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Dynamic plasmonic beam shaping by vector beams with arbitrary locally linear polarization states

Man, Z. (author), Du, L. (author), Min, C. (author), Zhang, Y. (author), Zhang, C. (author), Zhu, S. (author), Urbach, H.P. (author), Yuan, X.C. (author)

Vector beams, which have space-variant state of polarization (SOP) comparing with scalar beams with spatially homogeneous SOP, are used to manipulate surface plasmon polarizations (SPPs). We find that the excitation, orientation, and distribution of the focused SPPs excited in a high numerical aperture microscopic configuration highly depend on...

journal article 2014

document

Multi-level Indoor Path Planning Method

Xiong, Q. (author), Zhu, Q. (author), Zlatanova, S. (author), Du, Z. (author), Zhang, Y. (author), Zeng, L. (author)

Indoor navigation is increasingly widespread in complex indoor environments, and indoor path planning is the most important part of indoor navigation. Path planning generally refers to finding the most suitable path connecting two locations, while avoiding collision with obstacles. However, it is a fundamental problem, especially for 3D complex...

conference paper 2015

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Free multi-floor indoor space extraction from complex 3D building models

Xiong, Qing (author), Zhu, Qing (author), Du, Zhiqiang (author), Zlatanova, S. (author), Zhang, Yeting (author), Zhou, Yan (author), Li, Yun (author)

Intelligent navigation and facility management in complex indoor environments are issues at the forefront of geospatial information science. Indoor spaces with fine geometric and semantic descriptions provide a solid foundation for various indoor applications, but it is difficult to comprehensively extract free multi-floor indoor spaces from...

journal article 2016

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Dual-action smart coatings with a self-healing superhydrophobic surface and anti-corrosion properties

Qian, Hongchang (author), Xu, Dake (author), Du, Cuiwei (author), Zhang, Dawei (author), Li, Xiaogang (author), Huang, Luyao (author), Deng, Leping (author), Tu, Yunchao (author), Mol, J.M.C. (author), Terryn, H.A. (author)

This work introduces a new self-healing superhydrophobic coating based on dual actions by the corrosion inhibitor benzotriazole (BTA) and an epoxy-based shape memory polymer (SMP). Damage to the surface morphology (e.g., crushed areas and scratches) and the corresponding superhydrophobicity are shown to be rapidly healed through a simple heat...

journal article 2017

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Residents' willingness to participate in green infrastructure: Spatial differences and influence factors in Shanghai, China

Yu, Yang (author), Xu, Hui (author), Wang, Xiaohan (author), Wen, Jiahong (author), Du, Shiqiang (author), Zhang, Min (author), Ke, Q. (author)

Green infrastructure (GI) plays a fundamental role in achieving urban pluvial flood management, mitigating urban heat island effect, and improving living suitability. Residents' participation is the main driving force of GI implementation. Based on semi-structured interviews, GIS spatial analysis, and multiple regression, we investigated...

journal article 2019

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Scenario-based extreme flood risk of residential buildings and household properties in Shanghai

Shan, Xinmeng (author), Wen, Jiahong (author), Zhang, Min (author), Wang, Luyang (author), Ke, Q. (author), Li, Weijiang (author), Du, Shiqiang (author), Shi, Yong (author), Chen, Kun (author)

Extreme flooding usually causes huge losses of residential buildings and household properties, which is critical to flood risk analysis and flood resilience building in Shanghai. We developed a scenario-based multidisciplinary approach to analyze the exposure, losses and risks of residential buildings and household properties, and their...

journal article 2019

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Hard or soft flood adaptation? Advantages of a hybrid strategy for Shanghai

Du, Shiqiang (author), Scussolini, Paolo (author), Ward, Philip J. (author), Zhang, Min (author), Wen, Jiahong (author), Wang, Luyang (author), Koks, Elco (author), Diaz-Loaiza, Andres (author), Gao, Jun (author), Ke, Q. (author), Aerts, Jeroen C.J.H. (author)

Flood risk is expected to increase in coastal cities, particularly in Asian megacities such as Shanghai. This paper presents an integrated modeling framework to simulate changes in the flood risk in Shanghai and provide a cost-benefit analysis of multiple adaptation strategies used to reduce risk. The results show that the potential flood...

journal article 2020

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基于Lambert-Beer理论与人工神经网络的混合荧光粉发射光谱预测

Cao, Yixing (author), Chen, Shanghuan (author), Li, Yutong (author), Du, Yunjia (author), Chen, Wei (author), Fan, J. (author), Zhang, Kouchi (author)

The emission spectra of high color rendering phosphors, mixed with the yttrium aluminium garnet, silicon based oxynitride and nitride based phosphors, were predicted by the Lambert-Beer theory and back propagation neural network (BP NN). Firstly, the modified Lambert-Beer model was used to calculate the proportional coefficient of the...

journal article 2021

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Ca-modified Al–Mg–Sc alloy with high strength at elevated temperatures due to a hierarchical microstructure

Du, Haiquan (author), Zhang, Shasha (author), Zhang, Bingyi (author), Tao, Xuewei (author), Yao, Zhengjun (author), Belov, Nikolay (author), van der Zwaag, S. (author), Liu, Zili (author)

Al-Mg alloys are normally prone to lose part of their yield and tensile strength at high temperatures due to insufficient thermal stability of the microstructure. Here, we present a Ca-modified Al–Mg–Sc alloy demonstrating high strength at elevated temperatures. The microstructure contains Al₄Ca phases distributed as a network...

journal article 2021

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Recent advances in hot tearing during casting of aluminium alloys

Li, Yue (author), Li, Hongxiang (author), Katgerman, L. (author), Du, Qiang (author), Zhang, Jishan (author), Zhuang, Linzhong (author)

Hot tearing is one of the most severe and irreversible casting defects for many metallic materials. In 2004, Eskin et al. published a review paper in which the development of hot tearing of aluminium alloys was evaluated (Eskin and Suyitno, 2004). Sixteen years have passed and this domain has undergone considerable development. Nevertheless,...

review 2021

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Secure Logistic Regression for Vertical Federated Learning

He, Daojing (author), Du, Runmeng (author), Zhu, Shanshan (author), Zhang, Min (author), Liang, K. (author), Chan, Sammy (author)

Data island effectively blocks the practical application of machine learning. To meet this challenge, a new framework known as federated learning was created. It allows model training on a large amount of scattered data owned by different data providers. This article presents a parallel solution for computing logistic regression based on...

journal article 2022

document

A Crystal-Less Clock Generation Technique for Battery-Free Wireless Systems

Chang, Ziyi (author), Zhang, Yunshan (author), Yang, Changgui (author), Luo, Yuxuan (author), Du, S. (author), Chen, Yong (author), Zhao, Bo (author)

The size of wireless systems is required to be reduced in many applications, such as ultra-low-power sensor nodes and wearable/implantable devices, where battery and crystal are the two main bottlenecks in system miniaturization. In recent years, battery-free radios based on wireless power transfer (WPT) have shown great potential in...

journal article 2022

document

Collision prevention of ship towing operation under environmental disturbance

Zhang, Lei (author), Du, Zhe (author), Valdez Banda, Osiris A. (author), Goerlandt, F.M.B. (author), Du, Lei (author), Li, Xiaobin (author)

Towing operations are highly reliant on the experience of the towing operators. Safety concerns arise when towing operations are subjected to environmental disturbances and dynamic traffic conditions. However, a systematic framework and approaches to enhance the safety and automation of towing operations remain lacking. This work proposes a...

journal article 2022

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Flexible Collision-free Platooning Method for Unmanned Surface Vehicle with Experimental Validations

Du, B. (author), Lin, Bin (author), Xie, Wei (author), Zhang, Weidong (author), Negenborn, R.R. (author), Pang, Y. (author)

This paper addresses the flexible formation problem for unmanned surface vehicles in the presence of obstacles. Building upon the leader-follower formation scheme, a hybrid line-of-sight based flexible platooning method is proposed for follower vehicle to keep tracking the leader ship. A fusion artificial potential field collision avoidance...

conference paper 2022

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Luminous performances characterization of YAG: Ce3+ phosphor/silicone composites using both reflective and transmissive laser excitations

Cao, Yixing (author), Chen, Wei (author), Du, Yunjia (author), Qi, Gaojin (author), Santos, Thebano (author), Zhang, Kouchi (author), Fan, J. (author)

YAG: Ce3+ phosphor/silicone composites are widely used in solid-state lighting as a light converter to achieve white lighting. However, because of high thermal resistance and low thermal stability, the luminous performance of YAG: Ce3+ phosphor/silicone composite deteriorates rapidly when excited by high-power-density blue-laser. To explore...

journal article 2022

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A 2m-Range 711uW Body Channel Communication Transceiver Featuring Dynamically-Sampling Bias-Free Interface Front End

Gu, Guanjie (author), Yang, Changgui (author), Li, Zhuhao (author), Feng, Xiangdong (author), Chang, Ziyi (author), Wang, Ting-Hsun (author), Zhang, Yunshan (author), Luo, Yuxuan (author), Zhang, Hong (author), Wang, Ping (author), Du, S. (author), Chen, Yong (author), Zhao, Bo (author)

Body Channel Communication (BCC) offers a low-loss signal transmission medium for ultra-low-power wearable devices on human body [1]. However, the effective communication range on human body is limited to less than 1m in the state-of-the-art BCC transceivers [2], where the signal loss at the interface of body surface and BCC receiver remains to...

conference paper 2022

document

Investigation of Potting Compounds on Thermal-Fatigue properties of Solder Interconnects

Du, L. (author), Zhao, Xiujuan (author), Watte, Piet (author), Poelma, René H. (author), van Driel, W.D. (author), Zhang, Kouchi (author)

The objective of this article is to investigate the thermal-fatigue properties of a commercially available lead-free solder alloy (SnBiAgCu) under the use of different types of potting compounds. Solder alloys with lower silver content are expected to substitute the conventional solder alloys SAC305 (Sn-3.0Ag-0.5Cu). First, the tensile...

conference paper 2022

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Hierarchical Motion Planning and Tracking for Autonomous Vehicles Using Global Heuristic Based Potential Field and Reinforcement Learning Based Predictive Control

Du, Guodong (author), Zou, Yuan (author), Zhang, Xudong (author), Li, Z. (author), Liu, Qi (author)

The autonomous vehicle is widely applied in various ground operations, in which motion planning and tracking control are becoming the key technologies to achieve autonomous driving. In order to further improve the performance of motion planning and tracking control, an efficient hierarchical framework containing motion planning and tracking...

journal article 2023

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Speed and heading control-based collision avoidance for a ship towing system

Zhang, Lei (author), Liu, Wenjie (author), Du, Zhe (author), Du, Lei (author), Li, Xiaobin (author)

Collision avoidance is a priority task for ensuring the safety of a maritime transportation system. However, for a ship towing system, which is characterized by multiple vessels and physical connections, the research works about collision avoidance is limited. Thus, this paper proposes a speed and heading control-based conflict resolution of...

journal article 2023

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Connecting the macroscopic and mesoscopic properties of sintered silver nanoparticles by crystal plasticity finite element method

Long, Xu (author), Chong, Kainan (author), Su, Yutai (author), Du, L. (author), Zhang, Kouchi (author)

The stress–strain response of sintered silver nanoparticles (AgNP) materials is precisely characterized in order to adapt for numerical analysis and rational design of electronic packaging structures in this study. A framework of crystal plasticity finite element method (CPFEM) is established based on the mechanism of crystal plastic...

journal article 2023