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Ranking parameters in urban energy models for various building forms and climates using sensitivity analysis

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建筑模拟(英文) 2023年第9期16卷 1587-1600页

作者： Aysegul demir Dilsiz Kaitlynn Ng Jérôme Kämpf Zoltan Nagy Department of Civil and Architectural Engineering and Construction Management University of WyomingLaramie WYUSA Intelligent Environments Lab Department of CivilArchitectural and Environmental EngineeringThe University of Texas at AustinAustin TXUSA Energy Informatics Group Idiap Research Institute1920 MartignySwitzerland

Urban Building Energy Modelling(UBEM)allows us to simulate buildings’energy performances at a larger ***,creating a reliable urban-scale energy model of new or existing urban areas can be difficult since the model requires overly detailed input data,which is not necessarily publicly *** calibration is a necessary step to reduce the uncertainties and simulation results in order to develop a reliable and accurate *** to the concerns over computational resources and the time needed for calibration,a sensitivity analysis is often required to identify the key parameters with the most substantial impact before the calibration is deployed in ***,we study the sensitivity of uncertain input parameters that affect the annual heating and cooling energy demand by employing an urban-scale energy model,*** goal is to determine the relative influence of each set of input parameters and their interactions on heating and cooling loads for various building forms under different ***,we conduct a global sensitivity analysis for annual cooling and heating consumption under different climate *** upon this,we investigate the changes in input sensitivity to different building forms,focusing on the indices with the largest Total-order ***,we determine First-order indices and Total-order effects of each input parameter included in the urban building energy *** also provide tables,showing the important parameters on the annual cooling and heating demand for each climate and each building *** find that if the desired calibration process require to decrease the number of the inputs to save the computational time and cost,calibrating 5 parameters;temperature set-point,infiltration rate,floor U-value,*** U-value and roof U-value would impact the results over 55%for any climate and any building form.

关键词： global sensitivity analysis Sobol’method urban energy modeling building stocks energy modelling parameter screening Sobol’indices sustainable urban planning

基于广义可扩展RPCA滤波的超快超声脑血流与功能成像方法研究

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仪器仪表学报 2024年第6期45卷 188-197页

作者：吴浩田闫少渊许凯亮他得安复旦大学生物医学工程系上海200438 复旦大学脑科学前沿科学中心上海200432 复旦大学集成芯片与系统全国重点实验室上海201203 上海波达医疗科技有限公司上海200433

开发高分辨和高灵敏度的小血管可视化技术,对相关组织病变的早期诊断和治疗监测具有重要的临床意义。不同于传统聚焦超声,超快超声多普勒(μDoppler)成像技术凭借数千帧的成像帧率,可检测到小血流的瞬时变化。组织杂波滤除和噪声抑制对... 详细信息

开发高分辨和高灵敏度的小血管可视化技术,对相关组织病变的早期诊断和治疗监测具有重要的临床意义。不同于传统聚焦超声,超快超声多普勒(μDoppler)成像技术凭借数千帧的成像帧率,可检测到小血流的瞬时变化。组织杂波滤除和噪声抑制对于μDoppler的成像质量至关重要。常用的杂波滤除方法为奇异值分解(SVD)方法,该方法利用信号时空相干性差异可快速实现组织杂波和血流信号分离,然而无法有效抑制噪声。本研究创新性提出了一种基于广义可扩展的鲁棒主成分分析(GSRPCA)的杂波滤除方法,使用Schatten p范数和lq范数来加强鲁棒主成分分析(RPCA)模型的低秩约束和稀疏约束,增强了小血流信号的提取能力。大鼠脑血流成像结果表明,GSRPCA能够提升功率多普勒成像中血管的成像质量,相较SVD提高信噪比约20 dB,且提高对比噪声比约10 dB。大鼠超声脑功能成像结果表明,GSRPCA能够提升小血管血容量动态检测的灵敏度。相关方法对超快超声成像杂波滤除的研究具有一定借鉴意义。

关键词：超快超声杂波滤除广义可扩展RPCA 脑血流功能成像

Impact of chosen force fields and applied load on thin film lubrication

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Friction 2021年第5期9卷 1259-1274页

作者： Thi D.ta Hien D.ta Kiet A.TIEU Bach H.TRAN School of Mechanical MaterialsMechatronicsand Biomedical EngineeringUniversity of WollongongNSW 2522Australia Ho Chi Minh City University of Technology and Education Ho Chi Minh City 800010Vietnam

The rapid development of molecular dynamics(MD)simulations,as well as classical and reactive atomic potentials,has enabled tribologists to gain new insights into lubrication performance at the fundamental ***,the impact of adopted potentials on the rheological properties and tribological performance of hydrocarbons has not been researched *** extensive study analyzed the effects of surface structure,applied load,and force field(FF)on the thin film lubrication of *** lubricant film became more solid‐like as the applied load *** particular,with increasing applied load,there was an increase in the velocity slip,shear viscosity,and *** degree of ordering structure also changed with the applied load but rather *** was also significantly dependent on the surface *** chosen FFs significantly influenced the lubrication performance,rheological properties,and molecular *** adaptive intermolecular reactive empirical bond order(AIREBO)potential resulted in more significant liquid‐like behaviors,and the smallest velocity slip,degree of ordering structure,and shear stress were compared using the optimized potential for liquid simulations of united atoms(OPLS‐UAs),condensed‐phase optimized molecular potential for atomic simulation studies(COMPASS),and ***,classical potentials,such as OPLS‐UA and COMPASS,exhibit more solid‐like behavior than reactive potentials ***,owing to the solid‐like behavior,the lubricant temperatures obtained from OPLS‐UA and COMPASS were much lower than those obtained from AIREBO and *** increase in shear stress,as well as the decrease in velocity slip with an increase in the surface potential parameterζ,remained conserved for all chosen FFs,thus indicating that the proposed surface potential parameterζfor the COMPASS FF can be verified for a wide range of atomic models.

关键词： molecular dynamics simulation force fields applied load tribofilm hydrocarbon

Mucosa-associated microbiota alterations in primary sclerosing cholangitis(PSC)before and after liver transplantation-who is calling the shots?

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Hepatobiliary Surgery and Nutrition 2023年第5期12卷 795-797页

作者： Münevver demir Michael Sigal Department of Hepatology and Gastroenterology Campus Virchow-Klinikum and Campus CharitéMitteCharitéUniversitätsmedizin BerlinBerlinGermany Berlin Institute for Medical Systems Biology Max Delbrück Center for Molecular MedicineBerlinGermany

Primary sclerosing cholangitis(PSC)is an immune-related chronic cholangiopathy associated with high rates of progression to liver cirrhosis and the need for liver *** PSC is frequently associated with inflammatory bowel disease(IBD),several studies have investigated the role of the gut-liver axis in PSC and emerging evidence indicates that gut and bile microbiota are associated with the onset and progression of PSC[reviewed in(1)].

关键词： Primary sclerosing cholangitis(PSC) liver transplantation Klebsiella microbiota mucosal microbiota

Unit-cell design for two-dimensional phase-field simulation of microstructure evolution in single-crystal Ni-based superalloys during solidification

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Progress in Natural Science:Materials International 2017年第6期27卷 678-686页

作者： Dongjia Cao Na ta Lijun Zhang State Key Lab of Powder Metallurgy Central South University Interdisciplinary Centre for Advanced Materials Simulation (ICAMS) Ruhr-University Bochum

Phase-field simulation serves as an effective tool for quantitative characterization of microstructure evolution in single-crystal Ni-based superalloys during solidification nowadays. The classic unit cell is either limited to γdendrites along crystal orientation or too ideal to cover complex morphologies for γ dendrites. An attempt to design the unit cell for two-dimensional(2-D) phase-field simulations of microstructure evolution in single-crystal Ni-based superalloys during solidification was thus performed by using the MICRESS(MICRostructure Evolution Simulation Software) in the framework of the multi-phase-field(MPF) model,and demonstrated in a commercial TMS-113 superalloy. The coupling to CALPHAD(CALculation of PHAse Diagram) thermodynamic database was realized via the TQ interface and the experimental diffusion coefficients were utilized in the simulation. Firstly, the classic unit cell with a single γ dendrite along crystal orientation was employed for the phase-field simulation in order to reproduce the microstructure ***, such simple unit cell was extended into the cases with two other different crystal orientations, i.e., and . Thirdly, for crystal orientations, the effect of γ dendritic orientations and unit cell sizes on microstructure and microsegregation was comprehensively studied, from which a new unit cell with multiple γdendrites was proposed. The phase-field simulation with the newly proposed unit cell was further performed in the TMS-113 superalloy, and the microstructure features including the competitive growth of γ dendrites,microsegregation of different solutes and distribution of γ′ grains, can be nicely reproduced.

关键词： Ni-based superalloys Solidification Microstructure Phase-field simulation Unit cell

Developments in 4D-printing:a review on current smart materials,technologies,and applications

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International Journal of Smart and Nano Materials 2019年第3期10卷 205-224页

作者： Zhizhou Zhang Kahraman G.demir Grace X.Gu Department of Mechanical Engineering University of CaliforniaBerkeleyCAUSA

Recent advances in additive manufacturing(AM),commonly known as three-dimensional(3D)-printing,have allowed researchers to create complex shapes previously impossible using traditional fabrication methods.A research branch that originated from 3D-printing called four-dimensional(4D)-printing involves printing with smart materials that can respond to external stimuli.4Dprinting permits the creation of on-demand dynamically controllable shapes by integrating the dimension of *** achievements in synthetic smart materials,novel printers,deformation mechanism,and mathematical modeling have greatly expanded the feasibility of *** this paper,progress in the 4Dprinting field is reviewed with a focus on its practical *** discuss smart materials developed using 4D-printing with explanations of their morphing ***,case studies are presented on self-constructing structures,medical devices,and soft *** conclude with challenges and future opportunities in the field of 4D-printing.

关键词： 3D-printing 4D-printing smart materials multifunctional soft robotics

提质培优背景下农类高职院校“双师型”教师队伍建设路径研究

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创新创业理论研究与实践 2024年第13期7卷 140-142页

作者：他淑君郑芳福建农业职业技术学院福建福州350000

提升高职院校教师“双师”素质是职业教育“三教”改革攻坚的必然要求,也是职业教育提质培优行动计划实施的重要内容。农类高职院校是培养“三农”发展所需技术技能型人才的重要基地,“双师型”教师队伍建设是培养高素质技术技能型人才... 详细信息

提升高职院校教师“双师”素质是职业教育“三教”改革攻坚的必然要求,也是职业教育提质培优行动计划实施的重要内容。农类高职院校是培养“三农”发展所需技术技能型人才的重要基地,“双师型”教师队伍建设是培养高素质技术技能型人才的关键。该文挖掘提质培优行动计划赋予农类高职院校“双师型”教师能力的新内涵,分析农类高职院校“双师型”教师队伍建设面临的问题,从3个方面提出农类高职院校“双师型”教师队伍建设策略,为进一步推动新阶段农类高职院校“双师型”教师队伍建设提供一定借鉴。

关键词：提质培优农类高职院校 “双师型”教师能力内涵困境建设路径

Effects of rhamnolipid biosurfactant JBR425 and synthetic surfactant Surfynol465 on the peroxidase-catalyzed oxidation of 2-naphthol

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Journal of Environmental Sciences 2013年第7期25卷 1431-1440页

作者： Ivanec-Goranina Rūta Kulys Juozas Department of Chemistry and Bioengineering Faculty of Fundamental Sciences Vilnius Gediminas Technical University Institute of Biochemistry Vilnius University

The kinetics of the recombinant Coprinus cinereus peroxidase-catalyzed2-naphthol oxidationwas investigated in the presence of rhamnolipid biosurfactant JBR425 and synthetic surfactant Surfynol465 at pH 5.5 and25°C,with concentrations of （bio）surfactants both less than critical micelle concentrations （CMC） and larger than CMC. Itwas shown that monomers of JBR425 aswell as monomers of Surfynol465 had an enhancing effect on the conversion of2-naphthol indose response manner anddid not influence the initial rate of 2-naphthol oxidation. The resultswere accounted by a scheme,which contains a stadium of enzyme inhibition by oligomeric2- naphthol oxidation products. The action of the biosurfactant＇s （or synthetic surfactant＇s） monomerswas explained by avoidance of the enzyme active center clothingwith oligomers. Similar results havedemonstrated the potential of rhamnolipid biosurfactant JBR425due to its biodegradability. When biosurfactants＇ concentrations are larger than CMC, （bio）surfactants have an opposite effect on the oxidation of2-naphthol by peroxidase.

关键词： oxidation peroxidase biosurfactant critical micelle concentration

以城市命名的大道规划设计分析——以揭阳大道为例

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交通工程 2024年第2期24卷 68-74页

作者：塔建胡劲松广州市交通规划研究院有限公司广州510030

“大道”是道路通名等级划分中的最高级别,以城市名称命名的“大道”是1座城市的代表路,具有唯一性.本文首先给出了“大道”的界定,提出城市大道是1座城市的名片,能加深人们的归属感与认同感,提高城市知名度,并应执行高标准规划设计要求... 详细信息

“大道”是道路通名等级划分中的最高级别,以城市名称命名的“大道”是1座城市的代表路,具有唯一性.本文首先给出了“大道”的界定,提出城市大道是1座城市的名片,能加深人们的归属感与认同感,提高城市知名度,并应执行高标准规划设计要求;以揭阳市揭阳大道为例,分析了其规划定位和交通功能定位;最后从交通提速、慢行提升、景观提质等方面提出揭阳大道精细化、人性化、品质化设计方案.相关分析及设计理念可供类似项目参考借鉴.

关键词：道路命名大道揭阳大道定位规划设计