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Application of ^(18)F-fluorodeoxyglucose positron emission tomography/computed tomography imaging in recurrent anastomotic tumors after surgery in digestive tract tumors

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World Journal of Gastrointestinal Surgery 2024年第8期16卷 2474-2483页

作者： Deng-feng Ge Hao Ren Zi-Chen Yang Shou-Xiang Zhao zhen-Ting Cheng Da-Da Wu Bin Zhang Department of Cardiothoracic Surgery Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina Department of Gastrointestinal Surgery Shanghai Sixth People’s HospitalShanghai 250063China

BACKGROUND This study was to investigate the application value of whole-body dynamic ^(18)F-fluorodeoxyglucose(FDG)positron emission tomography/computed tomogra-phy(PET/CT)imaging in recurrent anastomotic tumors of digestive tract after gastric and esophageal cancer *** patients with gastric and esophageal cancer have a high risk of tumor recurrence,and traditional imaging methods have certain limitations in early detection of recurrent ***-body dynamic ^(18)F-FDG PET/CT imaging,due to its high sensitivity and specifi-city,can provide comprehensive information on tumor metabolic activity,which is expected to improve the early diagnosis rate of postoperative recurrent tumors,and provide an important reference for clinical treatment *** A retrospective analysis was performed on 53 patients with upper digestive tract tumors after operation and systemic dynamic ^(18)F-FDG PET/CT imaging indi-cating abnormal FDG uptake by anastomosis,including 29 cases of gastric cancer and 24 cases of esophageal *** to the follow-up results of gas-troscopy and other imaging examinations before and after PET/CT examination,the patients were divided into an anastomotic recurrence group and anastomotic inflammation *** multi-parameter analysis software was used to obtain the metabolic rate(MRFDG),volume of distribution maximum(DVmax)of anastomotic lesions,and MRmean and DVmean of normal liver *** lesion/background ratio(LBR)was calculated by dividing the MRFDG and DVmax of the anastomotic lesion by the MRmean and DVmean of the normal liver tissue,respectively,to obtain LBR-MRFDG and *** independent sample t test was used for statistical analysis,and a receiver operating characteristic curve was used to analyze the differential diagnostic efficacy of each parameter for anastomotic recurrence and *** The dynamic ^(18)F-FDG PET/CT imaging parameters MRFDG,DVmax,LBR-MRFDG,and LBR-DVmax of post

关键词： Gastric cancer Esophageal cancer Anastomosis Dynamic positron emission tomography Differential diagnosis Metabolic rate

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Epidemiological Characteristics of Human Parainfluenza Viruses Infections-China,2019-2023

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China CDC weekly 2024年第12期6卷 235-241,I0003,I0004页

作者： Yixuan Gao Yingwei Ma Daxing feng feng Zhang Biao Wang Xiaoqing Liu Bing Zhu Hui Xie Linqing Zhao Xiaoru Long Ying Chen Bing Wang Jie Jiang zhen Zhu Yan Zhang Aili Cui Baicheng Xia Naiying Mao National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina Precision Medicine Research Center Children’s Hospital of ChangchunChangchun CityJilin ProvinceChina Henan Provincial Center for Disease Control and Prevention Zhengzhou CityHenan ProvinceChina Laboratory of Viral Diseases Qingdao Municipal Centre for Disease Control and PreventionQingdao CityShandong ProvinceChina Virus Laboratory Gansu Provincial Center for Disease Control and PreventionLanzhou CityGansu ProvinceChina Jiangxi Provincial Center for Disease Control and Prevention Nanchang CityGansu ProvinceChina Virus Laboratory Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhou CityGuangdong ProvinceChina Institute for Immunization and Prevention Beijing Center for Disease Prevention and ControlAcademy for Preventive MedicineInstitute of Tuberculosis Control Research and PreventionBeijingChina Laboratory of Virology Beijing Key Laboratory of Etiology of Viral Diseases in ChildrenCapital Institute of PediatricsBeijingChina Department of Infection Children’s Hospital of Chongqing Medical UniversityChongqingChina Inner Mongolia Autonomous Region Comprehensive Center for Disease Control and Prevention Hohhot CityInner Mongolia Autonomous RegionChina Shenyang Prefecture Center for Disease Control and Prevention Shenyang CityLiaoning ProvinceChina

Introduction:A retrospective study based on sentinel surveillance was conducted in 10 provinciallevel administrative divisions(PLADs)in China to enhance the understanding of the epidemiological characteristics of human parainfluenza viruses(HPIVs).Methods:From January 2019 to June 2023,respiratory specimens were collected from individuals with acute respiratory infections(ARIs)and screened for four HPIVs serotypes and other common respiratory viruses using multiplex real-time polymerase chain reaction(PCR).This study analyzed the association of HPIVs infections with seasonal patterns,geographical distribution,demographic profiles,clinical features,and co-infection ***:During the study period,a total of 12,866 ARIs were *** overall detection rate of HPIVs was 6.15%,varying from 5.04%in 2022 to 9.70%in *** median age of HPIVs-infected patients was 3 ***2 was more prevalent among individuals aged 5–17 years(42.57%),while HPIV4 was more common in those over 65 years(12.24%).HPIV3(54.16%)and HPIV1(27.18%)were the predominant serotypes,and their prevalence exhibited significant seasonal fluctuations postcoronavirus disease 2019(COVID-19)*** peak of HPIV3 shifted three months later in 2020 compared to 2019 and returned to a summer peak *** peaks of HPIV1 were observed in 2021 following the peak of ***,coinfections were frequent in HPIVs cases(overall rate:22.12%),with human rhinovirus being the most common co-infecting ***:The prevalence of HPIVs in China was predominantly due to HPIV3 and HPIV1,and their seasonal patterns were altered by pandemic ***,continuous surveillance of HPIVs is essential.

关键词： prevalence seasonal Human

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陡坡带砂砾岩体储集特征研究——以车镇凹陷北带为例

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中国海洋大学学报（自然科学版） 2011年第6期41卷 93-96页

作者：范振峰张金亮王金凯中国海洋大学海洋地球科学学院山东青岛266100 中国石化胜利油田分公司地质科学研究院山东青岛257015

箕状断陷盆地陡坡带发育有大规模的砂砾岩体,紧邻生油洼陷,是油气运移的主要指向,蕴藏着巨大的勘探潜力。由于砂砾岩体多属于近源快速堆积的产物,成岩作用强烈,储集物性普遍偏差,多数探井因此而失利,因此,分析砂砾岩体储层的成因机理,... 详细信息

箕状断陷盆地陡坡带发育有大规模的砂砾岩体,紧邻生油洼陷,是油气运移的主要指向,蕴藏着巨大的勘探潜力。由于砂砾岩体多属于近源快速堆积的产物,成岩作用强烈,储集物性普遍偏差,多数探井因此而失利,因此,分析砂砾岩体储层的成因机理,寻找有利的储集相带,对勘探有着至关重要的影响。本文以车镇凹陷北带砂砾岩体为例,通过分析化验与地质分析相结合的方法,表明次生孔隙与裂缝是主要储集空间类型,主要受到有机酸的溶蚀作用与异常高压的影响;通过对沉积作用的分析,明确了各类扇体的有利储集相带,指出了下一步的勘探方向。

关键词：陡坡带砂砾岩体储集物性溶蚀作用异常高压沉积作用

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Brake Discs Surface Defect Detection Using the IGD-IHT Algorithm and the PIQEDS-ISSA-NESN Algorithm

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Instrumentation 2024年 62-73页

作者： feng Li zhen Yu Juan Gao Qi An Haier School(Electromechanical School) Qingdao Technical College Institute of Oceanographic Instrumentation Qilu University of Technology (Shandong Academy of Sciences) State Key Laboratory of Precision Measuring Technology and Instrument Tianjin University School of Informatics Qingdao Technical College Department of Mechanical Engineering Tsinghua University

As one of the core parts,the brake discs directly impact the braking and safety performance of *** surface detection methods of the brake disc have poor robustness due to their reliance on manual feature extraction.A detection instrument was designed to focus on the *** features were extracted using the improved Gaussian difference algorithm and Hough transform algorithm(IGD-IHT).An identification method for brake disc surface defects was designed in this paper based on the Perception-based Image Quality Evaluator and Dempster rule-improved sparrow search algorithm-Nonlinear echo state network(PIQEDS-ISSA-NESN) to better *** was shown in the experiment that the accuracy was more than 97%,the false alarm rate was less than 1.5%,and the false alarm rate was less than 1.5%.

关键词：

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Driving Factors of Coordinated Development in Chinese Border Cities:A Case Study of Lincang City in Southwest China

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Journal of Resources and Ecology 2024年第4期15卷 951-965页

作者： XU Bingjie YOU zhen feng Zhiming LIAN Chenqin QI Wei YOU Shiqing fan Feifei Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China

In the context of the“Belt and Road Initiative”,the sustainable development of border cities is paramount for facilitating intergovernmental *** the system dynamics approach,we integrated border policy factors to create the Border City Coordinated Development(BCCD-SD)model,encompassing three dimensions:Economic,Social,and ***,a comprehensive evaluation indicator,the City Coordinated Development Index(CCDI),was *** Lincang City in Southwest China as a case study,this article examines the trends in city development under three scenarios:Inertial Development,Rapid Development,and Green *** research findings demonstrate that the model adeptly captures trends in the city coordinated development *** the three scenarios,the rapid development scenario stands out,yielding the most favorable economic indicators,superior public infrastructure,and the highest employed ***,the rapid development path,which is heavily focused on economic growth,intensifies resource and environmental pressures,giving rise to sustainability *** contrast,although the green development scenario trails slightly in economic performance compared to rapid development,it fosters a larger urban population and transition of the employed population into citizens while excelling in resource and environmental ***,the CCDI attains its highest score under the green development scenario,surpassing those of rapid and inertia development,signifying superior city development coordination along the green *** scenario effectively combines economic growth,social progress,and resource-environment *** study also emphasizes the pivotal role of ports in the coordinated development of border cities and underscores the necessity of expediting the transition from a“gateway”economy to a“port+”*** objective of this article is to encourage border cities to serve as more effective windows to th

关键词： system dynamics Lincang City coordinated development border policy Southwest China border

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涵道螺旋桨多工况设计

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科学技术与工程 2024年第15期24卷 6510-6517页

作者：孔繁杰冯振宇中国民航大学安全科学与工程学院天津300300

单一工况下设计的涵道螺旋桨通常不能满足垂直起降飞机的多工况高效需求。基于叶素动量理论可以开展涵道螺旋桨多工况设计,其关键在于不同工况下螺旋桨拉力占比、修正来流速度的计算。在无螺旋桨几何的情况下,采用动量源方法对涵道拉力... 详细信息

单一工况下设计的涵道螺旋桨通常不能满足垂直起降飞机的多工况高效需求。基于叶素动量理论可以开展涵道螺旋桨多工况设计,其关键在于不同工况下螺旋桨拉力占比、修正来流速度的计算。在无螺旋桨几何的情况下,采用动量源方法对涵道拉力进行估算,提出了修正来流速度的计算方法,基于最小能量损失原则建立螺旋桨几何,采用多重参考系方法进行耦合计算流体力学(computational fluid dynamics,CFD)修正,得到单一工况下弦长扭转角关系、螺旋桨拉力占比以及修正来流速度。通过改变设计升力系数及转速,使不同工况下涵道螺旋桨的弦长及扭转角相匹配。分析结果表明,动量源方法计算的涵道拉力占比较大,来流速度修正方法可减少相同工况下耦合CFD求解计算量。多工况设计可有效提高涵道螺旋桨的综合效率。

关键词：涵道螺旋桨叶素动量理论修正设计多工况气动特性

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基于VMD-ICA的水下激光雷达抗散射信号处理方法

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物理学报 2024年第9期73卷 110-115页

作者：李朝锋王振刘欣宇杨苏辉徐震樊超阳北京理工大学光电学院北京100081 中国电子科技集团公司第三十四研究所桂林541000

提出一种基于变分模态分解(VMD)与独立元分析(ICA)相结合的水下信号处理方法.该方法运用VMD将一组回波信号分解为多组按照频率高低顺序排列的本征模态信号.然后,将这些模态信号作为ICA的观测矩阵,以确保分离所得目标回波信号的完整性.... 详细信息

提出一种基于变分模态分解(VMD)与独立元分析(ICA)相结合的水下信号处理方法.该方法运用VMD将一组回波信号分解为多组按照频率高低顺序排列的本征模态信号.然后,将这些模态信号作为ICA的观测矩阵,以确保分离所得目标回波信号的完整性.该方法提出将分解所得的各层模态信号与原信号进行相关性和信杂比比较,以确定其分解层数.应用ICA方法对散射与目标回波进行分离,从而恢复强散射水体中的微弱目标回波,大大提高其测距精度.进行不同衰减长度水体的532 nm调频连续光水下测距实验.经实验验证,该信号处理方法在激光输出功率2.3 W时,成功实现对9个衰减长度内目标的测量,使用算法将测距精度由16 cm提升至5 cm以内.

关键词：变分模态分解独立元分析频谱反馈

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Spatial structural characteristics of the Deda ancient landslide in the eastern Tibetan Plateau:Insights from Audio-frequency Magnetotellurics and the Microtremor Survey Method

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China Geology 2024年第2期7卷 188-202页

作者： zhen-dong Qiu Chang-bao Guo Yi-ying Zhang Zhi-hua Yang Rui-an Wu Yi-qiu Yan Wen-kai Chen feng Jin Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Faculty of Engineering China University of GeosciencesWuhan 430074China Key Laboratory of Active Tectonics and Geological Safety Ministry of Natural ResourcesBeijing 100081China Research Center of Neotectonism and Crustal Stability China Geological SurveyBeijing 100081China China Water Resources Beifang Investigation Design and Research Co.Ltd.Tianjin 300222China

It is of crucial importance to investigate the spatial structures of ancient landslides in the eastern Tibetan Plateau’s alpine canyons as they could provide valuable insights into the evolutionary history of the landslides and indicate the potential for future *** study examines the Deda ancient landslide,situated in the Chalong-ranbu fault zone,where creep deformation suggests a complex underground *** integrating remote sensing,field surveys,Audio-frequency Magnetotellurics(AMT),and Microtremor Survey Method(MSM)techniques,along with engineering geological drilling for validation,to uncover the landslide’s spatial feature *** research indicates that a fault is developed in the upper part of the Deda ancient landslide,and the gully divides it into Deda landslide accumulation zoneⅠand Deda landslide accumulation zoneⅡin *** distinctive geological characteristics detectable by MSM in the shallow subsurface and by AMT in deeper *** findings include the identification of two sliding zones in the Deda I landslide,the shallow sliding zone(DD-I-S1)depth is approximately 20 m,and the deep sliding zone(DD-I-S2)depth is 36.2-49.9 *** sliding zone(DD-Ⅱ-S1)depth of the DedaⅡlandslide is 37.6-43.1 m.A novel MSM-based method for sliding zone identification is proposed,achieving less than 5%discrepancy in depth determination when compared with drilling *** results provide a valuable reference for the spatial structural analysis of large-deepseated landslides in geologically complex regions like the eastern Tibetan Plateau.

关键词： Ancient landslide Remote sensing Audio-frequency Magnetotellurics(AMT) Microtremor Survey Method(MSM) Geological drilling engineering Spatial structure Tibetan Plateau Geological hazard survey engineering

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Dynamic Sulfur-Rich Polymers from Elemental Sulfur and Epoxides

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Chinese Journal of Polymer Science 2024年第10期42卷 1479-1487,I0010页

作者： Ke-Xiang Chen Chen-Hui Cui zhen Li Ting Xu Hao-Qing Teng Zhi-Yuan He Yin-Zhou Guo Xiao-Qing Ming Zhi-Shen Ge Yan-feng Zhang Tie-Jun Wang School of Chemistry Engineering Research Center of Energy Storage Materials and DevicesMinistry of EducationXi’an Jiaotong UniversityXi’an710049China State Key Lab for Strength and Vibration of Mechanical Structures Department of Engineering MechanicsXi’an Jiaotong UniversityXi’an710049China

Sulfur-containing dynamic polymers had attracted significant attention due to their unique chemical structures with high *** sulfur, an inexpensive industrial waste product, to synthesize dynamic polysulfide polymers through reverse vulcanization has been a notable approach. However, this method required high temperatures and resulted in the release of unpleasant oders. In this study, we presented a robust method for the preparation of sulfur-rich polymers with dynamic polysulfide bonds from elemental sulfur and inexpensive epoxide monomers via a one-pot strategy at the mild room temperature. Different types of polysulfide molecules and polymers were synthesized by reacting various epoxide compounds with sulfur, along with the investigation of their structures and dynamic behaviors. It was noteworthy that the obatined polymers prepared from m-(2,3-epoxypropoxy)-N,N-bis(2,3-epoxypropyl)aniline and elemental sulfur exhibit multiple dynamic behaviors, including polysulfide metathesis and polysulfide-thiol exchange, enabling their rapid stress relaxation, self-healing, reprocessing and degradable properties of the cross-linked polymer. More importantly, the hydroxyl groups at the side chains from epoxide ring opening exhibited potential transesterification. This work provided a facile strategy for designing dynamic sulfur-rich polymers via a mild synthesis route.

关键词： Elemental sulfur Sulfur-containing polymer Dynamic covalent bond Dynamic polymer

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The dynamic catalysis of Ga/ZSM-5 catalysts for propane-CO_(2) coupling conversion to aromatics and syngas

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Journal of Energy Chemistry 2024年第10期97卷 513-519,I0011页

作者： Yonggui Song Zhong-Pan Hu Haohao feng Enze Chen Le Lv Yimo Wu zhen Liu Yong Jiang Xiaozhi Su Feifei Xu Mingchang Zhu Jingfeng Han Yingxu Wei Svetlana Mintova Zhongmin Liu The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry Shenyang University of Chemical TechnologyShenyang110142LiaoningChina National Engineering Research Center of Lower-Carbon Catalysis Technology Dalian National Laboratory for Clean EnergyiChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201203China Normandie University Laboratory of Catalysis and Spectrochemistry(LCS)NSICAENUNICAENCNRSCaen 1450France

Alkane coupling with CO_(2) by metal-containing zeolites catalysis is found to be a promising way to produce aromatics and syngas in recent years,but the real active sites and the role of CO_(2) are still unclear owing to the quick evolution of the metallic active sites and the complex reaction processes including direct propane aromatization,CO_(2) hydrogenation,reverse water-gas shift reaction,and propane-CO_(2) coupling ***,Ga/ZSM-5 catalysts were constructed to study the dynamic evolution of the metallic active sites and the role of CO_(2) during the propane and CO_(2) coupling *** optimizing the reaction conditions,a notable propane conversion rate of 97.9%and an impressive aromatics selectivity of 80.6%in hydrocarbons can be achieved at the conditions of 550℃and CO_(2)/C_(3)H_(8) of 4.^(13)CO_(2)isotope experiments illustrate that C-atoms of CO_(2) can enter into CO(86.5%)and aromatics(10.8%)during the propane-CO_(2) coupling reaction *** situ XANES and FTIR spectroscopies at 550℃and H_(2)/C_(3)H_(8) atmosphere reveal that GaO_(x) species can be gradually dispersed into[GaH_(2)]^(+)/[GaH]^(2+)on the Bronsted acid sites of ZSM-5 zeolite during H_(2) and/or C_(3)H_(8) treatment,which are the real active sites for propane-CO_(2) coupling *** situ CO_(2)-FTIR experiments demonstrate that the[GaH_(2)]^(+)/[GaH]^(2+)species can react with CO_(2) and accelerate the propane and CO_(2) coupling *** work not only presents a cost-effective avenue for CO_(2) utilization,but also contributes to the active site design for improved alkane and CO_(2) activation in coupling reaction system.

关键词： Carbon dioxide Propane aromatization Ga/ZSM-5 Gallium hydride Spectroscopy

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