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Strong optical nonlinearities of self-assembled polymorphic microstructures of phenylethynyl functionalized fluorenones

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Chinese Chemical Letters 2018年第2期29卷 297-300页

作者： Xinyue Li Sergey Semin Leandro A. estrada Chunqing Yuan Yulong Duan Jonathan cremers Paul Tinnemans Paul Kouwer Alan e. Rowan Theo Rasing Jialiang Xu School of Chemical and engineering Technology Tianjin University Tianjin 300350 China Institute for Molecules and Materials (IMM) Radboud University 6525 A J Nijrnegen The Netherlands Center for Photochemical Sciences Bowling Green State University Bowling Green OH 43403 USA Solvay Specialty Polymers Alpharetta CA 30005 USA Australian Institute for Bioengineering and Nanotechnology (AIBN) The University of Queensland Brisbane OLD 4072 Australia

Highly efficient nonlinear optical（NLO） materials with well-defined architectures in the wavelength and subwavelength length scales are of particular importance for next generation of integrated photonic circuits. Fluorenone analogues have been demonstrated to be promising candidates as building blocks for assembly of organic NLO materials thanks to their synergistic supramolecular interactions and brilliant optical properties. Here we have studied the polymorphs of a phenylethynyl functionalized fluorenone derivative, and their controlled self-assembly for microstructures with different morphologies. These polymorphic microcrystals exhibit very distinctive NLO properties, highly related to their supramolecular and electronic structures.

关键词： Nonlinear optics Second harmonic generation Two-photon excited fluorescence Transition dipole Fluorenone

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efficient Noninvasive FHB estimation using RGB Images from a Novel Multiyear,Multirater Dataset

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Plant Phenomics 2023年第3期5卷 533-545页

作者： DominikRößle LukasPrey LudwigRamgraber AnjaHanemann Danielcremers Patrick OleNoack TorstenSchön AImotion Bavaria Technische Hochschule IngolstadtIngolstadtGermany Hochschule Weihenstephan-Triesdorf WeidenbachGermany Saatzucht Josef Breun GmbH and Co.KG HerzogenaurachGermany Technical University of Munich MunichGermany

Fusarium head blight(FHB)is one of the most prevalent wheat diseases,causing substantial yield losses and health *** phenotyping of FHB is crucial for accelerating resistance breeding,but currently used methods are time-consuming and *** present article suggests a noninvasive classification model for FHB severity estimation using red–green–blue(RGB)images,without requiring extensive *** model accepts images taken from consumer-grade,low-cost RGB cameras and classifies the FHB severity into 6 ordinal *** addition,we introduce a novel dataset consisting of around 3,000 images from 3 different years(2020,2021,and 2022)and 2 FHB severity assessments per image from independent *** used a pretrained efficientNet(size b0),redesigned as a regression *** results demonstrate that the interrater reliability(Cohen’s kappa,κ)is substantially lower than the achieved individual network-to-rater results,e.g.,0.68 and 0.76 for the data captured in 2020,*** model shows a generalization effect when trained with data from multiple years and tested on data from an independent ***,using the images from 2020 and 2021 for training and 2022 for testing,we improved the F_(1)^(w) score by 0.14,the accuracy by 0.11,κ by 0.12,and reduced the root mean squared error by 0.5 compared to the best network trained only on a single year’s *** proposed lightweight model and methods could be deployed on mobile devices to automatically and objectively assess FHB severity with images from low-cost RGB *** source code and the dataset are available at https://***/cvims/FHB_classification.

关键词： network consuming breeding

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乙状结肠癌与慢性憩室病在CT结肠成像上的鉴别征象

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国际医学放射学杂志 2015年第3期 279-279页

作者： L.M.Lips P.T.cremers P.J.Pickhardt S.e.cremers M.L.JanssenHeijnen M.T.de Witte 陈璐民 Department of Radiology.Vie Curi Medical Centre Tegelseweg 210 5912 BL Venlothe Netherlands

目的对一大样本量病人回顾性分析CT结肠成像,确定鉴别肿块样慢性憩室病及乙状结肠癌的最可靠形态学表现。材料与方法本项回顾性研究经伦理委员会批准,免

关键词：结肠成像憩室乙状结肠征象 CT

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