Estimating non‐transparent military expenditures: The case of china (PRC)∗

Data limitations arising from non‐transparency in military expenditure reporting impose significant constraints on economists studying country and comparative developments in this field. This article focuses on the case of China. It reviews the recent literature on China's military expenditure, examines the variance in published estimates, and identifies three factors which help explain the variance: budgetary falsification; non‐budgeted PLA revenue; and the US dollar purchasing‐power parity of the yuan. Conclusions emphasize important policy implications of such variance and suggest a more active role for defence economists in a field of research generating considerable attention from international relations scholars.     

RELIABLE ENERGY SUPPLY AND NONPROLIFERATION

The phenomenon of global warming has led to a revival of the prospects for increased nuclear energy production worldwide, yet such increased production carries with it the increased risk of proliferation. To mitigate this risk, various multinational arrangements have been proposed to provide reliable supply of nuclear fuel while at the same time discouraging the construction of national plants for nuclear enrichment and reprocessing. This article provides a brief history of some of these proposals and concludes that the likelihood of success for such schemes as effective tools for nonproliferation is not high at this time. A proposal from the World Council on Renewable Energy to expand the understanding of supplier obligations under Article IV of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) to include the development of non-nuclear energy technologies for NPT parties in good standing is potentially a much better nonproliferation tool. Such an approach tracks the ideas contained in Title V of the Nuclear Non-Proliferation Act of 1978, which has recently received revived congressional interest.     

LDO稳压器敏感度建模与仿真技术研究

基于LDO稳压器在电磁干扰（EMI）下产生直流偏移失效的机理分析,展开敏感度建模与仿真方法研究。使用一款实验芯片,创新地引入片上电压传感器,用于测试EMI在LDO稳压器内部的传播特性。在敏感度建模中,建立等效电路模型,通过直流功能测试,Z参数阻抗特性测试验证模型的正确性,将该模型用于LDO稳压器的敏感度预测。在敏感度仿真过程中,通过分析关键子电路和不断增加寄生元件,仿真不同寄生因素对敏感度影响的权重。将仿真结果与传导直接注入法（DPI）片上测试结果对比,仿真结果与DPI测试在频域1MHz至1GHz匹配。     

融合可修性度量和双线学习的反导预案修正

对反导预案应用中基于预案推理的预案修正技术进行了研究,提出了一种新的反导预案修正方法。首先,在定义预案属性否决权和修正裕度的基础上,设计了一种考虑预案可修性的相似度计算方法;然后,以其为预案检索和修正规则学习的导向,融合离线预案库学习和在线实时学习策略,给出了预案修正规则的双线学习方法;建立了融合预案可修性度量和双线学习的反导预案修正模型,并对规则的归纳学习策略进行了研究;最后,进行了实例验证,结果证明了新修正方法的可行性和有效性。     

含脉冲负载的综合电力系统储能优化配置研究

考虑到舰船环境限制和高能脉冲负载对储能的需求,有必要对储能装置进行合理的选型和优化配置,来提升综合电力系统性能。为此,基于带权极小模理想点法和层次分析法,提出了一种储能装置性能评价函数,并以其为优化目标,进行储能装置优化配置。所提出的评价函数充分考虑系统需求和脉冲负载特性,以储能装置体积、质量和经济性作为评价函数主要组成部分,同时考虑功率、能量、电压、荷电状态等约束,建立优化配置模型,并采用差分进化算法进行求解。以高性能锂电池和超级电容器为例,对所提模型进行求解计算,结果表明在所给权重系数下锂电池性能更优,更适用于综合电力系统,并给出了优化配置后的指导方案。     

医院供配电系统谐波测量和分析

为治理日趋严重的医院供配电系统谐波污染,需要深入了解医院谐波分布。利用FLUKE 43B对某医院进行现场谐波测试,基于所得数据重点分析了医院供配电系统谐波污染和谐波源分布情况,根据医院谐波污染特点总结了治理方法。结果表明:医院供配电系统存在严重的谐波污染。被测量医院设备先进,种类齐全,测试所得数据具有较强的代表性,可为医院供配电系统谐波研究、谐波治理和滤波设备选择提供基础数据参考。     

多尺度PCA-HOG遥感异源图像匹配算法

针对遥感异源图像匹配中非线性灰度畸变和强噪声干扰问题,提出一种基于主成分分析(Principal Components Analysis,PCA)和方向梯度直方图(Histogram of Oriented Gradients,HOG)的遥感异源图像匹配算法.该算法利用HOG提取图像间的几何结构共性特征,能有效克服异源...     

某型发射筒动力接管部位应力的有限元法分析

基于有限元理论，建立某型发射筒动力接管部位的弹性力学模型，计算不同工质内压作用下动力接管部位的应力分布情况，探讨分析动力接管部位产生局部应力集中的主要原因及分布规律。     

基于ADC模型的数据链系统作战效能评估

从数据链系统的信息支持能力出发,结合指标体系的选取和确立原则,建立了数据链系统作战效能指标体系。提出并建立了数据链系统作战效能评估的ADC模型,针对模型中能力矩阵C计算繁杂的问题,考虑到某些指标在分析过程中定量化的需要,综合运用幂指数法和层次分析法对能力矩阵C子模型及体系指标进行定量化分析和计算。对于运用幂指数法中涉及各指标的加权系数采用层次分析法来确定,进一步分析了层次分析法的原理及步骤。最后给出实例,结果表明该模型具有一定的合理性且计算简单、易于理解、结论可靠等优点。     

对制约权力腐败问题的思考

权力腐败对社会产生的影响和危害是巨大的。制约权力腐败的对策:建立完善的法规制度体系;明确一把手的地位与作用;强化权力决策的标准程序;找准反腐败的动力源;完善监督机制,实现权力的基本制衡。