简介：TheSteckelmill,alongestablishedsolutionfortheeconomicalproductionofrelativelysmallvolumesofhotrolledstrip,hasbeenrejuvenatedinrecentyearsbyarangeofnewapplications,boostedbytheneedofimprovingtheenergeticefficiencyoftherollingprocess.ThetraditionaladvantagesoftheSteckelmillintermsofflexibilityandreducedcapitalandoperationalcostsarenowenhancedbytechnologicaldevelopmentsthathavesignificantlyexpandeditsapplicationrangeintothecombinedproductionofstripandplateandimprovedtheproductquality.Theincreasedawarenessofthenecessityofasustainablegrowthinthesteelindustryhasstimulatedthedevelopmentofprocesssolutionswithanimprovedefficiencyintheuseofnaturalresources,lowercarbonemissionsandincreasedyield.ModernSteckelmillsareanadequateresponsetothetrendtowardslowenergystripandplateproduction,inparticularintheirplate-Steckelmillvariant.SiemensVAIhaveplayedakeyroleintheinnovationandtransformationoftheSteckelmillconcept,withanumberofrecentinstallations,presentedinthispaperfromthepointofviewoftheircontributiontothedevelopmentofgreenersteelrollingtechnologies.

简介：Inthispaper,thecontrolpolicyforenvironmentwithtwokindsofirreversibility,whichworkinoppositedirectionsanduncertaintyofcostisregardedasaninvestmentdecision.Byusingreal-optiontheory,thepaperpresentsthemodeloftheoptimalcontrolpolicyforenvironmentunderthescienceandtechnologythatcanreduceenvironmentpollutionstochasticoccur.Thepaperhasdiscussedtheeffectsofchangesinthevariousparametersonthecriticalvalueatwhichthepolicyshouldbeadopted.Theresultsshowthattheoptimalcontrolpolicyisquitesensitivetothescienceandtechnologywhichcanreduceenvironmentpollutionstochasticoccur,pointingtotheimportanceofcarefullyaccountingforitsimpactindeterminingthecontrolpolicyforenvironment.

简介：Thereadoutintegratedcircuit(ROIC)technologyisoneofthecriticaltechnologiesintheresearchofaninfraredfocalplanearray(IRFPA).Basedonthevirtualinstrumenttechnology,asystemforparametertestofROICisdevelopedforIRFPA.Thecomplexprogrammablelogicdevice(CPLD)isappliedintothesystemtoincreaseitsflexibility.Withhighreliabilityandprecision,alongwiththeintegratedsoftwareandhardwareenvironment,thesystemcantestallkindsofROICs.

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简介：TheLihuayiGrouphasselectedthelow-pressureoxosynthesistechnology(LPOxo)licensedbyDow/Davytoconstructa250kt/aunitinDongying,Shandongprovince.Thisunitwhichaimstomanufacture140kt/a2-ethylhexylalcohol,85kt/an-octanoland24.4kt/aisobutanolwillcomeonstreamin2010.

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简介：　　ItislearnedfromtheMinistryofScienceandTechnologythatinordertopromotetheshiftofChina'schemicalindustrytowardanenergyefficientandenvironmentallyfriendlyproductmode,thetechnologyforintensificationofchemicalreactionprocesseshasbeenincludedintheNational"863"Projectofthe"EleventhFive-YearPlan",andtheapplicationforresearchprojectproposalsistobeaccepted.……

简介：Sincethe2050mmhotstripmillwasputintooperationin1989,Baosteelhasmadegreatachievementsinincreasingproductivity,developingnewprocesstechnologiesandsteelproductsandimprovingproductquality.Inthepast18yearsfrom1989to2007,Baosteelhasconstructedfivehotstripmillswithatotalannualcapacityof19.8Mt.Indicesfortechnologystandards,productcategoriesandsteelgrades,productquality,bothtechnicallyandeconomically,taketheleaddomesticallyorreachedtheworldclasslevel.Astherearemanyhotstripmillsthatexpectedtobeputintooperationbytheendof2010,theoverallannualcapacitywillexceed30Mt,andtheproductwillcovergrainoriented(GO)Sisteelsandalloyedsteels.

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简介：ThisstudydescribesanoverviewofthePOSCO'sBaosteel'sshort-flow(BSSF)slagprocessingproject,includingprocessflow,processset-up,equipmentcomposition,auxiliaryfacilitiesandrelevantparameters,aswellasabriefdescriptionofitsapplicationaftercommissioning.

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简介：利用不同浓度的秋水仙碱和不同处理方式来处理毛白杨及其杂种毛新杨的雄花芽，可以获得一定比率的染色体未减数的大花粉粒．用细胞荧光测定技术测定其ＤＮＡ相对含量，鉴定了这种大花粉粒为２ｎ花粉粒．这种２ｎ花粉粒是具有生活力的，可用于授粉杂交来培育三倍体．在温度较低的条件下，当秋水仙碱浓度为０．１％～０．５％时，注射处理花芽３～６次效果最佳．对高温（３８～４０℃）处理花芽诱导２ｎ花粉粒的方法也进行了试验和分析．

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简介：IntroductionThehydropowerandwindpowerbeingthekindsofre-newableenergythatarerelativelyrichinresourcesbutarere-strictedlargelybythelocality.Onthecontrary,photovoltaicpowerislessrestrictedbythelocalityoftheresources,andissafe,reliable,noiseless,non-pollutant,andneedsneitherfuelconsumptionnortheerectionoftransmissionfacilities,itmayberealizedrightinplacesofconsumptioninlargeorsmallscale

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简介：ReviewonthedevelopmentofrefractoriestechnologyinChina'sironandsteelindustryduringtheperiodof"theninthfive-yearplan"hasbeenmade.Somesugges-tionsandopinionsonthefuturedevelopmentofrefractoriesscienceandtechnologyinChinahasbeenputforward,includingfullutilizationofdomesticrichresourcesofrefrac-toryrawmaterialstodevelopsophisticatedsyntheticrefrac-toryrawmaterialswithChinesecharacteristicsandtheR&Donhigh-techrefractoryproductsformeetingtherequire-mentofthedevelopmentofnewmetallurgicaltechnology.

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简介：为软件开发基于一个新DIY概念，在当有限元素程序生成器(FEPG)提供发展的一个平台，叫的一个软件系统上依附的一种自动产生节目的技术编程序，通过哪个一个科学研究人员能为解决方案以一个更直接、方便的方法提交他的特殊physico数学的问题到系统。为由使用有限元素方法解决流动和热问题，稳定技术和部分步方法被采用克服主要由于统治传送对流引起的数字困难。几个基准问题作为例子在这份报纸被给说明用法和自动程序产生技术的优势，包括在一个盖驱动的洞的流动，在一根圆形的管子中的开始的流动，在一个方形的洞的自然传送对流，并且经过圆形的柱体的流动，等等。他们也作为算法的确认被给看。