h********e
发帖数: 4 | 1 Can anybody tell me a fast and robust algorithm to determine whether a
vector point x is inside a cone formed by a set of vector points {x1, x2, ..
., xn}? x1, x2, ..., xn can be linear dependent. Cone is the linear
summation of {x1, x2, ..., xn} with non-negative coefficients.
A similar question is how to determine whether x is inside the convex hull
formed by {x1, x2, ..., xn}.
Thank you. |
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h********e
发帖数: 4 | 2 Can anybody tell me a fast and robust algorithm to determine whether a
vector point x is inside a cone formed by a set of vector points {x1, x2, ..
., xn}? x1, x2, ..., xn can be linear dependent. Cone is the linear
summation of {x1, x2, ..., xn} with non-negative coefficients.
A similar question is how to determine whether x is inside the convex hull
formed by {x1, x2, ..., xn}.
Thank you. |
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H*****s
发帖数: 32 | 3 Is the length of b & c fixed? Otherwise, the whole space, a cone, or a
larger cone minus a smaller one. |
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n*******l
发帖数: 2911 | 6 The line is determined by the point that is farther away from
the origin.
Let P, Q be two points forming a sharp angle. Let r1=|OP|
and r2=|OQ| and r1<=r2. Let L1 be a line inside the cone
POQ. Then the sum of distances from P, Q to L1 is
r1*sin(a) +r2*sin(b) >=r1*sin(a) +r1*sin(b)
>= r1*sin(a+b)= distance from P to line OQ.
For any lines L outside of the cone POQ, the sum of
distances from P and Q to L is bigger than r1*sin(a+b).
The slightly nontrivial case is a line L2 as shown in the
graph. ... 阅读全帖 |
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h***r
发帖数: 206 | 7 延续小马哥的match互助组的风格。大家可以看到我们组里的成员好多都有同一个pg的
IV，但是我们都能做到share我们的面经，毫无保留（每个人面试的时间都不同，
chances可能遇到同一个面试官，被问到同样的面试题的机会太小了，绝对不会因为同
一个pg的IV就会存在那么大的竞争关系，最关键是你的面试时的表现！！）。一定建一
个好的组，和志同道合，性格相投的人在一起，多练。这是我们组成功的关键！下面是
我们组的所有match上的人IV lists：
最后祝福所有match上的同学们！2013即将拉开序幕，大家继续+U！！
组员1：all IM:
Greater Baltimore Medical Center Program， MD
Kingsbrook Jewish Medical Center Program，NY
Moses H Cone Memorial Hospital Program，NC
New York Downtown Hospital Program，NY
New York Medical College (Richmond) Program, NY
组员2：
I... 阅读全帖 |
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h***r
发帖数: 206 | 8 延续小马哥的match互助组的风格。大家可以看到我们组里的成员好多都有同一个pg的
IV，但是我们都能做到share我们的面经，毫无保留（每个人面试的时间都不同，
chances可能遇到同一个面试官，被问到同样的面试题的机会太小了，绝对不会因为同
一个pg的IV就会存在那么大的竞争关系，最关键是你的面试时的表现！！）。一定建一
个好的组，和志同道合，性格相投的人在一起，多练。这是我们组成功的关键！下面是
我们组的所有match上的人IV lists：
最后祝福所有match上的同学们！2013即将拉开序幕，大家继续+U！！
组员1：all IM:
Greater Baltimore Medical Center Program， MD
Kingsbrook Jewish Medical Center Program，NY
Moses H Cone Memorial Hospital Program，NC
New York Downtown Hospital Program，NY
New York Medical College (Richmond) Program, NY
组员2：
I... 阅读全帖 |
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b***y
发帖数: 14281 | 9 不是massless electron。是说因为其费米面呈现锥形，类似Minkovski space
里的light cone，所以这个系统里的fermionic excitation appears like a
single massless Dirac fermion. But, No. 1, it's not really "massless"
because the so called "mass" here is an analogous concept since
the fermi surface is of course not the real light cone and its slope
is not the real speed of light, and No. 2 it's an approximation. Of
course no exact conic fermi surface is possible in a real physical
system. It always gets smoothed out at the tips.
.. |
|
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c*w
发帖数: 4736 | 11 I perfectly agree with you that the walls may not be
independent, and therefore the area of each cone are
dependent of eachother. However, the expected value
of the area of each cone must be the same, because
the area is determined by their vertices only, which
follow the same distribution.
And with basic knowledge of probability, we know that
E(a1 + a2 + ..... + am) = E(a1) +E(a2) + ... E(am)
(however dependent a1....am are!!!!).
However, a1 + ... + am = whole area of the sphere,
and plus that |
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y*c
发帖数: 247 | 12 cone beam CT我们学校一般orthodontics department用的比较多，但好像也是
research为主。另外就是place implant的时候会建议cone beam CT来evaluate height
and width of bone。 |
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n***w
发帖数: 2405 | 13 猫头鹰这种夜行动物没有cones吧，所以没有三元色彩喽。只要有cone的基本都能感知
颜色。
看看jeremy nathans的讲座吧。不知道jeremy nathans的可以google去。。
http://mitworld.mit.edu/video/669
the evolution of trichromatic color vision |
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x*****n
发帖数: 3422 | 14 传说中的狗屎运 ：）
去年老爷爷的GT3 RS，把一个cone撞飞起来，前空翻转体720，又直落在box里。大家一
致决定不算cone。 |
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h****y
发帖数: 9234 | 15 今天有几个开的猛的,把cone一直拖在一底下拖到退场,然后工作人员去从他车底下给拔
出来的...
还有把finish的那个大cone撞飞什么的...各种
是不是他们都喜欢在结束之搞个s型的桩来穿. |
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w*******y
发帖数: 60932 | 16 The Panasonic SC-HTB10 2.1-Channel Slim Sound Bar System with 3D Pass
Through lets you easily pass 3D audio and video signals through your home
theater system. The advanced bamboo cone speaker lets you enjoy detailed,
clear vocals in your music and movies. Enjoy rich, low bass with the
integrated subwoofer.
Panasonic SC-HTB10 2.1-Channel Slim Sound Bar System with 3D Pass Through:
* Total Power: 120W
* 2.1-channel sound system
* Full HD 3D compatible
* 1080p playback with x.v.Col... 阅读全帖 |
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w*******y
发帖数: 60932 | 17 The Panasonic SC-HTB10 2.1-Channel Slim Sound Bar System with 3D Pass
Through lets you easily pass 3D audio and video signals through your home
theater system. The advanced bamboo cone speaker lets you enjoy detailed,
clear vocals in your music and movies. Enjoy rich, low bass with the
integrated subwoofer.
Panasonic SC-HTB10 2.1-Channel Slim Sound Bar System with 3D Pass Through:
* Total Power: 120W
* 2.1-channel sound system
* Full HD 3D compatible
* 1080p playback with x.v.Col... 阅读全帖 |
|
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w*******y
发帖数: 60932 | 19 MartinLogan ESL Series Purity DarkCherry Fully Powered Hybrid Electrostatic
Loudspeaker Each:
http://www.newegg.com/Product/Product.aspx?Item=N82E16882981016
$200 off w/ promo code EMCKCJE74, ends 7/17
Model
Brand
MartinLogan
Series
ESL Series
Model
Purity DarkCherry
Spec
Type
Floorstanding Speakers
Sold As
Each
Driver Units
High Frequency Transducer: XStat CLS electrostatic transducer
- Panel Dimensions: 28" 8.6" (71.1 21.8cm)
- Radiating Area: 241 in2 (1,550 cm2... 阅读全帖 |
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w*******y
发帖数: 60932 | 20 Manufacturer's Description for M-Audio BX8A Active Monitor
M Audio BX8a studio monitors refine their earlier highly acclaimed near-
field reference monitors, renowned for packing a lot of punch for their size
. Their new low-frequency driver cones are crafted from Kevlar, typically
found in much more expensive monitors. Curved cone design coupled with high-
temperature voice coils and damped rubber surrounds deliver incredible
fidelity and durability. The 1 in. high-frequency drivers' magnetical... 阅读全帖 |
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w*******y
发帖数: 60932 | 21 Use promo code EMCJHHC73
Link:
http://www.newegg.com/Product/Product.aspx?Item=N82E16882269027
Goes great with the Yamaha 5.1 sale also going on at Newegg: http:// />
RC-Micro is Energy's most compact collection of high-tech components--
satelli tes and center channel. Though small, this system packs a big
wallop inside their great looking high-gloss black cabinets.
This system delivers lifelike performance from your favorite games and
movies, with their screaming aluminum cone tweeters to the ... 阅读全帖 |
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w*******y
发帖数: 60932 | 22 These are a great price!
4-inch (100mm) two-way bookshelf loudspeaker
Powerful, accurate and styled to make a dramatic design statement in any
listening environment, compact Studio 130 loudspeakers bring legendary JBL
sound to bookshelves, tabletops and other convenient, space-saving places.
With woofers featuring high-output PolyPlas(TM) cones, and CMMDLite
tweeter domes with proprietary Bi-Radialwaveguides, Studio 130 systems
offer exceptional clarity and realism with outstanding bass response... 阅读全帖 |
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c*****e
发帖数: 94 | 23 I can't say I like him a lot, but some of his works
are quite touching. you know what, the cone collection of
Baltimore Museum of Art has 500 works by Matisse.
hehe, the Cone sisters, after whom the collection is named,
must have been quite into Matisse. |
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h*h
发帖数: 27852 | 24 如果现在是冰河期的话，地球能支持多少人？
30亿？40亿死掉？
20亿？50亿死掉？
Next Ice Age Delayed by Global Warming, Study SaysChristine Dell'Amore
National Geographic News
September 3, 2009
Humans are putting the brakes on the next ice age, according to the most
extensive study to date on Arctic climate change.
The Arctic may be warmer than it's been in the past 2,000 years—a trend
that is reversing a natural cooling cycle dictated by a wobble in Earth's
axis.
Previously, researchers had looked at Arctic temperature data that w... 阅读全帖 |
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c***s
发帖数: 70028 | 25 美国得州军事基地枪击案死亡人数升至13人
据美联社消息，美国德州胡德堡于当地时间本周四发生枪击案，一名士兵手持两把手枪向别人射击，造成12人丧生，至少31人受伤。袭击者是一名马上要派往海外的精神病医生。
该枪击发生在美国5日下午1点30分，所有的伤亡事故都发生在该基地的士兵准备中心(Soldier Readiness Center)。美国总统奥巴马迅速接获这次事件的报告，随后表示这是场“令人震惊的突发暴力事件”。美国德州胡德堡陆军基地的指挥官康恩中将(Bob Cone)：“这是一个可怕的悲剧，让我们所有的人都感到十分震惊。”
被击毙的枪手哈桑是现年39岁，来自弗吉尼亚，在被转送到德克萨斯州之前曾在美里德陆军医院(Walter Reed Army Medical Center)工作6年。于1997年获得弗吉尼亚理工大学生物化学学士学位。此后在2001年获得美国军队卫生服务大学(Uniformed Services University of the Health Sciences)医学学位。目前是单身，也没有小孩。目前对于哈桑是否负责该基地相关人员的治疗尚不清楚。美方官员在调查了哈森在里 |
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s******g
发帖数: 79 | 26 谁能解释一下这个理论究竟是干什么的？BiSb和什么Dirac Cone不是最近几年提出的拓
扑绝缘体研究的东西吗？怎么突然变成好像他们最先发现一样。另外文章4月份发表，
怎么这么快就以两人名字命名了？ |
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c***s
发帖数: 70028 | 27 据美国《世界日报》报道，该报26日报导一位洛杉矶蒙特利公园市华人因英文发音不准，将“我要sue(告)你”，说成“我要shoot(射死)你”，惊动邻居慌忙报警的乌龙事件，引起网友广泛热议。大家纷纷贡献自己因发音不标准而闹笑话的趣事自嘲。
网友Annie说，因为单词beach(海滩)的发音与骂人词bitch(婊子)只有微小区别，曾听说过一位华人在派对上点鸡尾酒Sunshine on the beach(阳光海岸)，竟一时失礼说成Son of a bitch(狗娘养的)，当时全场都为之惊倒。
许多新移民初来美国时，都有在外面点餐吃喝，因英文发音不标准而被人误会的经历。有网友提到，曾在便利店买瓶Coke (可乐)，脱口而出竟然说成Cock(男性生殖器)。与营业员面面相觑时，尴尬得想掉头就走。
网友美国客回忆自己刚来美国时，去麦当劳买Cone(甜筒冰淇淋)，说成了Corn(玉米)，被店员嘲笑Are you chicken(你是小鸡吗)?经人指点，他才明白这位老美的意思是，小鸡是吃玉米的。
Dorolalala说，自己与房东讨论熬夜秘诀时，他说常吃Snack(零食)让他保持头脑清醒、精神集中，不料... 阅读全帖 |
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h*h
发帖数: 27852 | 28 【 以下文字转载自 ChinaNews 讨论区 】
发信人: hsh (三胡), 信区: ChinaNews
标 题: 气温变暖也许是好事？
发信站: BBS 未名空间站 (Wed Nov 9 14:33:32 2011, 美东)
如果现在是冰河期的话，地球能支持多少人？
30亿？40亿死掉？
20亿？50亿死掉？
Next Ice Age Delayed by Global Warming, Study SaysChristine Dell'Amore
National Geographic News
September 3, 2009
Humans are putting the brakes on the next ice age, according to the most
extensive study to date on Arctic climate change.
The Arctic may be warmer than it's been in the past 2,000 years—a trend
that is reversing a natural co... 阅读全帖 |
|
y***k
发帖数: 9459 | 29 【 以下文字转载自 Military 讨论区 】
发信人: yesok (ok博士), 信区: Military
标 题: 上一代人类已经掌握了反重力和星际航行的能力
发信站: BBS 未名空间站 (Wed Mar 30 23:44:53 2016, 美东)
反引力手册摘录
By D. Hatcher Childress
Many researchers into the UFO enigma tend to overlook a very important fact.
While it assumed that most
flying saucers are of alien, or perhaps Governmental Military origin,
another possible origin of UFOs is ancient
India and Atlantis.
许多研究员进入不明飞行物谜之内容易看出一个很重要的事实。虽然多数被假定是外星
人的飞碟，或也许
是政府的军事来源，不明飞行物的另外一个可能的来源是古印度和亚特兰提斯岛。
What we know ab... 阅读全帖 |
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f*****Q
发帖数: 1912 | 30 姐不是18摸？只是出了个cone而已，不象破音障。如果破音障当时在场的小朋友们的耳
孔会出血的。 |
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s****i
发帖数: 2993 | 31 Vapor cone has nothing to do with breaking sound barrier. Slow jumbo jets in
humid days often have them. |
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t***h
发帖数: 5601 | 32 http://www.spacenews.com/launch/110301-nasas-glory-satellite-lo
Rocket Fairing Glitch Dooms NASA's Glory Mission
WASHINGTON -- NASA's $424 million Glory climate observation satellite was
lost in a March 4 launch attempt from Vandenberg Air Force Base, Calif.,
after the shroud designed to protect the spacecraft during its climb to
orbit atop a Taurus XL rocket failed to separate, agency officials said.
The Taurus XL, built by Orbital Sciences Corp. of Dulles, Va., was making
its return to flight ... 阅读全帖 |
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r****t
发帖数: 10904 | 33 Or better, use a pole to mimic the flag pole...
the
cone
|
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h*h
发帖数: 27852 | 34 【 以下文字转载自 ChinaNews 讨论区 】
发信人: hsh (三胡), 信区: ChinaNews
标 题: 气温变暖也许是好事？
发信站: BBS 未名空间站 (Wed Nov 9 14:33:32 2011, 美东)
如果现在是冰河期的话，地球能支持多少人？
30亿？40亿死掉？
20亿？50亿死掉？
Next Ice Age Delayed by Global Warming, Study SaysChristine Dell'Amore
National Geographic News
September 3, 2009
Humans are putting the brakes on the next ice age, according to the most
extensive study to date on Arctic climate change.
The Arctic may be warmer than it's been in the past 2,000 years—a trend
that is reversing a natural co... 阅读全帖 |
|
j****c
发帖数: 19908 | 35 light cone?
这个得结合闵科夫斯基度规才行，没数学物理公式光有文字是不行的 |
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d*b
发帖数: 21830 | 36 用Cone beam CT做3D implant plan的NobelSmile，所有的implant都要从欧洲空运过来
的，每一个implant都是personalized的，你的问题很可能是plan做错了 |
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d*b
发帖数: 21830 | 37 你要了解美国医疗体系的话就不会说这种话了，noblesmile不可能单卖给你implant,人
卖的是system,implant寄来的东西是一个kit,牙医连自己消毒都不用，拆开里面啥工具
，包括镊子剪刀啥的都带了，都是一次性的，dental CT是cone beam CT,本来就是环形
的很小的玩意。
你现在可以request你的病历，找正经的牙医做评估。
130 |
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l****u
发帖数: 3130 | 38 这个市印度老将巴
PoorChildOFIndia (New Delhi,india)
Europe ?The missile never left India , it fell in my slum near shadipur bus
depot, new delhi . We have used the material to construct a roof for my
jhopdi. The cone of the missile is being used as a makeshift toilet for many
families here. thank you DRDO for putting roof over our heads and giving us
a toilet. Next time pls use some food , fruits and vegetables as a payload. |
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p**i
发帖数: 144 | 39 和美国的高速相比，感觉国内的高速有几个不合理的地方，一个是并进和分出的ramp特
别短，很多时候我从休息站出来，只有几十米的ramp，而且国内的车普遍排量小，小马
拉大车，还没提上速度，就要并道了；而是只在路的最右面有紧急停车道，而且在行车
道和紧急车道之间没有这面的一排小坑，可以提醒司机偏离行车道了；三是休息站修的
一个烂，整个就是一个大广场一样，大车小车乱停一气；四是在维修路段，经常是离修
路的地方还有二十米的地方突然摆了一排traffic cones，也没有闪灯，有的人就直接
撞上去了；五是路上全是抓超速的摄像头，很多车把车牌子遮了起来狂超速却没人抓。 |
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y*h
发帖数: 25423 | 41 美帝范儿已经模仿得很象了，服装手势都像模像样，比苏联的老土强多了。但是细节还
差点意思，比如人员的体型还不够硕大，要200磅以上才够范儿。还有下面这个栏杆，
最好还是换成红色或黄色的cone，这种价格比塑料高得多的不锈钢的栏杆看起来很排场
，但是一般是展览会和领导参观之类的场合比较合适： |
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d*b
发帖数: 21830 | 42 男护士有点脑残了，现在海关，机场的那些x-ray机器，很多是cone beam CT, 带图像
auto registration的，是跟金属管子又怎么了？人都计算机自动识别了 |
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u***r
发帖数: 4825 | 43 http://online.wsj.com/news/articles/SB1000142405270230373080457
One person died and at least 17 were injured when a five-story residential
building in Manhattan's East Harlem neighborhood exploded and was leveled
Wednesday morning, a law-enforcement official said.
Witnesses said they heard a loud boom near East 116th St. and Park Avenue.
The fire department received the initial call at 9:31 a.m. and were on the
scene at 1644 Park Avenue two minutes later.
It is a five-alarm fire—44 units and 200... 阅读全帖 |
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T**********e
发帖数: 29576 | 44 说的不错，看来只要不是舔巴马的话题Bill Maher也能说点人话。
巴马为Sterling的私房话发表声明谴责真是非不分，挖思想根挖到人家里来了。
Maher: "Who Wants To Live In A World Where The Only Right To Privacy Is In
Your Head?"
BILL MAHER: Now that Americans are getting wise to the dangers of being
spied on by the government, they have to start getting more alarmed about
spying on each other. Because at the Donald Sterling mess proved anything it
’s that there’s a force out there just as powerful as Big Brother -- Big
Girlfriend.
Last week, when President Obam... 阅读全帖 |
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g*********e
发帖数: 14401 | 45
我每天晚上就靠想象着人类殖民火星后的景象入眠
首先要解决能源问题，这个在火星上造几个核电站应该可以搞定；
其次是选择殖民地点，鉴于火星比较寒冷，选择在赤道附近为佳；
然后是居住环境，可以建立全封闭的大型玻璃状cone形屋顶，在里面制造氧气。氧可以
由火星的冰冻层获得，水也主要由冰冻获得；
居住地周围区域及天空布上sensor network，及时感知温度气压等剧烈变化及灾难到临；
还有一个重要问题，就是要解决太阳辐射，这个可以在玻璃屋顶上方建立磁场阵列，
deviate辐射；
初期，人类的食物来自用火星土栽培的植物，植物经过基因改造能适应缺水，低温强辐
射的环境；
等发展起来以后就可以Import动物，产生肉类给火星人吃；
人的居住地应当往地下发展，一者防辐射，而来保温；
远期目标，逐步在大气中注入制造气体，使得火星大气渐渐浓稠，形成保护层；
主要的难点就是水源的获得。没有足够氧和氢，很难产生水源。其他都doable。 |
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n**s
发帖数: 2230 | 46 http://en.wikipedia.org/wiki/Category:American_emigrants_to_Can
A
Sayyd Abdul Al-Khabyyr
Diane Ablonczy
Roy Adams
Richard Adu-Bobie
Cindy Ady
Alexander Aitchison
John Allan (colonel)
David Alward
Melissa Sue Anderson
Nima Arkani-Hamed
George Atkins (broadcaster)
Norman Atkins
B
Nat Bailey
Emery Barnes
Andy Barrie
Earl W. Bascom
Ben Bass (actor)
Bill Bauer (poet)
David Bednar
Brendan Beiser
Vince Beiser
Elisha... 阅读全帖 |
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s**********s
发帖数: 1079 | 47 但是这不代表每个人的感受是一样的，因为颜色感除了温暖和寒冷还有它本身的独立感
受。
这感受每个人是否相同不好定义。有实验给老鼠眼睛细胞注射了病毒，表达了新的颜色
过滤，相当于多了一种cone，结果管辨别颜色的脑细胞就重组了，并且老鼠可以辨别更
多颜色。说明哪些脑细胞感应什么波长不是固定的，而是后天根据刺激产生的。有些关
键特征大家的感受应该是一样的，但是你的色感和别人的色感就没有必要相同。也就是
说长波的红感可能在别人那里是一种蓝色感，但是别人把蓝色感和长波温暖联系起来。
有些平面艺术家很可能是视觉细胞分配得比较合理，看世界更有内在规律。 |
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x********i
发帖数: 905 | 48 Intel STS 2015 Finalists
Anandapadmanaban, Eswar
Dr. Ronald E. McNair Academic High School, Jersey City, NJ
The ThereNIM: A Touch-less Respiratory Monitor
Ashkin, Emily Lorin
Providence Day School, Charlotte, NC
A Novel Synergistic Approach for Enhancing Immunotherapy in the Treatment of
Melanoma
Chemparathy, Augustine George
Dougherty Valley High School, San Ramon, CA
Accumulation of the Biodiesel Precursor Triacylglycerol Offsets Oxidative
Stress in the Model Alga Chlamydomonas reinhardtii
Cui... 阅读全帖 |
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J**S
发帖数: 2327 | 49 文学城转的，这是真的吗？ 有的太搞笑了。
1 Alabama 阿拉巴马州You may not have an ice cream cone in your back pocket
at any time. 任何时候都禁止将冰激凌筒放在裤子后面的口袋里。
2 Alaska 阿拉斯加州Moose may not be viewed from an airplane. 不许在飞机上看
麋鹿。
3 Arizona 亚利桑那州It is unlawful to refuse a person a glass of water. 拒绝
他人索取一杯水是非法的。
4 Arkansas阿肯色州Dogs may not bark after 6 PM. 下午6点以后狗不许叫。
5 California 加利福尼亚州Animals are banned from mating publicly within 1,
500 feet of a tavern, school, or place of worship。动物不许在酒馆、学校、宗
教设施附近1500英尺内交配。
6 Colorado 科罗拉多州T... 阅读全帖 |
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h***i
发帖数: 89031 | 50 你个穷光蛋在美国吃不惯coned beef，还要吃恶心的东方方便面 |
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