Macroblock-level decoding and deblocking method and its pipeline implementation in H.264 decoder SOC design

INTRODUCTION H.264 (Wiegand et al., 2003) is the latest video coding standard developed by the ISO/IEC Moving Picture Experts Group (MPEG) and the ITU-T Video Coding Experts Group (VCEG). Besides many new technologies which can bring high compression effi-ciency, H.264 also provides other tools to flexibly adapt to different transmission networks, such as flexible macroblock ordering (FMO) (Wenger and Horowitz, 2002a; 2002b) for dealing with data er-rors/losses in error prone…     

Physical design method of MPSoC

Floorplan, clock network and power plan are crucial steps in deep sub-micron system-on-chip design. A novel di- agonal floorplan is integrated to enhance the data sharing between different cores in system-on-chip. Custom clock network con- taining hand-adjusted buffers and variable routing rules is constructed to realize balanced synchronization. Effective power plan considering both IR drop and electromigration achieves high utilization and maintains power integrity in our MediaSoC. Using such methods, deep sub-micron design challenges are managed under a fast prototyping methodology, which greatly shortens the design cycle.     

用于低中频GPS接收机的高性能CMOS差分低噪声放大器设计(英文)

设计了一个可用于低中频GPS接收机系统的1.575 GHz的低噪声放大器.首先考虑了ESD保护二极管和焊盘的寄生效应,对输入匹配和噪声性能的优化做了分析,并将窄带电感模型用于电路设计优化.其次基于Vol-terra级数,对放大器的非线性做了分析,推导了电路各参数与,IIp3的关系表达式,据此在功耗和线性度之间做了折衷考虑.采用TSMC 0.18μm射频工艺对低噪声放大器进行设计和仿真.仿真结果表明:在1.8 V工作电压下,噪声系数仅为1.1 dB,IIP3为-8.3 dBm,电流消耗3 mA,电路的输入匹配良好.     

高速ADC电路的电磁兼容设计

针对高速ADC电路设计的特点，重点讨论了包含高速ADC的硬件电路设计中印刷电路板布局时所必须引起注意的电磁兼容问题，包括数字地和模拟地、数字电源和模拟电源的隔离，ADC输入信号、输出信号的处理以及采样时钟的处理等，并给出了一个成功布局的例子。     

Comparison of Attribute Reduction Methods for Coronary Heart Disease Data by Decision Tree Classification

Attribute reduction is necessary in decision making system. Selecting right attribute reduction method is more important. This paper studies the reduction effects of principal components analysis （PCA） and system reconstruction analysis , SRA） on coronary heart disease data. The data set contains 1723 records, and 71 attributes in each record. PCA and SRA are used to reduce attributes number （less than 71 ） in the data set. And then decision tree algorithms. C4.5, classification and regression tree （ CART）, and chi-square automatic interaction detector （ CHAID ）, are adopted to analyze the raw data and attribute reduced data. The parameters of decision tree algorithms, including internal node number, maximum tree depth, leaves number, and correction rate are analyzed. The result indicates that. PCA and SRA data can complete attribute reduction work. and the decision-making rate on the reduced data is quicker than that on the raw data： the reduction effect of PCA is better than that of SRA. while the attribute assertion of SRA is better than that of PCA. PCA and SRA methods exhibit good performance in selecting and reducing attributes.     

New design of sense amplifier for EEPROM memory

We present a new sense amplifier circuit for EEPROM memory. The topology of the sense amplifier uses a voltage sensing method, having low cost and low power consumption as well as high reliability. The sense amplifier was implemented in an EEPROM realized with an SMIC 0.35-μm 2P3M CMOS embedded EEPROM process. Under the condition that the power supply is 3.3 V, simulation results showed that the charge time is 35 ns in the proposed sense amplifier, and that the maximum average current consumption during the read period is 40 μA. The novel topology allows the circuit to function with power supplies as low as 1.4 V. The sense amplifier has been implemented in 2-kb EEPROM memory for RFID tag IC applications, and has a silicon area of only 240 μm^2.     

企业新宠--CPC

本文着重探讨了基于INTERNET技术的CPC概念以及企业引用CPC技术重要意义。     

用紧凑格式频域有限差分法和PVL技术分析导波结构的有效方法

提出了一种十分有效的提取导波结构传播特性的数值方法. 它的基本思想是把Krylov子空间的模式缩减技术( Padé逼近/Lanczos分解)使用在紧凑格式频域有限差分法上, 把大的系统矩阵降阶为很小的系统矩阵,从而加速了矩阵的运算求解.通过对几种导波结构的分析及和其他方法的比较, 证明了这种新方法的准确性和高效性.     

Optimizing pipeline for a RISC processor with multimedia extension ISA

INTRODUCTION Embedded real-time multimedia applications that involve processing of video and audio streams de- mand an efficient media approach. A thorough survey of media approaches and architectures was given by Dasu and Panchanathan (2002). These media proc- essing architectures can be classified into three cate- gories including dedicated (application-specific) hardware, media processors and instruction set ar- chitecture extensions for general-purpose processors. As for embedded med…     

题目：一种支持产品平台设计的多准则模块划分方法

目的：研究多准则约束下的产品模块划分方法,为企业建立稳健的模块化产品平台奠定基础。方法：采用改进的多目标进化算法对建立的多准则模块划分数学模型求解,并采用模糊集合评价机制进行最优解的寻取,得到基于多准则模块划分方法的产品模块划分结果。结论：通过改进的多目标进化算法求解多准则模块划分模型,能够得到有效支持产品平台设计的产品模块划分方案。通过与已有优化方法的比较验证了本文提出的多准则模块划分方法的优越性。     

复合淬火高性能ADI曲轴的研制

通过球铁曲轴的等温淬火和表面超音频淬火复合处理的工艺研究,把等温淬火和超音频淬火两种热处理技术有机地结合在一起,应用于球铁曲轴上,获得了曲轴心部为上贝氏体、残余奥氏体和微量的下贝氏体,保证了心部的高强韧性;表面淬硬层为高密度位错马氏体的综合组织,提高了表层的高耐磨性。其抗拉强度达1 200MPa以上、延长率达到4%~6%、表面硬度达50~58HRC。因此具有优良的力学性能,完全可以取代钢件曲轴应用于中、高端内燃机曲轴。     

计算主族元素Sm~的新方法

应用灰色理论中的等时空距灰色模型GM（1,1）研究了主族元素标准熵（Sm（?））和周期间的关系,所建模型对20种主族元素标准熵（Sm（?））的计算结果和文献报导值与实验测定结果进行了比较,新建模型求得Sm（?）值与实验测定结果之间的绝对平均差为1.807,标准偏差为1.736,明显优于已有文献报导结果（绝对平均值差和标准偏差分别为2.748和2.195）.利用所建模型预言了113号元素（ununtrium,Uut）、114号元素（Ununquadium,Uuq）、119号元素（ununennium,Uue）、120号元素（unbinilium,Ubn）以及阶和Ra的Sm（?）.它们分别是85.96,97.75,120.04,97.38,102.08,78.88 kj/mol.     

利用FDTD方法全波分析与设计管道中用于整流天线的微带天线

1 Introduction In some nuclear power plants , chemical plants ,power plants ,the pipe cracks detection is very diffi-cult because of its thinness and fatalness . So the in-pipe inspection micromachine is developed . The rec-tenna (rectifying antenna) ,rec…     

固相微萃取-液相色谱联用在生物分析中的新策略

集萃取、浓缩、解吸、进样于一体的固相微萃取(solid-phase microextraction,SPME)样品预处理技术可与高效液相色谱(HPLC)联用,非常适合复杂生物样本中的痕量非挥发性目标化合物的定性与定量分析,但存在自动化程度不高、涂层种类少、涂层稳定性差等问题。为此,整理并总结了近年改进策略的研究进展,介绍了不同的SPME萃取形式与HPLC的联用接口设计、新型涂层的制作方法和研究思路,指出了SPME-HPLC未来的发展方向是全自动化、快速、高通量、高灵敏度。     

A matrix padé-type-routh model reduction method for multivariable linear systems

In the present paper, the formulae for matrix Padé-type approximation were improved. The mixed model reduction method of matrix Padé-type-Routh for the multivariable linear systems was presented. A well-known example was given to illustrate that the mixed method is efficient. Project supported by National Natural Science Foundation of China (Grant No. 10271074)     

Column envelope meshing pair and its design method for single screw compressors

A single screw compressor （SSC） is an important component found in many refrigeration systems. However, the durability is not so good because of the friction between its meshing pair. Therefore the column envelope meshing pair was pro- posed to prolong the operating life of SSCs, although it has not been applied to commercial refrigeration systems. To accelerate the industrial application, a mathematical model for analyzing the column envelope meshing pair is established based on the geometry and kinematics. Equations giving the flanks of column envelope grooves are obtained, and teeth flank meshing with the groove is designed. Results show that this model could be applicable in the design of the column envelope type SSC.     

New analytical solution for the analysis and design of permanent magnet thrust bearings

On the basis of the current sheet model, a new analytical solution for permanent magnet （PM） bearings is developed. Compared with analytical methods based on the coupling energy model and the magnetic dipole model, the proposed one is more physically intuitive and convenient for engineering designers. According to the analytical model, the thrust characteristics of a novel PM thrust bearing is studied and verified by finite element analysis （FEA）. In the proposed thrust bearing configuration, the rotor is composed of stacked PM tings with alternative axial magnetization directions, and the stator with alternative radial magnetization directions while copper rings are used to separate adjacent PM rings. A prototype PM thrust bearing with the proposed configuration is designed and fabricated. The performances of the PM thrust beating are experimentally validated. It is shown that the calculation accuracy of the presented analytical solution is satisfying.     

新型高品质因数S形缝隙缺陷地结构(英文)

针对传统的缺陷地结构品质因数低、不足以产生尖锐的谐振特性问题, 提出了一种新颖的S形缝隙缺陷地结构.与传统的缺陷地结构相比, 该结构具有更高的品质因数、相对更简单而紧凑的布局和更陡峭的阻带特性. 通过分析其传输特性提取了该结构的等效电路模型, 推导了其结构参数的设计方程, 研究了该结构的传输特性随结构参数变化的规律, 并总结了设计该S形缝隙缺陷地结构的经验方法. 根据此方法设计加工了一个中心频率为4.64 GHz的S形缝隙缺陷地结构样品, 其品质因数高达39.66, 尺寸大小仅为5.00mm×1.40mm, 谐振带陡峭而通带插入损耗小, 测量结果和仿真结果相吻合, 从而验证了该S形缝隙缺陷地在实际工程上的适用性.     

基于关系数据库表树的数据结构研究

随着关系数据库技术的应用越来越广泛,利用关系表格、关系代数、结构化查询语言等研究基于外存储结构的数据结构有着实际的意义。本文从一个具有树结构的学校管理模型出发,提出一种用关系数据库表来表示树的方法,讨论了如何利用关系代数和SQL语言对表格进行一般查询,借助JaVa语言实现二叉树中比较典型的前序、中序和后序算法,最后对文章开始引出的问题给出了实现程序。     

基于CPC的分散制造企业合作设计的研究

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