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用于电催化合成过氧化氢的碳电极综述

新型炭材料（中英文） 2024年第2期39卷 254-270页

作者：黄显怀杨鑫科桂玲刘绍根王坤荣宏伟韦伟安徽建筑大学环境与能源工程学院市政工程系安徽合肥230601 广州大学土木工程学院市政工程系广东广州51000606 珠江三角洲水质安全与保护教育部重点实验室广东广州510006

通过双电子(2e-)途径的电催化氧还原方式能够即时合成过氧化氢(H_(2)O_(2)),远超传统的蒽醌工艺。近年来,碳电极因具有良好的催化效果和优越的稳定性在电催化合成H_(2)O_(2)方面受到越来越多的关注。本综述结合材料改性与润湿性调整,从... 详细信息

通过双电子(2e-)途径的电催化氧还原方式能够即时合成过氧化氢(H_(2)O_(2)),远超传统的蒽醌工艺。近年来,碳电极因具有良好的催化效果和优越的稳定性在电催化合成H_(2)O_(2)方面受到越来越多的关注。本综述结合材料改性与润湿性调整,从三相界面的角度考虑与H_(2)O_(2)合成速率及使用寿命的关系。介绍了碳电极的结构与电催化合成H_(2)O_(2)的原理,包括单质炭材料、无金属催化剂、贵金属催化剂与非贵金属催化剂4种主流催化剂;金属阳极与电解液对于三相界面的影响;碳电极润湿性与三相界面的关系,指出侧重于提高2e-途径选择性的改性方式也会对电极润湿性造成影响。此外,合理地设计电器原件与提升碳电极合成H_(2)O_(2)功效的关系。最后,讨论了当前碳电极电催化合成H_(2)O_(2)所面临的问题与未来的研究方向。

关键词：原位合成过氧化氢碳电极固液气三相界面润湿性

挤入还是挤出:基本医疗卫生服务影响商业健康险消费效应分析

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保险研究 2024年第3期 71-86页

作者：邢晓卫匡贤明东北大学工商管理学院

基本医疗卫生服务与商业健康保险发展的关系对中国国民健康水平的提升和健康中国行动的实现具有重要意义。本文探讨基本医疗卫生服务对商业健康保险消费的影响。研究发现:商业健康保险消费具有时空依赖特征;基本医疗卫生服务与本地和周... 详细信息

基本医疗卫生服务与商业健康保险发展的关系对中国国民健康水平的提升和健康中国行动的实现具有重要意义。本文探讨基本医疗卫生服务对商业健康保险消费的影响。研究发现:商业健康保险消费具有时空依赖特征;基本医疗卫生服务与本地和周边地区的商业健康保险消费均存在U形关系;当基本医疗卫生服务达到特定阈值后,呈现本地和周边地区的双重“挤入”效应,但本地“挤入”效应更易实现;居民消费和风险意识是基本医疗卫生服务影响商业健康保险消费的重要中介变量,即基本医疗卫生服务通过改变居民消费和风险意识影响商业健康保险消费;基本医疗卫生服务影响商业健康保险消费的程度与方向,还受健康风险损失、互联网冲击、区域禀赋、健康保险供给主体和健康风险承载主体等因素影响。基于此,本文提出平衡资源配置、明确基本医疗卫生服务“基本”和“非基本”界限、关注居民个体行为和构建商业健康保险大生态系统等建议。

关键词：基本医疗卫生服务商业健康保险挤入挤出

Preparation of kakkatin derivatives and their anti-tumor activity

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World Journal of Clinical Oncology 2024年第8期15卷 1078-1091页

作者： Yu-Ying Jiang Hui-Hua Dong Wen-Ting Zhou Jia-Zi Luo xian wei Yan-Qiang Huang Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance Youjiang Medical University for NationalitiesBaise 533000Guangxi Zhuang Autonomous RegionChina Key Laboratory of the Prevention and Treatment of Drug Resistant Microbial Infecting Youjiang Medical University for NationalitiesBaise 533000Guangxi Zhuang Autonomous RegionChina Collaborative Innovation Center for Guangxi Ethnic Medicine The School of Chemistry and Pharmaceutical SciencesYoujiang Medical University for NationalitiesBaise 533000Guangxi Zhuang Autonomous RegionChina Research Center for the Prevention and Treatment of Drug Resistant Microbial Infecting Youjiang Medical University for NationalitiesBaise 533000Guangxi Zhuang Autonomous RegionChina

BACKGROUND Modern pharmacological studies have confirmed that plant-derived compounds from Puerariae flos(PF)has significant biological activities against liver damage,tumors and *** is an isoflavone polyphenolic compound isolated from PF ***,the effect of kakkatin and its derivatives on anti-tumor has not been well *** To design and synthesize a kakkatin derivative[6-(hept-6-yn-1-yloxy)-3-(4-hydroxyphenyl)-7-methoxy-4H-chromen-4-one(HK)]to explore its anti-tumor biological *** Hept-6-yn-1-yl ethanesulfonate was introduced to replace hydrogen at the hydroxyl position of kakkatin phenol,and the derivative of kakkatin was prepared;the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide was used to detect cell viability,a clone formation assay was adopted to detect cell proliferation,apoptosis,necrosis,and cell cycles were analyzed by Annexin V/propidium iodide staining and flow *** migration and invasion ability were evaluated by cell scratch assay and transwell *** potential mechanism of HK on hepatocellular carcinoma(HCC)SMMC-7721 cells was explored through network pharmacology and molecular docking,and finally real-time PCR assays was used to verify the potential targets and evaluate the biological activity of *** Compared with kakkatin,the modified HK did not significantly increase the inhibitory activity of gastric cancer MGC803 cells,but the inhibitory activity of HCC SMMC-7721 cells was increased by about 30 times,with an IC50 value of 2.5μM,and the tumor inhibition effect was better than cisplatin,which could significantly inhibit the cloning,invasion and metastasis of HCC SMMC-7721 cells,and induce apoptosis and G2/M cycle *** mechanism of action is mainly related to the upregulation of PDE3B and NFKB1 target proteins in the cAMP *** HK have a significant inhibitory effect on HCC SMMC-7721 cells,and the targets of their action may be PDE3B and NFKB1 prote

关键词： Kakkatin Derivative Hepatocellular carcinoma Anti-tumor Biological activity

Latent profile analysis of perceived stress and influencing factors in colorectal cancer patients

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Frontiers of Nursing 2024年第3期11卷 303-312页

作者： Yu-Yue Tan Yin-Hong Liu Zhi-Hui Zhang wei-Rong Huang Man-Lin Yan xian-Rong Li School of Nursing Southwest Medical UniversityLuzhouSichuan 646000China General Surgery Department Affiliated Hospital of Southwest Medical University(Gastrointestinal Surgery)LuzhouSichuan 646000China

Objective:To understand the latent categories of perceived stress in colorectal cancer patients and analyze the characteristics of different categories of ***:A total of 255 colorectal cancer patients receiving treatment in the gastrointestinal surgery and oncology depar tments of a ter tiary Grade A hospital in Sichuan Province,from January 2023 to June 2023,were selected as the study *** information questionnaire,Chinese version of the Perceived Stress Scale(CPSS),and Comprehensive Score Table for Patient-Repor ted Outcome Measures of Economic Toxicity(COST-PROM)were used for data ***:Perceived stress in colorectal cancer patients was classified into 3 latent categories:C1“Low stress-stable type”(19.2%),C2“Moderate stress-uncontrolled type”(23.9%),and C3“High stress-anxious type”(56.9%).The average score of perceived stress was(34.07±5.08).Compared with C1 type,patients with a monthly household income of≤3000 RMB were more likely to belong to the C2 and C3 types(P<0.05),and patients without a stoma were less likely to belong to C3 type(P<0.05).Compared with C2 type,male patients were more likely to belong to C3 type(P<0.05),and patients without a stoma were less likely to belong to C3 type(P<0.05).Compared with C3 type,patients with higher economic toxicity scores were more likely to be classified into C1 and C2 types(P<0.05).Conclusions:Perceived stress in colorectal cancer patients exhibits distinct categorical *** gender,lower income,presence of a stoma,and higher economic toxicity are associated with higher levels of perceived stress in colorectal cancer patients.

关键词： colorectal cancer economic toxicity influence factors latent profile analysis perceived stress

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燃气分析法测量小尺寸全环燃烧室出口温度场

航空动力学报 2024年第7期39卷 169-176页

作者：资海林马瑛张阳李维张险中国航发湖南动力机械研究所湖南株洲412002

为探索燃气分析法测量小尺寸全环燃烧室出口温度场的应用,介绍了适应小尺寸全环燃烧室出口通道高度的多点非混合式水冷燃气取样探针设计,燃烧室出口分别布置2支5点非混合式水冷燃气取样探针和双铂铑热电偶,随位移机构旋转180°,实现正... 详细信息

为探索燃气分析法测量小尺寸全环燃烧室出口温度场的应用,介绍了适应小尺寸全环燃烧室出口通道高度的多点非混合式水冷燃气取样探针设计,燃烧室出口分别布置2支5点非混合式水冷燃气取样探针和双铂铑热电偶,随位移机构旋转180°,实现正、反双向数据采集,测量二氧化碳(CO_(2))、一氧化碳(CO)和未燃碳氢化合物(UHC)3种组分的体积分数进而计算燃气温度.试验结果表明:燃气分析法与热电偶法测量的燃烧室出口温度分布基本一致,两者测量的相对偏差在2%以内;同时表明燃气分析法在测量航空发动机燃烧室温度场具有测温上限高、测量准确的优点.

关键词：出口温度场小尺寸全环燃烧室燃气分析水冷燃气取样探针位移机构双向数据采集

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基于地标点匹配的高精度室内定位算法

中国惯性技术学报 2024年第2期32卷 132-138页

作者：周凌柯鲜委龚文龙李胜南京理工大学自动化学院南京210094

针对基于惯导的行人室内定位算法定位误差大的问题,提出了一种基于地标点匹配的行人高精度三维室内定位算法。该算法仅使用惯性测量单元(IMU)这一单一传感器,包含速度约束、航向角约束、水平位置约束和高度约束四个模块。水平位置约束... 详细信息

针对基于惯导的行人室内定位算法定位误差大的问题,提出了一种基于地标点匹配的行人高精度三维室内定位算法。该算法仅使用惯性测量单元(IMU)这一单一传感器,包含速度约束、航向角约束、水平位置约束和高度约束四个模块。水平位置约束模块可根据航向角变化实时检测并建立地标点,并设计了一种地标点匹配度函数,提高了地标匹配的准确度。多楼层行走实验表明所提算法能够提升行人室内定位精度,其终点误差为0.3421 m,相较于ZUPT算法和ZUPT+HDE算法分别减小了82.6%和68.3%,具有一定的工程应用价值.

关键词：室内定位卡尔曼滤波航向角约束地标点

覆膜方法对纳米纤维膜除尘滤料动态过滤性能的影响

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中国环境科学 2024年第4期44卷 1995-2002页

作者：郭颖赫赫伟东柳静献沈阳理工大学环境与化学工程学院辽宁沈阳110159 东北大学资源与土木工程学院辽宁沈阳110819

为解决聚四氟乙烯(PTFE)覆膜滤料使用中阻力增长快且膜易破损问题,基于静电纺丝技术制备了涤纶(PET)纳米纤维膜,通过直接覆膜法、热处理覆膜法及一步共纺覆膜法将PET纳米纤维膜作为表面膜与聚苯硫醚(PPS)针刺毡滤料进行复合,并对比研究... 详细信息

为解决聚四氟乙烯(PTFE)覆膜滤料使用中阻力增长快且膜易破损问题,基于静电纺丝技术制备了涤纶(PET)纳米纤维膜,通过直接覆膜法、热处理覆膜法及一步共纺覆膜法将PET纳米纤维膜作为表面膜与聚苯硫醚(PPS)针刺毡滤料进行复合,并对比研究3种覆膜方法制备的PET纳米纤维膜滤料、PPS滤料以及PTFE覆膜滤料的动态过滤性能,结果表明,与PTFE覆膜滤料相比,3种覆膜方法制备的PET纳米纤维膜滤料均表现出优异的过滤性能.稳定过滤阶段,一步共纺覆膜法制备的PET/TPU纳米纤维膜滤料完成单个周期所需时间是PTFE覆膜滤料的2倍,粉尘剥离率为99.79%,其阻力增长速率低、完成单个周期所需时间平稳,降低能耗并减少了气流对膜造成的磨损,在工业除尘领域具有较大应用潜力.

关键词：工业除尘过滤材料覆膜纳米纤维膜动态过滤性能

IDS-INT:Intrusion detection system using transformer-based transfer learning for imbalanced network traffic

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Digital Communications and Networks 2024年第1期10卷 190-204页

作者： Farhan Ullah Shamsher Ullah Gautam Srivastava Jerry Chun-wei Lin School of Software Northwestern Polytechnical UniversityXian710072ShaanxiChina Knowledge Unit of Systems and Technology University of Management and TechnologySialkot 51040Pakistan Department of Math and Computer Science Brandon UniversityBrandonMB R7A 6A9Canada Department of Computer Science and Math Lebanese American UniversityBeirut1102Lebanon Western Norway University of Applied Sciences BergenNorway Research Centre for Interneural Computing China Medical UniversityTaichungTaiwanChina

A network intrusion detection system is critical for cyber security against llegitimate *** terms of feature perspectives,network traffic may include a variety of elements such as attack reference,attack type,a subcategory of attack,host information,malicious scripts,*** terms of network perspectives,network traffic may contain an imbalanced number of harmful attacks when compared to normal *** is challenging to identify a specific attack due to complex features and data imbalance *** address these issues,this paper proposes an Intrusion Detection System using transformer-based transfer learning for Imbalanced Network Traffic(IDS-INT).IDS-INT uses transformer-based transfer learning to learn feature interactions in both network feature representation and imbalanced ***,detailed information about each type of attack is gathered from network interaction descriptions,which include network nodes,attack type,reference,host information,***,the transformer-based transfer learning approach is developed to learn detailed feature representation using their semantic ***,the Synthetic Minority Oversampling Technique(SMOTE)is implemented to balance abnormal traffic and detect minority ***,the Convolution Neural Network(CNN)model is designed to extract deep features from the balanced network ***,the hybrid approach of the CNN-Long Short-Term Memory(CNN-LSTM)model is developed to detect different types of attacks from the deep *** experiments are conducted to test the proposed approach using three standard datasets,i.e.,UNsWNB15,CIC-IDS2017,and *** explainable AI approach is implemented to interpret the proposed method and develop a trustable model.

关键词： Network intrusion detection Transfer learning Features extraction Imbalance data Explainable AI Cybersecurity

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考虑电动汽车充电选择的配送路径优化研究

数学的实践与认识 2024年第3期54卷 241-256页

作者：葛显龙李祖伟重庆交通大学经济与管理学院重庆400074

由于人们环保意识的不断增强以及国家对新能源技术应用的支持,电动汽车在城市物流“最后一公里”中得到了广泛应用.但是,电动汽车电池续航里程短、充电时间长以及配套设施不足等问题,阻碍了其在实际应用中的普及与推广.为了解决电动汽... 详细信息

由于人们环保意识的不断增强以及国家对新能源技术应用的支持,电动汽车在城市物流“最后一公里”中得到了广泛应用.但是,电动汽车电池续航里程短、充电时间长以及配套设施不足等问题,阻碍了其在实际应用中的普及与推广.为了解决电动汽车物流配送路径优化的问题,采用了客户点可充电功能分类的策略,构建了一个考虑电动汽车充电选择的配送路径优化模型,并设计了混合模拟退火遗传算法来求解.最后,通过算例仿真验证了模型和算法的有效性.

关键词：电动汽车配送充电选择混合模拟退火遗传算法