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Search Results: 1 - 10 of 281723 matches for " 陈国明 "
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多孔介质X-CT图像的三维重建
Three Dimensional Reconstruction of Porous Media X-CT Image
 [PDF]

邱伟, , 云和, 蔡鹏飞
Advances in Porous Flow (APF) , 2014, DOI: 10.12677/APF.2014.44007
Abstract:
ImageJ这款开放源代码的图像处理软件在多孔介质重建方面介绍很少。通过使用ImageJ软件对一组海绵的X-CT切片进行处理,着重介绍了ImageJ在X-CT图像三维重建中的应用。本文给出了进行三维图像重建主要的操作方法和几种多孔介质重建的图,为更好地使用ImageJ对多孔介质X-CT图像三维重建,给出了进行三维图像重建主要的操作方法和重建结果。对于重建的三维多孔介质模型,利用数值模拟的方法为进一步研究微观流动及传热机理奠定了良好的基础。
ImageJ, an open source code image processing software, is rarely introduced in porous media re-construction. Through the use of ImageJ software, a group of sponge X-CT slices was processed. The application of ImageJ in the X-CT image 3D reconstruction is introduced. In order to better use the ImageJ to three-dimensionally reconstruct the porous media X-ray CT image, this paper gives the main methods of operation and the results of the three-dimensional image reconstruction. For establishing the three-dimensional reconstruction of the porous media model, this paper used the method of the numerical simulation which lays a good foundation for the further research on the micro flow and the heat transfer mechanism.
在大型强子对撞机上的cms实验

物理 , 2009,
Abstract: ?lhc(largehadroncollider)是目前世界上能量最高的强子对撞机.cms(compactmuonsolenoid,中文译名是紧凑型缪子螺线管探测器)是lhc上的主要实验计划之一,其目标就是要寻找higgs粒子或者超出标准模型的其他新粒子,探清自然界的电弱破缺机制,以及寻找暗物质.cms实验位于高能量和高亮度的最前沿,是21世纪初人类认识微观世界最重要的物理实验之一.中国参加了这项国际合作,制作了部分μ子探测器、磁铁支架、电子学和地板等,目前转入物理研究工作,争取在物理研究中作出有显示度的贡献.文章简要介绍了cms探测器以及cms实验的目标和意义.
On the Security Mechanism in HTTP
HTTP的安全机制

张信,
计算机科学 , 2000,
Abstract: This paper analyses the security mechanism in HTTP. It includes basic authentication and its flaws in HTTP/1.0,digest access authentication in HTTP/1.1,proxy authentication,privacy,and cookie’s influence on privacy.For those in e-commerce,S-HTTP is also briefly discussed.
气体扩散CFD建模敏感性分析
章博,
科技导报 , 2011, DOI: 10.3891/j.issn.1000-7857.2011.13.008
Abstract: 提出气体扩散计算流体力学建模敏感性分析的概念,即从众多影响模拟结果的不确定性因素中找出对建模有重要影响的方面,并监测、分析其对模拟结果的影响程度,进而选定最佳建模参数的一种不确定性分析方法。建议敏感性分析顺序应为网格依赖、边界条件、湍流模型及求解控制参数分析。重点对网格依赖和湍流模型敏感性分析的原理和方法进行了论证,并结合某高含硫集气站气体泄漏扩散建模进行了算例研究。研究结果表明,网格依赖分析可在模型预测精度和计算成本间获取平衡点;通过将各湍流模型预测结果与经验公式模型对比,可选取最适合的湍流描述方法。敏感性分析对构建合适的计算模型,提高计算精度,降低计算成本具有重要意义,是气体泄漏扩散建模中不可或缺的重要环节。
脑室-腹腔分流术后并发症分析
,蔡涛
南方医科大学学报 , 2004,
Abstract: 目的探讨脑室-腹腔分流术后并发症的诊治经验。方法回顾性分析125例脑室-腹腔分流术后并发症诊治经过。结果125例患者术后并发症发生率为36.8%(46/125),其中分流管梗阻24例、感染9例、颅内血肿4例、腹部并发症5例,其他4例。结论脑室-腹腔分流术并发症的发生,除与患者身体状况和疾病的性质有关外,主要与医源性因素有关,对并发症以及引起的原因分析与讨论有助其预防。
复合型裂纹扩展过程的温度场分析
林红,
武汉理工大学学报 , 2008,
Abstract: ?针对实际工程结构中广泛存在的ⅰ-ⅱ复合型裂纹,以有限元软件ansys为平台,采用能量释放率准则作为判定依据,模拟了复合型裂纹的扩展路径;将裂纹扩展过程中裂尖前面耗散的塑性功视为内热源,采用热-力耦合方法,分析了扩展过程中的裂尖温度场变化,讨论了预制裂纹角对裂尖起裂塑性区和起裂温度的影响。通过与红外热像仪记录的实验结果进行对比,发现有限元模拟结果与实验结果一致。
http的安全机制
张信 良?
计算机科学 , 2000,
Abstract:
基于卫星遥感技术的输电线路山火风险评估系统
The Risk of Wildfire Evaluation System for Transmission Lines Based on Remote Sensing Technology
 [PDF]

, 徐侃, 阮羚, , 黄俊杰, 李陶
Journal of Electrical Engineering (JEE) , 2015, DOI: 10.12677/JEE.2015.32008
Abstract:
研发了输电线路走廊山火风险实时监测与分析系统,提出结合国内外卫星遥感影像数据分析的山火风险评估模型。将该系统成功的应用于湖北电网输电线路山火风险评估,实现了湖北电网范围内的输电线路不同区域的风险分级,应用结果表明,本系统通过互联网技术和卫星遥感,专家系统,大数据挖掘等多重手段,有效的获取了山火风险高发区段,指导了冬春季节的山火预防工作。
In this paper, a real-time monitoring and analysis system for risk of wildfire in transmission line corridor is presented, which has been combined with wildfire risk assessment model based on domestic and international satellite image data. This system has been successfully applied in wild-fire risk assessment for transmission line power grid of Hubei province, which has also realized the classification of risk for different areas in transmission line. The final results have shown that, combined with multiple methods, such as, internet technology, remote sensing technology, expert system and data mining, areas in transmission line with high wildfire risk can be effectively ob-tained by the proposed system, which could be regarded as a guide for fire prevention in the sea-sons of spring and winter.
航空发动机高温测试技术的发展
炳贻?,
推进技术 , 1996,
Abstract: 基于航空发动机的发展,论述了研究开发高温测试技术的重要意义及其测试技术的发展,包括航空发动机热端部件表面高温测试、燃气温度测试和二次仪表等。最后对发展我国航空发动机高温测试技术提出了若干建议。
胆道支架在治疗胆道恶性梗阻中的应用及进展
Application and Progress of the Stents Used in the Therapy of Malignant Biliary Obstruction
 [PDF]

, 李立, 张升宁, , 高杨, 张春平
Advances in Clinical Medicine (ACM) , 2016, DOI: 10.12677/ACM.2016.61011
Abstract:
对于无法行外科根治手术的胆道恶性梗阻病人,使用胆道支架进行姑息治疗已成为首选。支架植入后能有效缓解患者临床症状,最大限度延长患者生存时间,提高患者生存质量。本文概述了目前胆道支架的分类及选择、植入方式及相关联合治疗等方面的最新研究及进展。
Using biliary stents for palliative care has become the first choice for the patients with malignant biliary obstruction? who cannot undergo surgical resection. After stent implantation, it can effec-tively alleviate the clinical symptoms, maximize prolong survival time and improve the quality of life. This article summarizes the latest research and progress on the stent’s classification and se-lection, insertion methods and relevant combination treatments.
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