查询词典 constructive dilemma

The phase-shifts caused by reflection and transmission of the beam splitter were investigated by its eigen-martix.The general relationship between these phase-shifts of two splitted beams used for coherent combining was obtained,then the fact that when constructive interference occurs in one side of the beam splitter and the destructive interference has to occur in the other side was explained in the point of phase-shift.

利用分束器的特征矩阵研究了分束时产生的反射与透射相移，得到了两束相干光经过分束器分束后进行相干叠加时相移满足的普适关系，从相移的角度解释了分束器一侧发生相长干涉时另一侧必然发生相消干涉这一现象。

The relationship of the 7th cranial nerve and adjacent vessels was best visualized on the 3D TOF sequence and constructive interference in steady state sequence. The results were compared with the outcome of operation blinded.

HFS患者52例和健康成人20例进行MRTA检查，观察3D-TOF成像序列结合3D-CISS序列中脑桥小脑角池内面神经与周围血管的关系，并与手术结果进行盲法对照。

Recent investigations on quantum interference effects were introduced, including line-shape variation, spontaneous emission enhancement or cancellation, constructive interference and electromagnetically induced transparency in molecular and atomic-molecular mixed systems in our laboratory.

概述了近年来我们实验室将原子中量子干涉推向分子及分子-原子混合体系中量子干涉效应的研究，内中涉及基于量子干涉的分子跃迁线型畸变、发辐射的相消和相长、子干涉的影响因素、子一原子混合系统中的量子干涉相消和相长、磁自感应透明等。

Instead, if the illuminated specimen is specular, or mirror-like, the coherent addition of the collected beams generates a pattern of fringes by constructive and destructive interference.

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The first disadvantage of MMI device is wavelength sensitive, which leads to restricted applications. To reduce the wavelength insensitivity in optical network applications, the demand of light source with a specific wavelength is needed, especially for power splitters. For this reason, a wideband criterion for MMI splitter is proposed. The basic principle is based on reducing the interference length difference and making it shorter than the spot size for constructive mode interference. Simulation results show the spectra of proposed MMI splitter is wide enough (1.26-1.61um) to cover the fiber communication band and the size of the splitter is more compact than that of the conventional MMI or Y-branch splitter.

多模干涉元件的第一个缺点为波长敏感，此缺点会限制其在实际上的用途；因元件在网路上的应用时，通常都需要降低波长敏感性，以减低对光源波长准确性的要求；有鉴於此，本论文提出多模干涉分光器的宽频标准；基本原理是建立在缩短其多模干涉区的长度差，并使之小於建设性干涉的光点大小；透过模拟后发现，操作频宽可涵盖光纤通信全波段(1.26-1.61um)，且长度小於Y形分支结构的分光器。

The extracted P-wave is reverse-time extrapolated and imaged with a P-velocity model using a finite difference solution of the scalar wave equation, the extracted S-wave is reverse-time extrapolated and imaged similarly, but with an S-velocity model, and converted S-wave data requires a polarity correction prior to migration to ensure constructive interference between data from adjacent source.

在模型中，每个网格点的纵、横波成像时间，为震源到该网格点的纵波初至时间。利用纵波速度模型和声波传播方程的有限差分解，对反射纵波进行逆时延拓和成像，利用横波速度模型和声波传播方程的有限差分解，对转换横波进行逆时延拓和成像，并在偏移前进行极性校正。

However,this"GROWTH Model"is not based on a static process,but a process that allows constructive mathematics to take its course.

然而，这种"增长模式"不是建立在一个静态的过程，而是一个过程，允许有建设性的数学，任其发展。

In this paper, we are discussing the concept of intuitionism, and their logic ,and their constructive mathematics.

本文主要讨论直觉主义派的数学观、无穷观、逻辑规则和构造性数学，同时还概述了人们对直觉主义派的一般评论。

Peter Borwein is Professor of Mathematics at Simon Fraser University and the Associate Director of the Centre for Experimental and Constructive Mathematics.

彼得Borwein在西蒙·弗雷泽大学和实验和有建设性数学的中心的副主管是数学的教授。

The role of the teacher in teaching process should be freshened. Teacher is no longer a simple teaching machine, but an inspirer, organizer, participatant and guide in the constructive activities of mathematics.

要重新认识教师在教学过程中的主导作用，教师不再是简单的知识传授者，而应是数学建构活动的激励者、组织者、参与者和导向者。

Analog output can display output results.

可以模拟输出显示输出效果。

It implied that RAPD technique pro vided a new alternative for checking irradiation induced effects.

对扩增产物进行数据分析，结果表明RAPD技术能够检测出辐射后唐菖蒲基因组变异情况，可用于对唐菖蒲辐射后基因变异的分析。