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Derimorphisms over Algebras and Applications

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代数集刊:英文版 2023年第2期30卷 193-204页

作者： X.cao S.H.Liu X.S.Lu z.J.Ye z.R.yu Y.H.zhang School of Mathematical Sciences Shanghai Jiao Tong University 800 Dongchuan RoadShanghai 200240China Moe Key Lab of Scientific and engineering Computing Shanghai Jiao Tong University 800 Dongchuan RoadShanghai 200240China

The new concept"derimorphism"generalizing both derivation and homomor-phism is *** a derimorphism is invertible,its inverse is a Rota-Baxter *** general theory of derimorphism is *** classification of all derimorphisms over an associative unital algebra is *** to the nonexistence of nontriv-ial positive derivations,it is shown that nontrivial positive derimorphisms do exist over any pair of opposite orderings over R[x],the lattice-ordered full matrix algebra and upper triangular matrix algebra over a totally ordered field.

关键词： derimorphism Rota-Baxter operator opposite orderings positive derimor-phism

Distributed Second-Order Continuous-Time Optimization via Adaptive Algorithm with Nonuniform Gradient Gains

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Journal of Systems Science & Complexity 2020年第6期33卷 1914-1932页

作者： MO Lipo LIU Xiaodong cao Xianbing yu Yongguang School of Mathematics and Statistics Beijing Technology and Business UniversityBeijing 100048China Department of Mathenatics Beijing Jiaotong UniversityBeijing 100044China

This paper addresses the distributed adaptive optimization problem over second-order multi-agent networks(MANs)with nonuniform gradient gains.A general convex function consisting of a sum of local differentiable convex functions is chosen as the team objective ***,based on the local information of each agent’s neighborhood,a novel distributed adaptive optimization algorithm with nonuniform gradient gains is designed,where these gains only have relations with agents’own *** then,the original closed-loop system is changed into an equivalent one by taking a coordination ***,it is proved that the states including positions and velocities of all agents are bounded by constructing a Lyapunov function provided that the initial values are *** the theory of Lyapunov stability,it is shown that all agents can finally reach an agreement and their position states converge to the optimal solution of the team objective function ***,the effectiveness of the obtained theoretical results is demonstrated by several simulation examples.

关键词： Adaptive consensus distributed optimization nonuniform gradient gains second-order dynamics

中医药治疗早发性卵巢功能不全核心指标集的构建

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中医杂志 2024年第13期65卷 1334-1339页

作者：曹雪于长禾孟祥然秦宇宁艾艳珂刘佳中国中医科学院中医临床基础医学研究所北京市100700 北京中医药大学东直门医院

目的构建中医药治疗早发性卵巢功能不全(POI)核心指标集,规范POI中医药临床研究疗效评价指标体系。方法检索2017年1月1日至2021年12月31日PubMed、embase、Cochrane Library、Web of Science、中国知网(CNKI)、万方数据知识服务平台(WF... 详细信息

目的构建中医药治疗早发性卵巢功能不全(POI)核心指标集,规范POI中医药临床研究疗效评价指标体系。方法检索2017年1月1日至2021年12月31日PubMed、embase、Cochrane Library、Web of Science、中国知网(CNKI)、万方数据知识服务平台(WF)、维普资讯中文期刊服务平台(VIP)、中国生物医学文献服务系统(SinoMed)数据库获取文献,检索建库至2021年12月31日中国临床试验注册中心数据库、美国临床试验注册中心数据库获得临床试验注册方案,收集POI临床研究中使用的结局指标,采用半结构化访谈补充患者重视指标,构建结局指标条目池,通过德尔菲调查和共识会议筛选出核心指标。结果共纳入554篇临床研究及14项临床试验注册方案,对20位患者进行半结构化访谈,指标合并整理后共纳入77种结局指标进入指标池,两轮德尔菲调查后初步纳入20个结局指标,通过专家共识会议最终形成的核心指标集为3个指标域的8个核心结局指标,包括卵巢储备功能(卵泡刺激素、雌二醇、抗苗勒管激素、窦卵泡计数)、月经相关指标(月经症状情况)和生育结局(妊娠率、活产率和获卵数)。并通过专家讨论确定核心指标相应的测量方法及测量时间点。结论本研究形成了中医药治疗POI临床研究核心指标集,实践了核心指标集制定方法,并以此为载体探索了中医药特色核心结局指标集的制定要点。

关键词：早发性卵巢功能不全核心指标集中医药疗法临床疗效评价

STUDY OF MIXeD RARe eARTH MeTAL (ReM) CONVeRSIONCOATING ON ALUMINUM ALLOY LY12

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Acta Metallurgica Sinica(english Letters) 2000年第5期13卷 1034-1038页

作者： yu, X.W. cao, C.N. zhou, D.R. Yin, z.D. Lab. for Corrosion and Protection Inst. of Corrosion and Protection Chinese Acad. of Sci. shenyang 110015 China Sch. of Mat. Sci. and eng. Harbin Inst. of Technol. Harbin 150001 China

The process of mixed rare earth metal (ReM) conversion coating on aluminum alloy LY12 (2024) was introduced. The corrosion resistance of mixed ReM conversion coating was examined by using weight loss test and electrochemical method. The results show that the mixed ReM conversion coating increases the corrosion resistance of the alloy surface. examination result of scanning electron microscope (SeM) shows that the coating exhibits honeycomb-like feature. X-ray diffraction (XRD) analysis reveals that the coating is amorphous. The result of X-ray photoelectron spectroscopy (XPS) indicates that mixed ReM conversion coating consists predominantly of Ce and O. The contents of other rare earth elements (La, Pr) are relatively low.

关键词： Aluminum alloys Composition Corrosion resistance Inorganic coatings Morphology

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支气管镜辅助喷洒利多卡因局麻效果评估

社区医学杂志 2024年第2期22卷 60-64页

作者：于文萱吴齐曹长琦北京大学肿瘤医院暨北京市肿瘤防治研究所内镜中心恶性肿瘤发病机制及转化研究教育部重点实验室北京100142

目的探讨雾化吸入利多卡因与电子支气管镜辅助喷洒利多卡因在支气管镜检查中的局麻效果比较。方法选取2020-03-01-2021-03-31北京大学肿瘤医院内镜中心拟进行电子支气管镜检查的160例患者为研究对象,分为对照组(80例)和观察组(80例)。... 详细信息

目的探讨雾化吸入利多卡因与电子支气管镜辅助喷洒利多卡因在支气管镜检查中的局麻效果比较。方法选取2020-03-01-2021-03-31北京大学肿瘤医院内镜中心拟进行电子支气管镜检查的160例患者为研究对象,分为对照组(80例)和观察组(80例)。对照组采用常规雾化吸入利多卡因进行局部麻醉。观察组采用电子支气管镜辅助一次性使用内镜喷洒管喷洒利多卡因进行局部气道麻醉。比较2组患者1和3min心率、1和3min血氧饱和度、检查时长、呛咳次数、补喷麻药次数、患者疼痛自评分、患者咳嗽自评分、术者咳嗽他评分、术者操作满意度。结果2组患者检查时长、术前心率、1和3min心率、术前血氧饱和度水平、术中补喷麻药次数比较,差异无统计学意义,均P>0.05;观察组1min血氧饱和度为100.0%(99.0%~100.0%),高于对照组的98.0%(96.0%~100.0%),z=-5.364,Pz=-4.199,Pz=-4.457,Pz=-5.857,Pz=-5.140,Pz=-5.966,Pz=-6.001,P<0.001。对照组有8例患者出现手麻症状,立即停止患者吸入雾化吸入,指导减慢呼吸频率,症状缓解消失。所有患者均未见利多卡因相关不良反应。结论电子支气管镜辅助一次性使用内镜喷洒管喷洒利多卡因表面麻醉效果优于雾化吸入利多卡因。

关键词：电子支气管镜一次性使用内镜喷洒导管利多卡因注射液麻醉

琥珀酸美托洛尔缓释片结合复心合剂治疗冠状动脉心肌桥心绞痛的效果及对血管内皮功能的影响

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中国医学创新 2024年第14期21卷 48-52页

作者：曹敏黄斐余亚鹏南昌市洪都中医院综合内科江西南昌330008 南昌市洪都中医院内分泌二科江西南昌330008

目的:探索琥珀酸美托洛尔缓释片与复心合剂联合治疗冠状动脉心肌桥心绞痛的价值。方法:选取2020年2月—2022年10月南昌市洪都中医院收治的70例冠状动脉心肌桥心绞痛患者为研究对象,按随机数字表法分组,各35例。对照组选择琥珀酸美托洛... 详细信息

目的:探索琥珀酸美托洛尔缓释片与复心合剂联合治疗冠状动脉心肌桥心绞痛的价值。方法:选取2020年2月—2022年10月南昌市洪都中医院收治的70例冠状动脉心肌桥心绞痛患者为研究对象,按随机数字表法分组,各35例。对照组选择琥珀酸美托洛尔缓释片治疗,观察组选择琥珀酸美托洛尔缓释片结合复心合剂治疗。比较两组临床效果、不良反应发生情况等。结果:两组不良反应发生率对比,差异无统计学意义(P>0.05)。观察组临床总有效率高于对照组,差异有统计学意义(P0.05);治疗后,观察组一氧化氮(nitricoxide,NO)、反应性充血指数(reactive hyperemia index,RHI)、左心室射血分数(LVeF)、左心室短轴缩短率(FS)、二尖瓣前向血流e峰与A峰的比值均高于对照组,6分钟步行距离(6 minutes walking distance,6MWD)远于对照组,内皮缩血管肽(endothelin,eT)-1、神经肽Y(neuropeptide Y,NPY)均低于对照组,心绞痛发作次数少于对照组,持续时间短于对照组,差异均有统计学意义(P<0.05)。结论:琥珀酸美托洛尔缓释片与复心合剂联合治疗冠状动脉心肌桥心绞痛具有理想疗效。

关键词：冠状动脉心肌桥心绞痛琥珀酸美托洛尔缓释片复心合剂血管内皮功能

机械性吸呼仪参数设置对模拟肺呼气峰流速、呼气容量的影响研究

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医疗卫生装备 2024年第6期45卷 65-70页

作者：吕玉颖曹志新首都医科大学附属北京朝阳医院-北京市呼吸疾病研究所呼吸与危重症医学科北京100043

目的:探讨使用机械性吸呼仪(mechanical in-exsufflation,MIe)治疗中的吸气压力设置参数(set inspiratory pressure,SIP)、呼气压力设置参数(set expiratory pressure,SeP)及SIP/SeP对模拟肺呼气峰流速(peak expiratory flow,PeF)和呼气容量(expiratory volume,eV)的影响,以为临床治疗中增强气道廓清的效果提供参考。方法:将MIe与模拟肺连接,在模拟肺无自主呼吸状态下分别针对健康成人、肺部感染成人、慢性阻塞性肺疾病成人、急性呼吸窘迫综合征成人设置气道阻力及肺顺应性。MIe压差(SIP与SeP的差值)分别设置为60、40、30 cmH_(2)O(1 cmH_(2)O=98.06 Pa),在固定压差下,SIP/SeP设置为1∶1、1∶2、2∶3。在每种参数设置状态下,MIe均工作5个周期,记录PeF、eV的平均值。分析MIe治疗中PeF的出现时间,对比不同参数设置下PeF、eV的平均值,并分析SIP及SeP分别与PeF、eV的相关性。采用SPSS 20.0统计学软件进行数据分析。结果:模拟肺在不同生理条件下,MIe治疗中的PeF均出现在呼气初始,当压力释放的瞬间产生最大的PeF。MIe设置的压差越大,产生的PeF、eV越大;在压差相同情况下,SIP/SeP为1∶1时产生的PeF、eV最大。SIP与PeF、eV的斯皮尔曼相关系数为0.919、0.990,SeP与PeF、eV的斯皮尔曼相关系数为-0.737、-0.674,SIP与PeF、eV的相关性高于SeP与PeF、eV的相关性。结论:MIe治疗中设置压差越大,产生的气道廓清效果越好;在压差相同情况下,将SIP/SeP设置为1∶1,能够产生咳嗽效应的最大化,从而增强气道廓清的效果。

关键词：机械性吸呼仪模拟肺呼气峰流速呼气容量吸气压力设置参数呼气压力设置参数

Metabolites isolated from Penicillium HDS-z-1e, an endophytic fungal strain isolated from Taxus cuspidata and their activation effect of catalase

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Chinese Herbal Medicines 2024年第2期16卷 227-230页

作者： Chuan Tang Rui Gao Xiaoyuan Tang yu zhang Weixing Feng Baomin Feng Xuan Lu College of Life and Health Dalian UniversityDalian 116622China

Objective:To study the compounds isolated from Penicillium HDS-z-1e,an endophytic fungal strain isolated from Taxus cuspidata and their activation effect of catalase(CAT).Methods:The chemical constituents were isolated from Penicillium HDS-z-1e,by using silica gel,Sephadex LH-20 and *** structural elucidations of five metabolites were elucidated on the basis of spectroscopic including 1 H-NMR,13C-NMR,HMBC and *** activation sites of catalase have been investigated by molecular ***:Five metabolites,compounds(1–5)were isolated from Penicillium HDS-z-1e and identified as 4-hydroxy-4-methyltetrahydro-2H-pyran-2-one(1),4-hydroxymethyl-5,6-dihydro-pyran-2-one(2),5,6-dihydro-2-oxo-2H-pyran-4-carboxylic(3),N-acetyl-hydrazinobenzoic acid(4),and methyl 2-(2,5-dihydroxyphenyl)acetate(5).Conclusion:Compound 3 is a new *** 3 and 4 may have potential activators of catalase,providing a theoretical basis for the development of CAT activators.

关键词： catalase activators 5,6-dihydro-2-oxo-2H-pyran-4-carboxylic molecular simulation penicillium Taxus cuspidata Sieb.et zucc

effects of grain boundary diffusion process on magnetic properties enhancement and microstructure evolution of hot-deformed Nd-Fe-B magnets

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Journal of Rare earths 2023年第5期41卷 698-704,I0003页

作者： Jiayi He yukun Liu zhigao yu Jiali cao Hongya yu zhongwu Liu School of Materials Science and engineering South China University of TechnologyGuangzhou 510640China

Grain boundary diffusion(GBD)process is an important approach for producing Nd-Fe-B magnets with high coercivity and high thermal *** GBD for hot-deformed Nd-Fe-B magnets with nanocrystalline micro structure is more complicated compared to sintered ***,we investigated the effects of different GBD methods,i.e.,intergranular addition(in-situ GBD 1#),in-situ GBD from magnet surface during hot pressing and hot deformation(in-situ GBD 2#),and conventional GBD,on the magnetic properties and microstructure of hot deformed *** the treatment by these three GBD approaches using 2 wt%Pr_(40)Tb_(30)Cu_(30)diffusion source,the coercivity of the hot-deformed magnet increases from 1281 to 1567,1412 and 2022 kA/m,*** coercivity enhancement is attributed to the formation of local(Nd,Tb)2Fe14B phase with stro ng magnetic *** grain orientation is found in both in-situ GBD 1#and conventional GBD treated samples mainly due to the local stress state variation and the rotation of platelet ***,the in-situ GBD 2#processed sample has a high orientation at diffusion surface,which may be caused by the modified surface state of the magnet by the diffusion *** with the in-situ GBD processes,the conventional GBD exhibits a higher utilization efficiency of *** the in-situ GBD is effective to treat thick hot-deformed magnets,further effort should be aimed at enhancing its diffusion efficiency.

关键词： Nd-Fe-B Grain boundary diffusion Coercivity hot deformation Crystal orientatio