基于DWT-SVD的视频水印

提出了结合离散小波变换（DWT）和奇异值分解（SVD）的数字视频水印算法。选取规范化质心（NCG）大于阈值的视频进行分帧,利用每帧视频的DWT分解后的中频分量系数进行SVD,修改奇异值,完成二值图像水印的嵌入,提取时利用部分原始视频的边信息,实现了水印的半盲提取。仿真结果表明,该算法具有良好的不可见性,并且保证了对常见的滤波,压缩,剪切等攻击的鲁棒性。     

短肢剪力墙结构模板安装方法

结合工程实践,介绍了小钢模拼装成大模板用于短肢剪力墙的施工方法。详细介绍了定型大钢模板施工过程中采取的措施和安装控制要点。     

浅论和谐社会财富公平配置的方法

随着市场经济的发展,出现了社会财富分配不公和收入差距过大的问题,严重影响我国社会主义和谐社会的构建。本文提出按照市场调节初次分配、政府调节再次分配和效率与公平统一的方法配置社会财富。     

液压凿岩卡钎机理及自动防卡钎新方案

在分析液压凿岩卡钎机理的基础上，为提高液压凿岩过程自动防卡钎能力，提出了一种可预防各类卡钎的液压凿岩自动防卡方案，并设计了相应的液压控制系统，且对其进行了实验验证。理论和实验结果表明，新的自动防卡钎方案提高了凿岩自动防卡钎能力，具有重要实用价值。     

动力学去耦提升N@C_（60）@C_（60）H_（28）单晶中电子自旋相干时间的实验研究

内嵌富勒烯N@C60与C60H28分子共结晶形成的单晶N@C60@C60H28,能够实现N@C60的有序排列,从而在实现基于内嵌富勒烯的可扩展量子计算上具有着突出的潜力.本项研究中,我们对单晶N@C60@C60H28中氮电子自旋的弛豫时间和弛豫机制做了详细的测试和分析,厘清了N@C60@C60H28样品中氮电子自旋相干时间（T2）降低的主要原因来自C60H28分子中质子核自旋热库的影响.通过动力学去耦实验技术,我们进一步有效地抑制了这一不利影响,实现了氮电子自旋T2时间的显著提升.这一研究结果对于更好地保护编码于有序富勒烯内电子自旋上的量子信息,进而实现量子计算,具有重要的意义.     

培养隐喻意识,促进多义词学习

根据认知语义学的理论,隐喻是词义扩展的重要途径。本文通过对概念隐喻的定义,运行机制的探讨,将该理论具体运用到英语词汇教学当中,分析了如何通过概念隐喻来学习英语多义词,探索培养隐喻意识与英语词义扩展能力之间的关系,以及可能的教学方法。     

Optimizing ultrasensitive single electron magnetometer based on nitrogen-vacancy center in diamond

The measurement of the weak magnetic field in nanoscale resolution and at room temperature is always a significant topic in biological, physical, and material science. Such detection can be used to decide the characterization of the samples, such as cells, materials, and so on. Nitrogen-vacancy (NV) center in diamond has been proved to be able to detect a magnetic field with nano Tesla sensitivity and nanometer resolution at room temperature. Here we experimentally demonstrate an optimized NV center based single electron magnetometer in a commercial diamond and under a home-built optically detected magnetic resonance (ODMR) microscope. With current technology, we change the optically detected time window to get a better signal to noise ratio, and use dynamical decoupling to increase the slope of magnetic field amplitude versus fluorescence signal. By employing the 8-pulse XY-4 dynamical decoupling sequence we achieve a sensitivity of 18.9 nT (Hz)(1/2) , which is 1.7 times better than spin echo. We also propose a NV center based scanning diamond microscope for electron and nuclear spins detection as well as nanoscale magnetic resonance imaging. If it is realized, the NV center based magnetometry will have wide application in the future.