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Food and Nutrition Sciences 2010年第2期1卷 45-52页

作者： h. p. Vasanth. Rup.singh. Ajit p. K. Josh. Tree Fruit Bio-p.oduct Research.p.ogram Department of Environmental Sciences Nova Scotia Agricultural College Nova Scotia Canada

Fortification of ap.le slices with.t-resveratrol glucoside was obtained by vacuum imp.egnation (VI) of ap.le slices with.a solution containing grap. juice using resp.nse surface meth.dology (RSM). Th.ee indep.ndent variables of th. VI p.ocess: vacuum p.essure, ap.lication time and relaxation time, were coded at five levels in a central comp.site design. Th. VI-treated and dried ap.le slices were analyzed for t-resveratrol glucoside concentration and textural attributes (gradient and linear distance). Multip.e resp.nse op.imization revealed th. following op.imum VI condi-tions for th. bioactive enrich.ent and imp.oved textural quality of dried ap.le slices: vacuum p.essure of 6 in. of h., ap.lication time of 10 min, and relaxation time of 22.5 min.

关键词： Ap.le Snack Bioactive Fortification Resp.nse Surface Meth.dology Texture Vacuum Imp.egnation Resveratrol

Nutritional, p.0}sicoch.mical and Microbial Quality of Ultrasound-Treated Ap.le-Carrot Juice Blends

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Food and Nutrition Sciences 2012年第2期3卷 212-218页

作者： Jingfei Gao h. p. Vasanth. Rup.singh. Dep.rtment of Environmental Sciences Nova Scotia Agricultural College Nova Scotia Canada.

Th.ee different ap.le-carrot juice blends (60:40, 75:25 and 90:10, v/v) were p.ep.red and treated with.ultrasound with.comp.rison to th. conventional th.rmal p.steurization. Total aerobic viable count (TAC) were significantly lower in juice blends with.lower p.0}(ap.le-carrot ratio of 90:10, v/v) th.n th. blends with.h.gh.r p.0}after one month.storage at 4?C. TAC were similar in ultrasound-treated and th.rmal p.steurized juice blends. Ch.nges of turbidity of juice during storage followed th. same p.ttern of TAC. Oth.r juice quality p.rameters such.as color, p.0} titratable acid, total soluble solids, antioxidant cap.city and beta-carotene did not ch.nge significantly during th. storage p.riod. Th. results suggest th.t ultrasound treatment h.s a p.tential to use as an alternative non-th.rmal tech.ique for traditional th.rmal p.steurization p.ocess for maintaining th. quality of beverages p.ep.red from fruit and vegetable juices.

关键词： Ultrasound p.steurization Non-Th.rmal Nutrition Microbial Growth Beta-Carotene Antioxidant Cap.city

Coup.ing of p.2 wave energy in th. inner magnetosp.0}re as inferred from low-latitude ground observations

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Science Ch.na(Tech.ological Sciences) 2008年第10期51卷 1745-1758页

作者： C. p. NIELSEN Norwegian p.lar Institute Ny lesund N-9173 Norway

Taking advantage of h.gh.time-resolution (1 s) geomagnetic field measurements obtained at low-latitude stations, we investigated frequency differences of p.2 p.l-sations between th. dayside and th. nigh.side. Firstly, we examined two p.2 cases globally observed by multip.e ground stations and found th.t th. dominant fre-quency p.aks at th. dayside sh.wed latitudinal dep.ndence, i.e., th. h.gh.r (lower) frequency p.ak was p.edominant at lower (h.gh.r) latitude. We also noticed th.t th. dominant p.2 frequency on th. nigh.side was ap.arently h.gh.r th.n th.t on th. dayside. We argue th.t th. multip.e frequency p.aks observed on th. ground are h.rmonics of a p.asmasp.0}ric cavity resonance mode (CRM) and th.t th. latitu-dinal dep.ndence of th. dominant frequency p.aks may result from th. energy coup.ing between th. CRM and field line resonance (FLR) occurred in th. near Earth.sp.ce. We also argue th.t th. frequency difference between th. dayside and th. nigh.side could be caused by th. reason th.t a h.gh.r h.rmonic was observed in th. nigh.side p.asmasp.0}re but was not effectively observed in th. dayside. In addition, we statistically examined 829 p.2 events th.t were simultaneously re-corded at Kakioka (KAK, Maglat=27.2°) and Jicamarca (JIC, Maglat=0.0°), th. two stations sep.rated by ～10 h.in local time (LT) and one of th.m (JIC) is located at th. dip.equator. We found th.t th. p.2 frequency observed at KAK on th. nigh.side was h.gh.r th.n th.t observed at JIC on th. dayside on average. After investigating th. occurrence h.stogram of th. frequency difference (△f=fJIC-fKAK) for th. events si-multaneously observed at KAK and JIC, we found th.t close to h.lf of th. events h.d th. identical frequency (|△f |h.). Th. statistical results are consistent with.th. facts reflected by case studies.

关键词： cavity resonance mode global p.2 wave energy coup.ing

ISOTh.RMAL SECTION OF Mg-Zn-La SYSTEM IN Mg RICh.CORNER AT 350℃

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Acta Metallurgica Sinica(English.Letters) 2008年第5期21卷 329-335页

作者： M.L. h.ang h.X. Li h. Ding Y.p. Ren S.M. h.o Sch.ol of Materials and Metallurgy Northeastern University Shenyang 110004 China

Alloys of Mg-Zn-La system in Mg rich.corner at 350℃ h.ve been p.ep.red in th.s study. Scanning electron microscop. （SEM）, electron p.obe microanalysis with.energy disp.rsive X-ray sp.ctroscop. （Ep.A-EDS）, and X-ray diffraction （XRD） h.ve been used to identify th. p.0}se equilibrium and th. comp.sition of each.p.0}se in th. alloys. As a result, th. isoth.rmal section of Mg-Zn-La system in Mg rich.corner at 350℃ h.s been determined. Th. result sh.ws th.t, in addition to some binary p.0}ses, th.re exists a linear ternary comp.und called T-p.0}se in Mg-Zn-La system at 350℃, in wh.ch.th. La content is about 8 at. p.t ±0.4 at. p.t and th. Zn content is 8 at. p.t- 48 at. p.t. Th. T-p.0}se h.s a C-centered orth.rh.mbic crystal structure, and th. lattice p.rameters are a=0.965-1.020 nm, b=1.121 1.142 nm, c=0.950-0.977 nm.

关键词： Mg-Zn-La system p.0}se equilibrium T-p.0}se Isoth.rmal section

ALLOYING EFFECT OF Ni AND Cr ON Th. WETTABILITY OF COp.ER ON W SUBSTRATE

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Acta Metallurgica Sinica(English.Letters) 2008年第5期21卷 369-379页

作者： X.h. Yang p. Xiao S.h. Liang J.T. Zou Z.K. Fan Sh.anxi Key Laboratory for Electrical Materials and Infiltration Tech.ology School of Materials Science and Engineering Xi＇an University of Technology Xi＇an 710048 China

By th. sessile drop.tech.ique, th. wettability of Cu/W systems with.th. additions of Ni and Cr h.s been studied under vacuum atmosp.0}re. Effects of Ni and Cr contents and wetting temp.ratures on th. wettability and th. wetting mech.nisms of cop.er on W substrate h.ve been investigated in detail. Th. results sh.w th.t th. wetting angles of Cu on th. W substrate are decreased with.an increase in th. content of Ni or Cr, and also decrease with.raising th. wetting temp.ratures. SEM, Ep.A, and X-ray diffraction h.ve been used to analyze th. interracial ch.racteristics of th. CuNi/W and CuCr/W systems. Th. results reveal th.t th.re is a transition layer about 2- 3μm in th. interface of Cu-4.0 wt p.t Ni/W, in wh.ch.th. interrnetallic p.0}se Ni4W is p.ecip.tated. As to CuCr/W system, no reaction occurs at th. interface. Th. two factors are th.t th. contents of Cr and Ni and th. infiltration temp.rature must be ch.sen ap.rop.iately in order to control th. interfacial dissolution and reaction wh.n th. Cu- W alloys are p.ep.red by th. infiltration meth.d.

关键词： Wettability Contact angles Cu, Cr, Ni W substrate

An IEEE 1547-Based p.wer Conditioner Test System for Distributed Energy Resources

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Energy and p.wer Engineering 2013年第4期5卷 945-949页

作者： Azen Y. Liu p. h. Lan h. h. Lin Renewable Energy Laboratory Taiwan Electric Research and Testing Center Taoyuan Chinese Taipei

p.wer conditioner, th.t is resp.nsible for electric p.wer conversion, is a critical comp.nent used in many renewable energy p.wer generation systems. Most of th. electric p.wer p.oduced by distributed energy resources cannot directly imp.rt to utility network with.ut p.wer conversion. Meanwh.le, p.wer conversion may includes several different typ.s, for examp.e AC/DC, and DC/AC, wh.ch.is realized by a variety typ.s of p.wer conditioners in th. electric p.wer system. Currently, many concerns are focused on th. op.ration of th.se p.wer conditioners used in distributed energy resources due to th. worse designing may cause th. terrible influence on safety and p.rformance ch.racteristic of distributed energy resources. Th. p.wer quality and reliability of interconnected electric p.wer network may be affected as well. In th. view of th.s, IEEE standards board p.ovides a uniform standard for interconnection of distributed resources with.electric p.wer systems. It p.ovides requirements relevant to th. p.rformance, op.ration, testing, safety considerations, and maintenance of th. interconnection. Based on th. IEEE 1547 standard, th.s p.p.r p.esents a test system for p.wer conditioners th.t are used in distributed energy resources or oth.r renewable energy ap.lications. Some of th. test items th.t described in IEEE 1547.1 relevant to interconnection issues can be realized by p.op.sed test system.

关键词： p.wer Conditioner Distributed Energy Resource IEEE 1547

Oscillation of th.rd-order functional dynamic equations on time scales

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Science Ch.na Math.matics 2011年第12期54卷 2597-2614页

作者： SAKER Samir h. College of Science Research.Centre King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia

We consider th. nonlinear functional dynamic equation （p.t）[（r（t）x^△（t））^△]γ）^△＋q（t）f（x（τ（t））） =0, for t≥t0,on a time scale T, wh.re γ〉 0 is th. quotient of odd p.sitive integers, p. r, τ- and q are p.sitive rd-continuous functions defined on th. time scale 1F, and lirut→∞ τ（t） = ∞. Th. main aim of th.s p.p.r is to establish.some new sufficient conditions wh.ch.guarantee th.t th. equation h.s oscillatory solutions or th. solutions tend to zero as →∞ τ. Th. main investigation dep.nds on th. Riccati substitution and th. analysis of th. associated Riccati dynamic inequality. Our results extend, comp.ement and imp.ove some p.eviously obtained ones. In p.rticular, th. results p.ovided substantial imp.ovement for th.se obtained by Yu and Wang [J Comp.t Ap.l Math. 225 （2009）, 531-540]. Some examp.es illustrating th. main results are given.

关键词： oscillation th.rd-order dynamic equations time scales

Mech.nistic Classification of Cement Treated Base in Western Australia

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Journal of Civil Engineering and Arch.tecture 2012年第8期6卷 1076-1081页

作者： Yang Sh.ng Yeo p. Jitsangiam h. Nikraz Dep.rtment of Civil Engineering Curtin University of Technology Australia

In th. p.st decade alone, th. BITRE h.s indicated an increase of 40% in road users, escalating demands for quality p.vements to service tmp.ecedented traffic conditions. An abundance of crush.d rocks are available in Western Australia but do not meet strength.requirements for road construction. h.wever, cement treatment of crush.d rocks, forming Cement Treated Crush.d Rocks （CTCR）, imp.oves th. mech.nical p.op.rties of th. material, allowing wider ap.lication. In order to streamline th. mix design of CTCR, th. classification of its beh.viour is p.votal. Austroad classifies cement treated p.vement materials as eith.r being modified or bound based on its Unconfined Comp.essive Strength.（UCS） and p.rformance attributes. Bound materials are def＇med by its suscep.ibility to fatigue failure wh.ch. in th. mech.nistic-emp.rical design for flexible p.vements, is dictated by th. flexural modulus. h.wever, in th. study of damage mech.nics, fatigue life is suggested to be an accumulation of micro-scale damage in lieu of dep.ndency to ultimate stresses. Strain dep.ndent damage functions are used p.0}nomologically to exp.ain th. evolution of fatigue for various engineering materials. Th.s p.p.r th.refore investigates a th.oretical relationsh.p.between strain and fatigue life p.ediction sup.orted by a laboratory investigation on th. use of UCS for classification. Th.s is ach.eved by p.oviding regression analysis with.strain p.rameters used in fatigue life p.ediction. Th. Indirect Tensile Strength.（ITS） test is also emp.oyed to th.s end. It is observed th.t strain at onset of micro-cracking coalescence （ε30） is indep.ndent of test typ. undertaken and p.tentially cap.ble of acting as a more sup.rior blanket classification for cemented materials.

关键词： Cement treated materials unconfined comp.essive strength fatigue

Asymp.otic h.rmonic Beh.vior in th. p.ime Number Distribution

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Ap.lied Math.matics 2014年第16期5卷 2547-2557页

作者： Maurice h. p. M. van p.tten Sejong University Seoul South Korea

We consider on x > 0, wh.re th. sum is over all p.imes p. If Φ is bounded on x > 0, th.n th. Riemann h.p.th.sis is true or th.re are infinitely many zeros . Th. first 21 zeros give rise to asymp.otic h.rmonic beh.vio... 详细信息

关键词： p.ime Number Distribution Summation Regularization

Twice Q-p.lynomial distance-regular grap.0} of diameter 4

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Science Ch.na Math.matics 2015年第12期58卷 2683-2690页

作者： MA JianMin KOOLEN Jack h. College of Math.matics & Information Science and h.bei Key Lab of Comp.tational Math.matics & Ap.lications Hebei Normal University Sch.ol of Math.matical Sciences University of Science and Technology of China

It is known th.t a distance-regular grap.0}with.valency k at least th.ee admits at most two Qp.lynomial structures. We sh.w th.t all distance-regular grap.0} with.diameter four and valency at least th.ee admitting two Q-p.lynomial structures are eith.r dual bip.rtite or almost dual bip.rtite. By th. work of Dickie(1995) th.s imp.ies th.t any distance-regular grap.0}with.diameter d at least four and valency at least th.ee admitting two Q-p.lynomial structures is, p.ovided it is not a h.damard grap.0} eith.r th. cube h.d, 2)with.d even, th. h.lf cube 1/2h.2d + 1, 2), th. folded cube?h.2d + 1, 2), or th. dual p.lar grap.0}on [2A2d-1(q)]with.q 2 a p.ime p.wer.

关键词： distance-regular grap. p.or Q-p.lynomial structure tigh.