全文获取类型
收费全文 | 134篇 |
免费 | 38篇 |
国内免费 | 4篇 |
出版年
2021年 | 3篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 3篇 |
2017年 | 4篇 |
2016年 | 2篇 |
2015年 | 5篇 |
2014年 | 9篇 |
2013年 | 4篇 |
2012年 | 2篇 |
2011年 | 4篇 |
2010年 | 7篇 |
2009年 | 12篇 |
2008年 | 3篇 |
2007年 | 9篇 |
2006年 | 3篇 |
2005年 | 6篇 |
2004年 | 4篇 |
2003年 | 2篇 |
2002年 | 5篇 |
2001年 | 7篇 |
2000年 | 4篇 |
1999年 | 17篇 |
1998年 | 9篇 |
1997年 | 10篇 |
1996年 | 11篇 |
1995年 | 4篇 |
1994年 | 5篇 |
1993年 | 3篇 |
1992年 | 5篇 |
1991年 | 1篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 3篇 |
1986年 | 2篇 |
排序方式: 共有176条查询结果,搜索用时 15 毫秒
131.
以 OMRON CPM1 A型 PLC为例 ,介绍了如何用 Visual Basic语言实现计算机与PLC的通讯 .该方案具有硬件简单、使用灵活的特点 .该通讯系统对于用计算机控制 PLC实现集中监控提供了可靠的手段 ;同时为利用计算机进一步开发基于 PLC信息的故障诊断系统诊断信息的获取提供了可靠的渠道 相似文献
132.
Efficient budget allocation strategies for elementary effects method in stochastic simulation
下载免费PDF全文
![点击此处可从《海军后勤学研究》网站下载免费的PDF全文](/ch/ext_images/free.gif)
This paper focuses on extending the Morris' elementary effects method (MM) for sensitivity analysis/factor screening originated in the context of deterministic computer experiments to the stochastic simulation setting. Given a fixed simulation budget to expend, the main objective is to provide efficient and accurate estimates of main and interaction (or nonlinear) effects coined by the standard MM for characterizing the importance of each factor, despite the impact of simulation errors. Taking into account both the factor/input sampling uncertainty rooted in MM and the random errors inherent in a stochastic simulation, we develop efficient budget allocation strategies for implementing MM in this new context. Under each strategy proposed, we derive its corresponding optimal budget partition and optimal budget allocation rules. Numerical results corroborate the practical effectiveness of the proposed budget allocation strategies. 相似文献
133.
谈谈飞行力学的三大研究手段 总被引:1,自引:0,他引:1
基于现代力学思想、信息时代高新技术和以往工作经验 ,对飞行力学的三大研究手段 ,即理论、计算和实验 ,进行了比较详细的讨论。 相似文献
134.
135.
We study an admission control model in revenue management with nonstationary and correlated demands over a finite discrete time horizon. The arrival probabilities are updated by current available information, that is, past customer arrivals and some other exogenous information. We develop a regret‐based framework, which measures the difference in revenue between a clairvoyant optimal policy that has access to all realizations of randomness a priori and a given feasible policy which does not have access to this future information. This regret minimization framework better spells out the trade‐offs of each accept/reject decision. We proceed using the lens of approximation algorithms to devise a conceptually simple regret‐parity policy. We show the proposed policy achieves 2‐approximation of the optimal policy in terms of total regret for a two‐class problem, and then extend our results to a multiclass problem with a fairness constraint. Our goal in this article is to make progress toward understanding the marriage between stochastic regret minimization and approximation algorithms in the realm of revenue management and dynamic resource allocation. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 433–448, 2016 相似文献
136.
红外传感器目标跟踪算法 总被引:8,自引:4,他引:4
对红外传感器目标跟踪进行了系统的阐述 ,包括航迹起始、已知目标强度分布模型时的红外目标跟踪 ,对目标质心伪测量的红外目标跟踪 ,基于质心及质心偏移测量的红外目标跟踪 ,红外传感器的目标机动检测、利用图像分割和目标特征的红外目标跟踪 ,图像相关算法和 Kalman滤波的红外目标跟踪 ,简化充分统计量的红外目标跟踪 ,修正球坐标系 (MSC)的红外目标跟踪、利用主客观知识的红外跟踪 ,红外传感器的微弱信号检测与跟踪以及红外传感器检测 -跟踪的联合优化等研究具有一定的参考意义 相似文献
137.
本文得出了双绝热近似的磁流体力学能量积分关系式。分析表明这种磁流体力学系统是保守的,可以采用运动方程或能量原理方法分析系统的稳定性特性。本文从控制方程组出发讨论了线性稳定性的基本原理,指出纵向压力增值有助于系统的稳定性。 相似文献
138.
分析了通用装备液压油的性能要求,介绍了该油的研制过程、配方、制备工艺及性能。实验室理化性能评定和实际使用结果表明,该油具有比重大、高低温性能优良、防锈润滑性能好等特点,完全可以替代10号航空液压油、炮用液压油、炮用锭子油等10余种液压油在地面通用装备和民用机械设备上的使用,实现了南北方、冬夏季通用,具有广阔的推广应用前景和重大的军事经济效益。 相似文献
139.
This paper considers a three‐person rendezvous problem on the line which was introduced earlier by the authors. Three agents are placed at three consecutive integer value points on the real line, say 1, 2, and 3. Each agent is randomly faced towards the right or left. Agents are blind and have a maximum speed of 1. Their common aim is to gather at a common location as quickly as possible. The main result is the proof that a strategy given by V. Baston is the unique minimax strategy. Baston's strategy ensures a three way rendezvous in time at most 3.5 for any of the 3!23 = 48 possible initial configurations corresponding to positions and directions of each agent. A connection is established between the above rendezvous problem and a search problem of L. Thomas in which two parents search separately to find their lost child and then meet again. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 244–255, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10005 相似文献
140.
We consider acyclic supply chains under the full backorder assumption and reveal several simple yet unique properties. Most interestingly, we identify conditions for the best dedicated stocking policy to outperform the best shared stocking policy, and for an acyclic supply chain to be decomposable into a simpler network (e.g., tree). We specify ways to decompose them. © 2010 Wiley Periodicals, Inc. Naval Research Logistics, 2010 相似文献