查询词典 focus of a parabola

If the growing demand for land increased gradually drawn into a parabola, then with this showing a similar parabolic growth curve is another urban development curve.

如果日益增长的需求逐渐增加，引起土地成抛物线，然后显示与此类似抛物线生长曲线是另外一个城市发展的曲线。

Analyses show that the theoretical form of camber curve should be a parabolic curve of 4 degree with horizontal tangents at both beam ends, while the common crane building praxis uses a parabola of 2 degree.

分析结果指出，合理的预拱曲线应当是两端具有水乎切线的四次抛物线，而不是通常采用的二次抛物线。

The parabola method is used in the process ef one dimensionoptimum solution of the coordinate transformation method.And also,difference coefficient proportionality is made use of jud...

在坐标轮换法的单维寻优中使用抛物线法，并且利用差商值之比判定框架梁、柱目标函数曲线的单调性，提高了寻优效率。

Furthermore,it can represent the elliptic curves,parabola and other quadratic curves without using rational form.

给出了一种基于三角函数的类三次参数曲线，该曲线不仅具有类似于三次Bézier曲线的诸多性质，而且无需有理形式即可精确地表示椭圆、抛物线等二次曲线。

The second and third structure movements of polymer involving slowpolarization effect is proposed by summing up a wide variety of experiment results, from Gibbsfunction, the parabola type relation between the reciprocal of slow dielectric coefficient andtemperature are obtained, which properly explains the β transition of polymer.

5归纳大量的实验结果，提出了聚合物的慢极化效应联系着二级和三级结构的运动；参照晶体中的软模理论，认为聚合物的β转变源自恢复力系数的软化；采用唯象理论，得出慢介电常数的倒数与温度T的抛物型关系，聚合物的β转变实验结果证明了理论的预言。

Typical methods of the first class consist of predictive deconvolution, normal moveout interconversion stacking, f-k transformation, tau-p transformation, parabola Radon transformation and beamforming. They can be called as seismography method based on the geometry. The second class methods, mainly bases on elasticity undulatory theory, through simulation or reversal development method forecast multiple, and then match it with the original data.

比较典型的方法有预测反褶积、正常时差变换叠加、f-k变换、τ-p变换、抛物线 Radon 变换和聚束滤波等，它们可以简称为基于几何地震学方法或"几何滤波类方法"；第二类主要是基于弹性波动理论的方法，通过模拟或反演方法来预测原始数据中多次波，继而从原始数据中匹配减去所预测的多次波。

The residual stress in the adherend is center symmetric, and the polynomial fitting of the S is obtained as parabola distribution.

被粘物中的残余应力呈中心对称，等效应力经多项式拟合后呈抛物线分布。

The findings indicate that, on the whole, the pattern of load transfer curves of adfreezing stress on a steel pipe pile stem and that of resistance stress on the pile tip are parabola and straight line, respectively; Due to the rheology effect, to different extent, adfreezing stress on the pile stem and resistance stress on the pile tip vary with time and relative displacement of pile-soil, respectively, and the settlement of pile tip varies with time tempestuously within 5 hours of loading, and then approximates to stability.

结果表明：模型钢管桩桩侧冻结力荷载传递函数曲线及桩端阻力荷载传递函数曲线其线状大致分别程抛物线及直线；由于流变效应的影响，桩侧冻结应力及端阻应力随时间有不同程度的变化；桩土相对位移和桩端下沉量开始5h内随时间变化较大，但加载5h后逐渐向稳定方向发展。

Applying theories of Vector geometry and differential calculus, this paper aims to infer the internal force and geometry equations for curved beam, whose axis curve is parabola and being distributing-load.

目的 对形心轴线为二次抛物线形曲线梁的内力、几何方程进行理论分析与公式推导。

The results show that an approximate parabola curve of infiltration depth versus infiltration time is proved. It is indicated that the main mechanisms of continuous netlike Si phase are dissolution-deposition and appendiculate deposition of Si.

组织观察结果表明， Si相呈网络状连续分布，其形成机制主要为浸渗时Si颗粒的溶解-析出机制和凝固过程中Si的附着析出机制。

But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.

但是，这是不可能的，只要是搞市场经济，是有风险的任何行动。

We're on the same wavelength.

我们是同道中人。