查询词典 anal fin

Caudal fin is rounded in both subspecies.

在这两个亚种舍入尾鳍。

Using engineering and numerical analysis software Matlab some simulations of the model are carried out, and the motion simulations of the fish body and the caudal fin under different kinematics parameters are also carried out.

根据对鲹科加新月形尾鳍推进模式的仿生学研究，在分析游动过程中身体与尾鳍运动的基础上，建立了一维稳态游动情况下鱼体及尾鳍的运动学模型，利用Matlab工程分析与计算软件对该模型进行了运动仿真，并进行了尾鳍和鱼体在不同运动参数下的仿真研究，给出了适合仿鱼水下推进器设计的参数取值范围。

This dissertation sets up a physical model consists of the caudal fin, the muscles and the spring, and also gives a mathematical model of the optimal compliance of the spring. Some simulations are carried out. The simulation results says that the elastic element can increase the propulsion efficiency, which provides a technical way for promoting efficiency of underwater propulsors.

本文给出了一种含有弹性元件的肌肉—弹性元件—尾鳍的物理模型，在游动能量损耗最低条件下，建立了求解弹性元件最佳柔顺系数的数学求解模型，并进行了仿真研究，研究结果验证了弹性元件对提高推进效率的作用，为提高仿鱼水下推进器的推进效率提供了一种技术上的解决途径。

Caudal fulcrum V-shaped, spine-like scale at front of caudal fin.

尾部棘状鳞在尾鳍的前面的V形棘状的鳞片。

Based on the bionic study on Thunniform propulsion mode and its body and caudal fin motion during one-freedom steady swimming condition, this dissertation sets up a kinematic model of this propulsion mode.

本文提出了一种仿鲹科加新月形尾鳍模式水下推进器的运动学模型。

Forked caudal fin deep, lower lobe longer, body silvery white, the upper was slightly blue gray.

尾鳍分叉颇深，下叶较长，体银白色，上部微呈青灰色。

The disease fish is restlessness、difficulty in breathing 、swimming around on the water or mad swimming,Caudal fin upper lobe exposes on the water surface and commonly known as "raising disease".

病鱼焦躁不安，呼吸困难，在水面打转或狂游，尾鳍上叶露出水面，俗称&翘尾巴病&。

The results indicated that FIN(Fujian,In- troduced Number)79-8 was an ideal carly matcurity varicty with high canc...

福引82-17被发现为中熟高产高糖的中细茎品种，具有对良好环境的特殊适应；福引82-41被认为是普遍适应的早熟高产高糖品种；这两个品种尚待进一步扩大表证示范，再行确定其推广价值。

Use cont rol theory of PID to carry out the cont rol of fin stabilizer , and simulate the slope angle of ocean wave and angle of roll by Matlab software.

用 PID 控制方法实现减摇鳍的控制，并用 Matlab软件对海浪的波倾角和船舶的横摇角进行仿真。

The adipose fin has always a red margin.

脂肪的鳍始终有一个红色的保证金。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。