Results 111 to 120 of about 388,267 (293)

Analysis of the Dynamics Characteristic of Single Section Train with Considering the Torsional Vibration of Transmission System

Jixie chuandong, 2016
In order to analyze the influence of vibration of transmission system on vehicle dynamics performance,the train drive system is simplified as a series system containing shaft segments and equivalent disc,a whole multi- body dynamics model of a high speed
Chen Zheming, Wang Lizhang, Yu Yang
doaj  

Raman Optical Activity as a Tool to Monitor Polynucleotide Conformation in Solutions

Chemistry – A European Journal, EarlyView.
Raman optical activity (ROA) studies of nucleic acids have been hindered by limited computational tools to link the spectra to the structure. The study shows that accurate density functional simulations are possible for model nucleotides, bringing more information about molecular geometry and dynamics in solutions.
Mohammed Siddhique Para Kkadan, Josef Kapitán, Jiří Kessler, Ondřej Zapletal, Valery Andrushchenko, Petr Bouř   +5 more
wiley   +1 more source

Research on predictive control of helicopter/engine based on LMS adaptive torsional vibration suppression

Journal of Low Frequency Noise, Vibration and Active Control, 2018
In order to achieve the fast response of turboshaft engine combined with torsional vibration, a predictive controller of helicopter/engine based on the least mean square adaptive torsional vibration suppression is proposed and designed.
Yong Wang, Qiangang Zheng, Haibo Zhang, Haoying Chen   +3 more
doaj   +1 more source

Electrochemiluminescence of Heteroleptic Iridium(III) Complexes Featuring Substituted 2,4‐diphenylpyridinato Ligands

Chemistry – A European Journal, EarlyView.
Five heteroleptic iridium(III) complexes bearing cyclometalated 2,4‐diphenylpyridinato ligands were synthesized and their electrochemiluminescence (ECL) investigated. Two different coreactants were evaluated: tri‐n‐propylamine and benzoyl peroxide under anodic and cathodic potentials, respectively.
Ovini Jayawardana, El M. S. Martin, Oliver G. Stansfield, Egan H. Doeven, Carol Hua, Timothy U. Connell, Paul S. Francis   +6 more
wiley   +1 more source

Iso‐Tellurazole N‐Oxides Assemble Adaptively Folded Macrocyclic Dodecamers

Chemistry – A European Journal, EarlyView.
Te…O Chalcogen bonding links twelve molecules into a ring that wraps itself around molecular guests. ABSTRACT Self‐assembled macrocyclic dodecamers were found in the crystals of new pseudo‐polymorphs of iso‐tellurazole N‐oxides. These structures are formed by molecules connected by NTe…O chalcogen bonds and are folded in a pattern that defines 89–153 ...
Jin Z. Wang, Phillip MacDougall, Mich W. Zeng, James F. Britten, Ignacio Vargas‐Baca   +4 more
wiley   +1 more source

A Two-Disk Extended Jeffcott Rotor Model Distinguishing a Shaft Crack from Other Rotating Asymmetries

International Journal of Rotating Machinery, 2008
A mathematical model of a cracked rotor and an asymmetric rotor with two disks representing a turbine and a generator is utilized to study the vibrations due to imbalance and side load.
Xi Wu, Jim Meagher
doaj   +1 more source

Exploring the Boundaries of Aromaticity in Complex Structures and Excited States Through Computational Analysis

Chemistry – A European Journal, EarlyView.
Understanding aromaticity has evolved from benzene‐centric concepts to a broad multidimensional framework spanning organic, inorganic, and excited‐state systems. This review highlights ambiguities between magnetic, electronic, geometric, and energetic descriptors, emphasizing the need for unified, multi‐criteria approaches.
Sílvia Escayola, Miquel Solà, Albert Poater   +2 more
wiley   +1 more source

Mode Transition Phenomenon of Herringbone Gear Power-split Transmission System

Jixie chuandong, 2019
The mode transition will bring about the dramatical changes of the dynamics characteristics of the herringbone gear power-split transmission system， so the mode transition phenomenon must be analyzed in the process of the transmission system dynamic ...
Jincheng Dong, Sanmin Wang
doaj  

Designing a Triplet 2‐Formylphenylnitrene With Fast Tunneling Reactivity

Chemistry – A European Journal, EarlyView.
A 3‐CF3 substituent accelerates tunneling in triplet 2‐formylphenylnitrene, making its reactivity in cryogenic matrices too fast for conventional IR spectroscopic detection. Bringing this chemistry to low‐temperature solutions allows suppression of intrinsic nitrene dimerization through faster cyclization, which even outcompetes the 1,4‐H shift ...
Sofia Braz, Cláudio M. Nunes, Simon Schlosser, Peter R. Schreiner, Rui Fausto   +4 more
wiley   +1 more source

Numerical simulation study on the characteristics and propagation attenuation of vibration signals in freezing pipe fracture

Deep Underground Science and Engineering, EarlyView.
This research study employs analysis system (ANSYS) fluid–structure interaction simulations to investigate the generation and attenuation of vibration signals resulting from freezing pipe fractures in artificial ground freezing projects. By evaluating key variables—including frozen soil elastic modulus, brine inlet pressure, and external pipe pressure ...
Yi Cao, Yansen Wang, En Chen, Meng Zhao
wiley   +1 more source