Results 51 to 60 of about 338,682 (292)

Automatic Vertical Parking Reference Trajectory Based on Improved Immune Shark Smell Optimization

Algorithms
Parking path optimization is the principal problem of automatic vertical parking (AVP); however, it is difficult to determine a collision avoiding, smooth, and accurate optimized parking path using traditional parking reference trajectory optimization ...
Yan Chen, Gang Liu, Longda Wang, Bing Xia   +3 more
doaj   +1 more source

Trajectory planning of unmanned aerial vehicle based on the improved biogeography-based optimization algorithm

Advances in Mechanical Engineering, 2021
This paper is concerned with trajectory planning for unmanned aerial vehicle in a three-dimensional complex workspace. Biogeography-based optimization algorithm is widely used in solving practical problems because of its fewer parameters, fast ...
Zhishuang Xue, Xiaofang Liu
doaj   +1 more source

Molecular dynamics simulations of positively selected codons in FcγRI reveal novel biochemical binding properties

FEBS Open Bio, EarlyView.
Evolutionary analysis across 32 placental mammals identified positive selection at residues H148 and W149 in the immune receptor FcγR1. Ancestral reconstruction combined with molecular dynamics simulations reveals how these mutations may influence receptor structure and dynamics, providing insight into the evolution of antibody recognition and immune ...
David A. Young, Omar Arias‐Gaguancela, Fiona Gibson, Morgan Grainger, Jodie Score, Amit Nathubhai, Mauricio Cafiero, Lee Richard Machado   +7 more
wiley   +1 more source

A time-independent trajectory optimization approach for connected and autonomous vehicles under reservation-based intersection control

Transportation Research Interdisciplinary Perspectives, 2021
Rule-based and optimization-based autonomous intersection management (AIM) policies have been evaluated against traditional signal controls in terms of intersection safety, efficiency and emission.
Muting Ma, Zhixia Li
doaj   +1 more source

Natural Products as Geroprotective Modulators in Diabetic Nephropathy: A Mechanistic Framework Integrating Aging Hallmarks and the AMPK–SIRT1–Nrf2 Axis

Aging and Cancer, EarlyView.
Natural products target the aging kidney in diabetic nephropathy by restoring the AMPK–SIRT1–Nrf2 axis, reducing oxidative stress, inflammation, fibrosis, and cellular senescence while enhancing mitochondrial biogenesis and antioxidant defenses.
Sherif Hamidu, Latif Adams, Eunice Ampem‐Danso, Justice Kumi, Abigail Aning, Fatima Hamidu, Mustapha Abdul Mumin Mohammed, Ayuba Nii Darku Ankrah, Seth Kwabena Amponsah   +8 more
wiley   +1 more source

Reentry Trajectory Optimization of Hypersonic Vehicle Based on Multi-Strategy Improved WOA Optimized Attention-LSTM Network

Aerospace
Trajectory optimization of hypersonic vehicles face challenges from complex aerodynamic environments and multiple constraints, where traditional offline optimization methods struggle to meet real-time requirements.
Encheng Dai, Guangbin Cai, Yonghua Fan, Hui Xu, Hao Wei, Xin Li   +5 more
doaj   +1 more source

Bone density optimized pedicle screw insertion

Frontiers in Bioengineering and Biotechnology, 2023
Background: Spinal fusion is the most common surgical treatment for the management of degenerative spinal disease. However, complications such as screw loosening lead to painful pseudoarthrosis, and are a common reason for revision. Optimization of screw
Christos Tsagkaris, Anna-Katharina Calek, Anna-Katharina Calek, Marie-Rosa Fasser, Marie-Rosa Fasser, José Miguel Spirig, Sebastiano Caprara, Sebastiano Caprara, Mazda Farshad, Mazda Farshad, Jonas Widmer, Jonas Widmer   +11 more
doaj   +1 more source

Re‐Awakening Public Attention to the Silent Pandemic of Cancer Among Older Adults in Low‐ and Middle‐Income Countries

Aging and Cancer, EarlyView.
ABSTRACT As global populations age, cancer is increasingly becoming a leading cause of morbidity and mortality among older adults, particularly in low‐ and middle‐income countries (LMICs). Despite accounting for the majority of new cancer cases and deaths, older individuals remain underrepresented in cancer research, clinical guidelines, and health ...
Ibrahim Bidemi Abdullateef, Sunkanmi Folorunsho, Abdulazeez Opeyemi Abdulganiyu   +2 more
wiley   +1 more source

Interplanetary Trajectory Optimization with Powerlimited Propulsion Systems [PDF]

, 1962
A trajectory-optimization process is described in which the optimum thrust equations are derived using the calculus of variations. The magnitude of the thrust is constrained within an upper and a lower bound, but the thrust direction is arbitrary.
Melbourne, W. G., Richardson, D. E., Sauer, C. G., Jr.   +2 more
core   +1 more source

Cellular-Enabled UAV Communication: Trajectory Optimization Under Connectivity Constraint

, 2017
In this paper, we study a cellular-enabled unmanned aerial vehicle (UAV) communication system consisting of one UAV and multiple ground base stations (GBSs).
Zeng, Yong, Zhang, Rui, Zhang, Shuowen
core   +1 more source