Q*****i
发帖数: 102 | 1 这周或下周开始面试。
Reports to: Manager Technology Risk Analytics and Reporting
Job Description
The Technology Risk Analytics and Reporting Specialist is responsible for
the life cycle of technology risk reporting, which includes requirements
gathering, risk data aggregation, data validation, dashboard design and
maintenance.
Essential Duties and Responsibilities
Risk Data Aggregation
• Identify sources of technology risk data and establish data feeds.
• Define business requirements for risk... 阅读全帖 |
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e******u
发帖数: 6296 | 2 按君之的攻略学做蛋糕，但他的剂量多以g为单位，家里也没有称食品的电子秤。在简
易食谱网找到一个换算：
量器 ：
1 杯 (metric cup) = 250 毫升 cc (ml)
1 湯匙 (tablespoon) = 15 毫升 cc (ml)
1 茶匙 (teaspoon) = 5 毫升 cc (ml)
麵粉 Plain flour (約等於) :
1 杯 (metric cup) ~= 125克 (grams)
1 湯匙 (tablespoon) ~= 9克 (grams)
1 茶匙 (teaspoon) ~= 3克 (grams)
白糖 White sugar (約等於)：
1 杯 (metric cup) ~= 220克 (grams)
1 湯匙 (tablespoon) ~= 15克 (grams)
1 茶匙 (teaspoon) ~= 5克 (grams)
量度换算器见：http://www.christinesrecipes.com/2008/07/1.html
加上屁股着地说10个鸡蛋约1斤，就这么磕磕绊绊的瞎倒腾了。 |
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e******1
发帖数: 149 | 3 这个是newsweek排得，标准如下
The full methodology and weighting is as follows:
Four-year, on-time graduation rate (25 percent): Based on the standards set
forth by the National Governors Association, this is calculated by dividing
the number of graduates in 2012 by the number of ninth graders in 2008, plus
transfers in, minus transfers out. Unlike other formulas, this does not
count students who took longer than four years to complete high school. We
accepted 2011 grad rates from districts that had not ye... 阅读全帖 |
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w********d
发帖数: 270 | 4 Rice is FAR better than USC? Based on what metric?
Just name a few whatever metrics that favor Rice over USC, all of us can
compare those metrics in an objective way!
BTW, I think both Duke and Vanderbilt are FAR better than Rice! |
|
m******h
发帖数: 5753 | 5 google 了一下， 海洋渔业 和海钓
http://www.nwr.noaa.gov/fisheries/management/recreational_fishi
In 2010, over 11 million anglers took part in 72 million marine recreational
fishing trips throughout the United States. Each year, 500 million
saltwater fish are harvested by recreational anglers. In Washington and
Oregon alone, over 417,000 anglers took part in 1.6 million marine
recreational fishing trips in 2010. Annual catch in West Coast recreational
fisheries has ranged from 3,800 metric tons to 5,500 met... 阅读全帖 |
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w***n
发帖数: 9040 | 6 有俩garmin官方视频挺有意思。
介绍新的跑步经济性指标：
Vertical Oscillation: This is simply how much you (specifically, your chest)
goes up and down during each footstep. Basically defining how much
vertical movement you generate, measured in centimeters. The less vertical
oscillation the better, as it means you’re in theory spending less energy
pushing your body up and down vertically (energy which could be used to move
your body forward).
Ground Contact Time: This metric covers how long each footstep spends on the
... 阅读全帖 |
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t****g
发帖数: 35582 | 7 America’s Happiest States
Charles B. Stockdale, March 2, 2012
10. Montana
Well-being index score: 68.0
Life expectancy: 78.4 (24th lowest)
Obesity: 23.0% (6th lowest)
Median household income: $42,666 (11th lowest)
Adult population with high school diploma or higher: 91.7% (3rd highest)
Residents of Montana are generally happy. They rate themselves among the
highest in the nation in both Gallup’s life evaluation and emotional health
categories. Montana has among the most educated adult population... 阅读全帖 |
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w**7
发帖数: 5258 | 8 Has the bubble burst? Is that why camera sales in N. America are down by 43%?
http://visualsciencelab.blogspot.com.au/2013/08/has-bubble-burs
DSLR sales are down this year, worldwide, by 18.5% according to CIPA. The
total decline in the entire dedicated camera market is closer to 43.5% and
mirrorless cameras are seeing about the same year to year decline as
traditional DSLRs. Why?
I think there are two reasons driving this incredible decline. Two bubble
bursting phenomena occurring on top of eac... 阅读全帖 |
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G****r
发帖数: 3924 | 9 America’s Happiest States
Charles B. Stockdale, March 2, 2012
10. Montana
Well-being index score: 68.0
Life expectancy: 78.4 (24th lowest)
Obesity: 23.0% (6th lowest)
Median household income: $42,666 (11th lowest)
Adult population with high school diploma or higher: 91.7% (3rd highest)
Residents of Montana are generally happy. They rate themselves among the
highest in the nation in both Gallup’s life evaluation and emotional health
categories. Montana has among the most educated adult population... 阅读全帖 |
|
e******u
发帖数: 3206 | 10 【 以下文字转载自 ebiz 讨论区 】
发信人: psvita (psvita), 信区: ebiz
标 题: 谈一些和亚麻AZ claim的话题
发信站: BBS 未名空间站 (Sun Mar 6 23:23:12 2016, 美东)
文章版权归psvita所有，转载请勿删除此句。
可能会有错误和误导你的地方，请海涵
亚麻的AZ claim 刚刚修改了规则，以前是开了case，不管你赢还是输，都计算在你的
seller metrics里头。但是现在你要是赢了case, 就不再计算到你的seller metrics里
头。所以如何去赢一个case会比以前更重要。
首先说按照现在的规则，有一些claim是几乎必输的，比如buyer说东西没收到，
tracking显示delivered, 但是你没有购买signature confirmation.以前75刀以下亚麻
还给cover，现在这种一般是判你输，你还要退钱，最最好的结果是亚麻自己替你赔钱
（几率很小了），但是case还是你输了
还有比如说因为签字或者其他的原因，package被hold在shipping carrier那里，... 阅读全帖 |
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T**r
发帖数: 7016 | 11 老大，不好意思，这个贴比较长。
我把NAT搞定了，现在MSVPC guest也能上internet，即使host在公司的VPN上。但是
host
不能看到guest，guest却可以看到host（公司IP）。我需要host能看到guest，因为
guest上
有一些web application需要demo。
whatismyip.com显示两个是同一个IP，而且应该是我VPN的IP，我ISP的IP是75开头，公
司是
144开头。
下面是host 和guest的ipconfig 和route print，其中host里有一些vitualbox和
vmware的遗留下来的一些设置，以前装过，没有搞出来，现在用的是MS VPC。
******************
host ipconfig: *
******************
C:\Documents and Settings\ga2334>ipconfig
Windows IP Configuration
Ethernet adapter VMware Network Adapter VMnet8:
Co... 阅读全帖 |
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x*********n
发帖数: 28013 | 12 这个例子，就是
CPE-------ISP1
-------ISP2
然后呢。用route-map 设metric
比如CPE有2个routes，然后呢，route1我设成next hop到ISP1，route2 设成ISP2，
这样，traffic就跟着什么routes走了。
这个route-map你还可以改成任何attributes，比如，local-preference，比如weight
，比如origin code。。功能是一样的。
一般来说用metric的很少，因为它的priority比较排后，而且实际情况metric不好算。 |
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n**********l
发帖数: 271 | 13 origin is set by the origin AS, usually meaningless for traffic engineering.
Different vendors use origin differently.
A common practice is to rewrite origin in all received routes.
core1.fmt1.he.net> show ip bgp routes detail 8.8.8.8
Number of BGP Routes matching display condition : 15
S:SUPPRESSED F:FILTERED s:STALE
1 Prefix: 8.8.8.0/24, Status: BI, Age: 9d1h58m39s
NEXT_HOP: 184.105.224.254, Metric: 15, Learned from Peer: 216.218.
252.165 (6939)
LOCAL_PREF: 10... 阅读全帖 |
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x*********n
发帖数: 28013 | 14 MED定义是optional-non-transitive
应用的范围一般是inside the AS。
这个non-transitive是only针对forwarding的吗？
我看receiving一点问题也没有啊，
Rack1R1#show ip bgp 24.1.1.0/24
BGP routing table entry for 24.1.1.0/24, version 2
Paths: (4 available, best #4, table Default-IP-Routing-Table)
Advertised to update-groups:
2
200 400
54.1.12.2 from 54.1.12.2 (2.2.2.2)
Origin incomplete, metric 200, localpref 100, valid, external
这个metric不是收到了吗？
问题2，这个收到的metric 200，跟别的IGP有关系吗？比如between AS是ospf，这个
200是怎么算的？ |
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h******r
发帖数: 144 | 15 哦，不好意思，我之前误解你的意思了。。以为你只有一台电脑同时有无线网卡和有线
网卡。
现在看来，你3台机器都有两种网卡，对吧？
你是打算用无线网卡直接接入ATT提供的因特网，用有线网卡连到路由器上组成家庭局域
网对吧？
如果是这样的话，还是很简单。
1。对每台电脑的两个网络连接做如下操作：
无线连接：右键 -> Property -> TCP/IPv4 -> Advanced -> uncheck automatic metr
ic, and set interface metric to be 1
有线连接：同样的操作，但要set interface metric=2
这样回答了你原帖的问题，为啥优先使用无线网，因为在automatic metric情况下，机
器自动选择速度快的连接作为默认网关。
2。然后每台电脑无线接入att，有线直接插在路由器上就应该OK了 |
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s******2
发帖数: 461 | 16 如果最后需要给３０个工厂提供统一的包括３５个的chart（输出的就是一般的bar
chart或 waterfall charts）的powerpoint slides。每个工厂的metrics和chart形式
是相同的，只是数据不同。所有这些数据（有用的和没有用的）是在一个很大的excel
spreadsheet里面(4,000 rows *50 columns, detail as below)，问题是：怎样才能最
快最有效的做出来？
现在我能想到的就是，在这个excel spreadsheet做３０个tab（每个工厂一个），每个
tab里面用把有用的数据做成table，然后做chart。最后，再link这些charts到
powerpoint slides。问题是如果需要修改某一个tab的table，那么为做到一致，要修
改３０次。请问有什么其他办法？多谢。
All the 30 factories have exactly the same metrics..... They will be
measured with 35 same charts/metrics at curr |
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k*******3
发帖数: 1909 | 17 有个问题debug很久没有结果，问题简化如下：
有一个test.pl文件，内容如下
#!/usr/bin/perl
use strict;
use warnings;
my %metrics = ();
$metrics{"Average"} = "SomeValue";
`perl -e 'if(exists \$metrics{\ "Average\ "}){print \ "found\ ";}' > out.txt
`;
运行这个文件perl test.pl, 会产生out.txt，但是为什么out.txt内容是空的，我期待
out.txt的内容是found。百思不得其解，请大牛指教。谢谢！
我在\和"之间故意加了空格，否则网页无法显示\. |
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S**I
发帖数: 15689 | 18 `perl -e '%metrics = (); \$metrics{"Average"} = "SomeValue"; if(exists \$
metrics{\"Average\"}){print \"found\";}' > out.txt`;
This is ugly, though; you should use perl's i/o functions to write to out.
txt.
txt |
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d*******r
发帖数: 3299 | 19 多谢大牛指点。
难道我不能自己开个 python process, 设置一堆 timer，然后再复杂的定时工作都能
搞吗。我准备用 supervisord监控自己的python processes, 然后只用 cron job 定期
监控这一个 supervisord process ... 好像看着 stackoverflow 上有人这么搞: http://serverfault.com/questions/433477/supervisor-vs-cronjob
对了，刚刚用一些 python lib 写了个周期性记录(并上传,绘图) server cpu/memory
使用率的 metrics 的daemon， 我有些问题正想问。
因为现在要给更多的，不同的 metrics 设置不同的搜集 timer (有的30sec采样一次，
有的1min一次)，我准备为不同的 metrics 开不同的 Python thread. 不过听说
Python 的 multiple thread 设计得不好 (我知道有 GIL 拖慢的问题), 所以我想知道
pro 的 python guy，写这种... 阅读全帖 |
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d*******r
发帖数: 3299 | 20
你是指开一个python process来代替cron管理各个复杂的periodic job吧, 我是这么想
的.
我每个 periodic job 的周期和要管理的事情都不太一样, 写在一个thread貌似很乱.
我又不准备自己实现单 thread 的 event-driven framework. 所以我准备针对每一个
periodic job 开一个 python thread 或者 gevent coroutine.
我现在就是每个 AWS EC2 instance 上开一个metric collecting process,
periodically 搜集一些 metrics, 然后 push 到 Librato server 上看图. 我们现在
不存这些 metrics, 就运维时候实时看看, 所以还比较简单. |
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h*****a
发帖数: 1718 | 21 【 以下文字转载自 JobHunting 讨论区 】
发信人: halfsea (Work Hard), 信区: JobHunting
标 题: Pinterest五个engineer的职位推荐
发信站: BBS 未名空间站 (Fri Sep 12 16:43:32 2014, 美东)
我可以推荐以下五个engineer的职位，都是需要比较快fill，希望能马上开始面试。所
以还没毕业的同学就不能考虑了。这几个职位都对background有一定的要求，希望你能
有相关的经验。不能保证每个联系我的人都会有面试，所以先说抱歉。
请联系[email protected]
(function(){try{var s,a,i,j,r,c,l,b=document.getElementsByTagName("script");l=b[b.length-1].previousSibling;a=l.getAttribute('data-cfemail');if(a){s='';r=parseInt(a.substr(0,2),16);for(j=2;a.length-j;j+=2){c=parse... 阅读全帖 |
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m*****e
发帖数: 1506 | 22 Technology Theft: Chinese-owned firm, former DuPont employees are indicted
By Marc S. Reisch
Federal prosecutors have unveiled charges that five people and a Chinese
company—all acting in concert and at the behest of the Chinese government—
over a period of years stole DuPont’s technology to manufacture the white
pigment titanium dioxide.
Two of the people charged were longtime DuPont employees. An industry
analyst says that the firm’s superior process has led it to be a global
leader in TiO2 pr... 阅读全帖 |
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w**a
发帖数: 1024 | 23 我不是很懂，BLACKKNIFE的意思是不是这样的：
假设A,B是R1上的两个一维空间
各自都有自己的METRIC的定义
那么AXB就是二维空间，也就是函数d的domain。
如果讨论函数的连续性，我们就要分别有在DOMAIN上的METRIC和在值域RANGE上的
METRIC。
但是现在在这个二维空间上没有“距离的定义”。 |
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v*********n
发帖数: 573 | 24 http://www1.bbsland.com/education/messages/240997.html
有人分析了田的工作，看来这厮是惯犯:)
yautian's comments on Tian's work are fair, but here are some more
information about these works:
The n=2 case of the KE metric of positive first Chern class was developed
from Tian's thesis by using a trick first found by Siu. Siu gave lectures at
Columbia and other occasions and Tian was in the audience. After that Tian
wrote up a
paper which became part of his thesis. Siu was very angry, and said that
Tian
had moral pr... 阅读全帖 |
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t**********o
发帖数: 26 | 25 田刚的学术腐败绝非偶然
萧荫堂1986年4月在哥伦比亚大学介绍关于Kahler-Einstein度量的工作，田刚在座
，然后到了1986年8月田刚写出一篇文章，完全用的就是萧荫堂在哥伦比亚大学讲座上
所介绍的思想和技巧，只不过写法上改头换面了一下。
Tian, Gang， On Kahler-Einstein metrics on certain Kahler manifolds with $
Csb 1（M）>0$. Invent. Math. 89 （1987）, no. 2, 225--246.
田刚企图将这一成果完全据为己有，他曾想自大的在文章里写上“Siu’s
technique does not work”这样的话，后来干脆在文章中只字未提萧荫堂的贡献。正
如萧在信中所指出的那样，田刚剽窃了萧的想法以后，剩下的计算其实就是在“钉马掌
”，可惜田刚还把马掌钉歪了，反而把一个简单的问题搞得很复杂，见如下萧的文章第
622页。
Siu, Yum Tong The existence of Kahler-Einstein metrics on manifolds w... 阅读全帖 |
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t******a
发帖数: 140 | 26 田刚没动用职权把这篇给拒了？
http://annals.math.princeton.edu/articles/8339
Calabi flow, geodesic rays and uniqueness of constant scalar curvature K&#
228;hler metrics
From to appear in forthcoming issues by Xiuxiong Chen, Song Sun
Abstract
We prove that constant scalar curvature Kähler metric “adjacent” to a
fixed Kähler class is unique up to isomorphism. The proof is based on
the study of a fourth order evolution equation, namely, the Calabi flow,
from a new geometric perspective, and on the geome... 阅读全帖 |
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o****i
发帖数: 23 | 27
谢谢你的回复。这里是想把一个基于最短路径距离的graph metric嵌入到riemannian
manifold, graph metric 肯定是满足三角不等式的。
这个问题可以换个问法，与图论无关：is it true that any finite discrete metric
space can be isometrically embedded into a Riemannian manifold? |
|
o****i
发帖数: 23 | 28
谢谢你的回复。这里是想把一个基于最短路径距离的graph metric嵌入到riemannian
manifold, graph metric 肯定是满足三角不等式的。
这个问题可以换个问法，与图论无关：is it true that any finite discrete metric
space can be isometrically embedded into a Riemannian manifold? |
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h***i
发帖数: 68 | 29 First of all, I think that the part a. of this problem is
not so hard. If you realy have difficulty in this question,
I will give you an answer later.
But I think that the questions b. to d. seem to be wrong.
Here I'll give you an contrexample:
I take X to be the set of real numbres with the normal
metric. And Y be the set of real numbres with the metric
d(u,v)=2. It is not difficult to verify that X and Y are all
complete metric spaces.
Now let O=X*Y\{(x,x)|x in R}. It is obvious that O is a
de |
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c***z
发帖数: 6348 | 30 【 以下文字转载自 DataSciences 讨论区 】
发信人: chaoz (面朝大海，吃碗凉皮), 信区: DataSciences
标 题: [Data Science Project Case] Bias Correction - second try
发信站: BBS 未名空间站 (Fri Jan 24 18:08:30 2014, 美东)
Hi all,
First thank you all so much for your inputs! They were extremely helpful!
Here is what we are doing as a second try (actually maybe 5th try, but we
only count major overhauls here).
Again, any input is extremely welcome! Thanks!
Situation Brief
Project name: Bias correction
Business objective: We have a panel of... 阅读全帖 |
|
g**********l
发帖数: 214 | 31 请问具体是怎么做alignment呢？
用那个你们说的做例子
actual 10% bad rate is group/segment-wide metric.
500分 is individual-wide metric.
这两个怎么凑在一起呢
还有，另外两个segments have only 5% and 1% bad rate (as a segment-wide
metric). they can never have 10% bad rate as a grTFFFoup. sorry i am not
seeing how to align them at 10%.
thanks a lot！ |
|
N*********r
发帖数: 14 | 32 我需要比较randomized controlled test中的study和control两个组，测量一系列的
performance metrics，对每个metric根据两个组的表现在行业中的排名得到一个
percentile（1-100），然后根据事先确定的加权把所有的percentile值相加得到一个
总的评分（以下面的数据为例），请问如果想对这个总评分做significance test应该
用什么方法？谢谢。
Metric Sample Size Weight Control Percentile Study Percentile
1 20000 0.5 60 75
2 10000 0.2 40 90
3 500 0.1 50 50
4 20000 0.3 65 60
5 5000 0.1 30 50
Total 65.5 83.5 |
|
c***z
发帖数: 6348 | 33 Hi all,
First thank you all so much for your inputs! They were extremely helpful!
Here is what we are doing as a second try (actually maybe 5th try, but we
only count major overhauls here).
Again, any input is extremely welcome! Thanks!
Situation Brief
Project name: Bias correction
Business objective: We have a panel of 25M users’ shopping cart information
, we want to infer national online sales by brand and channel. We do so by
finding and applying multipliers to each shopping cart item, based... 阅读全帖 |
|
c***z
发帖数: 6348 | 34 I have been asking the same question to my boss, about the practical use of
this abstract metric...
The reason we can't use k-mean is that these metrics are actually not real
metrics, as they don't follow triangular inequality, and hence the mean
means nothing (convergence of mean doesn't imply convergence of variance).
The only thing I can think of is then hierarchical clustering... |
|
c***z
发帖数: 6348 | 35 阶段性总结
Overall this task can be conducted iteratively between two steps: the
training step using clustering of labeled samples and the bootstrapping step
adding unlabeled samples to increase coverage. Currently we can consider
the first iteration of the training step complete and move on the the
bootstrapping step.
1. 2000+ good and 2000+ bad partners provided；
2. I conducted hierarchical clustering analysis with seven metrics on a set
of good and bad samples, luckily the clusters are highly corr... 阅读全帖 |
|
c***z
发帖数: 6348 | 36 I have been asking the same question to my boss, about the practical use of
this abstract metric...
The reason we can't use k-mean is that these metrics are actually not real
metrics, as they don't follow triangular inequality, and hence the mean
means nothing (convergence of mean doesn't imply convergence of variance).
The only thing I can think of is then hierarchical clustering... |
|
c***z
发帖数: 6348 | 37 阶段性总结
Overall this task can be conducted iteratively between two steps: the
training step using clustering of labeled samples and the bootstrapping step
adding unlabeled samples to increase coverage. Currently we can consider
the first iteration of the training step complete and move on the the
bootstrapping step.
1. 2000+ good and 2000+ bad partners provided；
2. I conducted hierarchical clustering analysis with seven metrics on a set
of good and bad samples, luckily the clusters are highly corr... 阅读全帖 |
|
m******x
发帖数: 35 | 38 有些是lz自己面的有些是各处收集来的 红/绿皮书的题就不贴了 可能有些时间的原因
难免可能记错一些 请大家
包含!~
待lz想起来会不定期更新
---
explain EM algorithm, use EM algorithm to find SVD of a given matrix
---
Assume if you write an online training model, estimate how many obs the
parameters start to converge
Whats the convergence rate of online training algorithm (e.g. stochastic
gradient descent)
Convergence rate of gradient descent?
How many points are needed to converge give dim of feature space ?
Derive gradient descent formula
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reservoir sampling... 阅读全帖 |
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w*******y
发帖数: 60932 | 39 Link:
http://www.lowes.com/pd_359490-25428-86223_0__?productId=353115 Activity-_-Tools TH 11.30.11-_-SC_Tools_TopHero_Area-_-151618_6_Tools-_-X|CenterRail-_-Spcl_Value|Kobalt_8pc_CrossformWrench
8-Piece SAE Crossform Wrench Set
Extended depth box end improves access and provides increased fastener
contact
Set includes: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"
Larger contact area on wrench body provides greater comfort when applying
load to fastener
Link:
http://www.lowes.com/pd_359491... 阅读全帖 |
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O*******d
发帖数: 20343 | 40 这种低级错误竟然发生在NASA， 不可想象啊。
The metric/imperial mix-up
The loss of the craft was the result of several factors, including a design
flaw that resulted in asymmetric torque, software errors in the small
forces model, and management inattention. The metric/imperial
mix-up that destroyed the craft was caused by a human error in the
software development, back on Earth[1]. The thrusters on the
spacecraft, which were intended to control its rate of rotation, were
controlled by a computer that underestimate |
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c**i
发帖数: 6973 | 41 Marshall Eckblad and Curt -Thacker, China-Based Rally Hits Hog Prices.
Futures surge by daily limit after China’s Wen singles out high cost of
pork. Wall Street Journal, July 12, 2011 (title and date in print)
http://online.wsj.com/article/SB100014240
52702303678704576440213768395124.html
("China is the world's largest consumer of pork. * * * Traders interpreted
Mr. Wen's comments as a sign China will look to import more pork to help
stabilize prices, which could fuel an increase in global deman... 阅读全帖 |
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c**i
发帖数: 6973 | 42 (1) Spencer Ackerman, Navy Intel Chief Yawns at China’s New Jet, Missile.
Wired, Jan. 5, 2011 (blog).
http://www.wired.com/dangerroom/2011/01/navy-intel-chief-on-chi
(“'How proficient they [DF-21D missile] are, what that level of
probability is, we don’t know, and frankly I’m guessing that they don’t
know,' Dorsett says")
Note: metric (n): "a standard of measurement
applied directly to happiness — Scientific Monthly>" www.m-w.com
(2) Michael Wimes and Edward Wong,... 阅读全帖 |
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c**i
发帖数: 6973 | 43 (1) You say "中国航空总运载人数和里程数, 居然跟美国是一个数量级上的."
You are asked for data to back up the assertion. Not personal; it is
incumbent of anybody who makes a claim to back it up. Neither you nor Yoh
has done that.
Re: 国家级贫困县重庆巫山将投资13亿元建机场
http://www.mitbbs.com/article_t0/Military/35364905.html
And your assertion simply does not make sense. Come on, China is still
relatively POOR.
(2) United Nations European Commission for Europe (UNECE), for "Transport
Statistics" lists
(a) USA:
•Bureau of Transportat... 阅读全帖 |
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c**i
发帖数: 6973 | 44 Come on, what kind of "metrics" is that? A metric means a benchmark.
And five-year boarding? No yearly data, that is what I said in the previous
posting. Is that a national secret in China? |
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m**********2
发帖数: 6568 | 45 恰恰是因为中国的核能发电比例过低，而煤发电的比例过高。煤燃烧释放的烟尘含有多
种放射性同位
素，包括铀。虽然浓度低，但是量大，持续时间长，接近居民区，而且基本无控制。
A 1,000 MW coal-burning power plant could have an uncontrolled release of
as much as 5.2 metric tons per year of uranium (containing 74 pounds (34
kg) of uranium-235) and 12.8 metric tons per year of thorium.
一个普通大型燃煤火力发电厂每年排放5吨铀（其中含34公斤铀235）
美国在三里岛出事那一年，用于发电的煤排放的辐射相当于155次三里岛事故。 |
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w*********g
发帖数: 30882 | 46 世界经济将再次崩溃，大宗商品市场可能暴跌40%左右
作者：未世民 文章发于：http://blog.sina.com.cn/weishiming12 点击数：3929 更新时间：2011-6-4 荐 【字体：小 大】
【复制本文】 【下载本文】
未世民评论：由欧洲债务危机引发的债券市场动荡未来将进入债务重组阶段，欧洲银行
业的灾难可能使全球面临灾难性的收缩，毕竟欧元也是全球性货币之一，同时欧洲金融
势力也是全球流动性的主要提供者之一，就在前几天兴业银行的两位全球投资策略师看
淡新兴国家的经济趋势，并认为新兴国家是全球最大的神话与泡沫，面临着全面崩盘的
危险，国际对冲基金正疯狂押注一系列国家的货币暴跌，这些问题均将沉重打击全球经
济，恶化相当多的国家的信贷环境与金融，货币体系，下面是标准普尔公司及一些美国
投资分析家的看法，他们认为大宗商品市场未来可能面临着40%---75%左右的超级大调
整，相当多的国家的债务链循环崩坏将使经济与货币崩溃，而这正像下面这篇文章中那
位对冲基金的经理所说，对于另一些人来说这是一次巨大的赚取超额利润的机会。
Chin... 阅读全帖 |
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b******k
发帖数: 36 | 47 里面关于大学排名的那一段甚是喜感
Duke’s partnership with Wuhan University provides a new understanding of
Duke’s planned campus in China, though many concrete details remain
uncertain.
The joint effort between the two schools was announced last week after the
deal to partner with Shanghai Jiao Tong University fell through last summer.
Duke is legally required to partner with a Chinese university before
opening its own institution there. Although Wuhan is not located in the same
province as Kunshan, it has an op... 阅读全帖 |
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c**i
发帖数: 6973 | 48 I am a biologist by training. But it appears you are as ignorant about
rockets as I.
(1) Tiangong 1 weighs merely 8.5 metric tons (hereafter tonnes). Besides
Tiangong 1 on Sept 29, 2011 Long March 2F also launched Shenzhou 5 (in 2003)
, 6 and 7, all into low Earth orbit (LEO), which is defined as "from the
Earth’s surface up to an altitude of 2,000 km."
http://en.wikipedia.org/wiki/Low_Earth_orbit
In comparison:
Geostationary transfer orbit
http://en.wikipedia.org/wiki/Geostationary_transfer_orb... 阅读全帖 |
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