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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

Effect of grain boundary on the mechanical behaviors of irradiated metals: a review

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Science China(Physics,Mechanics & Astronomy) 2016年第6期59卷 24-34页

作者： xia Zi xiao Hai Jian Chu Hui Ling Duan State Key Laboratory for Turbulence and Complex System Department of Mechanics and Engineering Science College of EngineeringPeking University HEDPS Center for Applied Physics and Technology Peking University Department of Mechanics and Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai University

The design of high irradiation-resistant materials is very important for the development of next-generation nuclear reactors. Grain boundaries acting as effective defect sinks are thought to be able to moderate the deterioration of mechanical behaviors of irradiated materials, and have drawn increasing attention in recent years. The study of the effect of grain boundaries on the mechanical behaviors of irradiated materials is a multi-scale problem. At the atomic level, grain boundaries can effectively affect the production and formation of irradiation-induced point defects in grain interiors, which leads to the change of density, size distribution and evolution of defect clusters at grain level. The change of microstructure would influence the macroscopic mechanical properties of the irradiated polycrystal. Here we give a brief review about the effect of grain boundaries on the mechanical behaviors of irradiated metals from three scales: microscopic scale, mesoscopic scale and macroscopic scale.

关键词： mechanical behaviors irradiation effect grain boundary multi-scale modeling

STUDY ON THE INTERACTION BETWEEN POLYVINYLPYRROLIDONE AND PLATINUM METALS DURING THE FORMATION OF THE COLLOIDAL METAL NANOPARTICLES

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Chinese Journal of Polymer Science 2008年第1期26卷 23-29页

作者： Tu, Wei-xia Zuo, xiao-bin Liu, Han-fan Beijing Inst Chem Technol Minist Educ Key Lab Nanomat Div Mol & Mat Simulat Beijing 100029 Peoples R China Chinese Acad Sci Inst Chem Beijing 100080 Peoples R China

Several PVP-stabilized colloidal platinum metals nanoparticles have been synthesized and characterized by FTIR and *** with the pure PVP,carbonyl groups of PVP in the mixture of PVP and the metal precursors or in the PVP-stabilized metal nanoparticles have obvious peak shifts in FTIR *** peak shifts reveal the interaction between PVP and the metal *** interaction between PVP and metal precursors has effect on the formation of the colloidal metal *** of the intera...

关键词： Colloidal metal nanoparticles Metal precursor PVP Interaction

Surface reaction of Bacillus cereus biomass and its biosorption for lead and copper ions

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Journal of Environmental Sciences 2007年第4期19卷 403-408页

作者： PAN Jian-hua LIU Rui-xia TANG Hong-xiao State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China.

In this study, the surface chemical functional groups of Bacillus cereus biomass were identified by Fourier transform infrared （FTIR） analytical technique. It had been shown that the B. cereus cells mainly contained carboxyl, hydroxyl, phosphate, amino and amide functional groups. The potentiometric titration was conducted to explain the surface acid-base properties of aqueous B. cereus biomass. The computer program FITEQL 4.0 was used to perform the model calculations. The optimization results indicated that three sitesthree pKas model, which assumed the cell surface to have three distinct types of surface organic functional groups based on the IR analysis results, simulated the experimental results very well. Moreover, batch adsorption experiments were performed to investigate biosorption behavior of Cu（Ⅱ） and Pb（Ⅱ） ions onto the biomass. Obviously, the adsorption equilibrium data for the two ions were reasonably described by typical Langmuir isotherm.

关键词： Bacillus cereus biosorption Fourier transform infrared (FTIR) acid-base characteristic heavy metals

Thermal decomposition effect of MgCo_(2)O_(4)nanosheets on ammonium perchlorate-based energetic molecular perovskites

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Defence Technology（防务技术） 2023年第2期20卷 111-119页

作者： Er-hai An xiao-xia Li Hai-xia Zhao Ying-xin Tan Xiong Cao Peng Deng School of Environment and Safety Engineering North University of ChinaTaiyuan030051ShanxiPeople's Republic of China School of Engineering for Safety and Emergency Management Taiyuan University of Science and TechnologyTaiyuan030024China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081People's Republic of China

Energetic molecular perovskites have attracted widespread attention in the fields of energy materials due to their high detonation *** this work,we reported the effect of MgCo_(2)O_(4) nanosheets on the thermal decomposition of ammonium perchlorate(NH_(4)ClO_(4),AP)-based energetic molecular perovskites(AP-based energetic molecular perovskites).The morphology and structure of the MgCo_(2)O_(4) nanosheets were *** their catalytic effect on the thermal decomposition of AP-based energetic molecular perovskites(H_2pz)[NH_(4)(ClO_(4))_(3)](PAP-4),(H_2dabco)[NH_(4)(ClO_(4))_(3)](DAP-4),(H_2mpz)[NH_(4)(ClO_(4))_(3)](PAP-M_(4)),and (H_2hpz)[NH_(4)(ClO_(4))_(3)](PAP-H_(4)) was *** results showed that MgCo_(2)O_(4) nanosheets had excellent intrinsically catalytic performance towards enhancing the thermal decomposition of AP-based energetic molecular *** adding MgCo_(2)O_(4) nanosheets,the thermal decomposition peak temperatures of PAP-4,DAP-4,PAP-M_(4),and PAP-H_(4) had been reduced by35.7℃,48.4℃,37.9℃,and 43.6℃,*** the activation energy(Ea)of the thermal decomposition of AP-based energetic molecular perovskites had been reduced,the Eaof PAP-H_(4) decreased by 46.4 kJ/mol at most among *** catalytic mechanism of MgCo_(2)O_(4) nanosheets for AP-based energetic molecular perovskites is *** work provides a reference for the future application of AP-based energetic molecular perovskites.

关键词： AP-based energetic molecular perovskites MgCo_(2)O_(4)nanosheets Thermal decomposition Catalytic performance

Dietary supplementation of sodium butyrate enhances lactation performance by promoting nutrient digestion and mammary gland development in dairy cows

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Animal Nutrition 2023年第4期15卷 137-148页

作者： Jing Zhang Lijun Bu Yapeng Liu Wenjie huo Chengqiang xia Caixia Pei Qiang Liu College of Animal Sciences Shanxi Agricultural UniversityTaigu 030801China

This experiment was to evaluate the influence of sodium butyrate(SB)addition on milk production,ruminal fermentation,nutrient digestion,and the development and metabolism regulation of the mammary gland in dairy *** Holstein dairy cows averaging 710±18.5 kg body weight,72.8±3.66 d in milk(DIM),and 41.4±1.42 kg/d milk production were divided into four treatments blocked by DIM and milk *** were control group,low SB,medium SB,and high SB with 0,100,200 and 300 g/d of SB addition per cow,*** study lasted for 105 *** of milk,milk protein and lactose quadratically increased(P<0.05),while fat-corrected milk,energycorrected milk and milk fat yields linearly increased(P<0.05)with increasing SB *** digestibility of dietary dry matter,organic matter,and crude protein linearly increased(P<0.05),whereas the digestibility of ether extract,neutral detergent fibre,and acid detergent fibre quadratically increased(P<0.05).Ruminal pH quadratically decreased(P=0.04),while total volatile fatty acids(VFA)quadratically increased(P=0.03)with increasing SB *** acetic acid to propionic acid ratio increased(P=0.03)linearly due to the unaltered acetic acid molar percentage and a linear decrease in propionic acid molar *** enzymatic activity of carboxymethyl-cellulase and a-amylase,populations of total bacteria,total anaerobic fungi,total protozoa,Ruminococcus albus,***,Butyrivibrio fibrisolvens,Fibrobacter succinogenes,and Ruminobacter amylophilus linearly increased(P<0.05).Blood glucose,urea nitrogen,and non-esterified fatty acids linearly decreased(P<0.05),while total protein concentration linearly increased(P=0.04).Moreover,the addition of SB at 200 g/d promoted(P<0.05)mRNA and protein expression of PPARγ,SREBF1,ACACA,FASN,SCD,CCNA2,CCND1,PCNA,Bcl-2,GPR41,and the ratios of p-Akt/Akt and p-mTOR/mTOR,but decreased(P<0.05)mRNA and protein expressions of Bax,caspase-3,and *** results suggest th

关键词： Sodium butyrate Lactation performance Nutrient digestion Milk fat synthesis Mammary gland development

Influences of lauric acid addition on performance,nutrient digestibility and proteins related to mammary gland development in dairy cows

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Animal Nutrition 2024年第3期18卷 272-283页

作者： Jing Zhang Lijun Bu Yapeng Liu Wenjie huo Chengqiang xia Caixia Pei Qiang Liu College of Animal Science Shanxi Agricultural UniversityTaigu 030801Shanxi ProvinceChina

Lauric acid(LA)has the possibility to improve milk production in dairy cows by improving mammary gland development,however,the mechanism by which it might regulate mammary gland development is *** influence of LA on milk production,nutrient digestibility and the expression of proteins related to mammary gland development in dairy cows were *** primiparous Holstein dairy cows were divided into 4 groups in a randomized block *** treatments included the control(0 g/d LA per cow),low-LA(100 g/d LA per cow),medium-LA(200 g/d LA per cow),and high-LA(300 g/d LA per cow).Yields of milk,fat-corrected milk,and energy-corrected milk quadratically increased(P<0.05),and yield and content of milk fat linearly increased(P<0.05)with LA *** of C12:0,C18:1 and C20:1 fatty acids in milk fat linearly increased(P<0.05),but that of C16:0 fatty acid linearly decreased(P=0.046).Supplementation of LA led to a linear and quadratical increase(P<0.05)in digestibility of dry matter,organic matter,neutral detergent fibre and acid detergent fibre,and ruminal total volatile fatty acid concentration but a linear reduction(P=0.018)in the ratio of acetate to *** enzymatic activities of ruminal pectinase,xylanase,andα-amylase,and populations of total bacteria and anaerobic fungi increased linearly(P<0.05),while populations of total protozoa and methanogens decreased linearly(P<0.05)with increased LA *** LA addition,blood glucose,triglyceride,estradiol,prolactin,and insulin-like growth factor 1 concentrations increased linearly(P<0.05)and albumin and total protein concentrations increased quadratically(P<0.05).Moreover,addition of 200 g/d LA promoted(P<0.05)the expression of protein involved in mammary gland development and fatty acids *** results suggested that LA addition enhanced milk production and fatty acids synthesis by stimulating nutrient digestion,the expression of proteins associated with milk fat synth

关键词： Lactation performance Lauric acid Mammary gland development Milk fat synthesis Nutrient digestibility

Confining sulfur in sandwich structure of bamboo charcoal and aluminum fluoride(BC@S@AlF3) as a long cycle performance cathode for Li-S batteries

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Journal of Materials Science & Technology 2020年第20期52卷 159-166页

作者： Zhenya Luo xiao Wang Weixin Lei Pengtao xia Yong Pan National-Provincial Laboratory of Special Function Thin Film Materials Xiangtan UniversityXiangtanHunan 411105China School of Materials Science and Engineering Xiangtan UniversityXiangtanHunan 411105China

The ’shuttle effect’ of polysulfide causing rapid capacity fade and low coulo mbic efficiency of high ene rgy storage lithium-sulfur(Li-S) ***,a sandwich structure of bamboo charcoal/sulfur coating by aluminum fluoride(BC@S@AlF3) composites is designed and fabricated for the first *** as-designed cathode exhibited excellent electrochemical properties and stable capacity *** initial capacity reaches 1119 mA h/g and the capacity after 100 cycles is 869 mA h/g at 0.5 C,which is much stable than that of composite materials without bamboo charcoal or AlF3 ***,the BC@S@AlF3 cathode presents excellent long-term capacity stability with a capacity decay of 0.073% per cycle during 500 charge/discharge cycles at 1 C,offering a potential for use in high energy Li-S *** physical confinement,chemical ancho ring,and catalysis conversion for active sulfur are achieved simultaneously with the AlF3 coating and bamboo charcoal core with porous structure.

关键词： AlF3 coating Strong polarity Sulfur immobilizers Lithium-sulfur batteries

Dynamic Recrystallization of Hot Deformed 3Cr2NiMnMo Steel:Modeling and Numerical Simulation

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Journal of Iron and Steel Research International 2013年第11期20卷 98-104页

作者： LI xia WU xiao-chun ZHANG xiao-xun LI Ming-yao School of Materials Science and Engineering Shanghai University School of Materials Engineering Shanghai University of Engineering Science

Hot compression tests of 3Cr2NiMnMo steel were performed at temperatures in the range of 850 to 1 100 ℃ and with strain rates of 10 ^-2 s^- 1 to 1 s ^-1. Both the constitutive equations and the hot deformation activation energy were derived from the correlativity of flow stress, strain rate and temperature. The mathematical models of the dynamic recrystaIiization of 3Cr2NiMnMo steel, which inelude the dynamic recrystallization kinetics model and the crystalliza- tion grain size model, are based on Avrami＇s law and the results of thermosimulation experiments. By integrating de- rived dynamic recrystallization models with the thermal mechanical coupled finite element method, the microstruc ture evolution in hot compressive deformation was simulated. The distribution of dynamic recrystallization grains and grain sizes were determined through a comparison of the simulation results with the experimental results. The distri- bution of strain and dynamic recrystallization grain is also discussed. The similarity between the experimental results and the simulated results indicates that the derived dynamic recrystallization models can be applied effectively to pre diet and analyze the microstructure evolution in hot deformed 3Cr2NiMnMo steel.

关键词： dynamic recrysta[hzation 3Cr2NiMnMo steel hot forming microstructure evolution numerical simulation