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The effects of hydrogen bonding on the shear viscosity of liquid water

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International Journal of Sediment Research 2019年第1期34卷 8-13页

作者： hongwei fang Ke Ni Jian Wu Jun Li Lei Huang Danny Reible State Key Laboratory of Hydro-science and Engineering Department of Hydraulic EngineeringTsinghua University State Key Laboratory of Low-Dimensional Quantum Physics Department of PhysicsTsinghua University Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua University Department of Civil & Environmental Engineering Texas Tech University

As one of the fundamental physical properties of fluids, viscosity is considered to be the result of intermolecular forces and molecular momentum exchange. In this paper, we assume that hydrogen bonds, as the dominant intermolecular force, dominate the shear viscosity of liquid water and a relationship between the shear viscosity and hydrogen bonding is developed using dimensional analysis,which is further validated by computational chemistry methods. Water, methanol and ethanol are taken as examples to illustrate shear viscosity accounting for intermolecular forces and momentum exchange and their temperature dependence as a result of molecular thermal motions. The calculated shear viscosity of water is consistent with experimental data, which supports the idea that we can use the conceptual model to reveal the nature of shear viscosity.

关键词： Viscosity Hydrogen bonding Liquid water Dimensional analysis

CASE STUDIES OF THREE-DIMENSIONAL NUMERICAL SIMULATION FOR TOTAL SEDIMENT TRANSPORT

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International Journal of Sediment Research 2003年第2期18卷 158-165页

作者： hongwei fang China Department of Hydraulic Engineering Tsinghua University Beijing 100084

The calculation of flow and sediment transport is one of the most important tasks in river engineering. The task is particularly difficult because of the many complex and interacting physical phenomena that need to be accounted for realistically in a model that has predictive power. This paper presents two study cases of three-dimensional calculation, respectively, of suspended sediment transport for the Three Gorges Project on the Yangtze River, China, and of bed load transport on the Elbe River, Germany. The suspended sediment transport calculation and bed load transport calculation are compared with experimental data whenever possible.

关键词： Study case Three-dimensional modeling Suspended sediment Bed load

APPLICATION OF THE MULTIGRID METHOD IN NUMERICALSIMULATION OF SEDIMENT TRANSPORT

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International Journal of Sediment Research 1999年第2期14卷 133-143页

作者： ZHAO Yongqing and fang hongwei ( Sediment Research Lab, Tsinghua University, Beijing 100084, China)

By combining FAS (Full Approximate Scheme) for nonlinear equations of multigrid method with Finite Volume Method, a plane two-dimensional mathematical model of sediment-transport is presented in this paper The analysis on the efficiency of this model shows that it can reduce the amount of computation greatly. Numerical simulation results of the Yellow River Langdian Water Source Project agree well with the test results of the physical model.

关键词： Multigrid method Mathematical model Sediment transport

B-cell-derived IL-10 promotes allergic sensitization in asthma regulated by Bcl-3

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Cellular & Molecular Immunology 2023年第11期20卷 1313-1327页

作者： Guojun Qian Wenxia Jiang Donglin Sun Zhun Sun Anning Chen hongwei fang Jingyao Wang Yongzhong Liu Zhinan Yin Haiming Wei Hao fang Xiaoren Zhan Affiliated Cancer Hospital/Institute and GMU-GIBH Joint School of Life Sciences of Guangzhou Medical University The Guangdong-Hong Kong-Macao Joint Laboratory for Cell Fate Regulation and DiseasesState Key Laboratory of Respiratory Disease511436GuangzhouChina Shanghai Institute of Nutrition and Health Chinese Academy of Sciences200031ShanghaiChina Department of Anesthesiology Zhongshan HospitalFudan University200032ShanghaiChina Shanghai Cancer Institute Renji HospitalShanghai Jiao Tong University School of Medicine200032ShanghaiChina Zhuhai People’s Hospital Biomedical Translational Research InstituteJinan University510632GuangzhouChina Institute of Immunology University of Science and Technology of China230000HefeiChina Department of Anesthesiology Minhang HospitalFudan University201100ShanghaiChina Key Laboratory of Anesthesiology(Shanghai Jiao Tong University) Ministry of Education200001ShanghaiChina

Aeroallergen sensitization,mainly mediated by lung epithelium and dendritic cells(DCs),is integral to allergic asthma pathogenesis and ***-10 has a dual role in immune responses,as it inhibits myeloid cell activation but promotes B-cell responses and epithelial cell ***,we report a proinflammatory function of B-cell-derived IL-10 modulated by Bcl-3 in allergic ***,Bcl-3^(−/−)mice showed elevated IL-10 levels and were found to be highly vulnerable to allergic asthma induced by house dust mites(HDMs).IL-10 had a positive correlation with the levels of the DC chemoattractant CCL-20 in HDM-sensitized mice and in patients with asthma and induced a selective increase in CCL-20 production by mouse lung epithelial *** of IL-10 or IL-10 receptors during sensitization dampened both HDM-induced sensitization and asthma ***-10 levels peaked 4 h post sensitization with HDM and IL-10 was primarily produced by B cells under Bcl-3–Blimp-1–Bcl-6 *** lacking B-cell-derived IL-10 displayed decreased lung epithelial CCL-20 production and diminished DC recruitment to the lungs upon HDM sensitization,thereby demonstrating resistance to HDM-induced ***,responses to HDM stimulation in Bcl-3^(−/−)mice lacking B-cell-derived IL-10 were comparable to those in Bcl-3^(+/+)*** results revealed an unexpected role of B-cell-derived IL-10 in promoting allergic sensitization and demonstrated that Bcl-3 prevents HDM-induced asthma by inhibiting B-cell-derived IL-10 ***,targeting the Bcl-3/IL-10 axis to inhibit allergic sensitization is a promising approach for treating allergic asthma.

关键词： Bcl-3 Plasma cell IL-10 Allergic sensitization Airway inflammation Asthma

Coast in California San Diego

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International Journal of Sediment Research 2020年第3期 226-226页

作者： hongwei fang

Design and Movement Simulation to the Cam of the Testing Device for Capacitor Encapsulation Equipment

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Open Journal of Modelling and Simulation 2014年第4期2卷 138-143页

作者： hongwei fang Guoquan Zhang Jiaqing Jian Machine Engineering Department Wuhan Polytechnic University Wuhan China

In this paper, in order to design a cam mechanism be up to the mustard, a set of methods are put forward that using the Visual Basic programming language based on solidworks to draw cam contour line and then get its 3D models and generate the cam motion simulation by the solidworks motion. In the end, it’s proved that the cam designed though this method met the requirement.

关键词： Visual Basic Programming Language Cam Contour Line Motion Simulation

基于RS算法的同步发电机定子绕组内部故障分析和保护

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电工技术学报 2007年第6期22卷 48-53页

作者：方红伟夏长亮天津大学电气与自动化工程学院天津300072

基于RS分析方法利用分形维数对同步发电机定子绕组内部故障的稳态和暂态过程进行了研究,通过对计算机仿真数据和动模实验数据的分形维数分析,得出两个有用的规律:故障信号暂态波形的分形维数是内部故障类型的定量表达,且与其频谱分布相... 详细信息

基于RS分析方法利用分形维数对同步发电机定子绕组内部故障的稳态和暂态过程进行了研究,通过对计算机仿真数据和动模实验数据的分形维数分析,得出两个有用的规律:故障信号暂态波形的分形维数是内部故障类型的定量表达,且与其频谱分布相关性很强;故障信号稳态或暂态波形的分形维数反映了故障前后电机状态的变化,可以作为电机故障检测的判据,但在实际应用前这种方法必须同其他方法结合。最后,提出了利用分形维数检测发电机异常状态,并使用发电机端部负序功率的流向区别内外故障的新方法。该方法用来检测故障和输出跳变信号的总时间在50Hz信号的半个周期内,能双重区别内外部故障,为发电机定子绕组内部故障保护和诊断提供了新思路,具有很好的应用潜力。

关键词：内部故障分形维数 RS分析负序功率保护

基于海洋捕食者算法的波浪能转换装置模型预测控制

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中国电机工程学报 2024年第4期44卷 1468-1480,I0018页

作者：方红伟魏秀娜天津大学电气自动化与信息工程学院天津市南开区300072

该文提出一种基于智能海洋捕食者算法的模型预测控制策略,实现了波浪能转换装置的动态最大能量捕获。提出的模型预测控制策略利用海洋捕食者算法来获取最优控制力,并采用非线性限制来控制功率的单向流动。通过相应的对比分析验证了海洋... 详细信息

该文提出一种基于智能海洋捕食者算法的模型预测控制策略,实现了波浪能转换装置的动态最大能量捕获。提出的模型预测控制策略利用海洋捕食者算法来获取最优控制力,并采用非线性限制来控制功率的单向流动。通过相应的对比分析验证了海洋捕食者算法的优化准确性和快速收敛性。该方法还利用控制域来处理最优控制变量以便在算法的计算负担和优化准确度之间进行平衡。所提出的方法证明在处理多维的波浪能转换系统方面,特别是系统的非凸和非线性限制问题,具有较好的利用价值。仿真与实验结果证明提出的方法能较好地提高波浪能转换装置的输出功率,并满足典型海域工况下的实时需求。

关键词：海洋捕食者算法模型预测控制单向功率流动限制波浪能转换

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基于ANP滑坡灾害风险评价反馈系统的构建

辽宁工程技术大学学报（自然科学版） 2017年第5期36卷 476-483页

作者：方宏伟东北电力大学建筑工程学院土木工程系吉林吉林132012

针对网络分析法ANP(Analytic Network Process)在防治工程决策中的应用及滑坡灾害风险评价体系尚有多种类型等问题,通过分析滑坡灾害危险性、易损性、破坏损失、防治工程四个评价内容的反馈作用,应用ANP构建了滑坡灾害风险评价反馈系统... 详细信息

针对网络分析法ANP(Analytic Network Process)在防治工程决策中的应用及滑坡灾害风险评价体系尚有多种类型等问题,通过分析滑坡灾害危险性、易损性、破坏损失、防治工程四个评价内容的反馈作用,应用ANP构建了滑坡灾害风险评价反馈系统.以超级决策软件SD(Super Decision)为计算工具,以绝对权重为评价指标,通过土质和岩质滑坡实例的计算结果与工程实践及已有研究结论的对比验证了反馈系统的正确性.研究结果表明:相对于传统的层次分析法AHP(Analytic Hierarchy Process),ANP反馈系统可以同步实现危险性评价因子重要度排序和防治方案优化决策;该反馈系统可应用于滑坡灾害风险评价,并实现了在防治方案优化决策中的应用.

关键词：滑坡灾害风险评价网络分析法ANP 反馈系统判断矩阵危险性评价:防治方案优化决策