查询词典 trigonometric

Methods For different body aerodynamic roll angles, proper wind-tunnel test schemes were selected and trigonometric series were used for aerodynamic interpolation.

按照不同的气动滚转角，进行合理有限的吹风，然后以三角周期函数进行插值。

With the continuous method, the displacement shape functions are constructed with the self-contained trigonometric function series, and then the formulae of normal stress and shear stress in the shear walls of the core tube subjected to a torque are brought forward.

根据结构连续化分析方法，采用完备的三角函数系形式表示正六边形核筒悬挂建筑结构中筒体在扭矩作用下的位移函数，并推导出核筒中的剪力墙的正应力和剪应力公式。

The trigonometric series model based on the grade inputs of standard surface and the road surface random spectral excitations of autoregressive model based on engineering data were calculated under the normal distribution, the uniform distribution and the congruence white noise input.

在正态分布、均匀分布和同余法产生的零均值白噪声的输入下，计算了基于标准路面等级输入的三角级数模型，以及基于实测数据的自回归模型的路面随机谱激励。

On the basis of the method of separating variables of sucker rod wave equation,in combination the matrix recursion technology with trigonometric series recursion technology,a kind of quick arithmetic of pump dynamograph in failure diagnosis technology of sucker rod pumping system is proposed.

在抽油杆柱波动方程分离变量法的基础上，将矩阵递推技术与三角级数递推技术相结合，提出了有杆抽油系统故障诊断技术中计算泵功图的一种快速算法，这种方法不仅适用于单级抽油杆采油系统，同时也适用于不同材质、不同杆径抽油杆组成的抽油系统。

Considering the difference of earthquake intensities in both sides of the fault zone, artificial earthquake waves were simulated by trigonometric series method with different seismic peak accelerations. Then the seismic failure numerical analysis was carried out, the weak areas of seismic failure and their reasons were discussed particularly.

考虑到断裂带两侧地震强度的区别，采用三角级数法模拟人工地震波时选用不同的地震峰值加速度，然后对其进行地震破坏数值分析，重点讨论了桥梁地震破坏的薄弱部位及其破坏原因。

The purpose of this dissertation is to study a principle or method to describe and analyze the complex problems with high gradients arising from practical engineering. The main contents cover:1. The Bezier function was introduced to approximate high gradient functions, and a suitable coupled function was derived. Some detail numerical results show that the Bezier-based function is dominant over other combination function such as polynominal and trigonometric series, when to describe a high gradient function.

针对工程中大量存在的高梯度问题进行函数逼近的研究，引入Bezier函数对高梯度问题进行函数逼近，构成以Bezier函数为主的复合逼近函数，数值考证表明：与常规多项式插值函数的逼近及"幂／三角"复合函数的逼近相比，基于Bezier函数的逼近函数对高梯度问题的描述具有明显优势。

The principles and steps of the methods were introduced, the sixth grade track ire-gularity PSD of U.S. railway samples in time domain were achieved by simulating trigonometric series respectively, the samples were taken as the inputting disturbances of a vehicle-track vertical dynamics model, the time response courses of vehicle system we- re obtained by numerical simulation.

介绍了国内外常用的轨道不平顺数值模拟方法的模拟原理和步骤，采用计算机仿真程序模拟出三角级数法生成的美国六级轨道不平顺谱时域样本，并以此作为车辆一轨道垂向动力学模型的输入激励，通过数值仿真得出系统的时间响应历程。

Example The periodic function shown in the Fig. is known as a half-wave rectified sine wave. Find the trigonometric Fourier series of the function f.

角频率为横坐标，每个正弦分量(直流分量相当于频率为零的正弦量)的大小为离散的纵坐标值

The article simulates German high-speed track spectrum by MATLAB with trigonometric series method.The arch is modeled by ANSYS and make mode analysis.

考虑轨道不平顺对于车桥振动的影响，本文采用采用德国高速轨道谱，借助MATLAB应用三角级数法数值模拟德国低干扰垂向不平顺样本。

Common mathematical functions such as trigonometric functions are standard, and you can add custom functions.

诸如三角函数这样的普通数学函数符合标准，并且你可以添加自定义的函数。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。