Results 41 to 50 of about 4,609,539 (279)

Polarizable Vanadium Dipoles Promote Water Dissociation on Vanadium‐Based Metal Organic Framework

Advanced Functional Materials, EarlyView.
The polarization of unpaired V 3d electrons weakens the H─O bond to improve water dissociation by the dual Vδ+:O─H and Pλ−:H─O coupling hydrogen bonds formation and relaxation. P@V‐MOF electrocatalyst shows low overpotentials (94 mV in acid, 178 mV in neutral, and 77 mV in alkaline solutions) with excellent stability for effective overall water ...
Xinjuan Liu, Jun Xu, Minmin Fan, Jingcheng Xu, Mengyuan Li, Yun Gong, Weiwei Yang, Lei Li, Yong Zhou, Deqiang Zhao, Yuhua Xue, Xingtao Xu, Chang Q. Sun, Liming Dai   +13 more
wiley   +1 more source

Pattern transition in spacecraft formation flying using bifurcating potential field [PDF]

, 2012
Many new and exciting space mission concepts have developed around spacecraft formation flying, allowing for autonomous distributed systems that can be robust, scalable and flexible.
Derek J. Bennet, Colin R. McInnes, McInnes, Colin, Bennet, Derek James, Bennet, Derek J., McInnes, Colin R.   +5 more
core   +4 more sources

Safety Control for Satellite Formation Flying via High-Order Control Barrier Functions

Applied Sciences
In satellite formation flying, maintaining a predefined safety distance between the reference satellite and its accompanying satellites is critical to prevent collisions—a requirement that traditional control methods fail to satisfy.
Xu Zhang, Haiqiang Wang, Dongze Li, Zijie Ji   +3 more
doaj   +1 more source

Analytical Solution to Relative Motion Dynamics in Satellite Formation Flying Using Geostationary Orbit Sets [PDF]

فصلنامه علوم و فناوری فضایی, 2015
Satellite formation flying is one of the most recent research topics in space field owing to various operational projects. The first and the most important step in facing with this concept is studying and modeling of dynamics of the problem.
Seyed Hossein Mortazavi
doaj  

Dynamics, Deployment and Retrieval Strategy for Satellite-Sail Transverse Formation with Model Inaccuracy

Aerospace, 2022
One of the important applications of the space tethered system is formation flying. To satisfy the requirement for interferometry of ground targets by remote-sensing satellites, a new type of tethered solar sail spacecraft has been proposed in recent ...
Yini Zhong, Rui Zhong
doaj   +1 more source

Gradient‐Conductivity Architecture Enables Synchronous Enhancement of Sensitivity and Detection Range in Multifunctional All‐Paper Sensors

Advanced Functional Materials, EarlyView.
A gradient‐engineered all‐paper sensor is fabricated by integrating MXene and in situ grown AgNPs within hierarchical cellulose networks. The device breaks the sensitivity–detection range trade‐off through cascaded conductive pathways, enabling ultrahigh pressure sensitivity, humidity–pressure decoupled dual‐mode sensing, and outstanding EMI shielding,
Ao Li, Jun Xu, Dezhong Xu, Zhaohui Zhang, Jiyi Li, Daxian Cao, Kefu Chen, Mizi Fan   +7 more
wiley   +1 more source

Decentralized Differential Aerodynamic Control of Microsatellites Formation with Sunlight Reflectors

Aerospace, 2023
The paper presents a study of decentralized control for a satellite formation flying mission that uses differential lift and drag to enforce the relative positioning requirements.
Kirill Chernov, Uliana Monakhova, Yaroslav Mashtakov, Shamil Biktimirov, Dmitry Pritykin, Danil Ivanov   +5 more
doaj   +1 more source

Reconstructing Residual‐Solvent‐Involved Li+ Coordination in PVDF‐HFP Polymer Electrolytes for Stable Lithium Metal Batteries

Advanced Functional Materials, EarlyView.
2,2,2‐trifluoroethanamide‐mediated coordination regulation reconstructs the local Li+ environment in PVDF‐HFP polymer electrolytes by weakening residual DMF‐dominated coordination and promoting TFSI−‐involved anion‐rich solvation. This strategy facilitates Li+ migration and interfacial desolvation, promotes the formation of a thin inorganic‐rich SEI ...
Xiangsong Jiang, Qi Liu, Haohan Chen, Jianwei Lu, Yupeng Feng, Youwei Wang, Tianhao Zhao, Na Jiang, Wei Yang, Fei Li, Chunwei Dong, Shubiao Xia, Zhenzhen Shen, Weiwei Lei, Dan Liu, Jianping Long, Shimou Chen, Anjun Hu   +17 more
wiley   +1 more source

The TanDEM-X Mission Phases—Ten Years of Bistatic Acquisition and Formation Planning

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
TanDEM-X is a formation flying interferometer consisting of two SAR satellites. Together they acquire bistatic SAR data of the earth in order to generate a global digital elevation model as well as individual scientific interferometric datasets on user ...
Markus Bachmann, Thomas Kraus, Allan Bojarski, Maximilian Schandri, Johannes Boer, Thomas Busche, Jose-Luis Bueso Bello, Christo Grigorov, Ulrich Steinbrecher, Stefan Buckreuss, Gerhard Krieger, Manfred Zink   +11 more
doaj   +1 more source

An Integrated Oxygen‐Supplying Device and Predictive Multiphysics Model for Extended Ambient Transport of Insulin‐Producing Cells

Advanced Functional Materials, EarlyView.
Cell therapies typically rely on cold‐chain logistics and cryopreservation, limiting access and compromising cell quality. Here, a dual‐chamber device separates an oxygen‐supplying chamber from a hyaluronic acid cargo chamber, sustaining oxygen delivery for over 70 h and enabling ambient‐temperature shipment.
Daniel A. Domingo‐Lopez, Ruth Tarpey, Benjamin Brennan, Bryan D. Boyle, Amir M. Alsharabasy, Abhik Mallick, Gabriella Bellavia, Abhay Pandit, Garry P. Duffy, Ruth E. Levey   +9 more
wiley   +1 more source