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Distribution pattern of pelagic amphipods and its affecting facors in the East China Sea

Acta Oceanologica Sinica 2006年第5期25卷 112-119页

作者： xu zhaoli jiang mei Key and Open Laboratory of Marine and Estuary Fisheries of Ministry of Agriculture East China Sea Fisheries Research Insti-tute Chinese Academy of Fisheries Sciences Shanghai 200090 China

On the basis of data from four seasonal cruises in the East China Sea （23°30′-33°N, 118°30′-128°E） from 1997 to 2000, horizontal distribution of amphipods, seasonal variations of abundance and their dynamic mechanisms were approached with quantitative and qualitative methods. Results showed that the average value of amphipod abundance in autumn was 115× 10^-2 ind./m^3, the highest in four seasons. The second occurred in summer with a mean value of 44×10^-2 ind./m^3and the lowest occurred in spring with a mean of 10 × 10^-2 ind./m^3. Amphipods were hardly observed in the north nearshore （ 29° 30′- 33° N and 122°30′- 125°E） in winter and spring. In all seasons, except for the north of the sea in autumn and the south in summer, the abundance in the offshore area was higher than that nearshore. The major species influencing the amphipod abundance were Lestrigonus schizogeneios in spring, L. macrophthalmus and L schizogeneios in summer,L bengalensis and Hyperioides sibaginis in autumn and Gammarus sp. in winter. The amphiped abundance showed a prominent linear correlation with the surface water temperature, but no significant correlation with both other water temperatures and salinity in spring. It was found that water temperature and salinity were not significantly correlated with the variation of amphiped abundance in summer, autumn and winter. In addition, the amphiped abundance in all four seasons can be linearly correlated with the bottom water temperature. The highest abundance area was located in the mixture waters near the side of warm water current in summer. Peak of amphiped abundance in autumn, not in summer told a temporal process for amphipeds to develop their populations. The continuance of warm current was beneficial to the development of amphipod abundance from summer to autumn. Amphipeds are kinds of very important diets for fishes in the offshore East China Sea.

关键词： East China Sea zooplankton pelagic amphipods abundance distribution

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Multi-model ensemble learning for battery state-of-health estimation:Recent advances and perspectives

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Journal of Energy Chemistry 2025年第1期 739-759页

作者： Chuanping Lin Jun xu Delong jiang Jiayang Hou Ying Liang Zhongyue Zou xuesong mei State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Shaanxi Key Laboratory of Intelligent Robots School of Mechanical Engineering Xi'an Jiaotong University Department of Electrical Engineering and Automation Luoyang Institute of Science and Technology School of Mechanical Engineering Hangzhou Dianzi University

The burgeoning market for lithium-ion batteries has stimulated a growing need for more reliable battery performance monitoring. Accurate state-of-health(SOH) estimation is critical for ensuring battery operational performance. Despite numerous data-driven methods reported in existing research for battery SOH estimation, these methods often exhibit inconsistent performance across different application scenarios. To address this issue and overcome the performance limitations of individual data-driven models,integrating multiple models for SOH estimation has received considerable attention. Ensemble learning(EL) typically leverages the strengths of multiple base models to achieve more robust and accurate outputs. However, the lack of a clear review of current research hinders the further development of ensemble methods in SOH estimation. Therefore, this paper comprehensively reviews multi-model ensemble learning methods for battery SOH estimation. First, existing ensemble methods are systematically categorized into 6 classes based on their combination strategies. Different realizations and underlying connections are meticulously analyzed for each category of EL methods, highlighting distinctions, innovations, and typical applications. Subsequently, these ensemble methods are comprehensively compared in terms of base models, combination strategies, and publication trends. Evaluations across 6 dimensions underscore the outstanding performance of stacking-based ensemble methods. Following this, these ensemble methods are further inspected from the perspectives of weighted ensemble and diversity, aiming to inspire potential approaches for enhancing ensemble performance. Moreover, addressing challenges such as base model selection, measuring model robustness and uncertainty, and interpretability of ensemble models in practical applications is emphasized. Finally, future research prospects are outlined, specifically noting that deep learning ensemble is poised to advance ens

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MULTIPLE TEMPERATURE GAS DYNAMIC EQUATIONS FOR NON-EQUILIBRIUM FLOWS

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Journal of Computational Mathematics 2011年第6期29卷 639-660页

作者： Kun xu zhaoli Guo Mathematics Department Hong Kong University of Science and Technology Hong Kong China National Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 China

In an early approach, a kinetic model with multiple translational temperature [K. xu, H. Liu and J. jiang, Phys. Fluids 19, 016101 （2007）] to simulate non-equilibrium flows was proposed. In this paper, instead of using three temperatures in the x, y and z-directions, we define the translational temperature as a second-order symmetric tensor. Under the new framework, the differences between the temperature tensor and the pressure tensor will be explicitly pointed out. Based on a multiple stage BGK-type collision model and the Chapman-Enskog expansion, the corresponding macroscopic gas dynamics equations in three-dimensional space will be derived. The zeroth-order expansion gives 10 moment closure equations similar to that of Levermore [C.D. Levermore, J. Stat. Phys 83, pp.1021 （1996）]. The derived gas dynamic equations can be considered as a regularization of the 10 moments equations in the first-order expansion. The new gas dynamic equations have the same structure as the Navier-Stokes equations, but the stress-strain relationship in the Navier-Stokes equations is replaced by an algebraic equation with temperature differences. At the same time, the heat flux, which is absent in Levermore＇s 10 moment closure, is recovered. As a result, both the viscous and the heat conduction terms are unified under a single anisotropic temperature concept. In the continuum flow regime, the new gas dynamic equations automatically recover the standard Navier-Stokes equations. Our gas dynamic equations are natural extensions of the Navier-Stokes equations to the near continuum flow regime and can be used for microfiow computations. Two examples, the force-driven Poiseuille flow and the Couette flow in the transition flow regime, are used to validate the model. Both analytical and numerical results are presented. Theoretically, the Boltzmann equation can be also applied to the current multiple stage gas evolution model to derive generalized macroscopic governing equations in the near co

关键词： Gas-kinetic Model Multiple Translational Temperatures Generalized GasDynamics Equations.

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Sensitive and rapid detection of two toxic microalgae Alexandrium by loop-mediated isothermal amplification

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Acta Oceanologica Sinica 2012年第2期31卷 139-146页

作者： ZHANG Fengying SHI Yanhong jiang Keji xu zhaoli MA Lingbo East China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesShanghai 200090China Key and Open Laborutory of Marine and Estuarine Fisheries Ministry of Agriculture of ChinaShanghai 200090China

A loop-mediated isothermal amplification （LAMP） assay was designed and evaluated for rapid de- tection of the toxic microalgae Alexandrium catenella and A. minutum, which can produce paralytic shellfish poisoning （PSP）. Two sets of four specific primers targeting these two species were derived from the sequence of internal transcribed spacer （ITS） of ribosomal DNA. The method worked well in less than an hour under isothermal conditions of 65℃. LAMP specificity was validated in closely related algae as a comparison, suggesting the strict specificity of the LAMP primers. Two visual inspection approaches were feasible to interpret the positive or negative results. The detection lim- its of A. catenella and A. minutum samples using the LAMP assay were found to be 5.6 and 4.5 pg DNA, respectively. The sensitivity of this LAMP assay was 10 or 100-fold higher than Polymerase Chain Reaction （PCR） method in detecting the two microalgae. These characteristics of species specificity, sensitivity, and rapidity suggest that this method has the potentiality in the monitoring of red tide caused by A. catenella and A. minutum.

关键词： Alexandrium eatenella Alexandrium minutum detection loop-mediated isothermal amplification (LAMP) ribosomal DNA internal transcribed spacer (ITS)

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Deep dynamical processes in the central-southern Qinghai-Tibet Plateau—Receiver functions and travel-time residuals analysis of north Hi-Climb

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Science China Earth Sciences 2008年第9期51卷 1297-1305页

作者： LI HaiOu xu XiWei jiang mei Institute of Geology China Earthquake AdministrationBeijing 100029China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China

Teleseismic receiver functions and travel-time residuals along the north Hi-Climb broadband seismic array in the central-southern Qinghai-Tibet Plateau show that the lithosphere structures in the central and western Qinghai-Tibet Plateau are different. In the central Qinghai-Tibet Plateau, the Indian Plate is northward subducted beneath the Qiangtang block and arrives at the greatest depth beneath the central-southern Qiangtang block. The delaminated Indian lithospheric slab remains beneath the central Lhasa block to a depth possibly greater than that of the upper interface of the mantle transform zone. In the western Qinghai-Tibet Plateau, the Indian lithospheric plate is gently northward subducted and may have arrived to the south of Tarim plate. Due to the resistance from the gently northward subduction of the Indian mantle lithosphere in the western Qinghai-Tibet Plateau, the upwelling mantle material be-neath the Qiangtang block moves mostly toward the east to bring about the lateral eastward flow of the deep mantle hot material in the central Qinghai-Tibet Plateau.

关键词： travel-time residual receiver function lithosphere structure delamination Qiangtang block Bangong-Nujiang Suture

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Deformation Behavior of Medium-strength TA18 High-pressure Tubes During NC Bending with Different Bending Radii

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Chinese Journal of Aeronautics 2011年第5期24卷 657-664页

作者： jiang Zhiqiang ZHAN mei YANG He xu xudong LI Guangjun School of Materials Science and Engineering State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi ＇an 710072 China Chengdu Aircraft Industry （Group） Corporation Ltd. Chengdu 610092 China

To improve the forming quality and forming limit of the numerical control （NC） bending of high-pressure titanium alloy tubes, in this study, using three-dimensional （3D） finite element method, deformation behavior of medium-strength TA 18 high-pressure tubes during NC bending with different bending radii is investigated. The results show that the cross-sectional deformation and the wall thickness variation during NC bending of TA18 tubes using a small bending radius （less than 2 times of tube outside diameter） are clearly different from that using a normal bending radius （between 2 and 4 times of tube outside diameter）. For bending with a normal bending radius, with or without a mandrel, the distribution of the flattening in the bending area resembles a platform and an asymmetric parabola, respectively. For bending with a small bending radius, with or without a mandrel, the flattening both distributes like a parabola, but the former has a stable peak which deflects toward the initial bending section, and the latter has a more pronounced peak with a bending angle and deflects slightly toward the bending section. The wall thickness variations with a normal bending radius, with and without a mandrel, both resemble a platform when the bending angle exceeds a certain angle. For the bending with a small radius, the distribution of the wall thickness variation without a mandrel follows an approximate parabola which increases in value as the bending angle increases. If a mandrel is used, the thickening ratio increases from the initial bending section to the bending section.

关键词： titanium alloy tubes deformation behaviors numerical control bending finite element method normal bending radius small bending radius

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PFAS in PMs might be the escalating hazard to the lung health

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Nano Research 2023年第12期16卷 13113-13133页

作者： Yue Pan Jie mei Jipeng jiang Ke xu Xinglong Gao Shasha jiang Ying Liu Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450052China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Thoracic Surgery the First Medical Center of Chinese PLA General HospitalBeijing 100853China

Atmospheric particulate matter(PM)is a dominant source of air pollution,in particular,molecules less than 2.5μm in diameter,endangering human *** estimated 2.1 million deaths from exposure to PM2.5 and 700,000 cases of respiratory disease caused by atmospheric pollution were reported on an annual *** main components of PM2.5 include heavy metal elements,water-soluble ions,carbon aerosols,ozone,and organic ***-and polyfluoroalkyl substances(PFASs)are a large group of representative pollutants among the organic compounds absorbed in *** are widely used in industrial production and hardly degraded in the environment,resulting in their accumulation in water,food,and air,and abosorbed by humans via ingestion and *** the other hand,accumulation of PFAS in the human body is proving to be associated with some unfavorable health outcomes,whereas the mechanisms underlying the effects of PFAS exposure on human lung diseases remain unclear at *** toxicological effects of organic components are a significant focus of *** review will fix our attention on the changes in the distribution,composition,and content of PFAS in PM2.5 by location and year,and provide an overview on the influence of PM2.5 and PFAS on lung health,with indications of possible synergistic adverse effects of PM2.5 and PFAS on pulmonary homeostasis.

关键词： PM2.5 per-and polyfluorinated alkyl substances(PFASs) lung pulmonary homeostasis environment pollution

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Deformation behavior and microstructural evolution in ultra-highstrength dual-phase(UHS-DP1000)steel with different strain rates

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Journal of Iron and Steel Research International 2019年第2期26卷 173-181页

作者： mei xu Hui Li Rui-ting jiang Di Tang Hai-tao jiang Zhen-li Mi Institute of Engineering Technology University of Scienee and Technology BeijingBeijing 100083China College of Engineering Yantai Nanshan UniversityYantai 265700ShandongChina Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China

The dynamic tensile behavior and deformation mechanism of ultra-high-strength dual-phase(UHS-DP1000)steel were investigated over a wide range of strain rates from 10^-4 to 10^3 s^-*** the strain rate increases,the transition strain decreases from 2.73 to 1.92,and the martensite plastic deformation starts *** strain rate of 10^-4-0.5 s^-l,the inhomogeneous plastic deformation ability increases because the dislocation density in the ferrite matrix *** leads to a decrease in uni form elongation and an increase in fracture *** the strain rate increases from 0.5 to 500s^-*** amount of mobile dislocation increases,which is the main reason for the enhancing uniform elongation and fracture *** nwhile,because the dislocation motio n resistance rapidly in creases,the yield strength and ultimate tensile strength also *** the strain rate is higher than 500 s^-*** hardening behavior caused by the dislocation motion resistance has not been offset by softening due to the mobile dislocation and adiabatic *** voids at the early stage of deformation could not uniformly form and grow,and thus the homogeneous plastic deformation ability decreases.

关键词： Ultra-high-strength dual-phase steel Strain rate Microstructural evolution Void Adiabatic heating

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Numerically controlled bending performance of medium strength TA18 titanium alloy tubes under different die sets

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Science China(Technological Sciences) 2011年第4期54卷 841-852页

作者： ZHAN mei jiang ZhiQiang YANG He xu xuDong LI GuangJun State Key Laboratory of Solidification Processing College of Materials Science and EngineeringNorthwestern Polytechnical UniversityP.O.Box Xi'an 00China Chengdu Aircraft Industry(Group) Corporation Ltd Chengdu 610092China

The rapid development of aviation and aerospace technologies has led to increased interest in the application of numerically controlled(NC) technology for bending light-weight titanium alloy *** order to study and develop advanced NC bending technology,it is necessary to understand the bending performance of medium strength TA18(Ti-3Al-2.5V,ASTM Gr.9) titanium alloy tubes during NC bending under different die *** paper focuses on the bending performance of medium strength TA18 tubes under different NC bending die sets,including the variations in the stress,strain,wall thickness,cross sectional deformation,and *** results show that adding a wiper die to the base die set decreases the radial,hoop,and tangential compressive stress and the tangential compressive strain,and adding a mandrel to the base die set also decreases these stresses,but increases the radial and hoop tensile stress and decreases the hoop compressive strain obviously,and brings about a three-dimensional tensile stress concentration where the mandrel provides *** the NC bending of medium strength TA18 tubes,the flattening of cross section is more sensitive index than the thinning of wall *** a mandrel can improve the flattening of cross section obviously but it has a little worse effect on the thinning of wall thickness,and adding a wiper die to the base die set can inhibit the occurrence of the inside bulge but worsen the flattening of the cross section *** the above effects of the mandrel and wiper die on bending performance,it is reasonable to apply the die set comprising a bending die,clamp die,and pressure die for tubes with a small diameter and the die set including an appropriate mandrel additionally for tubes with a larger diameter,in order to bend the medium strength TA18 tubes with high quality and at low cost.

关键词： bending performance medium strength titanium alloy tube numerically controlled bending die set

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RNA interference in Colorado potato beetle(Leptinotarsa decemlineata): A potential strategy for pest control

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Journal of Integrative Agriculture 2020年第2期19卷 428-437页

作者： MA mei-qi HE Wan-wan xu Shi-jing xu Le-tian ZHANG jiang State Key Laboratory of Biocatalysis and Enzyme Engineering College of Life SciencesHubei University

Colorado potato beetle(CPB),Leptinotarsa decemlineata,is a notorious destructive pest that mainly feeds on the leaves of potato and several other solanaceous *** is widely recognized for its adaptation to a remarkable variety of host plants and diverse climates,and its high resistance to insecticides and Bacillus thuringiensis *** interference(RNAi)is a sequence-specific,endogenous gene silencing mechanism evoked by small RNA molecules that is used as a robust tool for virus and pest *** has been extensively tested for CPB management by employing various target genes and delivery *** article reviews the screening of RNAi target genes,efficient RNAi delivery systems,and factors affecting RNAi efficiency in CPB,which may help understand the mechanisms of RNAi and its application in CPB control strategy.

关键词： Colorado potato beetle double-stranded RNA pest control RNA interference RNAi delivery system

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