简介:Thispaperpresentsanautomaticimage-basedapproachforconvertinggreyscaleimagestopencilsketches,inwhichstrokesfollowtheimagefeatures.ThealgorithmfirstextractsadensedirectionfieldautomaticallyusingLogical/Linearoperatorswhichembodythedrawingmechanism.Next,areconstructionapproachbasedonasampling-and-interpolationschemeisintroducedtogeneratestrokepathsfromthedirectionfield.Finally,pencilstrokesarerenderedalongthespecifiedpathswithconsiderationofimagetoneandartificialillumination.Asanimportantapplication,thetechniqueisappliedtorenderportraitsfromimageswithlittleuserinteraction.Theexperimentalresultsdemonstratethattheapproachcanautomaticallyachievecompellingpencilsketchesfromreferenceimages.
简介:INTRODUCTIONItiscommonknowledgethatthedevelopmentandoccurrenceofanearthquakeisaverycomplicatedgeophysicalprocess.Anearthquakeiscausedbythelocalfailureoftheearthcrustmedium,andearthquakesaredistributedinhomogeneouslyinspace.Seismicactivities,however,arearealreflectionoftheinteractionofthefaults,whichprovidesussomeinformationconcerningtheearthcrustmediumandmayhelpuspredicttheearthquake.Therefore,thestudyoftheseismicitypatterncanbecomeameansofearthquakeprediction.Inordertoreflectdirectlythespacialdistributionofseismicactivities,thesketchofepicentraldistributionhasbeenwidetyusedinthestudy
简介:HeBinglinwasbornonAugust24,1918inFanyuCounty,GuangdongProvince.HegraduatedfromtheChemistryDepartmentofSouthwestAssociatedUniversityin1942.AftergraduationheworkedinChongqingCentralInstituteofIndustryforoneyearasanassistantengineerandthenreturnedtohisAlmaMaterUniversity
简介:摘 要:随着国际化的进一步发展,学术与国际接轨已成为日前的一大重要议题。英文作为目前国际上广泛使用的语言,目前在学术发表中扮演着机器重要的角色,相比较传统的英文文献汉译,将中国优秀科学成果英译,甚至学生、研究者直接使用英语进行学术写作变得日益重要。为满足学术英语在严谨性方面的要求,许多大学都开展了学术英语写作的相关课程。本文旨在为学术英语词汇使用教学方面提供一种新的思路,即使用Sketch Engine辅助学生学习英语学术写作词汇使用,从而更地道、准确地进行学术创作和表达。