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Effects of fluid recirculation on mass transfer from the arterial surface to flowing blood

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Acta Mechanica Sinica 2012年第3期28卷 904-910页

作者： Zhi-Guo Zhang xi-wen Zhang Ying-xi Liu Department of Engineering Mechanics Faculty of Vehicle Engineering and MechanicsState Key Laboratory of Structural Analysisfor Industrial EquipmentDalian University of Technology116024 DalianChina School of Aerospace Tsinghua University100084 BeijingChina

The effect of disturbed flow on the mass trans- fer from arterial surface to flowing blood was studied nu- merically, and the results were compared with that of our previous work. The arterial wall was assumed to be vis- coelastic and the blood was assumed to be incompressible and non-Newtonian fluid, which is more close to human arte- rial system. Numerical results indicated that the mass trans- fer from the arterial surface to flowing blood in regions of disturbed flow is positively related with the wall shear rates and it is significantly enhanced in regions of disturbed flow with a local minimum around the reattachment point which is higher than the average value of the downstream. There- fore, it may be implied that the accumulation of cholesterol or lipids within atheromatous plaques is not caused by the reduced efflux of cholesterol or lipids, but by the infiltration of the LDL （low-density lipoprotein） from the flowing blood to the arterial wall.

关键词： Disturbed flow Arterial wall Mass transfer Atherosclerosis Wall shear rates

SYMMETRICAL SISF IN DEFORMED Ni_3Al AND ITS FORMATION MECHANISM

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Acta Metallurgica Sinica(English Letters) 1992年第2期5卷 76-81页

作者： YAN wen xi′an Institute of Technology,xi′an,China xi'an Inst of Technology Xi'an China

The symmetrical superlattice intrinsic stacking faults(SISFs)formed on {111} planes are the predominant crystal defects in polycrystalline Ni_3AI after slight deformation at room temper- *** formation of this kind of SISF is resulted from the dipoles which are distributed on the neighboring {111} planes after reorientation,dissociation and annihilation under applied stress.

关键词： deformed Ni_3Al symmetrical stacking fault formation mechanism

Micro-management of pluripotent stem cells

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Protein & Cell 2014年第1期5卷 36-47页

作者： wen-Ting Guo xi-wen Wang YangmingWang Peking-Tsinghua Center for Life Sciences Institute of Molecular Medicine Peking University Beijing 100871 China

Embryonic and induced pluripotent stem cells （ESCs and iPSCs） hold great promise for regenerative medi- cine. The therapeutic application of these cells requires an understanding of the molecular networks that regu- late pluripotency, differentiation, and de-differentiation. Along with signaling pathways, transcription factors, and epigenetic regulators, microRNAs （miRNAs） are emerging as important regulators in the establishment and maintenance of pluripotency. These tiny RNAs control proliferation, survival, the cell cycle, and the pluripotency program of ESCs. In addition, they serve as barriers or factors to overcome barriers during the reprogramming process. Systematic screening for novel miRNAs that regulate the establishment and mainte- nance of pluripotent stem cells and further mechanistic investigations will not only shed new light on the biology of ESCs and iPSCs, but also help develop safe and efficient technologies to manipulate cell fate for regen- erative medicine.

关键词： stem cells miRNA pluripotency,reprogramming

Exact Entanglement Dynamics in Three Interacting Qubits

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Chinese Physics Letters 2018年第11期35卷 11-15页

作者： wen-Bin He xi-wen Guan State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 University of Chinese Academy of Sciences Beijing 100049 Center for Cold Atom Physics Chinese Academy of Sciences Wuhan 430071 Department of Theoretical Physics Research School of Physics and Engineering Australian National University Canberra ACT 0200 Australia

Motivated by recent experimental studies on coherent dynamics transfer in three interacting atoms or electron spins [Phys. Rev. Lett 114（2015） 113002, Phys. Rev. Lett 120（2018） 243604], here we study entanglement entropy transfer in three interacting qubits. We analytically calculate time evolutions of wave function, density matrix and entanglement of the system. We find that initially entangled two qubits may alternatively transfer their entanglement entropy to other two qubit pairs. Thus dynamical evolution of three interacting qubits may produce a genuine three-partite entangled state through entanglement entropy transfers. In particular, different pairwise interactions of the three qubits endow symmetric and asymmetric evolutions of the entanglement transfer,characterized by the quantum mutual information and concurrence. Finally, we discuss an experimental proposal of three Rydberg atoms for testing the entanglement dynamics transfer of this kind.

关键词： Exact Entanglement Dynamics in Three Interacting Qubits

Parallel-batch scheduling with deterioration and rejection on a single machine

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Applied Mathematics(A Journal of Chinese Universities) 2020年第2期35卷 141-156页

作者： LI Da-wei LU xi-wen School of Science East China University of Science and TechnologyShanghai 200237China.

The single machine parallel-batch scheduling with deteriorating jobs and rejection is considered in this paper.A job is either rejected,in which a rejection penalty should be paid,or accepted and processed on the *** job’s processing time is an increasing linear function of its starting *** machine can process any number of jobs simultaneously as a *** processing time of a batch is equal to the largest processing time of the jobs in the *** objectives are to minimize the makespan and the total weighted completion time,respectively,under the condition that the total rejection penalty cannot exceed a given upper bound *** show that both problems are NP-complete and present dynamic programming algorithms and fully polynomial time approximation schemes(FPTASs)for the considered problems.

关键词： parallel-batch scheduling rejection deterioration FPTAS NP-complete

Momentum distribution and non-local high order correlation functions of 1D strongly interacting Bose gas

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Chinese Physics B 2018年第7期27卷 138-151页

作者： EJKP Nandani xi-wen Guan Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 China University of Chinese Academy of Sciences Beijing 100049 China Department of Mathematics University of Ruhuna Matara 81000 Sri Lanka Department of Theoretical Physics Research School of Physics and Engineering Australian National University Canberra ACT 0200 Australia

The Lieb-Liniger model is a prototypical integrable model and has been turned into the benchmark physics in theoretical and numerical investigations of low-dimensional quantum systems. In this note, we present various methods for calculating local and nonlocal M-particle correlation functions, momentum distribution, and static structure factor. In particular, using the Bethe ansatz wave function of the strong coupling Lieb-Liniger model, we analytically calculate the two-point correlation function, the large moment tail of the momentum distribution, and the static structure factor of the model in terms of the fractional statistical parameter a = 1 - 2/γ, where γ, is the dimensionless interaction strength. We also discuss the Tan＇s adiabatic relation and other universal relations for the strongly repulsive Lieb-Liniger model in terms of the fractional statistical parameter.

关键词： correlation function momentum distributions structure factor contact

Online Scheduling on a Parallel Batch Machine with Delivery Times and Limited Restarts

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Journal of the Operations Research Society of China 2022年第1期10卷 113-131页

作者： Hai-Ling Liu xi-wen Lu Department of Mathematics East China University of Science and TechnologyShanghai 200237China College of Science Henan University of EngineeringZhengzhou 451191HenanChina

The online scheduling on an unbounded parallel batch machine with delivery times and limited restarts is studied in this ***,online means that jobs arrive over time and the characteristics of a job become known until it *** restarts mean that once a running batch contains at least one restarted job,it cannot be restarted *** goal is to minimize the time by which all jobs have been *** consider a restricted model that the delivery time of each job is no more than its processing *** present a best possible online algorithm with a competitive ratio of 3/2 for the problem.

关键词： Online scheduling Parallel batch Limited restart Delivery time

Modulation of Amyloid-β Conformation by Charge State of N-Terminal Disordered Region

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Chinese Physics Letters 2012年第8期29卷 288-291页

作者： xi wen-Hui LI wen-Fei WANG Wei National Laboratory of Solid State Microstructure and Department of PhysicsNanjing UniversityNanjing 210093

Based on molecular dynamics simulations,we show that variations of the charge states of the histidines,which are the main effects of pH-value change and metal binding,can lead to a drastic change of the intra-peptide interactions of the segment 17–42 and the conformational distribution of the monomeric amyloid-β(Aβ).Since we already knew that the conformational distribution of monomeric Aβcan largely affect Aβfibrillar aggregation,our results suggest that the pH value change and metal binding can affect the Aβaggregation by much more complex mechanism than just affecting the inter-peptide *** fully understand the mechanism of metal binding and pH-value induced Aβaggregation,we also need to consider their effects on the conformational distribution of monomeric Aβ.

关键词： aggregation conformational value

Scheduling Reclaimer Operations in the Stockyard to Minimize Makespan

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Acta Mathematicae Applicatae Sinica 2018年第3期34卷 597-609页

作者： Chao WANG xi-wen LU René SITTERS East China University of Science and Technology 200237 Shanghai China VU University Amsterdam De Boelelaan 1105 1081 HV Amsterdam The Netherlands

This paper considers a reclaimer scheduling problem in which one has to collect bulk material from stockpiles in the quay in such a way that the time used is minimized. When reclaimers are allowed to work on the same stockpile simultaneously, a fully polynomial time approximation scheme（FPTAS） is designed. Further,we present a 2-approximation algorithm in the case that any stockpile can be handled by only one reclaimer at a time. When the number of reclaimers is two, we give a 3/2-approximation algorithm. Numerical experiments show that the algorithms perform much better than our worst case analysis guarantees.

关键词： scheduling approximation algorithm performance ratio numerical simulation