摘要：In order to improve the super-resolution reconstruction effect of the single image, a novel multiple dictionaries learning via support vector regression(SVR) and improved iterative back-projection(IBP) are *** characterize the image structure, the low-frequency dictionary is constructed from the normalized brightness of low-frequency image patches in a discrete-cosine-transform(DCT) *** determined by Gaussian weighting are added to the input vector to restore more high-frequency information when training the high-frequency image patch dictionary in the space *** post-processing, the improved IBP is employed to reduce regression errors each *** results show that the peak signal-to-noise ratio(PSNR)and structural similarity(SSIM) of the proposed method are enhanced by 1.6%—5.5% and 1.5%—13.1% compared with those of bicubic interpolation, and the proposed method visually outperforms several algorithms.

摘要：窄线宽半导体激光器广泛应用于雷达和传感等领域,因此窄线宽激光器的研究具有十分重要的意义。设计采用了电反馈的结构,从激光器发射出来的光经过一个专门设计的频率鉴别器,来稳定激光器的中心波长。光电探测器将频率鉴别器发射出来的光转化成电流,与激光器内部探测器的电信号比较,比较之后的差值反馈到激光器将激光器的线宽锁定在环路带宽范围内;从而将激光器线宽由原始的0.5nm降低到0.08nm。

摘要：开发 IC卡水表 ,对 IC卡水表的硬件和软件作了详细的介绍 ,硬件采用单片机 AT89C5 1作为控制芯片 ,由L CD液晶显示 ,并用 AT2 4 C0 1作为 IC卡的信息存储芯片 ,具有对流量和温度的采集功能 .软件功能主要包括读卡和水量管理功能 .该水表操作管理方便 ,还可用于暖气计费 .