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An oxide-based heterojunction optoelectronic synaptic device with wideband and rapid response performance

Journal of Materials Science & Technology 2022年第28期123卷 159-167页

作者： Chunmei Li Jinyong Wang Dongyang Li Nasir Ilyas Zhiqiang Yang Kexin Chen Peng Gu Xiangdong Jiang Deen Gu Fucai Liu Yadong Jiang Wei Li School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 611731China Key Laboratory of Information Materials of Sichuan Province and School of Preparatory Education Southwest Minzu UniversityChengdu 610041China

With the rapid development of science and technology,the emergence of new application scenarios,such as robots,driverless vehicles and smart city,puts forward high requirements for artificial visual *** synaptic devices have attracted much attention due to their advantages in sensing,memory and computing *** this work,via band structure engineering and heterostructure designing,a heterojunction optoelectronic synaptic device based on Cu doped with n-type SrTiO_(3)(Cu:STO)film combined with p-type CuAlO_(2)(CAO)thin film was *** is found surprisingly that the optoelectronic device based on Cu:STO/CAO p-n heterojunction exhibits a rapid response of 2 ms,and that it has a wideband response from visible to near-infrared(NIR)***,a series of important synaptic functions,including excitatory postsynaptic current(EPSC),paired-pulse facilitation(PPF),shortterm potentiation(STP)to long-term potentiation(LTP)transition,learning experience behavior and image sharpening,have been successfully simulated on the *** importantly,the performance of the device remains still stable and reliable after several months which were stored at room temperature and atmospheric *** on these advantages,the optoelectronic synaptic devices demonstrated here provide great potential in the new generation of artificial visual systems.

关键词： Cu:STO/CAO heterojunction Optoelectronic synaptic devices Vis to NIR wideband rapid response Artificial visual system

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Prioritizing Indicators for rapid response in Global Health Security:A Bayesian Network Approach

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International Journal of Disaster Risk Science 2024年第4期15卷 536-551页

作者： Abroon Qazi Mecit Can Emre Simsekler M.K.S.Al‑Mhdawi School of Business Administration American University of SharjahSharjah 26666UAE Department of Management Science and Engineering Khalifa University of Science&TechnologyAbu Dhabi 127788UAE School of Computing Engineering&Digital TechnologiesTeesside UniversityMiddlesbrough TS13BXUK

This study explored a Bayesian belief networks(BBNs)approach,developing two distinct models for prioritizing the seven indicators related to the“rapid response to and mitigation of the spread of an epidemic”category within the context of both the specifc category and the Global Health Security Index(GHS index).Utilizing data from the 2021 GHS index,the methodology involves rigorous preprocessing,the application of the augmented naive Bayes algorithm for structural learning,and k-fold *** fndings show unique perspectives in both BBN *** the mutual value of information analysis,“linking public health and security authorities”emerged as the key predictor for the“rapid response to and mitigation of the spread of an epidemic”category,while“emergency preparedness and response planning”assumed precedence for the GHS *** analysis highlighted the critical role of“emergency preparedness and response planning”and“linking public health and security authorities”in extreme performance states,with“access to communications infrastructure”and“trade and travel restrictions”exhibiting varied *** BBN models exhibit high predictive accuracy,achieving 83.3%and 82.3%accuracy for extreme states in“rapid response to and mitigation of the spread of an epidemic”and the GHS index,*** study contributes to the literature on GHS by modeling the dependencies among various indicators of the rapid response dimension of the GHS index and highlighting their relative importance based on the mutual value of information and sensitivity analyses.

关键词： Bayesian belief networks Global health security Indicators Mitigation Policy implications rapid response

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Thermosensitive Poly(N-isopropylacrylamide-co-acrylonitrile) Hydrogels with rapid response

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Chinese Journal of Chemical Engineering 2006年第1期14卷 87-92页

作者：黄健黄志明包永忠翁志学 State Key Laboratory of Polymer Reaction Engineering Zhejiang University Hangzhou 310027 China

Acrylonitrile (AN) was copolymerized with N-isopropylacrylamide (NIPA) to synthesize thermosensitive hy-drogels, and the on-off switch behavior of poly(NIPA-co-AN) hydrogels with different fraction of hydrophobic compo-nent (AN) was investigated. It is found that the lower critical solution temperature (LCST), the swelling ratio at certain temperature and the reswelling rate of poly(NIPA-co-AN) hydrogels decreased as AN unit fraction in copolymers in-creased. In order to improve the responsive rate of poly(NIPA-co-AN) hydrogels, they were further treated by surface crosslinking using N, N′-methylene bisacrylamide (BIS) as a crosslinking agent. The swelling and deswelling behaviors of these copolymers were compared with those of the untreated hydrogels. The results indicated that the responsive rate of poly(NIPA-co-AN) hydrogel was improved by surface crosslinking. The resulting hydrogels bearing cyano groups with fast response have potential applications in the field of drug-controlled release and immobilization of biomolecules.

关键词： polymerization hydrogel rapid response

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A rapid-response smart nanoplatform with dual T_(1)-T_(2) activation for acidic microenvironment imaging

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Science China Materials 2024年第12期67卷 4101-4110页

作者： Meng Luo Jiajing Guo Yi Zhu Jiali Deng Hongwei Lu Lei Li Zhongling Wang Department of Medical Imaging The First Affiliated Hospital of Kangda College of Nanjing Medical University/The First People’s Hospital of LianyungangLianyungang 222000China Department of Radiology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Biomedical Engineering College of EngineeringShantou UniversityShantou 515063China

Acidity-activatable magnetic resonance imaging(MRI)nanoprobes offer great potential for in vivo cancer imaging by targeting the acidic tumor microenvironment(TME).However,their effectiveness is limited by the delayed response at tumor sites and uncontrollable background noise,compromising imaging accuracy and ***,an acidic TME-responsive nanoprobe,SPIO@ZIF-8@Gd(SZG),with dually activatable T_(1) and T_(2) MR signals is shown for acidity-selective contrast enhancement in a rapid response *** shows decreased T_(1) and T_(2) contrast intensity in normal physiological *** targeting acidic TME,the zeolitic imidazolate framework-8(ZIF-8)layer undergoes instantaneous decomposition,releasing Gd^(3+)(T_(1)-weighted),and exposing the inner SPIO(T_(2)-weighted)core,thereby sequentially recovering the *** to previously reported T_(1)-T_(2) nanoprobes,SZG demonstrates noticeable“dual activation”after just 30 min and reaches its peak 4 h after acid ***,it shows an excellent“acidity correlation”between relaxation times and pH *** the SZG nanoprobe is used combined with“dual-contrast enhanced subtraction(DESI)”,the contrast difference between diseased and normal tissue can be increased by 10 times,which is significantly higher than traditional single-mode T_(1)/T_(2) contrast ***,these findings demonstrate a rapid imaging strategy of dual-activation MR imaging of the acidic TME and simultaneous background suppression,thus paving the way for precise tumor malignancy differentiation,early tumor detection,and accurate tumor grading.

关键词： rapid response zeolitic imidazolate framework-8 dual T_(1)-T_(2)activation acidic tumor microenvironment

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Hydrogel Fiber Actuators Prepared by Shell-Core Structure for High‑Performance Water/Light Dual response

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Advanced Fiber Materials 2024年第6期6卷 1887-1897页

作者： Qianqian Wang Linping Zhang Yi Zhong Hong Xu Zhiping Mao Key Lab of Science and Technology of Eco‑Textile Ministry of EducationCollege of Chemistry and Chemical EngineeringDonghua UniversityShanghai 201620China Shanghai Belt and Road Joint Laboratory of Textile Intelligent Manufacturing Innovation Center for Textile Science and TechnologyDonghua UniversityShanghai 201620China

Spiral fibers with high energy storage and high output efficiency are highly desirable for soft robots and ***,it is still a great challenge to achieve spiral fibers with excellent water actuation performance,structural stability,and high scalability in a low-cost strategy.A coaxial spiral structure is reported for the fabrication of high-performance fiber *** developed shell-core helical fiber actuators were based on alginate/poly(ethylene glycol)acrylate shell and alginate/GO core with green and excellent *** to the high water-absorbing-swelling capacity and energy storage of the shell,the prepared spiral fibers are characterized by fast response,high energy output,and good repeatability of *** the other hand,the core endows the spiral fibers with the additional features of strong force retention and photothermal *** shell-core spiral structure promotes the output efficiency of the twisted fiber actuator with a large rotation(2500°/cm),untwisting speed(2250 rpm),and recovery speed(2700 rpm).In addition,the tertiary spiral structure based on TAPG fibers exhibits excellent humidity and photothermal response *** application of fibers to smart textiles enables efficient human epidermal thermal management.

关键词： Hydrogel fibers Shell-core structure rapid response Large recovery speed Water/light dual response

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Optimal reconfiguration of constellation using adaptive innovation driven multiobjective evolutionary algorithm

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Journal of Systems Engineering and Electronics 2021年第6期32卷 1527-1538页

作者： HU Jiaxin YANG Leping HUANG Huan ZHU Yanwei College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073China

Constellation reconfiguration is a critical issue to recover from the satellite failure,maintain the regular operation,and enhance the overall *** constellation reconfiguration problem faces the difficulties of high dimensionality of design variables and extremely large decision space due to the great and continuously growing constellation *** solve such real-world problems that can be hardly solved by traditional algorithms,the evolutionary operators should be promoted with available domain knowledge to guide the algorithm to explore the promising regions of the trade *** adaptive innovationdriven multi-objective evolutionary algorithm(MOEA-AI)employing automated innovation(AI)and adaptive operator selection(AOS)is proposed to extract and apply domain *** available knowledge is extracted from the final or intermediate solution sets and integrated into an operator by the automated innovation *** prevent the overuse of knowledgedependent operators,AOS provides top-level management between the knowledge-dependent operators and conventional evolutionary *** evaluates and selects operators according to their actual performance,which helps to identify useful operators from the candidate *** efficacy of the MOEAAI framework is demonstrated by the simulation of emergency *** was verified that the proposed algorithm can discover a non-dominant solution set with better quality,more homogeneous distribution,and better adaptation to practical situations.

关键词： constellation reconfiguration emergency observations rapid response multi-objective optimization

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Large-area flexible and transparent UV photodetector based on cross-linked Ag NW@ZnO NRs with high performance

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Journal of Materials Science & Technology 2022年第15期110卷 65-72页

作者： Lin Zhang Nuomei Li Qiuchen Ma Jiahui Ding Chuang Chen Zhaocheng Hu Weiwei Zhao Yufeng Li Huanhuan Feng Mingyu Li Hongjun Ji Sauvage Laboratory for Smart Materials ShenzhenKey Laboratory of Flexible Printed Electronics TechnologySchool of Materials Science and EngineeringHarbin Institute of TechnologyShenzhen 518055China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyShenzhen 518055China

A series of large-area,flexible and transparent ultraviolet(UV)photodetectors(PDs)based on Ag nanowire(NW)@ZnO nanorods(NRs)are fabricated by an inexpensive,facile and effective *** Ag NW@ZnO NRs are successfully synthesized using a two-step method in an oil bath with a high surface-to-volume ratio and good *** PDs are fabricated by drop-coating with different drop-coating times on the surface of polyethylene terephthalate(PET)coupled with Au *** optimizing the cross-linked network of Ag NW@ZnO NRs,PD2 with a size greater than 25 mm exhibits excellent photoresponse under UV light illumination of 365 nm(1.3 m W cm^(-2))with a bias of 5 V:a high sensitivity of over 10^(3),and a much shorter rise/decay time of 2.6 s/2.3 ***,the detector exhibits an average transmittance of more than 70%in the visible light region,as well as good flexibility and excellent mechanical stability under a bending angle of 120°over 1000 circles *** integral advantages have significant potential for practical applications and mass production.

关键词： Ag NW@ZnO NRs Low dark current rapid response Transparent Flexible Large-area

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Progress on intelligent hydrogels based on RAFT polymerization:Design strategy, fabrication and the applications for controlled drug delivery

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Chinese Chemical Letters 2020年第1期31卷 19-27页

作者： Caihong Xian Qijuan Yuan Ziting Bao Guiting Liu Jun Wu Key Laboratory of Sensing Technology and Biomedical Instrument of Guangdong Province School of Biomedical EngineeringSun Yat-sen UniversityGuangzhou 510006China Research Institute of Sun Yat-Sen University in Shenzhen Shenzhen 518057China

Although intelligent hydrogels have shown bright potential application in biomedical fields,they were prepared by conventional methods and still face many serious challenges,such as uncontrollable stimulus-response and low response ***,RAFT polymerization provides a versatile strategy for the fabrication of intelligent hydrogels with improved stimulus-response properties,owing to the ability to efficiently construct hydrogel precursors with well-defined structure,such as block copolymer,graft copolymer,star *** this review,we summarized the recent progress on intelligent hydrogels based on RAFT polymerization with emphasis on their fabrication strategies and applications for controlled drug delivery.

关键词： timulus-responsive Hydrogel RAFT polymerization Drug controlled release rapid response

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Global warming scenarios for the Eastern Adriatic Sea indicate a higher risk of invasiveness of non-native marine organisms relative to current climate conditions

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Marine Life Science & Technology 2024年第1期6卷 143-154页

作者： Branko Glamuzina Lorenzo Vilizzi Marina Piria Ante Zuljevic Ana Bratos Cetinic Ana Pesic Branko Dragicevic Lovrenc Lipej Marijana Pecarevic Vlasta Bartulovic Sanja Grđan Ivan Cvitkovic Tatjana Dobroslavic Ana Fortic Luka Glamuzina Borut Mavric Jovana Tomanic Marija Despalatovic Domen Trkov Marina Brailo Scepanovic Zoran Vidovic Predrag Simonovic Sanja Matic-Skoko Pero Tutman Department of Applied Ecology University of DubrovnikDubrovnikCroatia Department of Ecology and Vertebrate Zoology Faculty of Biology and Environmental ProtectionUniversity of LodzLodzPoland Faculty of Agriculture Department of FisheriesApicultureWildlife Management and Special ZoologyUniversity of ZagrebZagrebCroatia Institute of Oceanography and Fisheries SplitCroatia Institute of Marine Biology University of MontenegroKotorMontenegro National Institute of Biology Marine Biology Station PiranPiranSlovenia Teacher Education Faculty University of BelgradeBelgradeSerbia Faculty of Biology University of BelgradeBelgradeSerbia

Globally,marine bioinvasions threaten marine ecosystem structure and function,with the Mediterranean Sea being one of the most affected *** invasions are expected to increase due to climate *** conducted a risk screening of marine organisms(37 fishes,38 invertebrates,and 9 plants),both extant and‘horizon’(i.e.,not present in the area but likely to enter it).Based on expert knowledge for the Eastern Adriatic Sea coasts of Slovenia,Croatia,and Montenegro,screenings were conducted under both current and predicted climate conditions indicating with an increase in sea surface temperature and salinity of the Adriatic Sea together with changes in precipitation *** aims were to:(1)identify non-native extant and horizon marine species that may pose threats to native biodiversity and(2)evaluate the risk of invasiveness of the selected species under current and predicted climate *** the 84 species screened,there was an increase in those ranked as‘high risk’from 33(39.3%)under current climate conditions and to 47(56.0%)under global warming *** those ranked as‘very high’risk,the increase was from 6(7.1%)to 21(25.0%).Amongst the screened species,the already established high-risk species Pacific oyster Magallana gigas and Atlantic blue crab Callinectes sapidus represent a threat to ecosystem *** the under-representation of marine species in the current European Union List,the species we have ranked as high to very high risk should be included.

关键词： AS-ISK Early detection Introduction vectors/pathways Invasive species rapid response

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Solution of false alarm and slow response in flame detector

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Journal of Southeast University(English Edition) 2019年第2期35卷 174-178页

作者： Song Wengang Zhang Lijun Zheng Zhanqi Wang Guanying Zhang Jianming Institute of Microelectronics Chinese Academy of SciencesBeijing 100029China School of Microelectronics University of Chinese Academy of SciencesBeijing 100190China Wuhan Binhu Electronic Limited Liability Company Wuhan 430205China

A new flame detector with one ultraviolet and two infrared detectors is designed. The ultraviolet detector is of rapid response(≤10 μs) while the two infrared detectors usually have a response time of more than 5 ms. The ultraviolet detector is applied to deal with the flame of large scales. When facing the flame of mid or small scales, the three detectors cooperate. Employing the high-order derivatives of the sample data of the infrared circuits to improve the sensitivity, the response speed is greatly improved. The data of the temperature sensor is used to adjust circuit parameters in real time, thus reducing the effect of temperature drift. The flame detectors are tested at different distances and the response time is as rapid as 0.65 ms. The test results show that the new flame detector has the characteristics of high speed and a low rate of false alarms.

关键词： flame detector rapid response low false alarm rate derivative

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