查询词典 parabola

The feed radiation angle, both in horizontal and in vertical plane has to be the same, regardless the ellipticity of offset parabola.

馈源的方向角在水平和垂直都应当相同。而不管偏馈抛物面的椭圆率如何。

Signal analysis;parabola parameter spline curve;Empirical Mode Decomposition;Intrinsic Mode Function;Hilbert transform

信号分析；抛物参数样条曲线；经验模态分解；固有模态函数；希尔伯特变换

The reason for this is that ratio F/D determines the angle the edges of the parabola are seen from the focus.

原因就是F/D的比率限定了抛物线焦点到边缘的角度。

This paper describes the conjunction relationship of the basic point of the flat surface outline on the parts and reveals the internal law of the intersections connecting with the typical curve;The principle of the calculation and the characteristics on straight line to parabola basic points are illustrated.

介绍了平面轮廓零件各组成元素之间的连接关系，并揭示了典型曲线交接的内在规律，阐述了直线与抛物线交接点的计算原理和特点，总结归纳直线与抛物线连接的处理方法，以及自动淘汰无效基点的基本准则。

This paper describes the conjunction relationship of the basic point of the flat surface outline on the parts and reveals the internal law of the intersections connecting with the typical curve;The principle of the calculation and the characteristics on straight line to parabola basic point s are illustrated.

介绍了平面轮廓零件各组成元素之间的连接关系，并揭示了典型曲线交接的内在规律，阐述了直线与抛物线交接点的计算原理和特点，总结归纳直线与抛物线连接的处理方法，以及自动淘汰无效基点的基本准则。

With long time study of many researchers, now three algebra function methods are formed which are parabola algorithm , suspension cable algorithm and perturbational algorithm.

经不少学者、专家的不断研究，迄今巳形成3种代数函数法：抛物线、悬索曲线、摄动法未取代悬链线作近似计算。

According to theory analysis and example computation, the following conclusions are obtained.1. During the analysis on the cable shape in the suspension bridge"s completion state, the pre-displacement of saddle and the case that the cable and stiff girder commonly bear the second-stage dead load should be considered.2. When supposing the construction ideal initial state in the first time, if the initial state model is established according the cable"s span central sag in the bridge"s completion state, and the reasonable correction formulation is created in the iteration process, the result can converges fast.3. The cable shape in the bridge"s completion state is not parabolic, nor catenary. It is between parabola and catenary. Actually it is funicular polygon closer to the catenary.

通过理论分析和实例的计算表明：1在悬索桥主缆成桥线形分析过程中，须考虑主塔鞍座的偏位以及二期恒载由主缆和加劲梁共同承担的实际情况；2在第一次假设施工理想初态时，以成桥状态已知的主缆跨中垂度建立施工理想初态模型，同时在迭代计算的过程中，建立合理的修正公式，才能使收敛的速度快：3在成桥状态时主缆的线形既不是抛物线，也不是悬链线，而是介于抛物线与悬链线之间，更接近于悬链线的索多边形。

In this paper, we show a formula for the arciform area enclosed with a parabola and a straight line by means of two kinds of clever separation and the knowledges of elements mathematics such as the sum formula of infinite decreasing geometric sequence .

文章运用两种巧妙的分割和利用无穷递缩等比数列求和公式等初等数学知识，求出了抛物线与相交直线围成的弓形面积计算公式。

The results show that the density of gritstone is decreased gradually as the temperature increasing; so that it can be ignored; the longitudinal wave velocity is linearly decreased when the temperature increasing, and decrease rate of it follows the law of conic; R is one temperature point, which makes the law of tensile strength of gritstone after high temperature follows the law of parabola; and the maximal tensile strength appears when the operative temperature is R. After the temperature is higher than 700 ℃, tensile strength is small and change range is small when the temperature is increased.

结果表明，高温后粗砂岩的密度随试验温度的升高减小幅度很小，几乎可忽略不记；高温后试件中纵波波速的传播随温度升高基本呈线性降低，而减小率呈二次曲线规律变化；存在一个温度点R，使高温后试件的抗拉强度呈开口向下抛物线关系变化，且在R温度作用后试件抗拉强度达到最大；当试验温度大于700 ℃后，试件的抗拉强度变得很小，且当温度升高时变化幅度也很小。

You can change the slope of the horizontal line to observe what effect on the parabola.

你可以改变水平线的角度，观察其对水平线的影响。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。