Design and Implementation of Irrigated Area Information Management System Based on GIS and Flex

我国大多数灌区建于上世纪中叶，当时相关科技较为落后，灌区管理基本以人工管理为主，缺乏科学管理和调度。虽然部分灌区于本世纪初开始建设信息化系统，但是未统一规划，各系统数据互不共享，形成“信息孤岛”，最终导致灌区水利用系数低，水质污染严重，工程无法发挥最大效益。随着城市社会经济的飞速发展，灌区水资源管理的问题日显突出，除了继续解决主体工程存在的问题，采用信息化技术提高水资源利用率和管理水平显得尤为重要。 为适应水利信息化建设的要求，灌区信息管理系统围绕“信息存储数字化、信息应用网络化、专业管理软件化、政务管理电子化”等信息化发展阶段的基本特征，基于GIS和Flex平台开展建设，保障灌区汛期安全运...Most of irrigated areas in China were built in the mid of 20th century when the technology was not so advanced as today and they mostly relied on labour control without scientific management. Although starting from 21th century, information-based system was built in some irrigated areas, due to the lack of unified programming and information sharing, with regard to information, these irrigated are...学位：工学硕士院系专业：软件学院_软件工程学号：X201323210

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements