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g****t
发帖数: 31659 | 2 Racket有完整的self contained CS教学体系。
我的办法就是陪着他，让他自己看资料，写程序。
frustration的时候提醒他休息下.
别的什么也不做。我事先说了,我不会这个东西，别问我。
希望他学会坚持，这就可以了。语言和知识并不重要。
这个有些不公平，我就是负责看球赛,他负责学习。 |
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m****o
发帖数: 182 | 3 Coursera上有个uw的老师教ml和racket（还有ruby）的课程很不错，可惜每次各种各样
的原因都没有坚持下来。 |
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g****t
发帖数: 31659 | 4 Racket有些大学上课用，我让他顺着大学课程自己看完事。
明年可以考虑学clojure。
我家老大从小习惯落后。成绩很普通。现在我太太觉得天天和我一起看
篮球也不是个事...
: Why not ClojureScript instead?
: He can quickly get real things done to show off.
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l*****n
发帖数: 328 | 5 You pay 40,000 a year, and by the 2nd or 3rd year, people stopped going to
classes. Exactly what are you paying 40K a year for? You are paying 40K a
year for an opportunity to be hired by a law firm.
To put it another way, it's almost as if the law firms and the law schools
came together and decided that top school will charge 40K a year, law firms
will only hire from those top schools, and they'll split the money. Is this
not a racket? A ponzi scheme?
And why is it that law firms refuse to hire |
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l*****n
发帖数: 328 | 6 You pay 40,000 a year, and by the 2nd or 3rd year, people stopped going to
classes. Exactly what are you paying 40K a year for? You are paying 40K a
year for an opportunity to be hired by a law firm.
To put it another way, it's almost as if the law firms and the law schools
came together and decided that top school will charge 40K a year, law firms
will only hire from those top schools, and they'll split the money. Is this
not a racket?
And why is it that law firms refuse to hire people outside |
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z***e
发帖数: 1757 | 7 higher education, whether it is law school or b-school, to certain extent,
is a signaling device for someone to distinguish himself from the rest of
the pile. You may call it whatever you want, racket or not. It's funny that
in your opinion wall street does not care about which school one is from. |
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a**y
发帖数: 335 | 12 ah. how come you can get your racket back even before you found you lost it
! mine is lost forever le...damn rpwt |
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z*********p
发帖数: 1877 | 13 welcome back!
I have extra racket too, in case you are still searching ..... |
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r*********r
发帖数: 1892 | 14 1 Kason racket, 1 tube EG1130 (a few birdies inside), and 1 knee wrap/
supporter were left in UBC yesterday night.
Let me know if it belongs to you and I will bring them in UBC this Wedn. |
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a*******i
发帖数: 11664 | 15 【 以下文字转载自 Tennis 讨论区 】
发信人: dreamsun (夢陽), 信区: Tennis
标 题: Roger Federer: How to spin your racket!!
发信站: BBS 未名空间站 (Tue May 4 20:18:25 2010, 美东) |
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P****S
发帖数: 2457 | 16 Once upon a time in Baltimore，there was a war.......ping-pong war, that is.
(By Tim Boggan):
”For the Danny Seemiller-coached U.S. team it's Barney Reed, David Zhuang,
and Mark Hazinski (in that playing order) and for the Laszlo Varga-coached
Defending Seattle Juic team it's Zoltan Varga, Fan Yi Yong, and Attila
Turbok (in that order). The U.S., being assured of $1,200 prize money for
reaching the semi's, is an underdog in this tie worth another $1200 to the
winner but probably not more, for the... 阅读全帖 |
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x*d
发帖数: 1696 | 17 Like a468950 said, go with what the coach recommended. For private training
like tennis and piano, you really have to trust your coach. If not, try
another one with reputation.
Your friend of good tennis player doesn't necessary be a good coach, unless
he/she had already trained some young kids successfully. Coaching tennis is
a different profession from playing tennis.
But there are a few things better known:
1. Children's talents are perhaps more diverse than rackets. When my son was
in class,... 阅读全帖 |
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K****D
发帖数: 30533 | 18 PT57A is one unique racket. It's not a line of rackets, like Radical,
Prestige, etc.
Any new material, new specs, new shape will make it not PT57A any
more.
It's the same as Wilson Prostaff Original 6.0 85. You can't just
make new generations every two years.
All in all, the legendary rackets have to be discontinued for
the health of racket sale business. Paint jobs are the way to go
and it has been tested working well by the biggest racket brands.
PT57A are now produced at very limited numbers ... 阅读全帖 |
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x*d
发帖数: 1696 | 19 If you can find an adult with ever-growing body and strength, eventually
being able to handle 40+ inch racket to hit 120mph serve and 90mph winner (
assuming rule allows), then I would say yes.
The point is the goal.
Tennis is designed for adult, tennis ball is designed for adult racket, and
vise versa. For hundreds years adult racket has been optimized for ball
contact, so it's not a surprise you get the besting feeling using adult
racket. I tried several junior rackets of different lengths mys... 阅读全帖 |
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A**4
发帖数: 2165 | 20 老桑用第一代碳素拍儿把木拍儿的技术发挥到了极至;
// Don't agree. The technique with wood racket is different, since it's
impossible to generate similar level of force with wood frame racket. The
ball speed are slower as a consequence. My first couple of rackets were wood
frame one and I still remember the difference when first using the first
metal alloy racket, which appeared in a short period before the carbon
synthetic dominance. Since the muscle power is limited, the skill for the
different racket frame can not be... 阅读全帖 |
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t******g
发帖数: 2253 | 21 Volkl Powerbridge 10 mid. This is a very soft racket. Volkl C10 pro 2012 is
also a good option. Compared to APD, I would probably suggest C10 pro since
it is more powerful than pb 10 mid. Basically since you like some rackets
with good spin, you should consider rackets with open string patter, 16*18,
16*19 or 18*20. And since you also want rackets that are soft, I think the
flex (stiffness) of the rackets should be lower, say less than 65. I think
you should demo C10 pro, which is soft and with ... 阅读全帖 |
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g*w
发帖数: 60 | 22 The store he mentioned is really bad at retringing. Last time my roommate let
them restring his racket, and finally he got a distorted racket back. The
frame of the racket was broken and twisted, and they didn't admit that it was
their fault and refuse to repay for it. I think what happened is they used
strength for tennis racket to restring badminton racket. Unfortunately, in
this small town, it's the only place where you can restring your racket if you
are not a member of the badminton club of |
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w**********i
发帖数: 1585 | 23 First, stop using this racket so you can keep the racket as is.
Contact badmintonalley and tell them what happened. They should be able to
contact Yonex and get a return # for you and have you mail the racket back
to Yonex. Yonex will then review the racket and evaluate the problem. They
will send you a new racket if they have determined it's a quality defect.
Make sure you DO NOT cut off the string when sending the racket back to
Yonex because they need to test string tension to see if it's ove |
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d**********i
发帖数: 365 | 24 在bwf上找的law of badminton,其中第九条是专门讲发球的。
1。 关于发球站位的规定：
9.1.2 the server and the receiver shall stand within diagonally opposite
service courts (Diagram A) without touching the boundary lines of these
service courts;
发球，接发球者只要站在对角的发球接发球区就行，只要在这个范围内，随便站
9.5 In doubles, during the delivery of service (Law 9.2, 9.3), the partners
may take up any positions within their respective courts, which do not
unsight the opposing server or receiver.
双打中，发球者以及接发球者的队友站位，在己方场地内随便站（我一般在队友发球的
时候站中线附近，离后接发球线大约1m，照顾更多反... 阅读全帖 |
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x***8
发帖数: 369 | 25 裁判判的是invading the opponent’s court，不是Obstructions。这个时候
obstruction只能是小李。
13.4.2
invades an opponent’s court over the net with racket or person except that
the striker may follow the shuttle over the net with the racket in the
course of a stroke after the initial point of contact with the shuttle is on
the striker’s side of the net;
谌龙扑球，李宗伟是放弃的状态，手上没动作，谌龙怎么影响李宗伟？李宗伟是想搓个
Hairpin net shot, 让高点在自己这边，球在下降的时候过网，从而限制谌龙进攻。谌
龙这个不是brush net kill（击球前或击球时拍子部分已经过网，但击球点在己方场地
），所以如果你同意击球点在谌龙一方就说明问题了。
13.4.4
o... 阅读全帖 |
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d*****I
发帖数: 166 | 26 相信很多人都来过这个店了。 最近店主进了些新货，这个周五到周日，连续促销3天。
很多东西都是赔本赚信誉。
所有的物品一律15% 折扣， 超过150美元的，赠送一张 Xia Jiwei group lesson pass
( 20 min one on one training).
另外一个好消息是， 你可以把你手里不用的拍子（品相好的， 呲牙咧嘴的就算了）
和胶皮拿那里去买， 具体细节和店主商量。
还有给乒乓爱好者提供技术和设备咨询。
Grand Open and Great Discount
Dear ALL,
JiaQi table tennis store will officially open this Friday, 30th Nov, 2012.
JiaQi table tennis store is managed by USA top table tennis player, JiaQi
Zheng.
The store has the following professional services:
1) We provide both new and use... 阅读全帖 |
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p******f
发帖数: 341 | 27 during last US open, people are talking about which racket Pete is going to change
all ove the place.
When you getting old, you need a little bit more power, lighter racket to handel.
my first racket is 6.0(85) too, i have no problem to swing it.
even I was just a beginner. Now, it is almost impossible for me to play
with this stick.
if your level is above 4.0, those professional racket will be ok to you.
Not like amateur can not use professinal racket.
Also, lots of pros racket is customized an |
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K****D
发帖数: 30533 | 28 TT Bandit is one of the better OS rackets I used. Other than too light and
OS, the racket is actually not bad, very balanced.
Radical has a very small sweet spot. If you hit the ball off the sweet spot,
it feels quite aweful -- almost no pop. That's why in my experience OS
rackets beat MP rackets in volleys.
I like Radical majorly due to the fact that I can swing the racket head
faster. With an OS racket face like TT bandit, it's very hard to swing
fast, esp. on the backhand side -- I feel a lot |
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K****D
发帖数: 30533 | 29 I am not trying to make you believe. You can always choose not
to believe. Racket manufacturers have tried their best to achieve
that goal (i.e. the majority of retail base not knowing the paint
job tricks).
Just a few of facts (or consider it as my personal opinion if you
prefer):
1) Graphite rackets last forever. They don't go bad. They have
infinite shelf life. The only way to make people buy more rackets
is to promote new generations frequently (and discontinuing old
ones).
2) For the last 2... 阅读全帖 |
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x*d
发帖数: 1696 | 30 I spent quite a while looking into this.
1. All super lite adult rackets are longer than 27.5, mostly 27.67, like
head S5/S6.
2. 5/6-year old usually has no power, no matter how hard they try :). Trust
me, I started training him at 4 with all size rackets (including 19" I didn'
t list). So generating power is not the priority.
3. The most important thing for a kid to learn is hand-eye coordination,
footwork and form. hand-eye coordination has little to do with the choice of
racket (actually adu... 阅读全帖 |
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K****D
发帖数: 30533 | 31 影响挥重的主要因素，除了重量、平衡，还有什么？
昨天试了两个拍子。一个11.3 oz, 5 pt HL. 一个11.0 oz, 4 pt HL.
很奇怪的觉得后者重。甚至跟偶主力拍 (12 oz, 6 pt HL）差不多。
这个是什么原理？
UPDATE: 刚刚用TW的计算器算了一下，结果比较出乎意料：
Racket 1: 11.5 oz, 6 pt HL. SW = 294
Racket 2: 11.0 oz, 4 pt HL. SW = 302
Racket 3: 12.1 oz, 6 pt HL. SW = 326
最轻那个挥重反而重于中等那个，难怪偶会觉得难挥。
看来光知道重量和平衡还是无法推断挥重啊。上面的racket 2如果再加两层
overgrips, 将和racket 1重量、平衡相仿，但是挥重只可能比302更重，和
racket 1会有较大区别。 |
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d**********8
发帖数: 326 | 32 All my two cents.
The cons are:
1. not the cutest one;
kidding
2. not the best for serve,
my feeling is: due to not headlight enough, head size is relatively big,
again, generally speaking, small head size and light head will maximize the
power with your swing. That is why Head Prestige Mid is called “暴力拍”.
Also, I think the beam is kind of wide, which reduce your swing speed due to
air resistance
3. not the best for volley,
the lighter the head, the heavy the racket, better for volley. Since th... 阅读全帖 |
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K****D
发帖数: 30533 | 33 I am not sure how scientific this study is. (It is very valuable study
though.)
For example, 6.1 90 and 6.1 95 are two different rackets.
Prestige Mid, Prestige MP, Prestige Pro are 3 different rackets.
APD, with or without cortex, are different rackets.
I haven't looked at the list carefully and am not sure if the list is the
player "sponsored" rackets or their actually racket under the paint job.
I am a little surprised to see only 9 Prestiges. Head PT57A is one of the
most popular pro stock r... 阅读全帖 |
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s***t
发帖数: 197 | 34 racket (1): noise.
"Small kids can make a lot of racket."
racket (2): something that's dishonest or deceptive.
"The Tobacco Industry is quite a racket."
racket (3): an occupation.
"I've been in the ESL racket for fourteen years."
rank: give someone a difficult time.
"She's always ranking her teacher."
rat: a despicable person.
"I thought I loved you, but now I know you're really a rat."
razz: annoy someone.
"Will you please stop razzing me?"
rear (end): buttocks.
"Dave fell on his rear (end)."
r |
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N****t
发帖数: 156 | 35 Hi Racket Swingers,
It's that time again. BADMINTON!
The following is the clip from the Spring Brochure:
ADULT BADMINTON - ADVANCED/INTERMEDIATE
Open courts for intermediate and advanced players. Mostly doubles, but
singles when court space available. Bring your own racket; feather
shuttlecocks provided. Lane School Gym. (max 22) Tues., 7:30 – 10:00pm, 4
/5 - 6/7 (no use 4/19) Fee: $15
Set up night is 4/5, play will be conducted once set up is complete
ADULT BADMINTON - BEGINNER/INTERM... 阅读全帖 |
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l*********y
发帖数: 3447 | 36 Strictly speaking, if he/she just put racket close to net, it is not illegal
, which is the annoying part since otherwise you can just simply call it and
get the point.
So there are two things you can do:
1. if the racket is already beyond the net then call it and get the point
2. if the racket is very close to net but you are not sure it is beyond the
net or not, just hit the birdie and let the racket go further within the
stroke and touch the racket of the opponent, then call it and get the po... 阅读全帖 |
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p**o
发帖数: 3409 | 37 http://www.ittf.com/ittf_handbook/hb.asp?s_number=2
2.04.08 Before the start of a match and whenever he changes his racket
during a match a player shall show his opponent and the umpire the racket he
is about to use and shall allow them to examine it.
——说明拍是可以换的
2.05.05 The racket hand is the hand carrying the racket.
2.05.06 The free hand is the hand not carrying the racket; the free arm
is the arm of the free hand.
——貌似是单数…… |
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K****D
发帖数: 30533 | 39 Still quite hard, for example, most heavy rackets are head light,
and thus even less power than a light but head heavy racket.
And they don't tell you how heavy it is or how much head light
on the racket. Really hard to determine just by looking at the
racket.
Stiffness is one easy thing to look, but I don't remember if
stiffness is printed on the racket?
's
powerful |
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g*****y
发帖数: 7271 | 40 Got the rackets back. One of it turns out to be demo racket and costs $79,
the other is $99. The demo racket is the last one that has grip size of 3/8.
I cannot find any trace of usage on the demo racket. Guess they changed the
head guard, replacement grip and grommet all together. Seems demo racket is
not bad for its price at all.
is
for
haha. |
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Y**s
发帖数: 1632 | 41 Oh yea, DEFINITELY feels different. One racket is stiffer, one racket is
softer...etc. but that difference may be even more significant with
different string setups. My advice is, before deciding to buy a new racket
- change the string set up and see if it gets what you want. Most of the
times that'll get you what you want.
This is often time the issue with demoing racket - when you do buy your own
and use your own string setup - suddenly you feel the racket doesn't play
like when you first |
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K*******6
发帖数: 74 | 42 重开一楼，大家过来顶！这帖子是从 奔甜点
http://www.mitbbs.com/article_t/Tennis/31463141.html
移过来，借chinesegogo的光。
Wilson Pro Staff mid size(6.0)的前身今世
Wilson first manufactured the Wilson pro staff 125, It is a 125 head size
racket with braided graphite. Then Wilson decided to reduce the head size
and put both successful Wilson Ultra and Sting into together. I believe the
Wilson Sting doesn't have PWS on it. KennyD, please verify that. The
Wilson Pro Staff Midsize is manufactured in 1982 until 2003/4, Then Wilson... 阅读全帖 |
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T*********0
发帖数: 4816 | 43 My understanding is that you are not allowed to let the ball touch the
ground then serve, because once the ball touches the ground, it is no longer
in play.
可以是上手球，也可以是下手球，any direction。但就是不能let the ball hit the ground。
It is stated clearly on item No. 16 below:
"The server shall then release the ball by hand in any direction and hit the
ball with the racket before the ball hits the ground."
16. THE SERVICE
Immediately before starting the service motion, the server shall stand at
rest with both ... 阅读全帖 |
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x*d
发帖数: 1696 | 44 Melbourne swings pretty fast and I don't feel heavy.
Last night I once accidentally took a wrong different racket when rushing to
the other side of the net, after turning on the ball machine (no remote
control). The wrong racket was my old one that is 1oz lighter but more
center weighted. At the first few shots I didn't feel the racket weight was
so different, only felt it was less powerful and thought I was getting used
to the new racket :). That says the swing weight is probably similar betwee... 阅读全帖 |
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K****D
发帖数: 30533 | 45 偶读的2014年的规则没说不可以。而且这一段就一直没改动过。
USTA Comment 4.2: What may a player who has broken a string or
racket do if the player does not have a replacement racket?
Unless prohibited by a published rule adopted by the tournament,
the player may play with the broken racket. The player may leave
the court to get a replacement racket. The player may ask someone
else to get a replacement racket. |
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d*******r
发帖数: 3299 | 46 我看他工作之余是在搞琢磨自己的language的，大家回头看看他设计的东西如何吧
Typed Racket 是一种类似 typed lisp/scheme 的东西
Yin Wang @ Google Plus
Shared publicly - Dec 1, 2013
#racket
Spent hours trying to get my first interpreter for the Y programming
language to pass Typed Racket's type checker and still have 8 errors can't
be resolved because of the rough edges of the type system.
In general Typed Racket is very powerful and helpful. It caught quite some
actual errors, and is much more powerful and easier to work with than the
typ... 阅读全帖 |
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S**n
发帖数: 486 | 47 Last night (Thursday) I was in Royal B in the attend to exchange my friend's
10 time passes (he has 2 unused
passes). At the front desk, Walter refused to exchanged for me. I asked to
speak to Victoria because I had
emailed her when the day I saw the massive email they send out regrading to
switching to Royal B passes from
GGBC passes, but she never replied me. Just because the passes were
purchased before July they turned me
down. I asked him to called Victoria and asked to speak to her, howeve... 阅读全帖 |
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W*****B
发帖数: 4796 | 48 做黑女人很难吗？
也许吧。
但是这样就有理由在球场上那样表现吗？
那样指着裁判鼻子骂就能换来尊重吗？
Serena Williams and the Burdens of Being a Black Woman [OPINION]
Twenty-four years ago, on a crisp Halloween evening in Oakland, California,
Venus Williams, 14, made her professional debut at the Bank of the West
Classic. The phenom-in-training was wearing unbranded clothing, plastic
beads on her cornrows and was beaming with the kind of confidence that
helped her extend Arantxa Sanchez-Vicario, then the №.2 player in the world
, to three sets.
... 阅读全帖 |
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K****D
发帖数: 30533 | 49 来自主题: Classified版 - 出售老球拍 Contact me for details and price quote. Shipping for 1 racket is
around $10, 2 rackets is around $14, 3+ rackets is $18 fixed.
I can provide advices on your racket selection.
Wood:
Slazenger Demon, 4 1/2, 7.5/10
Wood/Graphite:
Donnay Bjorn Borg, 4 3/8, 9/10
Prince Woodie, 4 5/8, 9/10
Magnesium:
Prince Magmesium Pro, 4 1/2, 8/10
Graphite:
Dunlop Black Max Midsize, 4 5/8, 9/10
Dunlop McEnroe Boron Midsize, 4 3/8 (contact me for details), 7/10
Fox Bosworth WB-210, 4 1/2, 7/10
Head Composite Pro, 4 ... 阅读全帖 |
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q*****g
发帖数: 618 | 50 My whole badminton bag with two rackets in there were stolen last week. I
really like the TSF 105Ti, which I bought in China. Now I'm looking for a
racket sold in U.S. so that I can quickly resume my hobby. Although I have
been playing for almost 5 years, I knows little about rackets. Below are my
information. Please throw your 2 cents :)
I'm a 35 years old male player. My strength and level is OK. I like a little
bit more control than smashing. Sometimes my wrist gets hurt. So I don't
want a ha... 阅读全帖 |
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