w***g
发帖数: 5958 | 1 简单的说, 目前的Cloud还是client-server模式，只不过是把更多的计算和数据转移到
server上.
但是用户还需要操心是用A的云还是M的云还是G的云，而且一旦粘上了其中某一个就很难
转移到另
一个。Grid的理想则是服务都应该像电一样，用户只要插上插头就能得到服务，而无
需操心是哪家提供的服务。对于特定的应用，可能更适合其中的一个，但是如果可以选
，那么对用户而言当然是Grid的模式更好。但是商家的目的无非是想绑定用户坐地收钱
，所以更喜欢cloud。当然，cloud这个名字本身是一个忽悠，大家可以各有各的解释。 |
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v******d
发帖数: 1322 | 2 grid主要都针对大规模计算和存储，一个程序会被grid分解到多个节点上运行。
cloud主要是还是关注对用户提供服务。
很难 |
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d****i
发帖数: 1038 | 3 Companies such as Cisco, Siemens are investing in Smart Grid. From
networking technology point of view, what are the special requirements for
Smart Grid? Are there any solutions for it yet? Any further readings about
it? |
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w***g
发帖数: 5958 | 4 起个主贴把则个问题讲讲透。一般来说不可能写出一个各方面全优的算法。
比如速度，占用内存，精度一般不能同时做到最优。精度有各种评价方法，
一般也不能同时做到最优。所有这些方面构成一个design space。软件设
计的时候一般就是选design space的一个子空间，然后允许用户通过调整
(meta)参数来微调子空间中的位置。这个子空间的形状一般不是规则的，
参数一般也不是正交的。参数之间的各种关系可能连作者本人都未必想清
楚了。比如有时候程序写着写着会出来一个可以加参数的位置，然后就
出来一个参数。而且这种参数往往很多，一般会被命名为alpha,beta,
gamma,delta,eta,lambda等等，因为含义作者也没法用一两个英文字母
说清（有例外，比如regularization权重一般也是希腊字母)。
Grid search的问题是，很可能就碰到了那种作者都没有想清楚的奇葩
combination，这个combination恰好在用户的某个评价标准下(比如AUC)
高了0.001，但是在别的标准下差得比较多(比如accuracy差0.01,
cross entropy差0... 阅读全帖 |
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i***k
发帖数: 45 | 5 初入计算化学行当，现在有一个势能FUNCTION, f(a,b,c,d,e)，
我们从别的组拿到了f的ab initio数据，是17万行的数据，分别是变换ABCD得来的
我老板的意思是，做个GRIDDING，就相当于做个LIBRARY，
然后从里面内插，或者外插（interpolation, extrapolation）得到我们要的f值。
可是俺比较笨，不知道该怎么做。能请各位前辈指导一下么？我们用fortran，c
也可以。
1，我是先把17万行数据都读入程序先么？这样会不会内存废掉？俺是在ibm系列
的super computer上做，不知道会不会导致内存太大
2，假设我不先读入，而是每个f(a,b,c,d,e)，我都到外部文件里面去查找，
这个怎么实现呢？ 非常感谢关于这个的建议！ 俺编程半白痴，实在不知道怎么实现。
如果一开始都读入，俺可以想办法实现。如果外部每次都读，就不知道了。：）
谁能帮忙一下？ 多谢！
要是有人有类似的gridding的，外部读入的或者内部读入的程序可以介绍看一下，
就更好了！ 多谢多谢！！ |
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h***o
发帖数: 539 | 6 一开始setup一堆网格点，比如1x1的正方形分成10x10个格子，每个格子0.1x0.1
但程序跑着跑着，发现有些地方0.1x0.1的resolution不够，需要调整这些地方
的grid size...这个adaptive grid size的问题在fortran里用啥数据解构来实现呢？
谁有这个方面的经验吗？谢了先 |
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f*****0
发帖数: 489 | 7
energy
there are many problems with renewable energy but the one concerning
grid is that unlike conventional power sources, the generation of wind
power, for example, is over an area, not a point. So you will have to
build a "local grid" to hook up the wind turbines.
On top of that, turbine farms are typically build where few people live.
That means there is no existing transmission lines, or transmission
lines of enough capacity, to transmit out power generated from a turbine
farm.
economicall |
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m*******d
发帖数: 104 | 8 After spending much of the first day of the Beijing Smart grid conference
discussing the definition and scope of smart grid for China, the second day
of the conference was focused on how smartgrid was going to be rolled out,
what some of the solutions would be, and who was going to pay for it.
Starting the morning was Lorenzo Colovini from Italy’s Enel Group who
provided one of the most interesting, and relevant pitches, of the entire
conference by walking the audience through Enel’s own recent |
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p***e
发帖数: 472 | 9 I'm not an expert in smart grid, just to share something I heard of.
To me, smart grid is a combination of power engineering and communication.
More specifically, it is more to leverage communication techniques to power.
It can happen at different stages, e.g., Distribution such as intelligent
meter (appliances, residential application, etc.), Transmission such as
coordination of substation and plant control. Regarding communication, the
industry is working on communication techniques via g |
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g******u
发帖数: 3060 | 10 there are electronics/software jobs for smart grid applications, like grid
converter/inverter design, power system software etc, but you need to learn
some practical stuff, don't just do simulation. |
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c*******i
发帖数: 160 | 11 其实老板就是搞通信的，但是现在通信funding难搞，于是大家都搞smart grid了，
但是大家也知道，这就是个灌水的方向。发的paper和通信都没啥关系了。
虽然通信不好找工作，但不知道都是smart grid的paper毕业还可以找通信的公司吗？ |
|
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w*******y
发帖数: 60932 | 13 Dungeon Defenders 1/10 - 1/16 800 (33% off)
Orcs Must Die! 1/10 - 1/16 600 (50% off)
South Park: LGTDP 1/10 - 1/16 400 (50% off)
Defense Grid: The Awakening 1/10 - 1/16 400 (50% off)
Link:
http://marketplace.xbox.com/en-US/Promotion/dealoftheweek
I recommend Dungeon Defenders for multiplayer towers, orcs must die for
single player, and eveyone should try defense grid!
Great deals this week.
|
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w*******y
发帖数: 60932 | 14 This is a book I've wanted to read about survival. It has a heavy christian
bias but from what I've read it still seems interesting. Amazon offers this
book sometimes for $0.00 but it's a rental of some sort to prime members.
Today it is $0.00 to buy for anyone although the price may change so check
it before you click buy.
Product Description
Western Society is in confusion, the industrial world is teetering on
collapse, and it looks like things could get worse. Agrarian Blogger,
historian, and... 阅读全帖 |
|
发帖数: 1 | 15 GRID: Get real, it’s deadly? |
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i*****e
发帖数: 2810 | 16 GAY-RELATED IMMUNE DEFICIENCY
: GRID: Get real, it’s deadly?
|
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O**W
发帖数: 58 | 17 同性恋相关免疫缺陷症（GRID，Gay Related Immune Deficiency）
弯弯那点小心思。如果以前武统还有顾虑，这次之后是丁点没有 |
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d******u
发帖数: 1114 | 18 ieee transaction of smart-grid |
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p*******g
发帖数: 809 | 19 IEEE T Industrial Electronics, T Industrial Informatics 怎么样？第一个的影响
因子有5， 第二个有3. 但是不知道这两个杂志是不是smart-grid领域里的主流杂志。 |
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A***a
发帖数: 73 | 20 first choice
IEEE transaction on power systems
IEEE transaction on smart grid
second choice
IEEE Transactions on Sustainable Energy
Applied Energy |
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J*T
发帖数: 55 | 21 IEEE Trans. on Smart Grid 最近已经进入SCI检索了 |
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I*********c
发帖数: 856 | 22 这位连基本的概念都没弄清楚
系统方向
Trans on Power system
Trans on power delivery
电机
Trans on Energy Concersion
新能源
Trans on Sustainable Energy
Trans on Smart Grid 2010年新开的，基本啥都包括
以上5个都是PES的
电力电子 Trans on Power Electronics， PELS的
Trans on Industrial Electronics, IE的
Trans on Industry Applications IAS的
新开的还有一个IEEE Journal of Emerging and Selected Topics in Power
Electronics
Power system和Power Electronics是公认最好的两个 |
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I*********c
发帖数: 856 | 23 所谓的smart grid和传统的power不太是一回事 |
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p*******g
发帖数: 809 | 24 那么对作smart-grid的人来说，什么杂志是业内最认可的呢？ |
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S*********n
发帖数: 440 | 25 VantagePoint Capital Partners Presents:
Smart Grid and Energy Efficiency Career Panel and Networking Event
Thursday, July 14, 2011
6pm - 9pm
Palo Alto, California
Exclusive opportunity to mingle with executive team members of Adura,
Tendril and Trilliant.
Limited space is available.
Pre-registration is required. Please submit a resume to careerpanel@
vpcapitalpartners.com.
Please indicate if you have a specific interest in any of the presenting
companies. |
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a******3
发帖数: 113 | 26 https://www.hackerrank.com/challenges/walking-on-grids
import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
public class Solution {
static int count(int n){
int[][] ar=new int[n][n];
ar[0][0]=1;
for(int i=0;i
for(int j=0;j<=i;j++){
if(i==0 && j==0)
continue;
int left=0, up=0;
if(i-1>=0 && i!=j)
up=ar[i-1... 阅读全帖 |
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s*****l
发帖数: 10 | 27 N*N的grid，对角线上半部分或者下半部分的不同路径（包含对角线路径）数目是
Catalan number，可以直接用DP求解。C(i) = C(i-1) * (2*i - 1) * 2 / (i+1). 初
始值C(0) = 1，C(1) = 1.
如果不包含对角线路径，且考虑对角线上下两部分的不同路径，求2*C(N-1)。 |
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C****t
发帖数: 53 | 28 Assume # of grid points with odd degrees = D, then the minimum # of lifts =
D//2.
In this case, if you have m*n blocks, the number of odd degree points = 2*(m
-1) + 2*(n-1).
The minimum number of lifts should be m+n-2.
For example, you can draw the (m-1) inner horizontal lines first, next you
can draw the inner n-2 vertical lines, the last draw will be the last inner
vertical line + outer boundary.
Totally # of lifts = (m-1) +(n-2) +1 |
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b***e
发帖数: 1419 | 29 这是中国邮路问题的推广。如果提笔的cost 是无穷大的话就退化成中国邮路问题了。
grid |
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r*******h
发帖数: 315 | 30 谢谢启发。3楼给出的是多笔画无重复的最小成本方案，而你提到的中国邮路问题解决
了一笔画可能有重复的最小成本方案。这两个值可以看作最终答案的上界和下界，对于
有些grid来说，可能存在多笔画有重复的最小成本解。 |
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w****i
发帖数: 388 | 31 Oh, 这样啊。。。那郁闷了， ： （
不知道为啥老美这么喜欢窗户加grid, 没觉得有啥好处啊 |
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R****9
发帖数: 815 | 32 唯一的好处是通往阳台的门有grid，出去有个提醒不容易撞到。 |
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m*******d
发帖数: 104 | 33 Smart Grid 还在制定标准阶段,有很多方向, 但谁也不知道未来它是什么样子.
方向太多就是没有方向.但是技术需求是明摆的. 如果能搞些technology出来还是有可
能有市场的.
比如, 搞个smart meter实际系统(可能晚了)
对于DG的应用, control 和 management 会是个问题, 你能提出解决方案吗?
还有很多.....
关键还是要瞅准方向,结合自己的长处. |
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S*********n
发帖数: 440 | 34 greentech media has a pretty decent report on smart grid. i recommend it to
anybody who just started to learn about this space. |
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r*d
发帖数: 750 | 35 您转给 meanfield,现金(伪币):333,收取手续费:3.33
同时附加了如下留言给 meanfield.
for smart grid club |
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w********t
发帖数: 5586 | 36 what is the core technology behind smart grid? ( not including software
implementation)
Communication over Power line/ power converter/Database management ? |
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K*******d
发帖数: 29 | 37 最近有个项目，需要Smart Grid相关产品。如有这一行的朋友请站内和我联系，或email到k*******[email protected]。谢谢！ |
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c***m
发帖数: 2630 | 39 don't know anything about it yet. Big volume today though. I Will watch. I
believe the DOW will drop somehow, but I can sleep with enoc nicely. Its
software is the backbone for US future--- smart grid. It won't drop huge
even Dow slid 2%.
BTW, where did u find this abtg? |
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L********3
发帖数: 2272 | 40 Follow your post, I check the whole sector of smart grid and then found this
one. The volume is sharply increased today.I bought a little to see what
happens. |
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c***m
发帖数: 2630 | 41 no. can u post the link for the smart grid sector quoto? |
|
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c***m
发帖数: 2630 | 43 I see, thanks for sharing. i think either enoc or pwr is the largest one in
this area. Good and ibm have some exposure to this area too.
solars are so strong. They are back now. Man. These convinced me to put
more into this enoc or grid. |
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c***m
发帖数: 2630 | 44 Yes. I watched it went up from 30. It looks nothing will stop it no matter
how market behaved. But their inside trading keep selling their stocks, I
don't know why. What is your guess?
my choice:
1. enoc
2. grid |
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g********4
发帖数: 4959 | 45 Thanks. Looks very good. Lots of good news recently including positive ER.
But why it drops so much?
发信人: robocat (black_bird), 信区: Stock
标 题: Re: smart grid 的厂家
发信站: BBS 未名空间站 (Thu Feb 17 11:22:58 2011, 美东)
AMSC would be one...I am still longing this stock |
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l**k
发帖数: 45267 | 46 我这电是nstar，气是natinal grid，难道他们都是多种经营的？ |
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c********6
发帖数: 658 | 47 没明白你这只要$500刀，是就挖条沟进你家还是包括其他的。09年，我家换了新的
heating system, 花了6500刀，都不用挖沟，就是直接把旧的换了，当然也换了一些管
道。也是用的National Grid . |
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b***b
发帖数: 13249 | 48 是把GAS LINE从街上接到家里。以前是有过免费的，但是要用它指定的公司， 比较贵
。我找的另一家公司比跟NATIONAL GRID ASSOICATED的公司便宜$2000.去年估的价，当
时有$1500的CREDIT，今年还没估价。
你家不用挖沟，说明本来就有GAS， 只是换新的heating system， 这是屋里的工作。
把GAS LINE从街上接到家里是外面的工作。 |
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B*****s
发帖数: 3463 | 49 google national grid please. :) |
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r*********y
发帖数: 124 | 50 我住在Malden, 9月份安装national grid的gas furnace, 但是一直被他们受Res Non-
heat的价格. 因为这个月用了111 therms, 总共&188.46, 打电话之后他们改成一下得
R3 Res Heating 账单:
Minimum Charge $11.00
$ .3333 per day for 33 days
First 44.0 therms @ $.4496 19.78
Next 67.0 @ $.5343 35.80
Distribution Adjustment:
111 therms x 0.17920 per therm 19.89
GAS DELIVERY CHARGE $86.47
GAS SUPPLY CHARGE
@ .67270 /therm $74.67
TOTAL CURRENT CHARGES $161.14
我的疑问是为什莫最后一项的supply charge不管是Res non-heat还是Res Heat, 都是$
0.6727/therm, 大家... 阅读全帖 |
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