查询词典 polar angle

Equatorial, or low, latitudes are hotter than the polar latitudes because of the angle at which the rays of sunlight arrive at the Earth's surface.

由於太阳光线到达地球表面的角度不同，赤道或较低纬度区比两极纬度区热。

Feature points ; geometric gravity center ; polar radius ; argument angle

特征点；重心；极径；幅角

Its 10 grooves are well described by Archimedes'(287 to 212 B.C.) spirals (5, 6) of the form r =*(in polar coordinates, radius r, angle , and constant ).

其10槽有很好的描述了阿基米德( 287至公元前212 ) spirals ( 5 ， 6 )的形式r =*(极坐标，半径r ，角度和常数)。

With a camera (640pixel×480pixel and 0.097 3mm/pixel as resolution of target),50 samples are taken at each distance of 1m,9m and 18m.The standard deviation is 0.009 37mm,0.034 2mm and 0.086 0mm for polar radius,0.843′,1.26′ and 1.57′ for angle,respectively.

采用640pixel×480pixel摄像机(光靶分辨率为0.0973mm/pixel)，在1m、9m和18m处分别摄取50幅图像，测量结果的极径标准偏差分别为0.00937mm、0.0342mm和0.0860mm，极角标准偏差分别为0.843′、1.26′和1.57′。

METHODS: The endodontic instrument was assumed as a metal conical bar. The normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics. The relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, and metal elastic modulus were analyzed. The criteria for yielding and fracture of the instrument were discussed.

将根管器械刃部假设截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

METHODS: The endodontic instrument was assumed as a metal conical bar, the normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics , the relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, metal elastic modulus were analyzed, the criteria for yielding and fracture of the instrument were discussed .

将根管器械刃部假设为截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

Polar perfluoropolyether lubricant film has been fabricated on single crystal silicon by dip coating technique. The contact angles of distilled water droplet on the single crystal surface and the lubricant film surface were measured with a contact angle meter and the chemical states of C of the film determined with an X ray photoelectron spectrometer.

利用浸涂技术在单晶硅基片上成功地制备出极性全氟聚醚润滑膜，在DF－PM型动－静摩控系数精密测定装置上考察了润滑膜的摩擦特性，并采用接触角测定仪和X射线光电子能谱仪对润滑膜的表面性质和化学状态进行了表征。

The main research as follow: gradually open line,in which a small segment adopted to draw straight line to matching;the key points,at which gradually open polar coordinate calculation is adopted;there are two kinds of situation should be considered in the outside wheel gear;in order to keep enough place for revolving angle,repla...

研究工作包括：渐开线采用小段直线的拟合；关键点采用渐开线公式的极坐标形式计算；外齿轮齿廓渐开线要考虑两种情况的生成；外齿轮上以作用力的方式代替转距以保证在节点处啮合外齿轮所要旋转的角度；用ANSYS软件仿真了几组不同的情况，并将仿真结果与理论计算结果进行比较，结果表明所用理论方法和所建模型的正确性。

In this paper, the basic mathematical model was derived by means of two methods, the first is the twostar positioning algorithm in celestial navigation theory and the second is based on the gyro dynamics theory. The results from these two methods are identical and therefore are correct. The latitude is equal to the elevation-angle of the polar gyro. The course is the ideal output from the sensor fitted to the outer gimbal. The longitude is a function of the equator gyro's azimuth and elevation angles.

本论文用天文导航中的双星定位法和经典的陀螺力学原理两种方法建立了ESGM的基本数学模型，并且得到一致的结果，说明所建模型是正确的，即载体的纬度等于极轴陀螺主轴相对水平面的高度角，载体的航向等于极轴陀螺外环轴上角度传感器的理想输出，载体的经度是赤道陀螺的方位角和高度角的函数。

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。。。。