Economic models often lead to the study of systems of equations.

经济模型经常导致对方程组的研究。

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The convergence properties of Newton's method for a type of overdetermined systems of equations were studied.

研究了一类超定非线性方程组的牛顿迭代法的收敛性。

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Algebra is stepping up: Prepare for linear equations and inequalities, and systems of equations in two variables.

代数的比重则会增加，考生要在线性方程、不等式、二元方程等方面做好准备。

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Mr. McMurray and his team of scientists have worked out advanced mathematical equations, complex graphs showing "cutting systems" and precise anatomical diagrams of chickens.

WSJ: Robots Can Perform Surgery, But Can They Debone a Chicken?

Nonlinear math equations and systems have been used to explain weight loss, the spread of happiness, strength of metals and hurricanes.

FORBES: Dividend Stocks Pay Better Than Treasury Paper

Instead of just looking at one gene at a time, it uses an emerging method called systems biology that marries differential equations, computer simulations, and wet-lab biology to try to understand how molecular circuits go awry in cancer.

FORBES: A New Way To Find Cancer Drugs