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Therefore, the existence of periodic solutions for the Hamiltonian system and its equivalent differential delay equation is established.

从而建立哈密顿系统以及与之等价的时滞微分方程的周期解的存在性定理。

After 1-D approximating of electrostatic fields in the IDT, we give the basic analysis model of IDT: the Delta function model, impulse response model, equivalent circuit model, and the model parameters.

从激励产生SAW的IDT上静电场的一阶近似入手，给出了分析IDT的基本模型：δ函数模型、脉冲响应模型、等效电路模型，给出了各模型的基本特点与参数。

Not may little person still has not enough time to know American times Hua Naqi issues a website -- the United States is online has entered China again, transmitted a message again however at 10 o'clock yesterday morning, they again with unusual " low-key " the in-house personnel to Beijing company announces attitude disband, 56 employee get the demobilize fee that is equivalent to 3 monthly wages, leave in succession.

可能不少人都还来不及知道美国时代华纳旗下网站——美国在线已经再次进入中国，昨天上午10点却又传来消息，他们再次以异常"低调"的姿态对北京公司的内部员工宣布解散，56名员工领到相当于3个月工资的遣散费，陆续离开。

Methods Firstly,by definition it is proved that the minimality of a set is equivalent to the condition that the orbit of every point is dense in that set.

方法首先，利用定义证明一集合是极小的当且仅当每一点的轨道在该集合中稠密。

At least one second phase;wherein the first phase and the second phase have contrasting colors and wherein all of the phases are rheologically equivalent; and b a dentifrice dispensing means wherein the phases are in interfacial surface contact with the adjacent phase prior to extrusion from the dispensing means .

至少一个第二相；其中第一相和第二相具有对比色，并且其中所有的相为流变学相当的；和b洁齿剂分配工具，其中所述相在被挤出分配工具前在分界表面上与相邻的相接触。

This result indicates that the problem is harder than and equivalent to the derivability problem in classic logic and in Horn formula respectively, and that there are no polynomial time algorithms in both cases.

为此 ，张东摩和李未 [2 ]推广了文献 [1 ]中的结果，采用全序划分来刻画认知主体对假说中的公式在相信程度上的差异，给出了新的、基于全序划分模型的开放逻辑，其中所定义的重构具有唯一性。

Based on the equivalent circuit, the resonance frequency equation is derived and the expression of the resonance frequency is obtained.

在此基础上，得出了振子空载时共振频率方程和振子共振频率的表达式。

Furthermore, if two participating ISSDs each contain a definition of a type name T , the set of types derived by extension from T must be equivalent in both ISSDs.

更进一步地，如果两个参与ISSD每个都包含了一个类型名 T 的定义，对 T 扩展而得来的两个ISSD中的类型必须是等价的。

A new conception of power per unit impedance is defined and the basic equation to express the variation of load voltage magnitude with the variation of its dynamic equivalent impedance and that of power per unit impedance is derived.

定义了单位阻抗功率的新概念，推导了电压幅值随其等值阻抗和单位阻抗功率变化而变化的基本方程式。

Objective To establish a method of constructing a living dermis equivalent in vitro.

目的：探寻建立真皮类似物的培养方法。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。