Bay-site carboxyl functionalized perylene diimide derivative 1,7-COOH-PDI-C_(12)(PDI-COOH)was synthesized and distinct enhanced fluorescence was observed through combining with calcium ion(Ca^(2+))in THF/H_(2)O soluti...Bay-site carboxyl functionalized perylene diimide derivative 1,7-COOH-PDI-C_(12)(PDI-COOH)was synthesized and distinct enhanced fluorescence was observed through combining with calcium ion(Ca^(2+))in THF/H_(2)O solution.The assembly and fluorescence behavior of PDI-COOH/Ca^(2+)were studied in detail by changing hydration state with different concentrations.Based on the differences in assembly morphology and stoichiometric ratios of PDICOOH/Ca^(2+),we proposed the fluorescence emission mechanism of PDI-COOH/Ca^(2+)in THF/H_(2)O and THF,respectively.This work reveals a novel strategy of aggregated state fluorescence enhancement and reminds us of the important role of water in molecular fluorescence emission and assembly.展开更多
随着大数据和硬件的快速发展,细粒度分类任务应运而生,其目的是对粗粒度的大类别进行子类分类。为利用类间细微差异,提出基于RPN(Region Proposal Network)与B-CNN(Bilinear CNN)的细粒度图像分类算法。利用OHEM(Online Hard Example Mi...随着大数据和硬件的快速发展,细粒度分类任务应运而生,其目的是对粗粒度的大类别进行子类分类。为利用类间细微差异,提出基于RPN(Region Proposal Network)与B-CNN(Bilinear CNN)的细粒度图像分类算法。利用OHEM(Online Hard Example Mine)筛选出对识别结果影响大的图像,防止过拟合;将筛选后的图像输入到由soft-nms(Soft Non Maximum Suppression)改进的RPN网络中,得到对象级标注的图像,同时减少假阴性概率;将带有对象级标注信息的图像输入到改进后的B-CNN中,改进后的B-CNN可以融合不同层特征并加强空间联系。实验结果表明,在CUB200-2011和Standford Dogs数据集平均识别精度分别达到85.50%和90.10%。展开更多
针对化工企业氯化生产过程中所出现的安全隐患,基于Adobe Flash Professional CS5开发环境对化工企业氯化生产和控制过程进行模拟实现。采用"自上而下—>模块划分—>逐步求精"的研究思路,从氯化生产与控制过程的每个关...针对化工企业氯化生产过程中所出现的安全隐患,基于Adobe Flash Professional CS5开发环境对化工企业氯化生产和控制过程进行模拟实现。采用"自上而下—>模块划分—>逐步求精"的研究思路,从氯化生产与控制过程的每个关键部分入手,分模块模拟各个部分的工作流程。同时保持系统的协调配合,使模拟生产过程承接无误、动作连贯。将每个过程的关键环节呈现出来,产生一个详细直观的模拟过程,使管理、维护及操作人员能够步骤清晰、协调配合,也可为建立统一生产流程标准提供参考。展开更多
文摘Bay-site carboxyl functionalized perylene diimide derivative 1,7-COOH-PDI-C_(12)(PDI-COOH)was synthesized and distinct enhanced fluorescence was observed through combining with calcium ion(Ca^(2+))in THF/H_(2)O solution.The assembly and fluorescence behavior of PDI-COOH/Ca^(2+)were studied in detail by changing hydration state with different concentrations.Based on the differences in assembly morphology and stoichiometric ratios of PDICOOH/Ca^(2+),we proposed the fluorescence emission mechanism of PDI-COOH/Ca^(2+)in THF/H_(2)O and THF,respectively.This work reveals a novel strategy of aggregated state fluorescence enhancement and reminds us of the important role of water in molecular fluorescence emission and assembly.
文摘随着大数据和硬件的快速发展,细粒度分类任务应运而生,其目的是对粗粒度的大类别进行子类分类。为利用类间细微差异,提出基于RPN(Region Proposal Network)与B-CNN(Bilinear CNN)的细粒度图像分类算法。利用OHEM(Online Hard Example Mine)筛选出对识别结果影响大的图像,防止过拟合;将筛选后的图像输入到由soft-nms(Soft Non Maximum Suppression)改进的RPN网络中,得到对象级标注的图像,同时减少假阴性概率;将带有对象级标注信息的图像输入到改进后的B-CNN中,改进后的B-CNN可以融合不同层特征并加强空间联系。实验结果表明,在CUB200-2011和Standford Dogs数据集平均识别精度分别达到85.50%和90.10%。
文摘针对化工企业氯化生产过程中所出现的安全隐患,基于Adobe Flash Professional CS5开发环境对化工企业氯化生产和控制过程进行模拟实现。采用"自上而下—>模块划分—>逐步求精"的研究思路,从氯化生产与控制过程的每个关键部分入手,分模块模拟各个部分的工作流程。同时保持系统的协调配合,使模拟生产过程承接无误、动作连贯。将每个过程的关键环节呈现出来,产生一个详细直观的模拟过程,使管理、维护及操作人员能够步骤清晰、协调配合,也可为建立统一生产流程标准提供参考。
