查询词典 variable-density system

The widely use of variable frequency speed regulation system and its importance of fault diagnosis were introduced in this paper.

摘 要：本文介绍了变频调速系统的广泛应用及其故障诊断的重要性。

The hardware of variable frequency speed regulation system based on TMS320LF2407A is designed .

本文设计了基于TMS320LF2407A异步电动机变频调速系统的硬件。

Experience and reference are provided in applying the TMS320F2427A to variable frequency speed regulation system.

本研究为应用TMS320LF2407A实现变频调速装置的产品化提供了经验和借鉴。

Calculation and analysis are made on the variable pressure operation capabilities of the water wall system, superheater and reheater systems of the 300MW once-through boilers of Chinese design and evaluations of the fatigue life of major components are given based on the results of the analysis.

本文以计算分析为手段，对国产30万千瓦直流锅炉的水冷壁系统、过热器及再热器系统的变压运行能力进行了分析，并对主要部件的疲劳寿命作出评价。

A new switching scheme to the gain of variable structure control signals is proposed. The following important open problems in standard VS-MRAC and MRAC are solved by using the scheme: 1 . a prespecified transient and steady-state performance index for tracking error can be achieved without requiring any information about the plant high frequency gain sign when relative degree of modelled part of plant is one, and 2 . it is shown that as long as the performance indexes are guaranteed for the auxiliary errors, each of which in dynamics is a sub-system with relative degree one, the tracing error will converge to a small residual set in a prespecified transient time when relative degree of modelled part of plant is greater than one.

提出了一种控制增益可切换的变结构自适应律，解决了如下变结构模型参考自适应控制（包括基于调参律的模型参考自适应控制）理论研究中长期没有解决的问题：当对象建模部分相对阶为1、高频增益符号未知且存在非线性输入扰动和未建模动态等情况下，系统跟踪误差可满足预先给定的动态和稳态性能指标；当对象建模部分相对阶大于1且存在非线性输入扰动和未建模动态时，可保证系统跟踪误差在预先给定的过渡过程时间内收敛到一个残差集中； 5。

It is found that: the standard Model can be used to predict flows at the station and resultant velocity and temperature field under some reasonable presumptions; the impact brought by stopcock wind is variable according to the different tunnel structures; the temperature of is related with the distribution of heat load; the VAV system has advantage in energy saving, but when the air volume reduced to a certain degree, we should consider the alteration of rising the temperature of supply air, and increasing the quantity of it.

研究表明：采用合理的假设，标准的湍流模型能够较为准确地模拟和预测地铁站台的温度场与速度场；活塞风对站台的影响随区间形式的不同而不同；空调送风温度的设定与负荷的分布情况有密切的关系；针对站台空调季全天的负荷变化，VAV环控方案可以达到节能的目的，但在风量过小时，适当考虑采用提高送风温度，加大送风量的方法进行局部的调整。

The whole multi-Agent system runs based on the continuous communication among agents. The architecture of the cloverleaf is variable, the beeline, the round curve and the convolute curve is the basic elements for the plane curves,the longitudinal gradient reflects the change of the vertical section. We consider sufficiently these specific factors in building road Agent. The different parameters are set to describe the geometrical characteristic and traffic characteristic.

立交枢纽的线形多变，直线、圆曲线与缓和曲线为平面线形组成的三个基本要素，坡度反应纵断面的路线起伏，本文在建立路段智能体中充分考虑了这些立交枢纽的特有要素，为每个智能体设置了不同的几何特性及交通特性，并在决策单元中加入对车辆驶入、换道、超车、限速等的智能控制模型，使得车辆智能体能够在由路段智能体相互连接组成的立交枢纽上正常行驶。

In addition, this paper has also studied some other problems related to the spherical robot, such as, smooth time-variable controller to nonholonomic system, mechanism of rolling friction, and so on.

另外，本文还对非完整系统的光滑时变控制器设计方法和滚动摩阻的作用机理等相关问题进行相应的理论分析和研究。

Finally, tests of following crop row showed that shadow removal method based on illumination invariant image satisfied real-time requirement of system and improved the robustness of extracting navigation parameters under variable daylight illuminants.

最后，通过作物行跟踪试验表明，基于光照无关图的阴影去除方法不仅满足了导航实时性的要求，而且使农业机器人在光照变化的情况下导航参数提取的鲁棒性有了更大的提高。

According to the requirement of vibrating signal detection, this paper designs a multi-channel data acquisition system, which has a programmable signal amplifier, variable sample rate and sample time.

论文针对振动信号检测中数据采集和频谱分析的需要，设计了一种基于USB2.0的数据采集和谱分析系统。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。