查询词典 essential parameter

Combined system simulation with optimal control, selected a typical water cooled primary/secondary chilled water system, used the research achievements of Annex 30 in IEA for the reference, this work firstly presents both the basic component models and the control system component models. Secondly gives the main models for parameter identification and experiment validation. Finally a dynamic digital simulator is set up using TRNSYS as the platform to substitute a real system to test and evaluate some kinds of online optimal supervisory control strategies after giving some essential data file input and finishing all the PID controllers'tuning.

本文将空调系统的仿真模拟与优化控制相结合，首先选择比较典型的水冷式二级泵集中空调系统，在国际能源组织IEA第30子课题Annex 30多年研究成果的基础上，建立了系统各设备的部件模型和控制系统部件模型，对主要模型参数的辨识方法进行分析，同时对其准确性给予验证；在此基础上，建立了以TRNSYS为仿真平台的集中空调水系统数字仿真器；通过必备数据文件的输入和对所有下位机控制回路PID参数的调试，最终完成可用于评估各种上位机优化控制方案的空调水系统数字仿真器。

According to our country condition of the superfine Merino sheep breeding, producing and marketing, and consider the future quality trend in a period of time, calculating to establish essential economics , biology and breeding technique parameter, and to establish 3 type and 6 production traits objectives.

根据我国超细型细毛羊的育种、生产和市场条件，并适当考虑未来一段时间的发展趋势，计算制定了育种目标所必需的经济学和生物学、育种技术参数，并制定了包括3类6个生产性状的育种目标。

Shear wave velocity is a parameter that geophysicists always want to obtain and is essential in AVO forward modelling. But at present there is no effective method to calculate shear velocity.

横波速度一直是地球物理学家非常希望得到的，也是AVO正演模拟必不可少的参数，而目前缺少具有理论基础的计算横波速度的方法。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。