Searched for: author:"Sun, Y."
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Sun, Y. (author), Riva, R.E.M. (author), Ditmar, P.G. (author), Rietbroek, Roelof (author)
We present a new approach to estimate time variations in J2. Those variations are represented as the sum of contributions from individual sources. This approach uses solely Gravity Recovery And Climate Experiment (GRACE) data and the geoid fingerprints of mass redistributions that take place both at the surface and in the interior of the solid...
journal article 2019
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Sun, Y. (author), Kang, Xuanwu (author), Zheng, Yingkui (author), Lu, Jiang (author), Tian, Xiaoli (author), Wei, Ke (author), Wu, Hao (author), Wang, Wenbo (author), Liu, Xinyu (author), Zhang, G.Q. (author)
Gallium nitride (GaN)-based vertical power Schottky barrier diode (SBD) has demonstrated outstanding features in high-frequency and high-power applications. This paper reviews recent progress on GaN-based vertical power SBDs, including the following sections. First, the benchmark for GaN vertical SBDs with different substrates (Si, sapphire, and...
review 2019
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Zhang, Hongyue (author), Sun, Y. (author)
Annual cycles in the geocenter motion time series are primarily driven by mass changes in the Earth’s hydrologic system, which includes land hydrology, atmosphere, and oceans. Seasonal variations of the geocenter motion have been reliably determined according to Sun et al. (J Geophys Res Solid Earth 121(11):8352–8370, 2016) by combining the...
journal article 2018
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Martinec, Z (author), Klemann, V (author), van der Wal, W. (author), Riva, R.E.M. (author), Spada, G (author), Sun, Y. (author), Melini, Daniele (author), Kachuck, S. B. (author), Barletta, V (author), Simon, K.M. (author), More Authors (author)
The ocean load in glacial isostatic adjustment (GIA) modelling is represented by the so-called sea level equation (SLE). The SLE describes the mass redistribution of water between ice sheets and oceans on a deforming Earth. Despite various teams independently investigating GIA, there has been no systematic intercomparison among the numerical...
journal article 2018
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Sun, Y. (author), Schwake, G. (author), Zhu, K. (author), Zhu, P. (author)
journal article 2018
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Sun, Y. (author), Riva, R.E.M. (author), Ditmar, P.G. (author), Klees, R. (author)
With the launch of the Gravity Recovery and Climate Experiment (GRACE) satellite mission in 2002 (http://www.csr.utexas.edu/grace), Satellite Gravimetry has become a unique tool to estimate hydrological water balance and mass balance of ice sheets, as well as to monitor mass re-distribution in the oceans and the solid Earth. However, satellite...
poster 2018
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Sun, Y. (author), Hein, C.M. (author), Song, Kun (author), Feng, Lin (author)
Tianjin, one of the so-called Treaty Ports that opened to foreign trade under the unequal treaties was home to nine foreign concessions. In each concession, the foreign powers created urban forms and functions that mirrored practices in their respective home countries. This article explores the consecutive establishment and implementation of...
conference paper 2018
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Ditmar, P.G. (author), Brussee, M. (author), Sun, Y. (author), Riva, R.E.M. (author)
other 2018
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Sun, Y. (author), Hein, C.M. (author), Song, Kun (author)
European, American, and Japanese debates on public housing served as models for those in modern China, and Chinese scholars and professionals, with the support of the KMT (Kuomintang), developed public housing as a sign of innovation in both societal reform and building typology. Using the under-researched case of Tianjin's public housing...
journal article 2017
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Sun, Y. (author)
Geocenter motion and changes in the Earth’s dynamic oblateness (J2) are of great importance in many applications. Among others, they are critical indicators of largescale mass redistributions, which is invaluable to understand ongoing global climate change. The revolutionary Gravity Recovery and Climate Experiment (GRACE) satellite mission...
doctoral thesis 2017
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Sun, Y. (author), Ditmar, P.G. (author), Riva, R.E.M. (author)
In this study, we develop a methodology to estimate monthly variations in degree-1 andC<sub>20</sub> coefficients by combing Gravity Recovery and Climate Experiment (GRACE) data withoceanic mass anomalies (combination approach).With respect to the method by Swenson et al.,the proposed approach exploits noise covariance information of both...
journal article 2017
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Riddell, Anna R. (author), King, A. Matt (author), Watson, Christopher S. (author), Sun, Y. (author), Riva, R.E.M. (author), Rietbroek, Roelof (author)
Uncertainty in the geocenter position and its subsequent motion affects positioning estimates on the surface of the Earth and downstream products such as site velocities, particularly the vertical component. The current version of the International Terrestrial Reference Frame, ITRF2014, derives its origin as the long-term averaged center of...
journal article 2017
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Tangdamrongsub, N. (author), Steele-Dunne, S.C. (author), Gunter, B.C. (author), Ditmar, P.G. (author), Sutanudjaja, Edwin H. (author), Sun, Y. (author), Xia, Ting (author), Wang, Zhongjing (author)
An accurate estimation of water resources dynamics is crucial for proper management of both agriculture and the local ecology, particularly in semi-arid regions. Imperfections in model physics, uncertainties in model land parameters and meteorological data, as well as the human impact on land changes often limit the accuracy of hydrological...
journal article 2017
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Hashemi Farahani, H. (author), Ditmar, P.G. (author), Miragaia Gomes Inacio, P. (author), Didova, Olga (author), Gunter, B.C. (author), Klees, R. (author), Guo, X. (author), Guo, Jing (author), Sun, Y. (author), Liu, Xianglin (author), Zhao, Qile (author), Riva, R.E.M. (author)
We present a high resolution model of the linear trend in the Earth’s mass variations based on DMT-2 (Delft Mass Transport model, release 2). DMT-2 was produced primarily from K-Band Ranging (KBR) data of the Gravity Recovery And Climate Experiment (GRACE). It comprises a time series of monthly solutions complete to spherical harmonic degree 120...
journal article 2017
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Yao, L. (author), Sun, Y. (author), Zhao, M (author), Alderliesten, R.C. (author), Benedictus, R. (author)
This paper aims to investigate stress ratio effect on fibre bridging significance in mode I fatigue delamination growth of composite materials. Fatigue resistance curves (R-curves) of different stress ratios are determined and compared with the quasi-static R-curve. The fatigue R-curve of a high stress ratio is similar to the quasi-static...
journal article 2017
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Yao, L. (author), Sun, Y. (author), Alderliesten, R.C. (author), Benedictus, R. (author), Zhao, M (author)
Fibre bridging can significantly enhance delamination resistance making the use of a single Paris resistance curve to determine fatigue crack growth insufficient. An empirical Paris-type relation has been developed in a previous study to take fibre bridging into account in fatigue delamination growth. This relation was developed by correlating...
journal article 2017
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Zhang, A. (author), Bokel, R.M.J. (author), van den Dobbelsteen, A.A.J.F. (author), Sun, Y. (author), Huang, Q (author), Zhang, Qi (author)
This paper discusses the role of geometry parameters including building shape, window to wall ratio, room depth, and orientation on the energy use and thermal comfort of school buildings in cold climates of China. The annual total energy demand and summer thermal discomfort time were compared through computer simulations with DesignBuilder....
journal article 2017
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Zhang, A. (author), Sun, Y. (author), Huang, Qiong (author), Bokel, R.M.J. (author), van den Dobbelsteen, A.A.J.F. (author)
This paper discusses the energy impact of corridor design for school buildings in the cold climate of China. Local school buildings were classified into three types in terms of the corridor design patterns. Architectural related parameters of corridors which could have a potential impact on the energy consumption were summarized and discussed,...
conference paper 2017
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Yang, D. (author), Sun, Y (author), Di Stefano, D. (author), Turrin, M. (author), Sariyildiz, I.S. (author)
Surrogate-based Optimization is a useful approach when the objective function is computationally expensive to evaluate, compared to Simulation-based Optimization. In the surrogate-based method, analytically tractable “surrogate models” (also known as “Response Surface Models — RSMs” or “metamodels”), are constructed and validated for each...
conference paper 2016
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Sun, Y. (author), Riva, R.E.M. (author), Ditmar, P.G. (author)
The focus of the study is optimizing the technique for estimating geocenter motion and variations in J2 by combining data from the Gravity Recovery and Climate Experiment (GRACE) satellite mission with output from an Ocean Bottom Pressure model and a Glacial Isostatic Adjustment (GIA) model. First, we conduct an end-to-end numerical simulation...
journal article 2016
Searched for: author:"Sun, Y."
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