AN INVESTIGATION OF BONDING BEHAVIOUR ON THE INTERFACE OF POLYACRYLAMIDE-ALUMINOUS COMPOSITES

MDF cement material,a new kind of highstrength polymer cement,has an exellent proper-ty of bending strength.It is supposed that thisproperty attributes to the mechanism of improv-ing interface strength.In this paper,the bondingbehaviours on the composite interface betweenpolyacrylamide and aluninous cement are studiedwith microimage,XPS surface analysis tech-nique and fracture surface analysis.Actions onthe improving interface in this material are dis-cussed.     

后3G时代LTE异军突起

介绍了下一代无线网络LTE(Long Term Evolution,长期演进)的背景和发展状况.分析了LTE的技术特征,阐述了LTE网络结构与核心技术,并通过与WiFi(WirelessFidelity)及WiMAX(World wide Inter operability for Microwave Access)的各项性能作比较,着重分析了LTE的技术优势.最后,指出了LTE在个人通信市场所面临的应用前景与挑战.     

A multiprocessor based heuristic for multi-dimensional multiple-choice knapsack problem

This paper presents a multiprocessor based heuristic algorithm for the Multi-dimensional Multiple Choice Knapsack Problem (MMKP). MMKP is a variant of the classical 0–1 knapsack problem, where items having a value and a number of resource requirements are divided into groups. Exactly one item has to be picked up from each group to achieve a maximum total value without exceeding the resource constraint of each type. MMKP has many real world applications including admission control in adaptive multimedia server system. Exact solution to this problem is NP-Hard, and hence is not feasible for real time applications like admission control. Therefore, heuristic solutions have been developed to solve the MMKP. M-HEU is one such heuristic, which solves the MMKP achieving a reasonable percentage of optimality. In this paper, we present a multiprocessor algorithm based on M-HEU, which runs in O(T/p+s(p)) time, where T is the time required by the algorithm using single processor, p is the number of processors and s(p), a function of p, is the synchronization overhead. We also present the worst-case analysis of our algorithm, the computation of the optimal number of processors as well as the lower bound of the total value that can be achieved by the heuristic.     

导入六西格玛,有效降低企业劣质成本

本文简单介绍六西格玛管理,重点阐述企业导入六西格玛管理,应对劣质成本.     

内燃机用新型金属橡胶复合垫片的研制

本文介绍了新型金属橡胶复合垫片的材料组成，生产工艺及物化反应机理，重点论述了其物理化学性能，阐述了在内燃机中的应用前景。     

New Approach to Inter‐domain Multicast Protocols

IPTV broadcast channels and video content distribution are increasingly saturating network paths. New solutions based on inter‐domain multicast protocols could contribute to the enhancement of multimedia content distribution over the Internet. The aim of this paper is to propose new capabilities for an existing inter‐domain multicast protocol, the Protocol Independent Multicast‐Sparse Mode. We describe the modified protocol and analyze its behavior using newly developed tools based on an open‐source software simulator. The resulting protocol does not require topology information, which is advantageous for easier deployment. In addition, the adopted solution avoids inherent problems with inter‐domain multicast routing, such as multiple paths and path asymmetries.     

Inter‐carrier Interference Reduction Scheme for SFBC‐OFDM Systems

In this paper, we first analyze carrier‐to‐interference ratio performance of the space–frequency block coded orthogonal frequency‐division multiplexing (SFBC‐OFDM) system in the presence of phase noise (PHN) and residual carrier frequency offset (RCFO). From the analysis, we observe that conventional SFBC‐OFDM systems suffer severely in the presence of PHN and RCFO. Therefore, we propose a new inter‐carrier interference (ICI) self‐cancellation method — namely, ISC — for SFBC‐OFDM systems to reduce the ICI caused by PHN and RCFO. Through the simulation results, we show that the proposed scheme compensates the ICI caused by PHN and RCFO in Alamouti SFBC‐OFDM systems and has a better performance than conventional schemes.     

OFDM系统中ICI自消除算法研究

OFDM系统对频率偏移极为敏感,频率偏移将导致子载波之间失去正交性,于是产生子载波干扰（ICI）,从而降低系统性能。通过对有效抑制ICI的方法—ICI自消除算法进行研究,分析了ICI自消除算法对OFDM系统的影响。在软件无线电（GNU Radio）平台上搭建该系统,并在实际环境中运行。研究结果表明：与传统OFDM系统相比,ICI自消除算法使OFDM系统的误码率得到改善。     

一种电视倍行处理电路的实现

本文成功地设计了包括行重复和行内插在内的倍行处理电路,来抑制和消除行间闪烁及爬行现象,提高图像质量。并通过实验观察了倍行处理的实际效果。     

增强隔热轻量板材在冷柜吸附内胆上的应用

本文对传统的高抗冲聚苯乙烯(HIPS)吸附内胆板材结构进行优化创新设计,将原来的单层内胆结构板材,通过在挤出板材的母粒中均匀添加专用发泡制剂,并采用新型双层共挤工艺,使挤出成型的板材形成复合双层结构,一层为高光致密层,保证吸附成型后内胆表面具有高光质量效果;另一层为微气孔疏松层,无数微气孔形成的密闭气室起到增强隔热的作用,提高整机的能耗等级,低碳环保;同时疏松层密度降低,使整个板材轻量化,节省原材料,实现内胆板材成本竞争力提升。该项技术结构工艺的推广应用,对整个家电行业的3R绿色设计发展将起到巨大的推动作用。