共查询到20条相似文献，搜索用时 125 毫秒
1.
引人广义a-对角占优矩阵和广义双a-对角占优矩阵概念,给出判定它们的充分必要条件,并由此获得了矩阵特征值的两个新包含区域,证明新的特征值包含区域包含于最近几个文献所给的特征值包含区域,因而能更精确地确定矩阵特征值的位置． 相似文献
2.
万文婷 《荆门职业技术学院学报》2012,(7):41-43,50
文章研究了列随机矩阵的逆特征值问题。利用矩阵谱的性质,给出了以特殊数集为谱的列随机矩阵逆特征值问题有解的几个充分条件及解的表达形式,并给出了两个数值例子。 相似文献
3.
文中给出了矩阵的基本c-特征值的几个性质及圆盘定理并利用这些结果讨论了可共轭对角化矩阵的扰动对其基本c-特征值产生的影响. 相似文献
4.
戴建宇 《湖南第一师范学报》2012,12(4):110-111,124
由于四元数乘法的不可交换性,给四元数以及四元数矩阵的研究带来了一定的困难,通过讨论四元数体上矩阵特征值的估值问题,得到了关于四元数矩阵特征值的几个不等式。 相似文献
5.
园盘定理与特征值的估计 总被引：1，自引：0，他引：1
郭兴 《吕梁高等专科学校学报》2001,16(1):15-16
本文通过对矩阵的Gerschgorin园盘定理的讨论缩小了矩阵特征值的取值范围 ,并通过几个例子 ,说明了它的应用 相似文献
6.
利用 Dashnic-Zusmanovich 矩阵的非奇异性给出随机矩阵非奇异的2个新的充分条件,得到了随机矩阵的2个新的非1特征值包含集。数值实例表明,在某些情况下所得结果改进了几个已有结果。 相似文献
7.
李小宜 《延安教育学院学报》2007,21(2):45-47
应用块拟对角占优矩阵的几个充分条件,研究块α-二重几何平均对角占优矩阵的非奇异性,特征值分布及以这类矩阵为系数矩阵的线性方程组的Jacobi迭代解法的收敛性等问题。 相似文献
8.
万文婷 《荆门职业技术学院学报》2013,(2):49-52
文章利用实对称矩阵特征值与特征向量所具有的特性,给出了以实数集为谱的广义对称双随机矩阵逆特征值问题有解的几个充分条件和解的表达形式,并以二元、三元、四元实数集为例,说明了具体构造解的方法。 相似文献
9.
10.
万文婷 《荆门职业技术学院学报》2010,25(9):41-43
复半正定矩阵是半正定Hermite矩阵的推广。本文利用矩阵的特征值,讨论了复半正定矩阵乘积的半正定性,给出了两个复半正定矩阵的乘积仍是复半正定矩阵的几个充分条件以及两个特殊的复半正定矩阵的乘积仍是复半正定矩阵的充要条件。 相似文献
11.
杜保营 《内江师范学院学报》2014,(8):20-23
将处理Sturm-Liouville算子的一些方法用于处理一类特殊边值条件Jacobi算子,并通过对一类特殊边值条件Jacobi算子特征值的性质进行探讨,经过证明,得出了一类特殊边值条件Jacobi算子的特征值对其系数具有连续依赖性的结论. 相似文献
12.
Universities have a long-established tradition of granting students special consideration when circumstances beyond their control negatively affect performance in assessments. Typically, such situations affect only one student (e.g. medical emergencies) but we consider the impact of a natural disaster that led to all students being eligible for special consideration on a single assessment. Students did not have to get applications for special consideration endorsed by a qualified professional but were able to rate their own level of impairment. Our findings indicated that students were impaired in their performance and accordingly application for special consideration was warranted. Those few students who did not submit an application were disadvantaged relative to their peers. There was little relationship between the students’ self-reported levels of impairment and their performance, but those who considered themselves seriously impaired were disproportionately unlikely to complete the assessment. Those with poorer grades leading into the final assessment were no more likely to request special consideration. Although our observations were with an unusual example, our overall findings support the need for a special consideration policy, and indicate that students can treat such a policy appropriately and not exploit the opportunity to obtain unmerited advantage. 相似文献
13.
Shaw RA 《Journal of learning disabilities》1999,32(4):320-8, 349
It has been observed for decades that some students have a particularly difficult time learning another language. Colleges and universities have an obligation to offer special language programs designed to help these students succeed in their attempts to learn another language. However, for those few students who cannot learn another language even with special instruction, allowing them to meet the foreign language requirement though the substitution of related courses is appropriate and does not constitute a fundamental alteration of the goals of a liberal education. 相似文献
14.
In November 2003, the Scottish Executive Education Department (SEED) commissioned the SCRE Centre at the University of Glasgow to evaluate the impact of Section 15 of the Standards in Scotland's Schools etc Act 2000 . The evaluation took place between January 2004 and August 2005. A major strand of the research was the impact of the presumption of mainstreaming on special schools, including an exploration of the changing role of special schools, and the changing demands on staff in special education. The evidence presented in this paper suggests that whilst there may be widespread support for specialist provision within a policy climate of inclusion, the sector has undergone significant changes in the last few years. These changes have had a particular impact on the curriculum, teaching and learning, and 'specialness' of special schools. However, not all of these changes are due to the impact of mainstreaming. 相似文献
15.
杜爱萍 《云南师范大学学报(哲学社会科学版)》2008,40(1):21-25
未成年工特殊保护是未成年工在劳动过程中享有的特殊权益,我国已制订了比较完善的未成年工特殊保护的法律法规.但因诸多原因,侵犯未成年工权益的现象日益增多.加入WTO后,我国未成年工的特殊保护将会受到世界更多的关注,而在国际社会,未成年工的特殊保护有日益与贸易挂钩的趋势,为应对这一趋势,我国应进一步完善未成年工的特殊保护体系. 相似文献
16.
This article describes a 5-year effort to integrate special and regular students on a campus where special and regular education students are housed in separate but adjacent facilities with separate administrators. Observational data and questionnaires revealed almost total segregation at the end of 3 years. An intensive intervention program, Project L.E.A.D., generated promising short-term movement toward integration, but there were few enduring effects. Physical, social, and psychological barriers created by the two-roof school erect almost insurmountable obstacles to integration. Future efforts should concentrate on building one-roof schools with a single facility and administration. 相似文献
17.
《Support for Learning》2005,20(1):22-27
UK higher education appears to have generally been slow to adopt an organised means of provision for special educational needs for its students. This may be due to the fact that, historically, relatively few disabled students entered UK higher education. However, there is a growing number of disabled students entering UK higher education institutions, and the figure is likely to increase. It is therefore important and, under the UK Special Educational Needs and Disability Act (2001), legally binding, that UK higher education institutions make appropriate adjustments to their activities so as not to disadvantage or discriminate against disabled students. In this article Mark Taylor examines the development of the special educational needs coordinator role in a higher education setting based upon a two‐year case study in a UK university. 相似文献
18.
张丽华 《郧阳师范高等专科学校学报》2008,28(1):38-40
晏殊是文学史上少有的政治上官位亨通、少有波折的文学家,虽然他的词里很少反映出政治生活的内容,但是因为晏殊有这样特殊的政治身份和经历,所以他的词里还是会透露出政治家的个性,使他的词具有了不同的艺术特色。 相似文献
19.
北京市特殊儿童学前家庭教育状况调查报告 总被引：1，自引：3，他引：1
特殊儿童的学前教育对于个人成长和社会发展都具有十分重要的意义。但事实上 ,只有极少数的特殊儿童学前有机会在特殊教育机构中受到教育 ,绝大多数的学前特殊儿童只能呆在家中。本研究对北京市 6 8名特殊儿童的学前家庭教育状况进行调查 ,并对其中 2 2名儿童的家长做了深入的访谈。研究发现特殊儿童学前家庭教育的一些基本特点 :特殊儿童的问题发现较晚 ;特殊儿童接受学前专业机构教育人数少 ;获得社会的支持较少 ;特殊儿童家长对早期教育的重要性认识不够 ;缺乏专业人士的指导。最后 ,我们从家庭和社会两方面作了分析 ,并提出了相应的建议 相似文献
20.
Noel Purdy 《欧洲特需教育杂志》2013,28(3):323-330
This study considers the reasons why so few male student teachers are entering the special education sector. This comes as recent statistics reveal that the percentage of male teaching staff in special education in Northern Ireland is much lower than in England. The article first critically considers the international literature on male students’ perceptions of entering the teaching profession. The study then examines the opinions of the post‐primary student cohort at one major initial teacher education institution in Northern Ireland and contrasts male and female responses in terms of students’ confidence in their knowledge of special educational needs and their relative willingness to consider specialising in this area. The study reveals significant differences in the cohort between male and female students’ perceptions, and through individual interviews it explores further the reasons why male students are reluctant to specialise in special educational needs. 相似文献