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Journal of Bionic Engineering 2023年第3期20卷 1198-1262页

作者： y.n Han Weibin chen Ali Asghar Heidari Huiling chen Department of Computer Science and Artificial Intelligence Wenzhou UniversityWenzhou325035China School of Survey.ng and Geospatial Engineering College of EngineeringUniversity of TehranTehranIran

Coronavirus Disease 2019(COVID-19)is the most severe epidemic that is prevalent all over the *** quickly.and accurately.identify.ng COVID-19 is of great significance to controlling the spread speed of the ***,it is essential to accurately.and rapidly.identify.COVID-19 lesions by.analy.ing Chest X-ray *** we all know,image segmentation is a critical stage in image processing and *** achieve better image segmentation results,this paper proposes to improve the multi-verse optimizer algorithm using the Rosenbrock method and diffusion mechanism named *** utilizes RDMVO to calculate the maximum Kapur’s entropy.for multilevel threshold image *** image segmentation scheme is called *** ran two sets of experiments to test the performance of RDMVO and ***,RDMVO was compared with other excellent peers on IEEE CEC2017 to test the performance of RDMVO on benchmark ***,the image segmentation experiment was carried out using RDMVO-MIS,and some meta-heuristic algorithms were selected as *** test image dataset includes Berkeley.images and COVID-19 Chest X-ray *** experimental results verify.that RDMVO is highly.competitive in benchmark functions and image segmentation experiments compared with other meta-heuristic algorithms.

关键词： COVID-19 Multilevel threshold image segmentation Kapur’s entropy Multi-verse optimizer Meta-heuristic algorithm Bionic algorithm

Combustion of B4C/KNO3 binary.py.otechnic sy.tem

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Defence Technology.防务技术） 2021年第2期17卷 692-702页

作者： Jing-ran Xu chen-guang y.n chen-guang Zhu Department of Applied Chemistry School of Chemical EngineeringNanjing University of Science and TechnologyNanjingJiangsuChina

Presented herein is an experimental study.on the combustion of B4C/KNO3 binary.py.otechnic *** products were tested using X-ray diffraction(XRD),scanning electron microscopy.SEM),and energy.dispersive spectrometer(EDS).According to the results of tests and CEA calculation,the combustion reaction equation was *** flames and burning rates were recorded by.a high speed camera and a *** effect of B4C particle size on the thermal sensitivity.of B4C/KNO3 was investigated by.differential scanning calorimetry.DSC)*** addition,a reliable method for calculating the flame temperature was *** on the results of experiments,the combustion reaction mechanism was briefly.*** burning rate,flame temperature and thermal sensitivity.of B4C/KNO3 increase with the decrease of B4C particle *** mass ratio of B4C/KNO3 has a great effect on combustion ***-rich compositions have low flame temperatures,low burning rates,and provide green light *** combustion reactions of fuel-rich compositions are vigorous,and the B4C/KNO3 with mass ratio of 25:75 has the highest burning rate and the highest flame temperature.

关键词： Py.otechnics Combustion Flame Boron carbide

Inverse gradient nanostructure through gradient cold rolling demonstrated with superelasticity.improvement in Ti-50.3Ni shape memory.alloy

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Journal of Materials Science & Technology 2024年第18期185卷 233-244页

作者： Jian Zhang Ke Liu Tong chen chen Xu chen chen Dingshun y.n Ann-Christin Dippel Jun Sun Xiangdong Ding Jiangsu Key.Laboratory.of Advanced Food Manufacturing Equipment and Technology Jiangnan UniversityWuxi 214122China State Key.Laboratory.for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China School of Materials Science and Engineering Central South UniversityChangsha 410083China Deutsches Elektronen-Sy.chrotron DESy Notkestrasse 85Hamburg 22607Germany

Gradient nanostructured(GNS)metallic materials are commonly.achieved by.gradient severe plastic de-formation with a gradient of nano-to micro-sized structural units from the surface/boundaries to the ***,such GNS can be inversely.positioned,which however has not y.t been *** present work reports a facile method in deformation gradient control to attain inverse gradient nanostructured(iGNS),i.e.,tailoring the cross-section shape,successfully.demonstrated in Ti-50.3Ni shape memory.alloy.SMA)wire through cold *** microstructure of the rolled wire is characterized by.a macroscopic inverse gradient from boundaries to the center—the average sizes of grain and martensite domain evolve from micrometer to nanometer *** iGNS leads to a gradient martensitic transforma-tion upon stress,which has been proved to be effectively.reversible via in-situ bending scanning electron microscopy.SEM)*** iGNS Ti-50.3Ni SMA exhibits quasi-linear superelasticity.SE)in a wide temperature range from 173 to 423 *** to uniform cold rolling,the gradient cold rolling with less overall plasticity.further improves SE strain(up to 4.8%)and SE ***-situ tensiling sy.chrotron X-ray diffraction(SXRD)analy.is reveals the underly.ng mechanisms of the unique SE in the iGNS *** provides a new design strategy.to realize excellent SE in SMAs and sheds light on the advanced GNS metallic materials.

关键词： Inverse gradient nanostructured metallics Gradient cold rolling Shape memory.alloy. Gradient martensitic transformation Superelasticity

Alternating Terpoly.ers Based on Tunable Bi-donors with Manipulating Energy.Levels and Molecular Geometry

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Chemical Research in Chinese Universities 2017年第2期33卷 305-311页

作者： chen Zhenzhu y.NG Jia WU Feiy.n chen Lie chen y.wang College of Chemistry Institute of Polymers Nanchang University Nanchang 330031 P. R. China Jiangxi Provincial Key.Laboratory.of New Energy.Chemistry Nanchang University Nanchang 330031 P. R. China

Three novel regular acceptor-donorl-acceptor-donor2（A-D1-A-D2） terpoly.ers were prepared via em-bedding a second donor（D2） unit into the traditional D-A backbone to manipulate the energy.levels and moleculargeometry.with no complex sy.thesis or solubility.loss. In these A-D1-A-D2 terpoly.ers, benzodithiophene（BDT, D1）and diketopy.rolopy.role（DPP, A） were selected as the basic skeleton, and the dithienopy.role（DTPy., carbazole（CZ）and fluorine（FL） units with different electron donating ability.were chosen as the second donor trait（D2）. The HOMOenergy.levels can be effectively.modulated by.only.vary.ng D2 unit because of the push-pull interaction between do-nor and acceptor units. Versus the D-A bipoly.er PDPP-BDT, incorporation of the D2 unit into the copoly.ers candistinctly.lower the highest occupied molecular orbital（HOMO） levels to -5.47 eV for PDDPP-BDT-DTPy. -5.38 eVfor PDDPP-BDT-CZ and -5.23 eV for PDDPP-BDT-FL, which shows the strong dependence on electron-donatingability. Density.functional theory.DFT） simulation and X-ray diffraction（XRD） measurements also reveal the effectof the D2 units on the molecular geometry.of the terpoly.ers and their molecular packing. Notably. aPDDPP-BDT-DTPy.combined with a thiophene ring and forked tail pendant away.from the backbone had less back-bone torsion and more compact packing than the other two counterparts. These results demonstrate that embedding asecond donor（D2） unit into the backbone to construct an A-D1-A-D2 structure can be an effective and direct strategy.o manipulate the energy.levels and molecular geometry.and develop organic semiconducting materials.

关键词： Terpoly.er Electron-donating Energy level Molecular geometry

Identify.ng a melanogenesis-related candidate gene by.a high-quality.genome assembly.and population diversity.analy.is in Hy.sizy.us marmoreus

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Journal of Genetics and Genomics 2021年第1期48卷 75-87页

作者： Gang Wang Lianfu chen Weiqi Tang y.any.an Wang Qing Zhang Hongbo Wang Xuan Zhou Haofeng Wu Lin Guo Meijie Dou Lei Liu Baiy. Wang Jingxian Lin Baogui Xie Zhengchao Wang ZhongJian Liu ray Ming Jisen Zhang Center for Genomics and Biotechnology Haixia Institute of Science and TechnologyFujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyCollege of Life SciencesFujian Agriculture and Forestry UniversityFuzhou 350002China School of Geographical Science Nantong UniversityNantong 226001China South China Botanical Garden Chinese Academy of SciencesGuangzhou 510650China Institute of Oceanography Marine Biotechnology CenterMinjiang UniversityFuzhou 350108China College of Agriculture Fujian Agriculture and Forestry UniversityFuzhou 350002China Provincial Key.Laboratory.for Developmental Biology.and Neurosciences College of Life SciencesFujian Normal UniversityFuzhou 350007China Key.Laboratory.of National Forestry.and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350002China Department of Plant Biology University of Illinois at Urbana-ChampaignUrbanaIL 61801USA

Hy.sizy.us marmoreus is one of the most important edible fungi in Basidiomy.ete division and includes white and gray ***,very.limited knowledge is known about the genomic structures and the genetic basis for the white/gray diversity.of this ***,we report the near-complete high-quality.*** genome at the chromosomal *** genomics analy.is indicates that chromosome structures were relatively.conserved,and variations in collinearity.and chromosome number were mainly.attributed by.chromosome split/fusion events in Aragicales,whereas the fungi genome experienced many.genomic chromosome fracture,fusion,and genomic replication events after the split of Aragicales from *** of 57 strains allows us to classify.the population into four major groups and associate genetic variations with morphological features,indicating that white strains were not originated *** further generated genetic populations and identified a cy.ochrome P450 as the candidate causal gene for the melanogenesis in *** based on bulked segregant analy.is (BSA)and comparative transcriptome *** high-quality.*** genome and diversity.data compiled in this study.provide new knowledge and resources for the molecular breeding of *** as well as the evolution of Basidiomy.ete.

关键词： Hy.sizy.us marmoreus Basidiomy.ota P450 Bulked segregant analy.is(BSA) Melanogenesis

Surface analy.is and electrochemical behaviour of the self-assembled poly.opamine/dodecanethiol complex films in protecting 304 stainless steel

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Science China(Technological Sciences) 2012年第6期55卷 1527-1534页

作者： chen y.any.an chen ShouGang chen y.n SONG XianWang XU FengZhen Institute of Material Science and Engineering Ocean University of ChinaQingdao 266100China

A self-assembled 1-dodecanethiol film assisted with the preferential adhesion of poly.opamine was prepared on the non-etching 304 stainless steel surfaces by.a simple dip-coating *** formation and surface structure of the film were characterized by.water contact angle measurement,atomic force microscopy.AFM),and X-ray photoelectron spectroscopy.XPS).The corrosion behavior of the complex films was evaluated by.Tafel polarization curve and electrochemical impedance spectroscopy.EIS).The excellent corrosion resistance property.could be attributed to the compact hy.rid film structure and superior seawater stability.for modified 304 stainless steel surface.

关键词： stainless steel poly.er coatings EIS XPS AFM

Recent advances in metal-organic frameworks for X-ray detection

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Science China Chemistry 2022年第12期65卷 2338-2350页

作者： Hongming chen Jingru chen Menghua Li Minghua y.u Qiushui chen Meijin Lin Huanghao y.ng College of Materials Science and Engineering Fuzhou UniversityFuzhou 350116China College of Chemistry Fuzhou UniversityFuzhou 350116China College of Materials Science and Engineering Fujian University of TechnologyFuzhou 350118China

Metal-organic frameworks(MOFs)are a class of fascinating supramolecular cry.talline materials that have been widely.developed for cataly.is,gas storage,illumination,drug delivery.cy.oprotection,and so ***,MOFs have been found to have potential applications in X-ray detection due to their high sensitivity.fast response time,high absorption coefficient,and radiation *** this review,we present an overview on the fundamental mechanism of using MOFs for X-ray *** further discuss the recent developments in X-ray detection based on indirect X-ray scintillation and direct X-ray ***,we provide a summary.and a perspective on the future of this promising research field.

关键词： metal-organic frameworks scintillation X-ray detection semiconducting

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Interactions of molten salts with cathode products in the FFC Cambridge Process

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International Journal of Minerals,Metallurgy.and Materials 2020年第12期27卷 1572-1587页

作者： George Z.chen Department of Chemical and Environmental Engineering Faculty of EngineeringUniversity of NottinghamNottingham NG72RDUK Department of Chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100China

Molten salts play.multiple important roles in the electroly.is of solid metal compounds,particularly.oxides and sulfides,for the extraction of metals or *** of these roles are positive in assisting the extraction of metals,such as dissolving the oxide or sulfide anions,and transporting them to the anode for discharging,and offering the high temperature to lower the kinetic barrier to break the metal-oxy.en or metal-sulfur ***,molten salts also have unfavorable effects,including electronic conductivity.and significant capability.of dissolving oxy.en and carbon dioxide *** addition,although molten salts are relatively.simple in terms of composition,phy.ical properties,and decomposition reactions at inert electrodes,in comparison with aqueous electroly.es,the high temperatures of molten salts may.promote unwanted electrode-electroly.e *** article reviews briefly.and selectively.the research and development of the F ray-F arthing-chen(FFC)Cambridge Process in the past two decades,focusing on observations,understanding,and solutions of various interactions between molten salts and cathodes at different reduction states,including perovskitization,non-wetting of molten salts on pure metals,carbon contamination of products,formation of oxy.hlorides and calcium intermetallic compounds,and oxy.en transfer from the air to the cathode product mediated by.oxide anions in the molten salt.

关键词： FFC Cambridge Process molten salts electroly.is extraction oxides sulfides metals alloy. reaction mechanisms

Experimental isothermal section phase diagram of Ho-Fe-In at 773 K and magnetic properties of Ho_(12)Fe_(2.08)In_(2.92) alloy

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Rare Metals 2021年第4期40卷 987-994页

作者： Xiang chen Chao Ni The College of Phy.ics and Electronic Information Engineering Neijiang Normal UniversityNeijiang 641002China The Ames Laboratory U.S.Department of EnergyIowa State UniversityAmesIA 50011-3020USA

The isothermal section of the Ho-Fe-In sy.tem at 773 K has been constructed by.X-ray powder *** known structure ternary.compound Er_(12)Fe_(2) In_(3)-ty.e Ho_(12)Fe_(2) In_(3) has been *** the same time,solid solutions are not detected in Ho-Fe-In sy.tem at 773 *** magnetic transition and magnetocaloric effect of Ho_(12)Fe_(2.08)In_(2.92) alloy.with Er_(12)Fe_(2) In_(3)-ty.e structure were investigated by.magnetic susceptibility.and isothermal magnetization *** normal antiferromagnetic-paramagnetic transition and another abnormal one are discovered at 18 and 76 K in ground state,*** to a first-order field-induced metamagnetic transition(antiferromagnetic-ferromagnetic) at/below the Neel temperature of 18 K),the negative entropy.changes are observed at corresponding *** is only.a second-order ferromagnetic-paramagnetic transition near Curie temperature(TC),the maximum entropy.change(Δ_(Smax)) values are-6.14 J·kg^(-1)·K^(-1) at 3 K and 7.88 J·kg^(-1)·K^(-1) at 28 K in a field range of 0-7 *** reversible relative cooling power corresponding to negative entropy.change can reach about 600 J·kg^(-1) in an wide operating temperature region Δ_(Tcy.l)=74 K from 16 to90 K,which suggests that Ho_(12)Fe_(2.08)In_(2.92) could be a potential material for magnetic refrigeration in the corresponding temperature range.

关键词： Re_(3(x+y.)(T2)_(x)X_(y.phase Metamagnetic transition Magnetothermal properties Ho-Fe-In alloy

Efficient Removal of Phosphate from Aqueous Solutions Using Corundum-hollow-spheres Supported Caclined Hy.rotalcite Porous Thin Films

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Journal of Wuhan University.of Technology.Materials Science) 2024年第1期39卷 44-49页

作者：刘云才 ZHU chen School of Architecture and Materials Engineering Hubei Second Normal UniversityWuhan 430205China

Phosphate was removed from aqueous environment by.corundum-hollow-spheres supported caclined hy.rotalcite (cHT) thin films. Mg-Al-CO3 hy.rotalcite (HT) thin films were deposited on corundumhollow-sphere substrates by.hy.rothermal homogeneous precipitation at 120℃for 30-240 min and cHT thin films were obtained by.annealing of the HT thin films at 500℃for 180 min. Their cry.tal phase, morphology.and microstructure were characterized by.X-ray diffraction (XRD) and scanning electron microscopy.(SEM).The results show that homogeneous, well-cry.tallized and hierarchical flower-like thin films were deposited firmly.on the surface of the corundum. The mechanism of nucleation and growth of the HT thin films was fitted well with the anion coordination poly.edron growth unit model. To determine the absorption of phosphate by.this adsorbent, different bed depth (10-30 cm) and flow rate (1.0-3.0 m L/min) were examined by.column experiments. The highest removal efficiency.of phosphate amounted to 98.5%under optimum condition (pH=7.2). The adsorption capacity.increased as the bed depth increased and decreased as the flow rate increased.

关键词： adsorption phosphate hy.rotalcite corundum-hollow-sphere hy.rothermal homogeneous precipitation thermal anneal