全文获取类型
收费全文 | 8545篇 |
免费 | 256篇 |
国内免费 | 59篇 |
专业分类
管理学 | 626篇 |
民族学 | 7篇 |
人口学 | 66篇 |
丛书文集 | 373篇 |
理论方法论 | 84篇 |
综合类 | 4102篇 |
社会学 | 125篇 |
统计学 | 3477篇 |
出版年
2024年 | 7篇 |
2023年 | 51篇 |
2022年 | 76篇 |
2021年 | 76篇 |
2020年 | 146篇 |
2019年 | 210篇 |
2018年 | 221篇 |
2017年 | 334篇 |
2016年 | 216篇 |
2015年 | 162篇 |
2014年 | 338篇 |
2013年 | 1401篇 |
2012年 | 633篇 |
2011年 | 389篇 |
2010年 | 414篇 |
2009年 | 381篇 |
2008年 | 409篇 |
2007年 | 434篇 |
2006年 | 495篇 |
2005年 | 447篇 |
2004年 | 371篇 |
2003年 | 362篇 |
2002年 | 317篇 |
2001年 | 271篇 |
2000年 | 163篇 |
1999年 | 109篇 |
1998年 | 83篇 |
1997年 | 59篇 |
1996年 | 35篇 |
1995年 | 24篇 |
1994年 | 37篇 |
1993年 | 22篇 |
1992年 | 27篇 |
1991年 | 9篇 |
1990年 | 20篇 |
1989年 | 14篇 |
1988年 | 20篇 |
1987年 | 9篇 |
1986年 | 8篇 |
1985年 | 4篇 |
1984年 | 12篇 |
1983年 | 14篇 |
1982年 | 8篇 |
1981年 | 5篇 |
1980年 | 1篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1977年 | 2篇 |
1975年 | 2篇 |
1973年 | 1篇 |
排序方式: 共有8860条查询结果,搜索用时 15 毫秒
41.
物流成本对国际贸易影响的实证分析 总被引:1,自引:0,他引:1
刘金钵 《河北理工大学学报(社会科学版)》2003,3(4):82-84
多年来中美贸易发展迅速 ,美国成为我国主要出口国家。当今形势下 ,物流成本成为影响中美贸易的主要因素 ;借助计量经济学方法 ,定量地探讨了物流成本对两国贸易尤其是我国出口贸易的影响。 相似文献
42.
The Research Institute of Foshan Social Economic Development Foshan University 《佛山科学技术学院学报(社会科学版)》1992,(1)
本文把佛山市场营销作为系统工程来研究。主要论述三个问题:佛山市场划分系统、营销运行系统和营销策略及其系统效应。 相似文献
43.
In the development of many diseases there are often associated random variables which continuously reflect the progress of a subject towards the final expression of the disease (failure). At any given time these processes, which we call stochastic covariates, may provide information about the current hazard and the remaining time to failure. Likewise, in situations when the specific times of key prior events are not known, such as the time of onset of an occult tumour or the time of infection with HIV-1, it may be possible to identify a stochastic covariate which reveals, indirectly, when the event of interest occurred. The analysis of carcinogenicity trials which involve occult tumours is usually based on the time of death or sacrifice and an indicator of tumour presence for each animal in the experiment. However, the size of an occult tumour observed at the endpoint represents data concerning tumour development which may convey additional information concerning both the tumour incidence rate and the rate of death to which tumour-bearing animals are subject. We develop a stochastic model for tumour growth and suggest different ways in which the effect of this growth on the hazard of failure might be modelled. Using a combined model for tumour growth and additive competing risks of death, we show that if this tumour size information is used, assumptions concerning tumour lethality, the context of observation or multiple sacrifice times are no longer necessary in order to estimate the tumour incidence rate. Parametric estimation based on the method of maximum likelihood is outlined and is applied to simulated data from the combined model. The results of this limited study confirm that use of the stochastic covariate tumour size results in more precise estimation of the incidence rate for occult tumours. 相似文献
44.
W. Stute 《Journal of statistical planning and inference》1992,30(3):293-305
We propose a new modified (biased) cross-validation method for adaptively determining the bandwidth in a nonparametric density estimation setup. It is shown that the method provides consistent minimizers. Some simulation results are reported on which compare the small sample behavior of the new and the classical cross-validation selectors. 相似文献
45.
段康廉 《太原理工大学学报(社会科学版)》2002,20(1):9-12
介绍了国内外地下工程开发的现状与未来 ,论述了地下工程专业人才的需求 ,对地下工程专业人才的培养提出了建议 ,可供有关领导决策时参考 相似文献
46.
This study examines housing quality among three groups of single-parent women: white, African-American, and Hispanic. Three
indicators of housing quality—crowding, affordability, and satisfaction—are used to discover the extent to which these groups
experience housing problems. This study also explores differences and similarities in the factors that precipitate problems
in housing quality for these three groups of single parents. Findings suggest important differences and similarities in the
nature of housing quality problems among white, African-American, and Hispanic single-parent women. The specified variables
explained about 20% of the variance in crowding, housing affordability, and housing satisfaction. On measures of objective
and subjective housing quality, white single mothers are better housed than their African-American or Hispanic counterparts.
Hispanic single mothers have the largest housing cost burden and average more persons per household than the other groups.
African-Americans are twice as likely as either group to live in low-quality housing and reported the lowest average satisfaction
with their housing.
Her research interests include housing and neighborhood assessment and women and public policy issues. She has recently published
articles inUrban Affairs Quarterly andHousing and Society on housing and neighborhood assessment criteria among black urban households and the housing cost burden of various groups
of female-headed households. She received her Ph.D. from Ohio State University.
Her research interests include the housing adjustment behavior of women and public policy. She has recently completed her
thesis on the role of noncustodial parents in determining the quality of life of their children. She is also the recipient
of the Tessie Agan Award for research excellence from the American Association of Housing Educators for a paper titled “Unterstanding
Constraints and Residential Satisfaction among Low-Income Single-Parent Families.” 相似文献
47.
供应链管理模式下的企业外包设计研究 总被引:3,自引:0,他引:3
供应链管理是近年来在国内外逐渐受到重视的一种新的管理理念与模式,其管理思想是使企业将主要精力放在核心业务上,充分发挥优势,企业中的非核心业务外包给合作企业来完成。因此,企业外包设计成为供应链管理思想的一个重要方面。基于这一背景,首先探讨了企业外包的含义及其构成元素;并根据威廉姆森的新制度经济学中经济业务交易的规制结构对企业外包的规制层次进行划分;最后,构建了在供应链管理模式下基于交易成本和核心竞争力相结合的企业外包设计模型。 相似文献
48.
Chris Dockins Robin R Jenkins Nicole Owens Nathalie B Simon Lanelle Bembenek Wiggins 《Risk analysis》2002,22(2):335-346
This article explores two problems analysts face in determining how to estimate values for children's health and safety risk reductions. The first addresses the question: Do willingness‐to‐pay estimates for health risk changes differ across children and adults and, if so, how? To answer this question, the article first examines the potential effects of age and risk preferences on willingness to pay. A summary of the literature reporting empirical evidence of differences between willingness to pay for adult health and safety risk reductions and willingness to pay for health and safety risk reductions in children is also provided. The second dimension of the problem is a more fundamental issue: Whose perspective is relevant when valuing children's health effects—society's, children's, adults‐as‐children, or parents'? Each perspective is considered, followed ultimately by the conclusion that adopting a parental perspective through an intrahousehold allocation model seems closest to meeting the needs of the estimation problem at hand. A policy example in which the choice of perspective affects the outcome of a regulatory benefit‐cost analysis rounds out the article and emphasizes the importance of perspective. 相似文献
49.
潘红梅 《盐城师范学院学报》2005,25(3):44-47
我国作为一个经济发展势头强劲的国家,改善投资环境,增强投资环境的吸引力十分重要。商务成本是投资环境重要的组成部分。本文着重阐述了商务成本的内涵、影响因素及降低商务成本的主要途径。 相似文献
50.
简论晚清新式企业内部管理的若干改革主张 总被引:2,自引:0,他引:2
严亚明 《西北民族大学学报》2005,3(5):46-52
晚清时期,人们通过对西方企业管理活动的考察,反思了各类新式企业实践活动中的诸多管理弊端,提出了许多改善企业内部管理的主张,这些改革建议涉及到企业的各个方面,诸如人事管理、财产物质管理、成本费用管理、市场营销与资金管理等。 相似文献