检索结果-内蒙古大学图书馆

Qubit-Based synchronization algorithm for Measurement-Device-Independent Quantum Key Distribution

JOURNAL OF LIGHTWAVE TECHNOLOGY 2025年第7期43卷 3041-3050页

作者： Huang, Zheng-Kai Li, Jia-Xuan Lu, Feng-Yu Wang, Ze-Hao Wang, Shuang Yin, Zhen-Qiang He, De-Yong Chen, Wei Guo, Guang-Can Han, Zheng-Fu Univ Sci & Technol China CAS Key Lab Quantum Informat Hefei 230026 Peoples R China Univ Sci & Technol China CAS Ctr Excellence Quantum Informat & Quantum Phys Hefei 230026 Peoples R China Univ Sci & Technol China Hefei Natl Lab Hefei 230088 Peoples R China

Measurement-device-independent quantum key distribution (MDI-QKD) is considered one of the most promising protocols due to its high performance and security. To implement the MDI-QKD system in practice, clock synchronization is a crucial step to correctly generate the secret keys. However, as practical applications advance, the complexity and cost of synchronization have become significant challenges for the implementation of MDI-QKD. In this study, we introduce a qubit-based synchronization algorithm specifically designed for MDI-QKD. By utilizing the property of Hong-Ou-Mandel interference, we achieve clock synchronization between parties of MDI-QKD without the need for additional hardware. The cost-effectiveness and simplicity of this approach are expected to significantly facilitate the practical deployment of MDI-QKD.

关键词： synchronization Clocks Qubit Interference Protocols Delays Time-frequency analysis Detectors Costs Simulation Clock synchronization measurement-device-independent quantum key distribution synchronization algorithm

来源：评论

学校读者我要写书评

暂无评论

A multiplayer MR application based on adaptive synchronization algorithm 7

A multiplayer MR application based on adaptive synchronizati...

引用

7th International Conference on Control, Decision and Information Technologies (CoDIT)

作者： Zhang, Xi Hu, Youmin Huan, Tao Huazhong Univ Sci & Technol Sch Mech Sci & Engn Wuhan Peoples R China

ISBN: (纸本)9781728159539

With the popularity of virtual reality technology, it's application in the field of engineering educational and training has gradually increased. This article introduces a multiplayer mixed reality (MR) application that supports remote participants to operate engineering equipment and learn operation process in the shared virtual environment, and it explores the impact of network factors on user experience. According to the characteristics of the application, it proposes a corresponding adaptive strategy based on an existing synchronization algorithm, meantime, a comprehensive evaluation method is proposed.

关键词： Multiplayer MR application synchronization algorithm latency

来源：评论

学校读者我要写书评

暂无评论

synchronization algorithm for a Satellite Communication Signals Demodulator in High Carrier Shift Conditions

Synchronization Algorithm for a Satellite Communication Sign...

引用

Systems of Signals Generating and Processing in the Field of on Board Communications Conference

作者： Zhuravlev, A. P. Moscow Tech Univ Commun & Informat Moscow Russia

ISBN: (纸本)9781728106069

This paper discusses radio interfaces in satellite communications with phase types of modulation and framed signal structure. It outlines several different frequency-time synchronization algorithms of demodulator, specifies the features and conditions for their use. As a result it describes combined synchronization algorithm, which is able to work effectively in conditions of high and variable carrier frequency shift values.

关键词： satellite communications synchronization algorithm demodulation frequency estimation

来源：评论

学校读者我要写书评

暂无评论

Adaptation of the Frame synchronization algorithm of the Second Generation Satellite Broadcasting Standard DVB-S2 for Communication System 22nd

Adaptation of the Frame Synchronization Algorithm of the Sec...

引用

22nd International Conference on Distributed Computer and Communication Networks (DCCN)

作者： Antiufrieva, Liubov Ivchenko, Aleksandr Natl Res Univ Moscow Inst Phys & Technol Moscow Russia

ISBN: (纸本)9783030366254;9783030366247

The possibility of adapting the frame synchronization algorithm of second generation satellite broadcasting standard DVB-S2 for communication system is considered. The issue of frame synchronization is being studied in conditions when the base station determines the parameters of the physical layer and the time and frequency slot. Frame synchronization algorithms used in DVB-S2 are analyzed. An adaptation of the frame synchronization algorithm for communication system that solves the problem of frame synchronization from the first frame is proposed.

关键词： Communication system Broadcasting system Satellite communication Satellite modem DVB-S2 Physical layer frame synchronization algorithm Frame synchronization

来源：评论

学校读者我要写书评

暂无评论

Thermal flutter prediction at trajectory points of a hypersonic vehicle based on aerothermal synchronization algorithm

引用

AEROSPACE SCIENCE AND TECHNOLOGY 2019年 94卷 105381-000页

作者： Guo, Tongqing Shen, Ennan Lu, Zhiliang Zhou, Di Wu, Jiangpeng Nanjing Univ Aeronaut & Astronaut Key Lab Unsteady Aerodynam & Flow Control Minist Ind & Informat Technol Yudao St 29 Nanjing 210016 Jiangsu Peoples R China Shenyang Aircraft Design & Res Inst Shenyang 110035 Liaoning Peoples R China

Due to orders of magnitude differences in time scale between structural heat transfer and aeroelastic responses, one-way aerothermal-aeroelastic coupling is adopted to develop a thermal flutter prediction method for a hypersonic vehicle operating along a desired trajectory. In view of the strong dependency of the heat transfer process on the unsteady hypersonic trajectory, an aerothermal synchronization algorithm is established in a non-inertial frame of reference by formulating the governing equations of fluid flow and heat transfer into a unified form. Then the heated free-vibration frequencies and mode shapes are calculated at each trajectory point by using a finite-element analysis. Consequently, the flutter computations are performed on the transiently heated structure at each trajectory point by utilizing a coupled computational fluid dynamics (CFD)/computational structural dynamics (CSD) method. Because of the mass dissimilarity caused by directly increasing the dynamic pressure of a compressible flow, the technique of variable stiffness is introduced to evaluate the flutter dynamic pressure at the point of mass similarity and the stiffness margin of flutter. The present method is applied to the thermal flutter computations of a hypersonic all-movable rudder operating along a given trajectory. The computed temperature differences between the synchronization and conventional partitioned methods, and the significant effects of aerodynamic heating on the structural modes and the flutter characteristics are analyzed in detail. (C) 2019 Elsevier Masson SAS. All rights reserved.

关键词： Hypersonic vehicle Trajectory Thermal flutter Aerothermal synchronization algorithm CFD/CSD

来源：评论

学校读者我要写书评

暂无评论

Research on synchronization Control algorithm of Gantry-Type Motion Platform Based on IC Package 20

Research on Synchronization Control Algorithm of Gantry-Type...

引用

20th International Conference on Electronic Packaging Technology (ICEPT)

作者： He, Yunbo Li, Zhanchao Gao, Jian Cui, Chengqiang Guangdong Univ Technol Sch Electromech Engn State Key Lab Precis Elect Mfg Technol & Equipmen Guangzhou Peoples R China

ISBN: (纸本)9781728150642

As global semiconductor gradually develop into the post-Moore era, the status of microelectronic packaging technology in the IC industry is becoming increasingly prominent, and the requirements for high precision and high speed of microelectronic packaging equipment are also increasing. The gantry type motion platform is widely used in chip packaging. However, due to the mechanical coupling of the beam between the two linear motors of the gantry type motion platform, the system positioning accuracy and synchronization performance are seriously affected. In this paper, a self-made gantry motion platform is taken as the research object, and a cross-coupling synchronization algorithm based on fuzzy feedforward controller is proposed to realize the synchronous control of the system, including a fuzzy feedforward controller and a compensation controller based on cross-coupling principle. The cross-coupling controller takes the speed difference of two linear motors as the input signals, which compensates to the speed loop after being adjusted by the PI controller. The simulation results show that the cross-coupling synchronization algorithm based on fuzzy feedforward control can ensure the positioning accuracy, the response speed is faster, the anti-interference ability is stronger, and the synchronous follow performance is good, which basically meets the high-speed and high-precision requirements of the microelectronic packaging industry.

关键词： gantry motion platform fuzzy control feedforward controller synchronization algorithm

来源：评论

学校读者我要写书评

暂无评论

Research on virtual flux oriented synchronization algorithm for three-phase grid voltages

Research on virtual flux oriented synchronization algorithm ...

引用

2018 3rd International Conference on Automation,Mechanical Control and Computational Engineering(AMCCE 2018)

作者： Lu Wang Department of Mathematics and Information Engineering Chongqing University of Education

To deal with the synchronization of three-phase grid-connected converters, a synchronization algorithm based on virtual flux orientation is proposed in this paper. By introducing a low-pass filter and a high-pass filter, the orthogonal components of the virtual flux under the αβ stationary coordinate frame that αψ and βψ corresponding to the three-phase voltages can be calculated, and a decoupling compensation is adopted to eliminate the influence of these filters on the fundamental component of virtual flux. Then the phase angle of the three-phase grid voltages can be derived directly according to αψ and βψ, without any rotating coordinate transformation. The simulation results show that this algorithm can extract the phase angle of the fundamental component of grid voltage quickly and accurately under unideal power grid conditions, and it also has strong ability of frequency adaptation.

关键词： three-phase grid voltages synchronization algorithm virtual flux orientation filter decoupling compensation

来源：评论

学校读者我要写书评

暂无评论

Study and Implementation of synchronization algorithm in Three Phase Grid Connected PV System 3

Study and Implementation of Synchronization Algorithm in Thr...

引用

3rd IEEE International Conference on Recent Advances in Information Technology (RAIT)

作者： Naick, B. K. Das, Manisha Chatterjee, T. K. Chatterjee, K. Indian Sch Mines Dept Elect Engn Dhanbad Bihar India

ISBN: (纸本)9781479985791

This paper presents the study and simulation of synchronization algorithm for a three phase grid connected photovoltaic (PV) system. The synchronization algorithm employs synchronous reference frame based phase locked loop with a positive sequence detection. As compared to other methods, this algorithm provides a higher degree of immunity and insensitivity to noise and harmonic distortions. The maximum efficiency of the system may be achieved by overcoming the voltage unbalances and frequency distortion using this algorithm. The synchronization algorithm is studied by using a three phase parallel, 6 kilowatt load connected to three phase grid connected photovoltaic system.

关键词： photovoltaic system synchronization algorithm phase locked loop controller

来源：评论

学校读者我要写书评

暂无评论

Characteristic Analysis and Fast Adaptive synchronization algorithm of GPS CNAV-2 Navigation Message synchronization Code

Characteristic Analysis and Fast Adaptive Synchronization Al...

引用

5th China Satellite Navigation Conference (CSNC)

作者： Deng, Zhong-liang Li, Jie-qiang Li, Chang-ming Yin, Lu Xi, Yue Beijing Univ Posts & Telecommun Beijing 100876 Peoples R China

ISBN: (纸本)9783642547379;9783642547362

In the navigation data processing, the speed and accuracy of the frame synchronization processing plays an important role in system efficiency and signal analysis. Unlike other navigation message which synchronized using a fixed sequence, In GPS L1C CNAV-2 navigation message, and the synchronization code uses the BCH (51, 8) code based TOI (Time of Interval) and is no longer fixed binary sequence. The TOI, in GPS L1C CNAV-2 navigation message, is the 18 s count value in every 2 h while indicated by ITOW (Interval Time of Week) and cyclically changes between 0 and 399. Thus, the BCH coding generated by the TOI is circular. Thus, the synchronization algorithm used in fixed binary sequence does not work anymore. Beside, circularity makes us have to count maximum correlation in the two adjacent frames simultaneously and traversal 256 pairs of sequences at last in each detection, which influence the speed of the frame detection and the real timeliness of receiver. To solve this problem, beginning with the shift registers which generate synchronized code of GPS L1C CNAV-2 navigation message, this paper analysis the three characteristics of the loop resistance, autocorrelation, and cross-correlation. Then, the paper designs the fast adaptive synchronization algorithm for GPS L1C CNAV-2 navigation message. In this synchronization algorithm, the first step is estimating the number of error bit in the front nine bit of 52 bit, an integral BCH coding. Then, filter and sort these possible pairs of sequences. When we count the maximum correlation in the two adjacent frames simultaneously, the pairs of sequences is detected based on the priority order. Thus, the fast adaptive synchronization algorithm makes the fast synchronization and low rate of false synchronization in different signal conditions.

关键词： GPS L1C synchronization codes characteristics Adaptive synchronization algorithm

来源：评论

学校读者我要写书评

暂无评论

An Integrated synchronization and Control Strategy for Parallel-Operated Inverters Based on V-I Droop Characteristics

引用

IEEE TRANSACTIONS ON POWER ELECTRONICS 2022年第5期37卷 5373-5384页

作者： Cao, Wenyuan Han, Minxiao Zhang, Xiahui Guan, Yajuan Guerrero, Josep M. Vasquez, Juan C. North China Elect Power Univ Sch Elect & Elect Engn Beijing 102206 Peoples R China Aalborg Univ Dept Energy Technol DK-9220 Aalborg Denmark

Voltage-current (V-I) droop control is becoming a promising alternative to achieve proper power sharing among the parallel-operated voltage-sourced inverters (VSIs). Compared with the conventional droop control, this method has a simpler structure and a better dynamic performance because it saves the power loop (including the low-pass filters). However, due to the absence of the power loop related to the system frequency, the synchronization of VSIs becomes an intractable issue. To tackle this, a communication-free algorithm to synchronize and control the VSIs is proposed. Initially, the principle of V-I droop control is presented straightforwardly based on the virtual impedance. Then, a synchronization algorithm is incorporated into the V-I droop controller for accurate power sharing. This algorithm adaptively adjusts the phase step of each VSI according to the phase differences between VSI and the ac bus. In this way, the phase differences of each VSI to the ac bus eventually converge to an identical value, thus realizing the synchronization of VSIs. A detailed parameter design method is also implemented considering both system stability and power quality. Finally, the proposed strategy is validated experimentally using a three-parallel-VSIs system.

关键词： synchronization Impedance Voltage control Power harmonic filters Inverters Resistance Frequency control synchronization algorithm virtual impedance voltage-current droop voltage-sourced inverter

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：