数码监控系统的常见故障及排除

简要介绍数码监控设备工作原理,及常出现的故障,分析原因,探讨解决问题的方法.     

BOOM BOX遥爆系统中继模式的应用

文章是以山西沁水县郑庄二维山地项目为基础,并结合以往所使用BOOM BOX遥爆系统普通模式施工中存在的缺陷,对BOOM BOX遥爆系统中继模式施工的优点进行分析论述。     

梯状光纤延迟线编解码器的设计与实现

梯状光纤延迟线编解码器是各类延迟线编解码器中最有前途的一种。文章就其设计方法进行了详细的分析和讨论，并着重分析了其中光纤耦合器的最佳耦合因子的设计。将不同情况下的耦合因子对自相关峰值和旁瓣抑制比的影响作了比较。研究表明，要实现正确的解码，各点的最佳耦合因子应使旁瓣抑制比和自相关峰值达到最大。据此设计的编解码器具有良好的性能。     

FRACTAL BLOCK CODING IN RESIDUE DOMAIN

A new block-based fractal image coding algorithm called Fractal Block Coding in Residue Domain (FBCRD) is proposed. In basic Fractal Block Coding (FBC) algorithm, each block (called range block) is encoded by an affine mapping from a domain block within the same image to itself. The decoder uses the parameters of these mappings to synthesize the reconstructed image through an iterative procedure. FBCRD is a modification of basic FBC. In FBCRD, range blocks and domain blocks are all residue blocks subtracted from their block means and both the parameters of affine mappings and block means are coded. This modification leads to fewer iterations at the decoder. An optimized decoding strategy is also introduced which reduces total decoding time by more than half of that of basic FBC. This improvement is favorable for real time implementation of fractal image compression. Supported in Part by the Defence Preresearch Foundation, the National Science Foundation of Guangdong Prooince and the National “Chinbing” Project     

H.265解码器去块滤波并行化设计与性能优化

H.265继续沿用H.264编码架构,去方块滤波器也是H.265视频编码标准的一个重要选项,去除混合编码带来的块效应极大改善了视频的质量,但由于H.265超级宏块的存在,去方块效应滤波相关参数层层嵌入在每个小的处理单元中,这种结构不利于实现基于宏块行间的并行化,同时也很难高效地利用Cortex-A9架构SIMD优化性能.首先详细分析H.265标准去块滤波器的处理过程以及并行处理的困难,进而提出一种便于实现基于宏块行间的并行去块滤波结构,然后进行Cortex-A9汇编优化.基于HM14.0实验,改进去方块效应滤波器计算复杂度从占整个解码器25％降至14％,大大提升了解码器性能,为移动设备上实现H.265大分辨率视频实时播放奠定基础.     

汽车解码器使用性能的研究

在汽车故障诊断中得到广泛应用的解码器,具有读取、提取、记录、显示储存在汽车电脑中的多种信息的功能.但是,解码器的上述性能将受到被诊对象、自身缺陷、测试数据、测试模式、故障类别、通讯方式、软件以及车型数据卡等方面因素的影响,有些因素限制了解码器的使用性能,有些因素扩展和延伸了解码器的使用性能.而只有对上述各种情况正确地理解和掌握,才可真正地在汽车故障诊断中准确地运用这一新型诊断工具.     

Design and simulation of a nanoelectronic single electron 2-4 decoder using a novel simulator

The design and simulation of a single-electron 2-4 decoder using a novel single electron circuit simulation tool named single-electron circuit simulator (SECS), is presented in this paper. In single electron circuits bits of information are represented by the presence or absence of single electrons at conducting or semiconducting islands. SECS utilizes the Monte Carlo method and the change in free-energy of the whole circuit determines the tunnel rates of possible tunnel events, providing thus a real time simulation of any arbitrary single-electron circuit. Furthermore, SECS is using the SPICE interface for schematic capture. SPICE models of single-electron circuit structures have been developed and, therefore, SECS can also be used for the design and simulation of hybrid microelectronic—single-electron circuits.     

电话遥控装置的设计

利用双音多频电话机，对异地十路电压的开启、关闭和查巡控制装置进行设计和研制，该装置具有投入成本低，维持费用少，操作简便，密码易更改，保密性能好等优点。本文还对电路的工作原理进行了较为细致的分析。     

高速单片12位D／A转换器电路设计

本文描述了一种全扩散型高速单片１２位Ｄ／Ａ转换器集成电路ＣＤＡ６０１２的设计。该Ｄ／Ａ转换器集成电路由于采用了一种独特的分段式及主－从梯形网络的设计方法，在不需要精密的薄膜电阻及激光修正技术的情况下达到了１２位的分辨率。它提供了高达１３位的单调性和微分线性度，全量程的稳定时间为２５０ｎｓ，电源电压为±１８Ｖ范围，在电源电压为＋５Ｖ和－１５Ｖ时功耗可低至２３０ｍＷ左右。     

综合接收解码器EPG系统

文中提出基于音视频解码器上的EPG(Electronic Program Guide,电子节目指南)系统的实现方案,阐述系统的人机交互技术原理,提出利用双向链表来构造EPG中各种信息流的方法,提高系统的处理速度和运行效率.