F****n
发帖数: 438 | 1 【 以下文字转载自 Medicalpractice 讨论区 】
发信人: FeiLun (Is Horrible), 信区: Medicalpractice
标 题: 几篇期刊文章
发信站: BBS 未名空间站 (Sat Jul 12 22:36:30 2014, 美东)
那位大侠可以帮组查一下这几篇的全文吗？叩谢。
请发：y******[email protected].
I.
Role of small-conductance calcium-activated potassium channels in atrial
electrophysiology and fibrillation in the dog.
Qi XY1, Diness JG, Brundel BJ, Zhou XB, Naud P, Wu CT, Huang H, Harada M,
Aflaki M, Dobrev D, Grunnet M, Nattel S.
Author information
Abstract
BACKGROUND:
Recent evidence points to functional... 阅读全帖 |
|
m****c
发帖数: 44 | 2 为什么resample会改变audio file的duration呢？我现在想把一个48KHz的wav file改
成8KHz.怎么不管用什么tool,(praat,audacity,etc)，它的duration都变了呢？有没有
preserve duration的方法？
谢过了 |
|
m****u
发帖数: 3915 | 3 例如这样一个程序：
#include "time.h"
#include "stdio.h"
#include "stdlib.h"
int main(void)
{
clock_t c_start,c_end;
double duration;
c_start = clock();
//My code here ....
c_end = clock();
duration = (double)(c_end - c_start)/CLOCKS_PER_SEC ;
return 0;
}
在32bit机器上，当执行时间过长时(>2000秒), clock()函数会归零重新计时，导致最
后duration为负数，各位大大有什么解决方法不？
（我知道用time()和difftime()可以，但是我现在在一个公用机器上run，用这两个函
数会受其他进程影响，导致结果不准确，有没有用clock()，但是不溢出的方法）
多谢 |
|
k****e
发帖数: 126 | 4 If a[][] is declared as static storage duration then it will certainly go to
.data segment. If not, the compiler will probably use immediate value
instead.
If you compare the following, (gcc version 4.5.3 -O0)
(1) array a[] has "auto" storage duration.
#include
#include
int foo()
{
int a[] = {3, 4, 5};
return a[2];
}
int main(void)
{
int temp;
temp = foo();
printf("%d", temp);
return 0;
}
Sections:
Idx Name Size VMA LMA File ... 阅读全帖 |
|
U******u
发帖数: 5829 | 5 shyj: 我的考版match路--以此文纪念在美国逝去的10年青春
http://mitbbs.com/pc/pccon_2289_t379_150975.html
发信人: shyj (baobao), 信区: MedicalCareer
标 题: 我的考版match路-以此文纪念在美国逝去的10年青春 (很长很罗嗦，慎入！）
发信站: BBS 未名空间站 (Sat Apr 3 17:31:55 2010, 美东)
Match的结果终于尘埃落定，周1等电邮的时候非常紧张，因为成败就在此了，虽然一直
告诉自己，今年只是热热身，成败都可以接受，但到真的揭晓的时候，还是很紧张，毕
竟一旦卷入其中就身不由己，何况自己也还是有所付出。到周4等match program的时候
虽然也有点紧张，但程度已经大大减少，1个原因是毕竟match上才是头等大事，去哪里
尚在其次，还有1个原因是心理还是有所准备了，虽然希望留在home school，但直觉告
诉我恐怕是非常困难了，在我rank list上第二位的program应该就是我要去的地方，果
不其然。经过几天的等待，发现果然是要搬家了。
对于我... 阅读全帖 |
|
l**********1
发帖数: 5204 | 6 需要genome 生统的背景
比如 H 大 以下 两lab (NB: one now is at Stanford)
//biosun1.harvard.edu/complab/
的至少one first author a paper 那样的背景
sunny 再去修个MD 如何
one mentor:
//www.hsph.harvard.edu/faculty/frank-hu/
cited from last week Cell cover article:
pp393
>With respect to the first question, replication initiation occurs
>as DnaA protein monomers bind or unbind stochastically and
cooperatively to form a multimeric complex at the replication
origin (Figure 4B, top) (Browning et al., 2004). When the complex
is c... 阅读全帖 |
|
g*********5
发帖数: 2533 | 7 Isolation of nuclei for the co-IP and whole ChIP protocols is based on the
methods of Gendrel et al. (2002, 2005), Johnson et al. (2002), and Nelson et
al. (2006).
METHOD
For extraction and co-IP of nuclear proteins, see Steps 1-39 (Fig. 1). For
the ChIP procedure, see Steps 40-69 (Fig. 2).
Figure 1.
View larger version:
In this page
In a new window
Figure 1.
Flowchart for the timeline and organization for co-IP of nuclear proteins
from Arabidopsis seedlings.
Figure 2.
View larger versio... 阅读全帖 |
|
d****i
发帖数: 123 | 8 Position 1: Research Fellow (RF)
Desired Background: graded-index materials, and transformational optics (
experimental experience would be additional plus)
Qualification for RF: doctorate degree in physics, optics, mechanical
engineering, or related disciplines; strong publication record; contract
duration (maximum 2.5 years, which can be extended based on mutual
satisfaction upon maturity)
Position 2: Postdoctoral Fellow (PDF)
Desired Background: plasmonic metamaterials, nanophotonics
Qualif... 阅读全帖 |
|
x*p
发帖数: 78 | 9 【 以下文字转载自 JobHunting 讨论区 】
发信人: xop (xop), 信区: JobHunting
标 题: intern / consulting opening 三菱电机实验室(波士顿)
发信站: BBS 未名空间站 (Tue Nov 21 11:58:52 2017, 美东)
三菱电机实验室 Intern 职位：
Mitsubishi Electric Research Labs:
Intern ID: 1179
Host: RUI MA
Duration: 13 weeks
ID: EC1179
TITLE: Internship: Computational Intelligence in Radio-Frequency Circuit
Design and Optimization
DESCRIPTION: MERL is looking for an Senior Ph.D. student to work on
developing a generalized and efficient framework for comput... 阅读全帖 |
|
m******a
发帖数: 1639 | 10 取得24学分llm program的情况下考bar?
我读了新规定：
if the applicant does not meet the durational equvalency requirements of
this paragragh but has at least two years substantively equivalent education
or if applicants does not meet the requirements of the subparagrah(i) of
this paragragh that applicants may cure either the durational or substantial
deficiency, but not both, by satisfactory proof that 申请者读完了full time
or part time的aba approved的法学院的llm.
这里所说的substantial deficiency and durational deficiency对于国内两年制法... 阅读全帖 |
|
z*******2
发帖数: 2643 | 11 acute lower back pain duration less 4 weeks.
chronic back pain duration grater 12 weeks.
the duration time is different. |
|
F****n
发帖数: 438 | 12 【 以下文字转载自 Medicalpractice 讨论区 】
发信人: FeiLun (Is Horrible), 信区: Medicalpractice
标 题: 几篇期刊文章
发信站: BBS 未名空间站 (Sat Jul 12 22:36:30 2014, 美东)
那位大侠可以帮组查一下这几篇的全文吗？叩谢。
请发：y******[email protected].
I.
Role of small-conductance calcium-activated potassium channels in atrial
electrophysiology and fibrillation in the dog.
Qi XY1, Diness JG, Brundel BJ, Zhou XB, Naud P, Wu CT, Huang H, Harada M,
Aflaki M, Dobrev D, Grunnet M, Nattel S.
Author information
Abstract
BACKGROUND:
Recent evidence points to functional... 阅读全帖 |
|
d****i
发帖数: 123 | 13 Position 1: Research Fellow (RF)
Desired Background: graded-index materials, and transformational optics (
experimental experience would be additional plus)
Qualification for RF: doctorate degree in physics, optics, mechanical
engineering, or related disciplines; strong publication record; contract
duration (maximum 2.5 years, which can be extended based on mutual
satisfaction upon maturity)
Position 2: Postdoctoral Fellow (PDF)
Desired Background: plasmonic metamaterials, nanophotonics
Qualif... 阅读全帖 |
|
r**u
发帖数: 69 | 14 low-coupon/long-maturity is referring to the same thing (long duration).
and vice versa for the other direction.
it helps if you think of CF in the following way:
Futures Settle Price * Conversion Factor
= Price of Bond with 6% Yield
= Cash Flow discounted at 6%
Now for the same cash flow, if you have to move up from 6%, you would prefer
to have a longer duration to make bond price cheaper. If you are moving
down from 6%, you would prefer to have shorter duration, which makes the
delivery less e |
|
d******9
发帖数: 404 | 15 ***QUESTION 47
Which one of the following statements is true regarding the name of a SAS
array?
A. It is saved with the data set.
B. It can be used in procedures
C. It exists only for the duration of the DATA step
D. It can be the same as the name of a variable in the data set.
Answer: C
我的确没有见过array用于proc step，但不明白为什么不能用呢？（why B is not
true, or say why array can only exist for the duration of the data step?)
Array is just a grouping of data, not a new dataset. it can not be used in
... 阅读全帖 |
|
c***z
发帖数: 6348 | 16 Some of the projects I worked on:
Mortgage operations efficiency and duration modeling: path analysis and
duration analysis
Mortgage banker contribution and retention modeling: duration analysis and
logit models
Market data movement monitoring: K-S test
Recovery of Suspended Loans: logit models and decision trees
Anticipated Mortgage Closing Date: linear models
Though the important thing at work is to deal with missing data, biased data
, outliers, etc; as well as to understand the business. Mod... 阅读全帖 |
|
z*******2
发帖数: 2643 | 17 acute lower back pain duration: less 4 weeks.
chronic back pain duration: grater 12 weeks.
the duration time is different.
MRI? |
|
F****n
发帖数: 438 | 18 来自主题: Medicalpractice版 - 几篇期刊文章 那位大侠可以帮组查一下这几篇的全文吗？叩谢。
请发：y******[email protected].
I.
Role of small-conductance calcium-activated potassium channels in atrial
electrophysiology and fibrillation in the dog.
Qi XY1, Diness JG, Brundel BJ, Zhou XB, Naud P, Wu CT, Huang H, Harada M,
Aflaki M, Dobrev D, Grunnet M, Nattel S.
Author information
Abstract
BACKGROUND:
Recent evidence points to functional Ca2⁺-dependent K⁺ (SK)
channels in the heart that may govern atrial fibrillation (AF) risk, but the
underlying mechanisms are... 阅读全帖 |
|
i****x
发帖数: 17565 | 19 我的理解，这类系统都是控制气门的开闭时机(timing/duration)和张开的总高度(lift
)，而vtec是最早实现商用的，最初实现的方法是camshaft上有两套凸起，用液压切换。
因为只有两套，所以切换时感觉很明显。低转一脚油踩下去，扭矩增加到一个平台感觉好像
该下滑了，又突然猛增到第二个平台，很爽：）
其他家后来都用各自不同的方法实现了同样的结果——timing、duration和lift控制，
其中大部分比vtec还先进，能够实现无级变换。本田后来的i-vtec也实现了无级变换
timing，但lift和duration还是两组。最新的a-vtec实现了三者都无级变换，但好像没
有商用，可能ivtec就够好了。
Different types of variable valve timing and lift control systems have
also
been produced by other manufacturers (MIVEC from Mitsubishi, AVCS from
Subaru, VVT-i/VVTL-i from Toyota, V... 阅读全帖 |
|
W***n
发帖数: 11530 | 20 Flood Control and Drainage
The Chicago area is topographically dominated by the glacial Lake Chicago
plain. This plain encompasses the Chicago River, Des Plaines River, and the
Calumet River. Early explorers discovered the Chicago Portage, an area
within Mud Lake that was only 15 feet above the level of Lake Michigan and
on the watershed divide between the Mississippi River basin and the Great
Lakes basin.
The Chicago area experienced many early drainage challenges. The natural
condition was swa... 阅读全帖 |
|
A*Q
发帖数: 1579 | 21 Perhaps the most striking feature of the Great Recession is that those
without jobs are enduring the longest spells of unemployment recorded in the
post-WWII era. At the start of the recession, in December 2007, the median
duration of unemployment was 8.4 weeks. By June 2009, the median duration
had risen to 17.4 weeks. It continued to rise beyond the end of the
recession and peaked at 25.5 weeks in June 2010.
美国的失业率和失业期已经很严重。
美国政府一再延长失业可以领取失业金的期限，不然美国就是茉莉花革命的中心。
其副作用是美国政府一再借债，现在每新借的一块钱有0.42是还的利... 阅读全帖 |
|
r*****3
发帖数: 6442 | 22 别扯蛋，我那个是往返价。
就是今天６月７号的价。今天说事，你整个６月１０号，搞笑呢。
说单程也行
expedia上
Select your departure to San Francisco Fri, Jun 07
Prices are oneway per person, includes all taxes and fees. Additional
baggage fees may apply.
Your recent searches
Denver to San Francisco
Fri, Jun 07
Cheapest flight was $316 one way
Searched 59 minutes ago
Ad
Run this search Denver - San FranciscoJun 7 on these other sites:
Cheap flights from Denver to San Francisco
Book and Save as much as 40% to 65% on Flight Tickets
... 阅读全帖 |
|
s*****V
发帖数: 21731 | 23 The testing was carried out on different routes throughout Manhattan,
including M20, M42, M104, M98, M60 and Bx27. The total distance covered
during the trial was 1,481 miles. The BYD all-electric bus “performed
excellent” with an average battery consumption of 1.4 miles per % SOC,
translating to over 140 miles per full charge in heavy traffic. The average
speed of electric bus was ~4 miles per hour under Manhattan’s heavy traffic
. After two months of running, the electric bus’s average battery... 阅读全帖 |
|
|
G****e
发帖数: 1912 | 25 https://www.theepochtimes.com/scientific-puzzles-surrounding-the-wuhan-novel
-coronavirus_3225405.html
Scientific Puzzles Surrounding the Wuhan Novel Coronavirus
BY YUHONG DONG February 3, 2020 Updated: February 6, 2020FONT BFONT SText
size Print
Analysis
The sudden outbreak of the Wuhan Novel Coronavirus (2019-nCoV) has resulted
in all of China’s Hubei Province and three major cities in Zhejiang
Province being subjected to quarantine. Other nations are anxiously trying
to get their people out o... 阅读全帖 |
|
w******n
发帖数: 13172 | 26 关于天波雷达：* OTH Radar - Has a range of 800 to 3000 km. The accuracy in
targetting is around 20 to 30 km. This can be improved to 2 to 3 km with
improved algorithm. OTH radar can work with the recon satellites to provide
more accurate targeting info.
http://www.informationdissemination.net/2009/03/plan-asbm-development.html
Saturday, March 28, 2009
PLAN ASBM development
I was contacted by Galrahn to read over a Chinese blog entry on PLAN's ASBM
development (found here) and post my thoughts on it.
I ... 阅读全帖 |
|
H****r
发帖数: 16240 | 27 又去看了A老兄的文
发现我记性太差，再次把tier几理解成各个单位的战斗能力问题了……
按照他的解释——“光猜就知道多半是被这个tier 2给理解成2流了。tier 1的一个重
要属性是管的范围是全球”
“像普通印章和FR啥的是tier 2不能简单理解为2流。”
“事实上很关键的一点是有没有支援单位”
The modern approach to SOF coalition warfare involves the designation of a
Lead Nation for a given operation or campaign. That nation provides a major
force contribution, as well as the nucleus of the command and control, staff
and support infrastructure. The Lead Nation is also expected to provide or
assist in the provision of key capabilities, ... 阅读全帖 |
|
W***n
发帖数: 11530 | 28 Flood Control and Drainage
The Chicago area is topographically dominated by the glacial Lake Chicago
plain. This plain encompasses the Chicago River, Des Plaines River, and the
Calumet River. Early explorers discovered the Chicago Portage, an area
within Mud Lake that was only 15 feet above the level of Lake Michigan and
on the watershed divide between the Mississippi River basin and the Great
Lakes basin.
The Chicago area experienced many early drainage challenges. The natural
condition was swa... 阅读全帖 |
|
l******a
发帖数: 3803 | 29 Obama administration defends collecting phone records
By Julie Pace / AP White House Correspondent /
WASHINGTON (AP) — The Obama administration on Thursday defended the
National Security Agency’s need to collect telephone records of US citizens
, calling such information ‘‘a critical tool in protecting the nation from
terrorist threats.’’
While defending the practice, a senior administration official did not
confirm a newspaper report that the NSA has been collecting the telephone
records of mil... 阅读全帖 |
|
l****z
发帖数: 29846 | 30 Published on CNS News http://www.cnsnews.com
Menendez Is 2nd Dem to Oppose Iran Deal: ‘Hope…Is Not a National Security
Strategy’
(CNSNews.com) – Twelve days after Sen. Chuck Schumer (D-N.Y.) became the
lone Democratic senator to declare opposition to the administration’s Iran
nuclear agreement, a second senior Democrat has joined him, with Sen. Robert
Menendez (D-N.J.) announcing Tuesday that he too will vote against the deal.
In a speech [1] laying out in detail his reasons for opposing the J... 阅读全帖 |
|
d**g
发帖数: 167 | 31 County of Nassau v Levine
2010 NY Slip Op 20305 [29 Misc 3d 474]
July 12, 2010
Kluewer, J.
District Court Of Nassau County, First District
Published by New York State Law Reporting Bureau pursuant to Judiciary Law
§ 431.
As corrected through Wednesday, November 17, 2010
[*1]
County of Nassau, Plaintiff,
v
Samuel M. Levine, Defendant.
District Court of Nassau County, First District, July 12, 2010
APPEARANCES OF COUNSEL
Samuel M. Levine, Long Beach, defendant pro se. John Ciampoli, County
Attorney... 阅读全帖 |
|
c****p
发帖数: 6474 | 32 如果他们还允许appeal的话，可以再试试，一来多次机会，二来多出些时间准备backup
plan。
后面是和OPT reporting有关的原文。
只有三种状况需要report
1. Change of name
2. Change of address
3. interruption of employment.
你老公的情况是employment并没有interrupt，并没有被明确地列为需要报告的项目。
即使从paid到unpaid被“默认”为interruption的话，也是因为法条叙述不明，并不是
当事人有意违反。
(i) General . An F-1 student who is authorized by USCIS to engage in
optional practical training (OPT) employment is required to report any
change of name or address, or interruption of such employment to the DSO for
the duration of ... 阅读全帖 |
|
h********n
发帖数: 427 | 33 American AA 3701
Depart Tue, Dec 28 3:45pm DCA - Washington National Apt DC
Arrive Tue, Dec 28 4:50pm ORD - Chicago OHare IL
American AA 187
Depart Tue, Dec 28 7:50pm ORD - Chicago OHare IL
Arrive Wed, Dec 29 11:30pm PEK - Beijing China
Total duration: 18hr 45min
American AA 186
Depart Mon, Jan 24 7:55am PEK - Beijing China
Arrive Mon, Jan 24 6:40am ORD - Chicago OHare IL
American AA 3778
Depart Mon, Jan 24 9:10am ORD - Chicago OHare IL
Arrive Mon... 阅读全帖 |
|
c*******l
发帖数: 41 | 34 当初AA宣布达拉斯到上海的直通航班后，达拉斯当地华人很是兴奋和幸福了一阵子。正
好准备夏天回国的，算算日子可不正赶上首航的日子(6/11)吗?拖家带口的能中间少转
一个机场少折腾几个小时那都是得斤斤计较的。赶紧上AA网站瞧了眼,6/11那天是$1711
,后面几天基本上都在$1700-$1750左右浮动。贵不贵？贵。可是就那个点儿好像基本上
也就这个行情了。又在iflychan.net上群发各代理要报价。怪了，还真没有一个代理推
荐这个直飞航班的，其他航班价在$1500-$1850之间。可是这些航班的总航飞时间可就
差老远了，最快的是19小时，最长的30小时。而直飞航班去程15小时回程14小时20分钟
，而且时间都比较好。而且还可以全家赞AA的点数。这么一想，基本上就它了。
再一想，当天AA同时开通去香港的直飞，我何不飞去香港在从上海飞回来？同时体验一
把两个航线的首航。最后我在flychina.com上直接搜票订了以下机票：
Dallas TX (DFW)
Depart Jun 11 12:45 pm to Hong Kong (HKG)
Arrive Jun 12... 阅读全帖 |
|
c*********y
发帖数: 115 | 35 One adult + One infant。机票信息如下，谁能帮买？PM我你的价格和电话。我和
Continental确认机票信息后BOA付款。
Depart Arrive Total duration: 21hr 15min
Oct 22 8:30 am Newark Oct 22 11:31 am Los Angeles
Continental 1223
Oct 22 12:54 pm Los Angeles Oct 23 5:45 pm Shanghai
Pudong Continental 877
Continental 877 is operated by United.
Depart Arrive Total duration: 14hr 35min
Jul 28 3:45 pm Shanghai Pudong Jul 28 6:20 pm Newark
Continental 86
... 阅读全帖 |
|
e****e
发帖数: 2010 | 36 Term在这里， 哪里说Gift Card 不Qualified？ 没看到呀
------------------------------------------------------
Holiday Campaign Terms & Conditions
Offer Terms & Conditions ("Terms").
Offline, PIN-based & International Transactions Ineligible.
This Offer begins 11/15/11, 12:00:01AM Central Time ("CT") & ends 12/31/11,
11:59:59PM CT, or while supplies last ("Offer Period"). Internet access is
required for participation & redemption. Eligibility: Open to MasterCard&#
174; cardholders who are legal residents of the ... 阅读全帖 |
|
d**********6
发帖数: 74 | 37 Thanks! Hope so.
Proposal Status
Status As of Today Dated: 08/16/09
A program recommendation for award was concurred with by the cognizant
Division/Directorate on 08/07/09. However, no award is ensured and the
recommended duration is 12 months with an effective date of 09/01/09 are
subject to change. The grantee institution assumes any pre-award costs at
its own risk. NSF may request additional information.
Award Duration: (months)
This recommendation was received in the Division of Grants and A |
|
c****s
发帖数: 167 | 38 你这种情况不需要通行证。
跟你的情况相同，我走过好多次了。
下面是我以前和香港移民局联系时他们的回复：
Thank you for your e-mail message.
Holders of People's Republic of China (PRC) passport who are in transit
through Hong Kong to and from another country or territory (e.g. USA »
HKSAR » Mainland China and/or Mainland China » HKSAR » USA)
may be granted a stay of seven days on each landing without the prior need
to obtain an entry permit provided that usual immigration requirements are
met, including possession of adequate f... 阅读全帖 |
|
c*********y
发帖数: 115 | 39 One adult + One infant。机票信息如下，谁能帮买？PM我你的价格和电话。我和
Continental确认机票信息后BOA付款。
Depart Arrive Total duration: 21hr 15min
Oct 22 8:30 am Newark Oct 22 11:31 am Los Angeles
Continental 1223
Oct 22 12:54 pm Los Angeles Oct 23 5:45 pm Shanghai
Pudong Continental 877
Continental 877 is operated by United.
Depart Arrive Total duration: 14hr 35min
Jul 28 3:45 pm Shanghai Pudong Jul 28 6:20 pm Newark
Continental 86
... 阅读全帖 |
|
h********a
发帖数: 5 | 40 Hi, an apartment in a nice high-rise building in Boston is for rent, here
are the specifics:
Price: $25/night, utilities included (you have your own room, share bathroom
with 2 other apartment
mates)
Duration available: 8/3-8/24 (you can rent part or all of the days in this
duration)
Location: 2 minute walk to Green line B-line T-stop (Allston St. or Warren
St.), Very close to Boston Univ.
Room condition: large room, non-smoking, new carpet
Drawback: No parking
If interested, please contact in m |
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s********n
发帖数: 1962 | 41 只要公司不破产 ....
That's the most important reason why you need a bond fund.
The spread between corporate bond and treasury is all about default risk
plus a little liquidity premium.
Another difference between a bond fund and a bond is that bond fund
usually maintains a relative constant duration while an individual bond
will have a reducing duration over life time thus exposes to a changing
interest rate risk. |
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s******d
发帖数: 323 | 42 就说muni bond吧，那种用general obligation的，用tax revenue还的。
如果州政府破产，fed不管，那么同样credit rating的bond, 是short duration的
受影响大还是longer term duration的大，还是一样？ |
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v***y
发帖数: 7583 | 43 我也想求大牛推荐，大包子答谢
DREYFUS CASH MGMT INST MONEY MARKET DVCXX
CALVERT INCOME FUND CLASS A CFICX
CALVERT SHORT DURATION INC CL A CSDAX
FIDELITY ADV HIGH INC ADVANTAGE CL T FAHYX
TEMPLETON GLOBAL BOND CLASS A TPINX
GOLDMAN SACHS SHORT DURATION GOVT CL A GSSDX
DREYFUS APPRECIATIONFUND DGAGX
DREYFUS STRATEGIC VALUE CL A DAGVX
AMERICAN CENTURY STRAT ALLOC CL A ACVAX
VANGUARD TOTAL STOCKMARKET INVESTOR V... 阅读全帖 |
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S**C
发帖数: 2964 | 44 You cannot buy past performance. The reason that LT treasury and TIPs
perform well in the past several years is we had a near depression crisis
and a looming EU crisis, thus longer duration and higher quality bonds
perform well.
Going forward, the tailwind may not be there. Although it is possible, or
even likely, that 10 year rate can drop further to below 1.5% from current 2
%, and stay low for a reasonably long period of time, in other words, it can
be good as a trade, but I am not a good tra... 阅读全帖 |
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l******i
发帖数: 1404 | 45 我也想请教一下，bond fund里的duration长有什么坏处？谢谢。
duration短的收益都很少。。。
我算了daily return series的sharpe ratio，VUSTX比较客观。 |
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r*******y
发帖数: 290 | 46 ARM still has rate risk, but the duration is generally shorter than 30y
e.g., 5y arm duration is generally 3 years, about 40% of 30yr |
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D******r
发帖数: 647 | 47 个人觉得不用太担心利率风险。LC最长的贷款期限也只有5年。如果把自己的账户看成
一个基金，算起来average duration可能只有3年多。很多被推荐用来hedge利率风险的
短期债的ETF,average duration也有这么长。
对小投资者来说，现在LC最大的问题是机构投资人涌入后，好的note太难抢到了。投入
的时间和回报严重不成比例。我现在是把找notes当成和买买提灌水一样的消遣。否则
还不如一年多开几个信用卡拿奖励划算。更不用说象前两周买点雅虎股票下周BABA上市
前买掉这种几乎没有风险的操作了。一年做上一次回报就远超过LC了。
说到风险，如果出现大的经济危机，失业率上升，LC的违约率肯定也会跟着上升。不过
那时候别的投资也都好不了。 |
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S**C
发帖数: 2964 | 48 The rule of thumb for constant duration bond funds is, if duration is N,
current yield is X, your annualized return in the next 2N-1 years is X. |
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m*********t
发帖数: 1250 | 50 把下面这个看看就清楚了~
在目前加息的预期下，比如VWESX，它的Avg Duration是14年，Sec Yield是3.45%，你自
己可以算算比如明年加息0.5% or 1%，total return会是多少~
http://whitecoatinvestor.com/yield-and-return/
===A Bond When Rates Increase
Now, let’s say you buy a treasury bond with a yield of 3% and a duration of
5 years and interest rates go up 1%. The value of your bond falls 5%.
Yield: 3% Capital Appreciation: -5% Total Return -2%
===A Bond When Rates Decrease
Now, let’s assume the opposite occurs with that 3% bond, rates go down 1%.
Now your b... 阅读全帖 |
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