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通过定义n(≥2)阶矩阵Mn(F)的k-伴随矩阵及其原矩阵,进行已知k-伴随矩阵求其原矩阵的讨论,推广和改进了已有的一些结果. 相似文献
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在高等代数中矩阵是研究问题很重要的工具,在讨论矩阵的转置运算时给出了对称矩阵和反对称矩阵的定义及性质。现在我们通过定义矩阵的倒转置运算给出副对称矩阵和副反对称矩阵的定义,然后研究它们的性质,最后研究它们与对称矩阵、反对称矩阵之间的关系。 相似文献
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高等代数中矩阵是一大重点理论,是研究实际问题的重要应用工具,在讨论矩阵的转置运算时给出了对称矩阵和反对称矩阵的定义及性质。现在我们通过定义矩阵的倒转置运算给出副对称矩阵和副反对称矩阵的定义,对他们的性质及其与对称、反对称矩阵间的关系进行研究。 相似文献
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在矩阵的向量函数和矩阵的Kronecker积的基础上定义了矩阵的部分向量函数,利用Moore-Penrose的有关知识给出了矩阵方程的Hankel矩阵解的结构和性质. 相似文献
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给出了k等差数列、行一等差矩阵和列一等差矩阵的定义,得到了增广矩阵为行一等差矩阵和列一等差矩阵的线性方程组在不同秩下的同解方程组及一般解的表达式。 相似文献
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针对Rough集本身的代数定义和其他各种扩展模型没有提供简捷的计算边界元素数目的算法,笔者定义了粒矩阵和Rough关系矩阵,采用二进制粒矩阵运算代替传统的等价类计算获得上、下近似,灵活高效。从集合论的角度完善了Rough集理论,并在此基础上,提出了基于粒矩阵的知识发现算法,同时举例证明了Rough包含与Rough相等的隶属度函数定义的充要条件仅仅是必要条件。 相似文献
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在完全分配格上定义了格矩阵,以及对称矩阵、幂等矩阵、逆矩阵等,通过给出了格矩阵的若干运算性质,讨论了有关对称矩阵、幂等矩阵的一些性质和定理,并给出证明. 相似文献
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逆M-矩阵的判定及并行算法 总被引:3,自引:0,他引:3
给出了任意一个n阶非负实方阵A为逆M-矩阵的一种简单方便的判定方法.利用此方法,使一个任意阶矩阵A逐次降阶为最后只需利用逆M-矩阵的定义判定其是否为逆M-矩阵,从而可以判定A是否为逆M-矩阵,并对其算法及实现问题进行了研究. 相似文献
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Spence speculates that Egypt's pyramid builders found true north by using a plumb line: when the stars Kochab and Mizar were seen on the same vertical, one was facing north. As evidence in support of this hypothesis, she points to the proposed interstar-line precession past the north celestial pole at a rate of 27' per century (cy). We argue that a mathematical error affects this result, which when corrected points more strongly to a different pair of stars. This suggests that the conventional ancient chronology, instead of being compressed, may actually have to be expanded slightly. 相似文献
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制约我国软件企业发展的障碍来自软件产业环境障碍及企业自身障碍.软件产业环境障碍的消除取决于政府的宏观调控力度,来自软件企业自身障碍的消除取决于企业软件质量的保障. 相似文献
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针对目前我国软件IT企业需求的尴尬和高职软件人才培养的滞后的状况,在分析了其中缘由的基础上,从软件IT企业的需求角度出发,本文阐述如何使高职学生成为软件IT企业需要的合格人才。软件IT企业需要的合格人才所具备的三种能力:写质量较高代码的能力、自己动手解决问题能力和团队合作的能力,并在实际的教学方面取到了明显的效果。 相似文献
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我国教育软件领域当前面临的一个重要任务就是加强教育软件工程学的研究和应用,并以此推动大量规范的高质量教育软件。首先从总体上讨论了教育软件、教育软件工程、教育软件生存周期,然后以提高教育软件质量、加强教育软件产品开发的可延续性、增加用户满意度为目标,在深入研究CMM的基础上,论述了一个基于CMM的教育软件工程实施框架。 相似文献
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《清华大学学报》2020,25(3):401-414
Green and Sustainable Software has emerged as a new and highly active area in the software community.After several years of research and work, we believe that it is now necessary to obtain a general snapshot of how the research in this area is evolving. To do so, we have applied the 5 Ws(why, when, who, where, and what), a formula for getting the complete story on a subject. We have therefore carried out a study, using 542 publications related to Green and Sustainable Software research; these were recovered using SCOPUS. The results obtained allow us to conclude that it is important to identify key elements of the research to allow researchers be fully aware of the state of the research on Green and Sustainable Software(why); the study uses papers published between 2000 and the beginning of November 2018(when); the most prolific authors are mainly from Europe, although the USA is the most active country, Green and Sustainable Software being a very interactive area with a good number of multinational publications(who); the top five keywords related to sustainable aspects are Green Software, Green IT,Software Sustainability, Energy Consumption, and Energy Efficiency(what); finally, as regards the places authors prefer to publish in, there is almost a complete balance between conferences and journals, with a trend towards an increase in the number of publications(where). 相似文献
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This paper points out various relationships between Design Knowledge and Software Engineering. After introduction of human design, the relationships between industrial Software Engineering is discussed, then further details of human design knowledge are revealed with discussions on humanistic aspects of design. 相似文献
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Software industry oriented education faces more challenges than traditional research and discipline oriented education.To meet these challenges,the Learning by Doing teaching pattern plays an important role in the software industry oriented education.Practice and experience in the teaching of Master of Software Engineering(MSE)students in the Software School of Sun Yat-sen University are presented in the paper.From our viewpoint of MSE education,the success comes from a good trade-off between Learning by Doing lectures and theoretical lectures.Furthermore,feedback and communication are critical and requisite for the successful application of Learning by Doing teaching pattern. 相似文献
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CMM为软件过程能力的提高提供了一条改进的途径,软件企业应该以正确的方法进行软件过程的改进、制定以及CMM的评估。 相似文献