全文获取类型
收费全文 | 18365篇 |
免费 | 188篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2587篇 |
民族学 | 147篇 |
人口学 | 3054篇 |
丛书文集 | 23篇 |
理论方法论 | 1134篇 |
综合类 | 359篇 |
社会学 | 7736篇 |
统计学 | 3514篇 |
出版年
2023年 | 49篇 |
2022年 | 29篇 |
2021年 | 56篇 |
2020年 | 127篇 |
2019年 | 192篇 |
2018年 | 1851篇 |
2017年 | 1960篇 |
2016年 | 1277篇 |
2015年 | 168篇 |
2014年 | 247篇 |
2013年 | 1604篇 |
2012年 | 554篇 |
2011年 | 1373篇 |
2010年 | 1232篇 |
2009年 | 987篇 |
2008年 | 1017篇 |
2007年 | 1171篇 |
2006年 | 194篇 |
2005年 | 413篇 |
2004年 | 402篇 |
2003年 | 352篇 |
2002年 | 261篇 |
2001年 | 211篇 |
2000年 | 213篇 |
1999年 | 196篇 |
1998年 | 139篇 |
1997年 | 127篇 |
1996年 | 138篇 |
1995年 | 96篇 |
1994年 | 137篇 |
1993年 | 97篇 |
1992年 | 127篇 |
1991年 | 132篇 |
1990年 | 116篇 |
1989年 | 104篇 |
1988年 | 101篇 |
1987年 | 91篇 |
1986年 | 90篇 |
1985年 | 89篇 |
1984年 | 93篇 |
1983年 | 69篇 |
1982年 | 79篇 |
1981年 | 51篇 |
1980年 | 64篇 |
1979年 | 63篇 |
1978年 | 51篇 |
1977年 | 52篇 |
1976年 | 39篇 |
1975年 | 48篇 |
1974年 | 40篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
221.
S. K. Gaisie 《Demography》1975,12(1):21-34
This paper attempts to measure infant and child mortality levels and also to determine their structure by utilizing the results of the 1968–1969 National Demographic Sample Survey which was conducted under the directorship of the author. Among the major problems encountered in the exercise are the adjustment of the current raw mortality data and the estimation of infant and child mortality from independent source material. The estimated infant mortality rates range from 56 per 1,000 live births in the Accra Capital District to 192 in the Upper Region during the late 1960’s. The urban rate is lower than the rural rate, 98 as against 161 per 1,000 live births. A large proportion of the deaths among children aged 0–4 occur in the second year of life, and deaths in this age group account for the bulk of the deaths within the age group 1–4 years. 相似文献
222.
223.
In the binary single constraint Knapsack Problem, denoted KP, we are given a knapsack of fixed capacity c and a set of n items. Each item j, j = 1,...,n, has an associated size or weight wj and a profit pj. The goal is to determine whether or not item j, j = 1,...,n, should be included in the knapsack. The objective is to maximize the total profit without exceeding the capacity c of the knapsack. In this paper, we study the sensitivity of the optimum of the KP to perturbations of either the profit or the weight of an item. We give approximate and exact interval limits for both cases
(profit and weight) and propose several polynomial time algorithms able to reach these interval limits. The performance of
the proposed algorithms are evaluated on a large number of problem instances. 相似文献
224.
Ohne Zusammenfassung 相似文献
225.
Astrid Schreyögg 《Organisationsberatung, Supervision, Coaching》2005,12(4):397-402
Dual Career Couples as a form of work-life-integrationThe author discusses the situation of dual career couples, when both are university graduates following an own career. Basing on a respective publication she delineates the current, mostly American research and reports on several German research projects, which endeavour to analyse the relation between gender and inequality in dual career couples. 相似文献
226.
Harald Pühl 《Organisationsberatung, Supervision, Coaching》2005,12(3):245-252
From supervision to mediation and vice versaMediation in organizations becomes more and more important because of increasing conflicts. The question is, which competencies of the counsellor are necessary, and above all, whether mediation is a particular method. The author explains the method of mediation and illustrates his concept of “patchwork-mediation”. This procedure allows to build a bridge between supervision and mediation. 相似文献
227.
Harald Pühl 《Organisationsberatung, Supervision, Coaching》2003,10(3):293-295
Ohne Zusammenfassung 相似文献
228.
The objective of this study was to determine the impact of task information (TI) provided by an interface agent during the idea evaluation and integration step of the problem formulation stage of the problem solving process. The effectiveness assessment was based on solving diagnostic decision problems in the domain of complex industrial machinery. Ten domain experts participated in this study. Decision support was provided by a case-based reasoning system. Findings suggest that TI provided by the interface agent had no effect on the decision maker's performance, nor on the associated cognitive effort. However, a verbal protocol analysis revealed that the ten subjects used the interface agent to verify their decision processes. The results and their implications are discussed with respect to current findings in the area of decision support systems. 相似文献
229.
F. H. Chang H. B. Chen J. Y. Guo F. K. Hwang Uriel G. Rothblum 《Journal of Combinatorial Optimization》2006,11(3):321-339
Consider the problem of partitioning n nonnegative numbers into p parts, where part i can be assigned ni numbers with ni lying in a given range. The goal is to maximize a Schur convex function F whose ith argument is the sum of numbers assigned to part i.
The shape of a partition is the vector consisting of the sizes of its parts, further, a shape (without referring to a particular
partition) is a vector of nonnegative integers (n1,..., np) which sum to n. A partition is called size-consecutive if there is a ranking of the parts which is consistent with their sizes, and all
elements in a higher-ranked part exceed all elements in the lower-ranked part. We demonstrate that one can restrict attention
to size-consecutive partitions with shapes that are nonmajorized, we study these shapes, bound their numbers and develop algorithms
to enumerate them. Our study extends the analysis of a previous paper by Hwang and Rothblum which discussed the above problem
assuming the existence of a majorizing shape.
This research is partially supported by ROC National Science grant NSC 92-2115-M-009-014. 相似文献
230.