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Chinese Journal of Aeronautics 2024年第8期37卷 293-310页

作者： Xinkai LI Lei DOU Hongli ZHANG yue meng School of Electrical Engineering Xinjiang UniversityUrumqi 830047China

A prescribed performance control scheme based on the three-inflection-point hyperbolic function and predefined time performance function is proposed to solve the trajectory tracking problem of the forward-tilting morphing aerospace vehicle with time-varying actuator *** accurately estimate the loss degree of actuator faults,an immersion and invariance observer based on the predefined time dynamic scale factor is designed to estimate and compensate it.A composite dynamic sliding mode surface is designed using a three-inflection-point hyperbolic function,and a novel three-inflection-point sliding mode control framework is *** convergent domain of the sliding manifold is adjusted by parameters,and the system error convergence is controllable.A transfer function is designed to eliminate the sensitivity of the three-inflection-point hyperbolic sliding mode to the unknown initial state,and combined with the barrier Lyapunov function,and the performance constraint of the system is *** global asymptotic stability of the system is demonstrated using a strict mathematical *** effectiveness and superiority of the proposed control scheme are proven by simulation experiments.

关键词： Morphing aerospace vehicle Actuator faults Immersion and invariance Three-inflection-point sliding mode control Prescribed performance control

T-ATMChain:Blockchain-Based Identity Authentication for Air Traffic Management

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China Communications 2024年第12期21卷 186-202页

作者： Lu Xin Wu Zhijun yue meng School of Safety Science and Engineering Civil Aviation University of ChinaTianjin 300300China School of Information Industry Shanxi College of TechnologyShanxi 036000China

The air traffic management(ATM)system is an intelligent system,which integrates the ground computer network,airborne network and space satellite(communication and navigation)network by the ground-air data link *** to the openness and widely distribution of ATM system,the trust relationship of all parties in the system is pretty *** present,public key infrastructure(PKI)based identity authentication method is more and more difficult to meet the growing demand of ATM ***,through the analysis of the organizational structure and operation mode of ATM system,this paper points out the existing identity authentication security threats in ATM system,and discusses the advantages of adopting blockchain technology in ATM ***,we briefly analyze some shortcomings of the current PKI-based authentication system in ***,to address the authentication problem,this paper proposes and presents a trusted ATM Security Authentication Model and authentication protocol based on ***,this paper makes a comprehensive analysis and simulation of the proposed security authentication scheme,and gets the expected effect.

关键词： air traffic management blockchain identity authentication security authentication

A Hybrid Intrusion Detection Method Based on Convolutional Neural Network and AdaBoost

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China Communications 2024年第11期21卷 180-189页

作者： Wu Zhijun Li Yuqi yue meng School of Safety Science and Engineering Civil Aviation University of ChinaTianjin 300300China School of Electronic Information and Automation Civil Aviation University of ChinaTianjin 300300China

To solve the problem of poor detection and limited application range of current intrusion detection methods,this paper attempts to use deep learning neural network technology to study a new type of intrusion detection ***,we proposed an intrusion detection algorithm based on convolutional neural network(CNN)and AdaBoost *** algorithm uses CNN to extract the characteristics of network traffic data,which is particularly suitable for the analysis of continuous and classified attack *** AdaBoost algorithm is used to classify network attack data that improved the detection effect of unbalanced data *** adopt the UNSW-NB15 dataset to test of this algorithm in the PyCharm *** results show that the detection rate of algorithm is99.27%and the false positive rate is lower than 0.98%.Comparative analysis shows that this algorithm has advantages over existing methods in terms of detection rate and false positive rate for small proportion of attack data.

关键词： AdaBoost CNN detection rate false positive rate feature extraction intrusion detection

Real-time anomaly detection for very short-term load forecasting

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Journal of Modern Power Systems and Clean Energy 2018年第2期6卷 235-243页

作者： Jian LUO Tao HONG meng yue School of Management Science and Engineering Dongbei University of Finance and Economics Department of Systems Engineering and Engineering Management University of North Carolina at Charlotte Brookhaven National Laboratory

Although the recent load information is critical to very short-term load forecasting(VSTLF), power companies often have difficulties in collecting the most recent load values accurately and timely for VSTLF *** paper tackles the problem of real-time anomaly detection in most recent load information used by *** paper proposes a model-based anomaly detection method that consists of two components, a dynamic regression model and an adaptive anomaly threshold. The case study is developed using the data from ISO New England. This paper demonstrates that the proposed method significantly outperforms three other anomaly detection methods including two methods commonly used in the field and one state-of-the-art method used by a winning team of the Global Energy Forecasting Competition 2014. Finally, a general anomaly detection framework is proposed for the future research.

关键词： Real-time anomaly detection Very short-term load forecasting Multiple linear regression Data cleansing

Continent-wide vocal leapfrog pattern in Collared Scops Owls obfuscates species boundaries

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Avian Research 2023年第4期14卷 565-571页

作者： meng yue Wu Frank E.Rheindt Department of Biological Sciences National University of Singapore16 Science Drive 4SingaporeRep Department of Environmental Sciences Zoological InstituteUniversity of BaselBaselSwitzerland

Much confusion has surrounded the taxonomy of the Collared Scops Owl(Otus bakkamoena)complex,distributed widely across tropical and subtropical *** divided into three species,modern taxonomies disagree on its treatment,as a lack of deep mitochondrial DNA divergence is seemingly in contrast with patterns of vocal *** a dataset of territorial calls of 122 individuals across Asia,we identified a vocal leapfrog pattern in which owl populations at the eastern and western ends of the distribution sound more similar to each other but are separated by different-sounding populations in *** boundaries between vocal types are not congruent with traditional species *** data allow for a re-drawing of species boundaries and reveal that Collared Scops Owls follow a biogeographic pattern rare in Southeast Asian ***,this pattern is shared with several other owl complexes in that peninsular Malaysian populations form part of a continental Asian species centred further north in Southeast Asia rather than forming part of a Sundaic species centred in the adjacent Indonesian Archipelago.

关键词： Asia Biogeography Species delimitation Taxonomy Bioacoustics

Unusual immunohistochemical“null”pattern of four mismatch repair proteins in gastric cancer:A case report

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World Journal of Clinical Cases 2021年第21期9卷 6102-6109页

作者： meng yue Jun-Ying Liu yue-Ping Liu Department of Pathology The Fourth Hospital of Hebei Medical UniversityShijiazhuang 050011Hebei ProvinceChina

BACKGROUND Immunohistochemical(IHC)staining for mismatch repair(MMR)proteins is useful for gastric cancer treatment and *** IHC staining patterns reflect the complex biological phenomena underlying MMR *** herein report a rare IHC staining pattern of four MMR-related proteins in gastric *** SUMMARY A“null”IHC staining pattern of four MMR-related proteins,including MLH1,PMS2,MSH2,and MSH6,in a 67-year-old male patient with gastric cancer pT3N3aM0 revealed promoter hypermethylation of ***-generation sequencing showed that these four genes exhibited *** of these was the somatic mutation of the missing copy number in exon 14 of *** analysis using peripheral blood showed no germline mutations in these four *** patient had no history of personal or family tumor *** classified this case as *** patient returned to normal after operation,and there were no signs of tumor metastasis and *** six cycles of adjuvant chemotherapy,the patient was discharged in a stable *** patient had a mild reaction to chemotherapy and a good *** present,16 mo after the operation,the patient's condition is *** Abnormal MMR protein expression,helpful for individualized follow-up care,helped identify a sporadic case lacking familial clinical management implications.

关键词： Gastric cancer Mismatch repair proteins Next-generation sequencing Sporadic Family management Case report

LDDoS attack detection method based on wavelet decomposition and sliding windows

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The Journal of China Universities of Posts and Telecommunications 2020年第1期27卷 51-61页

作者： Liu Liang Feng Wenzhi Wu Zhijun yue meng School of Electronic Information and Automation Civil Aviation University of ChinaTianjin 300300China

As a special type of distributed denial of service(DDoS) attacks, the low-rate DDoS(LDDoS) attacks have characteristics of low average rate and strong concealment, thus, it is hard to detect such attacks by traditional approaches. Through signal analysis, a new identification approach based on wavelet decomposition and sliding detecting window is proposed. Wavelet decomposition extracted from the traffic are used for multifractal analysis of traffic over different time scale. The sliding window from flow control technology is designed to identify the normal and abnormal traffic in real-time. Experiment results show that the proposed approach has advantages on detection accuracy and timeliness.

关键词： low-rate distributed denial of service attacks wavelet analysis sliding windows detection

TESLA-Based Authentication for BeiDou Civil Navigation Message

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China Communications 2020年第11期17卷 194-218页

作者： Zhijun Wu Yun Zhang Liang Liu meng yue The College of Electronic Information&Automation Civil Aviation University of ChinaTianjin 300300China

Due to the civil BeiDou navigation system is open,unauthenticated,and non-encrypted,civilian BeiDou navigation signals may have great security loopholes during transmission or *** main security loophole here is spoofing *** attacks make the positioning or timing results of BeiDou civilian receivers *** errors may cause a series of security problems,which lays a serious hidden danger for Bei-Dou satellite information *** article proposes an anti-spoofing method for BeiDou navigation system based on the combination of SM commercial cryptographic algorithm and Timed Efficient Stream Loss-tolerant Authentication(TESLA)for spoofing *** this solution,we use the SM3 algorithm to generate a TESLA key chain with time information,and then use the key in the key chain to generate the message authentication code for the BeiDou D2 navigation *** message authentication code is inserted into a reserved bit of the D2 navigation *** addition,this solution uses the SM2 algorithm to protect and encrypt time information in the TESLA key chain to prevent key replay attacks in *** experimental results tested on the experimental platform built in this paper show that this scheme reduces the possibility of the BeiDou navigation system being deceived and enhances the safety of the BeiDou navigation system.

关键词： BeiDou navigation system SM commercial cryptographic algorithm TESLA message authentication code D2 navigation message

Low-Rate DoS Attack Flows Filtering Based on Frequency Spectral Analysis

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China Communications 2017年第6期14卷 98-112页

作者： Zhijun Wu Minxiao Wang Changcan Yan meng yue The College of Electronic Information & Automation Civil Aviation University of China Tianjin 300300China

In frequency domain,the power spectrum of Low-rate denial of service(LDoS) attacks is totally spread into the spectrum of normal *** is a challenging task to detect and filter LDoS attack flows from the normal *** on the analysis of LDoS attack flows and legitimate TCP traffic in time and frequency domains,the periodicity of the TCP traffic and LDoS attack flows is explored to facilitate the research of network traffic ***,an approach of LDoS attack flow filtering based on frequency spectrum analysis is *** this approach,the TCP traffic and LDoS attack flows are transformed from the time domain into the frequency *** the round-trip time(RTT) is estimated by using frequency domain search *** of amplitude spectrum shows that TCP traffic energy is mainly concentrated on the points of n/***,a comb filter using infinite impulse response(IIR) filter is designed to filter out the LDoS attack flows in frequency domain,while most legitimate TCP traffic energy at the points of n/RTT are pass *** results show that the maximum pass rate for legitimate TCP traffic reaches 92.55%,while the maximum filtration rate of LDoS attack flows reaches 81.36%.The proposed approach can effectively filter the LDoS attack flows while less impact on the legitimate TCP traffic.

关键词： low-rate denial of service (ldos) spectrmn analysis infinite impulse response (iir) filter filtering

Development of High-Pressure Multigrain X-Ray Diffraction for Exploring the Earth’s Interior

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Engineering 2019年第3期5卷 441-447页

作者： Li Zhang Hongsheng Yuan yue meng Ho-Kwang Mao Center for High Pressure Science and Technology Advanced Research (HPSTAR) Shanghai 201203 China HPCAT X-Ray Science Division Argonne National Laboratory Argonne IL 60439 USA Geophysical Laboratory Carnegie Institution of Washington Washington DC 20015 USA

The lower mantle makes up more than a half of our planet’s volume. Mineralogical and petrological experiments on realistic bulk compositions under high pressure–temperature (P–T) conditions are essential for understanding deep mantle processes. Such high P–T experiments are commonly conducted in a laser-heated diamond anvil cell, producing a multiphase assemblage consisting of 100 nm to submicron crystallite grains. The structures of these lower mantle phases often cannot be preserved upon pressure quenching;thus, in situ characterization is needed. The X-ray diffraction (XRD) pattern of such a multiphase assemblage usually displays a mixture of diffraction spots and rings as a result of the coarse grain size relative to the small X-ray beam size (3–5 lm) available at the synchrotron facilities. Severe peak overlapping from multiple phases renders the powder XRD method inadequate for indexing new phases and minor phases. Consequently, structure determination of new phases in a high P–T multiphase assemblage has been extremely difficult using conventional XRD techniques. Our recent development of multigrain XRD in high-pressure research has enabled the indexation of hundreds of individual crystallite grains simultaneously through the determination of crystallographic orientations for these individual grains. Once indexation is achieved, each grain can be treated as a single crystal. The combined crystallographic information from individual grains can be used to determine the crystal structures of new phases and minor phases simultaneously in a multiphase system. With this new development, we have opened up a new area of crystallography under the high P–T conditions of the deep lower mantle. This paper explains key challenges in studying multiphase systems and demonstrates the unique capabilities of high-pressure multigrain XRD through successful examples of its applications.

关键词： High pressure Synchrotron X-ray Multigrain Diamond anvil cell Minerals Petrology Earth’s interior