a********j
发帖数: 82 | 1 One of the songs in Virginia Harmony was the Isaac Watts hymn "There Is a
Land of Pure Delight", set to the anonymous folk tune "Harmony Grove". "
Harmony Grove" is now the tune most associated with the John Newton hymn "
Amazing Grace", and for many years Carrell and Clayton were credited as the
composers.
是Carrell 和 Watts 根据民歌改编的。那个贩奴人是词作者。 |
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l******t
发帖数: 490 | 2 解答：Allah為什麼有時候用複數代詞“我們”
The Quran, Allah and Plurality Issues (Sam Shamoun)
The Quran, much like the Holy Bible, uses plural pronouns for God even more
so than what we find in God’s true Word. Here are several examples:
This is part of the tidings of the things unseen, which We reveal unto thee
(O Apostle!) by inspiration: Thou wast not with them when they cast lots
with arrows, as to which of them should be charged with the care of Mary:
Nor wast thou with them when they disputed (the point). S... 阅读全帖 |
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a***y
发帖数: 19743 | 3 另外
双核Cortex A9 800Mhz或500Mhz耗电0.5watt
Apple A4大概是单核1Ghz
貌似苹果目前主推单任务所以单核比双核划算。
苹果之所以要用自己设计的ARM system on a chip芯片，一个重要原因就是省电。
所以可以预期Apple A4的耗电量大约就是0.5 watt以内了。
有评估认为苹果这个液晶耗电大约是2 watt
2.5watt的总功耗，25WHr的电池，也是10小时电池寿命。 |
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g****t
发帖数: 31659 | 4 我印象里ipod,iphone,ipod touch,mac book等标称的
电池时间好像一直都比较靠谱.他家是不是有什么特殊的充电技术之类的?
另外
双核Cortex A9 800Mhz或500Mhz耗电0.5watt
Apple A4大概是单核1Ghz
貌似苹果目前主推单任务所以单核比双核划算。
苹果之所以要用自己设计的ARM system on a chip芯片，一个重要原因就是省电。
所以可以预期Apple A4的耗电量大约就是0.5 watt以内了。
有评估认为苹果这个液晶耗电大约是2 watt
2.5watt的总功耗，25WHr的电池，也是10小时电池寿命。 |
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p********y
发帖数: 5044 | 5 忘了把air的充电器带回家了, 可以把pro的拿过来用吗 |
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A*******s
发帖数: 153 | 6 perf/watt, perf/mm2 只有在一定条件下才有意义。
就像一辆跑车，如果连到达目的地这个需求也无法满足，perf再高也是没有意义的。
手机里面，有太多东西比perf重要，其中watt的绝对值就比perf本身要高一个等级。
当然你可以说细分市场可能有不同要求，但总体来看，一个跑得流畅的系统所面对的用
户比一个能跑很牛逼分数但是其他不行的系统要多得多。 |
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i*********e
发帖数: 1010 | 7 【 以下文字转载自 PDA 讨论区 】
发信人: inFreespace (Long Island Ice Tea), 信区: PDA
标 题: 随便算算手机性能与系统优化iPhone6 S5 Note3 and Mate2
发信站: BBS 未名空间站 (Tue Sep 23 00:45:06 2014, 美东)
假设Anandtech的Benchmark是基本正确的，各机型工作电压类似。Browsing Battery
Life的Benchmark大概推算各个机型的效率
iP6 iP6+ iP5s SS S5 SS Note3
LG G3 Huawei Mate2
Battery Life (hour) 11.4 13.72 8.9 10.2 9.96
8.78 18.7
Battery capacity (mAh) 1810 2915 1570 2800 320... 阅读全帖 |
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d****n
发帖数: 12461 | 9 我觉得应该测整机的performance/watt，而且要分average和peak。那种单看
performance的没意义。例如一边放高清一边压mp3，然后用kill a watt看一下电脑用
多少电。然后只上网，看电脑用多少电。 |
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d********k
发帖数: 701 | 10 我一个MX revolution鼠标，充电有问题，有个网站说在充电底座上串联三个10ohm电阻
就可以。我试一下，确实好一些，可是用一会，电阻就开始高温发热。
我买的电阻是1/8 watts，有个youtube录像说他用 1/4 watts，都是10ohm。
请问这时候，电阻功率越大，发热越少吗？
谢谢 |
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d****n
发帖数: 12461 | 12 400w足够了。看这个
“I have an i7-930 overclocked to 3.6GHz, but it idles at 2GHz and the
voltage drops. Likewise, I'm running a single AMD Radeon HD 5870 instead of
a pair of GeForce GTX 580s. My idle consumption is 190 watts, which seems
high until you realize I have three screens connected to the 5870 that keep
its clocks up. Under the same load the BlackOps was tested with, my tower
only consumes 320 watts. ” |
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r******s
发帖数: 925 | 15 主要使用Linux，轻度运算，稳定第一,
挑了跳比较关心的配置，其他部分都是直接勾的review多而且好的
请各位看看有啥不合理的地方
Qty. Product Description Savings Total Price
1 ASUS P8Z68-V LE LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel
Motherboard with UEFI BIOS ASUS P8Z68-V LE LGA 1155 Intel Z68 HDMI SATA
6Gb/s USB 3.0 ATX Intel Motherboard with UEFI BIOS
Item #: N82E16813131773
Return Policy: Standard Return Policy -$7.00 Instant
$139.99
$132.99
1 HIS H467QR1GH Radeon HD 4670 1GB 128-bit DDR3 PCI Express 2.0 x16... 阅读全帖 |
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b*****u
发帖数: 445 | 16 Under the hood is a 460-watt power supply that Dell says is strong enough
for up to 225-watt graphics cards. |
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A*******6
发帖数: 760 | 18 My desktop monitor screen suddenly got vertical and horizontal lines (
monitor itself works well) and I want to change my graphic card. My desktop
has a DC power supply of 375W, but the new card I am interested in (Radeon
5450 1GB) requires 400W power supply. Since I do not play video games and
only watch videos, can I still buy and install this card even if my desktop
does not meet the 400W requirement? Thanks for your opinion. |
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g*****t
发帖数: 162 | 20 5450 难道不是入门显卡么？目测额定375W的电源应该毫无压力。 |
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D**a
发帖数: 757 | 21 5450 is low power, how the heck it require 400w? i have it on my htpc, with
3 hard drives, and my psu is only 250w |
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C*********n
发帖数: 122 | 22 When talking about PSU, they assume the customers are using damn
crappy $10 "400w" ones like the diablotek and logisys @newegg.
HD 5450 is about 20w@full load while 5w@idle. |
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m*********t
发帖数: 527 | 23 400w 。。。。。。tesla GPU 也就两百多瓦 |
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c******n
发帖数: 16666 | 24 没问题 但是看你机箱其他耗电部件多不多
一直满载的话 psu坏得很快 |
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a*o
发帖数: 19981 | 27 貌似最NB的是antec，每款都是效率贼高，standby 0w/3va，工作状态watt/va显示几乎
完全一样，就是说相位差损耗完全矫正了。ocz的一个600w的差不多牛，但是一个550w
的standby 3w/5va，工作状态va比watt高差不多10-15%的样子，也还行。
最烂的是一个几年前买的cooler master 500w的，尼玛80watt的时候va 140，简直就是
完全没有相位矫正，太坑爹了。用这款电源24x7的话一年idle下来电费都要多花60块钱。
看来24x7机器的电源钱真不能省，效率差一点点就够差价了。 |
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a***e
发帖数: 27968 | 28 According to DisplayMate, Apple had to bump up the backlight power draw from
2.7 watts on the iPad 2 to 7 watts on the new iPad.
不知道这个够不够解释高分屏功耗的问题
switching不是关键，丫要是IGZO就轻松回到2.7W就够了 |
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a***e
发帖数: 27968 | 29 网上实测的结果，一样的laptop,不同的CPU
Under full load in Prime95, the power consumption again increases by several
Watts, but the ratios remain unchanged. The 3 dual cores are similarly
efficient, whereas the i5-3320M draws about 5 Watt less energy than the i5-
3360M and the i7-3520M.
这几个都是一水的35W CPU.
说实话，俺不知道你的不同i7，i5跑不一样电压的印象是哪里来的
简单的工程问题，intel出来个ULV东西，告诉你0.85~1.0V,最高i7跑3.1G,i5跑2.8G
这个i7跑2.8G的时候是可能比i5电压低，可是prime95的时候会push到3.1G,自然是跑1V
和跑2.8G的i5没电压区别，而且很可能比跑1.8G标称的i5电压高
你不会认为i7跑3.1G极限的时候需要电压比i5跑2.8G极限电压还低吧？
... 阅读全帖 |
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s******k
发帖数: 50 | 30 也就买个平时用的本，一般打字比较多，但是不会做复杂图像处理。也就上上网看看
online streaming.这两个Lenovo的价格差不多，不知道哪个配置更划算一些。请指教
一下。多谢！
Lenovo Z510: $ 585
4th Generation Intel Core i7-4700MQ Processor (2.40GHz 1600MHz 6MB)
Windows 8.1 64
15.6" HD LED AntiGlare with integrated camera (1366x768)
Intel® HD Graphics 4600
4.0GB PC3-12800 DDR3L SDRAM 1600 MHz
500 GB SSHD + 8 GB SSD
DVD Recordable (Dual Layer)
Lenovo BGN Wireless
Bluetooth Version 4.0
4 Cell 48 Watt Hour Li-Cylindrical
Lenovo Z40: $569
4th Generation Intel® CoreT... 阅读全帖 |
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m*p
发帖数: 1331 | 31 走了狗屎运，拿了个奖，荣获高端神卡Nvidia K20。
现在家里有个普通电脑，Dell Inspiron 620， I5 CPU + 16GB ram + 2TB + 300
Watts.
http://www.cnet.com/products/dell-inspiron-620-core-i5-2310-2-9
折腾了一晚上，这块神卡就是长了那么1cm，死活装不上去，急死人！
升级主机求大神们建议。。。
1，好像这个卡是150 Watt max? 那么要配什么的电源？
2，打算直接买个大机箱，然后把现在的inspiron 630主板和所有硬件都移过去，可行
吗？请推荐个好的机箱？
3，有经验的大神请给点tips，伺候这个显卡还需要什么？
4, 没有在美国装过电脑，在国内装过很多台以前。一般都是在哪里买这些硬件？网上
？湾区这边有哪些实体店可以买呢？
谢啦！ |
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S*A
发帖数: 7142 | 32 待机是 sleep mode？ Kill a Watt 测不出来。
1W？ 有时候没有插电线 Kill a Watt 显示也是 1W。 |
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s*******h
发帖数: 1361 | 33 看看我这贴没准对你有帮助
http://www.mitbbs.com/article_t0/Hardware/31862029.html
早上到公司随便翻翻就发现一堆outlet xps 8700 + 30% off coupon 的deal，现在可
能还有些
Processor: Intel Core 4th Generation i7-4790 processor (8M Cache, up to 4.0
GHz)
Windows 8.1
1TB 7200 rpm SATA 6Gb/s Hard Drive
256 GB Solid State Drive
8 GB Dual Channel DDR3 at 1600MHz (2x 4GB) Non-ECC
8X Blu-Ray BD Combo (Blu-ray ROM + DVD+/- RW)
AMD Radeon HD R9 270 2GB GDDR5
Intel Centrino Advanced-N 6235 and Bluetooth 3.0
Dell KB213 Wired Multimedia Keyboard
De... 阅读全帖 |
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s******k
发帖数: 50 | 36 【 以下文字转载自 Hardware 讨论区 】
发信人: stillask (stillask), 信区: Hardware
标 题: 这两个Lenovo laptop那个更划算一点
发信站: BBS 未名空间站 (Fri May 23 16:21:18 2014, 美东)
也就买个平时用的本，一般打字比较多，但是不会做复杂图像处理。也就上上网看看
online streaming.这两个Lenovo的价格差不多，不知道哪个配置更划算一些。请指教
一下。多谢！
Lenovo Z510: $ 585
4th Generation Intel Core i7-4700MQ Processor (2.40GHz 1600MHz 6MB)
Windows 8.1 64
15.6" HD LED AntiGlare with integrated camera (1366x768)
Intel® HD Graphics 4600
4.0GB PC3-12800 DDR3L SDRAM 1600 MHz
500 GB SSHD + 8 GB SSD
DVD Recordable (D... 阅读全帖 |
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l**********1
发帖数: 5204 | 37 GM 2.3/5.0
University: Heriot-Watt University
Research Area: Theoretical and Computational Chemistry
Comments: Before you decide to work with him try to contact his former PhD students at Heriot-Watt
University
from
//myevilprofessor.com/professor_reviews/showcase?page=6 |
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i*****r
发帖数: 318 | 38 10年没碰通信原理了，都忘光了。
帮忙看一下这道题目怎么解，很简单。多谢。
A receiver requires a minimum S/N ratio of 14 dB. The average noise power at
the receiver is 1 x 10-5 （10的5次方）Watts. The transmit power at the
transmitter is 1.5 Watts. Between the transmitter and the receiver there is
a 13 dB gain amplifier. The transmitter and receiver are connected by a
cable. This cable has a cable loss of 0.7 dB/km. Determine the maximum
possible cable distance between the transmitter and receiver. |
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w*******e
发帖数: 16 | 39 noise power at receiver = 1e-5 watts = 10log10(1e-5) = -50dB
minimum signal power required at receiver = -50+14=-36dB
transmit power = 1.5 watts = 10log10(1.5) = 1.76dB
signal attenuation by cable is 0.7L dB
therefore, 1.76 + 13 - 0.7L = -36, L = 72.5(km) |
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z*******g
发帖数: 94 | 40 I think the first one is in watt/herz, and second is in watt, I used the
power spectrum analyzer in Labview to tuned my guitar before.... |
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i*********5
发帖数: 19210 | 41 Bigfuzzydoug’s Ten Points to Swimming:
http://www.beginnertriathlete.com/discussion/forums/thread-view
The key to swimming is reducing drag, not endurance or powering through the
water. This is not just my opinion; it is the law of physics. I’ll
explain it in a simple way: When you bike, you have to push air in front of
you out of the way. The bigger the frontal section of your body and bike,
the more air you have to move. What’s worse is that it’s not a one to one
relationship. An increas... 阅读全帖 |
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R*****s
发帖数: 41236 | 42 【 以下文字转载自 Cycling 讨论区 】
发信人: Rodimus (变叔- 似水流年), 信区: Cycling
标 题: Zipp 404 Aluminum Clincher Wheelset
发信站: BBS 未名空间站 (Wed Jan 11 11:40:28 2012, 美东)
早上看邮件，看到这么个咚咚：
http://www.nytro.com/index.cfm/product/?ProductID=7867
Aerodynamics - time and watt savings over 40K for 404 Firecrest Wheelset: 80
seconds / 27 watts.
貌似比碳轮还快？如果是真的话，这个比tubular便宜又方便啊？大牛怎么看？ |
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i*********5
发帖数: 19210 | 43 这就是碳轮，只不过它的最外圈是铝的（Aluminum Clincher），而不是全碳 Full
Carbon Clincher。
这个介绍写的比较具有欺骗性，因为＂Aerodynamics - time and watt savings over
40K for 404 Firecrest Wheelset: 80 seconds / 27 watts. ＂是用404 Firecrest测
出来的。而404 Firecrest只有Tubular（全碳）和Carbon Clincher（全碳）版。
http://www.zipp.com/wheels/index.php
当然404铝Clincher仍然是好轮！花花上次买的好像就是这副。
80 |
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d*****n
发帖数: 1875 | 44 昨天晚上group ride, 在距离结束8 mile 处被drop. 我不慌不忙，自己骑了大约 1
mile后，
看见了我的group. 2人倒在地上，4俩自行车的crash，平路，直路。2人受伤，LBS的伙
计Joe看上去伤到shoulder骨头了。另外一位是group 唯一的女性，双腿多处流血。昨
天大约15人。
后来听 Robert 说是后面的轮子挂到前面了。前面的没走直线。
我看了昨天的data , 被drop 前的 2 mile 速度都是 27.8 和 27.8，被drop 前的20分
钟，平均210 watts. 如果我能连续30分钟保持 210+ 的 watts, 就能避免昨天被drop. |
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