SBS改性沥青因可显著提高沥青路面的使用性能从而得以大范围推广应用。工厂化改性方式使得SBS改性沥青生产与使用环节分离,改性沥青SBS含量及质量监控成为难点。基于傅里叶变换红外光谱(FTIR)衰减全反射法提出一种SBS含量快速检测方法,...SBS改性沥青因可显著提高沥青路面的使用性能从而得以大范围推广应用。工厂化改性方式使得SBS改性沥青生产与使用环节分离,改性沥青SBS含量及质量监控成为难点。基于傅里叶变换红外光谱(FTIR)衰减全反射法提出一种SBS含量快速检测方法,该方法采用点滴法成型沥青试样,应用衰减全反射ATR附件采集试样的红外光谱,以(CSBS,A966/A1377)集合经线性拟合得到标准曲线计算未知样的SBS含量。与规范JTG E20-2019 T 0673方法相比,该方法具有制样简单、测试时间短和结果精准等特点,可用于施工项目现场的SBS含量快速检测。展开更多
This paper deals with the computer modeling of structures starting from a point cloud. The CCTV （China Central Television） tower headquarters is the case for study because the shape of this building is non-stellar, ...This paper deals with the computer modeling of structures starting from a point cloud. The CCTV （China Central Television） tower headquarters is the case for study because the shape of this building is non-stellar, concave and multi-connected. It is composed of sowns and chains. The sown is the representation of a horizontal plane formed by dense points. The chain is a planar path modeled by rare points. The CCTV structure is defined only by the three orthogonal Cartesian coordinates of the points. The proposed computer modeling uses a sequence of procedures and the desired outputted 3D model is consistent. The first procedure is devoted to attributing points to their voxel and to estimating three values needed afterwards. The second procedure is devoted to analyzing clusters vertically and horizontally, to preliminarily distinguishing chains from sowns and to generating relational matching. The third procedure is devoted to building closed paths between all chains and all their projections on sowns. The fourth procedure is devoted to connecting points with triangles. The fifth procedure, still being implemented, is devoted to interpolating triangles with triangular splines. The results show it is possible to achieve the 3D model using the above mentioned procedures. These procedures are written, implemented and tested and they form a library of people＇s own software. The code is written using Matlab. It is not possible to obtain the required 3D model if the procedures are applied in the wrong order or one step is skipped. To conclude, it is possible to obtain the computer model of the CCTV using the provided sequence of procedures.展开更多
文摘SBS改性沥青因可显著提高沥青路面的使用性能从而得以大范围推广应用。工厂化改性方式使得SBS改性沥青生产与使用环节分离,改性沥青SBS含量及质量监控成为难点。基于傅里叶变换红外光谱(FTIR)衰减全反射法提出一种SBS含量快速检测方法,该方法采用点滴法成型沥青试样,应用衰减全反射ATR附件采集试样的红外光谱,以(CSBS,A966/A1377)集合经线性拟合得到标准曲线计算未知样的SBS含量。与规范JTG E20-2019 T 0673方法相比,该方法具有制样简单、测试时间短和结果精准等特点,可用于施工项目现场的SBS含量快速检测。
文摘This paper deals with the computer modeling of structures starting from a point cloud. The CCTV （China Central Television） tower headquarters is the case for study because the shape of this building is non-stellar, concave and multi-connected. It is composed of sowns and chains. The sown is the representation of a horizontal plane formed by dense points. The chain is a planar path modeled by rare points. The CCTV structure is defined only by the three orthogonal Cartesian coordinates of the points. The proposed computer modeling uses a sequence of procedures and the desired outputted 3D model is consistent. The first procedure is devoted to attributing points to their voxel and to estimating three values needed afterwards. The second procedure is devoted to analyzing clusters vertically and horizontally, to preliminarily distinguishing chains from sowns and to generating relational matching. The third procedure is devoted to building closed paths between all chains and all their projections on sowns. The fourth procedure is devoted to connecting points with triangles. The fifth procedure, still being implemented, is devoted to interpolating triangles with triangular splines. The results show it is possible to achieve the 3D model using the above mentioned procedures. These procedures are written, implemented and tested and they form a library of people＇s own software. The code is written using Matlab. It is not possible to obtain the required 3D model if the procedures are applied in the wrong order or one step is skipped. To conclude, it is possible to obtain the computer model of the CCTV using the provided sequence of procedures.
