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作者： Duan, Lijuan Lian, Zhaoyang Chen, Juncheng Qiao, Yuanhua Miao, Jun Li, Mingai Faculty of Information Technology Beijing University of Technology Beijing China Beijing Key Laboratory of Trusted Computing Beijing University of Technology Beijing China National Engineering Laboratory for Key Technologies of Information Security Level Protection Beijing University of Technology Beijing China Applied Sciences Beijing University of Technology Beijing China School of Computer Science Beijing Information Science and Technology University Beijing China

Epilepsy seriously damages the physical and mental health of patients. Detection of epileptic EEG signals in different periods can help doctors diagnose the disease. The change of frequency components during epilepsy seizures is obvious, and there may be noises in epilepsy EEG signals. Moreover, epileptic seizures are closely related to the release of neuronal spiking in the brain. In this paper, we propose an approach for epilepsy period classification based on combination feature extraction methods and spiking swarm intelligent optimization classification algorithm. First, combination feature extraction methods take in account both the time-frequency features and principal component features of epilepsy. The time-frequency features are obtained by WPT or STFT-PSD, and noises are removed while extracting principal component features by PCA. Second, spiking swarm intelligent optimization classification algorithm takes advantage of individual cooperation and information interaction with strong robustness. Its simulated neurons are closer to reality, which consider more information and obtain stronger computing power. The experimental results show that the average classification accuracy of the proposed method can reach 98.95% and the highest classification accuracy can reach 100%. Compared with other methods, the proposed method has the best classification performance. © 2020 John Wiley & Sons, Ltd.

关键词： Classification (of information)

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Multi-action self-healing coatings with simultaneous recovery of corrosion resistance and adhesion strength

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Journal of Materials Science & technology 2022年第6期101卷 18-27页

作者： Chenhao Ren Yao Huang Wenkui Hao Dawei Zhang Xiejing Luo Lingwei Ma Jinke Wang Thee Chowwanonthapunya Chaofang Dong Xiaogang Li Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Advanced Power Transmission Technology(Global Energy Interconnection Research Institute Co.Ltd.) Beijing 100083China Faculty of International Maritime Studies Kasetsart UniversitySriracha Campus199 TungsuklaSrirachaChonburi 20230Thailand BRI Southeast Asia Network for Corrosion and Protection(MOE) Shunde Graduate School of University of Science and Technology BeijingFoshan 528300China

In this study, a new self-healing strategy that can simultaneously recover the corrosion resistance and the adhesion strength of coatings was introduced. The coating was based on a shape memory epoxy resin containing ethylene vinyl acetate(EVA) microspheres loaded with Ce(NO_(3))_(3)inhibitors, and was cured at a relatively high temperature to facilitate the fusion of adjacent microspheres for a strengthened self-healing effect. The electrochemical impedance spectroscopy(EIS) and scanning electrochemical microscopy(SECM) results demonstrated that the shape memory effect of epoxy matrix, the filling of molten EVA microspheres as well as the release of Ce(NO_(3))_(3)inhibitors contributed synergistically to suppress the corrosion reaction at the coating damage. After healing, the low frequency impedance modulus of the coatings containing Ce(NO_(3))_(3)-EVA microspheres was three orders of magnitude higher than that of the blank epoxy coating. The adhesion strength of the coatings containing Ce(NO_(3))_(3)-EVA microspheres on the metal substrate was also largely repaired thanks to the strong bonding effect of the EVA microspheres.

关键词： Self-healing coating Corrosion protection Adhesion strength Shape memory effect Bonding effect

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Photothermal and pH dual-responsive self-healing coating for smart corrosion protection

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Journal of Materials Science & technology 2022年第12期107卷 34-42页

作者： Yao Huang Panjun Wang Weimin Tan Wenkui Hao Lingwei Ma Jinke Wang Tong Liu Fan Zhang Chenhao Ren Wei Liu Dawei Zhang Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China National Engineering Research Center for Coatings CNOOC Changzhou Paint and Coatings Industry Research InstituteChangzhou 213016China State Key Laboratory of Advanced Power Transmission Technology(Global Energy Interconnection Research Institute Co.Ltd. )Beijing 100083China BRI Southeast Asia Network for Corrosion and Protection(MOE) Shunde Graduate School of University of Science and Technology BeijingFoshan 528300China

A novel self-healing coating with photothermal and pH dual-responsive properties has been designed to protect carbon steel against corrosion by loading the stimuli-responsive microcapsules into a shape memory epoxy coating. The sandwich-like microcapsules were based on reduced graphene oxide/mesoporous silica(r GO@MS) assembled with a p H-responsive poly(N,N-dimethylaminoethyl methacrylate)(PDMAEMA) layer, and were loaded with benzotriazole(BTA) inhibitors(abbreviated as rGO@MS-P-BTA). Under near-infrared(NIR) light irradiation, the prominent photothermal effect of rGO could not only elevate the coating temperature to activate the shape memory effect and close the coating scratch, but also facilitate the release of corrosion inhibitors to suppress the corrosion activity. Moreover,the PDMAEMA as a p H-driven “gatekeeper” realized the controlled release of BTA from microcapsules at acid conditions. The surface morphology analysis, electrochemical impedance spectroscopy(EIS), and scanning electrochemical microscopy(SECM) were performed to evaluate the self-healing performance of the composite coatings. The results showed that the combination of NIR light and p H-responsive selfhealing effects endowed the coating with short healing time and prominent healing efficiency.

关键词： Self-healing coatings Corrosion inhibitors Photothermal effects pH-responsive Shape memory polymers

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An application-oriented efficient encapsulation system for trusted software development 7th

An application-oriented efficient encapsulation system for t...

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7th International Conference on the Theory, Technologies and Applications of Trusted Systems, INTRUST 2015

作者： Tao, Zheng Hu, Jun Zhan, Jing Li, Mo Chen, Chunzi College of Computer Science Beijing University of Technology Beijing100124 China Beijing Key Laboratory of Trusted Computing Beijing100124 China National Engineering Laboratory for Critical Technologies of Information Security Classified Protection Beijing100124 China

ISBN: (纸本)9783319315492

Trusted computing provides an efficient and practical way out for system security problems based on a trusted hardware, namely the root of trust, e.g., Trusted Platform Module (TPM), Trusted Cryptographic Module (TCM), Trusted Platform Control Module (TPCM), so on and so forth. However, current applications calling for trusted functions have to use either the user-space trusted interfaces (e.g., Trusted Software Stack (TSS) API) or to implement customized APIs on top of the trusted hardware driver;both of them are well known of steep learning curve, which indicates error prone and low-efficient development and complex maintenance for the application of trusted software. This paper presents a new trusted encapsulation architecture and the proof of-concept system with the aim to mitigate the gap between the current obscure trusted APIs and the actual trusted applications for trusted software development. Our system can provide high-level and much simplified trusted transaction interfaces for user applications, which can rapidly reduce the development and maintenance work for the developers and users without too much performance costs. We also present a secure remote login use-case using mainly the binding and unbinding trusted functions of our trusted encapsulation architecture. © Springer International Publishing Switzerland 2016.

关键词： Trusted computing

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New optimistic fair exchange protocol based on VE-RSA signature

New optimistic fair exchange protocol based on VE-RSA signat...

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2nd International Workshop on Education technology and Computer Science, ETCS 2010

作者： Gu, Lize Sun, Yanbin Information Security Center State Key Laboratory of Networking and Switching Technology Beijing 100876 China Key Laboratory of Network and Information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing 100876 China National Engineering Laboratory for Disaster Backup and Recovery Beijing 100876 China

ISBN: (纸本)9780769539874

Recently, Zhou et al. proposed a verifiably encrypted RSA (VE-RSA) signature scheme, which was used to convince that an encrypted message is a certain party's signature on a message while without revealing the signature. In this paper, we propose a new optimistic fair exchange protocol based on the verifiably encrypted RSA signature scheme. In our scheme, both parties can contact the TTP and settle the argument before the deadline. Moreover, our new scheme achieves fairness and timeliness. © 2010 IEEE.

关键词： Cryptography

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Multidimensional particle swarm optimization based long short-term memory method for human activity recognition 4

Multidimensional particle swarm optimization based long shor...

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4th IEEE International Conference on Computer and Communications, ICCC 2018

作者： Zuo, Peiliang Li, Haoliang Zhang, Yuanli Yang, Tao Ministry of Education Beijing University of Posts and Telecommunications Key Laboratory of Universal Wireless Communication Beijing China Department of Network Space Security Beijing Electronic Science and Technology Institute Beijing China

ISBN: (纸本)9781538683392

Human activity recognition (HAR) is indispensable for human-machine interaction. Related applications in many fields, e.g. medical, military, and security, facilitate and even change the lives of human beings. However, a key issue, i.e. the unsatisfactory recognition accuracy, still remains to be addressed. In this paper, we explore a new way to design a long short-term memory (LSTM) method specifically for HAR with datasets collected by sensors or mobile devices. In particular, combining with the multidimensional particle swarm optimization (MD-PSO), the LSTM method, which has advantages in processing collected datasets with timing characteristics, is not only optimized in terms of parameters (i.e. weights and bias), but also of the network topology as well as the number of blocks in each layer. In other words, we can further get the optimal topology and network mapping parameters of the LSTM network under the conditions of supervised learning. By utilizing the real dataset, performance of the proposed method is verified. Moreover, the test results show that our method significantly outperforms the commonly used support vector machine (SVM) and LSTM methods. © 2018 IEEE.

关键词： Support vector machines

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A mathematical approach to disaster recovery planning

A mathematical approach to disaster recovery planning

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1st International Conference on Semantics, Knowledge and Grid, SKG 2005

作者： Wang, Kun Yin, Zhonghai Yuan, Feng Zhou, Lihua Key Laboratory of Computer Network and Information Security Ministry of Education Xidian University Xi'an 710071 China National Info Security Engineering and Technology Research Center Beijing 100093 China

ISBN: (纸本)0769525342

It is crucial for highly security-critical information systems to accurately control the disaster recovery activities. Using optimization theory, we present a disaster recovery planning mathematical model. The model uses mathematical method to express diverse entities in information and disaster recovery system such as applications, facilities, resources, sub disaster recovery plans, budget, etc. It classifies various resources according to their utilization and payment, and identifies the significance of applications and the conflicts among sub disaster recovery plans. Through expressing relationships among applications, facilities, resources and sub plans, this model selects the best set of sub plans. This model has less subjective parameter and can evaluate disaster recovery planning objectively and quantitatively. © 2006 IEEE.

关键词： Information systems

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Study of secure complicated information system architecture model

Study of secure complicated information system architecture ...

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1st International Conference on Semantics, Knowledge and Grid, SKG 2005

作者： Wang, Kun Su, Ruidan Li, Zengxin Cai, Zhen Zhou, Lihua Key Laboratory of Computer Network and Information Security Ministry of Education Xidian University Xi'an 710071 China National Info Security Engineering and Technology Research Center Beijing 100093 China

ISBN: (纸本)0769525342

Complicated information system (CIS) contains many inhomogeneous applications which require security, interoperability, extensibility. The paper presents a secure CIS architecture model to conduct the construction or reconstruction of CIS, Using layered method, it divides CIS into modules and reduces system complexity. Web service technology is widely adopted in layers to fulfill interoperability and extensibility. It uses encryption support layer, security protection and reliability support layer to guarantee system security and stability in different aspects. It uses system management layer to make CIS administrable. It suits highly security-critical environment such as government and bank. Been properly simplified, it can be applied to relative simple information system too. © 2006 IEEE.

关键词： Information systems

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security on a knapsack-type encryption scheme based upon hybrid-model assumption

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International Journal of network security 2017年第4期19卷 644-647页

作者： Jin, Zhengping Zhang, Hong Li, Zhongxian State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China National Computer Network Emergency Response Technical Team Coordination Center of China Beijing100029 China National Cybernet Security Limited Tianjin300384 China

Provable security is a reduction that breaking the scheme is usually reduced to solving some basic hard problems, thus the foundation of the scheme's security is the assumption that it is hard to solve the based problems. Due to most existing schemes are founded on single assumption, some encryption schemes, whose security are based on multiple assumptions, have been proposed. Recently, Su and Tsai constructed a knapsack-type encryption scheme based on hybrid-model, and proved it should be more secure than schemes based on single assumption. In this paper, we find that this scheme actually cannot reach the security as claimed. By launching the known message attack, we show Su and Tsai's encryption scheme cannot provide confidentiality, for the adversary could decrypt any ciphertext in this cryptosystem if one of the assumptions does not hold.

关键词： Cryptography

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A novel key management method for wireless sensor networks

A novel key management method for wireless sensor networks

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2010 3rd IEEE International Conference on Broadband network and Multimedia technology, IC-BNMT2010

作者： Tian, Bin Xin, Yang Luo, Shoushan Yang, Xiou Li, Dong Gong, Zhe Yang, Yixian Information Security Center State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China Key Laboratory of Network and Information Attack and Defence Technology of MOE Beijing University of Posts and Telecommunications Beijing China Beijing Safe-Code Technology Co. Ltd. Beijing China

ISBN: (纸本)9781424467709

key management is one of the most important issues of any secure communication. With the increasing demand for the transmission security in wireless sensor networks (WSNs), it is urgent to introduce the secure and reliable key management scheme into the WSNs. In this paper, we proposed a hierarchical key management scheme to ensure the security of the network services and applications in WSN s. Comparing to the group key management protocol, our proposed method can save more computing and transmission energy through hierarchical design. Moreover, we improve the OFT(one-way hash function tree) by CRT(Chinese Remainder Theorem) so that it can be used in the large-scale WSN s. We designed some experiment to evaluate the security and performance of this method, and the experimental results show that the proposed method can achieve satisfying results. © 2010 IEEE.

关键词： Wireless sensor networks

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