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2022 5th International Conference on Circuits, Systems and Simulation (ICCSS)最新文献

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Liquid Crystal Display Device with Tunable Surface Wettability Alignment Layer of ZnO Using Magnetron Sputtering 基于磁控溅射的ZnO表面润湿性可调取向层液晶显示装置
Pub Date : 2022-05-13 DOI: 10.1109/iccss55260.2022.9802310
Zhen Long, Qing Li, Xianyu Zhao, Yujian Shi, Siming Li, Renli Sun
Inorganic alignment technology has gradually become a research focus of Liquid Crystal (LC) alignment. In this paper, Zinc oxide (ZnO) inorganic films as an alternative alignment layer for liquid crystal displays were deposited at fixed oblique angles on Indium Tin Oxide (ITO) glass using magnetron sputtering. By controlling the wettability of the ZnO film through annealing, the alignment states of Liquid crystal molecules can be manipulated. The results showed that the transmittance of the specially treated ZnO film substrate met the need of LCD panels in the visible light band. The LCD cells fabricated using ZnO-based substrates have the similar transmittance-voltage curves as the one with electronically controlled birefringent (ECB) mode based on mechanically rubbed polyimide, and that the ZnO-based LCD cell has a lower threshold voltage due to the slightly higher pretilt angle of the liquid crystal molecules. In addition, the ZnO-based liquid crystal cell has a nearly half faster response time than the PIbased cell.
无机取向技术已逐渐成为液晶取向领域的研究热点。本文采用磁控溅射技术,在氧化铟锡玻璃上以固定的斜角沉积氧化锌无机薄膜作为液晶显示器的替代排列层。通过退火控制ZnO薄膜的润湿性,可以控制液晶分子的排列状态。结果表明,经过特殊处理的ZnO薄膜基板在可见光波段的透光率满足LCD面板的要求。采用zno基基片制备的LCD电池具有与基于机械摩擦聚酰亚胺的电控双折射(ECB)模式的LCD电池相似的透射电压曲线,并且由于液晶分子的预倾角略高,zno基LCD电池具有较低的阈值电压。此外,基于zno的液晶电池的响应时间比基于pi的电池快近一半。
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引用次数: 1
TCAD Simulation Research of the Single Event Burnout and Hardening in Power LDMOS Transistors 大功率LDMOS晶体管单事件烧坏和硬化的TCAD仿真研究
Pub Date : 2022-05-13 DOI: 10.1109/iccss55260.2022.9802363
Yibo Lei, Jian Fang, Bo Zhang
In this paper, the Single-event burnout (SEB) triggering mechanism for LDMOS devices is numerically studied by using the 2D technology computer-aided design device simulator, simultaneously, a hardened LDMOS with an N-type doped plug inserting in the drain region is proposed for the first time. The SEB triggering mechanisms contain the amplification bipolar effect and following impact ionization in the high field region. By comparing the simulation results from conventional LDMOS and proposed NDP LDMOS, the carriers induced by heavy ion can be quickly absorbed to drain and source electrode through NDP layer, so that the proposed NDP LDMOS can achieve better SEB performance than conventional one. With a heavy ion having the linear energy transfer value of 0.2pC/$mu$m striking vertically, SEB threshold voltage obtained in conventional LDMOS and hardened NDP LDMOS is 197V and 291V, respectively.
本文利用二维技术计算机辅助设计器件模拟器对LDMOS器件的单事件烧坏(SEB)触发机制进行了数值研究,同时首次提出了在漏极区插入n型掺杂塞的硬化LDMOS器件。SEB触发机制包括放大双极效应和随后的高场冲击电离。对比传统LDMOS和NDP LDMOS的模拟结果,重离子诱导的载流子可以通过NDP层快速吸收到漏极和源极,因此NDP LDMOS具有比传统LDMOS更好的SEB性能。当线性能转移值为0.2pC/$mu$m的重离子垂直撞击时,常规LDMOS和硬化NDP LDMOS的SEB阈值电压分别为197V和291V。
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引用次数: 0
Hand Gesture Recognition System Using the Dynamic Vision Sensor 基于动态视觉传感器的手势识别系统
Pub Date : 2022-05-13 DOI: 10.1109/iccss55260.2022.9802196
Yu Hu, Ziteng Li, Xinpeng Li, Jianfeng Li, Xintong Yu, Xiaofan Chen, Lei Wang
With the rapid development of computer vision and artificial intelligence, human-computer interaction has become an inevitable part of people’s lives. Gestures can bring more natural, comfortable, and effective communication between people and machines. However, in some complex scenarios, such as rooms with looming lighting, the robustness and universality of hand gesture recognition based on traditional cameras are insufficient, and the supporting algorithms tend to underperform in real-time, especially for embedded devices. This article explores methods of implementing gesture recognition based on Dynamic Vision Sensor (DVS). We obtained frame data by event-based accumulation and time-based accumulation. Then we apply preprocessing techniques such as sub-time window and overlapping frame to achieve higher accuracy on hand gesture recognition with the DVS. In this paper, we built a DVS-based gesture recognition system with the advantages of efficient data preprocessing, low memory cost, low latency, and competitive recognition ability in interaction scenarios. The recognition accuracy reaches 94.6%.
随着计算机视觉和人工智能的飞速发展,人机交互已经成为人们生活中不可避免的一部分。手势可以在人与机器之间带来更自然、舒适、有效的交流。然而,在一些复杂的场景中,例如灯光隐现的房间,基于传统相机的手势识别的鲁棒性和通用性不足,并且支持算法在实时性上往往表现不佳,特别是在嵌入式设备上。本文探讨了基于动态视觉传感器(DVS)的手势识别实现方法。采用基于事件积累和基于时间积累的方法获取帧数据。然后,应用子时间窗和重叠帧等预处理技术,提高了分布式交换机的手势识别精度。在本文中,我们构建了一个基于dvs的手势识别系统,该系统具有数据预处理效率高、内存成本低、低延迟以及在交互场景下具有竞争力的识别能力等优点。识别准确率达到94.6%。
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引用次数: 1
TCAD Simulation of Single-Event Transient and Hardening in 700V LDMOS Transistors 700V LDMOS晶体管单事件瞬态和硬化的TCAD仿真
Pub Date : 2022-05-13 DOI: 10.1109/iccss55260.2022.9802359
Yibo Lei, Jian Fang, Bo Zhang
This paper presents single-event transient (SET) simulation results for 700V LDMOS, simultaneously, a hardened LDMOS with buried oxide in the drift region is proposed and the saturation characteristic of SET effect is discussed for the first time. Charge collection is used to reveal the response mechanism of SET. By comparing the simulation results from the conventional LDMOS and proposed hardened NiN-LDMOS, the NiN-LDMOS has a lower charge collection of the drain electrode and shorter transient response time. A corresponding comparison was also made according to the different positions of BOX. Results show that with a heavy ion having the linear energy transfer (LET) value of 0.8pC/μm striking vertically into 60μm, the pulse width of the SET signal can be reduced from 24ns of the conventional LDMOS to 4ns of the NiN-LDMOS. Therefore, the hardened NiN-LDMOS can achieve better SET performance than the conventional one under different LET values.
本文给出了700V LDMOS的单事件瞬态(SET)仿真结果,同时提出了一种在漂移区埋有氧化物的硬化LDMOS,并首次讨论了SET效应的饱和特性。电荷收集用于揭示SET的响应机制。通过对比传统LDMOS和强化后的ni -LDMOS的仿真结果,发现ni -LDMOS的漏极电荷收集量更低,瞬态响应时间更短。并根据BOX的不同位置进行了相应的比较。结果表明,当线性能量传递(LET)值为0.8pC/μm的重离子垂直撞击60μm时,SET信号的脉宽可由传统LDMOS的24ns减小到ni -LDMOS的4ns。因此,在不同LET值下,硬化后的ni - ldmos比传统的ni - ldmos具有更好的SET性能。
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引用次数: 0
An Efficient Accelerator with Winograd for Novel Convolutional Neural Networks 基于Winograd的新型卷积神经网络加速器
Pub Date : 2022-05-13 DOI: 10.1109/iccss55260.2022.9802420
Zhijian Lin, Meng Zhang, Dongpeng Weng, Fei Liu
In recent years, the current trend of Convolutional Neural Networks (CNNs) is toward lower computational cost to achieve lightweight. In lightweight convolutional neural networks, the depthwise separable convolution (DSC) is becoming the mainstream method. But in DSC, the pointwise convolution (PWC) with $1times 1$ filters still has abundant parameters and computation. In this paper, an more efficient convolution algorithm is proposed to replace PWC, named kernel shared group convolution (KSGC). KSGC is used to combine channel information, which can be seen as the same convolution kernel sliding on the channel. In addition, Winograd algorithm is used to mitigate the number of multiplications required by KSGC in this paper. A CNN accelerator using a novel processing element (PE) performs 1-D Winograd in KSGC was implemented on a Ultra96-V2 field-programmable gate array (FPGA).At 200MHz clock frequency, the accelerator achieved computational performance of 52. 7GOPS and performance-power ratio of 10.42GOPS/W.
近年来,卷积神经网络(cnn)的发展趋势是降低计算成本,实现轻量化。在轻量级卷积神经网络中,深度可分离卷积(DSC)正逐渐成为主流方法。但在DSC中,1 × 1滤波器的点向卷积(PWC)仍然具有丰富的参数和计算量。本文提出了一种更有效的卷积算法来代替PWC,称为核共享群卷积(kernel shared group convolution, KSGC)。KSGC用于合并信道信息,这可以看作是在信道上滑动的相同卷积核。此外,本文还使用Winograd算法来减少KSGC所需的乘法次数。在Ultra96-V2现场可编程门阵列(FPGA)上实现了一种使用新型处理元件(PE)在KSGC中执行一维Winograd的CNN加速器。在200MHz时钟频率下,加速器的计算性能达到52。7GOPS,性能功率比10.42GOPS/W。
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引用次数: 1
Vehicle Control System Based on Dynamic Traffic Gesture Recognition 基于动态交通手势识别的车辆控制系统
Pub Date : 2022-05-13 DOI: 10.1109/iccss55260.2022.9802138
Ying Miao, Enrui. Shi, Muyao Lei, Chen Sun, X. Shen, Yaqiong Liu
In view of the lack of information processing speed and road condition recognition ability suitable for complex road conditions in the current autonomous driving technology and to solve the problem of rapid and accurate dynamic recognition of “traffic police gestures” in the current unmanned driving technology, a real-time interactive vehicle control system combining hardware and software is designed in this paper. The car takes Arduino UNO micro-controller as the core, realizes one-way data transmission from the camera to the computer through RTSP. After being processed by gesture recognition model based on YOLOv5 network structure, the corresponding instructions are sent back to the car to control the car’s movement. Through the design and debugging, the information interaction between the camera, the computer and the car is completed. The car can move according to the designated traffic police gesture, which improves the degree of car automation and has certain significance to promote the further development of the auto automation industry.
针对当前自动驾驶技术中缺乏适合复杂路况的信息处理速度和路况识别能力,为解决当前无人驾驶技术中“交警手势”的快速准确动态识别问题,本文设计了一种软硬件相结合的实时交互车辆控制系统。小车以Arduino UNO微控制器为核心,通过RTSP实现从摄像头到计算机的单向数据传输。基于YOLOv5网络结构的手势识别模型进行处理后,将相应的指令发送回汽车,控制汽车的运动。通过设计和调试,完成了摄像头、计算机和汽车之间的信息交互。汽车可以按照指定的交警手势移动,提高了汽车自动化程度,对推动汽车自动化行业的进一步发展具有一定的意义。
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引用次数: 3
A Vertical Structured Solar-blind Ultraviolet Photodetector Based on the Carbon Nanodot/Graphene Heterojunction 基于碳纳米点/石墨烯异质结的垂直结构日盲紫外探测器
Pub Date : 2022-05-13 DOI: 10.1109/iccss55260.2022.9802226
Taihao Chen, Yong Fang, Chifeng Song, Keyang Zhang, Yifan Gao, Zikang Han, Zhiwei Zhao
The vertical structured heterojunction has been highlighted as a promising candidate for the solar-blind Ultraviolet (UV) Photodetector (PD) due to the control of its channel length and the strong electric field induced high carrier mobility. Meanwhile, Carbon Nanodots (CNDs) have drawn great attention to be playing an essential role in the active layer of the PD. However, CND based solar-blind UV PDs, independent from sophisticated manufacturing method and extreme process conditions, has yet to be well developed. Herein, for the very first time, a vertical structured CNDs/graphene heterojunction type solar-blind UV PD is introduced, in which the CNDs is used as the photosensitive layer and the graphene is used as the transparent electrode, implemented with a low-cost and low-complexity fabrication strategy of CNDs. The device exhibits extraordinary responsivity of19.11 mA/W, normalized detectivity of $4.60times 10^{10}$ Jones and on/off ratio of 342 at low bias voltage of -5V under the illumination of1.5 mW/cm2 by 254 nm wavelength. The results show that this work has unlocked the critical bottleneck of developing a solar-blind UV PD with higher non-solar-blind ultraviolet signals rejection ratio, higher responsivity, and detectivity, unveiling the potential for missile warning, flame detection, and other areas of interest.
垂直结构异质结由于其通道长度的控制和强电场诱导的高载流子迁移率而成为太阳盲紫外光电探测器(PD)的一个有前途的候选者。同时,碳纳米点(CNDs)在PD的活性层中起着重要的作用,引起了人们的广泛关注。然而,基于CND的太阳盲UV pd,不依赖于复杂的制造方法和极端的工艺条件,尚未得到很好的发展。本文首次介绍了一种垂直结构的CNDs/石墨烯异质结型太阳盲UV PD,其中CNDs用作光敏层,石墨烯用作透明电极,实现了低成本和低复杂性的CNDs制造策略。该器件在-5V的低偏置电压下,在1.5 mW/cm2的254 nm波长照射下,具有19.11 mA/W的高响应度,4.60 × 10^{10}$ Jones的归一化检出率和342的通断比。结果表明,这项工作已经解开了开发具有更高非太阳盲紫外线信号抑制比、更高响应性和探测性的太阳盲UV PD的关键瓶颈,揭示了导弹预警、火焰探测和其他感兴趣领域的潜力。
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引用次数: 0
Research on Information Convergence Processing and Transmission Method for Virtual Power Plant 虚拟电厂信息融合处理与传输方法研究
Pub Date : 2022-05-13 DOI: 10.1109/iccss55260.2022.9802247
Kun Shi, Jindou Yuan, Zhengjia Lu, Yunjie Xiao, Yihao Hao
Aiming at the high concurrency and delay insensitive services in VPP information interaction, such as the collection and reporting of basic load data, aiming at the problem that it excessively occupies the resources of power communication system. In this paper, a method of information convergence processing and transmission on VPP platform is proposed. Simulation results show that the proposed method can effectively remove the redundancy of packets and achieve better compression and transmission performance.
针对VPP信息交互中存在的基础负荷数据采集与上报等高并发、不敏感延迟的业务,过度占用电力通信系统资源的问题。提出了一种基于VPP平台的信息汇聚处理与传输方法。仿真结果表明,该方法可以有效地去除数据包的冗余,获得较好的压缩和传输性能。
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引用次数: 1
Design and Verification of Joint Simulation Prototype System of Operations and Communications 作战与通信联合仿真原型系统的设计与验证
Pub Date : 2022-05-13 DOI: 10.1109/iccss55260.2022.9802149
Huang Jingping, Li Xianlong, Zhang Yamiao, Ning Jianjian, Y. Shutao, Shui Li, Zhang Chong
Starting from the demand of communication combat effectiveness simulation research, this paper designs the architecture of joint simulation system on the basis of analyzing the structure and information interaction of joint simulation system, analyzes the data interaction problems in the process of joint simulation, such as combat simulation data acquisition, data transmission and combat simulation manual intervention, and develops network middleware as a data interaction solution based on the interface of combat simulation engine and socket technology. Through a simple case, the designed joint simulation prototype system is simulated and verified. The results show that it is feasible to use the joint simulation system architecture and data interaction solution proposed in this paper for joint simulation, and it can be used to solve complex simulation problems that can not be completed by a single simulation platform.
本文从通信作战效能仿真研究的需求出发,在分析联合仿真系统结构和信息交互的基础上,设计了联合仿真系统的体系结构,分析了联合仿真过程中作战仿真数据采集、数据传输和作战仿真人工干预等数据交互问题;并开发了基于战斗仿真引擎接口和socket技术的网络中间件作为数据交互解决方案。通过一个简单的实例,对所设计的联合仿真原型系统进行了仿真验证。结果表明,采用本文提出的联合仿真系统架构和数据交互方案进行联合仿真是可行的,可用于解决单一仿真平台无法完成的复杂仿真问题。
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引用次数: 0
期刊
2022 5th International Conference on Circuits, Systems and Simulation (ICCSS)
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