基于PIC单片机和ICL7650的高性能检流计

本文阐述了基于PIC单片机和ICL7650的指针式检流计的设计,实现了表头指针保护,欠压检测,自动关机,键控灵敏度选择等功能并具有稳定性和灵敏度高的性能.     

摇摆显示装置图形界面的设计与实现

设计了一种新型＂助降灯臂＂的图形界面,它通过2台大屏幕显示器来中心对称地显示角度指针光带,从而精确地指示横摇角度.设计在基于TMS320C6416双通道视频显示系统的基础上进行,采用了硬件上实现效率较高的改进的Bresenham多点直线生成算法,用C语言分别对左向和右向指针屏幕进行了编制了相应的直线生成程序,并给出了结果,实现了横摇指示的可视化.     

C语言指标探讨

结合实例从五个方面对C语言指针进行分析和探讨：阐述C语言指针的概念和正确使用指针变量,区分指针变量和指针的指向变量的含义和用法;通过判断变量与运算符*。[]和（）的结合顺序来确定变量的数据类型及指向变量或成员变量的类型;指出指针与数组的关系,通过指针来访问数组元素和采用下标法数组元素的等价关系;作为函数参数的指针变量;可以改变所指向的主调函数变量的值;指针可以实现动态存储分配,用来实现对链表的创建,插入和删除等操作。     

C语言中操作对象的指针法引用

指针是用C语言实现高质量代码的关键,也是学习C语言的难点.针对C语言指针教学中发现的问题,首先介绍了指针的定义,然后对指针的使用进行了详细阐述,包括用指针引用变量、用指针处理字符串、用指针调用函数、用指针对文件操作等,并通过实例进行了详细解析.以便于学习者熟练掌握指针知识,并合理运用指针进行程序设计.     

指针与C程序效率教学探讨

通过指针可以设计出更加高效、灵活、简洁的C程序.作者主要从指针的自加减运算、指针作为函数参数、指针与动态多维数组和指针数组四方面,分析了指针应用对C程序效率的影响.     

关于二级指针的进一步探讨

阐述了二级指针的概念,把二级指针分成指向指针变量的指针和指向数组的指针两种情况,讨论了二级指针变量与二级指针数据的用法与区别.     

对象中的指针对封装的影响

提出了在C++编程环境中把对象内的指针区别对待的思想.对于内部含有指针的对象,根据对象与其中的指针所指向内容的关系,可以把指针分为内含式和外联式两类.内含式指针所指向的内容是对象的一个组成部分,外联式指针则描述对象与外部的联系.C++程序设计环境并不支持这样的划分,需要设计人员自己处理.对内含式的指针必须设计相应的拷贝构造函数,并且对赋值运算符进行重载,否则有可能破坏对象的封装特性.     

带有指针的嵌套式语言全程数据流分析及程序分片系统

以PASCAL语言为模型,设计并实现了一个针对带有指针的嵌套式语言的全程数据流分析及程序分片系统,能够有效地处理程序中的指针,在程序测试、程序理解、程序调试、程序分片等领域都将有广泛的应用.     

基于PIC单片机和ICL7650的高性能检流计

本文阐述了基于PIC单片机和ICL7650的指针式检流计的设计，实现了表头指针保护，欠压检测，自动关机，键控灵敏度选择等功能并具有稳定性和灵敏度高的性能。     

灵活应用指向结构体数组的指针

指针是一个特殊的变量,它里面存储的数值被解释成为内存里的一个地址。在C语言中指针的概念比较复杂,使用也比较灵活。每一个学习和使用C语言的人都应当深入地学习和掌握指针。本文介绍了指针的概念、指针和数组的关系,并深入探讨了指向结构体类型数组的指针变量及其定义方法,同时通过实际问题详细说明了如何灵活应用指向结构体数组的指针及使用时应该注意的问题。     

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.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that