共查询到20条相似文献,搜索用时 78 毫秒
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得到了三族新的t-优图,反证了Boeach等人提出了的关于t-优图10个猜想中的5个猜想,并提出4个新的猜想,比如以下的猜想不正确,若G是n点e的t-优图,n〈e〈n(n-1)/2,则其连通度是(2e/n)代之以新的猜想,若G是n点e边t-优图,则其边连通度λ(G)=(2e/n)并且若λ(G)≥3,则G的一个边集是λ边割集当且仅当它关联于某个λ度顶点。 相似文献
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1转换算法 为实施转换方便,把需转换的阿拉伯数金额x转化为带两位小数的字符串nc(共t个字符,含小数点),然后应用取子串函数(suhst(nc,i,1)(i=1,2…,t,但除去t—2)从左至右对nc的每一个数字字符实施转换,转换分为两个步骤:1.1数字转换为大写汉字 设 c1=“零壹贰叁肆伍陆染捌玖”,数字 y( 0— 9)通过 subst(c1,2*y十1,2)即转换为对应的大写汉字。 例如,y=3时,subst(c1,2*。3+1,2)为“叁”,即3转换为“叁”1.2依据数字所在位置转化单位汉字 设c… 相似文献
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本文在按字典排序的前提下,给出了生成排列集p(n,r)的枚举算法,为建立p(n,r)与它的反相集合的映射及逆映射,提供了一对编解码算法;在此编解码算法的基础上,为建立p(n,r)与z={1,2,…,│p(n,r)│}之间的一一映射关系,还给出了相应的排序和逆排序算法。实际上,我们给出的这些算法,与已知的算法相比,更具有普遍性和优越性。 相似文献
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多边形的方向与圆弧可视性 总被引:5,自引:2,他引:5
本文继El-Gindy与Avis(1981),Avis与Toussaint(1981),Lee与Lin(1986)及Sack与Suri(1990)提出并讨论图一菜的点可视性与线段可视性之后,提出了图形的方向与圆弧可视性概念,给出了计算简单多边形的方向可视集与中视集的最优算法,本文所得结果可应用于与图形运动有关的机器人学,计算机图形学和CAM与VLSI设计中。 相似文献
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杨壹杰 《CAD/CAM与制造业信息化》2000,(4)
一.倒角标注 I-DEAS的倒角标注方式,不符合国标,以下程序可以实现国标标注: #delete all #get digtize (xl,yl,stl) #if (stl ne 0) then gototheend #get digtize (x2,y2,st2) #if(st2 ne 0) then gototheend #alph=atan((y2-y1)/(x2-X1)) #a=Inttostr(TRUN(abs(alph))) #1=abs(x2-x1) #if(1ne TRUNC(1)) thenset pr… 相似文献
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关于时滞微分方程初值问题的一类并行算法 总被引:4,自引:0,他引:4
1.引言我们用q【LI,t2]表示具有g阶连续导数的函数y:ILI,LZI+*”的全体,特别记C:[ti;tZ]一Cv[ti;tZ]·若11·1为R”中的某个范数,区INI。[。1;。外则记11ylll一SliP{11叭t)11}.考虑时滞方程tEI其中,>0为常数,/:p,qXR”X*”、*”及。。代卜,刊为给定函数,且满足AI:If(t,xl,yi)--f(t,xZ,yZ)115Lllxl一xZll+Mllyl一yZll;其中L,M>0为常数.*’:对给定的。。q卜T;n,映射。、/(。,。… 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
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David Poole 《Computational Intelligence》1989,5(2):97-110
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given. 相似文献
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Watts S. Humphrey 《Annals of Software Engineering》2002,14(1-4):39-72
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical. 相似文献
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基于复小波噪声方差显著修正的SAR图像去噪 总被引:4,自引:1,他引:3
提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。 相似文献