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The induced matching partition number of graph G is the minimum integer k such that there exists a k-partition (V1,V2,…Vk) of V(G) such that,for each i(1≤i≤k),G[Vi]is 1-regular.In this paper,we study the induced matching partition number of product graphs. We provide a lower bound and an upper bound for the induced matching partition number of product graphs, and exact results are given for some special product graphs. 相似文献
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本文对背越式跳高教学中的心理诱导进行探讨,结果显示背越式跳高教学中恰当地穿插使用各种心理诱导手段,能节省教学时间,激发学生学习兴趣,克服对横杆的恐惧心理,培养学生练习的主动性、积极性。加快学生掌握背越式跳高技术的进程,提高教学效益。 相似文献
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The article presents a productivity analysis of Japanese wheat breeding research. We first estimate a hedonic function to determine the marginal implicit values of Japanese wheat characteristics and find that protein contributes substantially to millers’ price offers to farmers. Induced innovation theory implies breeders thus should be responding to new protein-oriented price policies by developing high-protein wheat varieties. We test this hypothesis by estimating a distance function relating breeding resources – including what we call gene-recharge rates – to the yield and protein characteristics of discovered varieties. New varieties indeed have been protein-favoring and yield-disfavoring, suggesting government research programs have been market-oriented. 相似文献
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针对茂名热电厂#6炉B引风机故障引起#6机停机事件,结合厂家人员的意见,对#6炉B引风机故障事件经过、原因、事件暴露问题等进行分析、阐述,找出整改措施,防止同类事件再次发生。 相似文献
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基于诱致性技术创新理论,从偏向性技术进步的视角分析玉米产业节本增效途径。研究发现：2004-2018年玉米产业的生产率为降低趋势,主要是因为其技术进步率的降低导致生产率的损失。技术进步对玉米产出增长的贡献率达到40%以上,机械投入对产出增长的贡献率超过30%。玉米产业表现出较强的机械要素替代劳动力要素,但生物化学要素对土地要素的替代效应并没有很显著。玉米产业的技术进步路径表现为从提高土地生产率的生物化学型向提高劳动生产率的机械型技术进步模式转变,这与我国玉米产业技术发展趋势和地理特征有关。研究价值：为玉米产业实现技术进步和节本增效提供参考依据,对促进我国区域玉米技术进步、保证我国粮食安全具有重要理论和现实意义。 相似文献
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影视旅游这种新兴的旅游模式对助推社会经济发展前景无量,发展江西影视旅游必将刺激江西社会经济的发展。本文针对江西影视旅游发展的情况,在韩国影视旅游发展经验已有的研究成果基础上,深入要素剖析,并将已有成果与发掘的经验相融合,探索有利于江西影视旅游发展的新路径。 相似文献
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马秀艳 《安阳师范学院学报》2007,(2):44-45
讨论了感生电动势与动生电动势的相对性与绝对性。指出场源与导体回路有相对运动时,感应电动势的种类与参考系有关,场源与导体回路无相对运动时,在任何参考系中观察,感应电动势都是感生电动势。 相似文献
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Jing ZHAO Wen-jie JIANG Chen SUN Cong-zhe HOU Xiao-mei YANG Jian-gang GAO 《Journal of Zhejiang University. Science. B》2013,14(12):1059-1069
Embryonic stem(ES)cells are widely used for different purposes,including gene targeting,cell therapy,tissue repair,organ regeneration,and so on.However,studies and applications of ES cells are hindered by ethical issues regarding cell sources.To circumvent ethical disputes,great efforts have been taken to generate ES cell-like cells,which are not derived from the inner cell mass of blastocyst-stage embryos.In 2006,Yamanaka et al.first reprogrammed mouse embryonic fibroblasts into ES cell-like cells called induced pluripotent stem(iPS)cells.About one year later,Yamanaka et al.and Thomson et al.independently reprogrammed human somatic cells into iPS cells.Since the first generation of iPS cells,they have now been derived from quite a few different kinds of cell types.In particular,the use of peripheral blood facilitates research on iPS cells because of safety,easy availability,and plenty of cell sources.Now iPS cells have been used for cell therapy,disease modeling,and drug discovery.In this review,we describe the generations,applications,potential issues,and future perspectives of iPS cells. 相似文献
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针对文〔3〕给出的K—拟可加模糊积分,利用文〔2〕的积分转换定理,研究这种积分的零可减,上(下)自连续以及逆上(下)自连续等遗传性。 相似文献