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pin Gb fiber pair /s pair
λ
1
10
Gb /s
1
10
10
1
10
Mainstream 10G SMF (LR) also uses duplex LC connector & fiber cable
3-5 June 2013 3 NANOG 58 Meeting
Optics Specifications
(belly-to-belly)
(or 36x)
3-5 June 2013 12 NANOG 58 Meeting
Gen1 100G MMF: SR10 CFP / CFP2 / CXP
Electric I/O Optical I/O
pin Gb fiber pair /s pair
λ
1
Gb /s
5 NANOG 58 Meeting
3-5 June 2013
Pluggable Module Characteristics
■
■
■
the good (il buono) ● multiple applications supported ● pay as you go ● confined, replaceable failures ● common market ● specialized R&D & production the bad (il cattivo) ● increased component count ● SI complicated by I/O connector ● power increased by I/O SerDes ● density limited by SFP+ size & the ugly (il brutto) ● poor thermal interface ● heat localized at host front
300m 2dB 10GbE-SR
500m 3dB none
2km 4dB OC-192 SR-1 G.693 10G
10km 6dB 10GbE-LR
■ ■ ■ ■
300m (or 100m) for MMF interface is sufficient 500m, or 2km or 10km for SMF optics is insufficient Ask for 500m/3dB, or 2km/4dB, or 10km/6dB min. for SMF Sufficient loss gives plug and play: no link engineering!
Electric I/O Optical I/O
pin Gb fiber pair /s pair
Optics Technology Advances
North American Network Operators’ Group Meeting New Orleans, Louisiana 3-5 June 2013 Chris Cole
Outline
■ ■ ■ ■ ■ ■ ■
10G Optics Specifications Pluggable Modules 40G
Gen2 SMF: LR4 CFP2 / CFP4 / QSFP28
Electric I/O Optical I/O
pin Gb fiber pair /s pair
λ
Gb /s
1
4 25 100 100 4 25
3-5 June 2013
16
NANOG 58 Meeting
Future 40G & 100G Technologies
■
Four basic parameters determine link rate: ● Symbol rate (Baud) ● Number of fibers (Parallel) ● Number of wavelengths (WDM) ● Number of bits/symbol (modulation order) Higher Order Modulation (>1bit/symbol) example
(same for high density 10G MMF: SR parallel QSFP+)
4x10
4x10
3-5 June 2013
9
NANOG 58 Meeting
Multi-Link Example: 1UI Line Card Density
Form Factor Electrical I/O
Multi-link Modules
100G Board Mounted Optical Engines
■
■
400G
Summary
3-5 June 2013
2
NANOG 58 Meeting
Mainstream 10G MMF: SR NRZ XFP/SFP+
Electric I/O Optical I/O
■
■
■
40Gb/s per lane (Serial) ● 1x40G architecture ● Candidate to replace Copper wires for servers 50Gb/s per lanes ● 2x50G architecture ● 2x density improvement Parallel SMF ● Similar to SR4 but for SMF instead of MMF
duplex LC connector & SMF cable is same as 10GE-LR
3-5 June 2013 8
1
Transmission
0.1 0.01 0.001 1251 1271 1291 1311 1331 1351 1371 1391 Wavelength (nm)
NANOG 58 Meeting
Rows
10GE Ports
40GE Ports
Power
SFP+ QSFP+
1x10G 4x10G
Double Double
48 176
N.A. 44
~40W ~80W
CFP4 MLG
■ ■ ■
4x25G
Double
360
72
~120W
Integer multiple density increase Thermal load increase Single channel failure requires bringing down multiple links to replace
●
Ongoing industry debate about broad market potential for longer reach datacenter links ■ Board Mounted Optical Engines ■ Higher Order Modulation
3-5 June 2013 17 NANOG 58 Meeting
Board Mounted Optical Engine
3-5 June 2013
18
NANOG 58 Meeting
Board Mounted Optical Engine Card Example
3-5 June 2013
19
NANOG 58 Meeting
Higher Order Modulation
10
10
10 100
10 100
3-5 June 2013
13
NANOG 58 Meeting
Gen1 100G SMF: LR4 CFP
Electric I/O Optical I/O
pin Gb fiber pair /s pair
λ
Gb /s
10
1 4
10
25
100
100
3-5 June 2013
High Density 10G SMF: LR Parallel QSFP+
Electric I/O Optical I/O
Octopus break-out cable connects
QSFP+ 4x SFP+
pin Gb fiber pair /s pair
λ
1
Gb /s
10 4 4
10
3-5 June 2013 4 NANOG 58 Meeting
Optics Specification Example
Client optics specification reach (determines min. penalty) minimum loss budget 10G standard High density data center duplex or parallel MMF Structured data center duplex or parallel SMF Data center & General central office data center duplex SMF duplex SMF
3-5 June 2013 7
MPO connector
NANOG 58 Meeting
Mainstream 40G SMF: LR4 WDM QSFP+
Electric I/O Optical I/O
pin Gb fiber pair /s pair
λ
Gb /s
10 4

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Lesson 7The Scientific Aesthetics

Lesson 7The Scientific Aesthetics


整理课件
15
Para. 3: There should be close kinship between science and art.
What are Einstein and Feynman good at besides science? And Leonardo besides art?
you look at them for a long time.
整理课件
13
Page 129 Line 10: kinship
• family relation / consanguinity • What they want into and out of are the closed
systems defined by custom and kinship that demarcate the ends of the social spectrum. • From this perspective the interests of the indiv idual are bound up with the interest.
•In 1995, she was awarded the American Institute of
Physics Science Writing Award and has covered science
for The Los Angeles Times整理s课in件ce 1994.
4
The Text
• I recommend buying advance tickets, or the Par is Museum Pass, as doing so will allow you to bypass the lines using the Passage Richelieu, Porte des Lions, and Galerie du Carrousel entrances.
第二章光纤光栅用于检测冲击动力学...

第二章光纤光栅用于检测冲击动力学...

单位代码：１０３５９学号：全ＱＱ！鱼鲤！分类号：ＴＮ２５３夺肛工学犬警ＨｅｆｅｉＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ硕士学位论文ＭＡＳＴＥＲ，ＳＤＩＳＳＥＲＴＡＴＩｏＮ论文题目：基王迸红光翅的鲑枉泣圭塾力堂挂丝堡究学位类别：堂压亟士专业名称：测试计量撞苤及邀器作者姓名：篚航导师姓名：金直蕉教援完成时间：２Ｑ！垒生垒昱学位论文独创性声明本人郑重声明：所呈交的学位论文是本人在导＿ＩＩ币指导下进行独立研究工作所取得的成果。

据我所知，除了文中特别加以标注和致谢的内容外，论文中不包含其他人已经发表或撰写过的研究成果，也不包含为获得金壁兰些太堂或其他教育机构的学位或证书而使用过的材料。

对本文成果做出贡献豹个人和集体，本人已在论文中作了明确的说明，并表示谢意。

学位论文中表达的观点纯属作者本人观点，与合肥工业大学无关。

学位论文作者签名：薛航签名日期：≯／午年牛月巧日学位论文版权使用授权书本学位论文作者完全了解金ｇ墨工些盔堂有关保留、使用学位论文的规定，即：除保密期内的涉密学位论文外，学校有权保存并向国家有关部门或机构送交论文的复印件和电子光盘，允许论文被查阅或借阅。

本人授权金ｇ蒌互些太堂可以将本学位论文的全部或部分内容编入有关数据库，允许采用影印、缩印或扫描等复制手段保存、汇编学位论文。

（保密的学位论文在解密后适用本授权书）学位论文作者签名：替航签名日期：弘睁年午月习日论文作者毕业去向工作单位：联系电话：通讯地址：指导教师签名：签名日期：０。

ｆ￥年乒月拶日Ｅ．ｍａｉｌ：邮政编码：合肥ｊｌ：业大学硕士学位论文３．３．１钻具材料属性确定在网格划分前要先确定材料的属性。

固有频率是是结构本身固有的动态特性，与结构本身的材质、形状及约束条件相关。

在模态分析中必须给出的材料属性有弹性模量、密度和泊松比。

选用钻杆材质为合金钢，通过查阅机械设计手册可知合金钢钢的属性如表３．２所示。

表３．２钻杆材料属性表Ｔａｂ３．２Ｍａｔｅｒｉａｌｐｒｏｐｅｒｔｉｅｓｏｆ＆ｉｌｌｐｉｐｅ３．３．２单元选择和网格划分对于已经建立好的几何模型，需要对其网格划分，生成包含节点和单元的有限元模型。

艺术家克莱因作文素材

艺术家克莱因作文素材

艺术家克莱因作文素材英文回答，Klein is a renowned artist known for his unique style of painting. He was born in Nice, France in 1928 and was a prominent figure in the art world during the 20th century. Klein is best known for his creation of a unique shade of blue, which he called International Klein Blue (IKB). This particular shade of blue became atrademark of his work and was used in many of his paintings.Klein was also known for his use of unconventional materials in his artwork. He experimented with various techniques and mediums, including using fire and water to create his paintings. His innovative approach to art andhis use of vibrant colors set him apart from other artistsof his time.Klein's work has been exhibited in galleries and museums around the world, and his influence on the artworld continues to be felt today. He passed away in 1962 at the young age of 34, but his legacy lives on through hisart.中文回答，克莱因是一位著名的艺术家，以其独特的绘画风格而闻名。

介绍麦斯·米科尔森的英文作文

介绍麦斯·米科尔森的英文作文

介绍麦斯·米科尔森的英文作文Max mikelson was born in Copenhagen,Denmark in 1965.My father is a taxi driver.When he was young,he was a gymnast and later studied dance at the Ballet Academy in Gothenburg.There,he also learned to speak fluent Swedish.During his nearly ten-year career as a professional dancer,Max met choreographer Hannah Jacobson,and they married in 2000.In 1996,he left dance performance to study drama at the drama school and began his acting career.Max made his first film appearance in 1996,playing a drug dealer in Nicholas wending Raven's film pusher.This film was a success in the world,and later produced a sequel.In 2002,Max played a young doctor in"open the heart window",which won him the best actor award at the Rouen Nordic Film Festival.Max's breakthrough in his acting career was playing a sensitive policeman in Nils Arden oplev's Danish TV series team 1,which earned him the tvfestival DK's best actor award.In 2004,he became more famous internationally for playing Tristan in Jerry Bruckheimer's film King Arthur.Although the film received negative comments,it was a commercial success.In 2006,Mickelson played the villain in James Bond's 007:Casino Royale.In 2004,Max played a drug dealer in the last run 2.His performance was widely acclaimed,and he won the best actor award of the baudil award,the best actor award of the Zulu award and the best actor award of the Robert Film Festival.In 2000,Michelson married dance director Hannah Jacobson,and they havebeen together since 1987.They have a daughter and a son.Michelson lived in Copenhagen all his life,except for Toronto when he was filming Hannibal Lecter.Now,although he lives in Denmark,he also spends a lot of time in Mallorca,Spain,where the Michelson family has a house.In Danish opinion polls,he is often rated as the"sexiest man".。