Zhejiang University Press

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Ensemble enhanced active learning mixture discriminant analysis model and its application for semi-supervised fault classification
Zhejiang University Press - - 2022
Weijun Wang, Yun Wang, Jun Wang, Xinyun Fang, Yuchen He
On observability of Galois nonlinear feedback shift registers over finite fields
Zhejiang University Press - Tập 23 - Trang 1533-1545 - 2022
Zhe Gao, Jun’e Feng, Yongyuan Yu, Yanjun Cui
Observability ensures that any two distinct initial states can be uniquely determined by their outputs, so the stream ciphers can avoid unobservable nonlinear feedback shift registers (NFSRs) to prevent the occurrence of equivalent keys. This paper discusses the observability of Galois NFSRs over finite fields. Galois NFSRs are treated as logical networks using the semi-tensor product. The vector ...... hiện toàn bộ
Ball-disk rotor gyroscope adaptive quick-start technique
Zhejiang University Press - Tập 18 - Trang 1430-1436 - 2017
Xiao-wei Liu, Rui Weng, Hai Li, Hai-feng Zhang
Rotating speed is a critical parameter affecting the performance of rotor gyroscopes. Rotor gyroscopes must operate at the rated rotating speed. To shorten the start time of the ball-disk rotor gyroscope, this paper presents a new design of the drive system for a ball-disk rotor gyroscope. The drive system is monitored by a microcontroller. First, the microcontroller generates a sine pulse width m...... hiện toàn bộ
A general altitude-dependent path loss model for UAV-to-ground millimeter-wave communications
Zhejiang University Press - Tập 22 - Trang 767-776 - 2021
Qiuming Zhu, Mengtian Yao, Fei Bai, Xiaomin Chen, Weizhi Zhong, Boyu Hua, Xijuan Ye
A general empirical path loss (PL) model for air-to-ground (A2G) millimeter-wave (mmWave) channels is proposed in this paper. Different from existing PL models, the new model takes the height factor of unmanned aerial vehicles (UAVs) into account, and divides the propagation conditions into three cases (i.e., line-of-sight, reflection, and diffraction). A map-based deterministic PL prediction algo...... hiện toàn bộ
Neuro-heuristic computational intelligence for solving nonlinear pantograph systems
Zhejiang University Press - Tập 18 - Trang 464-484 - 2017
Abdul Majid Wazwaz, Muhammad Asif Zahoor Raja, Muhammed Ibrahem Syam, Iftikhar Ahmad, Imtiaz Khan
We present a neuro-heuristic computing platform for finding the solution for initial value problems (IVPs) of nonlinear pantograph systems based on functional differential equations (P-FDEs) of different orders. In this scheme, the strengths of feed-forward artificial neural networks (ANNs), the evolutionary computing technique mainly based on genetic algorithms (GAs), and the interior-point techn...... hiện toàn bộ
Designing a novel consensus protocol for multiagent systems with general dynamics under directed networks
Zhejiang University Press - Tập 18 - Trang 1071-1081 - 2017
Hao-liang Li, Ren-nong Yang, Qiu-ni Li
The consensus problem for general linear multi-agent systems (MASs) under directed topology is investigated. First, a novel consensus protocol based on proportional-integral-derivative (PID) control is proposed. Second, the consensus problem is converted into an asymptotic stability problem through transformations. Third, through a state projection method the consensus condition is proved and the ...... hiện toàn bộ
Robust mismatched filtering algorithm for passive bistatic radar using worst-case performance optimization
Zhejiang University Press - - 2020
Gang Chen, Jun Wang
High-accuracy target tracking for multistatic passive radar based on a deep feedforward neural network
Zhejiang University Press - Tập 24 - Trang 1214-1230 - 2023
Baoxiong Xu, Jianxin Yi, Feng Cheng, Ziping Gong, Xianrong Wan
In radar systems, target tracking errors are mainly from motion models and nonlinear measurements. When we evaluate a tracking algorithm, its tracking accuracy is the main criterion. To improve the tracking accuracy, in this paper we formulate the tracking problem into a regression model from measurements to target states. A tracking algorithm based on a modified deep feedforward neural network (M...... hiện toàn bộ
Versionized process based on non-volatile random-access memory for fine-grained fault tolerance
Zhejiang University Press - Tập 19 - Trang 192-205 - 2018
Wen-zhe Zhang, Kai Lu, Xiao-ping Wang
Non-volatile random-access memory (NVRAM) technology is maturing rapidly and its byte-persistence feature allows the design of new and efficient fault tolerance mechanisms. In this paper we propose the versionized process (VerP), a new process model based on NVRAM that is natively non-volatile and fault tolerant. We introduce an intermediate software layer that allows us to run a process directly ...... hiện toàn bộ
Coverage performance of the multilayer UAV-terrestrial HetNet with CoMP transmission scheme
Zhejiang University Press - Tập 23 - Trang 61-72 - 2022
Weihao Wang, Yifan Jiang, Zesong Fei, Jing Guo
To support the ubiquitous connectivity requirement of sixth generation communication, unmanned aerial vehicles (UAVs) play a key role as a major part of the future communication networks. One major issue in UAV communications is the interference resulting from spectrum sharing and line-of-sight links. Recently, the application of the coordinated multipoint (CoMP) technology has been proposed to re...... hiện toàn bộ
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