简介:Bargraphsareconvenientforshowingcomparisonsamongitems.Thebarsmaybeeitherhorizontalorvertical,andtheyareusedtoshowtheamountsofdifferentitems.Figure1isanexampleofatypicalbargraph.ThegraphshowstheaveragesalespriceofexistinghomesintheNortheastUnitedStatesforthreeyears——1970,1980,and1997.
简介:ALMOST800yearsagointheYuanDynasty(1271-1368),astreetrunningnorthtosouthinthehubofthecapitalcity,Beijing,linkedeighthutongstretch-ingfromeasttowest,resemblingfromaboveacrawlingcentipede.ItsnamewasNanluoguxiang.Nowlocatedinthecity'sDongchengDistrict,thetraditionalalley.
简介:Fatiguecuttingisanewapproachforseparatingmaterial.Man-madefatiguecanberealizedbyapplyingarotatingbendingloadtoanotchedbar.Tobetterutilizethenewmethod,lasertreatmentisadoptedinthisstudy.Afterlaserradiationatthenotchroot,thefatiguecycleofthebardropsdramatically.Basedontheexperimentalresult,wedrawtheconclusionthatthefatigueofthebarisinfluencedbytheshapeofthehardenedarea.Ahardenedareathathasasmallaxialdimensionandarelativelylargeradialdimensionfacilitatesthefatigue.Thedesirablehardenedareacanbeobtainedbycontrollingthelasertreatmentparameters.
简介:-BasedonthefeasibilitystudyofdevelopingthenavigationresourcesoftheGuanheRiverandthemodeltestresultsofthemouthbarregulation,thispaperpresentssomebasicprinciplesfortheregulationofthechannelonthemouthbar,forinstance,thedirectionofnavigationchannelshouldbeidenticalwiththatoftheebbtidecurrentandthemainwaves,andperpendiculartothebathymetriccontours.Theprinciplesforregulatingmouthbarsarealsodiscussedinthispaper.
简介:Fromthebeginningof1970’s,theresearchworkonstrandcurrentdistributioninhydro-generatorstatorbarshasbeenmademarkedprogressinChina.Inordertoknowwhythegeneratorbarinsulationswerebrokendownsooftenbothinop-erationandintestingafterthegeneratorsbeingputintooperationfor8-10yearsatXinanjiangHydropowerStation.Investigationswereconductedandtheresultsoffieldmeasurementshowedthatthe
简介:Inthispaper,thestabilityofaconcavesphericalstembulkheadunderthepumpingloadwhenstilllyingattheslipwayisanalyzed.Thestabilityofthesphericalstembulkheadwithdifferentshellthicknessandreinforcingformsisdiscussed.Accordingtotheresultsofstabilityanalysis,theoptimizationdesignofthesphericalstembulkheadstabilityisperformed.Onthebasisofconsideringthemachiningtechnicalrequirementsofthebulkhead,arationaldesignofthesphericalstembulkheadstructureisobtained.Thispaperhasacertainvaluetothedesignofsubmarine'ssphericalstembulkhead.
简介:摘要:随着社会不断的进步与发展,城市的幼儿教育是得到了非常明显的提高,而其中对于农村的教育,教育部也进行了大量的改革,积极的倡导家园共育这一理念,培养幼儿良好的学习品质是有非常大的帮助,因此本文对于城市中的幼儿教育与农村中的幼儿教育进行比较以及农村家园共育培养幼儿良好学习品质模式进行分析与讨论,从而为关注这一话题的人们提供参考。