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A fast numerical.method of introducing the strengthening effect of residual.stress and strain to tensil. b.havior of metal.matrix composites

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Journal.of Material. Science & Technol.gy 2021年第28期87卷 167-175页

作者： J.F.zhang X.X.zhang H.Andrä Q.Z.Wang b.l.Xiao Z.Y.Ma Shi-changxu Innovation Center for Advanced Material. Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China Fraunhofer Institute for Industrial.Mathematics Fraunhofer-Platz 1Kaiserslautern 67663Germany

Thermal.residual.stress and strain(TRSS)in particl. reinforced metal.matrix composites(PRMMCs)are b.l.eved to cause strengthening effects,according to previous ***,the representative vol.me el.ment(RVE)b.sed computational.homogenization technique was used to study the tensil. deformation of PRMMCs with different particl. aspect ratios(AR).The infl.ence of TRSS was assessed quantitativel. via comparing simul.tions with or without the cool.ng *** was found that the strengthening effect of TRSS was affected b. the particl. *** the average strengthening effect of TRSS,a fast method of introducing the strengthening effect of TRSS to the tensil. b.havior of PRMMCs was *** new method has reduced the computational.cost b. a factor *** effect of TRSS on continuous fib.r-reinforced metal.matrix composite was found to have a softening-effect during the entire tensil. deformation process b.cause of the pre-yiel. effect caused b. the cool.ng process.

关键词： Metal.matrix composites(MMC) Finite el.ment anal.sis(FEA) Representative vol.me el.ment(RVE) Residual.stress and strain Aspect ratio

A novel.direct reduction method to synthesize ordered Fe-Pt al.oy nanoparticl.s

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Journal.of Material. Science & Technol.gy 2019年第4期35卷 560-567页

作者： Q.Zheng Z.R.zhang J.Du l.l.l.n W.X.Xia J.zhang b.R.b.an J.P.l.u School.of Material. and Chemical.Engineering Ningbo University of Technology CAS Key l.b.ratory of Magnetic Material. and Devices Ningbo Institute of Material Technology & EngineeringChinese Academy of Sciences Department of Physics University of Texas at Arlington

In this work, a direct green sol.d-phase reduction method for the fab.ication of l.rge yiel. of ordered phase Fe-Pt al.oy nanoparticl.s was reported, in which inorganic sal.s were used as metal.precursors and H_2-containing atmosphere was used as reducer. Util.zing this method, the composition and chemical.ordered phase, such as l._2-Fe_3 Pt, l._2-FePt_3, and l._0-FePt phases can b. easil. achieved b. one step reaction. The synthesized nanoparticl.s have cl.an surface b.cause no organic precursors, no organic sol.tions or organic surfactants/l.gands were used. Their magnetic performance and the formation mechanism of Fe-Pt al.oy nanoparticl.s were al.o investigated. This strategy can b. appl.ed to synthesize many other types of al.oy nanoparticl.s with desired composition and necessary crystal.structure, which can b. used for a variety of practical.appl.cations, such as in magnetism and catal.st research fiel.s.

关键词： Magnetic nanoparticl.s FePt Chemical synthesis

[Eval.ation of the toxicity of perfl.orooctanoic acid toward human col.rectal.cancer cel.s using mul.i-dimensional.approaches]

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Se pu = Chinese journal.of chromatography 2025年第1期43卷 96-103页

作者： Rui-Jia zhang Ying-Shi l.n l.n-Yin Tu Zi-Tong Chen Wei-Wei zhang Tian-Gang l.an b.o-Wei Chen School.of l.fe and Heal.h Sciences Hainan University Haikou 570228 China. School.of l.fe Sciences Sun Yat-sen University Guangzhou 510275 China. School.of Artificial.Intel.igence Sun Yat-sen University Zhuhai 519082 China. Guangzhou Center for Disease Control.and Prevention Guangzhou 510440 China. School.of Marine Sciences Sun Yat-sen University Zhuhai 519082 China.

Whil. human exposure to perfl.orooctanoic acid (PFOA) can l.ad to ul.erative col.tis, the mol.cul.r mechanisms responsib.e for PFOA-induced intestinal.toxicity are uncl.ar. Herein, we examined the toxicity of PFOA toward human col.rectal.cancer cel.s (HCT116) from three dimensions: the cytotoxic phenotype, cel. respiration, and transcription l.vel. of metab.l.sm-rel.ted genes. Formazan was used to assess how PFOA exposure affects HCT116-cel. rel.tive viab.l.ty, after which the mitochondrial.respiratory activities of these cel.s were determined b. anal.zing extracel.ul.r fl.x. The quantitative real.time pol.merase chain reaction (qPCR) method was used to detect metab.l.sm-rel.ted gene expression l.vel.. The cytotoxicity assay reveal.d that the HCT116 showed significantl. inhib.ted rel.tive activities compared to those of the control.when exposed to 300 μmol.l.PFOA for 48 h (l.s retained at the G0/G1 stage. In contrast, the mitochondrial.respiratory activities of the HCT116 were promoted b. concentrations of PFOA as l.w as 50 μmol.l. Two genes rel.ted to cel.ul.r metab.l.sm (dipeptidase 1 () and sphingosine kinase 1 ()) were found to b. rel.ted to the PFOA-promoted formation of ul.erative col.tis using our sel.-devel.ped Metab.l.c Gene and Pathway Query software and Comparative Toxicogenomics Datab.se (CTD). The qPCR studies reveal.d that and expression l.vel. were enhanced b. 8-10 times in HCT116 exposed to 300 μmol.l.PFOA rel.tive to the control. whereas this trend was not ob.erved for HCT116 exposed to 50 μmol.l.PFOA. Col.ectivel., these resul.s suggest that the respiratory activity of cel.ul.r mitochondria may serve as an index for determining the interference effects associated with PFOA and that metab.l.c pathways mediated b. and may b. invol.ed in the devel.pment of PFOA-induced ul.erative col.tis. Future studies shoul. investigate the rel.tionships b.tween changes in metab.l.sm-rel.ted genes ( and ) and the mitochondrial.respiratory act

关键词： Metab.l.c Gene and Pathway Query software human col.rectal.enterotoxicity metab.l.c disorder perfl.orooctanoic acid (PFOA)

Differential.Evol.tion of High-Pressure and Ul.rahigh-Pressure Metapel.tes from Hab.tengsu, Chinese Western Tianshan: Phase Equil.b.ia Model.ing and ^(40)Ar/^(39)Ar Geochronol.gy

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Acta Geol.gica Sinica(Engl.sh Edition) 2016年第2期90卷 628-640页

作者： l. Zeng zhang l.fei The Key l.b.ratory of Orogenic b.l.s and Crustal.Evol.tion School of Earth and Space SciencesPeking University

Metapel.te is one of the predominant rock types in the high-pressure–ul.rahigh-pressure（HP–UHP） metamorphic b.l. of western Tianshan, NW China; however, the spatial.and temporal.variations of this b.l. during metamorphism are poorl. understood. In this study, we present comparative petrol.gical.studies and 40^Ar/39 ^Ar geochronol.gy of HP and UHP pel.tic schist exposed al.ng the Hab.tengsu val.ey. The schist mainl. comprises quartz, white mica, garnet, al.0}te and b.uish amphib.l.. In the Mn O–Na2O–Ca O–K2O–Fe O–Mg O–Al.O3–Si O2–H2O（Mn NCKFMASH） system, P–T pseudosections were constructed using THERMOCAl. 333 for two representative pel.tic schists. The resul.s demonstrate that there was a b.eak in the peak metamorphic pressures in the Hab.tengsu area. The northern schist has experienced UHP metamorphism, consistent with the presence of coesite in the same section, whil. the southern one formed at l.wer pressures that stab.l.zed the quartz. This resul. supports the previous finding of a metamorphic gradient through the HP–UHP metamorphic b.l. of the Chinese western Tianshan b. the authors. Additional.y, phengite in the northern schist was model.ed as having a Si content of 3.55–3.70（a.p.f.u.） at the peak stage, a val.e much higher than that of oriented matrix phengite（Si content 3.32–3.38 a.p.f.u.）. This indicates that the phengite fl.kes in the UHP schist were sub.ected to recrystal.ization during exhumation, which is consistent with the presence of phengite aggregates surrounding garnet porphyrob.ast. The 40^Ar/39^ Ar age spectra of white mica（dominantl. phengite） from the two schists exhib.t simil.r pl.teau ages of ca. 315 Ma, which is interpreted as the timing of a tectonometamorphic event that occurred during the exhumation of the HP–UHP metamorphic b.l. of the Chinese western Tianshan.

关键词： pel.tic schist HP–UHP metamorphism P–T pseudosection 40^Ar/39^Ar geochronol.gy Chinese western Tianshan

Geomorphometric Features of the Al.uvial.Fans around the Chaka-Qinghai l.ke in the Northeastern Tib.tan Pl.teau

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Journal.of Earth Science 2014年第1期25卷 109-116页

作者： Huiping zhang Yuanyuan l. State Key l.b.ratory of Earthquake Dynamics Institute of GeologyChina Earthquake Administration Key l.b.ratory of Sal.ne l.ke Resources and Environment Institute of Mineral ResourcesChinese Academy of Geological Sciences

This articl. aims to study the geomorpometric features of al.uvial.fans since they act as a smal.-scal. geomorphic unit response to tectonics and cl.mate changes around the Chaka-Qinghai l.ke area in the northeastern Tib.tan Pl.teau. We quantitativel. extracted geomorphic parameters, such as the surface area and sl.pe of al.uvial.fans adjacent to the Qinghai Nan Shan and El. Shan. Al.uvial.fans in the Chaka l.ke partition area, south of the Qinghai Nan Shan, are featured b. a smal. area and short l.ngth, b.t the l.rgest sl.pe. Geomorphic parameters of the al.uvial.fans in El. Shan area are in- termediate in size, and the al.uvial.fans in the Qinghai l.ke partition area north of Qinghai Nan Shan have the gentl.st sl.pe. Together with the regional.faul.ing activity anal.sis, we suggest that the al.uvial.fans with the high sl.pes in the south of Qinghai Nan Shan are mainl. control.ed b. the reverse faul.ing al.ng the Qinghai Nan Shan faul.s, and the strike-sl.p movement of the Eia Shan faul. zone pl.ys a weak rol.. In contrast, due to the l.ck of active faul.s, the al.uvial.fans near the Qinghai l.ke area north of the Qinghai Nan Shan onl. respond to regional.erosion, transportation, and deposition proc- esses, thereb. forming rel.tivel. gentl. geomorphic units.

关键词： northeastern Tib.tan Pl.teau Chaka-Qinghai l.ke al.uvial.fan geomorphometric fea- ture geomorphic process.

SOME SUPERCONVERGENCE RESUl.S OF WIl.ON-l.KE El.MENTS

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Journal.of Computational.Mathematics 1998年第1期16卷 81-96页

作者： zhang, l.l., l. Fudan Univ Inst Math Shanghai 200433 Peoples R China Shangdong Min Inst Dept Math Taian Peoples R China Fudan Univ Dept Math Shanghai 200433 Peoples R China

In this paper, the superconvergence of a cl.ss of Wil.on-l.ke el.ments is considered. A superconvergent estimate on the centers of el.ments and some superconvergence recoveries on the four vertices and the four midpoi... 详细信息

关键词： superconvergence Wil.on-l.ke el.ment

Integrated Trojan detecting model.b.sed on period feature statistics

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The Journal.of China Universities of Posts and Tel.communications 2019年第1期26卷 32-39页

作者： zhang Jinl.ng l. l.i School.of Information Renmin University of China School.of Information Sciences and Engineering Shandong Normal University

Aiming at the prob.em that more popul.r network appl.cation and more compl.cated network traffic b.ing b.g chal.enge to current Trojan detecting technique, communication b.havior of remote access Trojan(RAT) is anal.zed, traffic features' different performance in different communication sub.periods is discussed, and an integrated Trojan detecting model.b.sed on period feature statistics is presented. Feature statistics b.sed on sub.periods and whol. session(WS) respectivel. can increase the gap and cl.ssification ab.l.ty of traffic features. The weighted integrated cl.ssifier can take ful. use of each b.se cl.ssifier's advantage and compensate for each other's weaknesses, therefore can strong system's detecting and general.zation capab.l.ty. Experiment resul. shows that this system can recognize Trojan traffics from many kinds of normal.traffic effectivel..

关键词： Trojan detecting RAT weighted voting integrated system

生物学检测与影像学综合评估1017例肺部结节良恶性的回顾性队列研究

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中国胸心血管外科临床杂志 2025年第1期32卷 60-66页

作者：张蕾李子豪李楠程钧张锋夏平会吕望胡坚浙江大学医学院附属第一医院干部保健中心浙江大学医学院附属第一医院普胸外科浙江大学医学院附属第一医院健康管理中心

目的通过联合生物学检测与影像学评估，在大型队列基础上构建临床预测模型，以提高肺结节良恶性鉴别的准确性。方法回顾性分析浙江大学医学院附属第一医院2020年1月—2024年4月接受胸部CT和7种肺癌相关血清自身抗体（7-AAb.）检测32 ... 详细信息

目的通过联合生物学检测与影像学评估，在大型队列基础上构建临床预测模型，以提高肺结节良恶性鉴别的准确性。方法回顾性分析浙江大学医学院附属第一医院2020年1月—2024年4月接受胸部CT和7种肺癌相关血清自身抗体（7-AAb.）检测32 627例肺结节患者的临床资料。通过单因素和多因素l.gistic回归分析筛选肺结节良恶性的独立风险因素，并构建列线图模型。通过受试者工作特征（receiver operating characteristic,ROC）曲线、校准曲线及决策曲线分析（decision curve anal.sis,DCA）评估模型性能。结果共纳入1 017例肺结节患者。训练集共712例，其中男291例、女421例，平均年龄（58±12）岁；验证集共305例，其中男129例、女176例，平均年龄（58±13）岁。单因素ROC曲线分析显示，CT联合7-AAb.检测的诊断效能[曲线下面积（area under the curve,AUC）=0.794]，高于单独使用CT(AUC=0.667)或7-AAb.(AUC=0.514)。多因素l.gistic回归分析显示，影像学结节直径、结节性质及CT联合7-AAb.检测为肺结节良恶性诊断的独立预测因子，以此构建列线图预测模型。该模型在训练集和验证集的AUC值分别为0.826和0.862。DCA结果显示，该模型能够为临床决策提供较高的净收益。结论联合7-AAb.与CT能够显著提高肺结节良恶性鉴别的准确性。构建的预测模型为临床决策提供了有力支持，有助于肺结节的精准诊断与治疗。

关键词：肺结节自身抗体胸部影像学预测模型

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PHASES　AND　STRUCTURE　OF　PREFORM　DURING　PREPARING　PROCESS　OF　Al.TiCp　COMPOSITES　b.　DIRECT　REACTION　SYNTHESIS

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Acta Metal.urgica Sinica(Engl.sh l.tters) 1996年第6期9卷 545-548页

作者： S. Y Zeng b. Yang and E.l. zhang(Harb.n Institute of Technol.gy, Harb.n 150001, China)M.Z. Ma(Jiamusi University, Jiamusi 154002, China ) Harb.n Inst of Technol.gy Harbin China

Direct reaction synthesis(DRS), b.sed on the principl. of sel.-propagating hightemperature synthesis (SHS), is a new method for preparing particul.te metal.matrix composites (PMMCs). The effects of the temperature of the al.minum mel. and the al.minum content in the preform on the phases and structure of the reacted preform have b.en investigated b. X-ray diffraction and scanning el.ctron *** has b.en shown that TiC phase is prone to b. synthesized with the increasing of the temperature of the al.minum mel. and the decreasing of the al.minum powder content in the preform, and that the size of TiC particl. b.comes fine with the increasing of the temperature and the decreasing of the al.minum powder content.

关键词： direct reaction synthesis particul.te composite Al.TiC