查询词典 variable-density system

In this paper,the generalized equations of variable mass for high-order nonholonomic mechanical system in noninertial frame are de- rived by the universal D Alembert s principle and an example is given to illustrate the application of these equations.

本文由万有D'Alembert 原理导出变质量高阶非完整系统相对于非惯性系的广义方程，并举例说明其应用。

An improved method for adaptive decoupling controller was p roposed. A rectified RLS method was used for iˉ dentifying the linear model and a neural network was used for app roaching the coupling, nonlinear and unmodeled dyˉ namics. So the control precision and robustness of the system can b e improved, and it can solve the nonlinear uncertain multiˉvariable coupled problem.

设计了一种改进的自适应解耦控制方法，即采用修正的RLS算法辨识系统线性部分的模型，用神经网络来逼近通道间的耦合、非线性及未建模动态项，进而增强了自适应控制的精度和鲁棒性。

The core of the system is DSP controller TMS320LF2407A made by TI ,the motor obtained the signal of rotor position by testing the Back-EMF,got s tarting by variable frequency and fixed-speed running by forming a close-loo p with the method of Phase-Locked Logic.

从微处理方面来讲，TM S320LF2407A是TI公司为运动系统控制设计的专用D SP芯片，与传统的微处理器，如51，96系列单片机相比，该芯片在处理速度，控制精度以及集成度方面都有很大优势。

The experimental results show that the performance of variable air volume box is improved effectively through the combination of inverse system design method and quadratic optimal control.

逆系统设计方法与二次型最优控制技术相结合能有效地改进和提高变风量箱的控制品质和性能。

At the end, using back-stepping technique, control laws are designed for each control variable to guarantee the globally uniformly ultimately boundedness of all state variables and the convergency of system output.

控制规律的设计仍采用反步法(Back-stepping)，对于每个不确定项，都设计了一个动态估计环节以应对其影响，最终保证了全部状态变量的一致最终有界性和系统输出的收敛性。

By the balance of communication link power, SNR balance guidelines and BER balance, under the base to meet the requirements of systems and not affecting thequality of call. Finally, the open-loop/closed-loop variable step length reverse power control is introduced, its principle is under the original open-loop power control to select suitable power control step by the new power control bit, and achieves a balanced system fastest and most effective.Keywords: Step, Power-control, Brethren interference, Proximity effect

依据通信链路的功率平衡准则、信噪比平衡准则和误码率平衡准则，在满足系统要求和不影响通话质量的基础上，最后提出了开环/闭环可变步长的反向功率控制，其原理是在原有的开环功率控制的基础上，依据新的功率控制比特，来选取合适的功率控制步长，以最快、最有效的方法使系统达到平衡。

Discharging ballast water with compressed air needs not to install ballast water pump unit that is necessary for pump discharging and simplifies ballast water pipeline system, reduces ship weight, improves the variable loading capacity of marine platform and finally promotes economic benefits.

采用压缩空气来控制与调节半潜式海洋平台或工作船舶的上浮及下潜，是借鉴潜水艇沉浮原理而设计的一种新型压载水排放模式，使用压缩空气排放压载水，免除了使用水泵排放所必须安装的压载水泵组并简化了压载水管系统，减少了船舶的自重，提高了海洋平台的可变载荷量，提高了经济效益。

In accordance with the characteristics of shoe press and the design of sleeve,the paper discusses the factors to be considered in felt design,in particular,the variable parameter of system void volume and puts forward the cleaning and adjusting measures for shoe press felt.

根据高速纸机上靴型压榨的特点和靴套的设计，论述了靴压毛布设计时要考虑的因素，尤其是系统空隙率这一变量参数；提出了靴压毛布使用时清洗和调整的措施。

The four clutches are used to distribute the driving force generated by the electric motor and combustion engine via four fixed ratios and two electric variable ratios to all four wheels on the 4MATIC permanent all-wheel-drive system, depending on the driving situation.

四离合器用于分发的驱动力所产生的电电动机和内燃机通过四个固定比率和两个电动可变比率所有四个车轮上的4MATIC永久全轮驱动系统，根据驾驶状况。

The highly efficient Atkinson-cycle engine, made possible by the Variable Valve Timing with intelligence system, allows the expansion/power stroke to be longer than the compression stroke so that combustion energy can be more effectively used for production of engine power.

高效的阿特金森循环发动机，作出与智能可变气门正时系统，可以使扩充/动力冲程要长于压缩冲程，使燃烧的能源可以更有效地用于生产发动机力量。

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。