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Applied Mathematics and Mechanics(English Edition) 2015年第11期36卷 1499-1512页

作者： Le LIU Chuanchuan xie bo CHEN Jiankang WU School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wenhua Institute

Dielectrophoresis （DEP） is one of the most popular techniques for bio-particle manipulation in microfluidic systems. Traditional calculation of dielectrophoretic forces of single particle based on the approximation of equivalent dipole moment （EDM） cannot be directly applied on the dense particle interactions in an electrical field. The Maxwell stress tensor （MST） method is strictly accurate in the theory for dielectrophoretic forces of particle interaction, but the cumbersome and complicated numerical computation greatly limits its practical applications. A novel iterative dipole moment （IDM） method is pre- sented in this work for calculating the dielectrophoretic forces of particle-particle inter- actions. The accuracy, convergence, and simplicity of the IDM are confirmed by a series of examples of two-particle interaction in a DC/AC electrical field. The results indicate that the IDM is able to calculate the DEP particle interaction forces in good agreement with the MST method. The IDM is a purely analytical operation and does not require complicated numerical computation for solving the differential equations of an electrical field while the particle is moving.

关键词： dielectrophoresis (DEP) equivalent dipole moment (EDM) particle inter-action Maxwell stress tensor (MST) iterative dipole moment (IDM)

Monogamy and polygamy for the generalized W-class states using unified-(q,s)entropy

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 10-22页

作者： bo Li Bing xie Zhanjun Zhang Heng Fan School of Computer and Computing Science Hangzhou City UniversityHangzhou 310015China Department of Mathematics East China University of TechnologyNanchang 330013China School of Information&Electronic Engineering(Sussex Artificial Intelligence Institute) Zhejiang Gongshang UniversityHangzhou 310018China Institute of Physics Chinese Academy of SciencesBeijing 100190China

We describe the entanglement distribution and restricted shareability of the multipartite generalized W-class states and their reduced density matrix under arbitrary partitions by using monogamy and polygamy relation based on the unified-(q,s)***,we provide an analytical formula of unified-(q,s)entanglement(UE)and an analytical lower bound of unified-(q,s)entanglement of assistance(UEo A)for a reduced density matrix of a generalized W-class ***,we use these two analytical formulas to derive the monogamy and polygamy inequalities for a reduced density matrix of a qudit generalized W-class(GW)*** establish two partition-dependent residual entanglements based on the new monogamy relation,which is helpful to obtain a comprehensive analysis of entanglement dynamics of generalized W-class ***,we investigate tighter monogamy and polygamy relations based on the power ofαth(α≥0)for UE andβth(β≥0)for UEo A,*** results show that the entanglement distribution characteristics of generalized W-class states satisfying stronger constraints can be described more accurately.

关键词： monogamy polygamy multiqudit unified entropy

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Evolutionary under-sampling based bagging ensemble method for imbalanced data classification

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Frontiers of Computer Science 2018年第2期12卷 331-350页

作者： bo SUN Haiyan CHEN Jiandong WANG Hua xie College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China National Key Lab of ATFM Nanjing University of Aeronautics and Astronautics Nanjing 211106 China

In the class imbalanced learning scenario, traditional machine learning algorithms focusing on optimizing the overall accuracy tend to achieve poor classification performance especially for the minority class in which we are most interested. To solve this problem, many effective approaches have been proposed. Among them, the bagging ensemble methods with integration of the under-sampling techniques have demonstrated better performance than some other ones including the bagging ensemble methods integrated with the over-sampling techniques, the cost-sensitive methods, etc. Although these under-sampling techniques promote the diversity among the generated base classifiers with the help of random partition or sampling for the majority class, they do not take any measure to ensure the individual classification performance, consequently affecting the achievability of better ensemble performance. On the other hand, evolutionary under-sampling EUS as a novel under- sampling technique has been successfully applied in searching for the best majority class subset for training a good- performance nearest neighbor classifier. Inspired by EUS, in this paper, we try to introduce it into the under-sampling bagging framework and propose an EUS based bagging ensemble method EUS-Bag by designing a new fitness function considering three factors to make EUS better suited to the framework. With our fitness function, EUS-Bag could generate a set of accurate and diverse base classifiers. To verify the effectiveness of EUS-Bag, we conduct a series of comparison experiments on 22 two-class imbalanced classification problems. Experimental results measured using recall, geometric mean and AUC all demonstrate its superior performance.

关键词： class imbalanced problem under-sampling bagging evolutionary under-sampling ensemble learning machine learning data mining

Wind-induced response analysis of a wind turbine tower including the blade-tower coupling effect

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第11期10卷 1573-1580页

作者： Xiao-bo CHEN Jing LI Jian-yun CHEN School of Civil and Hydraulie Engineering Dalian University of Technology Dalian 116024 China State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China

To analyze wind-induced response characteristics of a wind turbine tower more accurately, the blade-tower coupling effect was investigated. The mean wind velocity of the rotating blades and tower was simulated according to wind shear effects, and the fluctuating wind velocity time series of the wind turbine were simulated by a harmony superposition method. A dynamic finite element method (FEM) was used to calculate the wind-induced response of the blades and tower. Wind-induced responses of the tower were calculated in two cases (one included the blade-tower coupling effect, and the other only added the mass of blades and the hub at the top of the tower), and then the maximal displacements at the top of the tower of the tow cases were compared with each other. As a result of the influence of the blade-tower coupling effect and the total base shear of the blades, the maximal displacement of the first case increased nearly by 300% compared to the second case. To obtain more precise analysis, the blade-tower coupling effect and the total base shear of the blades should be considered simultaneously in the design of wind turbine towers.

关键词： Fluctuating wind velocity Mean wind velocity Tower Blade Coupling Wind shear effect Vibration

Factors associated with heterochronic gastric cancer development post-endoscopic mucosal dissection in early gastric cancer patients

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World Journal of Gastrointestinal Oncology 2023年第9期15卷 1644-1652页

作者： Bing xie yun Xia Xia Wang Yan Xiong Shao-bo Chen Jie Zhang Wei-Wei He Department of Spleen and Stomach Nanjing Pu Kou District Hospital of Traditional Chinese MedicinePukou 210000Jiangsu ProvinceChina Science and Education Section Nanjing Pu Kou District Hospital of Traditional Chinese MedicinePukou 210000Jiangsu ProvinceChina Anesthesiology Department Nanjing Pu Kou District Hospital of Traditional Chinese MedicinePukou 210000Jiangsu ProvinceChina Department of Oncology Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese MedicineNanjing 210022Jiangsu ProvinceChina

BACKGROUND Endoscopic mucosal resection is an innovative method for treating early gastric cancer and has been widely used in clinical *** To analyze the factors associated with the development of heterochronic gastric cancer in patients with early gastric cancer who had undergone endoscopic mucosal dissection(EMD).METHODS A cohort of patients with early gastric cancer treated using EMD was retrospectively analyzed,and patients who developed heterochronic gastric cancer after the surgery were compared with those who did *** effects of patient age,sex,tumor size,pathological type,and surgical technique on the development of heterochronic gastric cancer were assessed using statistical *** Of the 300 patients with early gastric cancer,150 patients developed heterochronic gastric cancer after *** analysis revealed that patient age(P value=XX),sex(P value=XX),tumor size(P value=XX),pathological type(P value=XX),and surgical technique(P value=XX)were significantly associated with the occurrence of heterochronic gastric *** Age,sex,tumor size,pathological type,and surgical technique are key factors influencing the occurrence of heterochronic gastric cancer after EMD in patients with early gastric *** address these factors,postoperative follow-up and management should be strengthened to improve the prognosis and survival rate of patients.

关键词： Early gastric cancer Endoscopic mucosal dissection Heterochronic gastric cancer Associated factors Statistical analysis

Space Environment Simulation for Material Processing by Acoustic Levitation

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Chinese Physics Letters 2001年第1期18卷 68-70页

作者： xie Wen-Jun WEI Bing-bo Department of Applied Physics Northwestern Polytechnical UniversityXi'an 710072

Single-axis acoustic levitation of four polymer samples has been realized in air under the ground-based laboratory conditions for the purpose of space environment simulation of containerless *** levitation capabilities are investigated by numerical calculations based on a model of the boundary element method corresponding to our levitator and following Gor'kov and Barmatz's *** calculated results,such as the resonant distance between the reflector and the vibrating source and the positions of levitated samples,agree well with experimental observation,and the effect of gravity on the time-averaged potential for levitation force is also *** an application,the containerless melting and solidification of a liquid crystal,4-Pentylphenyl-4'-methybenzoate,is successfully accomplished,in which undercooling up to 16 K is obtained and the rotation and oscillation of the sample during solidification may result in fragmentation of the usual radiating surface growth morphology.

关键词： solidification vibrating rotation

Epidemiology and Rb 1 gene of retinoblastoma

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International Journal of Ophthalmology(English edition) 2011年第1期4卷 103-109页

作者： Jun yun, bo-Rong Pan Department of General Surgery Xijing Hospital Fourth Military Medical University Xi'an 710032 Shaanxi Province China Department of Anesthesiology Xijing Hospital Fourth Military Medical University Xi'an 710032 Shaanxi Province China Department of Anatomy and Editorial Office of Chinese Journal of Neuroanatomy Fourth Military Medical University Xi'an 710032 Shaanxi Province China Outpatient Department of Oncology Institute of Tumour Fourth Military Medical University Xi'an 710032 Shaanxi Province China

Retinoblastoma (Rb) is the most common eye cancer in children and it can be inherited. Rb is quite rare and originators from the neural retina with a significant genetic component in etiology, which occurs in approximately 1 in every 20 0000 births. In children with the heritable genetic form of Rb, there is a mutation on chromosome 13, called the retinoblastoma 1 (Rb1) gene. Early diagnosis and intervention is critical to the successful treatment of the Rb. The Rb1 gene is the first cloned tumor suppressor gene. As a negative regulator of the cell cycle, Rb1 gene could maintain a balance between cell growth and development through binding to transcription factors and regulating the expression of genes involved in cell proliferation and differentiation. Thus, it is involved in cell cycle, cell senescence, growth arrest, apoptosis and differentiation. We summarized the recent advances on the epidemiology and Rb1 gene of Rb in this review.

关键词： retinoblastoma epidemiology Rb1 gene structure expression function

Novel Solutions of KdV Equation

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Communications in Theoretical Physics 2004年第3期41卷 397-399页

作者： CHENZhe-yun BIJin-bo CHENDeng-Yuan DepartmentofMathematics ShanghaiUniversityShanghai200436China

Some novel solutions of the KdV equation are obtained through the modified bilinear B?cklund transformation.

关键词： novel solutions Hirota's method Backlund transformation KdV equation

Hydrothermal synthesis of Ce: Lu_(2)SiO_(5) scintillator powders

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Journal of Rare Earths 2009年第5期27卷 801-805页

作者： yun Ping SHI Ying ZHOU Ding xie Jianjun Department of Electronics and Information Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200072China

The synthesis of cerium-doped lutetium oxyorthosilicate(LSO)polycrystalline powders was investigated by a hydrothermal *** precursor was obtained by the hydrothermal reaction of Lu(NO_(3))_(3)with Na_(2)SiO_(3)at 200℃for 10 h by using urea as precipitator,fol-lowed by a calcination uader proper *** results of XRD indicated that the precursor was crystallized into A-type LSO phase at 1000℃,and transfetrred to B-type LSO phase when temperature was raised above 1050℃.After being heated at 1250℃for 2 h,single phase of B-type LSO powder was synthesized with homogeneous distribution of particle size ranging from 200 to 300 *** photolumi-nescence spectrum of as-synthesized LSO:Ce powders showed a typical broad emission peak centered at 404 nm,corresponding to the 5d^(1)-4f transition of Ce^(3+).

关键词： lutetium oxyorthosilicate scintillator hydrothermal luminescence powder rare earths

Synthesis and Structure of a La(Ⅲ) Complex of 1,10-Phenanthroline-2,9-dicarboxylate:a Three-dimensional Network via Hydrogen bonding Interactions

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Chinese Journal of Structural Chemistry 2008年第2期27卷 137-142页

作者： GAO Qian xie Ya-bo CHEN Yuan WANG Dao College of Environmental and Energy Engineering Beijing University of Technology Beijing 100022 China

A new La（Ⅲ） complex, {[La（L）（NO3）（H2O）3]·H2O}n （L = 1,10-phenanthroline- 2,9-dicarboxylate）, has been synthesized and structurally determined by X-ray diffraction analysis. The complex crystallizes in the monoclinic system, space group P21/c with a = 7.7358（17）, b = 8.1664（18）, c = 28.271（6） A, β= 95.184（4）°, V= 1778.6（7） A3, Z = 4, C14H14LaN3O11, Mr = 539.19, Dc = 2.014 g/cm^3, μ= 2.471 mm^-1, F（000） = 1056, the final R = 0.0350 and wR = 0.0659. In this complex, each metal center adopts a ten-coordination geometry formed by two N atoms from a ligand L and eight O atoms from three H2O molecules, a nitrate ion and carboxylates of two ligands. Each ligand adopts a N2,O3-pentdentate coordination mode using two N and two O atoms chelating a La（Ⅲ）, and using another O atom of carboxylate to bridge another La（Ⅲ） center resulting in a 1D helical chain molecule. Intermolecular strong O-H…O and weak C-H…O hydrogen bonds extend the 1D chain structure into a 3D supramolecular architecture.

关键词： hydrogen bonding 1,10-phenanthroline-2,9-dicarboxylate La(Ⅲ) complex,synthesis