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Mapping Seismic Hazard for Canadian Sites Using Spatially Smoothed Seismicity Model

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International Journal of Disaster Risk Science 2023年第6期14卷 898-918页

作者： Chao feng Han-ping Hong School of Civil Engineering Chang’an UniversityXi’an 710061China School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen 518055China Department of Civil and Environmental Engineering University of Western OntarioLondon N6A 5B9Canada

The estimated seismic hazard based on the delineated seismic source model is used as the basis to assign the seismic design loads in Canadian structural design *** alternative for the estimation is based on a spatially smoothed source ***,a quantification of differences in the Canadian seismic hazard maps(CanSHMs)obtained based on the delineated seismic source model and spatially smoothed model is *** quantification is valuable to identify epistemic uncertainty in the estimated seismic hazard and the degree of uncertainty in the *** the present study,we developed seismic source models using spatial smoothing and historical earthquake *** quantified the differences in the estimated Canadian seismic hazard by considering the delineated source model and spatially smoothed source *** the development of the spatially smoothed seismic source models,we considered spatial kernel smoothing techniques with or without adaptive *** results indicate that the use of the delineated seismic source model could lead to under or over-estimation of the seismic hazard as compared to those estimated based on spatially smoothed seismic source *** suggests that an epistemic uncertainty caused by the seismic source models should be considered to map the seismic hazard.

关键词： Adaptive kernel smoothing Fixed kernel smoothing Ground motion model Probabilistic seismic hazard analysis Seismic hazard map Uniform hazard spectra

Orbitally driven giant thermal conductance associated with abnormal strain dependence in hydrogenated graphene-like borophene

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npj Computational Materials 2019年第1期5卷 752-759页

作者： Jia He Dengfeng Li Yan Ying Chunbao feng Junjie He Chengyong Zhong Hangbo zhou ping zhou Gang Zhang School of Science Chongqing University of Posts and TelecommunicationsChongqing 400065China Institute of High Performance Computing A*STARSingapore 138632Singapore

Heat energy in solids is carried by phonons and ***,in most two-dimensional(2D)materials,the contribution from electrons to total thermal conduction is much lower than that for *** this work,through first-principles calculations combined with non-equilibrium Green’s function theory,we studied electron and phonon thermal conductance in recently synthesized 2D hydrogen *** hexagonal boron network with bridging hydrogen atoms is suggested to exhibit comparable lattice thermal conductance(4.07 nWK−1 nm−2)as graphene(4.1 nWK−1 nm−2),and similar electron thermal conductance(3.6 nWK−1 nm−2),which is almost ten times that of *** a result,total thermal conductance of 2D hydrogen boride is about two-fold of graphene,being the highest value in all known 2D ***,tensile strain along the armchair direction leads to an increase in carrier density,significantly increasing electron thermal *** increase in electron thermal conductance offsets the reduction in phonon thermal conductance,contributing to an abnormal increase in thermal *** demonstrate that the high electron density governs extraordinarily high thermal conductance in 2D hydrogen boride,distinctive among 2D materials.

关键词： strain thermal Orbital

Dependence of Performance of Organic Light-emitting Devices on Sheet Resistance of Indium-tin-oxide Anodes

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Chemical Research in Chinese Universities 2006年第4期22卷 427-431页

作者： zhou Liang ZHANG Hong-jie YU Jiang-bo MENG Qing-guo PENG Chun-yun LIU feng-yi DENG Rui-ping PENG Ze-ping LI Zhe-feng Key Laboratory of Rare Earth Chemistry and Physics Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China

The dependence of the performance of organic light-emitting devices（OLEDs） on the sheet resistance of indiumtin-oxide（ITO） anodes was investigated by measuring the steady state current density brightness voltage characteristics and the electroluminescent spectra. The device with a higher sheet resistance anode shows a lower current density, a lower brightness level, and a higher operation voltage. The electroluminescence（EL） efficiencies of the devices with the same structure but different ITO anodes show more complicated differences. Furthermore, the shift of the light-emitting zone toward the anode was found when an anode with a higher sheet resistance was used. These performance differences are discussed and attributed to the reduction of hole injection and the increase in voltage drop over ITO anode with the increase in sheet resistance.

关键词： Organic light-emitting device(OLED) Indium-tin-oxide(ITO) Sheet resistance Balance of holes and electrons

Effect of nitrogen addition on microstructure and erosion-corrosion behavior of stainless steel in acidic slurry

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China Foundry 2009年第3期6卷 197-201页

作者： Li ping Cai Qi zhou Wei Bo kang Li feng jun School of Material Science and Engineering Henan Polytechnic UniversityJiaozuo 454000HenanChina China Yituo Group Co. Ltd.Luoyang 471004HenanChina School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China China Yituo Group Co.Ltd.Luoyang 471004HenanChina

Effect of nitrogen content on the microstructure and erosion-corrosion (E-C) behavior of stainless steel (containing about 25% Cr, 5%-6% Ni, and 1%-2% Mo) was investigated by using optical microscope(OM), potentiodynamic polarization curve and immersion method, a self-made rotating disk apparatus and scanning electron microscopy (SEM) and so on. The results show that with the increase of nitrogen content from 0 (no adding) to 0.485 wt.%, the Cr(eq)/Ni(eq) ratio of the tested materials decreases from 4.14 to 1.23 and the ferrite volume percentage of the steel tested linearly decreases approximately from 90% to 10%. The effect of nitrogen content on polarization behavior of the studied steel was not significant. All the passive current densities (I(p)) and pure corrosion rates (V(c)) of the different N content specimens in the acidic solution (slurry containing 0.1 M H(2)SO(4)+0.06% Cl(-)+0.4% F(-), the simplified zinc hydrometallurgy slurry) are too low and nearly negligible. Whereas the pure erosion rates (V(e)) of the four scenarios of the steels tested (N content, wt.%: N1, no adding; N2, 0.143%; N3, 0.289%; N4, 0485%, respectively) are much higher than their V(c) values. The V(e) values of the tested steels are in the order of N4 > N1 > N3 > N2, at the same time, the total weight loss rates (V(t)) follow the order of N4 > N1 > N3 > N2, too. N2 steel consisting of approximately equal volume fractions of ferrite (alpha) and austenite (gamma) exhibits the most excellent E-C resistance and erosion resistance, while the stainless steels possessing the big difference between alpha phase and gamma phase, such as N1 steel nearly possessing single ferrite or N4 steel nearly possessing single austenite, show poorer E-C resistance and erosion resistance.

关键词： nitrogen microstructure erosion-corrosion (E-C) duplex stainless steels

Vitamin D,selenium,and antidiabetic drugs in the treatment of type 2 diabetes mellitus with Hashimoto's thyroiditis

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World Journal of Diabetes 2024年第2期15卷 209-219页

作者： Fen feng Bin zhou Ci-La zhou ping Huang Gang Wang Kuang Yao School of Pharmacy Shaoyang UniversityShaoyang 422099Hunan ProvinceChina Department of Endocrinology The Central Hospital of ShaoyangShaoyang 422099Hunan ProvinceChina

BACKGROUND Diabetes and thyroiditis are closely *** occur in combination and cause significant damage to the *** is no clear treatment for type-2 diabetes mellitus(T2DM)with Hashimoto's thyroiditis(HT).While single symptomatic drug treatment of the two diseases is less effective,combined drug treatment may improve *** To investigate the effect of a combination of vitamin D,selenium,and hypoglycemic agents in T2DM with *** This retrospective study included 150 patients with T2DM and HT treated at The Central Hospital of Shaoyang from March 2020 to February *** patients were assigned to the control group,test group A,and test group B according to different treatment *** control group received low-iodine diet guidance and hypoglycemic drug *** group A received the control treatment plus vitamin D *** group B received the group A treatment plus *** levels of markers of thyroid function[free T3(FT3),thyroid stimulating hormone(TSH),free T4(FT4)],autoantibodies[thyroid peroxidase antibody(TPOAB)and thyroid globulin antibody(TGAB)],blood lipid index[low-density lipoprotein cholesterol(LDL-C),total cholesterol(TC),triacylglycerol(TG)],blood glucose index[fasting blood glucose(FBG),and hemoglobin A1c(HbA1c)]were measured pre-treatment and 3 and 6 months after *** relationships between serum 25-hydroxyvitamin D3[25(OH)D3]level and each of these indices were *** The levels of 25(OH)D3,FT3,FT4,and LDL-C increased in the order of the control group,test group A,and test group B(all P

关键词： Type-2 diabetes mellitus Hashimoto's thyroiditis Vitamin D Selenium agent Hypoglycemic drugs Curative effect

Solidification pathways and hot tearing susceptibility of MgZn_xY_4Zr_(0.5) alloys

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China Foundry 2018年第2期15卷 124-131页

作者： Zhi Wang Sheng Yao Yu feng Zheng Liu Yi-zhou Li feng Wang ping-li Mao School of Materials Science and Engineering Shenyang University of Technology

Hot tearing is known as one of the most serious solidification defects commonly encountered during solidification. It is very important to study the solidification path of alloys. In the work, thermal analysis with cooling curve was used for the investigation of microstructure evolution with different Zn contents during solidification process of MgZn_xY_4Zr_(0.5) alloys. Thermal analysis results of MgY_4Zr_(0.5) alloys revealed one distinct phase precipitation: α-Mg. Three different phase peaks were detected in the Zn-containing alloys: α-Mg, Z-phase(Mg_(12)YZn) and W-phase(Mg_3 Y_2Zn_3). In addition, for the present MgZn_xY_4Zr_(0.5) alloys, the freezing ranges of these alloys from large to small were: MgZn_(1.5)Y_4Zr_(0.5)>MgZn)(3.0) Y)4Zr_(0.5)>MgZn0.5 Y4 Zr0.5>MgY_4Zr_(0.5). The effect of different contents of Zn(0, 0.5, 1.5, 3.0 wt.%) on hot tearing behavior of MgY_4Zr_(0.5) alloy was investigated using a constrained rod casting(CRC) apparatus equipped with a load cell and data acquisition system. The experimental results show that the addition of Zn element significantly increases hot tearing susceptibility(HTS) of the MgY_4Zr_(0.5) alloy due to its extended freezing range. Some free dendrite-like bumps and ruptured liquid films on the fracture surfaces were observed in all the fracture surfaces. These phenomena proved the fact that the hot tearing formation was caused by interdendritic separation due to lack of feeding at the end of solidification.

关键词： MgZnxY4Zr0.5 alloys microstructure thermal analysis hot tearing susceptibility

Prognostic value of pretreatment contrast-enhanced computed tomography in esophageal neuroendocrine carcinoma: A multicenter follow-up study

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World Journal of Gastroenterology 2020年第31期26卷 4680-4693页

作者： Yue zhou ping Hou Kai-Ji Zha feng Wang Kun zhou Wei He Jian-Bo Gao Department of Radiology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Department of Oncology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Department of Thoracic Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina

BACKGROUND The rare incidence of esophageal neuroendocrine carcinoma(NEC)and limited treatment experience result in insufficient clinical observations and unsuitable guidelines for its *** To investigate the prognostic value of pretreatment contrast-enhanced computed tomography(CT)characteristics in patients with esophageal *** Seventy-seven esophageal NEC patients who received contrast-enhanced CT at two hospitals were enrolled in this study from June 2014 to December *** clinical features and image characteristics were recorded *** survival analysis was performed using the Kaplan-Meier method and log-rank test,and multivariate analysis was carried out with a Cox proportional hazards *** The multivariate analysis performed using the Cox proportional hazards model showed that N stage,adjuvant chemotherapy,and degree of enhancement were independent prognostic factors for overall survival(OS).Meanwhile,adjuvant chemotherapy was an independent prognostic factor for progression-free survival(PFS).The hazard ratios(HRs)of N stage,adjuvant chemotherapy,and degree of enhancement(mild vs moderate/marked)for OS were 0.426(P=0.024),3.862(P=0.006),and 2.169/0.809(P=0.037),*** HR of adjuvant chemotherapy for PFS was 6.432(P<0.001).Adjuvant chemotherapy was significantly associated with degree of enhancement(P=0.018).CONCLUSION Adjuvant chemotherapy is an independent prognostic factor for OS and ***,N stage and degree of enhancement are prognostic factors for OS in patients with esophageal NEC.

关键词： Esophageal neuroendocrine carcinoma Computed tomography Prognosis Survival Follow-up Adjuvant chemotherapy

Fabrication of Two-dimensional Monolayer and One-dimensional Wire of Zn-tetra-[3,5-di-t-butylphenyl]-porphyrin on Cu(100) Surface

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Chinese Journal of Structural Chemistry 2006年第8期25卷 992-996页

作者： QIAN Li-ping WANG Xian XU Di WANG zhou-feng JIANG Zhong-Jie DENG Wen-Li College of Materials Science and Engineering South China University of Technology Guangzhou 510640 China

We describe in this paper the fabrication of two- and one-dimensional nanostructures with organic molecular beam epitaxy （OMBE） principle based on controlled selfassembly by using adsorbate-substrate and intennolecular interactions that are important in molecular fabrication. Cu（100） single crystal was used as substrate in fabricating molecular nanostructures. Scanning tunneling microscopy （STM） experiments confirmed that Zn-tetra- [3,5-di-t-butylphenyl]porphyrin-molecules can be used to fabricate both monolayer and molecular wire on Cu（100） surface simultaneously, and the latter is arranged on the terrace edges. We herein briefly discuss the selectivity in terms of a mechanism in which the highest occupied and lowest unoccupied molecular orbitals （HOMO and LUMO） of the molecules interact with the surface.

关键词： fabrication two-dimensional monolayer one-dimensional molecular wire Zn-tetra-[3,5-di-t-butylphenyl]porphyrin

Lubricating properties of ester oil prepared from bio-based 2,5-furandicarboxylic acid

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Friction 2020年第2期8卷 360-369页

作者： Mingjin FAN Jia Al Shuai ZHANG Chenlu YANG Xin DU ping WEN Xiangyuan YE feng zhou Weiming LIU Shanxi Key Laboratory of Phytochemistry College of Chemistry&Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China College of Chemistry and Molecular Science Wuhan UniversityWuhan 430072China

The depletion of petroleum resources and the intensification of environmental problems have necessitated the development of renewable products from bio-based chemicals instead of petroleum ***,a new kind of ester lubricating oil,isooctyl furan dicarboxylate(isooctyl-FD),was prepared from bio-based 2,5-furandicarboxylic *** structure of isooctyl-FD was evaluated using nuclear magnetic resonance imaging and high-resolution mass *** physicochemical and tribological properties including thermal and oxidation stabilities,flash point and pour point,viscosity and viscosity index,and friction-reducing and anti-wear properties were systematically *** results show that isooctyl-FD has comparable thermal and oxidation stability to the synthetic ester lubricating oil,isooctyl sebacate(isooctyl-S).Its friction-reducing and anti-wear properties are superior to isooctyl-S;however,its viscosity-temperature and low-temperature properties are inferior to isooctyl-S.

关键词： 2,5-furandicarboxylic acid synthetic ester bio-based platform compound lubricating oil