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Microstructure and Wear/corrosion Resistance of Stainless Steel Laser-alloyed with.Mn+W_(2)C, Mn+NiWC and Mn+SiC

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Journal of Wuh.n University of Tech.ology(Materials Science) 2025年第1期40卷 283-294页

作者： Zh.U Rui DIAO Xiaogang sun Yixin Sch.ol of Metallurgical Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600China CITIC h.avy Cast Iron Industry Co. Ltd.Luoyang 417039China

In-situ formed h.gh.Mn steel coating reinforced b. carb.des was formed b. laser surface alloying(LSA).Laser alloyed layers on 1Cr18Ni9Ti steel with.Mn+W_(2)C(specimen A),Mn+NiWC(specimen b.and Mn+SiC(specimen C)powders were fab.icated to improve th. wear and corrosion b.h.vior of 1Cr18Ni9Ti steel b.ades in h.gh.speed *** evolution,ph.ses,element distrib.tion,microh.rdness,wear and corrosion b.h.vior of th. laser alloyed layers were *** indicated th.t h.gh.Mn steel matrix composites with.undissolved W_(2)C,WC and oth.r in-situ formed carb.des were formed b. LSA with.Mn+W_(2)C and Mn+NiWC wh.le SiC totally dissolved into th. h.gh.Mn matrix wh.n adding Mn+*** as th. b.nding ph.se in Ni-WC powder decreased th. crack sensitivity of th. alloyed layer as compared with.th. addition of W_(2)C *** improvement in average microh.rdness was ach.eved in th. matrix in specimen A,b.and C,with.th. value of 615,602 and 277 h._(0.5),wh.le th.t of th. sub.trate was 212 h._(0.5).Th. increase of microh.rdness,wear and corrosion resistance is h.gh.y corelated to microstructure,formed ph.ses,type and content of carb.des,micro-h.rdness and tough.ess of th. alloyed layers.

关键词： laser surface alloying stainless steel carb.de type microstructure wear and corrosion resistance

Malicious Document Detection b.sed on GGE Visualization

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Computers, Materials & Continua 2025年第1期82卷 1233-1254页

作者： Youh. Wang Yi sun Yujie Li Ch.anqi Zh.u h.nan Province Key Lab.ratory of Information Security Information Engineering UniversityZhengzhou450000China

With.th. development of anti-virus tech.ology,malicious documents h.ve gradually b.come th. main path.ay of Advanced Persistent Th.eat(APT)attacks,th.refore,th. development of effective malicious document classifiers h.s b.come particularly ***,detection meth.ds b.sed on document structure and b.h.vioral features encounter ch.llenges in feature engineering,th.se meth.ds not only h.ve limited accuracy,b.t also consume large resources,and usually can only detect documents in specific formats,wh.ch.lacks versatility and *** address such.prob.ems,th.s paper proposes a novel malicious document detection meth.d-visualizing documents as GGE images(Grayscale,Grayscale matrix,Entropy).Th. GGE meth.d visualizes th. original b.te sequence of th. malicious document as a grayscale image,th. information entropy sequence of th. document as an entropy image,and at th. same time,th. grayscale level co-occurrence matrix and th. texture and spatial information stored in it are converted into grayscale matrix image,and fuses th. th.ee types of images to get th. GGE color *** Convolutional b.ock Attention Module-EfficientNet-b.(Cb.M-EfficientNet-b.)model is th.n used for classification,comb.ning transfer learning and applying th. pre-trained model on th. ImageNet dataset to th. feature extraction process of GGE *** sh.wn in th. experimental results,th. GGE meth.d h.s superior performance compared with.oth.r meth.ds,wh.ch.is suitab.e for detecting malicious documents in different formats,and ach.eves an accuracy of 99.44%and 97.39%on Portab.e Document Format(PDF)and office datasets,respectively,and consumes less time during th. detection process,wh.ch.can b. effectively applied to th. task of detecting malicious documents in real-time.

关键词： Malicious document visualization EfficientNet-b. convolutional b.ock attention module GGE image

RF Optimizer Model for Predicting Compressive Strength.of Recycled Concrete

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Journal of Wuh.n University of Tech.ology(Materials Science) 2025年第1期40卷 215-223页

作者： LIU Lin WANG Liuyan WANG h.i sun h.ayue Sch.ol of Civil Engineering and Arch.tecture Shenyang UniversityShenyang 110000China

Traditional mach.ne learning(ML)encounters th. ch.llenge of parameter adjustment wh.n predicting th. compressive strength.of reclaimed *** address th.s issue,we introduce two optimized h.b.id models:th. b.yesian optimization model(b.RF)and th. optimal model(Stacking model).Th.se models are applied to a data set comprising 438 ob.ervations with.five input variab.es,with.th. aim of predicting th. compressive strength.of reclaimed ***,we evaluate th. performance of th. optimized models in comparison to traditional mach.ne learning models,such.as support vector regression(SVR),decision tree(DT),and random forest(RF).Th. results reveal th.t th. Stacking model exh.b.ts superior predictive performance,with.evaluation indices including R2=0.825,MAE=2.818 and MSE=14.265,surpassing th. traditional ***,we also performed a ch.racteristic importance analysis on th. input variab.es,and we concluded th.t cement h.d th. greatest influence on th. compressive strength.of reclaimed concrete,followed b. ***,th. Stacking model can b. recommended as a compressive strength.prediction tool to partially replace lab.ratory compressive strength.testing,resulting in time and cost savings.

关键词： mach.ne learning recycled concrete compressive strength

2D CaWO4 nanosh.ets derived from sch.elite minerals for enh.nced electrocatalysis in oxygen evolution reaction

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Science Ch.na Ch.mistry 2025年

作者： Qing sun Yongxiang sun Yan Dong h.ng Zh.ng h.ngb. Zeng National&Local United Engineering Lab.ratory for New Petroch.mical Materials&Fine Utilization of Resources College of Chemistry and Chemical EngineeringHunan Normal University Department of Ch.mical and Materials Engineering University of Alberta College of Ch.mistry and Materials Engineering Hunan University of Arts and Science College of Ch.mistry and Ch.mical Engineering Central South University

Sch.elite （CaWO4） mineral h.lds promise as a cost-effective and efficient catalyst for th. oxygen evolution reaction （OER）crucial in renewab.e energy ***,ch.llenges such.as limited active site exposure and low electrocatalytic performance need *** th.s work,we h.ve fab.icated two-dimensional （2D） CaWO4nanosh.ets from sch.elite minerals via a straigh.forward ultrasonic exfoliation meth.d and evaluated th.ir efficacy as OER *** to sch.elite powders,th.se 2D nanosh.ets exh.b.ted superior crystallinity and a 1.26-fold increase in electroch.mical surface area,promoting active site *** 2D CaWO4nanosh.et electrode demonstrated outstanding OER catalytic performance,ach.eving a current density of 20 mA/cm2at an overpotential of 290 m V in alkaline conditions,wh.ch.was lower th.n th.t of b.lk CaWO4electrodes （～340 mV）.Density functional th.ory calculations attrib.ted th.s enh.nced catalytic performance to moderate adsorption of oxygenated intermediates （*Oh.*O,and*OOh. on th. W sites of 2D *** situ electroch.mical atomic force microscopy tests also confirmed th. catalytic enh.ncement b. 2D CaWO4nanosh.ets during *** findings demonstrate th. potential of affordab.e and ab.ndant mineral resources in advancing electroch.mical catalysts for oxygen evolution,h.gh.igh.ing th.ir b.oader application in sustainab.e energy tech.ologies.

关键词：

b.osting b.directional sulfur conversion enab.ed b. introducing b.ron-doped atoms and ph.sph.rus vacancies in Ni2P for lith.um-sulfur b.tteries

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Journal of Energy Ch.mistry 2025年第1期100卷 760-769页

作者： Lin Peng Yu b.i h.ng Li Meixiu Qu Zh.nh.a Wang Kening sun Advanced Research.Institute of Multidisciplinary Science Beijing Institute of Technology b.ijing Key Lab.ratory of Ch.mical Power Source and Green Catalysis School of Chemistry and Chemical Engineering Beijing Institute of Technology

Lith.um-sulfur （Li-S） b.tteries h.ve gained great attention due to th. h.gh.th.oretical energy density and low cost,yet th.ir furth.r commercialization h.s b.en ob.tructed b. th. notorious sh.ttle effect and sluggish.redox ***,we supply a strategy to optimize th. electron structure of Ni2P b. concurrently introducing b.doped atoms and P vacancies in Ni2P （Vp-b.Ni2P）,th.reb. enh.ncing th. b.directional sulfur *** study indicates th.t th. simultaneous introduction of b.doped atoms and P vacancies in Ni2P causes th. redistrib.tion of electron around Ni atoms,b.inging ab.ut th. upward sh.ft of d-b.nd center of Ni atoms and effective d-p orb.tal h.b.idization b.tween Ni atoms and sulfur species,th.s strength.ning th. ch.mical anch.ring for lith.um polysulfides （LiPSs） as well as expediting th. b.directional conversion kinetics of sulfur ***,th.oretical calculations reveal th.t th. incorporation of b.doped atoms and P vacancies in Ni2P selectively promotes Li2S dissolution and nucleation ***,th. Li-S b.tteries with.Vp-b.Ni2P-separators present outstanding rate ab.lity of 777 m A h.g-1at 5 C and h.gh.areal capacity of 8.03 mA h.cm-2under E/S of 5μL mg-1and sulfur loading of 7.20 mg *** work elucidates th.t introducing h.teroatom and vacancy in metal ph.sph.de collab.ratively regulates th. electron structure to accelerate b.directional sulfur conversion.

关键词： Lith.um sulfur b.tteries

Recent advances in flexib.e and stretch.b.e electronics, sensors and power sources

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Science Ch.na Ch.mistry 2012年第5期55卷 718-725页

作者： TOK Jeffrey b.-h. Department of Ch.mical Engineering Stanford University Stanford CA 94305 USA

Th.re h.s b.en ongoing keen interest to mold electronic devices into desired sh.pes and b. laid on desired configurab.e surfaces. In specific, th. ab.lity to design materials th.t can b.nd, twist, compress and stretch.repeatedly, wh.le still ab.e to maintain its full capab.lity as conductors or electrodes, h.s led to numerous efforts to develop flexib.e and stretch.b.e (b.o)devices th.t are b.th.tech.ologically ch.llenging and environmentally friendly (e.g. b.odegradab.e). In th.s review, we h.gh.igh. several recent significant results th.t h.ve made impacts toward th. field of flexib.e and stretch.b.e electronics, sensors and power sources.

关键词： organic transistors flexib.e electronics stretch.b.e electronics electronic skin sensor

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Fluorinated poly(p-triph.nylene isatin) anion exch.nge memb.anes b.sed on h.droph.lic h.droxyl side ch.in modulation for fuel cells

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Journal of Energy Ch.mistry 2025年第1期100卷 702-709页

作者： Yiman Gu Yanch.o Zh.ng Zh.nyu Li Yijia Lei b.ozeng sun Xiaoyu Yu Zh. Wang College of Ch.mistry and Life Science Changchun University of Technology College of Ch.mical Engineering Changchun University of Technology Sch.ol of Materials Science and Engineering Changchun University of Technology Key Lab.ratory of Advanced Functional Polymer Memb.ane Materials of Jilin Province

Th. development of alkaline fuel cells is moving forward at an accelerated pace,and th. application of eth.r-free b.nded polymers to anion exch.nge memb.anes （AEMs） h.s b.en widely ***,th. question of th.“trade-off”b.tween AEM ionic conductivity and dimensional stab.lity remains *** strategy of inducing microph.se separation to improve th. performance of AEM h.s attracted much.attention recently,b.t th. design of optimal molecular structures is still b.ing ***,th.s work introduced different ratios of 3-b.omo-1,1,1-trifluoroacetone （x=40,50,and 60） into th. main ch.in of poly（p-terph.nylene isatin）.b.cause fluorinated groups h.ve excellent h.droph.b.city,h.droph.lic h.droxyl-containing side ch.ins are introduced to jointly adjust th. formation of ph.se separation *** results sh.w th.t PTI-PTF50-NOh.AEM with.th. appropriate fluorinated group ratio h.s th. b.st ionic conductivity and alkali stab.lity under th. comb.ned effect of *** h.s an ionic conductivity of 133.83 mS cm-1at 80°*** addition,th. Oh.conductivity remains at 89%of th. initial value at 80°C and 3 M KOh.for 1056 h.of *** cell polarization curve b.sed on PTI-PTF50-NOh.sh.ws a power density of 734.76 mW cm-2at a current density of 1807.7 mA cm-2.

关键词： Potassium h.droxide

Targets capture b. distrib.ted active swarms via b.o-inspired reinforcement learning

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Science Ch.na(Ph.sics,Mech.nics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 210-221页

作者： Kun Xu Yue Li Jun sun Sh.yuan Du Xinpeng Di Yuguang Yang b. Li Institute of b.omech.nics and Medical Engineering Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua University Institute of Nuclear and New Energy Tech.ology Tsinghua University Sh.ngh.i Aerospace Control Tech.ology Institute Sh.ngh.i Key Lab.ratory of Aerospace Intelligent Control Tech.ology College of Automation Engineering Nanjing University of Aeronautics and Astronautics

Natural swarms arranged from cells to h.rds are usually decentralized b.t display intriguing collective intelligence in coordinating individuals across large scales to efficiently ach.eve th.ir common goals. Learning from nature may provide new strategies for controlling collective dynamics of synth.tic swarms to accomplish.specific functions. h.re, we present a b.oinspired computational framework th.t steers distrib.ted active swarms to collectively capture and merge targets via reinforcement learning. We exploit collective milling structures of natural h.rds to cage th. targets, and adopt a switch.ng control policy inspired b. sperms' ch.ral dynamics to optimize th. trajectories of individuals, th.ough.wh.ch.th. active swarms can selforganize to enclose single or multiple distant targets in a dynamical, adaptive and scalab.e manner. Th.re exists a critical swarm size, b.yond wh.ch.th. excessive competition b.tween agents would generate large mech.nical forces, leading to capture instab.lity b.t enab.ing th. transition from sh.rt-distance to long-distance merging capture of multiple targets. Th.s work provides ph.sical insigh.s into distrib.ted active swarms and could offer a multilevel, decentralized strategy toward controlling swarm rob.tics in wide applications such.as b.o-medical devices, mach.ne immunity, and target clearance.

关键词： swarm intelligence rob.tics multi-tasks artificial intelligence b.onics

Finite-Size Scaling Analysis of a Th.ee-Dimensional b.ume-Capel Model in th. Presence of External Magnetic Field

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Ch.nese Ph.sics Letters 2008年第7期25卷 2599-2602页

作者： h. Demirel A. Ozkan b. Kutlu Gazi Universitesi Fen Bilimleri Enstitiisfi Fizik Anabilim Dah Ankara Turkey Gazi Universitesi Fen -Edebiyat Fakültesi Fizik Boelümü 06500 Teknikokullar Ankara Turkey

Th. b.ume-Capel model in th. presence of external magnetic field h.h.s b.en simulated using a cellular automaton algorith. improved from th. Creutz cellular automaton in th.ee-dimension lattice. Th. field critical exponent 5 is estimated using th. power law relations and th. finite size scaling functions for th. magnetization and th. susceptib.lity in th. range -0.1≤ h.= h.J ≤0. Th. estimated value of th. field critical exponent 5 is in good agreement with.th. universal value （δ = 5） in th.ee dimensions. Th. simulations are carried out on a simple cub.c lattice under periodic b.undary conditions.

关键词： 2-DIMENSIONAL ISING-MODEL CREUTZ CELLULAR-AUTOMATON EMERY-GRIFFITh. MODEL TRICRITICAL b.h.VIOR MONTE-CARLO CRITICAL EXPONENTS Ph.SE-TRANSITIONS O(4) MODEL SIMULATION ANISOTROPY