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Science China(Technological Sciences) 2023年第2期66卷 468-480页

作者： yao lan HUANG Xia College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China

In this article,we study the secure control of the Markovian jumping neural networks(MJNNs)subject to deception *** the limitation of the network bandwidth and the impact of the deception attacks,we propose two memory-based adaptive event-trigger mechanisms(AETMs).Different from the available event-trigger mechanisms,these two memory-based AETMs contain the historical triggered data not only in the triggering conditions,but also in the adaptive *** can adjust the data transmission rate adaptively so as to alleviate the impact of deception attacks on the controlled system and to suppress the peak of the system *** view of the proposed memory-based AETMs,a time-dependent Lyapunov functional is constructed to analyze the stability of the error *** sufficient conditions to ensure the asymptotical synchronization of master-slave MJNNs are obtained,and two easy-to-implement co-design algorithms for the feedback gain matrix and the trigger matrix are ***,a numerical example is given to verify the feasibility and superiority of the two memory-based AETMs.

关键词： secure control memory-based adaptive event-trigger mechanism globally asymptotical synchronization deception attacks

EARS: Intelligence-Driven Experiential Network Architecture for Automatic Routing in Software-Defined Networking

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China Communications 2020年第2期17卷 149-162页

作者： Yuxiang Hu Ziyong Li Julong lan Jiangxing Wu lan yao Information Engineering University

Software-Defined Networking(SDN)adapts logically-centralized control by decoupling control plane from data plane and provides the efficient use of network ***,due to the limitation of traditional routing strategies relying on manual configuration,SDN may suffer from link congestion and inefficient bandwidth allocation among flows,which could degrade network performance *** this paper,we propose EARS,an intelligence-driven experiential network architecture for automatic *** adapts deep reinforcement learning(DRL)to simulate the human methods of learning experiential knowledge,employs the closed-loop network control mechanism incorporating with network monitoring technologies to realize the interaction with network *** proposed EARS can learn to make better control decision from its own experience by interacting with network environment and optimize the network intelligently by adjusting services and resources offered based on network requirements and environmental *** the network architecture,we design the network utility function with throughput and delay awareness,differentiate flows based on their size characteristics,and design a DDPGbased automatic routing algorithm as DRL decision brain to find the near-optimal paths for mice and elephant *** validate the network architecture,we implement it on a real network *** simulation results show that EARS significantly improve the network throughput and reduces the average packet delay in comparison with baseline schemes(***,ECMP).

关键词： software-defined networking(SDN) intelligence-driven experiential network deep reinforcement learning(DRL) automatic routing

Security control of Markovian jump neural networks with stochastic sampling subject to false data injection attacks

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Communications in Theoretical Physics 2023年第10期75卷 146-154页

作者： lan yao Xia Huang Zhen Wang Min Xiao College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China College of Automation Nanjing University of Posts and TelecommunicationsNanjing 210003China

The security control of Markovian jumping neural networks(MJNNs)is investigated under false data injection attacks that take place in the shared communication *** sampleddata control is employed to research the exponential synchronization of MJNNs under false data injection attacks(FDIAs)since it can alleviate the impact of the FDIAs on the performance of the system by adjusting the sampling periods.A multi-delay error system model is established through the input-delay *** reduce the conservatism of the results,a sampling-periodprobability-dependent looped Lyapunov functional is *** light of some less conservative integral inequalities,a synchronization criterion is derived,and an algorithm is provided that can be solved for determining the controller ***,a numerical simulation is presented to confirm the efficiency of the proposed method.

关键词： Markovian jumping neural networks stochastic sampling looped-functional false data injection attack

Dependences of longleaf pine(Pinus palustris) natural reproduction on environments above ground

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Journal of Forestry Research 2014年第3期25卷 565-570页

作者： Qiuju Guo Dexiang Wang Xunru Ai lan yao College of Forestry and Horticulture Hubei University for Nationalities College of Forestry Northwest A&F University

We studied relations between natural seedling reproduction and above ground environment in a longleaf pine ecosystem. Forty-eight 0.05 ha circular plots were sampled under single-tree selection, group-tree selection and control stands in three main longleaf pine areas in south Alabama, USA. We measured six above-ground environment factors, viz. canopy closure, stand density, basal area, average tree height, understory cover and PAR under canopy. We employed forward, back-ward and stepwise selection regression to produce one model. Three main variables：canopy closure, stand density and basal area, were left in the model; light, PAR and understory cover were not incorporated into the model at the 0.10 significance level. Basal area was a positive pa-rameter, while canopy closure and stand density were negative parame-ters. Canopy closure was the main parameter in the model. The model proved to be meaningful, and has potential to provide useful guidance for future work.

关键词： seedling reproduction number selection regression analysis model

Sparse Support Vector Machine with Lp Penalty for Feature Selection

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Journal of Computer Science & Technology 2017年第1期32卷 68-77页

作者： lan yao Feng Zeng Dong-Hui Li Zhi-Gang Chen College of Mathematics and Econometrics Hunan University Changsha 410082 China School of Software Central South University Changsha 410083 China School of Mathematical Sciences South China Normal University Guangzhou 510631 China

We study the strategies in feature selection with sparse support vector machine （SVM）. Recently, the socalled Lp-SVM （0 〈 p 〈 1） has attracted much attention because it can encourage better sparsity than the widely used L1-SVM. However, Lp-SVM is a non-convex and non-Lipschitz optimization problem. Solving this problem numerically is challenging. In this paper, we reformulate the Lp-SVM into an optimization model with linear objective function and smooth constraints （LOSC-SVM） so that it can be solved by numerical methods for smooth constrained optimization. Our numerical experiments on artificial datasets show that LOSC-SVM （0 〈 p 〈 1） can improve the classification performance in both feature selection and classification by choosing a suitable parameter p. We also apply it to some real-life datasets and experimental results show that it is superior to L1-SVM.

关键词： machine learning feature selection support vector machine Lp-regularization

Phase Portraits and Flow Regimes in a Circular Couette System with Counter-Rotating Cylinders

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Chinese Physics Letters 1991年第1期8卷 9-12页

作者： LIU Shusheng SHA Ernan yao lan WANG Mingtan Department of Physics Tianjin UniversityTianjin 300072 Institute of Theoretical Physics Academia SinicaBeijing 100080

Experiments have been conducted on the circular Couette system,established recently in our *** using ***-electronic modulation feedback Laser Doppler Velocimetry technique,the velocity time series data with higher signal-noise ratio,power spectra,phase portraits and Poincare sections were *** scenarios to chaos were *** is the Ruelle-Takens scenario,while the other(when both cylinders of the Couette system are counter-rotating)is quite different from it,A tremendous variety of flow regimes and a new state were observed.A tentative explanation is made for the new state.

关键词： state Couette system

Template-assisted synthesis of hierarchically porous Co3O4 with enhanced oxygen evolution activity

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Journal of Energy Chemistry 2016年第1期25卷 153-157页

作者： lan yao Hexiang Zhong Chengwei Deng Xianfeng Li Huamin Zhang Division of Energy Storage Dalian National Laboratory for Clean Energy (DNL) Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China Graduate University of the Chinese Academy of Sciences Beijing 100049 China Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Dalian 116023 Liaoning China

Oxygen evolution reaction（OER） is one of the most important reactions in the energy storage devices such as metal–air batteries and unitized regenerative fuel cells（URFCs）. However, the kinetically sluggishness of OER and the high prices as well as the scarcity of the most active precious metal electrocatalysts are the major bottleneck in these devices. Developing low-cost non-precious metal catalysts with high activity and stability for OER is highly desirable. A facile, in situ template method combining the dodecyl benzene sulfuric acid sodium（SDBS） assisted hydrothermal process with subsequent high-temperature treatment was developed to prepare porous Co3O4 with improved surface area and hierarchical porous structure as precious catalysts alternative for oxygen evolution reaction（OER）. Due to the unique structure, the as-prepared catalyst shows higher electrocatalytic activity than Co3O4 prepared by traditional thermal-decomposition method（noted as Co3O4-T） and commercial IrO2 catalyst for OER in 0.1M KOH aqueous solution. Moreover, it displays improved stability than Co3O4-T. The results demonstrate a highly efficient, scalable, and low cost method for developing highly active and stable OER electrocatalysts in alkaline solutions.

关键词： Oxygen evolution reaction Co3O4 Non-precious metal catalysts High activity High stability

Inspections and Information Disclosure： Quality Regulations with Incomplete Enforcement

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Frontiers of Economics in China-Selected Publications from Chinese Universities 2014年第2期9卷 240-260页

作者： Liguo Lin lan yao School of Economics Key Laboratory of Mathematical Economics (MOE) Shanghai Univer-sity of Finance and Economics Shanghai 200433 China

The weak enforcement and monitoring systems employed in China （e.g., insufficient inspection resources and negligible fines for noncompliance） are widely blamed for the growing unrest over food safety in the country. Given this development, we consider a model where quality inspection performed by agencies is a means of disclosing information on product quality. We analyze the price-quality equilibrium scheme and show that a higher probability of inspection leads to lower price premiums attached to qualified products. We further investigate the welfare effect of minimum quality standards and inspection efforts and show that they should be complementary. We finally suggest that a state dependent inspection strategy, such as not inspecting those firms that have previously been found to be noncompliant, will enhance social welfare.

关键词： food safety information disclosure quality regulation incomplete en- forcement

The Frost-resisting Durability of High Strength Self-Compacting Pervious Concrete in Deicing Salt Environment

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Journal of Wuhan University of Technology(Materials Science) 2020年第1期35卷 167-175页

作者：封金财 ZONG Ningwen ZHU Pinghua 刘惠 yao lan GENG Jiang Department of Civil Engineering Changzhou UniversityChangzhou 213164China

A high strength self-compacting pervious concrete(SCPC) with top-bottom interconnected pores was prepared in this paper. The frost-resisting durability of such SCPC in different deicing salt concentrations(0%, 3%, 5%, 10%, and 20%) was investigated. The mass-loss rate, relative dynamic modulus of elasticity, compressive strength, flexural strength and hydraulic conductivity of SCPC after 300 freeze-thaw cycles were measured to evaluate the frost-resisting durability. In addition, the microstructures of SCPC near the top-bottom interconnected pores after 300 freeze-thaw cycles were observed by SEM. The results show that the high strength SCPC possesses much better frost-resisting durability than traditional pervious concrete(TPC) after 300 freeze-thaw cycles, which can be used in heavy loading roads. The most serious freeze-thaw damage emerges in the SCPC immersed in the 3% of Na Cl solution, while there is no obvious damage in 20% of Na Cl solution. Furthermore, it can be deduced that the high strength SCPC can be used for 100 years in a cold environment.

关键词： high strength self-compacting pervious concrete top-bottom interconnected pores heavy loading road frost-resisting durability deicing salt environment

Failure mechanism and control technology of water-immersed roadway in high-stress and soft rock in a deep mine

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International Journal of Mining Science and Technology 2017年第2期27卷 245-252页

作者： Yang Renshu Li Yongliang Guo Dongming yao lan Yang Tongmao Li Taotao School of Mechanics and Architecture Engineering China University of Mining and TechnologyBeijing 100083China State Key Laboratory for Geomechanics and Deep Underground Engineering Beijing 100083China Faculty of Resources and Safety Engineering China University of Mining and TechnologyBeijing 100083China

Aiming at soft rock ground support issues under conditions of high stress and long-term water immersion, the ground failure mechanism is revealed by taking the deep-water sumps of Jiulong Mine as the engineering background and employing field investigation, tests of rock structure, mechanical properties and mineral composition. The main factors leading to the surrounding rock failure include the high and complex stress state of the water sumps, high-clay content and water-weakened rock, and the unreasonable support design. In this paper, the broken and fractured rock mass near roadway opening is considered as ground small-structure, and deep stable rock mass as ground large-structure. A support technology focusing on cutting off the water, strengthening the small structure of the rock and transferring the large structure of the rock is proposed. The proposed support technology of interconnecting the large and small structures, based on high-strength bolts, high-stiffness shotcrete layer plugging water,strengthening the small structure with deep-hole grouting and shallow-hole grouting, highpretensioned cables tensioned twice to make the large and small structures bearing the pressure evenly,channel-steel and high-pretensioned cables are used to control floor heave. The numerical simulation and field test show that this support system can control the rock deformation of the water sumps and provide technical support to similar roadway support designs.

关键词： High stress and soft rock Water immersion Failure mechanism Large and small structures Rework control