Concave reflecting surfaces of spherical cap , paraboloid and hyperboloid of revolution are investigated with regard to the dependence of the levitation force on the section radius rb and curvature radius r ( or depth d ) of the reflector 针对球面、旋转抛物面和旋转双曲面三种形状的凹面反射端，系统研究了悬浮力与反射端截面半径r _ b和曲率半径r (或深度d )之间的本征关系。
The directrixes of the in former two transmissions are the loxodrome and the geodesic on the pitch cones , that of the latter is an equal - pitch line along the direction of straight generatrixes in the hyperboloid surface , also is the vertical trajectory of the straight generatrixes 前两种传动形式的准线分别为节锥面上的斜航线与测地线，后者的准线为单叶双曲面上沿直母线方向的等螺距曲线，且为直母线族的正交轨线。
Extreme pressure ( ep ) additive ? chemical compound imparting extreme pressure characteristics to a lubricant with the objecfive of reducing wear under conditions where rubbing or sliding accompanies high contact pressures ， as in heavily loaded gears ， particulars of the hypoid type 极压( ep )添加剂在伴随着高接触压力的摩擦和滑动的情况下(如：在重载齿轮，特别是准双曲面型齿轮中) ，能够赋予润滑油抗极压性能，以达到减轻磨损目的的化合物。
Extreme pressure ( ep ) additive _ chemical compound imparting imparting extreme pressure characteristics to a lubricant with the objective of reducing wear under conditions where rubbing or sliding accompanies high contact pressures , as in heavily loaded gears , particulars of the hypoid type 极压（ ep ）添加剂在伴随着高接触压力的摩擦和滑动的情况下（如：在重载齿轮，特别是准双曲面型齿轮中） ，能够赋予润滑油抗极压性能，以达到减轻磨损目的的化合物。
And then we consider the manner in which the bennett linkage is related to the hyperboloid defined by its joint axes and the one defined by its links . we go on to algebraically inter - relate these and an equivalent screw of the overall instantaneous motion , which help us understand its kinetic property 然后进一步研究了它的四个轴线所组成的单叶双曲面和它本身的几何参数的关系，使bennett机构的瞬时运动和某个单叶双曲面结合起来，有利于我们对其运动属性的了解。
The paper research a predominant variable torque clutch ? hyperboloid clutch with rollers . the clutch makes convert mutually between force and torque reality to control transmission with special geometry relation and friction transmission . it is satisfy with the request of modern industry 本文所研究的是一种性能优越的可变扭矩加载器?双曲面滚柱加载器,利用加载器接触表面特殊几何关系,通过接触表面的摩擦传动,实现轴向力与转矩之间的相互转换,从而达到控制制动和传递动力的目的,可满足现代工业对加载装置的要求。
Establish geometry model of hyperboloid clutch with rollers with differential geometry . we know that the line of tangent is beeline and validate it with matlab . in the base of above research , establish movement model of hyperboloid clutch with rollers and find the relation between force of outer race and moment of inner race 在上述研究的基础上利用运动转化原理建立了内外环与滚柱之间的运动模型,并利用微分几何的相关知识通过对施加在外环上的主动轴向力的分解及合成,求的其在内环上所产生的力学反应,建立双曲面滚柱加载器力学模型。
In lifting - surface theory , the non - liner phenomena of the trailing vortex in the transition wake area and of the tip vortex separation are considered . in surface panel method hyperboloidal quadrilateral panels are employed and the morino ' s analytical formulation is used to determine the influence coefficients . the more reasonable pressure kutta condition is satisfied at the trailing edge of propeller blade 在计算中，对于升力面理论，本论文考虑了过渡区尾涡收缩和叶梢分离的非线型现象的影响；对于面元法，本论文采用的是计算较为简便的基于扰动速度势的基本公式及双曲面形状的面元，在桨叶随边满足更趋合理的压力kutta条件，并用morino导出的解析公式计算面元的影响系数的快速有效的数值预报方法。
In order to solve the problems of which the spiral bevel gear of oerlikon type is necessary to out and modify repeatedly , a new method was developed to predict the contact pattern and greatly reduce the cost for manufacturing by means of building a tooth contact analysis model of prolate epicycloids bevel and hypoid gears for oerlikon skm2 摘要为解决奥利康锥齿轮加工过程中需要反复试切、修正的问题，根据奥利康skm2机床建立了加工延伸外摆线齿锥齿轮和准双曲面齿轮的齿面接触分析模型，提出了一种可预测齿面接触质量、降低设计加工成本的新方法。
On the basis of analyzing the reason of bad aluminum foil crosscut effect , this text applies the geometry characteristic of the uniparted hyperboloid to the crosscut mechanism of moving aluminum foil , and confirmed the type line of rotating knife edge , thus a kind of rational method for movement aluminum foil crosscut had been drawn 在分析铝箔横切效果不佳原因的基础上,把单叶双曲面的几何特性应用于移动铝箔的横切机构之中,并确定了转刀刀刃的型线,从而得出一种移动铝箔横切的合理方法。
