查询词典 scheme design

A hierarchical IDbased proactive threshold signature scheme is presented. The scheme has the structure of hierarchical PKGs, so a lowerlevel PKG can share the workload of secret information generation and identity authentication with a higherlevel PKG. At the same time the scheme has the property of proactive security, that is, the whole lifetime of signature is divided into several time periods, and the shares of private key need to be renewed in each time period.

方案具有分层的PKG结构，低层PKG可以分担高层PKG的秘密信息产生和身份认证的任务；同时具有动态安全的特性，将签名的整个生命周期分成若干时间段，每个时间段都对密钥份额进行更新，更新后的份额重构的密钥保持不变。

Large Time StepGlimm's schemeand Godunov's scheme are generalizations of the corres-ponding Glimm's scheme and Godunov's scheme.

大时间步长的Glimm格式和Godunov格式是相应的Glimm格式和Godunov格式的一种推广。

For the broadness and complexity of scheme design itself, it's too difficult to develop a complete Computer-aided Scheme Design System presently.

本文在全面分析、综合了机械运动方案设计的发展历史与现状后，提出了建立机械运动方案自动化设计支持平台过程中的5个关键问题，并针对这些关键问题从设计理论、实现方法和应用等方面进行了系统、深入的研究。

Based on the research results of Chaos theory, in this dissertation, it has made detailed analysis of the chaotic signal generator. Firstly, the characteristic and various detection methods of chaotic signal are recommended. Secondly, with the aid of software, such as MATLAB, PSPICE, EWB, etc, discussion of the process of generating chaotic signal proceeds. Through simulation, the output result of several kinds of chaotic circuit are analyzed and compared. Thirdly, aiming at Chuas chaotic circuit, through debugging, the impacts by components and parts in the circuit, such as operation amplifier, capacity, inductor, etc, has been further investigated. And then provides a new scheme to implement Lorenz chaotic system, the circuit design and analysis are presented in detail and it can be realized by the hardware of programmable arrays FPGA, the experimental results indicate that this scheme has the advantages of easy operation, flexible design and high efficiency. An application example in secure communications is also provided. Finally, through picking up the characteristic parameter-Lyapunov exponent of the Chaos we can analyze the performance of different chaotic signal generators.

本文在混沌理论研究成果的基础上，对混沌信号的产生做了详细的分析，涵盖以下内容：首先介绍了混沌的定义，混沌信号的基本特性和各种判别方法，特别是对简单的一维Logistic映射的硬件实现问题做了初步探索；其次对混沌信号的产生方法进行讨论，借助于MATLAB、PSPICE、EWB等仿真软件，对几种混沌电路输出的混沌信号进行了分析比较，并在此基础上针对典型三阶连续自治系统Chua's电路作进一步实验研究，通过混沌电路调试，深入研究电路中各元器件，特别是运算放大器、电容、电感等对混沌信号时域以及频谱的影响；再次研究连续混沌系统的数字化硬件产生，设计了Lorenz混沌电路在现场可编程门阵列FPGA上实现的新方案，在保密通信中的应用实验结果表明该方案具有操作简单、设计灵活、效率高等优点；最后针对不同混沌系统，采取不同算法，提取混沌特性参数Lyapunov指数，进而对不同的混沌信号发生器的性能进行了分析。

On this basis a design scheme of the database for SCADA based on the component object model is presented, in which the content and background of IEC 61970 standard is introduced first, then some different component model are assayed , then a design scheme of the database for SCADA based on the component object model is presented, the foreground application of SCADA is connected with the database by components.The new model have some advantages: system have disrelation with develop language ,the peculiarity of COM make the system fit in with different apply program developed with different language;(2) the system can be modified and upgraded easily by means of upgrading the component modules;(3) the system can be enlarged easily by means of adding the new component modules without quiet amendment in old system.

为此，本文介绍了一种基于组件对象模型的SCADA数据库系统设计方案，文中首先介绍了IEC61970标准的内容及产生背景，分析了几种不同的组件模型，在此基础上，提出了一种基于COM组件技术的SCADA数据库设计及访问模式，在此模式下根据SCADA数据库不同的功用划分了不同的组件模块，利用组件连接数据库与SCADA前台应用，基于组件技术的SCADA数据库设计有以下一些特点：(1)与语言无关性，COM的特性决定了此系统上可以应用不同语言开发的应用程序；(2)系统易修改及维护，用户可以通过更新组件模块的方式修改及维护系统；(3)系统易扩展新的功能，用户可以通过开发新的组件方式将新的应用与原系统结合，而不用对原系统做很大的修改。

The key technique of this design scheme was to use SOPC technique based on Nios II to construct the hardware and software system of home gateway. Considering the programmable feature of FPGA and the portable feature of IP core, the design scheme solved effectively the incompatibility and importable disadvantage of conventional embedded home gateway.

该方案以基于NiosⅡ的SOPC技术为核心，构建家庭网关的软硬件系统，充分发挥了FPGA的可编程特性和IP核的易移植等特点，有效弥补了传统嵌入式网关的兼容性差、不易移植的缺陷，对家庭网关的设计与开发作了有益的探讨。

It is convenient to evaluate and optimize many kinds of design scheme of the inking system and could store and redact the design scheme. The software could provide accordance for the designers and the users. 4. The experiment on the PZ1650 sheet-fed press was performed for getting the indexes of the inking system.

3软件具有较强的实用性，能够对同一种方案在不同参数设置条件下进行仿真计算，也能够对不同方案在相同参数设置条件下进行仿真计算，便于设计方案的对比和优化，并能对各种输墨系统的设计方案能够进行编辑和存储，为设计和使用人员提供依据。

A safety level-based evacuation scheme of subway station is presented in this paper, with performance-based evacuation design combined. According to the evacuation characteristics of subway station, accidental evacuation time and available safety evacuation time under smoke control have been classified into three safety levels respectively. Then four safety levels have been proposed based on them. A flow chart of safety evacuation scheme of subway station under fire was then proposed based on the guidelines of safety evacuation and code for design of metro.

针对地铁车站人员疏散特点，以人员安全疏散准则和现行地铁设计规范为基础，融合了火灾安全工程学的性能化人员疏散设计思路，分别将事故疏散时间和烟控可用安全疏散时间划分为三个等级，综合形成了四类人员疏散安全等级标准，并在此基础上提出了框架性的基于安全等级的地铁车站火灾人员安全疏散方案设计流程。

In the second part, by using uniform design and orthogonal design methods, some groups of mix test of foam lightweight with different component are conducted, the test data is analyzed by neural networks model and regression model, and optimum mix proportion is obtained. Orthogonal design for mix material considering density factor is presented, as well as uniform design for mix material adapting to different density. The mechanic characteristics of foam lightweight material and engineering characteristics differing from general material under an allround press are founded. Through the analysis of asymmetry settlement for Doulong sluice and the comparison of correct deflection scheme, the foam lightweight material shows some advantages in the load reduction.

在泡沫轻质材料的研究方面，利用均匀设计和正交设计方法进行了几组不同组分的泡沫轻质材料的配方试验，利用神经网络模型和回归模型对试验数据进行处理，得出最优配方；提出了考虑密度因素的混料配方的正交设计方法和适合不同密度时的混料配方均匀设计方法；研究了泡沫轻质材料的力学特性，并发现了在围压作用下所表现出的不同于一般材料的工程特性；论文将上述研究成果用于斗龙港闸工程的处理设计，通过对该闸的不均匀沉陷分析和各种纠偏方案比较表明，采用泡沫轻质材料进行减载处理有一定的优越性。

The paper discusses the method of design parameters predigestion guided by Rough sets and apply concept climb based on attribute to design Database, thus we can obtain relation rules between design parameter and design scheme from all kinds of abstract hierarchy and different point of view.

并且将基于属性的概念爬升技术应用到设计知识数据库中，可以获得不同抽象层次、不同角度描述的设计参数与设计方案之间的关系规则。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。