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quadratic polynomial
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  二次多项式
    The results indicate the dimensionless equation between the thickness of the frozen wall and the temperature distribution approximates linear,the dimensionless equation between the thickness of the frozen wall and the frozen time is quadratic polynomial.
    结果表明:在积极冻结期冻土墙厚度与温度分布的无因次方程近似为直线方程、与时间的无因次回归方程为二次多项式方程;
短句来源
    In the paper,the quadratic polynomial function smoothing-method is used to smooth the sampling data,which is proved to be effective in filtering the high frequency noise.
    采用二次多项式滑动平滑法对采样数据进行平滑,有效地滤除了信号中的高频噪声。
短句来源
    The quadratic polynomial method and the artificial neural network (ANN) response surface method are in common use and belong to the local response surface methods, which only match the real limit state surface well in the area near the confirmatory calculation point.
    常用的二次多项式响应面及常规的神经网络响应面均属于局部响应面,其仅在验算点附近(±σ)处与真实极限状态曲面符合较好。
短句来源
    Influenced by the integrality and weathering breakage degree of rock,the biggish different is existed between dynamic elastic modulus gained by dynamical method and static elastic modulus obtained by static method,and the relationship between dynamic and static value of elastic modulus is approximatively expressed as a relationship of quadratic polynomial function.
    研究表明,由于受岩体的完整性和风化破坏程度等影响,岩石试件用动力法求得的动弹性模量和用静力法求得的静弹性模量均存在较大差异,且岩石动静弹性模量的关系呈二次多项式函数关系。
短句来源
    In this paper,the quadratic polynomial function is used to reconstruct the response surface in search of the possible breakdown point,and the BP neural network is adopted to reconstruct the response surface around the possible breakdown point,fitting the limit state function.
    针对这种情况,文章采用二次多项式函数重构响应面来寻求设计验算点; 然后在设计验算点附近,采用BP神经网络重构响应面,拟合极限状态函数;
短句来源
  “quadratic polynomial”译为未确定词的双语例句
    Based on the process and analysis of the data from orthogonal test, a series of the quadratic polynomial regression formula on the relations between the circle-crossing time or the differential coefficient of frozen wall and the four influencing factors have been obtained.
    通过对正交试验数据的整理、分析,获得冻结壁交圈时间和厚度差异系数与四个影响因素之间的回归公式,简要分析了渗流水作用下冻结壁形成的规律。
短句来源
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  quadratic polynomial
The velocity of the sheet is a quadratic polynomial of the distance from the slit and the sheet is subjected to a linear mass flux.
      
The interpolant is obtained patching together cubic with quadratic polynomial segments; it is co-monotone and/or co-convex with the data.
      
Cubic-spline and discrete-quadratic polynomial techniques are presented for reliably computing up to third-order derivatives of experimental information.
      
An algorithm to recover bit timing is proposed which maximises a quadratic polynomial approximation to the log-likelihood function.
      
The formulae are characterized by the presence of an infinite series whose general term consists of a linear recurrence damped by the central binomial coefficient and a certain quadratic polynomial.
      
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On the base of studying on the mathematic model about the temperature field of the frozen wall used for protecting the deep foundation ditch and accounting for engineering factors, a series of model tests are completed for researching the dynamic temperature field of the frozen wall according to the simulation theory. The results indicate the dimensionless equation between the thickness of the frozen wall and the temperature distribution approximates linear,the dimensionless equation between the thickness of...

On the base of studying on the mathematic model about the temperature field of the frozen wall used for protecting the deep foundation ditch and accounting for engineering factors, a series of model tests are completed for researching the dynamic temperature field of the frozen wall according to the simulation theory. The results indicate the dimensionless equation between the thickness of the frozen wall and the temperature distribution approximates linear,the dimensionless equation between the thickness of the frozen wall and the frozen time is quadratic polynomial. The calculating methods about the average temperature and the thickness and the frozen time of the frozen wall are put forward based on the experimental results. It is convenient and available to keep the temperature of the frozen soil wall using the foam plate.

在研究直线形冻土墙用于深基坑支护时其温度场数学模型的基础上,考虑工程因素,根据相似理论,对冻土墙温度场进行了模拟试验研究。结果表明:在积极冻结期冻土墙厚度与温度分布的无因次方程近似为直线方程、与时间的无因次回归方程为二次多项式方程;提出了冻土墙平均温度、厚度、积极冻结时间的推算方法;用一定厚度的泡沫塑料板对冻土墙保温是方便而可行的。

In the paper,the quadratic polynomial function smoothing-method is used to smooth the sampling data,which is proved to be effective in filtering the high frequency noise.Two data process methods both by Discrete Fourier Transform(DFT)and by Fast Fourier Transform(FFT)are compared.An algorithm used to analyse the leakage current and the reference voltage simultaneously in frequency domain is also provided.

采用二次多项式滑动平滑法对采样数据进行平滑,有效地滤除了信号中的高频噪声。对数据处理的两种方法———离散傅立叶变换和快速傅立叶变换进行了比较。给出了一种能够同时对泄漏电流和参考电压进行频域分析的算法。

The response surface method for structural reliability analysis is often used when the performance function is unknown. The paper points out that the response surface methods should be divided into the local response surface method and the whole response surface method. The quadratic polynomial method and the artificial neural network (ANN) response surface method are in common use and belong to the local response surface methods, which only match the real limit state surface well in the area near the...

The response surface method for structural reliability analysis is often used when the performance function is unknown. The paper points out that the response surface methods should be divided into the local response surface method and the whole response surface method. The quadratic polynomial method and the artificial neural network (ANN) response surface method are in common use and belong to the local response surface methods, which only match the real limit state surface well in the area near the confirmatory calculation point. The whole and the improved whole response surface methods of ANN and fuzzy neural network (FNN) put forward in this paper belong to the whole response surface methods which match the real limit state surface well in the whole area. Through illustrations and contrast analysis, it can be known that the improved whole response surface methods of ANN and FNN are the best among all above methods, by which the amount of calculation of finite element analysis can be reduced as well as the accuracy of calculation can be increased.

对功能函数不能明确表达的可靠度分析问题,常采用响应面法。本文提出把响应面区分为局部响应面和全局响应面。常用的二次多项式响应面及常规的神经网络响应面均属于局部响应面,其仅在验算点附近(±σ)处与真实极限状态曲面符合较好。本文提出的全局神经网络及模糊神经网络响应面、改进全局神经网络及模糊神经网络响应面则属于全局响应面,其在全局范围均与真实极限状态曲面符合良好,故其对全局有较好预测效果。文中对以上各种响应面法计算效果及其对全局预测效果通过算例进行了对比分析,其中改进全局神经网络及模糊神经网络响应面法计算精度较好,进行有限元分析次数最少,该方法用于大型复杂结构的可靠度分析,可相应提高工作效率和解题质量。

 
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