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Lead helix winding tricuspid chordae tendineae: A case report

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World Journal of Clinical Cases 2023年第30期11卷 7393-7397页

作者： teng-fei Liu Chun-Hua Ding Cardiac Department Aerospace Center HospitalPeking University Aerospace School of Clinical MedicineBeijing 100049China

BACKGROUND As left bundle branch pacing(LBBP)is more like physiological pacing,LBBP has emerged as a novel pacing strategy that uses the native conduction system to improve ventricular synchronization with stable pacing *** has been revealed associated with a significantly reduced risk of new-onset atrial fibrillation and heart failure compared with conventional permanent pacemaker *** SUMMARY A 64-year-old man was admitted with a 24-h history of chest distress and shortness of breath,which continued *** patient had no symptoms of chest pain,dizziness,syncope,nausea nor *** were no abnormalities found in routine examinations after ***-lead electrocardiogram presented a result of 2:1 atrioventricular *** angiography was performed the next day and no abnormality was ***,the patient agreed to received LBBP and signed the informed *** the process of withdrawing the Medtronic Model 3830 lead into sheath,we found the lead helix was wrapped around the chordae tendineae of the septal valve of *** to rotate the 3830 lead failed to release the lead helix from the chordae tendineae,and ultimately we used radiofrequency ablation to ablate the wrapped chordae *** Radiofrequency ablation effectively solved this problem without *** is an effective and reliable method to resolve lead winding chordae.

关键词： Pacemaker,Left bundle branch pacing Lead Tricuspid Chordae tendineae Radiofrequency ablation Case report

Improved maceration techniques to study the fruit vascular anatomy of grape

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Horticultural Plant Journal 2023年第3期9卷 481-495页

作者： Zhaosen Xie teng fei Charles F.Forney Youmei Li Bo Li College of Horticulture and Plant Protection Yangzhou UniversityYangzhouJiangsu225009China Kentville Research and Development Centre Agriculture and Agri-Food CanadaKentvilleNova ScotiaB4N 1J5Canada Shandong Academy of Grape JinanShandong 250199China

The visualization and evaluation of fruit vascular bundles in grape are indispensable for understanding the development and growth of the fruit. The vascular bundles in grape are as thin as human hair, and strongly adhere to flesh cells, making it difficult to isolate individual intact vessel elements. Currently there is little information about methods to characterize grape vascular tissue. In this study, we describe an easy and effective technique to visualize the xylem cell structure of the ‘Red Globe' grape(Vitis L.). The intact vascular bundles of the grape were isolated through enzymatic degradation of flesh cells by hydrolases which were effective in removing flesh cells from vascular bundles. This enabled the illustration of the fine surface structure of vessel elements and their arrangement in the vascular bundles of the grape. This modified method to separate the vascular bundles into individual vessel elements was more effective than former methods of manually shaking to isolate individual vessels. Clear images of xylem vessel arrangement and structural characteristics of individual vessel element were acquired by light microscopy(BX51, Olympus, Tokyo, Japan), transmission electron microscopy(Tecnai 12, Philips, Netherlands) and scanning electron microscopy(GeminiSEM 300, Carl Zeiss, Germany). In addition, the 3D structure of vessel elements was observed using confocal laser scanning microscopy(Zeiss: model: LSM-880, Oberkochen, Germany). The imaging techniques for visualizing and analyzing the structure of xylem vessels in grape described in this study are an improvement of past methods. An effective method to isolate grape vascular bundles from flesh cells was also developed, which enables the imaging of the fine surface structure of vessel elements and their arrangement in grape vascular bundles. By adjusting the process of maceration of vascular bundles, an easy and effective method was developed to gently disrupt the plant tissue and isolate individu

关键词： Grape Fruit Vascular bundle Vessel element Maceration Anatomy

Immunotherapy in liver transplantation for hepatocellular carcinoma:Pros and cons

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World Journal of Gastrointestinal Oncology 2022年第1期14卷 163-180页

作者： Yi Luo fei teng Hong Fu Guo-Shan Ding Department of Liver Surgery and Organ Transplantation Changzheng HospitalNaval Medical UniversityShanghai 200003China

Liver transplantation(LT)has emerged as a curative strategy for hepatocellular carcinoma(HCC),but contributes to a higher predisposition to HCC recurrence in the immunosuppression context,especially for tumors beyond the Milan *** immunotherapy has dramatically improved survival for immunocompetent patients and has become the standard of care for a variety of tumors,including HCC,it is mainly used outside the scope of organ transplantation owing to potentially fatal allograft ***,accumulative evidence has expanded the therapeutic paradigms of immunotherapy for HCC,from downstaging or bridging management in the pretransplant setting to the salvage or adjuvant strategy in the posttransplant ***,immunotherapy mainly includes immune checkpoint inhibitors(ICIs),adoptive cell transfer(ACT)and vaccine ***,followed by ACT,have been most investigated in LT,with some promising *** of the complex tumor microenvironment and immunoreactivity when immunosuppressants are combined with immunotherapy,it is difficult to reach formulations for immunosuppressant adjustment and the optimal selection of immunotherapy as well as *** addition,the absence of effective biomarkers for identifying rejection and tumor response is still an unresolved barrier to successful clinical immunotherapy applications for *** this review,we comprehensively summarize the available evidence of immunotherapy used in LT that is specific to ***,we discuss clinically concerning issues regarding the concurrent goals of graft protection and antitumor response.

关键词： Hepatocellular carcinoma Liver transplantation Immunotherapy Immune checkpoint inhibitors Adoptive cell transfer Immunosuppressant

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王明喜教授治疗陈旧性踝关节扭伤经验

内蒙古中医药 2024年第3期43卷 82-84页

作者：于腾飞王明喜周斌山东中医药大学第一临床医学院山东济南250014 山东省中医院显微骨科山东济南250014

踝关节扭伤是常见的运动损伤,若处理不当,易遗留踝关节疼痛、行走不稳等后遗症,给患者带来诸多痛苦。王明喜教授总结多年临床经验,认为该病的病机为损伤日久,以致血气阻滞不通,气滞血瘀。治疗上以“活血祛瘀、行气消肿”为主,运用中药... 详细信息

踝关节扭伤是常见的运动损伤,若处理不当,易遗留踝关节疼痛、行走不稳等后遗症,给患者带来诸多痛苦。王明喜教授总结多年临床经验,认为该病的病机为损伤日久,以致血气阻滞不通,气滞血瘀。治疗上以“活血祛瘀、行气消肿”为主,运用中药外洗配合功能锻炼治疗,倡导中西医结合诊治,临床疗效较佳。

关键词：陈旧性踝关节扭伤治疗经验王明喜

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GSM-R核心网改造综合技术研究与应用

科技创新与应用 2024年第11期14卷 11-14页

作者：司桂行滕飞梁俊强赵元武中铁十局集团电务工程有限公司济南250101

目前中国铁路行业无线通信系统主要采用GSM-R移动通信系统,该系统主要为无线接入网和核心网两部分。其中核心网部分主要负责该无线网络系统的核心数据交换和处理,其可靠性和安全性至关重要。该文对探讨核心网改造过程中核心网设备组网... 详细信息

目前中国铁路行业无线通信系统主要采用GSM-R移动通信系统,该系统主要为无线接入网和核心网两部分。其中核心网部分主要负责该无线网络系统的核心数据交换和处理,其可靠性和安全性至关重要。该文对探讨核心网改造过程中核心网设备组网模式、割接业务系统内容、测试及保护模式进行研究,通过研究提高既有线路割接效率,减少施工过程中对既有设备的影响,降低行车安全风险,为今后同类型的施工提供宝贵的经验。

关键词：核心网电路域割接分组域割接无线通信系统 GSM-R移动通信系统

Incorporation of intra-city human mobility into urban growth simulation:A case study in Beijing

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Journal of Geographical Sciences 2022年第5期32卷 892-912页

作者： WANG Siying fei teng LI Weifeng ZHANG Anqi GUO Huagui DU Yunyan School of Resource and Environmental Science Wuhan UniversityWuhan430079China Department of Urban Planning and Design The University of Hong KongHong KongChina Guangdong-Hong Kong-Macao Joint Laboratory for Smart Cities Hong KongChina Institute of Geographic Sciences and Natural Resources Research CASBeijing100101China School of Architecture and Urban-rural Planning Fuzhou UniversityFuzhou350108China

The effective modeling of urban growth is crucial for urban planning and analyzing the causes of land-use *** urbanization has slowed down in most megacities,improved urban growth modeling with minor changes has become a crucial open issue for these *** existing models are based on stationary factors and spatial proximity,which are unlikely to depict spatial connectivity between *** research attempts to leverage the power of real-world human mobility and consider intra-city spatial interaction as an imperative driver in the context of urban growth ***,the gravity model,which considers both the scale and distance effects of geographical locations within cities,is employed to characterize the connection between land areas using individual trajectory data from a macro *** then becomes possible to integrate human mobility factors into a neural-network-based cellular automata(ANN-CA)for urban growth modeling in Beijing from 2013 to *** results indicate that the proposed model outperforms traditional models in terms of the overall accuracy with a 0.60%improvement in Cohen’s Kappa coefficient and a 0.41%improvement in the figure of *** addition,the improvements are even more significant in districts with strong relationships with the central area of *** example,we find that the Kappa coefficients in three districts(Chaoyang,Daxing,and Shunyi)are considerably higher by more than 2.00%,suggesting the possible existence of a positive link between intense human interaction and urban *** paper provides valuable insights into how fine-grained human mobility data can be integrated into urban growth simulation,helping us to better understand the human-land relationship.

关键词： cellular automata urban growth simulation human mobility massive trajectories

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对高速公路供配电系统电能质量的探析

机械工程与自动化 2024年第1期 138-140页

作者：杨腾飞马宝君李政甘肃省交通科学研究院集团有限公司甘肃兰州730030

为契合高速公路、特别是智慧高速公路的快速发展,对高速公路供配电系统的电能质量进行探析是很有必要的。针对谐波、电压偏差、电压三相不平衡、频率偏差等高速公路的典型电能质量问题,从来源、影响及危害对谐波问题进行着重分析,并对... 详细信息

为契合高速公路、特别是智慧高速公路的快速发展,对高速公路供配电系统的电能质量进行探析是很有必要的。针对谐波、电压偏差、电压三相不平衡、频率偏差等高速公路的典型电能质量问题,从来源、影响及危害对谐波问题进行着重分析,并对其他电能质量问题也进行了阐述和分析,之后分析了电能质量问题的监测措施和方案,最后分析了高速公路电能质量问题的治理措施。分析结果对于保证高速公路供配电系统的安全稳定可靠运行具有一定的参考价值。

关键词：高速公路电能质量供配电系统谐波

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不同贮藏温度对南美白对虾品质的影响

粮食与油脂 2024年第2期37卷 85-89页

作者：陈钰庞文媛周三女马腾飞吴先辉庞杰宁德职业技术学院福建福安355000 福建农林大学食品科学学院福建福州350002

以南美白对虾为研究对象,对比分析冷藏(4℃)、微冻(-2℃)和冻藏(-18℃)条件下,虾肉的品质变化。结果表明:随着贮藏时间的延长,不同贮藏温度条件下南美白对虾的保水性、蛋白质含量、肌原纤维蛋白活性、脂肪含量均不断降低,ATP关联化合物(... 详细信息

以南美白对虾为研究对象,对比分析冷藏(4℃)、微冻(-2℃)和冻藏(-18℃)条件下,虾肉的品质变化。结果表明:随着贮藏时间的延长,不同贮藏温度条件下南美白对虾的保水性、蛋白质含量、肌原纤维蛋白活性、脂肪含量均不断降低,ATP关联化合物(K值)、硫代巴比妥酸(TBA)值均呈上升趋势。南美白对虾在4、-2、-18℃条件下贮藏的货架期分别为6、20、50 d。

关键词：南美白对虾贮藏温度货架期

Simulation of gas-solid flow in sinter vertical cooling furnace

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Journal of Iron and Steel Research(International) 2023年第11期30卷 2133-2142页

作者： teng-fei Qi Hai-feng Li Jun-jie Sun Guo-jun Chen Yong-jie Zhang School of Metallurgy Northeastern UniversityShenyang110819LiaoningChina Key Laboratory for Ecological Metallurgy of Multi-Metallic Mineral(Ministry of Education) Northeastern UniversityShenyang110819LiaoningChina Technology Center Shanghai Meishan Iron and Steel Co.Ltd.Nanjing210039JiangsuChina Central Research Institute Baosteel Co.Ltd.Shanghai201900China

The velocity distribution of sinter and gas in vertical cooling furnace(VCF)has an important influence on gas-solid heat *** on the slot model of single hopper in the VCF of Meishan Iron and Steel Co.,Ltd.,the velocity and particle size distribution of sinter and the velocity and pressure distribution of gas were studied using a computational fluid dynamics-discrete element method model to obtain the gas-solid flow rule in the *** results showed that the velocity of sinter near the wall and the edge of vent cowl was lower than that in the rest of the same ***,the rectangular section of the vertical cooling furnace can be divided into a quasi-static zone,a plug flow zone and a convergent flow zone according to the flow velocity of the *** average particle size and the void fraction of sinter bed were distributed in"W"and"V"shape along the width direction,*** distribution of gas velocity in the furnace cavity was uneven,and the high-velocity area gradually changed from the center to the edge of the furnace cavity with the rise of *** the ratio of edge to center gas flow from 2.7∶1 to 0.7∶1 could improve the gas velocity,but could not change the gas velocity *** gas velocity distribution was more affected by the average particle size distribution of the sinter *** was suggested that measures need be taken to adjust it to improve the gas velocity distribution in the VCF.

关键词： Sinter Vertical cooling furnace Average particle size Void fraction Velocity distribution Gas distribution mode