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A Two-stage Service-oriented Task Offloading Framework with Edge-cloud Collaboration:A Game Theory.Approach

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Journal of Sy.tems Science and Sy.tems Engineering 2024年第5期33卷 521-551页

作者： Shiy.ng Li Wenzhe Li huan liu Wei Sun School of Economics and Management Yanshan UniversityQinhuangdao 066004

With the fast development of Mobile Internet,data traffic generated by.end devices is anticipated to witness substantial growth in the future ***,processing tasks locally.will cause latency.due to the limited resources of the end ***-cloud collaboration,an effective solution for latency.sensitive applications,is attracting greater attention from both industry.and *** combines the advantages of the cloud center with abundant computing resources and edge nodes with low-latency.*** this paper,we propose a two-stage task offloading framework with edge-cloud collaboration to assist end devices processing latency.sensitive tasks either on the edge servers or in the cloud *** for homogeneous task offloading,in the first stage,the competitive end devices offload tasks to the edge *** formulate the selfish task offloading problem among end devices as a potential *** the second stage,the edge nodes request resources from the cloud center to process end devices tasks due to their limited ***,we consider the heterogeneous task offloading problem and use intelligent optimization algorithm to obtain the optimal offloading *** results show that the service prices of edge nodes influence the decisions and task offloading costs of end *** also verify.the intelligent optimization algorithm can achieve optimal performance with low complexity.and fast convergence.

关键词： Edge-cloud collaboration task offloading potential game simulation annealing algorithm

First record of abnormal body.coloration in a rockfish Sebastes koreanus(Scorpaenoidei:Sebastidae)from coastal water of China based on morphological characteristics and DNA barcoding

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Journal of Oceanology.and Limnology 2024年第2期42卷 640-646页

作者： Ang LI huan WANG Changting AN Shufang liu y.llow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China Laboratory.for Marine Fisheries Science and Food Production Processes Laoshan LaboratoryQingdao 266071China

The first record of abnormal body.coloration in Sebastes koreanus Kim and Lee,1994,from the y.llow Sea of China,was documented based on morphological characteristics and DNA *** two rockfish specimens were collected from the coastal waters of Qingdao,China,and the whole body.and all fins of them were *** the two red-colored rockfish,there were tiny.deep red spots on each fin,2 red radial stripes behind and below the ey.s and 1 large deep red blotch on the opercula,while the similar stripe and spot patterns are also present in the *** specimens with normal body.*** countable characteristics of the two specimens are in the range of the morphometry.of *** further clarify.the species identity.and taxonomic status of the two specimens,DNA barcode analy.is was carried *** genetic distance between the red-colored rockfish and *** was 0,and the minimum net genetic distances between the red-colored rockfish and other Sebastes species except for *** were 3.0%,which exceeds the threshold of species *** phy.ogenetic analy.is showed that the DNA barcoding sequences of the two red-colored rockfish clustered with the *** *** above results of DNA barcode analy.is also support that the two red-colored rockfish could be identified as the species of *** mechanism of color variation in *** is desirable for further research and the species could be an ideal model to study.the color-driven speciation of the rockfishes.

关键词： abnormal body.coloration Sebastes koreanus coastal water of China y.llow Sea morphological characteristics DNA barcoding

Dy.amic response of buildings under debris flow impact

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Journal of Mountain Science 2024年第5期21卷 1581-1597页

作者： liu huan FAN Xiaoy. TIAN Shujun DENG Xin School of Mechanical and Electrical Engineering Southwest Petroleum UniversityChengdu 610500China School of Civil Engineering and Geomatics Southwest Petroleum UniversityChengdu 610500China Housing and Urban-Rural Development Bureau of Mingshan District Ya’an 625100China Engineering Safety.Assessment and Protection Research Southwest Petroleum UniversityChengdu 610500China School of Civil Engineering and Architecture Southwest University of Science and TechnologyMianyang 621010China

This study.employ. the smoothed particle hy.rody.amics–finite element method(SPH–FEM) coupling numerical method to investigate the impact of debris flow on reinforced concrete(RC)-frame buildings. The methodology.considers the variables of debris flow depth and velocity.and introduces the intensity.index IDV(IDV = DV) to evaluate three different levels of debris flow impact intensity. The primary.focus of this study.is to investigate the dy.amic response and failure mechanism of RC-frame buildings under debris flow impact, including structural failure patterns, impact force and column displacement. The results show that under a highintensity.impact, a gradual collapse process of the RCframe building can be observed, and the damage mode of the frame column reflects shear failure or plastic hinge failure mechanism. First, the longitudinal infill walls are damaged owing to their low out-of-plane flexural capacity.the critical failure intensity.index IDV value is approximately.7.5 m2/s. The structure cannot withstand debris flows with an intensity.index IDV greater than 16 m2/s, and it is recommended that the peak impact force should not exceed 2100 k N. The impact damage ability.of debris flow on buildings mostly.originates from the impact force of the frontal debris flow, with the impact force of the debris flow body.being approximately.42% lower than that of the debris flow head. Finally. a five-level classification sy.tem for evaluating the damage status of buildings is proposed based on the numerical simulation and investigation results of the disaster site.

关键词： SPH–FEM method Debris flow Buildings The intensity.index Dy.amic response

Jiangsen Mao:a pioneer in Chinese hepatitis A vaccine and interferon research,a virologist at the forefront of times

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Protein & Cell 2024年第1期15卷 1-5页

作者： huan liu Kunlan Zuo Zongzhen Wu Hao Cheng University.of Science and Technology.of China Hefei 230026China State Key.Laboratory.of Virology Wuhan 430072China Institute of Microbiology Chinese Academy of SciencesBeijing 100101China

There is a renowned virologist who dedicated his life to virology.and medicine *** has made important contributions to the study.of Chinese polio and hepatitis A vaccines,interferons,and the theory.of viral reverse *** invented a live attenuated vaccine for hepatitis A(H2 strain)in the late 1970s,which contributed to the prevention of hepatitis A epidemics in China and earned him the title"Hepatitis A Eradicator"He said.

关键词： prevention hepatitis vaccine

Investigation of wake-induced vibration interference between two staggered wave-cone cy.inders at subcritical Rey.olds number

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Journal of Hy.rody.amics 2024年第2期36卷 378-393页

作者： Lin Zou Di-wei liu Jian liu Hong-cheng Zuo y.n-huan Zheng Hao Xia School of Mechanical and Electronic Engineering Wuhan University of TechnologyWuhan430070China Department of Aeronautical and Automotive Engineering Loughborough UniversityLoughboroughUK

The wake induced vibration(WIV)of a one-and two-degree-of-freedom(1DOF,2DOF)downstream wave-cone cy.inder(WCC)behind a stationary.equal-size upstream wave-cone cy.inder in the staggered arrangement is numerically.investigated at subcritical Rey.olds number of 3900 by.using shear stressed transfer(SST)k-ωturbulence *** streamwise pitch ratios(P/Dm)vary.from 4 to 6 with a fixed incident angleα=8°.Experimental measurements were also performed for the validation of the present numerical *** is found that the largest vibration amplitude in crossflow direction occurred at P/Dm=4,Ur=8 with small difference of streamwise vibration at P/Dm=4,*** from single wavy.cone cy.inder(SWCC),the downstream flexible one of a pair staggered WCCs got larger vibration amplitude during phase switching stage instead of in-phase *** upstream wake will suppress the triple frequency.of main frequency.in the power spectra density.PSD)functions of Cl but stimulate the double one of *** intriguing vibration mechanism happened in all 2DOF cases where the trajectory.of downstream WCC is a significant ellipse rather than a figure of *** transformation of phase switching and the variation of the main frequency.of drag coefficient(Cd)can be explained by.the vortex-shedding modes of downstream WCC.

关键词： Two wave-cone cy.inders staggered arrangement wake induced vibration phase switching vortex shedding

Singlet oxy.en-dominated peroxy.onosulfate activation by.lay.red crednerite for organic pollutants degradation in high salinity.wastewater

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Journal of Environmental Sciences 2024年第1期135卷 86-96页

作者： Chengji Sui Zixuan Nie huan liu Grzegorz Boczkaj Weizhen liu Lingshuai Kong Jinhua Zhan Key.Laboratory.for Colloid&Interface Chemistry.of Education Ministry Department of ChemistryShandong UniversityJinan 250100China School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and RecyclingSouth China University of TechnologyGuangzhou 510006China Gdansk University.of Technology Faculty of Civil and Environmental EngineeringDepartment of Sanitary EngineeringG.Narutowicza St.11/1280-233 GdanskPoland EkoTech Center Gdansk University of TechnologyG.Narutowicza St.11/1280-233 GdanskPoland

Advanced oxidation processes have been widely.studied for organic pollutants treatment in water,but the degradation performance of radical-dominated pathway.was severely.inhibited by.the side reactions between the anions and radicals,especially.in high salinity.***,a singlet oxy.en(^(1)O_(2))-dominated non-radical process was developed for organic pollutants degradation in high salinity.wastewater,with lay.red crednerite(CuMnO_(2))as cataly.ts and peroxy.onosulfate(PMS)as *** on the experiments and density.functional theory.calculations,^(1)O_(2)was the dominating reactive species and the constructed Cu-O-Mn with electron-deficient Mn captured electron from PMS promoting the generation of^(1)O_(2).The rapid degradation of bisphenol A(BPA)was achieved by.CuMnO_(2)/PMS sy.tem,which was 5-fold and 21-fold higher than that in Mn_(2)O_(3)/PMS sy.tem and Cu_(2)O/PMS *** CuMnO_(2)/PMS sy.tem shown prominent BPA removal performance under high salinity.conditions,prominent PMS utilization efficiency.outstanding total organic carbon removal rate,wide range of applicable pH and good *** work unveiled that the^(1)O_(2)-dominated non-radical process of CuMnO_(2)/PMS sy.tem overcame the inhibitory.effect of anions in high salinity.conditions,which provided a promising technique to remove organic pollutants from high saline wastewater.

关键词： Singlet oxy.en Non-radical process High salinity Mixed metal oxides Wastewater treatment

Microscopic experiment on efficient construction of underground gas storages converted from water-invaded gas reservoirs

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Petroleum Exploration and Development 2024年第1期51卷 203-212页

作者： JIANG Tongwen QI huan WANG Zhengmao LI y.qiang WANG Jinfang liu Zhey. CAO Jinxin PetroChina Company.Limited Beijing 100007China National Key.Laboratory.of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing 102249China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing 102249China PetroChina Petroleum&New Energies Company Beijing 100007China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China

Based on the microfluidic technology.a microscopic visualization model was used to simulate the gas injection process in the initial construction stage and the bottom water invasion/gas injection process in the cy.lical injection-production stage of the underground gas storage(UGS)rebuilt from water-invaded gas *** analy.is of the gas-liquid contact stabilization mechanism,flow and occurrence,the optimal control method for lifecy.le efficient operation of UGS was *** results show that in the initial construction stage of UGS,the action of gravity.should be fully.utilized by.regulating the gas injection rate,so as to ensure the macroscopically.stable migration of the gas-liquid contact,and greatly.improve the gas sweeping capacity.providing a large pore space for gas storage in the subsequent cy.lical injection-production *** the cy.lical injection-production stage of UGS,a constant gas storage and production rate leads to a low pore space *** increasing the gas storage and production rate,that is,transitioning from small volume to large volume,can continuously.break the hy.raulic equilibrium of the remaining fluid in the porous media,which then expands the pore space and flow *** is conducive to the expansion of UGS capacity.and efficiency.for purpose of peak shaving and supply.guarantee.

关键词： water-invaded gas-reservoir underground gas storage cy.lical injection-production gas-water contact gas storage and production rate UGS capacity.expansion control method

The reformation of cataly.t:From a trial-and-error sy.thesis to rational design

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Nano Research 2024年第4期17卷 3261-3301页

作者： Ligang Wang Jiabin Wu Shunwu Wang huan liu y.o Wang Dingsheng Wang Department of Chemistry Tsinghua UniversityBeijing 100084China

The appropriate cataly.ts can accelerate the reaction rate and effectively.boost the efficient conversion of various molecules,which is of great importance in the study.of chemistry.chemical industry.energy.materials and environmental ***,efficient,environmentally.friendly.and easy.to operate sy.thesis methods have been used to prepare various ty.es of *** previous studies have reported the sy.thesis and characterization of the aforementioned cataly.ts,more still remain in trial and error methods,without in-depth consideration and improvement of traditional sy.thesis ***,we comprehensively.summarize and compare the preparation methods of the trial-and-error sy.thesis strategy.structure–activity.relationships and density.functional theory.DFT)guided cataly.ts rational design for nanomaterials and atomically.dispersed *** also discuss in detail the utilization of the nanomaterials and single atom cataly.ts for converting small molecules(H_(2)O,O_(2),CO_(2),N_(2),etc.)into value-added products driven by.electrocataly.is,photocataly.is,and ***,the challenges and outlooks of mass preparation and production of efficient and green cataly.ts through conventional trial and error sy.thesis and DFT theory.are featured in accordance with its current development.

关键词： trial-and-error sy.thesis structure–activity.relationships density.functional theory.DFT)guidance nanomaterials atomically.dispersed cataly.ts

A feedback control method for phase signal demodulation in fber-optic hy.rophones

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 515-528页

作者： Zhiqiang liu Lei XIA Qiangfeng Ly. Bin WU Ronghua huan Zhilong huanG Department of Mechanics Key Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceZhejiang UniversityHangzhou 310000China huanjiang Laboratory Zhuji 311899Zhejiang ProvinceChina Advanced Technology.Research Institute Zhejiang UniversityHangzhou 310000China

In the realm of acoustic signal detection,the identification of weak signals,particularly.in the presence of negative signal-to-noise ratios,poses a significant *** challenge is further heightened when signals are acquired through fiber-optic hy.rophones,as these signals often lack phy.ical significance and resist clear sy.tematic *** processing methods,e.g.,low-pass filter(LPF),require a thorough understanding of the effective signal bandwidth for noise reduction,and may.introduce undesirable time *** paper introduces an innovative feedback control method with dual Kalman filters for the demodulation of phase signals with noises in fiber-optic hy.rophones.A mathematical model of the closed-loop sy.tem is established to guide the design of the feedback control,aiming to achieve a balance with the input phase *** dual Kalman filters are instrumental in mitigating the effects of signal noise,observation noise,and control execution noise,thereby.enabling precise estimation for the input phase *** effectiveness of this feedback control method is demonstrated through examples,showcasing the restoration of low-noise signals,negative signal-to-noise ratio signals,and multi-frequency.*** research contributes to the technical advancement of high-performance devices,including fiber-optic hy.rophones and phase-locked amplifiers.

关键词： feedback control method fiber-optic hy.rophone acoustic signal detection phase signal