全文获取类型
收费全文 | 171篇 |
免费 | 48篇 |
国内免费 | 16篇 |
出版年
2024年 | 1篇 |
2023年 | 3篇 |
2022年 | 1篇 |
2021年 | 6篇 |
2020年 | 4篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 7篇 |
2016年 | 6篇 |
2015年 | 6篇 |
2014年 | 22篇 |
2013年 | 19篇 |
2012年 | 22篇 |
2011年 | 22篇 |
2010年 | 14篇 |
2009年 | 17篇 |
2008年 | 15篇 |
2007年 | 15篇 |
2006年 | 11篇 |
2005年 | 6篇 |
2004年 | 5篇 |
2003年 | 7篇 |
2002年 | 2篇 |
2001年 | 6篇 |
2000年 | 3篇 |
1999年 | 5篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1990年 | 1篇 |
排序方式: 共有235条查询结果,搜索用时 0 毫秒
91.
92.
在役立式钢制油罐底圈罐壁可靠性分析 总被引:2,自引:0,他引:2
在役油罐的安全评估通常采用经验评估法,具有较大的盲目性。立式钢油罐强度破坏的重点区域在底圈罐壁,其作用的各变量因素具有较大的随机性,可靠性评价方法较为适用。根据结构可靠性理论推导出底圈罐壁强度失效的计算模型,并进行实例计算分析,为在役油罐的安全评估提供了一种量化的评价方法,具有一定的指导意义和参考价值。 相似文献
93.
Prof Maxi Schoeman Phenyo Keiseng Rakate Lucy Mulli Andrea E Ostheimer 《African Security Review》2013,22(2):122-132
This study examines how young people who have joined the South African National Defence Force (SANDF) on the two-year Military Skills Development System (MSDS) contract experience military service, and the effect this has on their ability to readapt to civilian life. The first part of the study examines the theoretical debates associated with military socialisation and reintegration into civilian life. Hereafter, the findings are presented in terms of the experiences of MSDS privates serving in the infantry, those that have left, and the perceptions of employment agencies in terms of the marketability of military skills. The conclusion is reached that MSDS members experience their two years in the SANDF as life-changing, that this affects their ability to reintegrate back into civilian society, and that the skills acquired during military training is of limited market value. The conclusion is reached that more needs to be done to assist these young military veterans to adapt to civilian life and to augment their military experience with more marketable skills to enable them to find gainful employment. 相似文献
94.
95.
96.
俞莉 《中国人民武装警察部队学院学报》2013,(11):26-29
随着公安警卫部队信息化建设的全面高速发展,云计算技术将更多地应用于警卫信息化建设。展望云计算在警卫信息化建设中的应用前景,分析当前警卫信息化建设中运用云计算技术所面临的问题及对策。 相似文献
97.
This paper considers a discrete time, single item production/inventory system with random period demands. Inventory levels are reviewed periodically and managed using a base‐stock policy. Replenishment orders are placed with the production system which is capacitated in the sense that there is a single server that sequentially processes the items one at a time with stochastic unit processing times. In this setting the variability in demand determines the arrival pattern of production orders at the queue, influencing supply lead times. In addition, the inventory behavior is impacted by the correlation between demand and lead times: a large demand size corresponds to a long lead time, depleting the inventory longer. The contribution of this paper is threefold. First, we present an exact procedure based on matrix‐analytic techniques for computing the replenishment lead time distribution given an arbitrary discrete demand distribution. Second, we numerically characterize the distribution of inventory levels, and various other performance measures such as fill rate, base‐stock levels and optimal safety stocks, taking the correlation between demand and lead times into account. Third, we develop an algorithm to fit the first two moments of the demand and service time distribution to a discrete phase‐type distribution with a minimal number of phases. This provides a practical tool to analyze the effect of demand variability, as measured by its coefficient of variation, on system performance. We also show that our model is more appropriate than some existing models of capacitated systems in discrete time. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007 相似文献
98.
99.
边检执勤执法风险评估是理论研究缺失下的制度实践,为避免出现“形式化”、“走过场”的弊病,亟须对其进行系统反思,并对风险评估制度的基本范畴、合理根基、合法来源、体系构成及目前实践中存在的问题以及改进的空间进行研究,在理论上构建并完善边检执勤执法风险评估制度,以进一步指导和完善边检机关风险评估工作实践。 相似文献
100.
杨波 《中国人民武装警察部队学院学报》2014,(7):65-67
公安现役部队遂行非战争军事行动训练规律,是指客观存在于部队训练诸要素之间的本质的必然联系.其主要包括:任务牵引、理论先导、科技强训、以人为本、训战结合规律.认识部队军事训练规律、遵循军事训练规律,对于加强公安现役部队军事训练工作,提高部队军事训练盾量,不断推动部队军事训练发展,具有重要的现实意义. 相似文献