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Tsinghua Science and Technology

Issue 1 • Date Feb. 2012

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Displaying Results 1 - 14 of 14
  • [Front cover]

    Publication Year: 2012, Page(s): c1
    IEEE is not the copyright holder of this material | PDF file iconPDF (1336 KB)
    Freely Available from IEEE
  • Contents

    Publication Year: 2012, Page(s): 1
    IEEE is not the copyright holder of this material | PDF file iconPDF (71 KB)
    Freely Available from IEEE
  • SPECIAL SECTION ON PEER-TO-PEER 
  • Rise and fall of the peer-to-peer empire

    Publication Year: 2012, Page(s):1 - 16
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (507 KB)

    The essence of the peer-to-peer design philosophy is to design protocols for end hosts, or “peers”, to work in collaboration to achieve a certain design objective, such as the sharing of a large file. From a theoretical perspective, it has been recognized that the peer-to-peer design paradigm resembles gossip protocols, and with appropriate algorithmic design, it maximizes the networ... View full abstract»

    Open Access
  • Uncover the peer distribution in BitTorrent

    Publication Year: 2012, Page(s):17 - 28
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (994 KB)

    Peer-to-peer traffic constitutes more than 60% of today's Internet traffic, resulting in high bandwidth cost for ISPs. Recent efforts have been made to modify BitTorrent clients to reduce inter-ISP traffic. Although the results have been encouraging, recent research also reveals that global adaptation of such an approach may harm the download time as there is no clear evidence of persistent cluste... View full abstract»

    Open Access
  • Strategies of collaboration in multi-swarm peer-to-peer content distribution

    Publication Year: 2012, Page(s):29 - 39
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (522 KB)

    In modern Peer-to-Peer (P2P) content distribution applications, multiple swarms typically exist, each corresponding to the dissemination of one content among interested peers. A common design in the existing P2P applications is to allow peers in one swarm to help each other, while different swarms are only coupled when sharing the upload bandwidth at the dedicated content servers/publishers. In re... View full abstract»

    Open Access
  • REGULAR ARTICLES 
  • A robust pedestrian detection approach based on shapelet feature and Haar detector ensembles

    Publication Year: 2012, Page(s):40 - 50
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (9325 KB)

    Detection of pedestrians in images and video sequences is important for many applications but is very challenging due to the various silhouettes of pedestrians and partial occlusions. This paper describes a two-stage robust pedestrian detection approach. The first stage uses a full body detector applied to a single image to generate pedestrian candidates. In the second stage, each pedestrian candi... View full abstract»

    Open Access
  • Video copy detection based on spatiotemporal fusion model

    Publication Year: 2012, Page(s):51 - 59
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (855 KB)

    Content-based video copy detection is an active research field due to the need for copyright protection and business intellectual property protection. This paper gives a probabilistic spatiotemporal fusion approach for video copy detection. This approach directly estimates the location of the copy segment with a probabilistic graphical model. The spatial and temporal consistency of the video copy ... View full abstract»

    Open Access
  • Fair and Bandwidth-efficient Broadcast link rate adaption in wireless LANs

    Publication Year: 2012, Page(s):60 - 66
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (761 KB)

    Broadcast delivery of bulk multimedia files is an important wireless LAN application for densely populated scenarios such as inside high-speed train carriages. However, it is a challenge to adapt the broadcast link rate due to heterogeneity and varying channel conditions of the broadcast receivers to achieve both high bandwidth efficiency and fairness. In this paper, the broadcast link rate adapti... View full abstract»

    Open Access
  • Attention-based adaptive intra refresh method for robust video coding

    Publication Year: 2012, Page(s):67 - 72
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1231 KB)

    Intra refresh is an efficient and simple technique for suppressing temporal error propagation in video transmission over error-prone networks. However, most existing intra refresh algorithms do not make good use of the visual perceptual mechanism of the Human Visual System (HVS). This paper presents an intra refresh algorithm based on an attention model and a loss impact model. Intra refresh rates... View full abstract»

    Open Access
  • Comparison of achievable rates of OFDM and single carrier communication systems

    Publication Year: 2012, Page(s):73 - 77
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (441 KB)

    This paper presents a theoretical comparison of a single carrier system and a multi-carrier system through an analysis of the achievable rate under frequency selective fading with channel state information at the receiver. A scheme was designed to compare the achievable rates of a single carrier system and an Orthogonal Frequency Division Multiplexing (OFDM) system. A thorough theoretical analysis... View full abstract»

    Open Access
  • Design of magnetic RF inductor in CMOS

    Publication Year: 2012, Page(s):78 - 83
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (4489 KB)

    Traditional planar inductors in Radio Frequency (RF) Integrated Circuits (ICs) are plagued by large areas, low quality, and low frequencies. This paper describes a magnetic-based CMOS-compatible RF inductor. Magnetic-core inductors with various ferrite-filled structures, spiral structures, and magnetic material permeabilities were simulated to show that this inductor greatly improves the inductanc... View full abstract»

    Open Access
  • Equivalent Pi-network model of lossy and dispersive coupled transmission lines

    Publication Year: 2012, Page(s):84 - 93
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2289 KB)

    An equivalent circuit representation is presented for a set of coupled transmission lines. An approximation of the hyperbolic secant function allows a simple derivation of a staged model that accounts for the complex frequency dependent parameters. The model converts the T-ladder network into a Π-network with controlled sources. The equivalent circuit based approach presented here is not on... View full abstract»

    Open Access
  • Laryngeal vibratory behavior in traditional Noh singing

    Publication Year: 2012, Page(s):94 - 103
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (951 KB)

    The phonation of Noh, a traditional Japanese style of singing, was investigated using electroglottographic and acoustical analyses. The dynamics of the laryngeal vibratory behaviors were analyzed for the singing voice of the Noh play compared with natural speech based on the Electroglottography (EGG) parameters, EGG waveform, spectrum, and spectrogram. The result shows that Noh singing is characte... View full abstract»

    Open Access
  • RMT-based urban traffic cross-correlation analysis and its application on traffic incident impact analyses

    Publication Year: 2012, Page(s):104 - 112
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1912 KB)

    Cross-correlating traffic flow data at different intersections in an urban transportation network is important for understanding the collective behavior of constituents in a complex system and for predicting the risk of network-wide congestion. In this work, a Random Matrix Theory (RMT) based method is used to describe the collective behavior from massive traffic data sets. Nonrandom correlations ... View full abstract»

    Open Access

Aims & Scope

Tsinghua Science and Technology (Tsinghua Sci Technol) aims to highlight scientific achievements in computer science, electronic engineering, and other IT fields. Contributions all over the world are welcome.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Professor Jiaguang Sun
School of Software
Tsinghua University
Beijing  100084 China
journal@tsinghua.edu.cn
Phone:86-10-62771385