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全部话题 - 话题: rms
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D**********s
发帖数: 3139
1
来自主题: HiFi版 - Yamaha RV573 如何
他说的不对,有的小功放non-repetitive peak current比大功放高好几倍,说到底还
是瞬态不失真。比如有一个瞬间,奇怪的音色导致某种喇叭的电抗和效率突然降低,功
放是否还能平稳的输出。
看一个功放好不好,RMS power是其中一个项目,瞬态更重要。但是像看电影这种持续
有大输出要求的场合,RMS功率高当然对于功率耗散提高效率提高可靠性都是保障,影
院总体还是越高越好。

get
amp
volume
drive
j********b
发帖数: 565
2
来自主题: HiFi版 - 音响setup求教
說說我的想法,有關subwoofer的:
1.power output,Receiver's max and speaker' rms(均方根值)是不一樣的概念,
max is higher than rms, and speaker 阻抗8ome也使功放的對應output低一些。
你的subwoofer是自帶功放的powered sub,所以跟receiver的output完全無關的。黃色
部分兩個分別控subwoofer的聲音大小(level),和分頻點(lowpass)即是subwoofer從
多低的音頻開始工作,可以從100hz開始,按自己的感覺向兩邊調到滿意。
2.估計L和R是內部叠加的。一頭接在receiver背板左上方的subwoofer preout(功放級
之前的信號,所以和receiver的output無關的),另一頭可以接一個rca spliter,再接
到L,R。
3.紅色部分是另一接法,從receiver的speaker out接subwoofer,你不用的。
J******1
发帖数: 351
3
如果功率不够,清推荐一款吧,我看这个RECEIVER很好用,网络,IPAD也可以, 网上评
价也很好
receiver:5-channel powerful surround sound 115W per Channel
http://www.amazon.com/gp/product/B00B981F2O/ref=ox_sc_act_title
中置音响:RMS Power Range - Amplifiers175 watts
http://www.amazon.com/gp/product/B00009WBYL/ref=ox_sc_act_title
主音响(1对):Power Handling: 150W RMS / 600W Peak
http://www.amazon.com/gp/product/B003XRD9TG/ref=ox_sc_act_title
低音炮:Powerful 400-watt amplifier
http://www.amazon.com/gp/product/B00166ZFSO/ref=ox_sc_act_title
n********n
发帖数: 529
4
旧的前几天就卖掉了,260卖的,还挺顺利。原来是RF7呀, 250W RMS / 1000W Peak,
那我建议上个 x2200w或者x3200w,这两个都带pre-out,剩下的钱买个 Emotiva xp-2
或者xp-5啥的。我上个月买了个XP-2,70lb,300 watts RMS per channel @ 8 ohm
(0.07% THD)。当然不差钱就直接上最好的receiver。:)
p****u
发帖数: 52
5
这方面小白一个,发包子请教各位。
准备搞一个简单的k歌系统自己在家里自娱自乐,当然大多时候音响用来看电影。现在
有一个denon的5.1 AV receiver, manual上指标是75w RMS @ 8ohm, input
sensitivity 200mv;
根据版上的推荐进了一个zed 10fx. manual上output参数是0dbu nominal, +21dbu max
. 我当然不会到max,把话筒调了一下能保证吼到最大那个led红灯不亮,也就是最多最
多 + 9db.
我的问题就是:不考虑进新设备,av receiver的电平应该如何设定才能保证不
clipping? 我知道这主要还是靠听,但是我怕开party人多了唱high了都顾不得了所以
想预先设定好,保险一点。
不知道我下面的计算是不是有问题(或者本身逻辑就有问题):
0dbu -> 0.775V, + 9db -> 10^(9/20) * 0.775 = 2.18V -> mixer最大输入电压。
20*log10(0.2/2/18) = -20.74. 就是说receiver 电平设定到-20db左右可... 阅读全帖
l******n
发帖数: 9344
6
同意你RMS是音箱连续工作能承受的功率,但是还有PMPO.PMPO是音箱可以到的最大短时
间功率,不能长时间使用。长时将在RMS下工作,理论上应该是没有问题的。当然实际
上因为某些器材的材料或者质量,可能是达不到这个标准。
我关心的主要是功率匹配的问题,如果你receiver 50w,那你买100w的speaker就是浪
费,因为你发挥不出100w的效果。反过来,如果你买个200w的speaker,那你就不能买
只能输出50w的receiver。

headroom
l******n
发帖数: 9344
7
同意你RMS是音箱连续工作能承受的功率,但是还有PMPO.PMPO是音箱可以到的最大短时
间功率,不能长时间使用。长时将在RMS下工作,理论上应该是没有问题的。当然实际
上因为某些器材的材料或者质量,可能是达不到这个标准。
我关心的主要是功率匹配的问题,如果你receiver 50w,那你买100w的speaker就是浪
费,因为你发挥不出100w的效果。反过来,如果你买个200w的speaker,那你就不能买
只能输出50w的receiver。

headroom
r*s
发帖数: 9
8
来自主题: JobHunting版 - C#/Java developers wanted in bay area
The company www.rms.com has multiple openings for all levels of c#/java
developers. The company is in bay area, ca. It has the biggest market
share in risk modeling.
All positions require solid understanding of computer science foundations.
All candidates need to be self starter to learn new technologies.
The senior positions requires 5+ years professional development experiences
using C#/Java on Windows or Unix environment.
Experiences on Unix development is a big plus.
Good understanding of... 阅读全帖
r*s
发帖数: 9
9
The company www.rms.com has multiple openings for all levels of c#/java
developers. The company is in bay area, ca. It has the biggest market
share in risk modeling.
All positions require solid understanding of computer science foundations.
All candidates need to be self starter to learn new technologies.
The senior positions requires 5+ years professional development experiences
using C#/Java on Windows or Unix environment.
Experiences on Unix development is a big plus.
Good understanding of ... 阅读全帖
F***Q
发帖数: 6599
10

you selectively ignored the "Power output" listed under the audio system.
the power you quoted is for the blue-ray player.
people only talk about two power metrics in audio systems, peak power and
RMS power. 1000W peak power is very common these days. Even my computer
speaker can deliver 400W peak power and 200W RMS power.
F***Q
发帖数: 6599
11
来自主题: Living版 - 猜猜这个600瓦的音响多少钱吧

600W是peak,RMS Wattage才200W
与其买这种没有牌子的,还不如买sony的低端5.1:
http://www.newegg.com/Product/Product.aspx?Item=N82E16882105685
从spec上看,也是RMS 200W,而且还可以放dvd
s******p
发帖数: 421
12
都跟RMS似的50多岁老光棍有什么意思。
有个手艺,赚钱养娃就足够了。
BTW rms还在水木征婚过,这么个全世界知名的男人竟然没找到。连五道口的黑哥哥都
不如。
J******1
发帖数: 351
13
【 以下文字转载自 HiFi 讨论区 】
发信人: JL311811 (LEON), 信区: HiFi
标 题: 帮我看看我的组合对不对,RECEIVER功率是不是小了
发信站: BBS 未名空间站 (Thu May 22 00:35:14 2014, 美东)
如果功率不够,清推荐一款吧,我看这个RECEIVER很好用,网络,IPAD也可以, 网上评
价也很好
receiver:5-channel powerful surround sound 115W per Channel
http://www.amazon.com/gp/product/B00B981F2O/ref=ox_sc_act_title
中置音响:RMS Power Range - Amplifiers175 watts
http://www.amazon.com/gp/product/B00009WBYL/ref=ox_sc_act_title
主音响(1对):Power Handling: 150W RMS / 600W Peak
http://www.amazon.com/gp/product/B003XRD9... 阅读全帖
t**s
发帖数: 156
14
那边没人搭理。请问这里的大牛知道吗? 谢谢!
【 以下文字转载自 HiFi 讨论区 】
发信人: tlfs (谁要gc), 信区: HiFi
标 题: 新手请教卡拉ok 功放和音箱的问题
发信站: BBS 未名空间站 (Sun May 8 16:01:57 2011, 美东)
请问yamaha rx-a700 receiver 和 klipsch rb-51II 音箱能不能用来接电脑和mixer唱
卡拉ok? 看了一些文章说receiver和音箱功率太小的话,唱卡拉ok时可能会烧坏。请问
这套配置的功率够了吗?
查了一下技术指标:
yamaha rx-a700 receiver: Output Power: 630 watts (90w x 7 RMS)
klipsch rb-51II:75W RMS / 300W Peak
谢谢!
O*******e
发帖数: 6055
15
据说好像是 麦克抗压大 = 录音不容易过载,可能我理解有误哈。
俺的理解,就是指麦克的振膜能承受的最大强度的声源冲击而不导致录音失真。比如说
录鼓啥的。这里强调的是振膜物理上的handle能力,不是指录音的输入音量。
而且,SPL值一般在130 - 150之间,这个是人声根本不可能达到的。
虽然超过了这个SPL值也会导致削顶,但这个是指音源的音量超过振膜能力导致的,和
输入音量高导致的过载不是一回事。
所以,SPL貌似和录音是否过载木有关系哇?尤其是录人声的时候,怕过载也只能是调
低输入音量了。
“The maximum SPL the microphone can accept is measured for particular
values of total harmonic distortion (THD), typically 0.5%. This amount of
distortion is generally inaudible[citation needed], so one can safely use
the microphone at this SPL with... 阅读全帖
j******h
发帖数: 3904
16
来自主题: PhotoGear版 - 请问版上有EE的吗?
你的FG输出太大了
1V的输出如果50db gain不变的话输出得有2000 watts, ENI 2100L最大功率输出才
100watts.
用FG输出10mV RMS 的正弦波试试,输出应该是3.2V RMS, 如果AMP work的话
j****c
发帖数: 19908
17
来自主题: PhotoGear版 - 最近三个月拍的照片
还是Wizard nebula (NGC7380). 上个月拍了十小时的Ha +RGB,前天晚上跑出去又拍了
八小时O3 + Ha,第一次尝试哈勃望远镜照片的颜色处理方法,所谓的哈勃调色板
Hubble palette
话说前天晚上风真大,吹得车子都在晃,跟踪误差rms有两个pixel,完全不能用。后来
我把车子调转方向,紧贴着望远镜挡着风,rms error降到0.6 pixel,勉强可以用了
d*********2
发帖数: 48111
18
不是创始人, 但是重要的一个早期收购者
Isidor Straus (February 6, 1845 – April 15, 1912)—a German Jewish American—was co-owner of the Macy's department store with
his brother Nathan. He also served briefly as a member of the United States
House of Representatives.[1]. He died with his wife, Ida, as a result of the
sinking of the passenger ship RMS Titanic.
这个死的时候才47岁。
Benjamin Guggenheim (October 26, 1865-April 15, 1912) was an American
businessman. He died aboard RMS Titanic when the ship sank near Cape Race,
New
m*****e
发帖数: 4193
19
He may appear to be rude, but he is normally right, and he always backs
himself up and be consistent over the years.
Same as RMS, except RMS is always an asshole without actually being rude.
S*A
发帖数: 7142
20
来自主题: Linux版 - Google go 还挺不错的
好吧,RMS 是 CS 科班,但不是 compiler 背景的。
RMS 比较适合做精神领袖,技术挂帅上品味不是很行。
看看 GNU Coding Style. 非常不爽。
那个 Hurd 搞了半天难产最后被 Linux 抢走了。
Gcc 内部结构长期很糟糕,政治斗争太多。被 llvm 严重赶超,
照这个速度,以后地位不保。
我觉得做 Open source maintainer 技术上最难得,最难学到
的是品味。这个品味的上限基本上是天生的。
我发现比较好的maintainer 都有比较包容的心态。比较偏激的
都做不好。太面的也做不好。
S*A
发帖数: 7142
21
The only people I know actually does that is RMS.
X is not GPL. RMS only use free software, (free speech not beer).
Is Linus hard core enough to you? Linus use the GUI as well.
Even though, he maintain his own micro emacs editor.
d****i
发帖数: 4809
22
看看阿里的技术大拿怎么客观看待开源和闭源的:
*************************************************
陈皓:关于开源和闭源软件我个人Naive的看法
对开源软件来个可能会引发争议的观点:对于绝大多数的软件产品来说,1)闭源的软
件产品的技术含量要比开源的要大得多。2)大多数的开源软件都在抄闭源的商用软件。
首先,我先表达一下开源软件的伟大,并向开源的人们致于我最真诚的敬意。但,即使
这样,我们也要很客观的承认大多数开源软件是存在大量问题的。就像我这个人主观上
并不喜欢微软和 IBM,但是我必需要承认,没有微软和 IBM,计算机这个行业不会有今
天这样的爆炸。(插曲:我 94 年上大学选的专业是计算机科学,当时很多人都觉得计
算机专业是一个 ZB 的专业,因为几乎没有哪个企业在用电脑,但我幸运的是 95 年的
时候微软出了 Win95,Sun 出了 Java,然后互联网极度膨胀,才导致我选的专业最终
变得很火)。
至于我说的这两句话,我知道是有争议的,尤其是我用了“抄”,在此请原谅我用词不
当,像从事开源的朋友道歉。这个“抄”其实是“模仿”的意... 阅读全帖
p****s
发帖数: 3184
23
来自主题: Programming版 - 这几天试了一下linux c++ IDE
原始社会?
gdb里的print可以打印任何C/C++的表达式,包括function calls。如果你够crazy,可
以调用你正在调试的function。你那M$V$就是发展到共产主义也没RMS在gdb原始设计时
就想到的这样强的功能。
eye candies多倒是M$砸人工man-years就能制造出来的一堆花里胡哨的玩意儿,原始设
计走叉了道以后就难改了,M$的东西基本都是这么回事,正经事玩不转--对C表达式的
理解、对进程管理(attach)的支持、对网络和嵌入式系统(远程调试)的支持都差gdb
一大截。
反过来讲,RMS如果让gdb放弃GPL,被某个大公司收购,投入1000个人年的人工做eye
candies,没有什么V$的图形界面功能是不能在gdb里做的。
c********1
发帖数: 5269
24
来自主题: Programming版 - Linus Torvald有多少钱?
RMS 不想赚钱. and anti software business.Some people say he is insane.
linus; Not for money, 想赚钱. Pro software business.
http://www.celebritynetworth.com put Linus in richest-businessmen category.
businessmen == 想赚钱. Right?
http://www.celebritynetworth.com put RMS in en category
c****l
发帖数: 1086
25
I'm afraid you are wrong,lanceandfei. It's true that there are new new
arrived neurons in mammalian OB throughout whole life. However these new
neurons are generated in SVZ, then migrate through RMS to OB.
One pretty recent interesting finding is this SVZ-RMS-OB neurogenesis also
exists in human brain in which chain of neuron migration was thought to be
not present. (See cover paper of last week Science, groups from New Zealand
and Sweden)
Our lab is focusing on mechanism of tumorigenesis in bra
d*****l
发帖数: 8441
26
来自主题: EE版 - 请教加窗频谱归一化问题
您不会认为只有前沿的问题才能到这里来发问吧?也太高估俺了。我不过是文科生
求科普而已。
//
我说的是网上科普材料以及本版讨论的不多,不是说文献不多。要知道,这玩意儿应该
是60、70年代就快研究烂了,太成熟了、老文献又多,反而没有赶上互联网时代,
非得要去挖浩如烟海的老杂志或老文章才能够搞透彻的。要不然我干嘛到这个版来
求教呢?您老就跟俺多讲讲吧,
//
正如我一开始所说,教材里讨论的情况也确实是一样的--讲抑制谱泄漏的多、
讲谱线幅值准确性的少:
您所讲的"要少受邻居的影响"不就是我所说的"降低旁瓣"嘛,貌似一般教材里讨论的
也确实比较多啊,而关于如何"准确的表达真实谱线"这方面(包含了主瓣展宽的影响)
的讨论确实是比较少啊。
//
在下愚钝,说白了就是想知道一下频谱分析仪里面用没用归一化修正、以及如何用而已。
当然是说离散频谱了(隐含时域周期延拓了),说确切一点就是FFT。
//
具体例说,0.5Vrms, 1kHz的正弦信号,经过0dBFS/V的AD变换后成为数字信号,其
幅度峰值(peak-value)应当为0.707FS (Full-Scale),RMS level应当为-... 阅读全帖
s******e
发帖数: 82
n*****n
发帖数: 3123
28
来自主题: Statistics版 - 谁有办法弄到这个啊
别惦记了,假的。就是链接的那个
http://biostat.mc.vanderbilt.edu/twiki/pub/Main/RmS/rms.pdf
w*******y
发帖数: 60932
29
Fry's has the Logitech z520 on sale this morning for $29.99 after a $60 mail
in rebate. Pretty good deal.
Here's the details:
Small package. Big sound.
360-degree sound: Also known as omnidirectio nal acoustics, 360-degree
sound helps project sound evenly in all directions, giving you a great
listening experience throughout the room.
Amplified two-way design: Immerse yourself in rich, accurate sound. Perfect
for music, videos, and games.
26 watts (RMS) of power: Loud enough for a party. And de... 阅读全帖
w*******y
发帖数: 60932
30
The powerful Amadeus Home Theater Surround Speaker System was designed to
work with any audio device that supports 4.1 surround speaker systems. The 4
satellite speakers were built with 3.5" full range driver units and the
subwoofer was built with 6.5" driver unit in a large and solid wooden
enclosure (29cm x 26cm x 21cm) for high fidelity audio performance!
General SPEC
Configuration
4.1
Satellite RMS Power /ea
16 w
Subwoofer RMS Power
35 w
Features
Features
Input Sensitivity:
... 阅读全帖
w*******y
发帖数: 60932
31
At Link:
http://www.cowboom.com/
It's not the best brand, but if you're looking for something cheap to
replace your broken unit, this is worth it.
Jensen MP1313 13Wx4 In-Dash CD Deck with MP3 Playback
This in-dash deck features a front auxiliary input for the connection of an
MP3 player and 24 radio presets so you can easily find your favorite
stations. The detachable faceplate provides increased security.
Features
13 watts x 4 channels RMS power
For powerful sound.
CD, MP3 and WMA playback form... 阅读全帖
w*******y
发帖数: 60932
32
Link:
http://www.amazon.com/GOgroove-SonaWAVE-Portable-Speaker-Rechar
#productPromotions" rel="nofollow" target="_blank" onclick="_gaq.push(['_
trackEvent', 'thread', 'click', '3369056 - gogroove-sonawave-portable-stereo
-speaker-system-with-rechargeable-battery-for-19.99-free-shipping-w-amazon-
prime']);">http://www.amazon.com/GOgroove-So...Promotions
Retail $59.99
Amazon $34.99
Now $19.99
GOgroove SonaWAVE Portable Stereo Speaker System with Rechargeable Battery
for MP3 Players, Tablets, Lapto... 阅读全帖
w*******y
发帖数: 60932
33
It is $165.29 - 15% shopping discovery = $140 + tax, free shipping or pick
up in store.
BIC F12:
http://www.sears.com/shc/s/p_10153_12605_05794629000P?sid=IDx20
BIC America Formula F-12 - Subwoofer - 150 Watt - black
Powered subwoofer incorporates a high current 475-watt peak amplifier
designed by BASH technology in combination with a 12" injection molded long-
throw woofer. A patented BIC "Venturi" vent eliminates port noise which is
often heard from other subwoofers, especially when playing de... 阅读全帖
w*******y
发帖数: 60932
34
Crutchfield:
http://www.crutchfield.com/p_700KD10820/Kenwood-KDC-108-CD-Rece
has the Kenwood KDC-108 CD Receiver and Kenwood KFC-G1620 6-1/2" speakers
for $89.99 with free shipping and free installation gear. The closest price
for the KDC-108 is $58.72 from Sears:
http://www.sears.com/shc/s/p_10153_12605_SPM3201795302P?sid=IDx
. The closest price for the KFC-G1620 is $24.50 from Amazon:
http://www.amazon.com/Kenwood-KFC-G1620-inch-2-Way-Speakers/dp/
. These prices do not include tax, shipping ... 阅读全帖
w*******y
发帖数: 60932
35
Spotted this today...
Link:
http://www.sears.com/shc/s/p_10153_12605_05757509000P?prdNo=21&
JVC KDPKR3002 - CD Receiver with 2 pair of 6.5" Speakers
Available Online or In-Store Pickup
Product Description
Jam to your favorite tunes with this package that includes a full feature cd
receiver and 2 pair of 6.5" speakers.
Variable Color Illumination
Front Aux-in
Wireless Remote Control
MP3/WMA Compatible
20 Watts RMS x 4 (MOS-FET) 50W x 4 MAX
Line Output RCA (2.5V) Selectable Rear/Subwoofer Output
3... 阅读全帖
t**********l
发帖数: 24
36
来自主题: _robot版 - step motor的控制
驱动器,马达的选择与你的实际负载有关。
The driver I use for stepper control:
IM483 made by "IMS-Intelligent Motor Systems,INC "
Max Phase output current: 0.4A < RMS < 3 A
Max RMS peak = 4A
o***s
发帖数: 42149
37
铁达尼号撞冰山事件下月将满100周年,沉船原因却始终是个谜,但有消息指出,当时一名邮轮上的生还者,在获救后寄出一封手写信,描述船将撞上冰山时,船长疑喝醉。此传闻也打破船长史密斯牺牲小我奋勇救人的传说。
相关媒体报导内容指出,当时24岁的生还者爱蜜莉?理查(Emily Richards),带着2子搭上救生艇,才能存下来,但她的哥哥却难逃死劫,与其他人一同葬身大海。
遇难2天后,爱蜜莉在救援船上写了一封信回家,信中写道,她在浩劫发生前,曾看到史密斯船长在交谊厅喝酒,并将掌舵工作交给手下操控,她说:「这一切都是船长的错!」
铁达尼号沉船1百年之际,这封手写信和爱蜜莉抵达纽约后寄出的信件曝光。据悉,爱蜜莉家族保存这2封信长达75年,后来被收藏家买走,而这2封信也即将拍卖,预估约以2万英镑落槌。
拍卖商表示,这是一位女人失去挚亲后,亲手写下的说法,而其他的生还者都没看到船长当时于酒吧喝酒。
另外,为纪念铁达尼号沉船100周年,詹姆斯柯麦隆执导的电影「铁达尼号」,将推出3D版本,并于4月3日在全台上映。
泰坦尼克号(RMS Titanic)是一艘奥林匹克级邮轮,于1912年4月处女航时撞上冰山后... 阅读全帖
f****l
发帖数: 8042
38
来自主题: Military版 - 泰坦尼克号上的所有真实故事
看来翻译还是忠于事实的。
Traveling from Germany back to the United States, Isidor and his wife were
passengers of the RMS Titanic when, on April 14, 1912, it hit an iceberg.
Ida reportedly would not leave Isidor and refused to get in a lifeboat.
The officer filling up the boat told Isidor that he could get into the
boat with his wife, but he refused to before other men and instead sent
his wife's maid, Ellen Bird, into the boat. Ida refused to board the half-
full boat, saying "I will not be separated from
d*********2
发帖数: 48111
39
来自主题: Military版 - 国内女性的社会地位在走下坡路
你要是没留神上了RMS Titanic, 你就不会这么说了。
G******d
发帖数: 364
40
来自主题: Military版 - 德国才是真正的韬光养晦
it is true.
Hans-Peter Richter 2007, August
(German Peace Council)
Foreign Military Bases in Germany
Today there are 72 locations in Germany used by the US military Forces and
about 68,000 soldiers. The British Forces use 5 locations and have 25,000
soldiers in Germany. In the summer of this year about 8,500 soldiers will be
withdrawn from Germany and three basses will be given up. All this soldiers
have their home base in Germany. At no time all this soldiers are in
Germany, because always some... 阅读全帖
t******t
发帖数: 15246
41
“高NA浸没式曝光光学系统关键技术研究”、“极高精度光学元件与系统检测技术研究
”及“极紫外投影光刻关键技术研究”等项目,是国家下达的重大的科技专项任务(第
一期经费10亿元),其最终目标是掌握超大规模集成电路制造产业核心装备--DUV及EUV
投影光刻机曝光光学系统的研制与生产能力。
DUV及EUV投影光刻曝光光学系统是目前人类所能研制的最为复杂、最为精密的光学
仪器,其研制过程涉及到光学材料、光学设计、光学加工、光学检测、光学镀膜、光机
结构与光学装校等应用光学所有单元技术,且需将上述单元技术发挥到当前发展的极限
水平。
竭诚欢迎2009年优秀应届毕业生加入上述科研项目的研究团队,肩负历史使命,共
同迎接与完成国家与民族交付的这一极具挑战性的研究任务! 有志从事最尖端应用光
学研究的年青朋友们,来应用光学国家重点实验室重大专项锻炼与发展,将是实现你们
人生价值的最佳选择!
志存高远,心细如丝
——勇攀精密工程光学领域新高峰
长春光机所 李晶
拉面想必大家都吃过,但知道最细的拉面有多细么?创造吉尼斯记录之最细的拉面,可
以三十根同时穿过针眼。米上刻字,大家也都熟悉,在... 阅读全帖
t******t
发帖数: 15246
42
【 以下文字转载自 Military2 讨论区 】
发信人: thinknet (我是云), 信区: Military2
标 题: 中国超精密机床精度胜过日本
发信站: BBS 未名空间站 (Fri Nov 18 11:54:07 2011, 美东)
国内最顶级的是国防科技大学机电工程与自动化学院的精密加工实验室,很少公开,这
个是研究磁流变抛光(MRF)技术的。
国防科技大研制的KDRMF-1000 磁流变抛光设备,加工Ф200mm ,1:1.6 的K9 玻璃抛物
面镜,其面形误差小于λ/100(RMS),粗糙度优于0.5nm。图为KDRMF-1000 磁流变抛
光实验机床。
http://lt.cjdby.net/thread-1270225-1-1.html
我们的超精密机床,最大的问题不在精度,论精度日本人不是我们的对手,主要在于加
工零件的尺寸,以及产品产业化方面。
b***y
发帖数: 14281
43
来自主题: Military版 - 方励之的学术成就全记录
No. The search include his early works up to 1978. Here is the same list
sorted by year.
1) The Influence of Gravitation on the Vacuum State.
By Li-Zhi Fang.
Acta Phys. Sinica 27 ( 1978) 181-18.
2) THE STRUCTURE AND STABILITY OF THE ABNORMAL NEUTRON STAR.
By Li-Zhi Fang, Qin-Yue Qu, Zhen-Ru Wang, Tan Lu, Liao-Fu Luo.
Sci.Sin.22:187-198,1979.
3) Some Recent Developments in Astrophysics. (Talk).
By Li-Zhi Fang, A. Qadir, R. Ruffini.
In *Nathiagali 1980, Proceedings, Physics and Contemporary Needs... 阅读全帖
n**n
发帖数: 626
44
RMS uses a godson laptop.
x*****g
发帖数: 3463
45
来自主题: Military版 - 正确看待龙芯
你有什么理由怀疑他的可靠性?
RMS会用一个天天crash的机器吗?
f****m
发帖数: 7469
46
二战胜利后,苏俄因意识形态等原因转而支持共军。苏俄向共军提供了从德国缴获的
GMS-06型“扎古2”的技术资料,向共军转交了位于东北边远山区 的技术相对落后的日
军JMS-05型“扎古1”秘密生产基地,直接提供了部分RMS-06(苏联版扎古2)并帮助共
军建立了MS部队,该部在苏联远东地区 训练,在1946年5月四平战役之后,共军林彪部
陷入即将被歼灭的境地之时越境直接参战,自此开始了国军噩梦般的国共战争历程……
二、共军的逆袭
在得到了苏俄技术与资金的大力协助后,共军逆袭了!对,逆袭了!他们的步兵装
备了足以在1000米距离上击穿国军所有坦克正面装甲的小型米加粒子步枪,称之为“小
米加步枪”,但却无耻的解释为“部队只能吃小米,用步枪”
自此,国军装甲部队优势顿然消失,以致国军著名装甲兵专家、蒋公之次子蒋纬国不禁
感叹生不逢时。这位指点过巴顿,帮助美国创建了坦克部队的装甲精英遗憾的被淹没在
历史的潮流中,没能像远不如他的巴顿那样在战争史上写下浓墨重彩的一笔。
Y*******n
发帖数: 4646
47
请版主保留一会, 谢谢
【 以下文字转载自 Stock 讨论区 】
发信人: YourQueen (Her Highness), 信区: Stock
标 题: 我又来这里求牛人:谁会oracle retail etl script?
发信站: BBS 未名空间站 (Thu May 30 10:45:49 2013, 美东)
据说是oracle retail management system里的。
RETL scripts for performing ETL activities in the Oracle Retail Management
System (RMS)
谢谢!
n*****t
发帖数: 22014
48
来自主题: Military版 - 俺就是码工转化学的
硬件有极限,写底层的东西不考虑效率绝对不行,你这个函数可能每秒会被调用上千次
。另一个重要的问题是安全性,两样一麻黑半路出家的码农压根没概念。
真正 organic 的程界大牛,对效率简直到病态。RMS 2000 到上海,俺整他到交大演讲
,丫的电脑根本不用鼠标,用的软件尼玛前无古人后无来者。

★ 发自iPhone App: ChineseWeb 8.2.2
★ 发自iPhone App: ChineseWeb 8.2.2
w********h
发帖数: 12367
49
1931年死去的是弟弟
Nathan Straus (January 31, 1848 – January 11, 1931) was an American
merchant and philanthropist who co-owned two of New York City's biggest
department stores – R.H. Macy & Company and Abraham & Straus – before
giving away most of his fortune to various projects in Ottoman Palestine.
Isidor Straus (February 6, 1845 – April 15, 1912) was a German-born
American businessman and co-owner of Macy's department store with his
brother Nathan. He also served briefly as a member of the United S... 阅读全帖
l****o
发帖数: 5435
50
来自主题: Military版 - 这个靠谱么?泰坦尼克号真相
首富
John Jacob "Jack" Astor IV (July 13, 1864 – April 15, 1912), often dubbed "
Jack Ass" in the press,[2] was an American businessman, real estate builder,
investor, inventor, writer, lieutenant colonel in the Spanish-American War,
and a prominent member of the Astor family. In April 1912, Astor earned a
prominent place in history when he embarked on the ocean liner RMS Titanic,
which hit an iceberg four days into its voyage and sank in the early hours
of April 15. Astor was among the 1,514 peop... 阅读全帖
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