The Wadi-Fira region in eastern Chad is facing dramatic water supply problems, related to the climatic semi-arid context and the reception of refugees from the Darfour, which has increased the local population by 22% ...The Wadi-Fira region in eastern Chad is facing dramatic water supply problems, related to the climatic semi-arid context and the reception of refugees from the Darfour, which has increased the local population by 22% these last years. Expansion of agglomerations (temporary new towns), development of agricultural and pastoral practices together with the augmentation of the population have led to dramatic water needs. The basement aquifer of Wadi-Fira constitutes the main source of water supply. However, little is known about this system. Within this context, this work aims at better understanding and identifying hydrogeochemical processes and their relations to groundwater quality within this complex environment, and groundwater recharge mechanisms. 31 groundwater samples were collected at two sites, Am Zoer and Guereda-Iriba, from hand dug wells and deep wells. Major chemical elements were analyzed on all samples and stables isotopes (oxygen-18 and deuterium) on 17 samples. Various methods were used to interpret the hydrochemical data (descriptive and multivariate statistics, Piper and Schoeller diagrams, scatter plots, minerals saturation indices). The stable isotopes were interpreted using conventional IAEA methods. The results permitted to differentiate the laterite reservoir from the deep fractured reservoir. The main process controlling groundwater mineralization is water-rocks interaction and natural minerals dissolution. Ion exchanges, evaporation and anthropogenic activities have also a moderate impact on groundwater quality. Based on isotopes data, it is concluded that groundwater in the basement aquifer is related with modern rainfall. These results provide further insights into this basement aquifer, which is a vital resource for the region of Wadi-Fira.展开更多
作为巴塞罗那L＇ Hospitalet市都市再开发项目的一部分,费拉Porta Fira双子塔伫立于欧洲广场内。该基地位于巴塞罗那市和ElPrat国际机场之间,距离巴塞罗那ElPrat国际机场仅为8km,并构成了Barcelona Gran Via Fair会场的延伸部分,营造出...作为巴塞罗那L＇ Hospitalet市都市再开发项目的一部分,费拉Porta Fira双子塔伫立于欧洲广场内。该基地位于巴塞罗那市和ElPrat国际机场之间,距离巴塞罗那ElPrat国际机场仅为8km,并构成了Barcelona Gran Via Fair会场的延伸部分,营造出一个引导人们进入活动区域的门户。展开更多
他们终于来了。几十年来一直听说的机器人不仅在实验室甚至田间进行测试,现在终于在美国的果园和葡萄园中工作了。超过1,700名特种作物种植者、初创工程师、投资者和其他与该行业相关的人最近参加了在加利福尼亚州Salinas举行的FIRA USA...他们终于来了。几十年来一直听说的机器人不仅在实验室甚至田间进行测试,现在终于在美国的果园和葡萄园中工作了。超过1,700名特种作物种植者、初创工程师、投资者和其他与该行业相关的人最近参加了在加利福尼亚州Salinas举行的FIRA USA 2023,观看了最新的水果和蔬菜生产机器人的运行情况。展开更多
机器人足球赛通过一个标准的、易于评价的比赛平台,促进DAI(分布式人工智能)和MAS(多智能体系统)的研究与发展。在介绍机器人足球比赛的基础上,以FIRA(Federation of International Robot_soccer Association)仿真机器人足球比赛11VS11...机器人足球赛通过一个标准的、易于评价的比赛平台,促进DAI(分布式人工智能)和MAS(多智能体系统)的研究与发展。在介绍机器人足球比赛的基础上,以FIRA(Federation of International Robot_soccer Association)仿真机器人足球比赛11VS11为例,阐述仿真机器人足球软件平台的基本结构,对于了解机器人足球比赛以及编写Client端程序参加国际仿真足球比赛、构造动态多智能体系统和多智能体的合作具有重要意义,借此促进机器人足球仿真技术的推广。展开更多
针对FIRA Middle League MiroSot(5对5)机器人足球比赛,应用软件工程方法重新编写了比赛系统软件;提高了程序的可读性和持续改进能力,并且使得原来在3对3平台上不适应5对5环境的地方得到调整和优化;另外,还增加了基于录像的识别功能,方...针对FIRA Middle League MiroSot(5对5)机器人足球比赛,应用软件工程方法重新编写了比赛系统软件;提高了程序的可读性和持续改进能力,并且使得原来在3对3平台上不适应5对5环境的地方得到调整和优化;另外,还增加了基于录像的识别功能,方便在没有硬件支持的电脑上调试视觉识别部分的程序,增加了实时仿真动画功能,节约了实时视频显示的时间;该软件在比赛中运行效果良好。展开更多
文摘The Wadi-Fira region in eastern Chad is facing dramatic water supply problems, related to the climatic semi-arid context and the reception of refugees from the Darfour, which has increased the local population by 22% these last years. Expansion of agglomerations (temporary new towns), development of agricultural and pastoral practices together with the augmentation of the population have led to dramatic water needs. The basement aquifer of Wadi-Fira constitutes the main source of water supply. However, little is known about this system. Within this context, this work aims at better understanding and identifying hydrogeochemical processes and their relations to groundwater quality within this complex environment, and groundwater recharge mechanisms. 31 groundwater samples were collected at two sites, Am Zoer and Guereda-Iriba, from hand dug wells and deep wells. Major chemical elements were analyzed on all samples and stables isotopes (oxygen-18 and deuterium) on 17 samples. Various methods were used to interpret the hydrochemical data (descriptive and multivariate statistics, Piper and Schoeller diagrams, scatter plots, minerals saturation indices). The stable isotopes were interpreted using conventional IAEA methods. The results permitted to differentiate the laterite reservoir from the deep fractured reservoir. The main process controlling groundwater mineralization is water-rocks interaction and natural minerals dissolution. Ion exchanges, evaporation and anthropogenic activities have also a moderate impact on groundwater quality. Based on isotopes data, it is concluded that groundwater in the basement aquifer is related with modern rainfall. These results provide further insights into this basement aquifer, which is a vital resource for the region of Wadi-Fira.
文摘作为巴塞罗那L＇ Hospitalet市都市再开发项目的一部分,费拉Porta Fira双子塔伫立于欧洲广场内。该基地位于巴塞罗那市和ElPrat国际机场之间,距离巴塞罗那ElPrat国际机场仅为8km,并构成了Barcelona Gran Via Fair会场的延伸部分,营造出一个引导人们进入活动区域的门户。
文摘机器人足球赛通过一个标准的、易于评价的比赛平台,促进DAI(分布式人工智能)和MAS(多智能体系统)的研究与发展。在介绍机器人足球比赛的基础上,以FIRA(Federation of International Robot_soccer Association)仿真机器人足球比赛11VS11为例,阐述仿真机器人足球软件平台的基本结构,对于了解机器人足球比赛以及编写Client端程序参加国际仿真足球比赛、构造动态多智能体系统和多智能体的合作具有重要意义,借此促进机器人足球仿真技术的推广。
文摘针对FIRA Middle League MiroSot(5对5)机器人足球比赛,应用软件工程方法重新编写了比赛系统软件;提高了程序的可读性和持续改进能力,并且使得原来在3对3平台上不适应5对5环境的地方得到调整和优化;另外,还增加了基于录像的识别功能,方便在没有硬件支持的电脑上调试视觉识别部分的程序,增加了实时仿真动画功能,节约了实时视频显示的时间;该软件在比赛中运行效果良好。
