基于Proteus的电子电路设计研究

本文使用Proteus对典型的函数信号发生器（模拟电路）、四路彩灯（数字电路）和数显直流稳压电源（模数混合电路）进行了设计与分析，仿真结果表明，在电子工程设计领域，利用Proteus进行电子电路设计，既省时省力省材、低碳环保，又可以降低设计成本、提高设计效率．     

模拟集成电路遗传算法的优化设计

针对模拟集成电路设计中设计周期长、参数复杂且精度低等问题,提出了一种智能算法——遗传算法。通过对模拟集成电路中二级运算放大电路的设计,运用遗传算法对其电路的各个性能指标进行了优化分析,有效地提高了各性能指标。该优化方法对模拟集成电路进行优化设计,并且基于Hspice仿真结果与实际电路设计非常接近,具有很高的实用价值。     

CMOS集成运放的伸缩性版图设计

根据基本ＣＭＯＳ集成运算放大器的电路特点及设计指标，编制了ＰＳＰＩＣＥ电路通用分析源程序，由模拟结果推导出各模拟参量与其决定因素之间的关系，进而确定了由设计指标决定的版图几何尺寸和工艺参数，提出了伸缩性版图设计的思想，建立了从性能指标到版图设计的优化路径，为实现模拟集成电路版图的自动设计提供了初步的步骤和程序。     

基于数模混合的集成电路设计技术

集成电路的应用使得我国的微电子技术水平不断提高,并在我国的信息产业发展中扮演着十分重要的角色。集成电路可以分成三大类:数字电路、模拟电路与数模混合电路。科学技术的进步和人们生活生产需求的不断提高为数字模块逐渐与模拟模块内嵌在同一个芯片上提供了很大的动力。目前通讯与电子产业是数模混合电路应用的两大主要领域,与此同时人们也在不断扩大数模混合电路的使用领域。基于这一背景,本文讲解了数模混合电路设计的主要流程,以此为之后的研究工作提供借鉴。     

基于数模混合的集成电路设计技术

集成电路的应用使得我国的微电子技术水平不断提高,并在我国的信息产业发展中扮演着十分重要的角色.集成电路可以分成三大类：数字电路、模拟电路与数模混合电路.科学技术的进步和人们生活生产需求的不断提高为数字模块逐渐与模拟模块内嵌在同一个芯片上提供了很大的动力.目前通讯与电子产业是数模混合电路应用的两大主要领域,与此同时人们也在不断扩大数模混合电路的使用领域.基于这一背景,本文讲解了数模混合电路设计的主要流程,以此为之后的研究工作提供借鉴.     

一种高集成度吸排油烟机监控器的实现

描述了作者设计的一种用于全自动吸排油烟机专用集成电路控制器的自动报警、自动监控、延时开关等功能,给出了该专用集成电路的典型应用电路及操作方法.该电路具有价格低廉、外部元件少等特点.     

基于电流模技术的超高速BJT模拟开关

电流模理论和电流模技术是当代电子学先进的理论与技术 ,用电流模法设计模拟集成电路是模拟电子技术的重大突破。采用电流模理论和电流模电路设计超宽频带、超高速度模拟开关。介绍了电路结构 ,分析了电路的工作原理 ,给出了电路性能的仿真结果 ,并总结出了电路的主要特点 ,讨论了电路的设计问题。所设计的电路可以做成单片集成电路 ,也可以作为一个基本单元应用于大规模集成芯片中。     

一种高集成度吸排油烟机监控器的实现

描述了作者设计的一种用于全自动吸排油烟机专用集成电路控制器的自动报警、自动监控、延时开关等功能，给出了该专用集成电路的典型应用电路及操作方法，该电路具有价格低廉、外部元件少等特点。     

MSI功能的扩展与使用

实际集成块的种类和功能都是有限的,往往无法满足工程上的需要,寻求集成块功能的扩展,实现一件多能是专业工程技术人员所期望的,也是集成电路的应用方向.功能的扩展使同一整机电路器件的种类减少,电路简化,连线减少,整机可靠,同时也简化了设计工作.随着电路对集成块的要求,大,中、小集成电路块都在被使用,但以中规模集成块(简称MSI)使用为多.555定时器是模数混合的MSI,组成时序电路的主要部件触发器是MSI,组合逻辑电路中的数据选择器,译码器是MSI.本文仅讨论触发器、数据选择器、译码器功能的扩展与使用.     

用于模式识别的多输入开关电流型模糊处理器

提出了一种用于模式识别的新型多输入开关电流模糊处理器。该处理器是一个模数混合系统。其中，数字部分用于对输入码进行译码，并且产生系统所需的时钟和控制信号，模拟部分用于处理模糊信息并输出识别结果。该系统可以采用分时的方法接收未知模式的多个特征。模糊处理利用加权求和－求大操作，其中综合函数的权重可调，以提高处理器的自适应能力，并拓展其应用场合。侧重于集成电路的模拟程序ＰＳＰＩＣＥ模拟结果表明，该系统性能好、精度高。同时，电路在规模上易扩展。由于采用开关电流技术，该系统电路可以直接采用标准的数字互补型金属氧化物半导体（ＣＭＯＳ）工艺来实现，便于模、数混合集成，易于超大规模集成电路（ＶＬＳＩ）的制作。     

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-