期刊文献+
共找到16,440篇文章
< 1 2 250 >
每页显示 20 50 100
OPD-ScanⅢ及IOL-Master 700测量白内障术前角膜曲率和水平角膜直径的比较
1
作者 郭晓娜 陆惠 +2 位作者 寇豆 于璐 凌宇 《眼科新进展》 CAS 北大核心 2024年第5期391-395,共5页
目的比较OPD-ScanⅢ与IOL-Master 700在角膜曲率(平坦曲率K1与陡峭曲率K2)及水平角膜直径(WTW)测量上的差异性及一致性。方法选取2021年10月至2022年9月在航天中心医院眼科行白内障手术的患者268例328眼(右眼164例,左眼164例)。采用OPD-... 目的比较OPD-ScanⅢ与IOL-Master 700在角膜曲率(平坦曲率K1与陡峭曲率K2)及水平角膜直径(WTW)测量上的差异性及一致性。方法选取2021年10月至2022年9月在航天中心医院眼科行白内障手术的患者268例328眼(右眼164例,左眼164例)。采用OPD-ScanⅢ及IOL-Master 700仪器分别检测患者左右眼的K1、K2以及WTW值并进行分析比较。采用配对t检验进行参数比较;Pearson相关分析检测参数间的相关性;Bland-Altman以及组内相关系数(ICC)分析确定两种仪器相关参数测量的一致性。结果在左右眼参数的测量中,OPD-ScanⅢ测得的K1及K2值均大于IOL-Master 700,WTW值均低于IOL-Master 700的测量值,差异均有统计学意义(均为P<0.001)。OPD-ScanⅢ在左右眼中测得的K1、K2及WTW值与IOL-Master 700所测得的对应值均呈正相关,差异均有统计学意义(均为P<0.001)。两种仪器K1、K2及WTW值在95%一致性界限外的比例均在5%以内,但95%界限内差值绝对值均接近或超过了1.0 D,存在较大的临床偏差。ICC分析证实两种仪器左右眼测量K1及K2值一致性均极好(ICC>0.90)。两种仪器测得的WTW差值与K2值均显著相关(均为P<0.05)。WTW正偏差范围外有5例(83.33%)样本IOL-Master 700测得的K 2在47.03以上。结论OPD-ScanⅢ及IOL-Master 700在测量K1、K2及WTW上存在偏差,临床应用中不可互相替代。IOL-Master 700测得的WTW值大于OPD-ScanⅢ,当其测量的K2≥47.03时,所获得的WTW值参考价值可能有限。 展开更多
关键词 OPD-ScanⅢ IOL-master 700 角膜曲率 角膜水平直径
下载PDF
IOL Master 700与Lenstar LS900对高度近视合并白内障患者术前生物测量及人工晶状体计算的比较
2
作者 陶露莎 高铃 +3 位作者 喻娟 冯英 陈爽 吴敏 《国际眼科杂志》 CAS 2024年第4期612-617,共6页
目的:比较IOL Master 700与Lenstar LS900对高度近视合并白内障患者术前眼生物测量的差异性、相关性、一致性及人工晶状体(IOL)度数计算的准确性。方法:回顾性研究。收集2021-03/2023-03于陆军特色医学中心眼科行白内障超声乳化联合IOL... 目的:比较IOL Master 700与Lenstar LS900对高度近视合并白内障患者术前眼生物测量的差异性、相关性、一致性及人工晶状体(IOL)度数计算的准确性。方法:回顾性研究。收集2021-03/2023-03于陆军特色医学中心眼科行白内障超声乳化联合IOL植入手术的高度近视合并白内障患者136例136眼,平均年龄57.38±8.08岁。根据眼轴长度(AL)将患者分为3组:A组(26 mm≤AL≤28 mm)41眼,B组(28 mm30 mm)52眼。术前分别使用两种仪器测量AL、平均角膜曲率(Km)、前房深度(ACD)、晶状体厚度(LT)和白到白距离(WTW)。所有患者均采用Barrett UniversalⅡ公式计算IOL度数,个性化选择适宜的预留屈光度,比较两种仪器的预测屈光误差(PE)和绝对屈光误差(AE)。结果:三组患者中Lenstar LS900测量的AL和ACD均大于IOL Master 700测量值(均P<0.05),且两种仪器测量AL的平均差值C组>B组>A组。两种仪器测量LT、Km与WTW值均无差异(均P>0.05)。两种仪器所得各组生物参数均具有正相关性(均r>0.9,P<0.05)且一致性较好(95%LoA范围较窄)。两种仪器计算的AE无差异(P>0.05),但IOL Master 700计算的PE小于Lenstar LS900(P<0.05),且前者远视偏移百分比更低。结论:在高度近视合并白内障患者中,Lenstar LS900测量AL值大于IOL Master 700,且该差异随着AL的增加而增大,两种仪器对IOL的计算均具有良好的预测性,但IOL Master 700术后屈光误差更小,远视偏移百分比更低。 展开更多
关键词 IOL master 700 Lenstar LS900 高度近视 白内障 生物测量 眼轴 人工晶状体 Barrett UniversalⅡ
下载PDF
《广西植物》被国际知名数据库ICI World of Journals和ICI Journals Master List收录
3
《广西植物》 CAS CSCD 北大核心 2024年第3期F0002-F0002,共1页
日前,《广西植物》正式被波兰《哥白尼索引》(IC)旗下的两个知名数据库哥白尼索引期刊数据库(ICI World of Journals)和哥白尼索引精选数据库(ICI Journals Master List)全文收录,这是该期刊继被瑞典知名数据库(DOAJ)成功收录后的又一... 日前,《广西植物》正式被波兰《哥白尼索引》(IC)旗下的两个知名数据库哥白尼索引期刊数据库(ICI World of Journals)和哥白尼索引精选数据库(ICI Journals Master List)全文收录,这是该期刊继被瑞典知名数据库(DOAJ)成功收录后的又一大喜讯。 展开更多
关键词 数据库 World master ICI of 哥白尼
下载PDF
The Effectiveness of the Havriliak-Negami Model in Predicting the Master Curves of the Asphalt Blends with SBS Triblock Copolymer and Organic-Montmorillonite at Different Temperatures and Frequencies
4
作者 María Ángeles Vargas-Hernández Miguel Ángel Vargas +1 位作者 Pedro R. García-Morán Humberto Vázquez-Torres 《Journal of Materials Science and Chemical Engineering》 2024年第7期23-39,共17页
The dynamic viscoelastic properties of asphalt AC-20 and its composites with Organic-Montmorillonite clay (OMMt) and SBS were modeled using the empirical Havriliak-Negami (HN) model, based on linear viscoelastic theor... The dynamic viscoelastic properties of asphalt AC-20 and its composites with Organic-Montmorillonite clay (OMMt) and SBS were modeled using the empirical Havriliak-Negami (HN) model, based on linear viscoelastic theory (LVE). The HN parameters, α, β, G0, G∞and τHN were determined by solving the HN equation across various temperatures and frequencies. The HN model successfully predicted the rheological behavior of the asphalt and its blends within the temperature range of 25˚C - 40˚C. However, deviations occurred between 40˚C - 75˚C, where the glass transition temperature Tg of the asphalt components and the SBS polymer are located, rendering the HN model ineffective for predicting the dynamic viscoelastic properties of composites containing OMMt under these conditions. Yet, the prediction error of the HN model dropped to 2.28% - 2.81% for asphalt and its mixtures at 100˚C, a temperature exceeding the Tg values of both polymer and asphalt, where the mixtures exhibited a liquid-like behavior. The exponent α and the relaxation time increased with temperature across all systems. Incorporating OMMt clay into the asphalt blends significantly enhanced the relaxation dynamics of the resulting composites. 展开更多
关键词 ASPHALT BLENDS master Curve Linear Viscoelasticity Havriliak-Negami Model
下载PDF
Construction of the Genealogy of Eccentric Monks Based on the Historical Materials of Chan Buddhism in the Song Dynasty--From Enlightened Masters in Chan Buddhism,Sages,to Saints
5
作者 Jing-Jia Huang 《Cultural and Religious Studies》 2024年第8期501-511,共11页
Regarding the Chan Buddhism lamp records from the Song Dynasty and starting from Jing De Zhuan Deng Lu,the category of“enlightened masters in Chan Buddhism”禪門達者was listed separately,meaning a separate category w... Regarding the Chan Buddhism lamp records from the Song Dynasty and starting from Jing De Zhuan Deng Lu,the category of“enlightened masters in Chan Buddhism”禪門達者was listed separately,meaning a separate category was established for eccentric monks who pretended to be crazy,had unknown inheritance and miraculous deeds,and were difficult to classify.The following lamp records named this category of eccentric monks as“sages”散聖,or“saints”應化聖賢,which constructed another historical genealogy for the special Chan Buddhism eccentric monks.Moreover,the early lamp records included mostly idiosyncratic mad monks from previous dynasties.Since the Southern Song Dynasty,Chan Buddhism historical materials included many sages from the current dynasty.Therefore,this study mainly examines how the genealogy of Chan Buddhism eccentric monks was constructed in Song Dynasty Chan Buddhism lamp records,including quotations,and organizes the images of eccentric monks in the Song Dynasty,as written in Chan Buddhism historical materials,in order that the meaning of existence of these enlightened masters,sages,saints,etc.,included in the genealogy of Song Dynasty eccentric monks in the history of Chan Buddhism can be reflected. 展开更多
关键词 genealogy of eccentric monks enlightened masters in Chan Buddhism sages in Chan Buddhism saints in Chan Buddhism Song Dynasty
下载PDF
Problems and Countermeasures in the Training of Master of Translation and Interpreting Talents in the Context of Technological Empowerment
6
作者 Tangxikun He 《Journal of Contemporary Educational Research》 2024年第8期76-87,共12页
This paper aims to explore the problems and countermeasures in the training of Master of Translation and Interpreting(MTI)talents in the context of technological empowerment.Through methods such as questionnaires and ... This paper aims to explore the problems and countermeasures in the training of Master of Translation and Interpreting(MTI)talents in the context of technological empowerment.Through methods such as questionnaires and literature review,the study analyzes the problems in the training of MTI talents under technological empowerment and,by examining the feasibility and applicability of technologies,proposes countermeasures to these problems.The research finds that there are still problems in four areas:training concept,teaching content,research in the current training of MTI talents,and mutual empowerment of technology and education.Four countermeasures are suggested to address these problems,including utilizing technology to promote personalized training and optimize teaching content.This study provides valuable references for future educators to leverage technology in the training of MTI talents. 展开更多
关键词 PROBLEM COUNTERMEASURE Talent training master of Translation and Interpreting Technological empowerment
下载PDF
IOLmaster700与Lenstar测量青光眼合并白内障患者眼部生物参数的比较
7
作者 张婧 孙素芳 《中文科技期刊数据库(文摘版)医药卫生》 2024年第4期0009-0011,共3页
比较IOL Master 700与Lenstar在测量青光眼合并白内障患者的眼轴、角膜中央厚度以及前房深度等眼部参数的差异性、相关性和一致性。方法 选取2023年5-8月在复旦大学附属眼耳鼻喉科医院拟进行超声乳化人工晶状体植入联合房角分离术的患... 比较IOL Master 700与Lenstar在测量青光眼合并白内障患者的眼轴、角膜中央厚度以及前房深度等眼部参数的差异性、相关性和一致性。方法 选取2023年5-8月在复旦大学附属眼耳鼻喉科医院拟进行超声乳化人工晶状体植入联合房角分离术的患者61例(100只眼),分别进行IOL Master 700和Lenstar检查,其中每只受试眼IOL Master 700自动测量五次,Lenstar测量三次,分别取平均值。配对t检验和Pearson相关性分析分别对两种机器测得AL 、CCT、 AQD进行差异性和相关性分析。Bland-Altman分析IOL Master 700和Lenstar测量的AL 、CCT、AQD的一致性。结果 IOL Master 700与Lenstar测量所得的AL无显著统计学差异(P>0.05),CCT及AQD均有显著统计学差异(P<0.05)。通过Pearson相关分析,两种仪器所测的AL、CCT、AQD之间均有较好的相关性(r=0.960~1.000,p<0.001),且经Bland-Altman分析,这两种仪器在测量AL、CCT、 AQD等眼部生物参数时一致性较好。结论 IOL Master 700与Lenstar在测量眼轴、角膜中央厚度和前房深度时,有高度的一致性和相关性,临床上可以相互替代。 展开更多
关键词 IOL master700 LENSTAR 眼轴长度 角膜中央厚度 前房深度
下载PDF
Service Master COMPACT现场测量设备
8
作者 《传感器世界》 2024年第5期44-44,共1页
派克汉尼汾推出一款功能强大的测量设备Service Master COMPACT,为行走机械和工业液压应用提供实时监测和诊断服务。产品采用坚固的IP65防护级外壳及耐油性橡胶保护层,适用于工程机械、农业、铁路和国防等行业的恶劣工况。搭载4.3英寸... 派克汉尼汾推出一款功能强大的测量设备Service Master COMPACT,为行走机械和工业液压应用提供实时监测和诊断服务。产品采用坚固的IP65防护级外壳及耐油性橡胶保护层,适用于工程机械、农业、铁路和国防等行业的恶劣工况。搭载4.3英寸触摸屏和触感键盘的Service Master COMPACT让现场操作及数据分析流程变得简便。它能实时显示压力、温度和流量等关键参数,并支持通过按键或预设信号触发的数据记录功能。这一特性使得维护人员能够轻松识别潜在问题,避免可能引发的设备停机或损坏,进而降低维护成本。 展开更多
关键词 SERVICE 数据记录 恶劣工况 行走机械 工程机械 master 测量设备 现场测量
下载PDF
Innovation Transformation and Industry-Education Integration:A Study on the Integration Path of Guangxi Zhuang’s Intangible Cultural Heritage and Master of Arts Education in China
9
作者 Danya Liu Yujun Sun 《Journal of Contemporary Educational Research》 2024年第4期86-91,共6页
This study focuses on the master of arts education in higher education institutions in Guangxi Zhuang Autonomous Region of China,explores the path of integrating Guangxi Zhuang’s intangible cultural heritage with the... This study focuses on the master of arts education in higher education institutions in Guangxi Zhuang Autonomous Region of China,explores the path of integrating Guangxi Zhuang’s intangible cultural heritage with the teaching of master of arts,and puts forward the teaching mode of“thinking guidance-autonomous judgement-program construction.”A theoretical model of innovative transformation of intangible cultural heritage is also summarized.Through the development of this study,it is expected to further enrich the practical teaching mechanism of master of arts education in Chinese universities and form a master of arts teaching model with strong local cultural characteristics.At the same time,the teaching reform based on the integration of Guangxi Zhuang’s intangible cultural heritage and master of arts education also has strong practical significance for promoting the inheritance and innovation of Chinese intangible cultural heritage,promoting the development of cultural and creative industries,and serving the economic and social development of Guangxi. 展开更多
关键词 Intangible cultural heritage master of arts education Integration path Guangxi Zhuang Autonomous Region Teaching mode
下载PDF
莫廷ColomboIOL与卡尔蔡司IOLmaster500眼轴检出率的对比研究
10
作者 卢春明 《中国科技期刊数据库 医药》 2024年第4期0109-0112,共4页
对比研究莫廷 Colombo IOL眼科光学生物测量仪与卡尔蔡司IOL master 500眼科光学生物测量仪对行白内障术前检查的年龄相关性白内障患者的眼轴检出率。方法 选取我院于2022年1月至2023年5月期间内接收的需要进行白内障术前检查的年龄相... 对比研究莫廷 Colombo IOL眼科光学生物测量仪与卡尔蔡司IOL master 500眼科光学生物测量仪对行白内障术前检查的年龄相关性白内障患者的眼轴检出率。方法 选取我院于2022年1月至2023年5月期间内接收的需要进行白内障术前检查的年龄相关性白内障患者200名(388只眼)作为本次实验的测量对象,分别适用莫廷 Colombo IOL眼科光学生物测量仪与卡尔蔡司IOL master 500眼科光学生物测量仪对这200名年龄相关性白内障患者进行眼轴检测,并计算两种仪器的眼轴检出率,使用统计学方法做差异性分析。结果 在388眼中,莫廷 Colombo IOL眼科光学生物测量仪可以测出331只眼睛的眼轴数据,检出率为85.31%,卡尔蔡司IOL master 500眼科光学生物测量仪可以测出295只眼睛的眼轴数据,检出率为76.03%,两组数据对比检出率差异具有统计学意义,p<0.05。结论 在对年龄相关性白内障患者行白内障术前检查中,莫廷 Colombo IOL眼科光学生物测量仪的眼轴检出率高于卡尔蔡司IOL master 500眼科光学生物测量仪的眼轴检出率。 展开更多
关键词 莫廷 Colombo IOL眼科光学生物测量仪 卡尔蔡司IOL master 500眼科光学生物测量仪 白内障
下载PDF
Mind Master引导下的费曼学习法在骨科实习中的应用研究 被引量:5
11
作者 董军 张格林 +4 位作者 孙园 张旭艳 李玺 黄思华 张纯 《中国继续医学教育》 2023年第7期84-88,共5页
目的 探究Mind Master引导下的费曼学习法在骨科实习中的应用研究。方法 于2016年1月—2021年12月纳入西安交通大学第二附属医院骨三科实习医生分为传统教学法组(102名)和费曼学习法组(136名)。评估两组考核成绩和迷你临床演练评估(mini... 目的 探究Mind Master引导下的费曼学习法在骨科实习中的应用研究。方法 于2016年1月—2021年12月纳入西安交通大学第二附属医院骨三科实习医生分为传统教学法组(102名)和费曼学习法组(136名)。评估两组考核成绩和迷你临床演练评估(mini clinical evaluation exercise,Mini-CEX)量表结果。结果 费曼学习法组学生在理论成绩、实践成绩方面均显著优于传统教学法组,差异有统计学意义(P <0.05);在MiniCEX量表评估问诊、查体、专业态度、临床判断、整体临床评价以及评价人满意度方面显著优于传统教学法组,差异有统计学意义(P <0.05)。而在Mini-CEX量表评估的沟通技能、组织效能、被评价人满意度两组差异无统计学意义(P> 0.05)。结论 利用Mind Master归纳总结的费曼学习法教学模式能实习医生的理论和实践水平。 展开更多
关键词 费曼学习法 思维导图 骨科 教学 实习 规范化培训 临床
下载PDF
基于SVR和BP神经网络算法通过IOL Master 700测量数据来预测白内障术后CW弦
12
作者 李晨 《国际眼科杂志》 CAS 北大核心 2023年第12期2081-2086,共6页
目的:通过IOL Master 700观察白内障手术前后Chang-Warning弦(CW弦)的变化,并利用术前数据和人工智能预测模型预测术后CW弦。方法:研究对象为304例白内障患者,分析其术前及术后的IOL Master 700测量数据,包括散光矢量值、角膜平均曲率... 目的:通过IOL Master 700观察白内障手术前后Chang-Warning弦(CW弦)的变化,并利用术前数据和人工智能预测模型预测术后CW弦。方法:研究对象为304例白内障患者,分析其术前及术后的IOL Master 700测量数据,包括散光矢量值、角膜平均曲率、眼轴长度、前房深度、晶状体厚度、角膜中央厚度、白到白距离、浦肯野反射Ⅰ像相对于角膜中心的位置和瞳孔中心的位置、CW弦等。研究建立了基于SVR算法和BP神经网络算法的预测模型,通过术前CW弦及眼部生物参数来预测术后CW弦。结果:相比于白内障手术前,手术后左、右眼CW弦X分量向颞侧有轻微偏移,Y分量变化不大。使用术前CW弦和其他术前眼部生物参数作为输入数据,相比于BP神经网络,SVR模型能够更准确的对术后CW弦的X分量和Y分量做出预测。结论:CW弦可以用各种生物测量仪器、角膜地形图仪器或断层摄像仪器在同轴固定光下直接测量。使用SVR算法能够在白内障手术前较精准的对术后CW弦进行预测。 展开更多
关键词 alpha角 KAPPA角 Chang-Waring弦(CW弦) 深度学习 白内障 SVR算法 BP神经网络算法 IOL master 700
下载PDF
IOL Master联合A超在白内障超声乳化联合人工晶状体植入术中的应用 被引量:2
13
作者 唐浩英 张跃红 +4 位作者 黄丹菊 卢美仪 王璟 明国英 曾昭荣 《局解手术学杂志》 2023年第3期238-241,共4页
目的探讨IOL Master联合A超在白内障超声乳化联合人工晶状体(IOL)植入术中的应用价值。方法选取于佛山市三水区人民医院接受手术的老年白内障患者80例,按照随机数字表法分为A超组与联合组,每组40例。2组均接受超声乳化联合IOL植入术,A... 目的探讨IOL Master联合A超在白内障超声乳化联合人工晶状体(IOL)植入术中的应用价值。方法选取于佛山市三水区人民医院接受手术的老年白内障患者80例,按照随机数字表法分为A超组与联合组,每组40例。2组均接受超声乳化联合IOL植入术,A超组于术前使用接触式A超测量眼轴长度(AL)、前房深度(ACD)、晶状体厚度(LT),用Pentacam测量角膜曲率(K);联合组采用IOL Master 5.5联合A超获得上述参数。根据SRK-T公式计算IOL度数。比较2组患者术后3个月的裸眼远视力(UDVA)、裸眼中视力(UIVA)、裸眼近视力(UNVA)、屈光误差,并采用IOL植入术后视觉评估问卷调查患者术后情况(脱镜率、不良视觉现象、屈光满意度评分)。结果2组患者术后3个月的UDVA比较差异无统计学意义(P>0.05);联合组术后3个月的UIVA、UNVA均明显高于A超组,差异有统计学意义(P<0.05)。联合组散光1.0~1.5 D患眼的屈光误差及总屈光误差明显低于A超组,差异有统计学意义(P<0.05)。2组患者术后不良视觉现象发生率比较差异无统计学意义(P>0.05)。联合组脱镜率与屈光满意度评分均高于A超组,差异有统计学意义(P<0.05)。结论IOL Master联合A超可通过优势互补最大限度地降低屈光误差,使患者术后获得更理想的裸眼视力,更高的脱镜率与屈光满意度。 展开更多
关键词 白内障 超声乳化联合人工晶状体植入术 IOL master A超 眼轴长度
下载PDF
CASIA2与IOL Master 700测量白内障患者角膜屈光力及散光的差异性和一致性 被引量:2
14
作者 陶露莎 董登昊 +3 位作者 郎敏 陈爽 冯英 吴敏 《国际眼科杂志》 CAS 北大核心 2023年第6期1017-1023,共7页
目的:比较CASIA2与IOL Master 700测量年龄相关性白内障患者角膜屈光力和散光的差异性和一致性。方法:回顾性研究。选取2021-11/12在我院就诊的年龄相关性白内障患者153例232眼。分别采用CASIA2和IOL Master 700测量白内障患者角膜前、... 目的:比较CASIA2与IOL Master 700测量年龄相关性白内障患者角膜屈光力和散光的差异性和一致性。方法:回顾性研究。选取2021-11/12在我院就诊的年龄相关性白内障患者153例232眼。分别采用CASIA2和IOL Master 700测量白内障患者角膜前、后表面及全角膜的平坦轴角膜曲率(Kf)、陡峭轴角膜曲率(Ks)、平均角膜曲率(Km)、散光度数及轴向(矢量表示法J_(0)和J_(45))。分析两种仪器测量参数的差异性、相关性及一致性。结果:CASIA2与IOL Master 700测量角膜后表面J45值无差异(-0.006±0.038D vs-0.005±0.044D,P>0.05),其余参数均有差异(均P<0.05);两种仪器测量角膜前后表面及全角膜屈光力和散光均呈显著正相关(均r/r_(s)>0.7,P<0.001);Bland-Altman分析法显示角膜前表面屈光力及散光一致性较好,后表面及全角膜屈光力一致性较差。结论:CASIA2与IOL Master 700测量白内障患者角膜前表面屈光力、角膜前后表面及全角膜散光差异性较小,一致性较好,可以互相参考,而测量后表面及全角膜屈光力差异较大,不建议互换使用。 展开更多
关键词 CASIA2 IOL master 700 白内障 角膜屈光力 散光
下载PDF
Master crack types and typical acoustic emission characteristics during rock failure 被引量:2
15
作者 Tongbin Zhao Pengfei Zhang +3 位作者 Yaxun Xiao Weiyao Guo Yulong Zhang Xiufeng Zhang 《International Journal of Coal Science & Technology》 EI CAS CSCD 2023年第1期73-86,共14页
Acoustic emission(AE)signals contain substantial information about the internal fracture characteristics of rocks and are useful for revealing the laws governing the release of energy stored therein.Reported here is t... Acoustic emission(AE)signals contain substantial information about the internal fracture characteristics of rocks and are useful for revealing the laws governing the release of energy stored therein.Reported here is the evolution of rock failure with diferent master crack types as investigated using Brazilian splitting tests(BSTs),direct shear tests(DSTs),and uniaxial compression tests(UCTs).The AE parameters and typical modes of each fracture type were obtained,and the energy release characteristics of each fracture mechanism were discussed.From the observed changes in the AE parameters,the rock fracture process exhibits characteristics of staged intensifcation.The scale and energy level of crack activity in the BSTs were signifcantly lower than those in the DSTs and UCTs.The proportion of tensile cracks in the BSTs was 65%–75%,while the proportions of shear cracks in the DSTs and UCTs were 75%–85%and 70%–75%,respectively.During the rock loading process under diferent conditions,failure was accompanied by an increased number of shear cracks.The amplitude,duration,and rise time of the AE signal from rock failure were larger when the failure was dominated by shear cracks rather than tensile ones,and most of the medium-and high-energy signals had medium to low frequencies.After calculating the proposed energy amplitude ratio,the energy release of shear cracks was found to exceed that of tensile cracks at the same fracture scale. 展开更多
关键词 Rock failure Fracture mechanism Acoustic emission master crack type Energy release
下载PDF
IOL Master500和A超联合角膜曲率计测算白内障患者术后屈光度数的对比研究 被引量:1
16
作者 袁翊 朱娟芳 周津川 《浙江创伤外科》 2023年第7期1241-1244,共4页
目的通过对比IOL Master500(光学生物测量仪500)和A超联合角膜曲率计测算人工晶状体(intraocular lens,or IOL)度数的准确性,探讨两种方式对于白内障患者术后视力满意度的评价效果。方法选取2021年1月至2022年8月期间本院白内障患者120... 目的通过对比IOL Master500(光学生物测量仪500)和A超联合角膜曲率计测算人工晶状体(intraocular lens,or IOL)度数的准确性,探讨两种方式对于白内障患者术后视力满意度的评价效果。方法选取2021年1月至2022年8月期间本院白内障患者120例(120眼),按随机抽样法均分为对照组和观察组,各60例。对照组采用A超联合角膜曲率计测算晶体度数,观察组采用IOL Master500测算晶体度数,所有患者术前均完成两组检查方式的眼轴长度、前房深度和角膜曲率的采集;再根据两组各自数据,采用Haigis公式确定晶体度数,术中植入同一型号晶体。术后3个月复查实际屈光度数,分别计算两组术后绝对屈光度差值(MAE),分析差异是否具有统计学意义。结果①术前IOL Master500和A超测得的眼轴长度比较,在眼轴长度AL>26 mm组中,差异有统计学意义(P<0.05);②IOL Master500比A超测得的前房深度要长,差异有统计学意义(P<0.05);③术后3个月MAE≤0.50D、≤1.00D、≤1.50D中,IOL Master500绝对屈光度差值(MAE)分布情况均高于A超检查组。结论在两种方法均可测量的情况下,使用IOL Master500较A超联合角膜曲率计测量眼轴长度和人工晶状体度数的预测准确性更高,术后患者视力满意度也更好。 展开更多
关键词 IOL master500 A型超声 白内障 屈光误差
下载PDF
超声生物显微镜、IOL Master700和Pentacam HR在ICL术前眼部生物测量中的一致性评价 被引量:2
17
作者 田国川 《临床医学研究与实践》 2023年第11期106-109,共4页
目的评价高度近视时用超声生物显微镜(UBM)、IOL Master700和Pentacam HR测量的前房深度(ACD)值间的差异性、相关性及一致性;评价高度近视时UBM测量的水平睫状沟距离(STS)值与IOL Master700、Pentacam HR测量的水平角膜直径(WTW)值间的... 目的评价高度近视时用超声生物显微镜(UBM)、IOL Master700和Pentacam HR测量的前房深度(ACD)值间的差异性、相关性及一致性;评价高度近视时UBM测量的水平睫状沟距离(STS)值与IOL Master700、Pentacam HR测量的水平角膜直径(WTW)值间的差异性、相关性及一致性。方法选取本院52例(104眼)高度近视人工晶状体(ICL)手术前患者,分别使用UBM、IOL Master700和Pentacam HR对双眼行生物测量并记录数值。比较三种仪器测量的ACD值和STS/WTW值,分析其相关性、一致性。以IOL Master700测量的ACD平均值3.2 mm为界线,将患者分为A组(ACD值<3.2 mm,n=56)和B组(ACD值≥3.2 mm,n=48),比较两组经三种仪器测量的STS/WTW值。结果三种仪器测量的ACD值比较,差异无统计学意义(P>0.05)。UBM测量的STS值与IOL Master700和Pentacam HR测量的WTW值三者间比较,差异具有统计学意义(P<0.05)。IOL Master700与Pentacam HR测量的ACD值比较,差异无统计学意义(P=0.38),呈高相关性(r=0.93)。UBM测量的STS值分别与IOL Master700、Pentacam HR测量的WTW值比较,差异具有统计学意义(P<0.01),且呈低相关性。UBM测量的ACD值与IOL Master700和Pentacam HR测量的ACD值差值的一致性较差;IOL Master700和Pentacam HR测量的ACD值差值的一致性好。UBM测量的STS值与IOL Master700和Pentacam HR测量的WTW值三者两两之间差值的一致性较差。B组三种仪器测量的STS/WTW值高于A组(P<0.05),其中两组UBM测量的STS值差异最大。结论IOL Master700与Pentacam HR测量的ACD值的差异性小、一致性好,必要时临床上可相互参考替代。UBM测量的STS值与IOL Master700和Pentacam HR测量的WTW值三者之间差异性较大,一致性较差,不建议相互替代。ACD≥3.2 mm时建议联合UBM测量的STS值对ICL型号进行确定。 展开更多
关键词 超声生物显微镜 IOL master700 Pentacam HR 生物测量 一致性
下载PDF
Comparison of the Refraction Precision Results between Pentacam AXL and IOL Master 700 Using Universal II Barrett Formula after Cataract Surgery
18
作者 Budiman   Tjokrovonco Ludwig Melino +1 位作者 Sugiarti Emmy Dwi Knoch Andrew Maximilian 《Open Journal of Ophthalmology》 2023年第1期1-12,共12页
Background: The availability of premium intraocular lenses (IOL), including toric, multifocal, and EDOF, has become very sophisticated and now demands accurate biometric measurement accuracy. The Pentacam AXL and IOL ... Background: The availability of premium intraocular lenses (IOL), including toric, multifocal, and EDOF, has become very sophisticated and now demands accurate biometric measurement accuracy. The Pentacam AXL and IOL Master 700 are often used for optical biometry and they are available in the market today. They can also be used to measure the parameters needed in the IOL calculation using the latest generation formulas, such as the Barett Universal II. Therefore, this study aims to compare the accuracy of refraction results between Pentacam AXL compared to IOL Master 700 after cataract surgery with the Barett Universal-II formula. Method: A total of 64 eyes from 64 patients who had a preoperative examination with IOL Master 700 and Pentacam AXL were included in this study. Parameters such as K, ACD, LT, WTW, and AL were then compared between the two tools. Prediction error values were also calculated and compared based on the difference between the Spherical equivalent (SE) of subjective refraction results after 4 weeks of surgery with their refractive prediction targets. Results: There was no statistically significant difference in the parameters measured from the two tools except ACD and WTW. Furthermore, LT was difficult to obtain on the Pentacam AXL due to penetration problems, as well as in patients with significant lens opacities. The percentage of error prediction values that reach ± 0.50 D on Pentacam AXL and IOL Master 700 was 70.3% and 73.5%, respectively. However, the average prediction error that was close to emmetropia with IOL Master 700 was greater compared to the other tool. Conclusion: Pentacam AXL has a fairly good accuracy for refraction prediction compared to IOL Master 700. However, it is still necessary to optimize its constants to obtain optimal results. 展开更多
关键词 Error Prediction BIOMETRY IOL master 700 Pentacam AXL
下载PDF
A Trove of Masterpieces
19
作者 ZHANG HUI 《China Today》 2023年第11期34-37,共4页
The special exhibition“The Greats of Six Centuries:Masterpieces from the Museo Nacional Thyssen-Bornemisza,”held in Shanghai provides profound insight into the evolution of Western culture,lifestyle,and social lands... The special exhibition“The Greats of Six Centuries:Masterpieces from the Museo Nacional Thyssen-Bornemisza,”held in Shanghai provides profound insight into the evolution of Western culture,lifestyle,and social landscapes over the 600 years. 展开更多
关键词 master LANDSCAPE pieces
下载PDF
Confucius-The Storyofa Man Exemplary Masterof All Times-Confucius Culture Theme Exhibition
20
作者 Sun Ruochen Zhang Honglei 《China & The World Cultural Exchange》 2023年第8期12-16,共5页
The exhibition presents the life of Confucius and the essence of his thoughts through plates,accompanied by replicas of related cultural objects and cultural creative products,with the purposeof helping local people u... The exhibition presents the life of Confucius and the essence of his thoughts through plates,accompanied by replicas of related cultural objects and cultural creative products,with the purposeof helping local people understand the origin of Confucianism and presenting the modern charm of traditional culture. 展开更多
关键词 TIMES CONFUCIUS master
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部