查询词典 variable density system

In this paper,basis on mechanical structure of certain minor caliber multiple launch rocket system and tactical demand of air defense and antimissile,it is analyzed in detail that friction torque, unbalanced moment ,impact moment of burning gas flow and variable rule of moment of inertia,which provide the foundation for more research of position servo system of multiple launch rocket system.

文中依据某小口径多管火箭炮机械结构及防空反导的战术要求，对影响多管火箭炮位置伺服系统性能的摩擦力矩、不平衡力矩、燃气流冲击力矩以及转动惯量的变化规律等进行了详细的分析，为多管火箭炮位置伺服系统的进一步研究提供了依据和基础。

This paper mainly involves the design of fuzzy control system based on the variable universe method and the design of adaptive fuzzy control system based on the universal approximation theorem of fuzzy system.

本论文主要涉及变论域模糊控制和基于模糊系统泛逼近理论的自适应模糊控制两个方面的内容。

Based on surveying the development of variable frequency power supply and analyzing its development tendency, and considering the practical features of the assignment, the conversion system is designed as follows: it selects the 3-phase Pulse Width Modulation Engine SA4828 as the PWM control signals generator; it chooses the single-chip-computer PIC16F877 as the microcontroller, which integrated the A/D modulation, which cuts down the complexity of the hardware system and strengthens the dependability of the system.

在论述和分析了变频电源及其控制技术发展的概况和趋势的基础上，结合本课题任务的实际要求，设计了一套中小功率的逆变电源。系统中PWM控制信号采用专用集成芯片SA4828生成，减轻了控制器的工作量也提高了系统的可靠性。控制器选用集成了A/D转换器的单片机，使得系统的硬件复杂性降低，提高了可靠性。

In order to prove the global asymptotical stability of the endemic equilibrium, we introduce the change of variable which can reduce our original four-dimensional system to a three-dimensional asymptotical autonomous system with limit system.

利用复合矩阵理论以及竞争系统的Poincaré性质排除了渐近自治三维系统的极限系统周期解的存在性，进而利用极限方程理论得到了原四维系统地方病平衡点的全局稳定性。

Aiming at large-size steam turbine DEH governing system is complex and difficult to evaluate their conditions, a method of variable weight synthesizing condition evaluation of DEH system is firstly proposed on the basis of analysis on the condition effecting factors of DEH system.

针对大型汽轮机组数字式电液调节系统复杂，难以评价状态的问题，在分析反映系统运行状态各因素的基础上，首次提出了基于变权综合的数字式电液调节系统状态评价方法。

A new discrete reaching law is presented to improve the reaching process of discrete exponential reaching law.The discrete-time variable structure control system designed by this reaching law can not only weaken the chattering and control the system state approach to zero diminishingly,but also keep the basic property of quasi-sliding mode which can cross the switching surface step by step.This method improves the reaching process and enhances the control quality of the control system.

为了改善离散指数趋近律的趋近过程，提出了一种新的趋近律，利用该趋近律设计的变结构控制器，不仅能够大幅度削弱抖振，使系统运动最终趋于原点不存在稳态振荡，而且能使系统的准滑动模态保持步步穿越切换面的基本属性，有效地改善了趋近过程，提高了控制品质。

The government is an external variable of circular economy, which must offer basic system space for the efficiency of property system and technology innovation system.

政府是循环经济的外生变量，必须为产权制度和技术创新制度的效率提供基础性制度空间。

Through the characteristic parameters, the system's real-time moment of inertia is given. Then golden section adaptive control law and logic derivative control law both based on moment of inertia are designed. The two kind of control laws are combined to control the attitude of spacecraft and their simulation results are compared with the ones of PD control law which is designed based on the certainly-known system model. The results show that this adaptive control law is effective on the kind of time-variable system studied in this paper.

根据特征模型的参数推算了系统实时的转动惯量，设计了基于转动惯量的黄金分割自适应控制器和逻辑微分控制器，将这两种控制器相结合对带有可伸缩挠性附件的刚体进行姿态控制，仿真结果与基于确知系统模型所设计的变系数PD控制器相对照，表明了该自适应方法控制一类时变系统的有效性。

The variable flow solar heating system, which is proposed in this paper, provided a new idea for the design of heating system in a small town. The system will improve indoor thermal comfort and reduce environmental pollution.

本文所构造的变流量太阳能采暖系统为小城镇采暖设计提供了一条新的思路，既有利于提高小城镇居民的室内热舒适性，又有利于减少对环境的污染。

Engineering, Procurement, Construction Management for SAG Mill with trommel including all auxiliaries like mill relining machine, bolt removal system, variable frequency drive, on line charge measuring system, automatic ball charging system etc.

对SAG磨机及滚筒筛的工程、采购与施工管理，其中包括所有辅件如磨机制动带机、螺栓拆除装置、变频机、在线装料检测系统与自动磨球装料系统等

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。