Model Simulation and Eigen-Analysis for Polarimetric Scattering from Tree Canopy in SAR Imagery

1.INTRODUCTIoNSatellite-bornemicrowaveremotesensingisaprimarytoolfortheglobalsurfacemonitoringbecauseofthepotentialofmicrowavetoobservetheearthsurfacestbIoughcloudsandtoprovidetheinformationoftheiaternalpropertiesofsurfacecovers.Greatadvanceofsatellite-borenmicrowaveprogramssuchasactiveSAR,ERSscatterometerandsoonduringtherecentdecadeshaspromotedthestudyoftheoreticalmodeling,datacalibration/validation,imageanalysis,surfaceclassification,andparameterinversionfortheseprograms.InthepaPer,to…     

聚酯微细纤维和普通纤维深染性能研究

选用红、黄、蓝3种不同结构的分散染料对聚酯微细纤维及普通纤维的深染性进行了研究,测定了色差参数△E、△L、△C、△H,表面深度K/S值,同时对耐光坚牢度也进行了对比,发现微细纤维的深染性、色泽鲜艳性及耐光坚牢度都较普通纤维差,分析了微细纤维染色性能改变的原因。     

H2与Cl2混合气光爆的最佳实验条件探讨

应用正交试验设计和直观分析法、方差分析法寻找Cl2与H2混合光爆的最佳实验条件。     

四种预处理方法对混合菌产氢特性的影响

以木质纤维素水解后的主要单糖D-木糖为底物,研究了酸处理、碱处理、热处理、红外照射处理对取自沼气发酵池的混合菌发酵制氢过程中的产氢量和产氢速率的影响.实验结果表明:四种预处理方法都可以提高产氢量和产氢速率.最佳的热处理条件为100℃,20～50 min.该条件下累计产氢量和最大产氢速率较未处理的混合菌发酵分别提高约30...     

强脉冲光选择性热效应的实验研究

强脉冲光（IPL）光子嫩肤技术是基于选择性光热解效应研发出来的非消融性嫩肤技术，目前在实际的应用治疗过程中，各参数的选择性效应仍不清楚，临床医师仅凭经验进行治疗．本文以SD大鼠为动物模型，考察了不同参数IPL作用下大鼠真皮层的热损伤厚度，初步分析了强脉冲光的波长、脉冲数及脉宽参数的选择性热效应．     

Ar原子与H_2低能碰撞分波截面的理论研究

使用Tang-Toennies势模型通过密耦近似(Close-Coupling)方法计算了Ar原子与H2分子在碰撞能量分别为E=0.15eV、0.25eV、0.35eV时的分波截面,对计算结果进行了讨论,总结了该碰撞体系的弹性微分截面(00-00)以及分波散射截面在弹性散射00-00和非弹性散射00-02、00-04的变化规律。     

轮胎空腔共振噪声的改进方法

汽车在行驶中，轮胎内部空腔共振将引起车辆的内部噪声. 首先论述轮胎内 部空腔共振噪声的特性, 然后推导声腔系统的运动方程, 进而提出一种降低轮胎声腔共振固有频率峰值的改进方法, 最后用实验验证其方法的正确性。     

Wave Polarization Scattering and Transmission Property in Randomly Distributed Chiral Spheroids

1. INTRODUCTIOnThe lack of geometric symwtry b~en an object and its mirror image is referred to as chirality or handedness(in optical literature it is called optical activity [1]). A chiral medium produces different responses to left- andright-circularly polarized light. Since the phenomenon of chirality was known earlier at the molecular level, thechirality study has been of illterest especially in the fields of chemistry and biochemistry [2]. In recent decades, ithajs become of increasin…     

Determination of ciprofloxacin hydrochloride in pharmaceutical preparation and biological fluid by Rayleigh light scattering technique

A highly sensitive and simple Rayleigh light scattering (RLS) method for determination of ciprofloxacin hydrochloride has been developed. Ciprofloxacin hydrochloride (CPFH) reacted with tetraphenylboron sodium(TPB) to form an ion-association complex in pH 5.31 aqueous solution, which resulted in a significant enhancement of the RLS intensity, which was linear with the concentration of CPFH in the range of 12.7–419 ng·mL⁻¹. The limit of detection for CPFH was 6.99 ng·mL⁻¹. The method is simple, highly sensitive and selective within a wide linear range. Appliying this method to determination of ciprofloxacin hydrochloride in pharmaceutical preparations and biological fluids obtained satisfactory results. Foundation item: Supported by the National Natural Science Foundation of China(20675059) and Research Foundation of Leshan Teachers’ College, China (Z0625)     

700—2000eV电子对氧分子的散射全截面绝对测量

介绍中能电子与氧分子的散射全截面测量，给出７００—２０００ｅＶ电子对氧分子的绝对散射全截面，高于１６００ｅＶ能区没有同类数据的文献报道．实验结果的系统误差和统计误差各为３％．对结果与已有的实验和理论结果作了比较．