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吲哚菁绿视频血管造影在中央沟区肿瘤切除术中的静脉保护作用

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中华神经外科杂志 2025年第01期41卷 51-56页

作者：马超仇尤佳陈周青朱昀王中苏州大学附属第一医院神经外科，苏州　215006

目的探讨吲哚菁绿视频血管造影(ICG-VA) FLOW800技术在中央沟区肿瘤切除术中的静脉保护作用。方法回顾性收集2020年1月至2023年10月在苏州大学附属第一医院神经外科接受手术治疗的中央沟区肿瘤患者的临床资料，共23例；其中脑膜瘤19例... 详细信息

目的探讨吲哚菁绿视频血管造影(ICG-VA) FLOW800技术在中央沟区肿瘤切除术中的静脉保护作用。方法回顾性收集2020年1月至2023年10月在苏州大学附属第一医院神经外科接受手术治疗的中央沟区肿瘤患者的临床资料，共23例；其中脑膜瘤19例，转移瘤2例，胶质母细胞瘤2例。均采用ICG-VA FLOW800技术，在肿瘤切除术前明确肿瘤与中央沟静脉的关系，在肿瘤切除前、后评估中央沟静脉及瘤周引流静脉通畅情况。观察肿瘤切除情况、手术相关并发症，随访临床及影像学预后。采用Karnofsky功能状态(KPS)评分评估临床预后。结果23例患者术中显微镜下显示肿瘤均为完全切除；中央沟静脉及瘤周引流静脉均解剖保留。ICG-VA FLOW800分析证实，肿瘤切除后中央沟静脉回流通畅者21例(91.3%)，回流受阻者1例；1例患者肿瘤切除前因肿瘤压迫导致瘤周血管闭塞、上矢状窦回流受阻，肿瘤切除后，中央沟静脉向上矢状窦回流，瘤周静脉血流通畅。术后术区渗血1例，肌力较术前下降2例，肺部感染1例，癫痫发作2例。术后随访时间[M(Q1，Q3)]为20(6，36)个月。至末次随访，KPS评分90分19例(82.6%), 60～80分4例(17.4%)；1例转移性腺癌患者肿瘤复发需再次行手术。结论ICG-VA FLOW800技术在中央沟区肿瘤切除术中有助于明确肿瘤与中央沟静脉的关系，在完整地切除肿瘤的同时可对静脉系统予以保护。

关键词：脑肿瘤中央沟区荧光素血管造影术吲哚花青绿静脉保护

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数字贸易对新型城镇化优化布局的影响与机制

中国流通经济 2025年第2期39卷 60-72页

作者：郑佳宁聂昀秋马晓君东北财经大学统计学院辽宁大连116025

新型城镇化是影响我国社会经济发展的重要因素,要健全推进新型城镇化体制机制。数字贸易作为新一轮科技和产业革命的重要推动力,可为新型城镇化优化布局创造机遇。基于2014—2022年我国241个地级及以上城市平衡面板数据,采用纵横向拉开... 详细信息

新型城镇化是影响我国社会经济发展的重要因素,要健全推进新型城镇化体制机制。数字贸易作为新一轮科技和产业革命的重要推动力,可为新型城镇化优化布局创造机遇。基于2014—2022年我国241个地级及以上城市平衡面板数据,采用纵横向拉开档次法测度优化布局水平,采用CRITIC-G1-Bonferroni算子测度数字贸易发展水平,进而利用固定效应模型、门槛效应模型、空间杜宾模型检验数字贸易对优化布局的影响与机制。研究发现,数字贸易不仅直接促进新型城镇化优化布局,而且通过数字基础设施建设、产业集聚效应、产业高级化、人力资本流动四个机制对优化布局产生间接影响。异质性分析结果表明,数字贸易对优化布局的影响效应具有区域异质性和时间异质性:从所在地区看,受经济基础等影响,该效应在东部地区城市最显著,在中部和西部地区城市较弱,在东北地区城市最弱;从行政级别看,受中心性影响,相比于其他地级及以上城市,该效应在直辖市、省会城市更明显;从时间阶段看,受宏观政策影响,相比于2014—2017年,该效应在2018—2022年更强。门槛效应检验结果表明,随着数字贸易发展水平的提高,数字贸易对优化布局的边际效应先增后减,在数字贸易发展水平中等的城市最显著,在发展水平高的城市次之,在发展水平低的城市不显著。空间溢出效应检验结果表明,数字贸易对优化布局的影响具有空间溢出效应,即其影响并不局限于单一城市,还通过区域间相互作用影响相邻城市。此外,相比于优化布局的水平职能结构、全域等级层次两个维度,数字贸易对优化布局基础设施网络、多元空间结构两个维度的贡献是优化布局的决定性因素。为进一步发展数字贸易,促进新型城镇化城市优化布局,应着力推动数字基础设施建设、产业集聚、产业高级化和人力资本流动;因地因时制定差异化政策,有效引导城市各区域高质量协同发展。

关键词：数字贸易新型城镇化优化布局非线性效应空间溢出效应

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基于深度学习的在线视频与习题匹配计算研究

小型微型计算机系统 2025年第1期46卷 81-89页

作者：李浩君钟依莲吕韵浙江工业大学教育科学与技术学院杭州310023

在线学习多模态资源匹配的精准性是自适应学习服务效率提升的关键问题,而目前在线学习服务存在着不同模态资源关联特征挖掘浅层化、模态资源表征形式缺乏规范化以及模态资源间智能匹配计算低效化等问题.针对以上问题,本文聚焦在线视频... 详细信息

在线学习多模态资源匹配的精准性是自适应学习服务效率提升的关键问题,而目前在线学习服务存在着不同模态资源关联特征挖掘浅层化、模态资源表征形式缺乏规范化以及模态资源间智能匹配计算低效化等问题.针对以上问题,本文聚焦在线视频与习题资源匹配研究问题,提出了一种基于深度学习的在线视频与习题匹配计算模型DL-VEMC(Online video and exercise matching calculation based on deep learning).首先,通过关键帧提取算法KEA、语音识别技术以及jieba分词技术深度挖掘在线资源多维度特征,实现在线视频与习题预处理;其次,使用CNN、注意力机制以及LSTM等深度学习技术协同开展视频关键帧表征,利用BERT技术对在线视频音频转录文本以及习题文本进行表征,获得在线视频与习题统一化语义表示;最后,融合在线视频与习题的语义信息,利用三层MLP拟合在线视频与习题匹配度值计算函数.实验结果表明,该模型的性能优于现有基线模型,消融实验和实际应用案例也验证了模型的有效性及可行性,为在线视频与习题匹配计算提供了理论依据.

关键词：在线视频在线习题匹配计算深度学习

Corrosion Resistance of AZ91 Mg Alloy Modified by High-Current Pulsed Electron Beam

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Acta Metallurgica Sinica(English Letters) 2019年第2期32卷 218-226页

作者： Peng-Peng Wu Kun-Kun Deng Kai-Bo nie zhong-zhong Zhang Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and EngineeringTaiyuan University of Technology

The high-current pulsed electron beam(HCPEB) treatment with current density 6 J/cm^2 was applied on AZ91 Mg alloy to improve its corrosion resistance. Results showed that the net-like Mg_(17)Al_(12) disappeared on the surface of AZ91 Mg alloy after irradiation by HCPEB, which was instead of supersaturated Al element on the surface. Nevertheless, the application of HCPEB also led to the formation of crater-like and groove-like structures as well as micro-cracks on the surface of AZ91 Mg alloy. After HCPEB treatment by 3, 5 and 10 pulses, the AZ91 Mg alloy exhibited better corrosion ***, the increasing amount of micro-cracks reduced the anti-corrosive properties of AZ91 Mg alloy as the pulse increased to 20 and 30.

关键词： High-current pulsed electron beam(HCPEB) Corrosion resistance Electrochemical impedance spectroscopy(EIS) AZ91 Mg alloy Microstructure

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台州市城市绿色货运发展路径探讨

交通企业管理 2025年第1期40卷 92-94页

作者：周昀中陈刚台州市公路与运输管理中心浙江省交通运输科学研究院

城市绿色货运发展是国家“2030年前碳达峰,2060年前碳中和”战略目标提出后的必然要求。加快推进城市绿色货运发展,既有助于加速城市货运物流节能减排,降低环境污染,又能进一步促进物流资源整合,推动物流业降本增效。一、城市绿色货运... 详细信息

城市绿色货运发展是国家“2030年前碳达峰,2060年前碳中和”战略目标提出后的必然要求。加快推进城市绿色货运发展,既有助于加速城市货运物流节能减排,降低环境污染,又能进一步促进物流资源整合,推动物流业降本增效。一、城市绿色货运的定义与特征1.城市绿色货运的定义城市绿色货运,作为绿色物流的重要环节.

关键词：城市配送绿色货运节能减排公共配送货运配送冷链配送

Relationship Between Producer Services Developing Level and Urban Hierarchy——A Case Study of Zhujiang River Delta

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Chinese Geographical Science 2008年第1期18卷 1-8页

作者： zhong yun YAN Xiaopei Institute of Hong Kong Macao ＆ SEZs Economy Jinan University Guangzhou 510632 China Center for Urban ＆ Regional Studies SUN Yat-Sen University Guangzhou 510275 China

As the Central Place Theory indicates, the centricity of a central city can influence the extension of its ser- vice. Since the service industry in the theory is mostly consumer services, it is worth studying the relationship between the producer services and the centricity of the city in the service society with producer services becoming a more im- portant part of the service industry. The paper takes the case of the Zhujiang (Pearl) River Delta (PRD), a developed region in China, to study the relationship between the developing level of producer services and the urban hierarchy. Based on the analysis about the spatial difference of the producer services in the nine cities of the PRD, and the divi- sion of the nine cities according to some economic indices, it is shown that there is a correlation between the develop- ing level of producer services and the urban hierarchy. Furthermore, two deductions about the future status of the pro- ducer services in the city and the location of the producer services in a large region can be made from this correlation between the developing level of producer services and the urban hierarchy.

关键词： producer services urban hierarchy correlativity Zhujiang (Pearl) River Delta (PRD)

Convergence analysis for complementary-label learning with kernel ridge regression

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Applied Mathematics(A Journal of Chinese Universities) 2024年第3期39卷 533-544页

作者： nie Wei-lin WANG Cheng XIE zhong-hua School of Mathematics and Statistics Huizhou UniversityHuizhou 516007China School of Computer Science and Engineering Huizhou UniversityHuizhou 516007China

Complementary-label learning(CLL)aims at finding a classifier via samples with complementary *** data is considered to contain less information than ordinary-label *** transition matrix between the true label and the complementary label,and some loss functions have been developed to handle this *** this paper,we show that CLL can be transformed into ordinary classification under some mild conditions,which indicates that the complementary labels can supply enough information in most *** an example,an extensive misclassification error analysis was performed for the Kernel Ridge Regression(KRR)method applied to multiple complementary-label learning(MCLL),which demonstrates its superior performance compared to existing approaches.

关键词： multiple complementary-label learning partial label learning error analysis reproducing kernel Hilbert spaces

Heat engines of the Kerr-AdS black hole

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Communications in Theoretical Physics 2023年第12期75卷 129-137页

作者： Yi zhong yun-Zhi Du School of Physics and Electronics Hunan UniversityChangsha 410082China Department of Physics Shanxi Datong UniversityDatong 037009China Institute of Theoretical Physics Shanxi Datong UniversityDatong 037009China

In this paper,we investigate three types of heat engines for the rotating Kerr-Anti de Sitter(Kerr-AdS)black *** first briefly review the thermodynamics and phase structure of the Kerr-AdS black hole and obtain the phase structure in the T-S *** thermal stability of Kerr-AdS black holes,along with their dependence on various parameters,is thoroughly ***,by utilizing the phase diagram,we consider three types of heat engines:the maximal Carnot engine,Stirling engine,and Rankine *** calculate both the work and efficiency for these *** results indicate that angular momentum has a significant influence on these heat engines.

关键词： black hole heat engine Kerr-AdS

Numerical simulation of pollution process due to resuspension of bed materials adsorbing pollutants in alluvial rivers

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Science China(Technological Sciences) 2015年第7期58卷 1280-1288页

作者： DING yun XIAO Yang zhong DeYu State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University College of Water Conservancy and Hydropower Engineering Hohai University State Key Laboratory of Hydroscience and Engineering Tsinghua University

Resuspension of bed materials absorbing pollutants potentially poses unpredictable challenges to water management in alluvial rivers and its mechanism of transport has not been widely *** this study,a transport equation that defines the movement of pollutants adsorbed on the bed materials in the active bed layer is established,on the basis of mass conservation law and continuum *** transport equation is coupled into the 1-D mathematical model to numerically investigate water pollution process due to the scour of the bed sediment adsorbing *** with the situation in which the dynamics of the active bed layer is not considered indicate that the periodical evolution of the bed layer plays an innegligible role in the pollution process due to sediment ***,comparisons of the results with available experimental observations are presented,and fairly good agreement is obtained.

关键词： resuspension pollutants alluvial rivers active bed layer