搜索结果: 91-105 共查到“知识库 光学”相关记录4759条 . 查询时间(3.165 秒)
运用原位高温拉曼光谱技术研究了KHSO4从室温至550℃的相变过程，分别基于密度泛函理论及量子化学从头算分析KHSO4晶体和K2S2O7熔体的分子振动和拉曼光谱散射活性，对拉曼光谱特征峰进行归属，并获取KHSO4与K2S2O7熔体团簇特征振动的拉曼散射截面，建立特征峰面积与物种浓度的直观关系，并通过Factsage数据库研究KHSO4分解过程的热力学性能.结果表明，210℃下KHSO4链状结构向二...
联吡啶RuⅡ/Ⅲ配合物二阶非线性光学性质的理论研究
金属RuⅡ/Ⅲ配合物 氧化还原 二阶非线性光学性质 密度泛函理论
2019/1/14
采用密度泛函理论（DFT）方法对联吡啶RuⅡ/Ⅲ配合物的几何结构、氧化还原性质、UV-Vis光谱及二阶非线性光学（NLO）性质进行计算.研究结果表明，醌基的引入能够有效增大第一超极化率（βtot）值，但醌基在氮苯基上位置的改变对βtot值影响不大.分子轨道和自旋密度分布分析结果表明，金属RuⅡ和副配体均能成为氧化中心，并且氧化中心位置不同
通过7-芘乙炔基-8-氮-7-去氮-2'-脱氧腺苷（2）和7-芘乙基-8-氮-7-去氮-2'-脱氧腺苷（3）2个脱氧腺苷类似物在双螺旋DNA（dsDNA）中构建芘基对，同时保持2'-脱氧腺苷的碱基配对专一性，探讨了芘基对的多种组合在dsDNA中的荧光光谱变化及其与dsDNA形成和解离的关系.DNA双螺旋的热稳定性和圆二色光谱表征结果反映了连接臂与芘基在dsDNA大沟区的相互作用.芘基荧光光谱表明，...
INFORMATION CONTENT ANALYSIS FROM VERY HIGH RESOLUTION OPTICAL SPACE IMAGERY FOR UPDATING SPATIAL DATABASE
Information Content Topographing Mapping GIS Remote Sensing VHR Images
2018/11/9
High resolution satellite images started with IKONOS imagery. After the launch of the very high resolution IKONOS in the 1990s, a new generation of commercial Earth-imaging satellites have pioneered a...
分析大鼠死后肾组织在不同温度下的傅里叶变换红外（Fourier transform infrared，FTIR）光谱数据，探究温度对死后大鼠肾组织FTIR光谱特征的影响。 方法 大鼠颈椎脱臼处死后置于4 ℃、20 ℃和30 ℃环境中，于不同时间点提取大鼠肾组织，采集FTIR光谱数据，并利用数据挖掘技术对数据进行分析。 结果 4 ℃、20 ℃和30 ℃环境组中部分时间点样本主成分分析结果具有明显聚类...
基于薄层色谱（TLC）与显微拉曼光谱（Micro-Raman spectroscopy）联用技术，对降压类保健食品中非法添加的3种化学成分（尼莫地平、拉西地平和尼群地平）进行原位富集检测，并对6种降压保健食品进行了测试.TLC法采用硅胶60F254铝合金薄层板为固定相，环己烷-乙酸乙酯（体积比5：4）混合溶液为展开剂，
基于荧光光谱分析技术，通过体外模拟生理环境实验和动物体内实验探索了地西泮与乙醇的协同作用机制.研究结果表明，在地西泮体内代谢初期，血液中乙醇的存在可以降低地西泮-人血清白蛋白（HSA）络合物的结合平衡常数，致使血液中地西泮游离分子的浓度相对增大，可加速地西泮分子的代谢速率，降低药物的半衰期，从而增强地西泮在体内的药效，产生协同作用.
ENDMEMBER EXTRACTION OF HIGHLY MIXED DATA USING L1 SPARSITY-CONSTRAINED MULTILAYER NONNEGATIVE MATRIX FACTORIZATION
Hyperspectral Imagery Nonnegative Matrix Factorization Multilayer Nonnegative Matrix Factorization Sparsity Constraint Endmember Extraction
2018/5/11
Due to the limited spatial resolution of remote hyperspectral sensors, pixels are usually highly mixed in the hyperspectral images. Endmember extraction refers to the process identifying the pure endm...
HIGH THROUGHPUT SYSTEM FOR PLANT HEIGHT AND HYPERSPECTRAL MEASUREMENT
Height measurement hyperspectral measurement stereo vision grating dispersion high throughput, phenotypes
2018/5/16
Hyperspectral and three-dimensional measurement can obtain the intrinsic physicochemical properties and external geometrical characteristics of objects, respectively. Currently, a variety of sensors a...
THE ONE TO MULTIPLE AUTOMATIC HIGH ACCURACY REGISTRATION OF TERRESTRIAL LIDAR AND OPTICAL IMAGES
Ground Lidar Optical Image Automatic High Precision Registration
2018/5/15
The registration of ground laser point cloud and close-range image is the key content of high-precision 3D reconstruction of cultural relic object. In view of the requirement of high texture resolutio...
COUPLE GRAPH BASED LABEL PROPAGATION METHOD FOR HYPERSPECTRAL REMOTE SENSING DATA CLASSIFICATION
Graph Label Propagation Semi-Supervised method Classification Hyperspectral Remote Sensing
2018/5/15
Graph based semi-supervised classification method are widely used for hyperspectral image classification. We present a couple graph based label propagation method, which contains both the adjacency gr...
THE RESEARCH OF CORRELATION OF WATER SURFACE SPECTRAL AND SEDIMENT PARAMETERS
Spectral Reflectance Sediment Chroma Indicators Sensitive Wave Bands
2018/5/14
In the method of survey underwater topography using remote sensing, and the water surface spectral reflectance R, which remote sensing inversion results were closely related to affects by the water an...
THE RESEARCH ON THE SPECTRAL CHARACTERISTICS OF SEA FOG BASED ON CALIOP AND MODIS DATA
Sea fog Low Cloud Caliop Modis Monitoring Spectral Characteristics
2018/5/15
In view of that difficulty of distinguish between sea fog and low cloud by optical remote sensing mean, the research on spectral characteristics of sea fog is focused and carried out。The satellite las...
EXAMINATION OF SPECTRAL TRANSFORMATIONS ON SPECTRAL MIXTURE ANALYSIS
Spectral Transformation Spectral Mixture Analysis NSMA BWVI Between-class Variance Within-class Variance Total-class Variance
2018/5/11
While many spectral transformation techniques have been applied on spectral mixture analysis (SMA), few study examined their necessity and applicability. This paper focused on exploring the difference...
HYPERSPECTRAL IMAGE DENOISING USING A NONLOCAL SPECTRAL SPATIAL PRINCIPAL COMPONENT ANALYSIS
Hyperspectral Images Noise Reduction Nonlocal Similarity Spectral Spatial Information Principal Component Analysis
2018/5/14
Hyperspectral images (HSIs) denoising is a critical research area in image processing duo to its importance in improving the quality of HSIs, which has a negative impact on object detection and classi...