二价钴、镍氯化物的四齿N4大环席夫碱配合物的合成及表征

以Cocl_2·6H_2O和NiCl_2·6H_2O为模板剂,邻苯二胺和邻苯二醛为原料,在无水乙醇中模板合成了两种新型的大环席夫碱配合物。通过元素分析、摩尔电导和磁化率的测定,红外光谱、紫外可见光谱等项表征,确定了配合物的组成和结构,进而观察和研究了它们的电致变色现象,并对其电致变色机理进行了初步探讨。     

一类非线性系统的浑沌与次谐波

本文利用Melnikov方法讨论了一类非Hamilton可积方程的周期激励系统,得到了该系统存在浑沌解与次谐波分支的充分条件。     

光学仪器综合封存防护技术研究

本文针对目前光学仪器封存防护中存在的问题,依据光学仪器霉、雾、锈的生成机理,提出一种新型的综合封存技术,并通过试验验证了该技术的可靠性和和对环境的适应性。     

雷达综合灵敏度测试方法研究

本文提出雷达接收微弱信号能力的新拟指标——雷达综合灵敏度。给出其在不解体状态下的测试方法,并对测试误差进行了分析。     

一种基于辩论的协作型CGF分层协商模型

针对作战仿真对人类行为表示(HBR)的准确性要求,建立真实反映战场行为的冲突消解模型是非常重要的.根据已有研究的不足和冲突行为分析,提出了基于辩论的协作型计算机生成兵力(CGF)分层协商模型,在给出相关定义的基础上,研究了冲突下的协商行为过程,实现了基于效用理论的论据强度定量评估算法,算法用于实现首选议题的选取和共同信...     

UNCLOS and maritime security: the “securitisation” of the South China Sea disputes

This Critical Comment seeks to situate the United Nations Convention on the Law of the Sea (UNCLOS) within the context of South China Sea (SCS) dispute. Bearing in mind that maritime actions of the main disputants – China, Vietnam, and the Philippines – increasingly “securitise” these long-standing disputes and vice versa, the study examines the concept of a maritime “regime complex.” Whereas efforts have being made to examine UNCLOS and indeed the dispute within the framework of a maritime “regime complex,” the key finding shows that the increased “securitisation” of the disputes makes it difficult to envisage effective engagement of UNCLOS as a resolution mechanism. It will also reveal that China's firmly established expansionist agenda in the SCS region is indicative of Beijing's susceptibility to compromise a diplomatic solution to these long-standing disputes. These discoveries are structured around the knowledge that the spatial relation of the SCS critically espouses not only its geo-strategic significance in terms of natural resources endowment, but also the enduring maritime disputes within the region.     

NSHT预警装备体系网络化建模与分析

针对NSHT的运动特性和NSHT预警装备网络化趋势,对NSHT情报的分布式碎片化的特点进行了分析,设计了装备体系节点间的信息流向。在此基础上,提出了基于复杂网络理论的NSHT预警装备体系网络模型,并对网络模型的拓扑结构、统计特征等进行了研究,提出了NSHT预警装备体系连接结构的设计建议和应用思路。     

Designing rewards-based crowdfunding campaigns for strategic (but distracted) contributors

In rewards-based crowdfunding, entrepreneurs solicit donations from a large number of individual contributors. If total donations exceed a prespecified funding target, the entrepreneur distributes nonmonetary rewards to contributors; otherwise, their donations are refunded. We study how to design such campaigns when contributors choose not just whether to contribute, but also when to contribute. We show that strategic contribution behavior—when contributors intentionally delay until campaign success is likely—can arise from the combination of nonrefundable (potentially very small) hassle costs and the risk of campaign failure, and can explain pledging patterns commonly observed in crowdfunding. Furthermore, such delays do not hurt the entrepreneur if contributors are perfectly rational, but they do if contributors are distracted, that is, if they might fail to return to the campaign after an intentional delay. To mitigate this, we find that an entrepreneur can use a simple menu of rewards with a fixed number of units sold at a low price, and an unlimited number sold at a higher price; this segments contributors over time based on the information they observe upon arrival. We show that, despite its simplicity, such a menu performs well compared to a theoretically optimal menu consisting of an infinite number of different rewards and price levels under many conditions.     

战时装备维修保障力量抢修行动模型构建与求解

针对战时装备维修保障任务重、修理时间有限以及维修保障力量类型与待修装备损伤需求不匹配,难以实现战场精确保障的问题,进行了战时装备维修保障力量多目标行动控制研究。考虑修理时间窗、装备损伤状态、维修保障力量类型与维修保障能力变化以及非遍历性等复杂约束,构建了以装备重要度总和、修竣装备总和以及超出修理时间窗时间总和为目标的维修保障力量多目标抢修行动控制模型。对带精英策略的非支配排序遗传算法进行改进,结合变邻域搜索算法加强算法的局部搜索能力,设计了改进变邻域搜索和非支配排序遗传算法的混合算法实现模型求解,并通过示例验证了模型及算法的合理性和有效性。     

三维超声速开式空腔振荡特性研究

采用时间3阶、空间5阶的高精度、高分辨率格式,对稳态来流条件下超声速开式空腔的非定常振荡特性进行数值研究。通过二维和三维空腔压力变化、声压级、振荡频率等参数的计算和分析表明:空腔内存在典型的压力振荡,振荡有近似的周期性,且变化规律较复杂,三维空腔对主振荡频率影响较小,但振荡强度有较大的不同。