查询词典 closed system

In the second chapter, we consider a kind of Kolmogorov system. The sufficient condition for nonexistence of the closed orbit and existence of the unique and stable limit cycle are obtained by using divergence integral, Poincare-Bendixson theorem and Zhang Zhifenunique theorem.

第二章讨论了一类Kolmogorov系统，利用发散量积分、环域定理和张芷芬唯一性定理，得到了该系统无闭轨的充分条件和存在唯一极限环的条件。

In the second chapter, we consider a kind of Kolmogorov system. The sufficient condition for nonexistence of the closed orbit and existence of the unique and stable limit cycle are obtained by using divergence integral, Poincare-Bendixson theorem and Zhang Zhifen\'unique theorem.

第二章讨论了一类Kolmogorov系统，利用发散量积分、环域定理和张芷芬唯一性定理，得到了该系统无闭轨的充分条件和存在唯一极限环的条件。

This algorithm was realized by minimizing the invariant ellipsoid of the closed loop system. Some sufficient conditions dependent on the invariant set for the satisfaction of the time domain hard constraints were also derived.

在系统初始状态小于某个界的情况下，将性能输出的能量作为优化的性能指标，通过最小化系统的不变椭圆域来实现系统优化控制，同时得到依赖于该不变域的满足时域硬约束的充分条件。

this paper apply design patterns and principals "open closed principle","dependence inversion principle", and "liskov substitution principle" to construct a system framework which support all sorts of databases, and supply a method for exchanging different database systems by configuring parameters.

本文应用"开－闭原则"、"依赖倒转"、"里氏代换"等设计模式和原则，构造了便于扩充数据库类型的系统架构，给出了通过配置参数转换数据库类型的方法。

A detailed analysis of the main circuit introduction, control method and working principle of the direct-drive wind energy conversion system are given to introduce the two important parts a of this paper: First part is the control method of the multiple boost convertor, the important instantaneous current control method of this paper is given through the analysis of the main circuit structure, control method and working principle. Then a steady-state analysis for low-frequency, a high-frequency component analysis, and a closed-loop tracking performance analysis for dynamic response are provided to analyze the method proposed; And the second part is the control method of invertor.

在系统变流器整体结构分析的基础上，引出本文重点研究的两个变流环节的控制：第一部分是系统升压斩波器的控制，通过分析相关主电路结构、原理，建立了数学模型，引出本文重点研究的瞬时值控制策略的概念和具体实现，并对升压斩波器的瞬时值控制策略进行了详细的高频、低频模型分析和稳态、动态性能分析；第二部分是系统并网逆变器的控制，通过对逆变器主电路的数学建模和控制要求分析，研究了并网逆变器的瞬时值控制策略，包括电感电流控制内环和直流电压控制外环的具体设计和实现方法。

According to hardware design,control system of equipment is studied which transducer closed-loop control is at the core.The equipment can eject stable and isopiestic pressure water jet,and display the current pressure of water jet real time.

根据硬件设计，研究了设备的控制系统，主要以变频器闭环控制电机为核心，使喷嘴射出稳定、恒压的水流，并实时显示当前的水射流压力。

Improperly closed disks can also be recovered by the software The software will likely be able to identify missing or corrupt data on the ISO/Joliet discs even if they have a damaged file system using.

不当关闭磁片也可以收回，由软件软件，将可能能够查明丢失或损坏，数据和有关国际标准化组织/ joliet光盘，即使他们有一个损坏的文件系统使用。

It is proved that the block diagram of SISO closed-loop system model has physics limitation, because Kirchhoff's Law can not act in it.

用等效电路导出负反馈放大器A、r、f、f等解析式关系式，它能完整、准确描述不同电路反馈机制对放大器性能产生的不同影响。

The closed-loop bandwidth of the system reaches 10Hz which assures the error of amplitude less than ±10% and the lag of phase less than 10°.

系统的性能指标达到幅值误差在±10%以内、相位滞后小于10°时，闭环频宽为10Hz。

In the second chapter, we consider a kind of Kolmogorov system. The sufficient conditions of nonexistence of the closed orbit and existence of the unique and stable limit cycle are obtained.

第二章讨论了一类Kolmogorov系统，得到了系统无闭轨的充分条件和存在唯一稳定极限环的条件，推广了颜向平，张存华等的结果。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷