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纳米材料的特殊结构决定了其具有大的比表面积、高的表面活性等特点,因而在力学、热学、光学、电磁学等方面都具有广泛的应用。以表面活性剂形成的胶束和乳液等为模板制备纳米材料是一种常见的方法,该方法可以大大降低溶剂的表面张力并改变体系的界面组成和结构,已经引起了研究者们的高度重视。有序介孔材料具有规则可调的纳米级孔道,可用作吸附剂、催化剂、催化剂载体或模板。以表面活性剂自组装形成的聚集体为模板合成有序介孔...
对自制的聚乙二醇(PEG)修饰的四氧化三铁(Fe3O4)纳米颗粒进行处方优化,并对其体外释药机制进行研究。方法 采用Box-Behnken效应面法优化Fe3O4纳米颗粒的处方;通过测定不同时间点Fe3O4纳米颗粒的粒径考察其常温下物理化学稳定性;利用超声搅拌法制备分别负载盐酸多柔比星、灯盏乙素、氟尿嘧啶3种不同类型药物的Fe3O4纳米颗粒,并采用透析法对Fe3O4纳米颗粒的释药能力进行研究,再应用...
经过多组对比实验，通过XRD、AFM、SEM等表征手段优化了BST薄膜的制备工艺。结合BST基薄膜器件的电极制备、微结构加工制备了太赫兹频段电可调的频率选择表面。通过太赫兹测试系统验证了在太赫兹频段BST薄膜的可调性，在电场作用下通带频率可以从0.85 THz调节到0.87 THz，结合仿真研究给出了确定铁电薄膜在THz频段介电参数的方法。相关研究可用于精确测定铁电薄膜在THz频段的介电特性，为铁...
纳米板振动特性的两类尺度效应研究
非局部应变梯度理论 纳米板 自振频率 小尺度参数
2019/3/12
利用非局部应变梯度理论研究了纳米板横向自由振动特性。通过迭代法获得非局部应力的渐近表达式,利用哈密顿变分原理推导了纳米板的振动控制方程。针对四边简支边界条件,运用双重三角级数法给出了板固有频率的表达式,然后研究了非局部参数、材料特征参数、几何尺寸对纳米板自振频率的影响。数值结果表明：非局部效应会弱化纳米板的等效刚度,因而使板的固有频率降低,应变梯度效应则与之相反,两类效应仅在纳米尺度下对自振频率有...
ON THE ESTIMATION OF POLARIMETRIC PARAMETERS FOR OIL SLICK FEATURE DETECTION FROM HYBRID POL AND DERIVED PSEUDO QUAD POL SAR DATA
SAR RISAT-1 CTLR pseudo-quad pol correlation coefficient sigma naught
2018/11/19
Oil spills in oceans have a significant long term effect on the marine ecosystem and are of prime concern for maritime economy. In order to locate and estimate the oil spread area and for quantitative...
光学影像量测仪（图）
表面特征 光学影像量测仪 重点实验室
2018/11/3
中文名称：光学影像量测仪，主要功能：常用附件： 标准校正板 主要用途： 本设备主要用于通孔直径、沟槽高度、表面特征的结构尺寸等零件特征尺寸的量测
纳米流体液滴撞击固体壁面的铺展动力学特性是基于液滴沉积实现高效传热传质过程的关键因素,然而由于纳米流体的非牛顿流变特性及液滴内微流动与纳米颗粒的耦合作用,目前对纳米流体液滴撞击固体壁面的铺展动力学行为缺乏足够的认识.本研究利用了两步法分别配制了分散有3种纳米颗粒的均匀稳定纳米流体(碳纳米管、石墨烯、纳米石墨粉),并对流体的流变特性进行了测量分析.利用显微高速数码摄像技术捕捉了液滴撞击固体壁面的动态...
纳米阵列中气体驱替液体的流动特征
纳米阵列 气驱水流动 微纳米流动 毛细管力
2018/5/15
纳米尺度下气体驱动液体流动特征在纳流控芯片及页岩气开发中具有广泛的应用前景. 利用管径规格为292.8 nm,206.2 nm,89.2 nm,67.0 nm,26.1 nm的氧化铝膜为纳米阵列,进行气驱水实验和单相气体流动实验,分析纳米尺度下气驱水流动特征. 实验表明,纳米阵列中气驱水时气体流量随驱动压力变化经历三个阶段：第一阶段流量缓慢增大,且比单相气体流量降低约一个数量级;第二阶段纳米阵列中...
WAVELET FUSION FOR CONCEALED OBJECT DETECTION USING PASSIVE MILLIMETER WAVE SEQUENCE IMAGES
passive millimeter wave sequence images sum of squared difference wavelet fusion concealed object detection
2018/4/30
PMMW imaging system can create interpretable imagery on the objects concealed under clothing, which gives the great advantage to the security check system. Paper addresses wavelet fusion to detect con...
A PRELIMINARY INVESTIGATION ON COMPARISON AND TRANSFORMATION OF SENTINEL-2 MSI AND LANDSAT 8 OLI
Sentinel-2 Landsat Spectral response function (SRF) Cross-calibration Transformation Consistency Uncertainty
2018/4/30
A PRELIMINARY INVESTIGATION ON COMPARISON AND TRANSFORMATION OF SENTINEL-2 MSI AND LANDSAT 8 OLI Timely and accurate earth observation with short revisit interval is usually necessary, especially for ...
A HYPERSPECTRAL BASED METHOD TO DETECT CANNABIS PLANTATION IN INACCESSIBLE AREAS
EO-1 Hyperion Hyperspectral data preprocessing Cannabis Morocco Spectral Angle Mapper (SAM)
2018/4/30
The increase in drug use worldwide has led to sophisticated illegal planting methods. Most countries depend on helicopters, and local knowledge to identify such illegal plantations. However, remote se...
STITCHING TYPE LARGE APERTURE DEPOLARIZER FOR GAS MONITORING IMAGING SPECTROMETER
Polarization Depolarizer Muller matrix Imaging Spectrometer Stitching Numerical Analysis
2018/4/30
To increase the accuracy of radiation measurement for gas monitoring imaging spectrometer, it is necessary to achieve high levels of depolarization of the incoming beam. The preferred method in space ...
OIL SPILL AISA+ HYPERSPECTRAL DATA DETECTION BASED ON DIFFERENT SEA SURFACE GLINT SUPPRESSION METHODS
Oil Spill Detection Hyperspectral Data Glint Suppression Wavelet Transform Enhanced Lee Filter
2018/4/30
The marine oil spill is a sudden event, and the airborne hyperspectral means to detect the oil spill is an important part of the rapid response. Sun glint, the specular reflection of sun light from wa...
A BAND SELECTION METHOD FOR HIGH PRECISION REGISTRATION OF HYPERSPECTRAL IMAGE
Hyperspectral Image High Spatial Resolution Image Registration CRLB Theory Band Selection Algorithm
2018/4/30
During the registration of hyperspectral images and high spatial resolution images, too much bands in a hyperspectral image make it difficult to select bands with good registration performance. Terrib...
WATER MAPPING USING MULTISPECTRAL AIRBORNE LIDAR DATA
Land Cover Classification Multispectral LiDAR Optech Titan Point Cloud Processing SLIER
2018/4/30
This study investigates the use of the world’s first multispectral airborne LiDAR sensor, Optech Titan, manufactured by Teledyne Optech to serve the purpose of automatic land-water classification with...