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LP-LDPC:Three-Level Parallel FPGA Architecture for Fast Prototyping of LDPC Decoder Using High-Level Synthesis

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Journal of Computer Science & Technology 2022年第6期37卷 1290-1306页

作者： yi-fan zhang Lei Sun Qiang Cao Wuhan National Laboratory for Optoelectronics Wuhan 430074China

Low-Density Parity-heck Codes(LDPC)with excellent error-correction capabilities have been widely used in both data communication and storage fields,to construct reliable cyber-physical systems that are resilient to real-world *** prototyping field-programmable gate array(FPGA)-based decoder is essential to achieve high decoding performance while accelerating the development *** paper proposes a three-level parallel architecture,TLP-LDPC,to achieve high throughput by fully exploiting the characteristics of both LDPC and underlying hardware while effectively scaling to large-size FPGA *** three-level parallel architecture contains a low-level decoding unit,a mid-level multi-unit decoding core,and a high-level multi-core *** low-level decoding unit is a basic LDPC computation component that effectively combines the features of the LDPC algorithm and hardware with the specific structure(e.g.,Look-Up-Table,LUT)of the FPGA and eliminates potential data *** mid-level decoding core integrates the input/output and multiple decoding units in a well-balancing pipelined *** top-level multi-core architecture conveniently makes full use of board-level resources to improve the overall *** develop an LDPC C++code with dedicated pragmas and leverage HLS tools to implement the TLP-LDPC *** results show that TLP-LDPC achieves 9.63 Gbps end-to-end decoding throughput on a Xilinx Alveo U50 platform,3.9x higher than existing HLS-based FPGA implementations.

关键词： low-density parity-check(LDPC) high-level synthesis(HLS) field-programmable gate array(FPGA)

Using ChatGPT to promote college students’participation in physical activities and its effect on mental health

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World Journal of Psychiatry 2024年第2期14卷 330-333页

作者： yi-fan zhang Xin-Qiao Liu School of Education Tianjin UniversityTianjin 300350China

As one of the most famous large language models,ChatGPT has great potential for application in physical *** can provide personalized exercise plans,a variety of exercise options,and interactive *** integration of ChatGPT into the teaching process can promote college students’participation in physical activities and improve their mental health while expanding the traditional teaching environment and promoting the reform of traditional teaching ***,the application of ChatGPT faces challenges and obstacles in physical *** make full use of ChatGPT in physical education,it can be combined with wearable devices and sports equipment to enhance the efficiency of interactions with *** policies are urgently needed to avoid the improper use of users’data.

关键词： ChatGPT College students Physical education Mental health

Supramolecular polymer network constructed by a functionalized polyimidazolium salt derived from metal-carbene template approach

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Science China Chemistry 2024年第4期67卷 1224-1228页

作者： Ming-Ming Gan Zi-En zhang yi-fan zhang Heng zhang Li-ying Sun ying-Feng Han Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education Xi’an Key Laboratory of Functional Supramolecular Structure and MaterialsCollege of Chemistry and Materials ScienceNorthwest UniversityXi’an 710127China

In this study,we present a supramolecular templating approach for constructing polyimidazolium salt containing crown ether and cyclobutane *** strategy involves the formation of metal-carbene templates,photochemical cycloaddition,and subsequent demetallation of metal *** by the host-guest chemistry between crown ether units and ammonium salts,we successfully fabricated a supramolecular polymer SPN1,which features imidazolium receptors and cyclobutane *** obtained SPN1 demonstrates outstanding reversible stimulus-response,antibacterial behavior and conductivity.

关键词： metal-carbene template crown ether polyimidazolium salt host-guest chemistry

Optimum thickness of Mssbauer absorber

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Nuclear Science and Techniques 2000年第2期11卷 91-95页

作者： CHEN yi-Long yi fan, zhang Fu-Liang(Department of Physics of Wuhan University,Wuhan 430072) Department of Physics of Wuhan University Wuhan 430072

If recoilless fraction fa is available, the optimum absorber thickness dopt can be calculated by maximizing the signal to noise ratio or Q factor. In this work,an approach presented is to get experimental Qexp as a function of the thickness,andthen fitting Qexp by its theoretical expression gives fa value. At last the dopt value is deduced from a maximum on the fitted *** such a way, thicknesses of six specimens with quadrupole or magnetic hyperfinc splitting were optimized.

关键词：穆斯堡尔光谱穆斯保尔效应信噪比最佳吸收厚度噪声光谱吸收

Influence of DC Current on Corrosion Behaviour of Copper–Aluminium Composite Plates

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Acta Metallurgica Sinica(English Letters) 2021年第8期34卷 1142-1152页

作者： Yu-Lin Cheng Xiao-Jiao Zuo Xiao-Guang Yuan Hong-Jun Huang yi-fan zhang School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

In this study, neutral salt spray accelerated corrosion test of copper–aluminium composite under 0–125 A DC current was carried out under 5% concentration. The effect of corrosion behaviour on copper–aluminium composite by DC current was carried out by a scanning electron microscope(SEM) with energy-dispersive spectroscopy(EDS), X-ray diffraction(XRD) patterns, X-ray photoelectron spectroscopy(XPS), weight-loss method and electrochemical analysis. The results show that the current can accelerate the corrosion rate. Meanwhile, the current temperature effect can reduce the corrosion rate. The current caused directional migration of ions resulting in different corrosion products on positive and negative poles of specimen, and the corrosion degree on the positive pole was more serious. The galvanic corrosion mechanism at the copper–aluminium interface is different from the pitting corrosion mechanism far away from the interface, and the latter is more affected by DC current.

关键词： Copper–aluminium composite Corrosion DC current Ionic migration Temperature effect

Magnetic nanoparticles based cancer therapy: current status and applications

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Science China(Life Sciences) 2018年第4期61卷 400-414页

作者： Huan zhang Xiao Li Liu yi fan zhang Fei Gao Ga Long Li Yuan He Ming Li Peng Hai Ming fan Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials Science Northwest University CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety National Center for Nanoscience and Technology

Nanotechnology holds a promising potential for developing biomedical nanoplatforms in cancer therapy. The magnetic nanoparticles, which integrate uniquely appealing features of magnetic manipulation, nanoscale heat generator, localized magnetic field and enzyme-mimics, prompt the development and application of magnetic nanoparticles-based cancer medicine. Considerable success has been achieved in improving the magnetic resonance imaging(MRI) sensitivity, and the therapeutic function of the magnetic nanoparticles should be given adequate attention. This work reviews the current status and applications of magnetic nanoparticles based cancer therapy. The advantages of magnetic nanoparticles that may contribute to improved therapeutics efficacy of clinic cancer treatment are highlighted here.

关键词： magnetic nanoparticles therapeutic delivery magnetic hyperthermia treatment theranostics

Clinical characteristics and prognostic factors for visual outcome in 669 patients with intraocular foreign bodies

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International Journal of Ophthalmology(English edition) 2021年第5期14卷 759-765页

作者： Yu-Zhu Gao yi-fan zhang Ming zhang Han-Yue Xu Xu-Rui Jin Department of Ophthalmology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Duke Global Health Research Institute 310 Trent DriveDurhamNC 27710Box 905119DurhamNC 27708USA

AIM: To describe the clinical characteristics and analyze prognostic factors that influence visual outcome in 669 patients with intraocular foreign bodies(IOFBs).METHODS: Medical records of 669 patients with IOFBs from West China Hospital were reviewed. Best corrected visual acuity(BCVA) values were recorded using standard Snellen acuity chart and were converted to logarithm of the minimum angle of resolution(log MAR) scale for statistical analysis. The visual outcome was defined by the final BCVA(excellent visual outcome: final BCVA of 20/40 or better;poor visual outcome: final BCVA less than 20/200). Statistical analysis of collected data was performed using IBM SPSS Statistics version 23. A 2-tailed P value of less than 0.05 was considered statistically significant throughout the study. RESULTS: The average age ranged from 1 to 79 years old(mean age, 34.8±12.7 SD) and the majority of patients were men(626, 93.6%). The major cause of ocular injury was hammering(383, 57.2%). Almost all the patients(97.8%) underwent surgeries(97.8%) and the average time interval between injury and surgery was 26.4±322.3 d(0-7300), while 327 patients received surgeries within 24 h(48.9%) and 590 patients received surgeries within seven days(88.2%) after IOFBs injury. The poor BCVA was associated with older age(P=0.013), larger IOFBs size(P<0.001), presence of complications(P<0.001) and worse presenting BCVA(P<0.001). On the contrary, younger age(P=0.005), smaller IOFBs size(P<0.001), absence of complications(P<0.001) and better presenting BCVA(P<0.001) were considered to relate to excellent ***: Multiple prognostic factors may influence the final visual outcome, including age, size of IOFBs, complications and presenting BCVA. Meanwhile, further education and promotion on eye protection should be taken for the improvement on self-protection and selfhealth awareness.

关键词： intraocular foreign bodies prognostic factors visual outcome

Preparation and radar-absorbing properties of Al2O3/TiO2/Fe2O3/Yb2O3 composite powder

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International Journal of Minerals,Metallurgy and Materials 2017年第2期24卷 216-221页

作者： yi-fan zhang Zhen Ji Ke Chen Cheng-chang Jia Shan-wu Yang Meng-ya Wang School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Al2O3/TiOe/FeeO3/Yb2O3 composite powder was synthesized via the sol-gel method. The structure, morphology, and ra- dar-absorption properties of the composite powder were characterized by transmission electron microscopy, X-ray diffraction analysis and RF impedance analysis. The results show that two types of particles exist in the composite powder. One is irregular flakes （100-200 rim） and the other is spherical A1203 particles （smaller than 80 rim）. Electromagnetic wave attenuation is mostly achieved by dielectric loss. The maximum value of the dissipation factor reaches 0.76 （at 15.68 GHz） in the frequency range of 2-18 GHz. The electromagnetic absorption of waves covers 2-18 GHz with the matching thicknesses of 1.5-4.5 mm. The absorption peak shifts to the lower-frequency area with increas- ing matching thickness. The effective absorption hand covers the frequency range of 2.16-9.76 GHz, and the maximum absorption peak reaches -20.18 dB with a matching thickness of 3.5 mm at a frequency of 3.52 GHz.

关键词： nanocomposites radar absorbing materials sol-gel processing electromagnetic wave attenuation

Study on the preparation of Pt nanocapsules

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International Journal of Minerals,Metallurgy and Materials 2017年第1期24卷 109-114页

作者： yi-fan zhang Zhen Ji Ke Chen Bo-wen Liu Cheng-chang Jia Shan-wu Yang School of Materials Science and Technology University of Science and Technology BeijingBeijing 100083China

Ag@Pt core-shell nanoparticles（Ag@Pt NPs） were prepared by a co-reduction method. Pt nanocapsules with diameters of less than 10 nm were obtained by an electrochemical method. Cyclic voltammetry（CV） scanning was used to cavitate the Ag@Pt NPs, and the morphology, structure, and cavitation conditions were studied. The results indicate that the effective cavitation conditions to obtain Pt nanoparticles from Ag@Pt NPs are a scanning voltage of 0 to 0.8 V and continuous CV scanning over 2 h. This cavitation method is also applicable for the syntheses of Ir, Ru, and Ru-Pt nanocapsules.

关键词： platinum nanocapsules cavitation preparation methods