检索结果-内蒙古大学图书馆

Fault-Tolerant Quantum Computation with Static Linear Optics

PRX Quantum 2021年第4期2卷 040353-040353页

作者： Ilan Tzitrin Takaya Matsuura Rafael N. Alexander Guillaume Dauphinais J. Eli Bourassa Krishna K. Sabapathy Nicolas C. Menicucci Ish Dhand Xanadu Toronto Ontario M5G 2C8 Canada Department of Physics University of Toronto Toronto Ontario M5S 1A7 Canada Department of Applied Physics Graduate School of Engineering The University of Tokyo 7–3–1 Hongo Bunkyo-ku Tokyo 113–8656 Japan Centre for Quantum Computation and Communication Technology School of Science RMIT University Melbourne VIC 3000 Australia Center for Quantum Information and Control University of New Mexico Albuquerque New Mexico 87131 USA

The scalability of photonic implementations of fault-tolerant quantum computing based on Gottesman-Kitaev-Preskill (GKP) qubits is injured by the requirements of inline squeezing and reconfigurability of the linear optical network. In this work we propose a topologically error-corrected architecture that does away with these elements at no cost—in fact, at an advantage—to state preparation overheads. Our computer consists of three modules: a two-dimensional (2D) array of probabilistic sources of GKP states; a depth-four circuit of static beam splitters, phase shifters, and short delay lines; and a 2D array of homodyne detectors. The symmetry of our proposed circuit allows us to combine the effects of finite squeezing and uniform photon loss within the noise model, resulting in more comprehensive threshold estimates. These jumps over both architectural and analytical hurdles considerably expedite the construction of a photonic quantum computer.

关键词： measurement-based quantum computing Optical quantum information processing Quantum computation Quantum information architectures & platforms Quantum information processing with continuous variables Topological quantum computing

来源：评论

学校读者我要写书评

暂无评论

Research on Data Integration technology of Large Power Grid Operation Mode for Unconventional Event Analysis

Research on Data Integration Technology of Large Power Grid ...

引用

IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Xuetao Yang Kaixin Liu Dunwen Song Weiwei Miao Facai Xing HaiCheng Tu Power System Department China Electric Power Research Institute(CEPRI) Beijing China Shandong Electric Power Dispatching and Control Center State Grid Shandong Electric Power Company Jinan China Power Grid Technology Center State Grid Shandong Electric Power Research Institute Jinan China School of Communication Engineering Hangzhou Dianzi University Hangzhou China

ISBN: (数字)9798331523527

ISBN: (纸本)9798331523534

The operating laws and characteristics of the new power system have undergone fundamental changes, and are intertwined with the impact of unconventional events such as natural disasters, resulting in a significant increase in safety risks. Firstly, based on the online analysis requirements of unconventional events, a data integration framework for the operation mode of the power grid was constructed, covering both online and offline data generation. Secondly, a standardized integration method for online data to simulation calculation data was proposed, which combines processes such as operational data parsing, topology correlation analysis, and flow convergence adjustment based on reactive power configuration. Finally, based on the characteristics of the impact of unconventional events, a predictive and clustered set of power grid faults is dynamically formed, providing basic data for the study of the evolution law of unconventional event modes. The multi-stage power grid operation mode data integration platform based on the above principles is of great significance for realizing the full cycle analysis of unconventional events and the application of emergency support technology.

关键词： Reactive power Correlation Disasters Data integration Energy Internet System integration Data collection Power grids Topology Load flow

来源：评论

学校读者我要写书评

暂无评论

Fast Intra Mode Prediction Algorithms for SCBS in VVC SCC

Fast Intra Mode Prediction Algorithms for SCBS in VVC SCC

引用

International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Dayong Wang Yishen Deng Weisheng Li Xin Lu Frederic Dufaux Bo Hang Ce Zhu Key Laboratory of Big Data Intelligent Computing Chongqing University of Posts and Telecommunications Guangxi Key Laboratory of Machine Vision and Intelligent Control Wuzhou University Chongqing Key Laboratory of Image Cognition Chongqing University of Posts and Telecommunications Faculty of Computing Engineering and Media (CEM) De Montfort University Université Paris-Saclay CNRS CentraleSupélec Laboratoire des Signaux et systèmes The Computer School Hubei University of Arts and Science School of Information and Communication Engineering University of Electronic Science and Technology of China

Versatile Video Coding (VVC) now supports Screen Content Coding (SCC) by integrating two efficient coding modes: Intra Block Copy (IBC) and Palette (PLT). However, the numerous modes and the Quad-Tree Plus Multi-Type Tree (QTMT) structure inherent to VVC contribute to a very high coding complexity. To effectively reduce the computational complexity of VVC SCC, we propose a fast Intra mode prediction algorithm for VVC SCC. More specifically, we first use the difference of minimum Sum of Absolute Transformed Differences (SATD) value of four Directional Modes (DMs) of Intra and the SATD value of the IBC-merge mode to determine whether to early skip Intra checking. Subsequently, we use a decision tree to determine whether to early terminate the checking after block differential pulse coded modulation (BDPCM). Finally, we employ a decision tree to determine whether to early skip multiple transform selection (MTS) and low frequency non-separable transform (LFNST) checking. The results demonstrate that our algorithm achieves an average encoding time reduction of 34.34% with a negligible Bjøntegaard delta bitrate increase of 0.46%.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Research of Active Disturbance Rejection controller Design for PMSM Servo System

引用

Journal of Physics: Conference Series 2021年第1期1894卷

作者： Yan Hongliang Li Jiapeng Li Leiming Ma Juju Shaanxi Key Laboratory of Oil and Gas Well Measurement and Control Technology Xi'an Shiyou University School of Electronic Engineering Xi'an Shiyou University Xi'an China

In the permanent magnet synchronous motor (PMSM) speed control system, an improved active disturbance rejection control strategy with higher tracking accuracy for time-varying input is proposed. The traditional active disturbance rejection controller is mainly used for fast and static-free tracking of step signals, but there is a large tracking error for time-varying signals, which limits the application of active disturbance rejection controller. In this paper, the theoretical analysis of the existence of steady-state error is carried out, and then an improved speed active disturbance rejection controller (ADRC) with derivative feedforward and parallel linear extended state observer(P-LESO) is designed to reduce the tracking error of the system. In order to observe and compensate the reverse electromotive force in real time and reduce the current following error, a current loop linear active disturbance rejection controller is designed. By constructing Simulink simulation model for verification, the control system not only improves the tracking accuracy of PMSM for time-varying input, but also has a good dynamic performance for step input.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Quantum gate identification: Error analysis, numerical results and optical experiment?

arXiv

引用

arXiv 2017年

作者： Wang, Yuanlong Yin, Qi Dong, Daoyi Qi, Bo Petersen, Ian R. Hou, Zhibo Yonezawa, Hidehiro Xiang, Guo-Yong School of Engineering and Information Technology University of New South Wales CanberraACT2600 Australia Centre for Quantum Computation and Communication Technology Australian Research Council CanberraACT2600 Australia Key Laboratory of Quantum Information University of Science and Technology of China CAS Hefei230026 China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei Anhui230026 China Key Laboratory of Systems and Control Academy of Mathematics and Systems Science CAS Beijing100190 China University of Chinese Academy of Sciences Beijing100049 China Research School of Engineering Australian National University CanberraACT0200 Australia

The identification of an unknown quantum gate is a significant issue in quantum technology. In this paper, we propose a quantum gate identification method within the framework of quantum process tomography. In this method, a series of pure states are inputted to the gate and then a fast state tomography on the output states is performed and the data are used to reconstruct the quantum gate. Our algorithm has computational complexity O(d3) with the system dimension d. The algorithm is compared with maximum likelihood estimation method for the running time, which shows the efficiency advantage of our method. An error upper bound is established for the identification algorithm and the robustness of the algorithm against the purity of input states is also tested. We perform quantum optical experiment on single-qubit Hadamard gate to verify the effectiveness of the identification algorithm. Copyright © 2017, The Authors. All rights reserved.

关键词： Computational complexity

来源：评论

学校读者我要写书评

暂无评论

Research on high precision ADC test based on modular hardware

引用

Journal of Physics: Conference Series 2021年第1期1920卷

作者： Tang Yao Xie Zeng Liang Wu Yun Wang Jian Guo Yu School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100000 China Beijing Zhongke Fanhua Measurement&Control Technology Beijing 100000 China

The design of digital systems in modern communication systems, network transmission systems, and computer multimedia systems has developed by leaps and bounds. The speed and accuracy of the interface circuit between analog and digital have become the key and bottleneck for the vigorous development of digital systems in the future. Correspondingly, the requirements for high-precision ADC performance testing technology and functional verification schemes are also getting higher and higher, and they have gradually been upgraded to an important technical obstacle that needs to be resolved, blocking the innovation of information technology in my country. This thesis first briefly introduces the static and dynamic test principles and techniques of high-precision ADC chips, summarizes the performance indicators of ADCs, and expounds the definitions of commonly used test parameters in more detail. Subsequently, modular equipment was used to build a high-performance test platform and a functional verification platform, and a software and hardware test platform was built with PXI modular equipment as the core to complete the system debugging and data processing of each part. The static parameters, Dynamic parameter indicators are measured and analyzed. The test verification system and research program of this program show that it meets the key index test and functional characteristic verification of high-precision ADC, and its test method has good flexibility, completeness, programmability, and versatility.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Deep Neural Network Enhanced Chip-on-Board Hybrid-Packaged Photonic-Electrical Silicon Transceiver for High-speed Optical Interconnects

Deep Neural Network Enhanced Chip-on-Board Hybrid-Packaged P...

引用

Conference on Lasers and Electro-Optics (CLEO)

作者： Jun Qin Qipeng Yang Changhao Han Yan Zhou Yunhao Zhang Yichen WU Yu Sun Junde Lu Siming Liu Yueqin Li Jian Sun Miao Min Weiwei Hu Zhixue He Lei Wang Shaohua Yu Haowen Shu Xingjun Wang Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument Beijing Information Science and Technology University Beijing China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing China Department of Electrical and Computer Engineering University of California Santa Barbara CA USA Peking University Yangtze Delta Institute of Optoelectronics Nantong China Peng Cheng Laboratory Shenzhen China State Key Laboratory of Information Photonics and Optical Communications BUPT Beijing China

We explore implementing a multilevel deep neural network to enhance the performance of a 4-channel photonic-electrical hybrid-packaged silicon transceiver. Stable transmission and reception of 150 Gbps/λ PAM4 signals... 详细信息

ISBN: (纸本)9798350369311

关键词： Electric potential Optical interconnections System performance Artificial neural networks Transceivers Silicon Electro-optical waveguides Photonics

来源：评论

学校读者我要写书评

暂无评论

Anomaly Detection of Predicted Frames Based on U-Net Feature Vector Reconstruction

引用

Journal of Physics: Conference Series 2020年第1期1627卷

作者： Yong Qiang Shumin Fei Yiping Jiao Liuwen Li Key Laboratory of Measurement and Control of CSE (Ministry of Education) School of Automation Southeast University Nanjing 210096 China School of Computer Engineering Jinling Institute of Technology Nanjing 211169 China

Anomaly detection in surveillance video scenes is one of the current research hotspots. Due to the small sample collection of anomalous events, the lack of negative sample labeling data training in anomaly detection research adds a lot of difficulties. Therefore, we adopt the method of unsupervised training and improve the method of anomaly detection based on the reconstruction of the potential features of the predicted frame and ground truth based on u-net. We reduce the reconstruction error between the potential features of u-net in the predicted frame and the potential features of the real frame. Then through other constraints, the reconstruction error of the entire predicted frame is minimized according to the generative adversarial training. Due to the use of normal behavior sample training, when the abnormal behavior is detected, the reconstruction error value exceeds the set threshold to judge whether abnormal behavior occurs in the surveillance video. Experiments prove that our improved method is effective and accurate.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Abnormal Behavior Detection Based on the Potential Field Forces in Surveillance Scenarios

引用

Journal of Physics: Conference Series 2020年第1期1487卷

作者： Yong Qiang Shumin Fei Liuwen Li Key Laboratory of Measurement and Control of CSE (Ministry of Education) School of Automation Southeast University Nanjing 210096 China School of Computer Engineering Jinling Institute of Technology Nanjing 211169 China

In a social environment, there is a natural mutual force between people. This paper proposes a method for detecting group abnormal behavior based on the potential field method. The movement of a pedestrian is described as the movement towards the target under the combined action of several forces. Forces on pedestrians include the attractive force for themselves and the repulsive force between pedestrians. By calculating the resultant force between them, the behavior of pedestrians is judged according to a set threshold. It is verified through experiments on public data sets that our method has high accuracy and robustness.

关键词：

来源：评论

学校读者我要写书评

暂无评论

measurement of Tank Cooling Airflow Based on Array Sensors

引用

Journal of Physics: Conference Series 2017年第1期916卷

作者： Hui Zhou Yan Han Jianguo Wang Pizhuang Zhang School of Information and Communication Engineering North University of China Taiyuan 030051 China North Automation Control Technology Institute Taiyuan 030006 China

Researching on the cooling airflow characters of tank will be helpful for optimizing the design of cooling system, and will be of great importance to improve the performance of armoured vehicles. According to the test requirements of tank under the actual working conditions, we studied and designed the proposed cooling airflow measurement system. The most important thing was that we finished the assembly of array sensors without any damage to tank. In addition, according to national standard we set the quantity and locations of the sensors, which was on the premise of avoiding the influence to airway. In this paper, there was description of cooling airflow signal processing; and there was analysis of air pressure distribution which was presented simultaneously by three-dimensional surface graph and plane graph at the exhaust port of tank engine compartment according to fitting algorithm.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：