Based on single quadratic equation of nitrogen, phosphorus and potassium under suitable fertilization rate, the optimum amount of N fertilizer among years had significantly increasing trend, the one for P fertilizer increased and K fertilizer with a slightly increase.

In the first one of them, the equation to calculate the phase shift between two adjacent frames is deduced by solving a monadic quadratic equation and then the arbitrary unknown phase shift can be calculated by using the two interferograms and the intensities of object and reference waves.

其一是通过求解一元二次方程，推导出相邻两幅干涉图之间相移量的计算式，由相邻两幅干涉图和物光及参考光强度计算任意未知相移量。

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This paper demonstrates how teachers instruct students to study the change and processing of mathematics problems.

文章通过对一元二次方程的演绎，展示教学过程中教师如何引导学生研究数学问题的变化与发展过程。

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Conclusions The quadratic model is fit for the curvilinear relationship of the migration length to radiation dose.

结论一元二次方程可以很好反映淋巴细胞DNA断片迁移长度与γ射线照射剂量之间的量效曲线。

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The relation between the cumulative release amount of cadmium with the leaching amount could be described with mono basic quadratic equation.

镉累积释放量与淋溶量的关系可用一元二次方程描述。

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Analysis on Some Common Errors in Solving Quadratic Equations

有关一元二次方程问题的误解剖析

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One Variable Quadratic Equation of Expulsion Coefficient from Source Rocks and Its Application

烃源岩排烃系数的一元二次方程及其应用

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In this paper, the author gives the formula of roots of a quadric equation over a field of2 k elements and presents the problem.

利用一元二次方程的求根公式构造二元二次方程组的迭代算法，通过图解二元二次方程组的解来说明迭代算法在实践中的应用。

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It overcomes the disadvantages of existing distortion calibration approaches. Assumed only with one order radial distortion, image coordinates of only 4 special collinear points are needed as well as the cross ratio of them.

该方法利用了透视投影中的交比不变性质，在畸变模型为一阶径向畸变的情况下，只需要空间共线的4个点的图像坐标和其交比，建立一元二次方程即可标定畸变参数。

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New irrigation and undersoil heating systems were also installed at the same time as the 2003 work.

在2003年的那次大修中,新的灌溉系统和地热系统也被安装上了.

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Many analysts consider below-average volume as a negative, because It'suggests a lack of eagerness.

许多分析师认为,交易量低于平均水平不是件好事, 因为这显示投资者缺乏买进的迫切愿望.

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She is often angry at her son because his performance in school is always below average.

她儿子在学校的成绩一直很差,这总是让她非常生气.

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Harry is below average in his lessons and Jim about up to average.

哈利的功课在中等以下,吉姆的功课刚达一般水平.

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Children are banded as averageaverage and below average.

入学儿童按好、中、差三等编班.

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It's obvious the products are below average quality.

很明显,这批产品地品质是中下水平.

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The snowfall this month is below average.

该月的降雪量低于平均水平.

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Their language development is below average.

他们的语言能力的发展低于一般水平.

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The riders , aged 27 to 44, began with slightly below-average bone density.

这些年龄在27-44岁间的赛手, 比赛开始时的骨密度都稍微低于平均值.

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Remember, half the people you know are below average.

永远记住: 你认识的人中定会有一半居于平均线以下.

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These marks are well above / below average.

这些分数远在一般水平以上[以下].

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The amount of snow this year has been below average.

今年的降雪量低于平均水平.

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