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multifunction IN SINGLE-SINTERED SrTiO_3 CERAMICS

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Journal of Wuhan University of Technology(Materials Science) 1997年第4期12卷 39-43页

作者：徐庆 Wuhan University of Technology China Inst. of Mater. and Eng. Wuhan Univ. of Tech. Wuhan 430070 China

The multifunction of SrTiO3 ceramics prepared by a single-sintering process is investigated. It is found that both the oxidizing annealing temperature and time show singnificant influences on multifunction. The characteristics of grain and grainboundary are analysed by means of AC impedance spectroscopy while the equivalent circuit is presented. The mechanism of grain semiconducting and grain-boundary insulating is also discussed。

关键词： SrTiO3 ceramics multifunction sin- gle-sintering process

Influence of doped Ag^+ on multifunction characteristics in SrTiO_3 ceramics

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中国有色金属学会会刊：英文版 2000年第1期10卷 69-72页

作者：徐庆陈文袁润章武汉工业大学材料复合新技术国家重点实验室湖北武汉

SrTiO 3 capacitor varistor multifunction ceramics is fabricated by a single sintering process. The research is carried out, mainly aimed at the influence of the doped Ag + on multifunction characteristics in SrTiO 3 ceramics and its mechanism. The results show that the density of grain boundary acceptor state increases effectively due to the fact that Sr 2+ on grain surface is substituted by doped Ag distributing at grain boundary in form of Ag + during the course of oxidizing annealing, which is proposed to be the fundamental reason for understanding the significant difference of both the dielectric properties and varistor properties in SrTiO 3 ceramics samples with various Ag + contents.

关键词： SrTiO 3 ceramics capacitor varistor multifunction Ag + doping

Effect of Ultrasonic Irradiation Conditions on Metal Surface during multifunction Cavitation

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Materials Sciences and Applications 2018年第8期9卷 698-704页

作者： Masataka Ijiri Toshihiko Yoshimura Sanyo-Onoda City University Sanyo-Onoda Japan

Processing using multifunction cavitation (MFC) has recently enabled functional characteristics to be imparted to various materials. It is possible to process a material surface in the same manner as with conventional water jet (WJ) peening;however, the cavitation bubble temperature is different. To further improve this MFC technology, we examine the surface re-forming of low alloy steel (JIS-SCM435) using MFC with various modes of ultrasonic waves. The ultrasonic equipment used for MFC processing includes dual, single, pulse and frequency modulation (FM) ultrasonic modes. Improvement of the residual stress and corrosion resistance was confirmed for all modes. The dual mode showed the maximum values of residual compressive stress and surface potential. The sound pressure at the machining spot was the highest with dual mode, and the temperature in the bubble generated by the WJ nozzle was highest and the amount of dissolved oxygen was lowest. Improvement of the residual stress and corrosion resistance was promoted because the temperature and pressure in the bubble interior during processing was higher than in the other modes.

关键词： multifunction Cavitation Residual Stress Corrosion Resistance Ultrasonic Water Jet Peening

Spatio-temporal Pattern of multifunction Tradeoffs and Synergies of the Rural Landscape:Evidence from Qingpu District in Shanghai

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Journal of Resources and Ecology 2021年第2期12卷 225-240页

作者： REN Guoping LIU Liming LI Hongqing YIN Gang ZHAO Xu College of Management Hunan City UniversityYiyangHunan 413000China Hunan New-type Urbanization Insitute Hunan 413000China College of Land Science and Technology China Agricultural UniversityBeiing 100193China School of Public Administration Hohai UniversityNanjing 211100China

The configuration of a multifunctional rural landscape is critical for its *** studies on multifunctional rural landscapes have been conducted,there is a lack of information regarding the spatiotemporal characteristics and tradeoff/synergy relationships of rural landscape functions in the time series on the administrative unit *** purposes of this study were to(1)analyze the spatial-temporal distribution characteristics of the tradeoff and synergy from the perspective of multifunctionality for efficient use of rural landscape resources and(2)formulate regional sustainable development policies to minimize the conflict between people and *** at the scientific representation of landscape function and the quantification of landscape multifunctional relationships,and by taking Qingpu District of Shanghai as an example,six kinds of rural landscape functions were constructed according to the functional framework of"productive function,living function and ecological function".Based on the data for 1980 to 2018,the characteristics of variations of multifunctional tradeoff and synergy relationships of the rural landscape in 184 administrative villages were studied by the methods of Spearman rank correlation coefficient analysis and bivariate spatial *** following results were obtained.1)The fine division of rural landscape function types was realistic and necessary for analyzing the regional multi-function relationships in the regions with rapid *** the process of rapid urbanization,the rural landscape functions of urban suburban areas changed under the combined action of natural resource endowment,social and economic conditions and other internal and external *** a result,the agricultural production function could not replace the economic development function and become the function of rural landscape *** research results of Qingpu District showed that the agricultural production function was no lon

关键词： rural landscape multifunction evolution tradeoff and synergy Qingpu District

A Novel multifunction CFOA-Based Inverse Filter

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Circuits and Systems 2011年第1期2卷 14-17页

作者： Hung-Yu Wang Sheng-Hsiung Chang Tzu-Yi Yang Po-Yang Tsai 不详

We present a novel multifunction inverse biquad configuration based on current feedback operational amplifiers (CFOAs) and grounded passive elements. The proposed scheme can be used to realize inverse lowpass, inverse bandpass and inverse highpass filter functions. The relevant coefficients of the inverse filters are orthogonal adjustable by independent passive elements. All the passive elements in the proposed scheme are grounded to benefit easier electronic tunability. With the high input impedance and low output impedance properties, the scheme is input and output cascadable for voltage operation. The feasibility of the proposed scheme is demonstrated by HSPICE simulations.

关键词： multifunction Inverse Filter CFOA

Tightness and Fan Tightness on multifunction Spaces

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Journal of Mathematical Research and Exposition 2008年第4期28卷 1007-1012页

作者：李祖泉 Department of Mathematics Hangzhou Normal University

In this paper, we discuss tightness and fan tightness of multifunction spaces with pointwise convergence topology or compact-open topology, and generalize some results on con- tinuous single-valued function spaces to ... 详细信息

关键词： multifunction pointwise convergence topology compact-open topology tightness fan tightness.

Magneto‑Dielectric Synergy and Multiscale Hierarchical Structure Design Enable Flexible Multipurpose Microwave Absorption and Infrared Stealth Compatibility

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Nano-Micro Letters 2025年第2期17卷 401-416页

作者： Chen Li Leilei Liang Baoshan Zhang Yi Yang Guangbin Ji School of Electronic Science and Engineering Nanjing UniversityNanjing 210093People’s Republic of China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China

Developing advanced stealth devices to cope with radar-infrared(IR)fusion detection and diverse application scenarios is increasingly demanded,which faces significant challenges due to conflicting microwave and IR cloaking mechanisms and functional integration ***,we propose a multiscale hierarchical structure design,integrating wrinkled MXene IR shielding layer and flexible Fe_(3)O_(4)@C/PDMS microwave absorption *** top wrinkled MXene layer induces the intensive diffuse reflection effect,shielding IR radiation signals while allowing microwave to pass ***,the permeable microwaves are assimilated into the bottom Fe_(3)O_(4)@C/PDMS layer via strong magneto-electric *** theoretical and experimental optimization,the assembled stealth devices realize a near-perfect stealth capability in both X-band(8–12 GHz)and long-wave infrared(8–14μm)wavelength ***,it delivers a radar cross-section reduction of−20 dB m^(2),a large apparent temperature modulation range(ΔT=70℃),and a low average IR emissivity of ***,the optimal device demonstrates exceptional curved surface conformability,self-cleaning capability(contact angle≈129°),and abrasion resistance(recovery time≈5 s).This design strategy promotes the development of multispectral stealth technology and reinforces its applicability and durability in complex and hostile environments.

关键词： Microwave absorption Radar-infrared compatible stealth Wrinkled MXene Magneto-dielectric synergy multifunction

multifunctional polyethyleneimine for synthesis of core-shell nanostructures and electrochemiluminescent detection of three AMI biomarkers

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Science China Chemistry 2021年第12期64卷 2230-2238页

作者： Xu Liang Lan Mi Zhengyou Yu Minghan Wang Yuecong Hu Xinhe Zheng Yi Shao Zhiwei Zhu Yuanhua Shao Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China

Simplicity and stability of an analytical method are the key to practical *** order to achieve such a goal,a molecule with multifunction could be one of the *** this work,the multifunctional characteristics of branched polyethylenemine(bPEI)were employed for verification of this *** types of amines in the bPEI can be used to synthesize core-shell nanostructures(bPEI@Au and SiO_(2)@bPEI@Au)in a simple one-pot process within 1 h,and as coreactants with over 500-fold enhancement for electrochemiluminescent(ECL)*** on the remarkable performance of bPEI,a label-free ECL immunosensor and its array with the same assembly strategy were constructed for the simple and rapid determination of three acute myocardial infarction(AMI)biomarkers:cardiac troponin I(cTnI),human-type fatty acid binding protein(hFABP)and *** methods exhibited excellent stability and sensitivity with wide linear range and low limits of detection down to fg/mL level by the photomultiplier tube and pg/mL level by the electron-multiplying charge-coupled device.

关键词： simplicity multifunction branched polyethylenemine electrochemiluminescence AMI biomarkers

multifunctional sulfur-immobilizing GO/MXene aerogels for highly-stable and long-cycle-life lithium-sulfur batteries

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Rare Metals 2023年第8期42卷 2577-2591页

作者： Wen-Hao Yang Zhi-Cong Ni Dan You Ji-Yue Hou Bing-Nan Deng Rong-Wei Huang Shi-Gang Sun Jin-Bao Zhao Xue Li Yi-Yong Zhang Ying-Jie Zhang Key Laboratory of Advanced Battery Materials of Yunnan Province College of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming oouuyocnina State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Lithium-sulfur batteries are a promising candidate for next-generation energy storage due to their high theoretical energy ***,S insulation and the lithium polysulfide intermediate’s shuttle effect greatly hinder its practical *** this paper,a three-dimensional porous graphene oxide(GO)/MXene(Ti_(3)C_(2)T_(x))(GM)aerogel is designed and applied to a lithium-sulfur battery to settle the problem *** this strategy,two-dimensional(2D)GO sheets and highly conductive MXene nanosheets are integrated to form a 3D porous aerogel structure,creating a 3D conductive network and large polar surfaces,which can simultaneously achieve fast Li-ion/electron transport,strong chemical anchoring sulfur,and promot redox reactions between poly ***,the cathode shows excellent sulfur utilization and cycle *** prepared GM electrode battery has been tested for nearly nine months at 0.1C,providing the high initial capacity of 1255.62 mAh·g^(-1)and maintaining615.7 mAh·g^(-1)after 450 cycles.

关键词： Lithium-sulfur battery Aerogel Graphene oxide(GO) Ti_(3)C_(2)T_(x) multifunction