变换

Ridgelet transform is introduced in the fifth chapter. It includes principle, implement method and application of this transform.

第五章单独对Ridgelet变换进行了介绍，包括该变换的原理、实现方法和应用。

We adjust the strength of embedded watermark in according to the visual model in the ridgelet domain.

论文根据小脊变换域中的视觉模型，按照小脊变换域中计算出水印嵌入强度的权重，用扩频的方法来嵌入水印信息。

The implement algorithm of adaptive fuzzy image enhancement is proposed in ridgelet transform domain.

提出了基于脊小波变换域的模糊自适应图像增强算法，利用脊小波变换在表示图像线性奇异边缘时具有独特的优越性，达到突出边缘和抑制噪声的目的。

Experiment results show that Ridgelet transform is more efective than the wavelet transform in seismic signal denoising.

数值实验结果表明，Ridgelet变换在地震信号去噪方面优于小波变换。

The proposed method is applied to Sepic converter, Lyapunov's function is constructed successfully and an asymptotic stable control law is obtained, simulation results confirm the effectiveness of the proposed control law.

以Sepic变换器为例，成功构造出Lyapunov函数，并且推导得到一种使Sepic变换器控制系统渐近稳定的控制律，仿真结果证实了该文提出的新型控制律的有效性。

Based on the working principle of fuzzy control and characters of soft-switching technology, it applies fuzzy control to soft-switching power converter and designs a normal fuzzy controller for SEPIC power converter introduced former. By simulating the fuzzy control system,it validates the availability and rationality of this fuzzy controller.

根据模糊控制的工作原理和软开关技术的特点，将模糊控制引入到软开关功率变换器中，为前面介绍的 SEPIC 功率变换器设计常规模糊控制器，并进行了仿真分析，得出仿真结果，验证了该模糊控制器的有效性及合理性。

Setting zero-current switching quasi-resonant SEPIC converter as example, it analyzing the switching mode of SEPIC converter in detail based on the instance of switches' on-off.

以零 电流开关准谐振 SEPIC 变换器为例，根据开关管的通断情况，详细分析了 SEPIC 变换器的开关模态。

Radon transformation was used to change the artifact part to sine space, and then we obtained the sinogram.

然后用雷登变换把伪影图像变换至弦空间，即得到弦图。

When the viewpoint is changing quickly, the rendering algorithm ignores some details of the diffuse component, otherwise the scene is rendered more precisely. The Specula highlight is dependent of the viewpoint, it must be processed in real time. We present an algorithm to get rid of the area that does not contain specula highlight quickly and calculate only the area that contains the specula highlight. In order to calculate the specula reflection and refraction component, we presented a new raytracing algorithm based on the environment map transformation. The environment maps are constructed at the sample points of the scene in the preprocessing phase. We add depth information in the environment maps and generate the exact reflection and refraction intensity with the transformation of a few pixels.

对于表面光亮度漫射分量，由于它与视点无关，可以把面片按照光照细节的分布预剖分成层次结构，然后在实时漫游时根据场景变化的快慢决定绘制的细致程度；对于镜面高光分量，由于它与视点有关，必须实时处理，我们提出了一种快速高光裁剪算法，通过简单测试，去除那些不包含高光的区域，只处理包含高光的区域；对于镜面反射分量和折射分量，我们提出了一种基于环境映照变换的快速光线跟踪算法，预先在场景的离散采样点处建立环境映照，然后根据入射点的位置，把邻近采样点处的环境映照上相关象素处的可见点变换过来，求取反射分量和折射分量。

The original video is spitted into a series of frame groups,for each frame in the group,the points of contour shape are described by MPEG-7,and taking advantage of hash function to calculate the keys between those points in the 1D- DFT transform domain and the watermark signals.

在该算法中，原始视频数据被分割成等帧数的视频组，利用MPEG-7的轮廓编码计算每个视频帧的主要物体轮廓坐标点集合；接着通过傅立叶变换得到该帧轮廓点形状不变量，利用哈希的方法计算水印信号并将这些不变量的有效值作为密钥之一；再对整个视频组的轮廓点进行傅立叶变换，得到其时间轴上的有效不变域，将水印信号嵌入在这个不变域的中频部分以确保了水印的鲁棒性。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。