维修的有效性和经济性分析

本文提出了维修的有效性和经济性分析的基本方法和基本模型,定义了有效性评价的定量指标,如维修的快速率β_v、功能恢复度β_p、可靠性恢复度β_R和维修性恢复度β_M.上述指标和模型以及费用因素,均可用于优化维修方案。     

Analysis of the effect of bore centerline on projectile exit conditions in small arms

Most finite element models of small arms focus on an idealized barrel, typically one with a perfectly straight bore centerline. Using five different experimentally measured bore centerlines, this investigation analyzes the effect centerline nonlinearity has on projectile exit conditions. This includes the effect of rotating a centerline through several orientations. Modeled using Abaqus/Explicit, this dynamic analysis simulates a single firing cycle for each centerline. Projectile jump is calculated for each model as a measure of the effects of warped centerlines. The warped centerlines have a small effect on barrel dynamics.     

Gabor-CNN for object detection based on small samples

Object detection models based on convolutional neural networks (CNN) have achieved state-of-the-art performance by heavily rely on large-scale training samples. They are insufficient when used in specific applications, such as the detection of military objects, as in these instances, a large number of samples is hard to obtain. In order to solve this problem, this paper proposes the use of Gabor-CNN for object detection based on a small number of samples. First of all, a feature extraction convolution kernel library composed of multi-shape Gabor and color Gabor is constructed, and the optimal Gabor convolution kernel group is obtained by means of training and screening, which is convolved with the input image to obtain feature information of objects with strong auxiliary function. Then, the k-means clustering algorithm is adopted to construct several different sizes of anchor boxes, which improves the quality of the regional proposals. We call this regional proposal process the Gabor-assisted Region Proposal Network (Gabor-assisted RPN). Finally, the Deeply-Utilized Feature Pyramid Network (DU-FPN) method is proposed to strengthen the feature expression of objects in the image. A bottom-up and a top-down feature pyramid is constructed in ResNet-50 and feature information of objects is deeply utilized through the transverse connection and integration of features at various scales. Experimental results show that the method proposed in this paper achieves better results than the state-of-art contrast models on data sets with small samples in terms of accuracy and recall rate, and thus has a strong application prospect.     

The Economic Effect of Military Facility Contraction: A Naval Case Study

The global financial turmoil of 2008 has resulted in the curtailment of military expenditure in most western countries. At a sub-regional-level reductions in the level of activity at a major military facility can have significant economic impact. In the light of this, the paper has two objectives: to analyse the impact of the decision to terminate naval shipbuilding at the United Kingdom’s Portsmouth Naval Base; and, for illustrative purposes, to examine the possible economic consequences of further contraction at the facility. In pursuit of these aims, it is necessary to establish the output, income and employment generated by the base using a bespoke input–output model. The methodology employed can, with appropriate adjustments, be utilised in other military or civilian contexts.     

论科学社会主义理论与实践的新发展

科学社会主义理论是一个开放的体系,具有与时俱进的理论品质。中国改革开放的伟大实践有力推动了科学社会主义理论的发展,社会主义事业将不断发展,科学社会主义理论也将得到不断发展。     

战时营房保障资源动员能力模糊综合评判

战时营房保障资源动员是战时国民经济动员的重要组成部分。提高战时营房保障资源动员能力是做好战时营房保障资源动员工作的关键。由于影响营房保障资源动员能力的因素较多,既有定性的,又有定量的,且各因素又难以精确地描述,所以其评判过程具有模糊性。通过建立评判指标体系,应用模糊综合评判方法对战时营房保障资源动员能力作出评判,该方法具有较强的应用价值。最后,给出了一个应用实例。     

运用市场手段推进消防工作社会化

随着我国社会主义市场经济的发展和完善 ,如何运用市场手段推进消防工作社会化 ,是消防工作改革、创新、发展的新课题 ,也是贯彻落实十六届三中全会和“二十公”会议精神的突破点 ,应该深入研究和探索     

兵团发展循环经济的对策研究

循环经济是一种新型的经济发展模式,也是我国实现可持续发展的重要途径。兵团发展循环经济应从以下几方面入手:转变观念;制定循环经济的发展规划;确定循环经济发展的试点;探索“政府引导、市场推进”的循环经济运行机制;突出重点,注重效率,逐步推进;开发建立循环经济的绿色支撑体系。     

兵团经济体制中存在的问题及思考

产业结构不合理 ,职工整体素质偏低 ,行政管理机构庞大 ,是兵团经济体制中存在的主要问题 ,兵团人应清醒地认识到这些问题 ,采取措施 ,加大力度 ,进一步推动兵团经济体制改革的深入发展     

The political economy of drones

This paper provides a political economy analysis of the evolution of unmanned aerial vehicles (UAV), or ‘drones’ in the USA. Focus is placed on the interplay between the polity and private economic influences, and their impact on the trajectory of political, economic, and military outcomes. We identify the initial formation of the drone industry, trace how the initial relationships between the military and the private sector expanded over time, and discuss present relationships. Understanding the historical evolution of UAV technology, as well as the major players in the industry today, is important for ongoing policy debates regarding the use of drones both domestically and internationally.