Survey on autonomous task scheduling technology for Earth observation satellites

How to make use of limited onboard resources for complex and heavy space tasks has attracted much attention.With the continuous improvement on satellite payload capacity and the increasing complexity of observation requirements,the importance of satellite autonomous task scheduling research has gradually increased.This article first gives the problem description and mathematical model for the satellite autonomous task scheduling and then follows the steps of"satellite autonomous task scheduling,centralized autonomous collaborative task scheduling architecture,distributed autonomous collaborative task scheduling architecture,solution algorithm".Finally,facing the complex and changeable environment situation,this article proposes the future direction of satellite autonomous task scheduling.

大型城市富营养化湖泊沉水植物修复工程实践——以武汉东湖为例

沉水植物是湖泊生态系统的主要组成部分,修复沉水植物群落是恢复湖泊生态系统重要环节。以武汉市东湖水生态修复工程为例,结合东湖环境现状,确定了沉水植物修复区、各子湖修复物种以及沉水植物配置方案:沉水植物种植技术采取原位生态修复技术,依照“选定区域—清除杂物,生态驱鱼—种植”的工序施工。工程实施后,沉水植物长势较好,水生植物覆盖度可达70%以上,透明度可达120 cm以上,基本达到设计要求。