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 Drones


AI Algorithm for Predicting and Optimizing Trajectory of UAV Swarm

arXiv.org Artificial Intelligence

This paper explores the application of Artificial Intelligence (AI) techniques for generating the trajectories of fleets of Unmanned Aerial Vehicles (UAVs). The two main challenges addressed include accurately predicting the paths of UAVs and efficiently avoiding collisions between them. Firstly, the paper systematically applies a diverse set of activation functions to a Feedforward Neural Network (FFNN) with a single hidden layer, which enhances the accuracy of the predicted path compared to previous work. Secondly, we introduce a novel activation function, AdaptoSwelliGauss, which is a sophisticated fusion of Swish and Elliott activations, seamlessly integrated with a scaled and shifted Gaussian component. Swish facilitates smooth transitions, Elliott captures abrupt trajectory changes, and the scaled and shifted Gaussian enhances robustness against noise. This dynamic combination is specifically designed to excel in capturing the complexities of UAV trajectory prediction. This new activation function gives substantially better accuracy than all existing activation functions. Thirdly, we propose a novel Integrated Collision Detection, Avoidance, and Batching (ICDAB) strategy that merges two complementary UAV collision avoidance techniques: changing UAV trajectories and altering their starting times, also referred to as batching. This integration helps overcome the disadvantages of both - reduction in the number of trajectory manipulations, which avoids overly convoluted paths in the first technique, and smaller batch sizes, which reduce overall takeoff time in the second.


Are seed-sowing drones the answer to global deforestation?

Al Jazeera

Santa Cruz Cabralia, Bahia, Brazil – With a loud whir, the drone takes flight. Minutes later, the humming sound gives way to a distinctive rattling as the machine, hovering about 20 metres above the ground, begins unloading its precious cargo and a cocktail of seeds rains down onto the land below. Given time, these seeds will grow into trees and, eventually, it is hoped, a thriving forest will stand where there was once just sparse vegetation. That is what the startup which operates this drone, a large contraption that looks a bit like a Pokemon ball with antennae, hopes. The 54 hectares (133 acres) here which have been badly degraded by agriculture and cattle farming in the Brazilian state of Bahia are just the start.


Russia-Ukraine war: List of key events, day 814

Al Jazeera

A Ukrainian drone attack killed one person and injured another in southern Russia's Belgorod region, according to the regional governor, Vyacheslav Gladkov. He said the drone hit the village of Novaya Naumovka, where the two residents were tending a garden.


Cooperative Cognitive Dynamic System in UAV Swarms: Reconfigurable Mechanism and Framework

arXiv.org Artificial Intelligence

As the demands for immediate and effective responses increase in both civilian and military domains, the unmanned aerial vehicle (UAV) swarms emerge as effective solutions, in which multiple cooperative UAVs can work together to achieve specific goals. However, how to manage such complex systems to ensure real-time adaptability lack sufficient researches. Hence, in this paper, we propose the cooperative cognitive dynamic system (CCDS), to optimize the management for UAV swarms. CCDS leverages a hierarchical and cooperative control structure that enables real-time data processing and decision. Accordingly, CCDS optimizes the UAV swarm management via dynamic reconfigurability and adaptive intelligent optimization. In addition, CCDS can be integrated with the biomimetic mechanism to efficiently allocate tasks for UAV swarms. Further, the distributed coordination of CCDS ensures reliable and resilient control, thus enhancing the adaptability and robustness. Finally, the potential challenges and future directions are analyzed, to provide insights into managing UAV swarms in dynamic heterogeneous networking.


An exact coverage path planning algorithm for UAV-based search and rescue operations

arXiv.org Artificial Intelligence

Unmanned aerial vehicles (UAVs) are increasingly utilized in global search and rescue efforts, enhancing operational efficiency. In these missions, a coordinated swarm of UAVs is deployed to efficiently cover expansive areas by capturing and analyzing aerial imagery and footage. Rapid coverage is paramount in these scenarios, as swift discovery can mean the difference between life and death for those in peril. This paper focuses on optimizing flight path planning for multiple UAVs in windy conditions to efficiently cover rectangular search areas in minimal time. We address this challenge by dividing the search area into a grid network and formulating it as a mixed-integer program (MIP). Our research introduces a precise lower bound for the objective function and an exact algorithm capable of finding either the optimal solution or a near-optimal solution with a constant absolute gap to optimality. Notably, as the problem complexity increases, our solution exhibits a diminishing relative optimality gap while maintaining negligible computational costs compared to the MIP approach.


Ukraine launches biggest drone attack on Russia as Putin courts support from China

FOX News

Ukraine launched its largest-ever kamikaze drone attack on Russia while Russian President Vladimir Putin visited China, killing two people and causing an oil refinery fire in the Black Sea, according to officials. "Fifty-one UAVs were destroyed and intercepted over Crimea, 44 over the Krasnodar region, six over the Belgorod region and one over Kursk region," Russia's military said in a press release according to Voice of America. The wave of drones attacked several targets around the Belgorod region and along the coast of the Black Sea. Belgorod Governor Vyacheslav Gladkov said a mother and child were killed while traveling in a car, and authorities managed to extinguish the fire at the Tuapse refinery. "The child was in critical condition. Doctors did everything possible to save him," Gladkov said.


Russian strikes kill two in Ukraine's Kharkiv as Moscow steps up attacks

Al Jazeera

Russian guided bombs have killed at least two people and injured 13 in Ukraine's northeastern city of Kharkiv, local officials say, as Russia continues its major military offensive in the region. It was not immediately clear what the bombs had been targeting on Friday, but the regional governor said those injured were civilians. "Among the 13 wounded, four are in a serious condition," Governor Oleh Syniehubov said on the Telegram messaging app. Kharkiv, Ukraine's second largest city, and the surrounding region have long been targeted by Russian attacks but the strikes have become more intense in recent months, hitting civilian and energy infrastructure. Reporting from Kharkiv on Friday, Al Jazeera's John Holman said several strikes were heard and a "thick, black plume of smoke" was visible. "We don't know yet what's been hit – if it's factories or residential infrastructure," he reported, adding that the city had also experienced drone attacks.


Large-scale Ukrainian drone attack on Crimea cuts power, burns refinery

FOX News

Fox News' Greg Palkot on the latest from the war in Ukraine as more weapons are sent from U.S. A massive Ukrainian drone attack on Crimea early Friday caused power cutoffs in the city of Sevastopol and set a refinery ablaze in southern Russia, Russian authorities said. The drone raids marked Kyiv's attempt to strike back during Moscow's offensive in northeastern Ukraine, which has added to the pressure on outnumbered and outgunned Ukrainian forces who are waiting for delayed deliveries of crucial weapons and ammunition from Western partners. Ukraine has not commented on the attack or claimed responsibility for it. The Russian Defense Ministry said air defenses downed 51 Ukrainian drones over Crimea, another 44 over the Krasnodar region and six over the Belgorod region. It said Russian warplanes and patrol boats also destroyed six sea drones in the Black Sea.


Russia-Ukraine war: List of key events, day 813

Al Jazeera

Visiting Kharkiv, Ukrainian President Volodymyr Zelenskyy said the situation in the northeast was "extremely difficult" but "under control" after the military partially halted a Russian advance, most notably thwarting an invasion of Vovchansk, 5km (3 miles) from the border with Russia. Sergiy Bolvinov, the head of police investigations in Ukraine's northeastern Kharkiv region, accused Russia of taking "30 to 40" civilians captive in Vovchansk to use as "human shields" near their command centre. General Christopher Cavoli, NATO's supreme allied commander in Europe, said he did not believe Russia's military had the troop numbers to make a strategic breakthrough in the Kharkiv region and he was confident Ukrainian forces would hold their lines there. Ukraine's General Staff said Russia was directing its most intense assaults on the front line near the cities of Pokrovsk and Kramatorsk in the eastern Donetsk region, where Russia's offensive has been unrelenting for months. An air raid alert in the northeastern Kharkiv region remained in place for more than 16 and a half hours amid Russian drone and missile attacks.


Optimizing Search and Rescue UAV Connectivity in Challenging Terrain through Multi Q-Learning

arXiv.org Artificial Intelligence

Using Unmanned Aerial Vehicles (UAVs) in Search and rescue operations (SAR) to navigate challenging terrain while maintaining reliable communication with the cellular network is a promising approach. This paper suggests a novel technique employing a reinforcement learning multi Q-learning algorithm to optimize UAV connectivity in such scenarios. We introduce a Strategic Planning Agent for efficient path planning and collision awareness and a Real-time Adaptive Agent to maintain optimal connection with the cellular base station. The agents trained in a simulated environment using multi Q-learning, encouraging them to learn from experience and adjust their decision-making to diverse terrain complexities and communication scenarios. Evaluation results reveal the significance of the approach, highlighting successful navigation in environments with varying obstacle densities and the ability to perform optimal connectivity using different frequency bands. This work paves the way for enhanced UAV autonomy and enhanced communication reliability in search and rescue operations.