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A general spatial-temporal framework for short-term building temperature forecasting at arbitrary locations with crowdsourcing weather data

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Building Simulation 2023年第6期16卷 963-982页

作者： Reisa f.widjaja wenbo wu Zhi Zhou Renhao Sun Hannah C.fontenot Bing Dong Department of Management Science&Statistics The University of Texas at San AntonioSan AntonioTX78249USA Energy Systems Division Argonne National LaboratoryLemontIL60439USA Department of Mechanical&Aerospace Engineering Syracuse UniversitySyracuseNY13244USA

weather forecasting has been a critical component to predict and control building energy consumption for better building energy *** accessibility to other data sources,the onsite observed temperatures or the airport temperatures are used in forecast *** this paper,we present a novel approach by utilizing the crowdsourcing weather data from neighboring personal weather stations(PwS)to improve the weather forecast accuracy around buildings using a general spatial-temporal modeling *** final forecast is based on the ensemble of local forecasts for the target location using neighboring *** approach is distinguished from existing literature in various ***,we leverage the crowdsourcing weather data from PwS in addition to public data *** this way,the data is at much finer time resolution(e.g.,at 5-minute frequency)and spatial resolution(e.g.,arbitrary location vs grid).Second,our proposed model incorporates spatial-temporal correlation information of weather variables between the target building and a set of neighboring PwSs so that underlying correlations can be effectively captured to improve forecasting *** demonstrate the performance of the proposed framework by comparing to the benchmark models on temperature forecasting for a building located at an arbitrary location at San Antonio,Texas,*** general,the proposed model framework equipped with machine learning technique such as Random forest can improve forecasting by 50%compares with persistent model and has 90%chance to outperform airport forecast in short-term *** a real-time setting,the proposed model framework can provide more accurate temperature forecasting results compared with using airport temperature forecast for most forecast ***,we analyze the sensitivity of model parameters to gain insights on how crowdsourcing data from the neighboring personal weather stations impacts forecasting ***,we implement

关键词： crowdsourcing data machine learning spatial temporal model weather forecasting

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A STUDY ON MICRO-PLASTIC DEfORMATION BEHAVIOR Of 2024 A1 ALLOY

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Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 502-507页

作者： f. Yang C. H. wu D. L. Sun School of Materials Science & Engineering Harbin Institute of Technology Harbin 150001 China

Dimensional stability properties of hot extruded 2024 Al alloy bar in T4 and T6 aging states and dif- ferent extruded directions were investigated by testing micro-yield strength (MYS), stress relaxation resistance (SRR), and dimensional change in thermal cycling and unloading *** results show that micro-plastic deformation resistance in longitudinal(parallel to the axis of the extruded bar) direction is higher than that in transverse(perpendicular to the axis of the extruded bar) direction. Testing in short-term loading condition MYS value corresponding to micro-plastic strain of 1 *10m^(-5)in longitudinal direction is 1.4 times than that in *** with the results of MYS and dimensional change in thermal cycling and unloading conditions, the values in T6 state are higher than that in T4 state. Using TEM the microstructures before micro-plastic deformation were *** analyses confirm that stability of thermodynamics condition and dislocation results in dimensional stability of the alloy.

关键词： 2024 Al alloy dimensional stability aging micro-yield strength stress relaxation

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Designing metallic glasses with optimal combinations of glass-forming ability and mechanical properties

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Journal of Materials Science & Technology 2021年第8期67卷 254-264页

作者： S.J.wu Z.Q.Liu R.T.Qu Z.f.Zhang Laboratory of fatigue and fracture for Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

It is a long-standing challenge to search for metallic glasses(MGs)with optimal combinations of glassforming ability(GfA),strength and toughness in the vast compositional *** taking into account both recently developed ellipse criterion and temperature-based GfA criterion,here we established quantitative correlations among compositions,elastic constants,GfA and mechanical properties of MGs,which enable to predict the GfA,fracture strength and fracture surface simultaneously in advance once the compositions of MGs are *** data confirm the validity of this approach in ***,a strategy for designing MGs with optimal combinations of strength,toughness and GfA is proposed,which allows for high-throughput discovering glass formers with excellent mechanical properties.

关键词： Metallic glass Composition Elastic constant Mechanical property Glass-forming ability

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Improvement on hydrogen generation properties of Zr(BH4)4·8NH3

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Progress in Natural Science:Materials International 2021年第1期31卷 41-46页

作者： D.f.wu L.Z.Ouyang J.M.Huang J.w.Liu H.wang X.S.Yang H.Shao M.Zhu School of Materials Science and Engineering Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials South China University of Technology Guangdong Research Institute of Rare Metals Guangdong Key Laboratory of Rare Earth Development and Application China-Australia Joint Laboratory for Energy & Environmental Materials Key Laboratory of Fuel Cell Technology of Guangdong Province Advanced Manufacturing Technology Research Centre Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering (IAPME) University of Macau

Hydrolysis of Zr(BH4)4·8NH3in deionized water can generate high purity hydrogen at room ***, the sluggish hydrolysis kinetics of Zr(BH4)4·8NH3hinders its practical use. To improve its hydrogen generation properties, the effects of magnetic stirring, changing hydrolysis solution and tuning the ammonia coordination number on the hydrolysis properties of Zr(BH4)4·8NH3were investigated. Results show that both changing hydrolysis solution and tuning the ammonia coordination number can enhance the hydrolysis *** hydrolysis kinetics properties of Zr(BH4)4·8NH3were significantly improved in MgCl2and *** Zr(BH4)4·8NH3(x ≤ 8) samples were synthesized by a ball-milling method with different ammonization time(10, 60 and 180 min). Both the hydrolysis kinetics and hydrogen yield of Zr(BH4)4·8NH3(x ≤ 8) were enhanced as the ammonia coordination number(x) decreased. Thus, tuning ammonia coordination number is an effective way to control the hydrolysis properties of Zr(BH4)4·8NH3(x ≤ 8).

关键词： Hydrogen production Zr(BH4)4·8NH3 Hydrolysis properties Ammonia coordination number

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QTL and candidate genes associated with common bacterial blight resistance in the common bean cultivar Longyundou 5 from China

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The Crop Journal 2016年第5期4卷 344-352页

作者： Jifeng Zhu Jing wu Lanfen wang Matthew w.Blair Zhendong Zhu Shumin wang Institute of Crop Science Chinese Academy of Agricultural Sciences Department of Agriculture & Environment Tennessee State University

Common bacterial blight(CBB), caused by Xanthomonas axonopodis pv. phaseoli and Xanthomonas fuscans subsp. fuscans(Xff), is a worldwide disease of common bean(Phaseolus vulgaris L.).Longyundou 5, a Chinese cultivar in the Mesoamerican gene pool of common bean, displays resistance to the Xff strain XSC3-1. To identify the genetic mechanisms behind this resistance,we crossed Long 5 with a susceptible genotype to develop a mapping population of f2 *** resistance to CBB was identified at 14 and 21 days after inoculation with Xff strain XSC3-1.A major QTL at 14 and 21 days after inoculation was mapped on chromosome Pv10 with LOD scores of 6.41 and 5.35, respectively. This locus was associated with SAP6, a previouslyidentified and much-used dominant marker, but in a 4.2 cM interval between new codominant markers BMp10s174 and BMp10s244. Ten candidate genes were found between markers BMp10s174 and BMp10s244 on chromosome Pv10 and could encode defense response proteins responding to CBB pathogens. four pairs each of epistatic QTL for CBB resistance were detected at 14 and 21 days after inoculation. Phenotypic variation explained by the epistatic QTL ranged from 7.19% to 12.15% and 7.72% to 8.80% at 14 and 21 days after inoculation, respectively. These results confirmed the importance of epistasis in CBB resistance in common bean. The adjacent markers found may be more efficient for marker assisted selection in common bean breeding for CBB resistance owing to their closer linkage to the target QTL.

关键词： Common bean(Phaseoius vulgaris L.) Common bacterial blight Quantitative trait locus Days after inoculation

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Mechanism of wavy vortex and sign laws in flow past a bluff body:vortex-induced vortex

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Acta Mechanica Sinica 2019年第1期35卷 1-14,I0001页

作者： L.M.Lin S.Y.Shi X.f.Zhong Y.X.wu Key Laboratory for Mechanics in fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Sciences University of Chinese Academy of SciencesBeijing 100049China

As reported in a previous work by Lin et al.(Acta Meeh Sin, 2018. https://***/10.1007/s 10409-018-0758-z), an interesting phenomenon was discovered based on the analysis of wavy vortex and vorticity distribution in the shear layers and near wake of a peak-perforated conic shroud, and two sign laws were summarized. In the present paper, the theory of a vortex-induced vortex is introduced to explore mechanisms in a wavy vortex and applicable sign laws for uniform and incompressible flow past a fixed bluff body. Based on the analysis of the nearest-wall How, two vortex-induced models for streamwise and vertical vortex pairs, respectively, are proposed under two boundary cases, denoting the induced vorticity introduced or distributed on and near the walls. As a result, the first sign law, for only streamwise and vertical components of vorticity, and the second sign law, for three components of vorticity, are obtained under their own particular conditions. The first sign law reveals the intrinsic physical relationship between streamwise and vertical vorticities, independent of the distribution of spanwise vortices in the whole flow.f.eld. It is also confirmed that the spanwise vortices, as well as the shear layers and wake width, distributed wavily across the span, are attributed to the introduced streamwise or vertical vortices. The two sign laws for vorticity are independent of the disturbed spanwise wavelength and the Reynolds number. Through the analysis of flow past the conic shroud, the two sign laws are successfully used to summarize typical spacial distributions of vorticity in three flow regions: on and near the front cylinder surfaces, the separated shear layers and the near wake.

关键词： wavy vortex Sign law Vortex-induced vortex wake Bluff body

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Microstructures and mechanical properties of friction stir processed Mge2.0Nde0.3Zne1.0Zr magnesium alloy

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Journal of Magnesium and Alloys 2013年第2期1卷 122-127页

作者： f.Y.Zheng Y.J.wu L.M.Peng X.w.Li P.H.fu w.J.Ding National Engineering Research Center of Light Alloy Net forming Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240PR China The State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240PR China

The effect of friction stir process(fSP)parameters on the microstructure and mechanical properties of an extruded Mge2.0Nde0.3Zne1.0Zr(wt.%)alloy was investigated in this *** alloy was friction stir processed with different passes:single-pass,three-pass and five-pass,under a tool rotation rate of 800μm and a traverse speed of 200 mm min^(-1).fSP results in remarkable grain refinement of the extruded alloy(average grain size w3.8 mm as 3 passes)and almost complete dissolution of the Mg_(12)Nd phase in the *** the increase of pass,the average grain size in the stir zone(SZ)is decreased firstly and then *** Vikers hardness of SZs in all fSPed samples is higher than that of the parent material(PM).Tensile tests at room-temperature show that the tensile strengths of the stir zones along the fSP advancing direction are slightly lower than those of ***,the elongations are remarkably improved from 13.0%for PM to 24.5%for SZ fSPed with *** improved tensile properties are attributed to the microstructure refinement,dynamic recrystallization and dissolution of the Mg_(12)Nd phase.

关键词： Mg-Nd-Zn-Zr alloy friction stir processing Grain refinement Dynamic recrystallization

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Molecular beam epitaxy growth of monolayer hexagonal MnTe_(2)on Si(111)substrate

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Chinese Physics B 2021年第12期30卷 142-147页

作者： S Lu K Peng P D wang A X Chen w Ren X w.f.ng Y wu Z Y Li H f Li f Y Cheng K L Xiong J Y Yang J Z wang S A Ding Y P Jiang) L wang Q Li f S Li L f Chi Institute of functional Nano&Soft Materials(fUNSOM) Soochow UniversitySuzhou 215123China Vacuum Interconnected Nanotech workstation(Nano-X) Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of Sciences(CAS)Suzhou 215123China Key Laboratory of Polar Materials and Devices(MOE) Department of ElectronicSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China School of Physical Science and Technology Southwest UniversityChongqing 400715China School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China

Monolayer MnTe_(2)stabilized as 1 T structure has been theoretically predicted to be a two-dimensional(2 D)ferromagnetic metal and can be tuned via strain *** is no naturally van der waals(vdw)layered MnTe_(2)bulk,leaving mechanical exfoliation impossible to prepare monolayer MnTe_(2).Herein,by means of molecular beam epitaxy(MBE),we successfully prepared monolayer hexagonal MnTe_(2)on Si(111)under Te rich *** reflection high-energy electron diffraction(RHEED)and low-energy electron diffraction(LEED)patterns suggest the monolayer is atomically flat without surface *** valence state of Mn^(4+)and the atom ratio of([Te]:[Mn])further confirm the MnTe_(2)*** tunneling spectroscopy(STS)shows the hexagonal MnTe_(2)monolayer is a semiconductor with a large bandgap of~2.78 *** valence-band maximum(VBM)locates at theΓpoint,as illustrated by angle-resolved photoemission spectroscopy(ARPES),below which three hole-type bands with parabolic dispersion can be *** successful synthesis of monolayer MnTe_(2)film provides a new platform to investigate the 2D magnetism.

关键词： molecular beam epitaxy hexagonal MnTe_(2) band structure

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New ultrasound techniques for lymph node evaluation

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world Journal of Gastroenterology 2013年第30期19卷 4850-4860页

作者： Xin-wu Cui Christian Jenssen Adrian Saftoiu Andre Ignee Christoph f Dietrich Med.Klinik 2 Caritas-Krankenhaus97980 Bad MergentheimGermany Klinik für Innere Medizin Krankenhaus M rkisch Oderland15334 StrausbergGermany Department of Gastroenterology Research Center of Gastroenterology and HepatologyUniversity of Medicine and Pharmacy Craiova200349 CraiovaRomania

Conventional ultrasound(US)is the recommended imaging method for lymph node(LN)diseases with the advantages of high resolution,real time evaluation and relative low *** indications of transcutaneous ultrasound and endoscopic ultrasound include the detection and characterization of lymph nodes and the guidance for LN *** advances in US technology,such as contrast enhanced ultrasound(CEUS),contrast enhanced endoscopic ultrasound(CE-EUS),and real time elastography show potential to improve the accuracy of US for the differential diagnosis of benign and malignant lymph *** addition,CEUS and CE-EUS have been also used for the guidance of fine needle aspiration and assessment of treatment *** to size criteria,CEUS could also be used to evaluate response of tumor angiogenesis to anti-angiogenic *** this paper we review current literature regarding evaluation of lymphadenopathy by new and innovative US techniques.

关键词： Lymph nodes Ultrasound Endoscopic ultrasound Lymph node metastasis Lymphoma

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Integrated approach to colorectal anastomotic leakage: Communication, infection and healing disturbances

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world Journal of Gastroenterology 2016年第32期22卷 7226-7235页

作者： Cloe L Sparreboom Zhou-Qiao wu Jia-fu Ji Johan f Lange Department of Surgery Erasmus University Medical Center 3015 CN Rotterdam. The NEthelands Department of Gastrointestinal Surgery Peking University Cancer Hospital and Institute Haidian District Beijing 100142 China

Colorectal anastomotic leakage(CAL) remains a major complication after colorectal surgery. Despite all efforts during the last decades, the incidence of CAL has not decreased. In this review, we summarize the available strategies regarding prevention, prediction and intervention of CAL and categorize them into three categories: communication, infection and healing disturbances. These three major factors actively interact during the onset of CAL. we aim to provide an integrated approach to CAL based on its etiology. The intraoperative air leak test, intraoperative endoscopy, radiological examinations and stoma construction mainly aim to detect and to prevent communication between the intra- and extra-luminal content. Other strategies including postoperative drainage, antibiotics, and infectious-parameter evaluation are intended to detect and prevent anastomotic or peritoneal infection. Most currently available interventions for CAL focus on the control of communication and infection, while strategies targeting the healing disturbances such as lifestyle changes, oxygen therapy and evaluation of metabolic biomarkers still lack wide clinical application. This simplified categorization may contribute to an integrated understanding of CAL. we strongly believe that this integrated approach should be taken into consideration during clinical practice. An integrated approach to CAL could contribute to a better understanding of the etiology of CAL and eventually better patient outcome.

关键词： Colorectal anastomotic leakage Integrated approach Prevention Prediction Intervention

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