基于下近似分布粒度熵的变精度悲观多粒度粗糙集粒度约简

将下近似分布约简引入变精度悲观多粒度粗糙集,定义了变精度悲观多粒度粗糙集的下近似分布粒度熵,基于下近似分布粒度熵定义了变精度悲观多粒度粗糙集粒度的重要度,并设计了基于下近似分布粒度熵的悲观多粒度粗糙集启发式粒度约简算法,通过实例验证了算法的有效性。     

多径环境下直扩信号PN码捕获性能分析*

针对多径环境下极微弱动态长周期伪码直扩(DS-SS)信号的捕获问题,拓展了单径环境下基于部分相关值与功率谱累积平均相结合的捕获算法,提出了多径环境下直扩信号的伪码捕获算法。该算法通过部分相关,得到了反映多普勒频偏的正弦信号,然后将部分相关值的功率谱累积平均,从而达到在多径环境下检测微弱信号的目的。给出了基于该算法的多径直扩信号模型,分析了该算法在多径环境下的捕获性能,通过计算机仿真验证了多径环境下该算法的可行性,并对比了多径和单径环境下的捕获效果。     

复杂环境下多机器人觅食路径规划与控制

针对多机器人系统领域中复杂环境下的稳定协同觅食问题,利用粒子群优化算法规划出多机器人中心位置在相应目标下的最优光滑路径.在此基础上设计了相应的分布式控制策略,并对该控制策略下多机器人系统运动的稳定性和内聚性进行了分析,证明了群体内部平均动能能够收敛至给定值,进而保证了多机器人系统运动规模的可控性,且不发生碰撞.仿真试验结果表明,在该控制策略下,多机器人系统能够在复杂的环境下有效地实现稳定觅食行为.     

多模式下的反合一算法

证明了多模式环境下存在最小反合一,提出了一种反合一算法,并介绍了多模式下反合一的应用.     

基于Delphi实现多屏程序

介绍了Windows系统下多个显卡的安装,实现一台主机连接多个显示器的物理连接。同时重点以实例程序介绍了在Delphi环境下的多屏程序的实现。     

基于Delphi实现多屏程序

介绍了Windows系统下多个显卡的安装,实现一台主机连接多个显示器的物理连接.同时重点以实例程序介绍了在Delphi环境下的多屏程序的实现.     

一种多门户环境下服务管理框架的设计

多门户环境下门户系统包含门户服务器和多个子门户应用。要维持正常的运行维护,门户系统就需要提供相应的服务。多门户环境下子门户众多,所需的服务数量众多,实现对这些服务的有效管理至关重要。设计了一种多门户环境下基于事件的服务管理框架,引入事件驱动机制,实现了对多门户环境下服务的高效灵活的管理。     

不确定环境下多机器人编队控制研究

针对多机器人在不确定环境下难以保持某种队形到达预定目标等问题,提出了一种无须全局坐标的多机器人编队控制算法。该算法通过Reynolds类鸟群模拟方法设计了“分离”“对齐”“队形”三规则的控制器来实现多机器人任意队形保持控制,并增加切换规则来实现多机器人队形变换。在不同场景及复杂环境下进行仿真实验,验证了提出方法的优越性。该算法能够使多机器人在不确定环境下保持队形到达目标,对于救援、救灾下多机器人的运用具有重要意义。     

基于红外传感皮肤的多关节机器人自主运动方法研究

本文研究了障碍环境下多关节机器人自主实时避碰运动理论、技术与方法. 研制的新型红外传感皮肤, 可以为多关节机器人提供所需要的周围环境信息. 针对非结构化环境下的多关节机器人实时避障问题, 提出了一种未知环境下的机器人模糊路径实时规划新方法. 实验结果表明: 基于研制的红外传感皮肤和模糊运动规划算法, 多关节机器人可以在未知或时变环境下自主工作.     

多下一跳路由机制下负载均衡算法研究*

多下一跳路由机制中,各个节点都预先建立多下一跳转发表。在路由收敛期间,数据通过多下一跳转发表转发,从而解决断流问题,提高网络的自愈能力。提出了一种多下一跳路由机制下的负载均衡转发算法。该算法包括三个部分,即选择候选下一跳集、数据流分配映射和基于过载链路的反馈式动态调整。采用哈希函数分配数据流保证了每个业务流的报文保序问题。通过对下一跳链路的实时信息统计,采用动态调整机制可以达到很好的均衡效果。     

A comparison of the augmented bar display and the object display

Two experiments were performed to test the hypothesis that object displays facilitate integration task performance because they contain information that is not readily accessible in standard bar displays. The first experiment demonstrated that when the extra information present in an object display is added to a bar display, as in the augmented bar display, integration task performance can be improved in the bar display. The second experiment shows that integration task performance is poor with an object display when the extra information present in the object display is not relevant to the integration task. If the decision statistic can be specified at the time of display design, an augmented bar display may be appropriate since it offers good performance for both separate and integral tasks; if the decision statistic cannot be specified at the time of display design, the use of an object display may hinder performance if the decision statistic and emergent feature are not correlated.     

从工业设计角度探讨展示设计的体验识别

随着社会意识的进步,人性自身的价值受到广泛关注,在展示馆,参观者不应仅仅是所展示信息的被动接受者,参观者在展示空间中与展品如何产生互动,并形成良好的体验识别,从而达到展示信息的主动接收,成为了今后展示设计的发展趋势。本文从工业设计角度来探索宽泛意义上的展示设计,并从主题性、互动性、认知性、人性化、和丰富性五个方面来探讨展示设计的体验识别。     

基于机群的拼贴显示系统的软件结构

利用计算机系统控制多个图形部件,驱动多个投影仪得到基于投影拼贴的显示,是突破现有显示技术制约,实现千万像素以上的高清晰度大尺寸显示的有效手段。目前采用PC机群系统来驱动拼贴显示系统的方式由于其较高的性能价格比正日益成为主流的选择,但是这种实现方式同时需要更复杂的分布式显示软件的支持。该文分析比较了几种基于机群的拼贴显示系统的软件结构并在此基础上提出了一种新的适合并行程序环境的软件接口。     

显示器件综述

近年来显示器件的发展十分迅速,种类繁多,除用于计算机终端显示外,采用计算机编程的大屏幕显示已广泛使用。为了解各种显示器件的性能和在系统中采用适合的显示器件,简要地介绍几种常用的显示器件的基本结构,工作原理及其特点和发展概况,以供读者参考。     

Modeling the cognitive content of displays

An approach for measuring the cognitive complexity of visual displays is discussed and applied to a dynamic display of avionic information. A semantic network formalism is used to model two interrelated knowledge systems, world knowledge and display knowledge. The information the operator receives during training about the general display format characteristics and the task requirements, along with other previously stored information, constitutes world knowledge. The semantic content of a particular configuration of information encountered during task performance constitutes display knowledge. Four orthogonal predictor measures of cognitive complexity were derived from the networks. In an experiment three of the orthogonal predictors were significantly correlated with task performance. After averaging across operators, the three significant predictors accounted for 99% of the variation of display effectiveness. Results indicate that a model of cognitive complexity based on a semantic network formalism may provide a useful technique for quantitatively evaluating the quality of competing display format concepts.     

High aspirations for the programmable gallery

Computers and network technology could revolutionize how museums display information about space science discoveries. Visualization stations are the core of the programmable gallery. Each of these stations consists of a large graphics display and computer, and a smaller text display and computer     

OLED显示技术在智能仪表上的应用

为适应显示技术的发展,采用了OLED显示屏作为智能仪表的显示终端。本文介绍了OLED显示屏的驱动方式,并对低功耗MSP430F1611芯片做了简单的说明。重点阐述了OLED驱动芯片SSD0323和单片机的接口电路以及低功耗情况下系统的供电方法,并给出了相应的软件流程图。该设计成功地在低功耗条件下驱动显示屏,通过就地组态,可同时进行多参数的显示。     

罗盘刻度线反走样快速绘制算法的改进研究

现代飞机座舱显示系统正向着综合化方向发展，飞机参数向飞行员的传递越来越依赖于图形显示。罗盘画面是该显示系统中的重要画面之一，它要求罗盘不扭曲、不闪烁、不截图。针对这些情况，在软件算法上为罗盘画面的实现采取了一些措施，提出了刻度线的快速反走样算法。该算法适用于任何直线的反走样绘制，且速度快。     

Design of autostereoscopic two‐view 3D that uses the spherical concave surface and the parallax barrier

Autostereoscopic display where circular concave display was used was investigated in case of the parallax barrier and two‐view 3D. Equation of the barrier pitch of the parallax barrier was derived that depended on the radius of the curved display. Trajectories of the rays coming from the curved display through the parallax barrier were calculated. Calculated distribution of ray trajectories for the autostereoscopic display using curved display showed trends similar to those for the flat display.     

Toward the light field display: autostereoscopic rendering via a cluster of projectors

Ultimately, a display device should be capable of reproducing the visual effects observed in reality. In this paper we introduce an autostereoscopic display that uses a scalable array of digital light projectors and a projection screen augmented with microlenses to simulate a light field for a given three-dimensional scene. Physical objects emit or reflect light in all directions to create a light field that can be approximated by the light field display. The display can simultaneously provide many viewers from different viewpoints a stereoscopic effect without head tracking or special viewing glasses. This work focuses on two important technical problems related to the light field display; calibration and rendering. We present a solution to automatically calibrate the light field display using a camera and introduce two efficient algorithms to render the special multi-view images by exploiting their spatial coherence. The effectiveness of our approach is demonstrated with a four-projector prototype that can display dynamic imagery with full parallax.