简介:介绍Sybasee-MapforPowerBuilder策略,探讨基于PowerBuilder的C/S应用及组件向B/S分布式应用的转换方法。
简介:Inthispaper,adiscussiononthenewpolynomial-timealgorithmforlinearprogrammingasproposedbyKarmarkar.N.ispresented.Theproblemissolvedwhenaninitialfeasiblesolutionisunknown.Forthecasewheretheoptimumvalueoftheobjectivefunctionisunknown,thereasonablenessandfeasibilityoftheslidingobjectivefunctionmethodareproved.Andamethodofmodifyingtheparametersisputforward.
简介:对16份云和雪梨(Pyruspyrifolia)种质进行了S-RNase基因部分核苷酸片段的PCR扩增和测序,通过BLAST进行基于核苷酸序列的同源性分析以确定S基因类型,并确定各样本的S基因型.结果显示:15份种质的S基因型完全一致,2个位点与S4和S19的同源性分别均为100%,因此,其基因型为S4S19;而真香梨中的一个S基因为S19,另一个则与S5a和S41同源性分别为98%和100%,因此,真香梨的S基因型为S19S41(S19S5a).这3个S基因中,S4和S19分别在砂梨和白梨中频率最高,而S41(S5a)仅在秋子梨(P.ussuriensis)和西方梨种(P.pyraster)中广泛存在.研究结果为云和雪梨授粉品种选择和遗传育种提供了依据.
简介:HEMINGWAY’sstory,“HillsLikeWhiteElephants”,isaboutlovingrelationshipsbetweenanAmericanmanandagirl.Aslovers,theyarein-timate,withthegirlinthestateofpregnancy.Thestoryistoldfromtheobjectivepointofview.Ittakesplaceduringa40-minutewaitbetweentrains.Whatliesbehindthemisindicatedbythelabelsontheirbags.Whatliesaheadofthemimpliesentireforceanddir-ectionofthestory.Itisatthestationthatadecisionwillbemadethat