飞控系统风洞虚拟飞行试验评估指标与评估要求

为明确风洞虚拟飞行试验能够评估的飞控系统性能,并为风洞虚拟飞行试验评估方法设计做出铺垫,针对风洞虚拟飞行试验特点,提出了风洞虚拟飞行试验能够评估的飞行性能指标及飞行品质指标,比较了风洞虚拟飞行试验与半实物仿真和飞行试验的评估能力差异;仿真分析了风洞虚拟飞行试验特点会造成的风洞虚拟飞行试验与自由飞行的评估结果差异;从试验、数据处理、性能评定等方面,提出了评估这些指标对风洞虚拟飞行试验评估方法的具体要求,并比较了它与半实物仿真和飞行试验的评估要求差异。     

天基预警系统多体制传感器综合调度方法

为提高天基预警系统对多目标的跟踪能力,提出扫描传感器纬度区间扫描模式和凝视传感器目标群跟踪模式,并基于此种模式设计基于聚类的扫描传感器纬度区间扫描调度方法和凝视相机目标群跟踪调度方法。由于诸多传感器的工作模式、探测频率、测量误差、视场模型均不相同,推导不同探测频率、视线误差的多传感器联合观测跟踪的克拉美-罗下界计算公式。综合运用以上方法,建立多体制传感器综合调度优化方法。仿真试验表明,该方法比传统工作模式下的系统对多目标具有更高的跟踪精度。     

From management crisis to crisis management? Japan’s post-2012 institutional reforms and Sino-Japanese crisis (In)stability

Since 2012, China’s assertion of its sovereignty claim to the contested Senkaku/Diaoyu Islands has significantly raised the risk of a potentially escalatory political-military crisis with Japan. As circumstances worsen, Japanese Prime Minister Shinzo Abe has championed major institutional reforms aimed at centralizing Japanese security policy decision-making and vastly improving crisis management. This article assesses these reforms’ significance for ameliorating Japan’s long-standing internal crisis management weaknesses, and enhancing its ability to communicate with Beijing promptly under challenging conditions. While significant issues remain, recent developments – especially the establishment of Japan’s first-ever National Security Council – demonstrate significant progress. Bilaterally, however, important firebreaks remain conspicuously absent.     

Transit vessel scheduling

A transit vessel traffic scheduling algorithm has been developed to limit the negative effects on cargo volume throughput in two‐way waterways where separation distances between transiting vessels must be maintained and passage restrictions may hold. It runs in time that is polynomial in the number of ships involved in the computation and finds schedules which increase the utilization of waterways. Three examples illustrate its use. The first example is situated in the Sunda Strait where the algorithm is used to enhance the safety of merchant shipping against a terrorist threat. It illustrates important features of the algorithm and demonstrates how it can be used with cross traffic. The second example is situated in the Strait of Istanbul and offers a comparison between the developed algorithm and the transit vessel scheduling algorithm of Ulusçu et al., J Navig 62 (2009), 59–77. This was done using a plausible model of the Strait of Istanbul. The third and last example shows how the algorithm can be used to schedule transit vessel traffic in two‐way waterways with junctions. This feature is especially useful in congested waters with a high risk of collisions like the Inland Sea of Japan. An extreme test case proves that the developed algorithm is a practical algorithm ready for such use. © 2017 Wiley Periodicals, Inc. Naval Research Logistics 64: 225–248, 2017     

Optimal division of inventory between depot and bases

We consider a problem of optimal division of stock between a logistic depot and several geographically dispersed bases, in a two‐echelon supply chain. The objective is to minimize the total cost of inventory shipment, taking into account direct shipments between the depot and the bases, and lateral transshipments between bases. We prove the convexity of the objective function and suggest a procedure for identifying the optimal solution. Small‐dimensional cases, as well as a limit case in which the number of bases tends to infinity, are solved analytically for arbitrary distributions of demand. For a general case, an approximation is suggested. We show that, in many practical cases, partial pooling is the best strategy, and large proportions of the inventory should be kept at the bases rather than at the depot. The analytical and numerical examples show that complete pooling is obtained only as a limit case in which the transshipment cost tends to infinity. © 2017 Wiley Periodicals, Inc. Naval Research Logistics, 64: 3–18, 2017     

Performance analysis of the cultural and creative industry: a network‐based approach

The cultural and creative industries (CCIs) in Taiwan have gradually contributed to the national economy under the impetus of government policies. We employ a two‐stage data envelopment analysis model with an additive efficiency decomposition approach to measure the profitability and marketability of 22 Taiwanese cultural and creative companies. Furthermore, we employ the network‐based ranking approach to identify benchmark inputs/outputs, and the strengths and weakness of each company. Our empirical results show that the profitability of the cultural and creative companies is better than their marketability. Companies in the industries of publishing, creative life, popular music, and cultural content averagely perform better than those in the other three types of CCIs in terms of profitability. Companies in the creative life industry are on average more efficient than those in the other five types of CCIs in terms of marketability. The profitability/marketability matrix of cultural and creative companies is also presented.     

美军陆战场空域管理体系研究

陆战场空域已经成为一种重要的作战资源,对其进行科学高效的管理十分必要。分析了陆战场空域管理的特点,总结了陆战场空域管理的职能,从条令条例建设、空域管制方法和指挥体系结构等方面对美军陆战场空域管理进行了研究。     

光电探测系统电源通用化设计与实现

为应对全天候、全天时实时使用要求,光电探测系统逐渐从功能单一的光电探测系统演变为多功能、多传感器的综合光电系统。因此,具体进行工程设计时,系统电源组件的技术指标要合理,满足系统使用要求。同时,组件维修、故障诊断、部件互换也要容易。针对此问题,基于描述的光电探测系统电源通用化设计原则,提出了一种可工程化设计方案。该方案对电源硬件结构设置、电源控制管理和电源功能扩展设计等进行了讨论,并给出具体设计方法。通过实际应用验证表明,该方案能够满足系统对电源组件的要求。     

Israel’s relations with the Gulf states: Toward the emergence of a tacit security regime?

By drawing on the literature about security regimes, this article posits the idea that a particular type of regime, which can be termed a “tacit security regime” (TSR), has begun to emerge between Israel, on the one hand, and several Gulf Arab states, on the other. It is a regime which, unlike liberal institutional variants that attempt to privilege the promotion of collective norms, remains configured around perceptions of threats to be countered and strategic interests to be realized. By examining the development, scope, and scale of this nascent TSR, this article explores the extent to which Israel, mindful of Washington, DC’s regional retrenchment, sees the emergence of such a regime as redefining the political and strategic contours of Israel’s relations with much of the Middle East.     

The African Standby Force: The African Union’s tool for the maintenance of peace and security

Declared operationally ready in 2016, the African Standby Force (ASF) has not been deployed in its originally designed form. This is not for the lack of opportunities but rather a demonstration of the power of the Regional Economic Communities/Regional Mechanisms (RECs/RMs) – Africa’s sub-regional security structures – over matters of peace and security. Experience gathered from its short existence suggests that the ASF may never be deployed in its current form. It may instead evolve into a robust framework, adaptable mainly by the RECs/RMs, for addressing varied security challenges. Four things are critical to enhancing the utility of the ASF: the political willingness of the RECs/RMs, the strategic interest of the member states, predictable and sustainable financing, and clarity on the role of the African Capability for Immediate Response to Crisis, the temporary battlegroup that was created to provide the African Union with a rapid response capability, pending the ASF’s operationalization.