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2008 IEEE International Conference on Robotics and Biomimetics, ROBIO 2008

作者： Chinapirom, Teerapat Witkowski, Ulf Rückert, Ulrich System and Circuit Technology Heinz Nixdorf Institute University of Paderborn Fuerstenallee 11 Paderborn33102 Germany

ISBN: (纸本)9781424426799

This paper describes a resource-efficient vision system for the mini-robot"Khepera". It is implemented to perform a fundamental approach of robotic navigation, which is obstacle detection by using an optical flow algorithm. This is inspired by visual perception of insects. The optical flow field is evaluated by implementing the sum of absolute differences (SAD) operation of block matching while the mobile mini-robot moves on texture plane. The SAD is realized in an additional processing module based on a Field Programmable Gate Array (FPGA) solution which can perform various tasks in parallel;for example, image processing, camera control and symbolic protocol transmission to the mini-robot. As a result, the Khepera equipped with 2D camera and the additional module is able to autonomously move avoiding collisions with obstacles, called ego-motion. The 30×16 SAD operation is processed by computing 16 pairs of pixels in each operation, which accomplishes the real-time approach. The proposed implementation reduces processing time and power consumption. © 2008 IEEE

关键词： Optical flows

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FPGA based speech processing for the Khepera robot

FPGA based speech processing for the Khepera robot

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4th International Symposium on Autonomous Minirobots for Research and Edutainment, AMiRE 2007

作者： El-Habbal, Mohamed Witkowski, Ulf Rueckert, Ulrich System and Circuit Technology Research Group Heinz Nixdorf Institute University of Paderborn 33102 Paderborn Germany

Although stochastic models of speech signals (e.g. hidden Markov models, trigrams, etc) have lead to impressive improvements in speech recognition accuracy, it has been noted that these models have little relationship to speech production, and their recognition performance on some important tasks is far from perfect. However, there have been recent attempts to bridge the gap between speech production and speech recognition using models that are stochastic and yet make more reasonable assumptions about the mechanisms underlying speech production. A new technique, which is given the name "Letter Identification", is developed for the Khepera robot application, mainly to control the movement of the robot's mobile base and suit all the application's constraints. The recognition technique, together with the necessary software and hardware implementation, are described in this paper.

关键词： Speech recognition

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CSD: Cell-based service discovery in large-scale robot networks

CSD: Cell-based service discovery in large-scale robot netwo...

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作者： Du, Jia Lei Witkowski, Ulf Rückert, Ulrich System and Circuit Technology Research Group Heinz Nixdorf Institute University of Paderborn 33102 Paderborn Germany

ISBN: (纸本)0780389123

If robots are deployed in large numbers in our environment in future, collaboration between the presumably specialized robots will be essential for a successful operation. The robots will set up mobile ad-hoc networks for communication and efficient routing and discovery protocols for such robot networks will provide the basic layer for a successful collaboration of the robots. In this paper we present a service discovery protocol that allows robots to efficiently discover available services in the network. It is specifically designed for large-scale robot networks. It takes into account the high dynamics of robot networks and exploits the position data of the robots to increase scalability and efficiency. A cellbased grid with master nodes in each cell forms the basic structure. Through proactive intra-cell communication and reactive inter-cell communication, scalability is ensured and the effects of node movements on the overall network are minimized. We implemented our solution in an example scenario. © 2005 IEEE.

关键词： Multipurpose robots

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245 GHz subharmonic receiver in SiGe

245 GHz subharmonic receiver in SiGe

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7th European Microwave Integrated circuits Conference, EuMIC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012

作者： Mao, Yanfei Schmalz, K. Borngraber, J. Scheytt, J.C. 15236 Germany System and Circuit Technology University Paderborn Fürstenallee 11 33102 Paderborn Germany

ISBN: (纸本)9782874870286

A subharmonic receiver for sensing applications in the 245 GHz ISM band has been proposed. The receiver consists of a single-ended common base LNA, a 60 GHz push-push VCO with 1/32 divider, a transconductance 4th subharmonic mixer and IF amplifier. The receiver is fabricated in f T/fmax=300/500 GHz SiGe: C BiCMOS technology. Its measured single-ended gain is 21 dB at 243 GHz with tuning range of 12 GHz, and the single-side band noise figure is 32 dB. The input 1-dB compression point is at -37 dBm. The receiver dissipates a power of 358 mW. © 2012 European Microwave Assoc.

关键词： Intermediate frequency amplifiers

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Piezoresistive and mechanics properties of nano polycrystalline silicon film materials

Piezoresistive and mechanics properties of nano polycrystall...

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2013 International Conference on Vehicle and Mechanical Engineering and Information technology, VMEIT 2013

作者： Lu, Xue Bin Cui, Lin Hai Huang, Hai Department of Integrate Circuit Design and Integrate System Harbin University of Science and Technology Harbin 150080 China

ISBN: (纸本)9783037858202

The polycrystalline silicon films with same doping concentration and different thickness were prepared by low pressure chemical vapor deposition. The gauge factors of the films samples were tested, the results show that the piezoresistive properties of nano polycrystalline silicon film (NPSF) exceed that of common polycrystalline silicon film (CPSF). To apply the NPSF to MEMS piezoresistive device effectively, the Young's modulus of the NPSF were tested by in-situ nano mechanical test system, the results show that the Young's modulus of the NPSF is about between 155GPa and 158GPa. It is very useful to investigate the piezoresistive and mechanics properties of NPSF, the results show that NPSF is a suitable material in MEMS piezoresistive device. © (2013) Trans Tech Publications, Switzerland.

关键词： Elastic moduli

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Implementation and optimization of A5-1 algorithm on Coarse-Grained Reconfigurable Cryptographic Logic Array 12

Implementation and optimization of A5-1 algorithm on Coarse-...

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2017 IEEE 12th International Conference on ASIC

作者： Min Liu YingJian Yan Wei Li Department of Microelectronics Zhengzhou Institute of Information Science and Technology STATE Key Laboratory of Fudan University Special Integrated Circuit and System

ISBN: (纸本)9781509066261;9781509066254

A5-1 algorithm is a stream cipher used to encrypt voice data in GSM,which needs to be realized with high performance due to real-time *** implementation on FPGA or ASIC can't obtain a trade-off among performance,cost and *** this aim,this paper introduces CGRCA to implement A5-1,and in order to optimize the performance and resource consumption,this paper proposes a resource-based path seeking(RPS) algorithm to develop an advanced *** results show that final optimal throughput of A5-1 implemented on CGRCA is 162.87 Mbps when the frequency is 162.87 MHz,and the set-up time is merely 87 cycles,which is optimal among similar works.

关键词： A5-1 CGRCA RPS adaptive algorithm throughput

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Study of Power-Delay Improved Logic circuit using Strained Silicon DG-JLT with Variable Gate Work Function

Study of Power-Delay Improved Logic Circuit using Strained S...

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2022 IEEE Region 10 Symposium, TENSYMP 2022

作者： Pokhrel, Tika Ram Majumder, Alak Electronics and Communication Engineering National Institute of Technology Arunachal Pradesh Integrated Circuit System Lab Jote India

ISBN: (数字)9781665466585

ISBN: (纸本)9781665466585

This paper presents a study of logic circuit design using Strained Induced Double Gated Junctionless transistors (SIDG-JLT) with work function engineering (WFE) in sub-20nm node for negligible Short Channel Effects (SCEs) based speed-power efficient application. The 2D designs of conventional Double Gated Junctionless transistors (DG-JLT), SIDG-JLT and SIDG-JLT with WFE have been carried out in Sentaurus TCAD at 14nm technology node and the needful simulation has been done at 0.8V supply voltage. Due to the mobility enhancement, the SIDG-JLT provides high saturation current (7.8%) as compared to the Conventional DG-JL T giving away a penalty in terms of large leakage (around 11.3x times), which has been managed by incorporating the WFE. After analyzing other parameters like Subthreshold Slope (SS), ION/IOFF ratio, Transconductance and threshold voltage roll-off, it was intended to validate the devices in the circuit level by designing an inverter and a ring oscillator. The SIDG-JL T with WFE based inverter has provided a better noise margin, lesser delay and sharper VTC curve. Similarly, its Ring oscillator configuration is noted to offer higher oscillating frequency, quick response time and smaller power consumption. © 2022 IEEE.

关键词： Computer circuits

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Voice Control system Based on Zynq FPGA 2

Voice Control System Based on Zynq FPGA

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2nd International Conference on Artificial Intelligence and Computer Science, AICS 2020

作者： Liu, Weili Integrated Circuit Design and Integration System Microelectronics Academy Dalian University of Technology Liaoning Province Dalian China

In this paper, a speech recognition system is designed and the relevant hard-ware environment is built through Zynq FPGA AX7020 platform. In this system, the feature extraction of speech signals is based on MFCC (mel-frequency cepstrum coefficients). The algorithm in this system includes Pre-emphasis, Framing and Windowing, FFT, MFCC Parameter Calculation, VED Endpoint Detection and DTW Operations processes commonly used in speech system design. In this paper, the speech recognition algorithm is implemented on Zynq FPGA platform and also simulated in Matlab. At the same time, audio module AN831 is adopted in the hardware part to realize the sound acquisition function. Through the comparison of experimental data, it is found that the average recognition rate in Matlab simulation is 86.67%, while in Zynq FPGA platform test, the recognition rate is 80.67%. Using Zynq FPGA AX7020 as a platform to realize speech recognition, the recognition rate is higher than the traditional speech recognition technology. © Published under licence by IOP Publishing Ltd.

关键词： Field programmable gate arrays (FPGA)

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Penalty-Free 400Gb/s 4λ WDM Transmission in NANF with Linear FFE Only Reaching 42dB Optical Budget for Mobile X-Haul

Penalty-Free 400Gb/s 4λ WDM Transmission in NANF with Linea...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Li, Chao Liu, Xumeng Sun, Peng Wang, Qibing Chen, Juan Wang, Lei Gao, Shoufei Wang, Yingying Ding, Wei Liu, Zichen He, Zhixue Yu, Shaohua Department of Circuit and System Pengcheng Laboratory Shenzhen China Institute of Photonics Technology Jinan University Guangzhou China

Supported by self-developed high-performance 1.4km NANF and linear equalizer, we achieved the penalty-free 400Gb/s 4λ WDM transmission for mobile X-Haul, reaching optical budget of 42.4dB and dynamic range and net da... 详细信息

ISBN: (纸本)9798350379266

关键词： Budget control

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Non-IID federated learning via random exchange of local feature maps for textile IIoT secure computing

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Science China(Information Sciences) 2022年第7期65卷 16-31页

作者： Bo PENG Mingmin CHI Chao LIU School of Computer Science Shanghai Key Laboratory of Data Science Fudan University Zhongshan Pool Net Technology Co.Ltd. Zhongshan Fudan Joint Innovation Center Zhengzhou Zhongke Institute of Integrated Circuit and System Application

With the fast development of artificial intelligence(AI) and industrial Internet of Things(IIoT)technologies, it is challenging to deal with the problems of data privacy protection and secure *** recent years, federated learning(FL) is proposed to attack the challenges of learning shared models collaboratively while protecting security based on the data from cross-domain clients. However, data in the real environment is usually not independent and identically distributed(Non-IID) due to the differences in business, working environments, and data acquisition, and thus classic federated methods suffer from significant performance degradation. In this paper, a novel federated framework is proposed for secure textile fiber identification(Fed TFI) via cross-domain texture representation based on high-definition fabric images. In addition to sharing the gradient of Fed TFI, the local patch of feature maps between crossdomain clients is randomly exchanged to build a richer image texture feature distribution while protecting data security simultaneously for secure computing. Furthermore, a texture embedding layer is designed to provide a joint representation through similarity measure between triplet samples in low-dimensional *** verify the effectiveness of the proposed framework, two textile image datasets, i.e., one public and the other we collected, are utilized to construct four Non-IID scenarios, including label skew, feature skew, and two combined skew scenarios. The experimental results confirm the effectiveness of our model to obtain better detection accuracies than benchmarks in four Non-IID scenarios by keeping data privacy for secure computing in fabric IIoT.

关键词： federated learning secure computing industrial Internet of Things (IIoT) machine vision texture encoding image classification Non-IID

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