1,365 research outputs found
VCC-LF dataset
No full textThis is readme for VCC-LF dataset.
This dataset provides light field mat files that capture by Lytro I.
The light field resolusion is [h,w,u,v,d].
If you use these data or our toolkit code, please cite our paper properly
@inproceedings{ lirsiggraphasia2019,
title={Hierarchical and View-invariant Light Field Segmentation by Maximizing Entropy Rate on 4D Ray Graphs},
author={Li, Rui and Heidrich, Wolfgang},
booktitle={ACM Transactions on Graphics (Proc. SIGGRAPH Asia)},
year={2019},
publisher={ACM}
Hierarchical and View-invariant Light Field Segmentation by Maximizing Entropy Rate on 4D Ray Graphs (Supplement)
No full textThe supplementary material for paper "Rui Li, Wolfgang Heidrich, Hierarchical and View-invariant Light Field Segmentation by Maximizing Entropy Rate on 4D Ray Graphs. In SIGGRAPH Asia, 2019
RETRACTED: Experimental and Theoretical Investigation of Aerosol Optical Properties
No full textThis article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).This article has been retracted at the request of the Authors.It was prepared by Yan Li and Rui Xue, submitted by Yan Li, and published without the knowledge of the listed co-authors M.J. Ezell and B.J. Finlayson-Pitts. The experimental results are not interpretable as put forth in the published paper.The author Yan Li would like to apologize for the inconvenience caused to the co-authors and the readers
Single-component Li₂O solid electrolyte interphase on lithium : probing transport properties in battery environments
No full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2020Cataloged from student-submitted PDF of thesis.Includes bibliographical references (pages 59-63).Lithium (Li) anodes suffer numerous challenges arising from the chemically inhomogeneous nature of the native solid electrolyte interphase (SEI), which impedes smooth Li plating and leads to dendrite growth. In spite of much attention paid to engineering Li interfaces of late, there is still limited understanding of the desired chemical composition of an improved Li SEI. One major challenge has been a lack of empirical data on the structure-property-performance relations in individual SEI phases, and specifically those present at a metallic Li interface, where the chemical potential imposed by Li will yield different material properties than bulk analogues that are typically invoked to understand SEI behavior. Herein, we report preparation of single-component SEIs of lithium oxide (Li₂O) grown ex situ directly onto Li foils by controlled metal-gas reactions, generating 'deconstructed' model interfaces with nanoscale thickness (20-100 nm) similar to the native, yet more complex multiphasic SEI. The model Li/Li₂O electrodes serve as a platform for further chemical and electrochemical characterization. In particular, electrochemical impedance spectroscopy, combined with interface modeling, is used to extract transport properties (ionic conductivity, diffusivity, charge carrier concentration and activation energy barriers) of Li/Li₂O in symmetric cells with EC/DEC electrolyte. The Li₂O SEI is further studied as a function of synthesis condition, revealing microstructural sensitivities that can be tuned to modulate transport behaviors. Finally, results are compared with similarly deconstructed Li/LiF interfaces synthesized herein through an alternative metal-gas reaction, as well as with the native Li SEI, to isolate chemistry- and structure-specific differences.by Rui Guo.S.M.S.M. Massachusetts Institute of Technology, Department of Mechanical Engineerin
Wheel-rail dynamic interaction
No full textA better understanding of wheel-rail dynamic interaction is necessary for the capacity increase of railway transportation. This chapter briefly introduces the consequences, modeling and detection methods of wheel-rail dynamic interaction, and maintenance of the weak track spots where wheel-rail dynamic interaction often occurs. Wheel-rail dynamic interaction causes high-amplitude vibration and noise and accelerate structural degradation. Owing to the capabilities of handling nonlinear material properties and arbitrary contact geometries and considering dynamic effects, the explicit finite element approach is proposed to model wheel-rail dynamic interaction. Three numerical examples are presented to simulate wheel-rail impacts, frictional instability, and flange contact, respectively; and Rayleigh waves are observed in the simulation results. Wheel-rail dynamic interaction-related problems can be detected with the measurements of wheel-rail contact force, axle box acceleration, and track vibration. The weak track spots can be maintained by stiffness, geometric controls, and friction management.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Railway Engineerin
Core–Shell Sn–Ni–Cu-Alloy@Carbon Nanorods to Array as Three-Dimensional Anode by Nanoelectrodeposition for High-Performance Lithium Ion Batteries
No full textWe
report the synthesis of a novel three-dimensional anode based
on the core–shell Sn–Ni–Cu-alloy@carbon nanorods
which was fabricated by pulse nanoelectrodeposition. Li ion batteries
equipped with the three-dimensional anode demonstrated almost 100%
capacity retention over 400 cycles at 450 mA g–1 and excellent rate performance even up to 9000 mA g–1 for advanced Li-ion battery. Insight of the high performance can
be attributed to three key factors, Li–Sn alloys for Li-ion
storage, Ni–Cu matrix for the electronic conductive and nanorods
structure, and the carbon shell for the electronic/Li-ion conductive
and holding stable solid electrolyte interphase (SEI), because these
shells always kept stable volumes after extension of initial charge–discharge
cycles
Yi shen wei "dao": lun Li Rui, Yan Lianke, Jia Pingwa xin shi ji chang pian li shi xiao shuo zhong de zong jiao shu xie
No full textM.Phil.After the Cultural Revolution (1966-1976) on Mainland China, discussions on the relationship between Chinese literature and religion have flourished once again. Previous studies having mainly focused on writers who were at the same time religious believers, they mostly analyzed the intertextuality between the writers’ fictional writings and religious texts. These studies thus mainly tended to examine the religious attitudes of the writers. This study, on the other hand, proposes that religious writing in Chinese historical fiction since the Twentieth-first century has played an active role in investigating different social-political issues. These include those related to Chinese and foreign cultural interaction, political power and natural ecology. Moreover, religious themes enhance the subversive power of contemporary Chinese fiction and often become paths in seeking transcendental meaning in literary works. In other words, the study of the relationship between contemporary literature and religion should not be limited to the outlines of writers’ religious thought. How do contemporary Chinese writers choose and allocate religious resources in their works? How does contemporary Chinese fiction respond to different issues that have appeared in Chinese modernization from the perspective of religion? And how has religious writing influenced the Chinese language characteristics and narrative style of the works studied in this paper? All of these are important research questions.This dissertation, under the title of “Taking deities as a ‘way’,” suggests an interpretational approach to explore the relationship between contemporary Chinese literature and religion. It aims at examining three renowned Chinese novelists, namely Li Rui (1950- ), Yan Lianke (1958- ), and Jia Pingwa (1953- ), focusing on their Chinese historical fictions and religious writings published after the millennium. It also applies various cross-disciplinary theories to explore the variabilities of how these three novelists take religious resources as a way of enriching literary reflections on historical and social issues in the particular political context of Mainland China. Li Rui’s fiction entitled Zhang Martin's Eighth Day (2012) is a critique of religious ideology, pondering on how Chinese and foreign cultures can be treated equally through narrating the religious conflicts in the history of the Boxer Rebellion. Yan Lianke's Lenin's Kisses (2004) and Four Books (2011) depict various aspects of religious persecution in Chinese history. These novels reimagine and disenchant sacred characters, expressing a structure of political worship and capitalist religion in the present-day Chinese society. Jia Pingwa's Ancient Furnace (2011) emphasizes everyday life and mysterious natural ecology during the Cultural Revolution. These works highlight consciousness that resists, as well as the redemptive power of religion in living practice. By analyzing and exploring these writers’ religious writings, this dissertation demonstrates the multiple roles of religious culture in contemporary Chinese creative writings and attempts to be a breakthrough in the study of the multifold relations between contemporary Chinese literature and religion.一九八〇年代以降，有關中國文學和宗教關係的討論再度蓬勃。過去論者主要以信徒作家為研究對象，從文本互涉的角度分析小說與宗教文獻的連繫，藉此剖析作家的宗教情懷，鮮有關注宗教和小說其他議題的內在關聯。本文以為，文學中的宗教書寫讓作品能夠伸延至中外文化互動、政治權力和自然生態等不同社會議題，從而表現深刻的思考和批判。同時，宗教題材也增強了小說的顛覆性力量，並且成為小說追尋超越性意義的方法之一。換言之，當代文學與宗教關係的研究不應停留在勾勒作家宗教思想的層面上。作家如何選取和調配宗教資源，小說怎樣藉宗教回應中國現代化進程中的不同議題，以及宗教書寫對作品的語言特徵和敘事方式產生什麼影響，均是重要的研究方向。故此，本文提出「以神為『道』」的閱讀進路，集中分析當代作家李銳、閻連科和賈平凹在新世紀後發表之長篇歷史小說中的宗教書寫。本文將借用不同的跨領域宗教理論，探討三位作家如何取徑宗教資源，深化小說對中國歷史經驗和社會現實的反思。李銳的《張馬丁的第八天》（2012）透過義和團歷史中的宗教衝突，批判宗教意識形態，並借此探討中國與外來文化達至平等相待的方法；閻連科的《受活》（2004）和《四書》（2011）一方面再現當代中國歷史上的宗教迫害，另一方面小說塑造神聖化人物的同時又積極對「神人」去魅解惑，抨擊中國社會的政治崇拜和資本主義宗教；賈平凹的《古爐》（2011）則強調文化大革命的日常生活細節和神秘化自然生態，凸顯宗教生活實踐體現的抵抗意識和救贖力量。本文透過分析三位作家長篇歷史小說中的宗教書寫，展示宗教文化在當代文學中發揮的多元作用，為中國文學與宗教研究探索更多突破。張錦泉."2020年9月".Thesis M.Phil. Chinese University of Hong Kong 2020.Includes bibliographical references (leaves 213-231).Abstract also in English.Title from PDF title page (viewed on March 10, 2022).Zhang Jinquan
Zebrafish Ubc13 is required for Lys63-linked polyubiquitination and DNA damage tolerance
No full textUbiquitination is an important post-translational protein modification that functions in diverse cellular processes of all eukaryotic organisms. Conventional Lys48-linked poly-ubiquitination leads to the degradation of specific proteins through 26S proteasomes, while Lys63-linked polyubiquitination appears to regulate protein activities in a non-proteolytic manner. To date, Ubc13 is the only known ubiquitin-conjugating enzyme capable of poly-ubiquitinating target proteins via Lys63-linked chains, and this activity absolutely requires a Ubc variant (Uev or Mms2) as a co-factor. However, Lys63-linked poly-ubiquitination and error-free DNA damage tolerance in zebrafish are yet to be defined. Here, we report molecular cloning and functional characterization of two zebrafish ubc13 genes, ubc13a and ubc13b. Analysis of their genomic structure, nucleotide and protein sequence indicates that the two genes are highly conserved during evolution and derived from whole genome duplication. Zebrafish Ubc13 proteins are able to physically interact with yeast or human Mms2 and both zebrafish ubc13 genes are able to functionally complement the yeast ubc13 null mutant for spontaneous mutagenesis and sensitivity to DNA damaging agents. In addition, upon DNA damage, the expression of zebrafish ubc13a and ubc13b is induced during embryogenesis and zebrafish Ubc13 is associated with nuclear chromatin. These results suggest the involvement of Lys63-linked poly-ubiquitylation in DNA damage response in zebrafish
Novel Organic–Inorganic Hybrid Electrolyte to Enable LiFePO<sub>4</sub> Quasi-Solid-State Li-Ion Batteries Performed Highly around Room Temperature
No full textA novel
type of organic–inorganic hybrid polymer electrolytes with
high electrochemical performances around room temperature is formed
by hybrid of nanofillers, Y-type oligomer, polyoxyethylene and Li-salt
(PBA-Li), of which the Tg and Tm are significantly lowered by blended heterogeneous
polyethers and embedded nanofillers with benefit of the dipole modification
to achieve the high Li-ion migration due to more free-volume space.
The quasi-solid-state Li-ion batteries based on the LiFePO4/15PBA-Li/Li-metal cells present remarkable reversible capacities
(133 and 165 mAh g–1 @0.2 C at 30 and 45 °C,
respectively), good rate ability and stable cycle performance (141.9
mAh g–1 @0.2 C at 30 °C after 150 cycles)
- …
