参数估计在目标跟踪中应用仿真研究

本文采用最小二乘参数估计的方法在已知观测数据的基础上对假定的目标的初始位置和速度进行了估计，从而对目标进行跟踪仿真，并对跟踪性能进行了分析。     

企业股份制改造资产评估增值的会计税务处理

本文介绍了我国企业股份制改造资产评估增值的两种调整方法，通过比较提出了即简洁又准确的核算方法。     

卫星天线消旋组合件运行质量评估的实验研究

对卫星天线消旋组合件的关键部件轴承，进行了振动监测，特征分析和质量评估，提出了试验分析方法、评估标准及检测规程。     

A complexity-scalable software-based MPEG-2 video encoder

With the development of general-purpose processors (GPP) and video signal processing algorithms, it is possible to implement a software-based real-time video encoder on GPP, and its low cost and easy upgrade attract developers' interests to transfer video encoding from specialized hardware to more flexible software. In this paper, the encoding structure is set up first to support complexity scalability; then a lot of high performance algorithms are used on the key time-consuming modules in coding process; finally, at programming level, processor characteristics are considered to improve data access efficiency and processing parallelism. Other programming methods such as lookup table are adopted to reduce the computational complexity. Simulation results showed that these ideas could not only improve the global performance of video coding, but also provide great flexibility in complexity regulation.     

Using the standard Wald confidence interval for a population proportion hypothesis test is a common mistake

Employing a Wald confidence interval to test hypotheses about population proportions could lead to an increase in Type I or Type II errors unless the hypothesized value, p0, is used in computing its standard error rather than the sample proportion.     

基于声发射及时延估计的风源系统泄漏定位

动车风源系统专门用于为动车整车制动系统供风,而漏风问题会影响供风效率乃至整个制动系统。旨在利用声发射传感器技术,针对风源系统中最常见的漏风问题进行检测,并利用时延估计技术进行泄漏点定位,从而及时发现泄漏点并采取措施解决问题,以降低风源系统发生故障的风险,减少故障带来的损失。采用小波包分析对传感器采集的数据进行分解重构,以减小外界环境噪音对结果的干扰,最后利用互相关分析及定位公式对漏风点进行定位。仿真实验结果表明,该方法具有较强的抗干扰能力与较高的精度,精度可达到95%左右,因此能较好地解决风源系统漏风定位问题。     

Curvatures estimation on triangular mesh

Curvatures are important geometric attributes of surfaces. There are many applications that require as a first step the accurate estimation of curvatures at arbitrary vertices on a triangulated surface. Chen and Schmitt （1992） and Taubin （1995） presented two simple methods to estimate principal curvatures. They used circular arcs to approximate the normal curvature. We find this may cause large error in some cases. In this paper, we describe a more accurate method to estimate the normal curvature, and present a novel algorithm to estimate principal curvatures by simplifying the Chen and Schmitt＇s method. Some comparison results are also shown in this paper.     

关于黎曼-斯蒂尔切斯积分近似计算的注记

研究了黎曼-斯蒂尔切斯(Riemann-Stieltjes)积分的近似计算,对于被积函数f!x"为Lipschitz连续以及高阶导数有界的情形分别得出的两种近似计算公式:矩形计算公式和梯形计算公式及其误差估计,并且通过实际例子的两种近似计算方法的不同精度,验证了文中的结果。     

图像序列中快速全局运动估计和运动目标提取算法

提出了一种基于边界灰度投影匹配的全局运动估计和运动目标提取算法．算法将边界灰度水平投影和垂直投影值作为匹配特征,较好地估计了全局运动参数．由于只需计算一维特征向量所以降低了全局运动估计的计算量．经过全局运动补偿后,可以运用传统的帧间差法得到运动目标、为了减少噪声的影响,准确地提取到目标,采用了高阶统计量的方法（HOS）来区分背景和运动目标．试验结果证明所提出的方法在估计全局运动参数和提取运动目标方面有较好的鲁棒性．     

基于支持向量机的控制图异常模式参数估计

针对控制图5种异常模式的6个参数,提出基于一对一算法的多类分类支持向量机的控制图异常模式下的参数估计方法.在模型构造中采用遗传算法优化支持向量机的参数.仿真实验结果表明.该方法结构简单,收敛速度快,具有较高的识别精度,适合于控制图异常模式的参数估计.