This article would study on two types of discrete time predator-prey systems aiming at maximizing their profits and capture by using differential methods, quadratic function theory and Gordon theory respectively.

The effect of temperature on search rate ( a) and handling time ( Th) can be described by using the quadratic curve.

温度对瓢虫的捕食效应具有显著的影响，寻找效率（a）和处置时间（Th）与温度之间呈二次函数关系。

The deficiencies and recursive formulas of Bernstein polynomials for piecewise quadratic functions

分段二次函数的Bernstein多项式的退化性及递推公式

The security of the algorithm is mainly based on the difficulty of RSA crack, and the complexity of the algorithm is based on matrix transformations and quadratic function operations.

此算法的安全性主要是基于RSA破解的难度，而算法复杂度基于矩阵变换与基础二次函数运算。

The regulative effect of lime application on N, K contents, Ca2+-ATPase and sugarcane height resembled quadric curve.

石灰施用量与甘蔗叶片N、K含量、Ca2＋－ATP酶活性及甘蔗株高里极显著或显著的二次函数曲线相关；

Based on the characteristics of normal distribution function, this paper takes use of the sinx function to approach instead of the original quadratic function.

本文根据正态分布函数的特性，将原文中用二次函数逼近的方法，改用sinx函数去逼近。

The Research of Quadratic Function Curriculum Resource Exploitation Based on PowerDirector in Ninth Grade

PowerDirector下九年级一元二次函数课程资源的开发研究

Special Surfaces about the Gauss Curvature to be a Quadratic Function in 3-Dimentional Minkowski Space

三维Minkowski空间中高斯曲率为已给二次函数的几个特殊曲面

Methods Assume the distribution of blood perfusion to be quadratic along radius axis and adapt parameters accordingly. Solve the model given by Costa et al and compare with their result.

方法采用Costa等模拟肿瘤免疫竞争模型，设血液灌注沿肿瘤半径分布为二次函数并调整相应参数，求解模型并和Costa等的结果进行比较分析。

The direct and indirect energy gaps as a function of the alloy composition x are given in analytic form with the square polynomials.

并以二次函数形式给出了直接能隙和间接能隙与合金组分x间的变化关系。

Temperature data in transformer core during heating up under no-load test are analysed, and mathematical model for temperature rise curves at some test points established, thermal time constant in its expression assumed as a linear function of time.

分析了变压器空载试验时铁心温升过程的温度数据，得出试验点温升曲线的数学模型，其表达式中热时间常数为时间的一次函数，而试验点的极限温升可直接求出。

Concerning the products quality control, this article presents the process in which linear function is applied to industrial production.

结合工业生产中的产品质量控制，详细介绍了在生产实际中应用一次函数线性相关关系的过程。

How to make students better understand function in the knowledge age, the author gives her personal presentation of liner function and exponential function.

并以一次函数和指数函数为例，提出了如何帮助学生在知识时代更好地理解函数。

Application of Linear Function in Quality Control

一次函数在质量控制中的应用

From a control-flow perspective, an event is a function call, whereas an exception is a long jump across the stack, with unwinding semantics to destroy lost objects.

从控制流的角度看，事件是一次函数调用，而异常则是堆栈的突然跳跃，用展开的语义销毁丢失的对象。

AUTO QUOTED PRICE In this mathematics model, both cost and offer linear functions are used.

汽车报价模型中生产成本和产品报价考虑了更为通用的一次函数形式。

Through introducing experiments of linear function and mathematical modeling ( the line of best fit), the article investigates the issue of mathematics curriculum reform.

文章通过介绍一次函数的数学实验和数学建模（最佳拟合直线）的活动，对数学课程改革的问题进行探索。

Do you charge extra for delivery?

另收送货费 吗 ?

They don't charge extra.

他们不会额外收费.

We here charge extra 15 % of your bill for service.

我们这里要加收15%的服务费?

They charge extra for wine.

喝酒他们另外收费.