Results 51 to 60 of about 18,809 (307)

Real World Fuel Consumption and Emissions From LDVs and HDVs

Frontiers in Mechanical Engineering, 2019
Real world emissions and energy consumption behavior from vehicles is a key element for meeting air iquality and greenhouse gas (GHG) targets for any country. While CO2 fleet targets for vehicles are defined on basis of standardized test procedures, real
Konstantin Weller, Silke Lipp, Martin Röck, Claus Matzer, Andreas Bittermann, Stefan Hausberger   +5 more
doaj   +1 more source

Generalized Mechanism Model for Ecosystem Hysteresis

Advanced Science, EarlyView.
A simplified model examines ecosystem transitions into alternative states after disturbances by leveraging positive and negative feedbacks. It identifies critical tipping points and quantifies hysteresis. Tests conducted on lakes, grasslands, and pitcher‐plant leaves align closely with empirical data and enable the prediction of recovery trajectories ...
Yanbin Hao, Xin Wang, Jie Liu, Mingzi Wu, Jianqing Du, Kai Xue, Xiaoning Song, Xiaoyong Cui, Tong Zhao, Yanfen Wang   +9 more
wiley   +1 more source

Comprehensive optimisation of the economy and emissions of diesel engines: A full factorial design approach combining the Kriging method, NSGA III, and TOPSIS

Results in Engineering
This study proposes a multi-objective optimisation method using a full factorial design and Kriging- non-dominated sorting genetic algorithm (NSGA) III- technique for order preference by similarity to ideal solution (TOPSIS) to reduce fuel and urea ...
Shichen Yang, Mingjiang Yu, Mingding Wan, Zhengjiang Wang, Yuting Ma, Lizhong Shen, Guisheng Chen, Yuchen Xu   +7 more
doaj   +1 more source

Direct Recycling of Mixed‐Oxide Cathodes: Balancing Cost, Performance and Environmental Trade‐Offs

Advanced Science, EarlyView.
Direct regeneration routes for mixed‐oxide lithium‐ion battery cathodes are systematically compared using harmonized techno‐economic, electrochemical, and environmental metrics. Solid‐state, hydrothermal, molten salt, electrochemical, and chemical relithiation methods are benchmarked to identify performance, cost, and sustainability trade‐offs.
Evgenii Beletskii, Elizaveta Evshchik, Anna Shikhovtseva, Valery Kolmakov, Andrey Popov, Svetlana Eliseeva, Lyubov Shmygleva, Yurii K. Gun'ko, Valentin Romanovski   +8 more
wiley   +1 more source

Internal Combustion Engines [PDF]

, 2012
Internal combustion engines can fill the role of rotating a propeller or main rotor, being the baseline powerplant approach from the early days of powered flight. Cycle analyses for spark-ignition and compression-ignition piston engine variants are presented in this chapter. The rotary engine approach as a competitive alternative is discussed.
openaire   +2 more sources

Feline‐Inspired Robot Enabled by Combustion‐Driven Actuators for Agile Motion and High‐Payload Obstacle Traversal

Advanced Science, EarlyView.
Inspired by nature's competitive maneuvers, this study introduces a combustion‐driven soft actuator that powers a multi‐modal “Jump‐and‐Fly Catbot” (JFC). With millisecond response, high‐force output (over 70 times its weight) and precise control (error within 5%), the robot can jump, fly, hover, and escape from challenging environments, achieving ...
Hongkuan Ma, Yang Yang, Zhiguo He, Hongliang Ren, Pengcheng Jiao   +4 more
wiley   +1 more source

Systematically Engineering for Efficient Production of 3‐Methyl‐1‐Butanol in Escherichia coli

Advanced Science, EarlyView.
An integrated metabolic engineering strategy was established for high‐level 3‐methyl‐1‐butanol biosynthesis in Escherichia coli. Molecular dynamics‐guided semi‐rational engineering of dihydroxyacid dehydratase uncovered and relieved key catalytic bottlenecks, while adaptive laboratory evolution enhanced strain robustness.
Nanfei Geng, Hao Liu, Haolin Han, Meng Meng, Shaojie Wang, Tianwei Tan, Haijia Su   +6 more
wiley   +1 more source

The Working Cycle of the Motoring Internal Combustion Engine by a New Method with Cylinder Pressures as in Real Engine Operation [PDF]

, 2022
Radek Procházka, Aleš Dittrich, Stanislav Beroun, Tomáš Zvolský, Robert Voženílek   +4 more
openalex   +1 more source

Rapid Steam‐Assisted Temperature Swing Adsorption for Direct Air Capture Using a Rotary Adsorber

Advanced Science, EarlyView.
This study presents a direct air capture (DAC) device based on a steam‐regeneration rotary adsorber for high‐purity CO2. Testing of the prototype demonstrates its capability for continuous and stable carbon capture with the potential to achieve ton‐scale.
Junye Wu, Yunhao Chen, Kuihua Wang, Yingjie Huo, Yanlin Chen, Quanwen Pan, Tianshu Ge   +6 more
wiley   +1 more source

Visualisation Research into Fuel Spray Propagation

Communications, 2005
The results of research into a new construction of a diesel engine multi-hole injector are presented. The injector needle (RSN injector) performs a rotary/swinging movement.
Hubert Kuszewski, Kazimierz Lejda, Zygmunt Szlachta   +2 more
doaj   +1 more source