parabola造句

• On the basic of the detailed analysis on main causes and main prediction methods of casting shrinkage / porosity , we put forward two methods to describe the solid phase rate of materials solidification . one is liner - distributing method , and the other is parabola - distributing method . and then , we apply the former to the system
  本文在充分分析铸件缩孔缩松产生机理与主要预测方法的基础上，提出了材料凝固固相率的线性分布法和抛物线分布法，并将前者应用于系统中；同时提出了温度梯度法和新山判据法的实现算法，此算法具有一定的灵活性。
• Through the flume experimental research , the velocity distribution formulas for rectangular open channel have been found , including parabola form of velocity distribution on the vertical and power form of mean velocity distribution on the transverse direction ; meanwhile , the means of ascertaining correlative coefficient have been given in this paper
  摘要通过对明渠流速的水槽试验研究，建立了矩形断面明渠沿垂线流速的抛物线分布公式和横向平均流速的乘幂函数分布公式，同时给出了相关系数的确定方法。
• The distance from figure center of the parabola to the potential slide surface is less than half of the section length . mechanical conditions of this method include not only force equilibrium but also moment equilibrium . as for the beam - on - foundation , its pressure can be calculated by homogeneous hypothesis or winkler foundation hypothesis or infinite half elastic foundation hypothesis on the pulling anchor - cable step and by coulomb active earth pressure theory approximatively on the long term working step
  对于桩在滑面以上段所受的坡体荷载，提出可按形心偏下的抛物线型分布模式计算，并在满足力的平衡条件的同时还满足力矩平衡条件；对于地梁上作用的坡体荷载，提出在锚索张拉阶段可按均布或温克尔( winkler )地基假定或弹性半无限体地基假定来计算，在工作阶段则一般可以近似按库仑主动土压力理论计算。
• Aimmed to retard the response of ballistic missile defence system , the wavy trajectory with three crests is designed in this thesis to replace traditional parabola one . this kind of trajectory make anti - defence system have lots of difficulties to detect and compute the track and destination of ballistic missiles before reentry . so , applying the wavy trajectory can greatly improve the anti - defence ability of ballistic missiles
  从延缓导弹防御系统的早期预警时间着手，将传统弹道导弹的抛物线弹道中段设计成有多个波峰的跳跃式弹道，使得探测系统在导弹再入大气层之前，很难准确探测和计算导弹的落点，使得防御系统防不胜防，从而大大地提高了弹道导弹的突防能力。
• This paper describes the conjunction relationship of the basic point of the flat surface outline on the parts and reveals the internal law of the intersections connecting with the typical curve ; the principle of the calculation and the characteristics on straight line to parabola basic points are illustrated
  摘要介绍了平面轮廓零件各组成元素之间的连接关系，并揭示了典型曲线交接的内在规律，阐述了直线与抛物线交接点的计算原理和特点，总结归纳直线与抛物线连接的处理方法，以及自动淘汰无效基点的基本准则。
• The theoretical deduction in chapter 3 shows that the shape of load distribution used in the arithmetic is a decisive fact of the error margin size , the more the adoptive shape looks like the actual case , the smaller the error margin will be , therefore the tilt parabola shape can instead of the actual shape of load distribution in the permissible error margin when we predicting constant loading noise caused by the tail rotor of helicopter
  在第三章中通过理论推导和计算比较发现,在预测直升机尾桨定常载荷噪声时,其误差大小取决于算法中桨叶弦向载荷分布的数学描述与实际弦向载荷分布的吻合程度,而选取一种与实际弦向载荷分布较为相似的斜抛物线形来预测噪声所导致的误差是很小的。
• The starch accumulating quantity of all the tested cultivars showed irregular parabola types in difference soils ; the strong gluten cultivar did not reach a notable level in different soils , both middle gluten cultivar and weak gluten cultivar gave the largest in the loam soil based on the starch accumulating quantity
  不同土壤质地强筋品种淀粉积累呈不规则抛物线趋势，但差异不大；中筋品种在不同土壤质地上积累动态呈不规则抛物线，其中，在壤土上淀粉积累量最大；弱筋品种在不同土壤上淀粉积累均呈抛物线型，在壤土上淀粉积累量最大。
• Three shaped profiles ( parabola , linear , and exponential ) have been considered . the exponential dispersion profile fiber loop is optimal for the propagation and compression of picosecond pulse . on the contrary , the parabola dispersion profile fiber loop is optimal for femtosecond pulse due to the high order effects such as the third order dispersion ( tod ) , stimulated raman scattering ( srs ) and self steeping ( ss )
  ( 3 )研究不同色散递减类型(抛物线递减、线性递减、指数递减)光纤构成的环形腔中传输的特性，发现其色散曲线为指数递减型光纤有利于皮秒光脉冲的传输与压缩；而对于飞秒脉冲，由于三阶色散( tod ) 、脉冲拉曼自散射( srs )及自变陡( ss )等高阶非线性效应的影响，情况恰恰相反；色散曲线为抛物线递减型的光纤构成的光纤环最有利于脉冲传输与压缩。