两类代数数域的化简

对一般的三次和四次代数数域Q(α1)和Q(α2),加入两个不很苛刻的条件,把它们变成Q(1β)=Q(α1)和Q(2β)=Q(α2),而1β和β2分别满足Q上既约方程x3 q=0和x4-C=0,这里的q和C都是可计算的常数。     

嵌入式家庭网关的研究与设计

利用家庭网关可以通过Internet操作家庭的各种设备。本文设计了ARM Linux嵌入式家庭网关,介绍了系统的总体结构与设计思路,讨论了家庭网关的通信管理协议。     

一个基于手性还原希夫碱配体的镍配合物的合成、结构及性能研究

采用水热法合成了一个手性镍配合物：NiL[H2kN-（4-carbosyl）benzyl—L-phenylalanineacid,N-（4-羧基）苄基-L-苯丙氨酸],通过X射线单晶衍射仪测定其晶体结构,并进行了元素分析、红外、热重等性质测定．晶体结构研究结果表明,此化合物为正交晶系,空间群为P212121,属手性空间群．化合物中,Ni（II）离子为六配位,形成一个畸变的八面体配位模式．通过配体的桥连作用形成具有一维孔道的三维网状结构．配体上的苯环均朝向孔道．热重研究结果表明,该化合物能稳定到295％左右．     

铝合金轴心受压构件截面不对称性系数研究

铝合金轴心受压构件需要引入系数ηas来考虑截面不对称性带来的不利影响.在大量数值分析的基础上,提出了系数ηas的计算公式,可以作为设计计算的依据.提出了广义的稳定计算系数的概念,用以在确定铝合金轴心受压构件的屈曲抵抗力时考虑系数ηas的影响,这样可与惯用设计方法相一致.     

抛物线色散对一维声学激子的影响

本文采用顾世洧教授处理体内激子方法,把Wilson提出的一维极化子哈密顿量推广到一维激子,并考虑到声子的色散效应,运用微扰法计算抛物线色散时一维声学激子基态能,与无色散时一维声学激子,极化子做了比较。     

环的既约理想和既约分解

引进了环的既约理想的概念,研究了既约理想的性质并得出了理想分解的两个结论1.环的任一理想均可分解为一些(有限或无限)的既约理想的交.2.Artin环或Noether环的任意理想均可分解为有限个既约理想的交.     

A wireless endoscope based on an embedded system

We presented a wireless endoscope system developed on the embedded Linux platform. This wireless endoscope system consists of three parts： the endoscope capsule, the portable equipment and the image workstation, which make this system wireless and portable. Hardware design of this system and software design of the portable equipment are described. In clinical use, patients swallow the endoscope capsule for gastrointestinal inspection. The portable equipment receives images of gastrointestinal tract via the radio frequency module while it sets and reads back parameters of the capsule via the low frequency module. Acquired image data can be saved as a FAT32 format file in an universal serial bus disk. Images can be processed and reviewed at an Microsoft Windows PC workstation in the next stage. The image acquired by this wireless endoscope system is quite effective with clear details of gastrointestinal tract. However, the endoscope capsule was large, making it difficult to swallow. So the printed circuit board design of endoscope capsule needs to be improved.     

二次曲线方程的五点确定法

由命题和定义,通过实例,首先用待定系数法给出了常态二次曲线方程的确定法;然后按二次曲线的射影定义给出了常态二次曲线方程的另一种确定法;再利用二次曲线束的概念求得了变态二次曲线和常态二次曲线的方程;最后求曲线束中的降秩二次曲线,令其系数行列式为零,则给出了二次曲线方程组的解法.     

超二次Hamilton系统的无穷多周期解

该文利用喷泉定理研究了一类超二次Hamilton系统,我们在不需假设Ambrosetti-Rabinowitz条件的情形下,得到了无穷多周期解的存在性.     

Reduced Expanding Load Method for Simulation-Based Structural System Reliability Analysis

The current situation and difficulties of the structural system reliability analysis are mentioned. Then on the basis of Monte Carlo method and computer simulation, a new analysis method reduced expanding load method (RELM) is presented, which can be used to solve structural reliability problems effectively and conveniently. In this method, the uncertainties of loads, structural material properties and dimensions can be fully considered. If the statistic parameters of stochastic variables are known, by using this method, the probability of failure can be estimated rather accurately. In contrast with traditional approaebes,RELM method gives a much better understanding of structural failure frequency and its reliability index β is more meaningful. To illustrate this new idea, a specific example is given.