K****D
发帖数: 30533 | 1 Dampener降低power.
所以如果你的拍子本身力量就小，就不适合再加dampener.
偶任何拍子都不用dampener. |
|
T*****T
发帖数: 199 | 2 你还是没有明白dampener的原理。
拍弦的振动并不是被dampener吸收，而是因为dampener破坏了振动的对称性而没有振起
来。你还可以说原本用来振动的能量用在了球上-当然这也是瞎扯。
再者说，拍弦振动时（你感到怦~~）球早已飞出去了。
反正，任何角度再讲，这点能量都没影响。 |
|
s****s
发帖数: 775 | 3 什么拍子适合不用dampener？costco神拍偶尔把dampener打丢了，竟然发觉打起来很顺
手，特别是双反，不知道为什么。 |
|
T*****T
发帖数: 199 | 4 作为理科生可以很负责的告诉你，dampener不会降低power。
当然，打起来会少一点pia pia 的声音，对有些人来说可能感觉不够爽。
dampener 就是个感觉的问题。有兴趣的话可以试试不同的，感觉舒服就行了。 |
|
|
w*******y
发帖数: 60932 | 6 Thermaltake via eBay
Thermaltake 120mm Fan Noise Dampener
$1.99 with free shipping
- new batch of these 120mm Fan Noise Dampener Sets -
|
|
a***a
发帖数: 40617 | 7 就是那种2根管子，里面灌着彩色液体的。打了3周，漏了，发现是油
还有什么dampener推荐吗？还是就皮筋？ |
|
w********u
发帖数: 1865 | 8 walmart一块一大包的那种宽皮筋就好了，dampener经常会打飞掉找不到。 |
|
j*****A
发帖数: 1395 | 9 这种绑法看起来比较丑。
最好是绑在拍面中间的6根线上，从最左边打个结绕穿每根线然后回到打结的那根线再
打个结，这样效果最好，类似于买来的条形dampener。 |
|
b*****i
发帖数: 318 | 10 潜水有一段时间了，看这里大虾们都是网球好手，在这里请教一个小问题。我一直用
Prince的worm dampener,可是好像不经用。上一个才打了3次，就又断了。请这里的牛
人们介绍一下经验？
先谢了 |
|
h******h
发帖数: 68 | 11 不忍心伤害你不过还是要告诉你，dampener没有减少震动的作用
唯一的作用就是感觉上，声音上和心理上的
oppoent |
|
K****D
发帖数: 30533 | 12 Well, 从理科角度，可以比较明显的证明任何在网球拍上增加的软绵绵的零件
都会导致power损失。这种软绵绵的零件，只要不是理想弹簧，任何形变都导致了
能量损耗。
当然偶作为工科男不是这么考虑的。偶首先是自己的打球感觉是这个结论。
其次dampener限制了线的自由移动，等于人为略微短了线的长度。线越长，
trampoline效应越强，力量越大。历史上很多拍子都是根据这个原理设计的。
比如下面这个： |
|
n********r
发帖数: 4558 | 13 我觉得dampener只不过改变拍面的硬度，就象乒乓球拍胶面厚度一样。 |
|
j****y
发帖数: 1714 | 14 At least 3 more years of housing troubles seen
http://www.reuters.com/article/idUSTRE6B656N20101207?
loomia_ow=t0:s0:a49:g43:r5:c0.037975:b40349862:z0
By Linda Stern
WASHINGTON | Tue Dec 7, 2010 3:25pm EST
(Reuters) - The housing market will remain depressed, with record high
foreclosure levels, rising mortgage rates and a glut of distressed
properties dampening the market for years to come, industry experts
predicted on Tuesday.
"We don't see a full market recovery until 2014," said Rick Sharga... 阅读全帖 |
|
h********5
发帖数: 386 | 15 Reducing furnace noise?
I'm trying to cut down on the sound coming off our home furnace. I already
have the furnace room walls insulated with rockwool, which I find
insufficient. Short of adding more ...show more
Best Answer:
halfwittcg answered 7 years ago
It depends on what about the furnace unit is making the noise.
***Typically it is the fan motor***, or associated moving parts.
Sometimes it is the housing vibrating from the spinning of the blower fan.
It may be the plenum or metal (or other... 阅读全帖 |
|
j****y
发帖数: 1714 | 16 发信人: joyjoy (joy), 信区: Living
标 题: 3 more years of housing troubles [zt]
发信站: BBS 未名空间站 (Sat Dec 18 23:22:43 2010, 美东)
At least 3 more years of housing troubles seen
http://www.reuters.com/article/idUSTRE6B656N20101207?
loomia_ow=t0:s0:a49:g43:r5:c0.037975:b40349862:z0
By Linda Stern
WASHINGTON | Tue Dec 7, 2010 3:25pm EST
(Reuters) - The housing market will remain depressed, with record high
foreclosure levels, rising mortgage rates and a glut of distressed
properties dampening the market for ... 阅读全帖 |
|
c****1
发帖数: 5654 | 17 I just received the Prince racket i ordered one week ago today, found out
there is a big rubber letter P on the string, do i need to remove it before
i play or just let it alone? can it be used as a vibration dampener?
i ordered one dampener too, in case i could use it on my old Head racket,
thanks! |
|
g********n
发帖数: 2314 | 18 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: dadabear (bless you), 信区: SanFrancisco
标 题: [合集] goldenrain的观点未免偏颇
发信站: BBS 未名空间站 (Thu Feb 8 16:24:51 2007), 站内
☆─────────────────────────────────────☆
MSJ (Mission San Jose) 于 (Tue Feb 6 00:42:38 2007) 提到:
看完他blog的《现在在哪里买房风险小》，我只能笑着摇摇头。在我眼里，这个列表与
其说是“风险小”列表，不如说是“房子难涨地区列表”。试论证一二：
1. 常言道“强者恒强，弱者恒弱”。NYC, SF地区房价高企不是一年两年了，支撑房价
的不是那个affordability的percentage，而是能afford的人口数和房子总数的比例。
这里看百分比是没有多大意义的。只要还有人能买得起还愿意买，即使affordability
只有15%又如何呢？
2. 正如high tech公司的P/E要远大于... 阅读全帖 |
|
c**i
发帖数: 6973 | 19 If you'd like to Chinese, go straight to the last line.
Andrew Jacobs, China’s Army of Graduates Struggles for Jobs. New York Times
. Dec. 12, 2010.
http://www.nytimes.com/2010/12/12/world/asia/12beijing.html?_r=1&scp=1&sq=liu%20yang&st=cse
"When he finally found a job selling apartments for a real estate agency, he
left after less than a week when his employer reneged on a promised salary
and then fined him each day he failed to bring in potential clients.
"In the end, Mr. Li and his friends se... 阅读全帖 |
|
T**********r
发帖数: 1223 | 20 http://web.stratfor.com/images/writers/CHINA_RARE_EARTH_ELEMENTS.pdf?fn=9617327557
China and the Future of Rare Earth Elements
October 14, 2010
clip_image002
STRATFOR
PDF Version
* Click here to download a PDF of this report
A recent diplomatic spat between China and Japan has heightened territorial
tensions and called attention to China’s growing forcefulness with foreign
powers. One of the more intriguing aspects of this development was China’s
suspension of the export of “rare ea... 阅读全帖 |
|
t*******h
发帖数: 2882 | 21 http://www.atimes.com/atimes/South_Asia/LL18Df01.html
India's growth not all shine
By Kunal Kumar Kundu
BANGALORE - India's gross domestic product (GDP) figures for the second
quarter of its fiscal year surprised on the upside as year-on-year growth
was pegged at 8.9%. While the numbers are confidence boosting, it is
important to realize that there is a statistical element to the latest
number, while being very positive, rather than the data indicating a
substantial improvement in actual perform... 阅读全帖 |
|
A*Q
发帖数: 1579 | 22 刚看到的，Yahoo的评论
>>P. Fleet 1 minute ago
The Chinese government is raising rates to cool the speculation in their own
housing bubble and have been very proactive in changing the laws to
discourage speculation. We should have done the same, but our government and
Wall Street were too busy counting the profits and tax revenues to see
beyond the next quarter.
Food inflation is one problem, but food shortages are going to be the real
problem. Prices were already on the way up and then the weather made ... 阅读全帖 |
|
A*Q
发帖数: 1579 | 23 Google 翻译的
>>P. Fleet 1分钟前
中方政府提高利率来冷却在他们自己的猜测
房地产泡沫，并已非常积极主动地改变法律
打击投机。我们应该那样做，但我们的政府和
华尔街一直忙于计算的利润和税收看到
超越下一个季度。
食品价格上涨是一个问题，但粮食短缺将成为真正的
问题。价格已经在路上了，然后天气使
情况变得更糟。中国正在寻求在埃及的街道，并采取措施
以防止同样的事情不会发生在他们的国家。
我们有4500万家庭的食品券。我们的战略是什么？我们
首先应削减乙醇补贴和生产足够的粮食，而不是
只为了养活国，但出口到世界各地。
>>一个雅虎用户2分钟前
“投资者担心中国经济增长放缓可能会影响美国，
澳大利亚和铁的需求，它们的出口削减其他经济体系
矿石，机械和其他物品。“
它是模糊的，其出口量将达到dampened.
>>commentjohn 第16分钟前
听起来像中国的债券是更好投资美国债券。
观看所有的现金得到吸出美国市场。
>> Toeser 19分钟前
那么，中国比美国更聪明在各个方面？伯南克并没有太糟糕
去China.
>>commentBob 20分钟前
我们必须找到减... 阅读全帖 |
|
b**********n
发帖数: 2812 | 24 Japan’s Strict Building Codes Saved Lives
By JAMES GLANZ and NORIMITSU ONISHI
Hidden inside the skeletons of high-rise towers, extra steel bracing, giant
rubber pads and embedded hydraulic shock absorbers make modern Japanese
buildings among the sturdiest in the world during a major earthquake. And
all along the Japanese coast, tsunami warning signs, towering seawalls and
well-marked escape routes offer some protection from walls of water.
These precautions, along with earthquake and tsunami dri... 阅读全帖 |
|
k******1
发帖数: 2883 | 25 格雷丝高表示对不良卫生习惯要宽容：
【 以下文字转载自 Military2 讨论区 】
发信人: subzero8080 (Chilling), 信区: Military2
标 题: 巨搞，美海军军官在印度导弹驱逐舰上呆了5天，震惊了
发信站: BBS 未名空间站 (Sun Sep 11 16:32:58 2011, 美东)
Reddit上的Ask Me Anything，全文在这里（直播中）
http://www.reddit.com/r/IAmA/comments/kc1ze/iama_us_naval_offic
Wikipedia: "INS Delhi (D61) is the lead ship of her class of guided-missile
destroyers of the Indian Navy. She was built at the Mazagon Dock Limited in
Mumbai and commissioned on 15 November 1997. This class is among the largest
warship... 阅读全帖 |
|
c**i
发帖数: 6973 | 26 James Simms, Japan's New Passenger Jet Takes off Into a Perfect Storm. Wall
Street Journal, Sept 24, 2011.
http://online.wsj.com/article/SB10001424
053111903703604576588782647706772.html
Note: Geared Turbofan (GTF) is Pratt and Whitney's invention. Whether it is
as good as touted, it is unclear yet.
(a) geared turbofan
http://en.wikipedia.org/wiki/Geared_turbofan
(The Geared turbofan is a type of turbofan airplane engine, similar to a
turbojet. It consists of a geared ducted fan with a smaller d... 阅读全帖 |
|
k*********u
发帖数: 2897 | 27 美国拿粮食收割世界的时间应该快到了。
布局都布了10多年，差不多该收网了。
就等着天灾加把油了，一切具备了。
China to add to squeeze on world corn supply
http://finance.yahoo.com/news/china-add-squeeze-world-corn-0221
BEIJING/SINGAPORE (Reuters) - Beijing and the influential U.S. agriculture
department may have overstated China's corn crop by as much as 14 percent,
pointing to higher imports from the world's second-largest consumer of the
grain that could squeeze already tightening global supplies.
If China plugs the gap between projected and actua... 阅读全帖 |
|
s*********8
发帖数: 901 | 28 WASHINGTON (AP) -- The U.S. trade deficit surged to the widest imbalance in
more than three years in January as imports hit an all-time high, reflecting
big demand for foreign-made cars, computers and food products.
U.S. exports to Europe fell, raising concerns that the debt crisis in that
region could dampen U.S. economic growth.
The January trade deficit widened to $52.6 billion, the biggest gap since
October 2008, the Commerce Department reported Friday. Imports rose 2.1
percent to a record $... 阅读全帖 |
|
|
M******8
发帖数: 10589 | 30 http://www.huffingtonpost.com/devin-stewart/is-china-taking-the
Now that China's leadership transition has been completed, its new president
Xi Jinping faces numerous challenges, from
maintaining economic growth to combating corruption, pollution, and food
supply scandals. Yet disagreement has been stirring
on the best path to achieve these goals: whether Xi should relax political
control over society to match economic reforms that
began with Deng Xiaoping in 1978.
Signs suggest Xi's inclination... 阅读全帖 |
|
x*****e
发帖数: 19 | 31 http://tieba.baidu.com/p/2291873466
I Have a Dream
Inspired by Dr. MLK and a post on tianya.com
I am honored to join with you today in what will go down through generations
as the greatest online demonstration for justice in the history of our
nation.
Sixty-four years ago, a group of great Chinese, declared to the world that a
new People’s Republic had risen from the ashes. This deafening voice is a
great beacon light of hope to millions of Chinese who had been seared in the
flames of poverty, i... 阅读全帖 |
|
i*******g
发帖数: 1154 | 32 BEEF PRICES IN SOUTH KOREA NOW WORLD'S HIGHEST
One-hundred-dollar steaks and gold flaked chocolates once symbolized both
the luxury and expense of urban life in Japan, but the U.S. Meat Export
Federation (USMEF) now calculates that South Korea has supplanted Japan as
the country with the highest average beef prices in the world.
A strong currency and high import duties have coupled to create the
distinction, but the continued absence of U.S. beef, which once accounted
for half of total beef cons... 阅读全帖 |
|
a********k
发帖数: 32 | 33 还有一篇：
希望有助于提高亚裔高校录取率的‘法律之友’已递交最高法院
(2012-05-31 00:18:24)
希望能帮助提高亚裔高校录取率的“法律之友”文书已经正式递交最高法院了。文书
的具体内容请见： http://www.80-20educationalfoundation.org/pdf/amicus-brief.pdf
主要发起组织80-20亚裔教育基金会向大家介绍了这篇文书的起草和递交的一些具体情
况：
“二月时，美国最高法院同意受理Fisher vs. University of Texas (德州大学) 关
于高校录取学生时把“族裔”作为考量之一这种做法是否违宪。事实上，因为亚裔家庭
一般很重视孩子的教育，所以亚裔孩子普遍比较优秀。于是许多名校一看考生是亚裔就
人为地增高了录取门槛。例如要入同一所名校，亚裔录取生的SAT要比西裔和非裔高三
，四百分。
“80-20基金会今年三月时组织了一个美籍亚裔的民调来考量亚裔是否支持法院来取消
这对亚裔实则有反向歧视的‘族裔优先’的高校录取政策。在一个月左右的时间，我们
争取到了五万签名。其中四万七千有效的美籍亚裔签名里，支持和反... 阅读全帖 |
|
u*******g
发帖数: 3300 | 34 Russian troop deployment in Ukraine's Crimean Peninsula is likely to trigger
a reaction from Turkey. Crimea lies only 173 miles from the Anatolian
coastline, across the Black Sea. It is home to a community of Turkic Tatars,
who are ethnic and linguistic kin of Anatolian Turks and oppose potential
Russian annexation of the peninsula. Turkey has established close ties with
Ukraine, a useful buffer with the bear to the north, since that country's
independence and will take issue with violation of K... 阅读全帖 |
|
b*****d
发帖数: 61690 | 35 DONETSK, Ukraine — Worshipers at the Bet Menakhem-Mendl synagogue in this
eastern Ukrainian city confronted a horrifying scene as they left a Passover
service this week: masked men on a sidewalk handing out leaflets demanding
that Jews register and pay a fine or leave the area, witnesses said.
DONETSK, Ukraine — Worshipers at the Bet Menakhem-Mendl synagogue in this
eastern Ukrainian city confronted a horrifying scene as they left a Passover
service this week: masked men on a sidewalk handing ou... 阅读全帖 |
|
a*******a
发帖数: 451 | 36 It is one of the most advanced and densest cities in the world, the
financial hub of Asia. It was the hope and belief of the government leaders
that people would submit and Hong Kong would be brought into the fold and
under the same law of the rest of China. This is laziness, since the leaders
have long known and at time have acted to increase the freedoms of Chinese
in other parts of China. However, Hong Kong has long enjoyed it's own
identity and freedoms within China. In this city, thousands ... 阅读全帖 |
|
x****y
发帖数: 1853 | 37 这才是真正的bearish信号。 跟最近的Baltic Dry Index一起看，recession 离我们不
远了。
Highlights (From Bloomberg)
The factory sector ended 2015 with a giant thud. Durable goods orders fell 5
.1 percent in December vs expectations for a 0.2 percent gain and a low-end
estimate of minus 3.0 percent. Aircraft orders didn't help but they weren't
the whole cause of the problem as ex-transportation orders fell 1.2 percent
vs expectations for no change and a low-end estimate of minus 0.4 percent.
Core capital goods, which exclud... 阅读全帖 |
|
|
c******r
发帖数: 2306 | 39 "But it is possible to create a society in which everybody is given not
equal rewards, but equal opportunities, and where rewards vary not in
accordance with the ownership of property, but with the worth of a person's
contribution to that society."
"I did not understand what a cosseted life would do to the spirit of
enterprise of a people, diminishing their desire to achieve and succeed. I
believed that wealth came naturally from wheat growing in the fields,
orchards bearing fruit every summer, ... 阅读全帖 |
|
t******l
发帖数: 10908 | 40 气枪也有配 rifle harmonic dampener 的？尼玛确实日新月异跟不上形势了。
: 好像是气枪吧
|
|
W*****B
发帖数: 4796 | 41 China: Talks impossible with a US knife to Beijing's neck
BEIJING (AP) - A Chinese trade envoy says talks with Washington are
impossible while the United States "holds a knife" to Beijing's
neck by imposing tariff hikes.
The deputy commerce minister's warning Tuesday followed Beijing's
release of a report accusing President Donald Trump of bullying other
countries and disrupting the global economy.
The report dampened hopes for progress toward settling the dispute over
Beijing's technolo... 阅读全帖 |
|
g*******y
发帖数: 202 | 42 https://qz.com/1419180/chinas-nuclear-option-in-the-us-trade-war-would-be-
economic-suicide/amp/
美国是有分析和预案的
Tensions between the US and China just keep rising. Last week, for example,
US vice president Mike Pence made a speech laying out the Trump
administration’s case for an all-out economic confrontation with China,
beyond its current tariffs on Chinese goods.
But does the White House have the upper hand? A recent New York Times column
by Andrew Ross Sorkin points out that China does have a “n... 阅读全帖 |
|
b********n
发帖数: 38600 | 43 Global stocks rally splutters as trade talks, data disappoint
https://www.yahoo.com/finance/news/asian-shares-start-cautiously-trade-
011434915.html
LONDON (Reuters) - A four-day rally in world stocks ran out of steam on
Thursday and the dollar touched a near three-month low as mixed signals from
U.S.-China trade talks and caution at the Federal Reserve applied the
brakes.
China said the three days of talks in Beijing had established a "foundation"
to resolve differences, but gave virtually no d... 阅读全帖 |
|
T****t
发帖数: 11162 | 44 美帝右派已经把这看成有利于中国人的提案了。 所以这下提案根本通不过的。
https://cis.org/North/View-Left-HR-1044-Trumps-Tax-Bill-Gift-Haves
View from the Left: HR 1044 is – like Trump’s Tax Bill – a Gift to the
Haves
FacebookTwitterRedditLinkedInEmailCopy LinkPrint
By David North on July 10, 2019
As a dyed-in-the wool, life-long, New Deal Democrat, I am equally opposed to
the GOP-backed Trump Tax Law as I am to the Democrat-backed HR 1044, the so
-called "Fairness for High-Skilled Immigrants Act of 2019", which seeks to
damage our ... 阅读全帖 |
|
b******a
发帖数: 1337 | 45 Trump's economic hand grenades will do even more damage to the U.S.
Today 2:25 PM ET (MarketWatch)
Share
Print
By Gary Clyde Hufbauer
The administration's latest fight with China is based on bad analysis
The source of Wall Street turbulence? A souring trade war with China.
President Trump labeled China a currency manipulator and announced new 10%
tariffs on $300 billion worth of Chinese goods https://www.spglobal.com/
platts/en/market-insights/latest-news/oil/080119-us-to-impose-10-tariff-on-
3... 阅读全帖 |
|
s**w
发帖数: 499 | 46 https://www.forexfactory.com/news/946992-are-foreign-companies-really-
leaving-china-in-droves
President Donald Trump, in defending his trade war with China, has yet again
let his Twitter fingers get ahead of reality. He tweeted in late August that
“China wants to make a deal so badly. Thousands of companies are leaving
because of the Tariffs. They must stem the flow.” This supposed exodus of
foreign firms is another element informing his view that China is under
increasing economic pressure and... 阅读全帖 |
|
x****d
发帖数: 2239 | 47 https://www.zerohedge.com/health/man-behind-global-coronavirus-pandemic
===============================================================
Because as it turns out, this is a job posting for the lab of Dr. Peng Zhou
(周鹏), Ph.D., a researcher at the Wuhan Institute of Virology and Leader of
the Bat Virus Infection and Immunization Group. Some more on Zhou's
background from the Institute (google translated):
He received his PhD in Wuhan Virus Research Institute in 2010 and has worked
on bat virus and ... 阅读全帖 |
|
u****n
发帖数: 7521 | 48 Featured comments:
‘Despite growing unemployment, despite ruinous private and public debt,
despite whole states risking bankruptcy, despite the federal government now
paying its bills with nothing but printed paper, Americans keep spending
like good times will roll forever.’
And that’s the problem with the average joe. They grew up being told they
could do anything they wanted with their lives. If it feels good it must be
right. They don’t want to hear the truth about ANYTHING negative if it
cou... 阅读全帖 |
|
s*********0
发帖数: 2045 | 49 Reddit上的Ask Me Anything，全文在这里（直播中）
http://www.reddit.com/r/IAmA/comments/kc1ze/iama_us_naval_offic
Wikipedia: "INS Delhi (D61) is the lead ship of her class of guided-missile
destroyers of the Indian Navy. She was built at the Mazagon Dock Limited in
Mumbai and commissioned on 15 November 1997. This class is among the largest
warships to be designed and built in India.[2]"
Their engineering practices were abysmal. No undershirts, no steel-toed
boots - they wore sandals - no hearing protection in... 阅读全帖 |
|
a****t
发帖数: 7049 | 50 I think in the realm of economics, the government has exerted far too little
control. The issue with the existing control methods is not the amount, but
that it is too capricious. It needs to be taken out of bureacrats' hands
and made more mechanical. I am a Keynesian in believing the government has
an extremely critical role in stabilizing large systems like the economy, by
setting initial conditions and path constraints, and dampening extremal
phenomena (or edge cases, if you will) like monopo |
|
