该文介绍了FISH(Fluorescence in situ hybridization)技术与DGGE/TGGE、PCR扩增技术、共聚焦激光扫描显微镜以及生物传感器等结合使用,可直观形象的研究微生物在废水处理系统中的形态、生理变化,以及微生物种群的演替的规律;为筛选和...该文介绍了FISH(Fluorescence in situ hybridization)技术与DGGE/TGGE、PCR扩增技术、共聚焦激光扫描显微镜以及生物传感器等结合使用,可直观形象的研究微生物在废水处理系统中的形态、生理变化,以及微生物种群的演替的规律;为筛选和驯化活性污泥或生物膜中的对废水处理起主导作用的微生物,提供更加有效、快速、可视的信息,促进废水处理技术的发展。展开更多
We present the numerical simulation results of a model granular assembly formed by spherical particles with tIertzian interaction subjected to a simple shear in the athermal quasi-static limit. The stress-strain curve...We present the numerical simulation results of a model granular assembly formed by spherical particles with tIertzian interaction subjected to a simple shear in the athermal quasi-static limit. The stress-strain curve is shown to separate into smooth, elastic branches followed by a subsequent plastic event. Mode analysis shows that the lowest-frequency vibrational mode is more localized, and eigenvalues and participation ratios of low- frequency modes exhibit similar power-law behavior as the system approaches plastic instability, indicating that the nature of plastic events in the granular system is also a saddle node bifurcation. The analysis of projection and spatial structure shows that over 75% contributions to the non-affine displacement field at a plastic instability come from the lowest-frequency mode, and the lowest-frequency mode is strongly spatially correlated with local plastic rearrangements, inferring that the lowest-frequency mode could be used as a predictor for future plastic rearrangements in the disordered system jammed marginally.展开更多
文摘该文介绍了FISH(Fluorescence in situ hybridization)技术与DGGE/TGGE、PCR扩增技术、共聚焦激光扫描显微镜以及生物传感器等结合使用,可直观形象的研究微生物在废水处理系统中的形态、生理变化,以及微生物种群的演替的规律;为筛选和驯化活性污泥或生物膜中的对废水处理起主导作用的微生物,提供更加有效、快速、可视的信息,促进废水处理技术的发展。
基金Supported by the National Natural Science Foundation of China under Grant Nos 11272048 and 51239006the European Commission Marie Curie Actions under Grant No IRSES-294976
文摘We present the numerical simulation results of a model granular assembly formed by spherical particles with tIertzian interaction subjected to a simple shear in the athermal quasi-static limit. The stress-strain curve is shown to separate into smooth, elastic branches followed by a subsequent plastic event. Mode analysis shows that the lowest-frequency vibrational mode is more localized, and eigenvalues and participation ratios of low- frequency modes exhibit similar power-law behavior as the system approaches plastic instability, indicating that the nature of plastic events in the granular system is also a saddle node bifurcation. The analysis of projection and spatial structure shows that over 75% contributions to the non-affine displacement field at a plastic instability come from the lowest-frequency mode, and the lowest-frequency mode is strongly spatially correlated with local plastic rearrangements, inferring that the lowest-frequency mode could be used as a predictor for future plastic rearrangements in the disordered system jammed marginally.
