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frontiers of Computer science 2014年第5期8卷 773-784页

作者： Wenjie ca1 seiichi UCHIDA Hiroaki sAKOE Department of Advanced Information Technology Kyushu University Fukuoka-shi 819-0395 Japan

for stroke-order free online multi-stroke charac- ter recognition, stroke-to-stroke correspondence search be- tween an input pattern and a reference pattern plays an im- portant role to deal with the stroke-order variation. Although various methods of stroke correspondence have been pro- posed, no comparative study for clarifying the relative su- periority of those methods has been done before. In this pa- per, we firstly review the approaches for solving the stroke- order variation problem. Then, five representative methods of stroke correspondence proposed by different groups, includ- ing cube search （Cs）, bipartite weighted matching （BWM）, individual correspondence decision （ICD）, stable marriage （sM）, and deviation-expansion model （DE）, are experimen- tally compared, mainly in regard of recognition accuracy and efficiency. The experimental results on an online Kanji char- acter dataset, showed that 99.17%, 99.17%, 96.37%, 98.54%, and 96.59% were attained by Cs, BWM, ICD, sM, and DE, respectively as their recognition rates. Extensive discussions are made on their relative superiorities and practicalities.

关键词： cube search bipartite weighted matching indi-vidual correspondence decision stable marriage deviation-expansion model

Modelling ballistic impact on military helmets:The relevance of projectile plasticity

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Defence Technology（防务技术） 2021年第5期17卷 1699-1711页

作者： A.caçoilo R.Mourao f.Teixeira-Dias A.Azevedo f.Coghe R.A.f.Valente school of Engineering The University of EdinburghEdinburghEH93FGUK Dept.Weapon systems and Ballistics Royal Military AcademyBrusselsBelgium Centre for Mechanical Technology and Automation Department of Mechanical EngineeringUniversity of AveiroPortugal

The need to develop armour systems to protect against attacks from various sources is increasingly a matter of personal,social and national *** develop innovative armour systems it is necessary to monitor developments being made on the type,technology and performance of the threats(weapons,projectiles,explosives,etc.) specifically,the use of high protection level helmets on the battlefield is *** development of evaluation methods that can predict injuries and trauma is therefore of major ***,the risk of injuries or trauma that can arise from induced accelerations is an additional *** develop new materials and layouts for helmets it is necessary to study the effects caused by ballistic impacts in the human head on various *** use of numerical simulation is a fundamental tool in this *** work here presented focuses on the use of numerical simulation(finite elements analysis) to predict the consequences of bullet impacts on military helmets on human *** main objectives are to assess the level and probability of head trauma using the Head Injury Criterion,caused by the impact of a 9 mm NATO projectile on a pasGT helmet and to quantify the relevance of projectile plasticity on the whole modelling *** accelerations derived from the impact phenomenon and the deformations caused on the helmet are evaluated using fully three-dimensional models of the helmet,head,neck and *** studies are done at impact angles ranging from 0 to 75°.Results are presented and discussed in terms of HIC and probability of acceleration induced trauma *** comparison analyses are done using a rigid and a deformable projectile and it is observed that plastic deformation of the projectile is a significant energy dissipation mechanism in the whole impact process.

关键词： Ballistic impact Helmet impact plasticity finite element analysis Injury Trauma HIC

pisco grape pomace:Iron/copper speciation and antioxidant properties,towards their comprehensive utilization

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food Bioscience 2022年第3期47卷 1213-1221页

作者： fátima Rodríguez-Ramos Raúl cañas-sarazúa Vilbett Briones-Labarca Departamento de Ingeniería en Alimentos Universidad de La SerenaAv.Raúl Bitrán Nachary 1305Box 5991720010La SerenaChile

The pisco and wine industry produces hundreds of tons of grape pomace each year in Chile,generating environmental problems,and demanding urgent strategies for its *** aim of this work was to study the pisco grape pomace based on a physicochemical characterization,an iron/copper speciation analysis,and the optimization for polyphenols recovery,establishing the polyphenolic profile,antioxidant properties,and the fe^(2+)/Cu^(2+) chelating activity,to promote their revalorization as an ingredient with potential application in the food *** chemical characterization showed mainly high values for crude protein(15.36%dw)and potassium(9240.66 mg/kg).The fe/Cu speciation depicted that iron and copper soluble forms in pisco pomace flour represented 70.57%and 52.18%,respectively,regarding total *** optimized extract showed mainly pyrogallol,catechin and epicatechin,with concentrations of 1078.43±60.14μg/g,883.20±7.57μg/g and,751.76±23.04μg/g,respectively,with a relevant antioxidant capacity by Oxygen Radical Absorbance capacity(ORAC)of 1402.15μmol TE/g dw GpE and,a better chelating ability to complex fe^(2+) than Cu^(2+).The pisco pomace was for the first time chemically characterize,showing it as a potential source of minerals and antioxidant biocompounds,making it a good candidate for nutritional applications,as a rich source of organic matter or even could be potentially utilized to produce value-added commodities,toward a circular economy.

关键词： pisco grape pomace polyphenols Chemical speciation analysis Antioxidant capacity Metal chelating ability

Assessment of CO_(2)storage prospect based on physical properties of Rio Bonito formation rock units

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Energy Geoscience 2024年第1期5卷 321-330页

作者： Richardson M.Abraham-A stephanie san Martín cañas Isabella f.s.Miranda Colombo C.G.Tassinari Institute of Energy and Environment(IEE) University of São Paulo(USP)Brazil Research Centre for Greenhouse Gas Innovation(RCGI) University of Sãao Paulo(USP)Brazil

The physical properties of the rock units associated with the Rio Bonito formation are presented in this study with the focus on modelling reservoir quality based on petrophysics-derived parameters to evaluate CO_(2)storage *** involves the modelling of the reservoir depths,thicknesses,flow zone indicators(fZI),and effective permeability(Keff)and presenting the CO_(2)storage efficiency factors peculiar to the rock units of the study *** results presented by this study for the stated objectives are not quite common in the *** values range from 200 mD to higher than 2000 mD,and fZI values are generally above 1.0 mm and up to 13.0 mm within the portions covered by the drilled *** sandstone units recorded are up to 20 m thick in some *** Keff and fZI models indicate the sandstone reservoirs as permeable units to support the injection and circulation of CO_(2)within the potential reservoir units of the Rio Bonio formation across são paulo *** from some points in the southeastern part of the study location,where the Rio Bonito are delineated at depths less than 800 m(minimum CO_(2)storage depth based on best practices),other portions are deeper,ranging from 950 m to 3500 ***-bedded layers will affect the integrity of the rocks as CO_(2)storage tanks or reservoir seals/traps/overburden within the *** bed thicknesses are up to 20 m in some ***,hybrid CO_(2)reservoir units are feasible,especially in portions where thin siltstone layers are sandwiched between sandstone units to provide considerable thicknesses based on CO_(2)storage *** current study shows that useable areas considering reservoir thickness,depth,and other physical qualities will significantly control the CO_(2)storage efficiency of the study *** studies featuring a detailed geophysical exploration of the site to confirm the availability and saturations of preexisting fluid(hydrocarbon and water)are encouraged

关键词： Rio Bonito Effective permeability fluid transmissibility CO_(2)storage prospect Reservoir quality Overburden integrity flow zones

北祁连山高压变质带的变形和变质特征及其对俯冲带折返的意义

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岩石学报 2009年第9期25卷 2235-2246页

作者：曹毅宋述光 ca0 peking Univ MOE Key Lab Orogen Belts & Crustal Evolut Dept Geol Beijing 100871 Peoples R China

北祁连造山带是早古生代大洋板块"冷"俯冲的典型地区,形成了一系列高压低温变质的岩石组合。基性榴辉岩是俯冲洋壳变质的产物,根据其结构构造特征可以划分为(1)粒状榴辉岩,峰期变质矿物组合为Grt+Omp+phn+Rut±Lws,硬柱石呈包裹体和假... 详细信息

北祁连造山带是早古生代大洋板块"冷"俯冲的典型地区,形成了一系列高压低温变质的岩石组合。基性榴辉岩是俯冲洋壳变质的产物,根据其结构构造特征可以划分为(1)粒状榴辉岩,峰期变质矿物组合为Grt+Omp+phn+Rut±Lws,硬柱石呈包裹体和假象分布于石榴石内,变质温压条件T=465～508℃,p=2.30～2.60Gpa。(2)片状榴辉岩,岩石具片状构造,其共生矿物组合Omp+Czo/Ep+phn+Gln构成透入性面理s_1和线理L_1,以及宏观和显微同斜褶皱f_1。其峰期变质温压条件为T=466～510℃,p=1.9～2.2Gpa。(3)蓝片岩相退化变质榴辉岩,蓝片岩相变质矿物Gln+Ep+phn±Ab强烈交代榴辉岩相矿物,并发生强烈D_2期变形作用,岩石形成明显的透入性面理s_2和线理L_2,以及同斜剪切褶皱f_2。蓝闪石和多硅白云母线理的统计揭示D_2期变形以斜向走滑剪切为主,与D_1期变形的榴辉岩的运动学特征大体相似。D_2同变质的温压条件为T=422～487℃,p=1.15～1.37Gpa。高压变质带晚期的绿片岩相叠加和D_3期变形,形成透入性面理s_3和线理L_3,其运动特征为近于垂直构造线的逆冲剪切。结合榴辉岩变形特征,变质温压条件和同位素年代学资料,我们认为退变质的强弱与变形程度有密切关系。峰期变质后的榴辉岩经过早期绿帘石榴辉岩相到蓝片岩相斜向走滑剪切,和晚期绿片岩相逆冲,在泥盆纪早期快速折返的出露地表。

关键词：北祁连山高压变质带变形变质特征俯冲带折返 implications 榴辉岩相峰期变质温压条件 mineral assemblage 蓝片岩相 North Qilian Mountains isotopic geochronology 走滑剪切线理绿片岩相矿物组合变质矿物 movement Early paleozoic

Rate of convergence for the Legendre pseudospectral optimal control of feedback linearizable systems

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控制理论与应用（英文版） 2010年第4期8卷 391-405页

作者： Wei KANG (Department of Applied Mathematics,Naval postgraduate school,Monterey ca 93943,UsA) Department of Applied Mathematics Naval Postgraduate School Monterey USA

pseudospectral （ps） computational methods for nonlinear constrained optimal control have been applied to many industrial-strength problems,notably,the recent zero-propellant-maneuvering of the international space station performed by *** this paper,we prove a theorem on the rate of convergence for the optimal cost computed using a Legendre ps *** addition to the high-order convergence rate,two theorems are proved for the existence and convergence of the approximate *** to existing work on ps optimal control as well as some other direct computational methods,the proofs do not use necessary conditions of optimal ***,we do not make coercivity type of *** a result,the theory does not require the local uniqueness of optimal *** addition,a restrictive assumption on the cluster points of discrete solutions made in existing convergence theorems is removed.

关键词： Computational optimal control pseudospectral method Convergence

Microstructure and Mechanical Behaviour of proton-and Ion-irradiated Ll_2 Intermetallic Compounds

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Journal of Materials science & Technology 1994年第4期10卷 235-245页

作者： f. C. Chen and A .J.Ardell (Dept. of Materials science and Engineering, University of california, Los Angeles, ca 90024-1595, UsA) Univ of california Los Angeles United States

The results of mechanical testing and transmission electron microscopy on the ordered intermetallic Ll2 compounds1Zr3Al, Ni3Al, Ni3si and Ni3Ge after irradiation with protons or heavy ions at high or low tem peratu re are presented and discussed. Using a minjaturjzed disk-bend test. it was found that proton irradiation of Zr3Al. Ni3Al and Ni3si raises their yield strength :a single test of Ni3Ge shows no effect on the fracture stress of this brittle intermetallic The Vickers microhardness of all four alloys is raised by proton irradiation. The irradiations cause all the alloys to disorder. the extent of which is dependent on irradiation temperature Microstructural defects are produced by the irradiations some exhibit strain-field contrast under dynamic two-beam diffracting conditions. Other distinct defect clusters are imaged only in dark-field using su perlattice reflections, These latter defects are discussed in the context of current arnorphization models. The strength increase of Zr3Al, Ni3Al and Ni3si is attributed to a combination of disordering and strengthening from defects. The lack of an effect of irradiation on the fracture stress of Ni3Ge. in which voids were observed, requires further experiments

关键词： Ni si Zr Microstructure and Mechanical Behaviour of proton-and Ion-irradiated Ll2 Intermetallic Compounds figure

stability of Time-Dependent Diffusion semigroups and Kernels

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Acta Mathematica sinica,English series 1999年第4期15卷 575-586页

作者： Weian ZhengDepartment of Mathematics,University of california,Irvine,ca92612,U s ADepartment of statistics,East China Normal University,shanghai 200062,p.R.China E-mail:wzhengmath.uci.edu Department of Mathematics University of California Irvine USA Department of statistics East China Normal University Shanghai P. R. China

The main result of this paper is that when the coefficients of the time-dependent divergence form operators are Hlder continuous in time with order not too much smaller than （1/2）,the distance of the semigroups of t... 详细信息

关键词： Time-dependent diffusion semigroups stability Hlder continuous

A two-configuration study on the photodetachment cross-section for the 3σ_u channel of f_2^-

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science China Mathematics 1997年第4期40卷 432-435页

作者：孙卫国 R.M. pitzer C.W. McCurdyLawrence Livermore National Laboratory p.O.Box 5509 L-561 Livermore ca 94550 U.s.A. Department of Applied Chemistry Sichuan Union University Chengdu 610065 China Department of Chemistry Ohio State University Columbus Ohio 43210 U.S.A.

An unusual resonance feature of the photodetachment cross-section for the 3σu channel of f2- observed in the early static-exchange study is confirmed by using correlated target (f2) wavefunctions determined by configuration interaction (CI). The magnitude of the cross-sections is lowered from that in earlier calculation by the potential of the correlated target.

关键词： resonance cross-section photodetachment configuration-interaction.x

Measurement of Ultra-short single-photon pulse Duration with Two-photon Interference

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Chinese physics Letters 2011年第2期28卷 93-96页

作者： LV fan sUN fang-Wen ZOU Chang-Ling HAN Zheng-fu GUO Guang-ca Key Lab of Quantum Information University of Science and Technology of ChinaHefei 230026

We proposed a protocol of measuring the duration of ultra-short single-photon pulse with two-photon *** pulse duration can be obtained from the width of the visibility of two-photon Hong-Ou-Mandel interference or the indistinguishability of the two ***,the shape of a single-photon pulse can be measured with ultra-short single-photon pulses through the two-photon interference.

关键词： photon pulse visibility