The reaction of Co_2(CO)_8 with EtSPCl_2 gives a new crystal like compound Co_7(μ_7-S)(μ_4-PSEt)(μ- SEt)_2(μ-CO)_2(CO)_(12),whose structure has been determined by single crystal x-ray diffraction.This special com-...The reaction of Co_2(CO)_8 with EtSPCl_2 gives a new crystal like compound Co_7(μ_7-S)(μ_4-PSEt)(μ- SEt)_2(μ-CO)_2(CO)_(12),whose structure has been determined by single crystal x-ray diffraction.This special com- pound reveals some new features in cluster chemistry^1:The fragmentation of a ligand precursor EtSPCl_2 yields three kinds of fragments,μ_7-S,μ_4-PSEt and μ-SEt,which are ligands in the same cluster molecule.There is a new type of bridging S presented——A μ_7-S atom is interspaced into seven Co core.展开更多
研究目的:BIM(Building Information Modeling,建筑信息模型)技术对于提升工程建设管理水平具有重要作用。当前,高铁接触网BIM技术的应用研究仍然停留在起步阶段,且进展缓慢。利用基于IFC(Industry Foundation Classes,工业基础类)标准...研究目的:BIM(Building Information Modeling,建筑信息模型)技术对于提升工程建设管理水平具有重要作用。当前,高铁接触网BIM技术的应用研究仍然停留在起步阶段,且进展缓慢。利用基于IFC(Industry Foundation Classes,工业基础类)标准对高铁接触网BIM信息进行描述,是解决这一问题的有效途径。研究结论:(1)通过对比IFC标准各种扩展机制,提出采用代理类与自定义属性集相结合的扩展方式进行高铁接触网BIM基本信息描述;(2)开展了高铁接触网BIM信息分析,构建了高铁接触网身份信息、定位信息和技术信息IFC属性集;(3)提出了高铁接触网BIM建模方法;(4)经验证,本文提出的属性集与建模方法有效可行,有利于提升高铁接触网BIM模型的完备性,可为深化高铁接触网BIM技术的应用研究提供技术支撑。展开更多
基金National Natural Science Foundation of China(No.31100042)Guangdong Natural Science Foundation(No.S2011010001625)+1 种基金Guangzhou Pearl River Rising Star Program for Science and Technology(No.2013091)Guangdong Chinese Academy of Science Comprehensive Strategic Cooperation Project(No.2012B091100276)
文摘The reaction of Co_2(CO)_8 with EtSPCl_2 gives a new crystal like compound Co_7(μ_7-S)(μ_4-PSEt)(μ- SEt)_2(μ-CO)_2(CO)_(12),whose structure has been determined by single crystal x-ray diffraction.This special com- pound reveals some new features in cluster chemistry^1:The fragmentation of a ligand precursor EtSPCl_2 yields three kinds of fragments,μ_7-S,μ_4-PSEt and μ-SEt,which are ligands in the same cluster molecule.There is a new type of bridging S presented——A μ_7-S atom is interspaced into seven Co core.
文摘研究目的:BIM(Building Information Modeling,建筑信息模型)技术对于提升工程建设管理水平具有重要作用。当前,高铁接触网BIM技术的应用研究仍然停留在起步阶段,且进展缓慢。利用基于IFC(Industry Foundation Classes,工业基础类)标准对高铁接触网BIM信息进行描述,是解决这一问题的有效途径。研究结论:(1)通过对比IFC标准各种扩展机制,提出采用代理类与自定义属性集相结合的扩展方式进行高铁接触网BIM基本信息描述;(2)开展了高铁接触网BIM信息分析,构建了高铁接触网身份信息、定位信息和技术信息IFC属性集;(3)提出了高铁接触网BIM建模方法;(4)经验证,本文提出的属性集与建模方法有效可行,有利于提升高铁接触网BIM模型的完备性,可为深化高铁接触网BIM技术的应用研究提供技术支撑。
