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Recent progress on printable power supply devices and systems with nanomaterials

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Nano Research 2018年第6期11卷 3065-3087页

作者： Yuanjing Lin Yuan gao fang fang Zhiyong Fan Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong China Department of Materials Science Fudan University Shanghai 200433 China

In recent years, tremendous research interest has been triggered in the fields of flexible, wearable and miniaturized power supply devices and self-powered energy sources, in which energy harvesting/conversion devices are integrated with energy storage devices into an infinitely self-powered energy system. As opposed to conventional fabrication methods, printing techniques hold promising potency for fabrication of power supply devices with practical scalability and versatility, especially for applications in wearable and portable electronics. To further enhance the performance of the as-fabricated devices, the utilization of nanomaterials is one of the promising strategies, owing to their unique properties. In this review, an overview on the progress of printable strategies to revolutionize the fabrication of power supply devices and integrated system with attractive form factors is provided. The advantages and limitations of the commonly adopted printing techniques for power supply device fabrication are first summarized. Thereafter, the research progress on novel developed printable energy harvesting and conversion devices, including solar cells, nanogenerators and biofuel cells, and the research advances on printable energy storage devices, namely, supercapacitors and rechargeable batteries, are presented, respectively. Although exciting advances on printable material modification, innovative fabrication methods and device performance improvement have been witnessed, there are still several challenges to be addressed to realize fully printable fabrication of integrated self-powered energy sources.

关键词： printing techniques energy conversion energy storage integrated self-powered system

扬子板块西南缘早前寒武纪地质演化:来自撮科元古宙变沉积岩碎屑锆石U-Pb年龄、Hf-O同位素的制约

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岩石学报 2025年第1期41卷 304-320页

作者：高嘉敏谢士稳刘倩王舫陶鹏龙涛中国地质大学(北京)地球科学与资源学院北京100083 中国地质科学院地质研究所北京离子探针中心北京100037 山东省第四地质矿产勘查院潍坊261021

扬子板块的太古宙-古元古代基底出露十分有限,制约了对扬子早前寒武纪地质演化的认识。本次研究对扬子板块西南缘撮科地区的大红山群和昆阳群变沉积岩开展了碎屑锆石原位U-Pb年龄、Hf-O同位素及微量元素研究。测年结果显示,大红山群谐... 详细信息

扬子板块的太古宙-古元古代基底出露十分有限,制约了对扬子早前寒武纪地质演化的认识。本次研究对扬子板块西南缘撮科地区的大红山群和昆阳群变沉积岩开展了碎屑锆石原位U-Pb年龄、Hf-O同位素及微量元素研究。测年结果显示,大红山群谐和锆石年龄分布于3092~1786Ma之间,最年轻碎屑锆石年龄为1786Ma,限定大红山群最大沉积时代为古元古代晚期。昆阳群谐和锆石年龄分布于2874~1031Ma之间,最年轻碎屑锆石年龄为1031Ma,表明昆阳群最大沉积时代为中元古代晚期。除少量较年轻锆石(<1.75Ga)外,昆阳群和大红山群具有相似的年龄分布特征,两个主要的年龄峰为2.0~1.85Ga和2.4~2.2Ga。尽管古元古代碎屑锆石的年龄峰与撮科地区已报道的古元古代岩浆活动期次一致,但仅有少部分碎屑锆石的Hf-O同位素特征与撮科古元古代岩浆岩相似,大多数碎屑锆石Hf-O同位素组成与加拿大Rae克拉通古元古代变沉积岩中碎屑锆石相似,暗示古元古代碎屑物质可能仅少部分来自撮科地区已识别的古元古代岩浆岩,而大部分可能来自与Rae克拉通发育的古元古岩浆岩相似的源区。大红山群和昆阳群中1.9~1.03Ga的碎屑锆石可能来自扬子西南缘发育的古元古代晚期-中元古代晚期岩浆岩。结合前人的资料,我们认为我国撮科和越南北部的Phan Si Pan带经历了与加拿大Rae克拉通相似的古元古代演化过程,支持2.4~2.3Ga扬子西南缘卷入Arrowsmith造山事件,并与Rae克拉通一起参与哥伦比亚超大陆聚合过程的认识。

关键词：扬子西南缘撮科地区哥伦比亚超大陆大红山群和昆阳群碎屑锆石

Single-pulse chaotic dynamics of functionally graded materials plate

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Acta Mechanica Sinica 2013年第4期29卷 593-601页

作者： Yu-gao Huangfu fang-Qi Chen College of Mathematics and Information Science Henan Polytechnic University Department of Mathematics Nanjing University of Aeronautics and Astronautics

Single-pulse chaos are studied for a functionally graded materials rectangular plate. By means of the global perturbation method, explicit conditions for the existence of a SiZnikov-type homoclinic orbit are obtained for this sys- tem, which suggests that chaos are likely to take place. Then, numerical simulations are given to test the analytical predic- tions. And from our analysis, when the chaotic motion oc- curs, there are a quasi-period motion in a two-dimensional subspace and chaos in another two-dimensional supplemen- tary subspace.

关键词： Functionally graded materials ~ Single-pulse ~Melnikov's method ~ Homoclinic orbit ~ Numerical simula-tion

Fuzzy Q learning algorithm for dual-aircraft path planning to cooperatively detect targets by passive radars

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Journal of Systems Engineering and Electronics 2013年第5期24卷 800-810页

作者： Xiang gao Yangwang fang Youli Wu School of Aeronautics and Astronautic Engineering Air Force Engineering University

The problem of passive detection discussed in this paper involves searching and locating an aerial emitter by dualaircraft using passive radars. In order to improve the detection probability and accuracy, a fuzzy Q learning algorithrn for dual-aircraft flight path planning is proposed. The passive detection task model of the dual-aircraft is set up based on the partition of the target active radar＇s radiation area. The problem is formulated as a Markov decision process （MDP） by using the fuzzy theory to make a generalization of the state space and defining the transition functions, action space and reward function properly. Details of the path planning algorithm are presented. Simulation results indicate that the algorithm can provide adaptive strategies for dual-aircraft to control their flight paths to detect a non-maneuvering or maneu- vering target.

关键词： Markov decision process (MDP) fuzzy Q learning dual-aircraft coordination path planning passive detection.

Acoustic wireless communication based on parameter modulation and complex Lorenz chaotic systems with complex parameters and parametric attractors

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Chinese Physics B 2021年第8期30卷 248-259页

作者： fang-fang Zhang Rui gao Jian Liu Department of Control Science and Engineering Shandong UniversityJinan 250061China Department of Electrical Engineering and Automation Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China School of Mathematical Sciences University of JinanJinan 250022China

As the competition for marine resources is increasingly fierce,the security of underwater acoustic communication has attracted a great deal of *** information and location of the communicating platform can be leaked during the traditional underwater acoustic communication *** to the unique advantages of chaos communication,we put forward a novel communication scheme using complex parameter modulation and the complex Lorenz ***,we design a feedback controller and parameter update laws in a complex-variable form with rigorous mathematical proofs(while many previous references on the real-variable form were only special cases in which the imaginary part was zero),which can be realized in practical engineering;then we design a new communication scheme employing parameter *** main parameter spaces of the complex Lorenz system are discussed,then they are adopted in our communication *** also find that there exist parametric attractors in the complex Lorenz *** make numerical simulations in two channels for digital signals and the simulations verify our conclusions.

关键词： parameter modulation identification chaotic system acoustic wireless communication

Nociceptors and Macrophages in Bacterial Meningitis:Partners in Crime?

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Neuroscience Bulletin 2024年第3期40卷 418-420页

作者： fang gao Hongzhen Hu The Kimberly and Eric J.Waldman Department of Dermatology Icahn School of Medicine at Mount SinaiNew York NY10029USA The Nash Family Department of Neuroscience Icahn School of Medicine at Mount SinaiNew York NY10029USA The Mark Lebwohl Center for Neuroinfammation and Sensation Icahn School of Medicine at Mount SinaiNew York NY10029USA Friedman Brain Institute Icahn School of Medicine at Mount SinaiNew York NY10029USA

Bacterial meningitis is a serious and potentially life-threatening infection that affects the protective layers surrounding the brain and spinal cord,known as the *** types of bacteria,including Streptococcus pneumoniae,Neisseria meningitidis,and Haemophilus influenzae,can cause this *** populations,such as infants,children,immunocompromised adults,and the elderly,are particularly vulnerable to these *** of bacterial meningitis can manifest suddenly and may include high fever,severe and persistent headache,stiff neck,vomiting,sensitivity to light,and confusion or changes in mental state[1,2].Identifying these symptoms in infants can be more challenging and may lead to long-term disability or death[3].Despite the effectiveness of vaccines,it is crucial to understand how bacteria invade the brain and how our innate immune system responds to infection(Fig.1).

关键词： protective infection suddenly

Scattering Versus Blowup Beyond the Mass-Energy Threshold for the Davey–Stewartson Equation in R^(3)

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Acta Mathematica Sinica,English Series 2021年第9期37卷 1415-1436页

作者： Yan fang gao Zhi Yong WANG School of Mathematics and Statistics&Fujian Key Laboratory of Mathematical Analysis and Applications Fujian Normal UniversityFuzhou 350117P.R.China

We study the Cauchy problem for the Davey–Stewartson equation i?tu+Δu+|u|^(2) u+E1(|u|^(2))u=0,(t,x)∈R×R^(3).The dichotomy between scattering and finite time blow-up shall be proved for initial data with finite va... 详细信息

关键词： Davey–Stewartson equation scattering blow-up finite variance

Semiconducting M_(2)X(M=Cu,Ag,Au;X=S,Se,Te)monolayers:A broad range of band gaps and high carrier mobilities

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Nano Research 2021年第8期14卷 2826-2830页

作者： Lei gao Yan-fang Zhang Shixuan Du Institute of Physics&University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100190China Faculty of Science Kunming University of Science and TechnologyKunming 650000China CAS Key Laboratory of Vacuum Physics Beijing 100049China

Two-dimensional semiconductors(2DSCs)with appropriate band gaps and high mobilities are highly desired for future-generation electronic and optoelectronic ***,using first-principles calculations,we report a novel class of 2DSCs,group-11-chalcogenide monolayers(M_(2)X,M=Cu,Ag,Au;X=S,Se,Te),featuring with a broad range of energy band gaps and high carrier *** energy band gaps extend from 0.49 to 3.76 eV at a hybrid density functional level,covering from ultraviolet-A,visible light to near-infrared region,which are crucial for broadband ***,the calculated room-temperature carrier mobilities of the M_(2)X monolayers are as high as thousands of cm^(2)·V^(-1)·s^(-1).Particularly,the carrier mobilities ofε-Au_(2)Se and e-Au2Te are up to 104 cm^(2)·V^(-1)·s^(-1),which is very attracitive for electronic *** from the broad range of energy band gaps and superior carrier mobilities,the group-11-chalcogenide M_(2)X monolayers are promising candidates for future-generation nanoelectronics and optoelectronics.

关键词： two-dimensional semiconductors group-11-chalcogenides electronic properties first-principles calculations

Effect of ultrasonic vibration on finished quality in ultrasonic vibration assisted micromilling of Inconel718

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Chinese Journal of Aeronautics 2021年第6期34卷 209-219页

作者： Bin fang Zhonghang YUAN Depeng LI Liying gao School of Mechanical and Automotive Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

Inconel718 was machined with the traditional micromilling(TMM)and ultrasonic vibration assisted micromilling(UVAMM)with the different technology parameters,whose surface quality and burrs formation were *** results show that TMM often forms pits,bumps and gullies in the size effect *** effectively improves the surface quality compared with *** surface defects are significantly reduced with the increase of feed per tooth(fz).When fz exceeds 4 lm,the effect of ultrasonic vibration on the surface quality is no longer *** minimum burr size on the down milling side and the up milling side are 50.23 lm and 36.57 lm,*** feasibility of vibration cutting in improving surface quality and suppressing burr size was *** effectively suppresses the formation of built-up edge,which can significantly improve the micromilling *** cutting force is obtained through simulation and *** are agreement in the change *** finite element simulation can be used to predict the cutting *** with TMM,feeding force(Fx),radial force(Fy)and axial force(Fz)of UVAMM decrease by 7.6%,11.5%and 1.3%,respectively.

关键词： Burr Cutting force Simulation Surface quality Ultrasonic vibration assisted micromilling