查询词典 flexible fin

A new bionics propulsion equipment—fishlike flexible tail fin propulsion equipment is brought forward,because there are some problems in present thrusters,such as big noise,low propulsion efficiency in shallow water and evident wake.

本文针对现有船用螺旋桨、泵喷等常规推进器存在噪音大、浅水中船舶推进效率不高以及尾迹明显等缺点，提出一种新型仿生推进装置—仿鱼尾柔性尾鳍推进装置，并据此展开了对单翼板柔性尾鳍和双翼板柔性尾鳍模型的计算和实验研究，本文工作属于鱼类生物流体力学、机械学、材料学和控制技术等多学科交叉的一个新兴研究领域。

Focusing on solving the problem of swaying propulsion, a design of bionic robofish with swaying flexible tail fin is presented.

提出了一种摆动式柔性尾部的仿生机器鱼设计方案，着重解决了机器鱼摆动式推进的问题。

Gymnarchus niloticus ; the long-based flexible dorsal fin ; undulation contour ; polynomial-fitting function ; MPF ; aquatic bio-propulsion

尼罗河魔鬼；柔性长背鳍；波动包络线；多项式拟合方程；奇鳍/对鳍推进；水下仿生推进

The geometric features of the body and locomotive characteristic and parameters of the flexible dorsal fin are discussed.

以依靠长背鳍推进的&尼罗河魔鬼&为研究对象，对弓鳍目模式推进进行了研究。

Fire-resistance; Finite element analysis; Flexible end plate connections ; Fin plate shear connections; Catenary action

抗火； 有限元分析；内缩式端板连接；柔性剪力板连接；悬链线作用

Numerical simulation of flexible end-plates connections and fin plate shear connections under fire was successfully done using FEM software ANSYS. Geometric, material and contact non-linearity was taken into account.

利用有限元分析软件ANSYS对高温下内缩式端板连接和柔性剪力板连接进行了数值模拟分析，分析中考虑了材料非线性、几何非线性及接触非线性等多种非线性因素的影响。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。