检索结果-南通市图书馆

Materials Sciences and Applications 2017年第5期8卷 361-375页

作者： Mohammad S. Alsoufi dhia k. suker Mohammed W. Alhazmi Sufyan Azam Department of Mechanical Engineering College of Engineering and Islamic Architecture Umm Al-Qura University Makkah KSA

This paper deals with an assessment of the machined surface created by abrasive waterjet technology regarding its cutting performance versus profile, lagging and waterjet angle assessments. The results of the experiments presented in this study are with regard to Carrara marble. The machined surfaces were measured in seven different locations across a 40 mm depth of cut by a high precision contact-type profilometer and thus assessed using the standardized amplitude parameters of the profile distribution. The lagging and waterjet angle were also evaluated by creating a digital photo of the machined surface together with a reference gauge. The existence of machining mark. on the machined surface has been mostly noticeable in the bottom zone around ~20 mm depth of cut down to jet exit. This investigation leads to a conclusion that, stand-off distance and traverse rate play the roles of the utmost importance in considerations of the machined surface quality in contrast to abrasive mass flow rate. In addition, while the striation zone (rough surface) cannot be eliminated entirely, by selecting proper process parameters, a smooth cutting machined surface can be accomplished.

关键词： Sk.wness k.rtosis Lagging Waterjet Angle Abrasive WaterJet Carrara Marble

Influence of Abrasive Waterjet Machining Parameters on the Surface Texture Quality of Carrara Marble

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Surface Engineered Materials and Advanced Technology 2017年第2期7卷 25-37页

作者： Mohammad S. Alsoufi dhia k. suker Mohammed W. Alhazmi Sufyan Azam Department of Mechanical Engineering College of Engineering and Islamic Architecture Umm Al-Qura University Makkah KSA

Abrasive waterjet (AWJ) cutting technology has been used extensively for the cutting and processing of almost all engineering materials because of its precise cutting technique and the lack.of damage caused. Currently, the use of abrasive waterjet cutting in the natural stone industry is increasing. However, the effectiveness of abrasive waterjet cutting of natural stones is dependent on the rock.properties and machine operating parameters. Consequently, this paper presents the influence of abrasive waterjet machining parameters on the surface texture quality of Carrara marble. The results have shown that the abrasive waterjet cutting process offers better cut surface texture quality of Carrara marble under certain parameter conditions as well as being more environmentally-friendly. The stand-off distance shows the opposite effect on both surface roughness and waviness. With a view to reducing the machining costs, every user tries to select the traverse rate of the cutting head to be as high as possible, but results show that increasing the traverse rate always causes a corresponding increase in terms of inaccuracy, surface roughness, Ra ≈ 93.7 μm, and waviness, Wa ≈ 92.6 μm. The abrasive mass flow rate is not a significant parameter during the cutting process. In all investigations, it was found that the machined surface of the marble is smoother near the jet entrance, Ra ≈ 4 μm, and waviness, Wa ≈ 5 μm, and increasingly becomes rougher towards the jet exit. The result also shows that the micro-hardness value of the Carrara marble was in the range of 122 HV to 124 HV.

关键词： Abrasive Waterjet Carrara Marble Micro-Hardness Surface Roughness Waviness

Modelling of Al-Cu-Mg-Fe-Ni Aluminium Alloy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Metal 2012年第4期2卷 79-81页

作者： dhia k.dhm suker Department of Mechanical Engineering Umm Al-Qura University Makkah Saudi Arabia

Hot deformation characteristics of Al-Cu-Mg-Fe-Ni aluminium alloy have been studied in the temperature range 350°C - 450°C and strain rate range 0.001 - 0.4 s-1 using hot compression tests. The experimental results were used to develop a model for predicting the material characteristics during hot deformation. A series of plane-strain compression (PSC) tests were carried out at 950°C and a strain rate of 0.1, 1 and 10 s-1 to several strain levels.

关键词： Al-Cu-Mg-Fe-Ni Aluminium Alloy Hot Deformation Modelling

Predicting Grain Orientations of 316 Stainless Steel Using Convolutional Neural Network.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Intelligent Automation & Soft Computing 2024年第5期39卷 929-947页

作者： dhia k.suker Ahmed R.Abdo k.alid Abdulk.aliq M.Alharbi Mechanical Engineering Department College of Engineering and ArchitectureUmm Al-Qura UniversityMakkah21955Saudi Arabia

This paper presents a deep learning Convolutional Neural Network.CNN)for predicting grain orientations from electron back.catter diffraction(EBSD)*** proposed model consists of multiple neural network.layers and has been trained on a dataset of EBSD patterns obtained from stainless steel 316(SS316).Grain orientation changes when considering the effects of temperature and strain rate on material *** deep learning CNN predicts material orientation using the EBSD method to address this *** accuracy of this approach is evaluated by comparing the predicted crystal orientation with the actual orientation under different conditions,using the Root-Mean-Square Error(RMSE)as the *** show that changing the temperature causes different grain orientations to form,meeting the *** investigations were conducted to validate the results.

关键词： CNN deep learning EBSD grain orientation machine learning

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

皇明：让太阳能走进千家万户

商业周刊（中文版） 2009年第5期 18-19页

作者：李茸（Charlotte Li）吴亚锋（suker Wu）

清明节长假里的一天上午，山东省德州市中心的街道上还一片寂静，但在城东的经济技术开发区，皇明集团总部内外早已人来车往。上百名参观者在导游带领下，分批走入一座由前后两栋大楼组成的建筑——这两栋偻的外形非同寻常，从头到脚各... 详细信息

清明节长假里的一天上午，山东省德州市中心的街道上还一片寂静，但在城东的经济技术开发区，皇明集团总部内外早已人来车往。上百名参观者在导游带领下，分批走入一座由前后两栋大楼组成的建筑——这两栋偻的外形非同寻常，从头到脚各自支撑起一个庞大的马蹄形钢架结构。数百米开外，数座行将封顶的建筑周围，往来的卡车带起缕缕尘埃。这里就是2010年第四届世界太阳城大会的会址——紧锣密鼓建设中的“中国太阳谷”。

关键词：太阳能经济技术开发区集团总部清明节市中心山东省参观者建筑

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

创"皂"快乐

北方航空 2005年第1期 42-页

作者： suker

开封星尚创皂馆不知道从什么时候开始,diy成了生活中的潮流与时尚,如果凡事你都喜欢自己动手,那么我相信你是年轻的,至少你拥有一颗年轻的心.

关键词：时尚开封潮流

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

忧国忧民岳阳楼

北方航空 2004年第6期 53-页

作者： suker

没有文化灵魂的城市是一座乏味的城市,有了文化灵魂而不加以整饰、洗濯与珍爱,是一座令人可惜的城市.在休闲经济大行其道、旅游产业持续走旺的21世纪,谁在发掘、捕捉与增添城市的文化神韵呢?这是一个值得探索的问题.

关键词：文化灵魂城市休闲经济文化神韵旅游产业整饰捕捉

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

沃尔玛：打造绿色供应链

商业周刊（中文版） 2009年第5期 26-27页

作者：亚当·阿斯顿（Adam Aston）吴亚锋（suker Wu）（译）

这家零售商正在力推中国供应商加强节能、提高能效。

关键词：绿色供应链沃尔玛中国制造业供应商零售商

中国的绿色变革——《商业周刊》评选出10家为中国环境改善做出显著贡献的公司

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

商业周刊（中文版） 2009年第5期 14-17页

作者：亚当·阿斯顿（Adam Aston）李茸（Charlotte Li）吴亚锋（suker Wu ）（译）

经济增长是中国的生命线。一代人的时间里，中国成为世界工厂。数以亿计的农民离开故土走入城镇，脱离贫穷迈向小康。为接纳新生的工人阶级，一座座大城市一夜之间拔地而起。经历了20年的双位数增长后，中国有望在未来10年内成为全球最... 详细信息

经济增长是中国的生命线。一代人的时间里，中国成为世界工厂。数以亿计的农民离开故土走入城镇，脱离贫穷迈向小康。为接纳新生的工人阶级，一座座大城市一夜之间拔地而起。经历了20年的双位数增长后，中国有望在未来10年内成为全球最大的经济体。

关键词：《商业周刊》中国环境改善公司评选变革经济增长世界工厂

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国汽车市场

商业周刊（中文版） 2009年第6期 14-18页

作者：伊恩·罗利（Ian Rowley）李茸（Charlotte Li）吴亚锋（suker Wu）杨鸣娟（译）

今年4月上海车展的参展情况说明了一切：在主要的汽车厂商中，没有哪家敢错过此次盛会。去年冬季，日产公司没有参加在底特律举办的北美车展；今年秋季，可能还会有多家公司缺席东京车展。而相比之下，上海车展的耀眼光环和迷人魅力却... 详细信息

今年4月上海车展的参展情况说明了一切：在主要的汽车厂商中，没有哪家敢错过此次盛会。去年冬季，日产公司没有参加在底特律举办的北美车展；今年秋季，可能还会有多家公司缺席东京车展。而相比之下，上海车展的耀眼光环和迷人魅力却依然如故。保时捷甚至决定在101层高的上海柏悦酒店举办盛大活动，发布新款豪华轿跑车Panamera，而不是选在法兰克福或底特律发布这款新车。

关键词：中国汽车市场日产公司汽车厂商参展情况法兰克福底特律车展上海