查询词典 variable-density system

To analyze the dynamic performance of hydraulic hybrid vehicles and to optimize the main design parameters of the hydraulic system, the mathematical models of the hydraulic system are established, which includes bidirectional variable-displacement motor, hydraulic accumulator and other components. The relation between polytropic exponent of bladder accumulator and variation rate of gas volume is defined.

为了分析液驱混合动力车辆的动态特性并优化液压系统的主要设计参数，建立了液压系统双向变量马达、液压蓄能器及其它主要元件的数学模型，定义了气囊式液压蓄能器的多变指数和气体体积变化率之间的关系。

Because the steady state probability of the M/G/inf queuing system is related to the average packet length only and not related to the distribution of packet length, we propose M/M/inf model for the DS CDMA/unslotted ALOHA system with variable number of fixed-length packets. The analyzed throughput of M/M/inf queuing model is closer to the simulation throughput than the analyzed throughput of M/M/1 queuing model is.

由於M/G/inf在稳定状态下的机率只与平均封包长度有关，与其分布状况无关，所以我们提出M/M/inf模型来分析直接序列分码多工/非同步阿罗哈系统同时拥有可变的固定长度封包数。M/M/inf排队模型生产效能分析结果会比M/M/1排队模型的生产效能分析结果更接近系统生产效能的模拟曲线。

One two-steps variable resonance pipe-length of induction system has been excogitated and the control strategy was put forward. Using this system, the max.

用长进气管则谐振转速低，可提高低速范围的充气效率，从而提高最大转矩；用短进气管则谐振转速高，可提高高速范围内的充气效率，从而提高最大功率。

Compares the EER and other parameters of this system with a typical variable air volume all-air system and analyses each application scope for different systems.

与一典型全空气变风量系统的能效比等参数进行了对比，简要分析了不同种类系统的适用范围。

The basis builds tigidity and model of system of float of stretch orbit magnetism, through comparative analysis, designed improvement double-loop PID algorithm, carry the condition variable with appropriate feedback, can solve Ou smoothly to system of vibration of car course coupling, implementation stabilizes control.

根据建立刚性和弹性轨道磁浮系统模型，经过对比分析，设计了改进的双环PID算法，通过反馈合适的状态变量，能够对车轨耦合振动系统顺利解耦，实现稳定控制。

Basing on a profound research of logistics system of coal wharf"s discrete characteristic, and meanwhile, according to the practical running data, it sets up the main random variable model of coal wharf"s logistics system.

在对煤炭码头物流系统的离散性特征深入研究的基础上，根据码头实际运营数据，建立了煤炭码头物流系统主要随机变量模型。

The results show that the designed system can realize the Variable-frequency Control System of Boiler Feed Water.

现场使用结果表明，实现了锅炉给水变频控制。

Lightened on the turbine valve controller designed with feedback linearization theory and introduced nonlinear tracking-differentiator, a novel nonlinear PID valve controller was proposed. This controller can fit not only to plant with some model error and random disturbance in variable, but also to the variety of the structure and operating conditions of power system. The transient and dynamic characters of the controller are both satisfactory when big and small disturbances added. The good performance, wide stable margin and heavy robustness of the valve controller proved that it is a great practical application to enhance the stability of power system.

结合反馈线性化法汽轮发电机组的汽门控制研究成果，引入非线性跟踪微分器和非线性度变换控制，进行了发电机组的非线性PID汽门控制器设计，该控制器不仅能适应一定的系统模型误差与变量的不确定性干扰，而且对于电网结构和运行工况的变化有着较强的适应能力，在受大、小扰动的情况下，呈现了较好的暂态特性和动态品质，具有较好的控制品质、较高的稳定裕度和较强的鲁棒性能，有利于进一步改善电力系统的稳定性，显示了其较强的实用性。

As for variable speed constant frequency wind power generation system, the design and control of doubly-fed induction generator directly relate to the economic cost of generation system and operation efficiency of units.

在变速恒频风力发电系统中，双馈异步发电机的设计和控制直接关系到系统的经济成本和机组的运行效率。

The main products are: all kinds of out of style, power distribution cabinets, as well as fixed capacitance cabinet; central air-conditioning automatic control system; a variety of lighting boxes, wall-mounted box, outdoor waterproof box, meter boxes, power boxes; a variety of fire control box , joint boxes, console; a variety of dual-power switch box, since the lotus root decompression starter boxes, variable frequency constant pressure water supply system.

主要生产的产品有：各种抽出式、固定式配电柜以及电容柜；中央空调自动控制系统；各种照明箱、挂墙箱、室外防水箱、电表箱、动力箱；各种消防控制箱、联动箱、控制台；各种双电源切换箱、自藕减压起动箱、变频恒压供水系统。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。