查询词典 method of characteristic curves

Our difficulties are overcome in this paper by using the method of generalized normal sectors, provided by [Nonlinearity 17(2004): 1407-1426], which allows curves and orbits to be part of its boundary, may not be an angular neighborhood of the characteristic direction.

通过利用文献[Nonlinearity 17(2004)，1407-1426]中提出的广义正常区域方法，我们的困难得以克服，其中允许曲线或者系统轨道为广义正常区域的边界，而且该区域也不一定是要研究的特殊方向的角形邻域。

In this paper,the B-spline curve is supposed as boundary curves,when they are in two paralled plane and two arbitrary plane,the condition about the control vertex of characteristic polygon when the ruled surface is developable are gained,solved the designing problem of degree and degree B-spline curve .Throughing (2,3) degree and (2,2) degree B-spline ,we haveproved the validity and utility of this method.

本文用两条B样条曲线作边界曲线，当它们位于两平行平面上和两任意平面上时，研究得到了由它们形成的直纹面为可展面时它们的特征多边形顶点满足的条件，解决了(n，n+1)次和次可展B样条曲面的设计问题，然后以(2，3)次和(2，2)次B样条曲面为构造实例，证明了该算法的正确性和实用性。

An optical system with refraction and total internal reflection was proposed according to the luminous characteristic of LED and the law of energy conservation. The ordinary differential equations satisfying the spots on the contour curve of TIR refractive and reflective planes were established. The coordinates of points on profile curves were obtained by solving these ordinary differential equations using Runge-Kutta method. The profile curves were acquired by curve fitting of the coordinate spots with software UG, and then TIR model of the projector and data of the surface shape suitable for NC manufacture were obtained.

根据LED的发光特性以及能量守恒定律选择采用折射全反射光学系统，通过建立TIR折射面及全反射面轮廓曲线上的点所满足的常微分方程，利用RungeKutta求解常微分方程得到轮廓曲线上点的坐标，再在UG中对坐标点进行曲线拟合得到轮廓曲线，进而得到TIR模型及适合数控加工的面形数据。

The traffic momentum differential equation and Euler's equation for the ramp junction is founded by means of differential calculus in this paper,the traffic momentum differential coupled equation is solved by characteristic curve method,two groups of characteristic curves and corresponding related equation in high speedstates and low speedstates are presented.

采用特征线法对运动微分方程组进行分析求解，在高速低密度区和低速高密度区分别得到了两组特征线和对应的特征关系式。

Furthermore,the method to calculate the water characteristic curves in aerated zone are verified by in-situ data,and the modeling for imbibition and drainage test in 4 kinds of soil with different characteristics is performed.

用现场试验资料检验了求包气带土壤水分特征参数方法的有效性，同时对4种土质的脱湿与吸湿试验进行了模拟计算。

Use the method of summary receiver operation characteristic curves to evaluate the accuracy.

由于诊断试验的性能不仅由灵敏度决定，也由特异度决定，本研究采用诊断试验Meta分析特有的SROC分析的方法将灵敏度与(1—特异度)间进行线性的变换，定性和定量地比较~(18)FDG-PET和CT、MRI诊断的准确性。

In digital process method of the I-V characteristic curves of the probe, we carry out the smooth treatment of the curves and obtain the second derivatives of the curves, using the ready-made software ORIGIN5.O. This is a simple and effective method.

在对探针特性曲线的数值处理方法上，采用了现成软件Origin5.0先对其进行光滑处理，然后进行二次微分的方法，取得了良好的效果。

Solving the model by characteristic curve method, two groups of characteristic curves and corresponding related equation are gained in high speedstates and low speedstates.

5采用特征线法对模型进行分析求解，在高速低密度区和低速高密度区分别得到了两组特征线和对应的特征关系式。

According to the feature of case design method, first characteristic parametric curve laws about case is studied, and by classifying parametric curves the solving accuracy is improved.

按实例化设计方法的特点，首先研究了实例特征参数曲线规律，并将其分类组织提高实例的搜索速度和问题的求解精度。

The proposed method can reconstruct curves from data set with arbitrary topology, such as simply connected, multiple connected and closed scattered points, keep the shape characteristic of point set well, especially in the segments with high curvature, and provide effective methods and technologies for the screw reconstrucion.

因此最短路逼近算法有效地解决了单连通、多连通和封闭的数据点集的曲线重建问题，较好地保持了数据点集的形状和走向，尤其是带尖点的数据点集的形状特征，为旋转面、螺旋面和可展曲面面的重建提供了有效方法和技术。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。