Abstract : in view of the manufacturing method of continuous micro - optical elements with grayscale mask , the critical steps such as converting from element structure to gray - scale patterms , correction of gray - scale patterns , digitalization of gray - scale patterns and patlerns coding are presented 文摘:针对利用灰度掩模制作连续微光学元件的方法，介绍了从元件结构到灰度图形的转换，灰度图形的修正，灰度图形的数字化以及图形编码等关键步骤。
According to the different require of the phase mask , the holographic recording method for the design of linearly chirped phase mask is studied in this paper . the fringe formed by the interference of two spherical waves , whose density varies linearly with space , is used to record the chirped phase mask . the two design schemes proposed in this paper are analyzed and compared , and the experimental results are given 根据光纤光栅掩模的不同要求,研究讨论了用全息干涉方法制作线性啁啾位相掩模的设计方法,提出用两球面波干涉产生条纹密度随空间距离线性变化的干涉条纹记录啁啾位相光栅,分析比较了文中给出的两种设计方案,给出了实验验证结果,并且制作了线性啁啾光刻胶掩模。
In studying animal behavior and neurophysiology , this topic concentrates on hearing mechanisms , including the neural mechanism s of auditory precedence effect , the neural mechanism s of informational masking and energetic masking , the interaction between auditory cognitive processes and sensory gating processes , and the neurobiological mechanisms of auditory emotional learning 本研究以动物行为和动物神经生理为对象，重点探讨如下四个问题：听觉优先效应的神经生物学机制；信息掩蔽和能量掩蔽的神经生物学机制；听觉认知过程与感觉门控过程之间的交互作用；听觉情绪学习的神经生物学机制。
Compared with the lsb algorithm , the robustness of this algorithm is stronger ; compared with the echo hiding algorithm , the detection watermarking of this algorithm is easier , the calculation is simpler ; compared with the time - domain algorithm based on psychoacoustic masking , the calculation complexity is relatively low , the transparency does not rely on experience value , and the embedding amount is larger 与lsb算法相比,该算法具有较强的健壮性;与回声算法相比,该算法检测水印容易,计算简单;与基于心理学掩蔽模型时域算法相比,该算法计算简单,透明性不依赖经验值系数,且嵌入量大。基于振幅比较的数字音频水印(机密信息)隐藏算法。
Third , we implemeni and analyze the following audio watermark algorithms : the least significant bit algorithm in time domain , the watermark algorithin using percoptual masking , the watermark embedding algorithin based on wavelet tusform and based on quantizing wavelet transform coefficients 本文实现并分析了下面几种数字音频水印的算法：最低有效位时域水印算法，利用心理声学模型听觉掩蔽效应的加水印算法，使用量化小波变换系数加水印的小波域算法，对实验结果进行了分析。
Introduction : human ancient cradle of civilization - africa , with numerous ancient heritage and culture , the mysterious totem mask . each of the african tourist who are hoping to get souvenirs , now , if you are willing to use their brains and spend a little late effort you can see with their own eyes african mask , the special charm , not to hurry 人类古文明的发源地之一“非洲” ，拥有无数古老传统和文化，神秘的图腾面具，是每个到非洲旅游的人都希望得到的纪念品，现在，只要你肯开动脑筋，花上一小会儿功夫，你也能亲眼目睹“非洲面具”的特殊魅力，还不快来看看！
The processes include the deposition of the waveguide film , the design and fabrication of the mask pattern , the lithography , the metal coating with a magnetic sputtering , the lift - off process for the metal mask , the dry deep etching by icp , the slicing of the wafer , the polishing of the cutting edge , the fiber - to - waveguide alignment and at last , the performance testing . some edg chip samples are fabricated 对设计好的集成波导器件，本论文设计并试验了器件的制作的全部工艺，包括波导薄膜的沉积，掩模的设计制作，光刻，溅射金属薄膜，剥离法制作金属掩模，干法深刻蚀，硅片切割，端面磨抛，波导对准和性能测试。
Human ancient cradle of civilization - africa , with numerous ancient heritage and culture , the mysterious totem mask . each of the african tourist who are hoping to get souvenirs , now , if you are willing to use their brains and spend a little late effort you can see with their own eyes african mask , the special charm , not to hurry 人类古文明的发源地之一“非洲” ，拥有无数古老传统和文化，神秘的图腾面具，是每个到非洲旅游的人都希望得到的纪念品，现在，只要你肯开动脑筋，花上一小会儿功夫，你也能亲眼目睹“非洲面具”的特殊魅力，还不快来看看！
