全文获取类型
收费全文 | 391篇 |
免费 | 84篇 |
国内免费 | 14篇 |
出版年
2022年 | 2篇 |
2021年 | 15篇 |
2020年 | 4篇 |
2019年 | 2篇 |
2018年 | 4篇 |
2017年 | 10篇 |
2016年 | 3篇 |
2015年 | 11篇 |
2014年 | 32篇 |
2013年 | 16篇 |
2012年 | 9篇 |
2011年 | 10篇 |
2010年 | 24篇 |
2009年 | 31篇 |
2008年 | 18篇 |
2007年 | 28篇 |
2006年 | 14篇 |
2005年 | 20篇 |
2004年 | 8篇 |
2003年 | 4篇 |
2002年 | 6篇 |
2001年 | 14篇 |
2000年 | 10篇 |
1999年 | 36篇 |
1998年 | 21篇 |
1997年 | 22篇 |
1996年 | 29篇 |
1995年 | 16篇 |
1994年 | 11篇 |
1993年 | 11篇 |
1992年 | 13篇 |
1991年 | 7篇 |
1990年 | 9篇 |
1989年 | 3篇 |
1988年 | 4篇 |
1987年 | 3篇 |
1986年 | 6篇 |
1985年 | 1篇 |
1983年 | 2篇 |
排序方式: 共有489条查询结果,搜索用时 15 毫秒
31.
32.
我国高新武器装备陆续列装到基层部队,随着训练的展开,暴露出科研设计阶段没有考虑到的一些小的设计问题,本文列举了三种设计遗留问题,分别予以解释、分析,希望在以后的武器装备设计过程中得到体现。 相似文献
33.
针对传统优化方法不能对武器装备使用主体――部队的使用需求进行有效考虑,提出武器装备使用需求到性能指标映射的串联QFD神经网络方法.该方法综合利用了QFD方法采集信息准确快速、神经网络能够精确模拟多变量输入输出强非线性关系的优点,提高了映射精度与针对性,克服了传统需求分析侧重于推理而轻实践、侧重于"设计方"而轻"使用方"的弊端,集中体现了"用户"为主的思想.改进了传统BP网络训练算法,给出了武器装备使用需求映射适应度函数.最后,结合实例对方法及算法进行了可靠性验证. 相似文献
34.
35.
中国抗日战争时期,苏联政府根据<中苏互不侵犯条约>,向中国政府以贷款的方式提供飞机等抗战急需的武器.本文以图文并茂的形式,对抗战期间苏联援华飞机的数量、机型及其在对日本空军作战中表现出的特点等作了探讨. 相似文献
36.
1943年秋日军发动鲁西细菌战述评 总被引:2,自引:0,他引:2
1943年8月下旬至10月下旬,在整个世界反法西斯战争节节胜利的大背景下,日本华北方面军第12军在以馆陶、临清为中心的鲁西、冀南地区实施了大规模的霍乱细菌战,以较小的代价给中国抗日军民造成重大杀伤。此次细菌战同以往日军进行的历次细菌战相比,有其发生的特殊原因,具备许多鲜明的特点,对日军以后的细菌战决策产生了重大影响。 相似文献
37.
38.
Considering a supply chain with a supplier subject to yield uncertainty selling to a retailer facing stochastic demand, we find that commonly studied classical coordination contracts fail to coordinate both the supplier's production and the retailer's procurement decisions and achieve efficient performance. First, we study the vendor managed inventory (VMI) partnership. We find that a consignment VMI partnership coupled with a production cost subsidy achieves perfect coordination and a win‐win outcome; it is simple to implement and arbitrarily allocates total channel profit. The production cost subsidy optimally chosen through Nash bargaining analysis depends on the bargaining power of the supplier and the retailer. Further, motivated by the practice that sometimes the retailer and the supplier can arrange a “late order,” we also analyze the behavior of an advance‐purchase discount (APD) contract. We find that an APD with a revenue sharing contract can efficiently coordinate the supply chain as well as achieve flexible profit allocation. Finally, we explore which coordination contract works better for the supplier vs. the retailer. It is interesting to observe that Nash bargaining solutions for the two coordination contracts are equivalent. We further provide recommendations on the applications of these contracts. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 305–319, 2016 相似文献
39.
40.
With the help of the Internet and express delivery at relatively low costs, trading markets have become increasingly popular as a venue to sell excess inventory and a source to obtain products at lower prices. In this article, we study the operational decisions in the presence of a trading market in a periodic‐review, finite‐horizon setting. Prices in the trading market change periodically and are determined endogenously by the demand and supply in the market. We characterize the retailers'optimal ordering and trading policies when the original manufacturer and the trading market co‐exist and retailers face fees to participate in the trading market. Comparing with the case with no trading fees, we obtain insights into the impact of trading fees and the fee structure on the retailers and the manufacturer. Further, we find that by continually staying in the market, the manufacturer may use her pricing strategies to counter‐balance the negative impact of the trading market on her profit. Finally, we extend the model to the case when retailers dynamically update their demand distribution based on demand observations in previous periods. A numerical study provides additional insights into the impact of demand updating in a trading market with the manufacturer's competition. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2010 相似文献