- document
-
Li, Y. (author), Han, Qinglin (author), Zhang, Guangjun (author), Horvath, I. (author)Robotic wire and arc additive manufacturing (WAAM) systems are required to provide predictable and efficient operations to fabricate solid metallic parts with high morphological fidelity and geometric accuracy. Since the metallic parts are fabricated based on a layer-by-layer principle, the interactions between the neighboring beads and...journal article 2018
- document
-
Han, J. (author), Zhang, Lingling (author), Zhang, Qunfei (author), Leus, G.J.T. (author)Differential orthogonal frequency division multiplexing (OFDM) is practically attractive for underwater acoustic communications since it has the potential to obviate channel estimation. However, similar to coherent OFDM, it may suffer from severe inter-carrier interference over time-varying channels. To alleviate the induced performance...journal article 2018
- document
-
Ma, X. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author), Han, Ningxu (author), Xing, Feng (author)External sulfate attack is a progressive degradation process that may cause expansion, cracking, loss of binder cohesion and increased permeability in cementitious materials. Crystallization pressure theory has often been referred to as the most likely mechanism. However, thus far the stress causing the expansion has not been quantified. In...journal article 2018
- document
-
Chen, Junwen (author), Liu, Zhigang (author), Wang, H. (author), Nunez, Alfredo (author), Han, Zhiwei (author)The excitation and vibration triggered by the long-term operation of railway vehicles inevitably result in defective states of catenary support devices. With the massive construction of high-speed electrified railways, automatic defect detection of diverse and plentiful fasteners on the catenary support device is of great significance for...journal article 2018
- document
-
Han, Y. (author), Hegyi, A. (author), Yuan, Y. (author), Roncoli, Claudio (author), Hoogendoorn, S.P. (author)This paper extends an existing linear quadratic model predictive control (LQMPC) approach to multi-destination traffic networks, where the correct origin-destination (OD) relations are preserved. In the literature, the LQMPC approach has been presented for efficient routing and intersection signal control. The optimization problem in the...journal article 2018
- document
-
Han, Y. (author)Traffic congestion has become a global issue that has a significant impact on our societys productivity. Its negative effects not only lie in the travel delays and unsafe conditions that it brings to road users, but also many aspects of our lives such as the air we all breathe. Construction and traffic management are typical alternatives for...doctoral thesis 2017
- document
-
Prisacaru, Alexandru (author), Palczynska, Alicja (author), Gromala, Przemyslaw Jakub (author), Han, Bongtae (author), Zhang, Kouchi (author)Recent advancements in automotive technologies, most notably autonomous driving, demand electronic systemsmuch more complex than realized in the past. The automotiveindustry has been forced to adopt advanced consumerelectronics to satisfy the demand, and thus it becomes morechallenging to assess system reliability while adopting the...conference paper 2017
- document
-
Han, Y. (author), Hegyi, A. (author), Yuan, Y. (author), Hoogendoorn, S.P. (author), Papageorgiou, Markos (author), Roncoli, Claudio (author)In this paper we develop a fast model predictive control (MPC) approach for variable speed limit coordination to resolve freeway jam waves. Existing MPC approaches that are based on the second-order traffic flow models suffer from high computation load due to the non-linear and non-convex optimization formulation. In recent years, simplified...journal article 2017
- document
-
Wang, Y. (author), Wang, Jie (author), Yuan, Z. (author), Han, Haoya (author), Li, Tao (author), Li, Li (author), Guo, Xuhong (author)Chitosan has been used to cross-link poly(acrylic acid) to give three pH-sensitive hydrogels designed to control the release of the drugs amoxicillin and meloxicam. The extent of cross-linking and solution pH was found to dominate the swelling behavior of these hydrogels as shown by scanning electron microscopy and swelling time dependencies....journal article 2017
- document
-
Ohlsson, Jens (author), Han, Shengnan (author), Bouwman, W.A.G.A. (author)Purpose: The purpose of this paper is to demonstrate and evaluate the prioritization and categorization method (PCM), which facilitates the active participation of process stakeholders (managers, owners, customers) in process assessments. Stakeholders evaluate processes in terms of effectiveness, efficiency and relevance against certain...journal article 2017
- document
-
Prisacaru, Alexandru (author), Gromala, Przemyslaw Jakub (author), Jeromio, Mateus Bagetti (author), Han, Bongtae (author), Zhang, Kouchi (author)Miniaturization of electronics, reduction of time to market and new functionalities in the current context of autonomous driving, electrification and connectivity, are bringing new reliability challenges. Prognostics and Health Management (PHM) can be used effectively to address some of the key challenges, in particular new challenges...conference paper 2017
- document
-
Han, Haoya (author), Li, Li (author), Tian, Yuchuan (author), Wang, Yunwei (author), Ye, Zhishuang (author), Yang, Qingsong (author), Wang, Y. (author), Von Klitzing, Regine (author), Guo, Xuhong (author)Hollow silica nanoparticles were prepared through generating a silica layer in spherical polyelectrolyte nanogels (SPN), which consisted of a solid core of polystyrene (PS) and a shell of crosslinked poly(acrylic acid) (PAA), followed by removing the PS core via solvent dissolution. Small angle X-ray scattering (SAXS) in combination with TEM...journal article 2017
- document
-
Nijzink, R.C. (author), Hutton, Christopher (author), Pechlivanidis, Ilias (author), Capell, René (author), Arheimer, Berit (author), Freer, Jim (author), Han, Dawei (author), Wagener, Thorsten (author), McGuire, Kevin (author), Savenije, Hubert (author), Hrachowitz, M. (author)The core component of many hydrological systems, the moisture storage capacity available to vegetation, is impossible to observe directly at the catchment scale and is typically treated as a calibration parameter or obtained from a priori available soil characteristics combined with estimates of rooting depth. Often this parameter is...journal article 2016
- document
-
Fu, Dejian (author), Bowman, Kevin W. (author), Worden, Helen M. (author), Natraj, Vijay (author), Worden, John R. (author), Yu, Shanshan (author), Veefkind, j. Pepijn (author), Aben, Ilse (author), Landgraf, Jochen (author), Strow, Larrabee (author), Han, Yong (author)The Measurements of Pollution in the Troposphere (MOPITT) instrument is the only satellite-borne sensor in operation that uses both thermal (TIR) and nearinfrared (NIR) channels to estimate CO profiles. With more than 15 years (2000 to present) of validated multispectral observations, MOPITT provides the unique capability to separate CO in...journal article 2016
- document
-
Han, Y. (author), Yuan, Y. (author), Hegyi, A. (author), Hoogendoorn, S.P. (author)This paper proposes an extension of the discrete Lighthill–Whitham–Richards model of the cell transmission model type to reproduce capacity drop and the propagation of jam waves. Recent studies have tried to incorporate the capacity drop into discrete first-order traffic flow models for traffic optimization purposes. It was found that the inflow...journal article 2016
- document
-
Vasudevan, R.A. (author), Thanawala, Zaid (author), Han, L. (author), Tan, H. (author), Buijs, Thom (author), Deligiannis, D. (author), Perez Rodriguez, P. (author), Digdaya, I.A. (author), Smith, W.A. (author), Zeman, M. (author), Smets, A.H.M. (author)A hybrid tandem solar cell consisting of a thin-film, nanocrystalline silicon top junction and a siliconheterojunction bottom junction is proposed as a supporting solar cell for photoelectrochemical applications.Tunneling recombination junction engineering is shown to be an important consideration indesigning this type of solar cell. The best...journal article 2016
- document
-
Ma, X. (author), Copuroglu, Oguzhan (author), Schlangen, E. (author), Han, N (author), Xing, F (author)External sulfate attack is one of the situations that may cause gradual but severe damage in cementitious materials, which may lead to cracking, increased permeability and strength loss. In this paper, thin-walled hollow cement paste cylinders with a wall thickness of 2.5mm were made considering the slow penetration process of sulfate ions under...conference paper 2016
- document
-
Xiong, W. (author), Tang, J. (author), Zhu, G. (author), Han, N. (author), Schlangen, E. (author), Dong, B. (author), Wang, X. (author), Xing, F. (author)Steel is prone to corrosion induced by chloride ions, which is a serious threat to reinforced concrete structures, especially in marine environments. In this work, we report a novel capsule-based selfrecovery system that utilizes chloride ions as a trigger. These capsules, which are functionalized via a smart response to chloride ions, are...journal article 2015
- document
-
Han, L. (author), Zeman, M. (author), Smets, A.H.M. (author)The growth mechanism of silicon nanocrystals (Si NCs) synthesized at a high rate by means of expanding thermal plasma chemical vapor deposition technique are studied in this letter. A bimodal Gaussian size distribution is revealed from the high-resolution transmission electron microscopy images, and routes to reduce the unwanted large Si NCs are...journal article 2015
- document
-
Han, L. (author), Zeman, M. (author), Smets, A.H.M. (author)This paper demonstrates that free-standing silicon nanocrystals (Si NCs) have significantly different thermal conductivity properties compared to Si NCs embedded in a host matrix. The temperatures of Si NCs under laser illumination have been determined by measuring the ratio of the Anti-Stokes to Stokes intensities of the first order Si–Si...journal article 2015