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Multi-AUV Inspection for Process Monitoring of Underwater Oil Transportation

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IEEE/CAA Journal of Automatica Sinica 2023年第3期10卷 828-830页

作者： jingyi he Jiabao Wen Shuai Xiao Jiachen Yang School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China IEEE

Dear Editor,This letter presents an inspection method for process monitoring of underwater oil transportation via multiple autonomous underwater vehicles(AUV).To improve the adaptability of our method in practice,we introduce the dynamic complex ocean current data to the previously mentioned case by using regional ocean modeling system(ROMS)for the first time.

关键词： underwater mentioned autonomous

ASCFL:Accurate and Speedy Semi-Supervised Clustering Federated Learning

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Tsinghua Science and Technology 2023年第5期28卷 823-837页

作者： jingyi he Biyao Gong Jiadi Yang Hai Wang Pengfei Xu Tianzhang Xing School of Information Science and Technology Northwest UniversityXi’an 710100China Internet of Things Research Center Northwest UniversityXi’an 710100China

The influence of non-Independent Identically Distribution(non-IID)data on Federated Learning(FL)has been a serious *** Federated Learning(CFL)is an emerging approach for reducing the impact of non-IID data,which employs the client similarity calculated by relevant metrics for ***,the existing CFL methods only pursue a single accuracy improvement,but ignore the convergence ***,the designed client selection strategy will affect the clustering ***,traditional semi-supervised learning changes the distribution of data on clients,resulting in higher local costs and undesirable *** this paper,we propose a novel CFL method named ASCFL,which selects clients to participate in training and can dynamically adjust the balance between accuracy and convergence speed with datasets consisting of labeled and unlabeled *** deal with unlabeled data,the prediction labels strategy predicts labels by *** client selection strategy is to improve accuracy and reduce overhead by selecting clients with higher losses participating in the current *** is more,the similarity-based clustering strategy uses a new indicator to measure the similarity between *** results show that ASCFL has certain advantages in model accuracy and convergence speed over the three state-of-the-art methods with two popular datasets.

关键词： federated learning clustered federated learning non-Independent Identically Distribution(non-IID)data similarity indicator client selection semi-supervised learning

Decomposition of Fast and Slow Cloud Responses to Quadrupled CO_(2)Forcing in BCC–AGCM2.0 over East Asia

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Advances in Atmospheric Sciences 2022年第12期39卷 2188-2202页

作者： Xixun ZHOU Bing XIE Hua ZHANG jingyi he Qi CheN State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Climate Studies of China Meteorological Administration National Climate CenterBeijing 100081China

In this study,the decomposed fast and slow responses of clouds to an abruptly quadrupled CO_(2)concentration(approximately 1139 ppmv)in East Asia(EA)are obtained quantitatively by using a general circulation model,BCC–*** results show that in the total response,the total cloud cover(TCC),low cloud cover(LCC),and high cloud cover(HCC)all increased north of 40°N and decreased south of 40°N except in the Tibetan Plateau(TP).The mean changes of the TCC,LCC,and HCC in EA were–0.74%,0.38%,and–0.38%in the total response,respectively;1.05%,–0.03%,and 1.63%in the fast response,respectively;and–1.79%,0.41%,and–2.01%in the slow response,*** comparison,we found that changes in cloud cover were dominated by the slow response in most areas in EA due to the changes in atmospheric temperature,circulation,and water vapor supply ***,the changes in the cloud forcing over EA related to the fast and slow responses were opposite to each other,and the final cloud forcing was dominated by the slow *** mean net cloud forcing(NCF)in the total response over EA was–1.80 W m^(–2),indicating a cooling effect which partially offset the warming effect caused by the quadrupled CO_(2).The total responses of NCF in the TP,south China(SC),and northeast China(NE)were–6.74 W m^(–2),6.11 W m^(–2),and–7.49 W m^(–2),***,the local effects of offsetting or amplifying warming were particularly obvious.

关键词： cloud cover cloud forcing quadrupled CO_(2) fast and slow responses

Evaluating the Impacts of Cloud Microphysical and Overlap Parameters on Simulated Clouds in Global Climate Models

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Advances in Atmospheric Sciences 2022年第12期39卷 2172-2187,I0023,I0024页

作者： Haibo WANG Hua ZHANG Bing XIE Xianwen JING jingyi he Yi LIU Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Climate Studies National Climate CenterChina Meteorological AdministrationBeijing 100081China Department of Climate and Space Sciences and Engineering University of MichiganAnn Arbor 48109USA

The improvement of the accuracy of simulated cloud-related variables,such as the cloud fraction,in global climate models(GCMs)is still a challenging problem in climate *** this study,the influence of cloud microphysics schemes(one-moment versus two-moment schemes)and cloud overlap methods(observation-based versus a fixed vertical decorrelation length)on the simulated cloud fraction was assessed in the BCC_AGCM2.0_CUACE/*** with the fixed decorrelation length method,the observation-based approach produced a significantly improved cloud fraction both globally and for four representative *** utilization of a two-moment cloud microphysics scheme,on the other hand,notably improved the simulated cloud fraction compared with the one-moment scheme;specifically,the relative bias in the global mean total cloud fraction decreased by 42.9%–84.8%.Furthermore,the total cloud fraction bias decreased by 6.6%in the boreal winter(DJF)and 1.64%in the boreal summer(JJA).Cloud radiative forcing globally and in the four regions improved by 0.3%−1.2% and 0.2%−2.0%,***,our results showed that the interaction between clouds and climate through microphysical and radiation processes is a key contributor to simulation uncertainty.

关键词： cloud fraction cloud microphysics scheme cloud radiative forcing vertical cloud overlap

PoQ-Consensus Based Private Electricity Consumption Forecasting via Federated Learning

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Computer Modeling in Engineering & Sciences 2023年第9期136卷 3285-3297页

作者： Yiqun Zhu Shuxian Sun Chunyu Liu Xinyi Tian jingyi he Shuai Xiao Marketing Service Center State Grid Tianjin Electric Power CompanyTianjin300120China School of Electrical and Information Engineering Tianjin UniversityTianjin300072China

With the rapid development of artificial intelligence and computer technology,grid corporations have also begun to move towards comprehensive intelligence and ***,data-based informatization can bring about the risk of privacy exposure of fine-grained information such as electricity consumption *** modeling of electricity consumption data can help grid corporations to have a more thorough understanding of users’needs and their habits,providing better services for ***,users’electricity consumption data is sensitive and *** order to achieve highly efficient analysis of massive private electricity consumption data without direct access,a blockchain-based federated learning method is proposed for users’electricity consumption forecasting in this ***,a blockchain systemis established based on a proof of quality(PoQ)consensus mechanism,and a multilayer hybrid directional long short-term memory(MHD-LSTM)network model is trained for users’electricity consumption forecasting via the federal learning *** this way,the model of the MHD-LSTM network is able to avoid suffering from severe security problems and can only share the network parameters without exchanging raw electricity consumption data,which is decentralized,secure and *** experimental result shows that the proposed method has both effectiveness and high-accuracy under the premise of electricity consumption data’s privacy preservation,and can achieve better performance when compared to traditional long short-term memory(LSTM)and bidirectional LSTM(BLSTM).

关键词： Blockchain consensus mechanism federated learning electricity consumption forecasting privacy preservation

Synergistic effects of lipopolysaccharide and rotenone on dopamine neuronal damage in rats

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中国药理学与毒理学杂志 2023年第7期37卷 522-523页

作者： WANG Yuanyuan he jingyi ZHANG Feng Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education Zunyi Medical University

OBJECTIVE The etiology of Parkinson disease(PD) is still unknown. Until now,oxidative stress and neuroinflammation play a crucial role in the pathogenesis of PD. However, the specific synergistic role of oxidative stress and neuroinflammation in the occurrence and development of PD remains unclear. METHODS The changes in motor behavior, dopamine(DA) neurons quantification and their mitochondrial respiratory chain,glial cells activation and secreted cytokines, Nrf2 signaling pathway, and redox balance in the brain of rats were evaluated. RESULTS Lipopolysaccharide(LPS)-induced neuroinflammation and rotenone(ROT)-induced oxidative stress synergistically aggravated motor dysfunction, DA neuron damage, activation of glial cells, and release of related mediators, activation of Nrf2 signaling and destruction of oxidative balance. In addition, further studies indicated that after ROT-induced oxidative stress caused direct damage to DA neurons, LPSinduced inflammatory effects had stronger promoting neurotoxic effects on the above aspects. CONCLUSION Neuroinflammation and oxidative stress synergistically aggravated DA neuronal loss. Furtherly, oxidative stress followed by neuroinflammation caused more DA neuronal loss than neuroinflammation followed by oxidative stress.

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Potential Impact of Tonga Volcano Eruption on Global Mean Surface Air Temperature

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Journal of Meteorological Research 2022年第1期36卷 1-5页

作者： Hua ZHANG Fei WANG Jian LI Yihong DUAN Congwen ZHU jingyi he State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081 Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044

The undersea volcano,located in the South Pacific island nation of Tonga,violently erupted from 14 to 15 January *** Tonga volcano eruption has aroused extensive discussion in the climate change *** climatologists believe that this event will cause little effect on global climate change while others insist that it will trigger“the year without a summer”as the Tambora eruption did in *** will the Tonga volcano eruption affect global climate change?Based on the indices of past volcanic eruptions and the eruption data of El Chichón volcano in 1982,we use a simplified radiation equilibrium model to quantify the stratospheric aerosol radiative forcing and the change in global mean surface air temperature(Ts)caused by the Tonga volcano *** results show that the global average Ts will decrease by about 0.0315-0.1118℃in the next 1-2 *** Tonga eruption will slightly slow down the global warming in a short period of time,but it will not change the global warming trend in the long *** addition,we propose a generalized approach for estimating the impact of future volcanic eruption on global mean T_(s).

关键词： Tonga volcano eruption simplified radiation equilibrium model radiative forcing global mean surface air temperature global warming

Flunarizine and lamotrigine prophylaxis effects on neuron-specific enolase, S-100, and brain-specific creatine kinase in a fetal rat model of hypoxic-ischemic brain damage

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Neural Regeneration Research 2008年第7期3卷 768-771页

作者： Li he jingyi Deng Wendan he Department of Pediatrics Shenzhen Fourth People＇s Hospital Guangdong Medical College Shenzhen 518033 Guangdong Province China

BACKGROUND： Calcium antagonists may act as neuroprotectants, diminishing the influx of calcium ions through voltage-sensitive calcium channels. When administered prophylactically, they display neuroprotective effects against hypoxic-ischemic brain damage in newborn rats. OBJECTIVE： To investigate the neuroprotective effects of flunarizine （FNZ）, lamotrigine （LTG） and the combination of both drugs, on hypoxic-ischemic brain damage in fetal rats. DESIGN AND SETTING： This randomized, complete block design was performed at the Department of Pediatrics, Shenzhen Fourth People＇s Hospital, Guangdong Medical College. MATERIALS： Forty pregnant Wistar rats, at gestational day 20, were selected for the experiment and were randomly divided into FNZ, LTG, FNZ ＋ LTG, and model groups, with 10 rats in each group. METHODS： Rats in the FNZ, LTG, and FNZ ＋ LTG groups received intragastric injections of FNZ （0.5 mg/kg/d）, LTG （10 mg/kg/d）, and FNZ （0.5 mg/kg/d）＋ LTG （10 mg/kg/d）, respectively. Drugs were administered once a day for 3 days prior to induction of hypoxia-ischemia. Rats in the model group were not administered any drugs. Three hours after the final administration, eight pregnant rats from each group underwent model establishment hypoxia-ischemia brain damage to the fetal rats. Cesareans were performed at 6, 12, 24, and 48 hours later; and 5 fetal rats were removed from each mother and kept warm. Two fetuses without model establishment were removed by planned cesarean at the same time and served as controls. A total of 0.3 mL serum was collected from fetal rats at 6, 12, 24, and 48 hours, respectively, following birth. MAIN OUTCOME MEASURES： Serum protein concentrations of neuron-specific enolase and S-100 were measured by ELISA. Serum concentrations of brain-specific creatine kinase were measured using an electrogenerated chemiluminescence method. RESULTS： Serum concentrations of neuron-specific enolase, S-100, and brain-specific creatine kinase were signific

关键词： flunarizine lamotrigine hypoxic-ischemic brain damage neuron-specific enolase S-100 brain-specific creatine kinase

Structural Optimization of Hatch Cover Based on Bi-directional Evolutionary Structure Optimization and Surrogate Model Method

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Journal of Shanghai Jiaotong university(Science) 2018年第4期23卷 538-549页

作者： LI Kai YU Yanyun he jingyi ZHAO Decai LIN Yan School of Naval Architecture and Ocean Engineering Dalian University of TechnologyDalian 116023LiaoningChina

Weight reduction has attracted much attention among ship designers and ship *** the present work,based on an improved bi-directional evolutionary structural optimization(BESO) method and surrogate model method,we propose a hybrid optimization method for the structural design optimization of beam-plate structures,which covers three optimization levels:dimension optimization,topology optimization and section *** objective of the proposed optimization method is to minimize the weight of design object under a group of *** kernel optimization procedure(KOP) uses BESO to obtain the optimal topology from a ground *** deal with beam-plate structures,the traditional BESO method is improved by using cubic box as the unit cell instead of solid unit to construct periodic lattice *** the first optimization level,a series of ground structures are generated based on different dimensional parameter combinations,the KOP is performed to all the ground structures,the response surface model of optimal objective values and dimension parameters is created,and then the optimal dimension parameters can be *** the second optimization level,the optimal topology is obtained by using the KOP according to the optimal dimension *** the third optimization level,response surface method(RSM) is used to determine the section *** proposed method is applied to a hatch cover structure *** locations and shapes of all the structural members are determined from an oversized ground *** results show that the proposed method leads to a greater weight saving,compared with the original design and genetic algorithm(GA) based optimization results.

关键词： hatch cover structure optimization multi-level optimization hi-directional evolutionary structural optimization response surface method