significance

this code is tell about segmentation of an image

NASA worldwind插件，用于显示卫星轨迹，包含SatelliteTracker类。基于Direct3D技术。(NASA worldwind plugin for displaying satellite trajectory, including SatelliteTracker classes. Based on Direct3D technology.)

说明：  在OFDM系统中，采用限幅法降低峰均功率比，该文件包括了流程图和matlab源码(In OFDM system, using limiting PAPR reduction method, the document includes flow charts and source code matlab)

用matlab语言编写了一个GUI截面，通过该界面可以实现图像的傅立叶变换，反傅里叶变换，高低通滤波，以及把黑白图像转化成灰度图像等功能。(Matlab language with a GUI section, the interface can be achieved through the Fourier transform of the image, anti-Fourier transform, high and low pass filter, and the black and white image into gray image and other functions.)

根据所给定的节点值和节点上的函数值,取边界条件为 “左右两端的一阶导数值为零”, 编制构造三次样条函数的 Matlab 程序。 另附测试程序(Depending on the value of a given node and the node function value, taking the boundary conditions for the " right and left ends of the first derivative value of zero," the preparation of structural cubic spline function of Matlab procedures. Attached test program)

有限元TetrahedronElement的matlab程序(FEA matlab TetrahedronElement)

说明：  满足互易性条件下的几种经典的极化检测算法的仿真，包括恒虚警仿真和ROC曲线 Pd_Pf是对两种目标的仿真（两种目标的极化散射矩阵不同）(Simulation of several classical polarization detection algorithms under the condition of reciprocity, including CFAR simulation and ROC curve. Pd_ Pf is the simulation of two kinds of targets (the polarization scattering matrix of the two targets is different))

计算光子晶体透射的FDTD程序的matalb源程序(Calculation of photonic crystal transmittance of FDTD procedure matalb source)

侧边伸缩导航栏效果，精选ios编程学习源码，很好的参考资料。(The side effect of stretching the navigation bar, select learning IOS programming source code, a good reference.)

随着城市经济的快速发展和城市人口的不断增加，人类活动对城市环境质量的影响日显突出。(With the city' s rapid economic development and urban population increases, human activities on urban environmental quality more evident.)