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曲线回归

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In order to improve the high-performance concrete quality of longer brittleness, lower tensile strength, particularly the less descending branch in stress-strain curve compared with that of ordinary concrete. The breakthrough of this thesis lies in the mixture of short carbon fiber. Four factors such as water-binder ratio, volume ratio of short carbon fiber and blending value of high efficiency water-reducing admixture were selected as variable. Experiment was carried out by utilizing uniform design. Regression equation was established by regression analysis of the compression strength and the split tensile strength separately utilizing SPSS software. The process of optimization was obtained with the aid of MATLAB. Finally the optimized ratio was acquired.

为了改善高强混凝土由於水泥自缩、湿涨造成的脆性大、抗拉强度低,特别是应力-应变曲线的下降段不及普通混凝土的特点,本文以掺入短碳纤维为突破口,选取水胶比、砂率、短碳纤维的体积比、高效减水剂掺量四个因素作为变量,利用均匀设计安排试验,用SPSS软件对抗压强度和劈拉强度分别进行回归分析而得到回归方程,用MATLAB进行优化处理,进而求出最优配比。

A method was developed to determine the activation energy and material parameters in the hyperbolic sine constitutive equation.The activation energies determined are 570 kJ/mol and 548 kJ/mol for steel T122 in saturation stress and peak stress,respectively.The values of critical strain for dynamic recrystalli...

采用应变硬化速率—应力曲线图较精确地获得了饱和流变应力和峰值应力;用回归法确定了双曲线本构方程中的变形激活能及材料常数,确定了T122钢在饱和应力和峰值应力条件下的变形激活能分别为570和548 kJ/mol;采用力学方法直接从流变曲线确定了T122钢发生动态再结晶的临界应变量,并回归出临界应变量与Zener—Hollomon参数的关系式。

By deep analyzing the tested value of the concrete strength with the rebound method and combining with the inverse regression theory, a rebound strength curve of three-parameter inverse regression is put forward.

基于对回弹法检测混凝土强度被检测量,结合逆回归理论提出了一种逆回归三参数回弹法测强曲线模型。

By deep analyzing the tested value of the concrete strength with the rebound method and combining with the inverse regression theory,a rebound strength curve of three-parameter inverse regression is put forward.

基于对回弹法检测混凝土强度被检测量,结合逆回归理论提出了一种逆回归三参数回弹法测强曲线模型,将随机性较大的混凝土回弹值作为因变量,随机性较小的抗压强度值作为自变量,并且增加了一个位置参数,更加符合工程的实际情况。

The ration of Pd to P is defined as the stressing uniformity coefficient of one steel line. Through com prehensive analysis of test data, the variation of P(reading of preaure metre on tensile jack)with the uniformity coefficient can be deseribed by thefunctional r...

经对试验数据进行整理、分类组合及综合分析,找出了锚索的张拉力P(张拉千斤顶上压力表读值)与均匀性系数的=A·PB函数关系,再进行回归分析,从显著相关的回归曲线上,可直观地得出单根钢绞线在锚索张拉锚固时各种工况下不同位置上受力的均匀性。

The concept and definition of linear process with independent increments were presented. Then the regression model and analysis method for linear process with independent increments were established. Furthermore, the regression equation and confidence limit curves were given.

提出了线性独立增量随机过程的概念和定义,建立了线性独立增量过程回归模型及其分析方法,给出了回归方程和高置信度、高可靠度的置信上、下限曲线。

Standard curve ; linear regression method ; quasi-linear regression method ; function

标准曲线;直线回归法;拟线性回归法;函数

A new algorithm for modeling regression curve is put forward in the paper, it combines B- spline network with support vector regression.

摘要将ε-支持向量回归机与B-样条网络相结合,提出了一种建立回归曲线模型的新算法。

To reveal the complicated stress state of masonry structure in project and the effect of normal stress on shearing behavior,failure form and shearing strength,the shearing strength was obtained through experiments on 54 pieces of minitype sand-lime autoclaved aerated concrete masonry subjected to different normal stress.

为了解砌体结构在实际工程中所处的剪压复合的复杂受力状态,作用在砌体上的正应力对砌体的抗剪性能、砌体的剪切破坏形态及其对砌体抗剪强度的影响,对54个小型灰砂蒸压加气混凝土砌体进行静力抗剪试验,通过施加不同的正应力得到相应的抗剪强度;分析其破坏机理,归纳得出剪摩、剪压、斜压等破坏形态,并与砖砌体的破坏形态进行比较;根据试验结果回归分析得到灰砂蒸压加气混凝土砌体的静力剪压相关性曲线,与砖砌体的剪压相关性曲线进行对比分析,得到两者的异同;在静力剪压相关性曲线的基础上,依据变摩擦系数的剪摩理论,提出灰砂蒸压加气混凝土砌体静力抗剪强度的建议公式,并对摩擦系数进行了简化

From this, we can analyze the distribution rule of interaction force between pile and rock and give mathematical regress equation of curve.

5绘制结点应力与抗滑桩埋深关系曲线,分析曲线得出桩土间作用力分布规律,并求出曲线的数学回归方程。

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I will endeavour to find you some assistance.

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起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像,后来回台湾,甚至去年在北京,居然也四处看见她的海报,才惊讶她的魅力之大。

Ah may dee:You are chinese living in a democratic country.

你是居住在民主国家的中国人吧。