对路面的重建（Lidar）
多种表面重建方法，包括Alpha形状、屏幕化泊松重建（SPR）、Crust算法和代数点集表面（APSS Marching Cubes） In addition, well-known surface reconstruction methods, i.e., Alpha shapes, Screened Poisson reconstruction (SPR), the Crust, and Algebraic point set surfaces (APSS Marching Cubes), were utilized for object reconstruction
尤其是LiDAR点云通常存在噪声和稀疏性问题，这些可以被视为数据缺陷，通过引入特定的先验知识（例如城市环境中的几何形状）和新的重建技术，可以进一步改善重建质量。
3D SHAPE TECHNIQUES FOR 3D MODEL RECONSTRUCTION
3D SHAPE TECHNIQUES FOR 3D MODEL RECONSTRUCTION
Quizzes 1 一对多，哪个是FK？ The personid in CAR is the foreign key . 如果这个attribute只在一个表里出现，就不需要item.color了 GROUP BY select max(sum(saleqty)) from qsale group by itemname (wrong) Nesting functions for ‘group by’ data is not allowed select count(* ) from qdel group by count(* ) order by splno desc;(wrong) ‘Group by count(* )’ gives a syntax error, because the group by clause needs to target un-grouped attributes (and group them). If the argument of group by was changed to ‘splno’, the query would be correct. ‘FROM’ should be followed by the name of a table or query, not of a column After ‘or’ there should be an expression, e.g. ‘or itemcolor = ‘white’. Instead, there is only a text string.
The Managerial Perspective 1 components of organizational memory and then discussing some of its common problems. 2 the relationship between information and organizational goals
§ Describe the Role of Databases in Software Systems § Explain the features of managing data § Illustrate how SQL can be secured § Use of SQL FUNCTIONS
The relational model is a meta-model described as E-R model domain, intergrity and operators to retrieve, derive, modify data
Chapter 7 how to model and design a database Data Modelling = the art of database design Find out which facts : things (entiy). keep what (attribute), model what might happen, how the facts link (relationship) Not process, data flow, experimental design Make a database metadata identify the facts to be stored in the database client and analysit Building Blocks entity attribute relationship identifiers (+ and frim’boss 是什么？) Q Aim 1 a well formed data model Construction rules obeyed No ambiguity Aim 2 a high fidelity image faithfully describes the world relationships data model is complete, understandable and accurate make sense 7 habits of highly effective data modellers