Visual evaluation at scale of threshold to suprathreshold color difference

Visual evaluation experiments of color discrimination threshold and suprathreshold color‐difference comparison were carried out using CRT colors based on the psychophysical methods of interleaved staircase and constant stimuli, respectively. A large set of experimental data was generated ranged from threshold to large suprathreshold color difference at the five CIE color centers. The visual data were analyzed in detail for every observer at each visual scale to show the effect of color‐difference magnitude on the observer precision. The chromaticity ellipses from this study were compared with four previous published data, of CRT colors by Cui and Luo, and of surface colors by RIT‐DuPont, Cheung and Rigg, and Guan and Luo, to report the reproducibility of this kind of experiment using CRT colors and the variations between CRT and surface data, respectively. The present threshold data were also compared against the different suprathreshold data to show the effect of color‐difference scales. The visual results were further used to test the three advance color‐difference formulae, CMC, CIE94, and CIEDE2000, together with the basic CIELAB equation. In their original forms or with optimized K_L values, the CIEDE2000 outperformed others, followed by CMC, and with the CIELAB and CIE94 the poorest for predicting the combined dataset of all color centers in the present study. © 2005 Wiley Periodicals, Inc. Col Res Appl, 30, 198–208, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/col.20106     

Thinned-ECOC ensemble based on sequential code shrinking

Error-correcting output coding (ECOC) is a strategy to create classifier ensembles which reduces a multi-class problem into some binary sub-problems. A key issue in designing any ECOC classifier refers to defining optimal codematrix having maximum discrimination power and minimum number of columns. This paper proposes a heuristic method for application-dependent design of optimal ECOC matrix based on a thinning algorithm. The main idea of the proposed Thinned-ECOC method is to successively remove some redundant and unnecessary columns of any initial codematrix based on a metric defined for each column. As a result, computational cost of the ensemble is reduced while preserving its accuracy. Proposed method has been validated using the UCI machine learning database and further applied to a couple of real-world pattern recognition problems (the face recognition and gene expression based cancer classification). Experimental results emphasize the robustness of Thinned-ECOC in comparison with existing state-of-the-art code generation methods.     

一种基于单片机的全自动超级过滤系统的设计

阐述了全自动超滤控制系统的组成和功能，在超滤系统设计中采用了ＭＣＳ５１单片机，使整个超滤系统实现了自动顺序控制。     

基于LabVIEW的远程数据采集终端通信接口的设计与实现

对LabVIEW的串行通信接口驱动进行了研究,对用VISA编程进行了初步的尝试,设计并实现了基于LabVIEW的上位机控制程序,以及基于MCS-51单片机控制的数据采集终端的数据存储与控制,完成了基于8051单片机的远程数据采集终端的上位机串口通信接口部分程序,并且通过了测试.     

皮带打滑检测保护装置的设计

介绍了一种能够实现皮带打滑故障检测及保护的装置,该装置的核心部分采用MCS-51单片机控制.该装置通过接近开关来产生脉冲信号,由单片机进行计数,按实际要求做出相应的继电器动作输出和模拟量输出.通过LED显示它的实时转速值,通过按键选择显示瞬时速度值以及事先设定的速度值.     

移动群智感知中原始数据隐私保护算法

随着移动智能设备的普及，移动群智感知（MCS）得到广泛应用的同时面临着严重的隐私泄露问题。针对现有的移动群智感知中的原始数据隐私保护方案不能抵御共谋攻击，降低了感知数据可用性的情况，提出一种基于移动节点的数据隐私保护算法（DPPMN）。首先，使用DPPMN中的节点管理器建立在线节点列表并将其发送给源节点，源节点通过列表构建数据传输的匿名路径；然后，使用paillier加密方案加密数据；接着，将密文沿路径上传至应用服务器；最后，服务器解密密文得到所需的感知数据。在数据传输时使用加解密操作，确保了攻击者不能窃听感知数据的内容，且无法沿路径追溯数据的来源。DPPMN能保证应用服务器在不侵犯节点隐私的情况下访问原始数据。理论分析和实验结果表明，DPPMN在增加适当通信量的情况下，具有较高的数据安全性，可以在抵御共谋攻击的同时不影响数据的可用性。     

用MCS-51单片机实现拨轮扶推式投球机自动投球

首创以MCS－51单片机为控制核心，外加测温电路，使拨轮扶推式投球机能够依据管道温度，自动改变投球间隔时间，实现自动投球，又可根据需要手动投球，具有一定的可靠性、实用性。     

MCS系统精调优化调节品质

详细阐述了广安电厂2×300 MW机组DCS系统模拟量控制系统(MCS)系统完善化调试(简称精调)的必要性、目的和意义,介绍了几个主要系统的调试方法、步骤及取得的效果,可为MCS系统的组态、设计、调试和优化提供借鉴和参考.     

准分离或伴音系统和BTSC电视多路伴音接收机设计与实践

电视拦收机为获得高质量的立体声和双伴音,必须设法降低系统动态噪声和内载波蜂音。本文在分析了现行电视机中产生内载波蜂音的原因之后,介绍了准分离式伴音系统原理和应用单片Zenith-dbx解码集成电路设计的BTSC制式电视多路伴音接收机。     

单片机晶闸管触发电路及程序设计方法

阐述了用8031单片机构成晶闸管触发电路的结构及特点,提出了一种为六只晶闸管提供触发脉冲的方法及用8031单片机实现此方法的具体步骤。图3幅,表2