Results 41 to 50 of about 228,716 (275)

Competitiveness Evaluation Method of Supersonic Civil Aircraft Based on Analytic Hierarchy Process

Aerospace
As the demand for long-distance flights continues to increase, supersonic transport (SST) has once again become a hot research topic. However, in the conventional research on competitiveness of civil aircraft, because the flight speeds of various ...
Jiazheng He, Rui Pan, Wenyuan Cheng, Chenxin Guo, Zhijun Meng   +4 more
doaj   +1 more source

Pnma-BN: Another Boron Nitride Polymorph with Interesting Physical Properties

Nanomaterials, 2016
Structural, mechanical, electronic properties, and stability of boron nitride (BN) in Pnma structure were studied using first-principles calculations by Cambridge Serial Total Energy Package (CASTEP) plane-wave code, and the calculations were performed ...
Zhenyang Ma, Zheng Han, Xuhong Liu, Xinhai Yu, Dayun Wang, Yi Tian   +5 more
doaj   +1 more source

Research on Verification Method of Civil Aircraft Maintenance Manual

Hangkong gongcheng jinzhan, 2021
The maintenance procedure of domestic civil aircraft has the problem of incomplete verification method,so it is necessary to study its verification method.According to the procedure type and content of aircraft maintenance manual technique,three ...
ZHANG Yajie, ZENG Qinglin, WANG Hongchao, SHEN Ping, TU Zhiqi, ZHOU Yinqiu   +5 more
doaj   +1 more source

Sudan at War With Itself: Civilian Devastation in the Civil War

Conflict Resolution Quarterly, EarlyView.
ABSTRACT A civil war is raging in Sudan between the Sudan Armed Forces (SAF) and the Rapid Support Forces (RSF) along with militia groups. Beginning on April 15, 2023, and continuing at least to this writing (October 15, 2025), civilian noncombatants have been subjected to bombings, beatings, torture, shootings, rape, and murder on a large scale. Since
Daniel Rothbart, Bayan Abubakr, Beltina Gjeloshi, Dieter Pfoser   +3 more
wiley   +1 more source

Civil aircraft system process assurance application based on ARP4754A

Hangkong gongcheng jinzhan
“Guidelines for development of civil aircraft and systems” is a recommended and accepted standard for the airworthiness of civil aircraft systems，which provides a structured development process assurance method to identify and correct development errors.
ZHOU Pei, LI Jing, XIE Hongman
doaj   +1 more source

Failure in Motion: A Framework for Capability Erosion and Institutional Dysfunction

Strategic Change, EarlyView.
ABSTRACT Drawing on the literature on capability erosion and institutional dysfunction (ID), this study develops a conceptual framework that sheds new light on how the interaction between capability erosion and ID creates conditions for business failure across borders. By articulating two dimensions of heterogeneous capability and resource erosion (i.e.
Joseph Amankwah‐Amoah, Ahmed Adel Tantawy   +1 more
wiley   +1 more source

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

Interaction Between Vortex‐Induced Vibrations and Base Vibrations in Piezoelectric Harvesters

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In the present era, powering sensors using green energy is a significant challenge. One promising solution for the power supply of small sensors relies on piezoelectric energy harvesters excited by vortex‐induced vibrations (VIVs) generated by wind.
Michele Tonan, Ilaria Palomba, Alberto Pasetto, Alberto Doria   +3 more
wiley   +1 more source

Integrated Inertial/gps [PDF]

, 1990
The presence of failures in navigation sensors can cause the determination of an erroneous aircraft state estimate, which includes position, attitude, and their derivatives.
Kline, Paul, Vangraas, Frank
core   +1 more source

Uncertainty, Sensitivity, and Efficiency Analysis of a Hybrid Piezoelectric–Electromagnetic Energy Harvester

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Digitalization and emerging technologies are increasing the demand for wireless sensing and the Internet of Things (IoT), which provide opportunities for autonomous sources of electricity in the form of energy harvesting systems. This paper focuses on the challenges in hybrid piezoelectric‐electromagnetic kinetic energy harvesting systems that
Petr Sosna, Damian Gaska, Zdeněk Hadaš
wiley   +1 more source