函数图

This paper, firstly, after a deep study of image mathematical models, sets up two kinds of image models namely Laplace partial differential equation model and biharmonic equation model and then obtains the eigenvectors of image by the methods of eigenfunction expansion and boundary recurrence.

本文首先较深入地研究了图象的数学描述，提出图象的Laplace偏微分方程和双调和方程两种模型，继而采用特征函数展开法和边界递推法分别求得图象的特征矢量。

For the automatic scaling and analysis of the ionospheric parameters, a method based on the empirical orthogonal function analysis of the ionospheric electron density profiles is proposed in this paper. This method is applied to the measured ionograms of CADI (Canadian Advanced Digital Ionosonde), which is set up at Beijing Space Environment Observation Station (403°N, 1162°E).

本文针对电离层频高图参数的实时自动度量和分析问题，提出了一种基于电子浓度高度剖面经验正交函数(Empirical Orthogonal Function，简称EOF)分析的频高图参数自动度量方法，并将该方法应用到位于北京空间环境观测站(403°N，1162°E)的CADI(Canadian Advanced Digital Ionosonde)数字测高仪观测频高图的实时自动度量和分析上。

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。

And using thinking of evolvable hardware design,it had realized a novel way in simplifying the given logic function,which was different from conventional method,such as algebra way and Karnaugh map way.Experiments showed that evolvable hardware method could solve simplification of large scale logic function.

作者在对演化硬件设计理论的学习研究中，尝试了用遗传算法在可编程逻辑器件上应用来实现对某一给定的逻辑函数进行化简。2代数法和卡诺图法介绍[1]先给定一个逻辑函数F，并对其进行化简：F=A+ABC+AC+CD(1)2.1代数法化简代数法化简就是运用代数的公理、定理和规则对逻辑函数进行化简。

Results There was a linear trend between logarithmic X and Y, the equation of logarithmic curve was able to be fitted, There was a linear trend between logarithmic Y and X, the equation of exponential curve was able to be fitted, There was a linear trend between logarithmic X and logarithmic Y, the equation of power curve can be fitted. There is a parabola pattern between X and Y, the equation of parabola was able to be fitted.

结果 X取自然对数与Y作散点图有直线趋势，拟合对数曲线方程；Y取自然对数与X作散点图有直线趋势，拟合指数曲线方程；X取自然对数与Y取自然对数作散点图有直线趋势，拟合幂函数曲线方程；原始数据X和Y成抛物线关系，拟合抛物线方程。

As one of the singular functions,step function plays an important role in the transient analysis of dynamic circuits and its definition is the key to analyze transient circuits.

1问题的提出如图1所示，阶跃函数是一种奇异函数，它在分析动态电路的过渡过程中具有重要的作用，而阶跃函数如何定义是正确应用它分析动态电路的关键。

In each entry, the primary line is the one that starts with an index number in square brackets.

函数调用图用-线分割成了很多块，每一块以类似 3 这样的索引开头的，这一行下面的所有函数都是被这一行的函数所调用的。

The derivative of a function can be interpreted either as a function whose value at x is equal to the gradient of the tangent line to the graph of y=f at x, or, alternatively, as a function that describes the instantaneous rate of change of y with respect to x at the point x.

一个函数的导数可以理解为一个函数的值无论是在x是等于切线的梯度的y图二F在x，或者，或者，作为一个函数描述瞬时速度y的变化的关于x的点x在f关于x的也可以表示为导数

An electromagnetic power steering kinematics model is built combined with the sensor and power equipment"s kinematics characteristic, then according to bond graph theory the bond graph model and diamond model of the electromagnetic power steering system are built based on the kinematics model. They could lead to the system"s transfer function, which is combined with automobile"s two freedom degree model, finally leads to the system"s model in condition with step input of steering wheel.

结合转矩传感器和电磁力发生装置的动力学特性建立了电磁式助力转向系统的动力学模型，然后在系统的动力学模型的基础上根据键合图理论建立了电磁式助力转向系统的键合图模型及其方块图模型，从而导出系统的传递函数，再结合二自由度汽车模型，最终建立了系统在方向盘转角阶跃输入下的模型。

The enhanced configuration device then reconfigures the Stratix device with this new data, and you have an updated system.The original data that was shipped with the system is still safely stored in the factory application space. So in case there was an error during the update process, perhaps during the remote transmission of the configuration file, the Stratix device can signal用信号通知 the enhanced configuration device

单个ALM的输入能够灵活地分割到两个输出功能块中，使得宽输入的功能函数能更快地运行，因为这可以在一个ALM中完成，不像传统的4输入查找表架构，实现多于4个输入的功能函数时，需要至少两个查找表，因此还需要额外的布线资源（见书P43图1.49）；而窄输入的功能函数能有效利用现有的资源，因为ALM能够灵活配置成不同的结构，来适应不同的输入数目。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。