k*********g
发帖数: 791 | 1 the direct reason that staggered grid works while collocated grids fails:
for an array of probelms with not-generally-correct boundary conditions, the
staggered grid has a built-in mechanism to avoid trouble. for example, if
you add body force to the system and your interest is in the velocity field,
then on the staggered grid the the gravity will be automatically taken care
of by the pressure which should be the case in the continuous sense (
gravitational potential can be simply added to the p... 阅读全帖 |
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b***b
发帖数: 13249 | 2 今天是个我家的重大日子，National Grid 终于来把GAS LINE接进家，谨以此文纪录我家的GASLINE历程。
去年四月中旬响应OBAMA的节能号召，在收到NATIONAL GRID的OILtoGAS的宣传单后，立即交了申请表，当时有PROMOTION，只需交$500就可以把GAS LINE接到家。
２０１０年５月２０日，收到NATIONAL GRID的电话，说是不能接GASLINE。理由是GAS是在大路上，我家藏在路里面，距离太远，想做可以，另加＄７０００，得我自己出，＄５００是万万不可能的。
给NATIONAL GRID打电话问情况。在电话里时而引用OBAMA的节能精神，时而表示对国际能源的担忧，时而晓之以理，时而动之以情，时而抑扬顿挫，时而温文尔雅，时而沉默不语，时而在沉默中爆发。。。。。。。。三寸不烂之舌说了一个多小时后，快说烂了，挂断电话，老公儒雅地安慰我说算了，本来房子小用油不多，不能装就不能装呗。
时间过了一个又一个月，把这事基本忘了。
想起来我的＄５００已经被收了，可是没还给我。就发邮件问，打电话问，没人理。今年到了，５００元还是没还给我。终于于一月份打通了... 阅读全帖 |
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s**i
发帖数: 220 | 3 瞎猜一下：
1) init state:
grid[1,1] = ?;
grid[2,1] = ?;
grid[1,2] = ?;
grid[2,2] = ?;
2) state transfering:
grid[m, n] = min{grid[m-1,n]+Line[m], grid[m, n-1]+line[n],grid[m-1,n-1] +
out border } |
|
r*****j
发帖数: 7481 | 4 AASHTO LRFD 在9.8.2.2-open grid floors里面写到 ”Ends and edges of open grid
floors that may be exposed to vehicular traffic shall be supported by
closure bars or other effective means".
里面的closure bars or other effective means指的是什么？ 我的理解是说 edge of
grid需要再焊接一条bar把所有的grid都连在一起。这样整整块gird周围形围城成了一
个长方体的框子？ other means,我可否理解成在2块grid的连接处，可以使用电焊把
face-to-face的面都焊接在一起，然后就形成了一块整体的grid floor？
还有一个焊接的问题，9.8.2.2里面只说明了焊点是单面就3 inch， 双面是1.5 inch，
但是没有说明每隔多远就要有一个焊点，还是说每个grid都需要焊接在supporting
component上面？ |
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c******n
发帖数: 4965 | 5 Grid is just a buzz word, a hype,
in fact, even if there's anything new in "Grid",
it's just a unifying wrapper, giving u a
single interface to resources,
now everybody calls his stuff "grid",
it's funny because the guy Ian Foster got
so irritated by the attempt of other people
to proclaim their stuff "grid", that he wrote
a trash paper saying "only what and what may be called
grid ....", it's like merchants. this buzz word is
basically the result of properganda by this guy.
btw, WS and grid are |
|
l**********n
发帖数: 303 | 6 【 以下文字转载自 WaterWorld 讨论区 】
发信人: liangjingjin (亮晶晶), 信区: WaterWorld
标 题: 关于Smart grid方面的研究
发信站: BBS 未名空间站 (Wed Sep 1 18:31:55 2010, 美东)
有谁对smart grid研究比较了解么？ 能不能和我说说smart grid在通信、信号处理和
状态检测方面有什么研究或者方向可以做？
我以前一直侧重通信、信号处理方向的研究，对estimation也有了解和研究工作，但是
对smart grid不是很熟悉，而且这个方向很大。老板现在让我在smart grid方向找研究
，发掘topic，感觉挺难的。这方向大多是空谈的理论，数学理论不多，仿真实现也不
多。
我现在就想在smart grid这个大领域里，寻找和通信、信号处理，estimation相关的方
向来做研究，还望高人指点，多谢。 |
|
l**********n
发帖数: 303 | 7 【 以下文字转载自 WaterWorld 讨论区 】
发信人: liangjingjin (亮晶晶), 信区: WaterWorld
标 题: 关于Smart grid方面的研究
发信站: BBS 未名空间站 (Wed Sep 1 18:31:55 2010, 美东)
有谁对smart grid研究比较了解么？ 能不能和我说说smart grid在通信、信号处理和
状态检测方面有什么研究或者方向可以做？
我以前一直侧重通信、信号处理方向的研究，对estimation也有了解和研究工作，但是
对smart grid不是很熟悉，而且这个方向很大。老板现在让我在smart grid方向找研究
，发掘topic，感觉挺难的。这方向大多是空谈的理论，数学理论不多，仿真实现也不
多。
我现在就想在smart grid这个大领域里，寻找和通信、信号处理，estimation相关的方
向来做研究，还望高人指点，多谢。 |
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s*****w
发帖数: 1017 | 8 算不算拉不下来shi怪地球引力不够大？
Lack of Rain a Leading Cause of Indian Grid Collapse
Early this Monday morning, 30 July, the worst blackout in a decade left an
estimated 400 million people in northern India (about one-third of the
nation’s population) without power. By 7 p.m., engineers had restored
roughly 80 percent of the more than 8000 megawatts of electrical capacity on
the country’s northern grid that had been unavailable. But just when power
officials expressed optimism that the grid would soon r... 阅读全帖 |
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g******g
发帖数: 35 | 9 请提供你的联系方式： name and e-mail address
A HIGH-PERFORMANCE SCHEDULER FOR JOIN
QUERIES EXECUTION OVER GRID-AWARE
ARCHITECTURES
Abstract
A Grid is a collection of computing resources that share and perform tasks.
Performance optimization can be achieved by
exploiting the Grid power utilities; i.e. multi-processing, multi-
programming, abstract task execution. This paper explores
the management of distributed relational databases over Grid infrastructures
for the execution of J − join queries. Our... 阅读全帖 |
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l**********n
发帖数: 303 | 10 有谁对smart grid研究比较了解么？ 能不能和我说说smart grid在通信、信号处理和
状态检测方面有什么研究或者方向可以做？
我以前一直侧重通信、信号处理方向的研究，对estimation也有了解和研究工作，但是
对smart grid不是很熟悉，而且这个方向很大。老板现在让我在smart grid方向找研究
，发掘topic，感觉挺难的。这方向大多是空谈的理论，数学理论不多，仿真实现也不
多。
我现在就想在smart grid这个大领域里，寻找和通信、信号处理，estimation相关的方
向来做研究，还望高人指点，多谢。 |
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r*****s
发帖数: 985 | 11 Grid computing is about resource sharing. It provides a set of
solutions to distributed computing problems like discovery,
security ...
don't get confused, when we talk about Grid HPC or Parallel
computing, it means the HPC system uses the Grid for resouce
discovering and security. It's not about HPC itself. They are
at different levels.
The ultimate goal of Grid computing is to make the computing
(resource) as ubiqutous as electricity. In that sense, the
Grid is a level higher to the underlying |
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m*******d
发帖数: 104 | 12 IBM's integration work starts with its Global Intelligent Utility Network
Coalition, a group of utilities working with the computing giant on smart
grid efforts. As part of that, IBM has smart grid pilot projects with
utilities including CenterPoint Energy, American Electric Power and
Consumers Energy (see IBM Snags Another Smart Grid Deal), and is also part
of the first nationwide smart grid project in the island nation of Malta (
see IBM Brings Smart Meters to Malta).
IBM also is working on a |
|
w****i
发帖数: 388 | 13 房子的窗户上都装了grid,是夹在两层玻璃中间的那种。 可是偶总觉得那些grid很
block view， 想把grid去掉。 请问是要必须换整个窗户还是可以把两层玻璃拆下把
grid取出来？ |
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h*****n
发帖数: 263 | 14 Oil heating，今天春天打算申请National Grid的Gas line installation. 5月地交的
表，6月出National Grid cash了check,不到$3000,同时交了contractor的押金$3000.
结果一直没动静。8月问，说到3个月很正常。8月27给national grid 发email，结果他
们发现什么都没办，估计给忘了，不过当然他们没这么说。之后催了无数次，10月4号
他们拿到town permit。结果到现在都没动静。
oil 5月就停了，因为觉得一夏天肯定办好了。今天想加点儿油，结果都要求长期的，
没人愿意送一次100加仑。太没天理了! 家里有老有小。
两个问题：
1.哪里去找100加仑油来？
2.怎么sue national grid出出气? |
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u******o
发帖数: 483 | 15 大家好，有人使用national grid 的utility 服务吗？
本人搬到纽约地区不到2个月，收到national grid的两个bill,有几个问题，不知有没
有遇到类
似问题的xdjm.
Q1: gas supply meter 读数感觉偏高！
我以前在另外一个州，冬季也很冷，零下10摄氏度的时候是比较多的，那时候租的
apartment比现
在的略大（都是1bd, 1bath, 1kitchen)，而且5面没有邻居，保温效果较差，冰箱是现
在的2倍
多大，炉子也都大很多。而现在的apartment,除了一面朝南没有邻居外，别的方向都有
邻居都住
人，保温效果较好。家里一般情况下温度在60F到65F之间，很少听到heater主动工作。
我一般在早上起床后打开加热器，到70F，洗完澡吃完早饭后，就关到55F去学校了，直
到晚上睡觉
回来，别的一般不开heater。
搬过来之前，最高月份用气32-35THERMS。而在这边，截止到上个bill周期，用heater
的时候很
少，结果气表读数是原来的最高月份的两倍还多。我查了一下，1个Therms能将正常大
小的一个房间
加热到室温... 阅读全帖 |
|
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g****t
发帖数: 39 | 17 Grid includes everything
Cluster for a local network
P2P mainly on data sharing in a decentralized manner, can be a implementation
mechanism for Grid
WS a more popular standard like RPC, CORBA etc
Grid and WS are converging
Semantic Grid/WS is the future? Welcome bricks |
|
r*****s
发帖数: 985 | 18 Grid, as an idea derived from power grids, itself is good.
We should give Ian some credits as he and Carl did a wonderful
marketing job at a right time. Why isn't legion or condor but
globus as the first important grid product? There must be
some reasons in it ;)
BTW, currently,
Grid Service == WS + OGSA |
|
w*******U
发帖数: 256 | 19 i programmed two codes using staggered and collocated grids to solve the
incompressible N-S equation in a Cartesian box with no-slip boundary
condition (lid driven flow). i used predictor-corrector method to decouple
velocity and pressure and imposed zero normal gradient for pressure boundary
condition in both codes. in the code of staggered grids, everything is fine
whereas in the code of collocated grids the velocity is fine but the
pressure drops always and cannot converge. could anyone help ... 阅读全帖 |
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l**********e
发帖数: 138 | 20 菜鸟求教EE大拿们：
180nm的工艺，process feature size应该是180nm， 也就是最小栅长（L），是吗？那
么database unit (DBU), manufacturing grid, 以及snapping grid 相应地应该怎么
设置？看GDSII文件里DBU设置在0.001um，为什么这么小？feature size是不是就是指
版图里允许画的最小的尺寸，小于这个就通不过DRC了？比如说，180nm的工艺，无论是
W还是连线长度都必须是180nm的整倍数，snapping grid必须是feature size的整倍数
？如果画个200nm的金属线实际做出来是200nm还是180nm? |
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m*******d
发帖数: 104 | 21 Nobody should be surprised that General Electric is a major player in smart
grid efforts – not to mention one with the cash on hand to run Super Bowl
ads pointing out the fact. But beyond the smart meters GE is making, or the
wide-area network WiMax radios it's deploying to support smart grid projects
(see GE Offers WiMax Smart Meter Solution), the engineering giant is also a
provider of a wide range of software aimed at helping utilities optimize
grid operations, said Rick Nicholson, vice presi |
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i***k
发帖数: 45 | 22 【 以下文字转载自 Chemistry 讨论区 】
发信人: icook (icook), 信区: Chemistry
标 题: 问个计算化学问题：怎么读GRID？
发信站: BBS 未名空间站 (Tue May 3 12:55:17 2011, 美东)
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... 阅读全帖 |
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c*********7
发帖数: 19373 | 23 新买的房子8月底close，现在就等gas line接进来。但联系national grid 10周了还没
人来。这个房子原来是用gas的，后来推倒重新盖，但gas line已经在院子边上了，只
要接个管子加个meter就行，也就是1小时的活。打电话给national grid，转来转去。
现在找到具体的人了，但电话总是语音信箱，说不在办公室请留言。不知道有啥办法能
让national grid快点。否则要带着孩子住旅馆了，而且loan的rate也没法lock。不知
道BBB是否管用。 |
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w********g
发帖数: 121 | 24 Grid Computing is GIS??? that's not the case
Grid comp is about sharing computing resources eg CPU, disk, printer, file, data
while GIS can be a scenario of Grid, e.g., distributed GIS |
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r*****s
发帖数: 985 | 25 "Grid is a type of parallel and distributed system that
enables the sharing, selection, and aggregation of
geographically distributed 'autonomous' resources
dynamically at runtime depending on their availability,
capability, performance, cost, and users'
quality-of-service requirements."
The resources on Grids are loosely coupled, which is the
same motivation of Web services. That's why Grid embraces
WS as its underlying mechanism.
WS can be either SOAP RPC/messaging styles, or uri-oriented
REST |
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s*********s
发帖数: 109 | 26 what is your purpose of using virtulization for grid computing? grid
computing focus on resource integration, while cloud computing provide
service on demand. Once you have integrated resources that are dispersed in
the internet (by grid computing tech or others), you can provide resources
for clients based on their demands/requirement (which is cloud computing
model). one good methodology for doing this part is virtulization since it
provide resource re-usability (cost effective), flexibilit |
|
s*****g
发帖数: 5159 | 27 有一个20x20 grid，想画一个正六边形，每个定点都在grid上，需要一个近似的画法，
换句话说，就是把sqrt{3}/2表示成一个近似分数，分子分母都使整数且小于10。
如果不好近似，30x30 grid也没问题，在这里求教了，谢谢。 |
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m*******d
发帖数: 104 | 28 There are much larger utilities deploying aspects of smart grid developments
– smart meter deployments, integrating renewable source of power, energy
storage – but Austin, Texas-based municipal utility Austin Energy has
something close to a complete smart grid up and running.
Austin's "Smart Grid 1.0" has deployed 410,000 smart meters, and expects to
have all of its customers equipped with a smart meter by late summer, said
Andres Carvallo, Austin Energy CIO. The utility has also installed 86,00 |
|
d*******l
发帖数: 2567 | 29 【 以下文字转载自 EE 讨论区 】
发信人: demonbull (牛魔王/Darth Vader), 信区: EE
标 题: 说说smart grid
发信站: BBS 未名空间站 (Tue Jun 16 22:30:31 2009, 美东)
现在好象这玩艺儿很热。晚上储电白天供电，但是储电技术还不行吧好象。
美洲银行在纽约的大楼地下有个巨大的制冰机，晚上用电制冰，白天用并做空调，
据说节能。
谁做smart grid说说。 |
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d******u
发帖数: 1114 | 30 t of smart-grid 是新的期刊，所以sci暂时检索不到。但是smart grid业内比较有名
气的人都在上面发过些文章，接受率并不高，如过你不是那个圈子里面的人更难。 |
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r*******h
发帖数: 315 | 31 画给定行数和列数的grid，每次拿起画笔都是有代价的，墨水也有代价，求画一个grid
的最小成本。
自己思考了一下，DP的问题是无法建立一个转移方程，DFS也有问题，可以重复画多长
一段无法确定。 |
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C*******d
发帖数: 15836 | 32 我们新买了的窗户也都没选grid，就是因为它挡视线。不过带grid的窗户似乎是流行趋
势。很多新房子和新装的窗户都有。从外面看起来确实更精致好看，因该对提高房价有
一些好处。 |
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a********a
发帖数: 3082 | 33 签完contract后想加个最简单flat grid，换窗公司通知，四个窗户加marginal grid要
加450块
怎么觉得他们趁机提价，各位看看是不是这样子
大小是 92“x58" XOX, 47"x57 Pic, 95"x40" XOX, 59"x45" XO |
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k****a
发帖数: 4944 | 34 National Grid energy efficiency rebates
Welcome to National Grid’s energy efficiency rebate application web site.
We offer rebates on qualifying energy efficiency equipment for Residential,
Commercial and Multifamily gas heating customers. Installing high-efficiency
equipment helps you reduce energy usage, lower your energy bills and ensure
a cleaner, “greener” future!
请推荐Contractor，自己不懂哪款机器有退款。
谢谢！ |
|
S*********n
发帖数: 440 | 35 【 以下文字转载自 JobHunting 讨论区 】
发信人: Schweinchen (Oink Oink), 信区: JobHunting
标 题: Smart Grid and Energy Efficiency Career Panel and Networking Event
发信站: BBS 未名空间站 (Mon Jun 27 17:11:53 2011, 美东)
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 requi... 阅读全帖 |
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S*******s
发帖数: 10098 | 36 光挖那样长的沟渠，就要$5000多了吧。 美国公司的服务还是不错的， 换了国内可能
要斩客户一刀了。恭喜！
我家的GASLINE历程。
立即交了申请表，当时有PROMOTION，只需交$500就可以把GAS LINE接到家。
GAS是在大路上，我家藏在路里面，距离太远，想做可以，另加＄７０００，得我自己
出，＄５００是万万不可能的。
国际能源的担忧，时而晓之以理，时而动之以情，时而抑扬顿挫，时而温文尔雅，时而
沉默不语，时而在沉默中爆发。。。。。。。。三寸不烂之舌说了一个多小时后，快说
烂了，挂断电话，老公儒雅地安慰我说算了，本来房子小用油不多，不能装就不能装呗
。
今年到了，５００元还是没还给我。终于于一月份打通了电话，被告知NATIONAL GRID
重新考虑了我家的情况，认为把GASLINE 接到我家是可行的，也不必多出钱。因为我
家门前的一家是用GAS，它的GAS HEAD 容量不够大，而且一直这个HEAD和LINE有漏气
，在接GASLINE到我家时顺便他们会换整个LINE和HEAD。
大论论证GAS对我家的重要性。 做HEARING那天，只有一个邻居到场问问题，发现
GA... 阅读全帖 |
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L******k
发帖数: 33825 | 37 2010 Summer Internship Program
The 2010 Summer Internship Program will begin on Monday, May 17, 2010. If yo
u know someone who would be interested in participating in National Grid's 2
010 Summer Internship Program, please refer them to our www.Monster.com inte
rnship postings. Interested applicants must apply through Monster; resumes a
nd inquiries sent directly to the Recruiting department will not be consider
ed. Visit www.monster.com and use the keywords 'National Grid' and 'internsh
ip' in |
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o******e
发帖数: 3522 | 39 比gt5简单多了，但也不会太简单以至于失去可玩性。
我比较倾向于玩grid, gt系列太hardcore, nfs太简单。grid is best of both worlds
. |
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P*****f
发帖数: 2272 | 40 感觉在理论上没什么新的突破阿
还有这个Grid
跟几年前提的meta-computing好像没啥差异阿
当然，是指在并行计算的context下，和商用得Grid关系不大.
大家讨论一下这个问题吧 |
|
r*****s
发帖数: 985 | 41 take a look at the major conferences on Grid like Grid Workshop on SC,
CCGrid, HPDC ... |
|
g****t
发帖数: 39 | 42 Without him, few guys have the energy to push the Grid concept. He has been
involved in many grande projects on high-energy physics, bioinformatics etc.
An emerging industry or innovation needs one visioner or agenda-setter or a
group.
Regarding the innovation, the high-profiled standardization process is a big
innovation in Grid. It could result in some breakthrough in the long-term with
millions of researchers and billions $, who knows.
Forget these general and big vision, what can we do to co |
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c******n
发帖数: 4965 | 43 ft, if you claim online multiplayer games to be "grid"
I fool eh you
sony 还真吹过它的PS3要grid-enabled 如何如何, 现在也不吹了 |
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g****t
发帖数: 39 | 44 why not? look at the following
http://www.cis.upenn.edu/~hhl/games/
With Grid (or any else) standard, all game vendors can join the game sever
pools.
Grid is nothing but resource virtualization and management in a standard way.
with
We |
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r*****s
发帖数: 985 | 45 Well, his contribution feeds so many professors and students all over the
america/world including me, with funds, degrees, tenures ... :D
I would suggest not to think too much on the world "Grid". All the general
knowledge/theories/techniques apply to "Grid". If you really want to get
one step closer, that's Web services. There are so open issues in WS, but
industry does it better than academia ... |
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e***T
发帖数: 107 | 47 actually if you google "grid computing conference" "super computing"
"high performance computing"
you can find a dozen of them.
ex:
IEEE/ACM International Workshop on Grid Computing is the one joint with
SuperComputing (SC)
GlobusWorld
International Symposium on HighPerformance Distributed Computing (HPDC)
International Supercomputer Conference (ISC)
... |
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r****o
发帖数: 1950 | 48 最近对P2P很感兴趣，请问P2P和Grid Computing是不是一回事阿？能否把P2P看成是
Grid Computing的一个方向呢？ |
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C**********n
发帖数: 100 | 49 我概念上很模糊，问个新新手问题。
是不是grid computing侧重distributed computing，而cloud computing侧重server/
client交互？cloud computing的server 群中会不会用到grid computing? |
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T**********n
发帖数: 480 | 50 grid computing是一帮做HPC的人最开始玩的概念，准确说是学术界HPC的人搞出来的概念
cloud是从工业界出来的，更加注重实用，cloud的后端什么都可以用
所以才叫cloud，如果非说用了grid那也可以 |
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