BIM(Building Information Modeling)即建筑信息模型[1]。业界对于BIM在管理、技术和应用方面的探索方兴未艾,BIM的本质是实现建筑行业各个专业之间的信息充分互用,提高建筑信息的复用率,从而达到降低建筑成本,提高生产效率的目的。我...BIM(Building Information Modeling)即建筑信息模型[1]。业界对于BIM在管理、技术和应用方面的探索方兴未艾,BIM的本质是实现建筑行业各个专业之间的信息充分互用,提高建筑信息的复用率,从而达到降低建筑成本,提高生产效率的目的。我们结合实际工程,对BIM的概念及实施做了初步的研究和实践,并从设计院的工作内容和角度,对三维协同设计的工作流程进行了初步探索,对在三维设计模式下,各专业间及专业内的协同工作方法作了总结。展开更多
Einstein described the mass-energy equivalence as the most important result of special relativity. But more than a century after Einstein first derived the relationship between mass-energy equivalence (or mass-energy ...Einstein described the mass-energy equivalence as the most important result of special relativity. But more than a century after Einstein first derived the relationship between mass-energy equivalence (or mass-energy equation), questions left for people are how to understand that mass and energy are somehow equivalent, and how to give the dynamical process for the conversion from mass to energy (or vice versa). This paper first interprets the formula of mass-energy equivalence published by Einstein in 1905, and then gives the equivalence relationship of mass-energy transition based on the dynamics of particle orthogonal collision. As a result, the orthogonal collision of two high-energy mass particles can generate a huge mass-energy density, equivalent to the total energy of N new particles, which is a one-way dynamic process that generates new mass-energy density and new matter. This conversion of mass into energy has nothing to do with special relativity.展开更多
文摘BIM(Building Information Modeling)即建筑信息模型[1]。业界对于BIM在管理、技术和应用方面的探索方兴未艾,BIM的本质是实现建筑行业各个专业之间的信息充分互用,提高建筑信息的复用率,从而达到降低建筑成本,提高生产效率的目的。我们结合实际工程,对BIM的概念及实施做了初步的研究和实践,并从设计院的工作内容和角度,对三维协同设计的工作流程进行了初步探索,对在三维设计模式下,各专业间及专业内的协同工作方法作了总结。
文摘Einstein described the mass-energy equivalence as the most important result of special relativity. But more than a century after Einstein first derived the relationship between mass-energy equivalence (or mass-energy equation), questions left for people are how to understand that mass and energy are somehow equivalent, and how to give the dynamical process for the conversion from mass to energy (or vice versa). This paper first interprets the formula of mass-energy equivalence published by Einstein in 1905, and then gives the equivalence relationship of mass-energy transition based on the dynamics of particle orthogonal collision. As a result, the orthogonal collision of two high-energy mass particles can generate a huge mass-energy density, equivalent to the total energy of N new particles, which is a one-way dynamic process that generates new mass-energy density and new matter. This conversion of mass into energy has nothing to do with special relativity.