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Chinese Journal of Polymer Science 2020年第12期38卷 1392-1402页

作者： Wei-Chen zhou Zu-Chen Du Hao Yang jun-Jie Li Ying Zhang Xue-Qin Gaoi Qiang fu College of Polymer Science and Engineeing Sichuan University Chengdu 610065China

Oriented “shish-kebab” structures could be obtained by shearing to enhance the mechanical properties of polymer samples ***,the effect of shear mode on mechanical properties is still *** study of stepped hoop shear field on the isotactic polypropylene(iPP)pipe was developed through applying a self-designed rotational shear system(RSS).The effect of stepped shear field on the microstructure and comprehensive properties of iPP pipe was investigated by the comparison with continuous *** could be found that the loosely-assembled shish-kebabs with the larger size were formed in the continuous shear pipes,but the smaller and tightly-stacked ones existed in the pipes with stepped ***,due to differential morphologies under different shear modes,better comprehensive mechanical properties were obtained in the pipes with stepped shear.

关键词： PP pipe Shish-kebab Rotational Shear Shear mode

STUDY FOR STREAMLINE OF ARBITRARY SHAPED HOMOGENEOUS RESERVOIRS WITH IMPERMEABLE BARRIERS

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Journal of Hydrodynamics 2006年第3期18卷 329-333页

作者： YIN Hong-jun fu Chun-quan HE Ying-fu Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education Daqing 163318 China Institute of Porous Flow and Fluid Mechanics CNPC and CAS Langfang 065007 China

The steady-state flow mathematical model of arbitrary shaped homogeneous reservoirs with impermeable barrier is constructed in this paper. By using Boundary Element Method （BEM）, the mathematical model is solved. And a streamline generating technique is presented. The figures of streamlines are plotted and analyzed considering the effect of complex boundary and impermeable barriers. Through analyzing it indicates that the size, shape and orientation of impermeable barriers have various degree of influence on the streamlines. So, if there are impermeable barriers in reservoir according to the geological materials, the influence of impermeable barriers must be considered when adjusting flood pattern and injection strategy.

关键词： Boundary Element Method (BEM) streamline,impermeable barrier mathematical model pressure

Dwell-time-based stabilization of switched positive systems with only unstable subsystems

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Science China(Information Sciences) 2021年第1期64卷 266-268页

作者： Ruicheng MA Shuang AN jun fu School of Mathematics Liaoning University State Key Laboratory of Synthetical Automation for Process Industries Northeastern University

Dear editor,Switched positive systems exist in many applications [1,2].Their stability differs from that of standard switched *** main difference is that the state variables are confined to the positive *** results have been derived from previous studies on switched positive systems(see[1,2] and references therein).However,to the best of our knowledge,few studies have focused on the stabilization of switched positive systems with only unstable subsystems by designing a dwell-time switching *** is the motivation of this *** study presents exponential stabilization results for switched positive linear systems by utilizing multiple time-varying Lyapunov functions and dwell-time switching techniques.

关键词： Information Systems and Communication Service

Accuracy of endoscopic ultrasound-guided needle aspiration specimens for molecular diagnosis of non-small-cell lung carcinoma

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World Journal of Clinical Cases 2020年第21期8卷 5139-5148页

作者： Wei Su Xiang-Dong Tian Peng Liu De-jun zhou fu-Liang Cao Department of Endoscopy Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjin’s Clinical Research Center for CancerTianjin 300060China

BACKGROUND Endoscopic ultrasonography-guided fine-needle aspiration(EUS-FNA)and endobronchial ultrasound-guided transbronchial needle aspiration(EBUS-TBNA)are highly sensitive for diagnosing and staging lung *** recent years,targeted therapy has shown great significance in the treatment of non-small cell lung carcinoma(NSCLC).Using these minimally invasive techniques to obtain specimens for molecular testing will provide patients with a more convenient diagnostic *** To evaluate the feasibility and accuracy of tissue samples obtained using EUSFNA and EBUS-TBNA for molecular diagnosis of *** A total of 83 patients with NSCLC underwent molecular testing using tissues obtained from EUS-FNA or EBUS-TBNA at the Tianjin Medical University Cancer Hospital from January 2017 to june *** enrolled patients underwent chest computed tomography or positron emission tomography/computed tomography prior to *** detected abnormal expression of EGFR,KRAS,MET,HER2,ROS1 and anaplastic lymphoma kinase *** patients failed to complete molecular testing due to insufficient tumor *** clinical features,puncture records,molecular testing results and targeted treatment in the remaining 81 patients were *** In a total of 99 tissue samples obtained from 83 patients,molecular testing was successfully completed in 93 samples with a sample adequacy ratio of 93.9%(93/99).Biopsy samples from two patients failed to provide test results due to insufficient tumor *** the remaining 81 patients,62 cases(76.5%)were found to have adenocarcinoma,11 cases(13.6%)had squamous cell carcinoma,3 cases(3.7%)had adenosquamous carcinoma and 5 cases(6.2%)had NSCLC-not otherwise *** results of molecular testing showed EGFR mutations in 21 cases(25.9%),KRAS mutations in 9 cases(11.1%),ROS-1 rearrangement in 1 case(1.2%)and anaplastic lymphoma kinase-positive in 5 cases(6.2%).Twentyfour patients with positive results received targeted ther

关键词： Endobronchial ultrasound-guided transbronchial needle aspiration Endoscopic ultrasonography-guided fine-needle aspiration Non-small cell lung carcinoma Molecular diagnosis Targeted therapy

A New H^2 Regularity Condition of the Solution to Dirichlet Problem of the Poisson Equation and Its Applications

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Acta Mathematica Sinica,English Series 2020年第1期36卷 21-39页

作者： fu Chang GAO Ming jun LAI Department of Mathematics University of IdahoMoscowID 83844 Department of Mathematics University of GeorgiaAthensGA 30602

We study the regularity of the solution of Dirichlet problem of Poisson equations over a bounded domain.A new sufficient condition,uniformly positive reach is *** the assumption that the closure of the underlying domain of interest has a uniformly positive reach,the H^2 regularity of the solution of the Poisson equation is *** particular,this includes all star-shaped domains whose closures are of positive reach,regardless if they are Lipschitz domains or non-Lipschitz *** to the strong solution to the second order elliptic PDE in non-divergence form and the regularity of Helmholtz equations will be presented to demonstrate the usefulness of the new regularity condition.

关键词： Regularity Poisson equations uniformly positive reach non-divergence form

Big challenges: obesity and type 2 diabetes in children and adolescents

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World Journal of Pediatrics 2019年第4期15卷 313-314页

作者： jun-Fen fu Department of Endocrinology Children's HospitalZhejiang University School of Medicine3333 Binsheng RoadHangzhou 310052China

Childhood obesity has emerged as an important public health problem not only in developed countries but in many developing countries [1,2].As we know, the increasing prevalenceof childhood obesity is associated with the grooving increaseof the incidence of adult diseases including type 2 diabetes mellitus, nonalcoholic fatty liver disease and other disease,which dramatically threaten public health.

关键词： Big challenges children adolescents

Restudy of Grüneisen Parameter of Iron in the Pressure Range of 90-160 Gpa

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Chinese Physics Letters 2001年第1期18卷 85-87页

作者： LI Xi-jun zhou Xian-Ming WANG Fan-Hou JING fu-Qian Institute of Electronic Engineering China Academy of Engineering PhysicsP.O.Box 919-501Mianyang 621900 National Laboratory of Shock Wave Physics and Detonation Physics Institute of Fluid PhysicsChina Academy of Engineering PhysicsP.O.Box 919-111Mianyang621900 Graduate School of China Academy of Engineering Physics P.O.Box 2101Beijing 100088 Institute of High Temperature and High Pressure Physics Southwest Jiaotong UniversityChengdu 610031

The Hugoniot equation-of-state(EOS)of porous iron with an average initial density of 6.904g/cm^(3) has been measured in the pressure range from 90 to 160GPa,and a good straight fitting D=2.997+1.603u has accordingly been obtained,where D is the shock wave velocity and u the particle velocity,both in units of km/*** this with the Hugoniot EOS of non-porous iron,the Grüneisen EOS and the Rankine-Hugoniot energy conservation relation,and taking the possible solid-liquid transition correction,we have calculated the Grüneisen parameterγof iron and obtained the resultγ0ρ0=γρ=const,withγ0=1.945 andρ0=7.856g/cm^(3),ρbeing the density.

关键词： density. straight correction

Causes of the Intraseasonal SST Variability in the Tropical Indian Ocean

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Atmospheric and Oceanic Science Letters 2008年第1期1卷 18-23页

作者： Tim Li Francis Tam Xiouhua fu zhou Tian-jun ZHU Wei-jun IPRC and Department of Meteorology University of Hawaii at Manoa Honolulu Hawaii USA Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Joint Climate Institute of CMA ＆ NUIST Nanjing University of Information Science ＆ Technology Nanjing 210044 China

Satellite observations reveal a much stronger intraseasonal sea surface temperature （SST） variability in the southern Indian Ocean along 5-10°S in boreal winter than in boreal summer. The cause of this seasonal dependence is studied using a 2 1/2-layer ocean model forced by ERA-40 reanalysis products during 1987-2001. The simulated winter-summer asymmetry of the SST variability is consistent with the observed. A mixed-layer heat budget is analyzed. Mean surface westerlies along the ITCZ （5-10°S） in December-January-February （DJF） leads to an increased （decreased） evaporation in the westerly （easterly） phase of the intraseasonal oscillation （ISO）, during which convection is also enhanced （suppressed）. Thus the anomalous shortwave radiation, latent heat flux and entrainment effects are all in phase and produce strong SST signals. During june-July-August （JJA）, mean easterlies prevail south of the equator. Anomalies of the shortwave radiation tend to be out of phase to those of the latent heat flux and ocean entrainment. This mutual cancellation leads to a weak SST response in boreal summer. The resultant SST tendency is further diminished by a deeper mixed layer in JJA compared to that in DJF. The strong intraseasonal SST response in boreal winter may exert a delayed feedback to the subsequent opposite phase of ISO, implying a two-way air-sea interaction scenario on the intraseasonal timescale.

关键词： SST ISO shortwave radiation latent heatflux ocean entrainment

Coupled models of heat transfer and phase transformation for the run-out table in hot rolling

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第7期9卷 932-939页

作者： Shui-xuan CHEN jun ZOU Xin fu State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

Mathematical models are been proposed to simulate the thermal and metallurgical behaviors of the strip occtLrring on the run-out table （ROT） in a hot strip mill. A variational method is utilized for the discretization of the governing transient conduction-convection equation, with heat transfer coefficients adaptively determined by the actual mill data. To consider the thermal effect of phase transformation during cooling, a constitutive equation for describing austenite decomposition kinetics of steel in air and water cooling zones is coupled with the heat transfer model. As the basic required inputs in the numerical simulations, thermal material properties are experimentally measured for three carbon steels and the least squares method is used to statistically derive regression models for the properties, including specific heat and thermal conductivity. The numerical simulation and experimental results show that the setup accuracy of the temperature prediction system of ROT is effectively improved.

关键词： Run-out table (ROT) Cooling process Heat transfer Phase change Material properties

Numerical investigation of filling transients in small-scale pipelines with submerged outlet

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Journal of Hydrodynamics 2019年第1期31卷 145-151页

作者： Ling Wang fu-jun Wang Jing Huang College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083China Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System China Agricultural UniversityBeijing 100083China Zhuzhou Southern Valve Co. Ltd Zhuzhou 412007China

An elastic model that combines the dead-end and the orifice at the downstream end is proposed in order to study the hydraulic transients during the rapid filling in small-scale pipelines with submerged *** this model,the unsteady water flow is solved by the method of characteristics,the water-air interface is traced by a shock fitting method,and the air phase is controlled by the polytropic *** model is validated by a filling test in a pipeline with *** the proposed model is applied to the filling transient analysis in a small-scale pipeline with submerged ***,the effects of the submerged depth of the downstream reservoir on the filling transients are *** model provides a reasonable approximation of the submerged outlet boundary condition in small-scale pipelines.

关键词： Small-scale pipelines rapid filling submerged outlet elastic model hydraulic transients