K*****2 发帖数: 9308 | 1 China became the world's largest trading nation in 2013, overtaking the US
in what Beijing described as "a landmark milestone" for the country.
China's annual trade in goods passed the $4tn (£2.4tn) mark for the first
time last year according to official data, after exports from the world's
second largest economy rose 7.9% to $2.21tn and imports rose 7.3% to $1.95tn.
As a result total trade rose 7.6% over the year to $4.16tn. The US is yet to
publish its 2013 trade figures, but with trade totall... 阅读全帖 |
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x****b 发帖数: 584 | 2 去年美国财政赤字达到历史最高记录4590亿美元。可是巴马当政至今财政赤字已达
14000亿美元。比去年的历史最高记录猛增300%.
US deficit 'hits record $1.4tn'
The US budget deficit hit a record $1.4 trillion (£877bn) in the year
to 30 September, US Congress estimates say.
Analysts had predicted a $1.6tn deficit but revised the estimate, which
comes after the end of the US financial year.
The deficit was equal to 9.9% of gross domestic product (GDP) - more than
treble the 2008 level and the highest since the end of World War II.
The surging deficit wa |
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a***u 发帖数: 383 | 3 估计考点是Gauss–Legendre algorithm,
pi = (An+Bn)^2/4Tn
An,Bn,Tn可以由An-1 Bn-1 Tn-1推导得到(递归)。
A0=1 B0=1/sqrt(2) T0=1/4
推导公式要看wiki
上过数值分析的可能学过,问题是谁还能记得这玩意,太强人所难了。 |
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c**i 发帖数: 6973 | 4 徐秀雰, 白银暴跌,民间炒银热情依旧(2). 今日早报 (浙江日报报业集团所属), May
4, 2011.
http://www.chinanews.com/fortune
/2011/05-04/3015453_2.shtml
Quote:
2011年 "5月1日,[货币战争》的作者] 宋鸿兵又在博客中表示,白银比黄金更稀缺,
作为投资,购买白银比购买黄金更划算。'在人类5000年的历史上,金银的比价始终维
持在1∶16左右,现代科学发现,地壳里的黄金和白银储量的比例大约是1∶17。从存量
上看,世界黄金的藏量从1940年的大约3万吨增加到现在的大约15万吨,70年中大约增
加了5倍。与此同时,白银的存量则从30万吨下降到大约3万吨,减少了90%。从绝对数
量上看,目前白银的存量只有黄金存量的1/5。这就意味着,白银比黄金更为稀缺'")
"'美国地质调查局的调查表明,白银将是人类历史上第一种被开采殆尽的金属,时间大
约只有12.3年。' 宋鸿兵说,目前全世界市场上能够买到的白银存量大约是7亿盎司,
按现在每盎司48美元的价格计算,总价值不过336亿美元。这样一个极具诱惑力而且非
常... 阅读全帖 |
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