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2008 4th IEEE International Conference on Circuits and systems for Communications, ICCSC

作者： Cho, Jongmin Huynh, Trong Anh Kim, Jinsang Cho, Won-Kyung Computer System Architecture and VLSI Design Laboratory Department of Electronics and Radio Engineering Kyung Hee University 1 Seocheon Kihung Yongin Kyungki 449-701 Korea Republic of

ISBN: (纸本)9781424417087

In this paper, we present a timing synchronization scheme of the next generation IEEE 802.11n wireless LAN standard which is based on MIMO-OFDM technique. The proposed timing synchronization method takes two steps which consist of two modified auto-correlators. For coarse timing synchronization, a sliding window differentiator is used after a conventional auto-correlation in order to avoid plateau problem. The conjugate symmetry property of L-LTS is used for fine timing synchronization. Since cross-correlation based methods are not required, the computational complexity and the number of multiplier can be reduced. In order to reduce the hardware complexity, we have used sign comparators (SC) instead of using multipliers. Based on simulation results, the proposed method outperforms a conventional method. The proposed scheme can be applied to IEEE 802.11n systems and can easily be expanded to frequency synchronization scheme. ©2008 IEEE.

关键词： Orthogonal frequency division multiplexing

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Trust-based core social graph convolution: An innovative framework for location recommendation

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Expert systems with Applications 2025年 285卷

作者： Tianyu Xie Yunliang Chen Yong Wu Ningning Cui Haofeng Chen Xuanyu Lu Xiaohui Huang Yuewei Wang Jianxin Li School of Computer Science China University of Geosciences Wuhan Hubei 430074 China Hardware and Artificial Intelligence Lab Institute of Computer Engineering Heidelberg University Heidelberg 69120 Germany School of Data Science and Artificial Intelligence Chang’an University Xi’an 710064 China System Design Institute of Hubei Aerospace Technology Academy Wuhan 430040 China Discipline of Business Systems and Operations School of Business and Law Edith Cowan University Australia

With the increasing popularity of location-based social networks (LBSNs), recommendation based on LBSNs has attracted wide attention in academic and industrial domains. Traditional recommendation systems face critical challenges in handling data sparsity and underutilized social trust. Existing traditional models particularly struggle to incorporate both trust-level differences and implicit relationships effectively within large-scale personalized recommendations. This limitation directly leads to aggravated data sparsity, further exacerbating cold-start scenarios and significantly reducing recommendation accuracy for long-tail items. Existing widely-adopted deep learning models, such as graph convolutional networks (GCNs), apply equal propagation weights to all neighbor nodes, which not only causes feature convergence between high-trust and ordinary users (over-smoothing) but also incurs substantial computational overhead. We propose the Trust-Based Core Graph Collaborative Filtering (TCGCF) framework, integrating trust-weighted core graph analysis with trust-constrained graph convolution. TCGCF captures both explicit and implicit trust relationships, enhances personalization, and mitigates over-smoothing. Our trust-weighted core graph analysis identifies influential users in information propagation, while the trust-constrained convolution scheme enables precise, differentiated information flow. Experiments on real-world datasets demonstrate that TCGCF improves recommendation accuracy and computational efficiency, outperforming existing models in precision, recall, and suitability for large-scale applications.

关键词： Collaborative filtering

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Strategies for driving and egress for the vehicle of a humanoid robot in the drc finals 2015

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Journal of Institute of Control, Robotics and systems 2016年第11期22卷 912-918页

作者： Dong, Hyun Ahn Ju, Seong Shin Jun, Youngbum Sohn, Kiwon Jang, Giho Oh, Paul Cho, Baek-Kyu Department of Mechanics and Design Kookmin University Korea Republic of School of Mechanical System Engineering Kookmin University Korea Republic of Howard R. Hughes College of Engineering University of Nevada Las Vegas United States Samuel I. Ward Department of Electrical and Computer Engineering University of Hartford West HartfordCT United States

This paper presents various strategies for humanoid vehicle driving and egress tasks. For driving, a tele-operating system that controls a robot based on a human operator's commands is built. In addition, an autonomous assistant module is developed for the operator. Normal position control can result in severe damage to robots when they egress from vehicles. To prevent this problem, another approach that mixes various joint control techniques is adopted in this study. Additionally, a footplate is newly designed and attached to the vehicle floor for the ground landing phase of the egress task. The attached plate enables the robot to step down onto the ground in a safe manner. For stable locomotion, a balance controller is designed for the humanoid. For the design of the controller, the robot is modeled using an inverted pendulum that consists of a spring and a damper. Then, a state feedback controller (with pole placement and a state observer) is built based on the simplified model. Many approaches that are presented in this paper were successfully applied to a full-sized humanoid, DRC-HUBO+, in the DARPA Robotics Challenge Finals, which were held in the United States in 2015.

关键词： Anthropomorphic robots

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Coding gabor features for multi-modal biometrics

Coding gabor features for multi-modal biometrics

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Chinese Conference on Pattern Recognition

作者： Shen, Linlin Ji, Zhen Li, Yuwen Bai, Li Shenzhen Key Laboratory of Embedded System Design School of Computer Science and Software Engineering Shenzhen University China Shenzhen Institute of Information Technology Shenzhen China School of Computer Science University of Nottingham United Kingdom

ISBN: (纸本)9781424472109

Although biometrics technology has progressed substantially, its performance is still to be improved for real applications. This paper aims to improve the accuracy of personal identification, when only single sample is registered as template, by integrating multiple hand-based biometrics. To make fusion much easier, the same feature, so called fusion code, and decision level fusion strategy are used. Two fusion cases, face & palmprint and FKP & palmprint were taken as examples to verify the effectiveness. Experimental results show that much better performance than single modal biometrics has been achieved. ©2010 IEEE.

关键词： Biometrics

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Effect of pretreatment of substrate on synthesized diamond films on Tungsten Carbide substrate by flame combustion

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Procedia Manufacturing 2017年 13卷 21-28页

作者： Takahashi, M. Kamiya, O. Pasang, T. Department of System Design Engineering Faculty of Engineering Science Akita University 1-1 Tegatagakuen-machi Akita 010-8502 Japan Mechanical Engineering School of Engineering Computer & Mathematical Science Auckland University of Technology 34 St Paul Street Auckland 1020 New Zealand

A flame combustion method enables the synthesis of diamond using acetylene-oxygen gas flame combustion in ambient air. Recently, tungsten carbide (WC) has been used as cutting tools in the machining industry. To obtain diamond films and to achieve good adhesion on the WC substrate, diamond films were synthesized by flame combustion method. However, synthesized diamond films delaminate as a result of thermal stress during cooling. In this study, as a pretreatment of the substrate to prevent the delamination, a chemical processing was performed. The WC substrate was pretreated by chemical etching to roughen the surface. The substrate was etched in an ultrasonic bath using Murakami's reagent. Another processing was performed using an acid solution of hydrogen peroxide, in order to remove cobalt from the substrate surface. The pretreatment periods were varied. Moreover, the effect of the pretreatment of the substrate on synthesized diamond films by flame combustion was investigated. © 2017 The Author(s)

关键词： Diamond films Flame combustion Pretreatment of substrate Tungsten carbide

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Signal and power integrity co-simulation for multi-layered system on package modules

Signal and power integrity co-simulation for multi-layered s...

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IEEE International Symposium on Electromagnetic Compatibility, EMC 2007

作者： Bharath, Krishna Engin, Ege Swaminathan, Madhavan Uriu, Kazuhide Yamada, Toru School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332-0250 United States EMC Design Group System Engineering Center Matsushita Electric Industrial Co. Ltd.

ISBN: (纸本)1424413508

The coupling of simultaneous switching noise (SSM) in mixed signal system on package modules is a critical signal and power integrity (SI/PI) problem. In the presence of split planes and apertures, SSN coupling occurs both horizontally as well as vertically across layers. Thus, to catch SI and PI problems at an early stage of design requires fast signal and power co-simulation methodologies. In this paper, we outline the multi-layer finite difference method and how the accuracy of the technique can be enhanced with models for fringe and gap effects. We then briefly describe a method for integrating the signal distribution network with the power distribution network to enable co-simulation. The method is then applied to a mixed signal board containing split planes, and numerical results are compared to full-wave simulations. © 2007 IEEE.

关键词： system-on-package

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A novel approach to modelling protein-protein interaction networks

A novel approach to modelling protein-protein interaction ne...

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3rd International Conference on Swarm Intelligence, ICSI 2012

作者： You, Zhuhong Lei, Yingke Ji, Zhen Zhu, Zexuan Shenzhen City Key Laboratory of Embedded System Design College of Computer Science and Software Engineering Shenzhen University Shenzhen 518060 China Department of Information Electronic Engineering Institute Hefei Anhui 230027 China

ISBN: (纸本)9783642310195

Finding an accurate network null model for protein-protein interactions (PPI) networks is an important and fundamental problem in today's systems biology. A number of graph models were introduced to model and analyze PPI networks. However, because the previous network models were developed to capture specific network properties or just mimic the way that real PPI network might have evolved, the whole connectivity information of PPI networks is not utilized to learn the topological structure of the networks. In this paper we propose a novel model for PPI networks which is based on geometric random graphs and employs the entire connectivity information of PPI networks to learn its structure. The computational experiments show the superiority of the fit of our method over five other network models to PPI data. Thus, the proposed network null model could facilitate further graph-based studies of protein-protein interactions and may help infer their hidden underlying biological knowledge. © 2012 Springer-Verlag.

关键词： Proteins

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The design of smart car based on android client 8

The design of smart car based on android client

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8th Annual International Conference on Geo-Spatial Knowledge and Intelligence, GSKI 2020

作者： Tang, Lili Huang, Wei Guo, Linhai Department of Computer and Information Engineering Zhixing College of Hubei University Wuhan430011 China The Fourth Laboratory System Design Institute of Hubei Aerospace Technology Academy Wuhan430011 China

This design is based on the open source Android version 8.0 system to develop the mobile phone platform client, using the eclipse integrated development environment to research and develop Bluetooth control. The remote control of the car is realized by Bluetooth technology, gravity sensor and voice. The design is mainly composed of hardware system and software system. It can realize the car's forward, backward, rear left turn, rear right turn, front left turn, front right turn and other functions. This design scheme provides a new solution for the design and implementation of wireless remote control vehicle, and also plays a certain reference role for the design of remote control smart home system in the future. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Remote control

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Cross-Domain Few-Shot Relation Extraction via Representation Learning and Domain Adaptation

arXiv

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arXiv 2022年

作者： Yuan, Zhongju Wang, Zhenkun Li, Genghui School of System Design and Intelligent Manufacturing Department of Computer Science and Engineering

Few-shot relation extraction aims to recognize novel relations with few labeled sentences in each relation. Previous metric-based few-shot relation extraction algorithms identify relationships by comparing the prototypes generated by the few labeled sentences embedding with the embeddings of the query sentences using a trained metric function. However, as these domains always have considerable differences from those in the training dataset, the generalization ability of these approaches on unseen relations in many domains is limited. Since the prototype is necessary for obtaining relationships between entities in the latent space, we suggest learning more interpretable and efficient prototypes from prior knowledge and the intrinsic semantics of relations to extract new relations in various domains more effectively. By exploring the relationships between relations using prior information, we effectively improve the prototype representation of relations. By using contrastive learning to make the classification margins between sentence embedding more distinct, the prototype’s geometric interpretability is enhanced. Additionally, utilizing a transfer learning approach for the cross-domain problem allows the generation process of the prototype to account for the gap between other domains, making the prototype more robust and enabling the better extraction of associations across multiple domains. The experiment results on the benchmark FewRel dataset demonstrate the advantages of the suggested method over some state-of-the-art approaches. © 2022, CC BY-NC-SA.

关键词： Embeddings

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SLRouting: Server link router state routing protocol design and implementation 15

SLRouting: Server link router state routing protocol design ...

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11th Asian Internet engineering Conference, AINTEC 2015

作者： Wijekoon, Janaka L. Nishi, Hiroaki Hiroaki Nishi Laboratory Dept. of Information and Computer Science Keio Univ. Yokohama Japan Dept. of System Design Engineering Keio Univ. Yokohama Japan

ISBN: (纸本)9781450339148

Packet propagation delay reduction is becoming the primary concern of the Internet. Internet service providers (ISPs) attempt to optimize packet routing to offer the best route to their subscribers by achieving desired network performance. Consequently, a route computation metric that uses packet propagation delay instead of link state will be a strong incentive for ISP routing optimization, in which case ISPs could ensure minimal delay route paths for their subscribers. To this end, we present SLRouting, a novel Interior Gateway Routing Protocol. SLRouting calculates a composite route metric using packet waiting delays of servers and routers as well as the packet propagation delay of network links. SLRouting computes the route matrix by selecting the minimal delay path for destination networks. This paper presents the first version of the SLRouting including its theory, design, and implementation notes. A prototype of the proposed protocol is implemented using the ns-3 simulator, and the results were used to evaluate the proposed protocol. © 2015 ACM.

关键词： Internet service providers

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