Results 111 to 120 of about 1,252,315 (243)

Quaternion Orders

, 2007
這篇文章旨在介紹四元素代數裡的秩序。在第二節，我用非常初等的手法，推導出一些我們需要的四元素代數的基本性質；學過一年大學抽象代數並知道一點關於張量積的性質的人應該都能讀的懂。在第三節裡，我證明了秩序的一些性質並引出這篇文章的主角「艾克秩序」。第四節介紹佈於有理數上的秩序的特殊性質。第五節和第六節的目標在描述佈於代數數體上的艾克秩序。在第五節，佈於區域體上的艾克秩序被以清楚明白的式子寫出來。在第六節，我們收集區域的資訊用以瞭解全域體上的艾克秩序。最後，一些有理數上的艾克秩序被清楚地給出。The goal ...
孫嘉梁, Sun, Chia-Liang
core  

Ionic Transportation Induced Electric Field Modulation in Porous Ecoflex/PTFE with Confined Liquid for High‐Performance Contact Electrification Power Generation

Advanced Functional Materials, EarlyView.
Porous Ecoflex/PTFE composite with encapsulated liquid generates electricity through ionic migration induced by dynamic pore deformation, creating non‐uniform electric fields that drive charge induction on electrodes. This mechanism enhances charge transfer and ensures stable contact electrification performance, achieving 12 V and 4 nC with consistent ...
Xiangkun Bo, Juyang Wei, Zihua Li, Yuejiao Chen, Hong Fu, Bingang Xu   +5 more
wiley   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source

Constrained Quaternion Attitude Control of Satellites via \\Semi‑Definite Programming

Thesis (Master's)--University of Washington, 2025Spacecraft attitude control is critical for mission success in communication, navigation, and payload safety, requiring maneuvers that respect complex geometric and hardware constraints.
Kashyap, Shavy
core  

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

Advanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang, Zhewen Xu, Yuwen Xu, Björn Josteinsson, Simon Josephy, Dawei Zhang, Yunlong Sun, Heung‐Sik Park, Jihun Kim, Kanghyun Chu, Kyung Song, Danyang Wang, Chan‐Ho Yang, Andrea Morales, Jan Seidel   +14 more
wiley   +1 more source

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf, Hiba Shahulhameed, Bhabani Sankar Swain, Shengzhong (Frank) Liu, Adel Najar   +4 more
wiley   +1 more source

Hybrid Neural Network-Based PDR with Multi-Layer Heading Correction Across Smartphone Carrying Modes. [PDF]

Sensors (Basel)
Ye J, Ye A, Mansour A, Qiu S, Li Z, Qu X.   +5 more
europepmc   +1 more source

Quaternion algebras

, 2017
This thesis deals with quaternion algebras. A quaternion algebra is a four dimensional vector space with basis 1, i, j, k and multiplication defined as i2 = a, j2 = b, ij = -ji = k.
Bečka, Pavel
core  

Glissile Interphase Boundaries Enable Collective Phase Switching in Epitaxial Polar Oxides

Advanced Functional Materials, EarlyView.
A triple point is identified in the phase diagram of low‐symmetry epitaxial BiFeO3 thin film along with an extended regime of phase competition associated with a flattened energy landscape. The electromechanical response is shown to be governed by correlated interphase‐boundary motion, including scale‐free avalanche dynamics characteristic of systems ...
Mohammad Moein Seyfouri, Oliver Paull, Ralph Bulanadi, Yasuhiro Sakamoto, Shintaro Yasui, Mikayla Lord, Mahak Chhabra, David Walker, Patrycja Paruch, Shery Chang, Nagarajan Valanoor, Daniel Sando   +11 more
wiley   +1 more source

Robotic transesophageal echocardiography: system design and deep learning-based kinematic modeling. [PDF]

Front Robot AI
Sajadi SM, Tariverdi A, Brun H, Elle OJ, Mathiassen K.   +4 more
europepmc   +1 more source