查询词典 oscillation

Asymptotic behavior of mathematical ecological models is an important conception with rich connotation,which mainly includes attractability of the solutions,stability,periodicity and oscillation and so on.

数学生态模型解的渐近行为是一个具有丰富内涵的重要概念，其主要包括解的吸引性、稳定性、振动性与周期性等内容。

Firstly, The sufficient con-ditions of the existence and uniquity of the positive equlibria by applying functional derivative isobtained; Secondly, the global attractability of the positive equlibria is investigated by charateristicroots theory and oscillation theory; Thirdly, regarding the delay as a parameter, conditions of theexistence of Hopf bifurcation and the peridic solution, furthermore, the form of the approximateperidic solution are obtained; Finally, Some specific examples are given and the solution diagrameappears by Matlab.

首先利用导数性质，得到了该模型正平衡态存在惟一性的充分条件；其次，利用特征值和振动性理论得到了该模型正平衡态全局渐近稳定性充分条件；然后，应用Hopf分支理论证明了该模型Hopf分支及近似分支周期解的存在性，并给出了周期解的近似表达式；最后，借助于MATLAB数学软件，举例并绘出了模型数值解的拟合图象，验证了文中定理条件的可行性。

In audio, a very low frequency oscillation often resulting from a positive feedback path in an amplifier system .

在音响设备中出现的振荡频率极低的低频振荡，常因放大系统的正反馈回路引起。

This thesis is mainly focus on the fault forecast problem of compressor, that is, on the basis of the relationship of the gathering correlative parameters of compressor (such as compressive stress of exit or entrance、temperature、oscillation of axletree、the quantity of leaking gas and so on), concluding the possible reason of the fault, taking effective measures to avoid economic lost from shutting down of the fault of equipments.

本论文研究的主要内容是压缩机的故障预测问题，即根据采集到的压缩机的相关参数（如：出/入口压力、温度、轴承振动、泄漏气量等）之间的关联关系推断出可能的故障原因，采取有效措施，避免因设备故障停车造成的经济损失。

Oscillation occurs when bending moment is calculated with displacement, and the result is not reliable in certain condition.

使用位移计算弯矩会出现振荡现象，在一些情况下其结果是不可靠的。

It is shown that baryogenesis via leptogenesis occurs quite naturally, with a single phase (determined from neutrino oscillation data) appearing in leptonic asymmetry and in neutrinoless double beta decay.

而且能很自然地由轻子数破坏产生重子不对称的实验观测值。很有趣的是这类模型中出现在轻子不守恒和无中微子双beta衰变中的相位是一样的。

The betatron and synchrotron oscillation are measured frequently during the period of the machine commissioning, operation and machine study.

在加速器的运行、调来和机器研究过程中，需要经常对来流振荡频率进行测量。

A periodic oscillation analytic solution for the system at bifurcation point was obtained by using the method of series.

利用级数法求出了系统在分歧点处的时间周期振荡解的解析表达式。

If the required LO is beyond oscillation limits, or the system calls for an external LO, the external signal can be injected at Pin 6 through a DC blocking capacitor.

假如所需要的 LO 达到振荡极限，或者系统使用外部的 LO，外部信号可通过一个 DC 隔直电容注入脚 6。

It was found that with the increase in the oscillating frequency for a fixed oscillating angle, the film thickness increases, which may contribute to the formation of the oil film; however, the maximum pressure and the pressure scope during an oscillation cycle also increase; which may shorten the fatigue life of the bounding surface in the latter situation.

结果表明：在摆程不变的条件下，膜厚随摆动频率增加而增大，有利于润滑膜的建立，但同时会增加1个周期中的最大压力及压力波动幅度，使工件易于疲劳；对于相同凸度量，在低频摆动工况下边缘效应较高频工况下的严重，因此在低频摆动工况下使用滚子设计时需要增大其凸度量。

The receding calculations and experiment analyses in this subject are built on the blood cast of pig tongue.

本研究课题的前期工作是采用猪舌血管铸型模拟人舌而进行的数值计算与实验分析。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&