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Programmable photo-responsive self-healing hydrogels for optical information coding and encryption

EUROPEAN POLYMER JOURNAL 2022年 166卷 111025-111025页

作者： Wang, Yufei Chen, Zihao Li, Nanshu Zhang, Hanbing Wei, Jie Beijing Engn Res Ctr Synth & Applicat Waterborne Beijing 100029 Peoples R China Key Lab Carbon Fibers & Funct Polymers Minist Educ Beijing 100029 Peoples R China Beijing Univ Chem Technol Coll Mat Sci & Engn Beijing 100029 Peoples R China

In this study, we proposed programmable photo-responsive self-healing hydrogels containing polyacrylamide (PAM), polyacrylic acid (PAA), poly[2-(dimethylamino) ethyl methacrylate] (PDMAEMA), ammonium molybdate (Mo7), and 7-2(acryloyl hydroxypropyl)-4-methyl-coumarin (AHPMC). Because of the electrostatic interaction of PAA and PDMAEMA, the hydrogel demonstrates good self-healing properties. Moreover, we introduced Mo7 and coumarin derivative in the hydrogel, respectively, which endows the hydrogel photo-responsive properties. Under the control of UV light, PAM-AD/Mo7 hydrogel with photochromic behavior could turn atrovirens, and PAM-AD/AC hydrogel with photoluminescent properties could emit blue fluorescence. In contrast, PAM-AD hydrogel possesses no photo-responsive behavior. Based on the self-healing and photoresponsive properties of the hydrogels, the three hydrogel blocks could be programmed and healed as a whole combination. In addition, we demonstrated the application of the hydrogel in optical information coding and encryption, which possesses good information coding and encryption effect. Therefore, the photo-responsive selfhealing hydrogel may have potential applications in flexible information display and encryption fields.

关键词： Hydrogel Self-healing Photo -response Fluorescence information coding Encryption

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Ultraviolet-magnetic response multicolored janus colloidal photonic crystal beads for information coding

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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 2022年 652卷

作者： Li, Nanshu Chen, Zihao Wang, Yufei Chen, Yiping Yang, Shuangye Hu, Jiashuo Wei, Jie Minist Educ Key Lab Carbon Fibers & Funct Polymers Beijing 100029 Peoples R China Beijing Engn Res Ctr Synth & Applicat Waterborne P Beijing 100029 Peoples R China Beijing Univ Chem Technol Coll Mat Sci & Engn Beijing 100029 Peoples R China

We report a new kind of ultraviolet (UV)-magnetic response Janus colloidal photonic crystal (CPC) beads for information coding. The Janus beads made up of fluorescent CPCs and Fe3O4 nanoparticles show different colors under visible light, UV light and magnetic stimulation. In the concrete scheme, monodisperse colloidal particles with and without fluorescent molecule SPMA were prepared by semi-continuous emulsion polymerization. Then colloidal particles and Fe3O4 nanoparticles were paired as precursors to prepare Janus beads by the droplet template method. During the slow self-assembly process, Fe3O4 nanoparticles were deposited on the bottom and colloidal particles filled the other parts of the beads so that a Janus structure formed. Therefore, the upper surface of Janus beads appears structural color and the lower surface appears black. The variation of Fe content in different hemispheres allows the controllable magnetic response to reverse the beads. The presence of fluorescent molecule SPMA makes fluorescent Janus beads (FJBs) emit fluorescence under UV light. According to design, an array in a particular arrangement of Janus beads can realize reversible changes between three different optical information. Furthermore, the binary cipher was combined with Janus beads to design and fabricate an optical encoding array, revealing an important application in information coding.

关键词： Colloidal photonic crystals Janus bead Structural color Magnetic response Ultraviolet fluorescence information coding

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A novel mode of neural information coding:Conductive coding

A novel mode of neural information coding:Conductive coding

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中国神经科学学会第四次会员代表大会暨第七届全国学术会议

作者： Zhi-Ru ZHU~(1,2),Xiao-Wei TANG~2,San-Jue HU~1 1 Institute of Neuroscience,the Fourth Military Medical University,Xi'an 710032 2 Center of Neural information Research Zhejiang University,Hangzhou 310027

The never fiber has been defined as a long neuronal process,which works as a relatively sample relay line between neurons,insuring the conduction of information from the cell body to the nerve *** large numbers of fibers,ramifications and synapses,neurons are not only connected with each other but also with their receptors,thus constituting a complex neural signal processing *** evidence for that pattern of interspike interval(ISI) series contains information is gaining attention as a new theoretical and experimental *** phenomena suggest that the pattern of ISI series is not always conducted faithfully along the *** the function of nerve fibers,especially non-myelinated fibers(C-fibers),need to *** present study is to be done with single C-fiber recording techniques in rabbits' saphenous *** main results are as following:(1) During continuous or train stimulations, various type of ISI patterns exhibit on the C-fibers.(2) Before the appearance of conductive failure,ISI series fluctuate obviously on the base of conduction velocity slowing.(3) The degree of variances of ISI series has close relationship with distance action potentials passed,indicating that the variances of ISI series accomplished on the course of propagating along nerve fiber.(4) hyperpolarization activated cation current(Ih) and 4-aminopyridine sensitive outward current(I4- AP) can modulate the patterns of ISI series.(5) The H-H neuron model was adopted to simulate the experimental results. These results suggest that a novel mode of neural information coding,our term for it is "conductive coding",appears in ISI series propagating along C-fibers.

关键词： information coding neural fibers firing patterns conduction

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A novel mode of neural information coding:Conductive coding

A novel mode of neural information coding:Conductive coding

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中国神经科学学会第四次会员代表大会暨第七届全国学术会议(The 7th Biennial Meeting and the 5th Congress of the Chinese Society for Neuroscience)

作者： Zhi-Ru ZHU Xiao-Wei TANG San-Jue HU Institute of Neuroscience the Fourth Military Medical University Xi'an 710032 Center of Neural I Center of Neural Information Research Zhejiang University Hangzhou 310027 Institute of Neuroscience the Fourth Military Medical University Xi'an 710032

关键词： information coding neural fibers firing patterns conduction

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Ergonomics study of information coding of cockpit display under certain ambient illumination

Ergonomics study of information coding of cockpit display un...

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International Conference on BioMedical Engineering and Informatics (BMEI)

作者： Wu Xu Wanyan Xiaoru Zhuang Damin Zhou Yingwei School of Aeronautic Science and Engineering Beijing University of Aeronautics and Astronautics Beijing China

ISBN: (纸本)9781467311830

Aiming at the effects of visual coding on information identification under ambient illumination in aircraft cockpit, a simulation model of flight information display interface was developed for ergonomics experiment. 32 subjects participated in the character-search tasks in the experiment. Correct rate and reaction time were used as evaluation indexes to analyze visual performance. ANOVA and bilinear regression were used to determine the critical sizes of different character types under various ambient illumination levels. The results of this experiment are: the order of visual performance of character types: symbols > numbers > Chinese/English; the ambient illumination has certain effects on identification performance; supplement and correction of the classic equation are put forwards to fit the need of current visual display terminal.

关键词： character type ambient illumination critical size information coding interface design

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Quality Control of Mass-Encoded Nanodevices by Compartmented DNA Origami Frames for Precision information coding and Logic Mapping

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Angewandte Chemie 2023年第4期136卷

作者： Xue Zhang Dr. Yuxiang Dong Yong Wang Zhenzhen Zhang Dr. Xuemeng Zhang Prof. Jun-Jie Zhu Prof. Ye Tian Prof. Qianhao Min State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering College of Engineering and Applied Sciences Chemistry and Biomedicine Innovation Center Nanjing University Nanjing 210023 P. R. China School of Materials Science and Engineering Suzhou University of Science and Technology Suzhou 215009 P. R. China

Encoded nanostructures afford an ideal platform carrying multi-channel signal components for multiplexed assay and information security. However, with the demand on exclusivity and reproducibility of coding signals, precise control on the structure and composition of nanomaterials featuring fully distinguishable signals remains challenging. By using the multiplexing capability of mass spectrometry (MS) and spatial addressability of DNA origami nanostructures, we herein propose a quality control methodology for constructing mass-encoded nanodevices (namely MNTs-TDOFs) in the scaffold of compartmented tetrahedral DNA origami frames (TDOFs), in which the arrangement and stoichiometry of four types of mass nanotags (MNTs) can be finely regulated and customized to generate characteristic MS patterns. The programmability of combinatorial MNTs and orthogonality of individual compartments allows further evolution of MNTs-TDOFs to static tagging agents and dynamic nanoprobes for labeling and sensing of multiple targets. More importantly, structure control at single TDOF level ensures the constancy of prescribed MS outputs, by which a high-capacity coding system was established for secure information encryption and decryption. In addition to the multiplexed outputs in parallel, the nanodevices could also map logic circuits with interconnected complexity and logic events of c-Met recognition and dimerization on cell surface for signaling regulation by MS interrogation.

关键词： DNA Structures information coding Logic Events Mass Spectrometry Multiplexed Output

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A new approach to detect the coding rule of the cortical spiking model in the information transmission

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NEURAL NETWORKS 2018年 99卷 68-78页

作者： Nazari, Soheila Faez, Karim Janahmadi, Mahyar Amirkabir Univ Technol Dept Elect Engn Tehran Iran Shahid Beheshti Univ Med Sci Med Sch Neurosci Res Ctr Tehran Iran Shahid Beheshti Univ Med Sci Med Sch Dept Physiol Tehran Iran

Investigation of the role of the local field potential (LFP) fluctuations in encoding the received sensory information by the nervous system remains largely unknown. On the other hand, transmission of these translation rules in information transmission between the structure of sensory stimuli and the cortical oscillations to the bio-inspired artificial neural networks operating at the efficiency of the nervous system is still a vague puzzle. In order to move towards this important goal, computational neuroscience tools can be useful so, we simulated a large-scale network of excitatory and inhibitory spiking neurons with synaptic connections consisting of AMPA and GABA currents as a model of cortical populations. Spiking network was equipped with spike-based unsupervised weight optimization based on the dynamical behavior of the excitatory (AMPA) and inhibitory (GABA) synapses using Spike Timing Dependent Plasticity (STDP) on the MNIST benchmark and we specified how the generated LFP by the network contained information about input patterns. The main result of this article is that the calculated coefficients of Prolate spheroidal wave functions (PSWF) from the input pattern with mean square error (MSE) criterion and power spectrum of LFP with maximum correntropy criterion (MCC) are equal. The more important result is that 82.3% of PSWF coefficients are the same as the connecting weights of the cortical neurons to the classifying neurons after the completion of the training process. Higher compliance percentage of coefficients with synaptic weights (82.3%) gives the expectance us that this coding rule will be able to extend to biological systems. Eventually, we introduced the cortical spiking network as an information channel, which transmits the information of the input pattern in the form of PSWF coefficients to the power spectrum of the output generated LFP. (c) 2017 Elsevier Ltd. All rights reserved.

关键词： Cortical spiking network AMPA and GABA current PSWF Power spectrum of LFP information coding

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Stability and variability of place cell activity during behavior: Functional implications for dynamic coding of spatial information

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JOURNAL OF PHYSIOLOGY-PARIS 2012年第3-4期106卷 62-71页

作者： Poucet, B. Hok, V. Sargolini, F. Save, E. Univ Provence CNRS Lab Neurobiol & Cognit F-13331 Marseille 03 France

In addition to their discharge strongly related to a rat's location in the environment, hippocampal place cells have recently been discovered to carry other more subtle signals. For instance, place cells exhibit overdispersion, i.e., a tendency to have highly variable firing rates across successive passes in the firing field, which may reflect the processing of different classes of cues. In addition, the place cell population tends to fire synchronously during specific phases of place navigation, presumably signaling the animal's arrival at the goal location, or to be reactivated during either sleep or wakefulness following exposure to a new environment, a process thought to be important for memory consolidation. Although these various phenomena are expressed at different timescales, it is very likely that they can occur at the same time during an animal's exposure to a spatial environment. The advantage of such simultaneous processing is that it permits the organism both to be aware of its own location in the environment, and to attend to other environmental features and to store multiple experiences. However its pitfall is that it may result in noisy signals that are difficult to decipher by output structures. Therefore the question is asked of how the information carried by each process can be disentangled. We provide some examples from recent research work showing that this problem is far from being trivial and we propose an explanatory framework in which place cell activity at different timescales could be viewed as a series of dynamic attractors nested within each other. (C) 2011 Elsevier Ltd. All rights reserved.

关键词： Hippocampus Unit recordings Place cells Spatial navigation information coding Rat

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Research on Building the Standard system of Modern Agriculture information Resources Classification and coding

Research on Building the Standard system of Modern Agricultu...

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International Conference on Sustainable Energy and Environmental Engineering (ICSEEE 2012)

作者： Zhou, Qing Lai, Lu-yan Gu, Fa-hui JiangXi Vocat Coll Appl Technol Dept Informat Engn Ganzhou 341000 Peoples R China JiangXi Environm Engn Vocat Coll Sch Business Ganzhou 341000 Peoples R China South China Agr Univ Sch Informat Guangzhou 510642 Guangdong Peoples R China

ISBN: (纸本)9783037856345

A standard system of information classification and coding covering the entire modem agriculture funding chain, logistics chain and chain is proposed, which includes a unified standard system framework of modern agriculture information classification and code, the agricultural information classification and coding object decomposition table and the agricultural information code structural model based on unified messaging organization, it provides the idea to establish unified modem agriculture information codes.

关键词： Modern Agriculture information Classification information coding Standard System of information Classification and coding coding Structure Model

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Research on analyzing and coding technology of manufacturing information resource based on granularity-structure

Research on analyzing and coding technology of manufacturing...

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12th International Manufacturing Conference in China

作者： Jiang, Jianjun Wang, Junbiao Jiang, Chengyu Northwestern Polytech Univ Xian 710072 Peoples R China

ISBN: (纸本)9780878494217

This paper constructs the organization model of manufacture information resource (MIR) using the granularity structure (GS) analysis method. Based on the model, the expression technique of MIR based on metadata and the coding realization technique are analyzed. MIR expression mode achieves flexibility unification using the object-oriented (O-O) coding structure solution. The result proves that the technique of analyzing and coding to MIR based on GS has provided an effective method to standardize the MIR organization under the development mode of product life cycle (PLC).

关键词： granularity structure manufacture information resource metadata information coding

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