中铁二十三局

重庆鱼洞长江大桥为公路、城市轻轨两用大跨度连续刚构桥,在世界桥梁建设中尚属首例:重庆鱼洞长江大桥悬灌梁段最重达510t,施工挂篮重达180t等多项指标创国内同类桥梁纪录:重庆鱼洞长江大桥创造了一次浇筑桥梁零号段1600m3超大体积混凝土等多项我国桥梁施工的     

多媒体教学系统中数据压缩方法的研究

如何在网络上实时地传输图像一直是网络数据传输的难点,作者简单介绍了无损数据压缩中的游程编码和帧间编码,然后提出一种游程编码和帧间编码相结合的混合编码数据压缩方法,实现了网络图像传输中对大量图像数据的快速、高效压缩。     

人行钢箱梁桥设计参数的初步研究

在初步设计阶段,为了快速匡算人行钢箱梁桥的梁高及跨径、横隔板间距、防脱空支座间距等关键设计参数,采用Midas Civil建立如下模型:不同跨径和梁高的动力分析模型、不同横隔板间距下的第二体系受力梁格模型、包含人群荷载最不利加载位置的整体模型。分析表明,在梁宽及顶底板厚度不变的情况下,频率与梁高呈正线性相关,与跨径的二次方呈负线性相关;人行桥钢箱梁横隔板间距可以近似取3倍箱梁高度且不大于6 m;简支梁桥支座间距可以取b=(0. 25～0. 3) B,而对于连续梁桥,需大于简支梁要求的支座间距(经过试算后确定)。     

Clinical Detection and Feature Analysis on Neuro Signals

Research on neuro signals is challenging and significative in modern natural science. By clinical experiment, signals from three main nerves (median nerve, radial nerve and ulnar nerve) are successfully detected and recorded without any infection. Further analysis on their features under different movements, their mechanics and correlations in dominating actions are also performed. The original discovery and first-hand materials make it possible for developing practical neuro-prosthesis.     

A STUDY ON LIMITATION OF HIGH-ENERGY SHOCK WAVE-INDUCED RENAL DAMAGE BY SALVIA MILTIORRHIZAE INJECTION IN RABBIT MODEL

Extracorpealshockwavelithotripsy (ESWL)isanoninvasive ,almostpain freestandardtreatmentmodalityforurolithiasis.However ,ESWLisnotcompletelyfreeofsideeffect.Apartfromlocalhematomasanda potentialriskforhypertensionchanges,alterationsinkidneyfunctionhavebeenreported .SalviaMiltiorrhizaehasthe propertyofpromotingbloodcirculationandresolvingbloodsta sis.Thisstudywasinitiatedtoinvestigatethepo tentialprotectivefunctionofSalviaMiltiorrhizaeeagainsthigh energyshockwaveinducedrenaltoxi city .MATE…     

Experimental Investigation on Contribution of CFRP Attachment to Durability of Reinforced Concrete Structure Subjected to Chloride Attack

The function of externally-bonded carbon fiber reinforced polymer （CFRP） in preventing chloride from entering into concrete is verified by experiment. The results show that externally-bonded CFRP can be considered as a part of corrosion prevention system of strengthened concrete structures subjected to chloride ingress, and the contribution of CFRP should be considered in evaluation of durability of reinforced concrete structures with externally-bonded CFRP. With the effective shielding function of CFRP considered, an equation for residual lifetime prediction of concrete structures with externally-bonded CFRP is derived from Fick＇s dispersion law. CFRP has two functions for coastal concrete structures, including strengthening and increasing durability as part of corrosion prevention system.     

基于Onuris线阵列CCD摄像技术的高速电气化铁路接触网动态检测系统

本文对基于Onuris线阵CCD摄像技术的高速电气化铁路接触网动态检测系统的检测原理、系统结构、软件设计进行了介绍，为高速电气化铁路接触网检测提供了一种新的高科技手段。     

我区首批世行贷款修建公路经济评估简介

我区第一批世行贷款修建了7条农村公路，通过修建公路项目的实施，提出就农村公路而言，世行贷款农村公路管理程序和方法的核心是项目经济评估和合同管理。     

力控组态软件在蓄能空调监控系统中的应用

在分析蓄能空调监控系统功能的基础上，利用力控组态软件强大的HMI（人机界面接口）/SCADA（监控和数据采集），开发了一个界面直观、功能齐全的监控系统，实现蓄能空调工况的自动切换，供水温度的恒定控制，设备的远程操作和管理以及系统运行情况的动态显示等功能。