武器系统效能评估方法浅论

从武器系统效能概念入手，概括了效能评估的基本步骤。简要阐述了各种效能评估的方法及其优缺点，主要有试验统计法、专家调查法、指数法、解析法、层次分析法、SEA法等。熟练掌握和理解了这些方法，就可以为武器系统的研制提供可靠准确的数据，避免不必要的浪费和开支。     

土壤理化性质对TPH污染土壤氧化修复的影响研究

目的 为探究土壤理化性质对总石油烃(TPH)污染土壤氧化修复效果的影响,进而寻求针对TPH污染土壤的高效氧化体系。方法 选用西南地区紫色土分别配制不同土壤有机质含量、粒径、阳离子交换量的TPH污染土壤,选取CaO₂类芬顿、活化Na₂S₂O₈、CaO₂/Na₂S₂O₈复合氧化体系,以各自最优氧化条件在室温25℃的条件下进行氧化实验,考查土壤理化性质对土壤TPH负载能力及氧化修复效果的影响。结果 在TPH投加量均为15 000 mg/kg的条件下,土壤TPH负载能力与土壤有机质含量、阳离子交换量呈正相关,与土壤粒径呈负相关,其影响程度为：有机质含量>粒径>阳离子交换量;土壤TPH降解率与土壤有机质含量、阳离子交换量及粒径皆呈负相关,其影响程度为：粒径>有机质含量>阳离子交换量。结论 在各体系最优氧化条件下,CaO₂/Na₂S₂O...     

地市级移动计量标准量值溯源及比对方法的研究

辽宁省气象装备保障中心为监测评估抚顺等11个地市级气象计量业务质量,确保移动计量核查设备量值准确性与可靠性,从量值溯源的定义、计划、途径与实施等方面开展,对抚顺等11地市移动核查设备的量值溯源工作,其次根据JJF 1117-2010《计量比对》规范研究比对实施的方法,确定比对传递标准的路线.     

超Lorenz 混沌系统的同步及其在保密通信中的应用

为了加密并准确解密传输的信息,将超Lorenz混沌系统的同步应用在保密通信中。基于线性稳定性定理,对超五阶Lorenz系统实现了超混沌系统的输出反馈控制同步,设计了超混沌系统的输出反馈控制器,实现了响应系统与驱动系统的同步,并将同步的混沌系统应用到混沌掩盖保密通信中。仿真结果表明,超Lorenz混沌系统能够快速达到同步,且在混沌掩盖通信方案中,有用信号可以有效地在接收端恢复出来。     

Counter-example to ‘Sufficient and necessary condition for the asymptotic stability of discrete linear interval systems’

In Jiang (1988), a condition is given which is supposedly necessary and sufficient for the stability of interval matrices in discrete-time systems. We demonstrate, via a counter-example, that the condition given is, in fact, not sufficient.     

Reduced-order filtering for networks with Markovian jumping parameters and missing measurements

The problem of reduced-order H _∞ filters design for Markovian jumping complex networks with polytopic time-varying transition probability matrices is first addressed in this paper, where the dynamic of each node is described by the sector-bounded nonlinearity. For the measurements, both quantisation and packet dropouts are considered, where each node has its own packet dropout rate. By using the mode- and transition probability-dependent Lyapunov function approach, two sufficient conditions are provided to ensure the stochastic stability and the disturbance attenuation performance of the resulting filtering error system. Then, the mode-independent reduced-order filters design method is proposed, and the filter parameters are given explicitly by linear matrix inequality method. Finally, the effectiveness of the theoretic results presented is illustrated via a numerical example which contains performance comparison of different mode-independent reduced-order filters.     

A strategy of multi-criteria decision-making task ranking in social-networks

In this paper, we formulate an interesting problem of multicriteria decision-making task ranking in social networks (MCDM-TR). MCDM-TR contains two phases: (1) finding a set of decision-making experts for tasks who not only complete the decision-making of the given task but also have the minimal communication cost among them; (2) ranking the decision-made tasks according to a certain decision standard. In this paper, we focus on these two phases and propose an efficient algorithm for multicriteria decision-making tasks in social networks. A case study of academic conferences quality evaluation system (ACQES) is also studied to illustrate our strategy.     

Design and FEM simulation study of the electro-thermal excitation resonant beam with slit-structure

This paper proposes a slit-resonant beam based on the double clamped resonant beam theory of silicon micro-machined resonant pressure sensors. The slit structure can enhance surface alternating stress in the root area of beam while vibrating. Finite element method (FEM) is applied to calculate the stress concentration magnification, and we carry out a computational study of the effects of size and location of slit structure in terms of mechanical properties of resonant beam, such as stress concentration on resonant beam and natural frequency of resonant beam, as well as sensing performance, such as resonant beam amplitude sensitivity. Our simulations show that the slit structure could strengthen the stress concentration and increase the amplitude detection sensitivity, and the variations of these parameters can substantially influence the performance of slit structure. The research of stress concentration, caused by silt structure, could provide reference for further optimization and design for the resonant beam.     

采用超声波特性参量研究PBX炸药的热处理

对压制成型Φ20mm×10mm高聚物粘结炸药PBX03试样进行了50℃条件下累积9天的热处理试验,采用超声波特性参量检测了热处理试样,获得了PBX03试样热处理作用及机理的新认识:PBX03试样的超声波增益和声速值在热处理过程中均呈现出趋同的特征;适当的热处理有助于改善PBX03压制件内部质量的一致性;PBX03中TATB的不可逆长大可能是前述结果的主要致因。