Robust reinforcement learning algorithm based on pigeon-inspired optimization by Mingying ZHANG, Bing HUA, Yuguang ZHANG, Haidong LI, Mohong ZHENG

“…Reinforcement learning(RL) is an artificial intelligence algorithm with the advantages of clear calculation logic and easy expansion of the model.Through interacting with the environment and maximizing value functions on the premise of obtaining little or no prior information, RL can optimize the performance of strategies and effectively reduce the complexity caused by physical models .The RL algorithm based on strategy gradient has been successfully applied in many fields such as intelligent image recognition, robot control and path planning for automatic driving.However, the highly sampling-dependent characteristics of RL determine that the training process needs a large number of samples to converge, and the accuracy of decision making is easily affected by slight interference that does not match with the simulation environment.Especially when RL is applied to the control field, it is difficult to prove the stability of the algorithm because the convergence of the algorithm cannot be guaranteed.Considering that swarm intelligence algorithm can solve complex problems through group cooperation and has the characteristics of self-organization and strong stability, it is an effective way to be used for improving the stability of RL model.The pigeon-inspired optimization algorithm in swarm intelligence was combined to improve RL based on strategy gradient.A RL algorithm based on pigeon-inspired optimization was proposed to solve the strategy gradient in order to maximize long-term future rewards.Adaptive function of pigeon-inspired optimization algorithm and RL were combined to estimate the advantages and disadvantages of strategies, avoid solving into an infinite loop, and improve the stability of the algorithm.A nonlinear two-wheel inverted pendulum robot control system was selected for simulation verification.The simulation results show that the RL algorithm based on pigeon-inspired optimization can improve the robustness of the system, reduce the computational cost, and reduce the algorithm’s dependence on the sample database.…”
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Comprehensive Study of E-Bike Braking Dynamics: Modeling, Simulation, and Experimental Validation by Mutasim Salman, Shivam Chaturvedi, Wencong Su

“…The model includes bike and passive rider dynamics, wheel dynamics, the mechanical brake linkages and the tire-road friction interaction including tire slip. …”
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Research on cutting mechanism and process optimization method of gear skiving by Peng Wang, Yuanchao Ni, Xiaoqiang Wu, Jiaxue Ji, Geng Li, Jiahao Wu

“…To address this issue, this paper first establishes a finite element model of skiving the internal circular arc tooth in pin wheel housing, and the simulation model is simplified to improve computation efficiency. …”
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Examining the Effect of Alignment of the Rotor of the Emissions Exhaust Fan on Its Operating Parameters by Imrich Vojtko, Petr Baron, Martin Pollák, Jakub Kaščak

“…The first step of the operational balancing is to identify the initial vibration vector relative to the reference mark, arbitrarily located on the rotating wheel of the fan. In trial operation, the balancing weight mass was changed in the selected balancing level, resulting in the change of the vibration vector compared to the initial state. …”
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Modelling the Environmental Effects of Railway Vibrations from Different Types of Rolling Stock: A Numerical Study by Georges Kouroussis, David P. Connolly, Konstantinos Vogiatzis, Olivier Verlinden

“…Therefore rail unevenness or other irregularity on the rail/wheel surface can be accurately modelled. Vehicle speed is analysed and the frequency spectrums of track and soil responses are also assessed to investigate different excitation mechanisms, such as carriage periodicities. …”
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Evaluation analysis of the rodanya masbagia program in Magelang city: review of effectiveness and impact by Eny Boedi Orbawati, Tri Asih Wismaningtyas, Fadlurrahman Fadlurrahman, Ari Mukti

“…In conclusion, the Masbagia Wheel Program has been quite effective and beneficial to the community, but challenges in technical implementation still need to be overcome. …”
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Machine learning-driven power prediction in continuous extrusion of pure titanium for enhanced structural resilience under extreme loading by Ahmed Ghazi Abdulameer, Muhannad M. Mrah, Maryam Bazerkan, Luttfi A. Al-Haddad, Mustafa I. Al-Karkhi

“…A visualization highlighted the influence of process parameters, such as feedstock temperature and extrusion wheel velocity, on structural performance to align with the thematic focus of resilient material design. …”
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Nonlinear Robust Controller Applied to an Antilock Braking System With Estimation of Parametric Uncertainties and External Perturbations by Cuauhtemoc Acosta Lua, Stefano Di Gennaro

“…The Anti–lock Braking System (ABS) is an active safety feature that reduces braking distance in automobiles by preventing the wheels from locking and skidding. Achieving optimal braking conditions is challenging due to the nonlinear dynamics and parametric uncertainties present in both the longitudinal dynamics of the vehicle and the wheel dynamics. …”
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Analysis of the Influence of Cracked Sleepers under Static Loading on Ballasted Railway Tracks by Laura Montalbán Domingo, Clara Zamorano Martín, Cristina Palenzuela Avilés, Julia I. Real Herráiz

“…The principal causes of cracking in prestressed concrete sleepers are the dynamic loads induced by track irregularities and imperfections in the wheel-rail contact and the in-phase and out-of-phase track resonances. …”
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Use of GPS at research of roads & a vehicle by D. V. Mishuta, V. G. Мikhailov, M. V. Sirai

“…The purpose of this work are consideration of use of GPS for a research of roads and modeling of the vehicle/wheel machines (WM).Implementation for this problem of the measuring registering complex on a basis the Raspberry Pi 3/4 minicomputer, the GN-803G sensor and creation of the software in the language C/C ++ is considered.The obtained information about GPS and approaches of selection of necessary data from the messages on the basis of the NMEA 0183 standard submitted in the text ASCII form with the fields divided by a comma is analyzed. …”
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Research on Screw Propulsion Performance of Amphibious Robot by Pengfei XU, Zipeng WANG, Hailong LIN, Yan KAI, Qiao HU, Jianye SU

“…The traditional amphibious locomotion mode mainly features the dual system of wheel or track combined with a propeller. In contrast, single-system amphibious locomotion mode has become a research hotspot in recent years because of its low system complexity and high efficiency. …”
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Development and Field Testing of a Suspended Mulberry Branch Harvesting and Stubble Cutting Machine by Tianhong Liu, Yunpeng Yan, Haitao Sui, Fuyang Tian, Yinfa Yan, Bo Zhao, Zhanhua Song

“…The optimal parameter combination included a saw blade line speed of 74 m/s, a star-wheel ground clearance of 727 mm, and a cutting speed ratio of 93, resulting in a cutting energy consumption within 1 m of 241 mJ and a stubble score of 8.5. …”
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Dissociable effects of perceived control on reward-related neural dynamics under risk and ambiguity by Shiting Chen, Menglin Wu, Jianbiao Zhao, Guanglong Liu, Wendeng Yang, Ya Zheng

“…Here, we addressed this issue by measuring participants’ (N = 40) EEG activity while they were performing a wheel-of-fortune task. Participants either made choices themselves (a high control condition) or followed the computer's choice (a low control condition) under risky or ambiguous decision contexts. …”
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An Improved Harmony Search Algorithm for Proactive Routing Protocol in VANET by Ravie Chandren Muniyandi, Mohammad Kamrul Hasan, Mustafa Raad Hammoodi, Ali Maroosi

“…Therefore, this paper aims to propose an improved harmony search optimization (EHSO) algorithm that considers the configuration of the OLSR parameters by coupling two stages, a procedure for optimization carried out by the EHSO algorithm based on embedding two popular selection methods in its memory, namely, roulette wheel selection and tournament selection. The experimental analysis shows that the proposed approach has achieved the QoS requirement, compared to the existing algorithms.…”
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Polarization-Insensitive, High-Efficiency Metasurface with Wide Reception Angle for Energy Harvesting Applications by Abdulrahman Ahmed Ghaleb Amer, Nurmiza Othman, Mohammed M. Bait-Suwailamn, Syarfa Zahirah Sapuan, Ali Ahmed Ali Salem, Adeb Salh

“…The proposed MS features a novel wheel-shaped resonator array whose symmetrical structure ensures insensitivity to the polarization of incident electromagnetic (EM) waves, enabling efficient energy absorption and minimizing reflections. …”
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Investigation about crack propagation paths in thin rim gears by F. Curà, A. Mura, C. Rosso

“…Considering thin rim gears, when a crack is nucleated near the tooth root, it may propagate through the tooth (causing the loss of the entire tooth or a portion of it) or the propagation may follow a path across the wheel diameter (causing the projection of big parts of the gear that may break the gearbox and may cause serious damage to the aircraft). …”
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Development of an overarching framework for anticipating and assessing adverse and other unintended consequences of public health interventions (CONSEQUENT): a best-fit framework s... by Jan M Stratil, Eva A Rehfuess, Ani Movsisyan, Kathryn Oliver, Renke L Biallas

“…The a priori framework was designed using key elements of the WHO-INTEGRATE framework and the Behaviour Change Wheel, to root it in global health norms and values, established mechanisms of PH interventions and a complexity perspective. …”
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‘Hard’ and ‘soft’ approaches in active transport promotion: analysis and mapping of government policies by Nicholas J. R. Hunter, Benjamin Cramer, Erica Randle, Katherine A. Hunter

“…These three measures correspond to different policy categories in the behaviour change wheel framework, suggesting that each measure has specific functions for targeting active transport behaviours. …”
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Healthcare providers' (HCPs) perspectives in initiating discussion on mammogram screening, and their perceived barriers and enablers to screening in women-A qualitative study. by Xuefei Wang, Qi He Mabel Leow, Hwee Khim Lee, Ching Yee Mok, Wei Teen Wong, Hui Min Joanne Quah, Ngiap Chuan Tan

“…Focus group discussions (FGD) were conducted with a purposive sample of doctors and nurses from SingHealth Polyclinics between February 2019 to July 2020. "The Generalists' Wheel of Knowledge, Understanding and Inquiry" was adopted as the conceptual framework to design the interview guide and analyse the data.…”
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Characteristics of Recycled Concrete Aggregate and its Implementation for Pavement Base Applications: A Review by Shravan Kumar Gangu, Shankar Sabavath

“…The findings from the literature indicated that RCA is source-dependent, moisture sensitive, and subjected to particle breakdown under wheel load that results in reduced shear strength. …”
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