弓形的

For gas flow past cylinder, the characters of flow field in different Mach number and Knudsen number condition were investigated, and especially for low Knudsen number cases, the results were compared with calculating results of Euler's equation. It showed that they are correspondent by comparing the characters of bow shock and wake. The convergence rates of different high resolution and implicit schemes were also investigated. The convergence behavior of the implicit WENO scheme developed in this paper is better than others. For gas flow past NACA 0012 airfoil, the calculating results were compared with results of experiment. It showed that the results of WENO scheme are of higher accuracy for the case with angle of attack.

在圆柱流场时，我们探讨不同马赫数且不同纽森数时的流场特性，并在低纽森数时，与那维尔-史托克方程式的计算结果比较，我们比较了弓形震波及尾流附近的特性，其结果是相当符合的，同时我们也比较不同高解析隐式算则的收敛历程，从收敛历程图可得到，本文发展出来的隐式WENO算则有较佳的收敛效果；在NACA 0012翼形的流场中，我们将与实验结果做比较，发现利用WENO算则计算的结果，对於具有攻角的流场，亦有相当高的准确度。

We have developed many kinds of optical methods to measure the insect flight. For example, a beating force measurement method reduces the uncertainty caused by air turbulence; a flow measurement using a frame straddling technique decreases the interval between exposures of the flow;extracting the weak distorted fringes on the dragonfly wing by a correlation algorithm; measuring the camber deformation of a dragonfly wing using projected comb fringe without hypothesizing that the wing is a rigid plate. By measuring the beating force, wing kinematics and flow, simutantously, we can analyze the relationship among many flight parameters.

本研究针对昆虫运动的特点，研究开发了测量昆虫运动，特别是自由飞行昆虫运动的光学方法，包括：风洞中扇翅力的测量，解决高灵敏度光学测量的抗干扰问题；帧头帧尾流场测量方法，解决由CCD拍摄帧频导致的测量速度低的问题；调制相关算法，解决透明翅膀上散射光较弱问题；梳状条纹投影法，解决翅膀弓形变形测量问题，不需要以往的翅膀刚性平板或刚性条杆假设；多参数的综合测量，解决各参数间的相位匹配问题。

Her many ge blades show greater variety and more distinct shapes than those known in Chinese contexts, while other weapons and tools daggers and knives with animal-head or jingled pommels, socketed pickaxes, bow-shaped fittings, and shield ornaments are clearly non- Chinese in origin.

其中出土的许多刀刃展现了比已知的中原类型更丰富的种类且相异的外型；与此同时出土的其他一些武器，工具-动物型刀柄或系铃的匕首和小刀，凹型的鹤嘴锄，弓形装配以及一些盾面装饰：这一些器物都明显是非中原的渊源。

Her many ge blades show greater variety and more distinct shapes than those known in Chinese contexts, while other weapons and tools – daggers and knives with animal-head or jingled pommels, socketed pickaxes, bow-shaped fittings, and shield ornaments – are clearly non- Chinese in origin.

其中出土许多刀刃展现了比已知的中原类型更丰富的种类且相异的外型；与此同时出土的其他一些武器，工具-动物型刀柄或系铃的匕首和小刀，凹型的鹤嘴锄，弓形装配以及一些盾面装饰：这一些器物都明显是非中原的渊源。

The exaggerated arching of the back produced by the way modern dogs are sometimes set up in the ring may lead less experienced observers to the opinion that the less curved, correctly positioned arch is too flat a topline.

这个过分的弓背会是那些没有经验的看狗赛的人在现在的赛场中觉得不怎么弓的，却正确的弓形会是太平的背线。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。