Results 111 to 120 of about 52,295 (267)

Stability Analysis and Control Design for Hybrid AC-DC More-Electric Aircraft Power Systems [PDF]

, 2013
This thesis studies the stability of a more-electric aircraft (MEA) power system with hybrid converters and loads, and proposes a control design method using state feedback.
Li, Xiao
core  

Research on Integrated Lifting of Carrier⁃Based Aircraft

Nanjing Hangkong Hangtian Daxue Xuebao
The integrated lifting of carrier-based aircraft is critical to aircraft carrier groups， as it can trasport the damaged aircraft that cannot fly to land-based facilities for repair. This study addresses key challenges in the integrated lifting of carrier-
HUANG Jinchang, GOU Yikun, WANG Xiangyu
doaj   +1 more source

Optimization of 3D‐Printed Structured Packings—Current State and Future Developments

Chemie Ingenieur Technik, EarlyView.
This paper gives an overview about structured packing development for distillation, surveying heuristic development cycles, computational fluid dynamics simulations, and additive manufacturing techniques. The emerging application of shape optimization to improve packings is emphasized, and its benefits, impact, and limitations are discussed.
Dennis Stucke, Sebastian Blauth, Christian Leithäuser, Thomas Grützner   +3 more
wiley   +1 more source

Design methodology for wing trailing edge device mechanisms [PDF]

, 2007
Over the last few decades the design of high lift devices has become a very important part of the total aircraft design process. Reviews of the design process are performed on a regular basis, with the intent to improve and optimize the design process.
Martins Pires, Rui Miguel
core  

Airworthiness study on civil aircraft engine operating characteristics

Hangkong gongcheng jinzhan
Engine operating characteristics of civil aircraft engines are one of the most basic and complex verification subjects in the airworthiness certification process of the Part 25 "airworthiness standard for transport aircraft" of China civil aviation ...
DENG Tianze, YANG Fei, ZHU Yan, QIU Jian, ZHONG Weixing   +4 more
doaj   +1 more source

Innovation and Growth Investment Through Capital Expenditure as a Channel and Boundary Condition Between Financial Performance and Corporate Reputation

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT This study examines the role of capital expenditure in the relationship between financial performance and corporate reputation. Using moderation and mediation analyses based on multiple regressions with bootstrapping, we examined data from 121 airlines from 46 countries during 2007–2023.
Larissa M. Batrancea, Andreas‐Daniel Cocis, Ioan Dan Morar   +2 more
wiley   +1 more source

Corporate Social Responsibility and Corporate Tax Avoidance in Europe: Evidence From the Anti‐Tax Avoidance Directives

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT This study examines the relationship between corporate social responsibility (CSR) and corporate tax avoidance (CTA) in the European Union, exploiting institutional variation arising from CSR disclosure regimes and the introduction of the Anti‐Tax Avoidance Directives (ATAD).
Alessandro Migliavacca
wiley   +1 more source

Enhancing hydrogen evolution reaction by harnessing bubble dynamics regulation: Principles, methods, and outlook

Droplet, EarlyView.
Bubble dynamics pose critical bottlenecks to hydrogen evolution reaction efficiency, causing active site isolation, increased ohmic resistance, and concentration overpotential, especially at high current densities. This review comprehensively summarizes passive and active bubble manipulation strategies, elucidates their underlying principles, and ...
Ziwei Guo, Chunhui Zhang, Yunxun Liu, Yi Han, Jinghang Pan, Lingyao Zhang, Chuanqi Nie, Yuejing Zhao, Kesong Liu, Cunming Yu, Lei Jiang   +10 more
wiley   +1 more source

Hydrogen aircraft concepts and ground support

, 2005
As worldwide petroleum supplies diminish and prices escalate, the aviation industry will be forced to consider relying on energy resources other than kerosene for its aviation fuel needs.
Sefain, Michael J.
core  

Climate impact evaluation as part of aircraft pre-design

, 2009
Here we present a methodology, which allows for an optimization of aircraft design aspects with regard to climate change. During the optimization, each iteration requires an estimate of a 3d emission distribution and from that an estimate of the climate ...
Ulrich Schumann, Koch, Alexander, Katrin Dahlmann, Sausen, Robert, Schumann, Ulrich, Dahlmann, Katrin, Robert Sausen, Volker Grewe, Bernd Kärcher, Fichter, Christine, Kärcher, Bernd, Alexander Koch, Gollnick, Volker, Christine Fichter, Grewe, Volker, Volker Gollnick   +15 more
core   +1 more source