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Finite element analysis on permeability of cut-off wall for landfill 垃圾填埋场防渗墙渗透性的有限元分析
G. Dai, Xu Jiajing, Shujin Li, Li Xiongwei, G. Shi, Shi Weicheng
Finite element method is an efficient numerical calculation method based on information technology, which can be used to solve complex equations in various problems. At present, the finite element method is mainly used to deal with seepage problems in dams, while there is less study on seepage in landfill. In this paper, finite element method is used to analyze the seepage of cut-off wall of a landfill in Jiangsu Province, and the movement of landfill leachate in cut-off wall under different conditions is simulated. The simulation results show that The cut-off wall can effectively slow down the seepage velocity of leachate; Under different conditions, the maximum gradient of the cut-off wall are 18.68 and 13.84 respectively, which conforms to Chinese national standard. Therefore, the design of cut-off wall is safe and reasonable, and filtration erosion will not occur; This simulation method combined with information technology can provide new solutions and ideas for other projects to verify safety and rationality.
有限元法是一种基于信息技术的高效数值计算方法,可用于求解各种问题中的复杂方程。目前,有限元法主要用于处理坝体渗流问题,而对填埋场渗流问题的研究较少。本文采用有限元法对江苏省某垃圾填埋场防渗墙渗流进行了分析,模拟了不同条件下垃圾渗滤液在防渗墙中的运动。仿真结果表明:截流墙能有效减缓渗滤液的渗流速度;不同工况下,防渗墙最大坡度分别为18.68和13.84,均符合国家标准。因此,防渗墙设计安全合理,不会发生过滤冲刷;这种仿真方法与信息技术相结合,可以为其他项目验证安全性和合理性提供新的解决方案和思路。
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引用次数: 2
Role of Machine Learning Algorithms in Forest Fire Management: A Literature Review 机器学习算法在森林火灾管理中的作用:文献综述
A. Muhammad, Alghamdi Khloud K, Sahel Salma A, Alosaimi Samar O, Alsahaft Mashael E, Alharthi Maram A, Arif Maryam
Forest fire disasters are recently getting lots of attention due to climate change globally. Globally, climate changes are rapidly changing the fire patterns on Earth. Effective fire management requires accurate information about the fire occurrence, its spread, and impact on the environment. Prediction of fire activities in the forest guides the authorities to make optimal, efficient, and sound decisions in fire management. This paper aims to summarize recent trends in the forest fire events prediction, detection, spread rate, and mapping of the burned areas. Furthermore, fire emissions in terms of smoke also put the Earth's public health and ecological system at greater risk.
由于全球气候变化,森林火灾最近受到了很多关注。在全球范围内,气候变化正在迅速改变地球上的火灾模式。有效的火灾管理需要有关火灾发生、蔓延和对环境影响的准确信息。对森林火灾活动的预测指导当局在火灾管理中做出最佳、有效和合理的决策。摘要综述了近年来森林火灾事件预测、探测、蔓延速度和火区制图的发展趋势。此外,火灾排放的烟雾也使地球的公共健康和生态系统面临更大的风险。
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引用次数: 16
Camera Relocalization using Deep Point Cloud Generation and Hand-crafted Feature Refinement 相机重新定位使用深度点云生成和手工制作的特征细化
Junyi Wang, Yue Qi
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引用次数: 0
Constrained Path Planning and Guidance in General Wind Fields 一般风场约束路径规划与导引
E. Paiva, M. Perazzo, R. Cordeiro
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引用次数: 0
µ-Planner: A Robot Path Planning Approach Based on Language Measure of Unsupervised Automata µ-Planner:一种基于无监督自动机语言测度的机器人路径规划方法
E. Carvalho, E. Freire, L. Molina, J. M. Filho
Abstract: This paper proposes a robot path planner based on language measure, μ-planner. Workspace is discretized in a occupancy grid map and we model the system by considering how events, associated to robot’s motions, take it to different cells (discrete positions). The calculated language measure values corresponds to a gradient, which the robot can use reach its destination by choosing events that take it to states with higher measure values. Concepts of Lapace’s equation and harmonic functions are used to prove that our method guarantees both the existence and monotonicity of language measure. The proposed method is simple and computationally inexpensive and guarantees existence of path from any co-accessible state to the destination. Experiments considering different scenarios have been performed to validate and compare μ-planner with similar methods.
摘要:本文提出了一种基于语言测度的机器人路径规划器μ-planner。工作空间在占用网格图中离散化,我们通过考虑与机器人运动相关的事件如何将其带到不同的单元(离散位置)来对系统进行建模。计算出的语言测量值对应于一个梯度,机器人可以通过选择将其带到具有更高测量值的状态的事件来使用该梯度到达目的地。利用Lapace方程和调和函数的概念证明了我们的方法保证了语言测度的存在性和单调性。所提出的方法简单且计算成本低廉,并保证了从任何可访问状态到目的地的路径的存在。已经进行了考虑不同场景的实验,以验证和比较μ-planner与类似方法。
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引用次数: 0
Offline drone instrumentalized ambulance for emergency situations 离线无人机仪器化急救车
Hitesh Mohapatra
In this paper, an offline drone instrumentalized ambulance (ODIA) mechanism has been discussed. The rapid increase in the urban population directly influences every sector of society. The sectors are maybe food, health care, education, transportation, etc. Normally, it has been observed that when any accidents happen on the urban road or any remote places then, the availability of immediate medical help is very rare. It is not because of the unaware or unavailability of medical facilities rather it happens because of overcrowding on the urban road and geographical odd-isolation of places. Hence, here an ODIA concept has been discussed which uses offline maps and offline first-aid medical videos through which immediate medical help can be made available at the patient end. This model helps to save the life of an accident victim by providing immediate medical attention. The key strength of ODIA is, it is independent of internet service that is why it is more suitable for harsh and hostile environments.
本文讨论了一种离线无人机仪器化救护车(ODIA)机制。城市人口的迅速增长直接影响到社会的各个部门。这些部门可能是食品、医疗保健、教育、交通等。通常,人们观察到,当任何事故发生在城市道路或任何偏远地区时,立即获得医疗救助的情况非常罕见。这并不是因为人们不知道或没有医疗设施,而是因为城市道路上的过度拥挤和地理上奇怪的隔离。因此,这里讨论了一个ODIA概念,它使用离线地图和离线急救医疗视频,通过这些视频可以在患者端提供即时医疗帮助。这种模式有助于通过提供即时医疗护理来挽救事故受害者的生命。ODIA的关键优势在于,它独立于互联网服务,这就是为什么它更适合恶劣和敌对的环境。
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引用次数: 12
Development of a real-time framework for farm monitoring using drone technology 利用无人机技术开发农场实时监控框架
A. Oyelami, Adedayo Akinade, Kingsley Obianefo
This work developed a cost-effective framework for agriculturists to regularly monitor their crops against intruding rodents and other security concerns using modern drone technology through configuration and deployment of an autonomous UAV which also functions as a remotely piloted vehicle. This was done by configuring a quadcopter capable of causing a disturbance when a rodent is observed through an inbuilt alarm system whose sound is amplified to be loud enough to cause the animals to leave the farm area. A framework for real-time image and live video transmission from the farm to a designated remote base station was developed. This was achieved through programming codes that configured the drone to operate an intelligent alarm and object tracking systems which enables a live feed from the UAV using Arduino IDE and Mission Planner for autonomous flight control. The requisite algorithms were developed using the framework of tracking, learning and detection (TLD) in the OpenCV software. The drone movement is equally controlled remotely over a Wi-Fi network using an ESP8266 Wi-Fi module for redirection and controlling of the drone movement to monitor specific locations.
这项工作为农民开发了一个具有成本效益的框架,通过配置和部署自动无人机(也可作为远程驾驶车辆),利用现代无人机技术定期监测他们的作物,防止啮齿动物入侵和其他安全问题。这是通过配置一架四轴飞行器来完成的,当通过内置的警报系统观察到啮齿动物时,该警报系统的声音被放大到足以使动物离开农场区域。制定了从农场向指定的远程基站传输实时图像和实况视频的框架。这是通过编程代码实现的,该代码配置无人机运行智能报警和对象跟踪系统,该系统使用Arduino IDE和任务规划器实现无人机的实时馈送,以进行自主飞行控制。利用OpenCV软件中的跟踪、学习和检测(TLD)框架开发了所需的算法。无人机运动同样通过Wi-Fi网络远程控制,使用ESP8266 Wi-Fi模块进行重定向和控制无人机运动,以监视特定位置。
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引用次数: 0
A simulated risk assessment of human-robot interaction in the domestic environment 家用环境中人机交互的模拟风险评估
T. E. Kaonain, Mohd Azizi Abdul Rahman, M. Ariff, K. Mondal
In human-robot interaction, the use of collaborative robots or cobots in many industries is of major importance to researchers in human-robot interaction (HRI). The interaction between human robot carries several challenges, the greatest being the risk of human injury. In addition to reducing the proximity between robots and humans, increased difficulty of human-robot encounters raises the likelihood of accidents only. This paper proposes a virtual collaborative robot in the simulated non-industrial workspace. The safety during human-robot interaction using simulation software was investigated by measuring the risks for planning and control. A reactive robot controller was formulated to minimize the risk during human-robot interaction. A Gazebo software is used in this article, written in Python language, to replicate complex environments that a robot can face. This paper also investigated the robot’s speed. It can be reduced before a collision with a human about to happen, and it minimized the risk of the collision or reduced the damage of the risk. After the successful simulation, this can be applied to the real robot in a practical domestic environment.
在人机交互中,协作机器人或cobot在许多行业的使用对人机交互(HRI)的研究人员具有重要意义。人类与机器人之间的互动带来了几个挑战,最大的挑战是人类受伤的风险。除了减少机器人和人类之间的距离外,人类与机器人相遇的难度增加只会增加事故的可能性。本文提出了一种在模拟非工业工作空间中的虚拟协作机器人。通过测量计划和控制的风险,使用仿真软件研究了人机交互过程中的安全性。提出了一种反应式机器人控制器,以最大限度地降低人机交互过程中的风险。本文使用了一个用Python语言编写的Gazebo软件来复制机器人可能面临的复杂环境。本文还研究了机器人的速度。它可以在与人类发生碰撞之前减少,并将碰撞风险降至最低或降低风险的损害。仿真成功后,可以在实际的国内环境中应用于真实的机器人。
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引用次数: 1
Tracking for inspection in energy transmission power lines using unmanned aerial vehicles: a systematic review of current and specific literature 使用无人机对输电线路进行跟踪检查:对当前和特定文献的系统综述
W. M. Martins, Antonio J. Dantas Filho, Leandro D. de Jesus, A. D. Souza, A. B. Ramos, T. Pimenta
Power transmission lines are of great importance for the operation of all sectors of society, such as commerce, industry and public agencies. To ensure reliability and availability of power supply, regular and occasional inspections are conducted, mostly using patrol with binoculars, helicopters or truck cranes. Research is being developed using unmanned aerial vehicle (UAV) to make this activity autonomous, faster, safer, and less costly. The present work aims to analyze research related to the autonomous control of the UAV along the transmission lines through a systematic review of the literature (SRL), apply a viable solution and to verify the possible lacuna in this state of the art. Improvements in safety, computational process and energy efficiency with low-cost were identified. The results presented can help the research community to perform the working this state of art, from the suggestions of autonomous tracking of transmission lines.
输电线路对商业、工业和公共机构等社会各界的运营至关重要。为了确保供电的可靠性和可用性,定期和不定期进行检查,主要使用双筒望远镜、直升机或卡车起重机进行巡逻。正在开发使用无人机的研究,以使这项活动自主、更快、更安全、成本更低。本工作旨在通过对文献(SRL)的系统回顾,分析与无人机沿输电线路自主控制相关的研究,应用可行的解决方案,并验证这一技术状态中可能存在的缺陷。确定了低成本的安全性、计算过程和能源效率方面的改进。根据输电线路自主跟踪的建议,所提出的结果可以帮助研究界开展这一最新的工作。
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引用次数: 4
The quadrotor dynamic modeling and study of meta-heuristic algorithms performance on optimization of PID controller index to control angles and tracking the route 四旋翼动力学建模及元启发式算法研究PID控制器指标优化控制角度和路径跟踪性能
A. Moshayedi, Mahyar Gheibollahi, Liefa Liao
In the last decade, because of the unique specification of vertical fliers, scientists and researchers had a special focus on them. The particular abilities of these fliers can be mentioned such as: high maneuver ability, low expenses, decrease in radar identifier and low threat for the human life. They also have no limitation in dimension. Moreover, because of some applications like photography, topography, news coverage, study of power lines and aerology analysis, they can be notable for using. These fliers also are significantly important because of monitoring in urban regions, agricultural harvest and spray poison, illegal imports, exports administration and fire distinction in order to control the fire. Besides, seek and rescue missing people and also natural disasters can be pre-determined which causes stimulus investigators to act and put different topics in front of them. One of these fields is using meta-heuristic algorithms with the capability of using in control systems. The PID controller as a classic model has some limitations, but by optimization of special index through meta-heuristic algorithms, it has shown acceptable results. In this study, first, the history of vertical fliers and quadrotor are investigated. Then, after a review of overused methods, the quadrotor control has been done. Afterward, the cinematic and dynamic of quadrotor is presented. Next by designing of PID controller, PID index optimization by nature inspired algorithm, particle swarm optimization (PSO), genetic algorithms (GA), and firefly algorithms (FA) have been studied. Dynamic system, controller and mentioned optimization methods of PID controller index have also been implemented in MATLAB software. Also, with due attention to the comparison criteria the PID-PSO controller has shown the best performance. Next, by applying challenging routes, the stability of controller in the simulation is evaluated. Then, making quadrotor is done in practice along with introducing the used implementation of PID-PSO controller results on the real robot, and its stability is evaluated practically.
在过去的十年里,由于垂直飞行器的独特规格,科学家和研究人员对它们有着特殊的关注。这些飞行员的特殊能力包括:高机动能力、低费用、减少雷达识别器和降低对人类生命的威胁。它们在尺寸上也没有限制。此外,由于一些应用,如摄影、地形、新闻报道、电力线研究和气象学分析,它们的使用值得注意。这些传单也非常重要,因为在城市地区进行监测、农业收割和喷洒毒药、非法进口、出口管理和火灾区分,以控制火灾。此外,寻找和营救失踪人员以及自然灾害都是预先确定的,这导致刺激调查人员采取行动,并将不同的主题摆在他们面前。其中一个领域是使用具有在控制系统中使用的能力的元启发式算法。PID控制器作为一个经典的模型有一些局限性,但通过元启发式算法对特殊指标进行优化,已经显示出可以接受的结果。在这项研究中,首先,研究了垂直飞行和四旋翼的历史。然后,在回顾了过度使用的方法后,进行了四旋翼控制。然后,介绍了四旋翼的电影化和动态性。其次,通过PID控制器的设计,研究了自然启发算法、粒子群算法、遗传算法和萤火虫算法对PID指标的优化。在MATLAB软件中实现了动态系统、控制器以及上述PID控制器指标的优化方法。此外,在适当注意比较标准的情况下,PID-PSO控制器显示出最佳性能。接下来,通过应用具有挑战性的路线,评估了控制器在仿真中的稳定性。然后,在实践中制作了四旋翼,并介绍了PID-PSO控制器在实际机器人上的应用结果,并对其稳定性进行了实际评估。
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引用次数: 14
期刊
IEEE International Conference on Robotics and Automation : ICRA : [proceedings]. IEEE International Conference on Robotics and Automation
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