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A generalized dilatancy angle equation of granular soil

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Journal of Mountain Science 2022年第5期19卷 1456-1463页

作者： yu Fang-wei Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing 100101China China-Pakistan Joint Research Center on Earth Sciences CAS-HECIslamabad 45320Pakistan University of Chinese Academy of Sciences Beijing 100049China Department of Civil Engineering The University of TokyoTokyo 113-8656Japan

This paper presents a generalized dilatancy angle equation of granular soil to cover not only the drained tests but also the undrained tests by introducing a generalized structure of soil:soil skeleton formed by soil particles and the fluid in soil voids,under the assumptions of the incompressibility of soil particles and the compressibility of the fluid in soil *** the drained tests,the generalized dilatancy angle equation of granular soil would be degenerated to its current dilatancy angle ***,for the undrained tests,the generalized dilatancy angle equation of granular soil was derived with aλparameter that was related to the stress-strain state of soil and the nature of the fluid in soil ***λparameter was determined by the initial dilatancy angles of granular soil at the onset of shearing on the same initial state of the soil in the drained and undrained *** addition,the generalized dilatancy angle equation of granular soil was verified for application in calculation of the dilatancy angles of sands in the drained and undrained tests.

关键词： Elastoplastic theory Dilatancy Granular soil Sands Soil Skeleton Triaxial tests

Chaotic Dynamics of Monotone Twist Maps

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Acta Mathematica Sinica,English Series 2022年第1期38卷 179-204页

作者： Guo wei yu Chern Institute of Mathematics and LPMC Nankai UniversityTianjin 300071P.R.China

For a monotone twist map,under certain non-degenerate condition,we showed the existence of infinitely many homoclinic and heteroclinic orbits between two periodic neighboring minimal orbits with the same rotation number,which indicates chaotic *** results also apply to geodesics of smooth Riemannian metrics on the two-dimension torus.

关键词： Monotone twist maps homoclinic and heteroclinic orbits topological entropy

On-demand Direct Design of Polymeric Thermal Actuator by Machine Learning Algorithm

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Chinese Journal of Polymer Science 2020年第8期38卷 908-914,I0009页

作者： Bo-En Liu wei yu Advanced Rheology Institute Department of Polymer Science and EngineeringState Key Laboratory for Metal Matrix Composite MaterialsShanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China

The design optimization of thermal-driven actuators is a challenging task because the performance depends on multiple materials parameters,structural parameters,and working *** this work,we adopted large scale finite element simulation together with machine learning algorithm to fulfill the on-demand design of thermal *** element analysis was used to simulate the performance of thermal actuator with two-layer structure,which generated large amount of dataset by considering the variation of parameters including the moduli,thermal expansion coefficient,sample thickness and length,and *** vector regression(SVR)was adopted to establish the relationship between multiple input parameters and the resulting contact ***,a simple interior point algorithm was used to achieve the on-demand design based on the SVR *** contact pressures of thermal actuator constructed from the optimized parameters deviated less than 15%of the target values.

关键词： Polymer composites Thermal actuator Finite element analysis Support vector regression

Sliding Dynamics of Slide-Ring Polymers Based on the Bead-Spring Model

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Chinese Journal of Polymer Science 2023年第9期41卷 1410-1424,I0007页

作者： Zhong-Qiang Xiong wei yu Advanced Rheology Institute Department of Polymer Science and EngineeringState Key Laboratory for Metal Matrix Composite MaterialsShanghai Jiao Tong UniversityShanghai200240China

Understanding the sliding dynamics is critical for developing rotaxane-based mechanically interlocked *** this work,we studied the sliding behavior of a sliding ring and its influence on the dynamics of attached polymer chains based on the heterogeneous beadspring *** sliding constraint was treated as direction-related confinement with the heterogeneous friction coefficient and constraint *** relaxation spectrum,the diffusion dynamics,and the sliding dynamics under/after drag were studied for typical sliding chain topologies,namely,the sliding dangling chain,the constraint sliding chain,and the sliding *** with the non-sliding chains(such as the free chain,the dangling chain,and the network strand),the slide of one or two chain ends induces an additional slow process in the transition from the Rouse-type behavior to the long-time terminal *** effect of the sliding-related process on the diffusion of specific chain segments relies on the chain *** slow sliding relaxation process is also observed in the sliding process during and after chain deformation,whose characteristic time is at least three times the terminal relaxation time of the free chain with the same length,and will increase with the friction coefficient(i.e.,the interaction)between the ring and the polymer *** results of this work will benefit the understanding of the sliding dynamics in experiments.

关键词： Sliding chain Bead-spring model Heterogeneity Diffusion Mean conformation

Network pharmacology:Changes the treatment mode of"one disease-one target"in cancer treatment

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 268-271页

作者： Shuai Liu Yong-wei yu Department of Cardiology The First People’s Hospital of JiashanJiaxing 314100Zhejiang ProvinceChina Department of Critical Care Medicine The First Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina

The article concluded that network pharmacology provides new ideas and insights into the molecular mechanism of traditional Chinese medicine(TCM)treatment of *** is a new choice and hot spot in the field of cancer *** have also previously published studies on TCM and network *** this letter,we summarize the new paradigm of network pharmacology in cancer treatment mechanisms.

关键词： Network pharmacology Cancer Multicomponent Multitarget Therapy

MULTI-SCALES RELAXATION PROCESSES OF SHORT FIBER OF NEMATIC LIQUID CRYSTALLINE COPOLYMER IN POLYCARBONATE MATRIX

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Chinese Journal of Polymer Science 2008年第1期26卷 99-104页

作者： yu, Ruo-bing yu, wei Zhou, Chi-xing E China Univ Sci & Technol Sch Mat Sci & Engn Shanghai 200237 Peoples R China Shanghai Jiao Tong Univ Dept Polymer Sci & Engn Shanghai 200240 Peoples R China

Multi-scales relaxation processes of short fiber of a nematic liquid crystalline copolymer(LCP)in polycarbonate matrix were ***,the structure relaxation of LCP was studied by *** relaxation spectrum of the nematic liquid crystalline copolymer at 295℃was calculated from the combined dynamic *** are three kinds of relaxation mechanisms for nematic liquid crystalline copotymer:the relaxation of chain orientation,the relaxation of deformed polydomains and the coalescence of pol...

关键词： Liquid crystalline copolymer Multi-scales Relaxation processes

Transient extreme insulin resistance in a critically ill patient:A case report

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World Journal of Clinical Cases 2025年第8期13卷 35-40页

作者： Xiu-yu wei Hsiu-Nien Shen Department of Internal Medicine Taichung Veterans General HospitalTaichung 407TaiwanChina Department of Intensive Care Medicine Chi Mei Medical CenterTainan 710TaiwanChina

BACKGROUND Acute hyperglycemia due to insulin resistance is common in critically ill patients,typically managed with insulin ***,the occurrence of transient extreme insulin resistance(EIR)requiring exceptional high-dose insulin is *** SUMMARY We present the case of a 68-year-old woman with pneumonia who suffered an out-of-hospital cardiac arrest,subsequently developing transient EIR following a new episode of ***,insulin resistance rapidly reversed when the insulin infusion rate peaked at 960 units/hour(a total of 18224 units on that day),and it was promptly titrated down to zero upon achieving the target glucose *** Exceptional high-dose insulin infusion may be required in critically ill patients with stress-related EIR,which is typically *** should be aware of the phenomenon and cautious to avoid hypoglycemia and fluid overload during the steep titration of high-dose insulin infusion.

关键词： Hyperglycemia Insulin Insulin resistance Sepsis Critical illness Case report

Effects of flux on crystal structure and luminescent properties of nitroxides phosphors

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Science China(Physics,Mechanics & Astronomy) 2014年第12期57卷 2228-2234页

作者： XIE An SHI yu WANG yu wei School of Materials Science and Engineering Xiamen University of Technology Fushun Electronics Co. Ltd.

Yellow-green-emitting Sr Si2O2N2:Eu2+phosphors were synthesized with Sr2Si O4:Eu2+as *** effects of flux and the concentration of Eu2+on the crystal structure and luminescent properties of the phosphors were *** suggested that the optimal content of flux Na2CO3 was 1 wt%and the optimal doping concentration of Eu2+was 0.05 *** emission spectra showed the most intense peaks located at 535 nm which corresponded to the 4f65d→4f7 transition of Eu2+.The excitation spectra showed that these phosphors could be effectively excited by near-ultraviolet and blue light,whichwas consistent with the widely applied output wavelengths of near-ultraviolet and blue-white light-emitting diode(LED)*** the influence of flux on the luminescent properties of Sr Si2O2N2:Eu2+phosphor was analyzed,the X-ray diffraction(XRD)patterns indicated that the flux could help the crystallization of the *** other phases except the triclinic structure of Sr Si2O2N2 were *** thermal stability and the emission intensity of synthesized Sr Si2O2N2:Eu2+phosphor were examined and compared with commercial YAG yellow *** results indicate that the yellow-green-emitting phosphor is a suitable candidate for the fabrication of white LEDs.

关键词： flux nitrogen oxides yellow-green-emitting white LEDs

Impaired XPO5 function leads to transportation failure of microRNA precursor

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Science China(Life Sciences) 2017年第6期60卷 677-679页

作者： yu-Quan wei State Key Laboratory of Biotherapy and Cancer Center West China Hospital Sichuan Universityand Collaborative Innovation Center for BiotherapyChengdu 610041China

MicroRNAs（miRNAs）constitute a class of small non-coding RNAs that participate in various biological processes by repressing protein translation or destabilizing target *** biogenesis begins with the transcription of primary miRNAs（pri-miRNAs）in the cell nucleus,which are then cleaved by the Drosha/DGCR complex into precursor miRNAs（pre-miRNAs）.The pre-miRNAs are transported by exportin-5（XPO5）from the nucleus to the cytoplasm,

关键词： miRNAs nucleus microRNA processed mature Dicer constitute cytoplasm impaired transportation