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3-dimensional slope stability analyses using non-associative stress-strain relationships

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Science China(Technological Sciences) 2009年第9期52卷 2517-2527页

作者： CHEN ZuYu SUN Ping WANG YuJie zhang hongtao Department of Geotechnical Engineering China Institute of Water Resources and Hydropower ResearchBeijing 100048China Department of Civil Engineering Beijing University of Science and TechnologyBeijing 430074China

The research work presented in this paper refers to a new slope stability analysis method used for landslide risk evaluations. It is an extension of the 3-dimensional upper-bound slope stability analysis method proposed by Chen et al. in 2001,which employs the Mohr-Coulomb's associative flow rule. It has been found that in a 3-dimensional area,a prism may not be able to move at friction angles to all its surrounding interfaces,as required by this associative rule,and convergence problems may occasionally arise. The new method establishes two velocity fields:(i) The plastic one that represents a non-associative and the best representative dilation behavior,and (ii) the virtual one that permits the solution for factor of safety in the work and energy balance equation. The new method can then allow any input value of dilation angle and thus solve the convergence problem. A practical application to a concrete dam foundation is illustrated.

关键词： non-associative flow rule slope stability limit analysis 3-dimension

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中国海油溢油处置能力的建设现状及挑战

化工管理 2024年第17期 161-164页

作者：李杨宋燕郭鸿飞张洪涛吴亮尹建国中海石油环保服务(天津)有限公司天津300457

中国海油高度重视海上油气生产安全,为了有效应对海上溢油事故,中国海洋石油集团有限公司建立了一套海上溢油应急体系,随着中国海油勘探开发的规模逐渐增大,海上油气开发生产方式及油气种类日益增多,特殊区域溢油特殊种类原油泄漏处置... 详细信息

中国海油高度重视海上油气生产安全,为了有效应对海上溢油事故,中国海洋石油集团有限公司建立了一套海上溢油应急体系,随着中国海油勘探开发的规模逐渐增大,海上油气开发生产方式及油气种类日益增多,特殊区域溢油特殊种类原油泄漏处置方法与一般溢油事故有所不同。文章结合中国海油海上油气开发前沿和中国海油现有海上溢油处置能力建设现状,探讨特殊环境特殊种类原油溢油事故的特点及处置难点,并与现有溢油处置能力对比,分析两者差距,以期为中国海油海上溢油事故处置能力建设提供参考和支持。

关键词：溢油应急能力建设特殊区域溢油特殊种类原油泄漏溢油事故处置

胜任力导向的任务驱动教学法在急危重症护理实验教学中的应用与效果评价

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黑龙江医学 2024年第11期48卷 1359-1361页

作者：张洪涛吴玲玲万薇薇韦玉妹仇露露李小悦遵义医科大学第五附属(珠海)医院广东珠海519100

目的:探讨胜任力导向的任务驱动教学法在急危重症护理实验教学中的应用效果,为提高护理教学质量提供依据。方法:选取2021年遵义医科大学第五附属(珠海)医院40名实习护士作为研究对象,采用随机数表法将其分为对照组和观察组,每组各20人... 详细信息

目的:探讨胜任力导向的任务驱动教学法在急危重症护理实验教学中的应用效果,为提高护理教学质量提供依据。方法:选取2021年遵义医科大学第五附属(珠海)医院40名实习护士作为研究对象,采用随机数表法将其分为对照组和观察组,每组各20人。对照组采用常规教学法,观察组实施胜任力导向的任务驱动教学法。比较两组实习护士急危重症护理工作掌握程度、护理教学成绩及护理教学质量情况。结果:教学工作结束后,观察组实习护士急危重症护理工作总掌握程度为95.00%,高于对照组的65.00%,差异有统计学意义(χ^(2)=5.625,P<0.05)。带教后,观察组实习护士急危重症护理教学成绩量表各维度评分均高于对照组,差异有统计学意义(t=4.809、7.220、2.455、3.776、6.797、4.757,P<0.05)。教学工作结束后,观察组实习护士急危重症护理教学质量量表各维度评分均高于对照组,差异有统计学意义(t=6.755、6.509、4.506、6.971、6.602、6.406,P<0.05)。结论:在急危重症护理实验教学中应用胜任力导向的任务驱动教学法,能够提高实习护士对急危重症护理工作的掌握程度,在提高护理教学成绩的同时提升教学质量。

关键词：急危重症护理实验教学任务驱动教学法教学质量

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基于图卷积网络的轴承故障诊断

煤矿机械 2024年第3期45卷 152-155页

作者：赵舜赵文燕张洪滔李雅婧卫思聪中北大学机械工程学院太原030051 山西金意科特种设备检验检测有限公司山西运城044000

针对基于图卷积网络(GCN)的故障诊断方法大多默认节点间的权重相同、导致诊断精度较低与鲁棒性较差的问题,提出了一种基于欧式距离和余弦距离的GCN故障诊断方法(EC-GCN)。首先,充分考虑节点间的数值特征和方向特征,利用欧式距离和余弦... 详细信息

针对基于图卷积网络(GCN)的故障诊断方法大多默认节点间的权重相同、导致诊断精度较低与鲁棒性较差的问题,提出了一种基于欧式距离和余弦距离的GCN故障诊断方法(EC-GCN)。首先,充分考虑节点间的数值特征和方向特征,利用欧式距离和余弦距离构建加权样本关联图。其次,利用GCN对样本关联图的故障特征进行提取。最后,将故障特征输入分类器进行分类识别。对公开轴承数据集进行测试,EC-GCN方法能够有效提取轴承故障特征,故障分类精度达到了98.93%。

关键词： GCN 轴承故障诊断加权关联图

改良术中实时计划对125Ⅰ粒子治疗腰淋巴结转移癌的价值

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实用肿瘤杂志 2024年第2期39卷 160-165页

作者：刘泽洲梁岩松赵金鑫于慧敏张宏涛徐克李慧娟底学敏高贞王娟河北省肿瘤放射性粒子植入诊疗中心河北省放射性粒子近距离治疗研究所河北省人民医院肿瘤一科河北石家庄050051

目的探讨改良术中实时计划对CT引导125Ⅰ粒子植入治疗腰淋巴结转移癌的价值。方法选取2015年1月至2021年12月在河北省人民医院接受125Ⅰ粒子治疗的腰淋巴结转移癌患者26例。根据手术时长(0.05)。传统术中实时计划组术前和术后V150比较... 详细信息

目的探讨改良术中实时计划对CT引导125Ⅰ粒子植入治疗腰淋巴结转移癌的价值。方法选取2015年1月至2021年12月在河北省人民医院接受125Ⅰ粒子治疗的腰淋巴结转移癌患者26例。根据手术时长(0.05)。传统术中实时计划组术前和术后V150比较,差异具有统计学意义(P0.05)。两组V150差值百分比比较,差异具有统计学意义(P=0.035);其余各剂量参数差值百分比比较,差异均无统计学意义(均P>0.05)。改良术中实时计划组和传统术中实时计划组术后6个月有效率分别为76.9%(10/13)和46.2%(6/13;P=0.226)。两组均未出现腹膜炎和出血等并发症。结论改良术中实时计划提高粒子剂量分布的准确性,在一定程度上降低高剂量区范围,为125Ⅰ粒子治疗腰淋巴结转移癌的安全性提供保证。

关键词：肿瘤近距离治疗腰淋巴结转移 125Ⅰ粒子剂量疗效

Characteristics of vascular lesions in patients with posterior circulation infarction according to age and region of infarct

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Neural Regeneration Research 2012年第32期7卷 2536-2541页

作者： Daopei zhang Shuling zhang hongtao zhang Yuming Xu Third Department of Neurology Zhengzhou People's Hospital Zhengzhou 450003 Henan Province China Third Department of Neurology First Affiliated Hospital Zhengzhou University Zhengzhou 450052 Henan Province China

Patients with posterior circulation infarction underwent CT angiography and magnetic resonance angiography. Intracranial and extracranial vasculopathy was evaluated according to age group and location of stroke. Patients aged 〉 60 years and 〈 60 years had similar rates of vertebral artery dominance and vertebrobasilar artery developmental or origin anomalies. Vertebrobasilar artery stenosis or occlusion and tortuosity occurred more frequently in patients aged 〉 60 years than 〈 60 years. The rates of vertebrobasilar artery anomalies and tortuosity were high in patients with posterior circulation infarction. Vertebrobasilar artery tortuosity occurred more frequently in patients aged 〉 60 years, whereas vertebrobasilar artery developmental anomalies occurred with similar frequency in patients aged 〈 60 years and 〉 60 years. Patients with infarction of the brainstem or cerebellum were more ~ikely to have vertebral artery stenosis or occlusion, basi^ar artery stenosis or occlusion, vertebral artery dominance or tortuosity, and basilar artery tortuosity, and patients with infarction of the thalamus, medial temporal, or occipital lobes were more likely to have stenosis or occlusion of the vertebral or basilar arteries. Vertebrobasilar artery tortuosity, vertebral artery dominance （hypoplasia）, and congenital variations of the vertebrobasilar system may lead to posterior circulation infarction at different locations in different age groups.

关键词： vertebrobasilar artery vertebral artery acute cerebral infarction artery tortuosity magnetic resonance angiography CT angiography neuroimaging neural regeneration

Self-Driven Photo-Polarized Water Molecule-Triggered Graphene-Based Photodetector

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Research 2024年第2期2023卷 273-283页

作者： Shisheng Lin Chang Liu Xin Chen Yi zhang hongtao Lin Xutao Yu Yujiao Bo Yanghua Lu College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027P.R.China Hangzhou Gelanfeng Technology Co.Ltd Hangzhou 310051P.R.China State Key Laboratory of Modern Optical Instrumentation Zhejang UniversityHangzhou 310027P.R.China Key Laboratory of Wide Bandgap Semiconductor Materials and Devices HCSemitek CorporationYiwu 322009P.R.China Smart Materials for Architecture Research Lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100P.R.China

Flowing water can be used as an energy source for generators,providing a major part of the energy for daily ***,water is rarely used for information or electronic ***,we present the feasibility of a polarized liquid-triggered photodetector in which polarized water is sandwiched between graphene and a *** to the polarization and depolarization processes of water molecules driven by photogenerated carriers,a photo-sensitive current can be repeatedly produced,resulting in a high-performance *** response wavelength of the photodetector can be fine-tuned as a result of the free choice of semiconductors as there is no requirement of lattice match between graphene and the *** zero voltage bias,the responsivity and specific detectivity of Gr/NaCl(0.5 M)W/N-GaN reach values of 130.7 mA/W and 2.3×10^(9)Jones under 350 nm illumination,***,using a polar liquid photodetector can successfully read the photoplethysmography signals to produce accurate oxygen blood saturation and heart *** with the commercial pulse oximetry sensor,the average errors of oxygen saturation and heart rate in the designed photoplethysmography sensor are~1.9%and~2.1%,*** study reveals that water can be used as a high-performance photodetector in informative industries.

关键词： polarization polarized saturation

Robustness of interdependent networks with weak dependency links and reinforced nodes

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Science China(Information Sciences) 2024年第2期67卷 329-330页

作者： Qian LI hongtao YU Weitao HAN Ruiyang HUANG Shaomei LI Jianpeng zhang Institute of Information Technology PLA Strategic Support Force Information Engineering University

Interdependent networks are more vulnerable than single,non-interacting networks under cascading failure [1–3]. Percolation theory provides a quantifiable theoretical framework to quantify and evaluate the robustness of networked systems. Most existing models [1–3] on the robustness of interdependent networks mainly focused on the giant connected component(GCC) to explore the structural robustness from the macro perspective,

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一种阻燃有机硅密封胶的制备方法

中国建筑防水 2024年第2期 26-29,38页

作者：翁佳丽周敬伊张洪涛杜高来王鑫汪海风浙江中天东方氟硅材料股份有限公司浙江衢州324000

以α,ω-二羟基聚二甲基硅氧烷(107胶)为基础聚合物,氢氧化镁/氢氧化铝复配为阻燃剂,通过单因素试验方式确定了阻燃剂的用量为40%,然后通过添加适当的扩链剂重点提高密封胶的延展性,制得具有较高性价比的阻燃有机硅密封胶。该密封胶的... 详细信息

以α,ω-二羟基聚二甲基硅氧烷(107胶)为基础聚合物,氢氧化镁/氢氧化铝复配为阻燃剂,通过单因素试验方式确定了阻燃剂的用量为40%,然后通过添加适当的扩链剂重点提高密封胶的延展性,制得具有较高性价比的阻燃有机硅密封胶。该密封胶的断裂伸长率为404%,工型试件的拉伸应变达到110%,100%定伸测试后试件无破坏且弹性恢复率高达92%,阻燃等级为FV-0级。

关键词：阻燃有机硅密封胶复配阻燃剂氢氧化镁氢氧化铝扩链剂拉伸性能 FV-0