搜索用时 218 毫秒
71.
作为党的助手和后备军,中国共产主义青年团紧跟党的步伐,围绕党的中心任务,走过了百年辉煌历程。百年来,共青团坚持党的领导,将党领导团正确的方针政策落到实处;坚持改革,不断增强团围绕党的中心任务而奋斗的能力;教育引导青年,重视青年在革命、建设、改革中的作用,在新民主主义革命时期、社会主义革命和建设时期、改革开放和社会主义现代化建设时期、新时代中国特色社会主义建设时期都作出了重要贡献。未来建设中,共青团要不断突出政治性,增强先进性,保持群众性,巩固、夯实、筑牢其围绕党的中心任务而奋斗的领导基础、政治基础和青年群众基础。 相似文献
72.
近年来,电商平台利用大数据实施消费者杀熟成为社会广泛关注的议题。消费者价格敏感度对大数据杀熟现象具有抑制作用,情感态度在其中具有中介效用,但影响机制需要进一步研究。运用效果层次理论探究消费者价格敏感度对大数据杀熟现象的抑制作用,结果表明:产品差异通过影响消费者的情感态度间接影响消费者对电商平台大数据杀熟的抑制行为,网络口碑则直接影响消费者对电商平台大数据杀熟的抑制行为。消费者应将产品差异、网络口碑纳入个人消费参考标准,以此提高消费者价格敏感度,从消费端来抑制电商平台大数据杀熟行为。 相似文献
73.
本文通过对大学英语教学特点的分析,探讨了大学英语教学过程能否交际化的问题,从理论和实践两方面论述了外语课堂所培养的交际能力与社会交际能力之间的差异,最后指出“弱式”交际能力的理论对大学英语教学更具有实际指导意义。 相似文献
74.
Dynamic reliability models with conditional proportional hazards 总被引:1,自引:0,他引:1
A dynamic approach to the stochastic modelling of reliability systems is further explored. This modelling approach is particularly appropriate for load-sharing, software reliability, and multivariate failure-time models, where component failure characteristics are affected by their degree of use, amount of load, or extent of stresses experienced. This approach incorporates the intuitive notion that when a set of components in a coherent system fail at a certain time, there is a jump from one structure function to another which governs the residual lifetimes of the remaining functioning components, and since the component lifetimes are intrinsically affected by the structure function which they constitute, then at such a failure time there should also be a jump in the stochastic structure of the lifetimes of the remaining components. For such dynamically-modelled systems, the stochastic characteristics of their jump times are studied. These properties of the jump times allow us to obtain the properties of the lifetime of the system. In particular, for a Markov dynamic model, specific expressions for the exact distribution functions of the jump times are obtained for a general coherent system, a parallel system, and a series-parallel system. We derive a new family of distribution functions which describes the distributions of the jump times for a dynamically-modelled system. 相似文献
75.
讨论了多维非退化扩散过程样本轨道的性质,得到了其极性的充分条件 相似文献
76.
A K -sample testing problem is studied for multivariate counting processes with time-dependent frailty. Asymptotic distributions and efficiency of a class of non-parametric test statistics are established for certain local alternatives. The concept of efficiency is to show that for every non-parametric test in this class, there is a parametric submodel for which the optimal test has the same asymptotic power as the non-parametric one. The theory is applied to analyse a diabetic retinopathy study data set. A simulation study is also presented to illustrate the theory 相似文献
77.
Robert Aslett Robert J. Buck Steven G. Duvall Jerome Sacks & William J. Welch 《Journal of the Royal Statistical Society. Series C, Applied statistics》1998,47(1):31-48
In electrical engineering, circuit designs are now often optimized via circuit simulation computer models. Typically, many response variables characterize the circuit's performance. Each response is a function of many input variables, including factors that can be set in the engineering design and noise factors representing manufacturing conditions. We describe a modelling approach which is appropriate for the simulator's deterministic input–output relationships. Non-linearities and interactions are identified without explicit assumptions about the functional form. These models lead to predictors to guide the reduction of the ranges of the designable factors in a sequence of experiments. Ultimately, the predictors are used to optimize the engineering design. We also show how a visualization of the fitted relationships facilitates an understanding of the engineering trade-offs between responses. The example used to demonstrate these methods, the design of a buffer circuit, has multiple targets for the responses, representing different trade-offs between the key performance measures. 相似文献
78.
79.
David A. Buchanan 《Human Relations》1997,50(1):51-72
This paper is concerned with the organizationalchange and project management issues raised by theimplementation of a business process re-engineering(BPR) approach in the politicized hospital context. This is a report of research in progress,focusing on the issues arising at the problem definitionand project planning stages of a BPR application in anoperating theaters department experiencing problems with scheduling and delays. The research designrelies on a case study approach, with the researcher asparticipant observer, as both an adviser to the projectteam and as field interviewer. The paper argues that an ambitious BPR agenda is compromised inat least two regards. First, the lack of precisionsurrounding the focus and methodology of BPR givespolitically motivated actors considerable influence with respect to defining terms of reference in wayswhich will shape potential outcomes in their favor.Second, the complexity and indeterminacy of the businessprocess or patient trail can also diluteredesign attempts. The principal limitations of theapproach thus concern the impracticality of embarking onrapid and radical change working from a blanksheet of paper with respect to organizational and job design. BPR, unlike other organizationdevelopment interventions, is not a contextsensitive approach. The role of project manageris critical in establishing a working balance betweenindividual, occupational, and organizational goals in a manner perceivedto be legitimate in the context. Effective BPR projectmanagement thus requires a combination of political andprocess analysis skills. The principal opportunities of BPR derive from its process orientation,which brings a fresh perspective to a traditionally andfunctionally fragmented organizational setting, andwhich presents a potentially valuable platform for anevolutionary approach to process improvement. 相似文献
80.
Consider the process with, cf. (1.2) on page 265 in B1, X1, …, XN a sample from a distribution F and, for i = 1, …, N, R , the rank of |X1 - q1ø| among |X1 - q1ø|, …, |XN - qNø|. It is shown that, under certain regularity conditions on F and on the constants pi and qi, TøN(t) is asymptotically approximately a linear function of ø uniformly in t and in ø for |ø| ≤ C. The special case where the pi and the qi, are independent of i is considered. 相似文献