专注核心竞争力项目外包为中国企业换一种活法

当项目外包作为一种新的专业化分工形式被创造出来时，它所招徕的企业关注性目光正在与日俱增     

LTE深度覆盖评估体系及专项优化工具

本文从用户感知的角度出发,综合考虑覆盖水平、干扰、VoLTE业务体验等方面,提出了一套建立以客户感知为主的深度覆盖体系,同时运用研发的一系列专项优化工具,用以全方位评估网络的深度覆盖能力.     

MME Pool内MME配置缺失导致TD-LTE切换失败案例分析

TD-LTE网络中的数个MME可以组成MME Pool,从而起到MME负载分担和容灾备份的作用.eNodeB需要同时与多个MME建立连接,如果eNodeB与Pool内某个MME之间的连接中断,该MME上的用户会重新附着到Pool内其它MME上,但其他站点附着到该MME的用户切换到该小区时,会发生切换失败.本文从实际应用出发,对TD-LTE中因MME配置缺失导致切换问题进行深入分析和总结,希望对同类网络优化问题起到指导借鉴作用.     

Guided Wave Propagation in a Gold Electrode Film on a Pb（Mg1/aNb2/a）Oa-33%PbTiO3 Ferroelectric Single Crystal Substrate

Dispersion relations of Love mode acoustic guided 0.33 PT） single crystal with a gold electrode film waves propagation in Pb（Mg1/3 Nb2/3 ） 03-33%PbTiO3 （PMN- are calculated. There is no cross coupling among Love wave modes, which is conducive to eliminating the cross interference between modes. The general formula is derived to precisely measure the thickness of the electrode. More acoustic energy would be concentrated inside the electrode with the increase of film thickness for a given frequency. Compared with the PZT-5 ceramic, [001]c poled PMN- 33%PT single crystal has a slower attenuation of the amplitude of the acoustic guided wave. Therefore, single crystal is extremely suitable for making low loss acoustic wave devices with a high operating frequency.     

J2ME中UEI和Debug Agent技术的研究

随着J2ME技术在嵌入式终端设备上的广泛应用，许多移动设备制造商开发了相应的J2MESDK，用来在PC机模拟环境下开发J2ME应用程序。作为SDK的核心，模拟器(emulator)可以集成到Java集成开发环境(IDE)中去，从而发挥更大的功能。UEI技术使IDE制造商通过支持单一的接口标准，就能够轻松地集成不同公司的emulator。集成了emulator的IDE支持源代码级的调试功能，他的实现通常采用了debugagent技术。简单介绍了J2ME技术，对UEI技术做了详细的研究，最后介绍了debugagent技术。     

Invariable mobility edge in a quasiperiodic lattice

We analytically and numerically study a 1 D tight-binding model with tunable incommensurate potentials.We utilize the self-dual relation to obtain the critical energy,namely,the mobility edge.Interestingly,we analytically demonstrate that this critical energy is a constant independent of strength of potentials.Then we numerically verify the analytical results by analyzing the spatial distributions of wave functions,the inverse participation rate and the multifractal theory.All numerical results are in excellent agreement with the analytical results.Finally,we give a brief discussion on the possible experimental observation of the invariable mobility edge in the system of ultracold atoms in optical lattices.     

High sensitivity gravimetric sensor made of unidirectional carbon fiber epoxy composite on （1-x）Pb(Zn1/3Nb2/3)O3-xPbTiO3 single crystal substrate

We have derived a general formula for sensitivity optimization of gravimetric sensors and have used it to design a high sensitivity gravimetric sensor using unidirectional carbon fiber epoxy composite(CFEC) waveguide layer on(1- x)Pb(Zn1/3Nb2/3)O3-xPbTiO3(PZN-xPT) single crystal substrate with the carbon fibers parallel to the x1 and x2axes, respectively. The normalized maximum sensitivity Sfm λ maxexhibits an increasing tendency with the decrease of(h/λ)optand the maximum sensitivity Sfm λ maxincreases with the elastic constant cE66 of the piezoelectric substrate material. For the CFEC/[011]c poled PZN-7%PT single crystal sensor configuration, with the carbon fibers parallel to the x1 axis at λ = 24 μm, the maximum sensitivity Sfm maxcan reach as high as 1156 cm2/g, which is about three times that of a traditional SiO2/ST quartz structure gravimetric sensor. The better design selection is to have the carbon fibers parallel to the direction of propagation of Love wave in order to obtain the best sensitivity.     

基于Oracle EBS的低成本的原料FIFO解决方案

通过深入分析现有ERP系统和流程,创造性地提出了基于原有ERP系统,综合运用条码和实时报表实现原料库房的FIFO解决方案。此方案简便易行,开发量小,风险低。具有相当的实用性。     

卫星导航高精度抗干扰算法研究

常用的自适应调零卫星导航抗干扰算法，可以对干扰进行很好的抑制，但自适应调零算法会对卫星信号的相位产生扭曲，导致抗干扰处理后的卫星信号无法用于高精度定位。研究数字多波束抗干扰算法，通过对卫星方向信号约束，达到在抗干扰的同时保证卫星信号相位稳定，实现高精度定位。该算法经分析和实际采样数据仿真验证，可实现强干扰条件下卫星导航高精度定位。     

多个简谐振动合成问题进一步研究

本文通过讨论大学物理课程教学中简谐振动合成问题的传统方法的基础上,重点讨论了利用旋转矢量法来合成多个简谐振动问题。通过研究,N个简谐振动合成的合振动振幅取最小值时,其闭合多边形的形状个数是N-1,N取偶数时,存在两矢量相位相反合成矢量后为零,不存在闭合多边形的情况;若N取奇数时,多个矢量合成后不存在为零的情况。对多个矢量合成问题的讨论,能够进一步了解振动合成的理论和规律,理清对简谐振动合成问题的教学思路。