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Numerical Study of φ^4 Model by Potential Importance Sampling Method

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Communications in Theoretical Physics 2006年第5期45卷 873-876页

We investigate the phenomena of spontaneous symmetry breaking for φ^4 model on a square lattice in the parameter space by using the potential importance samplingmethod, which was proposed by Milchev, Heermann, and Binder [J. Star. Phys. 44 （1986） 749]. The critical values of the parameters allow us to determine the phase diagram of the model. At the same time, some relevant quantifies such as susceptibility and specific heat are also obtained.

关键词： symmetry breaking potential importance sampling method φ4 model

The Edge Magnetization and Strip Phase of Graphene Quantum Dots with Long-Range Coulomb Interaction

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Chinese Physics Letters 2014年第4期31卷 150-154页

作者： LINing ZHU Wen-Huan LIANG Qi ding guo-hui Instrumental Analysis Center Shanghai Jiao Tong University Shanghai 200240 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Bducation) Department of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240

We investigate the magnetism and optical absorption properties of charge neutral hexagonal graphene quantum dots （GODs） terminated with zigzag edges by using a tight-binding Hubbard type model for the 7r electrons. Within the Hartree Fock approximation and taking into account the long-range Coulomb interaction, our cal- culation yields a ferromagnetic ground state with magnetic moments localized on the edges for GODs, and also gives an antiferromagnetism state with the energy very c/ose to the ferromagnetism ground state. We find that both the ferromagnetic and the antiferrornagnetic states have stripe patterned charge density distributions as a result of the long-range Coulomb interaction. The optical conductivity for GQDs has an energy gap in the low frequency regime in contrast to the bulk neutral graphene sheet where a universal constant is approached.

关键词： Interaction The Edge Magnetization magnetism

丙酚替诺福韦治疗失代偿期乙型肝炎肝硬化应答不佳/低病毒血症的疗效及安全性

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肝脏 2024年第5期29卷 504-507,541页

作者：曾阿娟李磊丁惠国首都医科大学附属北京佑安医院肝病消化中心北京100069 北京积水潭医院消化科

目的评估丙酚替诺福韦(tenofovir alafenamide,TAF)单药治疗失代偿期乙型肝炎肝硬化应答不佳/低病毒血症(LLV)患者的效果和安全性。方法纳入经治应答不佳/LLV失代偿期乙型肝炎肝硬化患者56例,转换为TAF单药治疗,每12周进行1次随访。根... 详细信息

目的评估丙酚替诺福韦(tenofovir alafenamide,TAF)单药治疗失代偿期乙型肝炎肝硬化应答不佳/低病毒血症(LLV)患者的效果和安全性。方法纳入经治应答不佳/LLV失代偿期乙型肝炎肝硬化患者56例,转换为TAF单药治疗,每12周进行1次随访。根据基线HBV DNA水平,分为LLV组(HBV DNA0.05)。48周的血清HBsAg定量和HBV DNA水平较基线分别下降0.44和3.38 lgIU/mL,差异有统计学意义(P0.05)。结论经核苷(酸)类似物抗病毒治疗的失代偿期乙型肝炎肝硬化患者因应答不佳/LLV转换为TAF单药治疗后,病毒学抑制率及ALT复常率显著提高,肝功能得到改善,安全性良好。

关键词：低病毒血症抗病毒治疗失代偿期乙型肝炎肝硬化丙酚替诺福韦肾功能

Phase Transition of Spin-Peierls Systems with Impurities

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Chinese Physics Letters 2000年第8期17卷 552-554页

作者： XU Bo-Wei ding guo-hui YE Fei Department of Physics Shanghai Jiao Tong UniversityShanghai 200030

The quasi-one-dimensional spin-Peierls(SP)systems with impurities are studied in their bosonized *** spins of the dimerized state are bounded into singlets with an SP gap,while the impurities of doped systems will induce fluctuations of the coupling strength between the spins at different sites and break some pairs of spin *** doping suppresses the dimerized SP state and induces a Kosterlitz-Thouless phase transition from the dimerized state into the undimerized one.

关键词： form. singlet dimer

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人类基因组数据标准化研究

中国标准化 2024年第13期 71-76页

作者：任程许俊王萍萍丁国徽上海国际人类表型组研究院

人类基因组数据具有“大数据”的特征,面临如何管、如何用的问题。本文梳理了人类基因组数据相关政策法规,阐述了人类基因组数据应用面临的问题,分析探讨了人类基因组数据标准化现状和需求,提出了人类基因组数据标准体系的总体框架,以... 详细信息

人类基因组数据具有“大数据”的特征,面临如何管、如何用的问题。本文梳理了人类基因组数据相关政策法规,阐述了人类基因组数据应用面临的问题,分析探讨了人类基因组数据标准化现状和需求,提出了人类基因组数据标准体系的总体框架,以期为推进人类基因组数据的管理和安全利用提供指导。

关键词：人类基因组数据标准体系数据管理共享利用标准化

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Liquid-Gas Transition in the Ionic System

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Chinese Physics Letters 1996年第7期13卷 500-503页

作者： ding guo-hui XU Bo-wei Department of Physics Shanghai Jiaotong UniversityShanghai 200030

The phase transition in the ionic system in dimension d=3 is studied in the formulation of quantum sine-Gordon field *** a variational method the phase diagram is investigated,and the critical point terminating the co... 详细信息

关键词： theory conducting Transition

An experimental study on effects of temperature gradient on microstructure of a 308L stainless steel manufactured by directed energy deposition

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Journal of Iron and Steel Research International 2024年第8期31卷 2031-2040页

作者： Ting Dai De-yu Gu Yu-wen Qiu Wei guo hui ding Yi-wei Sun School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Metallic MaterialsSoutheast UniversityNanjing 211189JiangsuChina

The effect of spatial temperature gradient on the microstructural evolution of a 308L stainless steel during the directed energy deposition(DED)process was experimentally investigated.A novel cooling system was designed and incorporated to a DED system in order to control the temperature gradient along the deposition direction during *** deposition,the workpiece was placed on a lifting platform,and as the deposition process proceeded,the platform and workpiece were gradually lowered into cooling water so that the temperature gradient along the deposition direction could be controlled and maintained stable during the deposition *** microstructure characterization results indicated that a deposition strategy with higher G and G/R values(where G is temperature gradient and R is solidification rate)produced finer cellular grains that were better aligned with the deposition direction,while a deposition strategy with lower G and G/R values produced columnar grains with larger primary arm spacing and less aligned with the deposition direction.

关键词： Additive manufacturing Directed energy deposition Stainless steel Microstructure Temperature gradient

Screening for Bioactive Compounds from Mulberry Leaves Combining Bio-Affinity Ultrafiltration with α-Glucosidase and Pancreatic Lipase

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Journal of Analysis and Testing 2024年第3期8卷 315-326页

作者： hui Zhang Guilin Chen Yongli Zhang Felix Wambua Muema Jun ding Mingquan guo CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical Garden Chinese Academy of Sciences University of Chinese Academy of Sciences Institute of Biomedical Engineering Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Cixi Institute of Biomedical Engineering

With the growing prevalence of diabetes and obesity worldwide, the role of α-glucosidase and lipase inhibitors has gained increasing concentration. Mulberry, a functional medicinal and edible plant, has been reported extensively in alleviating both diabetes and obesity. However, there is still a lack of refined research on its active ingredients and mechanisms. In our study, the inhibitory activities of mulberry leaf against α-glucosidase and pancreatic lipase reached 191.37 ± 14.46 and 775 ± 68.60 μg/mL, respectively. Meanwhile, it also promoted glucose consumption in the HepG2 cells model. Subsequently,four α-glucosidase ligands and four pancreatic lipase ligands were identified through bio-affinity ultrafiltration combined with liquid-chromatography-mass spectrometry(UF-HPLC–MS/MS). In vitro inhibition assays confirmed the inhibitory potential of these representative ligands. Molecular docking suggested that these possible ligands could be inserted into the active pocket of the target enzyme through multiple intermolecular forces. Our findings indicated that the polyphenols in mulberry leaves may contribute significantly to their hypoglycemic and hypolipidemic properties. Furthermore, our study provides valuable insights for the screening of active ingredients in other medicinal and edible plants, which could help in the development of new therapies for diabetes and obesity.

关键词： Bio-affinity ultrafiltration Diabetes Mulberry leaves Obesity

Pharmacological management of portal hypertension:current status and future

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Chinese Medical Journal 2020年第19期133卷 2362-2364页

作者： Zhu-Qing Gao Ying Han Lei Li hui-guo ding Department of Gastroenterology and Hepatology Beijing You'an Hospital Affiliated to Capital Medical UniversityBeijing 100069China.

Portal hypertension(PHT)is the trigger of the severe complications of cirrhosis,in eluding esophagogastric variceal bleeding(EVB),ascites,hepatic encephalopathy,cirrhotic cardiomyopathy,acute kidney injury and hepatorenal syndrome(AKI-HRS),which may cause death or increase the need for liver transplantation.11Of these,EVB remains one of the deadliest complications of *** of now,the most widely accepted measure to assess portal pressure(PP)and PHT is the hepatic venous pressure gradient(HVPG)via transjugular-hepatic vein balloon catheterization?

关键词： hypertension balloon hepatic