查询词典 pectoral fin

This paper takes the small fish of Carangiform as the mimetic object. Through the bionics study to the principle of Carangiform"s propulsion, the robofish"s main body mechanism that has two degrees of freedom tail fin and single degree of freedom pectoral fin has designed. At the same time, the parameterized mathematical model of double-hinged propulsion system has established. The kinematics analysis, dynamics analysis to the propulsion process and preliminary hydrodynamics analysis to the tail fin and the pectoral fin have been completed. The dynamic equations to the propulsion system have been established.

本文以鲹科模式鱼类为仿生对象，通过对鲹科模式鱼类游动机理的仿生学研究，设计了两自由度的尾鳍推进机构及单自由度的胸鳍机构的机器鱼机械本体结构，建立了参数化的两关节尾鳍推进模式的数学模型，并对推进过程进行了运动学、动力学分析，建立了推进系统动力学方程，对尾鳍和胸鳍推进的水动力进行了初步分析。

The measurements used are fork length, head length, upper jaw length, snout length, length of dorsal fin base and anal fin base and the distances from the tip of snout to insertion of dorsal fin, to pectoral fin, to ventral fin and to hard margin of preopercle.

此所用於分析之外部非体节形质计有：尾叉长、头长、上颚长、吻长、眼径、背鳍基底长、臀鳍基底长以及吻端到前鳃盖骨后绿、背鳍起点、腹鳍起点、臀鳍起点等11个形质。

Moreover, as the heat flux approach to CHF, numerous vapor mushrooms periodically extruded from the perimeter of fin array are observed. This mechanism will cause the dry-out situation in the central part of fin array. The closer fin spacing and longer fin length can provide larger heat transfer. However, the results also demonstrate that early decay on overall heat transfer coefficient as the fin spacing is closer or fin length is longer.

此外，间距0.5mm且高度4mm的鳍片阵列，其热传系数并不随热通量的升高而增加，在中高热通量区，其热传系数保持在一固定值，而其它低深宽比的鳍片阵列，热传系数则是随著热通量升高而增加，到了高热通量区，热传系数会有一最大值，之后会随热通量增加而递减。

The deformation always appears near the points of the origin of pectoral fin or the origin of dorsal fin to the posterior margin of caudal fin, and is mostly accompanied by flaccidity of caudal fin end.

畸形弯曲位置主要发生在近胸鳍起点处以及背鳍起点至尾鳍末端之间，多伴有尾鳍末端下垂。

Dorsal fin, tail fin and fat fins slightly yellow, pectoral fin, and ventral fin Tunqi gray.

背鳍、脂鳍和尾鳍稍带浅黄色，胸鳍、腹鳍和臀鳍灰白色。

In the second part the pectoral fin motion model of 2 degrees and 3 degrees of freedom is constructed. Also we use Unsteady Vortex Lattice Method to analyze the hydrodynamic performance of the pectoral fin motion.

第二部分建立刚性胸鳍二自由度、三自由度的运动模型，并用非定常涡格法计算和分析了胸鳍的水动力性能。

His paper established the physics model for the newly developed under water bio-robot Robo-Mackerel moving about under the pattern of the swinging of its pectoral fin, and the motion equation of the swinging of mechanical pectoral fin was presented.

对新近研制的仿生水下机器人Robo-Mackerel，建立其在胸鳍摆动模式下游动的物理模型，并给出机械胸鳍摆动的运动方程。

Two-winged species have only the pectoral fin s enlarged; four-winged species have both the pectoral and the pelvic fin s enlarged.

有些种类具双翼而仅胸鳍较大，有些则有四翼，胸、腹鳍皆大。

Its flat tail fin to be divided into two forks, on both sides of the pectoral fin was like the palm of your hand flat, triangular dorsal fin.

它的尾鳍扁平地分为两叉，两边的胸鳍呈扁平的手掌状，背鳍呈三角形。

Long and thin mouth, back Light gray or blue, pure white for the ventral, dorsal fin-shaped as a triangle, two pectoral fin like the palm of your hand, flat tail fin in the middle fork, good at swimming, the maximum speed of 80 km around .

嘴部又长又细，背呈浅灰色或蓝色，腹面为纯白色，背鳍形如一个小三角，胸鳍宛如两只手掌，尾鳍扁平，中间分叉，善于游水，时速可达80千米左右。

Cable dampener cannot be rolled up but must be hung over the cable.

缆帆不能被卷起，必须保证处于展开状态

"This skylark is a present from my master," he says.

"这只云雀是我主人献上的礼物。"他说。