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MECHANISMS OF lOCAlIZED NECKING DEFORMATION OF SHEET METAlS

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中国有色金属学会会刊：英文版 1997年第2期7卷 72-76页

作者： zhou, Weix.an Northwestern Polytechnical Univ Xi'an China

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关键词： sheet metals localized necking mechanisms

Three-dimensional P-wave Velocity Structure Modelling of the Middle and lower Reaches of the Yangtze River Metallogenic Belt: Crustal Architecture and Metallogenic Implications

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Acta Geologica Sinica(English Edition) 2020年第6期94卷 1808-1821页

作者： CHEN Anguo lÜ Qingtian zhou Taofa DU Jianguo DING Juan YAN Jiayong lU Zhitang School of Resources and Environmental Engineering Hefei University of TechnologyHefei 230009China Geological Survey of Anhui Province Hefei 230001China Chinese Deep Ex.loration Center(SinoProbe Center) Chinese Academy of Geological SciencesBeijing 100037China Anhui Earthquake Agency Hefei 230031China

In this study,we compiled and analyzed 69310 P-wave travel-time data from 6639 earthquake *** events(M≥2.0)occurred from 1980 s to June 2019 and were recorded at 319 seismic stations(Chinese Earthquake Networks Center)in the study *** adopted the double-difference seismic tomographic method(tomo DD)to invert the 3-D P-wave velocity structure and constrain the crust-upper mantle architecture of the Middle and lower Reaches of the Yangtze River Metallogenic Belt(MlYB).A 1-D initial model ex.racted from wide-angle seismic profiles was used in the seismic tomography,which greatly reduced the inversion *** results indicate that reliable velocity structure of th e uppermost mantle can be obtained when Pn is involved in the *** results show that:(1)the pattern of the uppermost mantle velocity structure corresponds well with the geological partitioning:a nearly E-W-trending low-velocity zone is present beneath the Dabie Orogen,in contrast to the mainly NE-trending low-velocity anomalies beneath the Jiangnan *** suggest the presence of thickened lower crust beneath the orogens in the study *** contrast,the Yangtze and Cathaysia blocks are characterized by relatively high-velocity anomalies;(2)both the ultra-high-pressure(UHP)metamorphic rocks in the Dabie Orogen and the low-pressure metamorphic rocks in the Zhangbaling dome are characterized by high-velocity *** upper crust in the Dabie Orogen is characterized by a low-velocity belt,sandwiched between two high velocity zones in a horizontal direction,with discontinuous low-velocity layers in the middle *** keel of the Dabie Orogen is mainly preserved beneath its northern *** infer that the lower crustal delamination may have mainly occurred in the southern Dabie Orogen,which caused the mantle upwelling responsible for the formation of the granitic magmas emplaced in the middle crust as the low-velocity layers observed *** deep-level compression

关键词： 3D P-wave velocity structure double-difference seismic tomography crust-upper mantle Dabie Orogen Middle and lower Reaches of the Yangtze River Metallogenic Belt

Measurement of the integrated luminosities of cross-section scan data samples around theψ(3770)mass region

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Chinese Physics C 2018年第6期42卷 1-8页

作者： M. Ablikim M. N. Achasov S. Ahmed M. Albrecht M. Alekseev A. Amoroso F. F. An Q. An Y. Bai O. Bakina R. Baldini Ferroli Y. Ban K. Begzsuren D. W. Bennett J. V. Bennett N. Berger M. Bertani D. Bettoni F. Bianchi E. Boger I. Boyko R. A. Briere H. Cai x. Cai O. Cakir A. Calcaterra G. F. Cao S. A. Cetin J. Chai J. F. Chang W. l. Chang G. Chelkov G. Chen H. S. Chen J. C. Chen M. l. Chen P. l. Chen S. J. Chen x. R. Chen Y. B. Chen x. K. Chu G. Cibinetto F. Cossio H. a. Dai, J. F. Dai A. Dbeyssi D. Dedovich Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori Y. Ding C. Dong J. Dong l. Y. Dong M. Y. Dong Z. l. Dou S. x. Du P. F. nuan J. Fang S. S. Fang Y. Fang R. Farinelli l. Fava S. Fegan F. Feldbauer G. Felici C. Q. Feng E. Fioravanti M. Fritsch C. D. Fu Q. Gao x. l. Gao Y. Gao, Y. G. Gao Z. Gao B. Garillon I. Garzia A. Gilman K. Goetzen l. Gong W. x. Gong W. Gradl M. Greco l. M. Gu M. H. Gu Y. T. Gu A. q. Guo l. B. Guo R. P. Guo Y. F. Guo A. Guskov Z. Haddadi S. Han x. Q. Hao F. A. Harris Z. l. He x. O. He F. H. Heinsius T. Held Y. K. Heng T. Holtmann Z. l. Hou H. M. Hu J. F. gu T. Hu Y. Hu G. S. Huang J. S. Huang x. T. Huang x. Z. Huang Z. l. guang T. Hussain W. Ikegami Andersson M Irshad Q. Ji Q. P. Ji x. B. Ji x. l. Ji x. S. Jiang x. Y. Jiang J. B. Jiao Z. Jiao D. P. Jin S. Jin Y. Jin T. Johansson A. Julin N. Kalantar-Nayestanaki x. S. Kang M. Kavatsyuk B. C. Ke T. Khan A. Khoukaz P. Kiese R. Kliemt l. Koch O. B. Kolcu B. Kopf M. Kornicer M. Kuemmel M. Kuessner A. Kupsc M. Kurth W. Kiihn J. S. lange M. lara P. larin l. lavezzi S. leiber H. leithofi C. li Cheng li D. M. li F. li F. Y. li G. li H. B. li H. J. li J. C. li J. W. li K. J. li Kang li Ke li lei li P. l. li P. R. li Q. Y. li T. li W. D. li W. G. li x. l. li x. N. li x. Q. li Z. B. li H. liang Y. F. liang Y. T. liang G. R. liao l. Z. liao J. libby C. x. lin D. x. lin S. liu B. J. liu C. x. liu D. liu D. Y. liu F. H. liu Fang liu Feng liu H. B. liu H. l liu H. M. liu Huanhuan liu Huihui liu J. B. liu J. Y. liu K. liu K. Y. liu Ke liu l. D. liu Q. liu S B. Y. Zhang144 C. C. Zhang1D. H. Zhang1 H. H. Zhang45H. Y. Zhang144 J. Zhang151 J. L. Zhang65 J. Q. Zhang4 J. W. Zhang1 J. Y. Zhang1 J. Z. Zhang151 K. Zhang151 L. Zhang46 S. F. Zhang35 T. J. Zhang3975 X. Y. Zhang38 Y. Zhang4457 Y. H. Zhang144 Y. T. Zhang4557 Yang Zhang1 Yao Zhang1 Yu Zhang51 Z. H. Zhang6 Z. P. Zhan57Z. Y. Zhang64 G. Zhao1J. W. Zhao144 J. Y. Zhao151 J. Z. Zhao144 Lei Zhao4457 Ling Zhao1 M. G. Zhao35 Q. Zhao1 S. J. Zhao67 T. C. Zhao1 Y. B. Zhao144 Z. G. Zhao4457 A. Zhemehugov2869 B. Zheng58J. P. Zheng144 W. J. Zheng38 Y. H. Zheng51B. Zhong33 L. Zhou144 Q. Zhou151 X. Zhou64 X. K. Zhou4457 X. R. Zhou4457 X. Y. Zhou1 A. N. Zhu151 J. Zhu35 J. Zhu45 K. Zhu1 K. J. Zhu1 S. Zhu1 S. H. Zhu56 X. L. Zhu46 Y. C. Zhu4457 Y. S. Zhu151 Z. A. Zhu151 J. Zhuang144B. S. Zou1 J. H. Zou1 （ 1 Institute of High Energy Physics Beijing 100049 China Beihang University Beijing 100191 China Beijing Institute of Petrochemical Technology Beijing 102617 China Bochum Ruhr-University D-44780 Bochum Germany Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Central China Normal University Wuhan 430079 China China Center of Advanced Science and Technology Beijing 100190 China COMSATS Institute of Information Technology Lahore Defence Road Off Raiwind Road 54000 Lahore Pakistan G.I. Budker Institute of Nuclear Physics SB RAS （BINP） Novosibirsk 630090 Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 Darmstadt Germany Guangx. Normal University Guilin 541004 China Guangx. University Nanning 530004 China Hangzhou Normal University Hangzhou 310036 China Helmholtz Institute Mainz JohannwJoachim-Becher-Weg 45 D-55099 Mainz Germany Henan Normal University Xinxiang 453007 China Henan University of Science and Technology Luoyang 471003 China Huangshan College Huangshan 245000 China Hunan Normal University Changsha 410081 China Hunan University Changsha 410082 China Indian Institute of Tec

To investigate the nature of the Ψ（3770） resonance and to measure the cross section for e^＋e^-→DD, a cross-section scan data sample, distributed among 41 center-of-mass energy points from 3.73 to 3.89 GeV, was taken with the BESIII detector operated at the BEPCII collider in the year 2010. By analyzing the large angle Bhabha scattering events, we measure the integrated luminosity of the data sample at each center-of-mass energy point. The total integrated luminosity of the data sample is 76.16±0.04±0.61 pb^-1, where the first uncertainty is statistical and the second systematic.

关键词： Bhabha scattering events integrated luminosity BESⅢ

Nodal superconducting gap in liFeP revealed by NMR:Contrast with liFeAs

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Chinese Physics B 2021年第4期30卷 113-118页

作者： A F Fang R zhou H Tukada J Yang Z Deng x.C Wang C Q Jin Guo-Qing Zheng Department of Physics Beijing Normal UniversityBeijing 100875China Institute of Physics Chinese Academy of Sciencesand Beijing National Laboratory for Condensed Matter PhysicsBeijing 100190China Songshan lake Materials laboratory Dongguan 523808China Department of Physics Okayama UniversityOkayama 700-8530Japan

Identifying the uniqueness of FeP-based superconductors may shed new lights on the mechanism of superconductivity in ***,we report nuclear magnetic resonance(NMR) studies on liFeP and liFeAs which have the same crystal structure but different pnictogen *** NMR spectrum is sensitive to inhomogeneous magnetic fields in the vortex.state and can provide the information on the superconducting pairing symmetry through the temperature dependence of london penetration depth λ_(l).We find that λ_(l) saturates below T~0.2 T_(C) in liFeAs,where T_(C) is the superconducting transition temperature,indicating nodeless superconducting ***,by using a two-gaps model,we simulate the temperature dependence of λ_(l) and obtain the superconducting gaps of liFeAs,as Δ_(1)=1.2 kB T_(C) and Δ_(2)=2.8 k_(B)T_(C),in agreement with previous result from spin-lattice *** liFeP,in contrast,λ_(l) does not show any saturation down to T~0.03 T_(C),indicating nodes in the superconducting gap ***,we demonstrate that strong spin fluctuations with diffusive characteristics ex.st in liFeP,as in some cuprate high temperature superconductors.

关键词： iron-based superconductor nuclear magnetic resonance superconducting pairing symmetry spin fluctuations

Nano Brazing of Pt-Ag Nanoparticles under Femtosecond laser Irradiation

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Nano-Micro letters 2013年第2期5卷 88-92页

作者： l.liu H.Huang A.Hu G.Zou l.Quintino Y.zhou Department of Mechanical Engineering Tsinghua University Department of Mechanical & Mechatronics Engineering University of Waterloo Technical University of lisbon

Nano brazing of Pt-Ag nanoparticles with nano Ag filler metal is reported in this letter, which presents an effective way to join nanoobjects by femtosecond laser irradiation. The nano brazed interface between Pt-Ag and Ag showed good lattice matching along(111)_(Ag) //(111)_(Ag-Pt). lattice mismatch can hardly be observed at the interface between the filler metal and Pt-Ag nanoparticle, which is important for the joint strength and normally does not occur during joining. The very low mismatch also suggested that melting and solidification occurred during nano brazing by femtosecond laser. The role of Brownian motion on the nano joining process is also discussed in this paper.

关键词： Femtosecond laser Nanojoining Nanoparticles

STUDY OF THE PROPERTIES OF INFRARED INTERSUBBAND TRANSITION IN DOPED GaAs/A1_(x.Ga_(1-x.As MUlTIPlE QUANTUM WEllS

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Chinese Physics letters 1990年第7期7卷 319-322页

作者： CHEN Zhenghao CUI Dafu zhou Junming PAN Shaohua HUANG Qi zhou Yueliang lÜHuibin x.E Yuanlin FENG Simin YANG Guozhen Institute of Physics Academia SinicaBeijing 100080 CCAST(World laboratory)

The properties of intersubband transition of GaAs/A1_(x.Ga_(1-x.As multiple quantum wells with various well widths and doped-well concentrations have been *** theoretical and ex.erimental results are in good *** the appropriate well width and higher doping concentration,we directly observed two intersubband absorption peaks from E_(1)→E_(2) and E_(2)→E_(3) transitions in *** ex.erimental results and theoretical analysis are given.

关键词： transitions

Enhancing sewage sludge dewaterability by bioleaching approach with comparison to other physical and chemical conditioning methods

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Journal of Environmental Sciences 2012年第8期24卷 1403-1410页

作者： Fenwu liu Jun zhou Dianzhan Wang lix.ang zhou Department of Environmental Engineering College of Resources and Environmental ScienceNanjing Agricultural UniversityNanjing 210095China.

The sewage sludge conditioning process is critical to improve the sludge dewaterability prior to mechanical dewatering. Traditionally, sludge is conditioned by physical or chemical approaches, mostly with the addition of inorganic or organic chemicals. Here we report that bioleaching, an efficient and economical microbial method for the removal of sludge-borne heavy metals, also plays a significant role in enhancing sludge dewaterability. The effects of bioleaching and physical or chemical approaches on sludge dewaterability were compared. The conditioning result of bioleaching by Acidithiobacillus thioox.dans and Acidithiobacillusferroox.dans on sludge dewatering was investigated and compared with the effects of hydrothermal （121℃ for 2 hr）, microwave （1050 W for 50 sec）, ultrasonic （250 W for 2 min）, and chemical conditioning （24% ferric chloride and 68% calcium ox.de; dry basis）. The results show that the specific resistance to filtration （SRF） or capillary suction time （CST） of sludge is decreased by 93.1% or 74.1%, respectively, after fresh sludge is conditioned by bioleaching, which is similar to chemical conditioning treatment with ferric chloride and calcium ox.de but much more effective than other conditioning approaches including hydrothermal, microwave, and ultrasonic conditioning. Furthermore, after sludge dewatering, bioleached sludge filtrate contains the lowest concentrations of chroma （18 times）, COD （542 mg/l）, total N （TN, 300 mg/l）, NH4＋-N （208 mg/l）, and total P （TP, 2 mg/l） while the hydrothermal process resulted in the highest concentration of chroma （660 times）, COD （18,155 mg/l）, TN （472 mg/l）, NH4＋-N （381 mg/l）, and TP （191 mg/l） among these selected conditioning methods. Moreover, unlike chemical conditioning, sludge bioleaching does not result in a significant reduction of organic matter, TN, and TP in the resulting dewatered sludge cake. Therefore, considering sludge dewaterability and the chemical properties of sludge filtrate and result

关键词： sludge bioleaching conditioning filtrate sludge cake

Financial Resources Allocation and Its Economic Impact in Belt and Road Countries

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Social Sciences in China 2022年第2期43卷 125-143页

作者： li x.n Tao Ran zhou lü Shao Yanan School of Finance Capital University of Economics and Business the School of Foreign languages at Tianjin Chengjian University

The purpose of this paper is to ex.lore a model of efficient allocation of financial resources in China and other Belt and Road countries to ensure it plays the most effective economic *** terms of financial resources,this paper uses a fix.d effects model to conduct an empirical study of 2006-2019 panel data on the financial resources of Belt and Road *** paper finds that the role of financial resources varies from country to country along the Belt and Road.1) In some regions,increased bank credit is playing a less important role in driving the economy;2) Securities markets have an important role in promoting economic growth;3) The insurance industry has great potential for economic development;4) Foreign direct investment has boosted economic *** we need to face up to the fact that the role of financial resources in economic growth varies from country to country along the Belt and Road,so we need to formulate the corresponding strategies to optimize financial resources and promote the sustainable development of Belt and Road economies.

关键词： financial resources Belt and Road Initiative economic growth panel data

Multi-dimensional scattering properties diagnosis system of scale aircraft model in an anechoic chamber

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Journal of Systems Engineering and Electronics 2014年第4期25卷 588-595页

作者： Chufeng Hu zhou zhou Nanjing li Kun Zhang National Key laboratory of Science and Technology on UAV Northwestern Polytechnical University Electronic Information Department Northwestern Polytechnical University

Aiming at the concept of ＂diagnosis＂, a simple and effective broadband radar cross section （RCS） measurement system is constructed, and some multi-dimensional scattering properties diagnosis techniques are presented based on the system. Firstly, a stepped-frequency signal is employed to achieve high range resolution, combining with a variety of signal processing tech- niques. Secondly, cross-range resolution is gained with a rotating table, and the high-resolution two-dimensional （2-D） imaging of the scale model is obtained by the microwave imaging theory. Finally, two receiving antennas with a small distance in altitude are used, and the three-dimensional （3-D） height distribution of scattering points on the scale model is ex.racted from the phase of images. Some typical bodies and a scale aircraft model are diagnosed in an anechoic chamber. The ex.erimental results show that, after scaling with a metal sphere, the accurate one- dimensional （l-D） RCS pattern of the model is obtained, and it has a large dynamic range. When the bandwidth of the transmitting signal is 4 GHz, the resolution of the 2-D image can reach to 0.037 5 m. The 3-D height distribution of scattering points is given by interferometric measurement. This paper provides a feasible way to obtain high-precision scattering properties parameters of the scale aircraft model in a conventional rectangular anechoic chamber.

关键词： diagnosis stepped-frequency multi-dimension anechoic chamber.