云网融合一体化支撑能力探索和应用

随着移动公司从通信服务向信息服务转型升级,云网融合成为新型信息建设的发展方向。如何满足客户快速定制大型专用云网、多种方式快速入云等差异化云网需求,提供灵活多样的丰富网络接入能力和具有核心竞争力的云产品成为移动公司的研究重点。本文提出的省内云网一体化网络接入方案,通过地市云网互联,整合全省云资源,做到内部资源最优化,提升了云业务的接入灵活性和开通的效率,具有丰富接入、泛在联接、专网专用和多云互联的优势,属于全行业领先的系统应用。     

一种低能耗的DSP芯片--TMS320 C55X

１引言 数字信号处理理论崛起于６０年代,到８０年代数字信号处理器（ＤＳＰ）应运而生。数字信号处理器是数字信号处理理论的硬件支持,它大大提高了数字信号处理理论实时实现和应用的可能性,彻底改变了信号处理的面貌。今天数字信号处理器已广泛应用于数字信号处理算法研究、语言、图像、通讯、航天制导、仪器仪表等各个领域。ＴＭＳ３２０Ｃ５５Ｘ（以下简称Ｃ５５Ｘ）是ＴＩ（德州仪器公司）２０００年推出的新产品,建筑于Ｃ５４Ｘ结构之上,能耗极低,是一种很有应用前景的ＤＳＰ芯片。２ Ｃ５５Ｘ的结构 Ｃ５５Ｘ ＤＳＰ核是Ｃ５５…     

Spiking patterns of a hippocampus model in electric fields

We develop a model of CA3 neurons embedded in a resistive array to mimic the effects of electric fields from a new perspective. Effects of DC and sinusoidal electric fields on firing patterns in CA3 neurons are investigated in this study. The firing patterns can be switched from no firing pattern to burst or from burst to fast periodic firing pattern with the increase of DC electric field intensity. It is also found that the firing activities are sensitive to the frequency and amplitude of the sinusoidal electric field. Different phase-locking states and chaotic firing regions are observed in the parameter space of frequency and amplitude. These findings are qualitatively in accordance with the results of relevant experimental and numerical studies. It is implied that the external or endogenous electric field can modulate the neural code in the brain. Furthermore, it is helpful to develop control strategies based on electric fields to control neural diseases such as epilepsy.     

低电压低功耗CMOS采样保持电路

设计了一个用于流水线型模数转换器的低压采样保持电路。为降低采保电路中运放的功耗,本文采用了增益补偿的采样保持电路结构,从而用简单的低增益运放达到高精度的效果。并从运放输出建立时间的角度对其输入电流进行优化。为了提高精度,降低采样开关的电阻并减小非线性误差,设计了信号相关自举电压控制的开关。仿真结果表明在1．8V的电源电压下,达到10bit的精度和50Mbit的采样率,整个采保电路的功耗仅为2．3mW。     

Effective suppression of beta oscillation in Parkinsonian state via a noisy direct delayed feedback control scheme

This work explores the function of the noisy direct delayed feedback(NDDF)control strategy in suppressing the pathological oscillations in the basal ganglia(BG)with Parkinson’s disease(PD).Deep brain stimulation(DBS)alleviates the PD state fantastically.However,due to its unclear mechanism and open-loop characteristic,it is challenging to further improve its effects with lower energy expenditure.The noise stimulus performs competitively in alleviating the PD state theoretically,but it cannot adapt to the neural condition timely and automatically due to its open-loop control scheme.The direct delayed feedback(DDF)control strategy is able to disturb excessive synchronous effectively.Therefore,the NDDF control strategy is proposed and researched based on a BG computational model,which can reflect the intrinsic properties of the BG neurons and their connections with thalamic neurons.Simulation results show that the NDDF control strategy with optimal parameters is effective in removing the pathological beta oscillations.By comparison,we find the NDDF control strategy performs more excellent than DDF in alleviating PD state.Additionally,we define the multiple-NDDF control strategy and find that the multiple-NDDF with appropriate parameters performs better than NDDF.The obtained results contribute to the cure for PD symptoms by optimizing the noise-induced improvement of the BG dysfunction.     

VRS技术在像控测量中的应用

本文主要介绍了VRS技术在像片控制测量中的应用。根据了浙江省连续运行卫星定位服务系统（ZJCORS）的建设情况，结合本人在像控测量中的应用，为VRS技术在像控测量以及其他领域的推广应用起到了重要的借鉴示范作用。     

矩形钢管砼截面内缺陷对不同路径波动测量的影响

钢管混凝土结构在超高层建筑中的应用日益广泛,由于施工质量控制不到位及混凝土材料收缩等原因,其内部可能出现核心混凝土空洞缺陷及混凝土与钢管壁间的界面剥离缺陷,进而对其力学性能带来负面影响。该文针对矩形钢管混凝土截面的缺陷检测,在表面粘贴压电陶瓷片进行测量,对这两种内部缺陷在不同测试路径上压电陶瓷片响应的影响进行试验和数值模拟分析。通过对健康、存在核心混凝土空洞和界面剥离缺陷的不同试件不同检测路径上压电传感器输出信号的比较,研究了缺陷对应力波传播的影响,并得到采用对测方式检测的敏感范围。结果表明采用对测方法可有效检测钢管混凝土缺陷,其敏感范围的确定具有工程意义。     

通用语音处理平台中非透明PCI-PCI桥的性能分析

非透明PCI-PCI桥的性能是的影响通用语音处理平台的关键因素之一。文中分析了影响PCI-PCI桥性能的各种因素，并提出了如何提高系统性能的方法。     

基于改进TOPSIS的配用电通信网性能评估方法

针对传统的层次分析法的不足,研究了多指标综合评估系统中指标权重的确定问题,并提出一种基于改进TOPSIS的配用电通信网性能评估方法。该方法将SAW方法、TOPSIS方法与改进的AHP方法相结合对配用电通信网进行综合评估,并针对TOPSIS方法无法对中垂线上的数据进行处理的问题,提出了新的基于相对熵的TOPSIS方法。仿真结果表明,改进的TOPSIS方法更适合对指标敏感的配用电网络进行评估。     

TC/MAX码捕获准则及其在超宽带系统中的应用

针对码捕获中门限设置的复杂性,提出了一种过门限捕获与选取最大值相结合的码捕获准则(简称TC/MAX准则),并将此准则应用于直扩超宽带通信系统码的捕获。理论分析和计算机仿真表明,采用TC/MAX准则可获取比过门限捕获更好的捕获性能。