期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到6篇文章
< 1 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Nonlinear resonance of rotating solar-sail membrane under solar thermal and pressure excitations 认领 引用
1
作者 Jinduo Chen Aiming Shi +1 位作者 Earl H.Dowell Yang Pei 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第1期325-343,共19页
This study explores the nonlinear resonance of a rotating solar sail membrane exposed to time-varying solar thermal and solar radiation pressure.The sail membrane is modeled using a cantilever membrane,applying the vo... This study explores the nonlinear resonance of a rotating solar sail membrane exposed to time-varying solar thermal and solar radiation pressure.The sail membrane is modeled using a cantilever membrane,applying the von Kármán theory for membrane large deflection.The membrane’s nonlinear equation is derived by employing the Lagrange equation while accounting for excitations from solar thermal and radiation pressure.The equation is solved via the Rayleigh-Ritz method.The bifurcation diagram of membrane motion is applied to reveal membrane resonance responses under different solar sail rotating frequencies.The displacement time history,phase portrait,Poincarémap,frequency spectrum,and the largest Lyapunov exponent are used to study nonlinear vibrations that occur near resonance regions.The results indicate that time-varying thermal loading excites membrane motions with multiple natural frequencies by the parametric resonance mechanics,leading to the onset of membrane chaotic motion.The membrane’s primary resonance is stimulated in harmonic oscillation by the time-varying radiation pressure.The divergence instability caused by thermal excitation is also illustrated by comparing the membrane’s vibration amplitude with and without thermal excitation.The membrane’s nonlinear vibration characteristics vary significantly with solar illumination angles,the membrane’s thermal expansion coefficients,and structural damping. 展开更多
关键词 Solar-sail membrane resonance Thermal excitation Parametrically excited system Chaos
暂未订购 下载PDF
A comparison of cryptocurrency volatility-benchmarking new and mature asset classes 认领 引用
2
作者 Alessio Brini Jimmie Lenz 《Financial Innovation》 2024年第1期848-885,共38页
The paper analyzes the cryptocurrency ecosystem at both the aggregate and individual levels to understand the factors that impact future volatility.The study uses high-frequency panel data from 2020 to 2022 to examine... The paper analyzes the cryptocurrency ecosystem at both the aggregate and individual levels to understand the factors that impact future volatility.The study uses high-frequency panel data from 2020 to 2022 to examine the relationship between several market volatility drivers,such as daily leverage,signed volatility and jumps.Several known autoregressive model specifications are estimated over different market regimes,and results are compared to equity data as a reference benchmark of a more mature asset class.The panel estimations show that the positive market returns at the high-frequency level increase price volatility,contrary to what is expected from the classical financial literature.We attributed this effect to the price dynamics over the last year of the dataset(2022)by repeating the estimation on different time spans.Moreover,the positive signed volatility and negative daily leverage positively impact the cryptocurrencies’future volatility,unlike what emerges from the same study on a cross-section of stocks.This result signals a structural difference in a nascent cryptocurrency market that has to mature yet.Further individual-level analysis confirms the findings of the panel analysis and highlights that these effects are statistically significant and commonly shared among many components in the selected universe. 展开更多
关键词 Cryptocurrency Volatility Market regimes Leverage effect
暂未订购 下载PDF
Resilience of a high latitude Red Sea corals to extreme temperature 认领 引用 被引量：1
3
作者 Mohamed Zaki Moustafa Zaki Daniel Moustafa Mary Sue Moustafa 《Open Journal of Ecology》 2013年第3期242-253,共12页
Our research objective was to expand the very limited knowledgebase pertaining to the ecology of fringing coral reefs in the Gulf of Suez, Egypt. Specifically, determine dominant coral species and investigate why this... Our research objective was to expand the very limited knowledgebase pertaining to the ecology of fringing coral reefs in the Gulf of Suez, Egypt. Specifically, determine dominant coral species and investigate why this reef is capable of surviving at such a high-latitude and extreme harsh environment. Data collection included annual reef surveys, randomized quadrat sampling, five permanent video transects and in situ seawater temperature. Of the known Gulf of Suez 35 taxa, only six (Acropora humilis, A. microclados, A. hemprichii, Litophyton arboretum, Stylophora pistillata, Porites columna, and P. plantulata), compose 94% of the reef's coral cover. Coral dominance across species shifted drastically during the study period. However, the six coral dominance remained unchanged, while some decreased others increased. These six coral taxa regularly experience daily changes in seawater temperature and seasonal variations that exceed These extreme temperatures variation and the fact that only six coral taxa dominance remained unchanged, suggest that these corals may have developed a mechanism to cope with extreme seawater temperatures as evidenced by their continued growth and survival over the study period. We speculate that species dominance shift occurred largely as a result of a local oil spill rather than exposure to extreme temperatures. Further scrutiny of these species and the mechanisms by which they are able to thrive is recommended, as they hold the potential to benefit other coral communities as a resilient transplant species and model for understanding coral survivability in extreme environmental conditions. 展开更多
关键词 Red Sea Fringing Reef Gulf of Suez Coral Bleaching Temperature Tolerance Marginal Reef Thermal Limits Omponent Formatting Style Styling Insert
暂未订购 下载PDF
利用微流控技术应对COVID-19和其他肺部疾病的全球挑战 认领 引用 被引量：1
4
作者 Yuliang Xie Ryan Becker +2 位作者 Michael Scott Kayla Bean Tony Jun Huang 《Engineering》 SCIE EI CAS CSCD 2023年第5期17-20,I0001,共4页
1. Introduction Pulmonary diseases present one of the most severe threats to human society. Since late 2019, the coronavirus disease 2019(COVID-19) pandemic has significantly impacted the lifestyle, culture, and polit... 1. Introduction Pulmonary diseases present one of the most severe threats to human society. Since late 2019, the coronavirus disease 2019(COVID-19) pandemic has significantly impacted the lifestyle, culture, and politics of almost everyone in the world. COVID-19 causes severe pulmonary dysfunction, which is a major cause of mortality for those affected [1]. 展开更多
关键词 微流控技术 肺部疾病 全球挑战
暂未订购 下载PDF
Recent progress on acoustofluidic manipulation of cells and particles 认领 引用 被引量：1
5
作者 Zeyu Wang Jianping Xia +2 位作者 Ryan Garry David A.Weitz Xiangming Li 《National Science Open》 CSCD 2025年第2期183-204,共22页
Acoustofluidics,an interdisciplinary nexus of microfluidics and acoustics,is propelling the critical functionalities of manipulation,separation,and mixing within microscale environments.This integration leverages the ... Acoustofluidics,an interdisciplinary nexus of microfluidics and acoustics,is propelling the critical functionalities of manipulation,separation,and mixing within microscale environments.This integration leverages the accuracy of microfluidics with the manipulation capabilities of acoustics,thereby enhancing the vital sample processing steps and satisfying inquiries in experiments.To fulfill the requisites of practical application in clinical and research arenas,the evolution of acoustofluidics concentrates on accomplishing finer particle separation,instantaneous manipulation,and augmented integration capacity.Acoustofluidics has evolved into a sophisticated and versatile instrument for handling specimens and reactants,prompting a trend towards devices characterized by stable performance at elevated frequencies,programmable control,and seamless integration with auxiliary microfluidic systems.In this review,we present the latest advancements in the development of sophisticated acoustofluidic systems that enhance efficiency and enable precise modulation of performance across spatial and temporal scales,thereby extending their functionality and suitability for practical applications. 展开更多
关键词 acoustofluidics microfabrication acoustics microfluidics
Integrated chromatin and transcriptomic profiling of patient-derived colon cancer organoids identifies personalized drug targets to overcome oxaliplatin resistance 认领 引用 被引量：1
6
作者 Kuei-Ling Tung Kai-Yuan Chen +8 位作者 Marcos Negrete Tianyi Chen Alexias Safi Abed Alhalim Aljamal Lingyun Song Gregory E.Crawford Shengli Ding David S.Hsu Xiling Shen 《Genes & Diseases》 SCIE CSCD 2021年第2期203-214,共12页
Colorectal cancer is a leading cause of cancer deaths.Most colorectal cancer patients eventually develop chemoresistance to the current standard-of-care therapies.Here,we used patient-derived colorectal cancer organoi... Colorectal cancer is a leading cause of cancer deaths.Most colorectal cancer patients eventually develop chemoresistance to the current standard-of-care therapies.Here,we used patient-derived colorectal cancer organoids to demonstrate that resistant tumor cells undergo significant chromatin changes in response to oxaliplatin treatment.Integrated transcriptomic and chromatin accessibility analyses using ATAC-Seq and RNA-Seq identified a group of genes associated with significantly increased chromatin accessibility and upregulated gene expression.CRISPR/Cas9 silencing of fibroblast growth factor receptor 1(FGFR1)and oxytocin receptor(OXTR)helped overcome oxaliplatin resistance.Similarly,treatment with oxaliplatin in combination with an FGFR1 inhibitor(PD166866)or an antagonist of OXTR(L-368,899)suppressed chemoresistant organoids.However,oxaliplatin treatment did not activate either FGFR1 or OXTR expression in another resistant organoid,suggesting that chromatin accessibility changes are patient-specific.The use of patient-derived cancer organoids in combination with transcriptomic and chromatin profiling may lead to precision treatments to overcome chemoresistance in colorectal cancer. 展开更多
关键词 Chromatin accessibility Drug screening Patient-derived organoids Personalized medicine Target discovery
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈