一种面向对象的函数式语言

设计了一种对象式和函数式相结合的混合型语言OOFL(面向对象的函数式语言),详细给出了它的语法及语义定义,提出了相应的实现方案,并在微机上实现了OOFL到C++的转换系统.从而提供了一种面向对象机制的描述工具.     

C++函数的参数传递和返回值问题的教学研讨

C++是计算机专业的一门基本程序设计语言课程,函数是理解C++语言的重要基础。而C++中函数的参数传递和返回值内容是一个重要而难讲解的内容。笔者系统地分析了函数参数传递中值调用和引用调用以及函数值返回和引用返回的本质,并举例进行了说明。最后给出了讲授这部分内容的一些经验和方法。     

Linux平台C/C++和汇编昆合编程

Linux的核心代码大部分是用C语言编写的,不可避免的其中还有一部分是用汇编语言写成的.有些汇编语言代码是利用gcc的内嵌语句直接嵌在C语言程序中的;还有一些则是写在汇编源程序中的,特别是Linux的启动代码部分.文章介绍了在Linux的gcc/g++环境下,C/C++程序中如何内嵌汇编代码;分析了汇编源程序如何与调用它的C/C++程序接口.     

C环境下DSP程序存储空间访问技术

针对TMS320C2xx系列DSP的C编译器未提供程序存储器数据操作的C运行库函数的问题,介绍了该项技术的解决方法.通过介绍函数功能实现所用汇编指令以及TI的C编译环境软堆栈结构和C语言调用规范,详细描述了C可调用DSP程序存储空间访问技术的程序实现方法.该技术可用于具有大量数据常量的工程应用中,以解决其数据存储单元资源紧缺问题.利用该技术还可以在程序存储空间上开辟一段空间用作非易失性存储空间存储用户掉电保护数据,这样有利于简化系统并提高系统性能.实践证明,该技术具有极高的实用价值.     

基于Matlab/Simulink的电力电子电路仿真

C语言和Fortran语言在科学计算中发挥了重要作用,而Matlab作为一种新型的高性能的语言,它和传统的程序设计语言相比具有强大的数学运算功能和绘图功能.文中主要介绍了如何用Matlab来进行电力电子电路仿真,并通过几个算例来说明它的有效性.     

基于容器的面向对象技术的多态性实现及应用

多态性是面向对象技术的重要特性之一,C++语言支持静态多态性和动态多态性.静态多态性主要通过函数重载和运算符重载来实现,动态多态性主要通过虚函数和动态联编来实现.多态性使程序设计更加灵活、易维护和易扩展.介绍了动态多态性在C++语言中的实现机制,提出基于容器的动态多态性实现技术,结合VC++6.0中绘图软件开发实例,描述基于容器的绘图过程及动态多态性应用.     

VC调用MATLAB的方法

讨论了在VC中调用MATLAB的3种方法,并对3种方法进行了比较:通过MATLAB Engine方式可以调用C/C++函数和工具箱中的函数,同时还可利用MATLAB中强大的图形功能,但该种方式的致命缺陷是不可脱离MATLAB的环境;用LCC编译器可以脱离MATLAB环境,该种方式只能调用MATLAB中的C\C++函数,并且不支持图形;Matcom是一种比较有效的方法,它不仅可以调用C\C++函数,并且可以支持图形,但缺陷是不能调用涉及MATLAB内部类的函数。通过对3种方法的分析,指出了开发数据分析软件的一种有效途径。     

C240X系列DSP定点数学函数库的应用

定点DSP在做浮点运算时效率不高,影响了定点DSP的应用.TI公司推出针对C24X系列DSP的qmath数学函数库,用定点算法优化实现了常用的一些数学函数.本文介绍了该数学函数库的使用方法和要注意的问题,并在相同硬件条件下进行了执行定点函数和浮点函数的对比实验,结果表明合理使用定点数学函数可以显著提升C语言DSP程序的执行效率,对定点DSP应用系统的高级语言开发有很大帮助.     

虚拟机平台的研究与设计

本文以虚拟机技术为主要研究对象,分析和研究了一些关键技术,如字节码文件结构,虚拟机的内存管理,虚拟机执行引擎等,利用C/C++语言,设计虚拟机平台的关鍵模块.     

C++语言对C语言的扩展

针对C++语言与C语言的关系及C++语言的语法规则和编程方法上的特征,着重从传统结构化过程语言方面、面向对象编程语言方面和程序设计三个方面,探讨了C++语言对C语言的扩展.     

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-