全文获取类型
收费全文 | 2031篇 |
免费 | 105篇 |
国内免费 | 4篇 |
专业分类
管理学 | 215篇 |
民族学 | 9篇 |
人口学 | 209篇 |
丛书文集 | 67篇 |
理论方法论 | 72篇 |
综合类 | 241篇 |
社会学 | 119篇 |
统计学 | 1208篇 |
出版年
2023年 | 4篇 |
2022年 | 8篇 |
2021年 | 14篇 |
2020年 | 18篇 |
2019年 | 65篇 |
2018年 | 67篇 |
2017年 | 43篇 |
2016年 | 62篇 |
2015年 | 71篇 |
2014年 | 96篇 |
2013年 | 217篇 |
2012年 | 113篇 |
2011年 | 114篇 |
2010年 | 85篇 |
2009年 | 143篇 |
2008年 | 117篇 |
2007年 | 151篇 |
2006年 | 32篇 |
2005年 | 50篇 |
2004年 | 52篇 |
2003年 | 42篇 |
2002年 | 42篇 |
2001年 | 44篇 |
2000年 | 30篇 |
1999年 | 23篇 |
1998年 | 19篇 |
1997年 | 14篇 |
1996年 | 22篇 |
1995年 | 30篇 |
1994年 | 20篇 |
1993年 | 1篇 |
1992年 | 2篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1986年 | 1篇 |
1985年 | 43篇 |
1984年 | 53篇 |
1983年 | 47篇 |
1982年 | 48篇 |
1981年 | 36篇 |
1980年 | 33篇 |
1979年 | 18篇 |
1978年 | 40篇 |
1977年 | 4篇 |
1976年 | 1篇 |
排序方式: 共有2140条查询结果,搜索用时 15 毫秒
21.
This study proposes a new and highly efficient dynamic combinatorial auction mechanism—the N-bilateral optimized combinatorial auction (N-BOCA). N-BOCA is a flexible iterative combinatorial auction model that offers more optimized trading for multiple suppliers and purchasers in the supply chain than one-sided combinatorial auction. We design the N-BOCA model from the perspectives of market architecture, trading rules, and decision strategy for winner determination, the decision strategy for winner determination needs flexible optimization modeling capability. Thus rule-based reasoning was applied for reflecting the flexible decision strategies. We also show the viability of N-BOCA through Paired Samples T-test experimentation. It shows that N-BOCA yields higher purchase efficiency and effectiveness than the one-auctioneer to multi-bidders (1-to-N) combinatorial auction mechanism. 相似文献
22.
本文在分析J2EE技术特点、中小企业信息化与信息系统建设的意义以及中小企业信息系统的构成内容的基础上,提出了一个基于J2EE的面向竞争的中小企业信息系统开发模式框架结构,并给出了面向竞争的中小企业信息系统建立与完善的若干建议。 相似文献
23.
This paper deals with a single server Poisson arrival queue with two phases of heterogeneous service along with a Bernoulli schedule vacation model, where after two successive phases service the server either goes for a vacation with probability p (0≤p≤1) or may continue to serve the next unit, if any, with probability q(=1−p). Further the concept of multiple vacation policy is also introduced here. We obtained the queue size distributions at a departure epoch and at a random epoch, Laplace Stieltjes Transform of the waiting time distribution and busy period distribution along with some mean performance measures. Finally we discuss some statistical inference related issues. 相似文献
24.
François Bourguignon 《Journal of population economics》1999,12(4):503-521
The collective approach to household consumption behavior tries to infer from variables supposed to affect the general bargaining
position of household members information on the allocation of consumptions goods and tasks among them. This paper investigates
the extension of previous work to the case where children may be considered as a public consumption good by the two adult
members of a household. The main question being asked is whether it is possible to retrieve from the aggregate consumption
behaviour of the household and the relative earnings of the parents information on the allocation of goods between them and
children. This alternative approach to the estimation of the ‘cost of children’ is contrasted with the conventional approach
based on a ‘unitary’ representation of and demographic separability assumptions on household consumption behaviour.
Received: 29 August 1997/Accepted: 26 November 1998 相似文献
25.
鸦片战争期间,中英双方都存在语言沟通的难题.但是,英方由于聘用马儒翰等人担任翻译,有效解决了政治沟通和情报收集等问题.他们充分借助马儒翰等人的中文知识,作出了合理的战略决策和军事安排.而反观中方,林则徐之后的几个主帅,出于怀疑汉人、明哲保身等心理,竟将为数不多的几个译员拒之门外,倚赖英方的马儒翰居中翻译.在缺乏翻译的情况下,清军前线主帅根本无法摸清敌人的真实动向,更无法核对所签条约文本的准确性.结果,清政府不但丧失了战争主动权,也丧失了谈判主动权,造成了很多原本可避免的损失. 相似文献
26.
In analyzing data from unreplicated factorial designs, the half-normal probability plot is commonly used to screen for the ‘vital few’ effects. Recently, many formal methods have been proposed to overcome the subjectivity of this plot. Lawson (1998) (hereafter denoted as LGB) suggested a hybrid method based on the half-normal probability plot, which is a blend of Lenth (1989) and Loh (1992) method. The method consists of fitting a simple least squares line to the inliers, which are determined by the Lenth method. The effects exceeding the prediction limits based on the fitted line are candidates for the vital few effects. To improve the accuracy of partitioning the effects into inliers and outliers, we propose a modified LGB method (hereafter denoted as the Mod_LGB method), in which more outliers can be classified by using both the Carling’s modification of the box plot (Carling, 2000) and Lenth method. If no outlier exists or there is a wide range in the inliers as determined by the Lenth method, more outliers can be found by the Carling method. A simulation study is conducted in unreplicated designs with the number of active effects ranging from 1 to 6 to compare the efficiency of the Lenth method, original LGB methods, and the proposed modified version of the LGB method. 相似文献
27.
28.
Michael Kind 《LABOUR》2015,29(1):79-99
In collective redundancies, employers are forced to regard certain characteristics when deciding who to dismiss. This paper develops a procedure to derive an empirical‐based weighting scheme between protection characteristics in Germany (age, disability, dependencies, and tenure). Up to now, an objective weighting scheme is missing, and employers bargain with employee's representatives about the weighting of the characteristics. In the suggested procedure, the relationships of the four characteristics with reemployment probabilities and the quality of the new job are estimated. Then, the relevant outcome variable is chosen applying life satisfaction analysis. Finally, based on the empirical results, a weighting scheme for the characteristics is proposed, which serves as a guideline in the process of collective redundancies. 相似文献
29.
Franciscos Koutentakis 《LABOUR》2015,29(1):15-31
The paper investigates gender unemployment dynamics in 10 advances economies applying a recent methodology on widely available Labour Force Surveys data. We calculate the job finding and separation rates for each gender and use them to construct the steady‐state unemployment gap as well as two counterfactual gender unemployment gaps: one generated by differences only in job finding rates and the other by differences only in separation rates. We find that in all countries the gender unemployment gap attributed to differences in the job finding rate is lower than the gap attributed to differences in the separation rate, suggesting that gender differences in the separation rate are the major factor behind the gender unemployment gap. 相似文献
30.
Fernando Martins 《LABOUR》2015,29(3):291-309
This paper exploits the information collected from a survey conducted on a sample of Portuguese firms to study the patterns of firms’ price and wage adjustments and the extent of nominal price and wage rigidities. The evidence shows that the frequency of price changes varies substantially across sectors and depends on the intensity of competition, the share of labor costs and firms’ price reviewing behavior. The results also suggest that the constraint imposed by the presence of downward nominal wage rigidity is less important in firms where the fraction of permanent and high‐skilled workers is lower and the share of flexible pay components is higher. 相似文献