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Ozcan Vieira, E. (author), Liu, Y. (author), Vroon, Jered (author), Kamphuis, Daan (author), Spagnol, S. (author)Good sleep is conducive to the recovery process of hospital patients - and yet, in many wards, sleep duration and quality can often be suboptimal, in part due to modifiable hospital-related sounds and noises. At the neurological ward of the Reinier de Graaf hospital in Delft, the Netherlands, we developed and evaluated a prototype information...conference paper 2022
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Liu, D. (author), Virgolin, Marco (author), Alderliesten, T. (author), Bosman, P.A.N. (author)Genetic programming (GP) is one of the best approaches today to discover symbolic regression models. To find models that trade off accuracy and complexity, the non-dominated sorting genetic algorithm II (NSGA-II) is widely used. Unfortunately, it has been shown that NSGA-II can be inefficient: in early generations, low-complexity models over...conference paper 2022
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Zhou, J. (author), Liu, Xuan (author), Xiong, Xuqian (author), Jia, Li (author), Lu, Jing (author), Cui, Yilin (author)Satellite-based Earth Observation systems archived a variety of vegetation products during the last 50 years, which can reveal regional to global ecosystem dynamics across diverse spatiotemporal scales. The anomaly metrics such as Vegetation Condition Index (VCI) defined by comparing the current vegetation growth condition to historical...conference paper 2022
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Ji, X. (author), van Zeijl, H.W. (author), Romijn, J. (author), van Ginkel, H.J. (author), Liu, X. (author), Zhang, Kouchi (author)The continuous trend to integrate more multi-functions in a package often involves, Heterogeneous Integration of multi-functional blocks in some kind of 3D stacking. The conventional flip chip for die-on-substrate technology applies solder for integration. However, solder joint integration has the disadvantages of restricting height, reflow...conference paper 2022
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Zhu, Songfeng (author), Li, Xueyuan (author), Qu, Xinyi (author), Liu, Qi (author), Li, Z. (author)This paper proposes a linear quadratic controller based on particle swarm algorithm for the rear wheel control of four-wheel steering vehicle. Particle swarm optimization with fitness functions is used to optimize the coefficients of the weight matrix offline. The fuzzy rules following the controller is used if the road condition is terrible....conference paper 2022
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Liu, C. (author), van Kampen, E. (author)Reinforcement learning (RL) equipped with neural networks has recently led to a wide range of successes in learning policies for unmanned aerial vehicle (UAV) navigation and control problems. The success of RL relies on two human-designed heuristics: appropriate action space definition and reward function engineering. The commonly used fully...conference paper 2022
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Wang, Zhongkai (author), Choi, Minsoo (author), Kwon, Paul (author), Lee, Kyoungtae (author), Yin, Bozhi (author), Liu, Zhaokai (author), Park, Kwanseo (author), Biswas, Ayan (author), Du, S. (author)This paper presents a complete 200Gb/s PAM-4 transmitter (TX) in 28nm CMOS technology. The transmitter features a hybrid sub-sampling PLL (SSPLL) with a delta-sigma (?S) modulator, clock distribution network with flexible timing control, and data path with a hybrid 5-tap Feed-Forward Equalizer (FFE) and T-coil for bandwidth extension. The...conference paper 2022
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Arcondoulis, Elias J. G. (author), Liu, Yu (author), Yang, Yannian (author), Ragni, D. (author), Rubio Carpio, A. (author), Avallone, F. (author)The application of a porous coating to a cylinder can significantly reduce the vortex shedding tone when placed in a uniform flow. The mechanism of how this porous media attenuates vortex shedding has been studied more in recent years yet it is still not fully understood. Typical porous materials within a certain range of porosity and airflow...conference paper 2022
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Liu, Qilong (author), Breems, Lucien (author), Zhang, Chenming (author), Bajoria, Shagun (author), Bolatkale, M. (author), Rutten, Robert (author), Radulov, Georgi (author)In the pursuit of ever larger bandwidths, in recent years GHz-rate continuous-time (CT) oversampled ADCs have been reported in literature that achieve bandwidths of hundreds of MHz and have even exceeded the GHz barrier [1]-[3]. As impressive as these bandwidths are for CT ADCs, the required ADC architectures are complex, are sensitive to...conference paper 2022
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Li, Z. (author), Lin, Yunlong (author), Cheng, Gong (author), Wang, X. (author), Liu, Qi (author), Gong, Jianwei (author), Lu, Chao (author)Precisely modeling interactions and accurately predicting trajectories of surrounding vehicles are essential to the decision-making and path-planning of intelligent vehicles. This paper proposes a novel framework based on ensemble learning to improve the performance of trajectory predictions in interactive scenarios. The framework is termed...conference paper 2022
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Liu, L. (author), Lekić, A. (author), Popov, M. (author)Due to its excellent performance, VSC-based high voltage direct current (HVDC) power systems draw significant attention. They are being heavily used in modern industrial applications, such as onshore and offshore wind farms, and for interconnection between asynchronous networks. However, the traditional proportional-integral (PI) control...conference paper 2022
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Liu, Zhengqiang (author), Liu, Di (author), Yu, Wenwu (author), Baldi, S. (author)In recent years, platooning solutions like cooperative adaptive cruise control (CACC) have been deeply studied. It is common in such platooning literature to assume that the vehicles drive on the same lane (longitudinal platooning). At the same time, lateral control during merging maneuvers is commonly addressed as a path planning problem, in...conference paper 2022
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Han, Rui (author), Wen, Shilin (author), Liu, Chi Harold (author), Yuan, Ye (author), Wang, Guoren (author), Chen, Lydia Y. (author)Edge-cloud jobs are rapidly prevailing in many application domains, posing the challenge of using both resource-strenuous edge devices and elastic cloud resources. Efficient resource allocation on such jobs via scheduling algorithms is essential to guarantee their performance, e.g. latency. Deep reinforcement learning (DRL) is increasingly...conference paper 2022
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Wang, Xinyue (author), Zeng, Zejun (author), Zhang, Jing (author), Zhang, Kouchi (author), Liu, Pan (author)With the increasing application of wide bandgap materials such as silicon carbide and gallium nitride in power devices, the working temperature of power devices has been pushed further. Therefore, it brings higher requirements for packaging materials. Sintered silver is a widely accepted chip connection material. However, silver suffers from...conference paper 2022
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Xu, Jingyi (author), Li, Z. (author), Gao, Li (author), Ma, Junyi (author), Liu, Qi (author), Zhao, Yanan (author)The deep reinforcement learning-based energy management strategies (EMS) have become a promising solution for hybrid electric vehicles (HEVs). When driving cycles are changed, the neural network will be retrained, which is a time-consuming and laborious task. A more efficient way of choosing EMS is to combine deep reinforcement learning (DRL)...conference paper 2022
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Li, Shizhen (author), Liu, X. (author), Fan, Jiajie (author), Tan, C. (author), Wang, S. (author), Xie, Bin (author), Ye, H. (author)The wide-bandgap semiconductors represented by GaN have a broad application prospect because of their high service temperature and high switch frequency. Quad-Flat-No-Lead (QFN) Package is currently one of the mainstream packaging methods due to its low cost and high efficiency. However, the low reliability of QFN used in GaN devices is still...conference paper 2022
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Shetgaonkar, A.D. (author), Liu, Siyuan (author), Popov, M. (author)Direct current circuit breaker (DC CB) is the key component to provide reliable operation of Multi-terminal Direct Current (MTDC) system. Fast, effective and accurate DC CB models are needed for system-level studies. Due to large number of components in the DC CB, its detailed modeling is needed in order to simulate current interruption process...conference paper 2022
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Geng, Xin (author), Hu, Tianxiang (author), Liu, Peiqing (author), Sinnige, T. (author), Eitelberg, G. (author)The increasing demand for short-range passenger air transport and the strong push for aircraft with electric propulsion has renewed research interest in propellers. Despite the unmatched aerodynamic efficiency of propellers, their relatively high noise emissions limit widespread application on aircraft. Previous research has not systematically...conference paper 2021
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Gómez Pérez, P. (author), Liu, Y. (author), Cowan, K.J. (author)In this work, we propose a new method to approximate the cost function of Low-Thrust, Multiple-Gravity-Assist interplanetary trajectories using a Machine Learning surrogate. We identified the computation time required to obtain training data as the main limitation when using Machine Learning methods for this purpose so we present a strategy to...conference paper 2021
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Liu, Zhenyu (author), Fu, Runnan (author), Wang, Linjun (author), Jin, Yuzhen (author), Papakostas, Theodoros (author), Mainelli, Xenia Una (author), Voûte, R.L. (author), Verbree, E. (author)Because unknown interior layouts can have serious consequences in time-sensitive situations, crisis response teams request many potential solutions for visualizing indoor environments in crisis scenarios. This research uses a game engine to directly visualize point cloud data input of indoor environments for generating clear interaction between...conference paper 2021