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2012 IEEE 12th International Conference on Computer and Information Technology, CIT 2012

作者： Zhao, Yueming Wang, Teng Ni, Xiaoyu Wang, Xin'an Xie, Zheng Key Lab. of Integrated Microsystems Science Engineering and Applications Peking University Shenzhen Graduate School Shenzhen China

ISBN: (纸本)9780769548586

With the development of manufacturing technology and increasing complexity of functionality, traditional IC design method has become difficult to meet the demands of limited time-to-market and researchers' interests have been concentrated on novel design methods such as high-level synthesis, in which operator design method is one of the most promising solutions. In this paper, ANTLR tool is applied to conduct the transformation from C language to high-level operator language, which is a key step in the operator design method. The transformation procedure is comprised of four parts, namely lexical analysis, syntax analysis, AST analysis, and template emission. With a variety of experiments of different grammatical features and sentence structures of C language, the proposed syntactic representation transformation has been proven comprehensive and successful based on the proper application of ANTLR tool. Furthermore, the proposed scheme provides a good guideline for the subsequent working flow of operator design method. © 2012 IEEE.

关键词： High level synthesis

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FPGA implementation and verification system of H.264/AVC encoder for HDTV applications

FPGA implementation and verification system of H.264/AVC enc...

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Computer science and Information engineering, CSIE 2012

作者： Wang, Teng Chen, Chih-Kuang Yang, Qi-Hua Wang, Xin-An Key Lab. of Integrated Microsystems Science and Engineering Applications Peking University Shenzhen Graduate School Shenzhen 518055 China

ISBN: (纸本)9783642302220

For huge systems like video processing, FPGA prototyping plays an important role before taping out. In this paper, a verification system for H.264/AVC encoders with FPGA prototyping is proposed and implemented. An H.264 encoder with baseline profile of Level 3.2 was carried out with a clock frequency of 200MHz on a Xilinx Virtex-6 FPGA connected with DDR3 memory, which could satisfy real-time encoding for HDTV applications (720P@60fps) with a PSNR around 34 db. The encoder was finally implemented with SMIC 65nm CMOS technology for silicon verification. © 2012 Springer-Verlag GmbH.

关键词： Field programmable gate arrays (FPGA)

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Semantic Classification Based Clothing Image Retrieval

Semantic Classification Based Clothing Image Retrieval

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International Conference on Audio, Language and Image Processing

作者： Zhiyuan Lu Ling Shen Yule Yuan Yong Zhao Key Lab of Integrated Microsystem Science and Engineering Applications Peking University Shenzhen Graduate School

ISBN: (纸本)9781467301732

Performance of content-based image retrieval technology used in clothing image retrieval cannot meet user's requirement due to the 'semantic gap' between low-level visual features and the richness of human semantics and it's time consuming to searching images in a growing number on the internet. In order to reduce the 'semantic gap' and improve the searching speed, this paper introduces a novel clothing image retrieval method based on color semantic classification. In this method, database images are classified into different categories with color semantic features and indexed by their visual features. In the retrieval process, images with the same semantic category are selected as candidates and further ranked by their visual features. The sematic information can also be used integrated with text information lab.led on the internet. Experimental results demonstrate our proposed method provides promising retrieval performance in less time than previous methods.

关键词： image retrieval Semantics content-based image retrieval Clothing Visualization Internets User needs

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A Novel Tone Reservation Scheme with Fast Convergence for PAPR Reduction in OFDM Systems

A Novel Tone Reservation Scheme with Fast Convergence for PA...

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Consumer Communications and Networking Conference, CCNC IEEE

作者： Y. Z. Jiao X. J. Liu X. A. Wang Key Lab of Integrated Microsystem Science & Engineering Applications A406 Shenzhen Graduate School of Peking University Shenzhen China

OFDM is facing great opportunities and challenges in current broadband communication era. These opportunities and challenges derive from the native advantages and disadvantages of OFDM technology respectively. Too high PAPR is one of the main problems that prevent OFDM from being used more generally in broadband systems. Many approaches such as clipping and filtering, coding, SLM, PTS, and tone reservation have been studied to reduce the peak magnitude of OFDM symbols. In these approaches, tone reservation is considered as one of the most promising methods because of no additional distortion, no side information, and low implementation cost. In this paper, a novel tone reservation scheme is presented. Its essential idea is that a subcarrier selected from all reserved subcarriers for PAPR reduction should have a phase close to one of phi, pi/2+phi, pi+phi and -pi/2+phi, at the peak location in time domain, where phi is the phase of the peak sample. This results in no complex multiplication and division in the novel scheme. In addition, the floating positions of such selected subcarriers in frequency domain are helpful to the convergence of the algorithm. The simulation results show that the scheme can provide good performance and fast convergence.

关键词： Convergence Peak to average power ratio OFDM Partial transmit sequences Time domain analysis Filtering Data engineering Signal design Wire Wireless LAN

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Reconfigurable operators: New configuration logic blocks for novel FPGA

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Journal of Information and Computational science 2014年第12期11卷 4153-4166页

作者： Yong, Shanshan Wang, Xin'an Xie, Zheng Cao, Ying Key Lab. of Integrated Micro-System Science and Engineering Applications Peking University Shenzhen Graduate School Shenzhen China

For current FPGA architectures, the fine-grain programmable blocks are the most flexible ones. However, they bring in massive configuration bits-stream and much performance loss. In this paper, we propose new configuration logic blocks for the latest FPGA, a collection of Reconfigurable Operators (ReOps). A ReOp is a basic block which can process multiple bits data with a specific function set. Considering the flexibility and regularity, we divide ReOps into seven groups, which are arithmetic ReOps, shift ReOps, bitwise logic ReOps, Multiplier ReOps, Register ReOps, Multiplexer ReOps and Memory ReOps. The function set of ReOps is roundness for the arbitrary ASIC (Application Specific integrated Circuit) design. To build the development environment for this novel FPGA, we employ a new hardware design language and hardware compiler. To compare the performance between our work and other current FPGAs, we use configuration time and circuit delay as our evaluation measurements. And our experimental results show that our architecture achieves a great reduction on configuration bits-stream and comparable delay compared with Virtex5 FPGA. © 2014 Binary Information Press

关键词： Field programmable gate arrays (FPGA)

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Entrepreneurial Knowledge and the Influence of Entrepreneurship Education on Students' Entrepreneurial AbilitiesEntrepreneurial Knowledge and the Influence of Entrepreneurship Education on Students' Entrepreneurial Abilities

Entrepreneurial Knowledge and the Influence of Entrepreneurs...

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The 9th International Conference on Management and Service science (MASS 2015)

作者： Changqing Lai Wenjing lv Yuning Jiang School of Economics and Management Tsinghua University Key Lab of Integrated Microsystem Science & Engineering Applications Shenzhen Graduate SchoolPeking University

This paper studies the influence of entrepreneurship education on students' entrepreneurial abil-ities from the perspective of social network. In four college students' entrepreneurship case stu-dies from one university,we adopted methodological triangulation and multiple methods to guar-antee the reliability and validity of the research. We proposed that courses and projects in entre-preneurship education formed social network among mentors,monitors,and students,in which knowledge could flow frequently. We then discussed the influence of projects pattern,mentor pattern,and monitors pattern on college students' entrepreneurial abilities respectively,by ana-lyzing the structure and ties of the social network. This research contributed to social network theory and entrepreneurship education both theoretically and practically.

关键词： Social Network Entrepreneurship Education Entrepreneurial Abilities Entrepreneurial Knowledge

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A novel reconfigurable operator based IC design methodology for multimedia processing

A novel reconfigurable operator based IC design methodology ...

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IEEE Region 10 International Conference TENCON

作者： Dai Peng Wang Xin'an Zhang Xing Key Lab of Integrated Microsystem Science & Engineering Applications Shenzhen Graduate School of Peking University Shenzhen P. R. China

Currently the DSP applications such as multimedia processing raise the demands to IC designers for more flexibility, higher performance and shorter time-to-market. To solve these problems, this paper proposed a novel reconfigurable operator based IC design methodology for multimedia applications. Four kinds of reconfigurable operators and their logic meanings are introduced in this paper as well as the design flow. An archetypal reconfigurable circuit with 4*4 reconfigurable computing operator, reALU, is implemented in our research using SMIC 0.18 um CMOS, achieving the performance 2.4 GOPS at 150 Mhz at 1.62 v. Several algorithms such as SAD and DCT are mapped into the array processor, which show the better performance than the traditional digital signal processors.

关键词： Design methodology Application specific integrated circuits Digital signal processing Time to market CMOS logic circuits Logic design Reconfigurable logic Signal processing algorithms Discrete cosine transforms Digital signal processors

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A multi-objective optimal water strategy using time series analysis and improved genetic algorithm

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Journal of Information and Computational science 2015年第6期12卷 2229-2239页

作者： Lai, Changqing Xu, Zhengchao Jiang, Yuning School of Economics and Management Tsinghua University Beijing China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan China Key Lab. of Integrated Microsystem Science & Engineering Applications Shenzhen Graduate School Peking University Beijing China

Time series analysis and genetic algorithm have a good application in many fields. In present paper, we utilized graph theory, and established a multi-objective optimal water distribution model according to current situation in China. Then, we utilized time series analysis to predict water supply and demand situation, and put forward an improved genetic algorithm solution for optimal water resources strategy. Furthermore, sensitivity and effectivity of the improved genetic algorithm is fit to resolve the model. This method can be extended to other various resources-distribution fields. Copyright © 2015 Binary Information Press.

关键词： Graph theory

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Algorithm of variable transition bandwidth FIR filters with weighted-least-square method

Algorithm of variable transition bandwidth FIR filters with ...

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2010 2nd International Conference on Computer engineering and Technology, ICCET 2010

作者： Ma, Zilong Li, Hui An, Huiyao Wang, Wei Quan, Jinguo Key Lab. of Integrated Microsystem Science and Eng. Shenzhen Graduate School PEKING University Shenzhen 518055 China Dept. of Electronics and Info. Eng. Huazhong University of Science and Technology Wuhan 430074 China Division of Information Engineering Shenzhen Graduate School Tsinghua University Shenzhen 518055 China

ISBN: (纸本)9781424463503

This paper deals with the design of variable bandwidth linear-phase FIR digital filters by weighted least square method. This proposed algorithm is constructed by a linear combination of fixed-coefficient linear-phase filters, of which the variable bandwidth characteristics are provided by an embedded tuning parameter. Using the weighted least square objective function, the optimal solution is obtained by solving a set of linear equation, which is an error function reflecting the difference between the desired variable bandwidth filter and the practical filter. The proposed algorithm can implement the variable digital filter efficiently by the familiar Farrow structure with only one variable spectral parameter that determines the bandwidth. Mathematics deduction and simulations show this algorithm is simple and effective in designing FIR variable digital filter with better performance than previous ones. © 2010 IEEE.

关键词： FIR filters

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Two-dimensional materials for future information technology: status and prospects

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science China(Information sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng LI Taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong DUAN Yuhan FENG Yu FU Jingshu GUO Pengwen GUO Yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia LI Qian LI Weisheng LI Lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU Yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-Ling REN Haowen SHU Litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... Department of Applied Physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China School of Integrated Circuits Beijing National Research Center for Information Science and Technology (BNRist)Tsinghua University School of Electronic Science and Engineering Nanjing University The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology Shaanxi Joint Key Laboratory of GrapheneSchool of MicroelectronicsXidian University Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education School of Physics and TechnologyWuhan University School of Integrated Circuits Huazhong University of Science and Technology Center for Nanochemistry (CNC) Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking University State Key Laboratory for Artificial Microstruct

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3D integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronic devices optoelectronic devices multi-functional integration

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