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SECOND-ORdeR DRIFT FORCES AND MOMENTS BETWEEN TWO SUBMERGED BODIES IN WAVES ON 3D METHOD

Journal of Hydrodynamics 2005年第1期17卷 117-124页

作者： WANGJian-fang liji-de HAOJin-feng CAIXin-gong SchoolofShipbuildingEngineering HarbinEngineeringUniversityHarbin150001China ChinaShipdesignandResearchCenterCo. LtdBeijing100085China MarinedesignandResearchInstituteofChina Shanghai200011China

Two near field methods, namely the integral method and differential method, were presented for giving second order mean drift forces and moments between two fixed submerged bodies in regular waves. For the integral method, with a series of mathematical manipulations, second order drift forces and moments could be easily expressed by distributed sources which could be calculated by source distribution techniques with the assumption that the amplitude of ship motions are small on the basis of the linear 3D frequency theory. For the differential method, drift forces and moments could be expressed by the derivative of velocity potential with respect to space coordinate. Because two bodies would behave as a single body while the clearance is very large, the numerical results of one sphere in such case were given and compared with analytical results of a single sphere which does not involve the effect of free surface. When submerged depth becomes enough large, a good agreement can be reached. Then the integral method was used to predict the second order drift forces and moments of two submerged spheres and spheroids with a small lateral separation distance in waves compared with the numerical results obtained by the differential method and they agree well. By comparison, it indicates the interaction effects between two submerged bodies have a profound influence on the drift forces and moments. In this paper, the forward speed effect on submerged spheres was also considered.

关键词： near-field method integral method differential method mean drift forces and moments two submerged bodies 3D source distribution technique

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Coupled motions of two ships in irregular waves in time domain

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Journal of Marine Science and Application 2004年第2期3卷 1-6页

作者： WANGJian-fang liji-de WENGNian-ming GUANLing-xuan SchoolofShipbuildingEngineering HarbinEngineeringUniversityHarbin150001China

A three-dimensional time domain approach is used to study the aves. In this approach ,the boundary condition is satisfied on the mean wetted hull surface of the moving bodies and the free surface condition is linearized. The problem is solved by using a transient free-surface Green function source distribution on the submerged hulls. After solving the response amplitude operator ,the method of spectral analysis is employed to clearly express the motion energy spectrum and significant amplitude of two ships. For verifying the code .two same circular cylinders at beam wave are selected to calculate coupled motions by comparison with the results obtained by 3Dfrequcy method which has been proved to be efficient for solving such problems. Two Wigley ships of different sizes with the same forward speed are chosen for numerical calculation of the interaction effect, and some useful suggestions ate obtained for underway replenishment at sea.

关键词： 3D时域耦合运动光谱分析海上补给

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Hydrodynamic interactions between two bodies in waves in 3D time domain

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Journal of Marine Science and Application 2005年第1期4卷 15-20页

作者： WANGJian-fang liji-de CAIXin-gong TIANMing-qi HaoJin-feng SchoolofShipbuildingEngineering HarbinEngineeringUniversityHarbin150001China Marinedesign＆ResearchInstituteofChina Shanghai200011China ChinaShipdesign＆ResearchCenterCo. LtdBeifing100085China

In this paper, a 3D time domain technique is adopted to calculate the coupled hydrodynamic interaction between two bodies without flare in waves. For verifying the code, two same cylinders are selected to calculate coupled hydrodynamic effects by comparison with the results obtained by 3D frequency method which has been proved to be efficient for solving such problems. In order to improve efficiency of calculation, the effect of history time has been discussed, and an improved method is presented. Moreover, the effect of lateral separation distance is also discussed in detail. The technique developed here may serve as a more rigorous tool to analyze the related transient problems of two ships doing underway replenishment in waves.

关键词： 3D time domain hydrodynamic interaction underway replenishment

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The Inhibitory Effect of Oxymatrine on Hepatitis C Virus in vitro

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胃肠病学 2000年第B8期5卷 134-135页

作者： ChenYing-xuan liji-qiang ZengMin-de LuLun-gen Qiude-kai MaoYi-min FanZhu-ping HuaJing ShanghaiInstituteofDigestiveDisease ShanghaiSecondMedicalUniversityShanghai200001China

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The Inhibitory Effect of Oxymatrine on Hepatitis B Virus in vitro

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胃肠病学 2000年第B8期5卷 189-190页

作者： ChenYing-xuan liji-qiang ZengMin-de LuLun-gen Qiude-kai MaoYi-min FanZhu-ping HuaJing Qiude-kai MaoYi-minFanZhu-pingHuaJingShanghaiInstituteofDigestiveDiseaseShanghaiChina

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Oligodendroglial heterogeneity in health,disease,and recovery:deeper insights into myelin dynamics

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Neural Regeneration Research 2025年第11期20卷 3179-3192页

作者： Pieter-Jan Serneels Julie D.de Schutter Lies de Groef Lieve Moons Steven Bergmans KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionNeural Circuit Development&Regeneration Research GroupLeuvenBelgium KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionCellular Communication&Neurodegeneration Research GroupLeuvenBelgium

decades of research asserted that the oligodendroglial lineage comprises two cell types:oligodendrocyte precursor cells and ***,recent studies employing single-cell RNA sequencing techniques have uncovered novel cell states,prompting a revision of the existing *** forward,the oligodendroglial lineage should be delineated into five distinct cell states:oligodendrocyte precursor cells,committed oligodendrocyte precursor cells,newly formed oligodendrocytes,myelin-forming oligodendrocytes,and mature *** new classification system enables a deeper understanding of the oligodendroglia in both physiological and pathological *** this uniform terminology will facilitate comparison and integration of data across ***,including the consolidation of findings from various demyelinating models,is essential to better understand the pathogenesis of demyelinating ***,comparing injury models across species with varying regenerative capacities can provide insights that may lead to new therapeutic strategies to overcome remyelination ***,by standardizing terminology and synthesizing data from diverse studies across different animal models,we can enhance our understanding of myelin pathology in central nervous system disorders such as multiple sclerosis,Alzheimer's disease,and amyotrophic lateral sclerosis,all of which involve oligodendroglial and myelin dysfunction.

关键词： animal models demyelination fish mammals multiple sclerosis myelin neurodegeneration oligodendrocytes oligodendroglial lineage remyelination

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MIP FORMULATIONS AND HEURISTICS FOR SOLVING PARALLEL BATCHING PROBLEMS

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Journal of Systems Science & Complexity 2010年第5期23卷 884-895页

作者： Udo BUSCHER liji SHEN Chair of Industrial Management Department of Business Administration and Economics Dresden University of Technology ( Technische Universitaet Dresden) Dresden 01062 Germany.

This paper addresses the scheduling problem involving batch processing machines, which is Mso known as parallel batching in the literature. The presented mixed integer programming formulation first provides an elegant model for the problem under study. Fhrthermore, it enables solutions to the problem instances beyond the capability of exact methods developed so far. In order to alleviate computational burden, the authors propose MIP-based heuristic approaches which balance solution quality and computing time.

关键词： Batching decisions mixed integer programming scheduling.

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Enantioselective reductive conjugate alkenylation of α,β-enones with keto alkenyl acetates by nickel catalysis

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Science China Chemistry 2025年第1期68卷 157-162页

作者： Rong-de He Yun-Lei Luo Qiu-Quan Pan Qi-Wei Yao Xing-Zhong Shu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University

Reactions involving alkenyl acetates offer cost-effective and environmentally friendly routes for alkene synthesis, yet their asymmetric variant remains elusive. Concurrently, asymmetric conjugate alkenylation predominantly centered on nucleophilic addition using alkenyl–M. This manuscript presents an asymmetric reductive conjugate alkenylation reaction involving alkenyl acetates. The method facilitates the enantioselective addition of keto alkenyl groups to α,β-enones, resulting in the formation of unsaturated diketones—a class of useful structural motifs that are challenging to access otherwise. The use of electron-rich Pyroxy ligand is essential for achieving both high reaction efficiency and enantioselectivity.

关键词： nickel alkenylation asymmetric cross-coupling alkenes

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Analysis of fault detection method based on predictive filter approach

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Science in China(Series F) 2005年第3期48卷 335-353页

作者： liji ZHANGHongyue SchoolofAutomationScience&ElectricalEngineering BeihangUniversityBeijing100083China

A new detection method for component faults based on predictive filters together with the fault detectability, false alarm rate, missed alarm rate and upper bound of detection time are proposed. The efficiency of the method is illustrated by a simulation example of a second-order system. It is shown that the fault detection method using predictive filters has a small delay, a low false alarm rate and a low missed alarm rate. Furthermore the filter can give accurate estimates of states even after a fault occurs. The real-time estimation provided by this method can also be used for fault tolerant control.

关键词： fault detection nonlinear systems predictive filters false alarm rate missed alarm rate detection time.

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Regional cerebral metabolic changes after acupuncture by FDG PET: effects and methodology

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Nuclear Science and Techniques 2002年第4期13卷 224-229页

作者： GUANYi－Hui liji 等 PETCenter HuashanHospitalFudanUniversityShanghai2000235 departmentofChineseTraditionalMedicine HuashanHospitalFudanUniversityShanghai200040 PETCenter HuashanHospitalFudanUniversi

In order to investigate the therapeutic mechanisms of acupuncture points in cerebrovascular ischemic patients and normal volunteers, FDG PET was adopted. Changes in cerebral glucose metabolism and cerebral functional activity before and after electro-acupuncture treatment were studied in 12 normal volunteers and 11 cerebrovascular ischemic patients. The PET imaging was read by visual interpretation and calculated by semi-quantitative analysis. After acupuncture, cerebral glucose metabolism of the normal group is higher in the frontal lobe, temporal lobe, thalamus bilaterally and cerebellum contralaterally. The cerebrovascular ischemic patients had manifested greater response in their lesions than in their normal regions of the two tested groups, as well as than in their normal regions of the whole brain, after acupuncture treatment. The study shows that the regulatory effects of acupuncture on the central nervous system influence the brain at multiple-sections, multiple-directions and multiple-levels of brain function. Itconforms to the holistic and bi-directions regulatory laws of acupuncture.

关键词：正电子发射造影脑葡萄糖代谢物针灸

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