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| 1 | Inkjet printing for flexible electronics:Materials,processes and equipments显示文摘Inkjet printing, known as digital writing technique, can directly deposit functional materials to form pattern onto substrate. This paper provides an overview of inkjet printing technologies for flexible electronics. Firstly, we highlight materials challenges in implementing flexible devices into practical application, especially for inkjet printing process. Then the micro/nano-patterning technologies of inkjet printing are discussed, including conventional inkjet printing techniques and electrohydrodynamic printing techniques. Thirdly, the related equipments on inkjet printing are shown. Finally, challenges for its future development are also discussed. The main purpose of the work is to condense the basic knowledge and highlight the challenges associated with the burgeoning and exciting field of inkjet printing for flexible electronics. | YIN ZhouPing HUANG YongAn BU NingBin WANG XiaoMei XIONG YouLun | 2010 | Chinese Science Bulletin2010，55，30： | 25 |
| 2 | Robust adaptive control for a nonholonomic mobile robot with unknown parameters显示文摘A robust adaptive controller for a nonholonomic mobile robot with unknown kinematic and dynamic parameters is proposed.A kinematic controller whose output is the input of the relevant dynamic controller is provided by using the concept of backstepping.An adaptive algorithm is developed in the kinematic controller to approximate the unknown kinematic parameters,and a simple single-layer neural network is used to express the highly nonlinear robot dynamics in terms of the known and unknown parameters.In order to attenuate the effects of the uncertainties and disturbances on tracking performance,a sliding mode control term is added to the dynamic controller.In the deterministic design of feedback controllers for the uncertain dynamic systems,upper bounds on the norm of the uncertainties are an important clue to guarantee the stability of the closed-loop system.However,sometimes these upper bounds may not be easily obtained because of the complexity of the structure of the uncertainties.Thereby,simple adaptation laws are proposed to approximate upper bounds on the norm of the uncertainties to address this problem.The stability of the proposed control system is shown through the Lyapunov method.Lastly,a design example for a mobile robot with two actuated wheels is provided and the feasibility of the controller is demonstrated by numerical simulations. | Jinbo WU Guohua XU Zhouping YIN | 2009 | 控制理论与应用(英文版)2009，7，2： | 9 |
| 3 | Driving force planning in shield tunneling based on Markov decision processes显示文摘In shield tunneling, the control system needs very reliable capability of deviation rectifying in order to ensure that the tunnel trajectory meets the permissible criterion. To this goal, we present an approach that adopts Markov decision process (MDP) theory to plan the driving force with explicit representation of the uncertainty during excavation. The shield attitudes of possi- ble world and driving forces during excavation are scattered as a state set and an action set, respectively. In particular, an evaluation function is proposed with consideration of the stability of driving force and the deviation of shield attitude. Unlike the deterministic approach, the driving forces based on MDP model lead to an uncertain effect and the attitude is known only with an imprecise probability. We consider the case that the transition probability varies in a given domain estimated by field data, and discuss the optimal policy based on the interval arithmetic. The validity of the approach is discussed by comparing the driving force planning with the actual operating data from the field records of Line 9 in Tianjin. It is proved that the MDP model is reasonable enough to predict the driving force for automatic deviation rectifying. | HU XiangTao HUANG YongAn YIN ZhouPing XIONG YouLun | 2012 | Science China(Technological Sciences)2012，55，4： | 6 |
| 4 | Flexible smart sensing skin for“Fly-by-Feel”morphing aircraft显示文摘Flexible smart sensing skin is a key enabling technology for the future'Fly-by-Feel'control of morphing aircraft.It represents the next-generation skin of aircraft that can exhibit a more powerful sensing function than a conventional one and could be mounted on arbitrary curvilinear surfaces,especially for advanced autonomic,morphing aircraft.Recent significant technical advances in flexible electronics have overcome many historic drawbacks of conventional smart skin,e.g.,only a limited number of discrete block sensors can be integrated due to the inevitable structural damage and heavy guidelines.Herein,we review the key developments in flexible sensors technology and highlight both the state-of-the-art devices and the potential applications for the measurement of aircraft.We begin with the importance of flexible smart skin for morphing aircraft and then expand to the latest progress in various types of flexible sensors.Then we highlight flexible sensors as smart skin to measure aerodynamic parameters and monitor the structural health,and further to achieve the Fly-by-Feel control.Finally,the challenges and opportunities on flexible smart sensing skin are discussed,from the functional design to practical applications. | HUANG YongAn ZHU Chen XIONG WenNan WANG Yu JIANG YongGang QIU Lei GUO DongLiang HOU Chao JIANG Shan YANG ZhaoXi WANG Bo WANG Lu YIN ZhouPing | 2022 | Science China(Technological Sciences)2022，65，1： | 6 |
| 5 | Theoretical and experimental study of 2D conformability of stretchable electronics laminated onto skin显示文摘Smoothly attaching the stretchable epidermal electronic devices(EEDs) onto the skin surface is highly desired to improve the measurement accuracy of electrophysiological signal.The paper presents an analytical approach to study interfacial mechanics of the 2D planar EEDs on the checkerboard buckling patterns of human skin.Energy variation method is proposed to determine a criterion whether EEDs laminate conformally onto the skin surface under undeformed and stretched cases.EEDs with low bending stiffness(thin,soft devices/backing layer),smooth and soft skin,and strong adhesion promote conformal contact.Furthermore,the adhesion energy at the EED/skin interface is measured by the homemade peeling experiment platform with different substrate thicknesses and areal coverages.The upper limit of the areal coverage for EED conformal contact with the skin is proposed with given EED/skin properties.Conformability of EEDs are validated by experiments with different substrate thickness,areal coverage and external loadings.It provides a design guideline for EED to conformally contact with the skin surface for more accurate biological signal monitoring. | DONG WenTao XIAO Lin ZHU Chen YE Dong WANG ShuoDao HUANG YongAn YIN ZhouPing | 2017 | Science China(Technological Sciences)2017，60，9： | 4 |
| 6 | Experimental study of laser lift-off of ultra-thin polyimide film for flexible electronics显示文摘It is increasingly crucial for flexible electronics to efficiently and reliably peel large-area, ultra-thin flexible films off from rigid substrate serving as substrates of flexible electronics device, especially in industrial production. This paper experimentally investigated the mechanism and technologic characteristics of laser lift-off(LLO) process of ultra-thin(~ 2 μm) polyimide(PI)film. It was found increasingly difficult to obtain desirable ultra-thin PI film by LLO with the decrease of the film thickness. The optimal process parameters were achieved considering laser fluence and accumulated irradiation times(AIT), which were found to be strongly correlative to the thickness of PI film. The process mechanism of LLO of PI film was disclosed that laser ablation of interfacial PI will result in the formation of gas products between the PI and glass substrate, enabling the change of interface microstructures to reduce the interface bond strength. The amount of gas products mainly determines the result of LLO process for ultra-thin PI film, from residual adhesion to wrinkles or cracking. The strategy of multi-scanning based on multiple irradiations of low-energy laser pulses was presented to effectively achieve a reliable LLO process of ultra-thin PI film. This study provides an attractive route to optimize the LLO process for large-scale production of ultra-thin flexible electronics. | BIAN Jing ZHOU LaoBoYang WAN XiaoDong LIU MinXiao ZHU Chen HUANG YongAn YIN ZhouPing | 2019 | Science China(Technological Sciences)2019，62，2： | 2 |
| 7 | Defective point data reconstruction based on improved process of morphological operations显示文摘In industry,the defective point data often make most surface reconstruction methods suffer from inherent problems that some specific aided information is difficult to obtain. To solve the problem,a novel implicit reconstruction method without any such information is proposed. This approach extends morphological operations into 3D space and provides an improved procedure to construct off-set gradient functions for indirect approximation. By this method,the dual relative functions guarantee a minimal crust surrounding the point data. They can generate a smooth and watertight resulting surface,filling holes and merging overlapping samples reasonably. Compared with other existing methods,the proposed method is better suited to handle defective point clouds in a convenient and efficient manner. The feasibility and effectiveness of the method are demonstrated through a series of practical examples. | YIN ZhouPing MO Kun XIONG YouLun | 2011 | Science China(Technological Sciences)2011，54，12： | 2 |
| 8 | Flexible hybrid electronics:Enabling integration techniques and applications显示文摘The conventional electronic systems enabled by rigid electronic are prone to malfunction under deformation,greatly limiting their application prospects.As an emerging platform for applications in healthcare monitoring and human-machine interface(HMI),flexible electronics have attracted growing attention due to its remarkable advantages,such as stretchability,flexibility,conformability,and wearing comfort.However,to realize the overall electronic systems,rigid components are also required for functions such as signal acquisition and transmission.Therefore,flexible hybrid electronics(FHE),which simultaneously possesses the desirable flexibility and enables the integration of rigid components for functionality,has been emerging as a promising strategy.This paper reviews the enabling integration techniques for FHE,including technologies for two-dimensional/three-dimensional(2 D/3 D) interconnects,bonding of rigid integrated circuit(IC) chips to soft substrate,stress-isolation structures,and representative applications of FHE.In addition,future challenges and opportunities involved in FHE-based systems are also discussed. | WU Hao HUANG YongAn YIN ZhouPing | 2022 | Science China(Technological Sciences)2022，65，9： | 2 |
| 9 | A novel approach to fixture design on suppressing machining vibration of flexible workpiece显示文摘 | Shasha Zeng Xiaojin Wan Wenlong Li Zhouping Yin Youlun Xiong | 2012 | International Journal of Machine Tools and Manufacture2012，，： | 1 |
| 10 | High probability impulse noise-removing algorithm based on mathematical morphology 显示文摘 | DENG Zefeng YIN Zhouping XIONG Youlun | 2007 | IEEE Signal Processing Letters2007，14，1： | 1 |
| 11 | The fast multi- level Fuzzy edge detection of blurry images显示文摘 | WU Jinbo YIN Zhouping XIONG Youlun | 2007 | IEEE Sig- nal Processing Letters2007，14，5： | 1 |
| 12 | A connector-based hierarchical approach to assembly sequence planning for mechanical assemblies显示文摘 | Yin Zhouping Ding Han Li Hanxiong | 2003 | Computer Aided Design2003，35，1： | 1 |
| 13 | Virtual prototyping of mold design:geometric mouldability analysis for near-net-shape manufactured parts by feature recognition and geometric reasoning显示文摘 | Yin Zhouping Ding Han Xiong Youlun | 2001 | Computer-Aided Design2001，33，2： | 1 |
| 14 | A connector-based hierarchical approach to assembly sequence planning for mechanical assemblies显示文摘 | Yin ZhouPing Ding Han Li HanXiong | 2003 | Computer-Aided Design2003，35，1： | 1 |
| 15 | Flexible electronics manufacturing technology and equipment显示文摘Flexible electronics such as mechanically compliant displays,sensors and solar cells,have important applications in the fields of energy,national defence and biomedicine,etc.Various types of flexible electronics have been proposed or developed by the improvements in structural designs,material properties and device integrations.However,the manufacturing of flexible electronics receives little attention,which limits its mass production and industrialization.The increasing demands on the size,functionality,resolution ratio and reliability of flexible electronics bring several significant challenges in their manufacturing processes.This work aims to report the state-of-art technologies and applications of flexible electronics manufacturing.Three key technologies including electrohydrodynamic direct-writing,flip chip and automatic optical inspection are highlighted.The mechanism and developments of these technologies are discussed in detail.Based on these technologies,the present work develops three kinds of manufacturing equipment,i.e.,inkjet printing manufacturing equipment,robotized additive manufacturing equipment,and roll-to-roll manufacturing equipment.The advanced manufacturing processes,equipment and systems for flexible electronics pave the way for applications of new displays,smart sensing skins and epidermal electronics,etc.By reviewing the developments of flexible electronics manufacturing technology and equipment,it can be found that the existing advances greatly promote the applications and commercialization of flexible electronics.Since flexible electronics manufacturing contains many multi-disciplinary problems,the current investigations are confronted with great challenges.Therefore,further developments of the reviewed manufacturing technology and equipment are necessary to break the current limitations of manufacturing resolution,efficiency and reliability. | YIN ZhouPing HUANG YongAn YANG Hua CHEN JianKui DUAN YongQing CHEN Wei | 2022 | Science China(Technological Sciences)2022，65，9： | 1 |
| 16 | Geometric Mould Ability Analysis by Geometric Reasoning and Fuzzy Decision Making 显示文摘 | Yin Zhouping Ding Han Li Hanxiong | 2004 | Computer-aided De- sign2004，36，1： | 1 |
| 17 | The fast multilevel fuzzy edge detection of blurry images显示文摘 | Wu Jinbo Yin Zhouping Xiong Youlun | 2007 | IEEE Signal Processing Letter2007，14，5： | 1 |
| 18 | Virtual prototyping of mold design:geometric mould ability anal- ysis for near-net-shape manufactured parts by feature recognition and geometric reasoning显示文摘 | YIN ZHOUPING DING HAN XIONG YOULUN | 2001 | Computer Aided Design2001，33，2： | 1 |
| 19 | Mouldability Analysis for Near- net- shape Manufactured Parts Using Freedom Cones显示文摘 | Yin Zhouping Ding Han Xiong Youlun | 2000 | International Journal of Advanced Manufacturing Technology2000，16，3： | 1 |
| 20 | Real-time adaptive particle image velocimetry for accurate unsteady flow field measurements显示文摘Almost all conventional open-loop particle image velocimetry(PIV) methods employ fixed-interval-time optical imaging technology and the time-consuming cross-correlation-based PIV measurement algorithm to calculate the velocity field.In this study,a novel real-time adaptive particle image velocity(RTA-PIV) method is proposed to accurately measure the instantaneous velocity field of an unsteady flow field.In the proposed closed-loop RTA-PIV method,a new correlation-filter-based PIV measurement algorithm is introduced to calculate the velocity field in real time.Then,a Kalman predictor model is established to predict the velocity of the next time instant and a suitable interval time can be determined.To adaptively adjust the interval time for capturing two particle images,a new high-speed frame-straddling vision system is developed for the proposed RTA-PIV method.To fully analyze the performance of the RTA-PIV method,we conducted a series of numerical experiments on ground-truth image pairs and on real-world image sequences. | OUYANG ZhenXing YANG Hua LU Jin HUANG YongAn YIN ZhouPing | 2022 | Science China(Technological Sciences)2022，65，9： | 1 |
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