基于主成分分析的江西城市群培育潜力测度研究

城市群培育,是打破城市空间界限、重构区域优势、推动区域竞合发展的有效途径,正日趋成为一些发展中国家及地区实现跨越式发展的必然选择。江西城市群的培育起步较晚,存在空间结构不合理、集群辐射能力不足、城市功能及产业趋同、基本公共服务分割等问题。因此,借助主成分分析法,对江西7个城市(镇)群的培育潜力进行测算和排序,再运用聚类分析法,基于地区差异性划分出城市群培育的层次,以此为基础提出了"两群并发、三带联动、五群蓄势"的城市群培育空间格局和四条针对性的对策建议,对于培育壮大江西城市群具有重要的现实意义。

卷烟零售终端品牌培育潜力评估模型的构建与应用

品牌培育是卷烟营销的重点工作,如何筛选合适的零售终端进行特定品牌培育和投放,是烟草企业品牌培育工作的难点之一。在现有零售终端品牌培育评价模型基础上,文章提出了一种卷烟零售终端品牌培育潜力评估模型,选择了模型的相关计算指标和计算方法,并结合岳阳烟草的营销数据进行了模型测算和大数据分析系统的实际应用。运用结果表明,针对不同的卷烟品牌品规,该模型能够实现对零售终端品牌培育能力的评估和量化,基于零售终端品牌培育潜力评估结果,能够实现零售户的筛选优化,从而为品牌培育提供更加精准的引导。

国土空间规划背景下山西省城市协同发展调查分析

经济发展程度直接影响城市间协同发展能力,进而影响区域协同发展程度。文章运用经济联系强度调查分析方法对山西省地市间经济联系演变趋势特征及协同发展能力进行评价及演化分析。通过分析山西省城市协同发展的影响因子,科学、合理优化山西省城市空间布局,推进城市一体化发展,为国土空间规划背景下城市间资源调度和协同发展提供理论依据和实证分析。

Osteogenic potential of rabbit dermal fibroblasts cultured in vitro: a scanning electron microscopic study

Objective: To investigate further into the osteogenic potential of rabbit dermal fibroblasts with scanning electron microscope. Methods: Split thickness rabbit skin was processed into small chips that were cultured in vitro and then subjected to scanning electron microscopic study. Results: The fibroblasts swam out from the skin chips and they increased in number rapidly and became confluent. The cells exhibited squamous configuration, possessing arboreal bifurcation and forming multi layer structure. The fibroblasts then excreted numerous minute granules, heaping up on and around the cells. Thenceforth emerged on the cell surface fine needle like crystals, that agglomerated with the granules to form nodules. The fibroblasts orientated themselves in a radiating pattern around the large nodules. Neighboring nodules could be linked up into trabecular structures. Conclusions: Sequence of events of new bone formation by rabbit dermal fibroblasts cultured in vitro is fully depicted and confirmed.