中国照相感光材料工业呈上升趋势

数字图像处理网络化和影像市场全球化加快了国内感光材料工业的数码化进程，国内照相感光材料的生产产量和市场需求量有所扩大。本文叙述了2001--2007年国内照相感光材料工业上升的经营情况，照相材料产品结构继续调整和感光材料生产厂商不断推出消费类、医疗类和印刷类新影像产品等趋势。总之，数字影像产品已经成为国内照相器材市场的主流。     

林分平均高度卫星遥感新进展

林分平均高度是生态系统模型重要的输入参数之一,与生物量估算与碳循环研究高度相关。通过系统回顾林分平均高度研究的发展历史和最新进展,总结了不同传感器林分平均高度(SAR树高与LiDAR冠层高度)研究的主要模型和方法,通过单一传感器技术进行林分平均高度研究的内在特征的不同,分析了多传感器的区域林分平均高度联合反演方法的优劣性,并从科学发展趋势和社会需求出发,认识目前存在的主要问题与难点及未来面临的挑战和机遇,为今后更好地进行森林垂直结构和全球碳循环研究提供思路和借鉴。     

Preparation of Functionalized Polymersomes and the In Vivo Imaging

Recently, polymersomes self-assembled from amphiphilic block copolymers have attracted considerable interests with superior physicochemical properties. Here, the biotinylated block copolymers were blended with unmodified block copolymers to produce biotinylated polymersomes via film rehydration. Then, the avidin molecules were attached onto the biotin molecules covalently linked with block copolymers to form surface functionalized vesicles that are capable of carrying various biotinylated bioactive molecules, generating a relatively universal delivery platform. Hydrophobic fluorophores DAF and Nile Red were encapsulated respectively into hydrophobic membrane to prepare hydrophobic substances loaded polymersomes for investigating the nature of hydrophobic functionalization. Furthermore, the hydrophobic functionalized DiR-polymersomes were employed to perform in vivo imaging to survey the in vivo behavior for nano-polymersomes with hydrophobic functionalization.     

Nanoparticle-Based Systems for T1-Weighted Magnetic Resonance Imaging Contrast Agents

Because magnetic resonance imaging (MRI) contrast agents play a vital role in diagnosing diseases, demand for new MRI contrast agents, with an enhanced sensitivity and advanced functionalities, is very high. During the past decade, various inorganic nanoparticles have been used as MRI contrast agents due to their unique properties, such as large surface area, easy surface functionalization, excellent contrasting effect, and other size-dependent properties. This review provides an overview of recent progress in the development of nanoparticle-based T₁-weighted MRI contrast agents. The chemical synthesis of the nanoparticle-based contrast agents and their potential applications were discussed and summarized. In addition, the recent development in nanoparticle-based multimodal contrast agents including T₁-weighted MRI/computed X-ray tomography (CT) and T₁-weighted MRI/optical were also described, since nanoparticles may curtail the shortcomings of single mode contrast agents in diagnostic and clinical settings by synergistically incorporating functionality.     

An Approach to Analyse Errors Introduced in the Random Grid Strain Measurement Method

Abstract: The present work refers to the errors imposed by the recently introduced random‐grid mesh‐free full field strain measurement method. Excluding systematic errors of the digital camera, the method itself is not an error‐free procedure. A possible cause of errors could be the misplacement of the spot‐centre (centroid) with regard of the spot boundaries. Another cause of errors is the limited order of approximation in the field function. A third one, emerges from the so‐called ‘sub‐pixel effect’. This kind of error is difficult to trace, so direct comparison between the results of the method and exact solutions is required. In the present work, proper analytical or numerical derivations of those errors are presented and reasonable upper limits are estimated. Finally, numerical and experimental examples are presented to demonstrate the accuracy of the method.     

可变型住宅的探讨

在人们的价值观和对生活的需求日趋多样化的今天，单一的居住模式远远满足不了人们的要求。在这样的背景之下，可变型住宅作为新的居住模式渐渐得到了人们的重视。相继出现了SAR理论等重要的理论成果。     

逆合成孔径雷达成象及运动补偿技术

本文讨论了逆合成孔径雷达（ＩＳＡＲ）中的成象和运动补偿技术，介绍了笔者在逆合成孔径雷达方面所做的工作，并给出了一些ＩＳＡＲ成象的实验结果。