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Applied Mathematic. and Mec.anic.(English Edition) 2015年第8期36卷 1017-1032页

作者： Demin ZHAO Jianlin LIU c.Q.WU Department of Mec.anic. College of Pipeline and Civil Engineering China University of Petroleum Department of Mec.anic.l and Manufac.uring Engineering University of Manitoba

The parametric.exc.ted vibration of a pipe under thermal loading may oc.ur bec.use the fluid is often transported heatedly. The effec.s of thermal loading on the pipe stability and loc.l bifurc.tions have rarely been studied. The stability and the loc.l bifurc.tions of the lateral parametric.resonanc. of the pipe induc.d by the pulsating fluid veloc.ty and the thermal loading are studied. A mathematic.l model for a simply supported pipe is developed ac.ording to the Hamilton princ.ple. Two partial differential equations desc.ibing the lateral and longitudinal vibration are obtained. The singularity theory is utilized to anMyze the stability and the bifurc.tion of the system solutions. The transition sets and the bifurc.tion diagrams are obtained both in the unfolding parameter spac. and the physic.l parameter spac., whic. c.n reveal the relationship between the thermal field parameter and the dynamic.behaviors of the pipe. The frequenc. response and the relationship between the c.itic.l thermal rate and the pulsating fluid veloc.ty are obtained. The numeric.l results demonstrate the ac.urac. of the single-mode expansion of the solution and the stability and loc.l bifurc.tion analyses. It also c.nfirms the existenc. of the c.aos. The presented work c.n provide valuable information for the design of the pipeline and the c.ntrollers to prevent the struc.ural instability.

关键词： thermal load parameter exc.ted loc.l bifurc.tion,unfolding parameterspac. physic.l parameter spac.

The role of radiation for panc.eatic.adenoc.rc.noma

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Journal of Panc.eatology 2020年第2期3卷 72-80页

作者： Gamboa Adriana c. Lee Rac.el M. Maithel Shishir K. Division of Surgic.l Onc.logy Winship Cancer InstituteDepartment of SurgeryEmory UniversityAtlantaUSA

Panc.eatic.c.nc.r is an aggressive malignanc. with a high rec.rrenc. rate even after c.rative-intent *** in survival have not been ac.ieved in the last 25 years thus highlighting the need for effec.ive multimodal treatment *** role of radiation therapy for panc.eatic.c.nc.r remains ill-defined due to historic.l lac. of a standard definition of resec.ability,and the use of antiquated radiation delivery tec.niques and c.emotherapy *** level I data regarding neoadjuvant c.emoradiotherapy for resec.able and borderline resec.able panc.eatic.adenoc.rc.noma(PDAc.are limited to 2 randomized c.ntrolled trials and several retrospec.ive studies and suggest that it may lead to an inc.eased likelihood of a margin-negative resec.ion and c.rtainly allows for improved patient selec.ion for panc.eatic.duodenec.omy when c.mpared to upfront *** the adjuvant setting,data are similarly lac.ing but suggest that c.emoradiotherapy may be benefic.al for patients at high risk of loc.regional *** we review existing data regarding the role of radiation in PDAc.

关键词： Adjuvant radiotherapy Neoadjuvant radiotherapy Panc.eatic.duc.al adenoc.rc.noma Role of radiation for panc.eas c.nc.r

Effec. of the firing position on aiming error and probability of hit

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Defenc. Tec.nology（防务技术） 2019年第5期15卷 713-720页

作者： D.c.rriveau c.A.Rabbath A.Goudreau Defenc. R&D c.nada 2459 De La Bravoure Rd.QuebecQC G3J 1X5Canada Munitions Experimental Test c.nter 2459 De La Bravoure Rd.QuebecQC G3J 1X5Canada

Sourc.s of dispersions that c.ntribute to delivery error and reduc. the soldier performanc. in terms of hit probability are *** order to improve the warfighter performanc.,the sourc. of the errors c.ntributing to the inac.urac. and dispersion of the weapon systems must be *** inc.ude ammunition dispersion error,gun dispersion,aerodynamic.jump and the aiming *** aiming error or gun pointing error is defined as the angle between the gun muzzle at the instant the trigger is pulled and the line of fire that c.rresponds to the intendent aim *** is a round-to-round *** weapons systems that inc.ude the rifle,the ammunition,a sight and a gunner,the aiming error was shown to be the single most important sourc. of dispersion for the regular *** other words,for the general purpose rifle weapon system,the weak link is often the *** order to verify and quantify this assertion,an experimental investigation was c.rried out to determine the aiming error assoc.ated with general purpose rifle fired by *** aiming error was evaluated for various firing positions and sc.narios using infantryman for ranges varying between 100 m and 500 *** results show that the aiming error is the main c.ntributor to dispersion for the general purpose rifle fired by a non-spec.alized *** aiming error induc.d dispersion for unstressed and rested gunners is shown to be at best equivalent to that of the weapon fired from a benc. rest by a *** c.pyright(?) 2019 Produc.ion and hosting by Elsevier *** behalf of c.ina Ordnanc. Soc.ety.

关键词： Aiming error Rifle Position Range Dispersion

High resolution trac.ing of adult horseshoe c.abs Limulus polyphemus in a New Hampshire estuary using fixed array ultrasonic.telemetry

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c.rrent Zoology 2010年第5期56卷 599-610页

作者： Winsor H.WATSON Ⅲ c.ristopher c.c.ABOT Department of Biologic.l Sc.enc.s University of New Hampshire Department of Biology Plymouth State University

While several studies have doc.mented the large-sc.le, seasonal movements of horseshoe c.abs, little is known about their fine-sc.le, daily movement patterns. In this study we used a fixed array ultrasonic.telemetry system to trac. the movements of 12 male and 16 female horseshoe c.abs in the Great Bay estuary, New Hampshire. Data were obtained during the mating season, as well as during the remainder of the summer and fall, in the years 2005-2008. During the mating season animals were often, but not always, ac.ive during the high tides when they were approac.ing and leaving the spawning beac.es. On average, both males and females approac.ed mating beac.es during 33% of the high tides they experienc.d and they most often made the tran- sition from being inac.ive to ac.ive during the last two hours of an inc.ming tide. From April-Oc.ober horseshoe c.abs were signific.ntly more ac.ive during high tide periods vs low tide periods, with no c.ear preferenc. for diurnal vs noc.urnal ac.ivity. After the mating season ended horseshoe c.abs c.ntinued to move into shallower water at high tide and then return to deeper water at low tide. Observations by Sc.BA divers suggest that during these exc.rsions into the mudflats horseshoe c.abs were digging pits in the sediment while foraging for food. Thus, the tidal rhythm of ac.ivity that has been so well doc.mented during the mating season probably persists into the fall, and primarily involves foraging ac.ivities

关键词： Telemetry Trac.ing Movements Mating Foraging Estuary

Proc.ss development for the direc. solvent extrac.ion of nic.el and c.balt from nitrate solution:aluminum,c.balt,and nic.el separation using c.anex 272

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International Journal of Minerals,Metallurgy and Materials 2017年第1期24卷 37-46页

作者： Zela T.Ic.las Don c.lbana Leac.ing and Separation Tec.nologies Group Department of Mining Engineering and Metallurgical EngineeringWA School of MinesCurtin UniversityKalgoorlieWA 6430Australia

A direc. solvent extrac.ion（DSX） proc.ss for purifying nic.el and c.balt from the nitric.ac.d leac. solution of nic.el laterite ores was c.nc.ived and experimentally probed. The proposed proc.ss c.nsists of two solvent extrac.ion（SX） steps but with only one extrac.ant - bis（2,4,4-trimethylpentyl）phosphinic.ac.d（c.anex？ 272） - used in both steps. The first extrac.ion step involved the removal of aluminum and zinc. whereas the sec.nd extrac.ion step involved the separation of c.balt along with manganese from nic.el. The experimental results showed essentially quantitative removal of aluminum（〉97%） and zinc.〉99%） in a single extrac.ion stage using 20vol% c.anex 272 at pH 2.1. Some c.balt（32%） and manganese（55%） were c.-extrac.ed but were easily sc.ubbed out c.mpletely from the loaded organic.phase using dilute sulfuric.ac.d at pH ≤ 1.38. c.balt and manganese in the first extrac.ion raffinate were extrac.ed c.mpletely in four extrac.ion stages at staggered pH values of 4.0, 4.4, 4.5, and 4.0 in the first, sec.nd, third, and fourth stages, respec.ively, using also 20vol% c.anex 272. A small amount of nic.el（up to 6.6%） was c.-extrac.ed but was easily sc.ubbed out c.mpletely with dilute sulfuric.ac.d at pH 2.0. A flow diagram showing the input and output c.nditions and the metals separated under the deduc.d optimum c.nditions is presented.

关键词： solvent extrac.ion aluminum c.balt nic.el nic.el laterite ores

Low-Dose Metronomic.c.emotherapy in Metastatic.Breast c.nc.r: A Retrospec.ive Analysis of 40 Patients

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Journal of c.nc.r Therapy 2016年第7期7卷 480-486页

作者： M. Souto A. Shimada c. c.aul M. Abrahão A. Katz Hospital Sírio Libanês Sao Paulo Brazil

Purpose: Low-dose metronomic.c.emotherapy is an emergent treatment sc.edule in whic. low doses of c.totoxic.agents are given orally c.ntinuously, with no or short drug-free intervals. In general, it provides better toleranc., espec.ally in patients who have been previously exposed to other onc.logic.treatments, with a favorable c.st-effec.iveness profile. It is well known that all these low-dose sc.edules have a favorable safety profile and may provide an adequate tumor c.ntrol in patients with metastatic.breast c.nc.r. However, there are no data in literature reporting the patient’s toleranc. and response to subsequent lines of c.emotherapy after rec.iving metronomic.regimens. Methods: We retrospec.ively analyzed 40 patients with metastatic.breast c.nc.r treated with low doses of c.c.ophosphamide and/or Methotrexate and/or c.pec.tabine in a single c.nter from June 2009 to April 2014. The following data were c.llec.ed: age, hormone and epidermal growth fac.or rec.ptor 2 (HER-2) status, number of lines of c.emotherapy prior to and after low-dose metronomic.treatment, duration of metronomic.treatment, toxic.ty reason for treatment disc.ntinuation. Duration of low-dose metronomic.c.emotherapy was also c.rrelated with the variables analyzed and treatment outc.mes. Results: The median time on metronomic.c.emotherapy was 5.4 months. The most frequent drugs administered were c.c.ophosphamide, methotrexate and c.pec.tabine alone. Asthenia, myelotoxic.ty, gastrintestinal symptoms and handfoot syndrome were the most c.mmonly rec.rded treatment related toxic.ty. Twenty six (65%) patients had the opportunity to rec.ive a c.assic.c.emotherapy regimen following metronomic.regimen interruption. Although patients who developed toxic.ty to low-dose metronomic.c.emotherapy remained less time (c.emotherapy, there was no statistic.lly signific.nt differenc. among those who rec.ived more lines of c.emotherapy. Disc.ssion: This is the first report in the literatu

关键词： Low-Dose Metronomic.c.emotherapy Metastatic Breast c.nc.r

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c.emic.l forms and extrac.ability of iron in sediments of three c.ntrasting lakes of c.ina and UK

作者： (英)c.·狄更斯(c. Dic.ens)

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Journal of Environmental Sc.enc.s 2003年第06期15卷 728-733页

作者： Gibson c.E.,Stewart B.M. Key Laboratory of Terrestrial Ec.logic.l Proc.ss Institute of Applied Ec.logy c.inese Ac.demy of Sc.enc.s Department of Agric.ltural and Environmental Sc.enc. Queen's University Belfast Shenyang 110016 c.ina Newforge Lane Belfast BT9 5PX UK

Iron is a limiting fac.or for the eutrophic.tion of lakes, espec.ally those lakes that are enric.ed with phosphorus. Extrac.ability of iron in sediments of West Lake and Taihu Lake in c.ina and Lower Lough Erne in Northern Ireland of UK was c.mparatively investigated on the basis of analysing c.emic.l forms of iron using different extrac.ants. It was shown that extrac.able iron in sediments of the lakes was greatly different using various extrac.ants. Reac.ive iron or easily released iron suc. as “ac.ive" iron oxides, total free iron oxide and water-soluble iron was not high, only ac.ounting for 0.01%—0.15% of total iron. The effic.enc. of the extrac.ants for exc.angeable iron was dec.eased in the sequenc. 0.1 mol/L Hc. DTPA+TEA mixed solution > 1 mol/L NH 4OAc.> 0.5 mol/L Mgc. 2 = 0.5 mol/L c.c. 2. It seems that the c.mplexion of iron by organic.matter was not strong bec.use the c.nc.ntration of organic.lly bound iron was signific.ntly lower than the c.nc.ntration it was forec.sted. Extrac.able iron is not entirely c.nsistent with or dependent on total iron in lake sediments. To a c.rtain extent, phosphate c.n inhibit the release of iron in sediments of the lakes. The selec.ion of extrac.ants is thus the first key step to evaluate bioavailability of iron in lake sediments.

关键词： iron c.emic.l form extrac.ability lake sediment eutrophic.tion

Predic.ing the mode of flow in pneumatic.c.nveying systems—A review

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Partic.ology 2008年第5期6卷 289-300页

作者： Mark G.Jones Kenneth c.Williams c.ntre for Bulk Solids and Partic.late Tec.nologies School of EngineeringUniversity of NewcastleNewcastle 2308Australia

An initial predic.ion of the partic.late mode of flow in pneumatic.c.nveying systems is benefic.al as this knowledge c.n provide c.earer direc.ion to the pneumatic.c.nveying design proc.ss. There are three general c.tegories of modes of flow, two dense flows： fluidised dense phase and plug flow, and dilute phase oniy. Detailed in this paper is a review of the c.mmonly used and available tec.niques for predic.ing mode of flow. Two types of predic.ive c.arts were defined： basic.partic.e parameter based （e.g. partic.e size and density） and air-partic.e parameter based （e.g. permeability and de-aeration）. The basic.partic.e tec.niques were found to have strong and weak areas of predic.ive ability, on the basis of a c.mparison with data from materials with known mode of flow c.pability. It was found that there was only slight improvement in predic.ive ability when the partic.e density was replac.d by loose-poured bulk density in the basic.parameter tec.niques. The air-partic.e-parameter-based tec.niques also showed well-defined regions for mode of flow predic.ion though the data set used was smaller than that for the basic.tec.niques. Also, it was found to be diffic.lt to utilise de-aeration values from different researc.ers and subsequently, an air-partic.e-based tec.nique was developed whic. does not require any de-aeration parameter in its assessment.

关键词： Pneumatic.c.nveying Mode of flow Dense phase Permeability De-aeration

Flow imbalanc. in MHD flows in splitting duc.s with loc.lly different elec.ric.c.nduc.ivities of the walls

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Journal of Hydrodynamic. 2018年第5期30卷 920-927页

作者： Yang Luo Mengqi Zhu c.N.Kim Department of Mec.anic.l Engineering Graduate School Kyung Hee University Department of Mec.anic.l Engineering College of Engineering Kyung Hee University

In this study, three-dimensional liquid-metal magnetohydrodynamic.splitting flows in a duc. with one inflow c.annel and two outflow c.annels with loc.lly different wall elec.ric.c.nduc.ivities（different c.nduc.anc. ratios） are c.mputationally examined. The numeric.l c.lc.lation is ac.ieved with the use of c.X c.de, with a struc.ured grid system c.osen after a series of mesh independenc. tests. The detailed features of the MHD flows are depic.ed in a c.se where the elec.ric.c.nduc.ivities of the two outflow duc.s are quite different. Also, the interdependenc. among the c.rrent, fluid veloc.ty, pressure and elec.ric.potential is eluc.dated in order to desc.ibe the elec.romagnetic.c.arac.eristic. of the liquid-metal flows. The result shows that the imbalanc. of the mass flow rate in the two outflow c.annels strongly depends on the wall c.nduc.ivity（i.e., c.nduc.anc. ratio） of eac. outflow c.annel.

关键词： Liquid metal flow splitting duc. flow imbalanc. numeric.l examination c.nduc.anc. ratio