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61.
科学技术作为构成战争实力的重要因素,已为越来越多的国家所认识,为保障战争对科学技术的需求,科技动员成为战争动员的重要内容。美国一贯十分重视科学技术力量在战争中的巨大作用,通过采取各种政策措施,有力地推动其科技动员向前发展。 相似文献
62.
This article provides a modeling framework for quantifying cost and optimizing motion plans in combat situations with rapid weapon fire, multiple agents, and attacker uncertainty characterized by uncertain parameters. Recent developments in numerical optimal control enable the efficient computation of numerical solutions for optimization problems with multiple agents, nonlinear dynamics, and a broad class of objectives. This facilitates the application of more realistic, equipment‐based combat models, which track both more realistic models, which track both agent motion and dynamic equipment capabilities. We present such a framework, along with a described algorithm for finding numerical solutions, and a numerical example. 相似文献
63.
Motivated by the flow of products in the iron and steel industry, we study an identical and parallel machine scheduling problem with batch deliveries, where jobs finished on the parallel machines are delivered to customers in batches. Each delivery batch has a capacity and incurs a cost. The objective is to find a coordinated production and delivery schedule that minimizes the total flow time of jobs plus the total delivery cost. This problem is an extension of the problem considered by Hall and Potts, Ann Oper Res 135 (2005) 41–64, who studied a two‐machine problem with an unbounded number of transporters and unbounded delivery capacity. We first provide a dynamic programming algorithm to solve a special case with a given job assignment to the machines. A heuristic algorithm is then presented for the general problem, and its worst‐case performance ratio is analyzed. The computational results show that the heuristic algorithm can generate near‐optimal solutions. Finally, we offer a fully polynomial‐time approximation scheme for a fixed number of machines. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 492–502, 2016 相似文献
64.
Xianpei Hong;Ying-Ju Chen;Yeming Gong;Hua Wang; 《海军后勤学研究》2024,71(2):286-317
While the previous literature on green technology adoption has not fully considered information sharing, we consider the impact of demand information sharing on the adoption of green technologies by risk-averse farmers in a vertical agricultural supply chain. We find that government subsidies and information sharing do not always promote farmers' adoption of green technologies. The accuracy of the information plays a vital role in promoting farmers' adoption of green technologies; however, the increased green technology adoption induced by more accurate information may be detrimental to farmer welfare in the presence of production diseconomies. Information sharing can reduce the amount of government subsidies for promoting green technology adoption, thereby suggesting the substitutable role of information and monetary instruments. Nonetheless, information-sharing may lead to lower water savings and thus should be adopted with caution. Risk aversion has a nontrivial impact on agricultural technology adoption: farmers are more likely to adopt traditional agricultural technologies when their risk aversion is either very low or very high. Finally, we validate our decision model with U.S. Department of Agriculture cotton production data and propose management insights to help farmers make appropriate adoption decisions under information asymmetry and risk-averse attitudes. 相似文献
65.
本文用氧吸附法和程序升温脱附（ＴＰＤ）法分别考察低Ｎｉ／改性Ａｌ２Ｏ３催化剂的分散度,环已烷和苯的吸附脱附性能。结果表明：该催化剂分散性好,表面至少存在两种吸附中心。苯、环已烷在该催化剂的表面上属于一级可逆吸附脱附过程,催化剂表面能量分布不均匀。 相似文献
66.
气相苯加氢低Ni/改性Al2O3催化剂性能评价 总被引：1，自引：0，他引：1
通过对γ－Ａｌ２Ｏ３载体进行化学改性处理,把Ｎｉ的含量降低（在５％以内）制得气相苯加氢低Ｎｉ／改性Ａｌ２Ｏ３催化剂。考察反应条件对其催化活性影响,并对催化剂的活性稳定性、耐热性、抗毒物能力进行评价。结果表明：该催化剂的性能良好 相似文献
67.
在浅水条件下,采用船舶水动力学理论,导出了一个包含色散效应的船舶水压场控制方程.通过求解,得到了考虑色散效应的船舶水压场计算公式,计算结果反映了实际船舶水压场的变化规律. 相似文献
68.
69.
在举世瞩目的淮海战役中,华东、中原野战军在543万人民群众及地方武装支援下,与南线国民党军主力浴血奋战66天,以伤亡13.6万人的代价,取得歼敌55.5万余人的伟大胜利,基本上解放了长江以北的华东、中原地区,使国民党政府首都南京处于人民解放军的直接威胁之下,蒋介石22年的反动统治陷入土崩瓦解的境地. 相似文献
70.
贡沈平 《军队政工理论研究》2011,12(1)
推进马克思主义中国化时代化大众化,是我党对发展马克思主义的新认识和新要求.科学化是推进马克思主义中国化时代化大众化的关键.必须在坚持实事求是的精神、以人为本的价值取向、与时俱进的科学品质中发展马克思主义. 相似文献