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快速傅立叶逆变换
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  “快速傅立叶逆变换”译为未确定词的双语例句
     This paper presents a fast algorithm based on IFFT wavelet moment.
     该文提出了一种基于快速傅立叶逆变换 (IFFT)的小波矩的快速算法。
短句来源
     This paper presents a new fast algorithm of wavelet moment based on IFFT.
     该文在小波矩和快速傅立叶逆变换方法的基础上提出了一种基于IFFT的小波矩的快速算法。
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  相似匹配句对
     THE FAST LAPLACE INVERSE TRASFORMS
     快速Laplace逆变
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     Quick Changeover
     快速线
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     This paper presents a fast algorithm based on IFFT wavelet moment.
     该文提出了一种基于快速傅立叶逆变 (IFFT)的小波矩的快速算法。
短句来源
     STUDY ON AN EXAMPLE OF THE INVERSE FAST COSINE TRANSFORM OF TWO DIMENSIONS SYSTEM
     二维快速余弦逆变实例研究
短句来源
     A Fast Inverse Hough Transform Based on Curve Feature
     基于曲线特征的快速Hough逆变算法
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This paper presents a fast algorithm based on IFFT wavelet moment.Wavelet moment has the invariant properties of the translation,scaling,and rotation wavelet moment also can describe the detail of image.This paper presents a new fast algorithm of wavelet moment based on IFFT. Experimental results prove that this method is very useful to predigest the wavelet moment computation.

该文提出了一种基于快速傅立叶逆变换 (IFFT)的小波矩的快速算法。小波矩除本身具有矩特征的旋转、平移、缩放不变性外 ,还具有对图像细节特征的描述。该文在小波矩和快速傅立叶逆变换方法的基础上提出了一种基于IFFT的小波矩的快速算法。实验结果证明 ,这种方法大大简化了小波矩的计算

Aiming at the problem of low accuracy and high price of pulp-flow meter currently used,a novel measuring method based on cross-correlation theory is proposed.Pulp consistency is separated into steady wavy signal and noise by using frequency analysis,cross-correlation analysis and wavelet analysis.Wavy signal is taken as flow sign of pulp in view of its property of high frequency and broad band.The up-stream and down-stream consistencies are sampled and cross-correlated in order to divide wavy signals from noise.The...

Aiming at the problem of low accuracy and high price of pulp-flow meter currently used,a novel measuring method based on cross-correlation theory is proposed.Pulp consistency is separated into steady wavy signal and noise by using frequency analysis,cross-correlation analysis and wavelet analysis.Wavy signal is taken as flow sign of pulp in view of its property of high frequency and broad band.The up-stream and down-stream consistencies are sampled and cross-correlated in order to divide wavy signals from noise.The pulp-flow is indirectly calculated through searching maximum cross-correlation function and corresponding peak time.FFT and IFFT algorithm are used to decrease calculating workload.The experimental results show that the method can not only improve measuring accuracy and EMC capacity,but also reduce price of equipment.

针对当前流量检测装置成本高、精度低的问题,提出了一种新型流量检测技术。运用频域分析、相关分析和小波分析等理论,对纸浆浓度信号中平稳随机成分和噪声干扰进行分离和研究,根据浓度信号中随机分量具有高频宽带特性和稳定性的特点,通过对2个采样点间浓度信号互相关函数的计算和相关函数最大值的寻优,从噪声干扰中提取有用信号,计算出流速和流量。为了提高系统的运算速度,采用了快速傅立叶变换和快速傅立叶逆变换等快速算法。

>=According to the characteristic and necessary of sea battlefield, the simulation of distributed virtual sea battlefields has three key questions on research. One is real - time rendering of dynamic ocean surface in wide area. Second is computer military create. The last is synchronization of network with larger data. Based on statistical wave models, this paper firstly realized a real - time rendering algorithm of ocean surface by used technologies of inverse Fast Fourier Transformation (FFT), lever of detail...

>=According to the characteristic and necessary of sea battlefield, the simulation of distributed virtual sea battlefields has three key questions on research. One is real - time rendering of dynamic ocean surface in wide area. Second is computer military create. The last is synchronization of network with larger data. Based on statistical wave models, this paper firstly realized a real - time rendering algorithm of ocean surface by used technologies of inverse Fast Fourier Transformation (FFT), lever of detail (LOD) and view - dependence visibility estimation and also classified ocean wave according to the correlation of wind and wave height. Secondly, computer military create and simulation of combat process was accomplished based on simpler combat and movement models. Lastly, based on the Win-sock TCP/IP protocol and using technology of multicasting and Dead Reckoning (DR), it resolved the question of net data synchronization and realized a multi - channel view mosaic in several PC. In a word, it achieves a better simulation effect through built diverse typical virtual sea battlefields.

针对海战场环境特点和需要,分布式虚拟海战场仿真主要解决大规模动态海面实时生成、计算机兵力生成和大规模网络数据同步三个关键技术问题。基于海浪统计学模型,采用快速傅立叶逆变换、层次细节技术和与视点相关的可见性预判断技术,实时生成动态海面,依据蒲氏风级与浪高的对应关系,模拟不同等级海浪;基于舰艇、飞机和导弹等实体作战和运动模型,采用简化技术,完成了计算机兵力生成和作战过程模拟;并基于winsock的TCP/IP协议,采用多播技术和推算定位技术,较好地解决了网络数据同步和多通道视景同步问题。通过建立的各种典型虚拟海战场环境.取得了较好的仿真效果。

 
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