查询词典 destructive interference

The interferential effect among antennas is the researching key point. It causes not only signal process at baseband difficult but also destructive interference to radiation pattern. The interferential effect is discussed in the measured results.

天线间信号干扰的效应就是研究的重点，除了造成基频信号处理的困难外，也会造成天线间的破坏性干涉使得增益降低，量测的结果会说明信号干扰效应造成的问题，量测结果和心得会讨论。

In some materials with periodic variation of dielectric constants and light within a certain frequency range shows exponential decay due to destructive interference and cannot propagate. This phenomenon is called photonic bandgap and this kind of structures is called photonic crystals.

介电系数周期性排列的材料，部分波段会因破坏性干涉呈指数衰减，导致无法在此结构上传播，此现象称为光子能隙，此类具有介电系数周期性排列的结构则称为光子晶体。

Between 1/4 and 1/2-wavelength spacing the pattern narrows, but side lobes (interferencepatterns, caused by destructive interference) do not appear until the spacing is greater than 1/2 wavelength.

在1/4波长和1/2波长之间是不会出现旁瓣（副极大值，干涉波形，通常是由破坏性的干涉导致）的，这一现象会持续直到间距大於1/2波长。

Most DDL operations, except for those listed in the section " Share DDL Locks ", require exclusive DDL locks for a resource to prevent destructive interference with other DDL operations that might modify or reference the same schema object.

除了在"共享 DDL 锁"一节列出的操作外，大部分 DDL 操作都需要获得相关资源上的排他 DDL 锁，从而防止其他可能修改或引用相同方案对象的 DDL 操作带来的破坏性的冲突。

The shaped pulses were shown to be phase-sensitive atintensities too low to access different higher electronic states,and so these pulses apparently steer the isomerization throughconstructive and destructive interference effects, a mechanismsupported by observed signatures of vibrational coherence.

变过形的脉冲在低强度下显得很敏感，这种强度很小，因此很难进入更高的电子状态。于是，很明显地，这些脉冲能给通过破坏性和建设性的干扰效应来操控异构化作用。观测到的振动一致信号更支持了这样一种机制。

Simulation results show that the method can eliminate paroxysmal multiple access interference efficiently and has excellent capability of anti-multiple access interference and high reliability.

仿真实验表明，提出的方法能够有效抑制阵发性多用户干扰，具有很强的抗多址(multiple access interference，MAI)干扰能力和较高的数值鲁棒性。

This paper researches the principal and normal structure of adaptive interference chancellor, discussing the LMS adaptive filter algorithm and it's anamorphosis algorithm that is used in adaptive interference chancellor.

本文研究了自适应干扰对消的原理和一般结构，讨论了用于自适应干扰对消的LMS自适应滤波算法及其变形算法。

Firstly, it discusses the principle of adaptive interference chancellor, including broad band signal and narrow band signal; Secondly, it analysises one common algorithm used in adaptive interference chancellor, that is, LMS algorithm and its anamorphosis algorithm especially normalized LMS algorithm pointing out their relationship. After then, the paper talks about the structure and reality of canceling broad band noise in narrow band signal and narrow band noise in broad band signal and gives it's result simulation analyzing the factors affecting the power of the algorithm. In the last party, it gives the hardware design and assembly language software design using TMS32OC3 1, including the result of simulating.

首先，本文讨论了自适应干扰对消的原理，并对窄带信号和宽带信号两种进行了分别分析；然后本文对自适应干扰对消中常用的算法—LMS算法进行了分析，同时也讨论了LMS算法的变形算法，尤其是归一化LMS算法，并指出了这些算法的相同和不同之处；此后，本文讨论了窄带信号中的宽带干扰对消和宽带信号中的窄带干扰对消的结构及实现方法并给出了住址的结果，分析了影响干扰对消效果的因素；在论文的最后，给出了用TMS320C31实现窄带信号中的宽带干扰对消的硬件设计和汇编程序设计，以及汇编语言程序的结果，并就此结果与高级语言程序的结果作了比较。

But this kind of open emission and reception system in High frequency communication has to face two challenges: firstly, natural interference from atmospherics and industry; secondly, tracing, blocking and multipath interference from enemy.

但这种开放式的发射和接收电磁波的通信，特别是在短波通信领域，不仅易遭到天电、工业等自然干扰，而且还要遇到敌方人为的跟踪、阻塞干扰以及多径等各种干扰。

The beat frequency can be thought of as an interference pattern in time, as opposed to the spatial interference pattern that is obtained with a passive Sagnac interferometer.

节拍频率可以被认为是干涉模式的时间，而不是干涉的空间格局是获得了一个被动Sagnac干涉仪。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。