查询词典 dorsal fin

Individuals at sea are steel blue to blue-green on the back, silver on the sides, and white on the belly, with large oval spots present on the back, the adipose fin, and on both lobes of the caudal fin.

海上的个人是钢蓝色、蓝色的当前背面，脂肪的鳍和对这两种极限的尾的鳍背银的面上的绿色及上大椭圆形点的肚子白色。

STRUCTURE: Titanium and composites used extensively, with particular emphasis on corrosion resistance; fully articulated three-blade coaxial contrarotatmg rotors have all-composites blades with carbon fibre and glass fibre main spars, pockets (13 per blade) of Kevlar-type material, and filler similar to Nomex; blades have non-symmetrical aerofoil section; each has ground-adjustable tab; each lower blade carries adjustable vibration damper, comprising two dependent weights, on root section, with further vibration dampers in fuselage; tip light on each upper blade; blades fold manually outboard of all control mechanisms, to folded width within track of main landing gear; rotor hub is 50% titaniuin/50% steel; rotor brake standard; all-metal fuselage; composites tailcone; fixed incidence tailplane, elevators, fins and rudders have aluminium alloy structure, composites skins; fins toe inward approximately 25°; fixed leading-edge slat on each fin prevents airflow over fin stalling in crosswinds or at high yaw angles.

结构：钛和复合材料广泛使用，耐腐蚀性能与特别强调，充分阐明三叶片转子同轴contrarotatmg有碳纤维和玻璃纤维的主要棒材全复合材料桨叶，口袋（每刀片13）凯夫拉型材料，类似的Nomex纤维填料；叶片非对称机翼部分，每有地面可调选项卡，每降低叶片振动阻尼器进行调节，包括两部分依赖重根，在机身进一步减振装置；小费每个刀片上轻；刀片倍手动舷外所有控制机制，折叠宽度内的主起落架的轨道；转子中心为50％titaniuin/50％钢；转子制动标准；全金属机身，复合材料tailcone，固定发生机尾，电梯，蛙鞋和方向舵的铝合金结构，复合材料的皮肤；鳍鳍在每个脚趾向内约25 °；固定领先的板式翅片防止了侧风或气流停滞在高偏航角度。

The equation of heat transter on radiant type heat exchanger with fin s is established in the condition that thought of radiation heat transfer among fin s, base and out wall.

在考虑肋片与内外管壁的辐射换热情况下，建立了带肋片辐射换热器的传热方程，举例说明了计算方法，并与不考虑肋片与内外管壁的辐射换热的结果进行了比较。

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。

Body usually has black spots, caudal fin usually is unspotted, and adipose fin is not black bordered.

组织通常会有黑点、尾鳍通常是 unspotted，和脂肪翅不是黑色边。

The tail fin with two degrees of the robot-fish under the change of heavy load and the influence of characteristic of electromotor will make the distortion of transformation of speed and position synchronously, and bring on anisomerous flaping of the tail fin.

机器鱼多关节尾鳍受外界负载变化及伺服系统机械结构本身特性的影响会使速度和位置曲线失真，从而影响机器鱼的推进效率。

Then the lift and torque models of double wings fin stabilizers flapped lengthways and single wing fin stabilizers flapped breadthwise at zero speed are acquired on the basis of step by step degenerate derivation.

根据Weis-Fogh机构的组成和结构特点，论文提出了双翼纵向拍动型、单翼纵向拍动型和单翼横向拍动型三种类型的零航速减摇鳍。

The experimental result shows, Morpho butterfly's wing micro-structure forms the reflecting rate higher than the reflecting rate of other butterflies, so regard Morpho butterfly as and transfer to the micro-structure of printing, is observed by SEM and transfered to the vein micro-structure printed, demonstrate the same array scale as Morpho butterfly and carinate fin slice, small in more quantity than Morpho butterfly in the slight branch form structure, but metal micro-structure of color and luster printed off to transfer to raise reflect, it is it print off by AFM array carinate fin of alternate size nearly the width of 1.5μm to transfer to measure.

实验以高解析光学显微镜及紫外光/可见光光谱仪分析虎斑蝶、碧翠凤蝶、锯粉蝶、摩浮尔蝶蝶翼表面的光学反射、穿透与吸收特性，实验结果显示，转印的Morpho蝶翼微结构与真实摩浮尔蝶反射率较相近，故将Morpho蝶作为转印微结构，由SEM观察转印的翅脉微结构，呈现出与Morpho蝶相同的阵列鳞片与脊状的鳍片，虽细微的树枝状结构少，但转印出的微结构溅镀20nm的金属膜提高反射率，而由AFM检测转印出阵列脊状的鳍片间隔尺寸约为1.5μm的宽度。

Although the louvered fin geometry of heat exchanger had been proposed in 1950s, the flow and heat transfer characteristics of the louvered fin radiator weren't be analyzed and understood until 1970s.

虽然百叶窗翅片在50 年代就已经存在，但是仅仅在过去的二十年中，人们才开始通过各种手段去了解百叶窗翅片的流动现象和流动特性。

In order to study the geometry effect on the performance of the louvered fin heat exchanger, a two dimensional numerical model is established for air side heat transfer and fluid flow characteristics for a type of louvered fin surface and the related numerical simulation is conducted.

heat transfer and flow characteristics ； numerical simulation ；为研究百叶窗翅片几何结构对换热器性能的影响，采用二维计算模型，对空气流经一种类型的百叶窗翅片的传热和流动特性进行了数值模拟，获得了百叶窗翅片的温度场、速度场和流线图。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。