A probabilistic framework for specular shape-from-shading

One of the problems that hinders conventional methods for shape-from-shading is the presence of local specularities which may be misidentified as high curvature surface features. In this paper we address the problem of estimating the proportions of Lambertian and specular reflection components in order to improve the quality of surface normal information recoverable using shape-from-shading. The framework for our study is provided by the iterated conditional modes algorithm. We develop a maximum a posteriori probability (MAP) estimation method for estimating the mixing proportions for Lambertian and specular reflectance, and also, for recovering local surface normals. The MAP estimation scheme has two model ingredients. First, there are separate conditional measurement densities which describe the distributions of surface normal directions for the Lambertian and specular reflectance components. We experimentally compare three different models for the specular component. The second ingredient is a smoothness prior which models the distribution of surface normal directions over local image regions. We demonstrate the utility of method on real-world data. Ground truth data is provided by imagery obtained with crossed polaroid filters. This reveals not only that the method accurately estimates the proportion of specular reflection, but that it also results in good surface normal reconstruction in the proximity of specular highlights.     

Performance evaluation of continuous production lines with machines having different processing times and multiple failure modes

This paper presents an approximate analytical method for the performance evaluation of asynchronous production lines with deterministic processing times, multiple failure modes and finite buffer capacity. The discrete flow of parts is approximated by a continuous flow of material. The technique developed here is based on the approximate evaluation of a K machine line by the evaluation of K−1 two-machine lines: unlike previous work on this subject, the multiple failure approach allows to consider real and virtual failure modes for each building block in which the original line is decomposed. Indeed, to reproduce in each two-machine lines the flow of material observed in the related buffer of the original line, real failures are used to take into account the reliability of the physical machines while virtual failures are introduced to model the different interruptions of flow that can arise inside the line thus preventing machines from working. To assess the accuracy of the proposed method, extensive simulation and numerical experiments have been carried out.     

汽车排气污染浓度预测

运用空气质量模式的基本理论，研究汽车尾气排放的扩散规律。选用多种典型空气质量模式，对汽车污染进行计算机模拟。在每一模式下，可对大气稳定度，混合层高度、扩散参数等进行选择计算；并能进行瞬时浓度及长期浓度的预测。设计的程序适用于各种气象务件、各种道路条件、各种车型。     

衣型结构设计模式

本文介绍了服装一体结构模式——衣型的结构特征,讨论了服装结构设计方法的发展方向。     

挠性转子横向振动分析的传递矩阵法

介绍了一种分析挠性转子横向振动特性的传递矩阵法。它由系统的整体传递矩阵及边界条件得到频率方程，由此来计算转子的各阶固有频率；然后利用传输特性方程，求得转子任意截面上的状态向量，从而得到相应的振型函数。研制了一套用于分析挠性转子横向振动特性的专用软件包，可给出转子的各阶固有频率和相应的振型函数。最后，给出了一典型算例。     

一类组合系统的特征与分散固定模

研究了在航空领域中经常遇到的一类组合系统．结果表明，由于这类系统结构的特殊性，它的很多性质，如能控性、能观性及稳定性等都可以通过判断两个低阶系统的相应性质得到．这类系统不存在分散固定膜的充要条件是其能控且能观．     

The majority theorem of centralized multiple BAMs networks

A method for modeling the learning of belief combination in evidential reasoning using a neural network is presented. A centralized network composed of multiple bidirectional associative memories (BAMs) sharing a single output array of neurons is proposed to process the uncertainty management of many pieces of evidence simultaneously. The convergence properties of the multi-BAM network are proved. The combination process of evidence is considered as a resonant process through the multi-BAM networks. Most important of all, a majority rule of decision making in presentation of multiple evidence is also found by the study of signal-noise-ratio (SNR) of the multi-BAM network. Some simulation examples are given. The result is coherent with the intuition of reasoning.     

Asymptotic Stabilisation of Multiple Input Nonlinear Systems via Sliding Modes

A dynamic feedback controller design method is proposed for multiple input systems. The method uses a novel choice of sliding surface to effect asymptotic linearisation of nonlinear differential input output systems and a class of state space systems. The stability of the overall system, that is a canonical state space form with a dynamic feedback, is analysed with a generalised Lyapunov approach plus an asymptotic analysis in a neighbourhood of the origin. The nonlinear system does not have to be expressed in regular form as is the case in many other sliding mode control approaches. A type of zero dynamics, which are the dynamics of the control, are involved. The resulting dynamic feedback is shown to provide chatter free control if the system is minimum phase with respect to the zero dynamics. The theoretical results are applied to Gas Jet systems with two controls.     

Polarization control scheme for surface plasmon and optical guided mode control detection

A technique based on what is known as polarizer–compensator–sample–analyzer (PCSA) scheme in ellipsometry, combined with the Kretschmann configuration to excite plasmon and waveguided modes is described. The system allows the control of the polarization state of the reflected light and is shown to have higher sensitivity than the measurement of only the amplitude of the reflected light. We show the response of the system to variations in temperature and small changes in the refractive index of a liquid.     

现代多媒体网络技术下英语教学模式的思考

随着互联网的迅猛发展，多媒体技术的日趋成熟，网络科技正作为一种新的教学手段对英语教学及其发展产生愈来愈深远的影响。这必将导致英语教学内容、教学手段、教学方法和教学模式的变革。