简介：ＢｏｘｔｈｏｒｎＦｒｕｉｔＴｈｅｂｏｘｔｈｏｒｎｆｒｕｉｔ（ＦｒｕｃｔｕｓＬｙｃｉｕｍ）ｉｓａＣｈｉｎｅｓｅｔｒａｄｉｔｉｏｎａｌｍｅｄｉｃｉｎｅｆｏｒｒｅｇｕｌａｒｕｓｅａｎｄａｌｓｏａｈｅａｌｔｈｐｒｏｄｕｃｔｗｉｔｈｎｕｔｒｉｅｎｔｓ．Ｉｔｈ...

简介：PricesoflightrareearthproductsinBaotouroseonthefullscaleinJuly.PriceoflanthanareachedRMB12,000-13,000/t,thatofceriaRMB12,000/t,praseodymiaRMB70,000-72,000/t,Pr-NdoxidesRMB52,000/t,neodymiaRMB65,000/t.DespitethehighpriceofPr-Ndoxidesandneodymia,nogoodsareavailableathand.PricerisingisattributedtoenforcementofenvironmentalprotectionpolicyandheighteningprojectsuspendingofBaogangtailingsdam.REseparationenterprisesalongYellowRiverhave...

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简介：Asournationaleconomycontinuestodevelop,weproducealargevarietyofproducts.AUkindsofgoodssatisfytheneedsofthepeople.Butitisapitythatmanypeopleignorethequalityoftheproducts.Asaresult,manyfakeandinferiorgoodscanbeseeneverywhere.

简介：ThestarchromaticnumberofagraphwasintroducedbyA.Vince,whichisanaturalgeneralizationofthechromaticnumberofagraph.Inthispaper,thestarchromaticnumbersofgraphproductsG(×)Harediscussedinsomespecialcases.

简介：FollowingtheChinesemarketopeningtotheworld,manyinternationalfamousbrandproductshaveenteredit,creatingagravechallengetoChineseenterprises.Nowtheyhaveresolvedtocreatefamousbrandproductstocompeteontheinternationalmarket.SofamousbrandproductsarenowbeingcreatedinBeijing.Sincethereformandopenpolicy

简介：Chinahashad30yearsexperienceintitaniumresearch,development,productionandappli-cationsofar.ItwasreallyaroughandbumpyroadfordevelopingTiworkingindustry,however,sincealargeamountofworkwasdoneandgreatmanyachievementswereobtainedbythescien-tistsandengineersinthisfield,afirmbaseofTiworkingindustryhasbeenestablishedinChinaatlast.Especiallysincethebeginningof1980s,ithasbeendevelopedtoanewlevel.Onthesebases,afavourableconditiontospeedupthedevelopmentofTiworkingindustryarisesinChina.

简介：本文所讨论的积图是图的笛卡尔积，图的张量积，图的逻辑积和图的强直积四种积图．证明了：①如果Ｇ１和Ｇ２都是连通图，则积图中笛卡尔积，逻辑积和强直积都是道路正图．②图的张量积是道路正图的是图Ｇ１和Ｇ２是一个连通图，Ｇ１［或Ｇ２］有一个奇圈，且ｍａｘ｛λ１μ１，λｎμｍ｝≥２，其中λ１和λｎ［或μ１和μｍ］分别是图Ｇ１或Ｇ２的最大和最小特征值

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简介：Manydynamicoptimalcontrolmodelsforadvertisingmakeeffortstosolvetheproblemofdeterminingoptimaladvertisingexpendituresandothervariablesofinterestovertimeforafirmorseveralcompetingfirms,However,afteranalyzingtheextantliterature,onecanfindthatfewdynamicoptimaladvertisingmodelsavailableconsidertheproblemwithintheproductdiffusionframework.Furthermore,theestablishedmodelsinvolvingproductdiffusionareinspiredbytheBassmodel,whichhasbeenoutofdate.Thispaperposesadynamicoptimaladvertisingmodelfornewproducts,whichconsiderstheproductdiffusionbasedontherelativenewlydevelopedgeneralizedversionoftheBassmodel.Inthispaper,theoptimalcontrolmodelisusedtoderivetheoptimaladvertisingexpenditurepolicy,whichgivessomeimplicationstoadvertisingpractice.

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简介：Adoptingaprincipleof“check-acceptforthefirstrank,inspectionforthesecondrank”,thispaperbrieflydiscussestherationaleofthesamplinginspectionandthesamplinginspectionschemestodigitalproductsinGIS.TheOCcurveisdrawntoexplainthedeficiencyofthepercentsamplinginspection.Meanwhile,themethodofOneTimeLimitingQualityofcountselectionispresentedastheinspectionschemeforproductiondepartmentswhilethemethodofOneTimeAfter-inspectionMeanPercentDefectiveUpperLimitofcountselectionisforacceptancedepartments.

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简介：ＦｌｕｃｔｕａｔｉｏｎｏｆＥｘｃｉｔａｔｉｏｎＦｕｎｃｔｉｏｎｓｏｆＤａｍｐｅｄＰｒｏｄｕｃｔｓｏｆＩｄｅｎｔｉｆｉｅｄＩｓｏｔｏｐｅｓ￥ＷａｎｇＱｉ；ＬｕＪｕｎ；ＸｕＨｕｓｈａｎ；ＬｉＳｏｎｇｌｉｎ；ＺｈｕＹｏｎｇｔａｉ；ＹｉｎＸ...

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简介：8.JiDaiyu,GeneralManagerofBaotouXinyuanRareEarthHi-TechMaterialsCo.LtdControlgrosstostabilizeprices.Chineserareearthispreciousstrategicresource.Themoreitisexploit,thelessitwillbe.TheStatehasputforwardrareearthpolicyof"strengthenmanagement,protectresource,developscientificallyandfaceinternational".Chineserareearth