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To explore the pathogenesis of anterior resection syndrome by magnetic resonance imaging rectal defecography

World Journal of Gastrointestinal Surgery 2024年第2期16卷 529-538页

作者： Ling-Hou Meng Xian-Wei Mo Bing-Yu Yang Hai-Quan Qin qing-zhou song Xin-Xin He Qiang Li Zheng Wang Chang-Lin Mo Guo-Hai Yang Department of Gastrointestinal Surgery Guangxi Clinical Research Center for Colorectal CancerGuangxi Medical University Cancer HospitalNanning 530021Guangxi Zhuang Autonomous RegionChina Department of Colorectal and Anal Surgery Guangxi Medical University Cancer HospitalNanning 530021Guangxi Zhuang Autonomous RegionChina Department of Radiology Guangxi Medical University Cancer HospitalNanning 530021Guangxi Zhuang Autonomous RegionChina First Department of Chemotherapy Guangxi Medical University Cancer HospitalNanning 530021Guangxi Zhuang Autonomous RegionChina

BACKGROUND Over 90%of rectal cancer patients develop low anterior resection syndrome(LARS)after sphincter-preserving *** current globally recognized evaluation method has many drawbacks and its subjectivity is too strong,which hinders the research and treatment of *** To evaluate the anorectal function after colorectal cancer surgery by quantifying the index of magnetic resonance imaging(MRI)defecography,and pathogenesis of *** We evaluated 34 patients using the standard LARS score,and a new LARS evaluation index was established using the dynamic images of MRI defecography to verify the LARS *** In the LARS score model,there were 10(29.41%)mild and 24(70.58%)severe cases of *** comparison of defecation rate between the two groups was 29.36±14.17%versus 46.83±18.62%(P=0.004);and MRI-rectal compliance(MRI-RC)score was 3.63±1.96 versus 7.0±3.21(P=0.001).Severe and mild LARS had significant differences using the two evaluation *** was a significant negative correlation between LARS and MRI-RC score(P<0.001),and they had a negative correlation with defecation rate(P=0.028).CONCLUSION MRI defecography and standard LARS score can both be used as an evaluation index to study the pathogenesis of LARS.

关键词： Anterior resection syndrome Colorectal cancer Diagnostic evaluation system Magnetic resonance imaging defecography Pathogenesis

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中承式拱桥吊杆更换施工监控研究

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建筑技术开发 2024年第2期51卷 105-107页

作者：周青松上海市建筑科学研究院有限公司上海200032

吊杆是中承式拱桥的主要受力与传力结构,但易损坏,因此桥梁加固工程时常涉及到吊杆更换。为确保结构安全与更换质量控制,在吊杆更换施工时需对主体结构变形、吊杆力等进行监控。以一座中承式拱桥吊杆更换为例,采用位移影响矩阵法,通过... 详细信息

吊杆是中承式拱桥的主要受力与传力结构,但易损坏,因此桥梁加固工程时常涉及到吊杆更换。为确保结构安全与更换质量控制,在吊杆更换施工时需对主体结构变形、吊杆力等进行监控。以一座中承式拱桥吊杆更换为例,采用位移影响矩阵法,通过仿真计算,对吊杆更换全过程进行监控,保证施工安全与质量,更换完成之后的结构线形、吊杆力等测量结果显示都满足相关要求,可为其他类似工程提供一定的参考。

关键词：中承式拱桥吊杆更换施工监控

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毫米波雷达在桥梁智慧化监测中的应用研究

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智能建筑与智慧城市 2024年第4期 163-165页

作者：周青松秦明霞上海市建筑科学研究院有限公司上海市工程结构安全重点实验室

文章利用毫米波雷达技术对某系杆拱桥的动挠度、基频进行运营期智慧化在线监测,并与现有其他非在线测量结果进行比对分析,验证毫米波雷达在桥梁监测中应用的可靠性。通过对比毫米波雷达与光电挠度仪的动挠度测试结果,与加速度传感器的... 详细信息

文章利用毫米波雷达技术对某系杆拱桥的动挠度、基频进行运营期智慧化在线监测,并与现有其他非在线测量结果进行比对分析,验证毫米波雷达在桥梁监测中应用的可靠性。通过对比毫米波雷达与光电挠度仪的动挠度测试结果,与加速度传感器的基频测试结果,表明毫米波雷达在桥梁动挠度、基频监测的测试结果是可靠的,研究成果可为类似工程提供参考。

关键词：毫米波雷达监测动挠度基频

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基于梁端位移的支座滑动性能评估研究

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浙江交通职业技术学院学报 2024年第1期25卷 7-12页

作者：周青松畅卫杰秦明霞上海市建筑科学研究院有限公司上海200032 浙江舟山跨海大桥有限公司浙江舟山316031

滑动支座是大跨径悬索桥的重要构件,需定期对其工作状态进行评估,而人工定期检测周期长、检测结果主观性强,很难对支座的状态做出实时、定量的判断,桥梁管养机构迫切需要有效的方法对支座的滑动工作状态进行实时评估。梁端的位移变化规... 详细信息

滑动支座是大跨径悬索桥的重要构件,需定期对其工作状态进行评估,而人工定期检测周期长、检测结果主观性强,很难对支座的状态做出实时、定量的判断,桥梁管养机构迫切需要有效的方法对支座的滑动工作状态进行实时评估。梁端的位移变化规律表征了桥梁支座滑动性能的健康状态,该参数可以利用桥梁健康监测系统采集获取。本文基于桥梁健康监测系统中的梁端位移和环境温度监测数据,通过相关性分析方法,并与理论计算结果进行对比,实时评判支座的滑动性能,对滑动异常情况及时预警,所采用的支座滑动性能评估方法简单实用,在大跨度悬索桥支座的运营养护中具有较高的参考价值。

关键词：悬索桥健康监测系统滑动性能相关性分析

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A joint optimization algorithm for focused energy delivery in precision electronic warfare

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Defence Technology（防务技术） 2022年第4期18卷 709-721页

作者： Zhong-ping Yang Shu-ning Yang qing-song zhou Jian-yun Zhang Zhi-hui Li Zhong-rui Huang College of Electronic Engineering National University of Defense TechnologyHe FeiChina

Focused energy delivery(FED) is a technique that can precisely bring energy to the specific region,which arouses wide attention in precision electronic warfare(PREW).This paper first proposes a joint optimization model with respect to the locations of the array and the transmitted signals to improve the performance of *** the problem is nonconvex and NP-hard,particle swarm optimization(PSO) is adopted to solve the locations of the array,while designing the transmitted signals under a feasible array is considered as a unimodular quadratic program(UQP) subproblem to calculate the fitness criterion of *** the PSO-UQP framework established,two methods are presented for the UQP subproblem,which are more efficient and more accurate respectively than previous ***,a threshold value is set in the framework to determine which method to adopt to take full advantages of the methods ***,we obtain the maximum localization error that FED can tolerate,which is significant for implementing FED in *** results are provided to demonstrate the effectiveness of the joint optimization algorithm,and the correctness of the maximum localization error derived.

关键词： Focused energy delivery Localization error Particle swarm optimization Precision electronic warfare Unimodular quadratic program

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基于贯穿式实践的创造性思维培养——以“天线与电波传播”课程为例

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教育教学论坛 2024年第4期 5-8页

作者：孙志勇吴伟牛朝阳周青松国防科技大学电子对抗学院安徽合肥230037

高阶思维尤其是创造性思维的培养,是现代素质教育的核心部分,是贯彻以学生发展为中心教育理念的基本要求,是“双一流”高校教学改革的一个重要方面,是知识、能力和素养“三位一体”培养目标的重要体现。在分析创造性思维内涵的基础上,... 详细信息

高阶思维尤其是创造性思维的培养,是现代素质教育的核心部分,是贯彻以学生发展为中心教育理念的基本要求,是“双一流”高校教学改革的一个重要方面,是知识、能力和素养“三位一体”培养目标的重要体现。在分析创造性思维内涵的基础上,以“天线与电波传播”课程中的贯穿式实践项目对数周期天线设计为例,结合课程特点,介绍了贯穿式实践项目的具体实施方法,并探讨了实践项目对创造性思维培养的支撑作用和实现方法。

关键词：高阶思维创造性思维贯穿式实践天线与电波传播

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One-pot Synthesis of MoO_(3)/PI Composite with Enhanced Photocatalytic Performance for Oxidative Coupling of Amines to Imines

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China Petroleum Processing & Petrochemical Technology 2024年第2期26卷 57-71页

作者： Zhao Wenjie Du Chengxin song Yu zhou Yafen Wang qing zhou Limei Xu Bin Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchongChina Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science&EngineeringZigongChina

Organic-inorganic MoO_(3)/PI(MoPI)composites were prepared using a simple one-pot thermal copolymerization *** resulting composites exhibited enhanced photocatalytic activity for the selective oxidation of benzylamine to N-benzylidene benzylamine(N-BDBA)in ambient air under simulated solar light irradiation compared to pristine MoO_(3) or polyimide(PI).In particular,the MoPI composite with a 0.3:1 molar ratio of Mo to melamine,referred to as MoPI-0.3,demonstrated the best performance in the photo-oxidation of benzylamine,achieving a benzylamine conversion of 95%with a N-BDBA selectivity exceeding 99%after 3 h *** enhanced photocatalytic activity of the MoPI-0.3 catalyst was attributed to the formation of a direct Z-scheme heterojunction between MoO_(3) and PI,facilitating more efficient separation of the photoinduced electrons and ***,the MoPI-0.3 composite maintained considerably high activity over four consecutive cycles,highlighting its good stability and ***,the MoPI-0.3 composite could photo-oxidize benzylamine derivatives and heterocyclic amines to their corresponding imines,demonstrating the universal applicability of this composite catalyst.

关键词： MoO3/PI composite photocatalysis amine oxidation imine

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Significant lake expansion has accelerated permafrost degradation on the qinghai-Tibet Plateau

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Journal of Mountain Science 2024年第1期21卷 68-83页

作者： LI qingpeng LIU Wenhui LIU Hairui zhou Guanghao song Xianteng LI qing LUO Bingnan song Bangxu ZHANG Qi Department of Geological Engineering Qinghai UniversityXining 810016China College of Eco-Environmental Engineering Qinghai UniversityXining 810016China Xining Center for Integrated Natural Resources Survey China Geological SurveyXining 810000China

In recent years, lakes on the qinghai-Tibet Plateau have become more responsive to climate change. In September 2011, Zonag Lake in Hoh Xil experienced sudden drainage, the water eventually flowed into Yanhu Lake, which caused Yanhu Lake to continue to expand. The potential collapse of Yanhu Lake could directly threaten the operational safety of the adjacent qinghai-Tibet Highway, qinghai-Tibet Railway. To explore the implications of expanding lakes on the surrounding permafrost, we selected Hoh Xil Yanhu Lake on the qinghai-Tibet Plateau to study the effect of lake expansion on permafrost degradation. The permafrost degradation in the Yanhu Lake basin from October 2017 to December 2022 was inverted using Sentinel-1 satellite image data and small baseline subset interferometry synthetic aperture radar(SBAS-In SAR) technology. Additionally, permafrost degradation from February 2007 and February 2010 was analyzed using advanced land observing satellite phased array-type L-band synthetic aperture radar(ALOS PALSAR) satellite images and differential interferometric synthetic aperture radar(D-In SAR) technique. The results showed that the permafrost around Yanhu Lake experienced accelerated degradation. Prior to the expansion of Yanhu Lake, the average annual deformation rate along the line of sight(LOS) direction was 6.7 mm/yr. After the expansion, the rate increased to 20.9 mm/yr. The integration of spatial-temporal distribution maps of surface subsidence, Wudaoliang borehole geothermal data, meteorological data, Yanhu Lake surface area changes, and water level changes supports the assertion that the intensified permafrost degradation could be attributed to lake expansion rather than the rising air temperature. Furthermore, permafrost degradation around Yanhu Lake could impact vital infrastructure such as the adjacent qinghai-Tibet Highway and qinghai-Tibet Railway.

关键词： Lake expansion SBAS-InSAR D-InSAR Permafrost deformation qinghai-Tibet Plateau

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Open-Shell Oligomers and Polymers: Theory, Characterization Methods, Molecular Design, and Applications

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Chinese Journal of Polymer Science 2024年第4期42卷 417-436页

作者： Xue-qing Wang Cheng song Ting Lei Key Laboratory of Polymer Chemistry and Physics(Ministry of Education) School of Materials Science and EngineeringPeking UniversityBeijing100871China

Open-shell oligomers and polymers have exhibited intriguing electronic and magnetic properties, making them highly desirable for a wide range of applications, including ambipolar organic field-effect transistors (OFETs), photodetectors, organic thermoelectrics, and spintronics. Although open-shell ground states have been observed in certain small molecules and doped organic semiconductors, the exploration of open-shell ground-state conjugated polymers is still limited, and the strategies for designing these polymers remain obscure. This review aims to briefly introduce the theory and characterization methods of open-shell conjugated polymers, along with an overview of recent progress and applications. The objective is to stimulate further advancements and investigations in this promising area by shedding light on the potential of open-shell conjugated polymers and the challenges that lie ahead.

关键词： Conjugated polymers Open-shell molecules High-spin ground state Donor-acceptor(D-A)polymers Optoelectronic and magnetic properties

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Optimizing high-coordination shell of Co-based single-atom catalysts for efficient ORR and zinc-air batteries

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Journal of Energy Chemistry 2024年第8期95卷 306-314,I0007页

作者： Yugang Qi qing Liang Kexin song Xinyan zhou Meiqi Liu Wenwen Li Fuxi Liu zhou Jiang Xu Zou Zhongjun Chen Wei Zhang Weitao Zheng Key Laboratory of Automobile Materials MOE School of Materials Science&Engineering Electron Microscopy Centerand International Center of Future ScienceJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchun 130012JilinChina Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Atom-level modulation of the coordination environment for single-atom catalysts(SACs)is considered as an effective strategy for elevating the catalytic *** the MNxsite,breaking the symmetrical geometry and charge distribution by introducing relatively weak electronegative atoms into the first/second shell is an efficient way,but it remains challenging for elucidating the underlying mechanism of ***,a practical strategy was reported to rationally design single cobalt atoms coordinated with both phosphorus and nitrogen atoms in a hierarchically porous carbon derived from metal-organic frameworks.X-ray absorption spectrum reveals that atomically dispersed Co sites are coordinated with four N atoms in the first shell and varying numbers of P atoms in the second shell(denoted as Co-N/P-C).The prepared catalyst exhibits excellent oxygen reduction reaction(ORR)activity as well as zinc-air battery *** introduction of P atoms in the Co-SACs weakens the interaction between Co and N,significantly promoting the adsorption process of ^(*)OOH,resulting in the acceleration of reaction kinetics and reduction of thermodynamic barrier,responsible for the increased intrinsic *** discovery provides insights into an ultimate design of single-atom catalysts with adjustable electrocatalytic activities for efficient electrochemical energy conversion.

关键词： Electrocatalytic Oxygen reduction reaction Single atom catalyst Shell coordination optimization

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