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全部话题 - 话题: stairs
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g*****9
发帖数: 4125
1
来自主题: WashingtonDC版 - 要DIY地毯了
If you plan to live in your house for long time, 100% wool carpet is the
best investment (last very long time and can be cleaned to like new shape
every time)
If you plan to move/sell or rent out, than go with kanga back carpet, no
need to buy padding, just lay it flat, no need to strech for normal size
rooms. I usually line up 2 sides first, put down staples as close to wall as
possible, trim the other two sides, put down more staples. (you can do it
by yourself in less than 20 mins for each ro... 阅读全帖
B******1
发帖数: 9094
2
The Creature
“Oh darn, I’m going to be later!” I thought while I hurried up the stairs
. I put down my backpack and noticed something. The classroom seemed to be
streaming light out of the window! Just as quickly as it had started, the
light coming from the window subsided. I quietly opened the door.
Strangely, nobody was inside except for something that was on my desk . . .
I looked at the thing more closely. It was green and had small, little
horns and tiny wings like a bat. It had a sh... 阅读全帖
A**d
发帖数: 13310
3
来自主题: Baseball版 - 为啥还不上楼梯代打?
他说stairs吧。我也觉得stairs比dobbs好。起码还能有个dobbs换feliz的后手
a**p
发帖数: 13
4
来自主题: Fitness版 - Wallclimb
If you can access to stairs, reverse climb of stairs will be much safer.
Because it is very easy to hurt your knee cap during coming-down phase of
reverse wallclimb.
s******5
发帖数: 478
5
我看版上人们成天介设想贼人入室都是这样的情景:你们全家在楼上,贼人闯入楼下,
然后你计划要:带头盔呀防弹衣呀,拿长枪啊短枪啊,几秒钟就要妥当呀,守住楼梯口
呀等等。
也有人设想自卫的情景是预知的,贼人出现之前你肯定有时间来准备枪,有时间上膛开
保险等等。
我觉得贼人可不听从你的设想,他会以一种最直接的方式出现,使你的种种假设的情景
准备彻底无用。
看这个例子,大白天,你坐在门口,通过透明的门你看见一个人过来敲门,你一开门就
是一把手枪顶住肚子。版上的高手谁能应付?
前几天有人说过室内佩枪,还真有这个需要的,而且枪要DAO,不要多余的上膛呀开保
险呀的动作,根本就没那时间。
真事:
http://host.madison.com/wsj/news/video/vmix_5eca1576-d1a6-11e0-
This story appeared first in the Sunday edition of the Wisconsin State
Journal newspaper.
Marv Kontney opened his front door. A man in jeans a... 阅读全帖
c*****c
发帖数: 564
6
When Kifer began walking down the stairs, he shot her and she fell down the
stairs.
He tried to shoot her again with his rifle, but the gun jammed and Kifer
laughed at him, the complaint noted.
Cousin刚被打死了,自己被枪打的从楼梯上掉下来,能笑的出来的人精神不是一般的强
,这些人都有精神问题,采取的行动都是对自己最不利的。
x********u
发帖数: 1485
7
来自主题: loseweight版 - 我来报个名吧 目标6月6日150磅
morning weight: 166 lbs (sad...haven't seen any big change for 3 days
leh)
breakfast: 1/2 cup oatmeal
10 flights of stairs walking in the morning
lunch: 1 nancy's quinche 400 cal
20 flights of stairs walking in the afternoon
dinner: 1/4 cup brown rice + 2 cup 盐水生菜+白萝卜 + 4颗大虾(真的很大的那种)
还喝了一碗菜心豆腐汤,晚饭基本无油
每日哄女儿routine结束后,wii fit 30 mins
yeah!
x********u
发帖数: 1485
8
来自主题: loseweight版 - 我来报个名吧 目标6月6日150磅
kaka...
back back
3/8 Morning weight 164 lbs
breakfast.... a hard boiled egg + a cup of metamucil
10 flights of stairs
lunch ..... hot roast beef with provolone cheese on wheat bread + a tiny pack of potato chips...//cry
10 flights of stairs
dinner.... 盐水菜心一小盘 + 几片番茄炒冬瓜+1块清蒸排骨
今天感觉很累,晚上去costco买完菜回来不想锻炼了。
C**C
发帖数: 1553
9
来自主题: loseweight版 - 健康减肥123...
03/06
Breakfast: one boiled egg + 2 slice of whole wheat bread + 1 small chocolate
- 250
Lunch: 1 cup of rice + stir-fried veggies + fish meat - 600
Dinner: fish meat + 3 small brownies + stir-fried veggies + several sesame
cookies - 800
Total: 1650
Exercise: climbed stairs
Plus: start climbing stairs
Delta: eat chocolate and brownies because they are free. wrong selection
C**C
发帖数: 1553
10
来自主题: loseweight版 - 健康减肥123...
03/06
Breakfast: one boiled egg + 2 slice of whole wheat bread + 1 small chocolate
- 250
Lunch: 1 cup of rice + stir-fried veggies + fish meat - 600
Dinner: fish meat + 3 small brownies + stir-fried veggies + several sesame
cookies - 800
Total: 1650
Exercise: climbed stairs
Plus: start climbing stairs
Delta: eat chocolate and brownies because they are free. wrong selection
g*2
发帖数: 658
11
来自主题: Running版 - 跑步伤病防治的一些见解
补充几个:
1) Chondromalacia patella (髌软骨软化征) is a common cause of kneecap
pain or anterior knee pain. Often called "Runner's Knee," --Allowing the
inflammation of chondromalacia to settle is the first step of treatment.
Avoiding painful activities that irritate the knee for several weeks,
followed by a gradual return to activity is important. In this time, cross-
training activities, such as swimming, can allow an athlete to maintain
their fitness while resting the knee. The next step in treatment i... 阅读全帖
g*2
发帖数: 658
12
来自主题: Running版 - 跑步伤病防治的一些见解
补充几个:
1) Chondromalacia patella (髌软骨软化征) is a common cause of kneecap
pain or anterior knee pain. Often called "Runner's Knee," --Allowing the
inflammation of chondromalacia to settle is the first step of treatment.
Avoiding painful activities that irritate the knee for several weeks,
followed by a gradual return to activity is important. In this time, cross-
training activities, such as swimming, can allow an athlete to maintain
their fitness while resting the knee. The next step in treatment i... 阅读全帖
w****1
发帖数: 4931
13
not all shin splints are the same. my shin is completely fine walking up
hills or up the stairs. it only hurts from
going downhill or down stairs. the worst kind of shin splints comes with "
echoing" pain, that is when the
injured leg bears weight and then relaxes, the pain stays for the next few
seconds. Now my "echo" is mostly
gone, which indicates that my shin is recovering.

recovery
g*2
发帖数: 658
14
http://www.mitbbs.com/article0/Running/31402813_0.html
#2 on the list
2)Patellofemoral pain syndrome is pain in the front of the knee (其实主要
在膝盖和股骨交界的地方,如名).The main symptom of patellofemoral pain
syndrome is knee pain, especially when sitting with bent knees, squatting,
jumping, or using the stairs (especially going down stairs).Patellofemoral
pain syndrome can be relieved by avoiding activities that make symptoms
worse. methods to relieve pain include:
Taking nonprescription NSAIDs, such as ibu... 阅读全帖
t*********t
发帖数: 4766
15
来自主题: Running版 - 新手问个膝盖疼问题
Yes, going downstairs:
http://www.mitbbs.com/article0/Running/31402813_0.html
#2 on the list
2)Patellofemoral pain syndrome is pain in the front of the knee (其实主要
在膝盖和股骨交界的地方,如名).The main symptom of patellofemoral pain
syndrome is knee pain, especially when sitting with bent knees, squatting,
jumping, or using the stairs (especially going down stairs).Patellofemoral
pain syndrome can be relieved by avoiding activities that make symptoms
worse. methods to relieve pain include:
Taking nonprescript... 阅读全帖
g*2
发帖数: 658
16
不同的原因,治疗不同。 今天跑我也有一丝膝盖痛,赶紧停下来,走走就好了。 还是
休息为主。
KNEE PAIN TREATMENT — Physical therapy is essential to the treatment,
rehabilitation, and prevention of many of the conditions that affect the
knee joint and its surrounding supporting structures. Physical therapy for
knee pain often includes ice, elevation, and muscle-toning exercises.
Activity limitations — To speed recovery and protect against future knee
damage, activities that cause pain should be avoided temporarily.
The following positions and... 阅读全帖
R*****s
发帖数: 41236
17
☆─────────────────────────────────────☆
Rodimus (变叔 - 永动机器) 于 (Mon Jan 13 15:15:00 2014, 美东) 提到:
参加活动的进来占个楼,然后更新同一个帖子就好了,免得满版都是log贴,
请不要单独再开楼了,欢迎大家参加活动!
大使的【此恨绵绵】活动规则的link:
http://www.mitbbs.com/article_t2/Running/31713537.html
☆─────────────────────────────────────☆
Rodimus (变叔 - 永动机器) 于 (Mon Jan 13 15:17:29 2014, 美东) 提到:
我不参加最后活动奖励了,不过还是尽力坚持每天跑吧,实在跑不动了就歇.
(鞋都是inov8 155, 3.5mi都是Spin Class之后的砖头训练,跑步机上用foot pod
测的数据, 和跑步机自己的距离,速度大体吻合,不同机器,有些差异)
log:
date days score Distance... 阅读全帖
q*c
发帖数: 17993
18
http://www.forbes.com/sites/christophersteiner/2014/11/18/the-t
The Top 10 Ski Resorts In North America For 2015
1. Jackson Hole Mountain Resort, Wyoming — PAF: 99.0
We have crowned Jackson Hole as the preeminent place to ski not only in the
United States, but also within the whole of North America. More skiers are
finding out that Jackson is the right place for more than just the hucker/
powder set. Jackson established a record for its skier visits last year with
563,631, a 12% increase compare... 阅读全帖
g********4
发帖数: 477
19
just found a post which is quite helpful on flyertalk
ust returned from roundtrip SEA-SYD through YVR.
SEA-YVR-SYD
Bag was checked through. After arrival to YVR, I followed signs to
International terminal. There was a checkpoint with one Canadian immigration
officer, who looked at my passport and took Canadian customs form, which I
filled earlier on the plane. Then elevator or stairs and I ended up in the
International "zone". No security/scanners.
BEWARE: If you want to get out to the city befo... 阅读全帖
w******u
发帖数: 1030
20
来自主题: Travel版 - 请问一下北京换飞机出关
I would suggest to request a free wheelchair for all visiting parent(s)
traveling alone to ease their airport connect time. For the elderly who is
not a frequent-flyer, connecting in airport could be very stressful. (S)he
may be physically fit, but (s)he could have language barrier, could be too
shy to ask help, with the wheelchair service, (s)he will taken from one
airplane gate to the next plane gate by the airport employee.
Do not feel embarrassed to sit on a wheelchair in airport. Most elder... 阅读全帖
h***9
发帖数: 8948
21
Hint: Early Eridian Weapon
One character must be a Siren.
Go back to Fyrestone in the Arid Badlands; and after you kill the Mothrakk a
Eridian weapon will fall out but you have to search everywhere as the trash
plot
can be huge. When the Mothrakk is low on points shoot warning shots to get
it to
come towards you, then kill it on the approach.
Berserker: Eridian Cannon
Soldier: Thunder Storm
Siren: Ball Blaster or Wave Blaster
Hint: Sucker Born Every Minute Achievement/Trophy
The description for ... 阅读全帖
b*s
发帖数: 82482
22
刚才在路上,说不明白。除了那本书以外,原来在纽约客上Galdwell的文章可以给出详
细一些的例子吧:
http://www.gladwell.com/2008/2008_10_20_a_latebloomers.html
Articles from the New Yorker
Late Bloomers
October 20, 2008Annals of Culture
Why do we equate genius with precocity?
1.
Ben Fountain was an associate in the real-estate practice at the Dallas
offices of Akin, Gump, Strauss, Hauer & Feld, just a few years out of law
school, when he decided he wanted to write fiction. The only thing Fountain
had ever published was a law-review article. H... 阅读全帖
z*i
发帖数: 58873
23
来自主题: LeisureTime版 - 《韩战》
hehe, 你说这个我想起来去年看的一本书里面的一段。
Excerpt from

"
Or take the famous incident of Hemingway “liberating” Odéon.
In July 1944, Paris, abandoned by the Germans, had not yet been claimed
by the advancing Allies, who’d held back to let the French march in first
with Charles de Gaulle leading the parade down the Champs-Elysées. As his
entourage passed through Montparnasse, writer Leon Edel noted the damage
done to its famous cafés, the D&#... 阅读全帖
j******n
发帖数: 21641
24
来自主题: LeisureTime版 - zt 神龙帕夫:瘾君子还是彼得·潘
神龙帕夫:瘾君子还是彼得·潘
·肖 毛·

译出上一本书以后,由于暂时没有适合翻译的新书,我开始给自己放假:每
天坐在厨房的录音机旁,边听磁带边看电子书。三天前,随便拿出一盘《美国乡
村音乐系列情歌》(The best of country & western Vol.2),A面的第一首是
节奏轻快的《神龙帕夫》(Puff, the Magic Dragon)。这首歌我不知听过多少
次了,却从没有注意过歌词的内容。于是,我拿起磁带的歌片,看了看它的歌词。
然后,我被歌词的内容迷住了——我不能完全看懂它的象征意味,这反而让它显
得更加迷人。我想,这绝不是普通的流行歌曲,一定在西方或者说美英文化生活
中留下过印记。为了求证这一点,我必须上网。
我打开电脑,连上网络,在百度百科中发现了一篇谈论《神龙帕夫》的文章:
“‘有歌评这样说:这首歌主要是谈小孩子长大的过程,及对环境的感受。
歌词中的Puff实为一虚构的奇异龙,用此来影射孩子小时侯很喜欢小玩具,长大
后就把奇异龙甩掉,因为孩子已慢慢长大,对这种虚构的东西已不再有兴趣了’。
英文puff原本应是象声词,是烟或气体喷出时的声音……歌中pu... 阅读全帖
y******0
发帖数: 1169
25
来自主题: PhotoForum版 - First Portraits in 2010(Asking for Critics)
The First Portraits in 2010 (and my first photo post here)
I am new with portrait shooting, and hope to get some critics and feedback
here.
All are taken at a parking garage and stairs.
I used two remote lights, but I want to keep the ambient light, so I push
ISO to 1000 for the one at garage. And I used umbrella as main light on
camera left and one inside the car with tonsten gel to mimic the car light
inside.
Those took at stair, I used two lights with snoots and tongsten gel. Main
light was o
h********y
发帖数: 243
26
Update:
我的CPAT测试。前面说了10分20秒算是及格通过,最牛的白人大概用7分半,我用了8分58秒。我没有做过practice,和专项肌肉训练,只是看了多次视频,心里对整个过程有了大概的了解就去测试了。对路线不熟,是损失时间的最大因素。做过practice和专项训练之后应该会在8分左右。
从笔试到CPAT大概有20天左右,这20天基本每天一个5K,速度在8-9mph。算是体能储备。但是到了场上还是感觉体力不行。最大的killer就是第一项, stair climbing,这3分20秒下来,基本上感觉不到大腿了。200 stairs相当于70磅的负重爬20层楼。
还有forcible entry轮铁锤那项,真看出老中臂力不行了,白人黑人男的average6-7下搞定,我愣是轮了9下。这玩意练和不练区别太大了,纯靠臂力感觉震得肩头头嘛了,练过的臂力与腰腿力量一结合,锤子的速度起来就什么都有了。
不多说了,看视频
x****z
发帖数: 3473
27
zan!

分58秒。我没有做过practice,和专项肌肉训练,只是看了多次视频,心里对整个过程
有了大概的了解就去测试了。对路线不熟,是损失时间的最大因素。做过practice和专
项训练之后应该会在8分左右。
备。但是到了场上还是感觉体力不行。最大的killer就是第一项, stair climbing,这
3分20秒下来,基本上感觉不到大腿了。200 stairs相当于70磅的负重爬20层楼。
下搞定,我愣是轮了9下。这玩意练和不练区别太大了,纯靠臂力感觉震得肩头头嘛了
,练过的臂力与腰腿力量一结合,锤子的速度起来就什么都有了。
b******t
发帖数: 1974
28
谢谢你的帖子!
你真的很牛!
这下子我可以向我的女儿讲怎么可以做个firefighter了

分58秒。我没有做过practice,和专项肌肉训练,只是看了多次视频,心里对整个过程
有了大概的了解就去测试了。对路线不熟,是损失时间的最大因素。做过practice和专
项训练之后应该会在8分左右。
备。但是到了场上还是感觉体力不行。最大的killer就是第一项, stair climbing,这
3分20秒下来,基本上感觉不到大腿了。200 stairs相当于70磅的负重爬20层楼。
下搞定,我愣是轮了9下。这玩意练和不练区别太大了,纯靠臂力感觉震得肩头头嘛了
,练过的臂力与腰腿力量一结合,锤子的速度起来就什么都有了。
A******e
发帖数: 586
29
厉害

分58秒。我没有做过practice,和专项肌肉训练,只是看了多次视频,心里对整个过程
有了大概的了解就去测试了。对路线不熟,是损失时间的最大因素。做过practice和专
项训练之后应该会在8分
,速度在8-9mph。算是体能储备。但是到了场上还是感觉体力不行。最大的killer就是
第一项, stair climbing,这3分20秒下来,基本上感觉不到大腿了。200 stairs相当
于70磅的负重爬20层楼。
下搞定,我愣是轮了9下。这玩意练和不练区别太大了,纯靠臂力感觉震得肩头头嘛了
,练过的臂力与腰腿力量一结合,锤子的速度起来就什么都有了。
H******7
发帖数: 34403
30
来自主题: Joke版 - 这个英文怎么翻译才能达
Young I was,and ignorant of the taste of care;
Alone I loved to mount the stairs,
Alone I loved to mount the stairs,
And in new verses my imagined woes declare.
Now I’ve learned all the bitterness of life’s care,
Never would I hint my despair,
Never would I hint my despair,
Murmuring instead:Ah autumn,how cool and fair.
---------------------------------
While young, I knew no grief I could bear;
I'd like to go upstair.
I'd like to go upstair
To write new vreses with a false despair.
I know what ... 阅读全帖
j******6
发帖数: 1476
31
来自主题: pets版 - dyson dc41还是dc41 complete?
一不小心两个都买了,不知道留哪个?楼梯是地毯的,需要吸楼梯吸楼梯。看complete
的没有stair tool,而非complete的那个有stair tool,大家说有必要留complete的那
个吗?谁家用的来说说~~~
R******g
发帖数: 272
32
来自主题: Poetry版 - 庞德翻译的中文诗(Z)
[说明]这些是庞德对李白作品的英译,但与其说是在翻译,还不如说是再创作,从中可
以体会一个西方意象派诗人对一千多年前东方文明的理解。
The Jewel Stairs' Grievance
Li Po
The jewelled steps are already quite white with dew,
It is so late that the dew soaks my gauze stockings,
And I let down the crystal curtain
And watch the moon through the clear autumn.
(translated by Ezra Pound,who adds the following
NOTE: Jewel stairs, therefore a palace. Grievance, therefore there is
something to complain of. Gauze stockings, therefore a court lady, not a
servant who complains
c****t
发帖数: 19049
33
来自主题: SciFiction版 - 云图 英文版
HALF-LIVES
the first luisa rey
mystery
I
Rufus Sixsmith leans over the balcony and estimates his body’s velocity
when it hits the
sidewalk and lays his dilemmas to rest. A telephone rings in the unlit room.
Sixsmith dares not
answer. Disco music booms from the next apartment, where a party is in full
swing, and
Sixsmith feels older than his sixty-six years. Smog obscures the stars, but
north and south
along the coastal strip, Buenas Yerbas’s billion lights simmer. West, the
Pacific eternity East... 阅读全帖
D*****r
发帖数: 6791
34
来自主题: TrustInJesus版 - 诺贝尔奖得主比昂松的名言
http://www.gutenberg.org/files/37726/37726-h/37726-h.htm
IN GOD'S WAY
SCHOOL-DAYS
I.
In the melting snow on the hill-side by the sea, in the last rays of the
evening sun, stood a boy of fourteen, awestruck. He looked toward the west,
out across the sea; he looked toward the east, over town and shore and the
broad hills; in the background still higher peaks rose far away in the clear
sky.
The storm had lasted a long time; it had been more terrible, too, than any
the old people could remember. In ... 阅读全帖
S**U
发帖数: 7025
35
http://www.slate.com/articles/life/family/2008/06/on_a_short_le
Of all the relationship experiments ever tried—, the one described in the
May 15 New York Timesmight be the most perverse. For 10 years, Michael Roach
and Christie McNally have been together—for every single minute. The two
never stray more than 15 feet from each other. When they eat, they share a
plate. When they read, they share the book—the faster reader waiting for
the slower to finish the page. When they do yoga, they inhale an... 阅读全帖
Y**u
发帖数: 5466
36
☆─────────────────────────────────────☆
GWZW (GWZW) 于 (Fri Sep 14 20:41:02 2012, 美东) 提到:
By: 荞麦儿
婚姻是道场,
婚姻是道场,可以让人得道成仙,修得正果,而正果就是再也不用结婚了,因为你是仙
人。
听说天堂里也是不用结婚的。
但还在人间时,就得做这个道场。
曾看到一个统计,说百分之七十五的谋杀案件是发生在家人之间的。何苦要成家呢?成
了家就是一家人,为什么还要彼此杀戮?
因为婚姻是道场,很多人没有在这里修道,却只在这里吃喝拉撒与造人。
从脱口而出伤人的话到硬生生的把那些话咽回去,这是得道。
从为了洗碗的事要抡菜刀到默默地洗完一池子堆放的碗,默黙地想到那人的不容易,这
是得道。
从争谁对家的贡献大到为对方唱赞歌,这是得道。
从婚外情到回归,这是得道。
从一份又一份的离婚协议书到陪对方到老,并为对方铲下棺木上的第一铲土,或是为对
方按下焚烧炉的按钮,这是得道。
以前精力充沛时,因着种种磨合的不适,还会去抗争去拼命,而一个年轮一个年轮地磨
下来,原来爱争的都争不起来了,有时甚至只是相视一笑... 阅读全帖
c****r
发帖数: 576
c**********3
发帖数: 9
38
来自主题: MedicalCareer版 - interview的时候大肚子会影响么?
I just came back from an IV with 28w belly. I think the belly does not
bother me too much for the whole trip, but only one thing I want to mention.
I went to the IV by myself, and carried the suitcase with me. Since I
carried my laptop on my backpack, so I put everything else in the suitcase,
it was very heavy. In the airport, sometimes I have to lift the suitcase
when there is stairs or escalators. I will suggest to looking for elevator
if you can avoid stairs or escalator. Also, on the
t**j
发帖数: 418
39
来自主题: Quant版 - 请问brainteaser
A stair of 100 steps. You can either climb either one step or two steps but
no more each time and you can walk up entire stair any way you like with
rule above obeyed. How many possible combinations of ways to finish the walk?
谢谢
b*****r
发帖数: 4717
40
来自主题: Quant版 - GS FICC Divisional Strat 电面
被猎头忽悠了,都说了我不是programmer,还是把resume投了
围绕resume问了些问题,然后是brain teaser (后来发现是Google的编程题)
a rabbit jumps N stairs, can jump 1 or 2 stairs a time, how many ways to
get to the top.
1)数学解
2)pseudo-code
i**w
发帖数: 71
41
背景:fresh physics PhD
还没offer,但年前基本上不会再折腾了。
有重复。基本上都是很标准的题。
简单的题如果人家想问倒你也是很容易的。
面试书recruiter推荐
1) Mark Joshi: "Quant Job Interviews: Questions and Answers". I have
heard very good things about this book.
2) Xinfeng Zhou, "A Practical Guide to Quantitative Finance Interviews"
个人觉得非常有用, 大部分问题都在这两本上。
算法,C++, stochastic calculus 就看比较标准的几本。
- sqrt(i)=?
- You and me roll a dice,first one gets a six wins. You roll first. what
is the probability of you winning?
- A stair of n steps. Each time you st... 阅读全帖
w**********y
发帖数: 1691
42
多谢分享.大概做了做..欢迎补充和指正.
- sqrt(i)=?
e^{\pi/4 i} or - e^{\pi/4 i}
- You and me roll a dice,first one gets a six wins. You roll first. what
is the probability of you winning?
P(I win) = P(Y !win and I win) = 6/11
- A stair of n steps. Each time you step up 1 or 2 steps. How many
different ways are there to reach the top? what is the asymptotic limit?
Fibonacci sequence ..limF(n)/F(n-1)==x for n>2, solve x, and F(n) ~ x^{n-1}
- Moment generating function of standard model.
statistic book…
- Write a si... 阅读全帖
t*******y
发帖数: 637
43
第二题应该是6/11吧
能讲讲这个吗? - X1 and X2 are independent random variable with pdf f and g.
what is what is the pdf of X=X1+X2
Jacobian matrix for X1+X2 and X1-X2..

多谢分享.大概做了做..欢迎补充和指正.
- sqrt(i)=?
e^{\pi/4 i} or - e^{\pi/4 i}
- You and me roll a dice,first one gets a six wins. You roll first. what
is the probability of you winning?
P(I win) = P(Y !win and I win) = 5/6*1/6
- A stair of n steps. Each time you step up 1 or 2 steps. How many
different ways are there to reach the top? what is the asymptotic... 阅读全帖
x******i
发帖数: 14369
44
最近老看有人贴去秘鲁旅行的相片,不知怎么的偶觉得秘鲁的山水好鬼像偶们桂林,偶是指那个感觉,你们觉得呢。特别是山峰的形状和密度,当然,秘鲁的山要高很多。
还有那些古迹都是阶梯式分布在山坡上的,偶第一眼看就在想,这不是南美的龙胜梯田么。
还有就是那个云雾因绕的感觉,好像在猫儿山上呼吸的那样。
还有还有,好比第一张图,横看是山峰,竖看是印第安人的脸。偶们桂林的山这样的神话太多太多了,九马画山,象鼻山,有像动物的,有像某某人物的,每个山的形状都有特色。
偶不会异想天开吧:)
【 以下文字转载自 LosAngeles 讨论区 】
发信人: yoyozhang (早起的虫子被鸟吃), 信区: LosAngeles
标 题: 云和山的彼端——秘鲁纪行 亘古洪荒
发信站: BBS 未名空间站 (Fri Apr 27 02:41:14 2012, 美东)
阳光总在风雨后 请相信有彩虹
************************************************************************
大家酒足饭饱之际,Gang突然一声惊呼:你们快看啊,那是一张人脸。我吓得... 阅读全帖
i*********5
发帖数: 19210
45
来自主题: Tri版 - 逃离夺命岛
RUN course
On tired legs, the triathletes will begin the 8-mile run to Baker Beach
Battery by leaving the Marina Green running west toward Crissy Field to Fort
Point below the Golden Gate Bridge. From Fort Point they battle the
Presidio Headlands up and under the Golden Gate Bridge through the tunnel
and onto the Coast Trail. Runners will run next to the Coastal Defense
Batteries (Gunnery Locations from the turn of the century) until they reach
Lincoln Boulevard just past Battery Dynamite. They ... 阅读全帖
n********n
发帖数: 641
46
来自主题: _Living_For_Better版 - 换楼梯多少钱? (转载)
【 以下文字转载自 Living 讨论区 】
发信人: RWKR (单爷), 信区: Living
标 题: 换楼梯多少钱?
发信站: BBS 未名空间站 (Thu Feb 18 07:46:56 2010, 美东)
How much will be cost to change carpet stairs to hardwood stairs? $$$$$/step
?
w*******y
发帖数: 60932
47
Link:
http://www.5stardeal.com/
I think this is a great deal!! I am in for 1.
Description
This is a re-manufactured version of this great machine. No quality has been
sacrificed, however, as this robot comes fully backed by a 90 day limited
warranty from iRobot.
As a member of our latest generation of robots, the iRobot Roomba 560 Vacuum
Cleaning Robot features the newest innovations for dramatically improved
performance, reliability and durability. On-board scheduling allows you to
preset up t... 阅读全帖
w*******y
发帖数: 60932
48
Graveyardmall.com:
http://www.graveyardmall.com/categories/Daily-Deal/

lowest price elsewhere i could find was $47.25 shipped at amazon.com:
http://www.amazon.com/gp/product/B0020MLFQO/ref=olp_product_det
. Plus the item had 13 reviews on Amazon and 4.5/5 stars
Sylvania 72452 Motion Activated LED Guideway Lighting Kit (no wiring needed)
Product Description
Gone are the days of fumbling for a light switch in the dark. The Sylvania
LED Stair & Hallway Lighting Kit has a motion sensor that autom... 阅读全帖
w*******y
发帖数: 60932
49
Link:
http://www.graveyardmall.com/sylvani-motion-activated-led-guide
It looks like these are selling for $40 on Amazon...
Product Description
Gone are the days of fumbling for a light switch in the dark. The Sylvania
LED Stair & Hallway Lighting Kit has a motion sensor that automatically
turns LED lights on when movement is detected. An adjustable 'on-time' can
be set to automatically shut-off 20, 40 or 60 seconds after motion is no
longer sensed.
The built-in photocell makes LEDs active only i... 阅读全帖
d*****t
发帖数: 275
50
来自主题: _SFparents版 - 湾区钢琴团购组团
我准备组团办一个湾区钢琴团购。
自己参加过两次团购,终因价格不理想最后放弃。所以准备这次自己组一次试试看。
上两次的经验教训:
1。Dealer非常不喜欢bucket这个网站。我给dealer打电话的时候,他们说他们非常“
hate"这个网站。所以不会去那里竞价。
2。Dealer当时说如果你自己能组团,有40人的话,可以给我们一个不错的价格。当然
琴行是不会在电话上quote的。
3。Bucket是个start up,他们理念是不错。类似于反ebay的模式进行。让商家来互相
竞价争取买家。
1)但是首先,bucket没有ebay的知名度。多少商家会来呢?
2)bucket的这种把人流引向自己网站的做法,只是为了自己知名度的需要。他们
其实没有考虑到是否是对团购买家最有利的价格。
4。今年年初的那次团购,就是因为湾区仅有的3家dealer(我也是听说),只有1家愿意
出价5700(U1),结果大家都只能买他的。但是他们临阵出尔反尔把价格升到5850。虽
然不道德,但是对于买琴心切的买家来说,此时已没有办法。人为刀俎。
5。上次的百人团也是类似结果,最后将进6000出... 阅读全帖
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