k*******r
发帖数: 16963 | 1 来自主题: Mathematics版 - help How to prove it without rank, det etc.
Just use the basic definition of invertible matrix:
if AB=BA=I,A and B are invertible. |
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f**d
发帖数: 768 | 2 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
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g*****n
发帖数: 21539 | 3 一般图片的调整要注意的就是三点， 暗调如何变化的， 亮调以及中灰部分， 这个图
片里暗的地方明显偏蓝， 最深的该是黑色的部分三个通道均被消减， 而蓝色大大突出
其他两个， 这个应该是对蓝色通道应用了apply image之类的东西， 而亮调明显红色
接近255， 也是用了apply image, 全图的细节基本保留， 色调还保持正常， 所以大
概绿色通道保留没变
所以基于以上猜测
蓝色。。。apply image, using green channel, 原图对比减弱， 应该是用了invert
的green channel, 具体比例你自己看着半吧， 应该是亮度在中的某个模式
红色通道， 同样的命令， 也是reduce contrast, 所以这个时候应该是darken, 或者
对比模式的一种， invert green channel， 比例自选
分析特征后， 可以用通道混合器做最后的微调 |
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M****o
发帖数: 7045 | 5 原文 http://www.guardian.co.uk/football/blog/2011/jun/07/tactical-review-of-2010-11-season
日期 6月7日
媒体 卫报
作者 乔纳森•威尔森
译者注：false nine意谓回撤前锋。这类前锋活动范围经常在中前场，但经常回撤深至
中线，与10号并肩作战。在本文中，false nine就先暂且沿用英文原文，以待迪生。
标题：2010-2011赛季战术回顾
This was a season in which club football asserted its primacy, and the false
nine came from the periphery into the mainstream
这是一个俱乐部比赛大放异彩的赛季，滥觞已久的false nine逐渐汇入主流。
Barcelona's Lionel Messi wears No10 but has spearheaded the tactical vogue
for a false nine. Photograph: Da... 阅读全帖 |
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D***0
发帖数: 5214 | 7 Subaru全系应该用的是L型的MacPherson吧。不过据说STi搞了个什么inverted
MacPherson struts，如图。哪里inverted了？ |
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D***0
发帖数: 5214 | 8 Subaru全系应该用的是L型的MacPherson吧。不过据说STi搞了个什么inverted
MacPherson struts，如图。哪里inverted了？ |
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w*******y
发帖数: 60932 | 9 Link:
http://www.buy.com/prod/Ipowerpro-150w-Universal-Auto-Air-Adapter/q/loc/111/218202955.html
iPowerPro 150 Watt Universal Dual Voltage Auto / Airplane Adapter / Inverter
! Portable, compact dual voltage (100-120 VAC & 200-240 VAC) 150 Watt DC/AC
universal power inverter for notebook computers, pwersonal DVD players, and
other portable electronics. Specifications: Input Voltage Range: 11 ~ 15VDC.
Output Voltage & Frequency: US Receptacle 100 - 120 VAC 60Hz, Universal
Receptacle: 200 - 240 VAC... 阅读全帖 |
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w*******y
发帖数: 60932 | 10 Saw this on fatwallet! Hope I am not reposting
www.buydig.com:
http://www.buydig.com
has the iGo Pico Multi Media Pocket Projector for $129.99 after coupon code.
Use code: PRESENTATION30
Doesnt look like it can be hooked up to an ipod/iphone, but still seems cool!
Cheapest price on amazon is $160
Description:
Share your video instantly and on the go with the smallest, lightest and
brightest projector on the market. Designed for Flip camcorders, this ultra
portable mini projector is battery-power... 阅读全帖 |
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w*******y
发帖数: 60932 | 11 Saw this on fatwallet! Hope I am not reposting
www.buydig.com:
http://www.buydig.com
has the iGo Pico Multi Media Pocket Projector for $129.99 after coupon code.
Use code: PRESENTATION30
Doesnt look like it can be hooked up to an ipod/iphone, but still seems cool!
www.buydig.com:
http://www.buydig.com
Cheapest price on amazon is $160
Description:
Share your video instantly and on the go with the smallest, lightest and
brightest projector on the market. Designed for Flip camcorders, this ultra
po... 阅读全帖 |
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E**O
发帖数: 1980 | 12 mmz贴得是关于LED方面的产品，我贴的是被大多数人忽略的Slicon Carbide (SiC)
Diode。再贴一篇：
SiC Schottky diode demand takes off in 2009
Wednesday, April 28, 2010
By Gina Roos
imsresearchlogoWellingborough, U.K. — The silicon carbide (SiC) Schottky
diode market grew 25 percent in 2009, compared to the previous year,
reaching an estimated $29 million, reports IMS Research. Growth fell in line
with the total power semiconductor market during the downturn, but
experienced strong demand in the second half of 2009, according to th... 阅读全帖 |
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X*****s
发帖数: 2767 | 13 礼拜5 Dow是Inverted Hammer Candlestick，一般来说连跌后出现这个标志是趋势反转
的迹象。但成交量不足是个额外因素，7月7号也出现过Inverted Hammer Candlestick
，后面经过几天consilidation之后开始一波涨势。下个礼拜有一连窜的经济数据出来
，还有欧洲的新闻搅和，看哪一方占优势了。如果意大利国债一直在7%之上，谁也救不
了。欧元兑美元1.32也完全可以破掉。
看德国人的意思，最后估计是宁可退出欧元区也不愿意做冤大头。 |
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X*****s
发帖数: 2767 | 14 礼拜5 Dow是Inverted Hammer Candlestick，一般来说连跌后出现这个标志是趋势反转
的迹象。但成交量不足是个额外因素，7月7号也出现过Inverted Hammer Candlestick
，后面经过几天consilidation之后开始一波涨势。下个礼拜有一连窜的经济数据出来
，还有欧洲的新闻搅和，看哪一方占优势了。如果意大利国债一直在7%之上，谁也救不
了。欧元兑美元1.32也完全可以破掉。
看德国人的意思，最后估计是宁可退出欧元区也不愿意做冤大头。 |
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p***e
发帖数: 472 | 15 来自主题: _PowerElectronics版 - 请问各位大侠 guess depends on your inverter's kW or MW rating. For >5MW inverters,
should be >97-98% |
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a********m
发帖数: 92 | 16 小弟八月份毕业，开始找工快两个月了。感觉indeed和linkedin上虽然opening不少，
但是对fresh而言还是很艰难。我相信只要能找到第一份工作，以后的路应该会越走越
宽。希望版上各位过来人能给点建议，或者分享一点求职信息，在下感激不尽。
背景：
主要做过一些强电方面的design 和 testing
ECE Master Power Electronics
Experienced in the fields of:
- DCDC DCAC converter/inverter
- Linear & switch mode voltage regulator
- Magnetic components design
- Power MOSFET gate drive design
- Power electronics circuit modeling and analysis
- Electric vehicle traction drive system
- Wide bandgap semiconductor device (GaN & SiC) evaluation... 阅读全帖 |
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m**x
发帖数: 8454 | 18 right click to open image with Paint, Ctrl+A to select all -> right click
and select "invert color" |
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c***s
发帖数: 70028 | 19 11月28日，长沙市长郡双语实验中学，翻转课堂公开课上学生人手一台平板电脑。
老师先把上课内容录成视频，学生通过平板电脑看视频预习，上课时再进行难点学习。11月28日，湖南省教育学会初中校长工作研究分会年会暨翻转课堂观摩研讨会在长郡双语实验中学举行，学生人手一台平板电脑的公开课引起了来自全省1000多名老师的好奇与关注。
长郡双语实验中学1401班第一堂是数学课，同学们都熟练地拿出平板电脑，上课前他们已经通过老师的教学视频了解了这堂课的内容。老师的授课更加轻松，老师根据同学课前做题的情况，深度解释了一些易错的难点，再通过网络系统布置新的习题，同学们现场答题也即时传送到了老师电脑上。
长郡双语实验中学办公室主任胡承志介绍，从去年起学校就开始准备进行翻转课堂的实验。今年9月新生入学，学校决定在平行班中选择1401、1402两个班开展翻转课堂。学校召开两个班的家长会，跟家长们解释了翻转课堂，家长都很支持，当天为学生配齐了平板电脑。
“确实对老师的要求更高了，前期准备视频不能超过10分钟，要求我们的内容和语言都非常精准。”该校初一年级组数学老师任彦宾说，“学生学起来很嗨，毕竟是非常新颖的方式。... 阅读全帖 |
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w****j
发帖数: 5581 | 20 这个类比不完全恰当，中国印度隔着喜马拉雅山呢，画佛像，画师也只能按中国人形象
来了。罗马人对努米底亚人还是很熟悉的。硬币头像做旁证也是没办法，实在是流传下
来的东西太少了。连硬币本身的信息，比如何时铸造，流通地区也都缺乏啊。
语言学方面，我不熟悉，向你老兄学习了。
另外，我查过了老Pliny的Natural History，里面对Numidia人也是语焉不详。我查到
Dictionary of Greek and Roman Geography里面提到，Numidia各部落的特征不尽相同
。有白人（whites)也有肤色较深的人（blacks but not negroes).这个好像有近代考
古支持，但原始文献没找到。
Sallust关于Numidia人来源的说法抄写如下。他的来源是译自Hiempsal II用布匿语写
的著作。而Hiempsal的来源恐怕就只能是口头传说了。
In the beginning Africa was inhabited by the Gaetulians and Libyans, rude
and uncivilized folk, who fed l... 阅读全帖 |
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d**********2
发帖数: 684 | 21 aglee.
chen is a fragile invert lady who grew up with a divorced single mother.
it is understandable that she felt to be utilized and was so desparate and
sensitive to commit the crime. |
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v****o
发帖数: 978 | 22 Chinese economic reform and development: achievements, emerging challenges
and unfinished tasks
Jane Golley and Ligang Song
The economic transformation that has taken place in China since the late
1970s is now regarded as one of the most significant social changes in human
history. Within just three decades, China has succeeded in transforming
itself from a centrally-planned closed economy into one of the world’s most
dynamic and globally-integrated market economies. The dynamics unleashed by
De... 阅读全帖 |
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l**i
发帖数: 8144 | 23 简单地讲 就是谋事在人 成事在天
认为社会发展沿着某个预定方向发展的理论 都是傻逼理论
--------------------------------------
Anthropic principle
From Wikipedia, the free encyclopedia
In astrophysics and cosmology, the anthropic principle is the philosophical
argument that observations of the physical Universe must be compatible with
the conscious life that observes it. Some proponents of the argument reason
that it explains why the Universe has the age and the fundamental physical
constants necessary to accommodate conscious life. As a ... 阅读全帖 |
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C****g
发帖数: 2220 | 24 Birth Year
1995
Home
San Jose, California
Birth Place
Fremont, California
http://www.teamusa.org/Athletes/HS/Ariel-Hsing.aspx
Height: 5' 5"
Weight: 115 lbs
Coach: Massimo Costantini, Dennis Davis, Stefan Feth, Zhenshi Li, Zhou Xin,
Hailong Shen, JianXu Liu, Meng Tian, and Dan Liu
Handed: Right
Grip: Shakehands
Style of Play: Two Wing Attacker
Rubber: Both sides inverted
Club Affiliation: ICC, New York Athletic Club, Palo Alto, World Champions
Table Tennis Academy
Competition Record:
2012 US Olym... 阅读全帖 |
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M****n
发帖数: 757 | 25 科普一下，主要是光伏发的电，直接并网，并入国家电网。因此跟你家空调和电暖气不
搭界的。
当然如果你自己愿意，也可以自己弄个converter系统，和蓄电方式，再弄个inverter
系统，才能带动家电的。 |
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C****g
发帖数: 2220 | 26 根据我的判断,herzog家的电脑inverted upside-down |
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d**********x
发帖数: 4083 | 27 Kidney damage is usually non-invertible... Love them and avoid toxics... |
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O*******d
发帖数: 20343 | 28 是用蛋蛋皮或JJ皮做的， 可以里边会有毛。 使用前，需要人工扩张一下。
A transsexual's neo-vagina will never look the same as a natal vagina. It
may look similar (depending on the surgeon's skill) but not the same. Yes,
there is diversity from natal vagina to vagina. But there are certain things
you will NEVER see in a real woman's mantrap!
1) Symmetrical scarring either side of the lips (Labia Majora). These scars
are always present as they represent the area from where the guy's balls
were torn out. Some trannies try to hide th... 阅读全帖 |
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k********k
发帖数: 5617 | 29 http://www.bbc.co.uk/news/magazine-22607506
22 May 2013 Last updated at 05:30 ET
Franglais row:
Is the English language conquering France?
By Agnes Poirier French journalist
The French parliament is debating a new road map for French universities,
which includes the proposal of allowing courses to be taught in English. For
some, this amounts to a betrayal of the national language and, more
specifically, of a particular way at looking at the world - for others it's
just accepting the inevitable.
... 阅读全帖 |
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a**********u
发帖数: 28450 | 30 From Phys review lett website:
It’s only three lines of simple math for a human, but a small victory for a
quantum computer. Researchers in China report in Physical Review Letters
that they can solve two linear equations by manipulating four entangled
photons. Their demonstration—the rough equivalent of solving for x and y
in the equations 4x+3y=6 and 3x+2y=3 —is the first proof that a quantum
algorithm proposed in 2009, which promised exponential speed-up compared to
one run on a normal CPU,... 阅读全帖 |
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s**********n
发帖数: 2343 | 31 Inverted yield curve. 殖利率反转。6~15月之后进入衰退。 |
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y*h
发帖数: 25423 | 32
backlight CCFL tube。这类机器一般背光损坏有两个可能，一是tube，一是inverter
，你这个现象基本是tube的问题。新笔记本背光是LED的，没有tube。 |
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s*****e
发帖数: 16824 | 34 hp的背光我也帮人修过，简直是操蛋啊。换了inverter以后没多久又坏了，他们的电路
肯定有问题。 |
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a***g
发帖数: 3377 | 37 这个垃圾校长不知道矫枉必须过正的简单道理么？
1. Du ZW, Gong K, Fu JS, Radiation from electromagnetic bandgap microstrip
structures
INTERNATIONAL JOURNAL OF INFRARED AND MILLIMETER WAVES 25 (11): 1669-1675
NOV 2004.
2. Du ZW, Gong K, Fu JS, et al., A compact planar inverted-F antenna with a
PBG-type ground plane for mobile communications, IEEE TRANSACTIONS ON
VEHICULAR TECHNOLOGY 52 (3): 483-489 MAY 2003.
3. Wang BQ, Gong K, Yang D, et al., Fine attitude control by reaction wheels
using variable-structure controller, ... 阅读全帖 |
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z****e
发帖数: 54598 | 40
用python的话，你自己试试就知道了
做一个简单的invert index table
你妹，才几百m的文件，给我算了二十分钟
我用java，4秒完成，这才多大
以后java的script engine部分完善之后
直接在distributed file system上制造r engine不是不可能
其实现在已经有几个projects在做了
python其实也是一个脚本，当然python自身是否认的
但是python具有很多脚本的特质，比如动态类型
比如解释执行，大多数人还是把python当脚本用
而且python的thread部分非常弱
如果想在将来分布式上有所作为
一个thread，一个网络，这两个部分都不能太弱
c和cpp写一个tcp socket让人想屎的冲动都有
你可以面试时候找个人试试，给他半个小时，看丫能不能写完一个tcp socket的例子
还不出错，脚本则是thread普遍不行，很多脚本根本没有thread的概念，比如js
python的thread也不行，还有就是脚本的动态类型基本上都是可以让人想屎的东西
机器看起来吃力，一旦量大了，人看起来也很痛苦
c++和p... 阅读全帖 |
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c*****e
发帖数: 3226 | 41 也有人说了一段很有意思的话：
The west's critical flaw is that it believes its own propaganda.
The "Washington Consensus" believed that no country could develop or resist
the temptations of the "superior" culture and understanding of the western
financial system and industry. That the countries that they were moving into
were hopeless without their intelligence and guidance and would quickly
fall in line and become dependent and helpless without their western
overlords. They believed that they would always hav... 阅读全帖 |
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t******l
发帖数: 10908 | 42 你肯定买的是那种赤果果仿真型的。。。你买的那种下里巴人货，毫无艺术雕塑美感也
就算了。。。关键是曲面形状的二阶偏导数的 computational condition 太差。。。
这曲面既不能写成 closed form expression，用 Newton Solver 还不太容易 invert
Hessian Matrix。。。总之就是毫无数学美，没情趣是真的。。。
：哪儿啊，那会还没淘宝什么事呢 |
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t******l
发帖数: 10908 | 43 数字卷积器啊，不是线性函数叠加？为啥不能 invert 矩阵？
: 你妈的，你真是数学系毕业的？
: 卷积是线性方程了？？？
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S*****n
发帖数: 4185 | 44 Just as some have speculated that the experience of slavery lingers in the
psyche of the descendants of slaves, the Irish Famine, the result of the
British genocidal policy against the Irish, has affected the generations of
the Irish that followed, and Jews are suffering from post-traumatic stress
as a result of the Holocaust. Dissolving into Whiteness has provided both
with an escape chute. It was when James Baldwin wrote in Dan Watt’s The
Liberator that Jews had become White Christians that h... 阅读全帖 |
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n******g
发帖数: 17225 | 45 估值和融资轮数是个inverted-U shaped的关系 |
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y*j
发帖数: 3139 | 46 你这个honda的 inverter generator 多少钱在哪里买的?
最好4000瓦比较放心。不过美国停电很少，2000瓦也可以凑合。
: 我买的就是。上次costco有比2000W更大一点的的三星牌的逆变型的卖，
忘了是
2200W还
: 是2500W，才600多还是700块，很值，可是我已经有了宏大的2000W了。逆
变型的
省油。
: 要注意的是WIFI那些东西需要个不间断电源，否则暖气启动时候会瞬时电
压过低
断网。
: 唯一不方便是用微波炉的时候要断开暖气和冰箱。如果有2500W或者3000W
我想这
些就不
: 需要了。省油的目的不是省钱，而是如果断个长时间的，不需要老是跑去
加油站
买油。
|
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发帖数: 1 | 47 10Y TSY 2.85
2Y TSY 2.60
spread: 25 bps. |
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s*****n
发帖数: 1998 | 49 老将不怕， 在怎么经济危机， 洋爹也得吃饭拉屎， 老将们填饱肚子不成问题 |
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t******o
发帖数: 3223 | 50 可能还有两年才能来经济下滑
吗的人关键是联储觉得自己是神，散步这次不一样论。当年貌似格林斯潘也说经济不一
样，各个都觉得自己这茬不一样 |
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