Controlling the Guanidinium Cation Rotation by Cation–π Interactions
Angewandte Chemie International Edition, EarlyView.A lanthanide π‐container has been employed to trap a guanidinium cation inside the aromatic cavity by cation–π interactions. X‐ray crystallography and solid‐state nuclear magnetic resonance (NMR) spectroscopy at fast magic‐angle spinning (MAS) frequencies have been utilized to probe the underlying host–guest interactions.
Hannah Busch +12 more
wiley +1 more source
Aerodynamic Optimization Design of an Orthogonal Octo-Rotor UAV in a Hovering State
DronesThis paper presents a novel orthogonal octo-rotor Unmanned Aerial Vehicle (UAV) and addresses the aerodynamics of the UAV with varied rotor spacing by both numerical simulations and experiments.
Yao Lei +5 more
doaj +1 more source
Study on Dynamics Characteristic of High Speed Herringbone Gear Transmission System
Jixie chuandong, 2019 Based on the finite element numerical analysis method， the dynamics equation of herringbone gear transmission system is given and the model of rotor-bearing-gear dynamics system is established.
Yongchao Yuan +4 more
doaj
Characteristics of a hydro power rotor system due to a sudden loss of magnetic field
, 2006 This paper addresses dynamics of the rotor, which is vertically secured in one immovable hinge and one elastic support. There were received and analyzed equations of dynamics for description of disk-shaped and cylindrical rotor with dynamic unbalance ...
Karlsson, Martin,, Aidanpää, Jan-Olov,
core
A rational approach to comparing the performance of coaxial and conventional rotors
, 2009 The merit, in terms of its efficiency and performance, of the twin, contrarotating coaxial rotor configuration over the more conventional single rotor system has long been a point of contention.
Brown, R.E., Kim, Hyo Wan
core +1 more source
Overcrowded Alkene Photo‐Redox‐Switches Based on Quinolinium/Carbene Building Blocks
Angewandte Chemie International Edition, EarlyView.A modular synthesis of a new class of photo‐ and redox‐switches is described based on the combination of quinolinium salts and carbenes. Photochemical switching allows to selectively switch between folded E/Z isomers, while electrochemical switching allows to change between neutral, radical cation and dicationic oxidation states, which are all isolable
Chris Burdenski +10 more
wiley +1 more source
Full Annular RUB in Mechanical Seals, Part I: Experimental Results
International Journal of Rotating Machinery, 2002 Donald E. Bently +3 more
doaj +1 more source
Complexity Analysis of Bubble Plumes in Power Law Fluids Based on Chaos Theory
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT In order to reveal the complexity of the internal flow of bubble plume in power law fluid, the flow characteristics and chaotic characteristics of plume are studied by experiment and theory. The chaotic characteristic parameters (correlation dimension D, K entropy, and Lyapunov exponent λ) of gas velocity under different superficial gas ...
Xin Dong +6 more
wiley +1 more source
Influence of the Blades Configuration on the Dynamics of a 3-Bladed Jeffcott Rotor
, 2015 The nonlinear behaviour of blade rubbing has usually been investigated using complex modelling for the contact description. However, a simplified model of a 3-bladed Jeffcott rotor with nonlinear beam deformation contacting a fixed ring due to initial ...
Jan-Olov Aidanpää +3 more
core +1 more source
Construction of Lean Coal Molecular Structure Model Based on Spectroscopic Characterization
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT The chemical structure of coal exerts a profound influence on its properties and utilization pathways. A comprehensive analysis of coal's molecular structure is crucial for mitigating environmental pollution arising from coal combustion and improving the efficiency of coal utilization.
Song Liu +5 more
wiley +1 more source