基于数据融合技术的液压系统故障诊断

在分析数据融合基本概念和原理的基础上,阐述了多传感器数据融合在设备故障诊断中的应用技术,提出了将多传感器数据融合技术应用到液压系统的故障诊断方法,并应用于某车辆液压系统故障诊断实验,给出了实现计算机自动诊断的程序流程,结果表明该方法能够及时准确地提取液压系统故障特征、诊断出故障部位、找出故障原因.     

病态信息的控制方法

在总结近10年病态信息控制工作经验的基础上,介绍了病态信息控制方法发展的6个阶段,提出了病态信息控制方法体系的3个层次和3种应用类型,形成了预处待用制和病态决策制2种病态信息处理的基本方法.3个层次是指:面向国家与社会的社会道德与法律的控制方法、面向组织的政策与策略的控制方法、面向基层的管理与技术的控制方法.3种类型是指检测/监测、整理、诊断方法.     

Group testing procedures with quantitative features and incomplete identification

We present a group testing model for items characterized by marker random variables. An item is defined to be good (defective) if its marker is below (above) a given threshold. The items can be tested in groups; the goal is to obtain a prespecified number of good items by testing them in optimally sized groups. Besides this group size, the controller has to select a threshold value for the group marker sums, and the target number of groups which by the tests are classified to consist only of good items. These decision variables have to be chosen so as to minimize a cost function, which is a linear combination of the expected number of group tests and an expected penalty for missing the desired number of good items, subject to constraints on the probabilities of misclassifications. We treat two models of this kind: the first one is based on an infinite population size, whereas the second one deals with the case of a finite number of available items. All performance measures are derived in closed form; approximations are also given. Furthermore, we prove monotonicity properties of the components of the objective function and of the constraints. In several examples, we study (i) the dependence of the cost function on the decision variables and (ii) the dependence of the optimal values of the decision variables (group size, group marker threshold, and stopping rule for groups classified as clean) and of the target functionals (optimal expected number of tests, optimal expected penalty, and minimal expected cost) on the system parameters.© 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011     

基于协同交战的战术数据链技术研究

介绍了外军典型战术数据链的发展情况,同时根据未来网络化作战需求,对基于协同交战的战术数据链的作战使用进行了研究,提出了基于协同交战的战术数据链体系结构、功能需求和指标需求,最后给出了基于协同交战的战术数据链的发展建议.     

机房漏水检测与精确定位装置研究

机房漏水是危及精密信息设备长期稳定可靠运行的重大安全隐患。为了解决传统定位装置难以实现漏水点精确定位的问题,从传感电缆的检漏原理出发,利用分压补偿原理,通过STEP7软件编程,设计了一个结合自检、漏水检测和漏水定位3种功能的机房漏水检测与定位装置。在此基础上搭建了实验系统,经测试实验,结果表明短距离定位精度可以达到1．70％,从而证实了该装置检测的有效性和定位的精确性。     

指挥与控制装备技术发展趋势

研究分析了指挥与控制装备技术的发展趋势,并对具有重要影响指控发展的前沿技术作出了分析,最后对大数据技术作了概述,指出了在指挥控制装备中应用的可能性。     

基于动态窗口的灰色加权填充算法及应用?

为解决复杂系统中单属性缺失数据填充困难问题,提出了基于动态窗口的灰色加权填充算法。该算法通过建立双向灰色预测模型,并采用模型精度评价系数加权填充缺失数据,有效增强了算法的准确性;提出基于灰色模型评价系数反馈的动态伸缩窗口概念,寻找产生最优模型的训练数据序列,使算法具有良好的鲁棒性和适应性。实验结果表明,该方法在RMSE和MA两项指标上均优于传统的双向灰插值、灰插值、多项式插值等方法。     

基于数据挖掘的战场目标综合识别技术

分析了现有战场目标识别技术存在的问题,提出了基于数据挖掘的战场目标综合识别总体框架,对目标识别知识表示、目标特征知识挖掘、作战模式知识挖掘以及目标综合识别智能化推理等关键技术进行了研究,并说明了各关键技术在战场目标识别中的应用示例,可为提高战场目标识别的自动化、智能化水平提供借鉴。     

多样化军事任务异构数据集成应用方法

为实现多源异构作战数据高效融合共享,提出了改进型中间件异构数据集成框架,设计了作战数据融合运用核心组件,实现了多源异构作战数据综合应用平台,提高了各类作战数据的融合运用效率,为指挥员及时掌握战场态势,高效科学决策提供了数据支撑。     

Monitoring censored lifetime data with a weighted‐likelihood scheme

Lifetime experiments are common in many research areas and industrial applications. Recently, process monitoring for lifetime observations has received increasing attention. However, some existing methods are inadequate as neither their in control (IC) nor out of control (OC) performance is satisfactory. In addition, the challenges associated with designing robust and flexible control schemes have yet to be fully addressed. To overcome these limitations, this article utilizes a newly developed weighted likelihood ratio test, and proposes a novel monitoring strategy that automatically combines the likelihood of past samples with the exponential weighted sum average scheme. The proposed Censored Observation‐based Weighted‐Likelihood (COWL) control chart gives desirable IC and OC performances and is robust under various scenarios. In addition, a self‐starting control chart is introduced to cope with the problem of insufficient reference samples. Our simulation shows a stronger power in detecting changes in the censored lifetime data using our scheme than using other alternatives. A real industrial example based on the breaking strength of carbon fiber also demonstrates the effectiveness of the proposed method. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 631–646, 2017