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51.
探讨了一个新的参量化的全平面Hobert积分不等式:建立2个权函数,运用带权的Holder不等式,应用实分析技巧,引入非零的独立参量以及满足关系参数,得到一个新的全平面非齐次核的具有最佳常数因子K(O)且含中间变量的Hilbert型积分不等式及其等价式和特殊参数下的齐次与非齐次核不等式 相似文献
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R. H. Liu* Q. Zhang* 《系统科学与复杂性》2001,(2)
1 IntroductionMarkov decision processes (MDP) have drawn much sttention because of their capabilityin dealing with a wide range of application under UnCertainty. Many problems in operationsresearch such as resource allocation, queueing networks, and maChine replaCement etc., fit wellin the framework of Markov decision processes. Classical aPProaChes of discrete-time MDPmodels can be foUnd in Dermanll], RDssIZ], and ~e[3] among others.Because most of the systems in real life are large a… 相似文献
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星*宝贝 《大众科学.科学研究与实践》2002,(2)
66岁的她静静地站着。“这是我在这个世界里的最后一天了,等到今天过去,我会永远的离开这个世界。”她这样想着,并留恋地看着自己的影子、自己亲手一砖一瓦建起来的城邦和曾经每天陪着自己练功的那150个女仆。“不要再想了,都已经决定了的事。”她勉强地给自己一个笑容。“直的决定了吗?”他问。 相似文献
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ZHU Huanzhang* CHEN Xiaoguang* LI Feng GONG Juli & XUE Jinglun State Key Laboratory of Genetic Engineering Institute of Genetics School of Life Sciences Fudan University Shanghai China *The authors made equal contributions to this report. Correspondence should be addressed to Xue Jinglun 《科学通报(英文版)》2003,48(20)
Hemophilia B, a serious bleeding disorder, is an inherited X chromosome-linked disease for the deficiency or inactivity of human clotting factor Ⅸ (hFⅨ). Though factor substitution therapy has greatly improved the lives of hemophiliac patients, there are still limitations to the current treatment, which have triggered interest in alternative treatments by gene therapy[1]. Based on preclinical studies in rabbits[2], our lab had first initiated an ex vivo gene therapy clinical trial whereby a… 相似文献
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Bioremediationisaformofbiotechnologyhavingthecharacteristicsoflowenergyconsumption ,highefficiencyandhighenvironmentalsafety ,whichcandegradeandremoveenvironmentalpollutantsbythephysicalmetabolismofthebacteria ,fungi,higherplantsandcellularfreeenzymes.Inabroadsense ,bioremediationconsistsofthreemaincategories ,namely :themicrobialremediation ,thephytoreme diationandthecellularfreeenzymeremediation .Asachallengingleadingedgetechnology[1] ,bioremedia tionhasmovedintoaflourishingera .Itisanticipa… 相似文献
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Plankton from Early Cambrian black shale series on the Yangtze Platform, and its influences on lithologies 总被引:2,自引:0,他引:2
Blackshalesandcherts ,containingnodularphosphoritesandorelayers[1] arecommonintheEar lyCambriandeeperwaterfaciesoftheYangtzePlat form[2 ] andoffera goodchanceformicropaleonto logicalresearchusingtechniquesofchemicaldissolu tion ,peelingandsectioning .Wetriedtoseparateandinvestigateoceanicplanktoncommunitiesfrombitu minous,“deeperwater”chert ,blackshale andphosphoritelithologies ,andtodocumenttheirpreser vationandinfluencesonthecompositionofthesedi ments .Thepresentpaperaimsatgivingareportof… 相似文献
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分形几何方法在复杂裂缝系统描述中的应用 总被引:2,自引:0,他引:2
探讨了利用分形几何方法来定量描述复杂非系统裂缝的分布.以高精度岩心扫描图像为基础,首先计算了岩心复杂裂缝的分数维D值,然后进一步分析了这些复杂裂缝的分数维与裂缝的面密度、孔隙度、渗透率之间的关系,发现复杂裂缝系统的面密度、孔隙度、渗透率随裂缝分数维D值呈指数函数增大的规律.裂缝的分数维D值不仅可以表征复杂裂缝系统的发育程度,而且还能够表征复杂裂缝系统对致密低渗透储集层的储集性能和渗流能力的贡献. 相似文献
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在超声条件下,以卤代烃、金属镁粉、硼酸酯为原料合成了异丁基硼酸.反应的最佳条件为:以碘及二溴乙烷做催化剂,超声波功率为175 W,反应时间为15 min,反应温度为40℃. 相似文献
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借助S一系理论及序半群理论的方法,在序S-系范畴中引入了条件(PWPE),刻画了循环(Rees商)序S-系满足这一条件的序么半群的结构特征进一步地,给出了Rees商序S-系的条件(PWPE)与其他平坦性质一致的序么半群的刻画,并推广了条件(PWP)的相关结果 相似文献