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学者姓名：黄樟钦
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Abstract ：
As a narrowband communication technology, Long Range (LoRa) contributes to the long development of Internet of Things (IoT) applications. The LoRa gateway plays an important role in the IoT transport layer, and security and efficiency are the key issues of current research. On the one hand, in the centralized working model of IoT systems built by traditional LoRa gateways, all the data generated and reported by end devices are processed and stored in cloud servers, which are susceptible to security issues such as data loss and data falsification. On the other hand, edge computing, as an innovative approach that brings data processing and storage closer to the endpoints, can create a decentralized security infrastructure for LoRa gateway systems, resulting in an edge intelligent IoT working model. Although this paradigm delivers unique features and improved quality of service (QoS), installing IoT applications at LoRa gateways with limited computing and memory capabilities presents considerable obstacles. To address this challenge, an edge intelligent LoRa gateway is designed and implemented in this paper. Firstly, we developed an edge intelligent LoRa gateway prototype on an FPGA-based embedded hardware system. Then, we proposed Latency-Aware Algorithm (LAA) can greatly improve the reliability of the network system by using a distributed edge computing network technology that can achieve maintenance operations such as detection, repair, and replacement of failures of edge nodes in the network. Finally, many experiments were conducted to evaluate the performance of the proposed edge-intelligent LoRa gateway. The results indicate that the proposed edge intelligent LoRa gateway is more effective in latency-aware in IoT applications, while greatly ensuring system availability and IoT network reliability.
Keyword ：
distributed computing distributed computing LoRa gateway LoRa gateway edge intelligent computing edge intelligent computing embedded system embedded system Internet of Things Internet of Things
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| GB/T 7714 | Zhang, Xiaobo , Huang, Zhangqin . A Design and Implementation of Decentralized Edge Intelligent LoRa Gateway [J]. | 2023 IEEE 26TH INTERNATIONAL SYMPOSIUM ON REAL-TIME DISTRIBUTED COMPUTING, ISORC , 2023 : 195-200 . |
| MLA | Zhang, Xiaobo 等. "A Design and Implementation of Decentralized Edge Intelligent LoRa Gateway" . | 2023 IEEE 26TH INTERNATIONAL SYMPOSIUM ON REAL-TIME DISTRIBUTED COMPUTING, ISORC (2023) : 195-200 . |
| APA | Zhang, Xiaobo , Huang, Zhangqin . A Design and Implementation of Decentralized Edge Intelligent LoRa Gateway . | 2023 IEEE 26TH INTERNATIONAL SYMPOSIUM ON REAL-TIME DISTRIBUTED COMPUTING, ISORC , 2023 , 195-200 . |
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Abstract ：
This work presents the deep learning networks-based method using fine-tuning for classification and search of a diversity of action videos. First, a 3D convolutional neural networks (3D CNN) model which performs pre-training operation and fine-tuning strategy is employed to extract the spatiotemporal features of videos. It is first pre-trained on UCF-101 datasets to train model with initial parameters. Then, a small new dataset is employed to fine-tune the initial model for the training of the new model. Once features are extracted by the final CNNs model, distance measure can be adopted to calculate the similarities between the query video and the test dataset for the video search. The searched video is returned and ranked according to the priority when it has higher similarity with the query video. The comparison results in the experiment shows that the search method using fine-tuning obtains better performance than the method without using fine-tuning. Second, the classification results based on the 3D CNN model using fine-tuning are also presented for the consideration of a query by keyword. Accuracy result obtained using the model with the help of fine-tuning is approximately 2.8% higher than that without using fine-tuning.
Keyword ：
Convolutional neural networks Convolutional neural networks video search video search feature extraction feature extraction fine-tuning fine-tuning
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| GB/T 7714 | Wang, Wenshi , Huang, Zhangqin , Tian, Rui . Deep Learning Networks-Based Action Videos Classification and Search [J]. | INTERNATIONAL JOURNAL OF PATTERN RECOGNITION AND ARTIFICIAL INTELLIGENCE , 2021 , 35 (07) . |
| MLA | Wang, Wenshi 等. "Deep Learning Networks-Based Action Videos Classification and Search" . | INTERNATIONAL JOURNAL OF PATTERN RECOGNITION AND ARTIFICIAL INTELLIGENCE 35 . 07 (2021) . |
| APA | Wang, Wenshi , Huang, Zhangqin , Tian, Rui . Deep Learning Networks-Based Action Videos Classification and Search . | INTERNATIONAL JOURNAL OF PATTERN RECOGNITION AND ARTIFICIAL INTELLIGENCE , 2021 , 35 (07) . |
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Abstract ：
To reduce DMA utilization for multiple algorithm IPs on FPGA, a channel configurable and multiplex DMA device (CMDMA) is proposed for asynchronous and heterogeneous algorithm IPs. Firstly, we abstract the entities and data-flow in CMDMA system with a formal description for function definition and work-flow analysis. Then based on the functions and work-flow, we design and implement a prototype of CMDMA, which includes CMDMA software driver (SW) and hardware circuits (HW) of one DMA IP, a configurable input switch (CISwitch), algorithm IPs, and an asynchronous output switch (AOSwitch). The configurable function of CMDMA is implemented by CISwitch through a configuration port in HW-level, and a configurable Round-Robin (CRR) algorithm is proposed to implement channel and input data schedule in SW-level. For output, a channel distinguishable output buffer (ChnDistBuf) is proposed, which is able to deliver channel ID and data size to SW earlier than the end time of an algorithm IP. With a double interrupt coordination method of both ChnDistBuf and algorithm IPs, CMDMA is able to successively store complete output data from different algorithm IPs. With a double interrupt coordination method of both ChnDistBuf and algorithm IPs, CMDMA is able to successively store complete output data from different algorithm IPs. The experiments based on 4 heterogeneous matrix multiplication algorithm IPs on Xilinx Zynq platform show that CMDMA is able to improve about 8% 29% average algorithm acceleration rates on single algorithm IP compared to the exclusive method that one DMA works for one algorithm IP only, and it is able to increase about 10-40 MB/s and 5-15 MB/s of DMA input and output data throughput with multiple algorithm IPs running in parallel. Moreover, the extended LUT and FF resources in CMDMA are 756 and 1219 , both of which are about 1% of Zynq platform. Besides, in a double CNN algorithm IPs test on Mnist application, an enhanced function of data broadcasting in CMDMA is able to improve 4 s than the system with 4 exclusive DMA running in parallel, meanwhile reduce 3 DMA utilization and 0. 03 W power consumption. (c) 2020 Elsevier B.V. All rights reserved.
Keyword ：
DMA DMA Switch Switch FPGA FPGA System architecture System architecture Multiplex Multiplex
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| GB/T 7714 | Huang, Zhangqin , Zhang, Shuo , Gao, Han et al. A configurable multiplex data transfer model for asynchronous and heterogeneous FPGA accelerators on single DMA device [J]. | MICROPROCESSORS AND MICROSYSTEMS , 2020 , 77 . |
| MLA | Huang, Zhangqin et al. "A configurable multiplex data transfer model for asynchronous and heterogeneous FPGA accelerators on single DMA device" . | MICROPROCESSORS AND MICROSYSTEMS 77 (2020) . |
| APA | Huang, Zhangqin , Zhang, Shuo , Gao, Han , Zhang, Xiaobo , Yang, Shengqi . A configurable multiplex data transfer model for asynchronous and heterogeneous FPGA accelerators on single DMA device . | MICROPROCESSORS AND MICROSYSTEMS , 2020 , 77 . |
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Abstract ：
RFID is one of the indispensable technologies employed to implement the Internet of Things, where it facilitates the identification and awareness of objects in our daily lives by integrating backscatter tags. The interference synthetic aperture radar (InSAR)-based localization scheme provides high precision in 3-D conditions, although it still has some practical problems such as its strict sampling operation and it is also highly time consuming. In this article, we developed E3DinSAR as an optimized InSAR-based 3-D localization approach for pinpointing tags rapidly and easily with high accuracy. E3DinSAR does not use any other infrastructure or reference tags, and only one movable reader with one antenna is sufficient to implement the localization method, where it measures the phase value of the tag at different positions throughout its movement in order to create multiple holographic images. In contrast to the previously proposed InSAR-based technique, we extend the sampling trajectory of the reader to an arbitrary curve by restricting it to several approximate linear apertures, which allows more flexible operations and increase the accuracy. We also employ a rapid computing method to calculate the results for the holographic images by estimating the direction of arrival for the tag. Experiments were performed where E3DinSAR was implemented with commercial off-the-shelf (COTS) RFID products and our systematic evaluation showed that E3DinSAR achieved a mean locating accuracy of 18.4 cm in a 3-D space.
Keyword ：
Radiofrequency identification Radiofrequency identification Three-dimensional displays Three-dimensional displays phase based phase based Two dimensional displays Two dimensional displays 3-D 3-D localization localization Apertures Apertures Trajectory Trajectory interference synthetic aperture radar (InSAR) interference synthetic aperture radar (InSAR) Antenna measurements Antenna measurements ultrahigh-frequency (UHF) RFID ultrahigh-frequency (UHF) RFID Phase measurement Phase measurement
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| GB/T 7714 | Liang, Xiaoxuan , Huang, Zhangqin , Yang, Shengqi et al. E3DinSAR: 3-D Localization of RFID-Tagged Objects Based on Interference Synthetic Apertures [J]. | IEEE INTERNET OF THINGS JOURNAL , 2020 , 7 (12) : 11656-11666 . |
| MLA | Liang, Xiaoxuan et al. "E3DinSAR: 3-D Localization of RFID-Tagged Objects Based on Interference Synthetic Apertures" . | IEEE INTERNET OF THINGS JOURNAL 7 . 12 (2020) : 11656-11666 . |
| APA | Liang, Xiaoxuan , Huang, Zhangqin , Yang, Shengqi , Qiu, Lanxin . E3DinSAR: 3-D Localization of RFID-Tagged Objects Based on Interference Synthetic Apertures . | IEEE INTERNET OF THINGS JOURNAL , 2020 , 7 (12) , 11656-11666 . |
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Abstract ：
针对视频拼接实现过程中图像配准阶段耗时较大的问题,设计出一种基于二进制鲁棒尺度不变性特征算法与运动统计算法的组合式图像配准算法。在二进制鲁棒尺度不变性特征算法快速特征提取特性的基础上,利用网格化方法对重叠区域图像进行划分,使特征点分布更加均匀,从而减少需要操作的特征点数量以提高速率;在匹配环节,利用运动统计算法剔除误匹配对,利用双向匹配策略提高匹配准确率。为使图像融合的更加自然流畅,设计出一种区域化的渐入渐出加权融合算法:为减少求解重叠区域存在的误差,构建融合区域并进行区域化划分,利用最佳缝合线法求得拼接缝,在不同区域使用渐入渐出加权算法实现图像融合,从而获取融合质量更高的全景图像。最后,设计...
Keyword ：
全景视频拼接 全景视频拼接 图像融合 图像融合 图像配准 图像配准
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| GB/T 7714 | 黄樟钦 , 母召 , 岑陈 et al. 一种多路视频的360度实时拼接技术 [J]. | 西安电子科技大学学报 , 2020 , 47 (02) : 1-8,31 . |
| MLA | 黄樟钦 et al. "一种多路视频的360度实时拼接技术" . | 西安电子科技大学学报 47 . 02 (2020) : 1-8,31 . |
| APA | 黄樟钦 , 母召 , 岑陈 , 高寒 . 一种多路视频的360度实时拼接技术 . | 西安电子科技大学学报 , 2020 , 47 (02) , 1-8,31 . |
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Aiming at the time-consuming problem of image registration in video mosaic, a combined algorithm based on the BRISK and GMS is designed and optimized. Based on the fast feature extraction feature of the BRISK, the grid image method is used to divide the overlap region image to make the feature point distribution more uniform, thus reducing the number of feature points that need to be operated. In the feature matching stage after feature extraction, the GMS is used to eliminate the mismatching pair, and improves the matching accuracy according to the two-way matching strategy. In order to make the image fusion more natural and smooth, this paper designs a regionalized feather blending weighted fusion algorithm. To reduce the error in solving the overlapping area, the fusion area is constructed and divided into regions. The best suture method is used to get the seam. The gradual in and out weighting algorithm is used in different regions to achieve image fusion, so as to obtain the panoramic image with higher fusion quality. Finally, a complete prototype of the panoramic video stitching system is designed. The feasibility and practicability of the system scheme are verified by experiments which show that, compared with the traditional video splicing technology, this algorithm ensures the real-time performance of video splicing while eliminating the ghosting and seaming problems that occur during splicing. © 2020, The Editorial Board of Journal of Xidian University. All right reserved.
Keyword ：
Extraction Extraction Feature extraction Feature extraction Image fusion Image fusion
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| GB/T 7714 | Huang, Zhangqin , Mu, Zhao , Cen, Chen et al. 360-degree real-time stitching technology for multi-channel video [J]. | Journal of Xidian University , 2020 , 47 (2) : 1-8 and 31 . |
| MLA | Huang, Zhangqin et al. "360-degree real-time stitching technology for multi-channel video" . | Journal of Xidian University 47 . 2 (2020) : 1-8 and 31 . |
| APA | Huang, Zhangqin , Mu, Zhao , Cen, Chen , Gao, Han . 360-degree real-time stitching technology for multi-channel video . | Journal of Xidian University , 2020 , 47 (2) , 1-8 and 31 . |
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Abstract ：
This paper mainly introduces the working principle of one type of electret generator in micro self-powered system. According to the characteristics of the micro generator, the fringe effect was introduced to verify the theoretical output power model of the electret generating device and analyze the micro capacitor in consideration of the actual output power under the condition of fringe effect. The theoretical model was simulated according to the actual output power and thus the output power model of self-powered micro electret generating device was concluded, considering the fringe effect. Boland Justin(BJ)model and fringe effects-Boland Justin(FE-BJ)model were compared and it was calculated by use of MATLAB simulation software that ignoring the fringe effect, width and spacing ratio of plate capacitor is less than 28.724 and the output power error of FE-BJ model is less than 10%. Under these circumstances FE-BJ model can simulate the output power of micro electret generating device. © 2019, Editorial Board of Journal of Tianjin University(Science and Technology). All right reserved.
Keyword ：
MATLAB MATLAB Electrets Electrets
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| GB/T 7714 | Yang, Shengqi , Ding, Meng , Huang, Zhangqin et al. Effect of Fringe Effect on Output Power of Micro-Vibration Electret Generator [J]. | Journal of Tianjin University Science and Technology , 2019 , 52 (3) : 293-299 . |
| MLA | Yang, Shengqi et al. "Effect of Fringe Effect on Output Power of Micro-Vibration Electret Generator" . | Journal of Tianjin University Science and Technology 52 . 3 (2019) : 293-299 . |
| APA | Yang, Shengqi , Ding, Meng , Huang, Zhangqin , Wang, Xiaoyi . Effect of Fringe Effect on Output Power of Micro-Vibration Electret Generator . | Journal of Tianjin University Science and Technology , 2019 , 52 (3) , 293-299 . |
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Abstract ：
Many indoor applications require spatial information about objects. Example applications include item finding, object level mapping and large-scale objects managing in warehouses or libraries. RFID technology enables the identification and location of objects in our daily life by integration of RFID tags. The RF signals that the tags backscatter include a lot of information about the environment of the objects which can be used to derive the objects' spatial information. In 2016, the demand for applications in the apparel industry alone exceeded 4.6 billion RFID labels. Due to the emergence of three-dimensional (3D) printing, Microsoft and Disney Research have attempted to incorporate RFID-like embedded encoding information directly into objects during the manufacturing process, which may allow objects to be uniquely identified and sensed in the future. To this end, how to additionally aware the precision spatial position of the tagged target is an important and pressing research topic. Traditional localization methods based on RF signals with backscatter tags can be classified into the following two types: (1) trilateration approaches that usually require multiple RFID readers placed in the environment, where the target position is determined by solving nonlinear equations based on the target-reader geometric relationship; and (2) scene analysis approaches that rely on the implementation of numerous tags with known positions as anchor nodes. However, both of these approaches have high implementation costs and it is difficult to apply them extensively in practice. In this paper, we propose a 3D localization scheme based on phase interferometric, named 3DinSAR. Our localization method does not need any reference tags and only one movable reader integrated with one antenna is required in order to construct the synthetic arrays to implement the locating system. The main idea is based on the 2D naive SAR localization. Rather than traversing all the spatial pixels which is time consuming and hence not efficient, we extend the naive hologram localization into a 3D scheme by using the spatial domain phase difference which relates to the wave path difference and the tags' height as additional information. Density-based spatial clustering method DBSCAN is used to give the final estimation target location to improve the accuracy. We also proposed an aperture-beam predicting method ABP to improve the real-time performance of 2D SAR method. In summary, the mainly contributions of this paper are: (1)We propose a 3D localization scheme based on phase interferometric for passive RFID system, named 3DinSAR, which is able to precisely estimate the tag's 3D location. (2)We further reduce the computational time required by using an aperture beam prediction (ABP) method, in order to improve the real-time performance. The main feature of the ABP method involves estimating the direction of arrival in order to ignore any unnecessary pixels when creating the holographic images. (3)Experiments are performed where 3DinSAR is implement with commercial off-the-shelf (COTS) RFID products. Comparing with naive 2D SAR method, the simulation results demonstrate ABP method has discount 99.4% of the time consumption. The experimental results from an indoor office environment show a spatial median error of 24 cm with minimum error 6cm for 3DinSAR, and the detection time maintain within 95 ms. © 2019, Science Press. All right reserved.
Keyword ：
Nonlinear equations Nonlinear equations Industrial research Industrial research Radio frequency identification (RFID) Radio frequency identification (RFID) Location Location Synthetic aperture radar Synthetic aperture radar Commercial off-the-shelf Commercial off-the-shelf Holograms Holograms Backscattering Backscattering Pixels Pixels Interferometry Interferometry 3D printers 3D printers Antennas Antennas
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| GB/T 7714 | Qiu, Lan-Xin , Huang, Zhang-Qin , Li, Da . 3D Tag Location Aware Scheme Based on Phase Interferometric for RFID Applications [J]. | Chinese Journal of Computers , 2019 , 42 (11) : 2512-2525 . |
| MLA | Qiu, Lan-Xin et al. "3D Tag Location Aware Scheme Based on Phase Interferometric for RFID Applications" . | Chinese Journal of Computers 42 . 11 (2019) : 2512-2525 . |
| APA | Qiu, Lan-Xin , Huang, Zhang-Qin , Li, Da . 3D Tag Location Aware Scheme Based on Phase Interferometric for RFID Applications . | Chinese Journal of Computers , 2019 , 42 (11) , 2512-2525 . |
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Abstract ：
Field-programmable gate arrays (FPGAs) can efficiently implement custom applications via their embedded digital signal processor (DSP) slices, including binary multipliers. An increasing number of binary multipliers belonging to a DSP slice usually demonstrate that it has the capacity to process as many multiplication operations as possible in one clock cycle. In order to fully utilize the DSP resource, in this paper, we propose a novel DSP slice optimization method to achieve parallel multiplication on single DSP slice, namely PMSDS. First, the PMSDS splits multiplicators into two separate parts, i.e., valid bits and vacant bits, using a customized polynomial algebra method. Then, the PMSDS pre-calculates the maximum number of overflow bits combining the above-mentioned polynomial algebra method. Finally, it computes the total multiplicators' bit numbers and parallel the final multiplicators. We also propose an optimization model to find the best parallel solution according to the performance and precision of a single DSP slice. Moreover, we implement a PMSDS-based matrix multiplication algorithm supporting the computing precision dynamically changing. The experiments based on a large-scale and real-world matrix multiplication show that the PMSDS has better performance in latency and resource utilization than the traditional, add-tree, and full-unroll methods and is more outstanding in frequency and dynamic power consumption comparing with the state-of-the-art methods.
Keyword ：
DSP slice DSP slice performance optimization performance optimization compute resource compute resource FPGAs FPGAs multiplication multiplication
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| GB/T 7714 | Huang, Zhangqin , Zhang, Shuo , Wang, Weidong . An Efficient Method of Parallel Multiplication on a Single DSP Slice for Embedded FPGAs [J]. | IEEE ACCESS , 2019 , 7 : 100993-101008 . |
| MLA | Huang, Zhangqin et al. "An Efficient Method of Parallel Multiplication on a Single DSP Slice for Embedded FPGAs" . | IEEE ACCESS 7 (2019) : 100993-101008 . |
| APA | Huang, Zhangqin , Zhang, Shuo , Wang, Weidong . An Efficient Method of Parallel Multiplication on a Single DSP Slice for Embedded FPGAs . | IEEE ACCESS , 2019 , 7 , 100993-101008 . |
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Abstract ：
本文主要介绍了微型自供电系统中的一种类型——驻极体发电机的工作原理,针对微型发电机的特点,引入了边缘效应,验证了驻极体发电装置的理论输出功率模型,分析验证了微型电容在考虑边缘效应情况下的实际输出功率,根据实际输出功率模拟得出理论模型,从而得出在考虑边缘效应的情况下,微型自供电驻极体发电装置的输出功率模型.并且将BJ模型与FE-BJ模型进行对比,通过MATLAB仿真软件得出忽略边缘效应时,平板电容的宽度与间距比小于28.724时,FE-BJ模型的输出功率误差在10%,以内,此时可用FE-BJ模型来模拟计算微型驻极体发电装置的输出功率.
Keyword ：
最佳模型 最佳模型 功率输出模型 功率输出模型 自供电系统 自供电系统 边缘效应 边缘效应
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| GB/T 7714 | 杨胜齐 , 丁梦 , 黄樟钦 et al. 边缘效应对微型振动式驻极体发电机输出功率的影响 [J]. | 天津大学学报(自然科学与工程技术版) , 2019 , 52 (03) : 293-299 . |
| MLA | 杨胜齐 et al. "边缘效应对微型振动式驻极体发电机输出功率的影响" . | 天津大学学报(自然科学与工程技术版) 52 . 03 (2019) : 293-299 . |
| APA | 杨胜齐 , 丁梦 , 黄樟钦 , 王晓懿 . 边缘效应对微型振动式驻极体发电机输出功率的影响 . | 天津大学学报(自然科学与工程技术版) , 2019 , 52 (03) , 293-299 . |
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