查询词典 concave curve

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

According to mathematical model of neckband curve of turndown forming device,methods of calculating neckband curve with UG soft ware are introduced.

根据翻领成型器领口曲线的数学模型，介绍利用UG软件设计计算并绘制领口交接曲线的方法。

In the main-process, the coordinates of nodal points on part outline curve can be calculated by replacing this curve with a linear approximation. The codes expressed in NC program form which can be recognized by NC machine tool are got according to the coordinates of these nodal points in the post-process.

在前置处理中，用直线逼近零件轮廓，得到轮廓曲线的节点坐标：在后置处理中，根据这些节点坐标按照数控程序的格式得到数控机床可以辨认的程序代码。

This paper presents the basic concept of the production systematic analysis gas well and the basic principle and method in nodal point analysis of the gas well; Give the result of deep going analysis as well as research on the gas flow rule in the wellbore,performance relationships curve of inflow and outflow as well as the curve of pure gas well sand liquid production on gas wells.

本文重点论述了气井生产系统分析的基本概念、基本原理和方法，对天然气在井筒中的流动规律，气井流入与流出动态曲线，纯气井和产液气井的动态曲线，进行了较为深入的系统分析和研究。

This scheme is based on the elliptic curve of non singular elliptic curve over finite field, and with its security, it can be widely used in the fields as network communication, electronic commerce and IC card.

同时，该方案将自证明公钥体制推广到椭圆曲线域，同样长度的密钥具有更高的安全性。在网络通信、电子商务以及IC卡等领域具有广泛的应用前景。

The elliptic curve discrete logarithm of non singular elliptic curve over finite field has no efficient attack up to now, which made it cannot be widely applied in cryptography.

目前，在有限域上非奇异椭圆曲线离散对数问题还没有有效的攻击方法，使其在加密技术中得到了广泛应用。

Compact design Curve Controls did not achieve normal curve of the painting, although very simple but very good use.

体积小巧曲线控件没，实现一般曲线的各种画法，虽然很简单但很好用。

A normal curve is a density curve that is symmetric, single peaked and bell shaped.

一个常规曲线是一个对称的，单峰的，拱起的曲线。

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。