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Chinese Journal of Chemistry 2022年第17期40卷 2118-2134页

作者： Yanyu Yang Decheng Wu College of Materials Science and Engineering Zhengzhou UniversityZhengzhouHenan450001 China Department of Biomedical Engineering Southern University of Science and TechnologyShenzhenGuangdong518055 China

In spite of biological tissue-like peculiarity,multifarious functionalities and great application prospect,the low mechanics and soften behavior of hydrogels still retain a problem to be addressed for repetitive weight-bearing fields of flexible electronics,actuators,substitutions of soft tissues,wound dressing,wearable or implantable devices.Due to the distinct combination of diversity,reversibility and impressive disruption-reconstruction capacity,the chitosan physical cross-links can server as recoverable“sacrificial bonds”to construct multifarious energy-dissipative and anti-soften hydrogels and further broaden their diversified applications.In this review,we summarized the gelation mechanisms of chitosan physical networks and highlighted the chitosan physical network based hydrogels in rational design,construction principle,and structure and performance regulation.The recent progress in functional hydrogels for flexible electronics and biomaterials was systematically discussed.Overall,the review will provide comprehensive guidelines on the design principle,performance modulation and functionality construction of energy-dissipative and soften resistant hydrogels.

关键词： Gels Physicalcross-Links Mechanical properties Functionality Sensors

Low infrared emitter from Ti3C2Tx MXene towards highly-efficient electric/solar and passive radiative heating

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Journal of Materials Science & Technology 2023年第2期133卷 32-40页

作者： Mingming Shen Jiahao Ni Yanxia Cao Yanyu Yang Wanjie Wang Jianfeng Wang College of Materials Science and Engineering Henan Key Laboratory of Advanced Nylon Materials and ApplicationZhengzhou UniversityZhengzhou 450001China

Realizing all-day and all-weather energy-saving heating is crucial for mitigating the global energy and ecology crisis.Electric/solar heating are two promising heating approaches,yet materials with high elec-trical conductivity,high solar absorptivity,and low infrared emissivity at the same time are rare in na-ture,which are highly anticipated and of great significance for highly efficient electric/solar heating.In this work,we demonstrate that Ti_(3)C_(2)T_(x) MXene with low IR emissivity(14.5%)fills the gap in the absence of the above materials,exhibiting a remarkable electric/solar heating performance.The saturated heating temperature of Ti_(3)C_(2)T_(x) film reaches a record-high value of 201°C at a low driving voltage of 1.5 V,and reaches 84.3°C under practical solar irradiation(750 W/m^(2))with a high solar to the thermal conversion efficiency of 75.3%,which is far superior to other reported materials.Meanwhile,the low IR emissivity endows Ti_(3)C_(2)T_(x) with a remarkable passive radiative heating capability of 7.0°C,ensuring zero-energy heating without electric/solar energy supply.The intrinsic characteristic of high electrical conductivity,high solar absorptivity,and low IR emissivity makes Ti_(3)C_(2)T_(x) unique existence in nature,which is highly promising for all-day and all-weather energy-saving heating.

关键词： Ti3C2Tx MXene Low infrared emitter Thermal radiation emission Electric/solar heating Passive radiative heating

Existence and practice of gaming:thoughts on the development ofmulti-agent system gaming

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Frontiers of Information Technology & Electronic Engineering 2022年第7期23卷 995-1001页

作者： Qi DONG Zhenyu WU Jun LU Fengsong SUN Jinyu WANG Yanyu Yang Xiaozhou SHANG China Academy of Electronics and Information Technology Beijing 100049China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China School of Information and Communication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China

Game is a universal being in the universe.Starting with human understanding of the game process,we discuss the existence and practice of gaming,expound challenges in multi-agent gaming,and put forward a theoretical framework for a multiagent evolutionary game based on the idea of evolution and system theory.Taking the next-generation early warning and detection system as an example,we introduce the applications of multi-agent evolutionary game.We construct a multi-agent selforganizing game decision-making model and develop a multi-agent method based on reinforcement learning,which are significant in studying organized and systematic game behaviors in a high-dimensional complex environment.

关键词： agent theory system

Visible transparent,infrared stealthy polymeric films with nanocoating of ITO@MXene enable efficient passive radiative heating and solar/electric thermal conversion

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Nano Research 2023年第2期16卷 3326-3332页

作者： Xingyuan Du Xiangxin Li Yuxuan Zhang Xinyi Guo Zhengji Li Yanxia Cao Yanyu Yang Wanjie Wang Jianfeng Wang College of Materials Science and Engineering Henan Key Laboratory of Advanced Nylon Materials and ApplicationZhengzhou UniversityZhengzhou 450001China China Construction Seventh Engineering Division Corp.Ltd. Zhengzhou 450004China

Visible transparent yet low infrared-emissivity(ε)polymeric materials are highly anticipated in many applications,whereas the fabrication of which remains a formidable challenge.Herein,visible transparent,flexible,and low-εpolymeric films were fabricated by nanocoating decoration of indium tin oxide(ITO)and MXene on polyethylene terephthalate(PET)film surface through magnetron sputtering and spray coating,respectively.The obtained PET-ITO@MXene(PET-IM)film exhibits lowεof 24.7%and high visible transmittance exceeding 50%,endowing it with excellent visible transparent infrared stealthy by reducing human skin radiation temperature from 32 to 20.8°C,and remarkable zero-energy passive radiative heating capability(5.7°C).Meanwhile,the transparent low-εPET-IM film has high solar absorptivity and electrical conductivity,enabling superior solar/electric to thermal conversion performance.Notably,the three heating modes of passive radiative and active solar/electric can be integrated together to cope with complex heating scenarios.These visible transparent low-εpolymeric films are highly promising in infrared stealth,building daylighting and thermal management,and personal precision heating.

关键词： transparent polymeric film nanocoating decoration ITO@MXene low infrared emissivity passive radiative heating solar/electric heating

A Robust Strategy for Precise Fabrication of Rigid-Flexible Coupling Dendrimers toward Self-Coordinated Hierarchical Assembly

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CCS Chemistry 2021年第4期3卷 1093-1104页

作者： Xing Wang Peiyuan Gao Juan Wang Yanyu Yang Yezi You Decheng Wu Beijing National Laboratory for Molecular Sciences Institute of ChemistryChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001 Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Soft Matter ChemistryDepartment of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026

Advances in nanotechnology depend upon expanding the ability to create biologically inspired complex materials with well-defined multidimensional structures.Fabrication of hybrid hierarchical structures by combining colloidal organic and inorganic building blocks remains a challenge due to the difficulty in preparing a diverse spectrum of rigid-flexible coupling units of precise shape and size.Herewe reportageneral strategy for crafting amyriad of uniform aggregates via manipulating self-assembly of distinct dendimers with precisely controlled polyhed raloligomeric silse squioxane(POSS)-embedded cores integrating stiffness and ductility.The rigidity of POSS units exerts steric effects onself-amplification of hydrophobic do mains while the flexibility from internally ductile linkages provides ideal scenarios in establishing self-adaptive structural optimization,which subsequently drive the assemblies to proceed into hierarchical self-assembly via multiple coordination effects,generating highly complex multi compartment micelles(MCMs)without any preprocessing.Our facile approach enables a robust modular nanofabrication of well-organized dendrimers toward artificial functional systems with defined geometric architectures and intriguing functions for advanced biological applications.

关键词： dendrimer POSS hierarchical selfassembly rigid-flexible coupling phase separation coordinative interaction

POSS-embedded supramolecular hyperbranched polymers constructed from a 1→7 branching monomer with controllable morphology transitions

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Science China Chemistry 2018年第3期61卷 311-318页

作者： Xing Wang Yanyu Yang Linfeng Fan Fei yang Decheng Wu Beijing National Laboratory for Molecular Sciences State Key Laboratory of Polymer Physics & Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China College of Materials Science and Engineering Zhengzhou University Zhengzhou 450052 China University of Chinese Academy of Sciences Beijing 100049 China

The research on the supramolecular hyperbranched polymers(SHPs) that combines the advantages of supramolecular polymer and hyperbranched architecture has attracted considerable interests in many applications. Here we demonstrate a simple approach to prepare POSS-embedded supramolecular hyperbranched polymers(POSS-SHPs) with varied morphology and size by controlling monomer concentration and mixed solvents. The SHPs formations can further transfer into the core-shell structured micelles by addition of competitive guests based on the double supramolecular driving forces.

关键词： POSS 超分子聚合物形态学单体控制嵌入分叉

互文、隐喻与现实主义:“荒岛文学”的跨媒介银幕叙事研究

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电影评介 2022年第2期 84-88页

作者：杨炎雨广东警官学院基础课教研部

荒岛文学是西方特有的一种文学形式,由于地理位置临海且具有冒险精神,荒岛成为天生爱探险的西方人向往且充满好奇的地带。这种刺激与不可知的荒岛经历让荒岛文学获得了生存的土壤,并受到推崇与喜爱;而由荒岛文学改编而来的电影不仅是从... 详细信息

荒岛文学是西方特有的一种文学形式,由于地理位置临海且具有冒险精神,荒岛成为天生爱探险的西方人向往且充满好奇的地带。这种刺激与不可知的荒岛经历让荒岛文学获得了生存的土壤,并受到推崇与喜爱;而由荒岛文学改编而来的电影不仅是从叙事上与荒岛文学产生了互文性,更是从文本文化(Text culture)到形象文化(Image culture)展现着富有层次的叙事表达,让西方荒岛文学获得了新的更富生命力的升华。

关键词：荒岛文学跨媒介叙事研究冒险精神互文性叙事表达现实主义文本文化

Channel Capacity and Power Allocation of MIMO Visible Light Communication System

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China Communications 2023年第2期20卷 122-138页

作者： Shuai Ma Ruixin yang Guanjie Zhang Hang Li Wen Cao Linqiong Jia yanyu Zhang Shiyin Li Peng Cheng Laboratory Shenzhen 518055China School of Information and Control Engineering China University of Mining and TechnologyXuzhou 221116China Shenzhen Research Institute of Big Data Shenzhen 518172China School of Electronics and Control Engineering Chang’an UniversityXi’an 710064China School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNanjing 210094China National Digital Switching System Engineering&Technological Research Center Zhengzhou 450000China

In this paper,the channel capacity of the multiple-input multiple-output(MIMO)visible light communication(VLC)system is investigated under the peak,average optical and electrical power constraints.Finding the channel capacity of MIMO VLC is shown to be a mixed integer programming problem.To address this open problem,we propose an inexact gradient projection method to find the channel capacity-achieving discrete input distribution and the channel capacity of MIMO VLC.Also we derive both upper and lower bounds of the capacity of MIMO VLC with the closed-form expressions.Furthermore,by considering practical discrete constellation inputs,we develop the optimal power allocation scheme to maximize transmission rate of MIMO VLC system.Simulation results show that more discrete points are needed to achieve the channel capacity as SNR increases.Both the upper and lower bounds of channel capacity are tight at low SNR region.In addition,comparing the equal power allocation,the proposed power allocation scheme can significantly increase the rate for the low-order modulation inputs.

关键词： visible light communication MIMO discrete constellation inputs power allocation

Treated dentin matrix induces odontogenic differentiation of dental pulp stem cells via regulation of Wnt/β-catenin signaling

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Bioactive Materials 2022年第1期7卷 85-97页

作者： Sirui Liu Jingjing Sun Shuai Yuan Yanyu Yang Yuping Gong Ying Wang Runying Guo Xue Zhang Yiming Liu Hongyan Mi Meiyue Wang Mengzhe Liu Rui Li Department of Stomatology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouChina Academy of Medical Sciences at Zhengzhou University ZhengzhouChina College of Materials Science and Engineering Zhengzhou University ZhengzhouHenan 450001China

Treated dentin matrix(TDM)is an ideal scaffold material containing multiple extracellular matrix factors.The canonical Wnt signaling pathway is necessary for tooth regeneration.Thus,this study investigated whether the TDM can promote the odontogenic differentiation of human dental pulp stem cells(hDPSCs)and determined the potential role of Wnt/β-catenin signaling in this process.Different concentrations of TDM promoted the dental differentiation of the hDPSCs and meanwhile,the expression of GSK3βwas decreased.Of note,the expression of the Wnt/β-catenin pathway-related genes changed significantly in the context of TDM induction,as per RNA sequencing(RNA seq)data.In addition,the experiment showed that new dentin was visible in rat mandible cultured with TDM,and the thickness was significantly thicker than that of the control group.In addition,immunohistochemical staining showed lower GSK3βexpression in new dentin.Consistently,the GSK3βknockdown hDPSCs performed enhanced odotogenesis compared with the control groups.However,GSK3βoverexpressing could decrease odotogenesis of TDM-induced hDPSCs.These results were confirmed in immunodeficient mice and Wistar rats.These suggest that TDM promotes odontogenic differentiation of hDPSCs by directly targeting GSK3βand activating the canonical Wnt/β-catenin signaling pathway and provide a theoretical basis for tooth regeneration engineering.

关键词： Dental pulp stem cells Treated dentin matrix GSK3β Odontogenic differentiation Wnt/β-catenin signaling pathway

Halftone spatial frequency domain imaging enables kilohertz high-speed label-free non-contact quantitative mapping of optical properties for strongly turbid media

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Light(Science & Applications) 2021年第12期10卷 2518-2530页

作者： yanyu Zhao Bowen Song Ming Wang yang Zhao Yubo Fan Beijing Advanced Innovation Center for Biomedical Engineering Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Engineering Medicineand with the School of Biological Science and Medical EngineeringBeihang University100191 BeijingChina Institute of Spacecraft Application System Engineering China Academy of Space Technology100094 BeijingChina Beijing Institute of Spacecraft Engineering 100094 BeijingChina

The ability to quantify optical properties(i.e.,absorption and scattering)of strongly turbid media has major implications on the characterization of biological tissues,fluid fields,and many others.However,there are few methods that can provide wide-field quantification of optical properties,and none is able to perform quantitative optical property imaging with high-speed(e.g.,kilohertz)capabilities.Here we develop a new imaging modality termed halftone spatial frequency domain imaging(halftone-SFDI),which is approximately two orders of magnitude faster than the state-of-the-art,and provides kilohertz high-speed,label-free,non-contact,wide-field quantification for the optical properties of strongly turbid media.This method utilizes halftone binary patterned illumination to target the spatial frequency response of turbid media,which is then mapped to optical properties using model-based analysis.We validate the halftone-SFDI on an array of phantoms with a wide range of optical properties as well as in vivo human tissue.We demonstrate with an in vivo rat brain cortex imaging study,and show that halftone-SFDI can longitudinally monitor the absolute concentration as well as spatial distribution of functional chromophores in tissue.We also show that halftone-SFDI can spatially map dual-wavelength optical properties of a highly dynamic flow field at kilohertz speed.Together,these results highlight the potential of halftone-SFDI to enable new capabilities in fundamental research and translational studies including brain science and fluid dynamics.

关键词： optical scattering media