l***d 发帖数: 1798 | 1 【 以下文字转载自 Programming 讨论区 】
发信人: lipid (老子叫荔枝的时候,还没有超女呢), 信区: Programming
标 题: 请教一个问题
发信站: BBS 未名空间站 (Sun Sep 18 22:29:39 2005), 转信
有个code, 先把一个box分成小盒子 grid,
the number of grid in the x, y, z directions is n_xbox, n_ybox, and n_zbox.
下面的一个code写着
/* pre-computing the inverse distances between grid nodes.
N_sqrts = n_xbox * n_xbox + n_ybox * n_ybox + n_zbox * n_zbox + 1
问题1:为什么要加1?
sqrts[0]=0
for (k=1, k
问题2:这个code的目的很明显是先计算各个grid间的距离的倒数,
所以如果, |
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o******e 发帖数: 1001 | 2 用surf函数画了一个三维图,把图copy 到ppt slide上,转换成pdf文件,在pdf文件里
看的时候,major grid还是很清晰的,问题是一打印到打印纸上,major grid就很不清
晰,怎么才能调整major grid的linewidth?我只能找到调整axis的grid linewidth.谢
谢! |
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o******e 发帖数: 1001 | 3 【 以下文字转载自 EE 讨论区 】
发信人: onehouse (whitehouse), 信区: EE
标 题: 问一个matlab画图的问题
发信站: BBS 未名空间站 (Sat Jan 23 11:59:31 2010, 美东)
用surf函数画了一个三维图,把图copy 到ppt slide上,转换成pdf文件,在pdf文件里
看的时候,major grid还是很清晰的,问题是一打印到打印纸上,major grid就很不清
晰,怎么才能调整major grid的linewidth?我只能找到调整axis的grid linewidth.谢
谢! |
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o****o 发帖数: 8077 | 4 for this particular question, SAS actually is pretty handy:
*******************************;
data test;
do id=1 to 20000;
x=rannor(0);
output;
end;
run;
ods select none;
proc surveyselect data=test out=samp method=srs
seed=93759437 sampsize=1000 rep=100 ;
run;
ods select all;
proc univariate data=samp noprint;
by replicate;
histogram x/outhistogram=hist outkernel=kernel noplot;
run;
proc sgplot data=hist;
series x=_MIDPT_ y=_OBSPCT_ /group=replica... 阅读全帖 |
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w*******y 发帖数: 60932 | 5 Premiertek ANT-GRID-24dBi Outdoor 2.4GHz 24dBi Directional High-Gain N-Type
Female Aluminum Die Cast Grid Antenna
If your serious about picking up remote wifi signals 24 DBI about the
highest gain antenna you will find anywhere. you need an N type connector
that will adapt this to a USB dongle. This should blow away any other wifi
antenna you can find. I can't recall the exact details, but DBI is a
geometric prgression so 24DBI is many times more powerful than any other
antenna (especially the o... 阅读全帖 |
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h*****9 发帖数: 6643 | 6 American Superconductor Corporation, a power technologies company, provides
wind turbine designs and electrical control systems primarily in North
America, Europe, and the Asia-Pacific. The company also offers a host of
smart grid technologies, including superconductor power cable systems, grid-
level surge protectors, and power electronics-based voltage stabilization
systems for power grid operators. It operates through two segments, AMSC
Power Systems and AMSC Superconductors. ....
不要傻笑,也不要不懂装... 阅读全帖 |
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i*****T 发帖数: 1855 | 7 lz还是有科学精神的,可是大家也不要太急于捧臭脚了。
lz想以GCM的水平精度为2度证明三峡面积小,在GCM中不足以产生影响。这有几个问题
1)首先你要承认GCM是准确无误的。三峡问题本事就是争议问题,有论文指出GCM可以
准确预测水利工程对气候的影响么?请给出出处。
2)GCM的用处。顾名思义,是对全球长时间气候做研究的,比如厄尔尼诺现象,看的是
时间跨度几十年的事。论据:GCM无法考虑火山爆发等现象对气候的短期影响(参见
wiki)。而三峡就是这样的事件。所以GCM无法对三峡的影响做判断。
3)最致命的,GCM的精度的确定标准是什么?lz的逻辑是,GCM的确定标准是达到这个
精度就足够了。但事实是,由于计算能力所限,只能在这个精度上进行建模。因为精度
加一倍,意味着计算量大4倍,成指数增长。所以这是个妥协。这完全不能证明这个精
度够了。而事实是,这个精度完全不够。我非专业,只能用wiki,引用如下。事实是,
现有模型HiGEM就比lz引用的数据精确多了(精度加一倍,计算量大4倍)。而作为用作
天气预测的模型,其精度比HiGEM还要高。所以lz引用数据错误,这是他最基本的论证
出发点... 阅读全帖 |
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s*****r 发帖数: 11545 | 8 体制问题,这样举国体制办grids, 当然不行。如果不把办grids的权力下放到民间,
民主就是挂羊头卖狗肉。民间办grids,一切问题迎刃而解。
far,
underground. |
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p******u 发帖数: 14642 | 9 子系统外包给脚盆而已
http://www.world-nuclear.org/info/inf63.html
Qinshan
Qinshan 1 in Zhejiang province 100 km southwest of Shanghai, is China's
first indigenously-designed and constructed nuclear power plant (though with
the pressure vessel supplied by Mitsubishi, Japan). Design of the 300 MWe
PWR was by the Shanghai Nuclear Engineering Research & Design Institute (
SNERDI). Construction work spanned 6.5 years from March 1985, with first
grid connection in December 1991. It was shut down for 14 months f... 阅读全帖 |
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S***a 发帖数: 3956 | 10 http://www.baike.com/wiki/%E6%99%BA%E8%83%BD%E7%94%B5%E7%BD%91
智能电网(英语:Smart grid、smart electric grid、或intelligent grid),以双
向数字科技创建的输电网络,用来传送电力。它可以侦测电力供应者的电力供应状况,
与一般家庭用户的电力使用状况,来调整家电用品的耗电量,以此达到节约能源,降低
损耗,增强电网可靠性的目的。智能电网雏型是20世纪产生的,由一些中心发电机向大
量用户传输电能的电网的简单升级。在传统电网的基础上,电能的传输拓扑网络更加优
化以满足更大范围的各种用电状况,如在用电量低的时段给电池充电,然后在高峰时反
过来给电网提供电能。
智能电网概念的发展有3个里程碑:
第一个就是2006年,美国IBM公司提出的“智能电网”解决方案。IBM的智能电网主要是
解决电网安全运行、提高可靠性,
第二个是奥巴马上任后提出的能源计划,除了以公布的计划,美国还将着重集中对每年
要耗费1200亿美元的电路损耗和故障维修的电网系统进行升级换代,建立美国横跨四个
时区的统一电网;
第三个... 阅读全帖 |
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D***r 发帖数: 7511 | 11 【 以下文字转载自 Dreamer 讨论区 】
发信人: Dreamer (不要问我从哪里来), 信区: Dreamer
标 题: 靠,麻省多数警察实际收入超过100k
发信站: BBS 未名空间站 (Sun Apr 17 00:23:09 2016, 美东)
千老还瞧不起当警察的
What’s wrong with this picture: In a nearby Mass., community, which borders
New Hampshire, half the members of its police force grossed more than $100K
in 2012. Some of those cops not only pocketed more money than their boss,
the Police Chief, but also grossed more than the Town Manager and School
Superintendent of that town. In other words, all that swee... 阅读全帖 |
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g**1 发帖数: 10330 | 12 Facts force Washington Post to backtrack on report that Russia hacked US
power grid
https://www.rt.com/usa/372448-washingtonpost-retracts-russian-hackers/
Editor’s Note: An earlier version of this story incorrectly said that
Russian hackers had penetrated the U.S. electric grid. Authorities say there
is no indication of that so far. The computer at Burlington Electric that
was hacked was not attached to the grid. |
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发帖数: 1 | 13 It is important to note that there is no "national power grid" in the United
States. In fact, the continental United States is divided into three main
power grids:
The Eastern Interconnected System, or the Eastern Interconnect
The Western Interconnected System, or the Western Interconnect
The Texas Interconnected System, or the Texas Interconnect
The Eastern and Western Interconnects have limited interconnections to each
other, and the Texas Interconnect is only linked to the others via direct
c... 阅读全帖 |
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v*****z 发帖数: 3067 | 14 the procedure is not 100% correct.
1. using 230 grid paper sand.
2, 100 grid sand, 1500 sand, 2000 grid sand to very smooth.
3, apply base coat,2 to 3 times.
4, most important step. apply clean coat.2 time (spray gun)
5,check condition, if no dirt smooth shine.
done.
if have dirt or orange peel. buffer all area.
using different compounds. expensive 3 bottles cost $100.
not easy at all, take two days or more.
need prof tools.
I'm doing it right now.need experience. |
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v*****z 发帖数: 3067 | 15 used 1000 grid sand paper wet sand,than buffer.
if scratch still there.
use 600 grid sand paper sand it, than 2000 grid sand paper, wet sand.color
coat (light) clean coat (light)
good luck. |
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l**4 发帖数: 853 | 16 希望对大家有所帮助吧。我当年就是这样学习美国的highway的。
标 题: Re: 诚心请教:我始终不敢一个人独立上高速怎么办啊?
发信站: BBS 未名空间站 (Sat Jun 11 14:45:51 2011, 美东)
hw 183 奇数 南北方向
hw 282 偶数 东西方向
同时HW上有牌子指示你现在那个方向。
reference:
http://en.wikipedia.org/wiki/United_States_Numbered_Highways
Numbering
The two-digit U.S. Routes follow a simple grid, in which odd-numbered routes
run generally north to south and even-numbered routes run generally east to
west. (U.S. Route 101 is considered a two-digit route, its first "digit"
being 10.) The numbering patte... 阅读全帖 |
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y******a 发帖数: 244 | 17
非常同意。 smart grid 很火,但不代表trans on smart grid 很火。目前还处于收稿
不足的阶段吧。
主要文章就是电力系统和电力电子方向的,还有一些通信的,这些方向应该都各有山头
。我看了一期smart grid中电子电子的文章,大吃一惊,基本没一个做实验的,这些文
章submit to power electronics 绝大部分要被拿下。其他的我不了解,不评论。可能
电力系统方向比较认可吧。power system的过来说说。电力系统中power system无疑是
挺难中的,一年不到三百篇文章,全世界这么多实验室。。。。。。。。。。 |
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f****e 发帖数: 30 | 18 第一次:given two integer numbers n and k, print all combinations of k
numbers out of 1 ... n
e.g. if k = 2, n = 4, print
1 2
1 3
1 4
2 3
2 4
3 4
第二次:
if you have a grid
a b c e
d f a h
i j k l
and a dictionary with more than 10K words
print out all words in dictionary that can be obtained by visiting grid.
restriction: if a word is c1, c2, ..., cn, then c_(i+1) should be one of the
eight neighbors of c_i in the grid
第二题出了递归还有什么办法? 我写了一个递归程序,对方问我可以有什么
improvement,想了半天没想出来。 |
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K******g 发帖数: 1870 | 19 一面:可不可以把链表先写到一个数组里,然后再转换成BST?如果需要转换成与原来
一样的BST的话,那还需要建立一个preorder的list。
二面:这题其实就是grid遍历
int isVisited[n][m];
N*M
grid[N][M]
void findWord(int n, int m, string &str)
{
if(n<0 || m<0 || n>N-1 || n>M-1) return;
if(isVisited[n][m] == 1) return;
isVisited[n][m] = 1;
str += grid[n][m];
if(lookupDict(str)) cout << str << endl;
findWord(n-1, m, str);
str.pop_back(); //assume that the string can delete the last char.
findWord(n, m-1, str);
str.pop_back();
findW |
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g*******s 发帖数: 2963 | 20 你这个只能pseudo code吧,不然细节太多就变成图形学问题了。光是求两张任意角度
的牌并集面积就有的写了。
总体两种思路,都是对每一张新牌,求他和之前所有牌的并集面积。主要区别在于如何
找nearest neighbours
一种是每次遍历之前所有的牌,看和哪些重叠。总时间n^2, 用tree可以优化趋近于
nlogn, 空间1。
一种是把桌面分成2D grids。每来一张牌就根据落点register到相应的grid。这样每次
根据新牌的落点可以直接找出之前落在这个grid的所有牌。总时间n, 空间m,m是桌面
的大小。 |
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z****e 发帖数: 54598 | 21 贴几个参考的课程描述
统计和ml
With exponential increases in the amount of data becoming available in
fields such as finance and biology, and on the web, there is an ever-greater
need for methods to detect interesting patterns in that data, and classify
novel data points based on curated data sets. Statistical machine learning
and evolutionary computation provide the means to perform this analysis
automatically, and in doing so to enhance understanding of general processes
or to predict future events.
Topics ... 阅读全帖 |
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l********7 发帖数: 40 | 22 刚面过G,从9月份电面到现在一共两个月把所有事情弄完。
电面只有一轮,出了一个之前版上出现过的题,一个string由0,1和?组成,并且?可
以被替换成0或者1,让输出所有的把?替换之后不同的string,比如1?0把?替换之后
能够生成110和100
之后过了三周才接到onsite的通知
onsite一共有4轮,中间午餐
第一轮一上来告诉我一个function的定义和它的功能,然后问了很多test的东西,我也
不懂,就瞎扯,之后让我实现这个function以及它的一个变种,类似就是一个array of
integer,以及一个int,这个int表示一个window的宽度,这个window从array的一开
始滑动到最后,找出来在滑动的过程中每次window中int的和,比如一个array是[1,2,3
,4,5],然后window的宽度是2,那么就输出[3,5,7,9]
第二轮是给一个int N,让输出所有的长度为N的valid string的个数,valid string的
定义是由A,B,C三种字母组成,并且在这个string中任意连续的三个字母不能包括A,B,C
三个字母,比如... 阅读全帖 |
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l******a 发帖数: 64 | 23 4.2. 第四轮第二个, Harry Potter那道题试写了一下伪代码
memo[m+1][n+1]
For i in [0, m]
For j in [0, n]
Memo[i][j] = 0
For i in [0, m-1]
For j in [0, n-1]
Memo[i+1][j+1] = Memo[i][j+1] + grid[i][j]
Memo[i+1][j+1] = max(Memo[i+1][j+1] ,Memo[i][j+1] + grid[i][j])
val = Memo[m][n]-grid[m-1][n-1]
If val < 0
return -val
Else
Return 0 |
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a*********2 发帖数: 194 | 24 DP?
假设初设strength为0,然后找从左上到右下角的最大strength。
结果路径最大,那么中间每一步都最大。
所以 f(i,j) = max( f(i-1,j), f(i,j-1) ) + grid(i,j) .
初始值f(0,1)=grid(0,1), f(1,0)=grid(1,0),从(0,0)算到(n-1,m-1). |
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x****1 发帖数: 118 | 25 Linkedin
phone1:烙印
lowest common ancestor w/ and w/o parent pointer
phone2:国人
search in rotated sorted array
onsite:
1.两个国人
implement addInterval(start, end) and getcoverage(),
2.两个国人
talk projects and some behavior question
3.烙印
lunch, talk about technologies interest
4.亚裔,不确定是否国人
Manager, talked a lot of behavior questions, interest and projects
5.烙印
Design: tinyurl
6.烙印+小白
1.exclusive array, give an arr1, return a new arr2, arr2[i] is the
multiplication of all elements in arr1 except arr1[i]
... 阅读全帖 |
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f******h 发帖数: 45 | 26 也找工作了一段时间了,从版上学了很多,上周G家面完了,求个bless。
之前的一些都挂了,还在继续找其他的。等定下来之后一定发面经回报本版。
谢谢大家啦!!
1. http://www.mitbbs.com/article_t/JobHunting/32005597.html
1) Implement a simple calculator (+,-,*,/);
2) Implement "+1" for a large integer;
3) How to match Ads to users;
4) How to extract useful information from a forum webpage (list all
kinds of useful signal you can think of)
5) How to detect the duplicate HTML pages (large scale);
6) Find all the paths between two places on Google map;
7)... 阅读全帖 |
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c**y 发帖数: 172 | 27 来自主题: JobHunting版 - T店面两题 1.实现int fibonacci(int n)。给定fibonacci(1) = 1, fibonacci(2) = 1,
fibonacci(n) = fibonacci(n - 1) + fibonacci(n - 2)
要求时间复杂度O(n),空间复杂度O(1)
2. 给定一个 m X n grid,计算路径数从grid[0][0]到grid[m - 1][n - 1]。只能向左
和向下移动。
解法1.时间复杂度O(m * n),空间复杂度O(m * n)
解法2.时间复杂度O(m * n),空间复杂度O(n)
解法3.recursive solution
|
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l***e 发帖数: 303 | 28 You are given a grid of numbers. A snake sequence is made up of adjacent
numbers such that for each number, the number on the right or the number
below it is +1 or -1 its value. For example,
1 3 2 6 8
-9 7 1 -1 2
1 5 0 1 9
In this grid, (3, 2, 1, 0, 1) is a snake sequence.
Given a grid, find the longest snake sequences and their lengths (so there
can be multiple snake sequences with the maximum length).
用dfs的话不太好算最长的sequences 用DP没思路 |
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c******n 发帖数: 100 | 29 Amazon速度惊人!今天面试刚收到offer.
问题不是很难,答得也不错,除了最后一个Design 题,其他的基本上都是上了最优解。
烙印,BFS 的变形题。 Given a grid which represents all location points,
there are some Amazon lockers in the grid, given a customer's location in
the grid, find the closest locker
华人小哥,OOD design a poker game and different methods in each class
华人大哥,validate BST using three different methods, array vs linked list,
how to implement hashtable
美国亚裔,given a list of player, each of them can choose not playing the
game, playing with a specifi... 阅读全帖 |
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k****i 发帖数: 128 | 30 我以为F家是general hire,不分组的
对于rehash了,geohash本来的意义就没了,直接存成经纬度不就行了。另外rehash后
你怎么index到临近点呢?
这题我觉得应该按grid分片,一个grid里的POI存在一起,临近grid分散到不同机器上
。 |
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s*****l 发帖数: 45 | 31 1. Game of lives, 输入: 给一个matrix的grid, 每个的值是Live or Dead, 输出: 一
个同样大小的matrix, 每个的值设定如下:
如果目前值是live, 而且周围8个grid中, live的数量是2 or 3, 则变成dead
如果目前值是dead, 周围8个grid中, live数量是3, 变成live
followup: 尽量减少内存开销, 该怎么做, code之.
2. 买罐装汽水,只能一罐一罐或者一箱一箱地买。箱子有几种不同大小,比如一箱12
罐,一箱6罐, 一箱2, 一箱1 等等。这个input是个list。让输出所有买法(就是每种
package买几个这样)
用recursive解了
followup: 如何剪枝
3. 老题目: 返回一个文件系统里面的duplicate files
4. 老题目: 设计一个web crawler, 多线程版本
5. 给出一堆log, 里面有photo id和访问时间, 还有一个iterator, 能够按照photoId
和访问时间iterate, 问如何输出... 阅读全帖 |
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k******4 发帖数: 7 | 32 为了防止违反NDA,就不列出公司名了,就是一些常见公司。
1. Write a iterator to iterate a nested array.
For example, for given array: [1, 2, [3, [4, 5], [6, 7], 8], 9, 10]
call iterator.next() 10 times should return 1,2,3,4,5,6,7,8,9,10.
用了stack存(array, index)的tuple。
2. LeetCode 原题,120 - Triange。有一点变种,给的是一维数组。
3. Implement HashTable 主要看dynamic expanding
4. Implement MaxHeap.
5. Topology sort,就是版上常见的给一些排过序的未知语言的词,求该语言的字母序
。要求实现核心算法。可以给出一些helper function定义不需实现。
6. LeetCode 付费题 157 & 158 - Read N Characters Given Rea... 阅读全帖 |
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发帖数: 1 | 33 背景:CS PhD + 1.5 years. 非CS行业的一个小公司骑驴找马。大概准备了七八个月的
时间吧,晚上回来陪娃睡了然后自己刷题。很不幸,还是全挂了。另外很多大公司现在
也不招opt身份的非new grad。FLA都没有给我面试。有时候想想,大概这种水平的CS
PhD就我一个了吧(呵呵)。还是喜欢写程序的,可是越来越觉得自己似乎并没有这方
面的天分。骑的驴也没积累到什么CS的经验,做了很多business相关的东西。感觉在这
里待得时间越久,自己的career荒废的越多。而且有了几年工作经验之后就会被问很多
design相关的东西,可是我的实际工作中也没涉及多少。用的也是那套软轮。从当年的
认为只要自己努力什么都能做到的少年,慢慢变成了如今已经习惯了生活会经常跟我开
玩笑的准大叔。身份也没有。PTO也差不多用光(每次都要从东海岸飞西海岸,然后面
试当晚红眼飞回来上班)。娃们还嗷嗷待哺。总是想不通,到底是哪一步走错了,才与
其他当初一起上学的小伙伴们的差距越来越大。不过我在帮助国人方面,问心无愧。只
要经过我手的国人来面试我们公司,我都给过了。 牢骚发了不老少,下面回归正题吧
。... 阅读全帖 |
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s*********6 发帖数: 1 | 34 电子科技大学能源科学与工程学院诚挚邀请世界各地的学术精英加入我们!
Welcome Research Scientists and Professionals from all over the world.
Welcome to Chengdu, the hometown of Panda!
University of Electronic Science and Technology of China (UESTC)
UESTC is a multidisciplinary university, featuring a harmonious integration
of science,engineering,management and liberal arts,with a strong research
force in electronic information science and technology. It belongs to
Ministry of Education of China, and is selected into Project 985 (t... 阅读全帖 |
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S*A 发帖数: 7142 | 35 你在另一个 post 里提到 filter 穿了小孔。
那就足够造成这个样子。如果 filter 有孔的话, pump 的压力
就接近 0. 没法过滤东西,池子里就是混混的。
换个 filter grid,从新上 DE 应该就好了。换 filter grid
大概是 $15 - $20 一块。看 filter 型号, 一般有 6-8 块。
这个 filter grid 也是耗材。 |
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B******1 发帖数: 9094 | 36 As to copy/paste, all you need to do is to use a free software to "cut" the
figure into smaller parts by using a "grid".
Then cut and paste each block from the grid to another picture file, enlarge
to a pre-determined size, and save.
Repeat the above step for every block of the original picture to produce a list
of new picture files.
Print all new pictures (a lot of catridge!!!).
Paste them according to the grid just like what you would do with puzzles. |
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f*****g 发帖数: 99 | 37 哈哈,又来了。这个坛子几天都看不到一个好贴,这算一个吧,毕竟楼主花了不少功夫
做了点成果,并慷慨show给大家,于是花点儿时间送上二分。(画外音:有些大侠,也
不舍得雇个打字员,发个帖子像兔子尾巴,问东问西,不厚道啊)
言归正传。
1。logo
乍一看,马上想到了波音公司,还以为是搞航空航天的。YourHotDeal,总共11个字母
,不算太长,搞成一排,选个合适的字体,1-3种颜色,也能凑合着用。或者花点儿钱
,网上买一个。logo最好往上移,728的广告可以居中。
2。menu bar
调整一下vertical align, 或者我的browser有问题。
3。grid
这一部分是核心,问题也较多:
图片
- 图片最好居中(后面为了节约打字成本,不再使用商量的口吻)
- 部分图片太满,缩小30%
图片下面文字
- 缩小一号字体,比如12px
- 颜色深灰, #777
- 居中
- 最好一两行,不要超过三行
- 所有文字水平对齐
grid border
- top 5px border: 改为浅灰色 #ddd
- dotted line:改为 #ddd
grid cell
- 增加p... 阅读全帖 |
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j***b 发帖数: 5901 | 38 The power grid I connected to have the option of buying green power. That
means that grid has solar/wind plants connected.
Not to say in most of the states people can install their own grid-tied solar energy system
on |
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e*****r 发帖数: 700 | 39 Tesla’s giant battery in Australia reduced grid service cost by 90%
https://electrek.co/2018/05/11/tesla-giant-battery-australia-reduced-grid-
service-cost/
When an issue happens or maintenance is required on the power grid in
Australia, the Energy Market Operator calls for FCAS (frequency control and
ancillary services) which consists of large and costly gas generators and
steam turbines kicking in to compensate for the loss of power.
Electricity rates can be seen reaching $14,000 per MW during... 阅读全帖 |
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a*****e 发帖数: 2503 | 40 send me your brief introduction please
FCFS
Ms. Ref. No.: RSER-D-16-01486
Title: Technology Roadmap for Smart Grid; A Case Study on Iran Power
Distribution Industry (IPDI)
Renewable & Sustainable Energy Reviews
ABSTRACT:
The Power Smart Grid (PSG) integrates power grid, Information and
Communication Technology (ICT) with the aim of achieving more reliable and
safe power transmission and distribution to the customers. To access this
vision, it is necessary to develop the careful technology road ... 阅读全帖 |
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S********t 发帖数: 18987 | 41 cache 估计第三方的grid有做,
自己直接连数据库的未必,要有这方面的考虑才做,
因为在通常情况下不太有几百列的表直接全部显示的,可能都不需要cache
几百列的表非常不用户友好,
水平移动是这个各案, 但为什么行比列差, 就不太清楚了,
应该还是通常grid没有想到有那么多列吧,
而几百行都是很常见的,
视觉模糊这个是做动画界常用的,
只计算关键桢,过度的都用粗略计算,以节省资源,
象grid这样固定的过度动作,甚至可以预定几个定制的片段 |
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f******g 发帖数: 500 | 42 象前面几位说的,这个从数据存储到用户界面上的设计可能都有些问题。用第三方的
grid control恐怕不行,市面上的大概没有谁会考虑那么多列数。
至于为什么行数多不是问题,那是因为大家都知道在grid的纵向上怎么做paging和
caching。
我的想法是,就象SurfingCat说的意思,你们在横向上也需要做paging,不能每次都把
所有的列都取出来。具体这个query大概会像这样:
select x rows columns m to m+n from XXX ...
这里m代表当前需要显示的横向起始位置。n指每次要取的列数,肯定要大于每一屏可以
显示的。但具体大多少,就要结合你们的系统设计要求和用户体验来找出最佳的数值。
这样做的麻烦是,grid data binding的code多半需要自己来写,不会太难,但可能有
点繁琐。 |
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w*******r 发帖数: 4910 | 43 哈哈,查到了,
那种东西叫grid panel/wall,
链接两个wall的叫GRID PANEL CONNECTOR
上面的小挂钩叫grid hook,Hangrail Bracket
还有台面叫 Shelf |
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k**t 发帖数: 1108 | 45 seems like you r one of the winner in the market of smart grid, well, I
should show my respect to your ideas.
but i am still against the overheating of the so called green energy
resources, which lead booming of smart grid. Of course, there are also other factors triger the idea of smart grid.
be
from |
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m*******r 发帖数: 2044 | 46 看过这个以后,你就可以自由出入DC了,其实很容易的。
http://www.craigslist.org/about/best/wdc/49455908.html
So you've decided to take a trip to your nation's capital. Well here's a few
things you should know that will hopefully help you prepare for your trip.
The DC road grid was laid out by a Frenchman, which explains why locals hate
the French, and also explains much about US Foriegn Policy. Within DC
proper, the roads are laid out in a grid, with other streets crossing the
grid at weird angles, usually through a traff |
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b******n 发帖数: 2212 | 47 握爪
productId=24801&N=1200007&pCategoryId=3939&categoryId=180&Ns=CATEGORY_SEQ_
180&loc=TN&grid
Size=sm&showAll=true&defaultColor=Black&defaultSizeType=Regular
productId=24392&N=1200007&pCategoryId=3939&categoryId=180&Ns=CATEGORY_SEQ_
180&loc=TN&grid
Size=sm&showAll=true&defaultColor=Black&defaultSizeType=Regular
productId=23976&N=1200007&pCategoryId=3939&categoryId=180&Ns=CATEGORY_SEQ_
180&loc=TN&grid
Size=sm&showAll=true&defaultColor=Black&defaultSizeType=Regular
productId=23303&N=1200007&pCate |
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I*****e 发帖数: 15123 | 48 yes. medium has 5 grids
large has 7 grids
maxi has 9 grids |
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y**s 发帖数: 6809 | 49 med = small, 5 grids
large = medium, 7 grids
the one that cutie just posted is maxi = 9 grids |
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