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Information-centric networking (ICN), a strong candidate for future internet architecture, consists of two kinds of packets, interest and data packets, both of which carry the name of data content to be requested (or delivered). The data packet is associated with a public key signature so that the data receiver can verify the data packet's correctness, integrity and provenance. Certificate-based signature...
In order to bring the simulation system closer to the actual locomotive run properties, ease to observe locomotive system response in real-time. The fuel cell hybrid locomotive system established in this paper, consists of 150 kW proton exchange membrane fuel cell (PEMFC) power generation system, DC/DC converter, battery energy store system, three-phase asynchronous traction motor, etc. And designs...
Traditional deception-based cyber defenses often undertake reactive strategies that utilize decoy systems or services for attack detection and information gathering. Unfortunately, the effectiveness of these defense mechanisms has been largely constrained by the low decoy fidelity, the poor scalability of decoy platform, and the static decoy configurations, which allow the attackers to identify and...
Functional electrical stimulation (FES), applied to paralyzed or paretic muscles, can facilitate arm-free standing in patients with neurological disorders. At the same time, it has been shown that the able-bodied central nervous system regulates standing balance using a control strategy similar to proportional-integral-derivative (PID) control. The objective of this study was to investigate the capability...
Interior permanent magnet synchronous machine (IPMSM) has been widely used in traction application due to high efficiency and high power density. Nowadays, in electric vehicle application, the average efficiency over a driving cycle (AEDC) is more attractive than the efficiency over single working point. The paper deals with the design optimization of the average efficiency over a given driving cycle...
Current control of IPMSM servo system is investigated in this paper. Under the field-weakening control framework, nonlinear couplings of the voltage equations are very strong. The current control performance may not be well until such nonlinear couplings are well dealed. In this case, a DOB-based model predictive control is proposed to improve the current control performance under field-weakening...
Multi-Authority Attribute-Based Encryption (MA-ABE) is a practical cryptographic primitive for enforcing fine-grained attribute-based access control of personal health information (PHI) in mobile healthcare (mHealth) cloud. Existing schemes are either limited to restricted attribute universe or lack of efficient decryption algorithm for users. In this paper, we propose an efficient and secure multi-authority...
A novel actuator fault reconstruction scheme based on neural network and adaptive sliding mode observer is presented for a class of nonlinear systems with uncertainty. To improve the accuracy of actuator fault reconstruction, the radial basis function neural network is applied to approximate the uncertainty on line. An adaptive algorithm is designed to modify the gain of the controller by considering...
In the distillation process, many important process variables are often difficult to be measured online. For example, the aviation kerosene is an important index of operation quality, but current methods cannot obtain the real-time value of the aviation kerosene efficiently. To solve this problem, a method of selecting the input variable based on partial least squares regression (PLS) is proposed...
To remove redundant variables and resolve the high correlation problem of soft sensor modelling, this paper proposed an efficient mutual information(MI) based partial least squares(PLS) method. First, we use MI criterion to sort the variables in a descending order according to their importance. Then the linearity between process variables and quality variables is tested through F test. If there is...
In this paper, an improved cascade second-order sliding mode (SOSM) methodology for a polymer electrolyte membrane (PEM) fuel cell air supply system is proposed. Based on the simplified six-order nonlinear model, the control objective oxygen excess ratio is achieved by using SOSM algorithm. Besides, parametric uncertainty and noise are presented in the dynamic fuel cell model. The modified two stage...
In this paper, a hierarchical control of energy management strategy is proposed based on tram hybrid hybrid system. In this strategy, the top strategy achieves the energy distribution between the various systems under different operating conditions by dividing the running status of trams. And the bottom strategy achieves the energy distribution between multiple sets of each energy system. In the bottom...
In order to develop a fault diagnosis strategy in tramway environment, multiclass relevance vector machine (mRVM) based fault diagnosis strategy for proton exchange membrane fuel cell (PEMFC) of hybrid tramway is proposed. The method can quickly identify three kinds of fault states, such as the low hydrogen pressure, the low pressure of deionized water humidification pump and the bus communication...
This paper presents the design and the measured results of a GaN-based T/R MMIC suitable for millimeter-wave 5G applications. The design successfully integrated a PA, an LNA, and a T/R switch in one IC. At 39GHz, the transmit path achieved an average output power of 26dBm with 9% PAE and −30dBc ACPR under a 64QAM OFDM signal. The receive path achieved 16dB gain with 4dB NF. The fabricated MMIC is...
This paper is concerned with the distributed sampled-data H∞ state estimation problem for a class of discrete time-invariant systems over sensor networks. The plant under consideration is sampled with a fast period. The sampling intervals of the measurements are integer multiples of the fast period and the sampling processing is characterized by a Markov chain. In order to estimate the plant state,...
This paper focuses on investigating the influence of design parameters on characteristics of external rotor permanent magnet synchronous machine (PMSM). Under the constraint of torque density, the effects of pole number and teeth height ratio on copper and iron losses are studied, as well as motor efficiency and winding temperature rise. Finally, to meet the need of the new micro-EV C11CB by Beijing...
This paper attempts to study the effect of energy management strategy based on state machine on the performance of air-cooled fuel cell-battery hybrid system, for which the hybrid power system test platform composed of air-cooled fuel cell, lithium battery and DC converter was built. The reliability and stability of the hybrid system and the effectiveness of the energy management strategy based on...
Motor current signature analysis (MCSA) provides a non-invasive approach to diagnose the gear fault. The performance of MCSA at different speed and load torque conditions is studied using Fast Fourier Transform (FFT) to extract fault features. The results show that it would be better to perform fault diagnosis under low speed and heavy load conditions. And it fails when adopting FFT to diagnose the...
By analyzing the defects of existing task mapping algorithms, this paper proposed a novel fault model based on spare core technology, and a fault-aware low power-dissipation dynamic task mapping algorithm FLDMA is designed based on NoC system fault, power dissipation and system performance. In the algorithm design, this paper presented the minimum mapping area selection method, designed the first-node...
The external rotor surface permanent magnet (SPM) machine is attractively used for in-wheel traction application. In view of energy consumption, the efficiency of SPM machine over a driving cycle is more important than that at a single working point. This paper focuses on optimizing the external rotor SPM machine considering a target driving cycle. Under a target driving cycle, the whole motor working...
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