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Physiological and psychological responses to tended plant communities with varying color characteristics

Journal of Forestry Research 2024年第1期35卷 183-201页

作者： Siyuan Zheng Yanzhen Zhou Haiyan qu School of Architecture and Urban Planning Shenyang Jianzhu UniversityShenyang 110168People’s Republic of China

Exposure to plants has been reported to promote health and reduce stress,and plant color has direct impacts on physical and mental *** used images of common types of tended plant communities in Shenyang,China,with combinations of yellow,green,and red foliage,as experimental stimuli.A total of 27 images were used as visual *** used electroencephalography to measureαwave activity(8-13 Hz)in 40 subjects while they viewed visual *** data were combined with subjective questionnaire data to analyze the relaxing effect of images of tended plant communities with different color types and proportions on *** results revealed that,although there were slight differences between the electroencephalography and psychological findings,women were significantly more relaxed than men after viewing the *** and psychological responses varied with the types and proportions of colors in the tended plant communities:those of foliage with combinations of two or three colors induced stronger responses than images with a single ***,(1)for one-color plant communities,green or yellow plant communities induced a stronger relaxation effect than red plant communities;(2)for two-color plant communities,the optimal color proportion was 55%+45%,and the green+yellow and green+red color combinations induced a stronger relaxation effect;(3)for three-color plant communities,the relaxation effect was strongest when the color proportion was 55%green+25%yellow+20%*** data would provide a plant color matching in future plant landscape design,which may be helpful for creating healthy and relaxing environments.

关键词： Plant community Color type Color ratio Electroencephalography Subjective questionnaire

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Long-term effects of electrochemical realkalization on carbonated concrete

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Frontiers of Structural and Civil Engineering 2020年第1期14卷 127-137页

作者： Peng ZHU Ji ZHANG Wenjun qu College of Civil Engineering Tongji UniversityShanghai 200092China Key Laboratory of Performance Evolution and Control for Engineering Structures Shanghai 200092China

The long-term effects of electrochemical realkalization on carbonated reinforced concrete with a W/C ratio of 0.65 were *** out of 16 carbonated specimens had been subjected to realkalization seven years ago,and the alkalinity of the concrete,the electrochemical characters(corrosion current density and potential)of the specimens and the corrosion conditions of the steel bars were *** of different specimens and also at different time(4,10,13 months and 7 years after realkalization)were *** to the phenolphthalein and pH meter test,the alkalinity of the concrete had disappeared after seven *** on the potentiodynamic polarization test,various corrosion conditions had developed on the steel bars,which was verified by visual *** bars were in the depassivated state,and their corrosion current densities increased significantly after seven *** developed in some of the specimens,and the diverse compactness of concrete and excessive current of realkalization were considered to be possible *** effects of the realkalization treatment vanished after seven years.

关键词： realkalization concrete carbonation polarization curve corrosion

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Role of dampers on the seismic performance of pin-supported wall-frame structures

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Earthquake Engineering and Engineering Vibration 2023年第2期22卷 453-467页

作者： Wang Xiaoyue qu Zhe Gong Ting Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationSanhe 065201China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China China Re Catastrophe Risk Management Company Ltd. Beijing 100000China

Pin-supported(PS)walls have been proven effective in avoiding weak story failure of frame structures by increasing the height-wise continuous stiffness and producing uniform distribution of story ***,little attention has been given to the floor velocity or acceleration responses of PS wall-frame structures,which predominate the seismic damage of various nonstructural components that are critical to the immediate occupancy and quick recovery of *** paper presents a numerical evaluation of the floor velocity and acceleration responses of PS wall-frame structures,highlighting the effects of different types of dampers accompanying the PS *** results show that the PS walls alone significantly increase the peak floor velocity(PFV)and peak floor acceleration(PFA)*** wall-frame structures with either steel or viscoelastic(VE)dampers are much less effective in reducing the PFV or PFA responses than they are in reducing the peak inter-story drift ratio(PIDR).The impact of this behavior is demonstrated by a seismic fragility analysis that incorporates demand parameters combining the maximum PIDR,average PFV and *** results show that the use of VE dampers rather than hysteretic dampers results in better protection of nonstructural components in PS wall-frame structures.

关键词： strong spine system energy-dissipating device floor acceleration floor velocity nonstructural damage

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Research progress on seismic imaging technology

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Petroleum Science 2022年第1期19卷 128-146页

作者： Zhen-Chun Li Ying-Ming qu School of Geosciences China University of PetroleumQingdaoShandong266580China Shandong Provincial Key Laboratory of Deep Oil&Gas China University of PetroleumQingdaoShandong266580China

High-precision seismic imaging is the core task of seismic exploration,guaranteeing the accuracy of geophysical and geological *** the development of seismic exploration,the targets become more and more *** on complex media such as subsalt,small-scale,steeply dipping and surface topography structures brings a great challenge to imaging ***,the seismic imaging methods range from stacking-to migration-to inversion-based imaging,and the imaging accuracy is becoming increasingly *** review paper includes:summarizing the development of the seismic imaging;overviewing the principles of three typical imaging methods,including common reflection surface(CRS)stack,migration-based Gaussian-beam migration(GBM)and reverse-time migration(RTM),and inversion-based least-squares reverse-time migration(LSRTM);analyzing the imaging capability of GBM,RTM and LSRTM to the special structures on three typical models and a land data set;outlooking the future perspectives of imaging *** main challenge of seismic imaging is to produce high-precision images for low-quality data,extremely deep reservoirs,and dual-complex structures.

关键词： Common reflection surface stack Gaussian-beam migration Reverse-time migration Least-squares reverse-time migration

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Fatigue shear performance of concrete beams reinforced with hybrid(glass-fiber-reinforced polymer+steel)rebars and stirrups

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Frontiers of Structural and Civil Engineering 2021年第3期15卷 576-594页

作者： Peng ZHU Jiajing XU Wenjun qu Department of Structural Engineering Tongji UniversityShanghai200092China School of Transportation and Civil Engineering Nantong UniversityNantong226019China

Reinforced concrete beams consisting of both steel and glass-fiber-reinforced polymer rebars exhibit excellent strength,serviceability,and ***,the fatigue shear performance of such beams is ***,beams with hybrid longitudinal bars and hybrid stirrups were designed,and fatigue shear tests were *** specimens that failed by fatigue shear,all the glass-fiber-reinforced polymer stirrups and some steel stirrups fractured at the critical diagonal *** the specimen that failed by the static test after 8 million fatigue cycles,the static capacity after fatigue did not significantly decrease compared with the calculated *** initial fatigue level has a greater influence on the crack development and fatigue life than the fatigue level in the later *** fatigue strength of the glass-fiber-reinforced polymer stirrups in the specimens was considerably lower than that of the axial tension tests on the glass-fiber-reinforced polymer bar in air and beam-hinge tests on the glass-fiber-reinforced polymer bar,and the failure modes were ***-fiber-reinforced polymer stirrups were subjected to fatigue tension and shear,and failed owing to shear.

关键词： fatigue shear hybrid stirrups hybrid reinforcement fiber-reinforced polymer

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Relation Between Strength and Hardness of High-Entropy Alloys

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Acta Metallurgica Sinica(English Letters) 2021年第11期34卷 1461-1482页

作者： Xiaojuan Fan Ruitao qu Zhefeng Zhang Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215132China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi'an 710072China

High-entropy alloys(HEAs)are composed of multiple principal elements and exhibit not only remarkable mechanical properties,but also promising potentials for developing numerous new *** fully realize such potentials,highthroughput preparation and characterization technologies are especially useful;thereby,the fast evaluations of mechanical properties will be urgently *** the relation between strength and hardness is of significance for quickly predicting the strength of materials through simple hardness ***,up to now the strength-hardness relation for HEAs is still a *** this work,the relations between tensile or compressive strength and Vickers hardness of various HEAs with hundreds of compositions at room temperature are investigated,and finally,the solution for estimating the strengths of HEAs from their hardness values is *** for hundreds of different HEAs were extracted from studies reported in the period from 2010 to *** results suggested that the well-known three-time relation(i.e.,hardness equals to three times the magnitude of strength)works for nearly all HEAs,except for a few brittle HEAs which show quite high hardness but low strength due to early ***,for HEAs with different phase structures,different strengths should be applied in using the 3-time relation,i.e.,yield strength for low ductility body-centered cubic(BCC)HEAs and ultimate strength for highly plastic and work-hardenable face-centered cubic(FCC)*** for dual-phase or multi-phase HEAs,similar 3-time relations can be also *** present approach sheds light on the mechanisms of hardness and also provides useful guidelines for quick estimation of strength from hardness for various HEAs.

关键词： High-entropy alloys Vickers hardness Strength Plasticity

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A Review on the Mullins Effect in Tough Elastomers and Gels

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Acta Mechanica Solida Sinica 2024年第2期37卷 181-214页

作者： Lin Zhan Shaoxing qu Rui Xiao MOE Key Lab of Disaster Forecast and Control in Engineering College of Mechanics and Construction EngineeringJinan UniversityGuangzhou510632China State Key Laboratory of Fluid Power and Mechatronic System Key Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceDepartment of Engineering MechanicsZhejiang UniversityHangzhou310027China

Tough elastomers and gels have garnered broad research interest due to their wide-ranging potential ***,during the loading and unloading cycles,a clear stress softening behavior can be observed in many material systems,which is also named as the Mullins *** this work,we aim to provide a complete review of the Mullins effect in soft yet tough materials,specifically focusing on nanocomposite gels,double-network hydrogels,and multi-network *** first revisit the experimental observations for these soft *** then discuss the recent developments of constitutive models,emphasizing novel developments in the damage mechanisms or network *** phenomenological models will also be briefly *** attention is then placed on the anisotropic and multiaxial modeling *** is demonstrated that most of the existing models fail to accurately predict the multiaxial data,posing a significant challenge for developing future anisotropic models tailored for tough gels and elastomers.

关键词： Mullins effect Double-network hydrogels Nanocomposite gels Multi-network elastomers Anisotropic damage model Multiaxial model

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Synergistic effects in Mn-Co mixed oxide supported on cordierite honeycomb for catalytic deep oxidation of VOCs

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Journal of Environmental Sciences 2022年第2期34卷 231-243页

作者： Hongyang Zhao Hui Wang Zhenping qu Key Laboratory of Industrial Ecology and Environmental Engineering School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

A series of Co-Mn mixed oxide catalyst supported on a cordierite monolith was facilely synthesized by ultrasonic *** catalytic performance was evaluated in the combustion of toluene,ethyl acetate and its *** was observed that with incorporating Mn into Co_(3)O_(4),the formation of solid solution with spinel structure could significantly improve the catalytic activity of pure phase Co_(3)O_(4).And the monolithic Co_(0.67)Mn_(0.33)O_(x) catalyst showed the best catalytic performance in the catalytic oxidation of toluene and ethyl acetate which could be completely oxidized at 220 and 180℃ respectively under the reaction velocity(WHSV)about 45,000 m L/(g·hr)and pollutant concentration of 500 ppm *** total conversion temperature of the VOCs mixture was at 230℃(500 ppm V toluene and 500 ppm V ethyl acetate)and determined by the temperature at which the most difficult molecule was *** excellent catalytic performance of monolithic Co_(0.67)Mn_(0.33)O_(x) was attributed to the higher content of Mn^(3+),Co^(3+),surface adsorbed oxygen and better redox *** prepared catalyst showed the good mechanical stability,reaction stability,and good adaptability to different reaction conditions.

关键词： Catalytic oxidation Cobalt Manganese Cordierite Monolithic catalyst

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Towards“General Purpose”Brain-Inspired Computing System

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Tsinghua Science and Technology 2021年第5期26卷 664-673页

作者： Youhui Zhang Peng qu Weimin Zheng the Department of Computer Science and Technology Tsinghua UniversityBeijing 100084China

Brain-inspired computing refers to computational models,methods,and systems,that are mainly inspired by the processing mode or structure of brain.A recent study proposed the concept of"neuromorphic completeness"and the corresponding system hierarchy,which is helpful to determine the capability boundary of brain-inspired computing system and to judge whether hardware and software of brain-inspired computing are compatible with each *** a position paper,this article analyzes the existing brain-inspired chips design characteristics and the current so-called"general purpose"application development frameworks for brain-inspired computing,as well as introduces the background and the potential of this ***,some key features of this concept are presented through the comparison with the Turing completeness and approximate computation,and the analyses of the relationship with"general-purpose"brain-inspired computing systems(it means that computing systems can support all computable applications).In the end,a promising technical approach to realize such computing systems is introduced,as well as the on-going research and the work *** believe that this work is conducive to the design of extensible neuromorphic complete hardware-primitives and the corresponding *** this basis,it is expected to gradually realize"general purpose"brain-inspired computing system,in order to take into account the functionality completeness and application efficiency.

关键词： brain-inspired computing neuromorphic computing computational completeness hardware/software decoupling system hierarchy

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Wavelet-based classification and influence matrix analysis method for the fast discrimination of Chinese herbal medicines according to the geographical origins with near infrared spectroscopy

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Journal of Innovative Optical Health Sciences 2014年第4期7卷 21-31页

作者： Wenlong Li Haibin qu Pharmaceutical Informatics Institute Zhejiang University No.866 Yuhangtang Road Hangzhou310058P.R.China

A discriminant analysis technique using wavelet transformation(WT)and influence matrixanalysis(CAIMAN)method is proposed for the near infrared(NIR)spectroscopy *** the proposed methodology,NIR spectra are decomposed by WT for data com-pression and a forward feature selection is further employed to extract the relevant informationfrom the wavelet coefficients,reducing both classification errors and model ***-CAIMAN(D-CAIMAN)method is utilized to build the classification model inwavelet domain on the basis of reduced wavelet coefficients of spectral *** spectradata set of 265 salviae miltiorrhizae radia samples from 9 different geographical origins is usedas an example to test the classification performance of the *** a comparison,k-nearest neighbor(KNN),linear discriminant analysis(LDA)and quadratic discriminant analysis(QDA)methods are also employed.D-CAIMAN with wavelet-based feature selection(WD-CAIMAN)method shows the best performance,achieving the total classification rate of ioo%in both cross-validation set and prediction *** is worth noting that the WD-CAIMANclassifier also shows improved sensitivity,selectivity and model interpretability in ***.

关键词： Discriminant analysis near infrared spectroscopy Chinese herbal medicines variable selection wavelet analysis

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