智能型高压开关柜硬件系统设计

智能化是开关设备的一个重要发展方向。探讨了智能化电器应具有的功能及实现方法，设计了智能型高压开关柜硬件系统，介绍了其总体结构和数据采集系统，开关量输入／输出电路、串行通信电路、硬件时钟与 自复位电路等主要功能电路的具体设计方案。     

基于复杂可编程逻辑器件的数字频率计设计

选用在系统可编程大规模集成ispLS11032-70PLCC84芯片作硬件电路，以Lattice Expert7.1作EDA设计工具，设计一种新型数字频率计，该频率计采用ABEL－HDL对其中的各部分元器件进行编程，实现了闸门控制电路、计数电路、多路选择电路、位选电路、段选电路等。频率计的测频范围：1Hz-70MHz。该设计方案通过了软件仿真、硬件调试和软硬件综合测试。     

语音小车的硬件平台设计

介绍了语音小车硬件子系统的设计与实现.完成了电源电路、复位电路、键盘电路、音频输入电路,机电行驶状态控制电路和PWM电机调速电路等硬件功能模块的设计.     

离心泵性能测试系统的设计与实现

本文介绍了该离心泵性能测试系统的测试原理及测试过程，给出了该系统硬件电路的方案设计，将计算机硬件接口电路与数字电路相结合，以实现离心泵性能检测控制的目的。系统的软件设计包括3部分：数据采集程序；数据处理程序；绘性能曲线并实现打印、打印预览程序。     

并行程序的一种形式化硬件综合方法

基于并行语言的操作语义，提出一组将语言构造模块转化为硬件电路的规则。利用这些规则，系统地将程序转化为由寄存器、锁存器及数据路径组成的电路。硬件实现的正确性可以通过转化规则得以保证。     

一个新混沌系统的电路设计与实现

根据电路设计原理,设计了一种新颖电路来实现一个新的混沌系统,整个电路由加减运算电路、积分电路、反相电路3部分组成,电路结构对称.基于硬件电路实验平台,对设计的电路进行硬件电路实验研究,给出相应的实验结果,硬件电路实验结果与计算机仿真结果完全一致.     

水塔水位自动控制系统研究

采用纯硬件电路实现了水塔水位的自动控制，设计出一种低成本、高实用价值的水塔水位控制器．该系统具有水源检测、电机故障检测、报警等功能．采用独立的电路实现超高、低警戒水位报警，超高警戒水位处理，并配有手动控制电机电路．     

单片微型机系统加密技术的实现方法

介绍了单片机系统加密技术的实现方法，即硬件加密和软件加密，并给出了相应的硬件电路及例程。     

基于Verilog HDL设计的PWM输出控制

介绍了一种利用硬件描述语言Verilog HDL设计PWM输出控制的方法,用以实现电机控制、交流检测等功能。并以电机控制为例,重点对硬件电路和软件设计进行了论述。与纯硬件电路相比,硬件描述语言VerilogHDL设计的电路可以根据需要随时进行改变,使得电路的实时性和设计弹性得到了较大的提高。     

多功能信号发生器的设计

本文以STC12C5A60S2单片机为核心设计了一个低频函数信号发生器。信号发生器采用数字波形合成技术，通过硬件电路和软件程序相结合，可输出自定义波形，如正弦波、方波、三角波、梯形波及其他任意波形，波形的频率和幅度在一定范围内可任意改变。波形和频率的改变通过软件控制，幅度的改变通过硬件实现。本文介绍了波形的生成原理、硬件电路和软件部分的设计原理。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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-