查询词典 undulatory

Particularly, the swimming velocity and thrust generated by undulatory motion of the developed robotic fin are analyzed theoretically. Furthermore, a computational fluid dynamics method is used to show pressure distribution on robotic fin surface as well as the periodical change of generated swimming thrust with time.

重点推导了仿生鱼鳍波状运动时理论上能到达的推进速度和产生的推进力；并采用数值仿真给出了波动推进时仿生鱼鳍表面的压力分布以及推进力随时间的周期变化规律。

The results are the information transmission capacity of communications essentially lies on information carrier and information transmission mode,and on nowadays communication modes the information carries only by use of the space degree of freedom of signals and the information transmits only by use of the undulatory property of signals.

研究结果表明，通信系统的信息传输能力由信号承载和传输信息的方式决定；现有电子通信系统中信号处于低速宏观态，仅利用空间自由度承载信息和波动性传输信息，香农公式定量描述了该状态中信号的信息输运能力；高速态、微观态或介观态信号的信息输运能力有可能突破香农公式限制。

A computer simulation of the flight performance of Microraptor suggests that its biplane wings were adapted for undulatory "phugoid" gliding between trees, where the horizontal feathered tail offered additional lift and stability and controlled pitch.

计算机模拟的飞行性能microraptor表明，其双平面的翅膀被改编为波动" phugoid "滑翔之间的树木，如横向有羽毛的尾部提供了更多的升降机及稳定和控制音高。

We shall conclude that autocorrelation fluctuate from period to period, and amplitude of correlation variation is decreasing and tending to zero. This implicate that the markt is coming more efficiency with the lapse of time, and the market efficiency is undulatory authentically.

检验结果发现，序列相关系数呈现波动性特征，但波动幅度随着时间的推移越来越小，向零收敛，这一方面证明市场效率的波动性，另一方面说明市场的渐近有效性。

A computer simulation of the flight performance of Microraptor suggested that its biplane wings were adapted for undulatory "phugoid" gliding between trees, where the horizontal feathered tail offered additional lift and stability and controlled pitch.

计算机模拟的飞行性能microraptor建议，其双平面的翅膀被改编为波动" phugoid "滑翔之间的树木，如横向有羽毛的尾部提供了更多的升降机及稳定和控制音高。

The cycle undulatory theory tell us that there is certain periodicity in economical development. This kind of periodic performance almost simultaneously expands for the many economic activity, then universal declines, contracts and recovers, thus influend economy development.

周期波动理论认为经济发展存在周期性，这种周期性表现为很多经济活动差不多同时扩张、继之以普遍的衰退、收缩与复苏，从而影响经济的发展；而景气理论则是在周期波动理论的基础上，构建景气指数来监测宏观经济受经济周期波动的影响。

With the test model of underwater vehicle based on undulatory propulsion of long flexible fin as background, the paper mainly studied how to construct the test system which can satisfy the static and dynamic hydrodynamic force and moment measurement requirements of diversified test models of underwater vehicle fixed at arbitrary attitude.

以基于仿生柔性长鳍波动推进的水下机器人试验模型为背景，主要研究如何构建满足多种水下机器人试验模型在各种姿态下流体动力／力矩的静态与动态测量要求的测试系统。

On the other hand, with the purpose of fuzzy feature extraction and fuzzy classification device design, the undulatory property of maximum and minimum scattering power corresponding respectively to the maximum and minimum eigen-polarization has been investigated in frequency domain. Furthermore, the anisotropy polarization degree of target, which is determined by both maximum and minimum scattering power of target, has been studied; meanwhile, the dynamic changing characteristic of eigen-polarization on Poincare polarization sphere has been investigated by means of the conception of polarization frequency stability, the research result shows that PSD value has a big jump near π, forming a sharp pulse, and different target has their individual distribution property of PSD pulse.

另外，围绕目标模糊特征提取及模糊分类器的设计，研究了目标最大、最小本征极化所对应的目标最大、最小散射能量随观测频率的起伏特性，考察了由目标最大、最小散射能量共同决定的目标的各向异性极化程度；同时，采用极化频率稳定度的概念，研究了本征极化在Poincare极化球面上的动态变化特性，在最大、最小散射能量相等的频率点上，PSD曲线呈现为幅度接近π值的尖锐脉冲，反映了目标极化散射结构对这一频率跳变极为敏感，但不同目标的这种PSD曲线特征又有很大的不同。

Thirdly, they migrate to a certain direction. Asthenosphere movement leads to the movement of depression-uplift structure. Crustal surface shows undulatory movement due to the asthenosphere. Deformation and movement law of depression-uplift structure accordingly develops.

坳陷构造运动的动力是软流圈运动的结果，软流圈作波动运动使地壳表层也作波动运动，并形成相应的坳隆构造变形和运动规律。

Of the shark-kind some have no fins, such as those that are flat and long-tailed, as the ray and the sting-ray, but these fishes swim actually by the undulatory motion of their flat bodies; the fishing frog, however, has fins, and so likewise have all such fishes as have not their flat surfaces thinned off to a sharp edge.

一些鲨鱼类动物没有鳍，就像貂鱼和黄貂鱼一样，但是这些鱼实际上是靠扁平身体的波动来移动；然而鱼蛙有脚，就像所有没有平滑身体削薄到尖锐边缘的鱼类一样。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐