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Structural design of aeroengine radiators:State of the art and perspectives

Propulsion and Power Research 2024年第3期13卷 319-334页

作者： Cheng-Wei Fei Chen Li jia-yi lin Yao-jia Han Yat-Sze Choy Chuan-Hai Chen Department of Aeronautics and Astronautics Fudan UniversityShanghai 200433China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHong Kong 999077China Key Laboratory of CNC Equipment Reliability Ministry of EducationJilin UniversityChangchun 130015China

Structural modularization,lightweight and functional integration are the urgent devel-opment directions for next generation high-performance *** concentration during aeroengine operation would lead to local high temperature,which tremendously negative impacts on aeroengine structural life and ***,the design and optimization of radiator structures are significant for the efficiency and reliability of *** structural geometry design and layout optimization of radiators is promising to improve the heat dissipation efficiency and reduce aerodynamic *** purpose of this study is to investigate the state of the art and perspectives of aeroengine radiator structural design by a comprehensive literature *** main contents involve the review on the structural design and layout optimization technologies of radiator structures,the analyses of the structural features,design theory and methods of existed radiator structures,the induction of the theory and method of different radiators structural opti-mization design,and the discussion on the application perspectives of advanced structures in aeroengine radiators,the report on the current challenges and development directions of the design of radiator structures,including smart materials,lattice structures,variable structures,advanced optimization theories and methods,heat dissipation methods and so *** efforts of this study are promising to support the high-performance and lightweight design of aeroengine structures besides radiators,and thermal management system.

关键词： Aeroengine Radiator structure Smart structure Structure design Advanced materials

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江苏省耕地非粮化时空格局演变及驱动因素分析

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长江流域资源与环境 2024年第2期33卷 436-447页

作者：徐畅郭杰易家林欧名豪南京农业大学公共管理学院江苏南京210095 农村土地资源利用与整治国家地方联合工程研究中心江苏南京210095 南京农业大学中国资源环境与发展研究院江苏南京210095

研究江苏省耕地非粮化时空特征及其驱动因素,为保护耕地和保障粮食安全的政策制定提供参考。基于耕地非粮化的影响机制解析,选择江苏省作为研究区域,分析1996~2020年县域耕地非粮化时空格局演变及其驱动机制,并采用主成分分析法研究驱... 详细信息

研究江苏省耕地非粮化时空特征及其驱动因素,为保护耕地和保障粮食安全的政策制定提供参考。基于耕地非粮化的影响机制解析,选择江苏省作为研究区域,分析1996~2020年县域耕地非粮化时空格局演变及其驱动机制,并采用主成分分析法研究驱动机制及其区域分异。结果表明:(1)江苏省耕地非粮化面积和比率呈现倒“U”型的变化趋势,面积由2322.49千hm2上升到2704.78千hm2后降至2072.76千hm2,比率由19.28%上升至35.46%后降至27.72%;(2)全省县域耕地非粮化率分布具有显著空间集聚特征,整体呈现苏南的高高聚集和苏中、苏北的低低聚集为主,前期为苏北低-近沪地区高,后期主要呈现苏中低-苏南高聚集格局;(3)基于长时序面板数据分析发现,地均GDP和城乡居民可支配收入比与耕地非粮化率呈显著正相关,老龄化程度与非粮化率呈显著负相关关系;(4)经济欠发达地区更容易受社会经济因子影响,经济较发达地区非粮化更易受经营者生产决策影响,资源禀赋较差地区更倾向于非粮化种植。

关键词：耕地非粮化作用机制时空格局演变江苏省

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State Classification via a Random-Walk-Based Quantum Neural Network

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Chinese Physics Letters 2022年第5期39卷 4-9页

作者： Lu-Ji Wang jia-yi lin Shengjun Wu Institute for Brain Sciences and Kuang Yaming Honors School Nanjing UniversityNanjing 210023China School of Physics Nanjing UniversityNanjing 210093China

In quantum information technology,crucial information is regularly encoded in different quantum *** extract information,the identification of one state from the others is ***,if the states are nonorthogonal and unknown,this task will become awesomely tricky,especially when our resources are also ***,we introduce the quantum stochastic neural network(QSNN),and show its capability to accomplish the binary discrimination of quantum *** a handful of optimizing iterations,the QSNN achieves a success probability close to the theoretical optimum,no matter whether the states are pure or *** than binary discrimination,the QSNN is also applied to classify an unknown set of states into two types:entangled ones and separable *** training with four samples,it can classify a number of states with acceptable *** results suggest that the QSNN has the great potential to process unknown quantum states in quantum information.

关键词： quantum classify separable

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Combined immune checkpoint inhibitors of CTLA4 and PD-1 for hepatic melanoma of unknown primary origin: A case report

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World Journal of Clinical Cases 2021年第11期9卷 2641-2648页

作者： An-Che Cheng yi-jia lin Sung-Hua Chiu Yu-Lueng Shih Department of Internal Medicine Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Department of Pathology Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Department of Radiology Tri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan Department of Internal Medicine Division of GastroenterologyTri-Service General HospitalNational Defense Medical CenterTaipei 114Taiwan

BACKGROUND Melanoma is uncommonly found in lymph nodes,subcutaneous tissue,or visceral organs without a primary lesion,where it is identified as metastatic melanoma with unknown primary(MUP).Hepatic MUP is extremely rare and has a poor *** is limited information on its pathogenesis,clinical and imaging features,and pathological *** are no guidelines for the use of immune checkpoint inhibitors(ICIs)in hepatic MUP,and the treatment outcome has rarely been *** SUMMARY A 42-year-old woman presented to our hospital with hepatic tumors found incidentally during a routine ***-enhanced abdominal computerized tomography showed multiple mass lesions in the *** results revealed melanoma,which was confirmed by immunohistochemical staining for HMB-45(+),Melan-A(+),S-100(+),and SOX10(+).There was no evidence of primary cutaneous,ocular,gastrointestinal,or anal lesion on a comprehensive *** patient was diagnosed with hepatic *** received combined antibodies against cytotoxic T-lymphocyte-associated antigen 4(CTLA-4,ipilimumab)and programmed death protein-1(PD-1,nivolumab).She died of hepatic failure 9 mo after hepatic MUP was *** the first case of hepatic MUP treated with combined ipilimumab and nivolumab,who showed better outcome than previous *** ICIs of PD-1 and CTLA-4 may be considered as the first-line therapyfor patients with hepatic MUP.

关键词： Metastatic melanoma with unknown primary Liver metastasis Immune checkpoint inhibitor Programmed death protein-1 Cytotoxic T-lymphocyte-associated antigen 4 Case report

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Machine Learning Security Defense Algorithms Based on Metadata Correlation Features

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Computers, Materials & Continua 2024年第2期78卷 2391-2418页

作者： Ruchun jia jianwei Zhang yi lin College of Computer Science Sichuan UniversityChengdu610065China

With the popularization of the Internet and the development of technology,cyber threats are increasing day by *** such as malware,hacking,and data breaches have had a serious impact on *** network security environment in the era of big data presents the characteristics of large amounts of data,high diversity,and high real-time *** security defense methods and tools have been unable to cope with the complex and changing network security *** paper proposes a machine-learning security defense algorithm based on metadata association *** control over unauthorized users through privacy,integrity,and *** user model is established and the mapping between the user model and the metadata of the data source is *** analyzing the user model and its corresponding mapping relationship,the query of the user model can be decomposed into the query of various heterogeneous data sources,and the integration of heterogeneous data sources based on the metadata association characteristics can be *** and classify customer information,automatically identify and perceive sensitive data,build a behavior audit and analysis platform,analyze user behavior trajectories,and complete the construction of a machine learning customer information security defense *** experimental results show that when the data volume is 5×103 bit,the data storage integrity of the proposed method is 92%.The data accuracy is 98%,and the success rate of data intrusion is only 2.6%.It can be concluded that the data storage method in this paper is safe,the data accuracy is always at a high level,and the data disaster recovery performance is *** method can effectively resist data intrusion and has high air traffic control *** can not only detect all viruses in user data storage,but also realize integrated virus processing,and further optimize the security defense effect of user big data.

关键词： Data-oriented architecture metadata correlation features machine learning security defense data source integration

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The principle and amelioration of lithium plating in fast-charging lithium-ion batteries

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Journal of Energy Chemistry 2024年第10期97卷 453-459,I0009页

作者： yi Yang Xia-lin Zhong Lei Xu Zhuo-lin Yang Chong Yan jia-Qi Huang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Yangtze River Delta Graduate School of Beijing Institute of Technology Jiaxing 314003ZhejiangChina

Fast charging is restricted primarily by the risk of lithium(Li)plating,a side reaction that can lead to the rapid capacity decay and dendrite-induced thermal runaway of lithium-ion batteries(LIBs).Investigation on the intrinsic mechanism and the position of Li plating is crucial to improving the fast rechargeability and safety of ***,we investigate the Li plating behavior in porous electrodes under the restricted transport of Li^(+).Based on the theoretical model,it can be concluded that the Li plating on the anodeseparator interface(ASI)is thermodynamically feasible and kinetically ***,the prior deposition of metal Li on the ASI rather than the anode-current collector interface(ACI)is verified *** order to facilitate the transfer of Li^(+)among the electrode and improve the utilization of active materials without Li plating,a bilayer asymmetric anode composed of graphite and hard carbon(GH)is *** and simulation results suggest that the GH hybrid electrode homogenizes the lithiated-rate throughout the electrode and outperforms the pure graphite electrode in terms of the rate performance and inhibition of Li *** work provides new insights into the behavior of Li plating and the rational design of electrode structure.

关键词： Graphite Hard carbon Fast charging Lithium plating Lithium-ion batteries

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Cluster DetectionMethod of Endogenous Security Abnormal Attack Behavior in Air Traffic Control Network

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Computers, Materials & Continua 2024年第5期79卷 2523-2546页

作者： Ruchun jia jianwei Zhang yi lin Yunxiang Han Feike Yang College of Computer Science Sichuan UniversityChengdu610065China Equipment Management and Unmanned Aerial Vehicle College of Air Force Engineering University Air Force Engineering UniversityXi’an710051China

In order to enhance the accuracy of Air Traffic Control(ATC)cybersecurity attack detection,in this paper,a new clustering detection method is designed for air traffic control network security *** feature set for ATC cybersecurity attacks is constructed by setting the feature states,adding recursive features,and determining the feature *** expected information gain and entropy of the feature data are computed to determine the information gain of the feature data and reduce the interference of similar feature *** autoencoder is introduced into the AI(artificial intelligence)algorithm to encode and decode the characteristics of ATC network security attack behavior to reduce the dimensionality of the ATC network security attack behavior *** on the above processing,an unsupervised learning algorithm for clustering detection of ATC network security attacks is ***,determine the distance between the clustering clusters of ATC network security attack behavior characteristics,calculate the clustering threshold,and construct the initial clustering ***,the new average value of all feature objects in each cluster is recalculated as the new cluster ***,it traverses all objects in a cluster of ATC network security attack behavior feature ***,the cluster detection of ATC network security attack behavior is completed by the computation of objective *** experiment took three groups of experimental attack behavior data sets as the test object,and took the detection rate,false detection rate and recall rate as the test indicators,and selected three similar methods for comparative *** experimental results show that the detection rate of this method is about 98%,the false positive rate is below 1%,and the recall rate is above 97%.Research shows that this method can improve the detection performance of security attacks in air traffic control network.

关键词： Air traffic control network security attack behavior cluster detection behavioral characteristics information gain cluster threshold automatic encoder

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Optimization of the co-closing law of guide vanes and blades for bulb turbines based on CFD

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Journal of Hydrodynamics 2024年第2期36卷 363-377页

作者： Hui Liu Yun-fa lin Yong-guang Cheng Song Xue Mao-jia Tang jian Zhang jia-yi Fan State Key Laboratory of Water Resources Engineering and Management Wuhan UniversityWuhan430072China Dongfang Electric Machinery Co. Ltd.Deyang618000China

The load rejection transient process of bulb turbine units is critical to safety of hydropower stations,and determining appropriate closing laws of guide vanes(GVs)and runner blades(RBs)for this process is of *** this study,we proposed a procedure to optimize the co-closing law of GVs and RBs by using computational fluid dynamics(CFD),combined with the design of experiment(DOE)method,approximation model,and genetic optimization *** sensitivity of closing law parameters on the histories of head,speed,and thrust was analyzed,and a two-stage GVs’closing law associating with a linear RBs’closing law was *** results show that GVs dominate the transient characteristics by controlling the change of *** GVs’first-stage closing speed while shortening first-stage closing time can not only significantly reduce the maximum rotational speed but also suppress the water hammer pressure;slowing GVs’second-stage closing speed is conducive to controlling the maximum reverse axial *** directly affect the runner *** RBs’closing speed can further reduce the rotational speed and the maximum reverse axial *** safety margin of each control parameter,flow patterns,and pressure pulsations of a practical hydropower station were all improved after optimization,demonstrating the effectiveness of this method.

关键词： Bulb turbine load rejection transient process double regulation closing law optimization computational fluid dynamics(CFD)

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Regulating photothermal properties of near-infrared croconaine dyes by supramolecular assembly

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Nano Research 2024年第9期17卷 8560-8570页

作者： Yangge Ren Yue Lu Juanjuan Gao yi Ding Bo Zhu Xinyu Hou lin jia Department of Polymer Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Department of Electronic Information Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200444China

The photochemical and photophysical properties of near-infrared(NIR)dyes are significantly influenced by their aggregation state and mesoscopic ***,beyond chemical synthesis,the regulation mechanisms for the properties of NIR dyes,particularly with respect to photothermal properties of the aggregates,are not yet fully ***,we investigate the photothermal behaviors of croconaine-based(CroA)NIR dyes containing dipeptide or amino acids *** introduction of hydrogen bonding promotesπ-πstacking of croconaine center,which can efficiently regulate aggregation states and assembly structures in *** laser irradiation,CroA aggregates undergo aggregation-dissociation transition,the in-situ monomer generation process regulates two parameters of photothermal performance:heating rates and plateau photothermal *** study reveals the regulation effect of non-covalent bonding interactions on CroA aggregates,highlighting supramolecular assembly strategy not only facilitates to construct of photothermal nanomaterials with well-defined structures,but also provides an alternative and effective method for regulating photothermal performance of NIR dyes.

关键词： croconaine dye hydrogen bonding photothermal performance supramolecular assembly chirality

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A multi-mechanism numerical simulation model for CO_(2)-EOR and storage in fractured shale oil reservoirs

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Petroleum Science 2024年第3期21卷 1814-1828页

作者： Yuan-Zheng Wang Ren-yi Cao Zhi-Hao jia Bin-Yu Wang Ming Ma lin-Song Cheng College of Petroleum Engineering China University of Petroleum(Beijing)Beijing102249China John&Willie Leone Department of Energy&Mineral Engineering The Pennsylvania State UniversityUniversity Park16802PA.USA

Under the policy background and advocacy of carbon capture,utilization,and storage(CCUS),CO_(2)-EOR has become a promising direction in the shale oil reservoir *** multi-scale pore structure distribution and fracture structure lead to complex multiphase flow,comprehensively considering multiple mechanisms is crucial for development and CO_(2) storage in fractured shale *** this paper,a multi-mechanism coupled model is developed by *** to the traditional Eclipse300 and MATLAB Reservoir Simulation Toolbox(MRST),this model considers the impact of pore structure on fluid phase behavior by the modified Peng—Robinson equation of state(PR-EOS),and the effect simultaneously radiate to Maxwell—Stefan(M—S)diffusion,stress sensitivity,the nano-confinement(NC)***,a modified embedded discrete fracture model(EDFM)is used to model the complex fractures,which optimizes connection types and half-transmissibility calculation approaches between non-neighboring connections(NNCs).The full implicit equation adopts the finite volume method(FVM)and Newton—Raphson iteration for discretization and *** model verification with the Eclipse300 and MRST is *** results show that the interaction between the mechanisms significantly affects the production performance and storage *** effect of molecular diffusion may be overestimated in oil-dominated(liquid-dominated)shale *** well spacing and injection gas rate are the most crucial factors affecting the production by sensitivity ***,the potential gas invasion risk is *** model provides a reliable theoretical basis for CO_(2)-EOR and sequestration in shale oil reservoirs.

关键词： CO_(2)-EOR CO_(2)storage Shale oil reservoir Complex fracture model Multiple mechanisms

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