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Hyperbranched Polyurethane Acrylate Applied to UV Curable Flame Retardant Coatings

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Chemical Research in Chinese Universities 2001年第3期17卷 331-333页

作者： zhu Sheng-Wu SHI wen-Fang State Key Laboratory of Fire Science Department of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026P.R.China

UV curable hyperbranched prepolymers based on amine-ester, ester-amide and ether-amide started with AB_2-type monomers have been prepared by the authors. A series of work on allyl ether maleate hyperbranched polyesters for UV curing coatings by Hult and his colleagues has been reported. However, the UV cured films from those materials are all flammable when attached to fire without addition of flame retardants.

关键词： Flame retardant Polyurethane acrylate Phosphorus UV curing

Design of Fault Detection Observer Based on Hyper Basis Function

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Tsinghua Science and Technology 2015年第2期20卷 200-204页

作者： Xin wen Xingwang Zhang Yaping zhu Faculty of Aerospace Engineering Shenyang Aerospace University College Astronautics Nanjing University of Aeronautics and Astronautics College Astronautics Nanjing University of Aeronautics and Astronautics

In this paper, we propose the Hyper Basis Function （HBF） neural network on the basis of Radial Basis Function （RBF） neural network. Compared with RBF, HBF neural networks have a more generalized ability with different activation functions. A decision tree algorithm is used to determine the network center. Subsequently, we design an adaptive observer based on HBF neural networks and propose a fault detection and diagnosis method based on the observer for the nonlinear modeling ability of the neural network. Finally, we apply this method to nonlinear systems. The sensitivity and stability of the observer for the failure of the nonlinear systems are proved by simulation, which is beneficial for real-time online fault detection and diagnosis.

关键词： observer fault detection hyper basis function neural networks

Modeling the heterogeneous traffic flow considering the effect of self-stabilizing and autonomous vehicles

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Chinese Physics B 2022年第2期31卷 434-443页

作者： Yuan Gong wen-Xing zhu School of Control Science and Engineering Shandong UniversityJinan 250061China

With the increasing maturity of automatic driving technology,the homogeneous traffic flow will gradually evolve into the heterogeneous traffic flow,which consists of human-driving and autonomous *** better study the characteristics of the heterogeneous traffic system,this paper proposes a new car-following model for autonomous vehicles and heterogeneous traffic flow,which considers the self-stabilizing effect of *** linear and nonlinear methods,this paper deduces and analyzes the stability of such a car-following model with the self-stabilizing ***,the model is verified by numerical *** results show that the self-stabilizing effect can make the heterogeneous traffic flow more stable,and that increasing the self-stabilizing coefficient or historical time length can strengthen the stability of heterogeneous traffic flow and alleviate traffic congestion *** addition,the heterogeneous traffic flow can also be stabilized with a higher proportion of autonomous vehicles.

关键词： heterogeneous traffic flow self-stabilizing effect car-following model autonomous vehicle

Ultrathin nanoporous metal electrodes facilitate high proton conduction for low-Pt PEMFCs

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Nano Research 2021年第8期14卷 2681-2688页

作者： shuai Shi Xianglong wen Qinqin Sang shuai Yin Kaili Wang Jian Zhang Min Hu Huiming Yin Jia He Yi Ding Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool oj Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

Design of catalyst layers(CLs)with high proton conductivity in membrane electrode assemblies(MEAs)is an important issue for proton exchange membrane fuel cells(PEMFCs).Herein,an ultrathin catalyst layer was constructed based on Pt-decorated nanoporous gold(NPG-Pt)with sub-Debye-length thickness for proton *** the absence of ionomer incorporation in the CLs,these integrated carbon-free electrodes can deliver maximum mass-specific power density of 198.21 and 25.91 kW·gPt^(-1) when serving individually as the anode and cathode,at a Pt loading of 5.6 and 22.0 pg·cm^(-2),respectively,comparable to the best reported nano-catalysts for ***-depth quantitative experimental measurements and finite-element analyses indicate that improved proton conduction plays a critical role in activation,ohmic and mass transfer polarizations.

关键词： nanoporous metal electrode proton exchange membrane fuel cell(PEMFC) ultrathin catalyst layer proton conduction dealloying

Effect of oxygen addition and annealing time on microstructure and mechanical properties of Ti-34Nb alloy

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Journal of Iron and Steel Research International 2023年第1期30卷 158-164页

作者： Jun-shuai Wang wen-long Xiao Lei Ren Yu Fu Chao-li Ma Key Laboratory of Aerospace Advanced Materials and Performance of Ministry of Education School of Materials Science and EngineeringBeihang UniversityBeijing 100191China

The effect of oxygen addition and annealing time on microstructure and mechanical properties of Ti-34Nb and Ti-34Nb-0.2O alloys was *** addition of O suppresses the martensitic *** phase composition changes from singleα''phase toα''+βphases with oxygen *** addition of oxygen increases strength significantly at as-received,cold-rolled,and annealed alloys through solid solution *** accumulation of abundance of defects and grain refinement introduced by cold rolling have a significant strengthening effect but also damage *** addition of oxygen increasesα/βtransformation temperature and promotes the precipitation ofαphase during annealing in Ti-34Nb-0.2O alloy.αprecipitates can inhibit grain growth during *** strength decreases with annealing time increased due to the increase in grain size in Ti-34Nb alloy,while the strength increases in Ti-34Nb-0.2O alloy mainly due to the precipitation ofα*** cold rolling followed by annealing and addition of oxygen can improve the properties of alloys.

关键词： Titanium alloy Oxygen addition Annealing time αprecipitate

CMAGAN:classifier-aided minority augmentation generative adversarial networks for industrial imbalanced data and its application to fault prediction

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Advances in Manufacturing 2024年第3期12卷 603-618页

作者： wen-Jie Wang Zhao Liu Ping zhu School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai200240People’s Republic of China National Engineering Research Center of Automotive Power and Intelligent Control Shanghai Jiao Tong UniversityShanghai200240People’s Republic of China School of Design Shanghai Jiao Tong UniversityShanghai200240People’s Republic of China

Class imbalance is a common characteristic of industrial data that adversely affects industrial data mining because it leads to the biased training of machine learning *** address this issue,the augmentation of samples in minority classes based on generative adversarial networks(GANs)has been demonstrated as an effective *** study proposes a novel GAN-based minority class augmentation approach named classifier-aided minority augmentation generative adversarial network(CMAGAN).In the CMAGAN framework,an outlier elimination strategy is first applied to each class to minimize the negative impacts of ***,a newly designed boundary-strengthening learning GAN(BSLGAN)is employed to generate additional samples for minority *** incorporating a supplementary classifier and innovative training mechanisms,the BSLGAN focuses on learning the distribution of samples near classification ***,it can fully capture the characteristics of the target class and generate highly realistic samples with clear ***,the new samples are filtered based on the Mahalanobis distance to ensure that they are within the desired *** evaluate the effectiveness of the proposed approach,CMAGAN was used to solve the class imbalance problem in eight real-world fault-prediction *** performance of CMAGAN was compared with that of seven other algorithms,including state-of-the-art GAN-based methods,and the results indicated that CMAGAN could provide higher-quality augmented results.

关键词： Class imbalance Minority class augmentation Generative adversarial network(GAN) Boundary strengthening learning(BSL) Fault prediction

Service Scheduling Based on Edge Computing for Power Distribution IoT

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Computers, Materials & Continua 2020年第3期62卷 1351-1364页

作者： zhu Liu Xuesong Qiu shuai Zhang Siyang Deng Guangyi Liu State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China State Grid Information&Telecommunication Group Co. Ltd.Beijing102211China Global Energy Interconnection Research Institute North America San JoseCA95134USA

With the growing amounts of multi-micro grids,electric vehicles,smart home,smart cities connected to the Power Distribution Internet of Things(PD-IoT)system,greater computing resource and communication bandwidth are required for power *** probably leads to extreme service delay and data congestion when a large number of data and business occur in *** paper presents a service scheduling method based on edge computing to balance the business load of *** architecture,components and functional requirements of the PD-IoT with edge computing platform are ***,the structure of the service scheduling system is ***,a novel load balancing strategy and ant colony algorithm are investigated in the service scheduling *** validity of the method is evaluated by simulation *** indicate that the mean load balancing ratio is reduced by 99.16%and the optimized offloading links can be acquired within 1.8 *** load of the nodes in edge computing platform can be effectively balanced through the service scheduling.

关键词： PD-IoT edge computing service scheduling load balancing strategy ant colony algorithm

Drying-rewetting rather than sieving stimulates soil respiration

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Pedosphere 2022年第2期32卷 359-363页

作者： Junjie LIN Weixin CHENG shuai ZHANG Biao zhu Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir Chongqing Three Gorges UniversityChongqing 404100China Department of Environmental Studies University of CaliforniaSanta Cruz CA 95064USA Institute of Ecology College of Urban and Environmental SciencesKey Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China

Dear Editor,Soils contain the largest carbon(C) pool in terrestrial *** a small change in soil C pool may significantly influence atmospheric carbon dioxide(CO_(2)) ***,it is critical to accurately assess the response of soil C pool to global *** incubation is a frequently used method to assess soil C decomposition rate because it allows environmental variables to be under control(Unger et al.,2010;Shi and Marschner,2014).However,pre-treatments during soil sampling and processing,such as sieving and drying-rewetting,inevitably bring physical disturbances which may affect soil respiration rate(Franzluebbers,1999;Thomson et al.,2010;Curtin et al.,2014).

关键词： soil dioxide Thomson

Origin,virological features,immune evasion and intervention of SARS-CoV-2 Omicron sublineages

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Signal Transduction and Targeted Therapy 2022年第8期7卷 2673-2679页

作者： shuai Xia Lijue Wang Yun zhu Lu Lu Shibo Jiang Key Laboratory of Medical Molecular Virology(MOE/NHC/CAMS) Shanghai Institute of Infectious Disease and BiosecuritySchool of Basic Medical SciencesShanghai Frontiers Science Center of Pathogenic Microbes and InfectionFudan UniversityShanghaiChina National Key Laboratory of Biomacromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijingChina

Recently,a large number of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)variants continuously emerged and posed a major threat to global public *** them,particularly,Omicron variant(B.1.1.529),first identified in November 2021,carried numerous mutations in its spike protein(S),and then quickly spread around the ***,Omicron variant has expanded into more than one hundred sublineages,such as BA.1,BA.2,BA.2.12.1,BA.4 and BA.5,which have already become the globally dominant *** from other variants of concern(VOCs)of SARS-CoV-2,the Omicron variant and its sublineages exhibit increased transmissibility and immune escape from neutralizing antibodies generated through previous infection or vaccination,and have caused numerous re-infections and breakthrough *** this prospective,we have focused on the origin,virological features,immune evasion and intervention of Omicron sublineages,which will benefit the development of nextgeneration vaccines and therapeutics,including pan-sarbecovirus and universal anti-CoV therapeutics,to combat currently circulating and future emerging Omicron sublineages as well as other SARS-CoV-2 variants.

关键词： features breakthrough expanded