Results 51 to 60 of about 214,613 (295)

An overview of the impact of COVID-19 on the cruise industry with considerations for Florida

Transportation Research Interdisciplinary Perspectives, 2021
This paper provides an overview of the current state of the world’s cruise industry, with a focus on the chronology and the main impacts that the COVID-19 has had on the industry.
Ana Lucia Rodrigues da Silva
doaj   +1 more source

Enhanced Responsivity, Accuracy, and Stability of Aerosol Jet Printing via Mechanical Switching Valve Assisted Internal Shuttering

Advanced Science, EarlyView.
This work demonstrates ultra‐high ON‐OFF responsivity of AJP by mechanical switching valve assisted shuttering. The jet relaxation and ON‐OFF delay are substantially eliminated from greater than 35 s, maintaining patterning quality independent of the variations of printing parameters, permitting excellent process stability and universality.
Jinhang Wang, Li Meng, Shuhuan Zhang, Pan Chen, Kaiwen Wei, Beibei Zhu, Xiaoyan Zeng   +6 more
wiley   +1 more source

Optimal Guaranteed-Cost Composite Nonlinear Feedback Cruise Control for Heavy-Haul Trains

IEEE Access
To enhance transient control performance and achieve multi-objective optimization in terms of speed tracking accuracy, safety, and energy consumption, this paper explores a novel fuzzy optimal guaranteed-cost composite nonlinear feedback (CNF) cruise ...
Jia Wang, Qian Zhang, Zhiqiang Chen, Yougen Xu, Zhiwen Liu   +4 more
doaj   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Poly(vinylidene Fluoride)‐Based Ferroelectric Polymers for Electromechanical Transduction: A Systematic Review of Materials and Actuators

Advanced Intelligent Systems, EarlyView.
Poly(vinylidene fluoride) (PVDF)‐based ferroelectric materials exhibit high strains, energy densities and coupling efficiencies, appealing for diverse applications requiring smart material actuators. This work reviews electromechanical transduction in PVDF‐based polymers and their modifications, implementation in actuators, and functional devices ...
Giulio Gallucci, Andres Hunt
wiley   +1 more source

Design Challenges to Expand the Functionality of Drones: Deformable Rotorcraft and Nature‐Inspired Flapping Drones

Advanced Intelligent Systems, EarlyView.
This review systematically analyzes deformable drones, including extendable, foldable, and tilting configurations, along with nature‐inspired flapping rotorcraft. By classifying deformation principles and structural mechanisms, design trade‐offs, functional capabilities, and future development potential are highlighted.
Ju‐Hee Lee, Sumin Jung, Jinwoo Jang, Yeji Han, Minchae Kang, Jihun Seong, Suyeon Seo, Eunsol Park, Haesol Kwak, Min‐Woo Han   +9 more
wiley   +1 more source

Using a bottom-up method to assess cruise ship activity impacts on emissions during 2019–2020 in China

Heliyon
COVID-19 has had a serious impact on the development of the global shipping industry, especially since the impact on the cruise tourism industry was unprecedented.
Qiong Chen, Yui-yip Lau, Maneerat Kanrak, Xiaodong Sun, Pengfei Zhang, Yuk-Ming Tang   +5 more
doaj   +1 more source

Gaussian learning‐based fuzzy predictive cruise control for improving safety and economy of connected vehicles

IET Intelligent Transport Systems, 2020
This study considers an adaptive cruise control problem of connected vehicles in the vehicular ad‐hoc network and proposes a Gaussian learning‐based fuzzy predictive cruise control approach to enhance the fuel efficiency and safety of the connected ...
Defeng He, Binbin Peng
doaj   +1 more source

Programmable‐Stiffness Tensegrity Continuum Robot for Adaptive Multicurvature On‐Orbit Assembly

Advanced Intelligent Systems, EarlyView.
A bioinspired tensegrity‐based continuum robot (BTCR) with programmable stiffness enables adaptive multicurvature morphing via coordinated intra‐ and intermodule regulation. A unified energy‐based framework predicts self‐equilibrium and deformation for serial modules. Experiments and Simulations demonstrate reconfiguration into hexagonal, circular, and
Yubin Wu, Yongliang Cao, Yi Jin, Ziyu Wang, Li‐Yuan Zhang, Changyong Chase Cao   +5 more
wiley   +1 more source

Design of adaptive cruise control strategy for EREV considering driving behavior

Frontiers in Mechanical Engineering
IntroductionTraditional adaptive cruise control systems ignore the impact of the driver’s intentions and driving behavior on system performance.MethodsIn response to this issue, this study designs a new adaptive cruise control system by combining ...
Jianwei Zhang, Tao Wang
doaj   +1 more source