Short Texts Classification Through Reference Document Expansion

With the rapid development of information technology, short texts arising from socialized human inter- action are gradually predominant in network information streams. Accelerating demands are requiring the industry to provide more effective classification of the brief texts. However, faced with short text documents, each of which contains only a few words, traditional document classifi- cation models run into difficulty. Aggressive documents expansion works remarkably well for many cases but suf- fers from the assumption of independent, identically dis- tributed observations. We formalize a view of classification using Bayesian decision theory, treat each short text as ob- servations from a probabilistic model, called a statistical language model, and encode classification preferences with a loss function defined by the language models and the ex- ternal reference document. According to Vapnik＇s meth- ods of Structural risk minimization （SRM）, the optimal classification action is the one that minimizes the struc- tural risk, which provides a result that allows one to trade off errors on the training sample against improved gener- alization performance. We conduct experiments by using several corpora of microblog-like data, and analyze the ex- perimental results. With respect to established baselines, results of these experiments show that applying our pro- posed document expansion method produces better chance to achieve the improved classification performance.     

基于地理信息的电力通信资源管理

近年来,随着电力通信网的快速发展,网络规模越来越大,业务种类不断增加,结构日趋复杂,电力通信网尤其是光纤通信网已经成为天津电网不可缺少的重要组成部分。如何提高电力通信网建设与运行维护水平,建立高效的通信资源管理系统,已经成为迫切需要解决的问题。本文以基于地理信息系统和动态网页制作技术的电力通信基础资料管理为题,深入研究了电力通信资源管理系统的主要功能、制作流程和实现方法。该套管理系统的实际从整体提高了对电力通信网的维护管理水平,对于电力通信未来发展具有重要意义。     

基于视音频实时预览技术的广电云移动存储平台设计

无线互联网全面覆盖,智能手机、平板电脑等移动互联网终端不断普及,预示着移动互联网时代的来临。广电行业正处在传统媒体和新兴媒体加速融合期,依托移动互联网实现办公应用和节目生产的需求日益迫切。本文通过剖析广电云存储平台建设的实际案例,论述了移动互联网时代,如何应对广电行业视音频大数据的分享和存储,如何随时随地分享数据信息的手段和方法。     

一种基于复数域微分的资料同化新方法

提出了一种基于复数域微分的资料同化新方法. 针对变分资料同化中目标泛函梯度计算复杂和精度不高的问题, 首先利用复变量求导法把梯度分析过程转化为复变泛函的数值计算, 进而高效和高精度地获得梯度值; 然后结合经典的最优化方法, 给出了非线性物理系统资料同化问题的新求解算法; 最后对典型混沌系统和包含“开关”现象的单格点比湿发展方程进行了资料同化数值实验, 结果表明新方法能非常有效地估计出非线性动力预报模式的初始条件. 关键词： 资料同化 复数域微分 非线性物理系统 梯度分析     

公司资源

《0201微组装无铅焊接工艺及可靠性》,《2007 SMT适用标准集》，《IPC-A-610D电子组件的可接受性（中文版）》,《无铅焊接应用标准》（2）,电子行业防静电技术资料（中外标准汇编）.     

兰州重离子加速器冷却储存环

 兰州重离子加速器(HIRFL)由用作注入器的扇聚焦回旋加速器(SFC)和分离扇回旋加速器(主加速器SSC)组成,是加速中、低能重离子束流的回旋加速器系统.     

备份S308码片资料的方法

更新S308手机软件时。为保留原机内资料，刷机前需做好资料备份。以便刷完后将资料写回原机内。备份方法如下：     

透射全息资料存储

文章在简述了透射全息图基本原理的基础上，对于透光率不高的原稿，正反面都做出了比较清晰、对比度较高的再现像，成功地实现了对纸面文字资料的存储。