双游程编码的无关位填充算法

双游程编码是集成电路测试数据压缩的一种重要方法,可分为无关位填充和游程编码压缩两个步骤.现有文献大都着重在第二步,提出了各种不同的编码压缩算法,但是对于第一步的无关位填充算法都不够重视,损失了一定的潜在压缩率.本文首先分析了无关位填充对于测试数据压缩率的重要性,并提出了一种新颖的双游程编码的无关位填充算法,可以适用于不同的编码方法,从而得到更高的测试数据压缩率.该算法可以与多种双游程编码算法结合使用,对解码器的硬件结构和芯片实现流程没有任何的影响.在ISCAS89的基准电路的实验表明,对于主流的双游程编码算法,结合该无关位填充算法后能提高了6%-9%的测试数据压缩率.     

一个具有改进开关逻辑的12位1MHz采样速率的低功耗逐次逼近型模数转换器

作为数据采集系统中的关键模块,逐次逼近型模数转换器的功耗决定了整个系统的功耗水平。本文给出了一个具有改进开关逻辑的12位1MHz采样速率的低功耗逐次逼近型模数转换器。通过采用所提出的开关逻辑,该逐次逼近型模数转换器的功耗和面积跟采用传统开关逻辑的逐次逼近型模数转换器相比都会有很大的降低,其中开关逻辑的平均功耗大约降低了80%,总的电容面积减小50%。不仅如此,文章还提出了一种简化的数字控制逻辑来降低数字控制电路的功耗和面积。仿真结果表明和传统的数字控制逻辑电路相比,提出的简化数字逻辑的功耗可以减小大约50%。所设计的芯片在标准的0.35微米的CMOS工艺下进行了流片,芯片内核的面积为1.12平方毫米。在-55℃到150℃温度变化范围下,芯片100KHz的输入信号可以测得64.2dB的SNDR。在给定3.3V的电源电压下,芯片的功耗仅为0.72mW。     

Hybrid Spintronic Materials from Conducting Polymers with Molecular Quantum Bits

Hybrid materials consisting of organic semiconductors and molecular quantum bits promise to provide a novel platform for quantum spintronic applications. However, investigations of such materials, elucidating both the electrical and quantum dynamical properties of the same material have never been reported. Here the preparation of hybrid materials consisting of conducting polymers and molecular quantum bits is reported. Organic field-effect transistor measurements demonstrate that the favorable electrical properties are preserved in the presence of the qubits. Chemical doping introduces charge carriers into the material, and variable-temperature charge transport measurements reveal the existence of mobile charge carriers at temperatures as low as 15 K. Importantly, quantum coherence of the qubit is shown to be preserved up to temperatures of at least 30 K, that is, in the presence of mobile charge carriers. These results pave the way for employing such hybrid materials in novel molecular quantum spintronic architectures.     

基于位替换运算的RFID双向认证协议

安全性是射频识别系统面临的重要隐患,针对该问题,设计了用于加密的位替换运算,并提出了一种新的基于位替换运算的RFID双向认证协议(SRMAP).安全与性能分析表明:SRMAP可抵抗多种潜在攻击,且能够使标签内计算操作、存储空间及通信量得以降低.最后,采用BAN逻辑方法形式化证明了该协议的正确性与安全性.     

A note on Sobolev orthogonality for Laguerre matrix polynomials

Let {Ln(A,λ)(x)}n≥0 be the sequence of monic Laguerre matrix polynomials defined on [0, ∞) by Ln(A,λ)(x)=n!/(-λ)n∑nk=0(-λ)κ/k!(n-1)! (A I)n[(A I)k]-1 xk,where A ∈ Cr×r. It is known that {Ln(A,λ)(x)}n≥0 is orthogonal with respect to a matrix moment functional when A satisfies the spectral condition that Re(z) ＞ - 1 for every z ∈σ(A).In this note we show that forA such that σ(A) does not contain negative integers, the Laguerre matrix polynomials Ln(A,λ) (x) are orthogonal with respect to a non-diagonal SobolevLaguerre matrix moment functional, which extends two cases: the above matrix case and the known scalar case.     

大力推广PCB工业产品中的废品、边角料的环保回收工作

文章评论了PCB行业“三废”之一——‘废料’(PCB和CCL的生产过程中产生的)的治理——可资源化问题。PCB和CCL的边角料与废品等的新型物理回收及其综合利用,它可能是目前和今后实现PCB行业产品可再资源化和循环经济的最佳的方法之一。     

A/D转换器有效位数的测试

重点介绍了A／D有效位数的评估方法及其条件，讨论了数据采集的量化理论，分析了如何有效地得到系统有效位数的原理和方法，以及实际测试时的测试方法和正确的测试设备．     

数据库在器件信息管理中的应用

讨论数据库在器件信息管理中的应用。从需求分析、数据库概要设计及系统详细设计三个部分进行综合分析,使得管理员能够快速可靠的完成各种器件的征订、购买、领取及其他票据的管理。加快某一期间从征订到下发的周期,以保障科研生产任务的顺利完成。     

Memory feedback controller design for stochastic Markov jump distributed delay systems with input saturation and partially known transition rates

This paper considers the problem of stabilization for a class of stochastic Markov jump distributed delay systems with partially known transition rates subject to saturating actuators. By employing local sector conditions and an appropriate Lyapunov function, a state memory feedback controller is designed to guarantee that the resulted closed-loop constrained systems are mean-square stochastic asymptotically stable. Some sufficient conditions for the solution to this problem are derived in terms of linear matrix inequalities. Finally, a numerical example is provided to demonstrate the effectiveness of the proposed method.