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1.
软件测试方法研究   总被引:2,自引:0,他引:2  
从软件产品的质量出发 ,论述了软件测试的复杂性和难点 ,重点对已有的软件测试方法进行了对比和研究 ,提出了图形处理软件的测试方法——图形对照测试法。从而对软件开发人员和测试人员如何快速而准确地选择有效的测试方法、保证软件产品的质量具有十分重要的意义  相似文献   

2.
在设计上,尤其是平面设计和排版里,文字的设计,运用和排列是视觉传达的重要组成部分,运用中文字体和运用英文字体所产生的效果有明显的不同。当然首先要说明一下的是,任何一种语言和文字在其本质上都是平等的,没有贵贱之分,这里所讨论的只是把文字看作设计中的一种元素运用于平面设计和排版之中,从而在视觉上给人产生的不同感受。对于大多数搞设计的人员来说,在总体上,中文字体的排版效果比英文字体来得逊色一点。因为在设计排版中,字体并非仅仅是作为传达文本意义的符号而存在,字体也同时参与到视觉传达与视觉享受的过程中去了。在平面设计中作为基本概念的"点、线、面"三要素,在字体的运用和排版上同样存在。单个的汉字和由字母组成的单个英文单词,作为单独的点元素来说,已经有太大的差别;当他们分别组成了一行文字构成了线元素之后,差别进一步扩大;而当一行行的文字组成了整排的文章形成了面元素之后,在人们视觉中产生的差别就可想而知了。在对中英文字体做了比较和分析,了解了两者的差别和特点之后,作为中国设计师,就要想办法从多种角度出发,运用多种办法来尽可能的提高中文字体在平面设计中的观赏性。  相似文献   

3.
提出了一种新的矿井通风系统双线巷道自动生成算法——闭环法。该算法对已有的通风系统单线图进行求交、打断等操作,并建立节点—正向弧—反向弧网络拓扑结构图。采取逆时针搜索、最外层闭环优先提取策略,提取网络拓扑结构图中的所有闭环。对闭环进行右偏移操作,最终生成实交点处贯通、虚交点处下行巷道遮挡部分消隐的双线巷道图。闭环法已用于DIMINE数字矿山系统的通风模块中,并在实际矿井通风工程中得到应用。应用表明:采用闭环法生成通风系统双线图,实现简单,结果正确,能准确反映矿井巷道间的空间层位关系。适用于任意复杂的矿井通风系统双线图的生成。为矿井通风双线巷道的自动生成提供了一种新的有效方法。  相似文献   

4.
文章以蓝蝶国际音标(形类)输入法为对象论述了国际音标输入系统的编码思想、算法设计和字体制作.输入编码的基本原则是字形的分类,合理的分类能产生适合用户的键盘操作习惯;算法设计提出了高频优先的动态连续输入效果;字体制作能及时添加所需字符,并完善字句行距等多文种混排版面质量.  相似文献   

5.
6.
Conventional higher level programming languages have not been designed for effective application to the kind of problems which arise in interactive computer graphics. In order to correct this, efforts have been made to use conversational languages or to design command languages which allow the user to interact with the system via light buttons or teletype.This paper describes a conversational system — called DIGS — using a keyboard-oriented language. The language enables the user to construct models step-by-step with a minimum of typing effort. Intermediate results (graphic or non-graphic) may be controlled at each point of the construction process.The purpose is to provide a tool for easily creating and editing fairly complex symbols as well as hierarchic pictures. Data can be associated with the picture parts and relationships defined between them.  相似文献   

7.
There are several techniques for highlighting displayed information. This paper presents the results of an experiment which investigated one form of highighting—drawing graphic boundaries around the information. Two different tasks involving tabular data with low information density were performed by the subjects. The results indicate a significant difference in search time due to tasks, but no significant difference due to the amount of highlighting. The subjective ratings show a significant difference between highlighted and non-highlighted displays for both the tasks.  相似文献   

8.
目前AOP作为OOP的扩展和补充,成为软件工程领域中的研究热点,其核心思想是分离关注点,实现横切关注点的模块化。实现关注点分离的关键技术之一是方面的编织。重点阐述了AOP系统中方面的具体编织策略,包括方面编织实现策略和织入时间策略。详细介绍了目前四种主流AOP系统:AspectJ、AspectWerkz、Spring AOP以及JBoss AOP的编织机制和技术,通过分析和总结目前AOP系统方面编织策略的优缺点,提出了一种基于XML的图形化方面编织框架——XbGAWF,以及XbGAWF与不同AOP平台的集成模式。  相似文献   

9.
How to generate various graphics and how to produce patterns automatically according to the ideas, requirements and rules of the people (experts), are quite important problems in the computer aided design (CAD) and design automation (DA). This paper presents an approach, using shape grammars, on the basis of shape rules to design pictures, which is a preliminary practice of solving the problems artificially. SGIS2D-2D shape grammar and shape rule interactive system has been run on IBM3033 mainframe and IBM PC AT with graphic terminal in PASCAL. This practice has shown that rule—based generating graphics is a good design paradigm.  相似文献   

10.
This study focuses on the visual interface design of WebOPAC, which assists children in carrying out searching and browsing activities for bibliographical information in a library database. The existing interface of WebOPAC, called Ilmu, is investigated in this study; the interface is efficient in retrieving information from the database; however, its poor graphic design causes major usability problems. The graphic design of Ilmu is important in helping children to understand and visualise concepts of searching and browsing. Therefore, the interface must be constructed in such a way that can meet the needs of children aged 7–11 years. In this study, an analysis has been carried out on children’s requirements for the graphic design through participatory design activities using two approaches: cooperative inquiry and sketching of ideas. The cooperative Inquiry approach involved 40 children, while sketching children’s ideas involved 20 children as respondents. A total of 14 requirement specifications were generated and categorised into four areas—use of space, information organisation, function and use of colours; these would serve as a basis in designing a new WebOPAC interface. Synthesis of these requirements has shown that they are best supported through the implementation of visual interface display techniques. Chi-squared (χ 2) test was used to test the responses of children towards the usability of the new interface; the results showed a high level of acceptance by the children, recording a rate of 83.98 %.  相似文献   

11.
G-PLOT is a package of programs for graphic display of data. It has been designed as an integral part of the G-EXEC data-handling system, and adopts the principles of G-EXEC: it is generalized with respect to data, it is structured and modular, and it has a simple (near-English) user interface. In addition, a number of standards have been defined to allow the greatest possible flexibility of usage of the programs, as well as to provide a consistent and powerful set of modules for the applications programmer. The two most significant of these standards are the use of the ‘plot-frame’ concept and the definition of logical raster levels between the data and a ‘logical plotter’. By the use of these standards, it is possible not only to send generated plots to any available graphic device, but also to edit plots by selection and manipulation of logical ‘subframes’—units of plot data such as axes, titling, map frames, and grids. By the combination of G-PLOT facilities with planned enhancements to the G-EXEC system, it will be possible to generate sequences of plot frames from iterative simulation models, or from successively changing parameters (scaling or rotation for example) in normal application programs.  相似文献   

12.
Signal filtering is one of the essential tasks in signal processing. It may become an extremely time‐consuming process, as in the case of intracranial electroencephalogram recordings (eg, 30‐min records) with a large number of channels (up to 256) and high sampling frequencies (up to 5 kHz in research related to ultra‐high‐frequency oscillations). The usual way of dealing with time consumption is process parallelization. Moreover, parallelization using graphic processing unit (GPU) allows further shortening of computing times thanks to the large number of GPU cores. This paper describes a library for GPU‐accelerated finite impulse response (FIR) and fast Fourier transform (FFT) filtering—“CudaFilters.” This library is designed for SignalPlant software—a free tool for signal analysis. The resultant acceleration in computing times was 5× to 40× depending on the task, data, and hardware configuration. The results were also compared to computing speeds in Matlab.  相似文献   

13.
Graphic objects are an abstract mathematical model for graphic systems. The model is an algebraic approach to represent graphic information, which include modelling operations. This formalism require some method to describe normal graphic procedures, such as changing the object colour or texture mapping, as these procedures are essential to represent graphic processes. This paper extends the theory by introducing the concept of graphic object functions. A graphic object function transforms one graphic object into another, changing its visual appearance or its geometric properties. A formal definition of graphic functions is given, with a characterization of two special kinds of graphic object functions: filters and object transference functions. These two kinds of functions can be used to perform normal graphic operations, such as changing colours, texture mapping or clipping. Equivalence relationships between graphic objects induced by functions are also studied. These relationships establish an hierarchical structure on the graphic object set.  相似文献   

14.
图形语言作为平面设计中信息传达的重要表意形式,用其独特的语言特征和信息传播的方式将平面设计作品中的信息传达给受众,图形语言运用的恰当与否,将直接影响平面设计的信息传达。本文将结合图形语言的特征、传播方式等来论述图形语言在平面设计中的作用和在平面设计信息传达中的传播方式,使图形语言在信息、情感等方面能够有效传达。  相似文献   

15.
This article explains the main role that space windowing plays in preliminary knowledge extraction from multifactor and multivariate databases coming from complex system empirical studies. The explanation is based on the general case of a database with a hyperparallelepipedic structure in which the directions correspond to the factors and where the measurement variables may be quantitative or qualitative, temporal or nontemporal, and objective or subjective. First, the data in each cell of the hyperparallelepiped is transformed into membership values that can be averaged over factors, such as time or individual. Then, several graphic techniques can be exploited to investigate membership values. This article mainly focuses on the use of multiple correspondence analysis (MCA). A didactic example with several factors and several kinds of variables—nontemporal vs. temporal where each one may be either quantitative or qualitative—is used to illustrate the widespread use of the pair “space windowing/MCA.” The discussion presents the advantages and disadvantages of using space windowing to perform a preliminary analysis of a multifactor multivariate system study.  相似文献   

16.
SVG创作工具的缺乏限制了SVG在行业应用中的范围。利用AutoCAD图块生成面向领域应用的SVG标准图元既充分利用了AutoCAD的强大功能,又扩展了SVG的适用范围。本文给出了SVG标准图元的表示方法,并分析了图块内部格式,提出了由图块生成SVG标准图元的算法。  相似文献   

17.
This paper defines an abstract mathematical model for graphic systems which incorporates modelling operations. The model is based on the “graphic object” concept. A graphic object is an abstraction of a graphic entity. Graphic objects are a generalization of the Fiume graphic object concept, supporting modelling operations, which give the set of graphic objects an algebraic structure of vector space and booelan algebra. Fiume visualization formalism can be applied to graphic objects. Further, product operations of graphic objects are defined, which are a generalization of solid sweep operations. Graphic object products may be used to build common 2D and 3D objects such as triangles, squares, cubes, circles and spheres from lines and arcs.  相似文献   

18.
文章从全球化背景下平面设计的发展现状入手,分析了全球化给我国平面设计业所带来的问题,在此基础上重点讨论了平面设计视觉表达方式的本土化,平面设计视觉语言的原创性及平面设计视觉语言的国际化三个方面,论证了中国平面设计未来发展趋势的重要结论。  相似文献   

19.
为了深刻分析平面设计的内涵,将理论结合实际,剖析了平面设计的理念和特点.并对Photoshop环境下的平面设计中的广告元素和图片进行了深入浅出的研究,总结了进行平面设计的一般流程.最后强调要结合平面设计理念和特点,才能做好平面设计.  相似文献   

20.
简要介绍了嵌入式图形领域中2D图形加速器的基本情况,并结合Monahans的应用平台的开发,实现了基于Bootloader上的M arvell PXA300集成2D图形加速器的驱动,通过随机生成参数,测试了该图形加速器的绘图速度,并与软件加速的渲染速度进行了比较。  相似文献   

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