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Functional sample path properties of subsequence's C-R increments for a Wiener process in Hlder norm

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Applied Mathematics(A Journal of Chinese Universities) 2015年第2期30卷 217-226页

作者： wei Qi-cai School of Mathematics & Computer Science Wuhan Polytechnic University

In this paper, with the aid of large deviation formulas established in strong topology of functional space generated by HSlder norm, we discuss the functional sample path properties of subsequence＇s C-R increments for a Wiener process in HSlder norm. The obtained results, generalize the corresponding results of Chen and the classic Strassen＇s law of iterated logarithm for a Wiener process.

关键词： Wiener process subsequence's C-R increments HSlder norm.

Functional Limit Theorems for C-R Increments of lp-Valued Wiener Processes in the Norm

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Acta Mathematica Sinica,English Series 2005年第3期21卷 517-532页

作者： Qi cai wei Department of Mathematics Huazhong University of Science & Technology Wuhan 430074 P. R. China Department of Mathematics & Physics Wuhan Polytechnic University Wuhan 430023 P. R. China

In this paper, based on accurately large deviation formulae established in strong topology generated by the Holder norm for l^2-valued Wiener processes, we obtain the functional limit theorems for C-R increments of l^... 详细信息

关键词： Large deviations C-R increments l^p-valued Wiener processes Holder norm

REFLECTION/TRANSMISSION CHARACTERISTICS OF A DISCONTINUOUS GALERKIN METHOD FOR MAXWELL'S EQUATIONS IN DISPERSIVE INHOMOGENEOUS MEDIA

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Journal of Computational Mathematics 2008年第3期26卷 347-364页

作者： Xia Ji wei cai Pingwen Zhang Department of Mathematics and Statistics University of North Carolina at Charlotte USA Department of Scientific and Engineering Computing Peking University Beijing China

In this paper, we analyze the transmission and reflection properties of a high order discontinuous Galerkin method for dispersive Maxwell＇s equations, originally proposed by Lu et al. [J. Comput. Phys. 200 （2004）, pp. 549-580]. We study the reflection and transmission properties of the numerical method for up to second-order polynomial elements for one- and two-dimensional Maxwell＇s equations with rectangular meshes. High order accuracy has been shown for reflection and transmission coefficients near material interfaces.

关键词： Discontinuous Galerkin Method Reflection Transmission

Electro-optic lithium niobate metasurfaces

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Science China(Physics,Mechanics & Astronomy) 2021年第4期64卷 28-33页

作者： BoFeng Gao MengXin Ren wei Wu wei cai JingJun Xu The Key Laboratory of Weak-Light Nonlinear Photonics Ministry of EducationSchool of Physics and TEDA Applied Physics InstituteNankai UniversityTianjin 300071China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Many applications of metasurfaces require an ability to dynamically change their properties in the time domain. Electrical tuning techniques are of particular interest, since they pave a way to on-chip integration of metasurfaces with optoelectronic *** this work, we propose and experimentally demonstrate an electro-optic lithium niobate(EO-LN) metasurface that shows dynamic modulations to phase retardation of transmitted light. Quasi-bound states in the continuum(QBIC) are observed from this metasurface. By applying external electric voltages, the refractive index of lithium niobate(LN) is changed by Pockels EO nonlinearity, leading to efficient phase modulations to the transmitted light around the QBIC wavelength. The EO-LN metasurface developed in this study opens up new routes for potential applications in the field of displaying, pulse shaping, and spatial light modulating.

关键词： lithium niobate metasurfaces electro-optic modulation bound states in the continuum resonance

RLKs orchestrate the signaling in plant male-female interaction

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Science China(Life Sciences) 2016年第9期59卷 867-877页

作者： Hongju Li wei-cai Yang State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental Biology Chinese Academy of Sciences

Different from animals, sessile plants are equipped with a large receptor-like kinase(RLK) superfamily. RLKs are a family of single trans-membrane proteins with divergent N-terminal extracellular domains capped by a signal peptide and C-terminal intracellular kinase. Researches in the last two decades have uncovered an increasing number of RLKs that regulate plant development, stress response and sexual reproduction, highlighting a dominant role of RLK signaling in cell-to-cell communications. Sexual reproduction in flowering plants is featured by interactions between the male gametophyte and the female tissues to facilitate sperm delivery and fertilization. Emerging evidences suggest that RLKs regulate almost every aspect of plant reproductive process, especially during pollination. Therefore, in this review we will focus mainly on the function and signaling of RLKs in plant male-female interaction and discuss the future prospects on these topics.

关键词： RLK signaling plant reproduction pollen tube female gametophyte male-female interaction pollen tube growth and guidance pollen tube reception

Electrochemical Corrosion Behavior of the DLC Coated and Uncoated NiTi Alloys

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Journal of Materials Science & Technology 2006年第5期22卷 577-580页

作者： Jiehe SUI wei cai Liancheng ZHAO School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

A dense and well-adhered diamond-like carbon （DLC） coating was prepared on the nickel-titanium （NiTi） alloys by plasma immersion ion implantation and deposition （PIIID）. Potentiodynamic polarization tests indicated the corrosion resistance of the NiTi alloys was markedly improved by the DLC coating. The Ni ions release of the NiTi alloys was effectively blocked by the DLC coating.

关键词： NiTi alloys Diamond-like carbon (DLC) Plasma immersion ion implantation and deposition (PIIID) Corrosion resistance

Shape Memory Effect of an Aged Fe-Mn-Si-Co-Mo Alloy

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Journal of Materials Science & Technology 1998年第2期14卷 182-184页

作者： Wang, Zhong cai, wei Zhao, Liancheng Harbin Inst Technol Sch Mat Sci & Engn Harbin 150001 Peoples R China

The effect of ageing on the microstructure, mechanical properties and shape memory effect (SME) in a newly developed Fe-24Mn-5Si-8Co-4Mo shape memory alloy has been studied. It was found that Fe//2Mo particles precipitate during ageing and thereby increase hardness and strength of the alloy. The SME of the alloy can be remarkably improved by ageing, and a maximum SME can be obtained when aged at 873 K. When the ageing temperature is over 873 K, the SME decreases with increasing the ageing temperature. The reason for the improvement of SME by ageing in the Fe-Mn-Si-Co-Mo alloy was discussed. (Edited author abstract) 9 Refs.

关键词： Shape memory effect

Research progresses on equipment technologies used in safety inspection,repair,and reinforcement for deepwater dams

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Science China(Technological Sciences) 2022年第5期65卷 1059-1071页

作者： XIANG Yan SHENG JinBao WANG Lei cai YueBo MENG Ying cai wei Dam Safety Management Department Nanjing Hydraulic Research InstituteNanjing210029China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing210029China Key Laboratory of Reservoir and Dam Safety Ministry of Water ResourcesNanjing210029China China Ship Scientific Research Center Wuxi214000China Hangzhou Hua-Neng Engineering Safety Technology Co. Ltd.Hangzhou310000China

China’s many dams are increasingly facing safety problems resulting from the natural aging of the dam hydraulic structure and geological disasters such as earthquakes under the operating condition of holding a vast amount of *** such as dam leakage and concrete cracking and erosion seriously affect the normal operation and effectiveness of a *** is impossible to empty a large reservoir with a high dam for many reasons,such as serious environmental consequences,and it is thus difficult to detect the working conditions of the underwater part of the *** is an increasingly urgent demand for detection and repair technologies that can be used in the deepwater ***,there are cutting-edge deepwater detection and processing technologies for hidden dangers in dam *** core technologies include underwater detection equipment,diving technologies,and underwater operation *** paper analyzes safety-oriented detection equipment recently used in unmanned detection,manned detection,and deepwater diver detection from the viewpoint of practical *** paper further reviews 100-m-depth-class technologies and applications of safety inspection,repair,and reinforcement equiment in the deepwater environment of reservoir *** outlook is provided on technology trends of deepwater detection,repair,and reinforcement and critical problems.

关键词： dam unmanned detection manned submersible detection deepwater detection deep water repair and reinforcement

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Promotional effect of Si-doped V_2O_5/TiO_2 for selective catalytic reduction of NOx by NH_3

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Journal of Environmental Sciences 2013年第8期25卷 1703-1711页

作者： Yanxiao Pan wei Zhao Qin Zhong wei cai Hongyu Li School of Chemical Engineering Nanjing University of Science and Technology

TiO2 supports doped with different amounts of Si were prepared by a sol-gel method, and 1 wt% vanadia （V2O5） loaded on Si-doped TiO2 was obtained by an impregnation method. The mole ratio of Si/Ti was 0.2, NOx conversion exceeds 94% at 300℃ and GHSV of 41,324 hr-1 , which is about 20% higher than pure V2O5/TiO2 . The catalysts were characterized by XRD, BET, TEM, FT-IR, NH3-TPD, XPS, H2-TPR, Raman and in situ DRIFTS. The results of FT-IR and XPS indicated that Si was doped into the TiO2 lattice successfully and a solid solution was obtained. V2O5 active component could be dispersed well on the support with the increasing of surface area of the catalyst, which was confirmed by Raman and XRD results. Above all, the numbers of acid sites （especially the Br nsted-acid） and oxidation properties were enhanced for Si-doped V2O5/TiO2 catalysts, which improved the deNOx catalytic activity.

关键词： Si-doped V2O5/TiO2 SCR Si-O-Ti VOx species