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Dimension Results for Space-anisotropic Gaussian Random Fields

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Acta Mathematica Sinica,English Series 2019年第3期35卷 391-406页

作者： wen Qing ni Zhen Long CHEN Wei Gang WANG School of Statistics and Mathematics Zhejiang Gongshang University School of Science Jimei University

Let X = {X(t) ∈ R^d, t ∈ R^N} be a centered space-anisotropic Gaussian random field whose components satisfy some mild conditions. By introducing a new anisotropic metric in R^d, we obtain the Hausdorff and packing dimension in the new metric for the image of X. Moreover, the Hausdorff dimension in the new metric for the image of X has a uniform version.

关键词： Hausdorff dimension packing dimension gaussian random field uniform dimension

Answer for questions of repeated measurements of variance analysis and distribution test of data—Authors’reply

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Frontiers of Medicine 2022年第4期16卷 661-665页

作者： Dao wen Wang Li ni Hualiang Jiang Division of Cardiology Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological DisordersTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Shanghai Institute for Advanced Immunochemical Studies and School of Life Science and Technology ShanghaiTech UniversityShanghai 201210China

Thank the journal for sending us the Correspondence of *** Wei for our article“Effects of Shuanghuanglian oral liquids on patients with COVID-19:a randomized,open-label,parallel-controlled,multicenter clinical trial”published in Frontiers of Medicine[1].We appreciate *** Wei for agreeing with most of the conclusions in our paper and we address *** Wei’s comments carefully as below.

关键词： journal comment carefully

Formation Sites and Microscopic Conformation Study on the Konjac Glucomannan Molecular Helices

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Chinese Journal of Structural Chemistry 2010年第7期29卷 1084-1090页

作者： JIAN wen-jie WANG Meng YAO Min-Na PANG jie Department of Biological Technology Xiamen Ocean Vocational College Xiamen 361012 China College of Food Science Fujian Agriculture and Forestry University Fuzhou 350002 China

In this work, the formation sites, helical parameters and hydrogen bond positions of Konjac glucomannan molecular helices were investigated using molecular dynamic simulation method. To our interest, the KGM chain is mainly composed by local left and right helix struetttres. The formation sites of KGM chain might locate at the chain-segments containing acetyl groups, and the left helix is the favorable conformation of KGM. Temperature-dependent molecule conformation study indicates that the right helix is dominant when the temperature is lower than 343 K, above which, however, the left helix is dominating （right helix disappears）. In addition, intramolecular hydrogen bonds in the left helix can be found at the -OH groups on C（2）, C（4） and C（6） of mannose residues; comparably, the intramolecular hydrogen bonds in the right helix can be mainly observed at the -OH groups on C（4） and C（6） of the mannose residues and C（3） of the glucose residues. In conclusion, molecular dynamic simulation is an efficient method for the microscopic conformation study of glucomannan molecular helices.

关键词： Konjac glucomannan helical structure formation sites helical parameters,hydrogen bond sites

Hydration mechanism of a cementitious material prepared with Si-Mn slag

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International Journal of Minerals,Metallurgy and Materials 2011年第2期18卷 234-239页

作者： Xu-fang Zhang wen ni Jun-yu Wu Li-ping Zhu Key Laboratory of the Minstry of Education of China for High-Efficient Mining and Safety of Metal Mines Ministry of Education University of Science and Technology Beijing Beijing 100083 China North China University of Water Resources and Electric Power Zhengzhou 450011 China Beijing Dongfangjianyu Institute of Concrete Science and Technology Beijing 100190 China

A cementitious material was prepared by mixing 80wt% Si-Mn slag powder, 10wt% lime, and 10wt% anhydrite. The compressive strength of mortar samples reaches 51.48 MPa after 28 d curing. The analyses of X-ray diffraction （XRD） and scanning electron microscopy （SEM） show that much ettringite is formed in the sample cured for 3 d, and C-S-H gel increases rapidly during subsequent curing. Nuclear magnetic resonance （NMR） analysis of 29Si and 27Al and infrared spectroscopy （IR） analysis show that aluminum decomposition from tetrahedral network of the slag glass and its subsequent migration and re-combination play an important role in the process of hydration and strength development of the samples.

关键词： slag cement mechanical properties nuclear magnetic resonance (NMR) hydration

Prediction models of burst strength degradation for casing with considerations of both wear and corrosion

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Petroleum Science 2024年第1期21卷 458-474页

作者： jie-Li Wang wen-Jun Huang De-Li Gao MOE Key Laboratory of Petroleum Engineering China University of PetroleumBeijing102249China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China

Casing wear and casing corrosion are serious problems affecting casing integrity failure in deep and ultra-deep *** paper aims to predict the casing burst strength with considerations of both wear and ***,the crescent wear shape is simplified into three categories according to common mathematical ***,based on the mechano-electrochemical(M-E)interaction,the prediction model of corrosion depth is built with worn depth as the initial condition,and the prediction models of burst strength of the worn casing and corroded casing are ***,the accuracy of different prediction models is validated by numerical simulation,and the main influence factors on casing strength are *** last,the theoretical models are applied to an ultra-deep well in Northwest China,and the dangerous well sections caused by wear and corrosion are predicted,and the corrosion rate threshold to ensure the safety of casing is *** results show that the existence of wear defects results in a stress concentration and enhanced M-E interaction on corrosion depth *** accuracy of different mathematical models is different:the slot ring model is most accurate for predicting corrosion depth,and the eccentric model is most accurate for predicting the burst strength of corroded *** burst strength of the casing will be overestimated by more than one-third if the M-E interaction is neglected,so the coupling effect of wear and corrosion should be sufficiently considered in casing integrity evaluation.

关键词： Deep well Casing integrity Casing wear Casing corrosion Burst strength

Bayesian inference of the crust–core transition density via the neutron-star radius and neutron-skin thickness data

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Nuclear Science and Techniques 2023年第6期34卷 125-133页

作者： wen-jie Xie Zi-Wei Ma Jun-Hua Guo Department of Physics Yuncheng UniversityYuncheng044000China

In this work,we perform a Bayesian inference of the crust-core transition density ρ_(t) of neutron stars based on the neutron-star radius and neutron-skin thickness data using a thermodynamical *** and Gaussian distributions for the ρ_(t) prior were adopted in the Bayesian *** has a larger probability of having values higher than 0.1 fm^(−3) for ρ_(t) as the uniform prior and neutron-star radius data were *** was found to be controlled by the curvature K_(sym) of the nuclear symmetry *** phenomenon did not occur if K_(sym) was not extremely negative,namely,K_(sym)>−200 *** value ofρ_(t) obtained was 0.075_(−0.01)^(+0.005) fm^(−3) at a confidence level of 68%when both the neutron-star radius and neutron-skin thickness data were *** anti-correlations were observed between ρ_(t),slope L,and curvature of the nuclear symmetry *** dependence of the three L-K_(sym) correlations predicted in the literature on crust-core density and pressure was quantitatively *** most probable value of 0.08 fm^(−3) for ρ_(t) was obtained from the L-K_(sym) relationship proposed by Holt et *** larger values were preferred for the other two relationships.

关键词： Crust–core transition density of neutron stars Neutron-star radius Neutron-skin thickness Bayesian inference approach L–K_(sym)

Flux-pinning-induced stress behaviors in a long superconducting slab with central cuboid hole

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Acta Mechanica Sinica 2021年第8期37卷 1255-1263,I0001页

作者： Qi-Fang Liu wen-jie Feng Jia-Yu Liu School of Civil Engineering Shandong UniversityJinan 250061China State Key Lab Mech Behav&Syst Safety Traff Engn Shijiazhuang Tiedao UniversityShijiazhuang 050043China Hebei Key Lab Smart Mat&Struct Mech Shijiazhuang Tiedao UniversityShijiazhuang 050043China

This paper investigates the flux-pinning-induced stress behaviors in a long superconducting slab with a central cuboid *** distribution of flux density is analytically derived for the critical current density of Kim model by considering the effects of the *** concentration of stress for both of the zero-field cooling(ZFC)and the field cooling(FC)magnetization processes are investigated through numerical simulation by using finite element *** results indicate the potential failure mode varies with the height-width ratio and the dimensions of the *** to the case of infinite hole height,the stress concentration behavior for the FC process is more critical when the dimensions of the hole are *** findings in this paper are useful for understanding of the degrade mechanism of superconductor in service and the design of new system.

关键词： Electromagnetic force Cuboid hole Stress concentration factor Superconducting slab

Mechanism of Janus Polymerization: A DFT StudyFig. S3 Energy profiles of anionic polymerization in Stage I under B3LYP/6-31G(d,p)(blue) and B3LYP/aug-cc-p VTZ//B3LYP/6-31G(d,p)(red). Scheme S1. Propagation process of CL/THF on cationic side in Stage I of J

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Chinese Journal of Polymer Science 2019年第10期37卷 990-994,I0004页

作者： Tian-wen Bai Xu-Feng ni Jun Ling Zhi-Quan Shen Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University

Janus polymerization is featured as a combination of cationic and anionic growing ends in one living polymer chain. In the copolymerization of THF and CL catalyzed by lutetium triflates and initiated by propylene oxide, three stages are identified by kinetic study including(1) fast cationic polymerization with slow anionic one,(2) fast anionic polymerization with dormant cationic one, and(3)reactivation of cationic polymerization with coupling of anionic and cationic chain ends. In this work, density functional theory(DFT)calculation is employed to investigate the reaction details of ionic polymerization and dormancy. A “tripedal crow” configuration is proposed to illustrate the unique high-coordinated ligand exchange configuration in anionic polymerization in different stages. The trigger of dormancy is determined as chain structures rather than concentration of triflate anion according to both calculation and experimental results.

关键词： Rare earth metal catalysts Ring-opening polymerization Ionic polymerization Reaction mechanism Quantum chemicalcomputation

Obesity and cancer stem cells:Roles in cancer initiation,progression and therapy resistance

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World Journal of Stem Cells 2023年第4期15卷 120-135页

作者： wen-jie Xie Jian Li Department of General Surgery The Third Hospital of MianyangSichuan Mental Health CenterMianyang 621000Sichuan ProvinceChina

Obesity,the global pandemic since industrialization,is the number one lifestylerelated risk factor for premature death,which increases the incidence and mortality of various diseases and conditions,including *** recent years,the theory of cancer stem cells(CSCs),which have the capacity for self-renewal,metastasis and treatment resistance,has been bolstered by increasing ***,research on how obesity affects CSCs to facilitate cancer initiation,progression and therapy resistance is still in its infancy,although evidence has already begun to *** the ever-increasing burden of obesity and obesity-related cancer,it is pertinent to summarize evidence about the effects of obesity on CSCs,as elucidating these effects will contribute to the improvement in the management of obesity-related *** this review,we discuss the association between obesity and CSCs,with a particular focus on how obesity promotes cancer initiation,progression and therapy resistance through CSCs and the mechanisms underlying these *** addition,the prospect of preventing cancer and targeting the mechanisms linking obesity and CSCs to reduce cancer risk or to improve the survival of patients with cancer is considered.

关键词： Obesity High-fat diet Cancer stem cells Carcinogenesis Metastasis