查询词典 implicit difference scheme

Although the Preissman scheme of KP equation is multisymplectic, it took too efforts to realize, Hence we elimate the auxiliary variable by a trivial computation and obtained the multisymplectic forty-five points scheme of KP equation. And then, we test this forty-five points scheme on soliton and solitary waves over long time intervals, the numerical results shows the propagation and interact of soliton and solitary waves.

但是在实际的数值实验中，由于需要计算共轭动量的值，Preissman格式需要占用的计算内存比较大，计算时间比较长，因此我们在数值格式中消去共轭动量，最后得到与多辛Preissman格式等价的一个多辛45点格式，我们用这个格式进行了数值实验，数值实验结果很好地显示了孤立子和孤立波的传播与碰撞。

A second order accurate, high resolution scheme, called WSUC scheme, has been proposed. This scheme is total variation bounded and unconditionally stable in the sense of convective numeral stability.

提出了一种具有二阶空间精度的WSUC格式，对它的精度、总变差有界性和对流的数值稳定性进行了分析。

The distributive signature and cheat-proof secret sharing scheme are used during the course of the signature in this scheme. Compared with recent RSA digital signature,this scheme has a higher security.

该方案在签名过程中溶入了部分签名和防欺骗的秘密共享方案，相比于现有的RSA签名方案，该方案具有更高的安全性。

The detailed analyzed and simulating of focusing error signal of optical pickup based on oblique parallel plate glass was carried out. The new scheme for generating focusing error signal based double reflection plane BSP was proposed. As a result, the structure of optical pickup was simplified, and the cost of optical pickup was reduced. The scheme was not reported in domestic and international literature formerly. Now, author obtained the patent on this scheme.

作者对采用倾斜平板玻璃进行误差信号的提取方案进行了详细的理论分析和模拟，并提出采用双反射面BSP进行聚焦误差信号的提取，该方案可以简化光学读取头的结构，并降低光学读取头的成本，该方案未见国内外报道，目前已经获得专利。

The combined scheme of selective hydrogenation and etherization of FCC's light gasoline and hydrogenation desulfurization of heavy gasoline can make gasoline quality meet EURO IV Standard, indicating that this combined scheme is a feasible scheme selection for gasoline quality updating and upgrading.

FCC汽油实施加氢、醚化及重汽油加氢脱硫组合方案后，可使该汽油质量满足欧IV标准，说明该组合方案是实现汽油产品升级换代的一种可行的方案选择。

Through presentation and discussion of traditional wavelet construction with lifting scheme, the multiwavelet construction with lifting scheme is introduced. The extension of Vetterli-Herley theorem under multiwavelet condition is overall proved in detail. Based on equivalent scalar filters banks, a kind of multiwavelet construction with lifting scheme and corresponding theorem are proposed.

通过介绍基于提升格式构造传统小波的内容，引入基于提升格式构造多小波的研究，对Vetterli-Herley定理在多小波中扩展进行详细全面地证明，提出了一种基于等效标量滤波器组的提升格式构造多小波的实现框架和定理，并通过实例验证该方案的可行性。

In them, choose the best control scheme, PD control scheme with two loops, as the real-time control scheme, and tests it on the linear 1-stage inverted Pendulum real-time control system, The result demonstrate that this strategy can realize the position of dolly and the angle of haulm to be close-loop controlling simultaneity.

通过在实际单级倒立摆装置上的实时控制试验证实所提出的控制方案可以实现了对小车位置和摆杆偏角的同时闭环控制。

We propose a dynamic identity authentication scheme through a theorem about relative prime numbers, which can prevent replay attacks from taking place. In addition, we present a threshold signature scheme without a trusted party by use of joint secret sharing technique. Finally, the security flaw in an enhanced password authentication scheme is pointed out and the security of an enhanced key agreement protocol is analyzed.

首先基于一个关于互素数的定理设计了一个动态身份认证协议，该协议使攻击者不可能通过回放攻击来假冒用户；利用联合秘密共享技术设计了一个无可信中心门限签名方案；最后，分析了一个改进的身份认证协议存在的安全漏洞，以及一个改进的密钥协商协议的安全性。

I~Ythe rational typesetting scheme found out by solving layout design problem is not always a optimized scheme, however, a more optimized typesetting scheme is more in favor of solution of TSP, that is it is more easy to find out a more optimized incise path.

本文的主要内容和结构安排如下：第一章介绍了本文的工作及工作背景，并对求解组合优化问题的传统方法和遗传算法进行了比较；第二章对遗传算法做了系统介绍。

With the compare of research methods such as direct experiment, indirect method and numerical simulation method, and with the applied background of the Virtual Prototype technology, the paper puts forward a new strategy for the design of the testing device for dynamic response of road based on Pro/E、 ADAMS and ANSYS software. On the basis of the theory, this paper analyze the scheme and the important parts, and has proposed that actual modeling parameter, pattern and arrangement scheme, and structured the complete machine scheme of a testing device for testing road dynamic response based on dynamic load of vehicle-road.

本文在系统分析了各种车路系统动载荷研究方法的基础上，针对直接试验方法、间接试验方法和数字仿真方法的发展，并结合"虚拟样机"技术的应用背景，提出了一种基于Pro／E、ADAMS和ANSYS软件的基于车路动载荷的测试路面力学响应的试验装置的虚拟样机的实现策略，并在此基础上，对方案和重要部件进行了分析，提出了实际的建模参数、型式和布局方案，构建了一种基于车路系统动力学的测试路面动态力学响应的试验装置的整机方案。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。