采用反射式液晶显示器和有机电致发光器件前后双置组合而成的高环境对比度显示器

一种高环境对比度(A-CR)和大开口率的显示器已经从理论上证明,并通过把一个正常显黑反射型显示器(NB-RLCD)和一个有机电致发光器件(OLED)堆垛的实验加以证明。这种前后双置(以下称为tandem型)的器件组合可以分别在明亮或昏暗的环境下切换NB-RLCD模式或OLED模式。RLCD的正常显黑特性也可以提升OLED模式工作时的A-CR性能。为了在RLCD模式下获得更好的图像品质,一个复杂并且具有传输功能的结构被用于消除镜面反射和提高可视角至CR﹥2:1超过55°的锥面可视角度。另外,这样的结构也可以提高OLED49.4%的表面量子效率。在我们的实验里,忽略环境亮度因素并使A-CR保持在100:1以上。     

实时嵌入式软件测试研究与应用

实时嵌入式软件的应用与开发是当今计算机软件发展领域的一个热点,要保证实时嵌入式软件的质量是非常重要的.分析了实时嵌入式软件的特点和实时嵌入式软件测试的总体结构和宿主机及目标机的体系结构,探讨了脚本语言及其解释器.     

基于可控随机变换的分形树生成算法及实现

分形树的生成算法是自然景物模拟中的热点问题,针对目前生成算法中的运行显示速度慢,树形变化少,颜色单一等问题,提出了一种可控随机交换的分形树生成算法.该算法对分形树的生成参数进行随机控制.给出了该算法的核心思想及实现过程,仿真实验得到了较好的生成显示速度及多姿态、多色彩的具有三维真实感的分形树.算法具有一定的通用性并可为其他自然景物的模拟提供较高的研究参考价值.     

矿用隔爆型变频器散热方式的选择

根据变频器功率和使用环境的不同,为矿用隔爆型变频器提出几种适合的散热方式。     

An inchworm mobile robot using electromagnetic linear actuator

The capability of motion is one of the important aspects for a micro-robot to fulfill its given tasks. Micro-autonomous systems usually require large force, large displacement and less power consumption. Among different actuation schemes, electromagnetic actuator shows the benefit in a combination of force, displacement and cost effective control. A bristle-based inchworm mobile robot using a short stroke electromagnetic linear actuator is described in the paper. The main body and movable unit of the robot are joined by using a sealed bellows and the bristle legs are designed so that it can operate both on plane surfaces and in liquid. The actuator designed for the robot is a tubular type linear machine with an overall size of Φ7 × 10 mm. The key dimensions of the actuator were determined through magnetic field analysis to achieve optimum force output and necessary travel stroke within the limited space. The predicted actuation force of the actuator is 20 mN and the stroke length is 1.2 mm. Two working prototypes of the actuator were constructed and the performance tests show the effectiveness of the design. A sensorless control scheme with a novel start-up strategy for the designed actuator was developed based on the robotic system modeling and the analyzed results show the satisfactory performance of the system.     

局部统计同态滤波用于CO2激光成像的图像处理

在将局部统计同态滤波方法用于单幅CO2激光成像雷达图像处理的基础上，重点研究分析了参数选取与图像处理效果的关系；同时也分析了同态均值滤波的局部统计同态滤波。     

High Electromagnetic Shielding of a 2.5-Gbps Plastic Transceiver Module Using Dispersive Multiwall Carbon Nanotubes

A novel polyimide film, consisting of finely dispersed multiwall carbon nanotubes (MWCNTs) in an ionic liquid (IL), is demonstrated to be high shielding effectiveness (SE) for use in packaging a 2.5-Gbps plastic transceiver module. The IL-dispersed MWCNT composite exhibits a high SE of 40 ~ 46 dB. By comparison, the composite fabricated by nondispersive process requires a higher loading of MWCNTs at 50 wt- % than the IL-dispersed process at only 30 wt-%. The electromagnetic susceptibility (EMS) performance is experimentally evaluated by the eye diagram and bit-error-rate for a 2.5-Gbps lightwave transmission system. The package housing fabricated by the dispersive MWCNT composites shows an enhanced EMS performance, an improved mask margin, and a lower-power penalty. These results indicate that the IL-dispersed MWCNT composites are suitable for packaging low-cost and high-performance optical transceiver modules used in the fiber to the home lightwave transmission systems.     

F150交换机告警关联规则的研究

为了提高电信网络运营效率，降低维护成本，电信运营企业在网络告警管理系统中需要引入数据挖掘技术。本文主要研究利用数据挖掘技术来进行故障的管理，即对告警进行关联性分析，详细分析了告警序列数据的关联规则挖掘算法，并在南昌本地网F150交换机的告警数据库中予以实现，同时对实际挖掘结果进行分析和整理，推导出一些实用的关联规则。     

DTS相干声学编码

介绍了相干声学编码，探讨了线性PCM数字信号的缺陷，并从自适应差分编码和心理声学分析两个方面阐述了编码策略，接着论述了多相滤波器组的特点，并简要说明了性能测试及其结果。结合当前的发展趋势，阐述了DTS的应用现状。     

Effects of information sharing on supply chain performance in electronic commerce

As businesses adopt electronic commerce, information exchange between business partners within a supply chain becomes more essential. Information exchange is often considered when companies implement the Extranet. This study aims to analyze the impact of various levels of information sharing including order, inventory, and demand information, which is based on transaction costs. This study further examines the effects on supply chain performance in electronic commerce. Specifically, the multiagent simulation system Swarm is employed to simulate and analyze the buyer-seller correlation in sharing information among business partners in supply chains. Our findings indicate that the more detailed information shared between firms, the lower the total cost, the higher the order fulfillment rate, and the shorter the order cycle time. In other words, information sharing may reduce the demand uncertainty that firms normally encounter. Firms that share information between trading partners tend to transact with a reduced number of suppliers. In sum, this work illustrates the effects of various levels of information sharing on supply chain performance in electronic commerce.