一种低功耗测试图形的生成方法

为解决测试图形生成电路功耗高、硬件开销大、故障检测难等问题,提出了一种用于内建自测试的低功耗测试图形生成方法。该方法将种子向量和SIC计数器生成向量进行运算,产生MSIC测试向量。通过设计一种可配置SIC计数器和种子生成电路,证明了该方法中任意的2个MSIC图形在任何情况下都是相异的。以国际基准测试电路ISCAS’89为对象,在nangate 45nm工艺上的仿真实验表明,基于该方法的测试生成电路的平均功耗占被测电路正常工作时平均功耗的1%～3%;与传统的伪随机测试生成电路相比,该测试生成电路的测试功耗降低了5.48%～66.86%,且其所生成的测试图形具有唯一性、低跳变等特性。     

光电可逆计数器系统的设计

通过对光电可逆计数器系统的研究，分析设计了以CMOS集成电路为基本组成部分，配合光电探测电路，电压放大电路波形整形电路，从而对光信号干涉条纹进行计数，达到高精度测试目的。     

一款通用CPU的存储器内建自测试设计

存储器内建自测试（memory built-in self-test,MBIST)是一种有效的测试嵌入式存储器的方法，在一款通用CPU芯片的可测性设计（design-for-testability,DFT)中，MBIST作为cache和TLB在存储器测试解决方案被采用，以简化对布局分散，大小不同的双端口SRAM的测试。5个独立的BIST控制器在同一外部信号BistMode的控制下并行工作，测试结果由扫描链输出，使得测试时间和芯片引脚开销都降到最小，所采用的march13n算法胡保了对固定型故障，跳变故障，地址译码故障和读写电路的开路故障均达到100%的故障覆盖率。     

基于Hopfield神经网络数字系统测试技术研究

介绍了用离散Hopfield神经网络模型把组合电路约束网络转化为能量函数，用数学优化求能量函数的最小值，即为给定固定型故障的测试矢量。经检测故障覆盖率达到100％并通过试探法进一步优化测试矢量集，然后将测试矢量集的响应序列移入本原多项式求得特征序列，建立故障字典，实验证明该方法切实有效。     

数字电路可测性设计的一种故障定位方法

在逻辑函数ReedMuller模式的电路可测性设计方面，文章采用AND门阵列和XOR门树结构来设计电路，提出了一种设计方案，可实现任意逻辑函数的功能，而且所得电路具有通用测试集和完全可故障定位的特点。给出了进行故障定位的方法，并可把它应用于其他相关电路的可测性设计。     

数字电路测试中的关键技术研究

随着数字电路的广泛应用．电路的测试与故障诊断已成为其设计与生产过程的重要组成部分。讨论了电路的测试及故障诊断中的一些问题．主要包括故障模型、故障仿真、故障压缩及可测试性度量与测试矢量生成算法（ATPG）,并研究了电路测试技术的发展趋势．     

基于FPGA的按键弹跳消除电路的研究与应用

按健在数字电路设计中经常用到。按键的弹跳现象是数字系统设计中存在的客观问题。按键是机械触点，当接触点断开或闭合时会产生抖动。为使每一次按键只做一次响应，就必须去除抖动。本文对按键的抖动信号进行了分析，并通过计数器的方式完成了消除抖动电路模块的设计。把该模块应用到按键控制LCD显示的系统中，并在Memec virtex-4 MB系统实验板上实现了该系统。消抖电路的效果良好，按键控制LCD显示结果正常。     

非线性电阻电路的单故障诊断的一种方法

提出了非线性模拟电路故障诊断的一种测前模拟法．应用伴随电路及特勒根定理导出故障诊断方程，用等电位屏蔽技术识别故障．非线性元件用其工作点参数等效线性化，可对故障电路逐级分块诊断，适用于大规模线性和非线性模拟电路．     

基于QuartusⅡ的九十九进制计数器设计与仿真

在QuartusⅡ5．0软件环境下,将两片四位同步二进制加法计数器74161芯片通过一定方式连接在一起,可构成同步九十九进制加法计数器。采用整体置数方式,分别用十六进制法和十进制法设计,通过仿真,这两种设计方法都是正确的。十六进制法原理图较简单,不用加译码电路就可以实现低位芯片对高位芯片的控制;十进制法原理图相对复杂,但十进制符合人们的思维习惯。对设计出的原理图稍加改变,就可以构成任意进制的同步加法计数器。     

放大电路的频响分析

研究电路对信号传播的响应，一直是电子电路分析和设计的重点．本文对放大电路的瞬态响应、稳态响应、以及二者之间的关系进行了分析研究，全面详尽地剖析了放大电路的频响特性，为放大电路的分析和设计提供了相应的理论分析．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-