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Electrochemical formation of La-Al intermetallic compounds in fluoride melts

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Rare Metals 2023年第9期42卷 3170-3176页

作者： Ping Pan Shi-hong Yan Lin Zhou De-hong Chen hong-bo Yang Rui-Ying Miao National Engineering Research Center for Rare Earth Materials General Research Institute for Nonferrous MetalsBeijing100088China Grirem Advanced Materials Co. Beijing100088China

The electrochemical formation of La-Al alloys in LiF-CaF_(2)molten salt on a molybdenum electrode at 1123 K was investigated by electrochemical techniques,such as cyclic voltammetry,square-wave voltammetry and open-circuit *** formation signals of four types of Al-La intermetallic compounds were *** Al-La alloy was obtained through galvanostatic electrolysis at 2.5 A·cm^(-2)for 3 *** phase composition and microstructure of the electrolytic products were analysed by X-ray diffraction(XRD)and scanning electron microscopy with energy-dispersive spectroscopy(EDS).XRD results show that the phase compositions of the alloys are Al_(11)La_(3)and Al,and EDS results reveal 26.7 at%La in the alloy.

关键词： Co-reduction Lanthanum aluminium alloys Molten fluorides

Crosstalk-free multichannel sensor based on a dual-Sagnac interferometer interrogated by microwave photonic filter

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Optoelectronics Letters 2025年

作者： ZHANG Ailing WANG bo ZHANG Yongfu CHANG Pengxiang WANG Minghe LIN Rui Engineering Research Center of Optoelectronic Devices & Communication Technology， Ministry of Education， Tianjin Key Laboratory of Film Electronic and Communication Devices， School of Electrical and Electronic Engineering， Tianjin University of Technology

A crosstalk-free multichannel sensor based on a dual-Sagnac interferometer interrogated by microwave photonic filter (MPF) is demonstrated theoretically and experimentally in this paper. The dual-Sagnac interferometer is taken as the sensing element as well as an optical spectrum slicer to implement a dual-passband MPF. Experimental results show that the proposed multichannel sensor is crosstalk-free， and the temperature sensitivity of each channel is -0.9884 MHz/℃ and -1.9302 MHz/℃， respectively. The sensing interrogation system has good linearity and stability and it is suitable for application scenarios where multiple points of temperature are required to monitor simultaneously.

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Frequency notched wide slot antenna for UWB/2.4 GHz WLAN applications

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The Journal of China Universities of Posts and Telecommunications 2007年第4期14卷 122-125页

作者： LO Wen-jun ZHU hong-bo Laboratory of Wireless communications and EMC Nanjing University ofPosts and Telecommunications Nanjing 210003 China

Abstract A compact frequency notched microstrip slot antenna for ultra-wideband （UWB）/2.4 GHz-band wireless local area network（WLAN） applications is proposed. The antenna is similar to a conventional microstrip slot antenna; however, by introducing a cross wide slot and a meandered-slotted stub, both compact size and frequency notched function can be achieved. It has been studied both numerically and experimentally for its impedance bandwidth, surface current distribution, radiation patterns, and gain. As will be seen, an operation bandwidth of over 4.6：1 ranging fi＇om 2.39 to 11.25 GHz for return loss lower than -10 dB having a frequency notched band ranging from 4.75 to 5.85 GHz has been achieved, and good radiation performance over the entire frequency range has also been achieved.

关键词： printed slot antenna frequency notched ultrawideband 2.4 GHz-band WLAN

On Common Eigenvector of Parametric Interaction Hamiltonian and Number-Difference Operator Derived by Virtue of Entangled State Representation

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Communications in Theoretical Physics 2007年第1期47卷 139-142页

作者： FAN hong-Yi GAO Wei-bo Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China

By virtue of the properties of bipartite entangled state representation we derive the common eigenvector of the parametric Hamiltonian and the two-mode number-difference operator. This eigenvector is superposition of some definite two-mode Foek states with the coefficients being proportional to hypergeometric functions. The Gauss contiguous relation of hypergeometrie functions is used to confirm the formal solution.

关键词： bipartiteentangled state representation number-difference operator hypergeometric functions

Solving Laguerre-Gauss Mode Eigenvectors and Eigenfunctions in Entangled State Representation

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Communications in Theoretical Physics 2006年第4期45卷 617-620页

We solve the Laguerre-Gauss mode eigenvectors and eigenfunctions in the entangled state representation by searching for common eigenvectors of the 2-dimensional harmonic oscillator＇s total energy operator and the angular momentum operator, We find that in the entangled state representation the eigen-solution satisfies the Hukuhara equation, and its solution is confluent hypergeometric function.

关键词： Laguerre-Gauss modes entangled state representation

Redox-active Ferrocene-dithiolenes Hybrid Complexes Showing Switchable Nonlinear Optical Properties

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Chemical Research in Chinese Universities 2015年第5期31卷 792-796页

作者： YU Hailing hong bo ZHAO hongyan College of Resources and Environmental Sciences Jilin Agricultural University Changchun 130118 P R. China State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration Northeast Normal University Changchun 130024 P R. China

Density functional theory（DFT） calculations were carried out to investigate the geometry structures, redox properties and second-order nonlinear optical（NLO） properties of ferrocene（Fc）-dithiolenes hybrid complexes. The switchable second-order NLO properties of these complexes are induced by the redox process. The oxidized process significantly affects the geometrical structures of the dithiolene moieties, that is, the embowed dithiolene moieties change into planar structures. It supports that the dithiolene moieties are the oxidized center. The βtot values of the cationic species are at least 4 and 10 times those of their corresponding parent complexes, respectively. Further, the time-dependent DFT calculation illustrates that the low-energy absorption（which is helpful for the large NLO response） is mainly assigned to intra-ligand charge transfer [π（ex-dithiolene）→π（ex-dithiolene）]. These results suggest the potential use of the novel Fc-based dithiolenes complexes as versatile and fascinating NLO switching materials.

关键词： Dithiolene Redox Nonlinear optical Molecular switching Density functional theory

High sensitivity dual polarization four channels surface plasmon resonance refractive index sensor with wide detection range and high linearity based on photonic crystal fiber

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Optoelectronics Letters 2025年

作者： CUI Nan PAN honggang ZHANG Ailing ZHAO Zihong CHEN Zhipan ZHANG bo Tianjin Key Laboratory of Film Electronic and Communication Devices， Engineering Research Center of Optoelectronic Devices and Communication Technology， Ministry of Education， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

In this paper， we propose and numerically characterize the optical characteristics of a high sensitivity dual polarization four channels surface plasmon resonance refractive index sensor with wide detection range and high linearity based on photonic crystal fiber （PCF）. Four light transmission channels are constructed by using big air holes. The small rectangular air hole in the center of the fiber core is used to add asymmetry. We use gold plasma material to achieve better sensing performance. A thin film of TiO2is placed on the PCF surface， which assists gold in the adhesion on PCF. The maximum wavelength sensitivity of the sensor can reach 20000 nm/RIU in both x and y polarization modes. While the maximum wavelength resolution of the sensor is 5×10-6RIU. The average wavelength sensitivity reached 15900nm/RIU and 15800nm/RIU in x and y polarization mode. The sensor features R2=0.9969 / R2=0.9966 high linear performance in x and y polarization mode and the maximum FOM values 509.13 RIU-1/ 489.63 RIU-1in x and y polarization mode. Besides the sensor’s detection range is 1.26-1.36， which is a wide refractive index detection range. The sensor has a wide range of applications in biomedical and other fields.

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Nonlinear fusion estimation for false data injection attack signals in cyber-physical systems

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Science China(Information Sciences) 2023年第7期66卷 309-310页

作者： Yawen TAN Pindi weng bo CHEN Li YU Department of Automation Zhejiang University of Technology Institute of Cyberspace Security Zhejiang University of Technology

Cyber-physical systems(CPSs) that integrate computation,network, and physical objects play essential roles in the era of Industry 4.0 [1, 2]. However, the introduction of networks makes it face the threat of cyber-attacks [3]. Among various types of cyber-attacks, a false data injection(FDI) attack degrades the estimation performance for CPSs by injecting wrong signals and is one of the most dangerous attacks [4,5]. Therefore, the joint estimation of FDI attacks and system states is of great significance to the security of CPSs.

关键词： Iterative methods

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Double-detonation model of type Ia supernovae with a variable helium layer ignition mass

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Research in Astronomy and Astrophysics 2014年第9期14卷 1146-1156页

作者： Wei-hong Zhou bo Wang Gang Zhao National Astronomical Observatories Chinese Academy of Sciences University of Chinese Academy of Sciences Yunnan University of Nationalities Yunnan Observatories Chinese Academy of Sciences Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences

Although Type Ia supernovae （SNe Ia） play an important role in the study of cosmology, their progenitors are still poorly understood. Thermonuclear explosions from the helium double-detonation sub-Chandrasekhar mass model have been considered as an alternative method for producing SNe Ia. By adopting the assumption that a double detonation occurs when a He layer with a critical ignition mass accumulates on the surface of a carbon-oxygen white dwarf （CO WD）, we perform detailed binary evolution calculations for the He double-detonation model, in which a He layer from a He star accumulates on a CO WD. According to these calculations, we obtain the initial parameter spaces for SNe Ia in the orbital period and secondary mass plane for various initial WD masses. We implement these results into a detailed binary population synthesis approach to calculate SN Ia birthrates and delay times. From this model, the SN Ia birthrate in our Galaxy is ～0.4 - 1.6 × 10^-3 yr^-1. This indicates that the double-detonation model only produces part of the SNe la. The delay times from this model are ～ 70 - 710 Myr, which contribute to the young population of SNe Ia in the observations. We found that the CO WD ＋ sdB star system CD-30 11223 could produce an SN Ia via the double-detonation model in its future evolution.

关键词： binaries: close-- stars: evolution -- supernovae: general -- white dwarfs