Modeling and analyzing point cloud generation in missile-borne LiDAR

The missile-borne LiDAR has an essential prospect in precise guidance. However, the instability of the missile has a significant impact on the precision of LIDAR point cloud, thus modeling and analyzing the influencing factors of point cloud generation is necessary. In this investigation, the authors modeled the point cloud calculation process of missile-borne linear array scanning LiDAR under ideal conditions and analyzed the effect of position change on the field of view (FOV) in the course of platform motion. Subsequently, the authors summarized that the stability concerning the field of view and the target tracking are dependent on three limiting conditions. Finally, the authors derived an error formula and analyzed several typical errors in missile platform flight, including scanner error, POS error, system integration error, and platform vibration error. Based on theoretical analysis and simulation experiments, the model proposed in this paper can provide a theoretical basis for the design of the missile-borne LiDAR system and the selection of related instruments in practice.     

谈比例原则在规范消防行政执法裁量权中的适用

比例原则着眼于法益的均衡，要求行政主体在实现行政管理目标的同时，注意维护相对人的权益。作为行政法上控制自由裁量权的一项重要原则，在阐述了比例原则内涵与价值的基础上，针对消防行政执法自由裁量权行使的错位与失范，提出用比例原则进行规范与控制。     

飞行器的轨道优化与制导规律研究综述

飞行器的轨道优化与制导规律研究是飞行器设计的重要课题之一。轨道优化与制导规律研究是根据给定的技术指标 ,建立飞行器的运动方程 ,并选择主要设计参数 ,构造性能泛函 ,运用现代控制理论及数学理论原理求解最优参数 ,形成制导规律与相应的飞行器飞行轨道