Searched for: author%3A%22Xu%2C+L.%22
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Li, T. (author), Xu, L. (author), Erkin, Z. (author), Lagendijk, R.L. (author)
With the fast development of e-commerce, there is a higher demand for timely delivery. Logistic companies want to send receivers a more accurate arrival prediction to improve customer satisfaction and lower customer retention costs. One approach is to share (near) real-time location data with recipients, but this also introduces privacy and...
conference paper 2024
document
Guerra-Santin, O. (author), Xu, L. (author), Boess, S.U. (author), van Beek, E. (author)
Renovation projects in social housing tend to focus on diminishing the costs of the renovation. An affordable solution is sought for an average household, thus assumptions are made about the residents' behaviour when calculating the energy performance of the dwellings. However, households have different needs and preferences, and therefore...
journal article 2022
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Xu, L. (author), Guerra-Santin, O. (author), Boess, S.U. (author)
As the goal-setting in the European Green Deal is to reach carbon neutrality by 2050, great efforts have been put to improve the energy efficiency in residential buildings. As residential buildings are towards high energy efficiency, building envelopes are becoming better thermally insulated and systems are becoming more energy-efficient....
journal article 2022
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Xu, L. (author), Guo, Fang (author), Hoes, Pieter-Jan (author), Yang, Xudong (author), Hensen, Jan (author)
This paper presents a modeling and simulation method that supports energy performance assessment and operation strategy investigation of borehole thermal energy storage in the Chifeng district heating (DH) system. A living laboratory in Chifeng, China that integrates a 0.5 million m3 borehole thermal energy storage system, an on-site solar...
journal article 2021
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Xu, L. (author)
This thesis describes the design and implementation of integrated high-side current sensors for IoT applications. As explained in chapter 1, the main challenges are the need to achieve low power, low cost and low area while maintaining a reasonably low gain error. To meet them, the focus of this thesis is on (1) the design of precision HV...
doctoral thesis 2020
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Xu, L. (author), Lu, T. (author)
A straightforward and practical method of frequency-domain analysis is developed for coupled vehicle-track system. The influence of the track flexibility and spatial coherence of irregularities on frequency response of vehicle-track systems are systematically studied<br/>accounting for train velocity and irregularity wavelength. Calculations...
journal article 2020
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Xu, L. (author), Zhai, Wanming (author), Li, Z. (author)
Due to random characteristics of system parameters and excitations, the dynamic assessment and prediction for the train-track-bridge interaction systems become rather complex issues needing to be addressed, especially considering the longitudinal inhomogeneity and uncertainty of dynamic properties in physics and correspondingly their temporal...
journal article 2018
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Xu, L. (author), Heidary Shalmany, S. (author), Huijsing, J.H. (author), Makinwa, K.A.A. (author)
This letter presents the most accurate shunt-based high-side current sensor ever reported. It achieves a 25 V input common-mode range from a single 1.8-V supply by using a beyond-the-rails ADC. A hybrid analog/digital temperature compensation scheme is proposed to simplify the circuit implementation while maintaining the state-of-the-art...
journal article 2018
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Han, Meiling (author), de Jong, W.M. (author), Cui, Zhuqing (author), Xu, L. (author), Lu, H. (author), Sun, Baiqing (author)
The past decade has seen a surge in the use of city branding, which is used to attract specific target groups of investors, high-tech green firms and talented workforce and reflects a desired shift from old, polluting manufacturing industries to new, clean service industries. Previous studies in the Chinese mega-city regions Pearl River Delta...
journal article 2018
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Xu, L. (author), Huijsing, J.H. (author), Makinwa, K.A.A. (author)
This paper presents a fully integrated ±4A current sensor that supports a 25V input common-mode voltage range (CMVR) while operating from a single 1.5V supply. It consists of an on-chip metal shunt, a beyond-the-rails ADC [1] and a temperature-dependent voltage reference. The beyond-the-rails ADC facilitates high-side current sensing without...
conference paper 2018
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Xu, L. (author), Huijsing, J.H. (author), Makinwa, K.A.A. (author)
This paper presents a fully integrated shunt-based current sensor that supports a 25-V input common-mode range while operating from a single 1.5-V supply. It uses a highvoltage beyond-the-rails ADC to directly digitize the voltage across an on-chip shunt resistor. To compensate for the shunt’s large temperature coefficient of resistance (∼0.335%...
journal article 2018
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Xu, L. (author), Zhai, Wan Ming (author)
To efficiently select track irregularity random samples for satisfying the ergodicity requirements of excitation sources in stochastic dynamics and reliability analysis in vehicle-track system, the weak-stationarity and similarity spectral of track irregularities were introduced to propose a track irregularity probabilistic model. Using the...
journal article 2018
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Xu, L. (author), Xiao, Y (author), Xu, Q (author), Song, Qiushi (author), Yang, Y. (author)
In this work, the electrochemical behavior of zirconium was studied on an inert molybdenum electrode at 550 °C in a LiCl-KCl-K<sub>2</sub>ZrF<sub>6</sub> molten salt system, which is considered as an ideal electrolyte for the zirconium electrorefining process. Several transient electrochemical techniques were used such as cyclic voltammetry,...
journal article 2017
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Xu, L. (author)
This research focuses on the stability of three metastable ? titanium alloys – Ti-10V-1Fe-3Al (Ti-1013), Ti-10V-2Cr-3Al (Ti-102Cr3) and Ti-10V-2Fe-3Al-B (Ti-1023B). In the first stage of the work, new ?+(?+?) heat treatment schemes were designed on the basis of Thermo-Calc® simulations and previous research work and carried out to such an extent...
master thesis 2015
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