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China Foundry 2025年第1期22卷 75-82页

作者： Lin-fei xia Wen-bo Li Zuo-shan Wei Yu-ying Wu xiang-fa Liu China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong UniversityJinan 250061China Shandong Key Laboratory of Advanced Aluminum Materials and Technology Binzhou Institute of TechnologyBinzhou 256600ShandongChina

Near-eutectic Al-Si alloys are widely used in automotive manufacturing due to their superior wear resistance and high temperature *** of high Si content,the grain refinement of near-eutectic Al-Si alloy has been a problem for many *** this study,the effect of deep cryogenic treatment(DCT)on the microstructure and mechanical properties of Al-12Si-4Cu-2Ni-Mg alloy with addition of Al-Ti-C-B master alloy was fully *** show that the average grain size of the alloy is greatly reduced from 0.92 mm to 0.50 mm,and the eutectic Si and Al7Cu4Ni precipitates are spheroidized and refined in Al-12Si-4Cu-2Ni-Mg after DCT for 24 h and aging *** these changes of microstructures result in a significant increment of about 22.5%in elongation and a slight enhancement of about 6.8%in tensile ***,the refinement of microstructure also significantly improves the fatigue life of the alloy.

关键词： deep cryogenic treatment near-eutectic Al-Si master alloy microstructure mechanical properties

甲壳类水产品致敏原及特异性免疫制品的研究进展

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食品工业科技 2025年第1期46卷 403-412页

作者：李梦思夏菲刘庆梅黄苏杰卢艺彬桓霏刘萌刘翼翔刘光明漳州职业技术学院食品工程学院福建漳州363000 集美大学海洋食品与生物工程学院福建省海洋功能食品工程技术研究中心厦门市海洋功能食品重点实验室福建厦门361021 厦门海洋职业技术学院福建厦门361100

甲壳类水产品是我国常见的致敏食物之一,除了规避致敏食物的摄入,目前仍无有效的根治方法。因此,致敏原的性质分析及防控技术方法的研究至关重要。本文针对甲壳类水产品致敏原,介绍了致敏原的免疫学特性与分子结构,归纳了致敏原的抗原表... 详细信息

甲壳类水产品是我国常见的致敏食物之一,除了规避致敏食物的摄入,目前仍无有效的根治方法。因此,致敏原的性质分析及防控技术方法的研究至关重要。本文针对甲壳类水产品致敏原,介绍了致敏原的免疫学特性与分子结构,归纳了致敏原的抗原表位,探讨了应用于致敏原特异性治疗的免疫制品,比较了不同免疫制品的作用机理及优缺点,可为研发水产品过敏的防控技术方法提供参考。

关键词：甲壳类水产品致敏原分子结构抗原表位特异性免疫制品

Recovery of copper from copper slag using a microbial fuel cell and characterization of its electrogenesis

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International Journal of Minerals,Metallurgy and Materials 2017年第6期24卷 621-626页

作者： Wei-ping Liu xia-fei Yin School of Chemistry and Environment Engineering Jiangsu University of Technology School of Environment and Civil Engineering Jiangnan University

The microbial fuel cell, which can convert the chemical energy of organic matter into electricity via the catalytic action of microorganisms, is a novel environmentally friendly technology for wastewater treatment and energy generation. The electrical energy generated by the microbial fuel cell can be used as an alternative to a traditional external power source required to extract copper via electrolytic treatment. A dual-chamber microbial fuel cell(DMFC) for the treatment of copper slag sulfuric acid leach liquor was constructed. The electrogenesis performance of the DMFC and its ability to extract copper from the copper slag leachate were investigated. The results demonstrated that the maximum voltage was 540 mV when the DMFC achieved steady-state operation. The removal rate of copper ions was greater than 80.0%, and the maximum value was 92.1%. Moreover, X-ray diffraction and scanning electron microscopy were used to characterize the cathodal products. The results showed that the product deposited onto the cathode was copper and that its morphology was similar to that of the electrolytic copper powder. The DMFC can generate electricity and recover copper from copper slag simultaneously.

关键词： microbial fuel cells copper slag recovery copper electrogenesis

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乡村振兴背景下的城乡规划协同机制探讨

山西建筑 2025年第4期51卷 33-35,75页

作者：夏斐方文华上饶市广丰区城乡规划研究中心江西上饶334000

乡村振兴战略的实施为城乡规划协同发展提供了新的契机和挑战。基于乡村振兴的背景,从规划体系不完善、部门协调不足、公众参与度低等深入分析了当前城乡规划协同机制存在的问题,通过案例分析和实地调研,提出了完善法律法规、建立跨部... 详细信息

乡村振兴战略的实施为城乡规划协同发展提供了新的契机和挑战。基于乡村振兴的背景,从规划体系不完善、部门协调不足、公众参与度低等深入分析了当前城乡规划协同机制存在的问题,通过案例分析和实地调研,提出了完善法律法规、建立跨部门协调平台、引入智能化管理等优化措施。结果表明,建立健全的城乡规划协同机制对于促进城乡融合发展、实现乡村振兴具有重要意义。

关键词：乡村振兴城乡规划协同机制城乡融合可持续发展

Harmonic Transfer Function Based Single-input Single-output Impedance Modeling of LCC-HVDC Systems

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Journal of Modern Power Systems and Clean Energy 2024年第4期12卷 1327-1332页

作者： Yang Wang fei xia Ying Wang xianyong xiao College of Electrical Engineering Sichuan UniversityChengdu 610065China

This study presents a harmonic transfer function(HTF)based single-input single-output(SISO)impedance modeling *** method converts an HTF from phase domain to sequence domain and then transforms it into an SISO impedance while preserving the frequency coupling information of different sequences and different *** of this method to a line-commutated converter based high-voltage direct current(LCC-HVDC)system are *** results demonstrate the accuracy of the derived SISO impedance,and a truncation-order selection is *** case study shows that the proposed method facilitates simpler impedance measurements and associated stability analysis.

关键词： Line-commutated converter based high-voltage direct current(LCC-HVDC) harmonic transfer function(HTF) single-input single-output(SISO)impedance frequency coupling

Potential sediment sources identification of debris flows in the Jiangjia Gully,China

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Journal of Mountain Science 2021年第7期18卷 1886-1901页

作者： TIAN xia-fei LI Yong TIAN Quan-yan Key Laboratory of Mountain Hazards and Surface Process Chinese Academy of SciencesChengdu 610041China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 73000China

It is of great significance for gully prevention and management to identify the potential sediment source of debris *** flow in a gully always originates from tributaries that have different gravity potential energies and sediment *** this study,tributaries of the Jiangjia Gully(JJG) in Yunnan province,China,are taken as the study area to determine the possible sediment sources of debris *** was found that tributaries with a high evolution index(EI,the integral of the hypsometric curve) always had high gravity potential energy,which favors the occurrence of landslide ***,the relationship between sediment distribution,gravity potential energy,and EI is compared,*** results showed that the EI had a greater influence on the occurrence of landslides,and sediments were concentrated in tributaries with EI between 0.5 and ***,tributaries with EI > 0.5 were identified as the sediment sources of debris *** addition,the shape of a tributary was related to EI and can reflect the condition of water and sediment storage.

关键词： Hypsometric curve Evolution division Gravity potential energy curve Landslides Identification Debris flow

Fog removal and enhancement method for UAV aerial images based on dark channel prior

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Journal of Control and Decision 2023年第2期10卷 188-197页

作者： fei xia Hu Song Haoxiang Dou Information Operation Inspection Center State Grid Jiangsu Information&Telecommunication CompanyNanjingPeople’s Republic of China

The existing UAV aerial image de-fog methods have low image contrast after de-fog,the difference between light and dark image is not obvious,leading to poor de-fog ***,an aerial image de-fog enhancement method based on dark channel a priori is *** image variance and absolute gradient mean are combined to get the weight coefficients,and the edge pixels are smoothed by using the multiple decomposition *** image intensity is calculated and the noise is reduced.A convolution neural network is introduced to calculate the atmospheric transmittance in *** on this,dark channel prior algorithm is used to enhance the light and shade difference of aerial photography image and realise the de-fog enhancement of aerial photography *** verify the performance of the proposed method,simulation experiments are designed which were compared with the existing methods results in better fog-removing effect,higher contrast and shorter time.

关键词： Dark channel prior unmanned aerial vehicle(UAV) aerial image fog enhancement halo artefact image denoising

Study on the model of an insurer's solvency ratio in Markov-modulated Brownian markets

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Applied Mathematics(A Journal of Chinese Universities) 2011年第1期26卷 23-28页

作者： xia Deng-feng fei Wei-yin LIANG Yong School of Mathematics and Physics Anhui Polytechnic University Wuhu 241000 China

In this paper the insurer＇s solvency ratio model with or without jump diffusion process in the presence of financial distress cost is constructed, where an insurer＇s solvency ratio is characterized by a Markov-modulated dynamics. By Girsanov＇s theorem and the option pricing formula, the expected present value of shareholders＇ terminal payoff is provided.

关键词： Markov-modulated market jump diffusion process solvency ratio Girsanov's theorem financialdistress cost.

A new test on the conditional capital asset pricing model

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Applied Mathematics(A Journal of Chinese Universities) 2015年第2期30卷 163-186页

作者： LI xia-fei CAI Zong-wu REN Yu Wang Yanan Institute for Studies in Economics The MOE Key Lab of Econometrics and Fujian Key Lab of Statistical Sciences Xiamen University Department of Economics University of Kansas

Testing the validity of the conditional capital asset pricing model （CAPM） is a puzzle in the finance literature. Lewellen and Nagel[14] find that the variation in betas and in the equity premium would have to be implausibly large to explain important asset-pricing anomalies. Unfortunately, they do not provide a rigorous test statistic. Based on a simulation study, the method proposed in Lewellen and Nagel[14] tends to reject the null too frequently. We develop a new test procedure and derive its limiting distribution under the null hypothesis. Also, we provide a Bootstrap approach to the testing procedure to gain a good finite sample performance. Both simulations and empirical studies show that our test is necessary for making correct inferences with the conditional CAPM.

关键词： Asset pricing model bootstrap test conditional CAPM large sample theory

Vertical dynamic response of the ballastless track on long-span plate-truss cable-stayed bridges

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Science China(Technological Sciences) 2015年第2期58卷 236-247页

作者： LI Yong Le SU Yang xia fei Long ZHANG Nan Department of Bridge Engineering Southwest Jiaotong University MOE Key Laboratory of High Speed Railway Engineering Southwest Jiaotong University Department of Bridge Engineering Northern Jiaotong University

An analytical model is presented to study vertical dynamic response of the ballastless track on long-span plate-truss cable-stayed bridges based on an explicit dynamic analysis *** the model,the train,ballastless track and bridge are treated as a coupled vibration system with *** simulating the dynamic process of the system,this paper discusses the distribution law of dynamic responses of the bridge deck and the bed *** shows the necessity of a base plate for the ballastless track on the long-span plate-truss cable-stayed *** of the influence of different train speeds and stiffness of the elastic vibration-damping pad on the dynamic responses of the bridge deck and the bed slab is also *** reasonable stiffness value of elastic vibration-damping pad is proposed.

关键词： long-span cable-stayed bridge plate-truss girder ballastless track train-induced vibration vehicle-bridge system