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On the Small Time Asymptotics of the Dynamical Φ_(1)^(4)Model

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Acta Mathematica Sinica,English Series 2021年第3期37卷 436-446页

作者： bing guang CHEN Xiang Chan ZHU Academy of Mathematics and Systems Science Chinese Academy of ScienceBeijing 100190P.R.China Department of Mathematics University of BielefeldD-33615 BielefeldGermany

In this paper,we establish a small time large deviation principle(small time asymptotics)for the dynamicalΦ_(1)^(4)model,which not only involves study of the space-time white noise with intensity√ε,but also the inv... 详细信息

关键词： Φ_(1)^(4)model space-time white noise small time asymptotics large deviation

Large Deviation Principle for the Two-dimensional Stochastic Navier-Stokes Equations with Anisotropic Viscosity

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Acta Mathematicae Applicatae Sinica 2023年第3期39卷 511-549页

作者： bing-guang CHEN Xiang-chan ZHU Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China Department of Mathematics University of BielefeldD-33615 BielefeldGermany

In this paper we establish the large deviation principle for the the two-dimensional stochastic Navier-Stokes equations with anisotropic viscosity both for small noise and for short *** proof for large deviation principle is based on the weak convergence *** small time asymptotics we use the exponential equivalence to prove the result.

关键词： large deviation principle stochastic Navier-Stokes equations anisotropic viscosity small time asymptotics weak convergence approach

High coercivity Pr2Fe14B/α-Fe nanocomposite permanent magnets with Zr addition

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Rare Metals 2020年第1期39卷 41-47页

作者： Mehran Khan Alam guang-bing Han Shi-Shou Kang School of Physics Shandong UniversityJinan250100China

The ingots with nominal composition Pr9.5Fe84-xB6.4P0.1Zrx(x=0,1,2,3)were prepared by an electric arc furnace under purified argon *** ribbons were obtained by melt spinning at a wheel speed of16-33 m·s-1.X-ray diffraction(XRD)results show that P addition decreases crystallinity of hard phase,but further Zr addition increases the amorphous-forming ability of soft *** intrinsic coercivity largely increases from 502(Zr-free)to 945 kA·m-1(2 at%Zr),which is among the highest value reported so far in this poor rare earth nanocomposite *** hysteresis loops of the alloys with addition of 1 at%and 2 at%Zr show good squareness with single-phase characteristic,indicating well exchange coupling between hard and soft magnetic *** electron microscope(TEM)results reveal small grain size and uniformity in the microstructure in the Zradded samples,which is the reason for high coercivity.

关键词： Magnetic properties Coercivity Zr addition Nanocomposite magnets

Surface and interface analysis of HAP/TiO2 composite films on Ti6Al4V

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中国有色金属学会会刊：英文版 2004年第z1期14卷 193-198页

作者： SU bing ZHANG Weng-guang YU Xu-dong WANG Cheng-tao School of Mechanical and Power Engineering Shanghai Jiaotong University Shanghai 200030 China School of Mechanical and Power Engineering Shanghai Jiaotong University Shanghai 200030 China 1st Department Artillery Academy of PLA of China Hefei 230031 China School of Mechanical and Power Engineering Shanghai Jiaotong University Shanghai 200030 China

The composite films constituted of hydroxyapatite (HAP) submicron particles embedded in the gel composed of the titania nanoparticles were prepared on commercial Ti6Al4V plates with titania buffer layer obtained by a spin-coating technique. The films were annealed in air at 450 ℃, 550 ℃ and 650 ℃, respectively. The phase formation, surface morphology, andinterfacial microstructure of the films were investigated by X-ray diffraction(XRD),Fourier transform infrared spectroscopy (FT-IR), field emission-scanning electron microscopy(FE-SEM) and energy dispersive X-ray (EDS) analysis. The results show that the as-prepared films are all well-crystallized, dense,homogeneous, and there was a close interfacial bond between the film and the substrate. The results of adhesion test indicate that there is a good bonding strength between the film and the substrate. The bone-like apatite formation on the surface of the films after immersion in acellular simulatedbody fluid(SBF) validated their bioactivities.

关键词： titanium dioxide hydroxyapatite composite film spin-coating technique

Magnetic Performance of a Nanocomposite Permanent Material

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Chinese Physics Letters 2011年第8期28卷 293-296页

作者： LIU Min HAN guang-bing GAO Ru-Wei Department of Electronic Science Huizhou UniversityHuizhou 516007 School of Physics Shandong UniversityJinan 250100

We build a sandwiched structure model in which the intergranular phase(IP)is homogeneously distributed between soft and hard magnetic grains,and gives a continuously anisotropic expression of the coupling part under the assumption that the IP weakens the intergrain exchange-coupling *** on the idea that the hardening mechanism is of the pinning type,we calculate the effect of the IP's thickness d and its anisotropy constant K1(0)on the intrinsic coercivity of a nanocomposite permanent *** calculated results indicate that the domain wall goes twice through irreversible domain wall displacement during the process of moving from soft to hard magnetic grains,and the intrinsic coercivity increases with increasing d,but decreases with increasing K1(0).When d and K1(0)take 2 nm and 0.7Kh,respectively,with Kh being the anisotropy constant in the inner part of the hard magnetic grain,the calculated intrinsic coercivity is in good agreement with the experimental data.

关键词： grain anisotropy coupling

Aircraft noise exposure affects rat behavior,plasma norepinephrine levels,and cell morphology of the temporal lobe

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第12期12卷 969-975页

作者： Guo-qing DI bing ZHOU Zheng-guang LI Qi-li LIN Institute for Environmental Pollution Control Technology Zhejiang University Hangzhou 310058 China

In order to investigate the physiological effects of airport noise exposure on organisms,in this study,we exposed Sprague-Dawley rats in soundproof chambers to previously recorded aircraft-related noise for 65 *** comparison,we also used unexposed control *** was arranged according to aircraft flight schedules and was adjusted to its weighted equivalent continuous perceived noise levels(LWECPN) of 75 and 80 dB for the two experimental *** examined rat behaviors through an open field test and measured the concentrations of plasma norepinephrine(NE) by high performance liquid chromatography-fluorimetric detection(HPLC-FLD).We also examined the morphologies of neurons and synapses in the temporal lobe by transmission electron microscopy(TEM).Our results showed that rats exposed to airport noise of 80 dB had significantly lower line crossing number(P<0.05) and significantly longer center area duration(P<0.05) than control *** 29 d of airport noise exposure,the concentration of plasma NE of exposed rats was significantly higher than that of the control group(P<0.05).We also determined that the neuron and synapsis of the temporal lobe of rats showed signs of damage after aircraft noise of 80 dB exposure for 65 *** conclusion,exposing rats to long-term aircraft noise affects their behaviors,plasma NE levels,and cell morphology of the temporal lobe.

关键词： Aircraft noise Open field test Norepinephrine Neuron Synapse

Brominated Butyl Rubber Anticorrosive Coating and its Self-healing Behaviors

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Chinese Journal of Polymer Science 2023年第2期41卷 297-305页

作者： guang-bing Luo Bo Pang Xing-Qi Luo Yi Wang Hong Zhou Li-Juan Zhao College of Chemistry and Materials Science Sichuan Normal UniversityChengdu610066China The Second Research Institute of Civil Aviation Administration of China(CAAC) Chengdu610041China

Self-healing anticorrosive coatings in extreme environment have attracted considerable interest from *** this work,4-tert-butylpyridine(TBP)was incorporated into brominated butyl rubber(BIIR)polymer networks to form a reversible ionic bond with the highly reactive bromine *** on the low glass transition temperature of the BIIR polymer and the electrostatic effects,a robust self-healing anticorrosive coating of TBP-BIIR was ***-BIIR coating showed a maximum protection efficiency(PE)of more than 94%(TBP-BIIR-acid,94.37%;TBP-BIIR-alkali,94.95%;TBP-BIIR-salt,95.49%)when treated with a strong acid(HNO_(3),pH=2),strong base(NaOH,pH=12)and high salt solution(3.5 wt%NaCl).In addition,the PE of coating repaired exceed 89%,and the maximum PE value was approximately 95%in different solutions,which demonstrated its extinguished self-healing *** results indicated that the TBP-BIIR anticorrosive coating could provide excellent safety and durability in special environment,which would be extremely beneficial to improve the working life of metal parts used in aviation and shipping,oil and gas and related industries.

关键词： Brominated butyl rubber Self-healing Anticorrosive Coating

Diversity arrays technology (DArT) for studying the genetic polymorphism of flue-cured tobacco (Nicotiana tabacum)

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第7期14卷 570-577页

作者： Xiu-ping LU bing-guang XIAO Yong-ping LI Yi-jie GUI Yu WANG Long-jiang FAN Department of Agronomy Zhejiang University Yunnan Academy of Tobacco Agricultural Sciences and China Tobacco Breeding Research Center at Yunnan

Diversity arrays technology （DART） is a microarray-based marker system that achieves high throughput by reducing the complexity of the genome. A DArT chip has recently been developed for tobacco. In this study, we genotyped 267 flue-cured cultivars/landraces, including 121 Chinese accessions over five decades from widespread geographic regions in China, 103 from the Americas, and 43 other foreign cultivars, using the newly developed chip. Three hundred and thirty polymorphic DArT makers were selected and used for a phylogenetic analysis, which sug- gested that the 267 accessions could be classified into two subgroups, which could each be further divided into 2-4 sections. Eight elite cultivars, which account for 83% of the area of Chinese tobacco production, were all found in one subgroup. Two high-quality cultivars, HHDJY and Cuibil, were grouped together in one section, while six other high-yield cultivars were grouped into another section. The 330 DArT marker clones were sequenced and close to 95% of them are within non-repetitive regions. Finally, the implications of this study for Chinese flue-cured tobacco breeding and production programs were discussed.

关键词： Nicofiana tabacum Diversity arrays technology (DART) Genetic diversity Flue-cured tobacco

Possible benefit of splenectomy in liver transplantation for autoimmune hepatitis

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Hepatobiliary & Pancreatic Diseases International 2014年第3期13卷 328-331页

作者： Yan-Tian Xu De-Jie Liu Fan-Ying Meng guang-bing Li Jun Liu Department of Liver Transplantation and Hepatobiliary Surgery Shandong Provincial Hospital Affiliated to Shandong University Department of Anesthesiology Qilu Hospital of Shandong University

Liver transplantation for autoimmune hepatitis(AIH) is usually successful with excellent long-term outcomes,but primary disease may recur. The recurrence of AIH is a significant cause of graft loss. This study was to analyze the effect of splenectomy in preventing AIH relapse. The clinical courses of 12 patients who had transplantation for AIH were analyzed retrospectively. All patients were subjected to transplantation for end-stage liver disease caused by chronic AIH. Based on the duration of immunosuppressive treatment before liver transplantation, simultaneous splenectomy was performed in ten patients. Two patients underwent liver transplantation without splenectomy, one of them developed recurrent AIH and died from graft failure caused by AIH relapse. However, no episode of AIH recurrence was observed in patients who had undergone simultaneous *** might be an option to prevent AIH relapse in some patients with high risk factors.

关键词： autoimmune hepatitis liver transplantation recurrence splenectomy