The book ＂micropedolog＂ by Kubieana and a large number of publications has induced many people to practice soil micromorphology. Quantification of the soil fabric and its components was a major challenge. The use of...The book ＂micropedolog＂ by Kubieana and a large number of publications has induced many people to practice soil micromorphology. Quantification of the soil fabric and its components was a major challenge. The use of the image analyses in soil science was a breakthrough. Attempts to make soil thin sections go back to the beginning of the 2oth century. Microscopic techniques and recently high resolution electron microscope and use of computer assisted imaging techniques enabled the in vitro study of soils in three dimensional levels. It is now possible to store and process massive amounts of data. Micro- morphological concepts and techniques are applied in paleopedological, ecological, and archaeological studies. The aim of this work was to examine soil micromorphological imaging in historical perspective.展开更多
传统的时间相关单光子计数(Time-correlated single photon counting, TCSPC)受计数率低、一维测量和采集时间长的限制,难以在生物医学中的推广.评述TCSPC的机理和应用,指出TCSPC是探测周期光信号内的单个光子、测量光子探测时间以及构...传统的时间相关单光子计数(Time-correlated single photon counting, TCSPC)受计数率低、一维测量和采集时间长的限制,难以在生物医学中的推广.评述TCSPC的机理和应用,指出TCSPC是探测周期光信号内的单个光子、测量光子探测时间以及构建信号周期内光子分布与时间关系的一种技术,具有多维光子采集特性,计数率近似当前可用的探测器容量.该技术可采集光子对波长和空间座标的分布,时间尺度在皮秒量级,在实验开始时可进行二次计数.多维TCSPC技术拥有近似于理想的计数效率,其时间分辨率仅受探测器渡越时间的离散限制.故TCSPC在生物医学光谱学中极具应用价值.典型应用包括,时域光学X线断层照相、记录生物系统内的瞬态现象、荧光寿命成像显微术、活细胞内荧光共振能量转移实验,以及用荧光关联谱探索染料-蛋白复合体.展开更多
文摘The book ＂micropedolog＂ by Kubieana and a large number of publications has induced many people to practice soil micromorphology. Quantification of the soil fabric and its components was a major challenge. The use of the image analyses in soil science was a breakthrough. Attempts to make soil thin sections go back to the beginning of the 2oth century. Microscopic techniques and recently high resolution electron microscope and use of computer assisted imaging techniques enabled the in vitro study of soils in three dimensional levels. It is now possible to store and process massive amounts of data. Micro- morphological concepts and techniques are applied in paleopedological, ecological, and archaeological studies. The aim of this work was to examine soil micromorphological imaging in historical perspective.
文摘传统的时间相关单光子计数(Time-correlated single photon counting, TCSPC)受计数率低、一维测量和采集时间长的限制,难以在生物医学中的推广.评述TCSPC的机理和应用,指出TCSPC是探测周期光信号内的单个光子、测量光子探测时间以及构建信号周期内光子分布与时间关系的一种技术,具有多维光子采集特性,计数率近似当前可用的探测器容量.该技术可采集光子对波长和空间座标的分布,时间尺度在皮秒量级,在实验开始时可进行二次计数.多维TCSPC技术拥有近似于理想的计数效率,其时间分辨率仅受探测器渡越时间的离散限制.故TCSPC在生物医学光谱学中极具应用价值.典型应用包括,时域光学X线断层照相、记录生物系统内的瞬态现象、荧光寿命成像显微术、活细胞内荧光共振能量转移实验,以及用荧光关联谱探索染料-蛋白复合体.
