查询词典 parabolic curve

To analyze these two important factors at the same time,this paper uses the Lognormal distribution curve as the income distribution curve to establish a vehicle ownership forecast model.

急速增长的中国汽车保有量不仅和收入水平的上升有关，也和收入差距的扩大有关，为了同时考虑这两个影响汽车普及的重要因素，本文以对数正态分布曲线作为收入分布曲线构建了中国汽车保有量的预测模型。

A kind of method adopting polynomial approaches to match the nonlinear curve of looper tension moment is put forward on the base of analyses of the curve characteristic and project practice.

通过对带钢张力矩计算理论公式的分析并结合工程实际，提出了一种采用多项式逼近来拟合活套张力矩非线性曲线的方法。

This paper introduces a method of adding a new popup menu item to the menu groups of AutoCAD, creating user interface, establishing macro code,designing and drawing the contour curve of plate cam at the designated point in AutoCAD based on AutoCAD VBA,providing a living example for designing and drawing the complex planar curve in AutoCAD.

利用AutoCADVBA向AutoCAD菜单栏添加新菜单项，创建图形用户界面，编制宏代码，并在AutoCAD中设计和定点绘制凸轮轮廓曲线，为在AutoCAD中设计和绘制复杂平面曲线提供了具体实例。

Time sequence of the 25 m core was established based on ~14C dating, comparison of magnetic susceptibility curve and pollen record with SPECMAP curve.

根据~(14)C测年、磁化率曲线及孢粉图谱与SPECMAP曲线相对比，推算并建立了苏北盆地兴化钻孔剖面沉积物顶部25m的沉积地层年代序列：末次间冰期深度范围是25～17m，末次冰期范围是17～5.8m，全新世对应范围是5.8～0m；这一划分结果与已有的研究结果具有良好的对比性。

One point method, mean square curve method and the maximum likelihood principle to predict P-S-N curve for welded steel structures for arbitary survival rate are presented.

本文建立了任意存活率下焊接钢结构P-S-N曲线预测的一点法，均方差曲线法极大似然法。

Firstly,the paper gives a review of related literature and the of yield curve. Then the paper puts forward the method to build yield curve for RMB based on the McCulloch model.And finally the paper tests th...

本文首先对相关文献和收益率曲线的应用进行了评述，在此基础上，提出了基于M cCu lloch模型的人民币收益率曲线构建的具体方法，并采用实际数据进行了检验。

Based on the vehicle ride comfort performances, analyzes the relationship between suspension system and vehicle ride comfort performances. Carrying on dynamics simulation to the different entire vehicle model under the different operating mode, analyzes each axial acceleration change curve in the post-processing module, the use curve processing function, the computation always weighting acceleration mean square value, analysis the influence of suspension system to ride comfort performances, and obtains the suspension system optimization plan.

基于整车行驶平顺性，从理论上分析悬架系统与整车平顺性的关系，然后对不同整车模型在不同的工况下进行动力学仿真，在后处理模块中分析各轴向的加速度变化曲线，利用曲线处理功能，计算总的加权加速度均方值，分析悬架系统对平顺性的影响，并在此基础上得出悬架系统选型的优化方案。

According to the measure of stator curve, the controlling system was developed by VC++ under windows operating system.The complicated transition curve was measured by revolving contact three-coordinate measuring machine. It adopted the method of undetermined coefficients and optimization.

针对叶片泵定子这种复杂曲线类零件的测量，介绍了一种由VC ++开发的计算机测量控制系统，采用旋转接触式三座标测量仪通过计算机控制对定子曲线进行测定。

Mouse drawing,parallel translation,rotate,mirror,formula curve,list curve,gear program-package.

鼠标绘图，图标提示，可直接使用块平移、旋转、对称，公式曲线、列表曲线和齿轮软件

For the application of Mathematica in the differential geometry,this paper introduces how to processe the curve curvature and the torsion questions,the graphic expression of the curvature and the torsions,and draw curves by the curvature and the torsions. Curvature ; torsion ; solution curve ; osculating plane ; natural parameter ; natural equation

利用Mathematica，只要输入有关系统命令就可以得到期望的结果。1曲率和挠率及其图形意义假设R3上的曲线一般参数表示为r=r它的曲率和挠率计算公式是：κ=‖r′×r"‖‖r′‖3τ=‖r′×r‖我们知道，空间曲线r=r在一点(s=s0)邻近的近似方程为ξ=sη=120κs2ζ=160κ0τs3通过近似方程可以确定曲线在其基本三棱形的三个平面(即密切平面，法平面，从切平面)上的投

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。