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The Average Value Inequality in Sequential Effect Algebras

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Acta Mathematica Sinica,English Series 2010年第5期26卷 831-836页

作者： Jun SHEN Jun de wu department of Mathematics Zhejiang University Hangzhou 310027 P. R. China department of Mathematics Anhui Normal University Wuhu 241003 P. R. China

A sequential effect algebra （E, 0, 1, ,o） is an effect algebra on which a sequential product o with certain physics properties is defined; in particular, sequential effect algebra is an important model for studying quantum measurement theory. In 2005, Gudder asked the following problem： If a, b E （E, 0, 1, , o） and a⊥b and a o b⊥a o b, is it the case that 2（a o b） ≤ a2 b2 ？ In this paper, we construct an example to answer the problem negatively.

关键词： effect algebras sequential effect algebras average value inequality

Stability of the Stratification of Water Bodies in the North Passage of the Yangtze River Estuary Based on the EFDC Model

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Journal of Ocean University of China 2024年第1期23卷 23-32页

作者： wu de’an LI Xin WANG Yigang College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China Tianjin Research Institute For Water Transport Engineering Tianjin 300456China

To study the stratified stability of a water column in the North Passage of the Yangtze River Estuary,a numerical model of the hydrodynamics of this estuary is established using the EFDC *** the basis of EFDC results,this paper derives and pro-vides the discriminative index of water body stability caused by salinity and analyzes the along-range variation in water body strati-fication stability in the North Passage of the Yangtze River Estuary and the periodic variation at a key location(bend area)based on the simulation results of the numerical *** work shows that the water body in the bend area varies between mixed and strati-fied types,and the vertical average flow velocity has a good negative correlation with the differential velocity between the surface and bottom layers of the water *** model simulation results validate the formulae for the stratified stability discriminant during spring tides.

关键词： Yangtze Estuary North Passage EFDC model stratification stability salinity distribution

Interwrapping Distinct Metal-Organic Frameworks in DualMOFs for the Creation of Unique Composite Catalysts

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Research 2021年第1期2021卷 1213-1224页

作者： Jia-Long Ling Kai Chen Chuan-de wu State Key Laboratory of Silicon Materials Department of ChemistryZhejiang UniversityHangzhou 310027China

Incorporating metal nanoparticles(MNPs)inside metal-organic frameworks(MOFs)demonstrates superior catalytic properties in numerous reactions;however,the size and distribution of MNPs could not be well controlled,resulting in low product selectivity in catalysis by undergoing different catalytic reaction *** report herein a facile strategy for integrating lattice-mismatched MOFs together to fabricate homogeneously distributed“dual-MOFs,”which are the ideal precursors for the preparation of MNPs@MOFs with unique catalytic *** a proof of concept,we successfully synthesize a dual-MOF HKUST-1/ZIF-8 for in situ creation of redox-active Cu NPs inside hierarchical porous ZIF-8 under controlled pyrolytic *** the advantages of size-tunable Cu NPs in the molecular sieving matrix of ZIF-8,Cu@ZIF-8 demonstrates high activity and selectivity for transformation of alkynes into alkenes without overhydrogenation,which surpasses most of the catalysts in the ***,this work paves a new pathway for developing highly efficient and selective heterogeneous catalysts to produce highly value-added chemicals.

关键词： properties. selectivity proof

Fiberings with Fiber RP(k)

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Acta Mathematica Sinica,English Series 2005年第5期21卷 997-1000页

作者： Zuo LIU Zhen de wu department of Mathematics Hebei Normal University Shijiazhuang 050016 P. R. China

Let κ be non-negative integer. The unoriented bordism classes, which can be represented as [RP（ξ^κ）] where ξ^κ is a k-plane bundle, form an ideal of the unoriented bordism ring MO.. A group of generators of this ideal expressed by a base of MO. and a necessary and sufficient condition for a bordism class to belong to this ideal are given.

关键词： Bordism classes Characteristic number Fibering Partition

Coupling Alfvénic and Ion-Acoustic Solitons

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Chinese Physics Letters 1996年第8期13卷 594-597页

作者： wu de-jin WANG de-yu Carl-Gunne Fälthammar Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008*Department of Plasma PhysicsRoyal Institute of TechnologyStockholmSweden

An exact nonlinear equation governing the coupling Alfvénic and ion-acoustic solitons and criterion for their existence are *** the case of low-β plasmas,the two modes *** the small amplitude limit,the analytical re... 详细信息

关键词： solitons exact criterion

Confidence support vector domain description

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Journal of Systems Engineering and Electronics 2009年第4期20卷 852-857页

作者： Liu Sanyang Liang Jinjin wu de Duan Wei dept. of Mathematical Sciences Xidian Univ. Xi'an 710071 P. R. China School of Computer Science and Technology Xidian Univ. Xi'an 710071 P. R. China

To accelerate the training of support vector domain description （SVDD）, confidence support vector domain description （CSVDD） is proposed based on the observation that the description boundary is determined by a small subset of training data called support vectors. Namely, the number of training samples in the userdefined sphere is calculated and taken as the confidence measure, according to which the training samples are ranked in ascending order. Those former ranked ones are selected as the boundary targets for the SVDD training. Simulations on UCI data demonstrate the effectiveness and superiority of CSVDD： the number of training targets and the training time are reduced without any loss of accuracy.

关键词： support vector domain description confidence support vector domain description user-defined sphere confidence measure boundary targets.

Vortex-Induced Vibrations of A Free-Spanning Pipe Based on A Nonlinear Hysteretic Soil Model at the Shoulders

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China Ocean Engineering 2020年第3期34卷 328-340页

作者： GAO Xi-feng XIE wu-de XU Wan-hai State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China

The pipe-soil interactions at shoulders can significantly affect the vortex-induced vibrations (VIV) of free-spanning pipes in the subsea. In this paper, the seabed soil reacting force on the pipe is directly calculated with a nonlinear hysteretic soil model. For the VIV in the middle span, a classic van der Pol wake oscillator is adopted. Based on the Euler-Bernoulli beam theory, the vibration equations of the pipe are obtained which are different in the middle span and at the two end shoulders. The static configuration of the pipe is firstly calculated and then the VIV is *** present model is validated with the comparisons of VIV experiment, pipe-soil interaction experiment and the simulation results of VIV of free-spanning pipes in which the seabed soil is modelled with spring-dashpots. With the present model, the influence of seabed soil on the VIV of a free-spanning pipe is analyzed. The parametric studies show that when the seabed soil has a larger suction area, the pipe vibrates with smaller bending stresses and is *** with the increase of the shear strength of the seabed soil, the bending stresses increase and the pipe faces more danger.

关键词： free-spanning pipe vortex-induced vibrations nonlinear hysteretic soil model bending stresses

Mesenchymal stem cell-derived exosomes:An emerging therapeutic strategy for normal and chronic wound healing

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World Journal of Clinical Cases 2021年第22期9卷 6218-6233页

作者： Qin-Lu Zeng de-wu Liu Burns Institute The First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina First Clinical Medical College Nanchang UniversityNanchang 330006Jiangxi ProvinceChina

Skin wound healing is a complex biological *** stem cells(MSCs)play an important role in skin wound repair due to their multidirectional differentiation potential,hematopoietic support,promotion of stem cell implantation,self-replication,and immune *** are vesicles with diameters of 40-100 nm that contain nucleic acids,proteins,and lipids and often act as mediators of cell-to-cell ***,many clinical scientists have carried out cell-free therapy for skin wounds,especially chronic wounds,using exosomes derived from *** review focuses on the latest research progress on the mechanisms of action associated with the treatment of wound healing with exosomes derived from different MSCs,the latest research progress on the combination of exosomes and other biological or nonbiological factors for the treatment of chronic skin wounds,and the new prospects and development goals of cell-free therapy.

关键词： Mesenchymal stem cells Exosomes Mesenchymal stem cell-exosomes Wound healing Therapeutics

Matrix transformations of l^q(X) to l^p(Y )

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Applied Mathematics(A Journal of Chinese Universities) 2012年第1期27卷 78-86页

作者： GUO Hao LI Rong-lu wu Jun-de department of Mathematics Harbin Institute of TechnologyHarbin 150001China department of Mathematics Zhejiang UniversityHangzhou 310027China

Let X and Y be Banach spaces, 0 〈 q 〈＋∞, i ≤ p 〈＋∞. In this paper, we characterize matrix transformations of lq （ X ） to lp （ Y ）.

关键词： matrix transformation, sequence space demi-linear mapping.