R*R
发帖数: 2661 | 1 谢了，看来确实如此。不过我觉得128个Primary partition基本够用了。
看来GPT比MBR确实先进的很多啊。
partition
lon |
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F********g
发帖数: 475 | 2 Thanks, I tried
sscanf(g_string[g_i-1],"%*[^,],%[^,],%[^,],%[^,],%[^,],%[^,],%[^,],%*s",gps_
data.utc,gps_data.lat,gps_data.lat_s,gps_data.lon,gps_data.lon_s,gps_data.qi
);
and worked.Not sure how safe it is though. |
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F********g
发帖数: 475 | 3 Thanks, I tried
sscanf(g_string[g_i-1],"%*[^,],%[^,],%[^,],%[^,],%[^,],%[^,],%[^,],%*s",gps_
data.utc,gps_data.lat,gps_data.lat_s,gps_data.lon,gps_data.lon_s,gps_data.qi
);
and worked.Not sure how safe it is though. |
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z****e
发帖数: 54598 | 4
你知道我在说什么吗？
我说的没有关联性就是第一是客户和客户数据之间无关联
你在哪里，跟我在哪里，没有关系
这一点决定了很容易scale out，分库可行
其次第二，经度和纬度可以通过直接画正方形来取逼近值
最后再通过画圆来筛选，所以在你画正方形的时候
不需要在乎经度和纬度之间的关系
这一点决定了parallel可行，可以在单个node上启双线程最后汇总后reduce
我最近正好就在思考这个问题
这里可能会涉及到一个meter 2 lat/lon的问题
这个我已经找到答案了
http://gis.stackexchange.com/questions/46729/corner-coordinates |
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z****e
发帖数: 54598 | 5
哦，有趣了，我好像还真的懂这个hashcode是咋回事
要不你给说说，lat/lon这种42.37827837842378的给我hash看看
用哪个prime？ |
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z****e
发帖数: 54598 | 6
把下面这段话好好看看，其次球面几何只有非常精确时候才需要
对于social data来说，这种精确度属于没事找事，做一个大概就可以了
所以一个rect足够用了，连保证50miles这个radius都不需要
这样可以节省其中一步，没有人在乎谁跟谁的距离是不是确切的50miles以内
这个问题最重要的是要解决，第一获取客户location
其次第二，转换miles -> lat/lon，这个比较难，方法参考我给出的link
最后第三，我们用过geohash什么狗屁，couchdb里面就有，叫couchspace还是啥的
结果都觉得很垃圾，全班没有一个人最后选择了这个东西，都是自己搞index
因为没啥难的，就那点东西
发信人: zhaoce (米高蜥蜴), 信区: Programming
标 题: Re: How to Search Users within 50 miles away from me
发信站: BBS 未名空间站 (Thu Jun 18 11:39:01 2015, 美东)
哪里要那么复杂
针对经度和纬度分别建两个index，查找效率是2*lg(n)复杂度，还可以并行... 阅读全帖 |
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z****e
发帖数: 54598 | 7 说说我毕业时候做的这个东西
就是给一个google map
然后根据map上任意一个点，选择一个范围
然后获取social data
是不是跟你做得有点像？
只不过我找的是twits，你找的是user
从本质上说没啥大不了的，无非就是划定范围
然后查找嘛，我连二分tree都懒得用，直接就上index
也没多慢，挺快的，一个简单的reduce就搞定了
这里有优化空间，但是没啥太大意义，除非真的是人数多到这个程度
那我到时候花钱请wdong来做
基本上google api足够用，但是我后来遇到另外一个问题
就是我打算通过server获取google map的image
然后再把这个stream发送给app，那么这个时候
很多api都不管用了，因为我自建server，所以这个时候我得烦恼pixel -> meter ->
lat/lon的转换
麻痹的真难做啊，我给出那个link的python代码看得一知半解的
虽然抄是抄了，但是效果还没测试，所以如果有谁做过的，有现成的java代码的
欢迎给我哈，多谢，不过每次一到这种干货的时候，装逼的几个都尿遁了
习惯了，我已经不抱有任何期待了 |
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z****e
发帖数: 54598 | 8 顺便说一下，我后来这个项目
之所以需要精确计算，是因为觉得google map的work api太贵
屌丝没办法，喜欢在技术上省钱
所以就想自己拼凑出自己需要的static map，只要images就好了
这个时候精确计算出边界很重要，如果边界错误，会导致整个地图tiles无法拼接出来
这都已经不是什么social data能比的了，这种精度如果我自己搞不定
那就先做简化版的，以后卖premium版的向客户收钱
我用static map主要是用在app里面，而且不太想让app访问google
因为怕被封锁，天朝尤其喜欢封锁这种东西，所以想在cloud上找个中介
然后发送image给app，就这么一个思路
然后meter -> lat/lon这个我找了n个贴，只有那个链接中的比较靠谱
其他都比较扯蛋，无非告诉我怎么用google api |
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w*******7
发帖数: 188 | 9 可以试试
webBrowser1.Document.InvokeScript("addMarker", new object[] { lat, lon }); |
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t*******w
发帖数: 51 | 10 System.Web.Script.Serialization.JavaScriptSerializer oSerializer =
new System.Web.Script.Serialization.JavaScriptSerializer();
string strData = oSerializer.Serialize(lat);
string strLon = oSerializer.Serialize(lon);
this.testWeb.InvokeScript("addMarker", strData, strLon); |
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A*******8
发帖数: 1453 | 11 这个是因为这些语言都用拼音文字，所以看到的就想都读出来。虽然在英语里面那个ng
发一个音，但是在其他的很多语言里，ng要发两个音，比如俄语等等，所以他们看到了
long就说lon-g。还比如Hong Kong在法语里面读hon-g kon-g，因为法语里面的hon kon
就已经跟英语的发音基本一样了。 |
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l**********1
发帖数: 5204 | 12 future 学霸教了现小牛一招啊 ps: Matrix did too long lon ago. |
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o*******a
发帖数: 242 | 13 抗青蒿素的虫子出现了。
--------------------
Nat Genet. 2013 Apr 28. doi: 10.1038/ng.2624. [Epub ahead of print]
Multiple populations of artemisinin-resistant Plasmodium falciparum in
Cambodia.
Miotto O, Almagro-Garcia J, Manske M, Macinnis B, Campino S, Rockett KA,
Amaratunga C, Lim P, Suon S, Sreng S, Anderson JM, Duong S, Nguon C, Chuor
CM, Saunders D, Se Y, Lon C, Fukuda MM, Amenga-Etego L, Hodgson AV, Asoala V
, Imwong M, Takala-Harrison S, Nosten F, Su XZ, Ringwald P, Ariey F, Dolecek
C, Hien TT, Boni... 阅读全帖 |
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A******y
发帖数: 2041 | 14 Sorry, it is Lon protease. |
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h****o
发帖数: 343 | 15 多谢回复，关于移民与非移民倾向，你回答得很具体，基本也和我的想法一致，不过码
了这么多字，表示感谢！
关于job offer，不知道postdoc算不算是一个工作，如果算，那我争取申请一个，不过
年龄大了，一直在工业界，转academia估计也比较难。到不是自己怕难，作为life-lon
g learner，我是没问题，不过老板们很难相信我这个年龄还能转向，从industrial ci
rcle转到academia，而且这10年间也没有paper。
另外我走领馆程序，不提交485。但要提交一大堆别的原件:-(
最感激是对postdoc的提出，选择多了一条路。最近一直只在monster, careerbuilder,
indeed找工业界的工作，没一个反馈。postdoc这个新思路相当赞。 |
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t*****u
发帖数: 365 | 16 博后的offer可以，算non-profit的工作。如果能找postdoc，比工业界工作应该好找一
点。
lon
ci
careerbuilder, |
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h****o
发帖数: 343 | 17 多谢回复，关于移民与非移民倾向，你回答得很具体，基本也和我的想法一致，不过码
了这么多字，表示感谢！
关于job offer，不知道postdoc算不算是一个工作，如果算，那我争取申请一个，不过
年龄大了，一直在工业界，转academia估计也比较难。到不是自己怕难，作为life-lon
g learner，我是没问题，不过老板们很难相信我这个年龄还能转向，从industrial ci
rcle转到academia，而且这10年间也没有paper。
另外我走领馆程序，不提交485。但要提交一大堆别的原件:-(
最感激是对postdoc的提出，选择多了一条路。最近一直只在monster, careerbuilder,
indeed找工业界的工作，没一个反馈。postdoc这个新思路相当赞。 |
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t*****u
发帖数: 365 | 18 博后的offer可以，算non-profit的工作。如果能找postdoc，比工业界工作应该好找一
点。
lon
ci
careerbuilder, |
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a*****g
发帖数: 19398 | 19 Chicago State official sues UIC officials over her dissertation
http://www.chicagotribune.com/news/local/breaking/chi-chicago-s
-sues-uic-officials-over-her-dissertation-20140721,0,435088.story
A high-ranking administrator at Chicago State University is suing University
of Illinois at Chicago officials after a Chicago Tribune story earlier this
year about her dissertation, alleging people at the school illegally disclo
sed private facts about academic matters, among other allegations.
Angela Hen... 阅读全帖 |
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s******y
发帖数: 4 | 20 I think my tutor is now neither of the both except
who deals with administrative affairs everyday,although we still
have much disscution without help to me .
I am a freeman and feel somewhat lonly because the boss has no interests
on theory and nor does anybody around.sigh~ |
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s****e
发帖数: 2934 | 21 ☆─────────────────────────────────────☆
fishclistoff (一切靠人品) 于 (Wed Sep 6 12:20:38 2006) 提到:
got a question when reading a paper:
"After polystryene/toluene spin-coat, it was dried for 4 days at 70 C".
Why it needs such a long baking time, any particular reasons?
A beginner for polymer, thanks for helping out.
☆─────────────────────────────────────☆
dena (dean) 于 (Wed Sep 6 20:53:41 2006) 提到:
Probably some difunctional styrenes or curing points such as epoxy group in
it so that a lon |
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O********9
发帖数: 59 | 22 The data model of compressive sensing is y=A*x+e. y is an M-dimensional
vector of measurements, A is an M by N matrix, x is an N-dimensional vector
of signal and e the noise vector. There is only a limited number of
measurements, meaning M
signal x from y by making use of the fast that x is a sparse vector.
If M>N, then one can estimate x by maximum-likelihood (equivalent to least-
squares method). However, when M |
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O********9
发帖数: 59 | 23 The data model of compressive sensing is y=A*x+e. y is an M-dimensional
vector of measurements, A is an M by N matrix, x is an N-dimensional vector
of signal and e the noise vector. There is only a limited number of
measurements, meaning M
signal x from y by making use of the fast that x is a sparse vector.
If M>N, then one can estimate x by maximum-likelihood (equivalent to least-
squares method). However, when M |
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w*********s
发帖数: 2136 | 24 Reported Cases in Ukraine Double in Two Days
November 4, 2009
478,456 Influenza/ARI
24,003 Hospitalized
60 Ventilators
81 Deaths
The above numbers are from the latest update from Ukraine. The number of
infected patients has almost doubled to just under ½ million, compared
to the report two days ago (see map http://flutracker.rhizalabs.com/flu/gmap0910300830.html?lat=50.064191736659104&lon=31.640625&zoom=6). Hospitalized patients also have
spiked higher, to 24K from 15K. ICU cases are |
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s******e
发帖数: 696 | 25 【 以下文字转载自 Investment 讨论区 】
发信人: tonys (基因决定人生), 信区: Investment
标 题: [link]What Happened to the Quants in August 2007?
发信站: BBS 未名空间站 (Sun Sep 23 21:08:49 2007)
http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1015987
Abstract:
During the week of August 6, 2007, a number of high-profile and highly
successful quantitative long/short equity hedge funds experienced
unprecedented losses. Based on empirical results from TASS hedge-fund data
as well as the simulated performance of a specific lon |
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B*D
发帖数: 5016 | 26 http://goo.gl/TXhT6E
New Yorker的专栏
HOW DO HEDGE FUNDS GET AWAY WITH IT? EIGHT THEORIES
The other day, I asked how hedge funds manage to bestow such great riches on
their managers despite the fact that, in many cases, their performance seem
s pretty ordinary. That got quite a reaction. The responses ranged from clai
ms that hedgies are remunerated perfectly appropriately to charges that they
are outright crooks who prey on gullible and greedy investors. Because the
industry has grown enormously i... 阅读全帖 |
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c*****r
发帖数: 2426 | 28 严格说来，teflon的熔点是327C，分解温度是在360C以上（摘自Aldrich catalog），考
虑到大家的锅都是反复受热，至少偶的锅每天怎么都得煎三两个荷包蛋的，400度以上tef
lon肯定是受不住的。不过大家可以放宽心，偶这里列一下家庭cooking常用的几种油的沸
点：
Safflower - 510 F (266 C)
Soybean - 495 F (257 C)
Corn - 475 F (246 C)
Peanut - 440 F (227 C)
Sesame - 420 F (216 C)
Olive - 375 F (191 C)
（摘自http://van.hep.uiuc.edu/van/qa/section/States_of_Matter_and_Energy/Boili
ng_Evaporating_and_Condensing/20010430135040.htm）
这些油的沸点都远低于teflon的分解温度，所以用teflon的锅炒菜还是很安全的，大家平
时不用滚油煎鸡蛋的吧，就算是爆炒，只要锅翻的勤一些不造成局部过热也是没有问题的
。唯一需 |
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r*******r
发帖数: 2554 | 30 很赞老塔这种 out of box的思维。
关于中新版的问题，老塔说得挺透彻的。其实现在的情况，军版已经基本取代了以前的
cn版，版中讨论的风气也不错。军版以小将居多，salon以老将居多，各自得一阵营，其
实这样挺好。
当然，其实不管中新版改名也好，取消也好，都不能从根本上解决问题。即使取消中新
版，现在发生在中新版的情况，将来仍然会存在，因为根源问题并没有消失。所以相对
较优的选择，可以是：
1。如果不想取消中新版。那么选择一个与较为中立，且与CN两边阵营纠葛不多的ID出任
版主。情况可能会稍微好些，但争吵是免不了的。
2。如果打算动一动CN版。站长可以3个月之内不任命cn版主，看看情况会如何。按照这
个版目前的情况，中新版很快就会加速流失ID，更多的小将会流向军事版。CN将成为sa
lon的copy。如果情况果真如此的话，老塔的建议是可取的。 |
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L***s
发帖数: 920 | 31 听朋友说链接看不到全文，在这里
China Treads on New Turf
SYRACUSE, N.Y.—Chinese construction-equipment makers are burrowing into
Caterpillar Inc.'s backyard and they're counting on people like Lon Coon to
do it.
The Syracuse native runs Stephenson Equipment Inc.'s upstate New York
operations. For decades, Stephenson had focused on selling and renting out
cranes and paving equipment.
But Mr. Coon says that last year he decided to branch out into "the dirt
business"—excavators, backhoes and other earth-moving equ... 阅读全帖 |
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h*****o
发帖数: 1476 | 32 【 以下文字转载自 DC 俱乐部 】
发信人: hello6000 (hello), 信区: DC
标 题: 1楼 周日6.26 Hiking-Cash Lake. Everything is done！
发信站: BBS 未名空间站 (Thu Jun 9 19:21:39 2011, 美东)
EXCEPT 最后聚餐的饭馆。不着急的，呵呵。
细节如下！首先感谢HONEY，XIAOCHUANG， ICQ， 他们是这次活动的实际的发起者，操作者！
名字：Patuxent NWR Cash Lake Loop: Laurel, MD 2 - 4 miles
地图GOOGLE：Cash Lake 或地址 10901 Scarlet Tanager Loop, Laurel, MD 20708
电话：301-497-5760
建筑 National Wildlife Visitor Center
登记报名的link：
http://tinyurl.com/dc-club-2011
开车和停车路线
Trailhead: From the Baltimore Washington Pa... 阅读全帖 |
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p********y
发帖数: 5141 | 33 Chrissie stated in her biography that she developed eating disorder twice
while she was in Uni. And today I come across this article on Hollie Avil
quitting pro triathlon career. Over the weekend, a news on "cutting the
Briton's fattest (yep, some media use this word) teen free from her home"
also caught my eyes.
Eating disorder seems to be quite a problem in young females, while they are
looking for self-assurance, and reassurance from peers. In Asia, the bar of
overweighted is much higher than... 阅读全帖 |
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s**a
发帖数: 433 | 41 ============================================
Unchained Melody
原唱：The Righteous Brothers
翻唱：Sega
============================================
oh, my love, my darling
i've hungered for your touch a long, lon
ely time.
and time goes by so slowly and
time can do so much,
are you still mine?
i need your love
i need your love
god speed your love to me!
lonely rivers flow to the sea
to the sea
to the open arms of the sea.
lonely rivers sigh
"wait for me, wait for me!"
i'll be coming home
wait for me!
o |
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r****n
发帖数: 8253 | 42 【 以下文字转载自 Wisdom 讨论区 】
发信人: serawang (皇叔郎), 信区: Wisdom
标 题: [合集] wisdom的严肃传统，始于waichi的远程治病
发信站: BBS 未名空间站 (Sat Jun 20 10:59:37 2009, 美东)
☆─────────────────────────────────────☆
zhubajie (莫装托，装托遭雷劈) 于 (Wed Apr 29 21:26:32 2009) 提到:
他是很认真严肃的表演双簧，
大家都感受到了。
可为什么waichi就是不承认呢。
☆─────────────────────────────────────☆
leonany (Cagalli Yula Athha) 于 (Wed Apr 29 21:31:06 2009) 提到:
八戒你快扫个盲，这里不行发到别的版么
☆─────────────────────────────────────☆
zhubajie (莫装托，装托遭雷劈) 于 (Wed Apr 29 21:31:52 2009) 提... 阅读全帖 |
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l**t
发帖数: 10440 | 43 最终名单(11人):
BTR(2)/Skyaer(2)/lint(3)/ylyld(2)/patrol/miaowu
Car Pool名单:
BTR(2)/lint/ylyld(2)/miaowu,共6人,如想自己过去(不建议),
请PM
集合时间: Oct 3 Sat, 5:00AM
集合地点：10101 N WOLFE RD , CUPERTINO , CA 95014
In the parking lot of Vallco Fashion Park (including stores like Sears,
Macy’s), which is at the intersection of N. Wolfe Rd. and Stevens Creek
Blvd, close to hw-280
目标地点: 10 Capistrano Road, Princeton by the Sea, CA 94019 (Yahoo Map: http://maps.yahoo.com/#mvt=m&lat=37.503567&lon=-122.4839&zoom=15&q1=10%2 |
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l**t
发帖数: 10440 | 44 最终名单(8人):
BTR/Skyaer/lint(2)/ant/patrol/miaowu/leapfrog1
Car Pool名单:
BTR/lint/ant/patrol/miaowu/leapfrog1,共6人,如想自己过去(不建议),请PM
集合时间: Oct 11 Sun, 5:00AM
集合地点：10101 N WOLFE RD , CUPERTINO , CA 95014
In the parking lot of Vallco Fashion Park (including stores like Sears,
Macy’s), which is at the intersection of N. Wolfe Rd. and Stevens Creek
Blvd, close to hw-280
目标地点: 10 Capistrano Road, Princeton by the Sea, CA 94019 (Yahoo Map: http://maps.yahoo.com/#mvt=m&lat=37.503567&lon=-122.4839&zoom=15&q1=1 |
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