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MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for Sensitized Microwave Actuation and Self-Powered Motion Sensing

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NANO-MICRO LETTERS 2025年第1期17卷 1-15页

作者： Wang, Yu-Ze Wang, Yu-Chang Liu, Ting-Ting Zhao, quan-liang Li, Chen-Sha Cao, Mao-Sheng Beijing Inst Technol Sch Mat Sci & Engn Beijing 100081 Peoples R China Peking Univ Sch Mat Sci & Engn Beijing 100871 Peoples R China North China Univ Technol Sch Mech & Mat Engn Beijing 100144 Peoples R China Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China

Polymeric microwave actuators combining tissue-like softness with programmable microwave-responsive deformation hold great promise for mobile intelligent devices and bionic soft robots. However, their application is challenged by restricted electromagnetic sensitivity and intricate sensing coupling. In this study, a sensitized polymeric microwave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx (MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique space-charge polarization and interfacial polarization, resulting in significant improvements of 230% in the dielectric loss factor and 830% in the apparent efficiency of electromagnetic energy harvest. The sensitized microwave actuation demonstrates as the shortened response time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (up to 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combines driving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of similar to 3 mV) during actuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approach for developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest Self-sensing Soft actuator

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Micromagnetic simulation of FeCo write head in perpendicular recording hard disk drives

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Rare Metals 2006年第z1期25卷 502-508页

作者： quan liang WEI Dan Lab of Advanced Materials Department of Materials Science and Engineering Tsinghua University Beijing 100084 China Lab of Advanced Materials Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

The single-pole tip (SPT) heads made of the high saturation FeCo ferromagnetic metals are crucial for the actualization of ultrahigh density perpendicular recording. The effective head field distribution in the medium is of key importance for the design of the SPT head, which would be analyzed by micromagnetic simulations in this work. Two 3D micromagnetic models of the SPT head were established to select a more appropriate method of modeling, with a magnetostatic image effect or a real soft magnetic material to model the image of the SPT head in soft under layer (SUL). The results from these two designs were tested and compared to the ideal head field calculated by the Jacobi finite element method (FEM); and the design with the real soft magnetic material as image was proved suitable for simulating the ultrahigh density perpendicular recording write head.

关键词： SPT head perpendicular recording micromagnetic simulation image

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Research on the distribution characteristics of explosive shock waves at different altitudes

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Defence Technology（防务技术） 2023年第6期24卷 340-348页

作者： liang-quan Wang De-ren Kong Nanjing University of Science and Technology Nanjing210094China

There are great differences in the distribution characteristics of shock waves produced by ammunition explosions at different *** present,there are many studies on plain explosion shock waves,but there are few studies on the distribution characteristics of plateau explosion shock waves,and there is still a lack of complete analysis and evaluation *** paper compares and analyzes shock wave overpressure data at different altitudes,obtains the attenuation effect of different altitudes on the shock wave propagation process and proposes a calculation formula for shock wave overpressure considering the effect of *** data analysis results show that at the same TNT equivalent and the same distance from the measuring point,the shock wave overpressure at high altitude is lower than that at low *** the increase in the explosion center distance of the measuring point,the peak attenuation rate of the shock wave overpressure at high altitudes is smaller than that at low altitudes,and the peak attenuation rate of the shock wave overpressure at high altitudes gradually intensifies with increasing proportional *** average error between the shock wave overpressure and measured shock wave overpressure in a high-altitude environment obtained by using the above calculation formula is 11.1389%.Therefore,this method can effectively predict explosion shock wave overpressure in plateau environments and provides an effective calculation method for practical engineering tests.

关键词： Shock wave overpressure calculation Pressure attenuation law Altitude correction factor Engineering numerical model

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Causal association rule mining methods based on fuzzy state description

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Journal of Systems Engineering and Electronics 2006年第1期17卷 193-199页

作者： liang Kaijian liang quan Yang Bingru Dept. of Computer Hunan Inst. of Engineering Xiangtan 411101 P. R. China School of Information and Engineering Univ. of Science and Technology Beijing Beijing 100083 P. R. China

Aiming at the research that using more new knowledge to develope knowledge system with dynamic accordance, and under the background of using Fuzzy language field and Fuzzy language values structure as description framework, the generalized cell Automation that can synthetically process fuzzy indeterminacy and random indeterminacy and generalized inductive logic causal model is brought forward. On this basis, a kind of the new method that can discover causal association rules is provded. According to the causal information of standard sample space and commonly sample space, through constructing its state （abnormality） relation matrix, causal association rules can be gained by using inductive reasoning mechanism. The estimate of this algorithm complexity is given,and its validiw is proved through case.

关键词： knowledge discovery language field language value structure generalized cell automation generalized inductive logic causal model causal association rule.

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Surface Oscillation and Flow Structure of a Liquid Bridge under Small Vibration

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Chinese Physics Letters 2014年第4期31卷 81-84页

作者： liang Ru-quan Kawaji Masahiro Key Laboratory of National Education Ministry for Electromagnetic Process of Materials Northeastern University Shenyang 110004 Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto MSS 3E5 Canada

A three-dimensional direct numerical simulation is carried out to predict the surface oscillation and flow structure of isothermal liquid bridges of 5 cSt silicone oil held vertically between solid disks. By subjecting liquid bridges to various horizontal vibrations, the surface resonance frequencies are clearly determined numerically and compared well with the existing analytical model predictions. The investigation on the flow structure inside the liquid bridge reveals, for the first time, the flow structure and the existence of transw＇,rsal vortices inside the liquid bridge when a horizontal vibration is applied.

关键词： MACHINE-tools -- Numerical control COMPUTER simulation OSCILLATIONS SPHEROMAKS SILICONES

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REG增强的脱细胞猪角膜/聚甲基丙烯酸羟乙酯原位一体式全层复合人工角膜

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中国组织工程研究 2025年第16期29卷 3388-3399页

作者：辛远吴茜茜全亮张亨通敖强四川大学生物医学工程学院四川省成都市610064

背景:目前用于全层移植的人工角膜缺乏生物活性及力学适配性,组合式人工角膜存在镜柱和周围组分间的界面问题。目的:在脱细胞猪角膜原位固化制备具有多肽增强、匹配自然角膜机械强度、良好透光性的一体式全层人工角膜。方法:使用非离子... 详细信息

背景:目前用于全层移植的人工角膜缺乏生物活性及力学适配性,组合式人工角膜存在镜柱和周围组分间的界面问题。目的:在脱细胞猪角膜原位固化制备具有多肽增强、匹配自然角膜机械强度、良好透光性的一体式全层人工角膜。方法:使用非离子型脱细胞试剂Triton X-100与超声冻融及超级核酸酶相结合的方法制备脱细胞猪角膜,将聚甲基丙烯酸羟乙酯单体与光引发剂同时引入脱细胞猪角膜中,通过紫外滤光片遮住除中心区域以外的部分,使用275 nm紫外光引发中央区域聚合,除去未反应的单体及引发剂后得到中央光学区,同理在后板层固化隔水区,最后引入REG活性多肽,得到原位一体式全层人工角膜,表征人工角膜的物理性能、力学性能、透光性、降解性能及体内外生物相容性。结果与结论:①实验在脱细胞猪角膜的中央区域采用聚甲基丙烯酸羟乙酯原位构建了一个具有聚合物和胶原纤维共存的光学区,扫描电镜下可见人工角膜的上表面较为粗糙且轮廓不规则,具有明显的凹陷和突起结构,下表面相对光滑;该人工角膜具有接近于天然角膜的力学性能,光学区透光率达到自然角膜的80%,浸泡于含胶原酶的PBS无菌溶液中可较好地保留固化光学区和隔水区,维持角膜的基本结构;该人工角膜具有良好的细胞相容性,能够为细胞提供适宜的黏附生长环境,有利于角膜上皮细胞的迁移和黏附,促进血管内皮细胞的生长和新生血管的形成,促进上皮化过程;人工角膜植入SD大鼠皮下12周后具有良好的生物相容性和安全性,可降低植入初期的急性炎症反应;②结果表明,实验制备的一体式全层人工角膜具有作为全层人工角膜支架材料的潜力。

关键词：人工角膜脱细胞猪角膜紫外光固化甲基丙烯酸羟乙酯组织工程 REG多肽

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Hot deformation behavior and process parameter optimization of Ti22Al25Nb using processing map

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Rare Metals 2016年第1期35卷 118-126页

作者： Jing-Li Zhang Hong-Zhen Guo Hou-quan liang School of Materials Science and Engineering Northwestern Polytechnical University

The hot deformation behavior of Ti22A125 Nb was investigated by hot compression *** flow stressstrain curves can be divided into two types：conventional dynamic recrystallization（DRX） and discontinuous *** different softening mechanism and micro structure observation of conventional DRX and discontinuous DRX were *** processing map（PM） of Ti22A125 Nb was built to predict the safe deformation *** optimal low strain rate domain（DOM I） with high power dissipation efficiency indicates the complete ***,in the high strain rate and low-temperature domain（DOM Ⅲ）,the power dissipation efficiency is low and some adiabatic shear bands and glide bands are observed,which are unsafe and should be ***,the DRX map was *** DOM I,it reveals low dislocation density and high DRX content,which is in agreement with PM.

关键词： Ti22Al25Nb Intermetallic Processing map Hot deformation behavior Microstructure

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Resource Virtualization Model Using Hybrid-graph Representation and Converging Algorithm for Cloud Computing

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International Journal of Automation and computing 2013年第6期10卷 597-606页

作者： quan liang Yuan-Zhuo Wang Yong-Hui Zhang School of Information Sciences and Engineering Fujian University of Technology Institute of Computing Technology Chinese Academy of Sciences

Cloud computing can provide a great capacity for massive computing, storage as well as processing. The capacity comes from the cloud computing system itself, which can be likened to a virtualized resource pool that supports virtualization applications as well as load migration. Based on the existing technologies, the paper proposes a resource virtualization model （RVM） utilizing a hybrid-graph structure. The hybrid-graph structure can formally represent the critical entities such as private clouds, nodes within the private clouds, and resource including its type and quantity. It also provides a clear description of the logical relationship and the dynamic expansion among them as well. Moreover, based on the RVM, a resource converging algorithm and a maintaining algorithm of the resource pool which can timely reflect the dynamic variation of the private cloud and resource are presented. The algorithms collect resources and put them into the private cloud resource pools and global resource pools, and enable a real-time maintenance for the dynamic variation of resource to ensure the continuity and reliability. Both of the algorithms use a queue structure to accomplish functions of resource converging. Finally, a simulation platform of cloud computing is designed to test the algorithms proposed in the paper. The results show the correctness and the reliability of the algorithms.

关键词： Cloud computing resource virtualization hybrid graph resource converging simulation.

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Infinite Horizon Forward-Backward Doubly Stochastic Differential Equations and Related SPDEs

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Acta Mathematicae Applicatae Sinica 2021年第2期37卷 319-336页

作者： Qing-feng ZHU liang-quan ZHANG Yu-feng SHI School of Mathematics and quantitative Economics Shandong University of Finance and EconomicsandShandong Key Laboratory of Blockchain FinanceJinan 250014China Institute for Financial Studies and School of Mathematics Shandong UniversityJinanChina School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China

A type of infinite horizon forward-backward doubly stochastic differential equations is *** some monotonicity assumptions,the existence and uniqueness results for measurable solutions are established by means of homotopy method.A probabilistic interpretation for solutions to a class of stochastic partial differential equations combined with algebra equations is given.A significant feature of this result is that the forward component of the FBDSDEs is coupled with the backward variable.

关键词： infinite horizon forward-backward doubly stochastic differential equations homotopy stochastic partial differential equation

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Determination of gross α and β activities in Zouma River based on online HPGe gamma measurement system

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Nuclear Science and Techniques 2020年第12期31卷 65-76页

作者： Xian Guan liang-quan Ge Guo-Qiang Zeng Xiao-Qin Deng Li-Peng Xu Sheng-liang Guo Key Laboratory of Applied Nuclear Techniques in Geosciences of Sichuan Province Chengdu University of TechnologyChengdu 610059China Sichuan Management&Monitoring Center Station of Radioactive Environment Chengdu 610031China Chengdu New Nuclear Tyco Technology Co. LtdChengdu 610052China

This paper describes a low-cost and fast method to evaluate gross α and β^(-) radioactivities in natural water based on an online high-purity germanium detector gamma measurement *** major gamma activities in natural water are provided by natural and artificial radionuclides such as ^(40) K,^(137)Cs,and radionuclides belonging to ^(238)U and ^(232)Th *** main a emitters related to gamma emissions in natural water are ^(224)Ra(240.98 keV)and ^(226)Ra(186.21 keV),and the β^(-) emitters are ^(40) K(1460.85 keV),^(214)Bi(609.31 keV),^(208)Tl(583.19 keV),and ^(214)Pb(351.93 keV).The formula for gross α and β^(-) activity concentration is based on these radionuclides,and the short half-life decay products are considered in the *** detection efficiency of the device across energy region(0–3 MeV)is obtained through Monte Carlo simulation,and a calibration experiment is conducted to verify the simulation *** radioactivity is measured continuously for 114 d in Pixian County and Dongfeng Canal located in the Zouma River,Chengdu,Sichuan Province,China.A comparison of the calculation results and monitoring data from the Sichuan Management and Monitoring Center Station of Radioactive Environment indicates that the percentage and absolute error of a activity concentration is lower than 53%and 0.02 Bq/L,respectively,and that of β-activity concentration is lower than 33.2%and 0.016 Bq/L,*** method can rapidly determine gross α and β^(-) activity concentrations in natural water online.

关键词： Grossαandβ^(-)activity HPGe gamma spectrometer Online radioactivity level measurement for natural water Natural radioactivity Water sources of Chengdu

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