Results 21 to 30 of about 951 (221)

A Versatile‐Designable Framework for Active and Programmable Shape‐Morphing Soft Matter Systems: From Inverse Design to Closed‐Loop Control

Advanced Science, EarlyView.
A versatile framework integrates addressable electrothermal actuation and strain‐constraint mechanisms to construct programmable shape‐morphing soft matter systems. By combining an analytical inverse design strategy for high‐fidelity 3D surface reconstruction with deep learning‐based closed‐loop control, this approach enables zero‐energy shape locking,
Kai Liu, Peiling Xie, Ruitong Song, Banghan Liu, Rui Guo, Jiu‐an Lv   +5 more
wiley   +1 more source

Gear Backlash Detection and Evaluation Based on Current Characteristic Extraction and Selection

IEEE Access, 2020
Motor Current Signal Analysis (MCSA) is widely used in the monitoring of electric motors, but few researchers applied it in the transmission system because of the fault information loss and aliasing of current signals.
Qichao Yang, Tao Liu, Xing Wu, Yunnan Deng   +3 more
doaj   +1 more source

Bioinspired Multifunctional Flexible C‐SiC Fibrous Aerogel for Superior Electromagnetic Interference Shielding Under Extreme Environments

Advanced Science, EarlyView.
This schematic presents a biomimetic C‐SiC fibrous aerogel inspired by the special structure of momordica charantia. It exhibits outstanding thermal insulation and ultrahigh specific electromagnetic shielding performance, together with excellent high‐temperature stability and mechanical flexibility, showing great promise for aerospace applications ...
Tianyue Yang, Yan Shen, Zhongqian Zhao, Xue Zhou, Qianji Chen, Xujing Wang, Chuchu Zheng, Zhaoxiang Lu, Yangzhong Zhao, Yanzi Gou   +9 more
wiley   +1 more source

Dynamic Analysis of a Fault Planetary Gear System under Nonlinear Parameter Excitation

Shock and Vibration, 2021
In order to facilitate lubrication and avoid the gear stuck due to thermal expansion, there needs to be a gap between the tooth profiles. As a strong nonlinear factor, the backlash will affect the motion state of the planetary gear system.
Jianchao Han, Yinghui Liu, Lei Liang, Yang Zhao, Huibo Zhang   +4 more
doaj   +1 more source

Counting cases, conserving species: addressing highly pathogenic avian influenza in wildlife

Biological Reviews, EarlyView.
ABSTRACT Highly pathogenic avian influenza (HPAI) has become a critical threat to wildlife, shifting from a seasonal epizootic to a persistent, year‐round panzootic with global consequences. Here, we summarise the origin, evolutionary mechanisms, and expanding host range of the current H5N1 virus (clade 2.3.4.4b) and assess its impact on wildlife. Over
Ulrich Knief, Sandra Bouwhuis, Anja Globig, Anne Günther, Wouter Courtens   +4 more
wiley   +1 more source

Study on Dynamics of Planetary Gear Transmission Considering Backlash

Jixie chuandong, 2021
Taking cylindrical spur gear as study object，a nonlinear dynamics model of planetary gear transmission system is established by using mass concentration method.
Da Min, Guangming Zou, Xingdong Wang, Wei Tang   +3 more
doaj  

How Do Carbon Emissions Affect the Performance of Listed Latin American Firms? The Moderating Effect of Financial Slack

Business Strategy and the Environment, EarlyView.
ABSTRACT This study analyses the association between carbon emissions and financial performance in Latin American firms. The scientific literature on this topic is limited, with little evidence available in this geographical region. This study aims to address this research gap by testing hypotheses focused on analysing how Scope 1, 2 and 3 carbon ...
Ana Isabel Mendieta‐Callirgos, Maria Carmen Pérez‐López, Ismael Muñoz‐Pérez, Germán López‐Pérez   +3 more
wiley   +1 more source

Impacts of Backlash on Nonlinear Dynamic Characteristic of Encased Differential Planetary Gear Train

Shock and Vibration, 2019
A multifreedom tensional nonlinear dynamic equation of encased differential planetary gear train with multibacklash and time-varying mesh stiffness was developed in the present research.
Zengbao Zhu, Longchao Cheng, Rui Xu, Rupeng Zhu   +3 more
doaj   +1 more source

Voices From the Coast: Stakeholder Participation and Perception on Creating a Marine Protected Area

Business Strategy and the Environment, EarlyView.
ABSTRACT This study explores participatory processes in the context of marine conservation, with a specific focus on recent initiatives undertaken by the Apulia region in Italy to establish a new Marine Protected Area (MPA). Employing a qualitative cross‐sectional methodology, the study investigates how local communities perceive and engage with the ...
Giampiero Palazzo, Giuseppe Valenza, Massimo Zuccaro, Simone Pizzi   +3 more
wiley   +1 more source

齿侧间隙对齿轮机构响应频率的影响研究

Jixie chuandong, 2011
In order to simulate the effects of backlash on response frequency of gear mechanism in engineering application,the multi-rigid-model of one-stage gear mechanism including backlash is established.The parameters of geartooth contact-impact force model are
肖回鹏, 罗欣, 徐振高
doaj