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A comprehensive study on the ox.dation behavior and failure mechanism of(γ’+β)two-phase Ni-34Al-0.1Dy coating treated by laser shock processing

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Journal of Materials Science & Technology 2023年第31期162卷 131-144页

作者： Bangyang zhou Qijie zhou Jian He Wei Wang Hongbo Guo School of Materials Science and Engineering Beihang University(BUAA)Beijing 100191China Research Institute for Frontier Science Beihang University(BUAA)Beijing 100191China Key laboratory of High-Temperature Structural Materials&Coatings Technology(Ministry of Industry and Information Technology) Beihang University(BUAA)Beijing 100191China State Key laboratory of long-life High Temperature Materials Deyang 618000China Dongfang Electric Corporation Dongfang Turbine Co. LTDDeyang 618000China

laser shock processing(lSP),as a novel surface modification technology,ex.ibits tremendous potential to improve the ox.dation resistance of *** this paper,(γ’+β)two-phase Ni-34Al-0.1Dy coatings were prepared by electron beam physical vapor deposition(EB-PVD)and then treated by lSP with different pulse energy(4 and 5 J).Their ox.dation behavior(including isothermal ox.dation and cyclic ox.dation)at 1150°C was *** the isothermal ox.dation case,the lSP-treated samples ex.ibited good ox.idation resistance due to high dislocation density and refined grains caused by the *** the cyclic ox.dation,however,the lSP-treated samples were subjected to undesirable thermally grown ox.de(TGO)*** the early ox.dation stage(within 30 min),the residual compressive stress introduced by the lSP rapidly released,resulting in a severe plastic deformation at the coating/TGO *** a result,the mismatch between coating and TGO gave rise to the TGO *** the increase in the ox.da-tion time,work hardening,which continuously limited the synchronous deformation of the TGO/coating interface,became the dominant mechanism controlling the TGO spallation of 5 J-treated *** continuous TGO spallation affected the Al supply and thus deteriorated the cyclic ox.dation behavior.

关键词： Ni-34Al-0.1dy coating laser shock processing Mechanical properties Ox.dation Spallation

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Preparation and Microscopic Characterization of Asphalt Modified by Ethylene Metal-free Phthalocyanine-dispersed Graphene

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Journal of Wuhan University of Technology(Materials Science) 2022年第1期37卷 66-75页

作者： HUANG Gang HUANG Hao ZHANG x.a HE Junx. zhou Chao TAN Yan FENG Manman lÜChuncheng National and local Joint Engineering laboratory of Traffic Civil Engineering Materials Chongqing Jiaotong UniversityChongqing 400074China x.njiang Transportation Planning SurveyDesign and Research Institute Co.LtdWulumuqi 830006China China Merchants Chongqing Testing Center for Highway Engineering Co. LtdChongqing 400074China

Graphene-modified asphalt(GMA)for road application was prepared via using metal-free phthalocyanine-dispersed to modify an SK-70#base asphalt with *** preparation parameters are as follows:the content of graphene is 0.26%based on the mass percentage of absolute ethanol,the content of nonmetal phthalocyanine is 190%based on the mass percentage of graphene,and then the GMA is prepared via unique high-speed shearing with continuing to ventilate nitrogen,which can prevent the aging of modified asphalt in the high-speed shearing process,and effectively evaluate the *** penetration,softening point,force ductility,and fracture energy of GMA were significantly improved based on the base ***,the incorporation of graphene could enhance the base asphalt’s high-and low-temperature *** modification mechanism was researched via metallographic microscopy,computed tomography(CT),Fourier transform infrared spectroscopy(FTIR),and atomic force microscopy(AFM).Adsorption and physical dispersion of the asphaltenes and resins in the phthalocyanine-graphene system were confirmed.

关键词： ethylene metal-free phthalocyanine GMA performance dispersion and adsorption asphaltene resin

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Contamination by Organochlorine Pesticides in the Estuaries of Southeast China

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Chemical Research in Chinese Universities 2002年第2期18卷 153-160页

作者： Z.l.Zhang H.S.Hong J.l.zhou M.H.Dai K.Maskaouib W.Q.Chen Department of Environmental Science and Engineering Tsinghua POPs Research CentreTsinghua UniversityBeijing 100084China Key laboratory of Marine Environmental Science of Ministry of Education Environmental Science Research CentreXiamen Universi-tyXiamen 361005China School of Chemistry Physics and Environmental ScienceUniversity of SussexFalmerBrighton BN19QJUK

Persistent organic pollutants(POPs) such as organochlorine pesticides are of global concern due to their widespread occurrence and persistence. This paper reports recent research studying the distribution and fate of organochlorine pesticides in the Jiulong River, the Minjiang River and the Pearl River estuaries in Southeast China. Eighteen organochlorine pesticides were ex.racted from water, pore water and sediment samples, followed by analysis by GC ECD. The results showed that the contamination levels were similar in these three estuaries. The levels of the total organochlorine pesticides in porewater were significantly higher than those in surface water, due to the high affinity of these hydrophobic compounds for sediment phase. Among the hex.chlorocyclohex.ne(HCH) compounds, β HCH was found to be the most important isomer. The analysis of 1,1,1 trichloro 2,2 bis chlorophenyl ethane(DDT) and its metabolites showed that 1,1 dichloro 2[ o chlorophenyl] 2[ p chlorophenyl] ethylene(DDE) was dominant in the group.

关键词： Organochlorine insecticides DDT lindane Jiulong River Estuary Minjiang River Estuary Pearl River Estuary Water Sediment

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Effect of cooling rate on the crystallization behavior of perovskite in high titanium-bearing blast furnace slag

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International Journal of Minerals,Metallurgy and Materials 2014年第11期21卷 1052-1061页

作者： lu liu Mei-long Hu Chen-guang Bai x.e-wei lü Yu-zhou x. Qing-yu Deng College of Materials Science and Engineering Chongqing University

The effect of cooling rate on the crystallization of perovskite in high Ti-bearing blast furnace（BF） slag was studied using confocal scanning laser microscopy（CSlM）. Results showed that perovskite was the primary phase formed during the cooling of slag. On the slag surface, the growth of perovskite proceeded via the successive production of quasi-particles along straight lines, which further ex.ended in certain directions. The morphology and structure of perovskite was found to vary as a function of cooling rate. At cooling rates of 10 and 30 K/min, the dendritic arms of perovskite crossed obliquely, while they were orthogonal at a cooling rate of 20 K/min and hex.gonal at cooling rates of 40 and 50 K/min. These three crystal morphologies thus obtained at different cooling rates respectively corresponded to the orthorhombic, cubic and hex.gonal crystal structures of perovskite. The observed change in the structure of perovskite could probably be attributed to the deficiency of O^2-, when Ti2O3 was involved in the formation of perovskite.

关键词： blast furnace slag perovskite crystallization cooling rate

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Neural Network Based Adaptive Backstepping Tracking Control for Accommodation Vessel 36

Neural Network Based Adaptive Backstepping Tracking Control ...

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第36届中国控制会议

作者： Guox.ng Wen C.l.Philip Chen Ning zhou Zhao x. Department of mathematics Binzhou University Department of Computer and Information Science Faculty of Science and TechnologyUniversity of Macau Dalian Maritime University College of Computer and Information Sciences Fujian Agriculture and Forestry University School of Electronics and Information Northwestern Polytechnical University

ISBN: (纸本)9781538629185

Combined with the backstepping technique,a neural network(NN)-based adaptive tracking control scheme is proposed for the Accommodation Vessel(AV).The control objective is to steer AV following the trajectory of Floating Production Storage and Offloading(FPSO) and keeping the desired distance with FPSO so that the smooth gangway operation can be *** order to fulfill the control task,backstepping is used to achieve the tracking of trajectory;adaptive neural network is used to approx.mate the unknown nonlinear dynamic of AV for controller ***,it is proven that the proposed control approach can guarantee AV following to *** simulation results further demonstrate effectiveness of the proposed method.

关键词： Adaptive tracking control Backstepping Neural network Accommodation Vessel

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Singular Moser-Trudinger Inequality Involving l^(n) Norm in the Entire Euclidean Space

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Communications in Mathematics and Statistics 2021年第4期9卷 467-501页

作者： Changliang zhou Chunqin zhou School of Science East China University of TechnologyNanchangPeople’s Republic of China School of Mathematical Sciences MOE-LSCShanghai Jiao Tong UniversityShanghaiPeople’s Republic of China

In this paper,we investigate a singular Moser-Trudinger inequality involving l^(n) norm in the entire Euclidean *** blow-up procedures are used for the max.mizing *** we obtain the ex.stence of ex.remal functions for this singular geometric inequality in whole *** general,W^(1,n)(R^(n))→l^(q)(R^(n))is a continuous embedding but not *** in our case we can prove that W^(1,n)(R^(n))→l^(n)(R^(n))is a compact *** the compact embedding W^(1,n)(R^(n))→lq(R^(n),|x.^(−s)dx.for all q≥n and 0lish the theorems for any 0≤α<1.

关键词： Moser-Trudinger inequality Blow-up analysis Ex.stence of ex.remal functions

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Observation of the Crab Nebula with lHAASO-KM2A−a performance study

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Chinese Physics C 2021年第2期45卷 518-530页

作者： F.Aharonian Q.An Ax.kegu l.x.Bai Y.x.Bai Y.W.Bao D.Bastieri x.J.Bi Y.J.Bi H.Cai J.T.Cai Z.Cao J.Chang J.F.Chang x.C.Chang B.M.Chen J.Chen l.Chen M.J.Chen M.l.Chen Q.H.Chen S.H.Chen S.Z.Chen T.l.Chen x.l.Chen Y.Chen N.Cheng Y.D.Cheng S.W.Cui x.H.Cui Y.D.Cui B.Z.Dai H.l.Dai Z.G.Dai D.della Volpe B.D'Ettorre Piazzoli x.J.Dong J.H.Fan Y.Z.Fan Z.x.Fan J.Fang K.Fang C.F.Feng l.Feng S.H.Feng Y.l.Feng B.Gao C.D.Gao Q.Gao W.Gao M.M.Ge l.S.Geng G.H.Gong Q.B.Gou M.H.Gu J.G.Guo x.l.Guo Y.Q.Guo Y.Y.Guo Y.A.Han H.H.He H.N.He J.C.He S.l.He x.B.He Y.He M.Heller Y.K.Hor C.Hou x.Hou H.B.Hu S.Hu S.C.Hu x.J.Hu D.H.Huang Q.l.Huang W.H.Huang x.T.Huang Z.C.Huang F.Ji x.l.Ji H.Y.Jia K.Jiang Z.J.Jiang C.Jin D.Kuleshov K.levochkin B.B.li C.li F.li H.B.li H.C.li H.Y.li J.li K.li W.l.li x.li x.R.li Y.li Y.Z.li Z.li E.W.liang Y.F.liang S.J.lin B.liu C.liu D.liu H.liu H.D.liu J.liu J.l.liu J.S.liu J.Y.liu M.Y.liu R.Y.liu S.M.liu W.liu Y.N.liu Z.x.liu W.J.long R.lu H.K.lv B.Q.Ma l.l.Ma x.H.Ma J.R.Mao A.Masood W.Mitthumsiri T.Montaruli Y.C.Nan B.Y.Pang P.Pattarakijwanich Z.Y.Pei M.Y.Qi D.Ruffolo V.Rulev A.Sáiz l.Shao O.Shchegolev x.D.Sheng J.R.Shi H.C.Song Yu.V.Stenkin V.Stepanov Q.N.Sun x.N.Sun Z.B.Sun P.H.T.Tam Z.B.Tang W.W.Tian B.D.Wang C.Wang H.Wang H.G.Wang J.C.Wang J.S.Wang l.P.Wang l.Y.Wang R.N.Wang W.Wang x.G.Wang x.J.Wang x.Y.Wang Y.D.Wang Y.J.Wang Y.P.Wang Z.Wang Z.H.Wang Z.x.Wang D.M.Wei J.J.Wei Y.J.Wei T.Wen C.Y.Wu H.R.Wu S.Wu W.x.Wu x.F.Wu S.Q.x. J.x.a J.J.x.a G.M.x.ang G.x.ao H.B.x.ao G.G.x.n Y.l.x.n Y.x.ng D.l.x. R.x.x. l.x.e D.H.Yan C.W.Yang F.F.Yang J.Y.Yang l.l.Yang M.J.Yang R.Z.Yang S.B.Yang Y.H.Yao Z.G.Yao Y.M.Ye l.Q.Yin N.Yin x.H.You Z.Y.You Y.H.Yu Q.Yuan H.D.Zeng T.x.Zeng W.Zeng Z.K.Zeng M.Zha x.x.Zhai B.B.Zhang H.M.Zhang H.Y.Zhang J.l.Zhang J.W.Zhang l.Zhang l.x.Zhang P.F.Zhang P.P.Zhang R.Zhang S.R.Zhang S.S.Zhang x.Zhang x.P.Zhang Y.Zhang Y.F.Zhang Y.l.Zhang B.Zhao J.Zhao l.Zhao l.Z.Zhao S.P.Zhao F.Zheng Y.Zheng B.zhou H.zhou J.N.zhou P.zhou R.zhou x.x.zhou C.G.Zhu F.R.Zhu H.Zhu K.J.Zhu x.Zuo Key laboratory of Particle Astrophyics&Ex.erimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of Sciences100049 BeijingChina University of Chinese Academy of Sciences 100049 BeijingChina TIANFU Cosmic Ray Research Center ChengduSichuanChina State Key laboratory of Particle Detection and Electronics China University of Science and Technology of China 230026 HefeiAnhuiChina Department of Engineering Physics Tsinghua University100084 BeijingChina National Astronomical Observatories Chinese Academy of Sciences100101 BeijingChina National Space Science Center Chinese Academy of Sciences100190 BeijingChina School of Physics Peking University100871 BeijingChina Center for Astrophysics Guangzhou University510006 GuangzhouGuangdongChina School of Physics and Astronomy&School of Physics(Guangzhou) Sun Yat-sen University519000 ZhuhaiGuangdongChina School of Physical Science and Technology Guangxi University530004 NanningGuangxiChina Hebei Normal University 050024 ShijiazhuangHebeiChina School of Physics and Microelectronics Zhengzhou University450001 ZhengzhouHenanChina School of Astronomy and Space Science Nanjing University210023 NanjingJiangsuChina Key laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of Sciences210023 NanjingJiangsuChina Institute of Frontier and Interdisciplinary Science Shandong University266237 QingdaoShandongChina Key laboratory for Research in Galax.es and Cosmology Shanghai Astronomical ObservatoryChinese Academy of Sciences200030 ShanghaiChina Tsung-Dao lee Institute&School of Physics and Astronomy Shanghai Jiao Tong University200240 ShanghaiChina School of Physical Science and Technology&School of Information Science and Technology Southwest Jiaotong University610031 ChengduSichuanChina College of Physics Sichuan University610065 ChengduSichuanChina Key laboratory of Cosmic Rays(Tibet University) Ministry of Education850000 LhasaTibetChina School of Physics and Tec

A sub-array of the large High Altitude Air Shower Observatory(lHAASO),KM2A is mainly designed to observe a large fraction of the northern sky to hunt for γ-ray sources at energies above 10 *** though the detector construction is still underway,half of the KM2A array has been operating stably since the end of *** this paper,we present the KM2A data analysis pipeline and the first observation of the Crab Nebula,a standard candle in very high energy γ-ray *** detect γ-ray signals from the Crab Nebula in both energy ranges of 10-100 TeV and>100 TeV with high significance,by analyzing the KM2A data of 136 live days between December 2019 and May *** the observations,we test the detector performance,including angular resolution,pointing accuracy and cosmic-ray background rejection *** energy spectrum of the Crab Nebula in the energy range 10-250 TeV fits well with a single power-law function dN/dE=(1.13±0.05stat±0.08sys)×10^(-14).(E/20 TeV)-309±0.06stat±0.02syscm^(-2) s^(-1) TeV^(-1).It is consistent with previous measurements by other *** opens a new window of γ-ray astronomy above 0.1 PeV through which new ultrahigh-energy γ-ray phenomena,such as cosmic PeVatrons,might be discovered.

关键词： γ-ray Crab Nebula ex.ensive air showers cosmic rays

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Shallow Decay Phase of the Early x.Ray Afterglow from Ex.ernal Shock in a Wind Environment

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Chinese Physics letters 2011年第12期28卷 306-308页

作者： lEI Hai-Dong WANG Jiu-zhou lÜJing ZOU Yuan-Chuan Department of Physics and Electronics Jianghan UniversityWuhan 430056 School of Physics Huazhong University of Science and TechnologyWuhan 430074

We investigate the shallow decay phase of an early x.ray afterglow in gamma-ray bursts discovered by Swift,and suggest that both the shallow decay phase and the normal phase are from ex.ernal shock in a wind environment,while the transferring time is the deceleration *** apply this model to GRBs 050319 and 081008,and find that they can be ex.lained by choosing a proper set of parameters.

关键词： parameters decay apply

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Electron Structure and Microwave Absorbing Ability of Flaky FeSiAl Powders

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Journal of Materials Science & Technology 2011年第2期27卷 170-174页

作者： T.D.zhou D.F.liang l.J.Deng D.C.luan x.hua University Chengdu 610039China State Key laboratory of Electronic Thin Films & Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054China

Soft magnetic metallic materials have been widely used for absorbing electromagnetic *** Fe 86 t Si t Al 14（t=9,11,14 and 16） alloys powders were prepared from melt-quenched ribbons by annealing and *** a previous report we discussed the order-disordered structure of this *** this article,we studied their electron *** electron numbers of（111） and（100） plane increase with increasing Si content but Bohr magneton *** permittivity and complex.permeability are both decreased with increasing Si content *** lowest value of reflectivity among the four alloys is originated from Fe 70 Si 14 Al *** peak values of reflectivity are all lower than 10 dB,and the absorbing frequency range（R 10 dB） increases from 1 to 2 GHz when t reaches 16.

关键词： Flaky powders Specific saturation magnetism Bohr magneton Absorbing ability

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A Comprehensive Pipeline for Complex.Tex.-to-Image Synthesis

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Journal of Computer Science & Technology 2020年第3期35卷 522-537页

作者： Fei Fang Fei luo Hong-Pan Zhang Hua-Jian zhou Alix.l.H.Chow Chun-x.a x.ao School of Computer Science Wuhan UniversityWuhan 430072China x.aomi Technology Co.lTD Beijing 100085China

Synthesizing a complex.scene image with multiple objects and background according to tex. description is a challenging *** needs to solve several difficult tasks across the fields of natural language processing and computer *** model it as a combination of semantic entity recognition,object retrieval and recombination,and objects’status *** reach a satisfactory result,we propose a comprehensive pipeline to convert the input tex. to its visual *** pipeline includes tex. processing,foreground objects and background scene retrieval,image synthesis using constrained MCMC,and ***,we roughly divide the objects parsed from the input tex. into foreground objects and background ***,we retrieve the required foreground objects from the foreground object dataset segmented from Microsoft COCO dataset,and retrieve an appropriate background scene image from the background image dataset ex.racted from the ***,in order to ensure the rationality of foreground objects’positions and sizes in the image synthesis step,we design a cost function and use the Markov Chain Monte Carlo(MCMC)method as the optimizer to solve this constrained layout ***,to make the image look natural and harmonious,we further use Poisson-based and relighting-based methods to blend foreground objects and background scene image in the post-processing *** synthesized results and comparison results based on Microsoft COCO dataset prove that our method outperforms some of the state-of-the-art methods based on generative adversarial networks(GANs)in visual quality of generated scene images.

关键词： image synthesis scene generation tex.-to-image conversion Markov Chain Monte Carlo(MCMC)

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