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低冷量下强化CO_(2)吸收的甲醇基纳米流体性能

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化工进展 2024年第5期43卷 2811-2822页

作者：武西宁张宁秦佳敏徐龙魏朝阳马晓迅西北大学化工学院碳氢资源清洁利用国际科技合作基地陕北能源先进化工利用技术教育部工程研究中心陕西省洁净煤转化工程技术研究中心陕北能源化工产业发展协同创新中心陕西西安710127

冷甲醇洗法捕集CO_(2)技术要求低温环境,需要大量的冷冻能量,能耗较大。在吸收剂中引入纳米颗粒,可以有效提高气液传质速率,降低能耗。本研究旨在开发冷量需求少,吸收、解吸性能提升的甲醇基纳米流体。实验分别考察了纳米颗粒种类、固... 详细信息

冷甲醇洗法捕集CO_(2)技术要求低温环境,需要大量的冷冻能量,能耗较大。在吸收剂中引入纳米颗粒,可以有效提高气液传质速率,降低能耗。本研究旨在开发冷量需求少,吸收、解吸性能提升的甲醇基纳米流体。实验分别考察了纳米颗粒种类、固含量、尺寸,表面活性剂含量、操作温度和初始CO_(2)浓度等因素对吸收剂捕集CO_(2)性能的影响及机理。结果表明,在0.2~1.0g/L的TiO_(2)、Al_(2)O_(3)、SiO_(2)纳米流体中,0.4g/L的TiO_(2)-甲醇纳米流体的CO_(2)吸收、解吸增强效果最佳。向其中添加0.10%(质量分数)聚乙二醇辛基苯基醚(Triton X-100)后,纳米流体的吸收、解吸增强效果达到最大,且在5次循环后仍呈现良好增强效果。此外,本文对纳米流体增强吸收的机理进行了深入分析,提出了一个经验公式来预测TiO_(2)-甲醇纳米流体的增强因子E和最佳固含量。

关键词：二氧化碳捕集鼓泡反应器模型纳米流体低冷量供给传质增强

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级联离散小波多频带分解注意力图像去噪方法

计算机应用研究 2024年第1期41卷 288-295页

作者：王力李小霞秦佳敏朱贺周颖玥西南科技大学信息工程学院四川绵阳621010 四川省工业自主可控人工智能工程技术研究中心四川绵阳621010 四川绵阳四0四医院四川绵阳621000

针对图像去噪网络中下采样导致高频信息损失和细节保留能力差的问题,设计了一种级联离散小波多频带分解注意力图像去噪网络。其中多尺度级联离散小波变换结构将原始图像分解为多个尺度下的高低频子带来代替传统下采样,能减少高频信息损... 详细信息

针对图像去噪网络中下采样导致高频信息损失和细节保留能力差的问题,设计了一种级联离散小波多频带分解注意力图像去噪网络。其中多尺度级联离散小波变换结构将原始图像分解为多个尺度下的高低频子带来代替传统下采样,能减少高频信息损失。多频带特征增强模块使用不同尺度的卷积核并行处理高低频特征,在子网络每一级下重复使用两次,可增强全局和局部的关键特征信息。多频带分解注意力模块通过注意力评估纹理细节成分的重要性并加权不同频带的细节特征,有助于多频带特征增强模块更好地区分噪声和边缘细节。多频带选择特征融合模块融合多尺度多频带特征增强选择性特征,提高模型对于不同尺度噪声的去除能力。在SIDD和DND数据集上,所提方法的PSNR/SSIM指标分别达到了39.35 dB/0.918、39.72 dB/0.955。实验结果表明,该方法的性能优于主流去噪方法,同时具有更清晰的纹理细节和边缘等视觉效果。

关键词：图像去噪高频信息级联离散小波变换多频带特征增强多频带分解注意力

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食道病灶检测的多尺度细节增强金字塔网络

计算机工程与应用 2024年第4期60卷 229-236页

作者：李驰周颖玥姚韩敏李小霞秦佳敏庄鸣文黎明西南科技大学信息工程学院四川绵阳621010 特殊环境机器人技术四川省重点实验室四川绵阳621010 四川绵阳四〇四医院四川绵阳621053

针对食道卢戈染色内窥镜(Lugol’s chromoendoscopy,LCE)检查图像中病变类间相似度高和类内尺度变化大等问题,提出了一种以Sparse R-CNN作为基底网络并搭载多尺度细节增强金字塔网络(multi-scale detail enhancement pyramid network,MD... 详细信息

针对食道卢戈染色内窥镜(Lugol’s chromoendoscopy,LCE)检查图像中病变类间相似度高和类内尺度变化大等问题,提出了一种以Sparse R-CNN作为基底网络并搭载多尺度细节增强金字塔网络(multi-scale detail enhancement pyramid network,MDEPN)结构的多类食道病灶检测方法。为了改善Sparse R-CNN中的特征金字塔网络(feature pyramid network,FPN)结构在对多尺度特征进行融合时存在的信息丢失和语义差异问题,MDEPN结构首先使用Gabor调制卷积模块对不同尺度特征进行增强,利用Gabor对方向和尺度的强关注度提高了特征图中纹理信息的表达能力;其次使用方向通道池化模块提取不同尺度特征的局部特征方向相似性和局部与全局特征的相关性,减轻了不同尺度特征融合时的语义差异。在自建的多类食道LCE病灶数据集上进行测试,结果表明该方法的mAP0.50检测精度达到了65.0%,相同条件下,比基准模型Sparse R-CNN提升了2.4个百分点,并超过了对比的其余主流检测方法。所设计的MDEPN模块可作为一种独立的结构融入其他检测模型中以提升性能,具有一定的通用性。

关键词：食道病变检测金字塔网络 Gabor调制卷积方向通道池化

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饲料蜂花粉灭菌对短头熊蜂工蜂群发育的影响

中国蜂业 2024年第1期75卷 57-62页

作者：赵必安展江秦加敏梁铖云南省农业科学院蚕桑蜜蜂研究所蒙自661101

为了探究饲料蜂花粉不同灭菌处理对熊蜂发育的影响,本试验采用同一来源的蜂花粉,设置对照组(Ⅰ:未灭菌)和4个灭菌处理组(Ⅱ:钴^(60)Co辐照、Ⅲ:臭氧O_(3)填充、Ⅳ:常压蒸汽加热、Ⅴ:60℃加热结合紫外线照射),分别饲喂短头熊蜂无王工蜂群... 详细信息

为了探究饲料蜂花粉不同灭菌处理对熊蜂发育的影响,本试验采用同一来源的蜂花粉,设置对照组(Ⅰ:未灭菌)和4个灭菌处理组(Ⅱ:钴^(60)Co辐照、Ⅲ:臭氧O_(3)填充、Ⅳ:常压蒸汽加热、Ⅴ:60℃加热结合紫外线照射),分别饲喂短头熊蜂无王工蜂群,记录蜂群发育动态和健康状况。结果表明,试验蜂群均能正常产卵,蜂群对灭菌组Ⅳ常压蒸汽加热的蜂花粉取食量(6.58±1.08 g)显著高于对照组和Ⅴ组(P0.05),始见雄蜂历时仅Ⅲ臭氧O_(3)填充组显著短于对照组(P<0.05);饲喂灭菌组蜂花粉的蜂群未见感染真菌的幼虫,对照组感染率为16.67%;Ⅱ钴^(60)Co辐照组和Ⅴ60℃加热结合紫外线照射组的雄性蜂初生重显著高于对照组(P<0.05)。说明钴^(60)Co辐照、O_(3)填充和低温加热结合紫外线照射灭菌能保证蜂花粉的安全和营养,用于饲养熊蜂可以降低蜂群染病风险,提高繁育效率,对本土短头熊蜂工厂化繁育具有重要意义。

关键词：短头熊蜂饲料辐照加热臭氧蜂群发育

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不同分度大肠黑变病伴发息肉的内镜特点分析

新医学 2024年第4期55卷 287-291页

作者：张雪秦佳敏文黎明西南医科大学临床医学院泸州646000 四川绵阳四〇四医院绵阳621000

目的探讨不同分度大肠黑变病(MC)伴发息肉的内镜特点。方法回顾性分析597例行结肠镜检查并诊断为MC患者的临床资料及内镜资料。分析不同分度MC与年龄、性别、伴发肠道疾病的相关性。并将不同分度MC合并息肉患者的性别、年龄、息肉大小... 详细信息

目的探讨不同分度大肠黑变病(MC)伴发息肉的内镜特点。方法回顾性分析597例行结肠镜检查并诊断为MC患者的临床资料及内镜资料。分析不同分度MC与年龄、性别、伴发肠道疾病的相关性。并将不同分度MC合并息肉患者的性别、年龄、息肉大小、息肉病理类型等进行统计学分析。结果Ⅰ度MC比Ⅱ、Ⅲ度MC更易检出合并息肉。不同分度MC合并息肉大小比较有统计学意义,其中0.05)。结论Ⅰ度MC更易检出息肉,Ⅲ度MC更易检出0.6~1.0 cm息肉,Ⅰ度MC更易检出增生性息肉,而Ⅱ、Ⅲ度MC更易检出管状腺瘤。

关键词：大肠黑变病不同分度结直肠息肉管状腺瘤

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Synergetic burns treatment by self-adaption release system combined with cold atmospheric plasma

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Science China(Technological Sciences) 2023年第10期66卷 2808-2823页

作者： WANG XiaoXia LIU ZhiJun ZHAO LiPing YANG HuiJie qin jiamin ZHANG JingQi ZHAO JiaXuan GUAN XiuWen ZHANG WeiFen MA JinLong School of Pharmacy Weifang Medical UniversityWeifang 261053China Department of Microbiology School of Basic Medical SciencesWeifang Medical UniversityWeifang 261053China Shandong Engineering Research Center for Smart Materials and Regenerative Medicine Weifang Medical UniversityWeifang 261053China Collaborative Innovation Center for Target Drug Delivery System Weifang Medical UniversityWeifang 261053China

In the tissue remodeling stage of burns,excessive medical therapy can cause scarring by promoting excessive fibroblast proliferation and collagen *** atmospheric plasma(CAP)has emerged in biomedicine for its excellent sterilization and wound-healing function,which is expected to reduce the use of drugs in burns ***,a novel therapy that could rapidly heal burns was developed using a combined self-adaption release system with *** self-adaption release system(Cur-ZIF8@HA)used curcumin(Cur)as the therapeutic drug and ZIF-8 modified with hyaluronic acid(HA)as the *** vitro study results showed that combined treatment methods can inactivate bacteria and enhance fibroblast cells'migration and *** vivo animal wound healing studies have demonstrated that the synergistic treatment of Cur-ZIF8@HA and CAP can help fibroblast proliferation and stimulate angiogenesis,indicating effective wound *** importantly,CAP can reduce collagen synthesis in granulation tissue recombination and further inhibit scar formation by combining with CurZIF8@*** the biomedical field,these findings underscore to a large extent that our research will open up new possibilities for the interaction of nanotechnology with new technologies of physical principles.

关键词： cold atmospheric plasma pH-sensitive release burns treatment nanoparticle

Compliant Iontronic Triboelectric Gels with Phase-Locked Structure Enabled by Competitive Hydrogen Bonding

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Nano-Micro Letters 2024年第9期16卷 180-194页

作者： Guoli Du Yuzheng Shao Bin Luo Tao Liu jiamin Zhao Ying qin Jinlong Wang Song Zhang Mingchao Chi Cong Gao Yanhua Liu Chenchen Cai Shuangfei Wang Shuangxi Nie School of Light Industry and Food Engineering Guangxi UniversityNanning 530004People’s Republic of China

Rapid advancements in flexible electronics technology propel soft tactile sensing devices toward high-level biointegration,even attaining tactile perception capabilities surpassing human ***,the inherent mechanical mismatch resulting from deficient biomimetic mechanical properties of sensing materials poses a challenge to the application of wearable tactile sensing devices in human-machine *** by the innate biphasic structure of human subcutaneous tissue,this study discloses a skin-compliant wearable iontronic triboelectric gel via phase separation induced by competitive hydrogen ***-nonsolvent interactions are used to construct competitive hydrogen bonding systems to trigger phase separation,and the resulting soft-hard alternating phase-locked structure confers the iontronic triboelectric gel with Young’s modulus(6.8-281.9 kPa)and high tensile properties(880%)compatible with human *** abundance of reactive hydroxyl groups gives the gel excellent tribopositive and self-adhesive properties(peel strength>70 N m^(−1)).The self-powered tactile sensing skin based on this gel maintains favorable interface and mechanical stability with the working object,which greatly ensures the high fidelity and reliability of soft tactile sensing *** strategy,enabling skin-compliant design and broad dynamic tunability of the mechanical properties of sensing materials,presents a universal platform for broad applications from soft robots to wearable electronics.

关键词： Triboelectric nanogenerator Cellulose Triboelectric gel Self-powered sensor Energy harvesting

Tuning electronic properties of cobalt phthalocyanines for oxygen reduction and evolution reactions

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Science China Chemistry 2024年第1期67卷 398-407页

作者： Jianlin Jiang Zhen Liu Shuaijun Pan Xinnian Xia Bing qin Yang Hu Xuxu Wang jiamin Lan Yu Gu Encai Ou Weijian Xu Joseph J.Richardson Rui Guo SINOPEC Research Institute of Petroleum Processing Co. Ltd.Beijing 100083China College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410082China College of Chemistry and Materials Science Hunan Agricultural UniversityChangsha 410128China Department of Chemical Engineering The University of MelbourneParkville 3010Australia College of Environmental Science and Engineering Hunan UniversityChangsha 410082China School of Engineering RMIT UniversityMelbourneVictoria 3001Australia

Metal–phthalocyanines are a class of catalytically active materials promising in energy conversion and storage fields(e.g.,electrocatalysis).However,understanding and controlling the electrochemical properties in metal-phthalocyanine systems is ***,we elucidate the electrocatalytic origins of a series of cobalt-phthalocyanine molecular catalysts and finetune their electronic properties at the atomic level,both experimentally and *** interactions between the cobalt center and the local coordination environment are regulated by introducing either electron-donating or electron-withdrawing groups on the phthalocyanine ligand,and the spin-orbit splitting of cobalt is increased by~0.15 eV compared with the nonsubstituted ***,the aminated cobalt phthalocyanine-based electrocatalysts exhibit low free energies in the ratedetermining steps of the oxygen reduction(-1.68 eV)and oxygen evolution reactions(0.37 eV).This contributes to the high electrocatalytic activity(e.g.,a halfwave potential of 0.84 V and an overpotential of 0.30 V at 10 mAcm^(-2)),featuring a high selectivity of a four-electron pathway(i.e.,a negligible by-product of hydrogen peroxide).These catalysts also exhibit exceptional kinetic current density(Tafel slope of 100 mV dec^(-1))in oxygen reduction reactions,in addition to a superior power density(158 mWcm^(-2))and a high cycling stability(>1,300 cycles)in Zn-air batteries,outperforming the commercial Pt/C and/or RuO2counterparts.

关键词： interfacial wettability molecular catalysts carbon nanotubes density functional theory electrochemistry

LOVE IS KEY Organizations Help Satisfy Needs of Women,CChildren,Families

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Women of China 2024年第9期 20-33页

作者： Yao Yao Wang Yin Zhang jiamin Meng qin 不详

The Resolution of the Central Committee of the Communist Party of China(CPC)on Further Deepening Reform Comprehensively to Advance Chinese Modernization was adopted July 18,2024,during the third plenary session of the 20th CPC Central *** resolution states that the roles of people's organizations,such as trade unions,Chinese Communist Youth League organizations,and women's federations,will be brought into play in connecting with and serving the people.

关键词： union connecting Communist