二次式的零点 zero of a quadratic
二次形式的极 polar of a quadratic form
二次形式的亏格 [数] genus of a quadratic form
多个多项式的二次筛法 MPQS
二次型的判别式 discriminant of quadratic form
二次形式的指数 [数] index of a quadratic form
二次方程式的因式分解 solve simple quadratic equations by factoring
偏颇的二次式估计量 Biased quadratic estimator
二次函数解析式的求法 Research of Mathematic Teaching-Learning
二次的多项式 quadratic
通过对正常和攻击样本的聚类分析，定义聚类簇中心的边界面接近度因子，实现对标准SVM二次式的改进；
Based on clustering normal and attack training samples, by defining approaching degree of boundary surface of every clustering center, quadratic expression of standard SVM is improved;
有了曼德尔勃特集合，蔬菜和二次多项式都变得有趣多了。这个方程序表现了类似图中的花椰菜菜籽的重复的复杂性。
Both vegetables and quadratic polynomials are made more interesting with the Mandelbrot set. The formula explains the repeating complexity of broccoli heads like this one.
道指本月已上涨4.5%，至10462.77点，因为一系列好于预期的经济数据缓解了对于二次探底式衰退的担忧。
The Dow has gained 4.5% this month to 10462.77, as a string of better-than-expected economic data has eased fears about a double-dip recession.
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