MGLS240128T型LCD在配电变压器智能保护装置中的应用

本文首先介绍香港精电公司生产的内置T6963C控制器型中规模图形液晶显示模块MGL，S240128T的基本电路特性和基本软件特点。然后，详细讨论该模块在基于DSP技术的WSB2000型变压器智能保护装置中的硬件接口和软件设计。该装置是针对城乡电网配电系统10kV、6kV配电变压器的保护设计，由于引入了液晶显示不但确保了该装置保护的先进性、实时性和可靠性，而且实现了信息显示清晰、直观、快速、交互性强等技术特点。     

LCD在基于DSP的智能保护装置中的应用

文章介绍了内置T6963C控制器型中规模图形液晶显示模块MGLS240128T的基本电路特性和基本软件特点,讨论了该模块在基于DSP技术的WSB2000型变压器智能保护装置中的硬件接口和软件设计。该装置针对城乡电网配电系统10kV、6kV配电变压器保护设计,引入了液晶显示。     

点阵式LCD在新型微处理器线路保护装置中的应用

首先介绍了内置T6963控制器的图形液晶显示模块MGLS240128T的电路特性和基本功能,然后结合该模块在新型微处理器线路保护装置中的作用,给出其硬件接口电路并介绍了软件设计要点。在新型微处理器线路保护装置中利用液晶显示可实现信息显示的直观化和清晰化,体现了人机交互的快速性等技术特点。     

内藏液晶显示控制器T6963C与DSP的接口应用

点阵式液晶显示模块具有性能稳定、适合应用于便携式智能仪器仪表等特点,是一种较低价位、具有较高显示功能的显示器件。文中介绍了内藏液晶显示控制器T6963C的液晶显示模块的特点及其显示方式。在此基础上,给出了该液晶显示模块与基于DSP(数字信号处理器)TMS320LF2407A的嵌入式系统的硬件接口电路和部分C语言代码。最后,实现了该液晶显示模块在TMS320LF2407A的嵌入式系统中的液晶显示功能,成为该现场温度监控系统的重要组成部分。其程序与硬件逻辑图也可为其他DSP系统提供参考。     

基于T6963C控制器的液晶模块显示技术

介绍了基于T6963C控制器的液晶显示模块的硬件结构、特点和使用方法以及单片机控制下的硬件接口电路;叙述了T6963C的状态字和指令集在软件编程中的作用和特点,说明了基于该控制器的液晶显示模块图形方式下的字符汉字显示技术。     

配电变压器经济运行分析在智能保护装置中的实现

文章以如何在配电变压器智能保护装置中实现经济运行分析为例 ,提出了通过在变压器智能保护装置中引入经济运行分析。该方法一方面使每台变压器的运行状态可视化 ,另一方面利用智能保护装置的远程通信功能将相关的分析数据上传给更高级的监控中心 ,为实现对全网变压器运行状态的统一考核与统一管理奠定下良好的技术基础     

基于T6963C控制器的8051编程宏

随着液晶显示技术的发展,液晶显示模块的应用越来越广泛。主要介绍基于T6963C控制器的液晶显示模块MGLS240128T的配置、特点以及T6963C控制器的指令系统,在此基础上结合实际应用,给出了关于标志字读、无参数写指令、单参数写指令、双参数写指令以及读数据等几个常用的8051编程宏,具有较强的实用价值。     

基于C51的单片机控制LCD驱动器设计

以液晶显示技术的发展为背景,选择了比较常用的T6963C内置控制器型图形LCD(液晶显示器)模块,从应用角度介绍了该控制器的特点和基本功能,并描述了单片机控制T6963C LCD模块的显示机理。在此前提下以C51硬件开发语言为基础,给出了8051单片机与T6963C的接口电路框图,并以字符、图形的具体显示方法为例简要介绍了软件的设计流程及实现。     

基于FPGA的图形点阵液晶显示模块的应用设计

提出了一种基于FPGA和T6963C模块来控制液晶显示的实现方法,介绍了液晶显示控制器T6963C的性能特点,给出了FPGA与液晶显示屏WG240128B的硬件接口电路、软件设计流程和液晶显示程序。     

浅析T6963C液晶显示模块与PIC单片机的接口技术

介绍了基于T6963C液晶显示模块的基本特性及其与PIC单片机的接口方法。通过分析PIC单片机的时钟与指令周期关系和T6963C对MCU／MPU时序的要求,得出了基于T6963C液晶显示模块与PIC单片机接口方法,并给出了以单片机PIC16F74为例的软硬件实现方法。     

Dynamic power management in Wi-Fi Direct for future wireless serial bus

This paper presents a performance analysis of Wi-Fi Direct power management schemes and exploits their problems to design a novel, enhanced power management for future wireless USB (WSB) applications. Wi-Fi Direct will become a key technology for the support of future WSB services that require high standards of service quality and power efficiency at the same time. To provide this, Wi-Fi Direct defines two power management schemes, opportunistic power save mode and notice-of-absence. Even though each scheme has its own characteristics and advantages, specification does not have any definition of how to select the schemes and its parameters based on the type of WSB application being serviced. We analyze the properties of the two power management schemes of Wi-Fi Direct, and discover that their performance can greatly vary depending on the number and type of WSB applications that is being transmitted in the network. To solve this problem, we propose a novel power saving algorithm that can dynamically change the power management of Wi-Fi Direct. Our work is extensively evaluated using the Wi-Fi Direct module implemented in the NS-3 simulator.     

Effects of JPEG2000 data compression on an automated system for detecting clustered microcalcifications in digital mammograms.

The functionalities of the JPEG2000 standard have led to its incorporation into digital imaging and communications in medicine (DICOM), which makes this compression method available for medical systems. In this study, we evaluated the compression of mammographic images with JPEG2000 (16 : 1, 20 : 1, 40 : 1, 60.4 : 1, 80: 1, and 106 : 1) for applications with a computer-aided detection (CAD) system for clusters of microcalcifications. Jackknife free-response receiver operating characteristic (JAFROC) analysis indicated that differences in the detection of clusters of microcalcifications were not statistically significant for uncompressed versus 16: 1 (T = -0.7780; p = 0.4370), 20 : 1 (T = 1.0361; p = 0.3007), and 40 : 1 (T = 1.6966; p = 0.0904); and statistically significant for uncompressed versus 60.4 : 1 (T = 5.8883; p < 0.008), 80 : 1 (T = 7.8414; p < 0.008), and 106 : 1 (T = 17.5034; p = < 0.008). Although there is a small difference in peak signal-to-noise ratio (PSNR) between compression ratios, the true-positive (TP) and false-positive (FP) rates, and the free-response receiver operating characteristic (FROC), figure of merit values considerably decreased from a 60 : 1 compression ratio. The performance of the CAD system is significantly reduced when using images compressed at ratios greater than 40 : 1 with JPEG2000 compared to uncompressed images. Mammographic images compressed up to 20 : 1 provide a percentage of correct detections by our CAD system similar to uncompressed images, regardless of the characteristics of the cluster. Further investigation is required to determine how JPEG2000 affects the detectability of clusters of microcalcifications as a function of their characteristics.     

Systematic Tracking of the Random Movement of a Mobile in Cellular Mobile Network

In wireless networks we evaluate the distance of a mobile from its base station and from other base stations in some neighboring cells to estimate a channel and also to measure interference caused by a co-channel. In this paper a systematic tracking of the random movement of a mobile is presented. In this work we find the position of any mobile at any point of time within its complete call duration. Using this model not only we can locate the mobile but also can find the distance of any mobile from the base station of the same cell and also when they belong to different cells. Such a model seems to be very promising in giving a platform to study the performance of HCA/FLCA and DCA like advanced channel allocation techniques. H. K. Pati received his MCA degree from UCE. Burla, under Sambalpur University, India, in 1998. Then he received his ME degree in computer science and engineering from REC Rourkela, India (now named as NIT Rourkela, India) in 2000. Since 2000 he has been working as a PhD student in the CSE Department IIT Kharagpur, India. Since September 2005 he is also associated with the Department of Computer Science, Trinity College, University of Dublin, Dublin 2, Ireland as a research staff (Postdoctoral research fellow). His current research focus is on quality of service provisioning in personal wireless communications.     

IMT-2000的网络结构、相关规定及关键技术

ＩＭＴ－２０００是国际电联（ＩＴＵ）对第三代移动通信系统的统称。本文介绍了ＩＭＴ－２０００的基本概念、网络结构，ＩＴＵ的标准化工作、相关规定，ＩＭＴ－２０００的无线技术以及第三代移动通信的一些最新发展。     

Taking the challenge of multiple access for third-generationcellular mobile radio systems-a European view

In Europe, the challenge of the design of third-generation cellular mobile radio systems has been taken numerous research and development activities in this field have been started. The authors try to give an overview of the European activities in this field. The article is organized in two parts. In the first part, the requirements for third-generation cellular mobile radio systems such as Universal Mobile Telecommunications System (UMTS) and Future Public Land Mobile Telecommunications System (FPLMTS), which has been named International Mobile Telecommunications after the year 2000 (IMT-2000) are presented concisely. Also, the importance and challenge of the multiple access design for such third-generation cellular mobile radio systems is explained. In the second part, numerous European research activities with focus on the multiple access design for third-generation cellular mobile radio systems are reviewed     

硅烷处理PDP基板玻璃的关键工艺

用硅烷偶联剂对PDP的上基板玻璃进行预处理能有效改善上板电极的线宽，提高显示屏的发光效率。本文对预处理过程中的各种关键工艺进行详细介绍。     

HDTV接收机芯片中的屏幕显示单元设计

介绍了用于高清晰度电视(HDTV)接收机芯片中的视频后处理屏幕显示单元，实现了在监控系统中加入屏幕显示信息(包括节目表、节目信息、频道选择信息等)，重点介绍了实现该功能的硬件设计。     

Preparation of TiO2 paste starting from organic colloidal suspension for semi-transparent DSSC photo-anode application

We investigated the effect of different formulation strategies on the preparation of TiO2 screen printable pastes starting from the same organic colloidal suspension for dye-sensitized solar cells (DSSCs) application. As first strategy, we developed TiO2 pastes starting from nano-crystalline powder dried from the synthetized suspension, with and without an additional acid treatment, obtaining non-transparent scattering sintered layers. Instead, we demonstrate that starting from the sol solution is a key factor to obtain a well nano-dispersed TiO2 paste. The novel paste process resulted in a final homogeneous and semitransparent porous layer (T>80% @450–550 nm). In order to evaluate the properties of TiO2 powders and inks we performed thermal analysis, BET and FTIR measurements. The films were screen printed on FTO (fluorinedoped tin oxide) glass and characterized after sintering via profilometry, FE-SEM analysis and UVVis spectra measurements. The photo-anode was further validated in small (2 cm2) and large (90 cm2) active area DSSCs, giving an average photovoltaic efficiency respectively of 5,22% and 2,39%, comparable with commercially available TiO2 paste with similar composition.