基于分层光学扫描的三维数字化测量技术

采用切削分层光扫描测量与计算机数据信息合成相结合的方法，有效地解决了具有复杂内外腔结构零件的三维数字化测量。该方法比传统三维测量速度快、自动化程度高，能同时准确测量零件内外腔表面，零件边缘测量误差可控制在CCD两个像素内。利用获取的铝合金精密小箱体三维数据，在计算机上重构了零件的三维模型，并用RP技术制造出了零件物理原形。     

均匀分层介质中标准矢量波函数的构成

研究了在均匀分层介质中构成标准矢量波函数的必要条件。研究结果表明在均匀分层介质中构成标准矢量波函数一般需遵循Morse-Feshbach判据外，领示矢量只能选取与折射率变化方向一致的那根坐标轴单位矢量。但在某些特定的条件下，对领示矢量的选取条件可以放宽为只需遵循Morse-Feshbach判据即可。     

Multi-component SC Lax Integrable Hierarchy of Soliton Equations and Its Multi-component Integrable Coupling System with Two Arbitrary Functions

A new simple loop algebra ^-GM is constructed, which is devoted to establishing an isospectral problem.By making use of generalized Tu scheme, the multi-component SC hierarchy is obtained. Furthermore, an expanding loop algebra ^-FM of the loop algebra ^-GM is presented. Based on FM, the multi-component integrable coupling system of the multi-component SC hierarchy of soliton equations is worked out. How to design isospectral problem of mulitcomponent hierarchy of soliton equations is a technique and interesting topic. The method can be applied to other nonlinear evolution equations hierarchy.     

水准折光及双波长激光效应

本文从“同温度层不完全平行于地面,且在变化”的“任意分层”假设出发,导出了水准折光修正公式,并利用光的色散效应在10~(-6)的精度要求下,求得r=r_T=h_1/h_2=(n_(01)-1)/(n_(02)-1)=常数最后指出,研制双波长激光水准仪的必要性和可能性,并提出了研制此种仪器的技术参数.     

PREPARATION OF POLY（METHYL METHACRYLATE）/LAYERED DOUBLE HYDROXIDES NANOCOMPOSITES via in situ SOLUTION POLYMERIZATION

An exfoliated layered double hydroxides/poly(methyl methacrylate)(LDHs/PMMA)nanocomposite was prepared by in situ solution polymerization of methyl methacrylate(MMA)in the presence of 4-vinylbenzenesulfonate intercalated LDHs(MgAl-VBS LDHs).MgAl-VBS LDHs was prepared by the ion exchange method,and the structure and composition of the MgA1-VBS LDHs were determined by X-ray diffraction(XRD),infrared spectroscopy and elemental analysis.XRD and transmission electron microscopy(TEM)were employed to examine the structure of LDHs/PMMA nanocomposite.It was indicated that the LDHs layers were well exfoliated and dispersed in the PMMA matrix.The grafting of PMMA onto LDHs was confirmed by the extraction result and the weight fraction of grafted PMMA increased as the weight fraction of LDHs in the nanocomposites increased.     

In Situ Fabrication of ZnS Semiconductor Nanoparticles in Layered Organic-inorganic Solid Template

Ordered ZnS semiconductor nanoparticles were in situ synthesized in metal halide perovskite organic/inorganic layered hybrids (CnH2n 1NH3)2ZnCl4 (n=10 and 12) by reaction of their spin-casting films with H2S gas. Transmission electron microscopy, UV-vis spectroscopy and small-angle X-ray diffraction were used to characterize the morphology and the structure of formed nanoparticles. Obtained results indicate an effective way to incorporate functional inorganic nanoparticles into structured organic matrices.     

急性髓细胞白血病基因筛选模型的贝叶斯分析

基因表达数据蕴含着大量的生物信息,在生物基因信息研究中,筛选表达水平发生显著变化的差异基因是认识疾病形成机理和辅助靶点药物研究的关键问题.根据急性髓细胞白血病(AML)的基因表达数据,构造基因均值差序列,建立贝叶斯分层混合模型,并为模型的参数赋予具有基因生物特征的先验信息.采用马尔可夫链蒙特卡洛(MCMC)算法对模型参数进行估计,并筛选出急性髓细胞白血病差异表达基因.在实际数据分析中,从美国生物信息中心(NCBI)的高通量基因表达数据库中获取急性髓细胞白血病基因数据集,从经过非特异滤波预处理的14688个急性髓细胞白血病基因中筛选出711个差异表达基因,差异表达基因数仅占急性髓细胞白血病基因总数的4.84%,这一结果与基因差异表达的生物学原理相吻合.     

多图模型的联合估计的群桥方法

高斯图模型研究独立随机变量之间的关系.主要针对该模型,提出了一种分层惩罚连接单个图模型估计的多图模型.研究了新模型的高维统计性质,给出模型的参数估计,并得到了相合性及稀疏性两大理论.     

基于COSM的三维显微图像复原算法研究

光学分层显微成像技术(COSM)不仅可用于去除非聚焦层杂散光的影响以及噪声的干扰,而且能复原样本的清晰三维像,将成为提取微流体的三维温度和速度场分布信息的有效工具.本文研究了基于已知点扩展函数的6种COSM成像算法,详细讨论了6种COSM成像算法的原理和实现,构造了三维样本图像和点扩展函数模型,并对复原结果进行了分析....     

一种基于加权最多邻近点距离的相关跟踪方法

针对相关跟踪过程中障碍物遮挡,噪声和目标形变对跟踪稳定性的影响,提出了一种基于加权最多邻近点距离的相关跟踪方法。采用模板图像与实时图像的相似点个数并与距离进行加权的方式定义相似性度量,结合相似度对目标模板进行更新,采用Kalman算子预测目标位置并进行分层搜索,实现快速稳定跟踪目标。实验结果表明,该方法能较好地抑制噪声和目标遮挡的影响,目标遮挡重新捕获成功率高于80%,目标跟踪精度低于10个像素。