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Analysis of Sea Surface Temperature Cooling in Typhoon Events Passing the Kuroshio Current

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Journal of Ocean University of China 2024年第2期23卷 287-303页

作者： hu Yuyi shao weizeng SHEN wei ZUO Juncheng JIANG Tao hu Song College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China East China Sea Environment Monitoring Ministry of Natural ResourcesShanghai 201206China China Waterborne Transport Research Institute Ministry of TransportBeijing 100088China

The aim of this study is to investigate the sea surface temperature(SST) cooling as typhoons pass the Kuroshio Current.A numerical circulation model,denoted as the Stony Brook Parallel Ocean Model(sbPOM),was used to simulate the SST,which includes four wave-induced effect terms(i.e.,radiation stress,nonbreaking waves,Stokes drift,and breaking waves) simulated using the third-generation wave model,called WAVEWATCH-Ⅲ(WW3).The significant wave height(SWH) measurements from the Jason-2 altimeter were used to validate the WW3-simulated results,yielding a root mean square error(RMSE) of less than 0.50 m and a correlation coefficient(COR) of approximately *** water temperature measured from the Advanced Research and Global Observation Satellite was applied to validate the model ***,the RMSE of the SST is 0.92℃ with a COR of approximately *** revealed in the sbPOM-simulated SST fields,a reduction in the SST at the Kuroshio Current region was observed as a typhoon passed,although the water temperature of the Kuroshio Current is relatively *** variation of the SST is consistent with that of the current,whereas the maximum SST lagged behind the occurrence of the peak ***,the Stokes drift plays an important role in the SST cooling after analyzing four wave-induced terms in the background of the Kuroshio *** sensitivity experiment also showed that the accuracy of the water temperature was significantly reduced when including breaking waves,which play a negative role in the inside part of the *** variation in the mean mixing layer depth(MLD) showed that a typhoon could enhance the mean MLD in the Kuroshio Current area in September and October,whereas a typhoon has little influence on the mean MLD in the Kuroshio Current area in ***,the mean MLD rapidly decreased with the weakening of the strong wind force and wave-induced effects when a typhoon crossed the Kuroshio Current.

关键词： typhoon wave sea surface temperature Kuroshio Current

Contribution of Surface Waves to Sea Surface Temperatures in the Arctic Ocean

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Journal of Ocean University of China 2024年第5期23卷 1151-1162页

作者： wei Meng shao weizeng SHEN wei hu Yuyi ZHANG Yu ZUO Juncheng College of Oceanography and Ecological Science Shanghai Ocean UniversityShanghai 201306China China Waterborne Transport Research Institute Ministry of Transport of the People’s Republic of ChinaBeijing 100088China

The aim of our study was to examine the contribution of surface waves from WAVEWATCH-III(WW3)to the variation in sea surface temperature(SST)in the Arctic *** simulated significant wave height(SWH)were validated against the products from Haiyang-2B(HY-2B)in 2021,obtaining a root mean squared error(RMSE)of 0.45 with a correlation of 0.96 and scatter index of *** wave-induced effects,i.e.,wave breaking and mixing induced by nonbearing waves resulting in changes in radiation stress and Stokes drift,were calculated from WW3,ERA-5 wind,SST,and salinity data from the National Centers for Environmental Prediction and were taken as forcing fields in the Stony Brook Parallel Ocean *** results showed that an RMSE of 0.81℃ with wave-induced effects was less than the RMSE of 1.11℃ achieved without the wave term compared with the simulated SST with the measurements from *** the four wave effects and sea ice freezing,the SST in the Arctic Ocean decreased by up to 1℃ in *** analysis revealed that the SWH was linear in SST(values without subtraction of waves)in summer and autumn,but this behavior was not observed in spring or winter due to the presence of sea *** interannual variation also presented a negative relationship between the difference in SST and SWH.

关键词： sea surface wave sea surface temperature Arctic Ocean

Distribution System Restoration with Cyber Failures Based on Co-dispatching of Multiple Recovery Resources

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1096-1112页

作者： Zhengze wei Kaigui Xie Bo hu Yu Wang Changzheng shao Pierluigi Siano Jun Zhong National Key Laboratory of Power Transmission Equipment Technology Chongqing UniversityChongqing 400044China Department of Management and Innovation Systems University of SalernoFisciano 84084Italyand he is also with the Department of Electrical and Electronic Engineering ScienceUniversity of JohannesburgJohannesburg 2006South Africa Shenzhen Power Supply Co. Ltd.China Southern Power GridShenzhen 518000China

Improving the restoration efficiency of a distribu-tion system is essential to enhance the ability of power systems to deal with extreme *** distribution system restoration(DSR)depends on the interaction among the electric network(EN),cyber network(CN),and traffic network(TN).However,the coordination of these three networks and co-dispatching of multiple recovery resources have been mostly *** paper proposes a novel DSR framework,which is formulated as a mixed-integer linear programming(MILP)*** fail-ures in cyber lines result in cyber blind areas,which restrict the normal operation of remote-controlled *** acceler-ate the recovery process,multiple recovery resources are uti-lized including electric maintenance crews(EMCs),cyber main-tenance crews(CMCs),and emergency communication vehicles(ECVs).Specifically,CMCs and ECVs restore the cyber func-tion of switches in cooperation,and EMCs repair damaged elec-tric *** travel time of these three dispatchable resources is determined by *** effectiveness and superiority of the proposed framework are verified on the modified IEEE 33-node and 123-node test systems.

关键词： Distribution system restoration(DSR) network coupling maintenance crew co-dispatching emergency communicationvehicle

A Bregman-Style Improved ADMM and its Linearized Version in the Nonconvex Setting:Convergence and Rate Analyses

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Journal of the Operations Research Society of China 2024年第2期12卷 298-340页

作者： Peng-Jie Liu Jin-Bao Jian hu shao Xiao-Quan Wang Jia-wei Xu Xiao-Yu Wu School of Mathematics Jiangsu Center for Applied MathematicsChina University of Mining and TechnologyXuzhou 221116JiangsuChina School of Mathematics and Physics Center for Applied Mathematics of GuangxiGuangxi Minzu UniversityNanning 530006GuangxiChina Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina School of Mathematics and Computational Science Xiangtan UniversityXiangtan 411105HunanChina

This work explores a family of two-block nonconvex optimization problems subject to linear *** first introduce a simple but universal Bregman-style improved alternating direction method of multipliers(ADMM)based on the iteration framework of ADMM and the Bregman ***,we utilize the smooth performance of one of the components to develop a linearized version of *** to the traditional ADMM,both proposed methods integrate a convex combination strategy into the multiplier update *** each proposed method,we demonstrate the convergence of the entire iteration sequence to a unique critical point of the augmented Lagrangian function utilizing the powerful Kurdyka–Łojasiewicz property,and we also derive convergence rates for both the sequence of merit function values and the iteration ***,some numerical results show that the proposed methods are effective and encouraging for the Lasso model.

关键词： Nonconvex optimization Alternating direction method of multipliers Kurdyka-Lojasiewicz property Convergence rate

Propagation Properties of Shock Waves in Polyurethane Foam based on Atomistic Simulations

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Defence Technology（防务技术） 2024年第1期31卷 117-129页

作者： Zhiqiang hu Jianli shao Shiyu Jia weidong Song Cheng Wang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

Porous materials are widely used in the field of protection because of their excellent energy absorption *** this work,a series of polyurethane microscopic models are established and the effect of porosity on the shock waves is studied with classical molecular dynamics ***,shock hugoniot relations for different porosities are obtained,which compare well with the experimental *** pores collapse and form local stress wave,which results in the complex multi-wave structure of the shock *** microstructure analysis shows that the local stress increases and the local velocity decreases gradually during the process of pore collapse to complete ***,it leads to stress relaxation and velocity *** shock stress peaks can be fitted with two exponential functions,and the amplitude of attenuation coefficient decreases with the increase of ***,the pore collapse under shock or non-shock are discussed by the entropy increase rate of the *** energy is dissipated mainly through the multiple interactions of the waves under *** energy is dissipated mainly by the friction between atoms under non-shock.

关键词： Polyurethane foam Shock wave Attenuation Atomistic simulation

Investigation of mechanical and electrical characteristics of selfsensing pneumatic torsional actuators

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Science China(Technological Sciences) 2024年第1期67卷 130-142页

作者： XIAO wei hu DeAn hu GuoLiang XIAO Yihua Key Laboratory of Conveyance and Equipment Ministry of EducationEast China Jiaotong UniversityNanchang 330013China Key Laboratory of Advanced Design and Simulation Techniques for Special Equipment Ministry of EducationHunan UniversityChangsha 410082China

Soft pneumatic actuators are one of the most promising actuation for soft robots,and great achievements have been *** it remains challenging to endow sensing capabilities to pneumatic actuators,especially for the sensing ability originating directly from the actuator ***,a self-sensing pneumatic torsional actuator(SPTA)is designed based on the electromagnetic induction effect and magnetically responsive *** SPTA can generate feedback voltage and current with the deformation,in which the sensing function comes from its inherent *** investigate the mechanical and electrical characteristics,an experimental platform and a finite element model are established,*** find that the torsion angle and output torque increase in nonlinear with the actuating *** maximum torsion angle is 66.35°,which is 84.34%of that for the actuator fabricated by pure *** maximum output torque(24.9 N mm)improves by 23.19%compared with the actuator made by pure *** regards the electrical characteristics,the maximum feedback voltage and current are 2.90μV and 29.50 nA when the SPTA is actuated by a pressure of−40 *** also demonstrate that the relationship between the torsion angle and the magnetic flux change is approximately ***,the number of turns of wires,magnetic powders contents,and magnetic direction on the feedback voltage and current are *** show that the feedback voltage and current can be enhanced by increasing the number of turns and magnetic powders *** envision that the SPTA would be promising for soft robots to realize their accuracy control and intelligentization.

关键词： pneumatic torsional actuators self-sensing feedback voltage finite element modeling soft robots

A Defense Planning Model for a Power System Against Coordinated Cyber-physical Attack

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Protection and Control of Modern Power Systems 2024年第5期9卷 84-95页

作者： Peiyun Li Jian Fu Kaigui Xie Bo hu Yu Wang Changzheng shao Yue Sun wei huang State Key Laboratory of Power Transmission Equipment&System Secu-rity and New Technology Chongqing UniversityChongqing 400044China State Grid Chengdu Power Supply Com-pany State Grid Sichuan Electric Power Co.Ltd.Chengdu 610041China China Yangtze Power Co. LtdYichang 443002China

This paper proposes a tri-level defense planning model to defend a power system against a coor-dinated cyber-physical attack(CCPA).The defense plan considers not only the standalone physical attack or the cyber attack,but also coordinated *** defense strategy adopts coordinated generation and transmission expansion planning to defend against the *** the process of modeling,the upper-level plan represents the perspective of the planner,aiming to minimize the critical load shedding of the planning system after the *** load resources available to planners are extended to flex-ible loads and critical *** middle-level plan is from the viewpoint of the attacker,and aims at generating an optimal CCPA scheme in the light of the planning strategy determined by the upper-level plan to maximize the load shedding caused by the *** optimal operational behavior of the operator is described by the lower-level plan,which minimizes the load shedding by defending against the *** tri-level model is analyzed by the column and constraint generation algorithm,which de-composes the defense model into a master problem and *** studies on a modified IEEE RTS-79 system are performed to demonstrate the economic effi-ciency of the proposed *** Terms—Coordinated cyber-physical attack,flexible load,column-and-constraint generation,defense planning,robust optimization.

关键词： Coordinated cyber-physical attack flexible load column-and-constraint generation defense planning robust optimization.

An orchestrated ethylene-gibberellin signaling cascade contributes to mesocotyl elongation and emergence of rice direct seeding

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Journal of Integrative Plant Biology 2024年第7期66卷 1427-1439页

作者： Yusong Lyu Xinli Dong Shipeng Niu Ruijie Cao Gaoneng shao Zhonghua Sheng Guiai Jiao Lihong Xie Shikai hu shaoqing Tang Xiangjin wei Peisong hu State Key Laboratory of Rice Biology and Breeding China National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 310006China College of Agriculture and Biotechnology Zhejiang UniversityHangzhou 310058China

A mechanized direct seeding of rice with less labor and water usage,has been widely ***,this approach requires varieties that exhibit uniform seedling *** elongation(ME)offers the main drive of fast emergence of rice seedlings from soils;nevertheless,its genetic basis remains ***,we identify a major rice quantitative trait locus Mesocotyl Elongation1(qME1),an allele of the Green Revolution gene Semi-Dwarf1(SD1),encoding GA20-oxidase for gibberellin(GA)***1 expression is strongly induced by soil depth and *** rice grains are direct-seeded in soils,the ethylene core signaling factor OsEIL1 directly promotes ME1 transcription,accelerating bioactive GA *** GAs further degrade the DELLA protein SLENDER RICE 1(SLR1),alleviating its inhibition of rice PHYTOCHROME-INTERACTING FACTOR-LIKE13(OsPIL13)to activate the downstream expansion gene OsEXPA4 and ultimately promote rice seedling ME and *** ancient traits of long mesocotyl and strong emergence ability in wild rice and landrace were gradually lost in company with the Green Revolution dwarf breeding process,and an elite ME1-R allele(D349H)is found in some modern Geng varieties(long mesocotyl lengths)in northern China,which can be used in the direct seeding and dwarf breeding of Geng ***,the ectopic and high expression of ME1 driven by mesocotyl-specific promoters resulted in rice plants that could be direct-seeded without obvious plant architecture or yield ***,we reveal the molecular mechanism of rice ME,and provide useful information for breeding new Green Revolution varieties with long mesocotyl suitable for direct-seeding practice.

关键词： rice(Oryza sativa L.) direct seeding Green Revolu-tion mesocotyl elongation ethylene gibberellin semi-dwarf1(SD1)

The non-stationary and spatially varying associations between hand,foot and mouth disease and multiple environmental factors:A Bayesian spatiotemporal mapping model study

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Infectious Disease Modelling 2024年第2期9卷 373-386页

作者： Li Shen Minghao Sun Mengna wei Qingwu hu Yao Bai Zhongjun shao Kun Liu School of Remote Sensing and Information Engineering Wuhan UniversityWuhanHubei ProvinceChina Department of Infection Disease Control and Prevention Xi'an Center for Disease Control and PreventionXi'anShaanxiChina Department of Epidemiology Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational EnvironmentSchool of Public HealthAir Force Medical UniversityXi'anShaanxi ProvinceChina

The transmission and prevalence of Hand,Foot and Mouth Disease(HFMD)are affected by a variety of natural and socio-economic environmental *** study aims to quantitatively investigate the non-stationary and spatially varying associations between various environmental factors and HFMD *** collected HFMD surveillance cases and a series of relevant environmental data from 2013 to 2021 in Xi'an,Northwest *** controlling the spatial and temporal mixture effects of HFMD,we constructed a Bayesian spatiotemporal mapping model and characterized the impacts of different driving factors into global linear,non-stationary and spatially varying *** results showed that the impact of meteorological conditions on HFMD risk varies in both type and magnitude above certain thresholds(temperature:30°C,precipitation:70 mm,solar radiation:13000 kJ/m^(2),pressure:945 hPa,humidity:69%).Air pollutants(PM_(2.5),PM_(10),NO_(2))showed an inverted U-shaped relationship with the risk of HFMD,while other air pollutants(O_(3),SO_(2))showed nonlinear ***,the driving effect of increasing temperature on HFMD was significant in the 3-year period,while the inhibitory effect of increasing precipitation appeared evident in the 5-year *** addition,the proportion of urban/suburban/rural area had a strong influence on HFMD,indicating that the incidence of HFMD firstly increased and then decreased during the rapid urbanization *** influence of population density on HFMD was not only limited by spatial location,but also varied between high and low *** road density inhibited the risk of HFMD,but higher night light index promoted the occurrence of *** findings further demonstrated that both ecological and socioeconomic environmental factors can pose multiple driving effects on increasing the spatiotemporal risk of HFMD,which is of great significance for effectively responding to the changes in HFMD epidemic outbreaks.

关键词： Hand,foot,and mouth disease(HFMD) Environmental factors Bayesian spatiotemporal mapping model Non-stationary effects Spatially varying effects