查询词典 parabolic curve

Split the lateral surface with a curve with the correct shape to create the hood side curve.

斯普利特的侧面曲线与用正确的形状创造引擎盖侧曲线。

After introducing the primary approximation approaches for curve and surface offset, we give an optimal approximation approach for offsetting curve based on shifting control points, which relies on approximating the normal by Legendre polynomial approximation.

在全面介绍了等距曲线曲面逼近的主要方法以后，作者首先利用Legendre多项式得到基曲线法矢曲线的最佳平方逼近，由此给出了基于控制顶点偏移的等距曲线最优逼近的算法，它在算法效果和效率上都远优于其他同类算法。

In specific applications expression : in compressed natural language describes various examples of the basic algorithm, using MATLAB as a programming language, a series of the combined limit, the bonus points will be combined, one graphics area and the length of the horizontal curve equations, and curve tangent process, the rotary body size and shape combined several process issues.

在具体应用中的体现：以简练的自然语言描述了各实例的基本算法，运用MATLAB作为编程语言，实现了数列极限的求解、定积分的求解、平面图形面积及平面曲线长度的求解、求曲线切线的过程、旋转体体积的求解及其形成过程等几个问题。

The curve length of the QRS complex is longer than that of other parts of the ECG in the same interval, so that the ECG curve length characteristic is suitable for QRS dctcction. Our algorithm not only detects the QRS complex position but also its duration.

该算法根据QRS复合波的曲线长度在一定的等时间间隔内大于ECG其他部分的特性进行QRS波的信息提取，其不但检测QRS波的位置，而且同时检测出QRS波的宽度。

The different width and length of Hilbert curve geometries were investigated by finite element method. The computation results show that the DGS rejects the signal at two frequencies 2.43 GHz and 7.11 GHz from 0~9 GHz with more than -15 dB suppression. Q factors of the Hilbert curve DGS is bigger than that of conventional DGS.

通过有限元法对不同Hilbert曲线宽度和长度的DGS结构微带线进行计算，计算结果表明，该结构在0~9 GHz频段内表现出2.43 GHz和7.11 GHz这2个谐振频率，对应频率的通带反射损耗低于-15 dB，并且阻带特性在谐振频率处比传统DGS微带线有更高的 Q 值。

With the increase of amylum quantity, the color of each the standard solution iodine combined with amylum changes dark and the its absorbance enlarges, the linear part in standard curve enlarges, while the amylum quantity are 20 ml and 50 ml respectively, the length of linear part in standard curve is not changed, so the optimum quantity of amylum is 20 ml.

对于碘标准系列溶液，随着显色剂淀粉用量的增加，溶液的颜色加深，吸光度在增大，标准曲线的线性部分加长，加入淀粉为20 ml和50 ml时，直线部分的长度变化不大，因此，加入20 ml最为理想。

In order to control the flow separation by reducing the diffusion factor and enlarging the diameter of inner circle, the meridian plane profile of the return channel was redesigned, which is achieved by substituting arbitrary curve for the circle with no change of the axial length of the stage. Bezier curve with eight parameters was chose to describe the shape of meridian plane profile, and the optimization of the meridian plane profile was implemented combining back-propagation neural network with genetic algorithm.

改进的主要思路是减小弯道前半部分通道的扩压度，并同时加大弯道出口内侧的转弯半径，主要做法是在不增加整级轴向尺寸的前提下，用任意曲线取代传统弯道的同心圆环结构，给定弯道回流器子午型线的外侧型线，采用Bezier曲线对内侧型线的2段曲线进行参数化描述，利用遗传算法和反向传播(back-propagation，BP)神经网络相结合的方法对内侧型线进行优化，得到新的弯道回流器子午型线。

Two new methods were developed for selecting a PB-S curve with some confidence percentile level as the planning curve.

提出了两种新方法用于选择一定置信度要求的PB-S曲线作为项目的基准计划曲线。

However, at some point factors such as lack of nutrients, accumulated wastes, etc., limit further increase, when the curve of number against time begins to level off and the curve becomes sigmoid.

然而一些关键性因素如营养物的缺乏、代谢产物的积累等，限制了进一步的增长。

In the chapter 3, the development and characteristic of TM image and DEM is explained generally. In following chapter, how to measure backwater curve using remote sensing and DEM is particular expounded, including revise the backwater curve using water level data which is measured by hydrology station.

在第三章中概括性的叙述了TM遥感影像与DEM的发展过程及特点，在随后的章节中详细的阐述了遥感影像结合DEM测定水库回水曲线以及利用水位站点实测数据进行校正等内容。

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。