检索结果-南通市图书馆

Science China(Technological Sciences) 2021年第9期64卷 1971-1980页

作者： JIAO Yu-Yong WU ZeYang ZHENG fei ZHAO Qiang WANG Long HUANG Gang-Hai tan fei Faculty of Engineering China University of GeosciencesWuhan 430074China Shanghai Construction No.4(Group)Co. Ltd.Shanghai 201103China Economic and Technology Research Institute State Grid Shandong Electric Power CompanyJinan 250013China School of Civil Engineering Central South UniversityChangsha 410083China

The computational efficiency of the traditional serial spherical discontinuous deformation analysis(SDDA) program has limited its application in geotechnical engineering problems that need a large number of spheres. The cloud computing technology is used to parallel the SDDA program for the first time in this research. The most computationally intensive portions of the SDDA program, i.e., contact detection and matrix solution, are parallelized with proposed algorithms. The accuracy of the cloud-based parallel SDDA program(CB-PSDDA) is verified first. Further efficiency tests show that significant speedup can be obtained with an 8-server configuration and the computing scale can be up to several tens of thousands of particles. The cloud-based parallelized SDDA program increases its potential in applications of deformation and failure analysis of large-scale and realistic geotechnical engineering problems.

关键词： spherical discontinuous deformation analysis(SDDA) distributed computing cloud computing

基于16SrRNA基因测序对腹膜透析患者肠道微生态环境特征分析研究

在线全文

学校读者我要写书评

暂无评论

当代医学 2024年第10期30卷 129-132页

作者：廖海君谭菲彭红霞赣州市人民医院肾内科江西赣州341000

目的探讨基于16SrRNA基因测序对腹膜透析患者肠道微生态环境的特征分析。方法选取2019年2—9月赣州市人民医院收治的60例接受规律性腹膜透析的患者作为观察组,另选取2019年5月于本院进行常规体检的60名受试者作为对照组。对所有受试者... 详细信息

目的探讨基于16SrRNA基因测序对腹膜透析患者肠道微生态环境的特征分析。方法选取2019年2—9月赣州市人民医院收治的60例接受规律性腹膜透析的患者作为观察组,另选取2019年5月于本院进行常规体检的60名受试者作为对照组。对所有受试者进行粪便提取和检测。比较两组炎症指标水平[C反应蛋白CRP)、超敏C反应蛋白(hs-CRP)、白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)],分析观察组16SrRNA基因测序结果和肠道微生态检测结果。结果观察组CRP、hs-CRP、IL-6水平均高于对照组,TNF-α水平低于对照组,差异有统计学意义(P<0.05)。60例患者中,腹膜透析透出液培养检出革兰阳性菌41例,阳性率为68.3%;观察组革兰阴性菌22例(其中大肠埃希菌14例),革兰阳性菌38例(其中表皮葡萄球菌13例,头状葡萄球菌、唾液链球菌均5例)。结论16SrRNA基因测序可准确评估腹膜透析患者的肠道情况,健康人群肠道微生物的群落较复杂,但基本稳定,为肠道菌群结构和功能研究提供了参考依据。

关键词： 16SrRNA基因测序腹膜透析肠道微生态环境特征分析

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

小净距隧道穿越岩堆体综合加固方案效果分析

公路 2024年第3期69卷 393-399页

作者：厉工厂倪超超谭飞汤瑞张少国张羽安徽建工建设投资集团有限公司合肥市230031 中国地质大学(武汉)工程学院武汉市430074

山区隧道穿越岩堆体时,开挖扰动易导致上覆岩堆体产生局部或整体性的失稳破坏,引起工程地质灾害。以某穿越岩堆体的小净距隧道为工程背景,采用FLAC 3D软件进行数值仿真计算,对无加固措施、仅在上覆岩堆体注浆加固和岩堆体注浆结合锚索... 详细信息

山区隧道穿越岩堆体时,开挖扰动易导致上覆岩堆体产生局部或整体性的失稳破坏,引起工程地质灾害。以某穿越岩堆体的小净距隧道为工程背景,采用FLAC 3D软件进行数值仿真计算,对无加固措施、仅在上覆岩堆体注浆加固和岩堆体注浆结合锚索支护双重加固等3种工况进行模拟计算,对比分析了岩堆体表面变形、隧道内拱顶沉降以及隧道上覆围岩沉降变形趋势,评估不同加固方案的实施效果。结果表明:地层注浆对控制隧道内的拱顶沉降具有较好的效果;锚索支护结合地层注浆综合加固方案可有效抑制岩堆体在隧道开挖扰动下的变形,有助于提升岩堆体的稳定性。综合加固方案可以较好地解决小净距隧道穿越岩堆体诱发的工程问题,可为类似工程提供一定的参考。

关键词：小净距隧道岩堆体数值模拟注浆加固锚索加固围岩稳定性

人工智能赋能体育教育高质量发展的价值意蕴、实践应用、现实困境与实践路径

在线全文

学校读者我要写书评

暂无评论

体育科技文献通报 2024年第9期32卷 155-159页

作者：许小雨谢晓清谭飞湖南师范大学湖南长沙410081 湖南第一师范学院湖南长沙410205

人工智能赋能体育教育高质量发展是当前体育教育改革的重点、热点、难点,也是未来体育教育发展的必然趋势。本文采用文献资料法、逻辑分析法等研究方法,探讨人工智能赋能体育教育高质量发展的价值意蕴、实践应用、现实困境与实践路径。... 详细信息

人工智能赋能体育教育高质量发展是当前体育教育改革的重点、热点、难点,也是未来体育教育发展的必然趋势。本文采用文献资料法、逻辑分析法等研究方法,探讨人工智能赋能体育教育高质量发展的价值意蕴、实践应用、现实困境与实践路径。价值意蕴:人工智能为体育教育智能化转型提供“新动能”;人工智能为体育教育创新型人才培养提供“新模式”;人工智能为体育教育可持续发展营造“新生态”。实践应用:人工智能驱动体育教师教学精准化、高效化;人工智能驱动体育管理科学化、透明化;人工智能驱动体育管理科学化、透明化;人工智能赋能体育服务的数智化、精细化。现实困境:人才困境、认知困境、管理困境、技术困境。实践路径:加强顶层设计,助推“智能+体育教育”可持续发展;提供智能技术多样化培训,提高体育教师智能化素质;完善体育智能化体系,优化体育教育资源建设;加强学校数据安全,规避学校体育现代化数字风险。

关键词：人工智能体育教育高质量发展

维普期刊数据库博看期刊

Genetic Mechanism of Water-Rich Landslide Considering Antecedent Rainfalls:A Case Study of Pingyikou Landslide in Three Gorges Reservoir Area

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2023年第6期34卷 1878-1891页

作者： Defu Tong Aijun Su fei tan Jiandong tang Xiongwei Yi Faculty of Engineering China University of GeosciencesWuhan 430074China Badong National Observation and Research Station of Geohazards China University of GeosciencesWuhan 430074China China Construction Southwest Survey Design and Research Institute Co.Ltd.Chengdu 610052China

Water-rich slope,which could easily fail after prolonged or heavy rain,is very sensitive to *** Landslide is a typical water-rich slope located in the Three Gorges Reservoir area of *** was unstable because of the continuous rainfall that occurred from September to October *** understand the deformation process and genetic mechanism of the landslide,the geomorphological features,geological characteristics,hydrological conditions,and rainfall characteristics were systematically studied by a detailed field investigation of the slope and monitoring of rainfall,water level,and *** addition,the influence of different initial conditions on the stability of the slope was also studied through numerical simulation using measured rainfall data on the basis of which,the effect of antecedent rainfall on slope stability was studied by unsaturated seepage analysis *** results show that the deformation of slope is strongly correlated with the rainfall and groundwater level,and this landslide is a typical rainfall-induced *** the analysis of genetic mechanism of the same type of landslide,a maximum initial pore water pressure of -25 kPa as the initial condition is *** the antecedent rainfall has a greater effect on the stability of the slope,more than 10 days of antecedent rainfall should be considered when designing and controling the slope.

关键词： slope stability landslides unsaturated seepage antecedent rainfall disasters

Lentiviral-mediated vascular endothelial growth factor 165 gene transfer into neural stem cells promotes proliferation

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2011年第19期6卷 1457-1461页

作者： Shanshan Zhang Xiangrong Zheng fei Yin Jielu tan Yujia Yang Department of Pediatrics Xiangya Hospital Central South University Changsha 410008 Hunan Province China

We constructed a lentiviral vector carrying vascular endothelial growth factor 165, which was used to transfect neural stem cells. The transfection rate was approximately 50%, as determined by flow cytometry. Vascular... 详细信息

关键词： vascular endothelial growth factor 165 gene therapy lentivirus neural stem cells transfection

Synthesis, Crystal Structure and Characterization of a One-dimensional Supramolecular Rare Earth Complex of N-(6-(4-Methylpyridinyl))ketoacetamide

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2007年第8期26卷 877-882页

作者： XU Li tanG Kuan-Zhen MA Yu-fei tanG Yu tan Min-Yu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China

A one-dimensional （1D） supramolecular rare earth complex [Nd（NO3）2L2-（C3H6O）][NdL（NO3）4]} （L=N-（6-（4-methylpyridinyl））ketoacetamide） has been prepared and characterized by elemental analysis, IR and electronic spectroscopy, and single-crystal X-ray diffraction. The crystal crystallizes in the triclinic system, space group P1^- with a=0.9146（6）, b=1.2581（8）, c=2.2316（14） nm, α=99.352（10）,β=97.209（9）, γ=103.935（9）°, V=2.422（3） nm3, Dc=1.776 g/cm^3, C33H42N12Nd2O25, Mr=1295.27, Z=2, F（000）=1288, μ=2.217 mm-1, R=0.0508and wR=0.1046 for 5173 observed reflections （I 〉 2σ（I））. In the structure of the title complex,one-dimensional supramolecular double-chains are formed by intermolecular hydrogen bonding interactions.

关键词： crystal structure rare earth nitrate β-diketone complex supramolecular network

Rock mass quality classification based on deep learning:A feasibility study for stacked autoencoders

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2023年第7期15卷 1749-1758页

作者： Danjie Sheng Jin Yu fei tan Defu Tong Tianjun Yan Jiahe Lv Faculty of Engineering China University of GeosciencesWuhan430074China CCCC Second Harbor Engineering Compasny Ltd. Wuhan430040China

Objective and accurate evaluation of rock mass quality classification is the prerequisite for reliable sta-bility *** develop a tool that can deliver quick and accurate evaluation of rock mass quality,a deep learning approach is developed,which uses stacked autoencoders(SAEs)with several autoencoders and a softmax net *** rock parameters of rock mass rating(RMR)system are calibrated in this *** model is trained using 75%of the total database for training sample *** SAEs trained model achieves a nearly 100%prediction *** comparison,other different models are also trained with the same dataset,using artificial neural network(ANN)and radial basis function(RBF).The results show that the SAEs classify all test samples correctly while the rating accuracies of ANN and RBF are 97.5%and 98.7%,repectively,which are calculated from the confusion ***,this model is further employed to predict the slope risk level of an abandoned *** proposed approach using SAEs,or deep learning in general,is more objective and more accurate and requires less human *** findings presented here shall shed light for engineers/researchers interested in analyzing rock mass classification criteria or performing field investigation.

关键词： Rock mass quality classification Deep learning Stacked autoencoder(SAE) Back propagation algorithm

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

一种基于空域占比自适应暗通道去雾算法

四川轻化工大学学报（自然科学版） 2024年第1期37卷 43-50页

作者：尹宋麟谭飞周晴鲜阳赵亮四川轻化工大学自动化与信息工程学院四川宜宾644000 人工智能四川省重点实验室四川宜宾644000

针对暗通道去雾算法存在的天空区域颜色失真的问题,提出了一种基于空域占比自适应暗通道去雾算法。该算法首先引入阈值迭代法,对有雾图像天空区域进行自适应分割;接着计算有雾图像空域占比,当占比大于设定阈值0.05时,对天空区域前1%个... 详细信息

针对暗通道去雾算法存在的天空区域颜色失真的问题,提出了一种基于空域占比自适应暗通道去雾算法。该算法首先引入阈值迭代法,对有雾图像天空区域进行自适应分割;接着计算有雾图像空域占比,当占比大于设定阈值0.05时,对天空区域前1%个最高亮度像素求均值作为大气光值,否则加权平均求取全局大气光值;对于非天空区域依然按照暗通道先验计算透射率,而在天空区域引入修正因子,自适应修正天空区域透射率,同时采用引导滤波对其进行细化;最后通过大气散射模型恢复无雾图像。实验结果表明,所提算法改善了天空区域颜色失真现象,有效去除了图像雾气,恢复了图像的细节信息,且时间复杂度有所降低,具有一定优势。

关键词：空域占比自适应算法暗通道图像去雾引导滤波

维普期刊数据库博看期刊

新工科背景下岩土工程勘察课程思政元素挖掘与融入路径探讨

在线全文

学校读者我要写书评

暂无评论

高等建筑教育 2024年第4期33卷 185-193页

作者：左昌群焦玉勇谭飞李雪平中国地质大学(武汉)工程学院湖北武汉430074

“新工科”和“课程思政”教育理念的提出及融合给高校人才培养提出了全新挑战和改革动力,如何在“新工科”背景下推行课程思政教学改革,培养具有优秀思想政治素养的“新工科”人才是高校面临的重要任务。以中国地质大学(武汉)岩土工程... 详细信息

“新工科”和“课程思政”教育理念的提出及融合给高校人才培养提出了全新挑战和改革动力,如何在“新工科”背景下推行课程思政教学改革,培养具有优秀思想政治素养的“新工科”人才是高校面临的重要任务。以中国地质大学(武汉)岩土工程勘察课程为着力点,结合学科专业特点和学生认知需求,设计课程思政目标,挖掘了四个维度的思政元素,构建了课程思政全阶段闭环融合路径,完善了课程教学目标需求,丰富了课程教学内容及资源素材,创新了教学方法和手段,拓展了岩土工程勘察课程的深度、广度和温度,实现了专业学习和价值引领相结合的育人目标,形成了工程类专业课课程思政教学模式新探索。

关键词：新工科课程思政岩土工程勘察思政元素融入路径