n******h
发帖数: 2544 | 1 【 以下文字转载自 Hardware 讨论区 】
发信人: neoflash (neoflash), 信区: Hardware
标 题: Dell Precision系列workstation风扇求助
发信站: BBS 未名空间站 (Sat Apr 21 20:51:48 2012, 美东)
主要是噪音问题，吵得受不了。
已经解决了10000转硬盘的问题，现在剩下的就是三大风扇：
CPU，MEMORY和CASE上的一个小风扇。
这三个风扇都是直接接在主板山的，接口是5个孔，Dell用了里面的四根线。如果不接
风扇，主板不能启动。
现在想问问大侠们，如何能够把风扇的转速大幅度降下来？ |
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x*y
发帖数: 364 | 2 I can use MPI_gather to gather integer and real, but I couldn't gather double
precision arrays.
The code for gather part is:
call MPI_gather(a,nipe,MPI_DOUBLE_PRECISION,b,nipe,
& MPI_DOUBLE_PRECISION, 0,MPI_COMM_WORLD,ierr)
I got the error when run the code as following:
p1_3410: (0.018301) xx_shmalloc: returning NULL; requested 4000048 bytes
p1_3410: (0.018301) p4_shmalloc returning NULL; request = 4000048 bytes
You can increase the amount of memory by setting the e |
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I***a
发帖数: 704 | 3 有谁用过Precision或者Synplify来综合FPGA的？
综合后的结果是以什么格式导入到Quartus或者ISE里的？
thanks. |
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c*******n
发帖数: 32 | 4 Hi,
I'm having problems with decimal precision in Mathematica. I am trying the
following command in Mathematica:
\!\(Plot[\((\(\(\ \)\((\(-19\) + c\^2 +
\@\(400\ c\^2 + \((\(-19\) + \
c\^2)\)\^2\))\)\)\/\(c\^2\ \((181\[InvisibleSpace]
+ c\^2 + \@\(400\ c\^2 + \
\((\(-19\) + c\^2)\)\^2\))\)\))\), {c, 0.0001, 0.001}]\)
(Try copy and paste it into Mathematica, if that doesn't work...
paste first into Notepad and delete the 5 extra weird characters at the
beginning and then copy that into Mathemati |
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l***o
发帖数: 5337 | 5 需要抽样估计一个系统的precision和recall。第一感很简单，但仔细想来有很多麻烦
。现在population中有很多class, 每个class中有若干element，每个class的大小差很
多，很大部分是singleton（只有一个element）。问题：
1.应该把class还是element当作抽样unit呢？
2.把样本交给人手工分析时，分析的scope是什么？比如说，只问某个cluster在样本中
是否有recall的问题，还是到population里去找？
谢谢指教！ |
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z*******n
发帖数: 1034 | 7 Inmarsat offers airlines free global tracking to prevent another MH370
BY Daniel Cooper @danielwcooper May 12th 2014, at 4:38:00 am ET 35
After the disappearance of Malaysia Airlines flight MH370, the idea that a
plane could simply vanish in an age of information seemed impossible.
Satellite company Inmarsat is pledging to prevent the situation from
happening again, and will offer tracking services to every passenger airline
, free of charge. In the system, all planes would ping Inmarsat's track... 阅读全帖 |
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w*******y
发帖数: 60932 | 11 Walmart
Precision Edge Rotary 3-Head Shaver
$10 with free shipping
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w*******y
发帖数: 60932 | 16 On Link:
http://www.dailysteals.com
for $14.99, plus $4.99 Shipping/Handling:
New Schwinn Precision XT Heart Rate Monitor Active Trainer 9.0 Watch With
Chest Belt - Tells Time, Easy To Use, Programmable, Quick Touch Technology,
Calorie Counter, Stopwatch, Night Vision, Calendar, Water-Resistant
Seems decent for the price and the same as the Bowflex model that was on one
of the deal-a-day sites a little while back. The reviews are pretty good on
Amazon too: Link:
http://www.amazon.com/Schwinn-Act |
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w*******y
发帖数: 60932 | 22 TEAM RC 4.5" Remote Control Mini Helicopter, 3 Channel Infrared Remote
Control With 6 Way Precision Built-In Gyroscope, Metal & Plastic,
Multiplayer Up To 3 Helis, Red (HG251) $20.99 Shipped @Meritline:
http://www.meritline.com/rcteam-hg251-10-rc-helicopter-infrared
With Coupon Code MLCK261141020322AL1 limit 200 uses
Manufacturer Part # HG251
FEATURES
Full function 3 channel radio control (Left /Right, Forward/Backward, Hover,
and Lands)
Real life helicopter styling
3 channel digital proportio... 阅读全帖 |
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w*******y
发帖数: 60932 | 24 Tritton AX Pro Dolby Digital Precision Gaming Headset
Amazon Goldbox
Introducing the AX Pro - the most versatile gaming headset in the world. The
AX Pro features hardware-based Dolby Digital decoding and eight independent
speakers to deliver true 5.1 surround sound. Communicate over Xbox LIVE and
the PlayStation Network with seamless integration. Adjust game volume
independently of chat volume, and adjust independent sound fields through
the backlit in-line controller. For the audio or movie ent... 阅读全帖 |
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w*******y
发帖数: 60932 | 25 Meritline
Precision Ceramic Thrum Scissor
$0.99 with code MLCKXFHUER0503NL1
Wilderness Survival Flint / Fire Starter
$1.49 with code MLCKXFHUER0503NL1
Camera & Camcorder Flexible Mini Tripod:
http://www.meritline.com/camera-camcorder-tripod-986---p-34048.
$0.74 with code MLCKXFHUER0503NL1
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w*******y
发帖数: 60932 | 27 Meritline
2-pack 90 Degree SATA Data Cable
$0.80 with code MLCK9F30NL1
Microphone For Multimedia And Notebook:
http://www.meritline.com/notebook-microphones---p-37744.aspx
$0.69 with code MLCK9F30NL1
High Precision Anti-Static Stainless Steel Tweezers
$0.59 with code MLCK9F30NL1
free shipping
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w*******y
发帖数: 60932 | 28 Meritline
2-pack 90 Degree SATA Data Cable
$0.80 with code MLCK9F30NL1
Microphone For Multimedia And Notebook:
http://www.meritline.com/notebook-microphones---p-37744.aspx
$0.69 with code MLCK9F30NL1
High Precision Anti-Static Stainless Steel Tweezers
$0.59 with code MLCK9F30NL1
free shipping
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g******y
发帖数: 2517 | 30 Logitech Optical Gaming Mouse G400 with High-Precision 3600 DPI Optical
Engine (910-002277), 折扣30%
http://amzn.to/z3ogGr |
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w*******y
发帖数: 60932 | 32 Meritline has
1 Pack High Precision Anti static Stainless Steel Tweezers (Black) (248-586-
001):
http://iway.org/9575511
for $0.59 + FS after using Coupon Code: MLCK516JNL1
1 Pack Mini Wireless Bluetooth v2.0 USB 2.0 Adapter (192-102-001):
http://iway.org/9575521
for $0.95 + FS after using Coupon Code: MLCK516JNL1
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w*******y
发帖数: 60932 | 33 Dell Outlet Business:
http://iway.org/9613551
just sent out new coupons. They expire 5/28/12.
15% off any Latitude laptops: QVST3HCJXS2ND$
20% off any Dell Outlet Dell Precision Laptop or Desktop: G3CH$RNNXMSPBW
15% off any Dell Outlet Vostro Laptop or Desktop: ?WSHB6NZX9$S9J
20% off any Dell Outlet OptiPlex Desktop: N5JTTSRQ22F?LR
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c*********7
发帖数: 7607 | 35 Item Number Quantity Item Description
225-0382
1 Dell Mobile Precision M4600
317-6074
1 Intel Core i7-2720M Quad Core 2.20GHz 6MB, Dell Mobile Precision
M4600/M6600
317-6489
1 MOD,DIMM,2GB,1333MHZ,DDR3,1X2G
331-2809
1 Tech Setup Guide, English, Dell Mobile Precision
331-2169
1 Documentation (English/French), Dell Latitude E-Family/Mobile
Precision
331-1249
1 Internal Backlit English Keyboard, Dell Mobile Precision
320-1911
1 ... 阅读全帖 |
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f**d
发帖数: 768 | 36 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
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i**h
发帖数: 424 | 37 上周拿到一台9560，公司买的。试用了三天。
公司的打算是作为主力机替代原先的Precision 7710（嫌太贵太大）。我这台算是高配
，7700HQ/32GB/1TB，MSRP~$2500。价格上看比类似配置Precision 7710便宜1500以上
，比类似MBP15便宜近1000。
比17" Precision轻了许多。没有直接对比，估计比MBP15要重。正面看起来很薄，应该
是机身造型的错觉。外观很现代，很接近MBP。完全没有Precision 17那种粗笨的感觉
。屏幕、键盘、手托、触板等和XPS 13感觉几乎完全一样。值得一提的是触摸板的操作
感觉已经和MBP很接近了。支持禁用右击用双点代替，一点程度上解决的Windows的频繁
右击问题（因为右键的位置非常拗手）。打字的时候触摸板目前还没有发生误击的情况
。键盘的键程略短（相比Precision），但比最新的MBP好。我个人可以接受。摄像头的
位置很怪（因为无边屏幕的缘故）。不过反正我也不用。喇叭音量比Precision小很多。
CPU是7700HQ 2.8GHz。指标和原来Precision的6910HQ差不多。三级... 阅读全帖 |
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g****g
发帖数: 1828 | 38 In probability theory, the normal (or Gaussian) distribution, is a
continuous probability distribution that is often used as a first
approximation to describe real-valued random variables that tend to cluster
around a single mean value. The graph of the associated probability density
function is “bell”-shaped, and is known as the Gaussian function or bell
curve:[nb 1]
f(x) = \tfrac{1}{\sqrt{2\pi\sigma^2}}\; e^{ -\frac{(x-\mu)^2}{2\sigma^2}
},
where parameter μ is the mean (location of the pe... 阅读全帖 |
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l****z
发帖数: 29846 | 39 The Two Lefts
By Steven Plaut
It is impossible to understand politics in the world today without grasping
the fundamental fact that there exist two different lefts. I propose that
the two be referred to by everyone as the Stupid Left and the Satanic Left.
The two are very different, although they work together. People who are
part of the first are simply stupid people. People who are part of the
second may in fact be quite shrewd, but are evil and nefarious. There is no
third type of leftist... 阅读全帖 |
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m******v
发帖数: 66 | 40 不是自己配机器，也不太懂，抛开价格，那个更适合计算，处理数据
1
Base Unit: Dell Latitude E6410 (224-7936)
Processor:
Intel Dual Core vPro i7-620M, 2.66GHz, 1066MHz 4M L2
Cache, Latitude E6410 (317-8775)
Memory: 8.0GB, DDR3-1066 SDRAM, 2 DIMM for Latitude (311-3176)
Keyboard:
Internal Backlit English Keyboard, Dell Latitude E
(330-7359)
Keyboard:
Documentation (English) Latitude E-Family/Mobile
Precision (330-1652)
Video Card:
512MB NVIDIA NVS 3100M with ExpressCard, Dell
Latitude E (320-8795)
Hard Drive:
500GB Hard Drive 9.5M... 阅读全帖 |
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m******v
发帖数: 66 | 41 【 以下文字转载自 ComputerGraphics 讨论区 】
发信人: matrixzv (独行侠), 信区: ComputerGraphics
标 题: 看一下那个配置更适合处理数据
发信站: BBS 未名空间站 (Thu Oct 14 20:41:00 2010, 美东)
不是自己配机器，也不太懂，抛开价格，那个更适合计算，处理数据
1
Base Unit: Dell Latitude E6410 (224-7936)
Processor:
Intel Dual Core vPro i7-620M, 2.66GHz, 1066MHz 4M L2
Cache, Latitude E6410 (317-8775)
Memory: 8.0GB, DDR3-1066 SDRAM, 2 DIMM for Latitude (311-3176)
Keyboard:
Internal Backlit English Keyboard, Dell Latitude E
(330-7359)
Keyboard:
Documentation (English) Latitude E-Family... 阅读全帖 |
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d****n
发帖数: 12461 | 42 ☆─────────────────────────────────────☆
xiaoxiaoren (可爱小宝宝) 于 (Sat Aug 18 20:23:47 2012, 美东) 提到:
本子一用就是6年，vendor还赚什么钱啊？
现在别的不要比，只要把你们dell啦，hp啦，beat掉，就行了。
现在比来弄我强的本子还真是不多，
国内的神州也许算一个，便宜，配置高，service好，据说免费扫灰+免费加油。
当然了，商务精英需要每隔3个月去保养，也就是joke了。
☆─────────────────────────────────────☆
baal (白日梦) 于 (Sat Aug 18 21:11:44 2012, 美东) 提到:
我看现在的T系列不如latitude
☆─────────────────────────────────────☆
vMars (vMars) 于 (Sat Aug 18 21:28:00 2012, 美东) 提到:
dell，hp也分三六九等，高端的型号一点不差，就是被低端的毁了名声而已
具体到型号的话，W... 阅读全帖 |
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t**x
发帖数: 20965 | 43 The Mitutoyo Case: Will Japan Learn from Its Mistakes or Repeat Them?
Introduction
In the last few years, a number of Japanese companies have been implicated
in export control violations that have highlighted deficiencies in Tokyo's
ability to control the spread of sensitive dual-use technologies. One of the
most prominent and egregious cases is that of the Mitutoyo Corporation, a
leading precision measuring device manufacturer. The charges in this case
revolved around the illegal transfer of fi... 阅读全帖 |
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j***n
发帖数: 3786 | 44 加州天气还是很热，想出去打枪都难，闷在家里研究战术装备了。因为经常跟着洛杉矶
的JCSS出去练CQC，所以对战术装备还是有点研究的。有什么问题，大家近来聊聊，如
果自己有的，拿出来晒晒~~~
下面这位是国内的，枪是BB的，但是装备是真的。他这套东西，我在美国买都嫌贵，人
家在国内非收集齐了.
CRYE PRECISION CAC 作战背心(GEN3)
CRYE PRECISION Y 型背带
CRYE PRECISION 腰封
CRYE PRECISION 棒球帽
CRYE PRECISION 短袖
CRYE PRECISION 战斗服 战斗裤
CRYE PRECISION 营地裤
PROPPER 防火 阻燃 版营地裤
PROPPER 商业版 营地裤
EMDOM M4 弹夹包
EMDOM 回收袋
EMDOM T扣
ESSTAC 对讲机包
ESSTAC 杂务包
HSGI 流弹包双连
HSGI 手雷包
HSGI 手枪弹包
HSGI 腿板
HSGI 棒球帽
FAST MAG 3
OPS 轻型头盔
GENTEX 头盔
TAD 斑德拉胸挂
TAD EDC |
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q*******n
发帖数: 20306 | 45 这则消息有趣：
美军和土军合伙设埋伏，意图在俄罗斯的苏－２４在飞经土耳其领空的那几秒时间里把
它击落，事先把一切都计算安排好了， 只等着苏－２４掉进布置好了的陷阱里。
但土军的两架Ｆ１６迟到了两分钟，导致到场时苏－２４已经飞离了土领空。
而Ｆ１６电脑上事先设定的射击命令没被及时取消，仍然发射，击落了已经在叙利亚领
空的苏－２４。
美土导演的这出戏，虽经精确计算，出了点意外演砸了，误送俄罗斯一个道德制高点。
A U.S. Air Force Boeing E-3 Sentry AWACS plane took off on 24 November from
the Preveza airbase in Greece. A second E-3A of the Saudi Arabian air force
took off from the Riyadh airbase. Both planes were executing a common task—
determining the precise location of Russian aircraft. It is they th... 阅读全帖 |
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p*******e
发帖数: 3 | 46 Scientist / Senior Scientist, Next Generation Sequencing
OncoDiagnostics Technologies - San Francisco, CA
Job ID: 00001
Who We Are
OncoDiagnostics Technologies is a Silicon Valley-based biotech start-up
company focusing on precision diagnostics and medicine in cancer and other
serious illnesses. We aim to provide innovative non-invasive diagnostic
tests to enable precision medicine. At OncoDiagnostics, we believe that
people are our most vital assets and we are dedicated to creating a great
plac... 阅读全帖 |
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r****y
发帖数: 1437 | 47 For single precision, the machine precision is about 1e-7. Your result
is correct within machine precision.
For double precision, if you explicitly use 2.0D0, 1.0D-4. You will
get higher precision than single precision. If just 2.0, then your compiler
might convert it to 2.0000011111.
Different compilers can be a problem as well. Recently I have a code
working perfectly on SGI, Sun UNIX, Linux gnu compiler, but Linux PGI compiler
will give me a wrong answer. |
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T***4
发帖数: 4 | 48 【 以下文字转载自 Returnee 讨论区 】
发信人: Tier4 (noname), 信区: Returnee
标 题: 北京航天控制仪器研究所海外人才引进公告
关键字: 北京航天控制仪器研究所
发信站: BBS 未名空间站 (Tue May 17 20:21:16 2016, 美东)
北京航天控制仪器研究所“海外人才”引进公告
一、单位简介
北京航天控制仪器研究所成立于1960年1月，是中国主要先进精密光机电技术研制生产
单位之一。我们的使命是“以互相学习、精诚合作、和谐发展、实现共赢”的精神，与
国内外同行、社会各界携手共进，为推动先进精密光机电技术的发展与应用而不懈努力。
北京航天控制仪器研究所大力发展四个专业化产业项目，包括动中通特种通讯设备产业
、转台及运动测试设备专业、载荷及稳定技术产业和光纤传感及物联网技术产业。北京
航天控制仪器研究所先后荣获国家技术发明奖、国家科技进步奖、国防技术发明奖、中
国专利金奖等部级以上科技成果300余项，已拥有包括国际发明专利在内的授权专利160
余项，软件著作权多项，负责编制国家军用标准50余项。北京航天控制仪器研究所拥有
永定路工... 阅读全帖 |
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r*******g
发帖数: 1335 | 49 实在等不及了，跳了E5510，一共连税800
这样的配置搁到deal好的时候大概多少钱？
1 317-5729 Latitude E5510, Intel Core i7 640M, 2.80GHz,
1066MHz 4M L2 Cache
1 330-5874 Intel Core i7 Processor
1 317-3590 4.0GB, DDR3-1333 SDRAM, 2 DIMM for Latitude
1 330-1652 Documentation (English) Latitude E-
Family/Mobile Precision
1 330-7773 Internal English Keyboard Single Pointing,
Dell Latitude E5410/E5510
1 320-8889 Express Card without Modem, Dell Latitude
E5510
1 342-0479 250GB Ha... 阅读全帖 |
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