查询词典 scheme design

In this thesis, I summarize the theoretical calculation method, applied scope and notice of siphonic drainage system, and point out the advantage of siphonic drainage system compared with gravitation drainage system. In the archetype experiment study of siphonic drainage tube, I adopt different tube diameter and different structural height to survey the drainage volume and press in different place. I observe various kinds of flow state, and get chief factors which influence hydraulic peculiarity of system as the tube diameter or structural height, and find out the relevance of factor to flux. I apply CFD Fluent software and adopt standard k-ε model and RNG k-ε model, then use finite volume method and second-order upwind scheme to discrete numerical model, while coupling numeration of velocity field and press is based on SIMPLE. In the numerical simulation of curved part of tube, siphonic drainage tube experiment system and multi-outlet siphonic drainage system, I make research on internal velocity and press of system in different project condition by changing the tube diameter of curved part, negative press value in tube export and improving the quantity of water gutter. This thesis first adopts a method of combining archetype experiment and numerical simulation to study the siphonic drainage system, test and verify the validity of experiment and numerical simulation, and makefurther study on system, it solves the problems of limited testing conditions, and has a logical results, it can provide a valid method for optimizing and designing the drainage tube-net system. The conclusion have referring value for study and design of siphonic drainage system.

本文首先对虹吸式排水系统理论计算方法、适用范围以及注意事项做出总结，并分析了虹吸式排水系统的优势；再对虹吸式排水管道进行原型试验研究，采用不同管径不同立管高度，对系统流量、管道压强进行量测，观察了各种工况下的流态，对其水力特性进行研究分析，找出影响水力特性的落差、管径主要因素以及与排水量的关系；进一步应用计算流体力学Fluent软件，采用标准κ-ε模型与RNGκ-ε模型，计算过程应用有限体积法和二阶迎风格式对数值模型进行离散，速度和压力的耦合采用SIMPLE算法，分别对系统弯管段、虹吸排水管道试验系统、多斗虹吸式排水系统进行数值模拟分析，通过改变管段弯头处半径、管段出口负压值、增加雨水斗数对不同工况下系统内部的速度和压力进行研究；本文首次采用结合原型试验与数值模拟相结合的方法，对虹吸式屋面雨水排水系统进行研究，试验与模拟相互验证，并进行拓展，很好地解决了虹吸式屋面雨水排水系统由于试验条件限制问题，结果正确合理，为排水管网系统设计和优化研究提供了有效的方法，对工程设计有较好的参考价值。

In chapter 2, we i lluminate the design scheme for satellite earth slat ion.

第2章中对卫星地球站的设计方案进行了介绍。

The complet block design and the come true scheme of SCADA system afer inported OPC technology was decribed in this paper. Also the function of the slave station、 communication network、 control center was been developed and carried out in this paper.

论文中介绍了引入OPC技术的SCADA系统的整体设计及实现方案，完整的开发并实现了SCADA系统的从站、通讯网络及控制中心的功能。

According to the function requirements of siren control system, the design scheme of a smart terminal and its realization are given in details.

本文围绕实际的警报控制系统功能要求，提出智能化执行终端的设计方案和实施方法。

On the basis of the conventional design means of DC side filtering equipments in HVDC transmission system, multi-object programming optimizing method with two objects: investment and operation fare and the constrain condition of equivalent interfering current limit is presented to get a generally optimum scheme for DC side filtering equipments including smoothing reactor, filters and capacitor at neutral bus in this paper.

本文基于高压直流输电系统直流侧滤波装置传统的设计方法，提出了以投资费用和年运行费用为目标、等效干扰电流满足标准要求为约束条件的多目标规划设计方法，对高压直流输电系统直流滤波装置(包括平波电抗器、直流滤波器、中性点冲击电容器)进行综合优化设计。

Expound clearly the development of the DCS, and the basic structure and the work principle of the DCS and the application at the industry spot of last years, analyzed emphasesly characteristic and constitutes of ECS-100 DCS Zhejiang soupcon Co., LTD. The thesis mostly introduced application of the DCS to urea manufacturing process , and the DCS control, including the control scheme of the DCS design, the controller configuration of the system, and the whole course of the engineering actual and so on.

本文对集散控制系统的发展过程进行了综述，介绍了集散控制系统的基本结构和工作原理，介绍了集散控制系统的发展趋势及近几年来集散控制系统在工业现场的具体运用情况，并介绍了DCS在锅炉控制中的详细应用，并对齐整个过程进行了设计，包括控制方案的设计，系统的组态，直至最后的工程实施等等。

In this paper, the technique of undersampling is discussed, the design scheme of the software SSB receiver is proposed.

本文在讨论了欠抽样技术在软件单边带接收机中的应用的基础上，提出了一种对中频信号直接采样的软件单边带接收机的软硬件实现方案。

The results prove that our scheme meets the design strength and stability conditions.

结果证明本方案满足设计强度和稳定性条件。

This paper analyzed the research process of the stable laser source and presented the feasible design scheme.

本文较为系统地分析了稳定光源的研制过程，并提出了切实可行的研究方案。

In the course of engineering design and construction,analyses and comparison different kinds of governing scheme and governing step,chooses rational protecting means and correlation stuff,by practice and staidness analyse,to sum up experience,get out conclusion and some taste,...

在工程设计与实地施工过程中，分析比较各种治理方案和治理措施，选取合理的防护方法和相关材料，通过实践和认真分析，总结经验，得出结论和一些体会，为今后的设计施工提出建议。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。