Results 61 to 70 of about 5,311 (260)

Unveiling the Ultralow Thermal Conductivity of Hybrid Perovskites

Advanced Science, EarlyView.
In hybrid perovskites, thermal energy flows through lattice vibrations of the framework (48%–65%) and organic molecules (35%–52%). When the disorder introduced by organic molecules is excluded, the temperature dependence of the vibrational thermal conductivity results from the lattice framework transits from ∼T0 to ∼T−1, and the value doubles at room ...
Qinqin He, Yuli Chen, Zhigang Li, Yanguang Zhou   +3 more
wiley   +1 more source

Multi-Band Torsional Vibration Amplitude Demodulation for Planetary Gearbox Fault Diagnosis Under Time-Varying Speed Conditions

IEEE Access
Torsional vibration signal analysis is promising for diagnosing gear faults in planetary gearboxes. However, early-stage fault signatures are relatively-weak and may be ignored or wrongly identified in conventional demodulation analysis, especially under
Xiaowang Chen, Yubo Sun, Ying Zhang, Zhipeng Feng   +3 more
doaj   +1 more source

Partial Frequency Assignment for Torsional Vibration Control of Complex Marine Propulsion Shafting Systems

Applied Sciences, 2019
With the large-scale and complexity of ship propulsion shafting, it is more difficult to analyze and control the torsional vibration of shafting. Therefore, an effective control method for the torsional vibration of shafting is of great significance in ...
Meilong Chen, Huajiang Ouyang, Wanyou Li, Donghua Wang, Siyuan Liu   +4 more
doaj   +1 more source

From Sourcing to End‐of‐Life: Sustainability Challenges and Opportunities in Organic Bioelectronics

Advanced Science, EarlyView.
Organic bioelectronics bridges biology and electronics using organic mixed ionic/electronic conductors. This Perspective addresses sustainability across the full lifecycle of organic bioelectronic materials and devices, offering a framework to guide material sourcing, synthesis, fabrication, application, and end‐of‐life strategies toward bioelectronic ...
Gwennaël Dufil, Marine Batista, Andrea Bionda, Erica Zeglio   +3 more
wiley   +1 more source

Bending‐Induced Vibrational Landscape Reorganization Governs Energy Dissipation in Perylene Bisimides

Angewandte Chemie, EarlyView.
Gradually bent perylene bisimides (PBIs) isolate structural distortion as the sole variable and exhibit negligible intersystem crossing, uncovering rapid vibrational dephasing as the dominant driver of internal conversion through excited‐state vibrational landscape reorganization.
Wei Zhang, Di Zhao, Byeongjoo Kang, Hui‐Jun Zhang, Yeonju Park, Young Mee Jung, Woojae Kim, Jianbin Lin, Dongho Kim   +8 more
wiley   +2 more sources

Torsional vibration analysis of shaft with multi inertias. [PDF]

Sci Rep, 2022
Peng T, Yan Q.
europepmc   +1 more source

Research on Doubly-Fed Wind Turbine Shaft System With Virtual Inertia for Torsional Vibration Analysis

发电技术
ObjectivesShafting mathematical model of wind turbine is the basis of torsional vibration characteristics analysis. Shafting model is very important for the reliability of analysis results.
SUN Zhenglong, SAN Jiqiang
doaj   +1 more source

Thin‐Film Thermal Sensors on Chitosan Substrates for Sustainable Transient Electronics

Advanced Electronic Materials, EarlyView.
Fully transient thin‐film temperature sensors are realized on pure chitosan substrates using Mo‐based RTDs and a‐IGZO/Mo thermistors. The devices exhibit high sensitivity, mechanical flexibility, humidity‐aware operation, and complete dissolution in natural solvents.
Ahmed Rasheed, Soufiane Krik, Sundus Riaz, Hafiza Faiqa Maqsood, Jacopo Nicoletti, Riccardo Zamboni, Guglielmo Trentini, Pietro Ibba, Franco Cacialli, Andrea Gaiardo, Giuseppe Cantarella, Niko Münzenrieder, Paolo Lugli, Giovanni Antonio Salvatore, Luisa Petti   +14 more
wiley   +1 more source

One Molecular Platform, Three Distinct Narrowband Organoboron TADF Emitters: A Divergent One‐Pot Strategy From Green to Red

Angewandte Chemie, EarlyView.
One platform–three emitters: Divergent one‐pot borylation of a single indolocarbazole platform exploits competing mono‐ and double‐borylation pathways to generate three spectrally distinct organoboron MR‐TADF emitters spanning green to red, enabling color‐tunable narrowband OLEDs with external quantum efficiencies over 30%.
Jun Hyeon Lee, Minlang Yang, Takuma Yasuda   +2 more
wiley   +2 more sources

LQR Control of Axial-Torsional Bidirectional Vibration of Drill String in Oil and Gas Wells

Shiyou jixie
To effectively solve the failure problem induced by axial-torsional bidirectional vibration of drill string， with the help of the 3-DOF dynamics model of drill pipe， a simulation study was performed on the suppression of linear quadratic regulator （LQR ...
Li Xinye, Zhang Wenbo, Guo Xiaoqiang, Zhang Wenxue, Ye Chengyang   +4 more
doaj   +3 more sources