广义逆A_(T,s)~(2)的复合矩阵及其应用

建立了复合矩阵的广义逆与广义逆的复合矩阵之间的关系,得到了广义逆的体积与广义逆的复合矩阵的体积之间的关系.并通过一个数值例子对Drazin逆的复合矩阵及其体积之间的关系进行了验证.     

Large-scale low-frequency rainfall regimes and their transition modes in summertime over China

It is well known that the predictable period of daily weather is generally within 2-3 weeks, so spatio-temporal mean predictands have to be employed in the monthly, seasonal, and annual predictions. At present, rainfall patterns (RPs)[1-5] are the key for…     

可点值化集值非扩张映象耦合不动点集的闭凸性

在严格凸Banach空间中,研究可点值化集值非扩张映象T的耦合不动点集F(T)的闭凸性.     

Retrospect to Human Deep Space Exploration History and Its Prospect in China

1The Goals of Deep Space ExplorationThe deep space exploration is relative to nearearth space exploration.According to theWhitePaper on China’s Space Activities in2000[1],theexploration of space other than earth is presentcalled“Deep Space Exploration”in China.Thisconception is not unchangeable.It will evolvewith improvement of space technologies andcapabilities of mankind.Generally activities of human space can becategorized into three fields:Earth ApplicationSatellite,Manned Space…     

The Primal Exploration of Space launch and Manned Lunar-landing

The lunar-landing is the continuity of manned spaceflight engineering. Comparing with the manned spacecraft engineering, it requires more reliability , larger scale, and more funds. On the basis of China＇ s achievements and the experiences of foreign com~tries, the paper brings forward the idea that using the existing transportation technology to send the launch vehicles and cosmonauts to the near-earth orbit in batches, assembling the components together on the space-launch platform, and then launching them to the moon to fulfill our dream of manned landing on the moon. The paper also discusses the space launch platform and the launching ways.     

矩阵萌芽中的数学思想与文化

矩阵的萌芽寓于中国古代解方程组的方法中.算筹是矩阵最早的雏形.《九章算术》中矩阵的萌芽过程,从数目语言到符号语言经过了漫长的年代,凝结了丰富的数学思想与方法.矩阵的萌芽,具有中国传统数学的文化底蕴,对推动中国社会政治、经济的发展起着基础性的作用,在世界数学发展史上占有重要的地位.     

本真生命与诗意人生——《九月寓言》文本阐释

"人之栖居"是海德格尔后期的主要思想。他把栖居之所具化为天地神人所构成的"四重整体,"通过建立一个本真的自然世界而恢复神与人,存在与大地的本源联系,使人与物的存在居于澄明。无独有偶,张炜在其小说《九月寓言》里也做了同样的努力:对"地瓜"、"黑夜"、"九月"等独特的意象的歌吟,极富诗意地还原了自然生命的本真形态;同时,通过对小村人流浪与安居两种生存境遇的诗意描绘,昭示了诗意栖居的必要性。     

一种基于密钥分解理论的文件安全分割算法

提出了密钥分解问题的向量空间投影理论,由此给出了密钥分解算法,并且将该理论和算法引入文件分割问题的研究中,给出了一种应用于实际保密场合的文件安全分割及恢复算法,实现了将文件分割成n个子文件,而从其中任意m(1≤m≤n)个子文件恢复原文件的功能,为重要文件的存储和传输提供了安全保证.最后对在通信保密中实现信息的分解保密提出了建议.     

边界为导体平面的角域的静电场研究

对导体平板构成的角域内具有线电荷密度的静电场进行了求解.主要利用保角变换法以及电像法和数学软件Mathematica相结合,得到了任意夹角角域内的电势的表达式,并做出夹角为直角时的等势线簇图形.     

关于地基压力扩散角θ的取值方法的探讨

对地基压力扩散角θ的取值从理论上进行了探讨,提出了当“Es1/Es2<3”时地基压力扩散角θ的合理取值方法.分析并验证了当“Es1/Es2<3”时利用规范和简化公式验算地基软弱下卧层这一方法的合理性和可行性.