查询词典 harmonic

The paper presents a new method based on the wavelet-packet transform for the analysis of harmonic groups in power systems, compatible with the standards of the International Electrotechnical Commission.

本文提出了一种新方法的基础上，小波包变换为谐波分析组在电力系统中，符合标准的国际电工委员会。

Considering that tides are composed of various constituent, the paper here carries on the study on the changes of sediment concentration in estuarial region by means of harmonic analysis method of tides.

同时潮汐是由一个个分潮组成的，所以可以通过调和分析的手段对河口地区的含沙量的变化规律进行研究。

Methods 290 extracranial vertebral arteries of 145 healthy persons were examined with both tissue harmonic ultrasonography and conventional Doppler ultrasonography.

方法对145例健康自愿者的290条椎动脉分别进行组织谐波显像检查和基波显像检查。

ABSTRACT In this paper, some problems in harmonic free electron lasers and plasma wave wiggler FELs are investigated. The applications of FEL in material science are discussed in detail. As an example, KrF excimer laser was used to investigate the a-Si: H thin film solar cells instead of the free electron laser.

本论文对适用于应用的谐波自由电子激光和等离子体波泵Wiggler型自由电子激光中的若干问题进行了研究，对自由电子激光在材料科学领域的应用及应用前景进行了详细讨论，并使用KrF准分子激光器代替自由电子激光进行了模拟自由电子激光对α-Si〓H太阳能电池的改性实验。

Asar esult of the development of the photon-cathode microwave electron gun and thep rogress of linear accelerator technologies, of linear accelerator driven coherent harmonic generation FELs have been proposed.

由于光阴极微波电子枪的发展和直线加速器技术的进步，目前，已开始有直线加速器驱动的高增益相干谐波自由电子激光的建议。

Fibrillar collagen(Collagen typeⅠand Ⅲ) in sinusoids of normal liver was successfully observed through second harmonic generation microscopy.

分别用前向二次谐波及背向双光子荧光对肝脏标本的成纤维胶原和肝细胞浆进行成像，将结果与传统的Masson's三染色法进行比较。

Being of the open-loop control technique,the PWCT is fittable forsuppressing chaos in the ODS with wide period windows when supportedwith the quick algorithm of scanning and localizing the periodwindows,which has been developed for the easy application of thePWCT.The result of the computer simulation of controlling theopticalsecond-harmonic system with the PWCT is presented in the text forattestation.

周期窗口控制技术为开环控制技术，具有快速、简便、易行的特点，它主要适用于在周期窗口较宽的情形下对光动力学系统进行快速混沌压制控制，为便于其应用文中同时开发了相应的周期窗口快速搜索及定位技术，并给出了利用二者控制光学二次谐波系统的计算机仿真结果。

According to this model, approximate harmonic map is easily and fleetly solved by using computer linear circuit analysis.

利用此模型，可由计算机分析线性电路的长处，既方便又快速地求出调和映射的近似逼近。

The purpose of this thesis is to explore other yet undiscovered contrast origins and unused contrast agents of third-harmonic-generation inside biological tissues, and apply to the preliminary studies of medicine based on a nonlinear laser scanning microscopy system using a femtosecond Cr:forsterite laser centered at 1230-nm.

这篇论文的目的是利用了以中心波长为1230nm的铬贵橄榄石雷射做为光源的非线性雷射扫瞄显微镜系统去探索生物体中其他仍未被发现的三倍频对比来源以及尚未被使用的三倍频外加显影剂，并初步的应用於医学研究上。

In this thesis, the crystal structure and phase transition behaviors of a andβforsterite (Mg2SiO4) at high temperature and high pressure were investigated by the first principle calculations and the quasi-harmonic Debye model. Variations of elastic properties, band structure, density of state, band gap ofαandβforsterite with pressure were calculated, and the effect ofα/βphase transition on these characters was analyzed. The effects of water on elastic modulus, sound velocity and band gap of forsterite were also simulated. Finally, the effect ofα/βphase transition and water on seismic discontinuity in earth was discussed.

通过第一性原理结合准简谐德拜模型研究了α和β镁橄榄石的高温高压结构及相变特征；计算了α和β镁橄榄石的弹性模量、波速、电子带结构、带隙等随压力的变化规律，并探讨了相变对这些性质的影响；研究了水对α镁橄榄石弹性模量、波速和带隙的影响；探讨了水对地幔中不连续层的作用以及矿物相变对过渡带波速不连续的作用。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失