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21.
Market failures, government failures and some of the characteristics of both the poor and business actors as well as their environment can act as barriers preventing the poor from participating more actively in markets, both as consumers and as producers. Private actors ‐ including for‐profit and not‐for‐profit entities, often in partnership with the public sector ‐ have been able to mitigate some of these constraints through innovations that have helped to make markets more inclusive for the poor, enabling them not just to gain access, but also to participate in ways that enhance their economic empowerment and human development. This article identifies the strategies and innovations used and devises a possible typology for them.  相似文献   
22.
It is known that the normal approximation is applicable for sums of non negative random variables, W, with the commonly employed couplings. In this work, we use the Stein’s method to obtain a general theorem of non uniform exponential bound on normal approximation base on monotone size bias couplings of W. Applications of the main result to give the bound on normal approximation for binomial random variable, the number of bulbs on at the terminal time in the lightbulb process, and the number of m runs are also provided.  相似文献   
23.
文本首先比较了我国与全球领先制药公司研究开发的差距。作者认为 ,我国制药业在资源投入上难以与他们抗衡。但从日本制药公司及西方成功制药公司的经验来看 ,我国制药业可以通过加强创新管理来弥补其不足 ,获得应有的竞争优势  相似文献   
24.
In Brazil unlike France two very split labour markets co-exist, the formal and the informal. On the formal labor market in Brazil, union rights prevail, and wage-earners are protected unlike in the informal labor market where none of this exists. Raising industry to an international level pushed many wage-earners out of the formal sector during the 1980s. Did they find jobs elsewhere? If so, in which branches of the economy? To provide answers, two files are crossed, their data having been made longitudinal. Dismissed workers’ trajectories from 1989 till 1995 in two branches and two regions are analyzed: the automobile industry in the São Paulo area and the petrochemical industry in the São Salvador (Bahia) area. These career trajectories shed light on how modernization has affected quite different labor markets; it also brings to the foreground the concept of a systemic restructuring of the labor market. — Special issue: Latin America.  相似文献   
25.
Previous research finds a positive relationship between a wife’s education and her husband’s earnings using data from the 1960s. Earlier theories suggest that benefits accrue from informational sharing between partners in a marriage. This paper tests the hypothesis that a wife’s education is positively associated with her husband’s earnings, using data from the 1960, 1970, 1980, 1990, and 2000 Censuses. Between 1960 and 2000, the educational attainment and labor-force participation of married women has increased dramatically. As women have embarked upon their own careers, has their education continued to be positively associated with their husbands’ earnings? Yes. The coefficient of the wife’s education remains positive and significant for all the years under study. The size of the coefficient decreases, however, from 1960 to 2000.  相似文献   
26.
We study the nonparametric maximum-likelihood estimator of the marginal distribution function in bivariate data with truncated sum (Woodroofe 1985), and calculate the probability that it will assign zero probability to a range of observed values. We show that in a simple artificial model with uniform intensity in both variables the probability may be expressed using recursive formulae, and that large-sample approximations valid under weak regularity conditions show good agreement with as few as 20 observations. In the uniform-intensity model, the probability of degenerate estimates is rather small, being just over 5% with a dataset of 20 observations and falling below 1% with 125 observations. However, in a model of transfusion-associated AIDS in 125 children and adults (Kalbfleisch and Lawless 1989), the probability of degenerate estimates is much larger—about 30% with 20 observations and 3% with the actual 125 observations. This is largely because both the infection and incubation density are increasing over time. Such a pattern makes the condition for degeneracy, i.e., relatively high observed intensity at extreme values of each variable, much more likely.  相似文献   
27.
I counterexample is presented to the result by Alam and Malleolus asserting that if Y is stochastically increasing in a random vector X, then Y is stochastically increasing in a subvector of X. Their result concerning m*-positive dependence, whose proof relies on the erroneous result, is still true.  相似文献   
28.
杰拉德·热奈特的类文本理论受到中西方学界的关注与重视,一些学者对该理论进行了一定的补充和修正工作,也有不少学者将其用于文学研究。类文本理论视阈下,文学研究的对象为环绕于文本边缘的类文本要素,如作者的署名、序言、献词、题记、版权页信息等。将作者重新纳入批评视野,类文本理论有效修正了文本理论将文本与作者相割裂的不当做法;将出版商引入批评框架,类文本理论不仅拓展了传统文学批评体系,还起到限制读者过度阐释的目的。同时,类文本理论促进了叙事学的进一步发展,使文学研究从文本中心走向文本边缘,并将文学的内部研究和外部研究相结合,从而推进了文学批评理论的发展。鉴于类文本与文本的互存关系,某些类文本和文本之间的界限模糊不清,它们在具备类文本属性的同时,又不乏文本的属性,而这一特性又恰恰佐证了类文本之于文本而存续的重要性。  相似文献   
29.
古兰学(‘Ulūmal-qur’ān)是研究《古兰经》的基础学科,也是伊斯兰文化体系的传统学科。尽管古兰学是一门独立学科,但它因以《古兰经》为研究对象而具有多学科交叉特点,并由此产生了若干分支学科,经注学(‘ilmal-tafsir)则是其中最重要的主干学科。古兰学与经注学在学科原理和认知经文层面的共性关系,既有助于人们了解和理解《古兰经》的文体经义,也为伊斯兰文化发展提供不可或缺的思想资源。  相似文献   
30.
基于MA S 的群决策支持系统研究   总被引:7,自引:0,他引:7  
群决策支持系统(GDSS) 与传统的决策支持系统(DSS) 在体系结构和工作方式上有着较 大的差异. 在网络环境中, 组织的决策需要一种开放的GDSS 体系结构和协作的工作方式. 本 文提出一种基于MA S 的GDSS 体系结构, 以及在这种体系结构下的协同决策的模型. 在此基 础上开发了一个GDSS 的原型系统, 并对今后的研究方向进行了展望.  相似文献   
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