检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

基于改进Snake模型的肺部图像分割

计算机工程与应用 2014年第15期50卷 164-167,186页

作者：石锐黄向娟重庆大学计算机学院重庆400044

肺实质分割是基于CT图像的计算机辅助检测技术必不可少的步骤。针对现有活动轮廓模型对初始位置敏感、深度凹陷区域分割不准确和抗噪性差等缺点,提出了一种基于改进Live-Wire算法确定Snake模型初始轮廓的交互式分割方法。该方法结合并改... 详细信息

肺实质分割是基于CT图像的计算机辅助检测技术必不可少的步骤。针对现有活动轮廓模型对初始位置敏感、深度凹陷区域分割不准确和抗噪性差等缺点,提出了一种基于改进Live-Wire算法确定Snake模型初始轮廓的交互式分割方法。该方法结合并改进Live-wire算法和一般的阈值法对图像进行预分割,将得到的边缘作为Snake模型的初始轮廓,通过Snakes模型演化得到肺实质轮廓结果。实验结果表明该方法能快速地对肺部图像进行分割,与传统方法相比具有人工交互次数减少、抗噪音性好、更具鲁棒性和效率性的优点。

关键词：肺部图像 Live-Wire算法阈值法 Snake模型

在线全文

学校读者我要写书评

暂无评论

循环肿瘤DNA检测及其临床应用研究进展

医学检验与临床 2021年第1期32卷 43-46页

作者：黄象娟山东医学高等专科学校济南校区医学检验系山东济南250002

循环肿瘤DNA(ctDNA)主要来自于坏死、凋亡的肿瘤细胞,循环肿瘤细胞,肿瘤细胞分泌的外排体。ctDNA检测标本易获取、创伤小、方便动态监测,可反应肿瘤细胞基因改变的相关情况。ctDNA检测方法根据目标不同可分为两大类,一类是有针对性的检... 详细信息

循环肿瘤DNA(ctDNA)主要来自于坏死、凋亡的肿瘤细胞,循环肿瘤细胞,肿瘤细胞分泌的外排体。ctDNA检测标本易获取、创伤小、方便动态监测,可反应肿瘤细胞基因改变的相关情况。ctDNA检测方法根据目标不同可分为两大类,一类是有针对性的检测特定的基因和突变,另一类是以非靶向方法检测所有的基因,通过与已知参考序列对照可获得大量信息。现有研究表明ctDNA检测可用于肿瘤的早期诊断和筛查、复发监控和预后判断及疗效、耐药监测与用药指导。本文综述了ctDNA检测及其临床研究进展,并提出了ctDNA检测在临床应用中面临的问题。

关键词： ctDNA 检测肿瘤临床研究

穴位贴敷联合生化汤用于无痛人工流产术患者的效果

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

妇儿健康导刊 2022年第11期1卷 60-62,66页

作者：黄祥娟江苏省江阴市中医外科医院妇产科江苏江阴214437

目的探讨穴位贴敷联合生化汤用于无痛人工流产术患者的效果。方法选择2021年1月至2022年4月江阴市中医外科医院妇产科门诊80例无痛人工流产术患者,采取随机数字表法分为两组,每组各40例。两组术后均予阿莫西林胶囊口服,对照组口服生化汤... 详细信息

目的探讨穴位贴敷联合生化汤用于无痛人工流产术患者的效果。方法选择2021年1月至2022年4月江阴市中医外科医院妇产科门诊80例无痛人工流产术患者,采取随机数字表法分为两组,每组各40例。两组术后均予阿莫西林胶囊口服,对照组口服生化汤100 ml/次,2次/d,连用5 d;观察组在口服生化汤基础上给予穴位(子宫、关元、神阙)贴敷,1次/d,连用2 d。比较术后6、12、24 h视觉模拟评分法(VAS)评分和术后24 h恶心呕吐发生率,记录术后1、2、3 d阴道出血量和阴道出血持续时间。结果观察组术后6、12、24 h VAS评分均低于对照组(P<0.05)。观察组术后24 h恶心呕吐发生率为17.50%,低于对照组的42.50%(P<0.05)。观察组术后1、2、3 d阴道出血量均少于对照组(P<0.05),阴道出血持续时间短于对照组(P<0.05)。结论穴位贴敷联合生化汤可减轻无痛人工流产术患者的术后疼痛和恶心呕吐发生率,减少术后阴道出血量和出血持续时间。

关键词：穴位贴敷生化汤无痛人工流产术效果

小剂量缩宫素联合卡前列素氨丁三醇预防剖宫产高危产妇产后出血的效果评价

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中外医学研究 2021年第1期19卷 12-15页

作者：黄祥娟江阴市中医外科医院江苏江阴214437

目的:探讨小剂量缩宫素联合卡前列素氨丁三醇(欣母沛)预防剖宫产高危产妇产后出血的临床效果。方法:选择2019年1月-2020年5月笔者所在医院收治的60例剖宫产高危产妇,均在椎管内阻滞下行剖宫产术,参照随机数字表均分为观察组和对照组。... 详细信息

目的:探讨小剂量缩宫素联合卡前列素氨丁三醇(欣母沛)预防剖宫产高危产妇产后出血的临床效果。方法:选择2019年1月-2020年5月笔者所在医院收治的60例剖宫产高危产妇,均在椎管内阻滞下行剖宫产术,参照随机数字表均分为观察组和对照组。对照组静脉注射缩宫素20 U,宫体注射欣母沛250 μg,观察组静脉注射缩宫素5 U,宫体注射欣母沛250 μg。比较两组术中及术后24 h出血量、术前及术后24 h Hb水平、术前及术后24 h凝血功能(PT、TT、APTT),观察两组不良反应(恶心呕吐、面部潮红、胸闷、心悸等)。结果:观察组术中、术后24 h出血量均少于对照组,术后24 h Hb水平高于对照组,差异均有统计学意义(P0.05),术后24 h观察组PT、TT、APTT均低于对照组,差异均有统计学意义(P0.05)。结论:小剂量缩宫素联合欣母沛有效减少剖宫产高危产妇产后出血量,改善凝血功能,不影响不良反应。

关键词：小剂量缩宫素卡前列素氨丁三醇剖宫产高危产妇效果评价

生化汤联合耳穴贴压对剖宫产产妇泌乳功能及术后康复的影响

在线全文

学校读者我要写书评

暂无评论

中国中医药现代远程教育 2021年第20期19卷 102-104页

作者：黄祥娟江阴市中医外科医院妇产科江苏江阴214437

目的探讨生化汤联合耳穴贴压对剖宫产产妇泌乳功能和术后康复的影响。方法选择2019年2月—2020年5月来江苏省江阴市中医外科医院妇产科就诊的80例产妇,均在蛛网膜下腔联合硬膜外腔阻滞下行剖宫产术,随机分为研究组和对照组,各40例。对... 详细信息

目的探讨生化汤联合耳穴贴压对剖宫产产妇泌乳功能和术后康复的影响。方法选择2019年2月—2020年5月来江苏省江阴市中医外科医院妇产科就诊的80例产妇,均在蛛网膜下腔联合硬膜外腔阻滞下行剖宫产术,随机分为研究组和对照组,各40例。对照组给予耳穴贴压治疗,研究组实施生化汤联合耳穴贴压治疗,比较2组泌乳功能(泌乳始动时间和术后1 d、2 d、3 d泌乳量评分)和术后康复(肠鸣音恢复时间、首次排气时间和术后1 d、3 d、5 d子宫复旧)。结果研究组泌乳始动时间早于对照组(P0.05),术后3 d、5 d研究组宫底高度均低于对照组(P<0.05)。结论生化汤联合耳穴贴压改善剖宫产产妇的泌乳功能,促进术后康复。

关键词：生化汤耳穴贴压剖宫产泌乳功能术后康复

Quickly obtaining densely dispersed coherent particles in steel matrix and its related mechanical property

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 111-118页

作者： Xiaoxiao Wang Qingsong huang School of Chemical Engineering Sichuan UniversityChengdu 610065China

Densely distributed coherent nanoparticles(DCN)in steel matrix can enhance the work-hardening ability and ductility of steel *** the routes to this end can be generally classified into the liquid-solid route and the solid-solid ***,the formation of DCN structures in steel requires long processes and complex *** far,obtaining steel with coherent particle enhancement in a short time remains a bottleneck,and some necessary steps remain ***,we show a high-efficiency liquid-phase refining process reinforced by a dynamic magnetic ***-Y-Mn-O particles had an average size of around(3.53±1.21)nm and can be obtained in just around 180 *** small nanoparticles were coherent with the matrix,implying no accumulated dislocations between the particles and the steel *** findings have a potential application for improving material machining capacity,creep resistance,and radiation resistance.

关键词： ferritic steels coherent particles microstructure compression test work hardening

Economic effect of China's carbon neutrality target under shared socioeconomic pathways

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2025年第1期68卷 142-157页

作者： Zemiao LIU Xianjin huang Xinxian QI School of Geography and Ocean Science Nanjing University Key Laboratory of Carbon Neutrality and Territory Optimization Ministry of Natural Resources Frontiers Science Center for Critical Earth Material Cycling Nanjing University

Economic feasibility is crucial for achieving the carbon neutrality target. However, current integrated assessments often underestimate the economic impacts of mitigation policies due to the lack of consideration of their economic benefits. This study integrates a warming-labour productivity model with a typical integrated assessment model using shared socioeconomic pathways. It simulates China's economic development and carbon emission levels under both baseline and carbon-neutral policy scenarios, evaluating the economic costs and benefits of emission reduction policies aimed at achieving carbon neutrality. These findings reveal the following:(1) The economic costs of emission reduction policies are projected to peak between 2050 and 2060, ranging from 0.41% to 9.37% of total GDP in the baseline scenario, primarily due to increased energy prices and R&D investments. These costs are expected to decline rapidly after 2070.(2) China's carbon-neutral policies will mitigate global warming, with the economic benefits of mitigation projected to reach 5.65% to 17.24% of China's total GDP by 2100.(3) Lowcarbon scenarios SSP1 and SSP4 could significantly reduce initial economic costs and advance the onset of net economic gains to 2060. This integrated assessment confirms that China's carbon neutrality target offers substantial net economic benefits in the long term. To minimize initial economic costs, efforts should focus on enhancing consumption-side transitions, upgrading lowcarbon technologies, and adopting new energy sources.

关键词： Climate change China Carbon neutrality Economic effects Policy

同方期刊数据库

Tectonic modes of mantle convection and their implications for Earth's tectonic evolution based on three-dimensional numerical simulations

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2025年第1期68卷 270-296页

作者： Song XIANG Jinshui huang Bingcheng WU School of Earth and Space Sciences University of Science and Technology of China CAS Center of Excellence in Comparative Planetary Studies

Five tectonic modes of mantle convection are obtained and analyzed with three-dimensional numerical models in a spherical shell domain. The five tectonic convective modes are non-plate mobile-lid, plate-like mobile-lid, episodic plate-like mobile-lid, episodic stagnant-lid, and stagnant-lid convective modes, respectively. The typical characteristics of these five tectonic modes and their numerical classification criteria based on plateness, mobility, and their standard deviations are presented and discussed. The results show that the yield stress of the lithosphere has profound effects on the tectonic convective *** the gradual increase of yield stress, the tectonic mode of mantle convection changes from one to another sequentially through the aforementioned five modes. Additionally, as the Rayleigh number increases, the range of yield stress for the platelike mobile-lid convective mode decreases, and the dimensionless transition stress between different tectonic modes ***, the dimensional transition stress between the non-plate mobile-lid convective mode and plate-like mobile-lid convective mode increases with the increase of Rayleigh number, but decreases between other tectonic modes. Furthermore, we find that the transition stress between different tectonic modes is inversely proportional to the internal heating rate, with the transition stress decreasing as the internal heating rate increases. The fitting analysis of the transition stress between tectonic modes shows that Earth's current plate tectonics correspond to a lithospheric yield stress of 150–250 MPa, which aligns with the strength of serpentinized mantle rock determined by experimental petrography. If the Archean mantle was 300°C warmer than it is today, then the Earth was in an episodic stagnant-lid convective mode. The tectonic evolution of the Earth's surface is closely related to the lithospheric strength and the process of thermal evolution. If the lithospheric strength w

关键词： Tectonic mode of mantle convection Plate-like mobile-lid convection Episodic plate-like mobile-lid convection Episodic stagnant-lid convection Plate tectonics and tectonic evolution of the Earth

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

茅尾海养殖区重金属污染调查与评价

海洋开发与管理 2016年第2期33卷 36-38页

作者：朱文娟黄祥娟张栋黄妤钦州市海洋局钦州535000 钦州市海洋研究开发中心钦州535000

文章对2012—2014年8月平潮期钦州茅尾海增养殖区水质以及表层沉积物中的铜、铬、镉、汞、砷含量进行了调查和评价。结果表明,茅尾海养殖区水体和沉积物中重金属含量水平能满足规定的海水水产养殖标准值要求,水体中重金属总含量呈递减趋... 详细信息

文章对2012—2014年8月平潮期钦州茅尾海增养殖区水质以及表层沉积物中的铜、铬、镉、汞、砷含量进行了调查和评价。结果表明,茅尾海养殖区水体和沉积物中重金属含量水平能满足规定的海水水产养殖标准值要求,水体中重金属总含量呈递减趋势,而沉积物中则相反,沉积物中重金属总体潜在生态危害程度仍处于低水平,但潜在生态危害的程度略有上升的趋势,潜在生态危害较大的是镉和汞。

关键词：茅尾海养殖区重金属调查评价