19,116 research outputs found
Energy-efficient cooperative single-carrier frequency-division multiple-access
No full textA variety of cooperative relaying schemes are designed for the single-carrier frequency-division multiple-access (SC-FDMA) uplink, when communicating over broadband wireless channels. Our goal is to reduce the battery power dissipated both by transmission and signal processing, so that the overall energy-efficiency may be increased. We assume that there are a number of inactive mobile terminals acting as potential relays, which have either fixed or time-variant positions in a cell. Our investigations are focused on the optimum exploitation of all the resources, when considering relay selection, power allocation and channel-quality-aided adaptive subband allocation. We exploit the benefits of combining the path-loss reduction and diversity gains arising from both fixed and opportunistic relaying, user cooperation and from all the propagation paths, as well as from multiple antennas. Novel frequency-domain equalisation and diversity combining approaches are also conceived.Specifically, we firstly conceive two single-relay assisted topologies for the sake of exploiting the achievable cooperative diversity, namely the single-dedicated-relaying (SDR), where each relay is dedicated to a single user, and the single-shared-relaying (SSR), when a single relay assists multiple users. In order to eliminate both the multi-user interference and for the sake of mitigating the noise-amplification imposed by amplify-and-forward (AF) relaying, we propose an efficient subband-based AF scheme, which is benchmarked against the conventional AF regime in the context of both the SDR and SSR topologies. Furthermore, by assuming that the channel state information (CSI) is available at the base station (BS)’s receiver, a joint frequency-domain equalisation and diversity-combining scheme is proposed for the sake of increasing the achievable cooperative diversity gain. In this case, when considering the different number of available relays that are geographically dispersed across a large-scale environment subject to both path-loss and shadowing, we propose three different dynamic relay selection schemes, namely single-user relay selection (SU-RS), multi-user relay selection (MU-RS), and multiple-access relay selection (MA-RS), combined with source/relay vi power allocation in the context of opportunistic cooperation (OC) for the sake of increasing the multi-user system’s throughput. By contrast, when the source-to-destination (S-D) direct links are of low quality and hence are deemed to be unavailable, we exploit the relays which are roaming within each other’s vicinity in geographically localised manner in a cluster. Therefore, by assuming that these cooperating relays are capable of exchanging their channel quality information (CQI), we propose two first-hop-quality-aware (FHQA) joint dynamic resource allocation (DRA) schemes for opportunistic relaying (OR) based SCFDMA uplink, which beneficially combines channel-quality-aware subband allocation with efficient relay selection. The FHQA joint DRA schemes optimise the multi-user multi-relay networks relying on whether it is the source-to-relay (S-R) or the relay-to-destination (R-D) link, which dominates the attainable performance, when the BS’s receiver employs either single or multiple antennas. Additionally, the benefits of OR are quantified in the context of interleaver-aided decode-and-forward (DF) relaying for transmission over correlated fading channels. Therefore, the length of the interleavers combined with channel coding may be shortened. As a result, we benefit from a reduced interleaving delay and/or from a total transmit power reduction. In comparison to the benchmark schemes considered in the literature, the reliability and energy-efficiency of our proposed systems are significantly improved
A Diachronic Investigation on the Lexicalization of " X yi(以)" : A Case Study of "Jiayi(加以)" as an Example
No full text对汉语中“加以“代表的“X以“类构词,文章利用北京大学古汉语语料库进行历时研究,发现周秦时期的“加之以“有向“加以“演化的趋势,后接成分为名词;两汉时期“加之以“和“加以“基本并用,“加以“仍为独立的两个词;发展到六朝时期,“加以“一分为二:一类词化为连词,一类实现动介融合,“加之以“逐渐没落,“X以“的“给予“构式的源结构走向基本解体,“加以“已类似今天的形式动词,但“X以“类词的内部发展并不平衡。Based on a diachronic study on anceient Chiness corpus of beijing University,this paper takes"Jiayi(加以)" as an example to investigate the lexicalization of the construction of " X yi(以)" in anceint Chinese.It is elaimed that"Jiazhiyi(加之以)" when followed by components of nouns had the evolution trend to "Jiayi(加以)"in Zhou Qin era,while in Han Dynasty,"Jiazhiyi(加之以)" and "Jiayi(加以)" were used at the same time,"Jia"(加)and "yi(以)"were still two independent words;"Jiayi(加以)"divided into two in the Six Dynasties period: one was a conjunction,and the other was a kind of dynamic mediated fusion.Meanwhile,"Jiazhiyi(加之以)" declined gradually,the "GIVE" source structure of " X yi(以)" collapsed,and "Jiayi(加以)" was similar to today's form of functional verbs,but the internal development of " X yi(以)" words was not balance.
Energy-Efficient Channel-Dependent Cooperative Relaying for the Multiuser SC-FDMA Uplink
No full textHan shu shu Yi kao
No full text吳家怡."二零零九年八月"."2009 nian 8 yue".Thesis (M.Phil.)--Chinese University of Hong Kong, 2009.Includes bibliographical references (leaves 155-165).Abstracts in Chinese and English.Wu Jiayi.中文提要 --- p.I英文提要 --- p.II目錄 --- p.IV引言 --- p.1Chapter 第一章´Ø --- 《漢書》述《易》槪論 --- p.4Chapter 第一節´Ø --- 前人硏究述評 --- p.4Chapter 第二節´Ø --- 《漢書》引《易》方式 --- p.9Chapter 第三節´Ø --- 《漢書》的《易》學記載 --- p.24Chapter 第四節´Ø --- 《漢書》引《易》數據析述 --- p.35Chapter 第五節´Ø --- 小結 --- p.36Chapter 第二章´Ø --- 《史》、《漢》引《易》異同 --- p.37Chapter 第一節´Ø --- 《史》、《漢》對應篇章引《易》硏究 --- p.37Chapter 第二節´Ø --- 《史》、《漢》稱述相同《易》文義理探究 --- p.43Chapter 第三章´Ø --- 《漢書》「志」用《易》考 --- p.80Chapter 第一節´Ø --- 〈律曆志〉與象數《易》及卦氣說 --- p.80Chapter 第二節´Ø --- 〈五行志〉用京房《易》考 --- p.94Chapter 第三節´Ø --- 〈五行志〉稱引京房《易》文考 --- p.109Chapter 第四節´Ø --- 〈五行志〉用京房說相關史事重見〈本紀〉〈列傳〉比義 --- p.128Chapter 第五節´Ø --- 小結 --- p.135Chapter 第四章´Ø --- 《漢書》「傳」用《易》考 --- p.136Chapter 第一節´Ø --- 〈敘傳〉用《易》考 --- p.136Chapter 第二節´Ø --- 小結 --- p.151Chapter 第五章´Ø --- 總結 --- p.153參考書目 --- p.15
Dataset to support the article "High-resolution 𝜙-OFDR using phase unwrap and nonlinearity suppression"
No full textThis dataset is used for realizing high resolution of phase-sensitive Optical Frequency Domain Reflectometer. It is associated with the research paper:
Guo Z, Yan J, Han G, Yu Y, Greenwood D and Marco J (2023) "High-Resolution φ-OFDR Using Phase Unwrap and Nonlinearity Suppression". Journal of Lightwave Technology, 41 (9), 2885-2891. (https://doi.org/10.1109/JLT.2023.3236775).
The data is presented as an excel file:
High_resolution_OFDR_using_phase_unwrap_and_nonlinearity_suppression.xlsx
This work was funded by High Value Manufacturing Catapult and the Engineer and Physical Sciences Research Council - EPSRC EP/V000624/1. The author Gaoce Han would like to acknowledge the China Scholarship Council for sponsoring.</span
Han Suyin (Chinese author) speaking at Dallas Brookes Hall.
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/276390Han Suyin (Chinese author) speaking at Dallas Brookes Hall.200056
Item: [1999.0081.00439] "Han Suyin (Chinese author) speaking at Dallas Brookes Hall.
A Study on the mathematics textbooks in the era of the Great Han Empire
No full text이 글은 갑오경장(1894)과 경술 국치(1910) 사이에 간행된 산학(수학) 교재류의 목록을 확인하고, 각 텍스트의 출판과 관련된 사항, 소장처, 이본 등의 서지적 정보와 함께 이 시기 산학 교재류의 국어사 자료로서의 의의를 언어 사용 상의 측면에 초점을 두어 정리하는 것을 목적으로 한다. 이는 현대 한국어 태동기의 분과 학문의 도입 양상에 대한 연구의 일환인 한편, 학술 용어의 번역과 정착을 중심으로 이 시기의 한국어의 어휘 확장 양상을 확인하는 데에 필요한 기초 자료를 정리하는 작업의 한 부분이다. 본 연구에 앞선 산학(수학) 교재류에 대한 연구로는 산학 교재류의 서지 사항에 대해 기술한 강윤호(1973:187-199), 김봉희(1992:247-253), 한길준(2009), 오채환 외(2010) 등이 있고, 한국 수학사를 기술하면서 교재류를 함께 다룬 것으로 김용운·김용국(1982)와 이상구(2013)이 있다.This paper aims to make a whole list of the mathematics textbooks in the era of the Great Han Empire and summerize bibliographical data and linguistic characteristics in view of Korean history. In chapter 1, the author reviewed former studies which deals with the mathematics textbooks in the era of the Great Han Empire. In chapter 2, the author summerized bibliographical data of 45 volumes of 32 kinds textbooks. In chapter 3, the author described linguistic characteristics of the textbooks, especially focusing on writing systems, the use of Arabic numerals, horizontal writing, and presence of index or glossary
Also By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
Dataset to support the article "High Sensing Accuracy Realisation with Millimetre/sub-Millimetre Resolution in Optical Frequency Domain Reflectometer"
No full textThis dataset is used for realizing high sensing accuracy and sub-millimetre resolution of Optical Frequency Domain Reflectometer. It is associated with the research paper "High Sensing Accuracy Realisation with Millimetre sub-Millimetre Resolution in Optical Frequency Domain Reflectometer" in Journal: Journal of Lightwave Technology.
This work was funded by High Value Manufacturing Catapult, grant reference, 160080 CORE (WMG), titled ‘Smart Sensing for Future Batteries’ and the EPSRC (Engineering and Physical Sciences Research Council), grant reference EP/R004927/1, titled ‘Prosperity Partnership’. The author Gaoce Han would like to acknowledge the China Scholarship Council for sponsoring.</span
Corvèe under Han
No full textThe author distinguishes between the corvee systems of Ch'in and Han. In spite of the fact that the corvee system underwent a marked change in 167 B. C. in the reign of Emperor Wen of Former Han, the fact has been hitherto almost entirely overlooked. The author tries to reconstruct the Ch'in corvee system from various sources. In the sense that these two ancient empires were despotic in their constitution there was no essential difference between their system of government, but Han succeeded in melting feudalistic residues of the Chan-kuo period into her own system, while Ch'in failed in doing so due to the short period of her rule. Moreover, Ch'in failed in taking local differences into consideration in establishing her institutions. In the author's view the reign of Emperor Wen is significant in the sense that it represents renovation of the feudalistic taxation system and of the uniform and artificial system of local administration
- …
