Mathematical formulas are derived comprehensively and systematically for the profile coordinate, pressure angle and radius of curvature of the cylindrical cam with an oscillating roller follower. 推导了摆动滚子从动件圆柱凸轮廓线、压力角及廓线曲率半径方程,讨论了该种凸轮机构在各种运转情况下与之相适用的方程。
Theoretical calculation shows that the sun phase angle, observation distance and the brightness magnitude of the targeted satellite change significantly because of no earth curvature effect and large separation distance in position. 仿真计算表明,天基观测由于不受地球曲率影响,且观测几何拉开,太阳相位角、观测距离变化范围较大,因此目标卫星视星等变化范围较大。
In this paper the geometric characteristic of the curved surface under the condition of the spatial vertical angle coordinate system is directly described, i.e., the product of reciprocal of the two principal radius of the curved surface is Gauss curvature and it is an inner geometric quantity. 就曲面在空间直角坐标系下的几何特性作了一个直观的描述,即曲面的两个主曲率半径倒数之积为Gauss曲率并且它是一个内在几何量。
The experimental results show that the total pressure loss and outlet derivation angle can be retained in an acceptable range when the bend angle of van rear end is less than a specific value, reaching the aim of adjusting the outlet angle of variable curvature cascade. 研究结果表明:叶片弯角小于一定值时,叶栅的总压损失和出口气流落后角保持在可接受的范围,能达到调节气流出口方向的目的;
It influences not only the pressure angle of mechanism, but also the curvature of earn contoUrs. 它不仅影响机构的压力角,而且还影响其轮廓曲线的曲率半径。
Measurement of divergent angle width of laser beam with CCD for determination of radius of curvature of cylindrical lens CCD检测激光束折散宽度及在柱面镜曲率半径测量中的应用
In this paper, the pressure angle and minimal radius of curvature of cam mechanism with swinging roller follower are discussed in details. 本文对摆动从动杆盘状凸轮机构的最大压力角和最小曲率半径问题进行了详细的讨论。
The method establishes the corresponding relationships between two free-form surfaces with constraints of angle and distance by means of the surface features of the Gaussian curvature and the mean curvature. 该方法以曲面的曲率为联系特征,在测量数据与模型曲面之间建立起满足角度、距离约束的对应关系,利用三点旋转平移变换法生成旋转平移变换列表;
Water Flow Behaviors of Channel Bend in Middle Sized Radius and Big Bend Angle of Curvature 中等半径大偏转角弯道的水流特性
The method uses three parameters of seismic wave field attributes: the emerged angle α of zero-offset ray emerging to surface, wavefront curvature radiuses of Normal wave emerging to surface and Normal Incidence Point wave to describe relationship between reflector and travel time. 该法利用出射到地表的零炮检距射线的出射角α、出射到地表的Normal波和NormalIncidencePoint波的波前曲率半径三个地震波场属性参数描述反射界面与走时的关系。
From the angle of supervision the paper applies the modern quality management meaning and mainly introduces the supervision measure and method of pushing axis control by shield with small curvature radius. 该文从监理的角度,运用现代质量管理手段着重介绍了小曲率半径盾构推进轴线控制的监理措施和方法。
For the former one, the design philosophy of large sweepback angle of plow blade is introduced and for the latter one, the selection of earth entry angle and the parameters of the curvature of the plow arc discussed in this paper. 本文对前者提出了大后掠角犁翼设计思想,对后者则讨论了犁刀曲面各参数及入土角的选择。
In this paper, with the principle of high pair replaced by low pair, the cam mechanism is transformed to linkage, through the analysis of the linkage the equation of the pressure angle and the radius of curvature and profile of cam is established. 本文运用高副低代原理,将凸轮机构转化为低副机构,通过低副机构运动分析建立起凸轮廓线、曲率半径及压力角表达式。
Based on the mode coupling theory, this paper analyzes the critical angle of the TE 01-TM 11 mode converter completely by traditional waveguide axis constant curvature. 在模式耦合理论的基础上,采用传统的波导轴线圆弧弯曲的方法,对TE01&TM11模式变换器的临界角进行了全面的优化分析。
The angle can be calculated based on principle of optical triangulation and so the curvature of corresponding position based on structure parameters. 根据光学三角原理,可以求出该夹角的大小,然后结合检测器的结构参数可以计算出管道相应位置的曲率半径。
A novel method to extend the viewing angle of TN-LCD was proposed, as constructing the LCD cells with substrates which are of curvature rubbing pattern, we named this novel LCD cells as CR-TN. 本文提出了一种新的TN型液晶器件扩大视角的方法,即对玻璃基板上的取向层沿一特定的曲线摩擦,以这样的基板构造液晶屏。
Based on the mathematical model of involute gear at any rotary angle, the calculation mathematical model of any point on the root is put forward by fold section analytics, and the calculating formula's accuracy of curvature radius in this mathematical model is validated. 提出了基于任意转角位置的渐开线齿轮齿廓数学模型的齿根任一点局部应力的折截面法计算数学模型,并验证了该数学模型中曲率半径计算公式的准确性。
The article mainly discusses optical angular deviation affected by angle of incidence, curvature, refractive index and unparalleled faces in order to modify the windscreen processing. 本文主要讨论由上述因素引起的入射角、折射率、楔形度、厚度与曲率半径的比值对光学角偏差的影响,以利于生产工艺的控制。
Adaptive slicing is realized by the calculation of the position of tangent plane of modeling surface, the angle of between the normal section line and the slicing plane, the curvature of normal section line in z-axis direction and radius of curvature. 计算出造型曲面的切平面位置、法线与分层平面的夹角、Z向法截线的曲率和曲率半径,实现优化分层。
AIM: To evaluate the effect of angle, weight and way of cervical spine traction on cervical physiological curvature index based on that the change of cervical physiological curvature index is the major degenerative manifestation of cervical vertebral allomeric function. 目的:颈椎生理曲度的改变是颈椎整体功能的退行性变表现,探讨颈椎牵引的角度、质量、方式对颈椎生理曲度的影响。
Computation of S_1-stream sheet of axial air compressor with small installing angle by use of streamline curvature method 小安装角轴流压气机S1流面的流线曲率法解
Nozzle flow field of SRM was numerically simulated with Fluent software. The effects of nozzle convergent half angle, radius of curvature on upstream of throat section and length of throat cylinder on flow field are investigated. 用Fluent计算流体力学软件对固体火箭发动机喷管流场进行了数值计算,研究了喷管收敛半角、喷管喉部上游圆弧曲率半径和喉部圆柱段长度对喷管流场的影响。
The paper describes a high resolution, high accuracy and simple method of measuring dymamic angle by means of optical self-collimating of concave mirror curvature center. 用四球面反射镜曲率中心光学自准方法,通过测量自准像位移来计算弯沉角,是一种高分辨率、准确、简单地测量方法。
Combined with orthogonal test method and signal-to-noise ratio method, analyzed the sensitivity of each structural parameter to the performance of the cooling fan, which is installation angle, the blade chord length, radius of curvature of the blades and hub ratio from high to low. 并结合正交试验法和信噪比法分析了各结构参数对冷却风扇性能的敏感度,冷却风扇敏感度由大到小顺序依次为安装角、叶片弦长、曲率半径和轮毅比。
The rotation angle of lathe bed had been definite according to the curvature radius to meet the requirement. At the same time, drive the roller move by hydraulic cylinder and deliver motive power to roller through chain drive. 根据所要求的曲率半径,确定侧床身的旋转角度,同时采用液压缸驱动副滚轮移动,并且利用链传动传递动力至滚轮副。
The paper starts from the angle of further image detail reservation, considers and refers to the curvature information in four directions, chooses the direction that is closest to the original changing regulations to have quasi-bilinear interpolation filtering. 从进一步保留图像细节等高频信息的角度出发,考虑了图像四个方向的曲率信息,并以其为参考,选择最接近原始图像变化规律的方向进行类双线性插值滤波。
Focusing on the research of some important design parameters impacting the carrying capacity of the bearing, including radial clearance, contact angle and groove radius of curvature coefficient, a detailed analysis was given, and the corresponding bearing design recommendations were presented. 着重对影响轴承承载能力的重要设计参数径向游隙、接触角、沟曲率半径系数等进行了仿真,并给予了详细的分析,提出了对应的轴承设计建议。
The pressure angle and the actual contour curvature radius of the cam are the function of cam rotation angle. The calculation of pressure angle and contour curvature radius of the cam should be performed by deriving the equation of motion rule repeatedly. 凸轮的压力角和凸轮实际廓线曲率半径是凸轮转角的函数,且凸轮压力角和凸轮廓线曲率半径的计算需多次对运动规律方程求导。
The contact stress and deformation decrease with increasing of the contact angle. And the variation of helical angle has no noticeable influence on contact characteristic of ball screw mechanism. However, the contact characteristic is very sensitive to the variation of the curvature ratio. 随着接触角的增大,接触压力和变形减小,螺旋升角对接触特性无显著影响,接触特性对曲率比的变化非常敏感,随着曲率比的增大,接触压力和变形显著上升。