Two - order enhanced un - split finite volume euler method for multi - fluid flow , which combines the roe approximate riemann solver , is developed to simulate the multi - fluid interactions , such as the fluid described by polynomial eos , stiffen gas eos , jones - wilkins - lee ( jwl ) gaseous explosive eos , cochran - chan ( cc ) solid explosive eos and hom shock wave eos , etc . numerical results of the id , 2d and 3d multi - fluid interaction examples show that the high - resolution method and interface capturing equations can resolve the multi - fluid flow correctly and successfully . a simple fluid - mixture type ppm algorithm for multi - fluid flow , which is based on vof interface capturing method and resolved by langange / remap two steps , is developed to simulate the high density or high pressure ratio flow at both sides of the interface 本文提出了实用于多介质流体的增强型二阶精度有限体积欧拉数值计算方法，采用roe方法近似求解riemann问题，可以适用于多项式状态方程、 “ stiffengas ”状态方程、 jones - wilkins - lee爆轰产物状态方程、 cochran - chan固体炸药状态方程以及hom状态方程等，并对多介质流体相互作用的一维、二维、三维问题进行数值计算，数值验证了本文给出的高精度差分格式和界面捕捉方法的正确性，两种方法耦合形成的多介质流体数值计算方法是成功的。
To utilize the advantages of dsp chips , the system should be computing sources economical . according to digital signal processing theory , the poly - phase fir can help reduce the workloads of the ddc / duc . therefore , adding the complex carrier mixers , the channelization system ( a method of using a single wideband facility to transmit many relatively narrow - bandwidth signals . by subdividing the frequency spectrum used in the wideband channel ) can be formed utilizing the characters of fft 为了使开发出的软件可以适用于高速dsp器件开发，节省系统资源，课题首先从数字信号处理的理论进行分析，得出可以利用抽样率转换的数字滤波器的特点，即多相滤波实现数字上下变频计算负担的减小，之后进一步将多相滤波器与频谱搬移部分结合，通过公式的推导，得出可利用快速傅立叶变换的特点实现多路信号的信道化发射和接收的处理模型。
By studying the monitor program on evaluate board and monitor software on pc , we can turn the adsp21xx facility development system with devclp and debug functions into reality . secondly , a simple system of adsp2181 is designed . we developped a simple system with adsp2181and least peripheral equipments Adsp2181最简系统是利用美国模拟器件公司的典型定点数字信号处理器adsp2181为主处理器，通过最简的外围器件，构造一个可以适用于许多应用的核心处理小系统，同时它又是一个简易的开发系统。
Driver development is a new and difficult subject in our country . this paper describes how to create a pci device driver for data encryption device card . in this paper , we describe relative system structure . basic hardware knowledge . framework of driver , the way of implementation etc . the meaning of this paper is not only driving the data encryption devcie card . but also the way of implemetation and structure of the source codes can be suit for other pci device drivers under nt system 可以说，本文所实现的驱动程序的意义不仅仅在于可以完成对数据加密卡的驱动，更重要的是，编写驱动程序所采用的方法和代码结构可以适用于nt系统平台的其他pci设备，从而实现同类的驱动程序的编写。全文共分为七章。第一章引言介绍驱动程序开发的国内外的现状和本文所实现驱动程序的技术难点。
The beginning point of the first research direction is that we design a type of load - balancing virtual topology which is insensitive to the traffic , such plan method has been proposed whose name is vlbs ( valiant load - balancing schemem ) , the disadvantage of vlbs is that it can only be applied to the homogeneous network in which each node has the same capacity , in chapter2 , a more general valiant load - balancing scheme ( gvlbs ) has been proposed , the advantage of the gvlbs is that it can be used both on the homogeneous network and heterogeous network , in this chapter , we will give the detail derivation process and numerical analysis . the beginning point of the second research direction is that we first design a virtual topology for the physical topology under a specific traffic matrix , for a while , the traffic has changed , the network performence will decline . under such condition , in chpater 3 , a virtual topology reconfiguration algorithm is studied which can decrease the average weighted hops 本文针对动态变化业务量情况下的wdm网络设计方法划分为两个主要的研究方向,第一个方向的研究出发点是可以在最初的虚拓扑设计过程中根据物理拓扑情况设计出一种虚拓扑出来,该虚拓扑是负载均衡的,在这种虚拓扑上跑的业务量矩阵特征只要在某种范围以内,无论它怎样动态变化,网络都不会出现拥塞,但这种虚拓扑设计算法vlbs的一个缺陷是它只能适用于同构网络,即每个节点所拥有的容量大小都相等,在第二章中,本文提出了一种更通用的负载均衡的光网络虚拓扑设计算法gvlbs ,该算法与传统的负载均衡算法vlbs不同之处在于vlbs算法只能适用于同构网络而gvlbs算法既可以适用于同构网络,又可以适用于异构网络,在本章中将给出了gvlbs算法的的详细推导和数值分析。
Furthermore , the assembled element holds the superiority characterized by fem such as agility of objects and unification of program . it can be used to analyze structures wi th arbitrary shapes , interior structures , boundaries as well as arbitrary loads . it is a new type fem that is extremely suitable for the global analysis of complicated structures 另外，组合单元保留了有限元法所具有的灵活性与程序统一性特点，可以适用于任意形状、任意内部构造、任意边界与载荷的结构系统分析，是一种非常适于复杂空间结构总体分析的新型有限元方法。
With the rapid development of modern optics and its corresponding science and techniques , the application of optical facilities become more and more abroad , especially the aspheric optical facilities , so it is exigent to develop a new ultra - precision process method which is suitable for hard - brittle material in aspheric process 随着当今光学以及相关科学技术的迅速发展,光学器件的应用越来越广泛,尤其是非球面光学元件,因此迫切需要研究可以适用于脆硬材料非球面加工的超精密加工方法。
We take several evaluation criteria of the elevator function into account and make the rules of logic . at last , simulation was made under virtual environment . compared with conventional egcs , elevator group control using fuzzy neural network can be used not only to variety traffic , but can also meet all needs of single traffic mode 最后,对电梯群控系统的模糊神经网络控制方法进行仿真,并与传统的群控方法进行比较,结果证明基于模糊神经网络的电梯群控可以适用于各种交通流模式,又能满足各单一交通模式下的性能要求。
