论文部分内容阅读
XeCl准分子激光角膜损伤阈值的研究
【机 构】
：
军事医学科学院二所中国科学院上海光机所
【出 处】
：
中国激光
【发表日期】
：
1986年13期
其他文献
感兴趣区域是图像中重要性较高并被优先关注的部分。传统视觉关注模型利用半径固定的圆描述感兴趣区轮廓,无法获得感兴趣区域的精确描述。提出一种基于自适应半径搜索的图像感兴趣区自动检测方法。提取图像的颜色、亮度和方向特征并生成多尺度的视觉显著图;通过计算显著图的全局显著度阈值获得视觉注意焦点搜索结束的条件;利用基于显著比的自适应半径搜索策略获取感兴趣区的精确描述信息。实验结果表明,新方法不仅能够提高对图像
How the optical timing system, the longitudinal diagnostics and the associated feedback systems prov
FERMI, the seeded free electron laser (FEL) in operation in Italy, is providing the User Community with unique fully coherent radiation, in the wavelength range 100–4 nm. FERMI is the first FEL fully synchronized by means of optical fibers. The optical ti
Structure and design are proposed for a kind of novel polymer Mach-Zehnder electro-optic (EO) switch using side-coupled M series-cascaded EO microrings. Formulations are proposed to analyze its switching characteristics. The dependences of the device’s pe
期刊
A geometry of transient-grating self-referenced spectral interferometry (TG-SRSI) is proposed for weak femtosecond pulse characterization. By using a reflective microscope objective (RMO), we build a compact, robust, and easy to adjust device with a highe
本文指出联合二能级气体激光器(包括流动的)空间烧孔被消除的条件是短程扩散时间远小于辐射寿命;当气体极其稀薄时,空间烧孔被消除的条件是短程自由运动时间远小于辐射寿命。并给出具体的判别公式。
期刊
Fabrication of three-dimensional proteinaceous micro- and nano-structures by femtosecond laser cross
Proteins are a class of biomaterials having a vast array of functions, including the catalysis of metabolic reactions, DNA replication, stimuli response and transportation of molecules. Recent progress in laser-based fabrication technologies has enabled t
为了将同一场景中具有重叠区域的序列图像合成一幅宽视角、高分辨率的图像,提出了一种结合尺度不变特征变换(SIFT)算法和Canny特征边缘提取的方法进行图像拼接。实验结果表明所提方法与SIFT算法相比,其参考特征点及待拼接特征点所需个数分别降低了26.56%和51.71%,匹配点对数降低51.65%,图像拼接用时降低了9.49%。此方法提高了图像拼接的精确性和实时性,能较好地解决图像间存在光照、旋转
针对多聚焦图像融合中聚焦物体边缘衔接处产生伪影的问题,提出一种基于非下采样Contourlet变换(NSCT)与引导滤波的多聚焦图像融合算法。该算法对多聚焦图像进行NSCT分解后,利用基于边缘的加权融合方案处理低频子带系数,利用双向拉普拉斯滤波器提取带通方向子带系数的边缘和显著信息,通过引导滤波器对初始融合权重进行修正,最后利用NSCT重构获得融合后的多聚焦图像。实验结果表明,与其他融合算法相比,
Over the last 20 years, silicon photonics has revolutionized the field of integrated optics, providing a novel and powerful platform to build mass-producible optical circuits. One of the most attractive aspects of silicon photonics is its ability to provi
期刊
We systematically investigated the tunable dynamic characteristics of a broadband surface plasmon polariton (SPP) wave on a silicon-graded grating structure in the range of 10–40 THz with the aid of single-layer graphene. The theoretical and numerical sim