海口世纪大桥斜拉索锚固区光弹性应力分析

由于拉索功固区形状复杂，受力较特殊，本文采用三维光弹性冻结法，对拉索锚固区进行了应力分析，给出了锚固区应力场分布，为正确地配置钢筋提供了可靠的依据。     

The Implementation of Mirror-Image Effect in MPEG-2 Compressed Video

Straightforward techniques for spatial domain digital video editing (DVE) of compressed video via decompression and recompression are computationally expensive. In this paper, a novel algorithm was proposed for mirror-image special effect editing in compressed video without full frame decompression and motion estimation.The results show that with the reducing of computational complexity, the quality of edited video in compressed domain is still close to the quality of the edited video in uncompressed domain at the same bit rate.     

动车组吊装结构及联接螺栓接触非线性有限元分析

以某动车组制动模块为研究对象,采用空间六面体单元和四节点壳单元混合建模的方式,对整体吊装结构进行8种工况的接触非线性有限元分析,得出制动模块各零部件静强度满足设计要求.利用子结构技术,对吊座螺栓进行不同预紧力情况下的应力强度对比研究,得出预紧力是影响螺栓强度的主要因素,随着预紧力的增加螺栓上的应力值逐渐增大.     

A Novel Method for Detection and Removal of Line Scratch in High Resolution Digital Film

Introduction For at least one decade a need for automaticrestoration of degraded film has been growing.The classical film restoration is based on specialcopying machines to improve the quality of safe-keeping copies.However,such techniques do notpermit the removal of all kinds of degradations be-cause the unit of manipulation is always the physi-cal filmstrip.With the help of digital imagesequence's processing techniques the restorationprocess can be adapted for each frame,each pixeland also f…     

A Novel Automatic Method for Removal of Flicker in Video

Intensity flicker is a common form of degradation in archived film. Most algorithms on this distortion are complicated and uncontrolled. This paper presented a discrete mathematical model of flicker, designed a block-based estimation method of the model＇s parameters according to their features of intensity variation in large area. With this estimation result it constructed a compensation model to repair the current frame. This restoration approach is full automatic and the repair process of current frame does not need the information of frames behind it. The algorithm was realized to establish a simple and adjustable repair system. The experimental results show that the proposed algorithm can remove most intensity flicker and preserve tho wanted effects.     

高速电动车组无火回送自发电系统原理分析

高速动车组被机车牵引或者被救援时,由于受电弓被禁止升起,主断路器断开,接触网无法为高速动车组的辅助系统供电,为保证空调、照明系统等正常使用,通过无火回送自发电功能保证动车组负载工作。通过分析无火回送自发电制动系统、网络系统、牵引系统、辅助系统的工作模式,研究无火回送自发电的原理,指出TCMS是高速动车组无火回送自发电控制的核心系统,负责整个发电指令的触发和状态的监控,并对自发电过程中的防滑、电机温度和电能进行管理优化。