一种基于顺序图的软件性能分析方法

软件性能工程SPE是一种重要的性能分析方法，它将UML顺序图转化为执行图，进而分析软件的性能是否符合期望的指标。然而软件性能工程（SPT）却未给出顺序图到执行图的具体转化方法，在实际应用特别是自动实现时存在一定的困难，文中通过对模型图的形式化定义，提出了一种顺序图转换为执行图的基本算法，并给出了一种基于顺序图的软件性能评价方法。     

程控交换软件设计和维护中的图模型

在程控交换软件设计和维护的问题空间，有两类问题对软件的性能和可靠性有决定性的影响：共享资源的一致性和进程创建顺序的正确性。以一种计算模型－图模型，描述上述两类问题的解空间。叙述了所使用的图模型的概念，给出了图模型的数据表示，对图模型在程控交换软件设计和维护中的实际应用进行了探讨。     

程控交换软件设计和维护中的图模型

在程控交换软件设计和维护的问题空间，有两类问题对软件的性能和可靠性有决定性的影响：共享资源的一致性和进程创建顺序的正确性．以一种计算模型——图模型，描述上述两类问题的解空间．叙述了所使用的图模型的概念，给出了图模型的数据表示，对图模型在程控交换软件设计和维护中的实际应用进行了探讨     

UML顺序图的COSMIC-FFP度量方法

COSMIC-FFP是新一代软件功能规模度量方法,但由于其规则过于抽象导致较难推广。本文研究UML顺序图的COSMIC-FFP度量方法,通过给出COSMIC-FFP与UML顺序图概念之间的对应关系,提出了贯穿于整个度量过程的11条规则和从UML顺序图到度量结果矩阵的度量过程。通过实例验证了所提方法能使COSMIC-FFP更具有实用性。     

随机Petri网工作流模型的等价性能分析

建立系统Petrl网工作流模型,给出了顺序、并行、选择、循环四种基本结构的等价化简公式。将原模型转化为随机Petri网工作流模型,并应用这一性能等价方法,逐步化简,最终得到系统的平均执行时间和与性能分析相关的有效定量参数。     

用粘合的方法研究一类新的整和图

为进一步完善整和图理论,采用顺序标号法给出龙虾树的一种整和标号。利用粘合的方法证明了有公共顶点的一系列多重龙虾树也是整和图。该结论不但推广了整和图类型,也为树的理论研究提供了依据。     

贝壳图是整和图

整和图理论研究的是图的一种标号方法,从实用的角度看,整和图标号可用作图的压缩表示,即表示图的数据结构,可作为图的一种定义及存储方式.笔者采用顺序标号法分别给出贝壳图MS{4n}、MS{5n}的整和标号,从而进一步推广并证明了所有贝壳图MS{mn}(m≥3,n≥2)都是整和图.     

两种有代表性软件图自动布局的研究

研究软件图自动生成中的软件图自动布局问题．把软件图分为无向的和有向的两大类，对于无向软件图，选择Ｅ－Ｒ图作为其代表；对于有向软件图，选择数据流图作为代表．对这两种图，分别给出其可读性准则，并建立了Ｅ－Ｒ图的行列整齐对联结式布局算法和数据流图的主流向式布局算法     

嵌入式实时软件建模方法研究

随着硬件设备计算能力的迅速提高以及社会需求的不断变化和增长,嵌入式实时软件变得越来越复杂.为了提高系统的安全性和可靠性,将基于UML的建模方法与形式化建模方法相结合,可以为嵌入式实时软件建模和验证提供一种良好的解决方案.采用UML扩展机制,在UML2.0顺序图中加入嵌入式实时软件建模所需的时间特性,并提出一种由UML2.0顺序图构造出时间自动机的方法,为下一步验证奠定理论基础.     

并行环境下基于图着色理论的空间数据部署

在面向计算部署到数据节点端执行的分布式并行环境下,提出一种基于图着色理论的适用于矢量空间数据的部署方法,将空间数据粒度的部署问题转化为图顶点着色的过程,提高了任意空间区域的信息查询效率.给出基于图着色理论的数据部署方法,并通过节点的任务量进一步改进算法,使得该算法可实现海量空间数据粒度的离散化部署,提高了空间数据检索和查询的并行化程度,充分利用了并行计算资源.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the