查询词典 two-pipe system

Based on the equivalent-two-machine-two-area AC/DC parallel system, a time optimal control plan for a second-order oscillation system is developed and a TOC strategy for quickly suppressing interzone disturbance is proposed.

为了快速平息交直流互联电网的区间扰动振荡，基于等值两机两区域系统推导了2阶振荡系统的时间最优紧急直流功率支援控制策略。

High-grade advanced machinery and equipment is assumed business hardware security, the people Langfang Founder Phototypesetting owned printing system, the two groups are the four American Oriental color back 48 reported high-speed offset rotary printing machine, two rotary Taipei production, the two Taiwan Strait Fort off four-color, two quarto four-color printing presses, a four-color printing octavo; Beiren producing two-color, single-, double-sided offset platforms five books, domestic laminating machine, cutting machine palpable , UV, indentation machine, as well as fine books, paperback double booking packages and other major equipment.

高档先进的机器设备是业务承担的硬件保障，廊坊人民印刷厂拥有北大方正照排系统、两组美国东方正四背四八色高速胶印轮转印报机、两台北人产轮转机、两台海德堡对开四色、两台四开四色印刷机、一台八开四色印刷机；北人产双色、单、双面平台书刊胶印机五台、国产复膜机、扪切机、UV、压痕机以及书刊精、平装双套装订机等主要机器设备。

The Iterative Learning Control must be used on a repeatable or a peridocital system. By using motion time and iteration times as the two orthogonal vectors, a two-dimensional control system is construct, which can discribe the attribute of the dinamic behavior and learning process completely.

反覆式学习控制必须应用於具有反覆性或周期性的系统，文中将以运动时间与学习次数作为二正交向量来架构二维控制系统，使其能够完整的描述控制系统本身的动态行为与学习过程的特性。

On the base of applied tech. and system structure, the key tech. are expressed in detail. It includes:Knowledge representation technology: it is described in two stages by "Depictive frame + Rule group"."Depictive frame" is used to reflect the factors concerning question field."Rule group" reflects the son-question in question field; knowledge management system: it is made up of knowledge-base editing component, factor classifying component, knowledge inspecting component and extractive knowledge component; uncertainty reasoning adopt method of elicitation search strategy and data drive controlled by member knowledge. It take reliability of compound proof at first. That can resolve the matching contradiction. Reasoning explanation introduce pre-text and followed method of resolving path. Knowledge discovery component take SLIQ as basic arithmetic. It provides classification model in two stage forms which aim at training suit. That is decision tree and productive rule.

在确定应用技术与系统结构的基础上，重点阐述了本文的核心技术，这包括：知识表示技术，采用"描述框架+规则组"的层次结构，"描述框架"用于描述问题域所涉及的因素，"规则组"反映问题域内的子问题；知识管理系统，由知识库编辑构件、因素分类构件、知识检测构件和知识求精构件组成；不确定性推理机采用启发式搜索策略，元知识控制的数据驱动，以复合证据可信度优先作为匹配冲突消解的策略，推理解释采用预置文本与求解路径追踪的方法；知识发现，采用SLIQ快速可伸缩算法，分类模型用判定树与产生式规则两种形式描述。

The algorithm is proved to be convergent theoretically and implemented for numerical calculation.Thirdly, two kind problems of multi-unit system maintenance based on the discrete-state deterioration model are analyzed:To achieve the optimization aim of series system consist of two types of units with different failure mode, an opportunistic policy is presented to combine the corrective and condition-based maintenance. The optimal model based on this policy is built and an iteration algorithm based on sequential decision is proposed according to the characteristic of discrete-state deterioration model.

第三、在部件优化分析的基础上，针对基于离散状态劣化模型的多部件系统视情维修决策中的两类典型问题，提出了相应的机会维修策略和优化分析方法：(1)针对串联系统由分别采用视情维修和事后维修的两类部件组成的情况，提出了一类事后维修与视情维修相结合的机会策略，建立了相应的多部件系统维修优化模型，并根据离散状态劣化模型的特点，提出了一类基于序贯决策的求解方法。

In chapter 5, considering an AC/DC system that includes two DC lines. Based on feedback linearization in the nonlinear systems and linear quadratic optimization control theory in the linear system, two new nonlinear additional controllers are designed in the same time.

第五章针对包含两条直流传输线路的交直流互联系统，采用状态反馈精确线性化方法与线性系统的二次最优控制相结合的方法，同时设计了两条直流线路的非线性附加控制器。

I point out that mechanics does not provide adequate foundation for the description of all natural phenomena. We should have a new understanding that in the 'change of location' of the same event of inertial system there exist two different reference systems that are mutually in uniform rectilinear motion. This new understanding will avoid the puzzle brought about by physicists' obscure yet obdurate conception as to which of the two mutually uniformly moving reference systems is not related to the inertia reference system.

我指出力学为一切自然现象描述所提供的基础是不够充分的，重新认识惯性系的同一事件"位置的改变"存在着两个互相匀速直线移动着的两种不同参考系，可以避免物理学家们模糊、执着地认为惯性参考系究竟是用两个互相匀速移动着的参考系中哪一个无关所带来的困惑。

Two-phase flow system is a complex, nonlinear and dynamic system. There are interface effect and relative velocity between these two phases.

两相流系统是一个复杂的非线性动态系统，相问存在着界面效应和相对速度，致使两相流参数检测的难度较大。

The main jobs of this paper are as followed: 1 The reuse of the frame design technology for aircraft assembly fixtures is researched. a frame line part library is built with the templet driven technology, the reuse of the frame line part come true by the tools for instantiation and instance modification. The design resources are effectively used, some repeating work is cut. 2 Two methods to obtain the assembly feature are proposed: the straight way by the Enumeration method and the indirect way by project features to the assembly plane. All of the assembly features of the frame and the adjustable bearings are obtained by these two methods which makes the frame automatic assembly technology for aircraft assembly fixtures come true. 3 The frame automatic assembly technology aircraft assembly fixtures based on assembly features is researched. A binary tree assembly model is used to express the assembly information of the frame for aircraft assembly fixtures, the automatic assembly between the frame, the aircraft and the adjustable bearing is completed within the three steps: distribute, obtain and evaluate assembly feature. Finally, the efficiency of the frame assembly design is proved. 4The frame interpart modeling technology for aircraft assembly fixtures is researched, the intersection methods are concluded and the arithmetic of the single-cut, double-cut and inter-cut intersection is proposed, the interpart fast modeling of the frame design for aircraft assembly fixture come true. 5Based on the researches mentioned before, a sub-system of frame fast design for aircraft assembly fixture is developed on CATIA. The sub-system is used to design the aircraft assembly fixtures in a large aeronautics corporation and make a good- effect.

论文的主要工作如下： 1研究了飞机装配型架骨架设计重用技术，在总结归纳骨架线框结构类型的基础上，应用模板驱动的方法建立了骨架线框库，通过骨架线框零件的实例化和离线编辑实现骨架线框的重用，有效利用设计资源，减少重复劳动； 2提出穷举几何对象的装配特征直接获取方法，遍历零件模型的几何对象，从中捕捉所需装配特征，该方法简捷、高效；提出向装配面投影的装配特征间接获取方法，该方法在现有特征基础上生成装配特征，解决了部分装配特征难以直接获取的问题； 3研究了基于装配特征的飞机装配型架骨架自动装配技术，采用一种二叉树装配模型表达骨架的装配关系，并通过装配特征的分配、获取和赋值三个步骤，实现了骨架分别与飞机产品和可调支承的自动装配，避免了繁琐的人工交互操作，提高了骨架设计的效率和规范化程度； 4研究了飞机装配型架骨架零件间建模技术，在总结归纳骨架元件相贯处理方式的基础上，提出了骨架元件单剪切相贯、双剪切相贯和互剪切相贯的实现算法，简化了骨架相贯处理的过程； 5基于以上研究，在CATIA平台上开发了飞机装配型架骨架快速设计子系统，并应用于某大型航空企业的装配型架设计，提高了设计效率和设计质量。

The basic reason about the fact that rural teacher's question emerges, has probed into the reality social current situation of two yuan structure in urban and rural areas of our country in this text, Educating the resource distribution system to cause rural education funds serious shortage directly unreasonable and in urban and rural areasly under 2 yuan structure in urban and rural areas, Author think education funds countryside educate heavy obstacles most that face rural, Society that household register system under social structure of two yuan has caused between town and country too cuts apart, Make the identity of the rural teacher discriminated against, cause rural teacher's social status to be low, The income is unfair, the living benefits are unequal , various kinds of welfare treatment can not get the due rational.

关于农村教师问题产生的根本原因，本文从我国的城乡二元结构的现实社会现状进行了探讨，城乡的二元结构下的不合理的城乡教育资源配置制度直接导致农村教育经费严重短缺，作者认为，农村教育经费的严重不足是农村教育面临的最大障碍，还有二元社会结构下的户籍制度也造成了城乡之间的社会分割，使农村教师的身份受到歧视，致使农村教师社会地位低下，收入不公平，生活待遇不平等，各种福利待遇得不到应有的合理保障。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。