临沂市贯彻实施《土地管理法》情况的调查与思考

近年来,临沂市的节约集约用地工作被省政府、国土资源部和中宣部列为全省和全国典型;新华社“国内动态清样”对该市土地开发整理工作进行了典型报道,省委、省政府的主要领导对此均作了重要批示,充分肯定了临沂市在土地开发整理方面的经验和做法;土地储备机构获“2005年度中国城市土地市场示范单位20佳”。     

血流储备分数CT成像对冠状动脉旁路移植术后的影像学评价

目的：通过分析冠状动脉旁路移植术后患者的影像学表现,评估移植血管与原位冠状动脉的血流储备分数有无关联、有何关联。方法：对29例行CCTA的冠状动脉旁路移植术后患者进行回顾性或前瞻性分析,评估移植血管和原位冠状动脉狭窄程度,并在此基础上测量其FFR_CT值。对移植血管及相应原位冠状动脉狭窄程度及FFR_CT值做相关性检验。按照移植血管狭窄程度是否> 50%分为A、B两组,对相应移植血管及原位冠状动脉管腔狭窄程度、FFR_CT值分别作两组间独立样本t检验。结果：移植血管与相应原位冠状动脉狭窄程度呈负相关,而与原位冠状动脉FFR_CT值呈正相关。A、B两组相比,其相应原位冠状动脉斑块形成处狭窄程度及FFR_CT值,两组间t检验结果有显著统计学差异。结论：移植血管与原位冠状动脉狭窄程度、FFR_CT值及其演变存在关联,当移植血管狭窄时,原位冠状动脉分流了移植血管的部分血流,进而起到代偿作用。     

New evidences on the climatic causes of the formation of the spring persistent rains over southeastern China

The spring persistent rains (SPR) over southeastern China (SEC) are a unique synoptic and climatic phenomenon in East Asia. A former study has found that the southwesterly flow which lies on the southeastern flank of the Tibetan Plateau (TP) is one of the deflected westerly flows of the TP, and it is suggested to be the direct climatic cause of SPR. This study found that the southwesterly flow is also highly correlated with the sensible heating of the southeastern TP in interannual variability, in addition to having a high correlation in seasonal variability. These facts suggest that the thermal forcing of the TP is another important climatic cause of SPR. Numerical sensitivity experiments further prove that the mechanical and thermal forcings of the TP are the climatic causes of the formation of the SPR. On the other hand, the Nanling Mountains and Wuyi Mountains (NWM) over southeastern China not only increase the SPR precipitation amount evidently, but also make the SPR rain belt move to the south by blocking the strong southwesterly flow.