417 research outputs found
Historical information aware unequal error protection of scalable HEVC/H.265 streaming over free space optical channels
No full textFree space optical (FSO) systems are capable of supporting high data rates between fixed points in the context of flawless video communications. Layered video coding facilitates the creation of different-resolution subset layers for variablethroughput transmission scenarios. In this paper, we propose Historical information Aware Unequal Error Protection (HAUEP) for the scalable high efficiency video codec (SHVC) used for streaming over FSO channels. Specifically, the objective function (OF) of the current video frame is designed based on historical information of its dependent frames. By optimizing this OF, specific subset layers may be selected in conjunction with carefully selected forward error correction (FEC) coding rates, where the expected video distortion is minimized and the required bitrate is reduced under the constraint of a specific throughput. Our simulation results show that the proposed system outperforms the traditional equal error protection (EEP) scheme by about 4.5 dB of Eb=N0 at a peak signal-to-noise ratio (PSNR) of 33 dB. From a throughput-oriented perspective, HA-UEP is capable of reducing the throughput to about 30% compared to that of the EEP benchmarker, while achieving an Eb=N0 gain of 4.5 dB
Potts model clustering for discovering patterns of epigenetic marks
No full textStudy of epigenetics leads to understanding of the regulation of gene expression not caused by the changes in the underlying DNA sequences. This area of biological research has drawn much interest as large amounts of epigenetic data from numerous experiments were generated in recent past. In this thesis, we use the Potts model clustering method, which is based on statistical mechanics, to discover patterns in histone modification data. After a general overview of the epigenome and an introduction to common methods of clustering, we discuss why we need special cluster analysis methods for the data at hand. Then, we introduce our tool of choice, namely, the superparamagnetic Potts clustering method. We discuss the Potts model and the Swendsen-Wang method of Monte Carlo simulation, which avoids the usual slowing down experienced near phase transition. We apply Potts model clustering to histone modification data in highly conserved regions to discover the patterns of epigenetic marks and compare them with background reading. We also contrast the results from our method with that from usual Kmeans clustering approach. Finally, we discuss the biological significance of our computational results.Ph.D.Includes bibliographical referencesIncludes vitaby Junyi L
Analysis of transistor laser intra-cavity photon-assisted tunneling for direct voltage modulation
No full textHigh-speed optical interconnect made with semiconductor lasers is expected to play an important role in the upcoming age of big data. The technology of diode laser has been limited by its current modulation scheme in which the carrier recombination lifetime in the active region governs the ultimate speed of operation. The transistor laser, due to its enhanced carrier recombination in the bipolar junction transistor base region, is a promising candidate to replace the diode laser for high-speed optical transmitters. It was recently found that the transistor laser offers a unique voltage modulation scheme through photon-assisted tunneling at the base-collector junction, which could potentially reshape the device operation principles. This work reports the quantitative analysis of the transistor laser photon-assisted tunneling effect and its implications for future optoelectronic applications.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2018-12-01The student, Junyi Qiu, accepted the attached license on 2016-11-30 at 17:11.The student, Junyi Qiu, submitted this Thesis for approval on 2016-11-30 at 17:17.This Thesis was approved for publication on 2016-12-05 at 16:42.DSpace SAF Submission Ingestion Package generated from Vireo submission #10385 on 2017-02-28 at 14:42:36Made available in DSpace on 2017-03-01T17:01:48Z (GMT). No. of bitstreams: 2
QIU-THESIS-2016.pdf: 983735 bytes, checksum: 0bf599adaffa6d1d7f116487b61cd16f (MD5)
LICENSE.txt: 4206 bytes, checksum: 4273c29807ba7ee1de06eda3acce52fd (MD5)
Previous issue date: 2016-12-05Embargo set by: Seth Robbins for item 98714
Lift date: 2019-03-01T17:02:22Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98714
Lift date: 2019-03-01T17:03:32Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98714
Lift date: 2019-03-01T17:05:02Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 98714
Lift date: 2019-03-01T17:06:55Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemLimited Restriction Lifted for Item 98714 on 2019-03-02T10:15:14Z
ban dao ti zhong de ben zheng zhang cheng fan tie ci zuo yong
No full textM.Phil.Despite the various magnetic orders mediated by superexchange mechanism, the existence of a long range antiferromagnetic (AFM) coupling is unknown. In this thesis, we investigate the carrier free long range AFM coupling in four chalcopyrite systems CuInTe₂, CuGaTe₂, AgInTe₂ and AgGaTe₂. Based on DFT calculations, we discovered an intrinsic long range AFM coupling in V doped case. The AFM coupling is mainly due to the p - d coupling and electron redistribution along the interacting chains. The relatively small energy difference between p and d orbitals and the small energy difference between d orbitals of the dopants and that of stepping stone sites can enhance the stability of this AFM configuration. A multi-bands Hubbard model was proposed to provide fundamental understanding to the long range AFM coupling in chalcopyrite diluted magnetic semiconductors(DMS).儘管已知有多種基於超交換原理的磁序，關於長程的反鐵磁作用仍所知甚少。在本論文中我們將考察四個黃酮礦類體系中的無載流子長程反鐵磁作用。基於密度泛函理論，我們發現了釩摻雜條件下的無載流子長程反鐵磁作用。這種作用主要來源於p 和d 軌道的作用以及在此原子鏈上的電子再分佈。p 與d 軌道間以及雜質原子與中間"墊腳石"原子間相對較小的能量差可以幫助穩定反鐵磁構型。我們推導了一個多軌道Hubbard模型來加深對黃銅礦類磁半導體中的長程反鐵磁作用的理解。Gong, Weiyi = 半導體中的本征長程反鐵磁作用 / 龔唯奕.Thesis M.Phil. Chinese University of Hong Kong 2019.Includes bibliographical references (leaves 43-46).Abstracts also in Chinese.Title from PDF title page (viewed on 23, November, 2020).Gong, Weiyi = Ban dao ti zhong de ben zheng zhang cheng fan tie ci zuo yong / Gong Weiyi
Direct tunneling modulation and signal mixing of semiconductor lasers
No full textThe transistor laser invented by Feng and Holonyak is a unique device that bridges the gap between high-speed III-V compound semiconductor transistors and high-speed semiconductor lasers. In a highly integrated fashion, the transistor laser is capable of simultaneous transistor electrical operation and electron-to-photon conversion. The three-terminal transistor structure has the potential to overcome the diode laser’s modulation speed limit by further reducing the carrier recombination lifetime. In addition, a recently discovered tunneling mechanism inside the transistor laser device structure paves the way for ultrahigh-speed direct modulation of laser optical output. In this work, the operation of the transistor laser is reviewed and compared against the conventional diode laser; both current modulation and tunneling modulation of the transistor laser are formulated and analyzed, which leads to the demonstration of direct photonic signal mixing. This work establishes the fundamentals of the transistor laser device operation and presents the transistor laser as an integrated, multi-functional optoelectronic device.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-12-01The student, Junyi Qiu, accepted the attached license on 2019-12-03 at 15:30.The student, Junyi Qiu, submitted this Dissertation for approval on 2019-12-03 at 15:34.This Dissertation was approved for publication on 2019-12-04 at 10:09.DSpace SAF Submission Ingestion Package generated from Vireo submission #14674 on 2020-02-28 at 17:23:08Made available in DSpace on 2020-03-02T22:15:05Z (GMT). No. of bitstreams: 2
QIU-DISSERTATION-2019.pdf: 1911975 bytes, checksum: ce7f8b16155533a63d22d92872f582c0 (MD5)
LICENSE.txt: 4206 bytes, checksum: a09fec501f456f7da169fdbf714997dd (MD5)
Previous issue date: 2019-12-04Embargo set by: Seth Robbins for item 113908
Lift date: 2022-03-02T22:15:21Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemEmbargo set by: Seth Robbins for item 113908
Lift date: 2022-03-02T22:18:25Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 113908 on 2022-03-03T10:15:30Z
An overview of studies on transport and land use in Asia
No full textThis chapter provides an overview of Asian studies on transport and land use. The chapter consists of four sections. After the introduction, section 14.2 reviews empirical studies on the relationship between land use and transport. In particular, subsection 14.2.1 summarizes studies on the effects of transport on land use. This is followed by a review of transport effects on property prices in subsection 14.2.2. Then, section 14.3 reviews empirical studies of land use effects on transport, especially focusing on the built environment and travel behavior. Subsequently, section 14.4 reviews applications of integrated land use transportation models. Lastly, section 14.5 concludes our chapter
Zhu Xi's “Li”: “Living Li”or“Being Only But Inactive”:Tang Junyi and Mou Zongsan's Different Interpretations
No full text唐君毅依据朱熹言理气不离不杂,认为在朱熹那里,理贯而主乎生生之气之流行中,从而从形上学的层面把朱熹的理诠释为动态的"生生之理";从这一诠释出发,他不仅认为朱熹的"生生之理"是对于程颢言"生生之理"的继承和发展,而且进一步对朱熹的理气动静作了自圆其说的阐述。与此不同,牟宗三认为,朱熹的理是"只存有而不活动"之理,是对程颢视道体性体为"即活动即存有"者的根本转向。重要的是,唐君毅、牟宗三对于朱熹的理气动静的诠释,不同于冯友兰《中国哲学史》的诠释而有所创新,在现代朱子学研究上具有重要的地位。而且,他们的诠释相互对立,展现了朱熹学术的不同面向,并给予更多的进一步思考的空间。According to Zhu Xi's statement that Li and Qi are not separated or impure,Tang Junyi contended that,for Zhu Xi,Li is dominant in living Qi; thus,Zhu Xi's Li is interpreted as"living Li"on the metaphysical level. With this interpretation,Tang not only argued that Zhu Xi's "living Li"is the inheritance and development of Cheng Hao's,but also made further elaboration to defend Zhu Xi's Li and Qi and their activeness or inactiveness. Unlike Tang,Mou Zongsan maintained that Zhu Xi's Li is "being only but inactive",which is fundamentally different from Cheng Hao's being and activeness of Dao and Xing. Significantly,Tang's and Mou's different interpretations of Zhu Xi's Li and Qi and their activeness or inactiveness are different from Feng Yuolan's interpretation in his History of Philosophy in China. These different interpretations demonstrate the varied aspects of Zhu Xi scholarship and provide more room for further contemplation.教育部哲学社会科学重大课题攻关项目“百年朱子学研究精华集成”(12JZD007
The Gospel of Love by Tang Junyi and the conundrum of presenting it as a Chinese symposium
No full textThe Philosopher Tang Junyi is the writer of an understudied book entitled The Gospel of Love which displays his philosophy of love in the 1940s. Previous scholarship has often described this piece of work as a Chinese or a Confucian Symposium because of some resemblance with Plato's dialogue. However, the present paper challenges this reading and raises the issue what the reader does of a philosophical work when he considers it as a transcultural production or a book that fuses different intellectual traditions. By giving a peculiar attention to Tang's way of displaying his philosophy of love, I state that the Gospel of Love is "a Confucian book on love under multicultural garments." Though the book conveys elements from different traditions and merges them in a well-built philosophical tale, the author was not trying to produce global philosophy of love in dialogue with others: he was attempting to articulate a defense of the family in the context of the liberalization of unions and to foster a personal messianic agenda: love was just a gateway to selftransformation or self-transcendence
Diseminacija in reteritorializacija: Tang Junyi, Mou Zongsan in preporod sodobne konfucijanske filozofije
No full textConfucianism as a mode of life was brought to Taiwan as early as Chinese settlement. Regarding Confucian philosophy, however, it must be traced back to the founding of modern institutions. Even though the historical background of the Chinese diaspora after 1949 is rather complex, it seems possible to examine how it has contributed to the development of academic disciplines in Taiwan, especially with regard to Confucianism. The present paper investigates the corresponding contributions of two philosophers, Tang Junyi (1909–1978) and Mou Zongsan (1909–1995). Both are important scholars, who are indispensable for the development of contemporary intellectual history in Taiwan. In order to describe the creativity in their way of dealing with ruptures, of transforming the separation into the renovation of tradition, the author analyses their efforts in terms of geo-philosophy, through the lens of two concepts, dissemination and reterritorialization, that are borrowed from Jacques Derrida, Gilles Deleuze, and Felix Guattari.Konfucianizem kot način življenja je prišel na Tajvan skupaj s prvimi kitajskimi priseljenci. A konfucijanstvo kot filozofija se na Tajvanu pojavi šele v času oblikovanja modernih institucij. Četudi je zgodovinsko ozadje kitajske diaspore po letu 1949 precej kompleksno, je vendarle mogoče raziskati, na kakšen način je ta diaspora prispevala k oblikovanju tajvanskih akademskih disciplin in zlasti konfucijanske filozofije. Pričujoči članek raziskuje topogledni prispevek dveh filozofov, namreč Tang Junyija (1909–1978) in Mou Zongsana (1909–1995). Oba sta pomembna teoretika, ki sta igrala osrednjo vlogo v razvoju sodobne kitajske filozofije. Za boljše razumevanje njune ustvarjalnosti in njunih prizadevanj za premostitev kulturnih diskontinuitet ter transformiranja ločnic v preporod tradicije avtor njuna dela analizira skozi optiko konceptov, ki si ju je sposodil pri Jacquesu Derridaju, Gillesu Deleuzu in Felixu Guattariju, namreč konceptov diseminacije in reteritorializacije
- …
