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全部话题 - 话题: substitute
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h**********k
发帖数: 168
1
There are several categories or types of potential bias in using changes in
the CPI as a measure of the change in the cost of living. 1) Substitution
bias occurs because a fixed market basket fails to reflect the fact that
consumers substitute relatively less for more expensive goods when relative
prices change. 2) Outlet substitution bias occurs when shifts to lower price
outlets are not properly handled. 3) Quality change bias occurs when
improvements in the quality of products, such as greate
k**k
发帖数: 61
2
来自主题: Quant版 - Asset allocation 问题请教
To me MVO is just a framework, and one could choose different measures to
substitute "mean" and "variance" while keeping the same optimization
mechanism. If I understand you correctly, what you said falls under the
choice of substitute measure for "mean" (which of course entails different
substitute measure for "variance") -- curious if you could point to more
specific sources, say a classic paper or something particularly on the life
cycle consumption model

find
m****s
发帖数: 18160
3
来自主题: board版 - [合集] 申请中国新闻版版主
☆─────────────────────────────────────☆
monkeylady (MonkeyQueen) 于 (Fri Jan 14 18:07:02 2011, 美东) 提到:
是否已阅读:1)《站规》2)《版务操作简易手册》?:
已阅
[申请ID]:
monkeylady
[申请版面]:
ChinaNews
[申请职务]:
版主
[版务经验]:
没有,凡事总有第一次
[申请纲领]:
启民智、申民权, 期盼民主、平等、公平的新中国
[版规草案]:
自由、平等、博爱。
☆─────────────────────────────────────☆
oldguy (老人) 于 (Fri Jan 14 18:07:46 2011, 美东) 提到:
Support

☆─────────────────────────────────────☆
pedicure (ped) 于 (Fri Jan 14 18:08:20 2011, 美东) 提到:
支持!这位女生为人很好
☆─────────────────────────────────... 阅读全帖
j*****7
发帖数: 4348
4
来自主题: _pennystock版 - ZT 决定散伙的小BIOTECH
May 15, 2009 08:01 PM Eastern Daylight Time
Northfield Laboratories Announces Decision to Wind Down Business
EVANSTON, Ill.--(BUSINESS WIRE)--Northfield Laboratories Inc. (Nasdaq: NFLD)
announced today that it has determined to wind down its business operations
and carry out an orderly disposition of its assets.
Following its review and analysis of the complete response letter received
from the Food and Drug Administration on April 30, 2009, Northfield
determined that further clinical developm... 阅读全帖
O*******d
发帖数: 20343
5
你显然是生物外行,科盲。难怪那么幼稚。 要攻击进化论,先把进化论的理论搞清楚
了再发言。
1. Archidiacono, N., Storlazzi, C.T., Spalluto, C., Ricco, A.S., Marzella
, R., Rocchi, M. 1998. ‘Evolution of chromosome Y in primates.’ Chromosoma
107:241-246.
2. Britten, R.J. 2002. ‘Divergence between samples of chimpanzee and
human DNA sequences is 5% counting indels.’ Proceedings National Academy
Science 99:13633-13635.
3. Fujiyama, A., Watanabe, H., Toyoda, A., Taylor, T.D., Itoh, T., Tsai,
S.F., Park, H.S., Yaspo, M.L., Lehrach, H., C... 阅读全帖
c**i
发帖数: 6973
6
来自主题: ChinaNews版 - In Rice, More Comprehensive DNA Re-analysis
supports archaeology, that a single-origin domestication 8 to 9,000 years
years ago at Yangtze Valley (of China) and spread to India, rather than the
competing proposition that Ganges in India independently accomplished the
feat.
研究显示:中国是驯化水稻的原产地. VOA Chinese, May 3, 2011.
http://www.voanews.com/chinese/news
/international/20110503-RICE-ORIGIN-121155584.html
, which cites
Molina J et al, . Proceeding of National Academy Science (PNAS), published
online before print May 2, 2011, doi: 10.1073/pna... 阅读全帖
s********n
发帖数: 26222
7
【 以下文字转载自 Military 讨论区 】
发信人: smokinggun (硝烟), 信区: Military
标 题: 美国统计局编造通货膨胀数据
发信站: BBS 未名空间站 (Sat Jun 18 00:12:26 2011, 美东)
Williams points out that one of Greenspan's manipulations of the CPI
involved the consideration that when steak got too expensive, the consumer
would substitute hamburger for the steak. So, Greenspan argued, the
inflation measure should reflect the costs of buying hamburger, not steak.
NEWS ANALYSIS
What's America's real inflation rate?
If rate is so low, how come food an... 阅读全帖
B*******a
发帖数: 452
8
http://www.latimes.com/entertainment/news/la-et-china-red-dawn-
LA Times: Reel China: Hollywood tries to stay on China's good side
Without Beijing even uttering a critical word, MGM is changing the villains
in its 'Red Dawn' remake from Chinese to North Korean. It's all about
maintaining access to the Asian superpower's lucrative box office.
China has become such an important market for U.S. entertainment companies
that one studio has taken the extraordinary step of digitally altering a
film to ... 阅读全帖
s********n
发帖数: 26222
9
来自主题: Military版 - 美国统计局编造通货膨胀率数据
Williams points out that one of Greenspan's manipulations of the CPI
involved the consideration that when steak got too expensive, the consumer
would substitute hamburger for the steak. So, Greenspan argued, the
inflation measure should reflect the costs of buying hamburger, not steak.
NEWS ANALYSIS
What's America's real inflation rate?
If rate is so low, how come food and energy cost so much?
Posted: March 19, 2008
9:44 pm Eastern
By Jerome R. Corsi
© 2011 WND
Why is it that the federal go... 阅读全帖
i******r
发帖数: 1175
10
来自主题: Military版 - 美加适合华人定居的前10大城市.
2013 CANADA 的 政府报告:
》》》》》》》》》
Why is Canada’s income per capita lower than that of the United States?
Lower labour productivity accounts for the largest component of the income
gap between Canada and the United States. To get an idea of the role each
component of income per capita plays in the Canada–U.S. income gap, we used
the equation shown above, substituting U.S. data for one component at a
time, and keeping the country data for the other four components. For
example, to calculate what port... 阅读全帖
d*b
发帖数: 4453
11
来自主题: Military版 - 应该是媒体界对亚男的一种歧视
廊坊五毛懂个鸡巴毛美国! 难为你们不懂洋文,google不出来。 那我帮你一下好了。
美国这地方,不象你们廊坊,女的要给领导日,男的要把他妈给党委书记日才能上位。
在美国,只要你有本事,有能力,别说黑人当总统,就是亚裔小黄人照样凭当电视主
播。
Lia Chang: Fox 5 News NY (WNYW-TV) reporter Ti-Hua Chang Receives AAJA
National Journalism Award for story which explores Asian American Poverty in
New York
Lia Chang: Fox 5 News NY (WNYW-TV) reporter Ti-Hua Chang Receives AAJA
National Journalism Award for story which explores Asian American Poverty in
New York
Ti-Hua Chang
Kudos to Fox 5 News NY (WNYW-TV) reporter Ti-Hua C... 阅读全帖

发帖数: 1
12
来自主题: Military版 - “Intentionally
Exclusive: Mexico studies tariffs on billions of dollars of U.S. corn, soy
David Alire Garcia, Suman Naishadham
5 Min Read
MEXICO CITY (Reuters) - Mexico could strike at $4 billion in annual imports
of U.S. corn and soybeans if President Donald Trump escalates a trade spat
with new tariffs, officials told Reuters this week, and it is studying how
to reduce the pain of such a move.
An employee atop a vessel Western Tosca carrying corn imported from the
United States is pictured in the terminal po... 阅读全帖
B******e
发帖数: 16928
13
都是吃人血馒头。
Protests as Strategic Games: Experimental Evidence from Hong Kong's
Antiauthoritarian Movement
Abstract
Social scientists have long viewed the decision to protest as strategic,
with an individual's participation a function of their beliefs about others
’ turnout. We conduct a framed field experiment that recalibrates
individuals’ beliefs about others’ protest participation, in the context
of Hong Kong's ongoing antiauthoritarian movement. We elicit subjects’
planned participation in an ... 阅读全帖
B******e
发帖数: 16928
14
来自主题: Military版 - 收集4000多蝙蝠病毒
星光你看看和这个付钱让人去暴乱比如何?
https://academic.oup.com/qje/article/134/2/1021/5298503
Protests as Strategic Games: Experimental Evidence from Hong Kong's
Antiauthoritarian Movement
Abstract
Social scientists have long viewed the decision to protest as strategic,
with an individual's participation a function of their beliefs about others
’ turnout. We conduct a framed field experiment that recalibrates
individuals’ beliefs about others’ protest participation, in the context
of Hong Kong's ongoing antiautho... 阅读全帖
v**e
发帖数: 8422
15
因惧怕TB, MGM主动用数字化把新拍电影"红色梨明"里的坏人从中国改为北朝鲜
http://www.latimes.com/entertainment/news/la-et-china-red-dawn-
Reel China: Hollywood tries to stay on China's good side
Without Beijing even uttering a critical word, MGM is changing the villains
in its 'Red Dawn' remake from Chinese to North Korean. It's all about
maintaining access to the Asian superpower's lucrative box office.
China has become such an important market for U.S. entertainment companies
that one studio has taken the extraordinary step of... 阅读全帖
b****a
发帖数: 55
16
标 题: 回国探访代课老师 (OCEF教师资助项目) --- 请务删除,谢谢。
http://mitbbs.com/mitbbs_article_t.php?board=ChinaNews&gid=15246495&ftype=0&dingflag=1
发信人: SeraphUS (seraphUS), 信区: ChinaNews
发信站: BBS 未名空间站 (Thu Jan 11 23:06:57 2007)
***** This is a trip made by the US oversea student to China rural area in
order to investigate the Rural substitute teacher from China **********
http://www.ocef.org/
http://www.ocef.org/donation/
Rural Substitute Teacher Assistance Program, (贫困农村代课老师项目) 。
Roughly half-million such peopl
y****t
发帖数: 10233
17
来自主题: USANews版 - L.A school再暴淫兽
Substitute Teacher Arrested on Suspicion of Child Molestation
Ted Nishihara was arrested on suspicion of committing lewd acts upon a child
while substitute teaching at a La Mirada middle school, sheriff's deputies
said.
http://www.nbclosangeles.com/news/local/Subsitute-Teacher-Arres
l****z
发帖数: 29846
18
House kills Obama budget 2-413
Posted on Thursday, April 10th, 2014 at 12:09 AM.
By: Cristina Marcos
The House on Wednesday handily rejected a GOP budget alternative based on
President Obama’s 2015 spending blueprint.
It was defeated 2-413, following a pattern seen in recent years in House
votes to overwhelmingly reject Obama’s budget proposals. Today’s vote is
just slightly better than the unanimous vote against Obama’s budget in 2012.
The two “yes” votes came from Reps. Marcy Kaptur (D-Ohio) a... 阅读全帖
S******4
发帖数: 2865
19
来自主题: USANews版 - Drumpf Facebook post on H1b
DONALD J. TRUMP POSITION ON VISAS
"Megyn Kelly asked about highly-skilled immigration. The H-1B program is
neither high-skilled nor immigration: these are temporary foreign workers,
imported from abroad, for the explicit purpose of substituting for American
workers at lower pay. I remain totally committed to eliminating rampant,
widespread H-1B abuse and ending outrageous practices such as those that
occurred at Disney in Florida when Americans were forced to train their
foreign replacements. I ... 阅读全帖
t**x
发帖数: 20965
20
请你仔细看看,
良性的三个报告。其中一个是这个德国医生自己的,他承认自己从来没有看过。第一个
genedx,是我们出院(04/13)后一个月报的(05/13), 这个极有可能就是我们宝宝的结
果,被报呈良性。
https://www.ncbi.nlm.nih.gov/clinvar/variation/92429/
这个变异发现10多年,欧洲基因库收录为恶性。只有美国报称良性,在我们宝宝刚刚出
院。你真得仔细看看时间和事情了。
你没有看到跨国界作假反而。。。你看看荷兰医生的回信。我真怀疑你到底是干什么的

这个变异发现了10多年了, 这个德国医生的链接的文献没有说是良性的, 你自己看看
下面德国医生附上的文献。我不是医生,我看不出来说这个变异是良性的。你如果愿意
看看我家宝宝cpt2的两个结果, 一个1.5%酶活性,一个15%酶活性,跟下面的温度相关
吻合得多好。
我家宝宝的下降更多,大概是因为他的变异更多。这个特征的变异很多年了,但是
cchmc和Baylor都没有查出来。你说说他们不知道?!
Here the excerpt von OMIM regarding this mut... 阅读全帖
t**x
发帖数: 20965
21
yangyi和aning我没有跟她/他斗, 我劝你们好好看看德国医生给的参考资料, 这个资
料你怎么得出是benign的结论的:
0018 ENCEPHALOPATHY, ACUTE, INFECTION-INDUCED, SUSCEPTIBILITY TO, 4
CPT2, PHE352CYS AND VAL368ILE [dbSNP:rs2229291] [dbSNP:rs1799821] [ClinVar]
Chen et al. (2005) found an association between 2 thermolabile polymorphisms
in the CPT1 gene and susceptibility to infection-induced acute
encephalopathy-4 (IIAE4; 614212) in Japanese children. The variants were a
1055T-G transversion, resulting in a phe352-to-cys (F352C) substitution (
rs... 阅读全帖
t**x
发帖数: 20965
22
我可以跟你说这个写这个文章的医生是一个十恶不赦的王八蛋!因为这个德国医生就是
跟西雅图儿童医院勾结的个婊子养的畜生。
这是我的信:
Von: Andrew Xie [mailto:[email protected]/* */]
Gesendet: Montag, 19. September 2016 13:24
An: Wieser, Dr. Thomas, Chefarzt
Betreff: RE: Question on a benign mutation / NM_000098.2(CPT2):c.1102G>A (p.
Val368Ile) Simple - Variation Report - ClinVar – NCBI
Dear Dr. Wieser,
Thanks for your reply.
In the link it says 3 sources reporting ‘benign’ :
1. GeneDX on May 29, 2013
2. Emory Genetics Laboratory on Apr 16, 2014... 阅读全帖

发帖数: 1
23
来自主题: USANews版 - 原来这个Vblivingod是个新ID啊
国会预算办公室对替代法案的初步评估结果是什么,你知道吗?
H.R. 1628, Obamacare Repeal Reconciliation Act of 2017
July 19, 2017
Cost Estimate
CBO and JCT estimate that enacting this legislation would reduce federal
deficits by $473 billion over the coming decade and increase the number of
people who are uninsured by 32 million in 2026 relative to current law.
View Document
179.95 KB
Summary
An Amendment in the Nature of a Substitute [LYN17479] as Posted on the
Website of the Senate Committee on the Budget on July 19, 2017
CB... 阅读全帖
s********n
发帖数: 26222
24
【 以下文字转载自 Military 讨论区 】
发信人: smokinggun (硝烟), 信区: Military
标 题: 美国统计局编造通货膨胀数据
发信站: BBS 未名空间站 (Sat Jun 18 00:12:26 2011, 美东)
Williams points out that one of Greenspan's manipulations of the CPI
involved the consideration that when steak got too expensive, the consumer
would substitute hamburger for the steak. So, Greenspan argued, the
inflation measure should reflect the costs of buying hamburger, not steak.
NEWS ANALYSIS
What's America's real inflation rate?
If rate is so low, how come food an... 阅读全帖
o**********n
发帖数: 367
25
【 以下文字转载自 SanFrancisco 讨论区 】
发信人: optionoption (option), 信区: SanFrancisco
标 题: Judge late for traffic court for 45 minutes
发信站: BBS 未名空间站 (Tue May 18 23:25:00 2010, 美东)
Today in Redwood city, court should start at 8:30am, no judge came until 9:
15am.
The person finally showed up (looked like a substitution)came in without any word of apology.
I twice requested dismissing my case based on the court's fault (judge being 45 minutes late), but did not get it from the substitution(?) judge.
He late
Z*********i
发帖数: 3422
26
来自主题: Automobile版 - 2011 Honda Pilot EXL 2WD
Houston.
Update:
买车一周后,偶然在GLOVE BOX里发现一张Bailment/Substitute User Agreement.证明
这个车在我买的一周前曾被借给另一个CUSTOMER 24 小时.由于买的时候ODOMETER是26
MILES, 所以估计他也就开了10 MILE左右,但仍不爽,找DEALER 理论,他们给了$150
CREDIT,不知道这个 Bailment/Substitute User Agreement有没有问题?
X***9
发帖数: 7385
27
来自主题: Automobile版 - 2016 HONDA PILOT 参数
Sleek and athletic exterior meets interior elegance for a commanding yet
sophisticated presence
Top-of-the-line Elite trim introduces a premium look, feel and
experience with highest level of standard features
Direct injected 3.5-liter i-VTEC® engine with more horsepower and
torque than outgoing model
Smartest Pilot ever with new Intelligent Traction Management system,
Honda Sensing™ technologies and i-VTM4 AWD system
The all-new, third generation 2016 Honda Pilot will... 阅读全帖
e****e
发帖数: 2010
28
来自主题: ebiz版 - MasterCard 20 刀
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
i**y
发帖数: 829
29
来自主题: Family版 - 老公爱打游戏,怎么办
多说几句
我是单身男。
我前段时间打游戏主要是:无聊,打发时间,喜欢赢的感觉,赢的时候的刺激
我觉得:这是自控能力的问题。我以前玩偷菜也是,天天玩,很上瘾!后来也是cold
turkey quit
it,说quit 就quit 了。未名游戏,也一样!
建议:给你们的老公另找个爱好,当你戒掉一种瘾,不复发的方式是最好take another
addiction
as a substitute(这就是为什么很多戒毒的人 改不了抽烟,因为他们需要抽烟作为
substitute;这可是戒毒的人亲自告诉我的!)。爱好:例如:看电视,上gym;btw,
其实有的电
视节目很好看的。
b*******t
发帖数: 33714
30

其实东西都没买齐,柴鱼片和海苔粉都木有,但是忍不住想试一下,于是网上随便
google了个方子,味道完全不对阿。。。
求安慰!!大家向我瞄准砸包纸吧!!
------------------------
Batter:
4/5 cup (100g) prepackaged takoyaki mix. If unavailable, substitute a scant
4/5 cup (90g) flour, 1 tsp (5g) instant hondashi granules (bonito stock), 3/
4 tsp (3g) grated “nagaimo” mountain yam (optional, but fabulous for
tender texture), and 1/4 tsp (1g) baking powder
340cc cold water (a scant 1 & 1/2 cups)
1 large egg
For the filling:
1/4 lb (120g) cooked octopus (Japanese prefer the... 阅读全帖
b*******t
发帖数: 33714
31
Batter:
4/5 cup (100g) prepackaged takoyaki mix. If unavailable, substitute a scant
4/5 cup (90g) flour, 1 tsp (5g) instant hondashi granules (bonito stock), 3/
4 tsp (3g) grated “nagaimo” mountain yam (optional, but fabulous for
tender texture), and 1/4 tsp (1g) baking powder
340cc cold water (a scant 1 & 1/2 cups)
1 large egg
For the filling:
1/4 lb (120g) cooked octopus (Japanese prefer the tentacles), cut into 1/2″
or bite-sized dice (NOTE: If you like, you can substitute other things for
th... 阅读全帖
j******l
发帖数: 459
32
来自主题: Food版 - 为毛马卡龙难吃又死贵?
In some situations, vinegar can be substituted for cream of tartar, although
there is no exact substitute for the powder.
人家来自于tartaric acid
t*****e
发帖数: 15794
33
来自主题: Food版 - 转化糖浆和golden syrup的对比
golden syrup和转化糖浆,
实在就是中英文叫法不同。
贴个做法给大家看看。
http://www.food.com/recipe/homemade-golden-syrup-substitute-475
TOTAL TIME
50mins
PREP 10 MINS
COOK 40 MINS
From nneckredrecipes.blogspot.com : If you are somewhere in this world where
golden syrup is not readily available, this homemade version is a good
substitute. Of course in terms of fragrance, you can't beat the commercial
ones.
Skip to Next Recipe
INGREDIENTS Nutrition
SERVINGS
10
YIELD
1 batch
UNITS
US
200 g sugar
50 g water
1 kg sugar
600 g boi... 阅读全帖
s**********r
发帖数: 141
34
来自主题: JobHunting版 - Discuss: A google binary search problem
Key observation:
if there's a sequence S (S[0] < S[1] < ... < S[k-1]) which has size k and
it's min-dist is w in sorted array A, then we can derive another sequence
Z (Z[0] < Z[1] < ... < Z[k-1]) with size k, and Z has min-dist w1 >= w.
Hint: Since S[0] >= A[0], if you substitute S[0] with A[0], and the
sequence S now has min-dist >= w; you can move one more step to
substitutes S[1] with A[j] s.t. A[j] >= A[0]+w and A[j-1] < A[0]+w, and
the sequence now still has min-dist >=w. Pushing this idea
S*******0
发帖数: 198
35
来自主题: JobHunting版 - 贡献邮件面试题(Web Development)
1. Deadlock describes a situation that two or more threads (processes) are
blocked forever, waiting for each other.
Causes: one thread needs to visit the resource that another thread is
possessing and vice versa.
Effects: If deadlock happens, the threads involved will hang there forever
in an undesired status. Deadlock should be avoided.
2.
public ArrayList getToyotas(ArrayList cars)
{
if(cars == null) return null;

ArrayList toyotas = new ArrayList();
for ... 阅读全帖
a*******n
发帖数: 28
36
来自主题: JobHunting版 - Part-time Mandarin teacher in Lebanon, NJ
http://www.acornschool.org/About-Us/Employment-Volunteer-Opport
Employment Opportunities
We are now in the process of forming our after-school workshops. The
workshops run between the hours of 3-5 PM, from September through December.
A second series runs from January through May.
Mandarin language teacher:
If you are interested in establishing an after-school Mandarin Language
workshop for children preK-3rd grade, please send a letter of interest and
resume to p****[email protected].
Visual Ar... 阅读全帖
i*******g
发帖数: 37
37
这个职位是一年(2014-15)的full time substitute faculty, 然后可以申请明年的
full time tenure-track position。这一年教Computer Science课程,也可能会教点
数学课,主要是本科课程。如果申请者研究能力很强,发表过若干高质量论文,在明年
申请到tenure-track position之后,可以申请研究生院的博导,教博士生课程和带博
士生。
要求:已经取得CS博士学位或即将取得CS博士学位。有很强的教学能力和科研能力。
申请:将CV和Cover letter发到如下email(同时cc: [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.lengt... 阅读全帖
w********r
发帖数: 1842
38
来自主题: NextGeneration版 - Family Care
我去看的2家India家里都有其他人。但是另外2家没有,但是说有Registered
Substitute。有一家说如果小孩多一点的话就把那个Substitute发展成员工。

license
G*******X
发帖数: 1028
39
来自主题: NextGeneration版 - 书摘: 保姆或幼儿园
花了一晚上,翻译出来的。 仅供参考。每个家庭都不一样。无论什么时候,都不要太
教条。
对保姆或幼儿园的看法(substitute Child Care)
书摘-the new first three years of life ; by Burton L White
早在1979年,我在接受Los Angeles Times的采访时就已经无意中卷入了对substitute
day care的争论。我那时候是这么说的,现在仍然这样认为:三岁以下的宝宝入全托,
尤其是才几个月的宝宝就入全托,在我看来对宝宝不利的。
我知道有很多人有不同意见。下面我就详细介绍一下我的观点。
在我们的传统文化里,妇女主要是照顾宝宝的主力,尤其是宝宝不到一岁的时候。但这
种传统受到了挑战。 现在,越来越多的婴幼儿在清醒的大部分时间,不是由父母或直
接的很近的亲属照顾的。
作为一个婴幼儿教育的专家,我从过去到现在,一直对此非常困扰。当然,我担忧的主
要是宝宝,但我也担忧那些选择在家带孩子的妇女因为这种选择而承受很多压力。我还
替另外的那些父母难过,因为他们错过了人生中最甜蜜幸福的一段时光,这种甜蜜和幸
福只有花时间... 阅读全帖
t******l
发帖数: 10908
40
如果按标准代数 piece-wise linear 进行 substitution,那么 |2y+6| 这个
expression 被 substitute 成如下的 piece-wise function:
(2y+6), y ≧ -3
-(2y+6), y < -3
把上面 piece-wise expression/function 搞进原方程成为 piece-wise equation,这
样就不会出错。
还可以用解析几何坐标系画一下,当然考试时省时间就不必了。
t******l
发帖数: 10908
41
这个写得简洁明了。实质就是绝对值的分段函数 substitution 这个 formal
operation 的具体实践,只是这里的 formal operation 把一个方程拆成两个“区段内
有效”的方程。
其实我给娃写就直接写出 piece-wise linear 和 algebraic substitution 的写法,
反正自家不受学校书写格式的限制。
另外第一个 obvious x>0 不是必须。更明了的写法是写在 case 1 和 2 的第二步绝对
值展开里,虽然比较 trivial。
t******l
发帖数: 10908
42
如果目的仅仅是求根而不是画整个函数,那不一定要解不等式,理论上就是把
|f(x)| 这个表达式给 algebraic substitute 成两个带条件的表达式:
+f(x), when f(x) >= 0
-f(x), when f(x) <= 0
然后把条件表达式放进去形成带条件的方程。先不管条件解出来以后,代入条件
看看是不是满足条件即可,不用解 x range 的不等式了。algebraic substitution
死推也推倒了,当然就是体力活多一些。
t******l
发帖数: 10908
43
来自主题: Parenting版 - 该不该离开酱油游泳队
另外第三题那个网上标准答案写得很差,应该直接 substitute 掉整个根号,否则不是
自然的思路。
第一题的网上标准答案也有问题,正常思路是直接分数运算凑起来,没人会一开始搞个
大 LCM 思路太跳跃了也不适于分步准心算。。。

:没刷过这题,最近刷过的是讲 ACOPS 里 algebraic substitution 那段刷过的是那年
:的第三题。。。最近刷过的题我和我娃至少记得刷过,不会发生短期重复刷的事儿。
。。
f******t
发帖数: 2699
44
来自主题: PennySaver版 - 绿墙的ice cream RR丢
dairy product是指用牛奶做的东东,但一般说来dairy department不包括冰淇凌,而
是包括以下东西。
Butter & Margarine
Cheese
Cream
Coffee Creamers
Sour Cream
Whipped Cream
Dips
Eggs
Eggs Substitutes
Gelatin & Pudding
Milk
Buttermilk
Milk Substitutes
Refrigerated Doughs
Assorted Bread & Pizza Doughs
Breakfast Pastries
Cookies, Brownies & Pies
Refrigerated Potatoes
Yogurt
下次教育教育不懂事的小二~
如果非说ice cream是dairy,那你就拿鸡蛋~~
h******d
发帖数: 267
45
下面是他们的email,有个option 2说可以reissue coupon,但是我联系staples又说不
可以
My Passport 1TB Portable USB 30 External Hard Drive Black you ordered is
currently out of stock, and you have not been billed for it.. We have
however found a possible substitute, item # 957879, which is available for $
79.99. If you wish to go with this substitute item, please call us at 800-
333-3330, option 2, or you can also place your order online. Where this was
the only item on your order we have canceled this order for you.
If ... 阅读全帖
s*******1
发帖数: 11216
46
Offer Details:  *With a single purchase of $50 or more (excluding sales
tax) in a single transaction, calculated after deduction of Safeway Club
Card Savings and all other discounts and savings. Excludes purchases of:
Beer, Wine, Spirits, Tobacco Products, Fuel, All Fluid Items in the
Refrigerated Dairy Selection (including Fluid Dairy and Dairy Substitutes).
Prescription items and Co-payments, Bus/Commuter Passes, Fishing/Hunting
Licenses and Tags, Postage Stamps, Money Orders, Money Trans... 阅读全帖
s********n
发帖数: 26222
47
【 以下文字转载自 Military 讨论区 】
发信人: smokinggun (硝烟), 信区: Military
标 题: 美国统计局编造通货膨胀数据
发信站: BBS 未名空间站 (Sat Jun 18 00:12:26 2011, 美东)
Williams points out that one of Greenspan's manipulations of the CPI
involved the consideration that when steak got too expensive, the consumer
would substitute hamburger for the steak. So, Greenspan argued, the
inflation measure should reflect the costs of buying hamburger, not steak.
NEWS ANALYSIS
What's America's real inflation rate?
If rate is so low, how come food an... 阅读全帖
M*****8
发帖数: 17722
48
【 以下文字转载自 Military 讨论区 】
发信人: smokinggun (硝烟), 信区: Military
标 题: 美国统计局编造通货膨胀数据
发信站: BBS 未名空间站 (Sat Jun 18 00:12:26 2011, 美东)
Williams points out that one of Greenspan's manipulations of the CPI
involved the consideration that when steak got too expensive, the consumer
would substitute hamburger for the steak. So, Greenspan argued, the
inflation measure should reflect the costs of buying hamburger, not steak.
NEWS ANALYSIS
What's America's real inflation rate?
If rate is so low, how come food an... 阅读全帖
i*u
发帖数: 299
49
来自主题: Stock版 - stocks or bonds? what to buy?
These two assets are substitutable in portfolio allocation. Investors
reallocate their bond/stock holding in different economic environment. This
oscillator is about the idea of relative strength and substitution effect
between assets. I am not very sure what you mean by comparable but let me
know if you have any question.
h***e
发帖数: 20195
50
【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 雅虎上米国、三哥和小日本的评论
发信站: BBS 未名空间站 (Sun Jun 17 13:31:15 2012, 美东)
米国网民的评论。这是美国雅虎上面的:
?
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Arctic fox ? 16 mins ago
Now are they, like Americans and Russians, going to wonder around the
Earth at 300-400 km above the surface and call it "space" too? Or are they
going to higher than 600 km where the electrons and positrons ... 阅读全帖
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