一种基于向量空间模型的主观题批改算法

文字类主观题的自动批改是在线考试系统的一个关键技术。本文在研究主观题自动批改技术现状的基础上,提出了一种基于向量空间模型的短语级句子相似度计算方法,并基于该计算方法设计了一种主观题自动批改算法,经验证,实验结果基本达到预期目标。     

Simulation and analysis of edge ghosting for microcapsule e-paper based on particle dynamics and light scattering model

Electronic paper (e-paper) is a reflective display technology with unique advantages, such as bistability, low-power consumption, and high ambient contrast ratio. These features make e-paper a promising candidate for future Internet of Things applications. Among different technologies of e-paper, electrophoretic display (EPD) is the most successful one for commercialization. However, the edge ghosting (also known as the fringing effect) still limits the performance of EPD. Herein, we established a model of particle dynamics of electrophoresis, simulated the edge ghosting of microcapsule EPD, analyzed the edge ghosting effect, and revealed the relationship between thicknesses, dielectric constants of the back binder layer, and the edge ghosting. Two EPD panels with different thicknesses of back binder layer were demonstrated, which verifies the accuracy of this simulation model. With the proposed model, many device mechanisms and product issues can be analyzed and illustrated, which is supposed to guide the researchers in optimizing the device structure design of EPD.     

Support vector machine classification over encrypted data

Applied Intelligence - Support vector machine is one of the most extensively used machine learning algorithms. A typical application scenario of support vector machine classification is the...     

基于温度补偿的低电阻测试仪校准

本文介绍了带温度补偿的低电阻测试仪的校准方法。     

High-Quality Brewster's Angle Polarizer for Broadband Infrared Application

We have designed and constructed a linear polarizer for use with visible and infrared radiation. The broadband polarizer consists of four germanium plates arranged in a chevron geometry. Input radiation is incident near Brewster's angle for the first plate such that the reflected beam is preferentially s-wave polarized. This reflected beam is steered subsequently to the successive plates, always intersecting near Brewster's angle. The beam polarization at the output of the device is almost completely s-wave polarized. The ratio of the paraxial flux of the nearly extinguished p-wave polarized light to the s-wave polarized light transmitted through the device is found to be less than 10(-5) for laser illumination at wavelengths of 0.633, 1.32, 3.39, and 10.6 mum. Calculations predict that extinction ratios less than 10(-5) are achievable over the wavelength range from 0.4 mum to beyond 500 mum. Alternative design geometries involving fewer plates are also described along with their advantages and disadvantages.     

基于FPGA的新型高速CCD图像数据采集系统

介绍一种基于Actel公司Fusion StartKit FPGA的线阵CCD图像数据采集系统。以FPGA作为图像数据的控制和处理核心,通过采用高速A/D、异步FIFO、UART以及电平转换、放大滤波、二值化电路和光学系统实现对图像数据的信号处理,并运用Visual Studio C++和Microsoft公司的基本类库MFC实现对采集数据的显示、绘图、传输控制等。利用搭建的系统平台实现对物体尺寸的测量,通过对所得的数据进行分析处理,明确测量的精度和可以达到的水平。对该系统在实时监控中的优点进行分析。     

Preface

Natural Language Processing(NLP) is a field of computer science and linguistics concerning the interactions between computers and human(natural) languages.There have been sufficient successes in the past decades in this area,which suggest that NLP is now and will continue to be a major area of computer sciences and information technologies. The goal of this special section is to present high-quality contributions that explicate reasoning involved in different areas of NLP both at theoretical and practical levels.The special section has received enthusiastic     

Global adaptive stabilization for high‐order uncertain time‐varying nonlinear systems with time‐delays

This paper focuses on the adaptive stabilization problem for a class of high‐order nonlinear systems with time‐varying uncertainties and unknown time‐delays. Time‐varying uncertain parameters are compensated by combining a function gain with traditional adaptive technique, and unknown multiple time‐delays are manipulated by the delicate choice of an appropriate Lyapunov function. With the help of homogeneous domination idea and recursive design, a continuous adaptive state‐feedback controller is designed to guarantee that resulting closed‐loop systems are globally uniformly stable and original system states converge to zero. The effectiveness of the proposed control scheme is illustrated by the stabilization of delayed neural network systems. Copyright © 2016 John Wiley & Sons, Ltd.     

基于TNC架构的可信USB存储设备管理研究

网络和移动存储设备是传播安全威胁的两个主要途径.文章介绍了TNC的体系结构和设计原理,并对TNC进行扩充,给出了一种可信USB存储设备管理方案,与TNC架构结合在一起,形成了更为完善的可信体系,从源头上阻止了网络和移动存储设备带来的安全威胁.     

复杂系统的定性建模和定性控制综述

综述了复杂系统的定性建模和定性控制．首先阐述了定性建模的理论背景,讨论了 主要的定性建模研究方法及定性模型特性;接着介绍了定性控制的研究进展,对定性控制方 法进行了分类研究,探讨了定性控制器的设计及定性控制系统性能;最后就复杂系统的定性 建模和定性控制研究发展进行了评述．