w********r
发帖数: 8704 | 1 看流量吧，如果你的pressure regulator流量上限是20GPH，每个emitter是0.5GPH，就
能接40个，接多了emitter也可以，压力不能保证，滴水慢了，你要求不高的话问题也
不大 |
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O*******e
发帖数: 6055 | 3 目前我家后院有一个滴灌控制器，连在200多尺长半径1/2英寸的滴灌主管子上。主管上
目前已经连了45个滴灌头（emitter）。
请问最多可以连多少个滴灌头？如果再多连70个滴灌头，会不会压力过低工作不正常？
谢谢！ |
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J**S
发帖数: 25790 | 4 感觉应该没问题。 最多流速慢点，浇时间长点。 我今天应该装了30多个EMITTER， 有
点还嫌水量大，调到最小。 |
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O*******e
发帖数: 6055 | 5 目前我家后院有一个滴灌控制器，连在200多尺长半径1/2英寸的滴灌主管子上。主管上
目前已经连了45个滴灌头（emitter）。
请问最多可以连多少个滴灌头？如果再多连70个滴灌头，会不会压力过低工作不正常？
谢谢！ |
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j*****u
发帖数: 1 | 7 edge emitter 是PN Junction semiconductor laser,
Thanks! |
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f**d
发帖数: 768 | 8 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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h**w
发帖数: 4510 | 9 扎眼只能在1/2管上，用二通接1/4管，或直接接emitter.1/2 tubine+emitter才能这么
接。
1/4 tubine直接套在emitter上的，不能扎眼接emitter。所以要用专门的in line
emitter，它两头套1/4 tubine，自己中间滴水。这样就和1/2＋emitter效果一样了。 |
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b*******1
发帖数: 1352 | 10 所有物品都在homedepot plumber区能买到，都集中放在一起。问小二drip line在哪，
就能找到。清单：
1，定时器，可直接拧接到水龙头上。分indoor/outdoor, line power/battery power
几种。我图省事，买了outdoor, battery powered的那种，大约30刀
2，1/2英寸胶管，可直接拧接到定时器的输出口。
3，1/4英寸胶管。分有/无格子孔两种。我家植物稀稀拉拉，选的是不带格子孔的。买
时成卷，用前需先将所需长度的1/4"胶管拉直，在太阳下晒上半天，让它变直，否则不
好安装
4，Drip emitter，就是顶楼照片里那个红色的东东。参考
http://www.rainbird.com/homeowner/products/drip/SpotWateringEmi
一头尖可以插入1/2"胶管，另一头可以套1/4"胶管。分pressure compensated/non-
compensated两种。简易选压强补偿的，那样水流更稳。
以上4样是必须的，加一块50刀上下。其它辅助的东西包括：
5，Drip emitter... 阅读全帖 |
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i****x
发帖数: 17565 | 11 3dtv play的说明书在这 http://www.nvidia.com/object/IO-98478.html ，我电视当然支持，直接写在主页上的。
Get compatibility with HDMI 3D TVs and compatible TV manufacturer's 3D
glasses system, including Panasonic® VIERA® Full HD 3D plasma TVs.
For a current list of supported 3D TVs and receivers, click here.
说明书里看到了这么一段坑爹的话：
3D Vision USB IR emitter or notebook PC with Built‐in 3D Vision IR emitter.
The USB IR emitter must be plugged into the PC to use NVIDIA 3DTV Play.
Note: The 3D Vision USB IR emitter does not... 阅读全帖 |
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g*********o
发帖数: 20357 | 12 1。基本上是拆了一个区的，只有一段旧管子埋得太深又被树根盖住了，就锯断了没拆
出来
2。其实是绕了一个圈，然后中间连了平行的管子，就好像“目”字中间有很多条线
3。emitter很容易，完全不用担心，买了管子，锥子，和小emitter简直信手拈来，我
现在中间还没种东西，所以中间那些平行管子上还没有放emitter，只在周围一圈种的
韭菜和芦蒿管子上放了emitter
4。管子要固定的 |
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d*b
发帖数: 21830 | 13 TONGXUE这个人就是白痴，自己没卵，还以为全天下的男人都没卵。
先给你这种傻逼科普下吧，MRI做神经动力学研究是nuclear medicine比较热门的方向
，首先你要有positron emitter,比如F18，也有其他的photon emitter, photon 能量
超过1.02Mev，就会通过pair production成一个正电子，一个负电子，这个电子对是
back to back的，通过测量这个电子的轨迹，可以非常精确的测量出positron emittor
的位置。测量这个的仪器工程上叫gamma camera, 医学上叫PET或者SPECT， 这是基本
原理。
下一步就是你们生物傻逼们做的事，把F18或者photon emitter集成到bio marker上，
这个bio marker只能跟某些receiptor结合：比如cancer cell,比如神经cell, 这样，
集成了emitter的bio marker注射到人体内，迅速跟receiptor结合，然后用gamma
camera每几秒探测一次bio marker的精确位置，这样就可以判断人体内，比... 阅读全帖 |
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h**w
发帖数: 4510 | 14 那个太繁琐了，除非你一个地方只种一两棵植物。。比如一尺一个滴头，用这个就必须
1/4管加T，一头接下去，一头再接1/4管再接个stake再接滴头。
用in line emitter只要1/4剪断加emitter就好了，不用的时候去掉emitter加个
connector。 |
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h**w
发帖数: 4510 | 15 你前前后后说化肥不就是它催生吗？你还讲了它什么了？ 最可笑是说上农药催生。 杀
虫剂催什么生？你上瓢虫也是催生？真正催生的是生长荷尔蒙，版上除了偶尔说下生根
粉和神水，别的有人在用吗？这两样也都是用在花上。
同样的西红柿的整枝，果树疏果也是为了集中营养物质，＂催肥＂果子，怎么这就是物
理兴奋剂了？
原来你还没搞清drip tubine和drip line的差别啊，上次是你跟着HD一起错我懒得说。
HD就是卖的DIG Corp的产品，你看它们怎么说。你现在在HD search dripline，选DIG
的产品，得到是：
DIG Corp 1/4 in. x 50 ft. Soaker Hose Dripline
DIG Corp 1/4 in. x 100 ft. Dripline with 9 in. Emitter Spacing
DIG Corp 1/4 in. x 50 ft. Poly Micro Drip Tubing
DIG Corp 1/4 in. x 100 ft. Dripline with 6 in. Emitter Spacing
DIG Corp 1/2 in... 阅读全帖 |
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h******h
发帖数: 4 | 16 poly-emitter reduces the minority carrier lift time and diffusion length in
emitter, so the stored charge in
emitter is less. This leads to less diffusion capacitance, and faster
switching.
it |
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r*********e
发帖数: 281 | 17 not sure about the pmos in pwell stuff.
poly-emitter has higher gain because the current enjected from the base to
the emitter is lower.
This current component depends on the gradient of excess minority carriers
in the emitter. In the metal/Si case, the density of excess minority
carriers at the metal/Si interface is virtually 0. In the poly/Si case, the
density of excess minority carriers at the poly/Si interface is greater than
0, leading to lower gradient of excess minority carrier density an |
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r*********e
发帖数: 281 | 18 not sure about the pmos in pwell stuff.
poly-emitter has higher gain because the current enjected from the base to
the emitter is lower.
This current component depends on the gradient of excess minority carriers
in the emitter. In the metal/Si case, the density of excess minority
carriers at the metal/Si interface is virtually 0. In the poly/Si case, the
density of excess minority carriers at the poly/Si interface is greater than
0, leading to lower gradient of excess minority carrier density an |
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d*****g
发帖数: 1616 | 19 http://answers.yahoo.com/question/index?qid=20090310184002AApFu
The high cost of fuel fabrication, due partly to the high radioactivity of U
-233 chemically separated from the irradiated thorium fuel. Separated U-233
is always contaminated with traces of U-232 (69 year half-life but whose
daughter products such as thallium-208 are strong gamma emitters with very
short half-lives). Although this confers proliferation resistance to the
fuel cycle, it results in increased costs.
The similar problem... 阅读全帖 |
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l****z
发帖数: 29846 | 21 May 29, 2011
DEAUVILLE, France: Russia, Japan and Canada told the G8 they would not join
a second round of carbon cuts under the Kyoto Protocol at United Nations
talks this year and the US reiterated it would remain outside the treaty,
European diplomats have said.
The future of the Kyoto Protocol has become central to efforts to negotiate
reductions of carbon emissions under the UN's Framework Convention on
Climate Change, whose annual meeting will take place in Durban, South Africa
, from Nove... 阅读全帖 |
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l****z
发帖数: 29846 | 22 (Reuters) - Canada on Monday became the first country to announce it would
withdraw from the Kyoto protocol on climate change, dealing a symbolic blow
to the already troubled global treaty.
Environment Minister Peter Kent broke the news on his return from talks in
Durban, where countries agreed to extend Kyoto for five years and hammer out
a new deal forcing all big polluters for the first time to limit greenhouse
gas emissions.
Canada, a major energy producer which critics complain is becoming ... 阅读全帖 |
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w********r
发帖数: 8704 | 23 第一次装？emitter出水吗？水管压跟regulator匹配吗？regulator和emitter压力匹配
吗？把regulator出口接的管子先卸下来看还漏水不 |
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s*****g
发帖数: 180 | 24 ECT uses single photon emitter such as 99mTc; PET uses positron emitter such
as 18F. The mechanism is different. PET/CT is the fusion of PET and CT.
Usually PET is more sensitive but it is more expensive. As I mentioned, for
bone metastasis, 99mTc-MDP scan (one sort of ECT) is good enough, 18F-FDG/
NaF scan may or may not add value to it. |
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w******x
发帖数: 4396 | 25 different emitters have different efficiencies. a 1 watt emitter might give
you 10 or 30 or 100+. |
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a****r
发帖数: 154 | 26 Matchup of the Millenium, ESPN昨天midnight播的，谁看了？
昨天是第2场半决赛，70年代钢人对90年代牛仔。不得不佩服NFL film的牛拜。
愣是把两个不同年代的队的film剪辑成一场比赛了，从场地的颜色和球迷的
装束当然是可以辨别的出来，但是比赛内容上很自然。举两个例子吧，Cowboys
snap, screen pass给Emitt Smith, 下一个镜头换了个角度，Steelers的LB
在同样的地点把22号tackle了(当然前一个镜头是90年代的后一个是70年代的)。
最后一个play, Bradshaw开球前，镜头从他身后的角度，可以看见做blitz状
拥上LOS的deion sanders (没琢磨出来这个是怎么搞的)。
于是，场上一边是Bradshaw, Swann和steel curtain, 另一边有Aikman, Emitt,
Irvin和Deion Sanders. 场边有Jimmy Johson，还有Steelers的教练(不知道是
谁)。 最高校的是包厢里有尼克松和克林顿(那个镜头是最逼真的,BTW).
再说比赛吧， |
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h**w
发帖数: 4510 | 28 对的.我开始没明白你的细面条意思。
基本上 dripline = 1/4 drip tubine+ in line emitter = 1/2 drip tubine +
emitter.
不过我觉得第一个最方便。 |
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z*********n
发帖数: 94654 | 29 没听懂
in line emitter不是也要剪短加emitter? |
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h**w
发帖数: 4510 | 30 in line是管子剪断装中间，不影响管子的连续性。
emitter，你要管子剪断先加个T，多出的那头才能接根管子再接emitter。 |
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h**w
发帖数: 4510 | 31 不是，我头好晕。
in line是两头的，一般emitter是一头的。差别是前者可以再加1/4管连下去，再加in
line emitter，再加1/4管...无穷无尽。后者就断路了，需要前面用T。 |
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t****g
发帖数: 35582 | 32 这些LED都是这么小的emitter拼起来的？
我用过Luminus的Phalite，直接一个2.3x4.3的大emitter，输入功率90W, 1500流明。
一个就可以搞定一间大房。 |
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t****g
发帖数: 35582 | 33 军事应用无所谓。
其实是用很多emitter然后把他们phase lock起来，调节相位差让干涉峰扫描。类似相
控阵雷达的原理，只不过波长换了。
难度在于几百上千个laser emitter要稳定的phase lock起来技术上难度不小。 |
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i****x
发帖数: 17565 | 34 我刚入手了panasonic 3d等离子，想把电脑连上去看3D电影、玩3D游戏。显卡是nvidia
。查了一下，似乎需要一个3dtv play的软件，但是似乎还要什么IR emitter。我不是
很理解，难道显卡计算出3d画面信号，不是发给电视由电视负责跟眼镜同步的吗？为什
么还要IR emitter？请问有人搞过nvidia+3dtv吗？谢谢！ |
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r***o
发帖数: 1526 | 35 Agree，IR Emitter 的唯一功能就是防盗版，Nvidia太贪了
emitter.
Play |
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f******e
发帖数: 206 | 36 目前网上搜到两个方案
1. Antenna RF -> Box/Emitter -> Broadcast UHF/VHF signal
2. Antenna RF -> Box/Emitter -> Broadcast 2.4GHz -> Receiver RF OUT -> TV RF
IN |
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z*******3
发帖数: 13709 | 37 用编码实现
我找了半天，只找到一个gc后的notification
能在gc后调用代码来做一些操作
其实我想在gc之前，就释放一些东西
然后gc时候就直接gc掉酱紫，不过现在这样也勉强能用
无非就是第一次gc之后，释放，然后等下一次gc再释放就是了
我想自己写一个vert.x的session manager
官方的那个要用到mongo，还没怎么用过，我很怀疑有没有人用过了
估计上网找也找不出什么名堂来，还是自己写方便一点
下面是我写的测试代码，idea都在这里面了
要求java 7u4以上版本，否则拿不到GarbageCollectionNotificationInfo这个类
无法编译
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
import java.util.List;
import javax.management.Notification;
import javax.ma... 阅读全帖 |
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d*******r
发帖数: 3299 | 38 有些道理，没仔细看过 FibJS, 不知道它如果要做 non-blocking 的事情时候，怎么做
的. 如果 FibJS 能提供 Node event emitter 那种机制也行，不一定要传 callback
才能做 non-blocking 的事情. 用 event emitter + event handler 我觉得也可以做
non-blocking 操作的.
感觉 Python 在写 concurrency 的时候还是不太方便. |
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g***w
发帖数: 2 | 39 poly emitter can increase gain by increasing injection ratio of emitter
junction.
reference: "semiconductor physics". Sorry, can't remember the author. But it
's a classic book by some guy in mexico. |
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B*G
发帖数: 13438 | 40 你这个随便一个单模Edge emitter都能做到，加个快点的driver
http://www.axcelphotonics.com/1064SM.php
国内应该也很多，不知道凯普林有没有。
另外对线宽有要求的话Edge emitter会很贵。固体激光器这么小能量的不好找，可以考
虑改造一下green laser pointer外面加个pockel cell，哈哈。 |
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q****i
发帖数: 1395 | 41 1，A gamma-ray emitter has the following energy spectrum: 1Mev@100%, and
3Mev@50%. what is the gamma constant for the emitter in R-m2/Ci-h?
2,What is the exposure rate a distance of 5cm from a 100mCi point source of
I-131?
如能解释一下，感激不尽！ |
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w*******y
发帖数: 60932 | 42 Sorry if a repost - I searched and didn't see this listed.
Coupon code "dealnews1" gets you free shipping (otherwise its $5). This
comes with only a 90 day warranty but there is an OPTIONAL extended warranty
for $30. Looks like a great deal for anyone looking for a projector suited
for presentations.
Link:
http://www.justdeals.com/
This looks like a great deal, it has 4.5 stars from 91 reviews on Amazon.
Link:
http://www.amazon.com/ViewSonic-PJD5123-Projector-120Hz-Lumens/
Full details are cop... 阅读全帖 |
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l****o
发帖数: 2909 | 43 China Outpaces U.S. in Cleaner Coal-Fired Plants
TIANJIN, China — China’s frenetic construction of coal-fired power plants
has raised worries around the world about the effect on climate change.
China now uses more coal than the United States, Europe and Japan combined,
making it the world’s largest emitter of gases that are warming the planet.
But largely missing in the hand-wringing is this: China has emerged in the
past two years as the world’s leading builder of more efficient, less
pollutin |
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w*********g
发帖数: 30882 | 44 澳大利亚航空专业人士对丝带图片的评论，感觉是目前为止最实在最客观的zt
来源: awzh 于 2010-12-29 11:35:08 [档案] [博客] 旧帖] [转至博客] [给我悄悄话
] 本文已被阅读：0次 字体：调大/调小/重置 | 加入书签 | 打印 | 所有跟帖 | 加跟
贴 | 查看当前最热讨论主题 Australia Air Power on J-20
Dr Carlo Kopp
Over the last few days imagery of what is claimed to be China's new stealth
fighter has appeared on a range of Chinese Internet sites. There have been
no official disclosures as yet, so many of the claims appearing in the media
may only be speculation presented as fact.
在过去几天里被称为是中国的新型隐身战机的图片在大批中国军事... 阅读全帖 |
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c**i
发帖数: 6973 | 45 (1) A few major news papers today published in print (online yesterdat) news
stories about
Joseph W Prueher, David L Cunningham, Michael Ducker, Charles Freeman III,
Timothy J Keating, David Michael Lampton, James Shinn, Taylor Reveley and
Heather Mullins Crislip, A Way Ahead with China: Steering the Right Course
with the Middle Kingdom; Recommendations from the Miller Center of Public
Affairs Roundtable. Miller Center of Public Affairs, Univ of Virinia,
undated.
http://web1.millercenter.org/con... 阅读全帖 |
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C*G
发帖数: 7495 | 46 除了沸点热机汽轮机，我老以前看过一个德州startup资料，光热以后，heater-
emitter与cooler-collector之间，不选择量子阱热电材料，选择纳米真空，理论设计模拟值
很诱人，不管是功率还是效率。后来没消息了，原因是技术很难可控实现纳米真空。
hiahia |
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k*********u
发帖数: 2897 | 47 Carbon Credits Becoming ‘Junk’ Before 2013 Ban Closes Door: Energy Markets
http://www.bloomberg.com/news/2011-12-06/carbon-credits-becomin
Investors are rushing to sell some United Nations emission credits before
they become almost worthless in 2013, pushing prices to a record low.
With Europe set to stop recognizing credits for projects that destroy
industrial gases known as hydrofluorocarbon-23 and nitrous oxide in little
more than a year, holders are “racing to beat” the ban, according to
Blo... 阅读全帖 |
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l****z
发帖数: 29846 | 48 January 2, 2012
Fake! Fake! Fake! Fake!
By S. Fred Singer
In discussing the recent release of some 5,000 Climategate e-mails, blogger
Anthony Watts uses the clever headline "They are real -- and they're
spectacular." He credits Jerry Seinfeld as the source. Following his
example, I choose the headline "Fake! Fake! Fake! Fake!" -- also taken from
a Seinfeld episode -- in discussing the surface temperatures generally
reported for the latter part of the 20th century; they form the science
basis... 阅读全帖 |
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a*******m
发帖数: 14194 | 49 see, 碳排放指标正在被清零。
早卖的发财了，哈哈。
祝贺沙钢！
Carbon Credits Becoming ‘Junk’ Before 2013 Ban Closes
Door: Energy Markets
http://www.bloomberg.com/news/2011-12-06/carbon-
credits-becomin
Investors are rushing to sell some United Nations
emission credits before
they become almost worthless in 2013, pushing prices
to a record low.
With Europe set to stop recognizing credits for
projects that destroy
industrial gases known as hydrofluorocarbon-23 and
nitrous oxide in little
more than a year, holders are “racing... 阅读全帖 |
|
v****o
发帖数: 978 | 50 Chinese economic reform and development: achievements, emerging challenges
and unfinished tasks
Jane Golley and Ligang Song
The economic transformation that has taken place in China since the late
1970s is now regarded as one of the most significant social changes in human
history. Within just three decades, China has succeeded in transforming
itself from a centrally-planned closed economy into one of the world’s most
dynamic and globally-integrated market economies. The dynamics unleashed by
De... 阅读全帖 |
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