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Changes in chemical composition,structural and functional microbiome during alfalfa(Medicago sativa)ensilage with Lactobacillus plantarum PS-8

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Animal Nutrition 2022年第2期9卷 100-109页

作者： Lijun You weichen bao Caiqing Yao Feiyan Zhao Hao Jin Weiqiang Huang Bohai Li Lai-Yu Kwok Wenjun Liu Key Laboratory of Dairy Biotechnology and Engineering Ministry of EducationKey Laboratory of Dairy Products ProcessingMinistry of Agriculture and Rural AffairsInner Mongolia Agricultural UniversityHohhot010018China

Improving silage production by adding exogenous microorganisms not only maximizes nutrient preservation,but also extends product shelf ***,changes in the quality and quantity of Lactobacillus plantarum PS-8(PS-8)-inoculated alfalfa(Medicago sativa)during silage fermentation were monitored at d 0,7,14,and 28(inoculum dose of PS-8 was 1105 colony forming units[cfu]/g fresh weight;50 kg per bag;10 bags for each time point)by reconstructing metagenomic-assembled genomes(MAG)and Growth Rate InDex(GRiD).Our results showed that the exogenous starter bacterium,PS-8 inoculation,became the most dominating strain by d 7,and possibly played a highly active role throughout the fermentation *** pH value of the silage decreased greatly,accompanied by the growth of acidproducing microorganisms namely PS-8,which inhibited the growth of harmful microorganisms like molds(4.18 vs.1.42 log cfu/g)and coliforms(4.95 vs.0.66 log most probable number[MPN]/g).The content of neutral detergent fiber(NDF)decreased significantly(41.6%vs.37.6%;dry matter basis).In addition,the abundance and diversity of genes coding microbial carbohydrate-active enzymes(CAZymes)increased significantly and desirably throughout the fermentation,particularly the genes responsible for degrading starch,arabino-xylan,and ***,our results showed that PS-8 was replicating rapidly and consistently during early-and mid-fermentation phases,promoting the growth of beneficial lactic acid bacteria and inhibiting undesirable microbes,ultimately improving the quality of silage.

关键词： Lactobacillus plantarum PS-8 Alfalfa silage Lactic acid bacteria Microbiota community Metagenomic-assembled genome

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三维编织复合材料中碳纳米管纱线嵌入位置和数量的优化配置

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纺织学报 2021年第9期42卷 76-82页

作者：万振凯贾敏瑞包玮琛天津工业大学工程教学中心天津300387 天津工业大学纺织科学与工程学院天津300387

为解决三维编织复合材料嵌入碳纳米管(CNT)纱线传感器优化配置目标多、目标函数不连续问题,实现航天结构制件内部损伤的全面监测,采用非支配邻域免疫算法对多目标优化问题进行了研究。以四步法三维六向编织工艺为依据,分析了CNT纱线传... 详细信息

为解决三维编织复合材料嵌入碳纳米管(CNT)纱线传感器优化配置目标多、目标函数不连续问题,实现航天结构制件内部损伤的全面监测,采用非支配邻域免疫算法对多目标优化问题进行了研究。以四步法三维六向编织工艺为依据,分析了CNT纱线传感器的最佳嵌入位置和数量;通过非支配邻近免疫算法实现了CNT纱线传感器优化配置问题的求解,推导出不同尺寸的三维编织复合材料制件嵌入传感器的最优数量和位置。对损伤制件的应力实验及数据分析证明,CNT纱线传感器优化配置结果适用于三维编织复合材料的损伤监测,损伤定位误差小于0.6 mm。该研究为复合材料损伤源定位模型的建立提供参考。

关键词：碳纳米管纱线非支配邻域免疫算法传感器优化配置损伤定位源三维编织复合材料

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多种群协同进化算法优化的云存储仿真分析

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电子测试 2017年第5X期28卷 40-41,48页

作者：包玮琛重庆航天职业技术学院重庆400021

云平台下大数据的极速增长,使得传统的数据存储由于时间响应慢、负载不均衡等因素,成为阻碍大数据云存储的关键技术,为了解决云平台下大数据的存储问题,提出了多种群协同进化优化算法的存储方法。该方法首先将存储分布区分割成若干个环... 详细信息

云平台下大数据的极速增长,使得传统的数据存储由于时间响应慢、负载不均衡等因素,成为阻碍大数据云存储的关键技术,为了解决云平台下大数据的存储问题,提出了多种群协同进化优化算法的存储方法。该方法首先将存储分布区分割成若干个环区域,同时标记每个存储区的存储访问时间,然后将大数据的存储访问抽象为最优解问题。通过改进协同进化算法,防止粒子群早熟,采用该优化算法对大数据存储过程中的任务调度粒子群分别编码,根据微粒群不断进化和变异,迭代得到最优解,从而满足云平台下大数据存储的实际需求。利用Cloudsim搭建仿真平台,对提出的新型大数据存储方法加以评估验证,结果表明该方法不仅具有更快的响应速度,而且降低了系统能耗,提高了负载均衡度。

关键词：大数据云存储多种群协同进化微粒群

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基于碳纳米线传感器的三维六向编织复合材料内部损伤定位

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纺织学报 2017年第8期38卷 68-74页

作者：万振凯张志钢贾敏瑞包玮琛董卿霞天津工业大学信息化中心天津300387

为研究三维编织复合材料的实时结构健康状态监控,针对三维六向编织复合材料编织结构,采用三维四步六向编织方法将碳纳米线传感器以轴向纱和六向纱形式嵌入复合材料中,提出了一种构建智能三维复合材料的方法,建立了基于碳纳米线的三维编... 详细信息

为研究三维编织复合材料的实时结构健康状态监控,针对三维六向编织复合材料编织结构,采用三维四步六向编织方法将碳纳米线传感器以轴向纱和六向纱形式嵌入复合材料中,提出了一种构建智能三维复合材料的方法,建立了基于碳纳米线的三维编织复合材料试件内部损伤监测系统。基于碳纳米线测量的电阻值矩阵,采用四分矩阵奇异值分解方法分析信号矩阵的主要特征,计算试件内部的损伤准确位置。实验采用5种不同类型损伤试件进行分析,结果表明,该方法计算的试件内部损伤位置与实际损伤一致,测量的损伤位置坐标误差小于1。该研究可为智能三维编织复合材料的健康监测发展提供理论基础。

关键词：三维六向编织复合材料碳纳米线传感器内部缺陷无损检测奇异值分解

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改进压缩感知算法的图像处理仿真研究

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电子测试 2017年第6期28卷 47-48页

作者：包玮琛王剑峰重庆航天职业技术学院重庆400021

图像分块处理能够有效降低计算过程的复杂程度,减少图像文件所占的空间大小,然而这也导致了块效应的产生,以及由于噪声导致的重构处理后图像的质量损失。为此,提出了改进压缩感知算法的图像处理方法。该方法首先对块效应的出现进行剖析... 详细信息

图像分块处理能够有效降低计算过程的复杂程度,减少图像文件所占的空间大小,然而这也导致了块效应的产生,以及由于噪声导致的重构处理后图像的质量损失。为此,提出了改进压缩感知算法的图像处理方法。该方法首先对块效应的出现进行剖析,然后采用压缩感知算法对图像进行分块迭代处理,设计了一种新型权重滤波方法,融合了二次滤波,优化了常规自适应滤波算法。通过仿真对比验证,本文提出的新型图像处理方法能够对图像纹理细节进行有效处理,明显提高了图像的处理质量。

关键词：压缩感知图像处理图像纹理滤波

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凝结芽孢杆菌的益生特性及机制研究进展

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食品工业科技 2023年第1期44卷 458-464页

作者：王一帆岑丛楠刘福奇包维臣傅玲琳王彦波浙江工商大学食品与生物工程学院浙江杭州310018 浙江工商大学实验室与资产管理处浙江杭州310018 金华银河生物科技有限公司浙江金华321000

凝结芽孢杆菌作为益生菌,近年来因其特有的益生特性备受关注。鉴于此,在深度解析凝结芽孢杆菌益生特性的基础上,结合目前国内外的研究现状和未来发展趋势,从消化道微生态、营养物质的消化吸收和免疫系统三方面揭示了凝结芽孢杆菌在食品... 详细信息

凝结芽孢杆菌作为益生菌,近年来因其特有的益生特性备受关注。鉴于此,在深度解析凝结芽孢杆菌益生特性的基础上,结合目前国内外的研究现状和未来发展趋势,从消化道微生态、营养物质的消化吸收和免疫系统三方面揭示了凝结芽孢杆菌在食品领域的应用机制,并展望了未来在本领域的研究热点,旨在为凝结芽孢杆菌在食品工业中的广泛应用提供支撑,助力益生菌产业的可持续发展。

关键词：凝结芽孢杆菌益生特性益生菌机制

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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang Xuheng Chen Junfang bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

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Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

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Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing Wang Wei Pi Sheng Hu Haifeng bao Na Yao Wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

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Posttraumatic stress symptoms among Chinese university students during the COVID-19 pandemic:Prevalence,correlates,and mental health help-seeking

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World Journal of Psychiatry 2025年第1期15卷 145-152页

作者： Rui-Yao Wu Lin-Feng Ge bao-Liang Zhong Department of Psychiatry The Affiliated Wuhan Mental Health CenterTongji Medical College of Huazhong University of Science&TechnologyWuhan 430012Hubei ProvinceChina Department of Psychiatry Wuhan Mental Health CenterWuhan 430012Hubei ProvinceChina

BACKGROUND Revisiting the epidemiology of posttraumatic stress symptoms(PTSSs)among university students during the coronavirus disease 2019(COVID-19)pandemic as well as understanding the mental health help-seeking behavior of individuals with PTSSs has critical implications for public mental health strategies in future medical *** To investigate the prevalence and correlates of PTSSs among university students during the first wave of the COVID-19 pandemic in China and to examine mental health help-seeking behaviors among these *** A total of 2507 Chinese university students were recruited via snowball *** students completed the Seven-item Screening Scale for Post-traumatic Stress Disorder during the first wave of the COVID-19 pandemic in ***-graphic characteristics,pandemic-related characteristics,and mental health help-seeking behaviors of students with PTSSs were also *** The prevalence of PTSSs among the participants was 28.0%.Seven significant correlates of PTSSs were identified(odds ratio=1.23-3.65,P≤0.024):Female sex,being 19 years old or older,living with others or alone,a low level of family economic status,fair or poor interpersonal relationships,severe or very severe local pandemic,and having family members diagnosed with ***,only 3.28%of the students with PTSSs reported seeking help from mental health *** the 23 students who sought help from mental health specialists,13 opted for online or telephone-based psychological *** Our data suggest that there was a high risk of PTSSs among university students and a high level of unmet mental health needs during the COVID-19 *** delivery of mental health services online or via telephone is a promising approach to address these unmet needs.

关键词： Posttraumatic stress symptoms University students COVID-19 Mental health help-seeking China

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De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2025年第01期 174-180页

作者： Fan-Xiao Meng Xing-Yu Wang Ka Lu Ju-Song Yang Fu-Min Zhang Ai-Jun Ma bao Du Yong-Qiang Tu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University School of Biotechnology and Health Sciences Wuyi University

Herein, the de novo synthesis of atropisomeric benzofurans through the Cu/spirocyclic-pyrrolidine-oxazoline(SPDO) complex catalyze asymmetric formal [3 + 2] cycloaddition between quinones and ynamides is explored, producing a range of structurally diverse axially chiral benzofurans in satisfactory yields with good to excellent enantioselectivities. Furthermore, density functional theory calculations were applied to explain the possible reaction mechanism.

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