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Rare Metals 2021年第4期40卷 799-807页

作者： Kai Zhou Wen-Lu He Xiao zhang Bin zhang Xiang-Nan gong Kai-Wen Wang Zhi-Chao zhang Xi-Lan zhang Zhi-Ning Xia Xiao-Yuan Zhou Analytical and Testing Center Chongqing UniversityChongqing 401331China College of Physics Chongqing UniversityChongqing 401331China Beijing Key Laboratory and Institute of Microstructure and Property of Advanced Materials Beijing University of TechnologyBeijing 100124China School of Materials Science and Engineering Chongqing UniversityChongqing 400045China

A fully integrated X-ray photoelectron spectrometer(XPS) was employed for the investigation of the separation processes and recombination behaviors of photogenerated electrons and holes on the surface of AgCl and ultra-small nano-titanium oxide cluster composite photocatalyst(AgCl/TiO_(2)).A facile route,by direct colloidal synthesis,for preparing AgCl/TiO_(2)with high stability and enhanced visible light(Vis) driven catalytic activity was *** photocatalytic activity of AgCl/TiO_(2),which revealed that the photo-degradation rate of the as-prepared AgCl/TiO_(2)was nearly 10.5 times higher than that of bare AgCl,was evaluated by applying it to the photo-degradation of methyl orange(MO) in water ***,AgCl/TiO_(2)exhibited an outstanding long-term stability during ten cycles of *** band gap of AgCl decreased from 3.25 to 2.85 eV because of the ultrasmall nano-TiO_(2)clusters that were pinned to its *** results indicate that the band gap narrowing and surface plasmon resonance(SPR) of Ag(0) were two major contributors to the enhancement of the photocatalytic activity of AgCl/TiO_(2)by improving the utilization of *** situ XPS analysis was,therefore,certified as a beneficial method to explore the catalytic mechanism of photocatalysts.

关键词： Photocatalysis AgCl/TiO_(2) Fully integrated XPS Band gap narrowing

Ester Bond Containing Protein:Mechanically Stable Yet Dynamic

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Chemical Research in Chinese Universities 2021年第6期37卷 1352-1353页

作者： zhang Wenke State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun130012P.R.China

gram-positive pathogens can colonize on mucosal tissues stably withstanding large mechanical disturbance from coughing and sneezing by secreting special surface adhesion ***,how these proteins resist mechanical unfolding remains *** a recent work,using single molecule force spectroscopy,Cao et *** that an ester bond containing surface adhesion protein from gram-positive bacteria,Clostridium perfringenes.

关键词： positive standing stably

Influence of toxic substances on dynamical behavior of a delayed diffusive predator-prey model

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International Journal of Biomathematics 2024年第2期17卷 177-200页

作者： Honglan Zhu Xuebing zhang Hao zhang Business School Huaiyin Institute of Technology Huai'an 223003P.R.China College of Mathematics and Statistics Nanjing University of Information Science and Technology Nanjing210044 P.R.China Jiangsu Key Laboratory of Trafic and Transportation Security Huaiyin Institute of Technology Huaian 223003P.R.China

In this paper,we propose and investigate a delayed diffusive predator-prey model affected by toxic *** first study the boundedness and persistence property of the *** analyzing the associated characteristic equation,we obtain the conditions for the existence of steady state bifurcation,Hopf bifurcation and Turing ***,we also study the Hopf bifurcation induced by the ***,our theoretical results are verified by numerical *** numerical observation results are in good agreement with the theoretically predicted *** and numerical simulations indicate that toxic substances have a great impact on the dynamics of the system.

关键词： Toxicant delay diffusion bifurcation spatial pattern

Robust formation control for missiles with obstacle avoidance

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Chinese Journal of Aeronautics 2022年第1期35卷 70-80页

作者： Yong gUO Dan-yang SONg Changqing WANg Jinpeng zhang gongping zhang Aijun LI School of Automation Northwestern Polytechnical UniversityXian 710000China Luoyang Optoelectro Technology Development Center Luovang 471000China Aviation Key Laboratory of Science and Technology on Airborne guided Weapons Luoyang 471000China

This paper investigates the robust formation control for missiles with obstacle avoidance.A sliding mode surface that is asymptotically stable is firstly presented by the collision avoidance potential function and hyperbolic tangent *** on the sliding mode surface,a robust formation controller with obstacle avoidance is designed for *** improve the convergence rate,a finite-time controller which can deal with the formation control for missiles is given using an improved sliding mode ***,the effectiveness of the designed controllers for missiles is demonstrated by the Lyapunov theory and simulation results.

关键词： Collision avoidance Finite-time control Missile formation Potential function Sliding mode control

A New Equalization Method for Lithium-Ion Battery Packs Based on CUK

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Energy Engineering 2024年第6期121卷 1459-1472页

作者： Yu zhang Sheng Tian Yongkang zhang School of Electrical and Electronic Engineering Hubei University of TechnologyWuhan430000China

Aiming at the traditional CUK equalizer can only perform energy equalization between adjacent batteries,if the two single batteries that need to be equalized are far away from each other,there will be the problem of longer energy transmission path and lower equalization efficiency,this paper optimizes the CUK equalizer and optimizes its peripheral selection circuit,which can support the equalization of single batteries at any two *** control strategy adopts the open-circuit voltage(OVC)of the battery and the state of charge(SOC)of the battery as the equalization variables,and selects the corresponding equalization variables according to the energy conditions of the two batteries that need to be equalized,and generates the adaptive equalization current with an adaptive PID controller in order to improve the equalization *** modeling is performed in Matlab/Simulink 2021b,and the experimental results show that the optimized CUK equalizer in this paper improves the equalization time by 25.58%compared with the traditional CUK *** addition,compared with the mean value difference(MVD)method,the adaptive PID method reduces the equalization time by about 30%in the static and charging and discharging experimental environments,which verifies the superiority of this equalization scheme.

关键词： battery balancing CUK equalizer adaptive PID SOC

Antifreezing and Stretchable Organohydrogels as Soft Actuators

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Research 2019年第1期2019卷 14-24页

作者： Yukun Jian Baoyi Wu Xiaoxia Le Yun Liang Yuchong zhang Dachuan zhang Ling zhang Wei Lu Jiawei zhang Tao Chen Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences 19A Yuquan RoadBeijing 100049China

Inspired by the freezing tolerance performances found in living creatures, an effect approach is presented to develop novelantifreezing polymeric organohydrogel actuators. Through construction of a bilayer hydrogel including a nonresponsivepolyacrylamide (PAAm) layer and a pH-responsive polyacrylic acid (PAA) layer in the presence of a mixed solvent of water andglycerol, organohydrogel actuators that could produce various shape deformations at subzero temperatures have been achieved,and the actuating speed could be tuned by adjusting the temperature and the ratio between glycerol and water. Moreover, aseries of application demonstrations including a weightlifting robot, artificial valve, and robotic arm have been displayed. Inaddition, by introducing the ionic compound KI into the glycerol-based organogel, flexible conductors that could perform stablesensing performance over a wide range of temperatures from -30℃ to 60℃ have been developed.

关键词： freezing hydrogel organo

Sedimentary Paleoenvironment of the Eastern Hexi Corridor, NW China: Constraints from Chert geochemistry and Sedimentary Analysis of Early Paleozoic Strata

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Acta geologica Sinica(English Edition) 2020年第4期94卷 1223-1237页

作者： zhang Yiping CHEN Xuanhua AVZUZA zhang Beihang ZHAO Heng Chinese Academy of geological Sciences Beijing 100037China Nevada Bureau of Mines and geology University of NevadaReno89557USA Institute of geology Chinese Academy of Geological SciencesBeijing 100037China

The eastern Hexi Corridor, northwest China, is located at the tectonic junction of the Alxa Block, the North China Craton, and the Qinling-Qilian Orogen. The early Paleozoic Xiangshan group record critical information regarding paleoenvironment, paleoclimate and paleotectonic setting, from which we here present a focused study on the chert beds within the Xiangshan group. Through field mapping, microstructural observation, whole-rock geochemistry analyses and detrital zircon dating, we suggest that the Xiangshan group chert was deposited along a passive continental margin, formed primarily through biological activity with minor hydrothermal influence and terrestrial input. The characteristics of the chert support a low latitude sedimentary paleoenvironmental origin, and reveal the fact that the Alxa Block was separated from the North China craton, while emerged some paleogeographic affinity with the Qilian region in the Middle-Late Cambrian.

关键词： geochemistry sedimentary paleoenvironment Early Paleozoic Xiangshan group chert Hexi Corridor

Red carbon dots as label-free two-photon fluorescent nanoprobes for imaging of formaldehyde in living cells and zebrafishes

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Chinese Chemical Letters 2020年第3期31卷 759-763页

作者： Hong Wang Jing Wei Chonghua zhang Yuan zhang Yubin zhang Lin Li Changmin Yu Peisheng zhang Jian Chen Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education Hunan Provincial Key Laboratory of Controllable Preparationand Functional Application of Fine PolymersHunan Provincial Key Lab of Advanced Materials for New Energy Storage and ConversionHunan Province College KeyLaboratory of QSAR/QSPRSchool of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan 411201China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech UniversityNanjing 211800China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640China

Direct,in situ selective detection of intracellular formaldehyde(FA)is of great significance for understanding its function in FA-related ***,red carbon dots(RCD)are reported as label-free two-photon fluorescent nanoprobes for detecting and imaging of *** addition of FA,the-NH2 groups of RCD could quickly and specially react with aldehydes to form Schiff base and then the strong fluorescence of RCD with blue-shift emission is recovery due to the destruction of the hydrogen bond interaction between RCD and *** addition,the nanoprobes exhibit outsta nding photo stability,rapid response(gh sensitivity(~9.9μmol/L)and excellent selectivity toward FA over other aldehyde group ***,owing to the good cell-membrane permeability and biocompatibility,as well as the large two-photon absorption cross-section,the as-prepared RCD can be used as label-free nanoprobes for selectively detecting and imaging FA in living cells and zebrafishes through one-photon and two-photon ***,RCD could stain the tissue of zebrafishes at depths interval of up to 240μm under two-photon *** research implied that RCD are promising tools for directly and in situ imaging FA in vivo,thus providing critical insights into FA-related pathophysiological processes.

关键词： Carbon dots(CDs) Two-photon excitation Formaldehyde(FA) Intracellular imaging Zebrafishes

Clinical features of Parkinson’s disease with and without rapid eye movement sleep behavior disorder

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Translational Neurodegeneration 2017年第1期6卷 347-352页

作者： Ye Liu Xiao-Ying Zhu Xiao-Jin zhang Sheng-Han Kuo William g.Ondo Yun-Cheng Wu Department of Neurology Shanghai General HospitalShanghai Jiao Tong University School of MedicineNo.100Haining RoadShanghai 200080People’s Republic of China Department of Neurology College of Physicians and SurgeonsColumbia UniversityNew YorkUSA Methodist Neurological Institute HoustonTXUSA

Background:Rapid eye movement sleep behavior disorder(RBD)and Parkinson’s disease(PD)are two distinct clinical diseases but they share some common pathological and anatomical *** study aims to confirm the clinical features of RBD in Chinese PD ***:One hundred fifty PD patients were enrolled from the Parkinson`s disease and Movement Disorders Center in Department of Neurology,Shanghai general Hospital from January 2013 to August *** study examined PD patients with or without RBD as determined by the REM Sleep Behavior Disorder Screening Questionnaire(RBDSQ),assessed motor subtype by Unified PD Rating Scale(UPDRS)III at“on”state,and compared the sub-scale scores representing tremor,rigidity,appendicular and *** also assessed the Hamilton Anxiety Scale(HAMA),Hamilton Depression Scale(HAMD),Mini-Mental State Examination(MMSE),Clinical Dementia Rating(CDR),and Parkinson’s disease Sleep Scale(PDSS).Results:One hundred fourty one PD patients entered the final study.30(21.28%)PD patients had probable RBD(pRBD)diagnosed with a RBDSQ score of 6 or *** were no significant differences for age,including age of PD onset and PD duration,gender,smoking status,alcohol or coffee use,presence of anosmia or freezing,UPDRS III,and H-Y stages between the pRBD+and pRBD−***+group had lower MMSE scores,higher PDSS scores,and pRBD+PD patients had more prominent proportion in anxiety,depression,constipation,hallucination and a greater prevalence of orthostatic ***:pRBD+PD patients exhibited greater changes in non-motor ***,there was no increase in motor deficits.

关键词： Rapid eye movement sleep behavior disorder Parkinson’s disease Depression Cognitive decline Orthostatic hypotension Motor deficits

Properties of Berwald scalar curvature

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Frontiers of Mathematics in China 2020年第6期15卷 1143-1153页

作者： Ming LI lIHONg zhang Mathematical Science Research Center Chongqing University of TechnologyChongqing 400054China School of Sciences Chongqing University of TechnologyChongqing 400054China

We prove that a Finsler manifold with vanishing Berwald scalar curvature has zero *** a consequence,Landsberg manifolds with vanishing Berwald scalar curvature are Berwald ***(α,β)-metrics on manifold of dimension greater than 2,if the mean Landsberg curvature and the Berwald scalar curvature both vanish,then the Berwald curvature also vanishes.

关键词： Landsberg curvature Berwald curvature E-curvature S-curvature Berwald scalar curvature