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一类具有VCT意识的随机HIV/AIDS模型的动力学分析

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数学的实践与认识 2024年第3期54卷 135-150页

作者：刘宗萱张太雷蒋为平长安大学理学院陕西西安710064

建立了一类具有自愿咨询和检测(VCT)意识的随机HIV/AIDS传染病模型,利用停时理论等方法证明了随机模型正解的全局存在唯一性.其次,分析了该随机模型的解在相应确定性模型的无病平衡点与地方病平衡点附近的渐近行为,并得到了随机模型解... 详细信息

建立了一类具有自愿咨询和检测(VCT)意识的随机HIV/AIDS传染病模型,利用停时理论等方法证明了随机模型正解的全局存在唯一性.其次,分析了该随机模型的解在相应确定性模型的无病平衡点与地方病平衡点附近的渐近行为,并得到了随机模型解的平均持续与灭绝性的充分条件.最后,通过数值模拟进一步显示了模型的动力学行为.

关键词：随机模型伊藤公式渐近行为持久性灭绝性

论翻转课堂与慕课在思想政治教育教学创新中的应用

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佳木斯职业学院学报 2017年第12期33卷 189-189页

作者：雷雨泰南阳医学高等专科学校河南南阳473000

目前,翻转课堂与慕课已成为一种新兴的教育教学手段,在现代思想政治教育教学中发挥着至关重要的作用。本文首先对翻转课堂与慕课的概念进行了论述,进而介绍了两者在思想政治教育教学中的实际应用。

关键词：翻转课堂慕课思想政治

Bone metastasis is a late-onset and unfavorable event in survivors of gastric cancer after radical gastrectomy:Results from a clinical observational cohort

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Cancer Pathogenesis and Therapy 2024年第1期2卷 50-57页

作者： Cheng Zhang Xiaopeng Zhang Chong Feng Yahui Yang Minmin Xie Ying Feng Zhijun Wu Hui Xu Changhao Wu tai Ma Department of Oncology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui 230022China Anhui Provincial Cancer Institute/Anhui Provincial Office for Cancer Prevention and Control HefeiAnhui 230022China Department of Noncommunicable Diseases and Health Education Hefei Center for Disease Control and PreventionHefeiAnhui 230091China Department of Oncology The Second Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu 221006China Department of Oncology Ma’anshan Municipal People’s HospitalMa’anshanAnhui 243099China Department of Biochemistry and Physiology Faculty of Health and Medical SciencesUniversity of SurreyGuildford GU27HXUnited Kingdom

Background The timing and incidence of recurrent bone metastasis(BM)after radical gastrectomy in patients with gastric cancer(GC)as well as the survival of these patients were not fully *** aim of this study was to analyze the data of an observational GC cohort and identify patients who underwent curative gastrectomy and had recurrent BM to describe and clarify the pattern and profile of BM evolution after *** Data were retrieved from a hospital-based GC cohort,and patients who underwent upfront radical gastrectomy were *** time points of specific organ metastatic events were recorded,and the person-year incidence rate of metastatic events was *** latency period of BM events after gastrectomy was measured and compared with that of the other two most common metastatic events,liver metastasis(LM)and distant lymph node metastasis(LNM),using analysis of *** score matching and subgroup analysis were used for sensitivity *** A total of 1324 GC cases underwent radical gastrectomy between January 2011 and December *** these,67 BM,218 LM,and 248 LNM occurred before the last *** incidence of BM events was 1.7/100 person-years,which was approximately 3-fold lower than that of LM and distant LNM events(5.5 and 6.3 per 100 person-years,respectively).BM events had a significantly longer latency(median time,16.5 months)than LM and LNM events(11.1 and 12.0 months,respectively).Recurrent BM led to a worse prognosis(median survival,4.5 months)than those of LM and LNM events(median survival,7.7 and 7.1 months,respectively).However,no difference in overall survival after gastrectomy was observed among the *** Compared with other common metastatic events,BM in GC after gastrectomy is a late-onset event indicating poor survival.

关键词： Stomach neoplasms Neoplasm metastasis Incidence Survival analysis Propensity score

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耗散腔中压缩真空态下Casimir效应

东北师大学报（自然科学版） 2024年第2期56卷 91-93页

作者：王雪迎龙玉梅刘辉郑泰玉抚顺职业技术学院初等教育系辽宁抚顺113122 东北师范大学物理学院吉林长春130024 吉林建筑大学无机化学分析研究中心吉林长春130118

运用Fox-Li准模理论,研究了压缩真空态下耗散腔中的Casimir效应,并利用黎曼Zeta函数正规化方法,克服了计算中的发散问题.研究结果表明:耗散腔中的Casimir力不仅与腔的尺寸有关,还与耗散腔的衰减率和压缩系数有关,Casimir力随着腔尺寸和... 详细信息

运用Fox-Li准模理论,研究了压缩真空态下耗散腔中的Casimir效应,并利用黎曼Zeta函数正规化方法,克服了计算中的发散问题.研究结果表明:耗散腔中的Casimir力不仅与腔的尺寸有关,还与耗散腔的衰减率和压缩系数有关,Casimir力随着腔尺寸和衰减率的增大而减小,随着压缩系数的增加而增大.

关键词： Casimir效应耗散压缩真空态

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How to apply ex-vivo split liver transplantation safely and feasibly: A three-step approach

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1691-1699页

作者： Dong Zhao Qiu-Hua Xie tai-Shi Fang Kang-Jun Zhang Jian-Xin Tang Xu Yan Xin Jin Lin-Jie Xie Wen-Gui Xie Department of Liver Surgery and Organ Transplantation Center Shenzhen Third People’s HospitalThe Second Affiliated HospitalSchool of MedicineSouthern University of Science and TechnologyShenzhen 518112Guangdong ProvinceChina Department of Organ Procurement Organizations Shenzhen Third People’s HospitalThe Second Affiliated HospitalSchool of MedicineSouthern University of Science and TechnologyShenzhen 518112Guangdong ProvinceChina

BACKGROUND Given the current organ shortage crisis,split liver transplantation(SLT)has emerged as a promising alternative for select end-stage liver disease *** To introduce an ex-vivo liver graft splitting approach and evaluate its safety and feasibility in *** A retrospective analysis was conducted on the liver transplantation data from cases performed at our center between April 1,2022,and May 31,*** study included 25 SLT cases and 81 whole liver transplantation(WLT)*** ex-vivo liver splitting was employed for SLT graft procurement in three *** outcomes were determined,including liver function parameters,postoperative complications,and perioperative *** comparisons for categorical variables were performed using theχ²-*** In the study,postoperative complications in the 25 SLT cases included hepatic artery thrombosis(n=1)and pulmonary infections(n=3),with no perioperative *** contrast,among the 81 patients who underwent WLT,complications included perioperative mortality(n=1),postoperative pulmonary infections(n=8),abdominal infection(n=1),hepatic artery thromboses(n=3),portal vein thrombosis(n=1),and intra-abdominal bleeding(n=5).Comparative analysis demonstrated significant differences in alanine aminotransferase(176.0 vs 73.5,P=0.000)and aspartate aminotransferase(AST)(42.0 vs 29.0,P=0.004)at 1 wk postoperatively,and in total bilirubin(11.8 vs 20.8,P=0.003)and AST(41.5 vs 26.0,P=0.014)at 2 wk ***,the overall incidence of complications was comparable between the two groups(P>0.05).CONCLUSION Our findings suggest that the total ex-vivo liver graft splitting technique is a safe and feasible approach,especially under the expertise of an experienced transplant *** approach developed by our center can serve as a valuable reference for other transplantation centers.

关键词： Split liver transplantation Transplantation Liver splitting Ex-vivo In-situ

Quantifying the Role of the Eddy Transfer Coefficient in Simulating the Response of the Southern Ocean Meridional Overturning Circulation to Enhanced Westerlies in a Coarse-resolution Model

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Advances in Atmospheric Sciences 2024年第9期41卷 1853-1867页

作者： Yiwen LI Hailong LIU Pengfei LIN Eric PCHASSIGNET Zipeng yu Fanghua WU School of Ocean Sciences China University of GeosciencesBeijing 100083China Laoshan Laboratory Qingdao 266237China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China Center for Ocean-Atmospheric Prediction Studies Florida State UniversityTallahassee 32306FloridaUSA China Meteorological Administration Beijing 100081China

This study assesses the capability of a coarse-resolution ocean model to replicate the response of the Southern Ocean Meridional Overturning Circulation(MOC) to intensified westerlies,focusing on the role of the eddy transfer coefficient(κ).κ is a parameter commonly used to represent the velocities induced by unresolved *** findings reveal that a stratification-dependent κ,incorporating spatiotemporal variability,leads to the most robust eddy-induced MOC response,capturing 82% of the reference eddy-resolving *** the eddy-induced velocity into its vertical variation(VV) and spatial structure(SS) components unveils that the enhanced eddy compensation response primarily stems from an augmented SS term,while the introduced VV term weakens the ***,the temporal variability of the stratification-dependent κ emerges as a key factor in enhancing the eddy compensation response to intensified *** experiment with stratification-dependent κ exhibits a more potent eddy compensation response compared to the constant κ,attributed to the structure of κ and the vertical variation of the density *** results underscore the critical role of accurately representing κ in capturing the response of the Southern Ocean MOC and emphasize the significance of the isopycnal slope in modulating the eddy compensation mechanism.

关键词： eddy transfer coefficient mesoscale eddy parameterization enhanced westerlies Southern Ocean Meridional Overturning Circulation ocean model

间苯三酚注射液有关物质的二维液相色谱-质谱联用鉴定

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药学学报 2024年第1期59卷 202-213页

作者：刘佳明陆宇婷宋敏杭太俊中国药科大学药物分析系江苏南京210009

采用二维液相色谱-质谱联用技术鉴定间苯三酚注射液中的有关物质。以HSS T3(250 mm×4.6 mm5μm)为色谱柱,1.36 g·L^(-1)磷酸二氢钾(稀磷酸调节pH调至3.0)-乙腈为一维流动相进行梯度洗脱,实现间苯三酚注射液有关物质的分离。各分离成... 详细信息

采用二维液相色谱-质谱联用技术鉴定间苯三酚注射液中的有关物质。以HSS T3(250 mm×4.6 mm5μm)为色谱柱,1.36 g·L^(-1)磷酸二氢钾(稀磷酸调节pH调至3.0)-乙腈为一维流动相进行梯度洗脱,实现间苯三酚注射液有关物质的分离。各分离成分经多通道切换阀分别被捕集于截留管中,然后输送到BDS C18(100 mm×4.6 mm2.4μm)色谱柱,以0.1%甲酸水溶液-甲醇为二维流动相,进行梯度洗脱实现快速脱盐。电喷雾负离子化-四极杆-飞行时间串联高分辨质谱检测各有关物质母离子及其子离子的准确质量和元素组成,通过质谱解析、有机反应机制分析,甚至对照品对照鉴定它们的结构。在所建立的分析条件下,间苯三酚及其有关物质分离良好,首次检测并鉴定出间苯三酚注射液及其强制降解实验样品中17个主要有关物质,鉴定结果可为间苯三酚注射液质量控制提供参考依据。

关键词：间苯三酚注射液有关物质结构鉴定二维液相色谱-质谱联用

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基于视觉信息补偿的光照不均图像增强方法

吉林大学学报（工学版） 2024年第8期54卷 2301-2306页

作者：王欣党电太湖南工业大学电气与信息工程学院湖南株洲412000

针对因光照不均导致图像灰度值分布不均、噪声大、视觉传达效果差等问题,提出基于视觉信息补偿的光照不均图像增强方法。计算图像中不同目标和背景区域的像素灰度值,构建灰度衰减序列,构建衰减函数对最弱像素点周围的每一个背景点进行... 详细信息

针对因光照不均导致图像灰度值分布不均、噪声大、视觉传达效果差等问题,提出基于视觉信息补偿的光照不均图像增强方法。计算图像中不同目标和背景区域的像素灰度值,构建灰度衰减序列,构建衰减函数对最弱像素点周围的每一个背景点进行加权处理,采用同态滤波函数根据图像中光线的分量值变化去噪。采用视觉信息补偿法计算图中每个区域的像素值,并转换为分量值模式,按照亮度总量值和局部值进行互补增强。实验数据表明:本文方法增强效果佳,图像清晰度得到了提高,细节刻画效果好。

关键词：视觉信息补偿光照不均图像增强灰度衰减函数亮度总量值

现代医院大型医疗设备维修存在问题与对策探讨

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中国医疗器械信息 2024年第6期30卷 148-150页

作者：蔡钰太广州中医药大学第一附属医院设备管理部广东广州510405

目的:分析现代医院大型医疗设备维修存在的问题与对策。方法:医院从2022年对医院大型医疗设备进行强化质量管理,分析大型医疗设备维修存在问题,并提出相应对策,比较2021年与2022年全年医院大型医疗设备故障发生情况、医护人员满意度与... 详细信息

目的:分析现代医院大型医疗设备维修存在的问题与对策。方法:医院从2022年对医院大型医疗设备进行强化质量管理,分析大型医疗设备维修存在问题,并提出相应对策,比较2021年与2022年全年医院大型医疗设备故障发生情况、医护人员满意度与患者满意度的差异。结果:①2022年全年医院大型医疗设备故障发生率低于2021年,差异有意义(P<0.05);②2022年医护人员对大型医疗设备使用的满意度高于2021年,差异有意义(P<0.05);③2022年患者对大型医疗设备使用的满意度高于2021年,差异有意义(P<0.05)。结论:通过强化质量管理的实施,针对大型医疗设备维修中存在的问题,提出有效的解决策略,有助于降低医疗设备故障发生率,提高医护人员与患者对医疗设备使用的满意度。

关键词：公立医院医疗设备设备维修强化质量管理满意度