一种快速CRC 算法①的硬件实现方法

介绍了CRC校验算法的硬件电路实现方法。CRC校验广泛应用于通信、存储系统，在串行CRC实现的基础上，对电路结构提出了改进的方案，并实现了CRC的并行计算，由此进一步可以适用于任意位数据宽度的数据输入情况。     

Photoluminescence Characterization of Silicon Nanoparticles Hybridized Europium Complex

A europium complex Eu (DBM)3 TPPO (Eu tris(benzoylmethide)-(triphenylphosphine oxide)) and silicon nanoparticles have been hybridized.The hybridization can evidently change the photoluminescence (PL) characteristics of the Eu complex in the following aspects:under an excitation of 390nm,the intensity of the PL peak at 611nm due to the ^5Du-^7F2 transition of the Eu^3 ions has been increased by 30%,and thc integrated PL intensity in the visible range has been increased by nearly 3 times;the PL excitation efficiency beyond 440nm has been improved cvidently;the peak in the PL excitation spectrum shifts from 408nm to 388nm,and the PL decay time decreases from 2.07 to 0.96μs,The experimental results indicatde that in the PL process,the photoexcited energy may transfer from the silicon nanoparticlcs to the Eu^3 ions.     

行为级DSP算法描述的阵列处理器综合方法研究

本文提出了针对递归DSP算法的高层次系统综合流程,并以脉动(systolic)式处理器阵列结构实现.从DSP算法的FDDL行为级描述开始,经由编译及划分,产生数据相关流图(Data Dependency Graph),然后实现对算法流图的空间映射及时域规划,得到算法的信号流图(Signal Flow Graph),经时序重构,生成脉动阵列,最后实现对处理器单元的数据路径综合及控制器综合,并对处理器单元定位,本文同时提出了各设计阶段的算法策略及优化策略,并给出综合结果。     

Gate and drain currents in off-state buried-type p-channel LDDMOSFETs

The buried-type p-channel LDD MOSFETs biased at high positive gate voltage exhibit novel characteristics: (1) the ratio of the drain to gate currents is about 1×10^-3 to 5×10^-3; and (2) the gate and drain currents both are functions of only the gate voltage minus the n-well bias. Such characteristics are addressed based on the formation of the surface n ⁺ inversion layer due to the punchthrough of the buried channel to the underlying shallow p-n junction. The measured gate current is due to the Fowler-Nordheim tunneling of electrons from this inversion layer surface and the holes generated within the high-field oxide constitute the drain current. The n⁺ inversion layer surface potential is found to be equal to the n-well bias plus 0.55 V. As a result, both the oxide field and the gate and drain currents are independent of drain voltage     

High-Dimensional Nonlinear Envelope Equations and Nonlinear Localized Excitations in Photonic Crystals

We investigate the nonlinear localized structures of optical pulses propagating in a one-dimensional photonic crystal with a quadratic nonlinearity. Using a method of multiple scales we show that the nonlinear evolution of a wave packet, formed by the superposition of short-wavelength excitations, and long-wavelength mean fields, generated by the self-interaction of the wave packet, are governed by a set of coupled high-dimenslonal nonlinear envelope equations, which can be reduced to Davey-Stewartson equations and thus support dromionlike high-dimensional nonlinear excitations in the system.     

一种新型半桥不对称PW M控制变换器

介绍了一种适用于DC／DC半桥变换的不对称PWM控制方案，分析了电路的工作原理，给出了150W变换器的仿真波形和实验结论，结果表明，该控制方案能在恒定开关频率下对变换器实现高效率的软开关控制。     

强混合样本下回归加权估计的一致渐近正态性

在强混合样本下,讨论固定设计回归模型的加权函数估计的一致渐近正态性,给出一致渐近正态性的收敛速度,这个速度接近n-1／6．     

Surface rumpling of cubic CaTiO3 from density functional theory

In this paper, the structure of cubic CaTiO3 （001） surfaces with CaO and TiO2 terminations has been studied from density functional calculations. It has been found that the Ca atom has the largest relaxation for both kinds of terminations, and the rumpling of the CaO-terminated surface is much larger than that of TiO2-terminated surface. Also we have found that the metal atom relaxes much more prominently than the O atom does in each layer. The CaO-terminated surface is slightly more energetically favourahle than the TiO2-terminated surface from the analysis of the calculated surface energy.     

拉长截面等离子体垂直位移不稳定性及其动力稳定

本文研究了拉长截面Tokamak上等离子体的垂直位移不稳定性。计算表明,其快速振荡部分由周围导体中感生的涡流稳定;其慢速漂移部分则需由主动稳定系统予以控制。本文提出一种动力稳定的方法。它在物理上是可行的,并具有技术上简单、较低的功率要求及有利的频率效应等优点。这些说明,这种动力控制方法是一种有吸引力的控制垂直位移不稳定性的手段。     

强化自动控制系统课程实践环节的搜索

介绍了利用科研项目和科研成果，将最新技术与成果向实践性环节转化，开设高水平系列化的综合型，设计型实验的一些做法，并总结了科研成果向实践性环节转化过程中的一些社会。