b***c
发帖数: 2280 | 1 证券公司给账户里的现金头寸的利息非常非常低，买成PVI利息能高不少。
PVI自从2007年11月开始交易以来，价格走势都非常稳定，包括2008年股市巨幅波动的
时候，应该是没什么风险吧？
谢谢指教！ |
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b**s
发帖数: 589 | 2 给点详细情况，变宽变窄？变大变小？
应该不会降解，很短的时间
GPC的原理就是大分子走阳关大道，先出来；小分子钻胡同，绕来绕去后出来
可能情况
1。柱子坏了
2。PVI溶的不好
3。样品不consistent,homogenoues
4。PVI对GPC填充物有吸附？(not sure if it is right) |
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b***c
发帖数: 2280 | 3 PVI自从上市以来价格非常平稳，我想把交易账户里不用的现金趴在它上面，利息收益
高一些。
但是奇怪的是这支走势异常平稳的股票平均日成交量只有8000股，可以长期持有么？有
什么风险？
买入的时候是不是要分多次买入才不至于因为我的买盘导致价格大幅波动？
卖出的时候是不是很难一次性脱手？
急盼赐教！
万分感谢！ |
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z*******g
发帖数: 9 | 5 Poly(1-vinylimidazole) (PVI)
Stable???I do GPC for it 3 times.It changed from time to time.Donno why.....
Thanks! |
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c**i
发帖数: 6973 | 6 (1) Samsung and its attractions | Asia’s New Model Company: Samsung’s
recent success has been extraordinary. But its strategy will be hard to copy
. Economist, Oct 1, 2011.
http://www.economist.com/node/21530984
Quote:
"It is easy to see why China might like the chaebol model. South Korea’s
industrial titans first prospered in part thanks to their close ties with an
authoritarian government (though Samsung was not loved by all the generals)
. Banks were pressured to pump cheap credit into the... 阅读全帖 |
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b**s
发帖数: 589 | 7 找到一片文章，人家是用溶液聚合，跟你的本体聚合不一样。你这是叫自加速现象，
高分子的东东忘光了？呵呵
PVI was prepared by solution polymerization using
2,2'-azobis(isobutyronitrile) (AIBN) as initiator. 1-Vinylimidazole (20 ml)
was dissolved in 50 ml absolute ethanol and dry nitrogen was bubbled through
the solution with vigorous stirring. AIBN (0.04 g) was added to the solution
and polymerization was carried out at 70°C for 40 h. PVI was obtained by
precipitating the ethanol solution in excess THF/hexane (3:8, v/v) solution. |
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z*******g
发帖数: 9 | 8 Yeah,maybe I should ask.....Shouldn't be fake one,though.
The literature is Anal.Chem.1993,65,3512-3517
Something about the PVI is like this:
....Bulk polymerization of PVI was carried out by heating 6ml of
1-vinylimidazole and 0.5g of AIBN at 70oC for 2h under Ar.A dark yellow
precipitate formed soon after heating.After the reaction was allowed to
cool,the precipitate was.....(purification)....The molecular weight of the
polymer was found,by HPLC analusis using a Synchrom Catsec300 column with |
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g*****g
发帖数: 34805 | 10 你说的PVI咋样？好像dividend挺高的。 |
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n******n
发帖数: 12088 | 11 PVI.
分红稳定，价格稳定。另外收益好像是免税的，有谁再确认一下？
只是成交量比较小是个缺点。另外成分债基本都是些长期债券，不明白为何价格那么稳
定。按理说过去一年利率变动很厉害了。 |
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M*****8
发帖数: 17722 | 14 股票符号 日期 最后价 跌幅 百分比
AAR, 20110520, 24.4999, -0.1624, -0.7
AAUKY, 20110520, 23.8300, -0.0513, -0.2
AAWW, 20110520, 63.9700, -1.4313, -2.2
AAXJ, 20110520, 62.6625, -0.3633, -0.6
AB, 20110520, 21.5300, -0.0545, -0.3
ABAX, 20110520, 30.8500, -1.4335, -4.6
ABB, 20110520, 26.3200, -0.0229, -0.1
ABCO, 20110520, 50.9300, -0.4103, -0.8
ABFS, 20110520, 25.3500, -0.7916, -3.1
ABW-A, 20110520, 25.2... 阅读全帖 |
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Z****g
发帖数: 13731 | 15 No. Ticker
1 AKP
2 BJZ
3 BKK
4 BKT
5 CBND
6 CFT
7 CHA
8 CHD
9 CTWS
10 DM
11 EMI
12 FDEF
13 HBAN
14 HHS
15 HSY
16 IILG
17 IQC
18 LWC
19 MBG
20 MJN
21 MLN
22 MRGE
23 MUH
24 NFC
25 NGG
26 NGO
27 NIM
28 NPG
29 NPT
30 NPY
31 ORIT
32 OXM
33 PIA
34 PMO
35 PVI
36 RLH
37 SNN
38 VOQ
39 VRUS
40 WHX |
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w**k
发帖数: 6722 | 16 这里都是ETF
发包子吧
AADR AAIT AAXJ ACIM ACWI ACWV ACWX ADRA ADRD ADRE ADRU
ADZ AFK AGA AGF AGG AGLS AGND AGOL AGQ AGZ AGZD AIA
AIRR ALD ALFA ALTS AMJ AMLP AMPS AMU AMZA AND ANGL
AOA AOK AOM AOR ARGT ARKG ARKK ARKQ ARKW ASEA ASHR
ASHS AUNZ AUSE AXJL AXJS AXJV AYT AZIA BAB BABS BAL
BAR BBC BBH BBRC BCHP BCM BDCL BDCS BDD BFOR BIB BICK
BIK BIL BIS BIV BIZD BJK B... 阅读全帖 |
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c**i
发帖数: 6973 | 18 New York Times today does not report on E Ink. However, its subsidiary
Boston Globe does--because E Ink is based in Cambridge, Massachusetts-- and
explains why does E Ink allows itself to be sold.
Robert Weisman, E Ink finds a buyer far from home; Taiwan company ready to
buy Cambridge start-up. Boston Globe, June 2, 2009.
http://www.boston.com/ae/media/articles/2009/06/02/e_ink_of_cambridge_finds_a_buyer_in_taiwan/
Note:
(a) South Hadley is a town in Western Massachusetts.
(b) Prime View Interna |
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H********k
发帖数: 3950 | 19 Honey, they all use the same screen (e-ink, PVI Taiwan). the reading
experience is exactly the same.
Nook has the same basic internet functions and free 3G wireless. and it has
two screens, one for control, one for reading. and it comes with GAMES.
and with memory slot, all book is FREE to me. never pay $18.99, nor $9.99.
ALL book is FREE! (which part of "ALL BOOK IS FREE" is hard to understand?)
It's hard to NAIL this into female's mindset. hohoho.
this reminds me of..
(it fucking prints money |
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c**i
发帖数: 6973 | 21 Yvonne Yu, Taiwan touch panel production value to increase 36% in 2009, says
DRAMeXchange. Digi Times, June 1, 2009.
http://www.digitimes.com/news/a20090601PR204.html
(“Taiwan touch panel production value is estimated to increase 36% to US$
989 million in 2009 * * * because of surging popularity for touchscreen
functions driven by iPhone and the upcoming Microsoft Windows 7”)
My comment: Instead of decrease due to recession. |
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c**i
发帖数: 6973 | 22 New York Times today does not report on E Ink. However, its subsidiary
Boston Globe does--because E Ink is based in Cambridge, Massachusetts-- and
explains why does E Ink allows itself to be sold.
Robert Weisman, E Ink finds a buyer far from home; Taiwan company ready to
buy Cambridge start-up. Boston Globe, June 2, 2009.
http://www.boston.com/ae/media/articles/2009/06/02/e_ink_of_cambridge_finds_a_buyer_in_taiwan/
Note:
(a) South Hadley is a town in Western Massachusetts.
(b) Prime View Interna |
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k****g
发帖数: 5 | 23 Cool! Thank lichen! I fixed my problem. It is just because PVI chip is
conflict with Matlab 6.0. Following the instruction of that webpage, I figure
it out successfully. Thanks a lot!
I |
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z*******g
发帖数: 9 | 24 大虾帮忙。。
我要做一个本体聚合（BULK POLYMERIZATION)合成PVI，可是这个温度过热问题
简直没办法似的。每次都是到了70度没一秒钟的时间，温度就已经冲上去了，等
在冷却下来，反应已经完了，高分子全部都固化了。
对于这个问题大家有什么好的建议吗？我是想通过这个得到低分子量的高分子。
文献上还说在70度反应2个小时，我就不知道怎么反应2个小时。温度一过热整个
反应液就变成了固体，还反应个啥？
最近被这个折磨死了，先多谢大家了。。。
SIGH.... |
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w******z
发帖数: 29 | 25 what is PVI???? what initiator did you use? |
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w**********y
发帖数: 1691 | 26 In academia, Levy driven O-U process is a popular one.
比如这篇文章:
http://www.kellogg.northwestern.edu/faculty/todorov/htm/papers/pvi.pdf
他给出了GMM的model calibration方法..我对此方法的适用性画一个大大的问号
他另外还有很多文章关于这个方面的.
我dissertation做这个方向,我的理解,大体思路是..先给一个unbiased estimation of
integrated volatility. 然后用一个mean reversion的model去modelling
volatility. |
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