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In-situ AFM and quasi-in-situ studies for localized corrosion in Mg-9Al-1Fe-(Gd) alloys under 3.5 wt.% NaCl environment

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Journal of Magnesium and Alloys 2024年第3期12卷 1170-1185页

作者： Junping Shen Tao Lai zheng yin Yang Chen Kun Wang Hong Yan Honggun Song Ruiliang Liu Chao Luo Zhi Hu School of Advanced Manufacturing Nanchang UniversityNanchang 330031China Institute for Advanced Study Nanchang UniversityNanchang 330031China Singapore Centre for Environmental Life Sciences Engineering Nanyang Technological University60 Nanyang Drive 637751Singapore

Revealing the localized corrosion process of Mg alloy is considered as one of the most significant ways for improving its corrosion *** reliable monitor should be high distinguishability and real-time in liquid ***,Mg-9Al-1Fe and Mg-9Al-1Fe-1Gd alloys were designed to highlight the impact of intermetallic on the corrosion ***-situ AFM with a special electrolyte circulation system and quasi-in-situ SEM observation were used to monitor the corrosion process of the designed ***-EDS and TEM-SAED were applied to identify the intermetallic in the designed alloys,and their volta potentials were measured by *** to the real-time and real-space in-situ AFM monitor,the corrosion process consisted of dissolution of anodicα-Mg phase,accumulation of corrosion products around cathodic phase and shedding of some fine cathodic ***,the localized corrosion process of Mg alloy was revealed combined with the results of the monitor of corrosion process and Volta potential difference.

关键词： Magnesium Localized corrosion In-situ AFM SKPFM Corrosion behaviour.

LDL-C rebound after long-term evolocumab treatment and intravascular imaging evidence in a familial hypercholesterolemia patient with early-onset myocardial infarction

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Chronic Diseases and Translational Medicine 2024年第1期10卷 69-74页

作者： Zhifan Li Shuang Zhang zheng yin Wenjia Zhang Yonggang Sui Jianjun Li Kefei Dou Jie Qian Naqiong Wu Cardiometabolic Center National Center for Cardiovascular DiseasesFuwai HospitalChinese Academy of Medical Science and Peking Union Medical CollegeBeijingChina

Patients with familial hypercholesterolemia(FH)have elevated low-density lipoprotein cholesterol(LDL-C)levels and are at high risk of premature cardiovascular disease.1 Heterozygous FH(HeFH)is one of the commonest genetic disorders,and is more frequent among those with ischemic heart disease(IHD),atherosclerotic cardiovascular disease(ASCVD)and premature IHD.

关键词： cardiovascular familial elevated

Mitochondria-targeted atovaquone promotes anti-lung cancer immunity by reshaping tumor microenvironment and enhancing energy metabolism of anti-tumor immune cells

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Cancer Communications 2024年第3期44卷 448-452页

作者： Donghai Xiong zheng yin Mofei Huang Yian Wang Micael Hardy Balaraman Kalyanaraman Stephen T Wong Ming You Center for Cancer Prevention Houston Methodist Neal Cancer CenterHouston Methodist HospitalWeill Cornell MedicineHoustonTexasUSA Department of Systems Medicine and Bioengineering Houston Methodist Cancer CenterHouston Methodist HospitalWeill Cornell MedicineHoustonTexasUSA Aix Marseille Univ Centre Nationaldela Recherche Scientifique(CNRS)Institut de Chimie Radicalaire(ICR)UnitéMixte de Recherche(UMR)7273MarseilleFrance Department of Biophysics Medical College of WisconsinMilwaukeeWisconsinUSA

Dear Editor,Atovaquone(ATO),a mitochondrial inhibitor,has anti-cancer effects[1].Based on ATO,we developed mitochondria-targeted atovaquone(Mito-ATO)that had even stronger anti-tumor efficacy than ATO[2].We syn-thesized Mito-ATO by attaching the bulky triphenylphos-phonium(TPP)group to ATO via a ten-carbon alkyl chain(Supplementary file of methods;Supplementary Figure S1).

关键词： metabolism immunity targeted

Eikenella corrodens isolated from pleural effusion:A case report

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World Journal of Clinical Cases 2024年第18期12卷 3596-3602页

作者： Zi-Cong Liang Hao Ouyang Xue-Jing Song Jian-Xin Liang Wei-Hua zheng Jian-Jun Chen zheng-Gang yin Sha-Yan Chen Department of Laboratory Science Binhaiwan Central Hospital of DongguanDongguan 523905Guangdong ProvinceChina Key Laboratory of accurately etiological research on the pathogenesis of inflammation and cancer Dongguan 523905Guangdong ProvinceChina Central Laboratory Binhaiwan Central Hospital of DongguanDongguan 523905Guangdong ProvinceChina

BACKGROUND The bacterium Eikenella,classified as a gram-negative member of the phylum Proteobacteria,is distinguished by its rarity,corrosive nature,facultative anaerobic properties,and conditional *** represents the sole species within its genus-Eikenella corrodens(***)-and can be found colonizing both human and animal oral and nasopharyngeal ***,it occasionally inhabits the gastrointestinal or urogenital ***,its slow growth rate can be attributed to its high nutritional ***,there is an uneven distribution of construction and diagnostic capacity in China which poses undeniable challenges for the clinical examination and analysis of this case,especially in the basic *** SUMMARY Here we presented a case of empyema associated with *** infection in a 67-year-old male patient without any previous history of infectious diseases in our primary hospital in Dongguan district of *** patient was admitted due to recurrent worsening cough,sputum production,and dyspnea for 3 d,which had persisted for over 20 ***,the patient experienced a onehour episode of *** admission,immediate comprehensive examinations were conducted on the patient which subsequently led to his admission to the intensive care ***,the patient presented with drowsiness and profuse sweating along with bilateral conjunctival edema observed during initiation of non-invasive ventilation,suggesting empyema.A significant amount of coffee-colored malodorous pleural fluid was drained during the procedure above and sent to the laboratory department for ***,laboratory culture results confirmed the presence of *** infection in the pleural fluid *** patient received antimicrobial therapy until died on day 22 in the *** In this report,we presented a case of empyema associated with *** *** courses of morphological examination,vi

关键词： Eikenella corrodens Pleural fluid Morphology Viable culture Biochemical identification Case report

Optical PAM-4/PAM-8 generation via dual-Raman process in Rydberg atoms

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Chinese Physics B 2024年第6期33卷 383-388页

作者：宋晓云尹政任冠宇韩明志杨艾红祁义红彭延东 Qingdao Key Laboratory of Terahertz Technology College of Electronic and Information EngineeringShandong University of Science and TechnologyQingdao 266590China School of Physics East China University of Science and TechnologyShanghai 200237China MIIT Key Laboratory of Complex-field Intelligent Exploration Beijing Institute of TechnologyBeijing 100081China

A scheme of optical four-level pulse amplitude modulation(PAM-4) is proposed based on dual-Raman process in Rydberg atoms. A probe field counter-propagates with a dual-Raman field which drives the ground and the excited states transition, respectively, and the Rydberg transition is driven by a microwave(MW) field. A gain peak appears in the probe transmission and is sensitive to the MW field strength. Optical PAM-4 can be achieved by encoding an MW signal and decoding the magnitude of a probe signal. Simulation results show that the differential nonlinearity and the integral nonlinearity of the proposed scheme can be reduced by 5 times and 6 times, respectively, compared with the counterparts of previous scheme, and the ratio of level separation mismatch is close to the ideal value 1. Moreover, the scheme is extended to optical PAM-8 signal, which may further improve the spectral efficiency.

关键词： Rydberg atoms PAM-4/PAM-8 dual-Raman process

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融合风格迁移的对抗样本生成方法

西安交通大学学报 2024年第7期58卷 191-202页

作者：于振华殷正叶鸥丛旭亚西安科技大学计算机科学与技术学院西安710054

针对现有面向目标检测的对抗样本生成方法泛化能力弱的问题,提出了一种融合风格迁移的对抗样本生成方法。首先,提出一种新的对抗补丁生成方法,使用风格迁移方法将风格图像不同层次特征提取并融合,生成无明显物体特征且纹理丰富的对抗补... 详细信息

针对现有面向目标检测的对抗样本生成方法泛化能力弱的问题,提出了一种融合风格迁移的对抗样本生成方法。首先,提出一种新的对抗补丁生成方法,使用风格迁移方法将风格图像不同层次特征提取并融合,生成无明显物体特征且纹理丰富的对抗补丁;然后,利用梯度类激活映射方法生成目标的特征热图,对目标不同区域在目标检测模型中的关键程度进行可视化表示;最后,构建一种热图引导机制,引导对抗补丁在攻击目标的关键位置进行攻击以提高其泛化能力,生成最终对抗样本。在DroNet室外数据集上进行实验,结果表明:针对单阶段目标检测模型YOLOv5生成的对抗样本,采用所提方法计算得到的攻击成功率可达84.07%;应用于攻击两阶段目标检测模型Faster R-CNN时,采用所提方法计算得到的攻击成功率仍保持在67.65%;与现有的主流方法相比,所提方法生成的对抗样本攻击效果较好,且具有良好的泛化能力。

关键词：目标检测对抗样本风格迁移对抗补丁热图引导

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串联扰动型金属有机框架玻璃的热诱导晶化及结构转变

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硅酸盐学报 2024年第8期52卷 2566-2574页

作者：刘涛殷政匡小军曾明华广西电磁化学功能物质重点实验室桂林理工大学化学与生物工程学院广西桂林541004 药用资源化学与药物分子工程省部共建国家重点实验室广西师范大学化学与药学学院广西桂林541004

晶化行为极大影响玻璃材料的加工赋形及力学、光、电等性能,但晶化过程中微观结构演变机制远不明晰;对于全新类别金属有机框架(MOF)玻璃,相关晶化及高温动态配位化学系统研究更为匮乏。动态高孔穴四重穿插钻石网型MOF–[Co(L1)_(2)]_(4... 详细信息

晶化行为极大影响玻璃材料的加工赋形及力学、光、电等性能,但晶化过程中微观结构演变机制远不明晰;对于全新类别金属有机框架(MOF)玻璃,相关晶化及高温动态配位化学系统研究更为匮乏。动态高孔穴四重穿插钻石网型MOF–[Co(L1)_(2)]_(4n),在水分子配位及热去除多层级协同扰动下可不经高温熔融直接玻璃化。作为首个串联扰动法获得的传统MOF成功玻璃化实例,热重和差热分析发现去水扰动不定形态MOF在T_(g)=560 K处发生玻璃化转变,过冷液体于558~586K间稳定,随后在T_(c)=597 K处发生明显晶化,并进一步在T_(d)=695 K以上发生结构分解;原位变温(PXRD)跟踪并证实了MOF去水无定形→玻璃化→过冷液化→再晶化的相态演变过程;X射线全散射原子对分布函数(PDF)揭示了玻璃态及再晶化态样品的短–中–长程结构特征。基于CCDC数据库结构检索以及铜基同构MOF的合成,结合MOF玻璃晶化相高分辨PXRD谱的Rietveld拟合结构验证,确认了致密六重穿插钻石网MOF–[Co(L_(1))_(2)]_(6n)的生成。MOF过冷液体不同温度淬冷所制备玻璃保有气体可接触孔性并呈现温度依赖变化,揭示了相均一MOF过冷液体内部液态结构差异性。这一研究构建了MOF“晶态–扰动态–过冷液态–玻璃态–晶化态”多相结构演变有趣例证,揭示了MOF玻璃及其过冷液体独特的高温配位自识别和有序化结构自组装行为。

关键词：金属有机框架玻璃结构与相态演变过冷液体晶化气体吸附

三相PWM整流器离散空间矢量无模型预测电流控制策略

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电机与控制学报 2024年第6期28卷 163-170页

作者：胡存刚尹政张悦罗魁芮涛冯壮壮中国电力科学研究院有限公司新能源与储能运行控制国家重点实验室北京100192 安徽大学电气工程与自动化学院安徽合肥230601 安徽大学互联网学院安徽合肥230601

针对PWM整流器模型预测控制对系数参数准确性高度依赖的问题,提出一种基于离散空间矢量的无模型预测电流控制(MFPCC)策略。该策略通过矢量合成,在每个控制周期应用两个基本矢量,提高了预测电流的准确性;通过峰谷采样,分别测量并存储上... 详细信息

针对PWM整流器模型预测控制对系数参数准确性高度依赖的问题,提出一种基于离散空间矢量的无模型预测电流控制(MFPCC)策略。该策略通过矢量合成,在每个控制周期应用两个基本矢量,提高了预测电流的准确性;通过峰谷采样,分别测量并存储上一控制周期两个基本矢量作用下的电流梯度;并建立电流梯度方程,从而根据应用矢量的电流梯度进一步更新剩余6个未应用矢量的电流梯度,结合当前时刻的电流采样值,实现未来时刻的电流预测,得到下一时刻最优的虚拟矢量。该方法不依赖于任何系统参数,且消除了传统MFPCC策略中电流梯度更新停滞现象,降低了输出电流谐波。最后,通过实验和仿真验证了所提方法的有效性和优越性。

关键词： PWM整流器无模型预测电流控制离散空间矢量电流梯度更新停滞现象

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中式符号元素在现代室内建筑设计中的运用

佛山陶瓷 2024年第1期34卷 134-136页

作者：郑颖朱墨福州软件职业技术学院福州350001 福州大学至诚学院福州350001

在我国经济发展水平逐步提升的背景下,人民群众开始关注个人生活质量,现代室内建筑设计作为建筑行业极为重视的内容,为契合社会发展需求设计人员选择将中式元素与建筑行业相融合,充分满足现阶段人民群众的生活需求,借助中式符号元素实... 详细信息

在我国经济发展水平逐步提升的背景下,人民群众开始关注个人生活质量,现代室内建筑设计作为建筑行业极为重视的内容,为契合社会发展需求设计人员选择将中式元素与建筑行业相融合,充分满足现阶段人民群众的生活需求,借助中式符号元素实现生活与艺术功能的有机统一。文中对现代室内建筑设计内中式符号元素的应用,总结分析中式符号元素应用的具体路径,促进现代室内建筑设计领域发展进程。

关键词：中式符号元素现代设计室内设计