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Calibri 83ffff̙̙3f3fff3f3f33333f33333.HTU Delft Repositoryg >uuidrepository linktitleauthorcontributorpublication yearabstract
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departmentresearch group programmeprojectcoordinates)uuid:328249056d5e42749a4078b949c1b873Dhttp://resolver.tudelft.nl/uuid:328249056d5e42749a4078b949c1b873lParametrization of aerodynamic and canopy resistances for modeling evapotranspiration of greenhouse cucumbertYan, H. (TU Delft Water Resources; Jiangsu University); Zhang, C. (TU Delft Water Resources; Jiangsu University); Coenders, A.M.J. (TU Delft Water Resources); Acquah, Samuel Joe (Jiangsu University); Zhang, Hengnian (Jiangsu University); Wu, Haimei (Jiangsu University); Zhao, Baoshan (Jiangsu University); Huang, Song (Jiangsu University); Fu, Hanwen (Jiangsu University)Estimating the latent heat flux accurately is important to improve greenhouse crops irrigation schedules. Aerodynamic and canopy resistances, as two key parameters in the Bulk transfer equations, are already difficult to measure in the open field and even more in greenhouses. In this study, an experiment was conducted in a Venlotype cucumber greenhouse where meteorological data and the latent heat flux were measured with lysimeters. Two methods: (1) Inversing Bulk Transfer equation (IBTEmethod) and (2) Appling a convective heat transfer coefficient (CHTCmethod), were used to evaluate the aerodynamic resistance. A fixed aerodynamic resistance (= 35 s m<sup>"1</sup>) was decided by analyzing the sensitivity of heat fluxes to its changes. The reproduced sensible and latent heat flux were compared to the measured values and the good agreements between measured and estimated values were obtained. The variation of daily canopy resistance which was calculated by IBTEmethod was simulated by days after transplanting of cucumber plants and net radiation inside the greenhouse. Quadratic polynomial equations between canopy resistance and days after transplant were obtained, and were integrated into the Bulk transfer equation to predict the latent heat flux. The comparing of the measured and estimated latent heat flux showed that the Bulk transfer equation integrating the fixed aerodynamic resistance and canopy resistance submodel could be used to predict the latent heat flux of greenhouse cucumber with the index of agreement higher than 0.8.VBulk Transfer equation; Days after transplanting; Latent heat flux; Sensible Heat fluxenjournal article
20200803)uuid:8f4428d3e77e49f8bdca855e1ca4c88dDhttp://resolver.tudelft.nl/uuid:8f4428d3e77e49f8bdca855e1ca4c88dWEffects of mantle rheologies on viscous heating induced by glacial isostatic adjustmentHuang, Ping Ping (University of Hong Kong); Wu, Patrick (University of Hong Kong); van der Wal, W. (TU Delft Astrodynamics & Space Missions)It has been argued that viscous dissipation from mantle flow in response to surface loading during glacial cycles can result in shortterm heating and thus trigger transient volcanism or changes in mantle properties, which may in turn affect mantle dynamics. Furthermore, heating near the Earth's surface can also affect the stability of ice sheets. We have studied the magnitude and spatialtemporal distribution of viscous heating induced in the mantle by the realistic ice model ICE6G and gravitationally consistent ocean loads. Three types of mantle rheologies, including linear, nonlinear and composite rheologies are considered to see if nonlinear creep can induce larger viscous heating than linear rheology. We used the CoupledLaplaceFiniteElement model of Glacial Isostatic Adjustment (GIA) to compute the strain, stress and shear heating during a glacial cycle. We also investigated the upper bound of temperature change and surface heat flux change due to viscous heating. We found that maximum viscous heating occurs near the end of deglaciation near the edge of the ice sheet with amplitude as high as 120 times larger than that of the chondritic radioactive heating. The maximum heat flux < due to viscous heating can reach 30 mW m<sup>2</sup>, but the area with large heat flux is small and the timescale of heating is short. As a result, the upper bound of temperature change due to viscous heating is small. Even if 30 glacial cycles are included, the largest temperature change can be of the order of 0.3 C. Thus, viscous heating induced by GIA cannot induce volcanism and cannot significantly affect mantle material properties, mantle dynamics nor icesheet stability. The Author(s) 2017. Published by Oxford University Press. All rights reserved.\Europe; Heat generation and transport; Loading of the earth; North america; Rheology: mantleAstrodynamics & Space Missions)uuid:5909bdfd96d0458aaf10dcebf257e94bDhttp://resolver.tudelft.nl/uuid:5909bdfd96d0458aaf10dcebf257e94bhAn OnChip SelfCharacterization of a DigitaltoTime Converter by Embedding it in a FirstOrder LoopChen, Peng (University College Dublin); Huang, Xiongchuan (Broadcom); Chen, Y. (TU Delft Electronics); Wu, Lianbo (ETH Zrich); Staszewski, R.B. (University College Dublin)To characterize an onchip programmable delay in a lowcost and highresolution manner, a builtin selftest based on a firstorder &#x0394;&#x03A3; timetodigital converter with selfcalibration is proposed and implemented in TSMC 28nm CMOS. The system is selfcontained, and only one digital clock is needed for the measurements. A system selfcalibration algorithm is proposed to calibrate nonlinearities of the analog circuitry. The operation is robust over PVT variations since the delay information is normalized to the input clock period. To verify the proposed idea, two different digitaltotime converters performing the onchip delay are measured and analyzed at 50MHz clocking frequency with 0.65ps standard time deviation per measurement.buitin selfttest (BIST); Calibration; Charge pumps; Clocks; Delays; Digitaltotime converter (DTC); firstorder deltasigma modulator; Linearity; noise shaping; PLL; self calibration; Systemonchip; timetodigital converter (TDC)Electronics)uuid:c79810f324a049ccb8f0e653cfb28be2Dhttp://resolver.tudelft.nl/uuid:c79810f324a049ccb8f0e653cfb28be2pMultityped Community Discovery in TimeEvolving Heterogeneous Information Networks Based on Tensor DecompositionWu, Jibing (National University of Defense Technology); Yu, Lianfei (National University of Defense Technology; Army Academy of Border and Coastal Defense); Zhang, Qun (National University of Defense Technology); Shi, P. (TU Delft Comp Graphics & Visualisation); Liu, Lihua (National University of Defense Technology); Deng, Su (National University of Defense Technology); Huang, Hongbin (National University of Defense Technology)The heterogeneous information networks are omnipresent in realworld applications, which consist of multiple types of objects with various rich semantic meaningful links among them. Community discovery is an effective method to extract the hidden structures in networks. Usually, heterogeneous information networks are timeevolving, whose objects and links are dynamic and varying gradually. In such timeevolving heterogeneous information networks, community discovery is a challenging topic and quite more difficult than that in traditional static homogeneous information networks. In contrast to communities in traditional approaches, which only contain one type of objects and links, communities in heterogeneous information networks contain multiple types of dynamic objects and links. Recently, some studies focus on dynamic heterogeneous information networks and achieve some satisfactory results. However, they assume that heterogeneous information networks usually follow some simple schemas, such as bityped network and star network schema. In this paper, we propose a multityped community discovery method for timeevolving heterogeneous information networks with general network schemas. A tensor decomposition framework, which integrates tensor CP factorization with a temporal evolution regularization term, is designed to model the multityped c<ommunities and address their evolution. Experimental results on both synthetic and realworld datasets demonstrate the efficiency of our framework.Comp Graphics & Visualisation)uuid:e44d6c1dd44c4eebaf7bf2db6dfa6e5eDhttp://resolver.tudelft.nl/uuid:e44d6c1dd44c4eebaf7bf2db6dfa6e5e!Cavitation as a Microfluidic ToolnOhl, ClausDieter; QuintoSu, P.A.; Dijkink, R.; Conzalez, R.; Prabowo, F.; Huang, X.; Wu, T.; Venugopalen, V.resistance & propulsionconference paper.Mechanical, Maritime and Materials EngineeringMarine and Transport Technology"Ship Hydromechanics and Structures
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