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wh
发帖数: 141625 | 2 又看到个Suzanne的八卦，深夜贴一个 :P
Leonard Cohen - Suzanne
Perhaps his most memorable song from Canadian poet/songwriter & performer
Leonard Cohen. Cohen specified, notably in a BBC interview, that the song
was about encountering Suzanne Verdal, the then wife of sculptor Armand
Vaillancourt, in a Montreal setting. Indeed, many lines describe different
elements of the city, including its river (the Saint Lawrence) and a little
chapel near the harbour, called Notre-Dame-de-Bon-Secours (literally Our
Lady of ... 阅读全帖 |
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F**********e
发帖数: 2135 | 3 说是两个音的频率之比如果能simplify，听上去就和谐。比如E/A=330/4
40=3/4，所以很和谐。挺有意思的。
Note Frequency (Hz) Wavelength (cm)
C4 261.63 132.
C#4/Db4 277.18 124.
D4 293.66 117.
D#4/Eb4 311.13 111.
E4 329.63 105.
F4 349.23 98.8
F#4/Gb4 369.99 93.2
G4 392.00 88.0
G#4/Ab4 415.30 83.1
A4 440.00 78.4
A#4/Bb4 466.16 74.0
B4 493.88 69.9
C5 523.25 65.9 |
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p*****y
发帖数: 1049 | 4 • High resolution 16.3 megapixel CMOS sensor captures outstanding
image detail with pixels to spare.
• High sensitivity 80-12800 ISO range with improved noise
performance
throughout, including ISO-specific noise reduction.
• Speedy 6-7 FPS framerate captures fast action shots in demanding
situations.
• Highly responsive and accurate 11 point SAFOX IX+ autofocus
system
features a dedicated AF assist lamp and light wavelength sensor for
improved focus speed and |
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D3
发帖数: 1949 | 5 我说的是纳米材料，不巧的是我还做过一段纳米材料的研究，这东西并不是越小越好，
而且超过100nm的绝对不叫做纳米材料或纳米技术。
N当年推出这个东西来我是第一个跳出来骂尼康忽悠人的（没记错的话应该是06年的105
VR)，因为近波段才能发生干涉或者衍射是个简单的物理常识。但是N通过在不同镜面
上进行多层纳米涂层叠加，算是巧妙地解决了眩光和内反射的问题（很大程度上解决）
，这个在设计上还是有相当难度的，而且不同镜头涂层数和涂层位置都不同，和简单的
光学涂层增加透射率相比来讲难度要大得多。
N当年也展示过无涂层，1层和9层的区别，差别还是很明显的。
Sub-Wavelength是到不了纳米级别的，C只是说"fine structure"。
24G用的10层nano-coating, 是标准的纳米材料。
至于你说的这个“武断”部分正确，因为C的镜头我没试过，但我的老D头和AIS头在逆
光下都有明显的眩光或者鬼影，但24-70，14-24，24 1.4的我都试过基本正对太阳照的
，没有发现这种现象。
最简单的你拿你的L头出去试一下就知道了。
没有工业应用的。N的所谓纳米技术，也就是100nm |
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S******n
发帖数: 5022 | 6 SONY V5
Patent literature, self-interpretation and summary
Patent Publication No. 2011-216701
Published 2011.10.27
Photochromic film
Light transmittance varies depending on the intensity of incident
light
Low and high light transmittance of incident light
The material is used for hexa aryl bis imidazole derivatives
Measure the amount of light absorbed by the photochromic film
Photochromic film is the wavelength (RGB) for each different material,
wh... 阅读全帖 |
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t****g
发帖数: 35582 | 7 你们这是生物的near-field定义？
near field imaging难道不是通过让objective靠近object到sub wavelength的距离，
然后把evanescent wave couple进来，beat diffraction limit么？
从这个角度上讲，当时收集了不能propagate的k vector了。 |
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g*******n
发帖数: 1188 | 8 不就是wavelength dependent focal length么 |
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m****7
发帖数: 14685 | 9 sub wavelength coating, 24L2屁股上的膜 |
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t****g
发帖数: 35582 | 10 x3本来各层就是靠不同的band gap engergy来决定吸收谱的吧，不是靠multi layer
filter。
multi layer filter很容易做成想要的central wavelength和bandwidth，但是明显和
cmos工艺不兼容。 |
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k******a
发帖数: 2436 | 11 This is false. Since by definition a color mask will "mask" all other lights
and only allow the desired wavelength to pass through.
In the bayer pattern sensors, the 马赛克 is color filters (is this what you
mean by mask?) and the photodiode is at the bottom.
In the case of X3, the photodiode is stacked up so they do not have color
filters or masks.
率的 |
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P*******L
发帖数: 2637 | 12 http://graphics.stanford.edu/courses/cs178/lectures/sensors-26a
Page 44
x3 的特点如下：
- longer wavelengths penetrate deeper into silicon, so arrange a set of
vertically stacked detectors
- top gets mostly blue, middle gets green, bottom gets red
- no control over spectral responses, so requires processing
- fewer moire artifacts than color filter arrays + demosaicing
- but possibly worse noise performance, especially in blue |
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B*******e
发帖数: 3882 | 13 看 了一下 ieee 的评论， 查了一下nature 原文的摘要。 这个报道有点问题。
这是原摘要：
“ 。。。。Graphene has attracted large interest in photonic applications
owing to its promising optical properties, especially its ability to absorb
light over a broad wavelength range, which has lead to several studies on
pure monolayer graphene-based photodetectors. However, the maximum
responsivity of these photodetectors is below 10 mA W−1,
which significantly limits their potential for applications. Here we report
high photore... 阅读全帖 |
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x****y
发帖数: 1853 | 14 I don'think you can separate color from contrast, because the contrast
between color is due to the lens transmitting various wavelengths
differently, on top of other factors, such as stray reflected light inside
the lens, chromatic aberration, and light transmission through the glass-air
gap, all of which contribute to the loss of contrast and desaturation in
color, and all can be improved with better lens design.
You can argue that you may fix all these in post processing (which I doubt)
, but... 阅读全帖 |
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P***P
发帖数: 1387 | 15
Color Frequency Wavelength
violet 668–789 THz 380–450 nm
blue 631–668 THz 450–475 nm
cyan 606–630 THz 476–495 nm
green 526–606 THz 495–570 nm
yellow 508–526 THz 570–590 nm
orange 484–508 THz 590–620 nm
red 400–484 THz 620–750 nm |
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P***P
发帖数: 1387 | 16
600是橙, 橙子的橙, 小心橙子根你拼命说她是红的. 红绿灯那大红肯定是那张750纯种红
Color Frequency Wavelength
violet 668–789 THz 380–450 nm
blue 631–668 THz 450–475 nm
cyan 606–630 THz 476–495 nm
green 526–606 THz 495–570 nm
yellow 508–526 THz 570–590 nm
orange 484–508 THz 590–620 nm
red 400–484 THz 620–750 nm |
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m**d
发帖数: 21441 | 17 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
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H********g
发帖数: 43926 | 18 要得！这么好的神学启蒙很适合美国学童。
英文版如下
http://www.fyears.org/2010/02/buffalible-genesis/
1:01 In the beginning God created the heaven and the earth.
1:02 The singularity was without form, and void, and all the laws of physics
were not suitable.
1:03 And God said, Let there be light, and there was light. And God saw the
light, that it was good; and God set the speed of light to 299,792,458 m/s,
and it was always the same, no matter how the reference changing.
1:04 God said that light in the wavelength between... 阅读全帖 |
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H********g
发帖数: 43926 | 19 20kHz 340m/s, wavelength=1.7cm
从共振频率看不是博导 |
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R******d
发帖数: 5739 | 20 http://www.mysearch.org.uk/website1/html/543.Uncertainty.html
quote
In this case, we are simply assuming that the wave number distribution f(k)
corresponds to the diagram on the left, which then has a corresponding
probability density |Ψ(x)|2, as shown on the right. We can characterise
this relationship by pointing out that when the wave number distribution is
wider, i.e. lots of wavelength components, the probability density
distribution is narrower. However, we shall proceed using a Gaussian w... 阅读全帖 |
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l*******t
发帖数: 1016 | 21 energy is never created or destroyed! where does it come from?
wavelength can be converted into photon! how?
matter can be converted into massive energy! why?
Much more diseases are coming out than the no-science ages!
Science nowadays only gradually proves the religion central dogma! |
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v**e
发帖数: 8422 | 22 有本书是讲NED的.
Trojan Horse:
The National Endowment for Democracy
excerpted from the book
Rogue State
A Guide to the World's Only Superpower
by William Blum
Common Courage Press, 2000
How many Americans could identify the National Endowment for Democracy? An
organization which often does exactly the opposite of what its name implies.
The NED was set up in the early 1980s under President Reagan in the wake of
all the negative revelations about the CIA in the second half of the 1970s.
The latter was a... 阅读全帖 |
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l*******e
发帖数: 3584 | 23 来自主题: TrustInJesus版 - 仿生发明 Contact Lenses of the Future Inspired by Gecko Eyes
壁虎眼睛与未来隐形眼镜
(image via: jurvetson)
Feet aren’t the only part of gecko anatomy that’s got engineers excited.
Scientists have discovered that geckos have a series of distinct
concentric zones in their eyes that make it possible for them to see
colors at night, an ability few other creatures have. These zones have
different refractive powers, giving geckos a multifocal optical system
that allows light of different wavelengths to focus on the retin... 阅读全帖 |
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l*****a
发帖数: 38403 | 25 Plants are able to remember information and react to it, thanks to an
internal communications system that can be likened to a central nervous
system in animals, according to a new study by a Polish plant biologist.
Plants "remember" information about light, and a certain type of cell
transmits that information, much like nerves do in animals.
In the study, which was published in the early online version of the
journal Plant Cell July 16, the researchers found that light shone on
one leaf of an A... 阅读全帖 |
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b*****l
发帖数: 3821 | 26 这个里面11楼有些评价：
http://forums.randi.org/showthread.php?t=88831
“The UV spectroscopy is just wrong. The spectrum he presents for ethanol
just is not the UV spectrum of ethanol, period. He then seems to be saying
that the potentised remedies are less absorbent than the solvent. I could
see no data supporting his contention that he could tell different potencies
or different remedies apart.
If in fact what he says is true (that ethanol has significant UV absorbance
at 320nm which is eliminated when th... 阅读全帖 |
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C********g
发帖数: 9656 | 27 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
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s*****n
发帖数: 536 | 28
^^^^^^^
I am not good at it.
DWDM is dense wavelength Division Multiplexing.
Now you can understand it...:) |
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l****e
发帖数: 476 | 29 Lao biao, givemme a link to your Project.
so you mean shared capacity for difference links, based on some media
access control techniques? or just they are physically seperated 'coz of
different wavelength? is optical amplifier/sensor good enuf to carry
all of them without a glitch?
that will worth a hit. what's his next startup? :))
that sounds neat, what are the bus you guys are using in your projects?
CSCO's bus are TDM based and they also use some PCI bus for datapacket
forwarding. and what |
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k*****a
发帖数: 1518 | 30 【 以下文字转载自 ChinaNews 讨论区 】
【 原文由 kangjia 所发表 】
◇◇新语丝(www.xys.org)(xys.dxiong.com)(xys1.dyndns.org)(xys.3322.org)◇◇
东南大学校长、中国工程院院士顾冠群国家自然科学基金项目剽窃外国同行成果
剽窃发表的文章：《IP over WDM网络集成动态路由算法研究》
作者：李仕锋、顾冠群
单位：东南大学计算机科学与工程系，教育部计算机网络和信息集成重点实验室
发表于《现代有线传输》2002年6月第二期
主办单位: 信息产业部电信科学技术第五研究所 四川省成都市大慈寺路22号
编辑出版: 现代有线传输编辑部
该文注明受国家自然科学基金重大研究计划项目（901040009/F020303）和江苏
省自然科学基金项目（BK2001205）资助。
该自然科学基金项目名称：下一代网络服务体系结构极其关键技术的研究
被剽窃的原文是“Integrated Dynamic IP and Wavelength Routing in IP
over WDM Network”，
发表在In Proceedin |
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w********1
发帖数: 3492 | 31 Fri, 08 Jun 2012 07:25:53 PDT
Bloomberg Businessweek publishes a new profile of Phil Schiller, Apple
senior vice president of marketing who served for years as Steve Jobs' right
-hand man regarding the company's public presentations and comments, but who
has also been intimately involved in product development and positioning.
He helped Apple’s late CEO work through the meat-and-potatoes of creating
new products: Defining target markets, determining technical specs, setting
prices. It was Schill... 阅读全帖 |
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h*i
发帖数: 3446 | 32 太容易了： 同一束光（by defintion, same wavelength)，前后两次给你看，两次光
的强度不同，你会看到不同的颜色。
一百多年的实验结果你可以不信，但可以自己作实验嘛，有点科学精神噻，不要坐在那
里思辨，驳倒驳不倒又如何？ |
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a**********k
发帖数: 1953 | 33 Also, there are various types of fiber SFPs, depending on the
laser wavelength used. For example, 1550nm laser
can travel longer than 1310nm laser without amplification.
If you want to use long distance fiber, make sure to use LR
(long reach) SFPs instead of MR or SR ones. |
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c**i
发帖数: 6973 | 34 Ray Rivera and Al Baker, To Prevent Escapes, Police Start Scanning Irises of
Suspects; Privacy worries over a program instituted after two embarrassing
cases. New York Times, Nov. 16, 2010.
http://www.nytimes.com/2010/11/16/nyregion/16retinas.html?_r=1&scp=2&sq=iris%20scan&st=cse
Quote:
"With the new system, the authorities are using a hand-held scanning device
that can check a prisoner’s identity in seconds
"The technology uses high-resolution images to identify unique patterns in
the iris, the... 阅读全帖 |
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g******s
发帖数: 410 | 36 Aer you sure? I kinda remember that to do spatial multiplexing the channels
seen from different antennas should be independent. Accordlingly, the
distance between two antennas needs to be larger than some fraction of the
wavelength. Although in reality, coherence between channels due to
insufficient antenna separation or less rich scattering propagation would
reduce the performance. Correct me if I'm wrong. I really need reflash my
knowledge. |
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i****x
发帖数: 17565 | 37 懒得跟民科废话了，自己读去吧。
http://en.wikipedia.org/wiki/Ionizing_radiation
Ionizing (or ionising) radiation is radiation that carries enough energy to
liberate electrons from atoms or molecules, thereby ionizing them. Ionizing
radiation comprises subatomic particles, ions or atoms moving at
relativistic speeds, and electromagnetic waves on the short wavelength end
of the electromagnetic spectrum. Gamma rays, X-rays, and the upper vacuum
ultraviolet part of the ultraviolet spectrum are ionizing, whereas the... 阅读全帖 |
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d**********6
发帖数: 4434 | 38 他说的是根据现在已有的天文学观察结果所推算的引力波波长很长
如果是宇宙大爆炸初期的原初引力波，足足有十几光年
但不是说所有引力波都很长
than
wavelengths |
|
发帖数: 1 | 39 For CMOS image sensor makers, they should make full spectrum low-light
sensors by removing both UV filter and NIR filter. Because CMOS sensor
naturally responses to 300nm ~ 1200nm wavelength, much wider than visible
range, adding additional filters is unnecessary for machine vision
application. Without these filters, camera can response in much lower lux
condition.
Canon has just introduced 19um x 19um 2.2M pixels 35MMFHDXS sensor
https://www.engadget.com/2018/04/04/canon-slow-mo-low-light-senso... 阅读全帖 |
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i**e
发帖数: 91 | 40 RFID
(pronounced as separate letters) Short for radio frequency
identification, a technology similar in theory to bar code
identification. With RFID, the electromagnetic or electrostatic coupling
in the RF portion of the electromagnetic spectrum is used to transmit
signals. An RFID system consists of an antenna and a transceiver, which
read the radio frequency and transfer the information to a processing
device, and a transponder, or tag, which is an integrated circuit
containing the RF circuitr... 阅读全帖 |
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s******o
发帖数: 298 | 41 By Robert Roy Britt
Senior Science Writer
posted: 09:04 am ET, 05 April 2002
A systematic survey of the asteroid belt done in infrared wavelengths
indicates that there could be two or three times more large asteroids, those
more than 1 kilometer (0.6 miles) in diameter, than had been thought.
Based on observations of portions of the main asteroid belt, between Mars and
Jupiter, the new study estimates there are between 1.1 million and 1.9
million of these large space rocks. Many millions or perh |
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s******o
发帖数: 298 | 42 A solar flare is an explosion on the Sun that happens when energy stored in
twisted magnetic fields (usually above sunspots) is suddenly released. Flares
produce a burst of radiation across the electromagnetic spectrum, from radio
waves to x-rays and gamma-rays.
Scientists classify solar flares according to their x-ray brightness in the
wavelength range 1 to 8 Angstroms. There are 3 categories: X-class flares are
big; they are major events that can trigger planet-wide radio blackouts and
long-la |
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s******o
发帖数: 298 | 43 New Observations of Early Universe Help Confirm Theories of Formation
By Robert Roy Britt
Senior Science Writer
posted: 11:00 am ET
23 May 2002
The most detailed glimpse ever gained of the early universe shows ripples in
space back before there were any stars. This finding adds support to theories
of how the universe began in an initial Big Bang, inflated rapidly, then
developed the first galaxies.
The new view, imaged in microwave wavelengths not visible to the eye, shows
the earliest fluctuati |
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s*****t
发帖数: 1994 | 44 The Galactic Center - A Radio Mystery
Explanation: Tuning in to the center of our Milky Way galaxy, radio astronomers explore a
complex, mysterious place. A premier high resolution view, this startlingly beautiful picture
covers a 4x4 degree region around the galactic center. It was constructed from 1 meter
wavelength radio data obtained by telescopes of the Very Large Array near Socorro, New
Mexico, USA. The galactic center itself is at the edge of the extremely bright object |
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S***n
发帖数: 330 | 45 Tariq Malik
SPACE.com Managing Editor
SPACE.com tariq Malik
space.com Managing Editor
space.com – Thu Apr 29, 12:01 pm ET
This story was updated at 10:51 a.m. EDT.
A huge NASA balloon loaded with a telescope painstakingly built to scan the
sky at wavelengths invisible to the human eye crashed in the Australian
outback Thursday, destroying the astronomy experiment and just missing
nearby onlookers, according to Australian media reports.
In dramatic video released by the Australian Broadcasting Co |
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s*****t
发帖数: 1994 | 46 BEIJING -- China is about to join the hunt for dark energy. At a cosmology
workshop held here on 20 March, scientists unveiled Tianlai, or "Sound of
Heaven," a project to listen to radio emissions from deep space that may
reveal the nature of dark energy.
Dark energy is the mysterious force driving the accelerating expansion of
the universe. Although not directly observable, the phenomenon "can be
studied by observing the expansion rate of the universe at different epochs,
" says Tianlai project... 阅读全帖 |
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d*********e
发帖数: 3835 | 47 Responsibilities
• Lead reliability work and qualification of wavelength tunable laser
chip and package. • Effectively communicate reliability of complex,
new type of laser chip to customers • Failure Reliability, and
Materials Characterization in Semiconductor Process Development,
Manufacturing, and Reliability Qualification.
• Experience in Semiconductor technology: CMOS, III-V, HEMT, Lasers,
IR Detectors, Power Diodes, AMLCD Skills/Experience:
• Root Cause Analys |
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