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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 | Antibacterial and angiogenic chitosan microneedle array patch for promoting wound healing显示文摘A patch with the capability of avoiding wound infection and promoting tissue remolding is of great value for wound healing.In this paper,we develop a biomass chitosan microneedle array(CSMNA)patch integrated with smart responsive drug delivery for promoting wound healing.Chitosan possesses many outstanding features such as the natural antibacterial property and has been widely utilized for wound healing.Besides,the microstructure of microneedles enables the effective delivery of loaded drugs into the target area and avoids the excessive adhesion between the skin and the patch.Also,vascular endothelial growth factor(VEGF)is encapsulated in the micropores of CSMNA by temperature sensitive hydrogel.Therefore,the smart release of the drugs can be controllably realized via the temperature rising induced by the inflammation response at the site of wounds.It is demonstrated that the biomass CSMNA patch can promote inflammatory inhibition,collagen deposition,angiogenesis,and tissue regeneration during the wound closure.Thus,this versatile CSMNA patch is potentially valuable for wound healing in clinical applications. | Junjie Chi Xiaoxuan Zhang Canwen Chen Changmin Shao Yuanjin Zhao Yongan Wang | 2020 | Bioactive Materials2020，5，2： | 25 |
| 3 | Effect of one-step aging on microstructure and properties of a novel Al-Zn-Mg-Cu-Zr alloy显示文摘The effect of one-step aging temper on the mechanical properties, electrical conductivity and the microstructure of a novel Al-7.5Zn-1.6Mg-1.4Cu-0.12Zr alloy has been investigated. The results indicated that with elevating the aging temperature from 100℃ to 160℃, the aging response rate was greatly accelerated, and the UTS at peak aging condition decreased, while the corresponding TYS increased. However, the electrical conductivity of the alloy became higher. After aging for 24 h at 120℃, the peak UTS and TYS values were achieved as 591 MPa and 541 MPa, respectively; but the alloy achieved a lower conductivity, 20.4 MS/m. When T6 temper was performed at 140℃ for 14 h, the UTS decreased only by 1% of the former, whereas the TYS and the electrical conductivity increased obviously, which were up to 559 MPa and 22.6 MS/m, respectively. The major strengthening precipitates of the peak-aged alloy were GP zones and η′ phase. The precipitates in both the matrix and the grain boundary became coarser with rising aging temperature. There were obvious PFZs along the grain boundary both in T6 conditions aged at 140℃ and 160℃. | LI XiWu XIONG BaiQing ZHANG YongAn HUA Cheng WANG Feng ZHU BaoHong LIU HongWei | 2009 | Science China(Technological Sciences)2009，52，1： | 13 |
| 4 | Effect of Zn addition on microstructure and mechanical properties of an Al–Mg–Si alloy显示文摘In the present work, an Al–0.66Mg–0.85Si–0.2Cu alloy with Zn addition was investigated by electron back scattering diffraction(EBSD), high resolution electron microscopy(HREM), tensile and Erichsen tests. The mechanical properties of the alloy after pre-aging met the standards of sheet forming. After paint baking, the yield strength of the alloy was improved apparently. GP(Ⅱ) zones and η'phases were formed during aging process due to Zn addition. With the precipitation of GP zones, β″ phases, GP(Ⅱ) zones and η'phases, the alloys displayed excellent mechanical properties. | Lizhen Yan Yongan Zhang Xiwu Li Zhihui Li Feng Wang Hongwei Liu Baiqing Xiong | 2014 | Progress in Natural Science:Materials International2014，24，2： | 13 |
| 5 | Ageing behavior of an Al-Zn-Mg-Cu alloy pre-stretched thick plate显示文摘The ageing behavior of a pre-stretched thick plate of Al-Zn-Mg-Cu alloy was systemically studied including one-step ageing, two-step ageing, and retrogression and reageing treatment (RRA). One-step ageing of the alloy resulted in peak ultimate tensile strengths of 595 and 575 MPa after 22 and 6 h at 120 and 135°C, respectively. The strengthening phase in peak aged (T6 temper) alloy contained GP zones and the η′ phase predominantly. After two-step ageing, the electrical conductivity was increased markedly, but the pre-stretched thick plate sacrificed a great loss of strength. RRA treatment provided a method for maintaining the strength close to that obtained by T6 temper and for obtaining the high electrical conductivity close to that obtained by T7 temper; the ultimate tensile strength and electrical conductivity were 583 MPa and 21.0 MS/m, respectively. TEM analysis of T7 and RRA specimens revealed two types of precipitates that contributed to age strengthening i.e. the η′ and η phases. | Zhihui Li Baiqing Xiong Yongan Zhang Baohong Zhu Feng Wang Hongwei Liu | 2007 | Journal of University of Science and Technology Beijing2007，14，3： | 12 |
| 6 | Low-cost,μm-thick,tape-free electronic tattoo sensors with minimized motion and sweat artifacts显示文摘Electronic tattoos(e-tattoos),also known as epidermal electronics,are ultra-thin and ultra-soft noninvasive but skin-conformable devices with capabilities including physiological sensing and transdermal stimulation and therapeutics.The fabrication of e-tattoos out of conventional inorganic electronic materials used to be tedious and expensive.Recently developed cut-and-paste method has significantly simplified the process and lowered the cost.However,existing cut-and-paste method entails a medical tape on which the electronic tattoo sensors should be pasted,which increases tattoo thickness and degrades its breathability.To address this problem,here we report a slightly modified cut-and-paste method to fabricate low-cost,open-mesh e-tattoos with a total thickness of just 1.5μm.E-tattoos of such thinness can be directly pasted on human skin and conforms to natural skin texture.We demonstrate that this ultra-thin,tape-free e-tattoo can confidently measure electrocardiogram(ECG),skin temperature,and skin hydration.Heart rate and even respiratory rate can be extracted from the ECG signals.A special advantage of such ultra-thin e-tattoo is that it is capable of high-fidelity sensing with minimized motion artifacts under various body movements.Effects of perspiration are found to be insignificant due to the breathability of such e-tattoos. | Youhua Wang Yitao Qiu Shideh Kabiri Ameri Hongwoo Jang Zhaohe Dai YongAn Huang Nanshu Lu | 2018 | npj Flexible Electronics2018，2，1： | 9 |
| 7 | Age-hardening characteristic of an Al-Zn-Mg-Cu alloy produced by spray deposition显示文摘Al-10.8Zn-2.8Mg-1.9Cu alloy was synthesized by spray atomization and deposition technique. GP zones and age-hardening process in the alloy were investigated using high-resolution electron microscopy (HREM), selected area diffraction (SAD), and differential scanning calorimetry (DSC) analysis. The results indicated that spray deposition process accelerated the aging kinetics of the alloy at an aging temperature of 120°C, thereby reducing the peak aging time to 16 h. GPI and GPII are the two types of zones that are major precipitates for the alloy under peak-aged condition. The precipitation sequence for the alloy is also discussed. | WANG Feng XIONG Baiqing ZHANG Yongan ZHU Baohong LIU Hongwei ZHANG Zhihui WANG Zixing | 2007 | Rare Metals2007，26，2： | 7 |
| 8 | Aging behavior and fatigue crack propagation of high Zn-containing Al-Zn-Mg-Cu alloys with zinc variation显示文摘In the present work, the influence of two-step aging treatments on hardness, electrical conductivity and mechanical properties of two high Zn-containing Al-Zn-Mg-Cu alloys with zinc content variation was investigated and the detailed T76 aging parameters were proposed. The microstructure of the precipitates were studied by transmission electron microscopy(TEM) and high-resolution transmission electron microscopy(HREM) and then quantitatively investigated with the aid of an image analysis. The fatigue performances were researched by the fatigue crack propagation(FCP) rate test and fracture morphology was observed with scanning electron microscopy(SEM). The results show that the matrix precipitate size distributions of both alloys had significant difference, so as to fatigue crack propagation rates and fracture appearance. The shear and bypass mechanisms of dislocation-precipitate interactions were employed to explain the difference. Among the shearable precipitates, the proportion of larger size precipitates for the higher zinc content alloy is bigger than that for the lower zinc content alloy. The coarse shearable precipitates hinder the propagation of the fatigue cracks, leading to inferior FCP rate. For both alloys, the shear mechanism possesses the dominant factor, finally causing a preponderance in the FCP resistance for the higher zinc content alloy than the lower one. | Kai Wen Yunqiang Fan Guojun Wang Longbing Jin Xiwu Li Zhihui Li Yongan Zhang Baiqing Xiong | 2017 | Progress in Natural Science:Materials International2017，27，2： | 7 |
| 9 | 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 |
| 10 | Ichnofabrics and Their Environmental Interpretation from the Fluvial Deposits of the Middle Triassic Youfangzhuang Formation in Western Henan, Central China显示文摘Fluvial deposits from the Middle Triassic Youfangzhuang Formation in Henan Province, China contain a low-diversity trace fossils. Vertical dwelling burrows of opportunists dominate in active channel, whereas horizontal deposit-feeding, grazing, and vertical dwelling burrows occur in overbank deposits. Seven recurrent ichnofabrics were distingushed. The Palaeophycus tubularis ichnofabric preserves below scour interface between two fluvial cycles. The Skolithos linearis ichnofabric forms in middle to high-energy, soft substrates in the middle and upper parts of active channel deposits under semi-arid climate. The Skolithos linearis-Planolites montanus ichnofabric occurs in the sediments just a little above the Skolithos linearis ichnofabric and is formed in middle-energy, soft substrates in the upper part of active channel deposits. The Planolites montanus ichnofabric is mostly preserved in association with medium- to thick-bedded brown-red silty mudstones or siltstones in low-energy, perennial muddy bottom ponds in overbank settings. The Taenidium barretti ichnofabric is interpreted as periodically exposed ephemeral ponds or low-energy distal floodplain. The Skolithos isp. ichnofabric commonly occurs in middle to high-energy firm ground of proximal foodplain or crevasse-splay deposits. The root trace ichnofabric occurs in the crevasse splay deposits. The presence of thin palaeosols and the abundance of calcretization in mudstones indicate a seasonal climate ranging from humid to semi-arid, with high temperature, rainfall, and well-defined dry and wet seasons. | Min Wang Yongan Qi Da Li Mingyue Dai Yuguang Chang | 2014 | Journal of Earth Science2014，25，4： | 5 |
| 11 | 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 |
| 12 | A Study on Service-Oriented Smart Medical Systems Combined with Key Algorithms in the IoT Environment显示文摘A smart medical service system architecture is proposed in this paper to increase medical resource utilization and improve the efficiency of the medical diagnosis process for complex business scenarios in the Medical Internet of Things(MIoT)environment.The resource representation model theory,multi-terminal aggregation algorithm,and the resource discovery algorithm based on latent factor model are also studied.A smart medical service system within the IoT environment is then developed,based on the open source project.Experimental results using real-world datasets illustrate that the proposed smart medical service system architecture can promote the intelligent and efficient management of medical resources to an extent,and assists in the develop towards digitization,intelligence,and precision in the field of medicine. | Shan Lu Anzhi Wang Shenqi Jing Tao Shan Xin Zhang Yongan Guo Yun Liu | 2019 | China Communications2019，16，9： | 4 |
| 13 | Propofol effectively inhibits lithium-pilocarpine-induced status epilepticus in rats via downregulation of N-methyl-D-aspartate receptor 2B subunit expression显示文摘Status epilepticus was induced via intraperitoneal injection of lithium-pilocarpine.The inhibitory effects of propofol on status epilepticus in rats were judged based on observation of behavior,electroencephalography and 24-hour survival rate.Propofol(12.5-100 mg/kg) improved status epilepticus in a dose-dependent manner,and significantly reduced the number of deaths within 24 hours of lithium-pilocarpine injection.Western blot results showed that,24 hours after induction of status epilepticus,the levels of N-methyl-D-aspartate receptor 2A and 2B subunits were significantly increased in rat cerebral cortex and hippocampus.Propofol at 50 mg/kg significantly suppressed the increase in N-methyl-D-aspartate receptor 2B subunit levels,but not the increase in N-methyl-D-aspartate receptor 2A subunit levels.The results suggest that propofol can effectively inhibit status epilepticus induced by lithium-pilocarpine.This effect may be associated with downregulation of N-methyl-D-aspartate receptor 2B subunit expression after seizures. | Henglin wang Zhuoqiang Wang Weidong Mi Cong Zhao Yanqin Liu Yongan Wang Haipeng Sun | 2012 | Neural Regeneration Research2012，7，11： | 3 |
| 14 | Pricing Based Power Control for Inter-Cell UAV-Assisted Vehicle-to-Vehicle Underlay Communication显示文摘The high-capacity vehicle-to-vehicle(V2 V) communication provides a promising solution to support ubiquitous media streaming and content sharing among vehicles.To extend the V2 V links to multiple cells and manage the inter-cell interference,we proposed an UAV-assisted inter-cell V2 V communication model,in which a shared UAV node is placed in the center of V2 V users.By charging the V2 V users underlay spectrum access fee,the cellular network earn profit at the cost of encountering co-channel interference from V2 V links.A Stackelberg game is formulated to model the interactions between the V2 V links and the cellular links,which are the game follower and the leader respectively.Their utility functions are maximized in terms of accessing price as well as transmit power of V2 V users and UAV relays.Simulation evaluations verify that the power-price tradeoff between V2 V network and cellular network has significant potentials to enhance their utility. | Qin Wang Ye Chen Shu Yin Lei Tian Yongan Guo | 2019 | China Communications2019，16，1： | 3 |
| 15 | Solidification microstructures of Al-Zn-Mg-Cu alloys prepared by spraydeposition and conventional casting methods显示文摘高力量 Al-Zn-Mg-Cu 合金被水花免职准备并且扔技术。Al-Zn-Mg-Cu 合金的微观结构用扫描电子显微镜学,传播电子显微镜学,和 X 光检查衍射被学习。在水花免职和常规演员组准备的合金的微观结构的第二等的阶段被检验。结果显示在常规扔条件下面,合金的微观结构揭示了粗糙的 Al/Mg ( ZnCu )的存在扔的 2 个最容易溶解的阶段,和水花处理原因在尺寸的明显的修正,形态学,并且在分离的微观结构以及减小的第二等的阶段的分发。扔水花的 Al-Zn-Mg-Cu 合金的优异微观结构被归因于高冷却率,并且与快速的团结过程联系了。 | HE Xiaoqing XIONG Baiqing SUN Zeming ZHANG Yongan WANG Feng ZHU Baohong | 2008 | Rare Metals2008，27，2： | 3 |
| 16 | Magnetic rotation imaging method to measure the geomagnetic field显示文摘A new imaging method for measuring the geomagnetic field based on the magnetic rotation effect is put forward. With the help of polarization property of the sunlight refiected from the ground and the magnetic rotation of the atmosphere, the geomagnetic field can be measured by an optical system installed on a satellite. According to its principle, the three-dimensional image of the geomagnetic field can be obtained. The measuring speed of this method is very high, and there is no blind spot and distortion. In this paper, the prin- ciple of this method is presented, and some key problems are discussed. | Xiaojun Li Jintao Bai Yongan Li Xiaoniu Li Yuanyuan Wang Xiaoqiang Feng | 2008 | Progress in Natural Science:Materials International2008，18，1： | 2 |
| 17 | Experimental and density functional theory study of the adsorption of N_2O on ion-exchanged ZSM-5: Part II. The adsorption of N_2O on main-group ion-exchanged ZSM-5显示文摘The adsorption and desorption of N 2 O on main-group ion-exchanged ZSM-5 was studied using temperature-programmed desorption (TPD) and density functional theory (DFT) calculations. TPD experiments were carried out to determine the desorbed temperature T max corresponding to the maximum mass intensity of N 2 O desorption peak and adsorption capacity of N 2 O on metal-ion-exchanged ZSM- 5s. The results indicated that T max followed a sequence of Ba 2+ > Ca 2+ > Cs + > K + > Na + > Mg 2+ and the amount of adsorbed N 2 O on main-group metal cation followed a sequence of Ba 2+ > Mg 2+ > Ca 2+ > Na + > K + > Cs + . The DFT calculations were performed to obtain the adsorption energy (E ads ), which represents the strength of the interaction between metal cations and the N-end or O-end of N 2 O. The calculation results showed that the N-end of the N 2 O molecule was favorably adsorbed on ion-exchanged ZSM-5, except for Cs-ZSM-5. For alkali metal cations, the E ads of N 2 O on cations followed the order which was the same to that of T max : Cs + > K + > Na + . The calculated and experimental results consistently showed that the adsorption performances of alkaline-earth metal cations were better than those of alkali metal cations. | Bo Zhang Yongan Lu Hong He Jianguo Wang Changbin Zhang Yunbo Yu Li Xue | 2011 | Journal of Environmental Sciences2011，23，4： | 2 |
| 18 | Moderate sewage sludge biochar application on alkaline soil for corn growth:a field study显示文摘In view of the risks induced by the inhibitory effects of applying impracticably large amounts of sewage sludge biochar(SSB)to the alkaline soil,this field study investigated the influence of moderate biochar amendments(0,1500,4500,and 9000 kg/hm2)on corn growth,alkaline soil properties,and the uptake of potentially toxic elements(PTEs).The results showed that applying more SSB would decrease the ammonium nitrogen concentration and increase the available phosphorus and potassium concentrations,which inhibited corn plant growth because of high background nutrient levels of the alkaline soil.When the alkaline soil was amended with 1500 kg/hm2 SSB,the dry weight of 100 niblets increased from 32.11 g in the control to 35.07 g.There was no significant variation in the total concentration of PTEs in the soil.The concentrations of Mn,Ni,Cu,and Zn in niblets decreased from 5.54,0.83,2.26,and 27.15 mg/kg in the control to 4.47,0.62,1.30,and 23.45 mg/kg,respectively.Accordingly,the health risk from corn consumption was significantly reduced.Furthermore,the combination of SSB and fertilizer improved corn growth and reduced the risk of consumption of PTEs.Therefore,considering the increase in corn fruit yield and the decrease in consumption risk,applying 1500 kg/hm2 of biochar to alkaline soils is a realistically achievable rate,which can broaden the utilization of SSB for remediation of different types of soil. | Shengyu Xie Guangwei Yu Ruqing Jiang Jianli Ma Xiaofu Shang Gang Wang Yin Wang Yongan Yang Chunxing Li | 2021 | Biochar2021，3，2： | 2 |
| 19 | Effect of P/M value on the preforms and microstructures of spray formed 70Si30Al alloy显示文摘A novel 70Si30Al alloy was prepared by the spray forming process for electronic packaging materials. The effect of the ratio of atomization pressure to metal melt mass flux rate (P/M) on the preforms and microstructures of the spray-deposited 70Si30Al alloy was studied. The results indicate that the P/M value has a considerable influence on the formation of the preforms and the optimal value is in the range of 0.209-0.231 MPa/(kg·min^(-1)). The microstructure of the spray formed 70Si30Al alloy is fine and homogenous. The primary silicon phases distributing in the aluminum matrix evenly are fine and irregular. The aluminum matrix is divided into two groups: supersaturated α-Al phase or α-Al phase and Al-Si pseudoeutectic phase or Al-Si eutectic phase. | Yanguang Wei Baiqing Xiong Yongan Zhang Hongwei Liu Feng Wang Baohong Zhu | 2007 | Journal of University of Science and Technology Beijing2007，14，2： | 2 |
| 20 | Oil Recovery and Permeability Reduction of a Tight Sandstone Reservoir in Immiscible and Miscible CO2Flooding Processes显示文摘 | Wang Xiaoqi and Gu Yongan | 2011 | Industrial&Engineering Chemistry Research2011，50，4： | 1 |
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