函数

Of or relating to an inverse or an inverse function .

用一个函数的自变量表达另一个函数的因变量而得到的函数。

Three common mathematic models are always employed to predict the growth of regional or urban population,including exponential function,inverse hyperbolic function,and logistic function.

预测人口增长的数学模型通常采用3种函数，即指数函数、Logistic函数和双曲函数。3种模型的数学根源都在于二阶Bernoulli式微分方程，它们是不同的生长条件下的Logistic方程的特解。

This paper is committed to expatiate on the attribute of the functions profoundly from several aspects such as the mapping, inverse functions, compound function and etc and discuss the attributes of mapping and several special functions energetically.

本文着重从几个方面如映射、函数的复合、反函数等深刻阐述了函数的性质，且重点讨论了映射、几种特殊函数的性质和应用。

According to invalidate transform between non-linear constraining function and linear constraining function, and the disable partial differential coefficient of first order for objective function, GA has been chosen for the built mathematic mode, also, the conception of GA, its computing process, features, and operating parameters are introduced irrespectively in this article, meantime, a managerial software for oil pipeline's optimization is programmed.

根据优化模型中的非线性约束函数无法化为线性约束函数，目标函数无法求一阶偏导数的特点，本文从众多优化方法中选择遗传算法对所建立的数学模型进行求解，并对遗传算法的概念、计算步骤、特点、运行参数等逐一进行介绍，并编写了输油管道优化运行管理的软件。

Thirdly, the problems of institution investor'optimal liquidation strategy and optimal liquidation time were investigated with the conditions that the price of risky asset followed arithmetic Brown motion and liquidation velocity was limited. The problems involved the following scenes: price impact function was linear expression of liquidation velocity which was boundary closed set with an isolated point; price impact function was stochastic; price impact function was nonlinear.

接着，当风险资产的价格服从算术布朗运动，且对投资者的变现速度做出限制时，研究机构投资者的最优变现策略和最优变现时间问题，其中包括：价格冲击函数为变现速度的线性函数，变现速度是一带有孤立点的有界闭集；价格冲击是随机形式；价格冲击是变现速度的非线性函数。

It is found that there are similarities in terms of spectral integral among the wind input source terms given by Jeffreys, Sverdrup and Munk, and Plant and among the wave breaking dissipation source terms given by Tsikunov,Hasselmann and Philips,although the original forms and the physical considerations of these source terms are significantly different.

发现Jeffreys，Sverdrup和Munk以及Plant的风能输入源函数在谱积分意义下具有相似性，而Tsikunov，Hasselmann和Phillips的破波耗散源函数在谱积分意义下也具有相似性，尽管这些源函数的原始形式和物理背景显著地不同。

Adopting generalized Jordan block and algebra equivalence transform method, all of the transfer functions at different load points can be transformed to state-space description with time variable. The steady robustness of three different mode of control systems were researched by mathematic analysis. It shows that: for the high order inertia controlled object with the characteristic of nonlinear and time-variable that described by the set of transfer functions, the Luenberger function observer established according to its any algebra equivalence state-space description, if some conditions can be met, there would be a matrix of T with n′n satisfied the Sylvester matrix equation TA- FT=GC.

采用广义约当块及代数等价变换方法，可将分段的传递函数描述转换为变参数的状态空间描述，对3种典型控制系统的稳定鲁棒性所进行的理论研究表明，对同一组传递函数描述的具有非线性和时变特性的高阶惯性受控对象，依据其任一代数等价的状态空间描述所构建的Luenberger函数观测器，在满足一定的条件时，存在n′n解阵T满足Sylvester矩阵方程TA- FT=GC。

For the sake of accurately estimating the contact force, we describe a new method, in which the contact force is considered as a jump function of time, and by use of response to jump function, the history of impact force is detected in the duration of rotor contacting with stator.

为更准确地获得接触作用力，本文将接触过程中转子所受作用反力函数视为在微小时间间隔下的阶跃函数，提出一种计算接触作用力的新模型，利用系统对阶跃函数的响应可以得到转子与定子碰摩时的切向摩擦力与法相作用力的时间历程及相应的位移、速度量。

In this paper the Karnaugh map for simplifying logic functions is used in computing canonical covers based on the equivalence between the theory of functional dependencies and logic algebra.

本文依据函数依赖理论与逻辑代数对应部分的等价性，引入化简逻辑函数的卡诺图法求函数依赖集的规范覆盖。

The prerequisite of the correct use of karnaugh map is to full in the map with the given logic function correctly. Karnaugh map can be used to transform logic function into various simplest expressions and check the race and hazard of logic function. It has a wider range of important applications in the analysis and design of combinational logic circuit and sequential logic circuit.

正确运用卡诺图的前提是把给定的逻辑函数正确填图，可以利用卡诺图将逻辑函数化简为各种最简表达式；可以用来检查逻辑函数的竞争冒险等；在组合逻辑电路和时序逻辑电路的分析与设计中更有广泛的重要应用。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。