大孔径静态干涉光谱仪图像压缩技术

从图像压缩的角度分析了大孔径静态干涉成像光谱仪成像原理，并提出了一种新的遥感多光谱图像压缩方案。新方案利用大孔径静态干涉成像光谱仪推扫成像特点提出了一种低存储量，帧间小波域匹配的图像序列压缩方法，提高图像质量3～4dB。为了保证图像的光谱信息在8倍压缩比下有效应用，系统采用了一种新的感兴趣区域(ROD编码技术。感兴趣区域编码时，由于方案中采用率失真优化斜率提升，而不是比特平面移位，从而使图像在相同的光谱分辨率下拥有更好的空间分辨率。实验结果表明，算法大大保护了图像的光谱特性，在8倍压缩比下，满足了该类干涉多光谱遥感图像的质量要求。     

Effect of the Initial Laser Phase on the Interaction Between Relativistic Electron and Ultra－Intense Laser Field in a Strong Uniform Magnetic Field

We investigate the influence of the initial laser phase on the interaction between relativistic electron and ultraintense linear polarized laser field in a strong uniform magnetic field. It is found that the dynamic behaviour of the relativistic electron and the emission spectrum varies dramatically with different initial laser field phases.The effect of changing initial phase is contrary in the two parameter regions divided by the resonance condition.The phase dependence of the electron energy and velocity components are also studied. Some beat structure is found when the initial laser phase is zero and this structure is absent when the initial laser phase is a quarter of a period.     

2-Harmonic Maps Between Riemannian Manifolds and Conservation Laws (Ⅱ)

For harmonic map f: M→N,P.Baird and J. Eells have successfully foundout its stress-energy tensor S_f=e(f)g- f*h,which is called 1-stress-energy tensorin order to differ from what we’ll develop later.In view of the original defini-tion of 2-harmonic maps,people would ask what is the associated 2-stress-energytensor and the second conservation law of 2—harmonic maps.     

Studies Towards the Total Synthesis of Methyl Isosartortuoate： The Synthesis of a Cyclic Precusor of the Diene Unit

The preparation of the key intermediate 4 of the methyl isosartortuoate is described. The macrocyclization was completed through an intramolecular [ 2,3]-Wittig ring contraction. The four necessary stereogenic carbons were established by Sharpless asymmetric AE and AD reaction.     

Bredt规则和双环桥烯化合物

本文评述了Bredt规则和双烯化合物特征及合成发展。     

递推数列的通项

递推数列是数列中的一类非常重要的问题，一般地，可以通过给出数列的第一项（或前若干项），并给出数列的某一项（或前若干项）的关系式来表示数列，这种表示数列的方式叫做数列递推方式．     

微光CCD摄像器件灵敏阈研究

本文提出了视频信噪比转移函数概念,建立了摄像CCD微光图像灵敏(?)方程.实验证实了理论模型的合理性.根据这个方程用计算机模拟计算了几种条件下微光CCD摄像器件探测曲线.分析这个结果后提出了提高CCD微光图像探测能力的几种途径.     

激光光解NO2产物NO（X^2Ⅱ）的REMPI离子谱的标识与研究

利用Nd．YAG激光器三倍频、输出波长为=355nm的激光光解NO2分子，可产生NO分子．将NO分子通过共振增强多光子电离(REMPI resonance enhanced multiphoto ionization)及飞行时间(TOF time of flight)质谱技术，获得振转态分辨的NO(X^2Ⅱυ″J″)离子谱NOγ(0，0)，7(0，1)，7(1，1)。通过理论计算，可将NO离子带的P、R、Q支线进行标识。NO分子的离子信号强度与UV电离激光能量(λ≈226nm)之间关系能用二次方曲线很好拟合。它表明NO分子是通过(1 1)双光子吸收而电离。这些结果对NO分子的电离动力学提供了有益的信息。     

傅里叶变换光谱仪中角反射体特性的研究

本文分析了傅里叶变换光谱仪中用平面反射镜作为动镜时的晃动量问题,然后讨论了用角反射体作为动镜时对角反射体及其晃动量的要求,最后给出角反射体比平面反射镜具有更高分辨率的结论.