数据仓库技术在放射性监测系统中的应用研究

针对目前核辐射安全防护还停留在基于以事务处理为主的数据库管理系统之上的传统数据分析，文章提出了在放射性监测系统中建立以分析处理为主的数据仓库体系化环境。初步设计了系统的总体框架，完成了数据仓库的建模过程。重点在于确定主题、粒度划分和多维数据模型的确立。同时运用数据挖掘工具对其数据进行模式和知识的发现。     

Improved Redundant Picture Coding Using Polyphase Downsampling for H.264

This paper presents an improved redundant picture coding method that efficiently enhances the error resiliency of H.264. The proposed method applies polyphase downsampling to residual blocks obtained from inter prediction and selectively encodes the rearranged residual blocks in the redundant picture coding process. Moreover, a spatial‐temporal sample construction method is developed for the redundant coded picture, which further improves the reconstructed picture quality in error prone environments. Simulations based on JM11.0 were run to verify the proposed method on different test sequences in various error prone environments with average packet loss rates of 3%, 5%, 10%, and 20%. Results of the simulations show that the presented method significantly improves the robustness of H.264 to packet loss by 1.6 dB PSNR on average over the conventional redundant picture coding method.     

一种色度瞬态改善算法及其实现

介绍了数字电视中用来增强图像画质的一种常用方法——色度瞬态改善(CTI)。介绍了该方法的基本原理、常用算法和三星公司提出的一种新算法，并讨论了该算法的硬件实现方案和代价。     

医学图像归档与通信系统的设计方案

分析与综述了医学图像归档与通信系统（PictureArchivingandCommunicationSystem，简称PACS的研究状况，提出了适用于国内医院的PACS设计方案，并对建立国内PACS的著于问题进行了探讨．实践表明该系统设计合理，通用性强，适合国内医院现代化管理的要求．     

Initial condition for evolution of the perturbative QCD Pomeron in a nucleus

We show that subdominant terms obtained using the reggeized gluon diagram technique, which should be added to Pomeron fan diagrams with the triple-Pomeron interaction, can be taken into account exactly if the initial condition for the evolution is chosen in the Glauber form. This demonstrates the complete equivalence of the dipole picture and the reggeized gluon technique in the high-energy limit not only in the leading order but also in the next order. __________ Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 148, No. 1, pp. 57–63, July, 2006.     

简并部分解除情况下的二阶微扰修正

通过对一般情况下简并态的二阶微扰修正，澄清目前在简并微扰论中尚存的一些模糊认识。     

数字电视的进展

数字电视采用先进的信源压缩编码技术以及先进的数字传输技术。它具有很多新颖的特性，因而将有广泛的应用前景。新的数字电视体系正在诞生；它在继承现有模拟电视技术的基础上，将逐步取代现在的模拟电视体系。     

偏转线圈彗差校正系统分析

本文对彩色显像管偏转线圈用两种六极场彗差校正系统进行了分析讨论，对垂直偏转场参量Ｖｏ，Ｖｚ的测量结果表明六极场校正系统的引入在偏转线圈颈部形成垂直枕形场有利于彗差的校正。同时，文中还对磁八极场对彗差的校正作用进行了分析。     

信号侦察中的跳频信号识别方法

为了解决跳频设备已经大量装备而对跳频信号的侦察识别仍然困难的问题,作者提出了两种跳频信号识别方法,包括最大相关处理法和时间相关统计法.在对跳带内的信号进行数字信道化处理后,再经过最大相关处理,时-频图上的跳频信号的分布情况将会变得非常清晰;时间相关统计法是充分利用跳频信号在时间上的断续性和每跳间的连续性来识别跳频信号.经过实验验证,上述两种识别方法的使用,在跳频信号的侦察识别上效果非常明显.     

A Thomas-Fermi type picture and the electromagnetic structure of the nucleon

Using a Thomas-Fermi type picture of the nucleon as a dense system of quarks and antiquarks, we give a rationale for the ‘dipole’ nature, scaling and other characteristics of the nucleon electromagnetic form factors. Similar considerations are then given for the electromagnetic structure of the pion.