全文获取类型
收费全文 | 710篇 |
免费 | 240篇 |
国内免费 | 15篇 |
出版年
2024年 | 1篇 |
2023年 | 4篇 |
2022年 | 12篇 |
2021年 | 36篇 |
2020年 | 7篇 |
2019年 | 8篇 |
2018年 | 7篇 |
2017年 | 11篇 |
2016年 | 8篇 |
2015年 | 35篇 |
2014年 | 22篇 |
2013年 | 39篇 |
2012年 | 29篇 |
2011年 | 29篇 |
2010年 | 32篇 |
2009年 | 39篇 |
2008年 | 28篇 |
2007年 | 49篇 |
2006年 | 25篇 |
2005年 | 34篇 |
2004年 | 10篇 |
2003年 | 6篇 |
2002年 | 5篇 |
2001年 | 12篇 |
2000年 | 23篇 |
1999年 | 61篇 |
1998年 | 55篇 |
1997年 | 47篇 |
1996年 | 48篇 |
1995年 | 38篇 |
1994年 | 39篇 |
1993年 | 34篇 |
1992年 | 27篇 |
1991年 | 28篇 |
1990年 | 22篇 |
1989年 | 14篇 |
1988年 | 7篇 |
1987年 | 9篇 |
1986年 | 11篇 |
1985年 | 7篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有965条查询结果,搜索用时 15 毫秒
81.
In many practical manufacturing environments, jobs to be processed can be divided into different families such that a setup is required whenever there is a switch from processing a job of one family to another job of a different family. The time for setup could be sequence independent or sequence dependent. We consider two particular scheduling problems relevant to such situations. In both problems, we are given a set of jobs to be processed on a set of identical parallel machines. The objective of the first problem is to minimize total weighted completion time of jobs, and that of the second problem is to minimize weighted number of tardy jobs. We propose column generation based branch and bound exact solution algorithms for the problems. Computational experiments show that the algorithms are capable of solving both problems of medium size to optimality within reasonable computational time. © 2003 Wiley Periodicals, Inc. Naval Research Logistics 50: 823–840, 2003. 相似文献
82.
This article studies (nQ, r) inventory policies, under which the order quantity is restricted to be an integer multiple of a base lot size Q. Both Q and r are decision variables. Assuming the one-period expected holding and backorder cost function is unimodal, we develop an efficient algorithm to compute the optimal Q and r. The algorithm is facilitated by simple observations about the cost function and by tight upper bounds on the optimal Q. The total number of elementary operations required by the algorithm is linear in these upper bounds. By using the algorithm, we compare the performance of the optimal (nQ, r) policy with that of the optimal (s, S) policy through a numerical study, and our results show that the difference between them is small. Further analysis of the model shows that the cost performance of an (nQ, r) policy is insensitive to the choice of Q. These results establish that (nQ, r) models are potentially useful in many settings where quantized ordering is beneficial. 相似文献
83.
84.
陈岸然 《军队政工理论研究》2006,7(6):53-55
科学人才观是做好人才工作,落实人才强军战略的思想基础。全面理解和践行科学人才观,一要牢固树立人才资源是第一资源、人人都可以成才、以人为本的观念;二要始终坚持党管人才原则,加强各级党委对人才工作的领导;三要构建与科学人才观相适应的军事人才激励机制。 相似文献
85.
Let Yi ∽ N(θi, σ), i = 1, …, p, be independently distributed, where θi and σ are unknown. A Bayesian approach is used to estimate the first two moments of the minimum order statistic, W = min (Y1, …, Yp). In order to compute the Bayes estimates, one has to evaluate the predictive densities of the Yi's conditional on past data. Although the required predictive densities are complicated in form, an efficient algorithm to calculate them has been developed and given in the article. An application of the Bayesian method in a continuous-review control model with multiple suppliers is discussed. © 1994 John Wiley & Sons, Inc. 相似文献
86.
87.
88.
军队思想政治建设实现"三个确保",必须以强化中国特色社会主义理论体系武装为首要任务;以培育当代革命军人核心价值观为重要抓手;以全面提高完成多样化军事任务能力为实践平台;以加强各级党组织建设为关键环节;以改进创新思想政治工作为强大动力. 相似文献
89.
传承“老西藏精神” 培育核心价值观 总被引:3,自引:0,他引:3
宋景原 《军队政工理论研究》2009,10(2)
传承"老西藏精神",培育当代革命军人核心价值观,要在深化"老西藏精神"的认识中提升对当代革命军人核心价值观的认同感;在履行"双重职能"的实践中培育当代革命军人核心价值观;在建设"小康平安和谐西藏"的实践中培育当代革命军人核心价值观;在打造"雪域文化"的实践中培育当代革命军人核心价值观. 相似文献
90.