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超高压结合壳聚糖涂膜处理对鲜切胡萝卜丝品质的影响

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食品研究与开发 2024年第9期45卷 30-35页

作者：陈燕毕秀芳代雨杉黄瑞车振明西华大学食品与生物工程学院四川成都610039 宜宾西华大学研究院四川宜宾644000

为研究壳聚糖(chitosan,CTS)、超高压(high pressure processing,HPP)单独及结合处理(CTS+HPP)对鲜切胡萝卜丝品质的影响,将鲜切胡萝卜丝经3种方式处理后,置于4℃条件下贮藏12 d,以探究其贮藏品质的变化。结果显示,贮藏第0天时,与对照... 详细信息

为研究壳聚糖(chitosan,CTS)、超高压(high pressure processing,HPP)单独及结合处理(CTS+HPP)对鲜切胡萝卜丝品质的影响,将鲜切胡萝卜丝经3种方式处理后,置于4℃条件下贮藏12 d,以探究其贮藏品质的变化。结果显示,贮藏第0天时,与对照组相比,CTS、HPP和CTS+HPP处理组的菌落总数分别减少了40.9%、2.8%和46.9%;呼吸强度分别降低了23.8%、11.2%和13.0%;硬度分别降低了11.6%、14.4%和28.6%;类胡萝卜素分别增加了80.9%、27.3%和49.5%。贮藏第9天时,与对照组相比,CTS、HPP和CTS+HPP处理组的菌落总数分别减少了31.0%、2.7%和50.1%;类胡萝卜素含量分别增加了186.5%、45.4%和57.4%;CTS组的失重率减少了1.7%,而HPP和CTS+HPP处理组的失重率增加了73.5%和50.4%。结果表明CTS、HPP和CTS+HPP处理均能显著地抑制鲜切胡萝卜丝菌落总数的增长、抑制呼吸强度、延缓类胡萝卜素含量下降。与HPP处理相比,CTS+HPP处理显著抑制菌落总数的增长,延缓类胡萝卜素、可溶性固形物含量和硬度的下降(P<0.05)。在4℃下贮藏9 d后,CTS处理组保鲜效果显著优于其他处理组,可有效维持鲜切胡萝卜丝硬度,保持可溶性固形物和类胡萝卜素含量。综合考虑微生物和品质变化,CTS处理对鲜切胡萝卜丝的品质影响较小,有效地延缓鲜切胡萝卜丝的类胡萝卜素、可溶性固形物含量和硬度的下降,从而延长鲜切胡萝卜丝的贮藏期。

关键词：鲜切胡萝卜壳聚糖超高压果蔬保鲜非热加工技术

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三钢铁矿石高温基础特性评价与研究

冶金能源 2024年第4期43卷 28-32页

作者：戴玉山周文波黄建强刘征建李思达福建三钢闽光股份有限公司烧结厂北京科技大学冶金与生态工程学院

为保证烧结高效稳定生产,针对三钢常用的八种铁矿粉的高温基础性能进行了相关研究。研究结果表明,矿种和铁氧化物赋存形态的不同均会影响到矿粉的高温基础性能,A 1矿粉内部褐铁矿含量较高,高温反应性较好,最低同化温度较低;磁铁矿粉的... 详细信息

为保证烧结高效稳定生产,针对三钢常用的八种铁矿粉的高温基础性能进行了相关研究。研究结果表明,矿种和铁氧化物赋存形态的不同均会影响到矿粉的高温基础性能,A 1矿粉内部褐铁矿含量较高,高温反应性较好,最低同化温度较低;磁铁矿粉的最低同化温度都达到了1300℃以上,液相生成能力和流动能力都较好,尤其B 1液相流动性指数达到了5.59,各铁矿粉之间存在烧结互补特性。研究铁矿石的高温基础特性为优化烧结配矿提供了技术依据,基于检测结果,确定了矿粉配比为外购富矿粉∶国内精矿粉=8∶2,后续可根据性价比对配比进行微调。

关键词：铁矿石烧结高温基础特性同化性能液相流动性烧结优化配矿

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超厚料层烧结水碳结构优化研究

冶金能源 2024年第2期43卷 3-6,14页

作者：戴玉山胡文祥王义惠周文波王耀祖李思达福建三钢闽光股份有限公司北京科技大学人工智能研究院北京科技大学冶金与生态工程学院

为保证料层厚度由600 mm提高至1000 mm后,烧结生产稳定顺行,通过烧结杯实验,研究了料层厚度及水碳结构对料层透气性和烧结矿质量的影响。优化后烧结产能及质量得到改善,垂烧速度、转鼓指数和整体利用系数由15.2 mm/min、65.0%和1.23 t/(... 详细信息

为保证料层厚度由600 mm提高至1000 mm后,烧结生产稳定顺行,通过烧结杯实验,研究了料层厚度及水碳结构对料层透气性和烧结矿质量的影响。优化后烧结产能及质量得到改善,垂烧速度、转鼓指数和整体利用系数由15.2 mm/min、65.0%和1.23 t/(m^(2)·h)提高至22.3 mm/min、68.9%和1.54 t/(m^(2)·h)。确认了现场烧结原料结构下的最佳配水量为7.5%,同时不降低固体燃料用量,为超厚料层烧结稳定生产提供了数据指导。

关键词：铁矿石烧结水碳结构厚料层烧结烧结矿质量

AFM probe with the U-shaped cross-sectional cantilever for measuring the ultra-low coefficient of friction of 10^(–6)

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Friction 2024年第8期12卷 1707-1715,F0004页

作者： yushan CHEN Liang JIANG Linmao QIAN Tribology Research Institute State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China

Accurately measuring the coefficient of friction(COF)is the fundamental prerequisite of superlubricity *** study aimed to reduce the COF measurement resolutionΔμof atomic force microscopy(AFM).Based on the theoretical model,a distinctive strategy was adopted to reduceΔμby optimizing the cantilever’s cross-section of the AFM probe,inspired by civil engineering.Δμcan be reduced by decreasing the width of the horizontal side wR and the wall thickness t and increasing the width of the vertical side ***,the I-shape demonstrates the highest reduction inΔμ,followed by the *** the processability,the AFM probe with the U-shaped cross-sectional cantilever was investigated further,and the dimensions are 35μm wR,3.5μm wH,0.5μm t,50μm l(cantilever length),and 23μm htip(tip height).The finite element analysis results confirm its *** being fabricated and calibrated,the AFM probe achieves the minimalΔμof 1.9×10^(–6)under the maximum normal force so ***,the friction detection capability of the fabricated AFM probe improves by 78 times compared to the commercial tipless-force modulation mode(TL-FM)AFM probe with the conventional solid rectangular cross-sectional *** study provides a powerful tool for measuring 10^(–6)COF.

关键词： atomic force microscopy superlubricity coefficient of friction probe cantilever

AFM probe for measuring~10^(−5)ultra-low friction coefficient:Design and application

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Friction 2024年第1期12卷 64-73页

作者： yushan CHEN Liang JIANG Linmao QIAN Tribology Research Institute State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China

Superlubricity provides a novel approach to addressing friction and wear issues in mechanical ***,little is known regarding improving the atomic force microscope(AFM)friction coefficient measurement ***,this study established the theoretical formula for the AFM friction coefficient measurement and deduced the measurement ***,the formula was applied to the AFM probe with a rectangular cross-section *** measurement resolution is associated with the dimensional properties of the AFM probe,the mechanical properties of the cantilever material,the properties of the position-sensitive detector(PSD),and probably the anti-vibration performance of the *** is feasible to make the cantilever as short as possible and the tip as high as possible to improve the measurement *** AFM probe for measuring an ultra-low friction coefficient was designed and *** cantilever’s length,width,and thickness are 50,35,and 0.6μm,*** tip height is 23μ*** measurement resolution can reach 7.1×10^(−6) under the maximum normal ***,the AFM probe was applied to measure the superlubricity between graphene *** friction coefficient is 0.00139 under 853.08 *** work provides a promising method for measuring a~10^(−5) friction coefficient of superlubricity.

关键词： atomic force microscope(AFM) superlubricity friction coefficientμ probe

Artificial synapses based on organic electrochemical transistors with self-healing dielectric layers

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Chinese Chemical Letters 2024年第3期35卷 423-427页

作者： yushan Gao Junyao Zhang Dapeng Liu Tongrui Sun Jun Wang Li Li Shilei dai Jianhua Zhang Zhenglong Yang Jia Huang School of Materials Science and Engineering Tongji UniversityShanghai 201804China Key Laboratory of Advanced Display and System Application Ministry of EducationShanghai UniversityShanghai 200072China National Key Laboratory of Autonomous Intelligent Unmanned Systems Tongji UniversityShanghai 201804China

Organic electrochemical transistors(OECTs)have emerged as one type of promising building block for neuromorphic systems owing to their capability of mimicking the morphology and functions of biological neurons and ***,numerous kinds of OECTs have been developed,while self-healing performance has been neglected in most reported *** this work,the OECTs using self-healing polymer electrolytes as dielectric layers are *** important synaptic behaviors are simulated in the OECTs by doping the channel layers with ions from the *** from the dynamic hydrogen bonds in the self-healing polymer electrolytes,the OECTs can successfully maintain their electrical performance and the ability of emulating synaptic behaviors after self-healing compared with the initial *** significantly,the sublinear spatial summation function is demonstrated in the OECTs and their potential in flexible electronics is also *** results suggest that our devices are expected to be a vital component in the development of future wearable and bioimplantable neuromorphic systems.

关键词： Organic electrochemical transistors Artificial synapses Synaptic behaviors Self-healing Flexibility

Alternative Method of Constructing Granular Neural Networks

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Computers, Materials & Continua 2024年第4期79卷 623-650页

作者： yushan Yin Witold Pedrycz Zhiwu Li School of Electro-Mechanical Engineering Xidian UniversityXi’an710071China Department of Electrical and Computer Engineering University of AlbertaEdmontonABT6R 2V4Canada

Utilizing granular computing to enhance artificial neural network architecture, a newtype of network emerges—thegranular neural network (GNN). GNNs offer distinct advantages over their traditional counterparts: The ability toprocess both numerical and granular data, leading to improved interpretability. This paper proposes a novel designmethod for constructing GNNs, drawing inspiration from existing interval-valued neural networks built uponNNNs. However, unlike the proposed algorithm in this work, which employs interval values or triangular fuzzynumbers for connections, existing methods rely on a pre-defined numerical network. This new method utilizesa uniform distribution of information granularity to granulate connections with unknown parameters, resultingin independent GNN structures. To quantify the granularity output of the network, the product of two commonperformance indices is adopted: The coverage of numerical data and the specificity of information *** this combined performance index helps determine the optimal parameters for the network. Finally,the paper presents the complete model construction and validates its feasibility through experiments on datasetsfrom the UCIMachine Learning Repository. The results demonstrate the proposed algorithm’s effectiveness andpromising performance.

关键词： Granular neural network granular connection interval analysis triangular fuzzy numbers particle swarm optimization(PSO)

Developing risk models and subtypes of autophagy-associated LncRNAs for enhanced prognostic prediction and precision in therapeutic approaches for liver cancer patients

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Oncology Research 2024年第4期32卷 703-716页

作者： LU ZHANG JINGUO CHU yushan YU Department of General Practice The First Affiliated Hospital of Ningbo UniversityNingboChina

Background:Limited research has been conducted on the influence of autophagy-associated long non-coding RNAs(ARLncRNAs)on the prognosis of hepatocellular carcinoma(HCC).Methods:We analyzed 371 HCC samples from TCGA,identifying expression networks of ARLncRNAs using autophagy-related *** for prognostically relevant ARLncRNAs involved univariate Cox regression,Lasso regression,and multivariate Cox regression.A Nomogram was further employed to assess the reliability of Riskscore,calculated from the signatures of screened ARLncRNAs,in predicting ***,we compared drug sensitivities in patient groups with differing risk levels and investigated potential biological pathways through enrichment analysis,using consensus clustering to identify subgroups related to ***:The screening process identified 27 ARLncRNAs,with 13 being associated with HCC ***,a set of signatures comprising 8 ARLncRNAs was successfully constructed as independent prognostic factors for *** in the high-risk group showed very poor prognoses in most clinical *** Riskscore was closely related to immune cell scores,such as macrophages,and the DEGs between different groups were implicated in metabolism,cell cycle,and mitotic ***,high-risk group patients demonstrated a significantly lower IC50 for Paclitaxel,suggesting that Paclitaxel could be an ideal treatment for those at elevated risk for *** further identified C2 as the Paclitaxel subtype,where patients exhibited higher Riskscores,reduced survival rates,and more severe clinical ***:The 8 signatures based on ARLncRNAs present novel targets for prognostic prediction in *** drug candidate Paclitaxel may effectively treat HCC by impacting ARLncRNAs *** the identification of ARLncRNAsrelated isoforms,these results provide valuable insights for clinical exploration of autophagy mechanisms in HCC pathogenesis and offer potential av

关键词： Autophagy Hepatocellular carcinoma(HCC) Prognosis Precision medicine Paclitaxel

Two material removal modes in chemical mechanical polishing:mechanical plowing *** bonding

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Friction 2024年第5期12卷 897-905页

作者： Yuan WU Liang JIANG Wenhui LI Jiaxin ZHENG yushan CHEN Linmao QIAN Tribology Research Institute State Key Laboratory of Rail Transit Vehicle SystemSouthwest Jiaotong UniversityChengdu610031China

With the rapid development of semiconductors,the number of materials needed to be polished sharply *** material properties vary significantly,posing challenges to chemical mechanical polishing(CMP).Accordingly,the study aimed to classify the material removal *** on the CMP and atomic force microscopy results,the six representative metals can be preliminarily classified into two groups,presumably due to different material removal *** the tribology perspective,the first group of Cu,Co,and Ni may mainly rely on the mechanical plowing *** adding H_(2)O_(2),corrosion can be first enhanced and then suppressed,affecting the surface mechanical ***,the material removal rate(MRR)and the surface roughness increase and *** comparison,the second group of Ta,Ru,and Ti may primarily depend on the chemical bonding *** H_(2)O_(2)can promote oxidation,increasing interfacial chemical ***,the MRR increases,and the surface roughness decreases and levels *** addition,CMP can be regulated by tuning the synergistic effect of oxidation,complexation,and dissolution for mechanical plowing,while tuning the synergistic effect of oxidation and ionic strength for chemical *** findings provide mechanistic insight into the material removal mechanism in CMP.

关键词： Chemical mechanical polishing corrosion wear material removal mode mechanical plowing chemical bonding