Multivariate statistical process control based on multiway locality preserving projections

An approach for multivariate statistical process control based on multiway locality preserving projections (LPP) is presented. The recently developed LPP is a linear dimensionality reduction technique for preserving the neighborhood structure of the data set. It is characterized by capturing the intrinsic structure of the observed data and finding more meaningful low-dimensional information hidden in the high-dimensional observations compared with PCA. In this study, LPP is used to extract the intrinsic geometrical structure of the process data. Hotelling’s T² (D) and the squared prediction error (SPE or Q) statistic charts for on-line monitoring are then presented, and the contribution plots of these two statistical indices are used for fault diagnosis. Moreover, a moving window technique is used for the implementation of on-line monitoring. Case study was carried out with the data of industrial penicillin fed-batch cultivations. As a comparison, the results obtained with the MPCA are also presented. It is concluded that the Multiway LPP (MLPP) outperforms the conventional MPCA. Finally, the robustness of the MLPP monitoring is analyzed by adding noises to the original data.     

面向世博场馆的移动智能监控系统研究与实现

随着社会的发展,移动智能监控已经成为客观趋势.针对上海市世界博览会场馆监控这个应用场景,研究面向世博场馆的移动智能监控系统的关键技术,解决了移动交互监控、运动目标跟踪两个难题,并最终实现了移动智能监控系统软件.经过测试,该移动智能监控系统在监控精确度和灵敏度方面均表现良好.     

一种基于模糊密度动态调节的融合目标识别方法

针对工程应用的需要,给出一种根据实时动态数据确定模糊密度调节系数的方法,并建立了基于模糊密度动态调节的融合目标识别算法.最后通过仿真实验给出了各种模糊积分用于目标融合识别时的识别结果,验证了所提出方法的有效性.     

无线传感器网络中基于信息收益的多目标跟踪

目标跟踪是无线传感器网络应用的一个很重要的研究领域,节点有限的通信能力、处理能力、存储能力限制了传统跟踪算法的使用.为了提高网络的信息感知能力和降低能量消耗,提出基于信息收益的加权质心多目标跟踪算法,算法通过信息收益函数选取并唤醒节点对目标感知,通过传感器属性信息解模糊,并利用加权质心算法实现了多目标跟踪.仿真结果表明,与Bayes滤波协同多目标跟踪算法相比,算法虽精度略低,但时间复杂度低、失跟率低、实时性高,总体性能优于前者.     

飞行目标红外多光谱高效识别算法

随着新型诱饵的快速发展,在日益复杂的目标环境中探测识别真假目标是红外探测识别系统最难解决的技术问题之一.通过分析天空背景下红外小目标,干扰物,噪音及背景的光谱特性,利用人造飞行目标光谱辐射强度高且相邻波段光谱辐射强度连续性特点,提出了一种以多光谱辐射强度和梯度相组合的目标识别高效算法.就此给出了相应的仿真算例,验证了算法在获取的红外图像信噪比很低,背景高亮度,多个诱饵干扰的条件下也能准确识别目标,具有更强的自适应性,更高的识别率和更为快捷的处理能力.     

基于双层预测机制的传感器网络目标跟踪算法

针对层次型传感器网络的目标跟踪问题,提出了一种基于双层预测机制的目标跟踪算法,由传感器节点执行Bayes估计算法进行目标位置的预测与更新(微观预测);由簇头进行基于曲线运动方程的目标位置预测(宏观预测),并用预测结果对传感器节点所得到的目标位置进行更新,提高了目标位置计算精度.仿真结果表明,算法具有较好的跟踪精度和能量效率.     

一种基于受限网络的移动对象索引

为了有效地支持城市交通网络中移动对象的过去、现在和将来的轨迹查询,在基于模拟预测的位置表示模型基础上,提出了一种两层R树加上一个表结构的复合索引结构AUC(Adaptive Unit Compounding).根据城市交通网的特征,采用了一种带有环形交叉口的元胞自动机模型模拟移动对象的将来轨迹,并用线性回归和圆弧曲线拟合分别得到对象在规则路段和交叉口的轨迹预测方程;根据移动对象的运动特性,采用了一种新的自适应单元(AU)作为索引结构的基本单位.实验表明,AUC索引的查询和更新性能都要优于TPR树和TB树.     

Sensor management for tracking smart targets

We consider the problem of tracking a “smart” target. That is, a target that is aware it is being tracked and modifies its behaviour accordingly. To track such targets effectively it is necessary to modify the behaviour of the tracking sensor in response to the target. We consider that the best framework for such a problem is that of a mathematical game. In this paper, we consider an idealised version of this problem that illustrates some of the issues that can occur when attempting to track a smart target and the utility of a game theoretic framework.     

Characterisation of flucloxacillin and 5-hydroxymethyl flucloxacillin haptenated HSA in vitro and in vivo

Flucloxacillin is a synthetic penicillin used in the treatment of Staphylococcal infections. Adverse reactions to the drug are believed to arise through covalent modification of proteins, with tissue damage occurring secondary to an immune reaction. Serum proteins have been shown by adduct-specific antibodies to be modified by flucloxacillin, but the nature and sites of modification have not been characterised. Here, in vitro studies on HSA have shown by MS that the modification of protein lysine residues occurs in a dose-, time- and site-dependent manner. Affinity, cation exchange and reversed phase chromatography prior to MS revealed in vivo modification of HSA with flucloxacillin in tolerant patients, with up to nine modified lysine residues being detected in each patient, and with modification of Lys190 and Lys212 being detected in 8/8 patients. It was also revealed for the first time that plasma proteins could be modified with the 5-hydroxymethyl metabolite of flucloxacillin, and that essentially the same Lys residues were targeted by both the parent drug and its metabolite. This study provides a detailed characterisation of sites of chemical modification of an endogenous target and reveals candidate peptides for T-cell and antibody assays of flucloxacillin hypersensitivity.     

A COMPLEX-TYPE FOCUSSED MAGNETRON FOR SPUTTERING

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