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Science China(Information Sciences) 2024年第11期67卷 367-368页

作者： Lu DONG tao han Xin YUAN Chao DENG School of Cyber Science and Engineering Southeast University Engineering Research Center of Blockchain Application Supervision and ManagementSoutheast University Ministry of Education School of Automation Southeast University Institute of Advanced Technology Nanjing University of Posts and Telecommunications

Advanced persistent threat(APT) is a powerful attack pattern in which attackers lurk in the system, waiting for opportune moments and launching attacks. Remote state estimation(RSE) is an essential scenario in the cyber-physical system(CPS). The attacker's objective is to take advantage of the vulnerability in the RSE system, expanding the estimation error of the remote estimator(RE). However, the lurking demand compels the attacker to consider harvesting energy from an external quality-changing environment,which also restricts the attacker. It is of great military interest to manage attack energy in an unreliable environment and with limited resources.

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Microstructure and embrittlement of the fine-grained heat-affected zone of ASTM4130 steel

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International Journal of Minerals,Metallurgy and Materials 2011年第4期18卷 419-423页

作者： Li-ying Li Yong Wang tao han Chao-wen Li College of Mechanical and Electronic Engineering China University of Petroleum Dongying 257061 China

The mechanical properties and microstructure features of the fine-grained heat-affected zone（FGHAZ） of ASTM4130 steel was investigated by optical microscope（OM）,scanning electron microscope（SEM）,transmission electron microscope（TEM）,and welding thermal simulation *** is found that serious embrittlement occurs in the FGHAZ with an 81.37% decrease of toughness,compared with that of the base *** analysis reveals that the FGHAZ is mainly composed of acicular,equiaxed ferrite,granular ferrite,martensite,and martensite-austenite（M-A） *** FGHAZ embrittlement is mainly induced by granular ferrite because of carbides located at its boundaries and ***,the existence of martensite and M-A constituent,which distribute in a discontinuous network,is also detrimental to the mechanical properties.

关键词： ASTM4130 steel welding heat-affected zone microstructure embrittlement

Effect of hot/warm roll-forming process on microstructural evolution and mechanical properties of local thickened U-rib for orthotropic steel deck

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Journal of Iron and Steel Research International 2017年第3期24卷 335-342页

作者： Xue-feng Peng Jing Liu Jing-tao han Dong-bin Wei School of Materials Science and Engineering University of Science and Technology Beijing School of Electrical Mechanical and Mechatronic SystemsFaculty of Engineering and Information TechnologyUniversity of Technology Sydney

To improve the strength-toughness of traditional U-rib（ TUR） and solve the problem of insufficient penetration between TUR and deckplate,a new local thickened U-rib（ LTUR） has been proposed to improve the fatigue resistance of the weld joint under the premise of not increasing thickness and strength of the TUR material. And a hot /warm roll-forming process（ RFP） adopting partially induction heating to 700- 1 000℃ was carried out to fabricate LTUR. The deformation behaviors in the forming process and microstructure of LTUR have been *** properties and fracture mechanism of the LTUR after hot / warm RFP have been systematically discussed. Moreover,the results are compared with those obtained in cold RFP. Mechanical properties of the LTUR deformed above the critical transformation temperature（ A_（c3）） show high performance characteristics with marked fatigue resistance and superior toughness. Upon increasing the heating temperature from 700 to 900 ℃,the initial coarse ferrite-pearlite structure transform into equiaxed ultrafine ferrite（ 1- 3 μm） and precipitates such as（ Nb,Ti）（ C,N） are uniformly distributed in the matrix. The average dislocation density of the specimens after hot rollforming at heating temperature of 900 ℃ decreases dramatically compared with those of the specimens subjected to the cold RFP. Furthermore,a typical characteristic of ductile fracture mechanism and the high impact energy are more convinced that the specimens deformed above 900 ℃ have obtained an optimal combination of strength and toughness.

关键词： Orthotropic steel deck Local thickened U-rib Hot roll-forming process Warm roll-forming process Microstructural evolution Deformation behavior

Effects of nanofiller and voltage stabilizer on partial discharge resistance of polypropylene/elastomer blends:A comparison study

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High Voltage 2023年第2期8卷 251-261页

作者： Yu Gao Jing Li Xuri Xu Jinjing Peng tao han Boxue Du School of Electrical and Information Engineering Tianjin UniversityTianjinChina State Grid Yancheng Power Supply Company YanchengChina Guangzhou Panyu Power Supply Bureau Guangzhou Power Grid CorporationGuangzhouChina

This paper reports on the individual and synergistic influence mechanisms of nano-silica(SiO_(2))and voltage stabilizers on partial discharge(PD)resistance of polypropylene blended with ethylene-octene copolymer *** SiO_(2)nanoparticles and three types of voltage stabilizers,that is,benzoin,4,40-dimethoxybenzil,and 3-aminobenzoic acid are selected as fillers to prepare *** is initiated in a rod-to-plane electrode system with an alternating current voltage of 5 *** characteristics are captured with multi-sensors,and the erosion profile of the test sample is measured using a three-dimensional(3D)optical *** trap distribution is extracted with isothermal surface potential decay measurement to assist the analysis of PD eroding *** transform infrared spectrum,scanning electron microscopy,X-ray diffraction spectrum,and differential scanning calorimetry analysis are performed to reveal the change in material structures caused by the *** results indicate that the PD resistance of the blend can be improved by the addition of nano-SiO_(2)and voltage stabilizers individually and *** PD resistance of PO is increased by 71.2%at most in the sample with 3 wt%nano-SiO_(2)*** sample filled with SiO_(2)exhibits better PD resistance than that with the voltage stabilizer or co-added,which should be ascribed to the introduction of deep traps,the formation of the packaged layer,the suppression of oxygen diffusion of the nanofillers,and the good compatibility between additives and the polymer matrix.

关键词： polypropylene synergistic blends

AppleQSM:Geometry-Based 3D Characterization of Apple Tree Architecture in Orchards

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Plant Phenomics 2024年第3期6卷 737-754页

作者： Tian Qiu tao Wang tao han Kaspar Kuehn Lailiang Cheng Cheng Meng Xiangtao Xu Kenong Xu Jiang Yu School of Electrical and Computer Engineering Cornell UniversityIthacaNYUSA Institute of Statistics and Big Data Renming University of ChinaBeijingChina Department of Ecology and Evolutionary Biology Cornell UniversityIthacaNYUSA School of Integrative Plant Science Cornell UniversityIthacaNYUSA Center for Applied Statistics Renmin University of ChinaBeijingChina School of Integrative Plant Science Cornell University.IthacaNYUSA

The architecture of apple trees plays a pivotal role in shaping their growth and fruit-bearing potential,forming the foundation for precision apple ***,2D imaging technologies were employed to delineate the architectural traits of apple trees,but their accuracy was hampered by occlusion and perspective *** study aimed to surmount these constraints by devising a 3D geometry-based processing pipeline for apple tree structure segmentation and architectural trait characterization,utilizing point clouds collected by a terrestrial laser scanner(TLS).The pipeline consisted of four modules:(a)data preprocessing module,(b)tree instance segmentation module,(c)tree structure segmentation module,and(d)architectural trait extraction *** developed pipeline was used to analyze 84 trees of two representative apple cultivars,characterizing architectural traits such as tree height,trunk diameter,branch count,branch diameter,and branch *** results indicated that the established pipeline attained an R^(2)of 0.92 and 0.83,and a mean absolute error(MAE)of 6.1cm and 4.71mm for tree height and trunk diameter at the tree level,***,at the branch level,it achieved an R^(2)of 0.77 and 0.69,and a MAE of 6.86 mm and 7.48°for branch diameter and angle,*** accurate measurement of these architectural traits can enable precision management in high-density apple orchards and bolster phenotyping endeavors in breeding ***,bottlenecks of 3D tree characterization in general were comprehensively analyzed to reveal future development.

关键词： architecture tree tion appleqsm character geometry-based orchards

Degradation of micropolluants in flow-through VUV/UV/H2O2 reactors: Effects of H2O2 dosage and reactor internal diameter

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Journal of Environmental Sciences 2021年第12期33卷 28-37页

作者： Lumeng Zhan Wentao Li Li Liu tao han Mengkai Li Zhimin Qiang 无 Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Department of Geosciences and Natural Resource Management University of CopenhagenFrederiksberg C 1985Denmark Sino-Danish College University of Chinese Academy of SciencesBeijing 100049China School of Environmental Science and Engineering Qingdao UniversityQingdao 266071China

The degradation of atrazine (ATZ),sulfamethoxazole (SMX) and metoprolol (MET) in flowthrough VUV/UV/H2O2reactors was investigated with a focus on the effects of H2O2dosage and reactor internal diameter (ID).Results showed that the micropollutants were degraded efficiently in the flow-through VUV/UV/H2O2reactors following the pseudo first-order kinetics (R2>0.92).However,the steady-state assumption (SSA) kinetic model being vital in batch reactors was found invalid in flow-through reactors where fluid mixing was less *** the increase of H2O2dosage,the ATZ removal efficiency remained almost constant while the SMX and MET removal was enhanced to different extents,which could be explained by the different reactivities of the pollutants towards HO·.A larger reactor ID resulted in lower degradation rate constants for all the three pollutants on account of the lower average fluence rate,but the change in energy efficiency was much more *** reality,the electrical energy per order (EEO) of the investigated VUV/UV/H2O2treatments ranged between 0.14–0.20,0.07–0.14 and 0.09–0.26 k Wh/m3/order for ATZ,SMX and MET,respectively,with the lowest EEOfor each pollutant obtained under varied H2O2dosages and reactor *** study has demonstrated the efficiency of VUV/UV/H2O2process for micropollutant removal and the inadequacy of the SSA model in flow-through reactors,and elaborated the influential mechanisms of H2O2dosage and reactor ID on the reactor performances.

关键词： VUV/UV/H2O2 Flow-through reactor Degradation H2O2 dosage Reactor internal diameter

Performance Analysis of Anti-Interference Wireless Packet Networks for LEO Micro-Satellite with Adaptive Nulling Antenna Array

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The Journal of China Universities of Posts and Telecommunications 2006年第2期13卷 10-14页

作者： LIU Hai-tao han Fang-jing WAN Jian-wei School DSP Group of National University of Defense Technology Changsha 410073 P.R. China

Information integrity is key to successful operations in intricacy environments in the future, especially when strong interferences exist. This paper presents the design of a novel wireless packet network receiver system for Low Earth Orbit （LEO） micro-satellites with adaptive nulling antenna arrays. It uses three types of interference suppression in cascade： namely spread spectrum, adaptive array nulling, and transform domain filtering. This paper proposes a pilot channel-aided method in order to make full advantage of this arrangement, and analyzes its throughput and delay performance using the Markov chain model. Our results show that this method can achieve excellent delay and throughput performance： When the number of array antenna is 8, its throughput increase relative to the standard Slot-ALOHA protocol is 125 96.

关键词： LEO adaptive array ALOHA packet radio networks

Lamb wave sensors array for nonviscous liquid sensing

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Science China(Physics,Mechanics & Astronomy) 2006年第4期49卷 461-472页

作者： CHEN Zhijun han tao JI Xiaojun GUO Huawei SHI Wenkang Department of Instrumentation Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Instrumentation Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Instrumentation Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Instrumentation Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Instrumentation Engineering Shanghai Jiao Tong University Shanghai 200240 China

The interdigital transducer (IDT) can excite Lamb wave in a piezoelectric plate loading with a liquid layer, and the phase velocity of Lamb wave is associated with the properties of the liquid layer. In this paper, the concept of effective permittivity is introduced to study the Lamb wave's potential application in liquid sensing. Considering the measuring of ideal nonviscous liquid, the sensors array is designed to sense the density and the dielectric constant of the liquid layer simultaneously. Using LiNbO3 as piezoelectric material, in order to improve the sensors array sensitivity and the electro-mechanical coupling coefficient, the optimized results including plate thicknesses and cut orientations are presented by numerical simulation. These studies show that the Lamb wave sensors array can be potential in liquid sensing.

关键词： Lamb wave sensors array, density, dielectric constant, plate thickness, cut orientation.

Insulation condition forewarning of form-wound winding for electric aircraft propulsion based on partial discharge and deep learning neural network

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High Voltage 2021年第2期6卷 302-313页

作者： Yalin Wang Jiandong Wu tao han Kiruba Haran Yi Yin Department of Electrical Engineering Shanghai Jiao Tong UniversityShanghaiChina Key Laboratory of Control of Power Transmission and Conversion(SJTU) Ministry of EducationShanghaiChina Department of Electrical and Computer Engineering University of Illinois Urbana-ChampaignUrbanaIllinoisUSA Department of Instrument Science and Engineering Shanghai Jiao Tong UniversityShanghaiChina

Form-wound windings in electric machines designed for electric aircraft propulsion face reliability challenges due to the severe operating environment,such as high temperature and low *** study proposes a forewarning method for insulation condition monitoring of form-wound windings based on partial discharge(PD)and deep learning neural *** PD features are extracted from the PD profile,which provides information about physics-of-failure and reflects the degree of insulation *** algorithm fusion extracted from auto-encoder and long short-term recurrent neural network is proposed to synthesize one failure precursor from these three features and make multi-time-step prediction through historical data to provide *** electrical and thermal accelerated ageing test is performed on the form-wound windings at 0.2 atm to simulate working environment of electric *** proposed method is validated on the accelerated ageing dataset and shows better prediction accuracy than some existing time-series prediction methods,indicating the advantages of the proposed ***,an on-line hardware setup using a deep learning processor is rec-ommended to implement the forewarning *** proposed approach has the potential to be widely applied to other insulation systems and contribute to work on condition monitoring.

关键词： network processor neural

Magnetic resonance imaging-guided and targeted theranostics of colorectal cancer

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Cancer Biology & Medicine 2020年第2期17卷 307-327页

作者： Yanan Li Jingqi Xin Yongbing Sun tao han Hui Zhang Feifei An Department of Radiology First Hospital of Shanxi Medical UniversityTaiyuan 030001China institute of Medical Engineering Department of BiophysicsSchool of Basic Medical ScienceHealth Science CenterXi’an Jiaotong UniversityXi’an 710061China Division of Pharmaceutics National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal MedicineJiangxi University of Traditional Chinese MedicineNanchang 330006China College of Chemistry and Life Science Institute of Functional MoleculesChengdu Normal UniversityChengdu 611130China

Colorectal cancer(CRC)is the most common gastrointestinal tract cancer worldwide and is associated with high morbidity and *** development of nanosized drug delivery systems has provided a new direction in CRC *** these systems,magnetic nanoparticle(MNP)-based multifunctional platforms provide a novel strategy for magnetic resonance imaging(MRI)-related cancer *** the beginning o f this original review,the carcinogenesis and treatment status o f CRC are ***,diversified preparation and functionalization methods of MNPs are systematically analyzed,followed by MRIinvolved theranostic *** latest progress in MRI-mediated multimode diagnosis and image-guided targeted therapy in CRC management is the main ***,the major challenges in promoting MRI-induced precise theranostics of CRC in clinical practice are discussed.

关键词： Carcinogenesis colorectal cancer magnetic resonance imaging multimodal diagnosis targeted theranostics