检索结果-南通市图书馆

Analytical modelling of the mechanical damage of soil induced by lightning strikes capturing electro-thermal,thermo-osmotic,and electro-osmotic effects

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2022年第7期19卷 2027-2043页

作者： RAO Ping-ping ouyang pei-hao NIMBALKAR Sanjay CHEN Qing-sheng WU Zhi-lin CUI Ji-fei Department of Civil Engineering University of Shanghai for Science and TechnologyShanghai200093China School of Civil and Environmental Engineering University of Technology Sydney15 BroadwayUltimoNSW2007Australia Technology Research Center of Ecological Road Engineering Hubei University of TechnologyWuhan430068China

This article presents a mathematical model for simulating the mechanical behaviour of lightning strikes and analysing the resulting damage to the *** article focuses on the electro-thermal effect and seepage caused by lightning strikes in ***,a numerical model based on the conservation laws of momentum,mass and energy is developed for soil subjected to lightning *** to field observations and theoretical calculations are used to demonstrate the efficacy and accuracy of numerical *** findings demonstrate that lightning strikes can cause soils to experience both seepage force and heat *** the calculative condition of this article:by increasing the intrinsic permeability of the soil,k_(p)(≥10^(-10)m^(2)),the seepage force can be effectively reduced,hence reducing the risk of lightning strikes;improving the electrical conductivity of the soil β(≥10^(-1) S/m^(2))and lowering its thermal expansion coefficient(≤10^(-6)K^(-1))can greatly reduce the damage caused by lightning strikes to the *** preceding investigations demonstrate that the suggested model is capable of evaluating mechanical damage caused by lightning in the soil,and the findings contribute to a better understanding of soil mechanical response to lightning strikes.

关键词： Lightning strikes Analytical modelling Soil damage Electro-thermo-osmotic effect Conservation laws

Crosstalk between glioblastoma and tumor microenvironment drives proneural–mesenchymal transition through ligand-receptor interactions

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第2期11卷 874-889页

作者： Yancheng Lai Xiaole Lu Yankai Liao pei ouyang Hai Wang Xian Zhang Guanglong Huang Songtao Qi Yaomin Li Department of Neurosurgery Institute of Brain DiseaseNanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China Laboratory for Precision Neurosurgery Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China

Glioblastoma(GBM)is the most common intrinsic and aggressive primary brain tumor in adults,with a median survival of approximately 15 *** heterogeneity is considered responsible for the treatment resistance and unfavorable ***-mesenchymal transition(PMT)represents GBM malignant progression and recurrence,which might be a breakthrough to understand GBM heterogeneity and overcome treatment *** is a complicated process influenced by crosstalk between GBM and tumor microenvironment,depending on intricate ligand-receptor *** this review,we summarize the autocrine and paracrine pathways in the GBM microenvironment and related ligand-receptor interactions inducing *** also discuss the current therapies targeting the PMT-related autocrine and paracrine ***,this review offers a comprehensive understanding of the failure of GBM-targeted therapy and ideas for future tendencies of GBM treatment.

关键词： Autocrine Glioblastoma Ligand-receptor interaction Microenvironment Paracrine Proneural-mesenchymal transition

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

僵尸网络仿真系统设计与实现

计算机应用与软件 2013年第1期30卷 301-305页

作者：欧阳赔苏璞睿和亮中国科学院软件研究所信息安全国家重点实验室北京100190

近年来,随着僵尸网络的发展,它所带来的安全威胁越来越严重,因此成为了国内外的研究重点。僵尸网络仿真是深入开展僵尸网络研究的基础,也是当前研究的热点。提出一种基于测试床的僵尸网络仿真方案。该方案利用可扩展语言对仿真场景进行... 详细信息

近年来,随着僵尸网络的发展,它所带来的安全威胁越来越严重,因此成为了国内外的研究重点。僵尸网络仿真是深入开展僵尸网络研究的基础,也是当前研究的热点。提出一种基于测试床的僵尸网络仿真方案。该方案利用可扩展语言对仿真场景进行定制描述,以此为基础,仿真系统通过仿真场景的封装、仿真场景的自动化配置、数据的采集与展示等关键技术和模块,实现了仿真场景可定制、仿真环境可自动部署、仿真过程可控制等仿真实验功能。最后,通过典型场景的仿真实验验证了该系统的有效性,并对仿真环境自动部署等功能的效率进行了评估。

关键词：僵尸网络僵尸网络仿真测试床仿真场景自动化配置

CO_2 processes in an alpine grassland ecosystem on the Tibetan Plateau

在线全文

学校读者我要写书评

暂无评论

Journal of Geographical Sciences 2003年第4期13卷 429-437页

作者： pei Zhiyong, ouyang Hua, ZHOU Caiping, XU Xingliang(Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China) Inst. of Geographic Sciences and Natural Resources Research CAS Beijing China

In this paper, the CO2 concentrations profile from 1.5 m depth in soil to 32 m height in atmosphere were measured from July 2000 to July 2001 in an alpine grassland ecosystem located in the permafrost area on the Tibetan Plateau, which revealed that CO2 concentrations varied greatly during this study period. Mean concentrations during the whole experiment in the atmosphere were absolutely lower than the CO2 concentrations in soil, which resulted in CO2 emissions from the alpine steppe soil to the atmosphere. The highest CO2 concentration was found at a depth of 1.5 m in soil while the lowest CO2 concentration occurred in the atmosphere. Mean CO2 concentrations in soil generally increased with depth. This was the compositive influence of the increasing soil moistures and decreasing soil pH, which induced the increasing biological activities with depth. Temporally, the CO2 concentrations at different layers in air remained a more steady state because of the atmospheric turbulent milking. During the seasonal variations, CO2 concentrations at surface soil interface showed symmetrical patterns, with the lowest accumulation of CO2 occurring in the late winter and the highest CO2 concentration in the growing seasons.

关键词： CO2 soil atmosphere alpine grassland Tibetan Plateau

口腔放射影像数字化技术在口腔科临床检验工作中的应用效果研究

在线全文

学校读者我要写书评

暂无评论

影像技术 2024年第2期36卷 20-24页

作者：欧阳佩佩河南护理职业学院河南455000

目的:通过对比实验研究口腔放射影像数字化技术在口腔科临床检验工作中的应用效果。方法:以本职业学院2022年1月-2023年12月治疗的120例患有口腔疾病的学生为研究对象,分别对其实施传统摄片技术检查与口腔放射影像数字化技术检查。在这... 详细信息

目的:通过对比实验研究口腔放射影像数字化技术在口腔科临床检验工作中的应用效果。方法:以本职业学院2022年1月-2023年12月治疗的120例患有口腔疾病的学生为研究对象,分别对其实施传统摄片技术检查与口腔放射影像数字化技术检查。在这一前提下,对比两种检查方法诊断各类口腔科疾病的准确率。结果:与传统摄片技术检查相比,口腔放射影像数字化技术检查诊断牙体病、牙周病、颌骨疾病的准确率均处于较高水平(P<0.05)。结论:针对口腔科疾病患者进行口腔放射影像数字化技术检查,可准确诊断牙体病、牙周病、颌骨疾病等各类口腔科疾病。

关键词：口腔疾病口腔放射影像数字化技术临床检验

Fluxes of CO_2,CH_4 and N_2O from alpine grassland in the Tibetan Plateau

在线全文

学校读者我要写书评

暂无评论

Journal of Geographical Sciences 2003年第1期13卷 27-34页

作者： pei Zhiyong,ouyang Hua,ZHOU Caiping,XU Xingliang(Inst. of Geographic Science s and Natural Resources Research, CAS, Beijing 100101, China) Inst. of Geographic Sciences and Natural Resources Research CAS Beijing China

Using stat ic chamber technique, fluxes of CO 2 , CH 4 and N 2 O were measured in the alpine grassland area from July 2000 to July 2001, d eterminations of mean fluxes showed that CO 2 and N 2 O were gene rally released from the soil, while the alpine grassland accounted for a weak CH 4 sink. Fluxes of CO 2 , CH 4 and N 2 O ranged widely. The highest CO 2 emission occurred in August, whereas a lmost 90% of the whole year emission occurred in the growing season. But the variations of CH 4 and N 2 O fluxes did not show any clear patterns over the one-year-experim ent. During a daily variation, the maximum CO 2 emission occurred at 16:00, and then decreased to the minimum emi ssion in the early morning. Daily pattern analyses indicated that the variation in CO 2 fluxes was positively related to air temperatures (R 2 =0.73) and soil temperatures at a depth of 5 cm (R 2 =0.86), whereas daily variations in CH 4 and N 2 O fluxes were poorly explained by soil temperatures and climatic va riables. CO 2 emissions in this area were much lower than other grasslands in plain areas .

关键词： CO 2 , CH 4 and N 2 O flux alpine grassland Tibetan Plateau

地屈孕酮联合黄体酮治疗黄体功能不全型先兆流产的临床疗效

在线全文

学校读者我要写书评

暂无评论

临床合理用药杂志 2020年第3期13卷 32-33页

作者：欧阳佩江西省南昌县中医院 330200

目的探讨地屈孕酮联合黄体酮治疗黄体功能不全型先兆流产的临床疗效。方法选取南昌县中医院2017年1月—2019年2月收治的黄体功能不全型先兆流产患者66例,采用随机数字表法分为常规组与试验组,各33例。常规组给予地屈孕酮治疗,试验组在... 详细信息

目的探讨地屈孕酮联合黄体酮治疗黄体功能不全型先兆流产的临床疗效。方法选取南昌县中医院2017年1月—2019年2月收治的黄体功能不全型先兆流产患者66例,采用随机数字表法分为常规组与试验组,各33例。常规组给予地屈孕酮治疗,试验组在对照组基础上给予黄体酮治疗。比较两组治疗前后激素〔人绒毛膜促性腺激素(HCG)、雌二醇(E2)、孕酮(P)〕水平、保胎成功率、不良反应发生率。结果治疗前两组HCG、E2、P水平比较,差异无统计学意义(P>0.05);治疗后试验组HCG、E2、P水平高于常规组(P<0.05)。试验组保胎成功率高于常规组,不良反应发生率低于常规组(P<0.05)。结论地屈孕酮联合黄体酮治疗黄体功能不全型先兆流产的临床疗效确切,可改善激素水平,提高保胎成功率,且安全性较高,有利于促进患者早日康复。

关键词：流产,先兆黄体功能不全型地屈孕酮黄体酮

硫酸镁联合硝苯地平治疗妊娠期高血压综合征的临床疗效

在线全文

学校读者我要写书评

暂无评论

临床合理用药杂志 2020年第6期13卷 24-25页

作者：欧阳佩江西省南昌县中医院 330200

目的探讨硫酸镁联合硝苯地平治疗妊娠期高血压综合征(妊高征)的临床疗效。方法选取南昌县中医院2017年1月—2019年1月收治的妊高征患者66例,按照奇偶法分为对照组与观察组,各33例。对照组予以硫酸镁治疗,观察组在对照组基础上加用硝苯... 详细信息

目的探讨硫酸镁联合硝苯地平治疗妊娠期高血压综合征(妊高征)的临床疗效。方法选取南昌县中医院2017年1月—2019年1月收治的妊高征患者66例,按照奇偶法分为对照组与观察组,各33例。对照组予以硫酸镁治疗,观察组在对照组基础上加用硝苯地平治疗。比较两组临床疗效,治疗前后收缩压、舒张压,并观察两组不良反应发生情况。结果观察组临床疗效优于对照组(P0.05);治疗后观察组收缩压、舒张压低于对照组(P<0.05)。观察组不良反应发生率低于对照组(P<0.05)。结论硫酸镁联合硝苯地平治疗妊高征的临床疗效确切,可有效改善血压,且安全性较高。

关键词：高血压,妊娠性硫酸镁硝苯地平治疗结果

在线全文

学校读者我要写书评

暂无评论

产业集群与湖南新型工业化

长沙民政职业技术学院学报 2006年第2期13卷 62-65页

作者：欧阳培长沙理工大学湖南长沙410077

通过理论与实践的分析表明,产业集群与新型工业化之间有着强烈的互动效应。文章重点分析了湖南发展产业集群的现状,提出了以新型工业化为导向,发展具有竞争力优势的产业集群,使之成为区域经济发展的新亮点。

关键词：产业集群新型工业化互动