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Ultrasound blood flow characteristics changes in fetal umbilical artery thrombosis:A retrospective analysis

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World Journal of Clinical Cases 2024年第2期12卷 240-248页

作者： Si-Jie hong Li-Wei hong Xiao-Qin He Xiao-hong zhong Department of Ultrasound Women and Children's HospitalSchool of MedicineXiamen UniversityXiamen 361000Fujian ProvinceChina Ministry of Science and Education Women and Children's HospitalSchool of MedicineXiamen UniversityXiamen 361000Fujian ProvinceChina

BACKGROUND Umbilical artery thrombosis(UAT)is extremely uncommon and leads to adverse perinatal *** of blood in pregnant women is suspected to be an important risk for *** is an effective way to detect *** mother can monitor her own fetal health using ultrasound,which enables her to take preventative action in case of *** To investigate ultrasonic blood signal after UAT in the umbilical artery,and evaluate the relationship between hypercoagulability and *** We described a case of a newly formed UAT with markedly altered ultrasonic indices of umbilical artery blood flow,and retrospectively studied it with 18 UAT patients confirmed by histopathology from October 2019 and March 2023 in Xiamen Women and Children's ***’information was collected from medical archives,including maternal clinical data,neonatal outcomes,pathological findings and ultrasonic indices of umbilical artery blood flow,such as systolic-diastolic duration ratio(S/D),resistance index(RI),pulsatility index(PI)and peak systolic velocity(PSV).Ultrasound and coagulation indices were analyzed with matched samples t-test and Wilcoxon rank sum test using the statistical packages in R(version 4.2.1)including car(version 3.1-0)and stats(version 4.2.1),and visualized by ggplot2 package(version 3.3.6).RESULTS A patient with normal findings in second and third-trimester routine ultrasound scan developed UAT with severe changes in ultrasonic indices of umbilical artery blood flow(within 2.5th of reference ranges)in a short period of *** analysis of umbilical artery blood flow ultrasound indices for 19 patients with UAT showed that the decrease in S/D,RI,and PI and increase of PSV during the disease process was greater than that of *** 18 patients delivered in our hospital showed characteristic manifestations of UAT on histological examination after delivery,most of which(16/18)showed umbilical cord abnormalities,with 1

关键词： Umbilical artery thrombosis Obstetric ultrasonography Peak systolic velocity Hypercoagulation Umbilical cord abnormalities Fetus

Strong light–matter interactions based on excitons and the abnormal all-dielectric anapole mode with both large field enhancement and low loss

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Photonics Research 2024年第4期12卷 854-864页

作者： YAN-HUI DENG YU-WEI LU HOU-JIAO ZHANG zhong-hong SHI ZHANG-KAI ZHOU XUE-HUA WANG State Key Laboratory of Optoelectronic Materials and Technologies School of PhysicsSun Yat-sen UniversityGuangzhou 510275China Quantum Science Center of Guangdong–hong Kong–Macao Greater Bay Area(Guangdong) Shenzhen 518045China

The room temperature strong coupling between the photonic modes of micro/nanocavities and quantum emitters(QEs) can bring about promising advantages for fundamental and applied *** the electric fields(EFs) by using plasmonic modes and reducing their losses by applying dielectric nanocavities are widely employed approaches to achieve room temperature strong ***,ideal photonic modes with both large EFs and low loss have been ***,we propose the abnormal anapole mode (AAM),showing both a strong EF enhancement of~70-fold (comparable to plasmonic modes) and a low loss of 34 meV,which is much smaller than previous records of isolated all-dielectric *** realizing strong coupling,we further show that by replacing the normal anapole mode with the AAM,the lasing threshold of the AAM-coupled QEs can be reduced by one order of magnitude,implying a vital step toward on-chip integration of nanophotonic devices.

关键词： dielectric mode coupling

Role of glucose metabolism and signaling pathways at different stages of ovarian folliculogenesis

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Reproductive and Developmental Medicine 2024年第2期8卷 111-120页

作者： Dan Mo zhong-hong Zeng Xin Sui Rong Li Yi-Hua Yang Guangxi Reproductive Medical Center the First Affiliated Hospital of Guangxi Medical UniversityNanning 530021China Guangxi Key Laboratory of Immunology and Metabolism for Liver Diseases Nanning 530021China Key Laboratory of Early Prevention and Treatment for Regional High Frequency Tumor(Guangxi Medical University) Ministry of EducationNanning 530021China Center for Reproductive Medicine Department of Obstetrics and GynecologyPeking University Third HospitalBeijing 100191China Key Laboratory of Assisted Reproduction(Peking University) Ministry of Education/Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology/National Clinical Research Center for Obstetrics and Gynecology(Peking University Third Hospital)Beijing 100191China

The female ovaries are critical for follicle growth and development in the process known as"folliculogenesis".This complex process is regulated by various factors,among which the microenvironment around follicles appears to be *** to previous studies,folliculogenesis is an energy-demanding *** fact,well-balanced follicular energy metabolism is associated with ovarian function and female ***,glucose metabolism has been widely described as the main source of energy during ***,the follicular glucose metabolism profiles change dynamically during follicular *** abnormalities during folliculogenesis are associated with aging,primary ovarian insufficiency,and polycystic ovary syndrome,thereby leading to subfertility and infertility in *** signaling pathways in follicles appear to form a link between glucose metabolism and ***,a better understanding of glucose metabolism dynamics at different stages of folliculogenesis and the associated signaling pathways will provide potential implications for follicle developmental *** review aimed to describe variations in glucose metabolism at different stages of folliculogenesis,provide new insights into glucose metabolic disorder-related diseases,and specifically discuss two major signaling pathways that regulate glucose metabolism during folliculogenesis:phosphatidylinositol 3-kinase,protein kinase B(PI3K-PKB/AKT),and AMP-activated protein kinase(AMPK)signaling pathways.

关键词： Folliculogenesis Glucose metabolism Glycolysis Oxidative phosphorylation Signaling pathway

Convenient room-temperature synthesis of sulfur and nitrogen co-doped NiCo-LDH coupled with CNTs on NiCo foam as battery-type electrode for high performance hybrid supercapacitor

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Rare Metals 2024年第9期43卷 4286-4301页

作者： Li Song Xiao-hong zhong Fang-Lin Wang Zhi-Hui Huang Zhe hong Yun-Fang Gao Hai-Dong Wang Jian-Wei Ren Sheng-Jie Peng Lei Li College of Biological Chemical Sciences and EngineeringJiaxing University College of Chemical Engineering Zhejiang University of Technology College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Research and Development Department Jiangxi Ganfeng Li Energy Technology Co.Ltd. Department of Mechanical Engineering Science University of Johannesburg

The convenient synthesis of the composite electrode with high supercapacitance performance plays an important role in practical application but is ***, the carbon nanotubes（CNTs） coupled with lowcrystalline sulfur and nitrogen co-doped Ni Co-LDH（denoted as SN-Ni Co-LDH） nanosheets array are grown on Ni Co foam（NCF） substrate by two convenient steps of metal induced self-assembly and corrosion engineering,which present the advantages of operating at roomtemperature and low preparation costs. Benefiting from the S–N co-doping and low-crystallinity of Ni Co-LDH, the prepared SN-Ni Co-LDH@CNTs@NCF electrode presents a topping charge capacity of 2470 C·g-1(4.94 C·cm-2) at 5 m A·cm-2. Furthermore, the fabricated asymmetry supercapacitor（ASC） achieves an extraordinary energy density of 77 Wh·kg-1(0.617 m Wh·cm-2) at a power density of 438 W·kg-1(3.5 m W·cm-2) and outstanding stability(91% capacity retention after 5000 cycles at20 m A·cm-2). Impressively, the structure evolution of Ni Co-LDH during the charge/discharge processes has been thoroughly elucidated by in-situ Raman spectra. Therefore,this work verifies a powerful strategy and practical value for preparing composite electrodes with high supercapacitance performance, and also provides guidance for the rational design of the smart electrodes.

关键词： Carbon nanotubes Convenient synthesis NiCo-LDH Sulfur and nitrogen co-doped Supercapacitor

峨眉山大火成岩省钒钛磁铁矿矿床成因研究进展

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矿物岩石地球化学通报 2024年第2期43卷 292-305,I0003页

作者：柏中杰钟宏朱维光中国科学院地球化学研究所矿床地球化学国家重点实验室贵阳550081

钒钛磁铁矿矿床主要赋存于与大火成岩省相关的镁铁-超镁铁层状岩体中,虽然全球大火成岩省形成的镁铁-超镁铁层状岩体众多,但大规模的钒钛磁铁矿成矿作用并不常见。峨眉山大火成岩省内带的攀西地区赋存有数个超大型钒钛磁铁矿矿床,是全... 详细信息

钒钛磁铁矿矿床主要赋存于与大火成岩省相关的镁铁-超镁铁层状岩体中,虽然全球大火成岩省形成的镁铁-超镁铁层状岩体众多,但大规模的钒钛磁铁矿成矿作用并不常见。峨眉山大火成岩省内带的攀西地区赋存有数个超大型钒钛磁铁矿矿床,是全球最大的钒钛磁铁矿矿集区。钒钛磁铁矿大规模的成矿与母岩浆成分和磁铁矿的成因机制密切相关。此外,形成巨厚的钒钛磁铁矿矿层还需要高效的富集机制。本文系统总结了上述几个方面的研究进展,分析了导致钒钛磁铁矿大规模成矿的主要控制因素,指出钒钛磁铁矿矿床下一步研究值得关注的问题。

关键词：峨眉山大火成岩省钒钛磁铁矿矿床关键控制因素母岩浆成分

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基于几何矩特征与纹理度量的图像匹配算法

计算机应用与软件 2024年第3期41卷 213-219页

作者：金欣钟洪赣南师范大学科技学院江西赣州341000 赣南师范大学数学与计算机科学学院江西赣州341000

为提高多种几何内容变化下的特征点匹配准确度,引入双边滤波器,设计了几何矩特征耦合纹理度量的图像匹配算法。引入双边滤波器,对图像进行预处理,以去除图像中噪声,接着利用Hessian算子,准确检测图像特征。利用图像灰度信息,计算图像特... 详细信息

为提高多种几何内容变化下的特征点匹配准确度,引入双边滤波器,设计了几何矩特征耦合纹理度量的图像匹配算法。引入双边滤波器,对图像进行预处理,以去除图像中噪声,接着利用Hessian算子,准确检测图像特征。利用图像灰度信息,计算图像特征圆域内的几何矩,以形成鲁棒性较强的特征向量。通过平均梯度模型,对特征点邻域的纹理特征进行度量,并将其联合欧氏测量结果,对图像特征实施匹配。借助互相关模型,对匹配特征的相关程度进行测量,以检测特征点的匹配正确性,优化特征匹配结果。实验数据表明:较当前特征匹配方法而言,在多种几何内容变化下,所提技术具有更高的匹配准确度与鲁棒性。

关键词：图像匹配 Hessian算子双边滤波几何矩特征纹理度量平均梯度模型

智能传播时代的范式转变:媒介技术研究十大观点(2023)

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编辑之友 2024年第1期32卷 38-44页

作者：张洪忠徐鸿晟北京师范大学新闻传播学院北京100875 青海师范大学新闻学院青海西宁810000

目前,人工智能已广泛应用在信息传播领域。文章选取了2023年与媒介技术研究相关的文献,整合成十大观点:基于人类中心主义建立的传播学研究范式在研究对象、理论、方法三方面都受到人工智能技术的挑战,机器行为范式成为智能传播时代传播... 详细信息

目前,人工智能已广泛应用在信息传播领域。文章选取了2023年与媒介技术研究相关的文献,整合成十大观点:基于人类中心主义建立的传播学研究范式在研究对象、理论、方法三方面都受到人工智能技术的挑战,机器行为范式成为智能传播时代传播学研究的新路径;人工智能赋能传媒业应用与实践,多模态助力国家形象建构打开局面;大模型使用推动网络结构向超级节点的再中心化演变,进而对人类文明进程产生影响;深度伪造制造认知“罗生门效应”,推动网络空间“典论战”向“认知战”范式转型;算法推荐带来的新旧宣传范式迭代,反思用户人为因素对“信息茧房”的影响;生成式人工智能对感官延伸到人类情感弥补具有重要影响,元宇宙进化了人类情感维度;人类感知和认知模式在智能传播时代迎来新转变,引导心理、社会、艺术研究路径发生变化;“新常人”推动传媒业和社会关系发生新变革,媒体行业结构遭遇新挑战;内容生产中的道德伦理与价值规范问题讨论延展到生成式人工智能领域,应尽快建立完善关于生成式人工智能内容生产相关法律法规;智能传播时代“数字遗民”的社会边缘化问题,以期对今后媒介技术研究有所助益。

关键词：大模型机器行为范式生成式人工智能算法推荐媒介伦理

The impact of^(60)Co-γirradiation on the chemical constituents of Chuanxiong Rhizoma

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Traditional Medicine Research 2024年第1期9卷 23-32页

作者： Ting-Ting Zhu Wei-Shan Qiu Rui Gu Shi-hong zhong School of Pharmacy Southwest Minzu UniversityChengdu 610041China School of Ethnic Medicine Chengdu University of Traditional Chinese MedicineChengdu 611137China

Background:In order to clarify the inmpat ofγirradiation on the chemical composition of traditional Chinese medicine,this paper carefully choosed Chuanxiong Rhizoma to carry on a demonstration ***:Through a meticulous assessment,a comprehensive comparison was made between the irradiated and unirradiated Chuanxiong Rhizoma *** property characteristics were investigated by colorimeter and electronic *** changes in chemical structures and contents was analyzed by fourier infrared spectroscopy,high performance liquid chromatography and *** a quest to uncover the presence of any new radiolysis products,cutting-edge techniques like ultra performance liquid chromatography-quadrupole-time of flight-mass spectrometry and gas chromatography-mass spectrometry were ***,the difference of antioxidant activity were ***:The irradiation doses within 12 kGy had no significant effects on the content of the main chemical components,characteristics and in vitro antioxidant activity of Chuanxiong Rhizoma,while changes in some functional groups and degradation of some volatile oil components containing olefins need further ***:This study indicates that^(60)Co-γirradiation is a stable method for sterilization of Chuanxiong ***’s also provide a reference for the establishment of irradiation standards for Chuanxiong Rhizoma and other aromatic medicinal plants.

关键词： ^(60)Co-γirradiation Chuanxiong Rhizoma chemical component comprehensive evaluation

超越“第二自我”的人机对话——基于AI大模型应用的信任关系探讨

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新闻大学 2024年第3期215卷 47-60,118,119页

作者：张洪忠任吴炯北京师范大学新闻传播学院北京100875

用户与大模型应用交互的本质是人与“众人”互动,超越了“第二自我”所定义的交互场景。本文主要讨论以下四个方面的问题。第一,分析了从大众媒体公信力到大模型应用信任的四个发展阶段,从时间维度考察了大模型信任的含义。第二,讨论了... 详细信息

用户与大模型应用交互的本质是人与“众人”互动,超越了“第二自我”所定义的交互场景。本文主要讨论以下四个方面的问题。第一,分析了从大众媒体公信力到大模型应用信任的四个发展阶段,从时间维度考察了大模型信任的含义。第二,讨论了基于大模型应用的信任内涵、外延与生成模式的变化与特点。第三,分析大模型应用信任带来的三种人机关系。第四,提出了基于大模型应用信任的三个值得思考的问题:人机伴侣关系中对大模型“众我的平庸”信任对个体认知的影响;用户对大模型的信任是否会加重用户网络化的个人中心主义;公众对大模型的信任是否会影响整体的社会资本。

关键词：大模型 “第二自我” 媒介信任人机信任