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Bioinspired Passive Tactile Sensors Enabled by Reversible Polarization of Conjugated Polymers

Nano-Micro Letters 2025年第1期17卷 361-377页

作者： feng he Sitong Chen Ruili Zhou Hanyu Diao Yangyang Han Xiaodong Wu School of Mechanical Engineering Sichuan UniversityChengdu 610065People’s Republic of China School of Software Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065People’s Republic of China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065People’s Republic of China

Tactile perception plays a vital role for the human body and is also highly desired for smart prosthesis and advanced *** to active sensing devices,passive piezoelectric and triboelectric tactile sensors consume less power,but lack the capability to resolve static ***,we address this issue by utilizing the unique polarization chemistry of conjugated polymers for the first time and propose a new type of bioinspired,passive,and bio-friendly tactile sensors for resolving both static and dynamic ***,to emulate the polarization process of natural sensory cells,conjugated polymers(including poly(3,4-ethylenedioxythiophen e):poly(styrenesulfonate),polyaniline,or polypyrrole)are controllably polarized into two opposite states to create artificial potential *** controllable and reversible polarization process of the conjugated polymers is fully in situ ***,a micro-structured ionic electrolyte is employed to imitate the natural ion channels and to encode external touch stimulations into the variation in potential difference *** with the currently existing tactile sensing devices,the developed tactile sensors feature distinct characteristics including fully organic composition,high sensitivity(up to 773 mV N^(−1)),ultralow power consumption(nW),as well as superior *** demonstrations,both single point tactile perception(surface texture perception and material property perception)and two-dimensional tactile recognitions(shape or profile perception)with high accuracy are successfully realized using self-defined machine learning *** tactile sensing concept innovation based on the polarization chemistry of conjugated polymers opens up a new path to create robotic tactile sensors and prosthetic electronic skins.

关键词： Passive tactile sensors Reversible polarization of conjugated polymers Tactile perception Machine learning algorithm Object recognition

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跨越新生适应障碍:中国大学入学教育的运行机制及其成效

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华东师范大学学报（教育科学版） 2025年第1期43卷 49-66页

作者：鲍威何元皓何峰厦门大学高等教育发展中心厦门361005 厦门大学教育研究院厦门361005 北京大学教育经济研究所北京100871 北京大学未来教育管理研究中心北京100871 北京大学研究生院北京100871

入学教育是帮助新生适应大学环境、形成自我与社会认知、充分融入大学生活的重要桥梁。鉴于我国大学新生普遍存在学术性、社会性双重适应障碍,在通过国际比较清晰认识中国入学教育运行机制特征的基础上,利用全国大一学生调查数据,科学... 详细信息

入学教育是帮助新生适应大学环境、形成自我与社会认知、充分融入大学生活的重要桥梁。鉴于我国大学新生普遍存在学术性、社会性双重适应障碍,在通过国际比较清晰认识中国入学教育运行机制特征的基础上,利用全国大一学生调查数据,科学评估入学教育在缓减新生适应障碍中的干预成效。研究表明,采用长期深度教育形式,传递专业学科认知、学习方法习得、心理健康建设3大教育内容向度的入学教育运行机制,对缓减学生学术性、社会性双重适应障碍具有积极效用。囿于精准化帮扶举措欠缺,入学教育对弱势学生的补偿效应有待加强。结论为完善大学入学教育、保障人才培养质量提供科学启示。

关键词：入学教育大学新生学术性适应社会性适应

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Material and device design for organic solar cells: towards efficiency and stability

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Science China Chemistry 2023年第12期66卷 3484-3494页

作者： Mingrui Pu feng he Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and TechnologyShenzhen 518055China

Organic solar cells(OSCs) have garnered significant attention as a novel photovoltaic technology and have been extensively investigated. In recent years, OSCs have made rapid strides in power conversion efficiency(PCE), demonstrating their significant potential in practical applications. In addition to high PCE, the practical application of OSCs demands a prolonged operating lifespan. The rational design of materials and devices to achieve efficient and stable OSCs is pivotal. This feature article presents a thorough analysis of our group's studies on enhancing efficiency and stability through material and device design. We introduce a range of exceptional chlorine-mediated organic photovoltaic materials and systematically summarize chlorine atom(Cl) induced effects on energy levels, molecular stacking, active layer film morphology and photovoltaic performance. Furthermore, the use of single-crystal diffraction technology allows for a comprehensive understanding of intermolecular packing and interaction at the molecular level. A series of highly efficient non-fullerene acceptors(NFAs) with threedimensional(3D) network packing structures are developed and discussed. Subsequently, based on efficient 3D network brominated NFAs, the studies on polymer and oligomer acceptor materials are carried out and achieve efficient and stable *** addition to materials design, the development of the “quasiplanar heterojunction”(Q-PHJ) based OSC device also plays an important role in achieving superior efficiency and stability. These design experiences of materials and devices hope to provide valuable guidance for the development of efficient and stable OSCs.

关键词： chlorine-mediated photovoltaic materials single-crystal 3D network efficiency stability

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H-and J-aggregation of conjugated small molecules in organic solar cells

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Journal of Energy Chemistry 2024年第6期93卷 174-192,I0005页

作者： Qiaoqiao Zhao feng he State Key Laboratory of Biobased Material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353ShangdongChina Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and TechnologyShenzhen 518055GuangdongChina Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and TechnologyShenzhen 518055GuangdongChina

As H-and J-aggregation receive more and more attention in the research of organic solar cells(OSCs),especially in small molecular systems,deep understanding of aggregation behavior is needed to guide the design of conjugated small molecular structure and the fabrication process of OSC *** this end,this review is ***,the review firstly introduced the basic information about H-and J-aggregation of conjugated small molecules in ***,the characteristics of H-and J-aggregation and the methods to identify them were ***,it reviewed the research progress of H-and J-aggregation of conjugated small molecules in OSCs,including the factors influencing H-and J-aggregation in thin film and the effects of H-and J-aggregation on OPV performance.

关键词： H-aggregation J-aggregation Organic solar cells Small molecules Efficiency Stability

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Alkali Metal-incorporated Mesoporous Smectites:Crystallinity and Textural Properties

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Chemical Research in Chinese Universities 2003年第3期19卷 253-256页

作者： he Yan feng School of Chemical Engineering Changchun University of TechnologyChangchun 130012P.R.China Shinichiro Fujita Nobuhiro IwasaBhalchandra M.Bhanage and Masahiko Arai Division of Materials Science and EngineeringGraduate School of EngineeringHokkaido UniversitySapporo 0608628Japan

A series of mesoporous smectite like materials incorporated with alkali metals such as Li, Na, K and Cs has been synthesized with the hydrothermal method. The crystalline and the pore structures of the materials synthesized significantly change with the introduction of alkali metals. The addition of Li gives highly ordered layer phases, while the incorporation of Cs yields much less crystalline structures. Although Na or K has little effect on the crystalline structure, they modify the pore structure.

关键词： Mesoporous material Alkali metal Additive effect Crystalline structure Pore structure

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Deterministic bound for avionics switched networks according to networking features using network calculus

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Chinese Journal of Aeronautics 2017年第6期30卷 1941-1957页

作者： feng he Ershuai LI School of Electronic and Information Engineering Beihang University

The state of the art avionics system adopts switched networks for airborne communications. A major concern in the design of the networks is the end-to-end guarantee ability. Analytic methods have been developed to compute the worst-case delays according to the detailed configurations of flows and networks within avionics context, such as network calculus and trajectory approach. It still lacks a relevant method to make a rapid performance estimation according to some typically switched networking features, such as networking scale, bandwidth utilization and average flow rate. The goal of this paper is to establish a deterministic upper bound analysis method by using these networking features instead of the complete network configurations. Two deterministic upper bounds are proposed from network calculus perspective: one is for a basic estimation,and another just shows the benefits from grouping strategy. Besides, a mathematic expression for grouping ability is established based on the concept of network connecting degree, which illustrates the possibly minimal grouping benefit. For a fully connected network with 4 switches and 12 end systems, the grouping ability coming from grouping strategy is 15–20%, which just coincides with the statistical data(18–22%) from the actual grouping advantage. Compared with the complete network calculus analysis method for individual flows, the effectiveness of the two deterministic upper bounds is no less than 38% even with remarkably varied packet lengths. Finally, the paper illustrates the design process for an industrial Avionics Full Duple X switched Ethernet(AFDX) networking case according to the two deterministic upper bounds and shows that a better control for network connecting, when designing a switched network, can improve the worst-case delays dramatically.

关键词： Deterministic bound Grouping ability Network calculus Networking features Switched networks

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Type Synthesis for Bionic Quadruped Walking Robots

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Journal of Bionic Engineering 2015年第4期12卷 527-538页

作者： Jun he feng Gao State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai 200240 China

Regarding walking robots, biomimetic design has attracted a great deal of attention. Currently, studies have focused mainly on performance analysis and the design of some specific biomimetic walking robots. However, the systematic type synthesis of bionic quadruped robots has seldom been studied. In this paper, a new approach to type synthesis for quadruped walking robots is proposed based on the generalized fimction （Ge） set theory. The current types of typical walking robots are analyzed using the Ge set theory. The research status and existing problems are investigated. The skeletal systems of quadruped mammals are analyzed. The motion characteristics of all joints of quadruped mammals are denoted by 6;F sets. A process of conversion from biological types to serial, parallel and hybrid types is proposed. Limb types in serial, parallel and hybrid topology are synthe- sized. Finally the quadruped robots with serial, parallel and hybrid topology are produced. Two of these types have been suc- cessfully used for the design of walking rescue robots that is suitable for responding to nuclear accidents.

关键词： type synthesis bionic design quadruped robot parallel mechanism GF set

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Activity Origins of Graphdiyne Based Bifunctional Atom Catalysts for Hydrogen Evolution and Water Oxidation

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Chemical Research in Chinese Universities 2021年第6期37卷 1334-1340页

作者： WU Han he feng Key Laboratory of Organic Solids Institute of ChemistryChinese Academy of SciencesBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China

Graphdiyne(GDY)based atom catalysts(ACs)show extraordinary electrocatalytic activities towards hydrogen evolution reaction(heR)and water oxidation reaction(OER),which have attracted wide attention of ***,a precise understanding on the activities trends and origins of ACs is still under *** investigate the electrocatalytic performance of a series of ACs in this *** functional theory(DFT)calculations reveal that the half reactions of OER and heR are site-dependent on ACs,which are preferentially proceeded on the metal site and the nearby bonded carbon site,***,the d-band center of metal atoms is the most important descriptor,which can perfectly correlate the high activities of ACs towards the two half *** for heR,the deeper d-band position of metal atoms corresponds to much stronger d-p_(x)(p_(y))orbital coupling in ACs,which activate more obvious charge transfer between the metal site and the nearby bonded carbon site,resulting in the heR activity enhancement of *** results are of great significance in guiding the precise synthesis of highly efficient bifunctional metal atom catalysts supported by GDY in future.

关键词： Graphdiyne Atom catalyst Bifunction Activity origin Density functional theory

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Ternary strategy: An analogue as third component reduces the energy loss and improves the efficiency of polymer solar cells

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Journal of Energy Chemistry 2022年第7期31卷 67-73,I0003页

作者： Longzhu Liu Hanjian Lai feng he School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and TechnologyShenzhen 518055GuangdongChina Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and TechnologyShenzhen 518055GuangdongChina

Ternary strategy is a convenient and effective method to boost the performance of polymer solar cells(PSCs).Utilizing a ternary strategy to trade-off between the energy loss and the efficiency of devices however requires further ***,through the hydroxyl(-OH)and acetoxy(-OCOMe)substitution atβ-position of the IC terminal group,we developed two new synthetic acceptors,BTIC-OH-βand BTICOCOMe-β,which were designed to confine the morphology *** of an analogue as the third component provides a simple but efficient way to further balance the short current density(Jsc)and open-circuit voltage(Voc),leading to a champion efficiency based on PBDB-T:PBDB-TF:BTIC-OCOMe-β,effectively as high as 12.45%.The results were examined mainly in terms of the morphology characterization,electroluminescence external quantum efficiency(EQEEL),steady-state photoluminescence(PL)and transient *** suggested fine-tuning of the morphology by ratio modulation,reduction of the energy loss,construction of a promising pathway for charge transfer in the ternary system and enhancing the carrier *** this way,a ternary strategy with an analogue donor could provide more routes to higher-quality solar cells.

关键词： Polymer solar cell Ternary strategy Energy loss Trade-off

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Hybrid partition-and network-level scheduling design for distributed integrated modular avionics systems

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Chinese Journal of Aeronautics 2020年第1期33卷 308-323页

作者： Xuan ZHOU Huagang XIONG feng he School of Electronic and Information Engineering Beihang UniversityBeijing 100191China

Distributed Integrated Modular Avionics(DIMA)develops from Integrated Modular Avionics(IMA)and realizes distributed integration of multiple sub-function *** network provides effective support for time synchronization and information coordination in DIMA ***,inconsistency between processing resources and communication network destroys the time determinism benefiting from partitions and time-triggered *** ensure such time determinism and achieve guaranteed real-time performance,system design should collectively provide a global communication scheme for messages in network domain and a corresponding execution scheme for partitions in processing *** paper firstly establishes a general DIMA model which coordinates partitioned processing and time-triggered communication,and then proposes a hybrid scheduling algorithm using Mixed Integer Programming to produce feasible system ***,incrementally integrating new functions causes upgrades or reconfigurations of DIMA systems and will generate integration *** control such cost,this paper further develops an optimization algorithm based on Maximum Satisfiability Problem and guarantees that the scheduling design for upgraded DIMA systems inherit their original schemes as much as ***,two typical cases,including a simple fully connected DIMA system case and an industrial DIMA system case,are constructed to illustrate our DIMA model and validate the effectiveness of our hybrid scheduling algorithms.

关键词： Distributed integrated modular avionics End-to-end delay Incremental integration cost Maximum satisfiability problem Mixed integer programming Scheduling algorithms

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