E***r 发帖数: 1037 | 1 FINRA Rule 4210(f)(8)(B) 的定义貌似非常含混不清
http://www.finra.org/industry/interpretations-margin-rule
“day trading” means the purchasing and selling or the selling and
purchasing of the same security on the same day in a margin account ...
4210(f)(8)(B)(ii)/01 试图进一步澄清,但还是没解释清楚
Multiple Purchases and Sales
If a customer enters an order to purchase a security and sells the
same security within the same day, but for reasons beyond the
customer’s control e.g., price, the purchase was executed in smaller
bl... 阅读全帖 |
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e**n 发帖数: 5876 | 2 如果你戴眼镜的话, 自带的罩了确实小了点, 在大太阳底下会漏光. 我用G系列和GH系
列的EVF都没有这个问题. 原厂也有更大的罩子买, 但是罩子大了影响外观. 作为外貌
党, 我就忍了.
GX7的EVF还有一个问题就是rainbow tearing. 原因是这个EVF用的是sequential
display, RGB是sequential显示的, 好处是色彩准确, 100% cover adobe RGB space.
缺点就是快速移动的时候, 因为是sequential显示, 物体边缘会有一点rainbow
flicker. 刚拿到机器的时候发现了, 后来用久了, 倒再没注意过. |
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h*******o 发帖数: 4884 | 3 原来是原装的希捷的硬盘250G
换了OWC SSD Mercury Extreme Pro 的240G,总体印象是没有想像中的那么快,可能是
因为我不是clean install,用得superduper直接的硬拷贝,所以SSD上的系统不是很干
净 ,但是也提升了不少,尤其是launch illustrator/photoshop之类的时候
原来的开机,菊花转25圈半,现在是2圈半,从休眠里起来提升不明显。另外,目前为
止还没有遇到休眠以后唤醒不了的问题
换了SSD以后的374 分数和我late 2009 i7的imac一样了
374+OWC SSD
Results 210.70
System Info
Xbench Version 1.3
System Version 10.6.5 (10H574)
Physical RAM 8192 MB
Model MacBookPro7,1
Drive Type ... 阅读全帖 |
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w********2 发帖数: 16371 | 4 As Apple‘s (AAPL) shares sag $9.30, or 1.6%, to $562.40 following results
from AT&T (T) this morning that saw fewer iPhone activations last quarter
than some expected, and with only hours to go till Cupertino’s fiscal Q2
report tonight, the Street is out in force debating the implications.
AT&T activated 43% fewer iPhones in the quarter than the quarter before.
As I noted earlier, Jefferies & Co.’s Peter Misek, who has a Buy rating on
the shares, said the AT&T report could mean fewer iPhones sol... 阅读全帖 |
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g*******g 发帖数: 108 | 5 discussion at c*****[email protected]
I get my thoughts on RAC based on my experience, I do not remember where I
get the anology "amplifier". I doubt it is from Tom Kyte, he rarely
criticizes an Oralce product, maybe he did/will, i can be hold responsible
for his words :)
Let's focus on the tech side now.
I characterize primary feather of OLTP is "use interaction", queries run
fast and expect few records. Repeatedly used data are cached in the data
buffer.(typically)
In a sequential read w... 阅读全帖 |
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t****t 发帖数: 6806 | 6 速度测试, 用bonnie++测的
CF card
------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
2G 4472 3 7493 5 32269 8 1981 16
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 7262 |
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p**i 发帖数: 688 | 7 如果你有Windows vista/7, 可以用built-in的winsat, 假设SSD的drive letter是c
winsat disk -drive c
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-drive c -seq -read'
> Run Time 00:00:04.45
> Running: Storage Assessment '-drive c -ran -read'
> Run Time 00:00:00.94
> Running: Storage Assessment '-drive c -scen 2009'
> Run Time 00:00:55.24
> Running: Storage Assessment '-drive c -seq -write'
> Run Time 00:00:06.82
> Running: Storage Assessmen... 阅读全帖 |
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s*******d 发帖数: 4135 | 8 我的结果:
Windows System Assessment Tool
> Running: Feature Enumeration ''
> Run Time 00:00:00.00
> Running: Storage Assessment '-drive c -seq -read'
> Run Time 00:00:05.96
> Running: Storage Assessment '-drive c -ran -read'
> Run Time 00:00:00.53
> Running: Storage Assessment '-drive c -scen 2009'
> Run Time 00:00:53.67
> Running: Storage Assessment '-drive c -seq -write'
> Run Time 00:00:06.38
> Running: Storage Assessment '-drive c -flush -seq'
> Run Time 00:00:01.48
> Running: Storage Assessment... 阅读全帖 |
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e**e 发帖数: 3 | 9 Did the Fortran program use "direct access" or "sequential access" to
write the binary file?
If "sequential access", each write statement will produce one record
in the data file, and the record is prefixed and postfixed with the
integer value that is the length of that record. For example
open(unit=..., file="...", access="sequential", form="unformatted")
write(unit=...)1.23d0
will write the four-byte integer "8", the eight-byte double "1.23d0",
and again the four-byte integer "8". The "8 |
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p***o 发帖数: 1252 | 10 OK,我想我知道你那里不明白了。关于内存一致性,有两个层面。一是
cache coherence,这个保证任何一个内存位置在同一个系统中看起来
是一样的。这一条符合大多数人的直观想法,也确实是严格满足的。
第二个是memory consistency, 这个和不同内存位置的读写顺序有关。
大多数人的直观想法是这些读写存在一个全局的顺序,或者叫sequential
consistency。如果单机只有一个核,这没有问题,因为不管你有多少个
线程,每条指令是atomic的并且指令只能交错运行。问题是现在的单机
有多个核,你要实现sequential consistency的话对于系统速度影响
太大,这是不可接受的。所以你能买到的多核/多CPU系统全部--不满足--
sequential consistency, 也就是你直观上的想法。
至于它们满足什么memory consistency model,你只能去查手册,比如
Intel? 64 and IA-32 Architectures Software Developer’s Manual
Volume 3A: System Progr |
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i**i 发帖数: 1500 | 11 http://readwrite.com/2014/08/14/google-android-open-soure
把苹果的命给革了以后,却发现革命群众不是那么好带的.
Never has a tweet been more true, or potentially more disastrous for a
vendor. Years ago Google's Andy Rubin, stung by Steve Jobs' criticism that
Android wasn't truly open, tweeted that anyone could fork - i.e., modify -
Android, making it "open" in the truest sense of the word.
Unfortunately for Google, many OEMs took Rubin at his word.
Today, Google's Android business is booming, but it's clear that Android
fr... 阅读全帖 |
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a*****e 发帖数: 1700 | 12 我不是很理解你说的用 monad 描述 parsing 和 monad 表述 I/O 有什么关系,
是说 parser combinator 可以用 monad 实现吗?parser combinator 同样可以用
applicative 或者 arrows 实现,和 monad 的实现各有优劣。
我说 I/O compose like monads 前面还要加一个定语: sequential,这是因为需要
确保副作用发生的先后顺序。不加限制的 function composition 做不到这点,但
不加限制的 monad composition 可以做到这点。
而且 text composition 明显是个 monoid,先后顺序不重要,结果一致就好。
为什么说 sequential I/O 可以用 Monad 表述,是因为 sequential I/O 之间的
composition 满足 monad laws,而不是源程序可以写成什么样子,同时它也
不依赖于语言本身的求值顺序等特征。 |
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d****n 发帖数: 1637 | 13 latency numbers every programmer should know.
FYI:
你那个数据库io最好的情况是disk io 再加上300ms delay.
几百个数据比较不出来啥,一百万个就会很大不同了。
Latency Comparison Numbers
--------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x
L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x
L2 cache, 200... 阅读全帖 |
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n****t 发帖数: 182 | 14 For group sequential designs, n.GS/n.fix>1 to remain the same power, where n
.GS is the group sequential designs(with correctly controlled type I error).
For certain designs there are even formula for this.
Google "group sequential designs" should yield a lot of results on this. |
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T*********s 发帖数: 17839 | 15 The company's guidance at the last earnings date was for seasonal demand
increases and sees revenue improving sequentially. Shipments were flat
sequentially, but -5% from a year ago; revenue was a 1% gain sequentially
but -15% from last year. Gross margin was 17.3% and cash flow from
operations was $801 million (under closer to $1 billion we were expecting). |
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s**********t 发帖数: 1846 | 16 http://online.wsj.com/article/SB1000142405297020455590457716761
SHANGHAI—Property prices in 70 Chinese cities in a government survey fell
in December from the previous month, marking the third straight decline
after developers cut prices to boost sales amid Beijing's campaign to cool
the property market.
Prices still rose compared with a year earlier, though at a slower rate than
in November.
Property developers are becoming more cautious and expect further price
falls this year as the governmen... 阅读全帖 |
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u***r 发帖数: 4825 | 17 http://online.wsj.com/article/SB1000142405297020455590457716761
SHANGHAI—Property prices in 70 Chinese cities in a government survey fell
in December from the previous month, marking the third straight decline
after developers cut prices to boost sales amid Beijing's campaign to cool
the property market.
Prices still rose compared with a year earlier, though at a slower rate than
in November.
Property developers are becoming more cautious and expect further price
falls this year as the governmen... 阅读全帖 |
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o*****k 发帖数: 169 | 18 Which number president ... = ungrammatical
第几任 = which rank in sequential order
rank 才是 第几/排序
you can rank by anything, e.g. performance, age, what ever.
rank in sequential order = 按照先后次序的排名
Obama's numerical rank in Presidential lineage/sequence = x (whatever). |
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I***i 发帖数: 14557 | 20 奥,看了视频的介绍,真是dogbox,似乎和通常的手动车不一样。我不了解这个东东,
和sequential有区别吗,以前看过sequential的视频,似乎也是这么个升档方法 |
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C*********g 发帖数: 918 | 21 二手交易风险自负!请自行验证是否合法和一手卡!:
y
我想卖的物品:
intel 330 SSD 120GB in retail box, intel 5 years warranty
(注:盒子内有2.5->3.5转换架子和串口SATA线)
Height: 9.5mm
Max Sequential Read: Up to 500 MB/s
Max Sequential Write: Up to 450 MB/s
可接受价格(必须明码标价!):
135
物品新旧要求:
brand new, never opened
邮寄方式要求:
YL
买卖双方谁承担邮寄损失(Required if not code only):
before...me; after...you
付款方式说明:
chase bill pay, or non-cc paypal
广告的有效期:
till gone
物品来源(Required for All Cards!):
150网购于亚马逊
新蛋参考价
http://www.newegg.com/Product/Product.aspx?Item... 阅读全帖 |
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d***a 发帖数: 13752 | 22 我看了一下,CUNY的文章比较了2014年的另一篇文章。会不会是编辑犯懒,没有仔细检
查,把这篇文章和北大的文章弄混了。
似乎这个大的想法,是2014年那篇文章提出来的?
俺不是搞自然语言处理的,也不多说了。
"Our model is simi-
lar to Kim (2014), but while his sequential CNNs
put a word in its sequential context, ours considers
a word and its parent, grand-parent, great-grand-
parent, and siblings on the dependency tree."
Yoon Kim. 2014. Convolutional neural networks for sentence classification.
In Proceedings of the
2014 Conference on Empirical Methods in Natu-
ral Language Processing (EMN... 阅读全帖 |
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发帖数: 1 | 23 Academic Position
Harvard University Rowland; Junior Fellow/Principal Investigator 09/2011 –
Present
University of California, Los Angeles; Postdoctoral Scholar (PI: Dino Di
Carlo Ph.D.) 06/2011 – 08/2011
Education and Training
University of California, Los Angeles Mechanical Engineering Ph.D. 2011
University of California, Los Angeles Mechanical Engineering M.S. 2007
University of California, Los Angeles Mechanical and Aerospace Engineering B
.S. 2005
Publication
13. Dwayne A. L. Vickers, Mengx... 阅读全帖 |
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C*********g 发帖数: 918 | 24 二手交易风险自负!请自行验证是否合法和一手卡!:
y
我想卖的物品:
intel 330 SSD 120GB in retail box, intel 5 years warranty
(注:盒子内有2.5->3.5转换架子和串口SATA线)
Height: 9.5mm
Max Sequential Read: Up to 500 MB/s
Max Sequential Write: Up to 450 MB/s
可接受价格(必须明码标价!):
135
物品新旧要求:
brand new, never opened
邮寄方式要求:
YL
买卖双方谁承担邮寄损失(Required if not code only):
before...me; after...you
付款方式说明:
chase bill pay, or non-cc paypal
广告的有效期:
till gone
物品来源(Required for All Cards!):
150网购于亚马逊
新蛋参考价
http://www.newegg.com/Product/Product.aspx?Item... 阅读全帖 |
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j*******o 发帖数: 246 | 25 各位能稍微讲解一下,或给个相关参考文献链接之类的么?题目如下
There is a log file containing 1 million integers. Each integer is 32 bits
in length. Specific integer values in the log file may be repeated. It is
possible to read the log file sequentially. It is possible to read and write
temp files sequentially; however, no more than 2000 integers may be read
into memory at any given time. There is no limit to the number of files that
may be open at any time.
Objective: Produce a histogram showing absolute counts for each int |
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y*********e 发帖数: 518 | 26 第三题其实是考察面试者对存储设备的实现是否了解。
这里的 memory stick 应该是优盘,速度比较慢的那种。
一般的存储设备,若是数据是 sequential stored,那么读取速度就会很快。不然,就
需要 random seek,速度就很慢了。
可以想象一个存储设备的实现是 Linked List,若是 sequential stored,那么最多读
取 O(n) 次,这里 n 就是文件的大小。若是有很多碎片,那么最坏的情况就是 O(N),
这里 N 是整个设备的大小!
当然,存储设备也提供随机读取,虽然比顺序读取慢很多(相差1~2个数量级),但
是也比顺序扫描完整个设备要快很多。
用 n 来表示文件的大小,s 来表示顺序读取速度,用 k 来表示随机读取速度。一般
的,s 的值介于 10k~100k 之间。
若是文件没有碎片,那么读取的消耗是 C1 = 1 / k + n / s
若是文件有 x 个碎片,那么读取的消耗就是 C2 = (1 + x) * (1 / k) + (n / x) / s。
设 s = 10k,x = n / 2。那么,
C1 = 1 / k + n |
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d********w 发帖数: 363 | 27 品味来了。
Basics and Algorithms
The Five-Minute Rule Ten Years Later, and Other Computer Storage Rules of
Thumb (1997): This paper (and the original one proposed 10 years earlier)
illustrates a quantitative formula to calculate whether a data page should
be cached in memory or not. It is a delight to read Jim Gray approach to an
array of related problems, e.g. how big should a page size be.
AlphaSort: A Cache-Sensitive Parallel External Sort (1995): Sorting is one
of the most essential algorithms in... 阅读全帖 |
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x*****0 发帖数: 452 | 28 下面这道题是在版上看到的一道题。请问大家有什么想法吗?
设计一个Map,满足下面的时间复杂度。
add: O(1) deletion: O(1) lookup: O(1) clear:O(1) iterate: O(number of
elements)。
提示:
如果我们用randomly accessed array,复杂度如下:
add: O(1) deletion: O(1) lookup: O(1) clear: O(size of array) iterate:
O(size of array)
如果我么用sequential array, 复杂度如下:
add: O(1) deletion: O(number of elements) lookup:O(number of elements)
clear: O(1) iterate:O(number of elements)
所以我们需要把这两个方法整合起来。
对于这题的提示,sequential array指的就是link list? 把每一对阅读全帖 |
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i*****e 发帖数: 20 | 29 你的问题不清楚。
你弄清:系统是用在什么地方,是否是地理上离很远,还是在同一个数据中心,是否两
个服务器是active active or active passive back up. Or whether there is a
primary replica and secondary replica, and replica management policy.
From request perspective, whether it's read intensive and/or write intensive
.
Once understood the above, then you can select consistency model/semantic.
1. Complete consistency. It means whenever a data item is updated, both
servers will be able to read this copy of data. In academic research, this
can be assume... 阅读全帖 |
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u*******9 发帖数: 2 | 31 最近ob让我去做一些检查,包括sequential screens,请问这个检查是否就是唐筛,还
是唐筛的其中一项。另外,唐筛是ob检查过程中必查,还是自己提出做检查的项目(例
如像羊水穿刺)。
最后弱问一下:唐晒得英文名称是什么,就是sequential screens?
非常感谢! |
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l***o 发帖数: 578 | 33 Integrated test: 1st trimester, NT, and 2nd trimester test will be
considered together.If it is normal, then OK. If it is abnormal, then
amniocentesis.
Sequential test: 1st Trimester test and NT will be considered first, if
abnormal, then CSA. if it is normal, then 2nd Trimester, if it is normal,
then OK. if it is abnormal, then amniocentesis.
Integrated test is more sensitive than sequential test.
The above information is only for education. |
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az 发帖数: 16686 | 34 关于唐氏检查,每个医生的要求不同,有的比较aggressive,超过35岁就建议直接羊穿
或者CVS,好处是结果是确定的,好就好不好就不好,坏处是有流产的可能性。有的医
生还是让超过35岁的孕妇先做Screening,Screening有好几种,你去精华区好好查一下
,最准确的一种叫做sequential screening,是12周左右先做B超测脖子什么厚度来着
,外加一次抽血,然后16周左右再一次抽血,所有结果综合你的年龄家庭史,做出一个
估计,比如你的孩子是唐氏儿的概率是1/1000之类的。对于每个年龄的孕妇,唐氏儿的
概率有一个cutoff值,比如36岁似乎是1/200左右吧(我的理解就是36岁的孕妇生出来
唐氏儿的概率是1/200,我的理解可能不对,呵呵),如果你的screening结果高于你的
年龄的cutoff值,比如1/50>1/200,医生可能就会建议你做羊穿来确定结果。
screening的好处显而易见,没危险。坏处是,测到结果好有可能事实是孩子不好,测
到结果不好孩子也有可能好,前者应该概率比较低,不过遇到就自认倒霉了;后者叫假
阳,sequential scre... 阅读全帖 |
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n********i 发帖数: 87 | 35 我的 first trimester blood test result 结果不好,Down syndrome 比例1/100, 于是下了决心做羊穿!
在15周的时候,我又不死心,继续做了sequential blood test (这个通常是first
trimester screening 结果不好不坏的时候做,比如1/500,正好在cut-off 的值附近
。我的OB 死活不让做,认为完全没有意义,只有羊穿才是Diagnostic的结果,我就让
我的genetic counselor 帮我安排作了)。结果没想到结果出奇的好,1/10000。 两次
结果相差一百倍。
我的OB似乎也对这个结果很意外。 他的意见是baby 很可能是正常的,但是也只有羊穿
可以确诊。Genetic counselor 也很少遇见这样的case, 因为通常都直接安排羊穿,不
会做sequential blood test.
现在真的不知道要不要折腾做羊穿了。感觉这种screening test 像胡闹一样。为了这
两个这么矛盾的number, 要不要在肚子上扎一针呢? |
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p****a 发帖数: 318 | 36 呃。。。说得我自己也糊涂了,刚刚看了一下
原先我问的那个叫sequential screening,包括12周的验血、B超和16周的验血,好像
也叫integrated screening
quad screening就只是16周验血,我还没做
当时医院就说sequential不是所有保险公司都cover,所以自己要问了以后决定是不是
做,但是quad都给做,我就默认保险cover了。。。
不知说得对不对 |
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s**********g 发帖数: 243 | 37 今天收到两个账单,
第一个sequential screen stage1,共142,除去adjustment和insurance paid,我自己
付9块多,没有问题。
第二个sequential screen stage2,共304,没有adjustment保险也不cover,要我全付。
上面的账单应该是唐筛的,第一次验血加NT,第二次就是抽了两管血,为什么要300啊
?不知道有没有argue的必要呢。我的保险是aetna ppo。
非常感谢。 |
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w******0 发帖数: 4472 | 38 第二次的为啥保险不包? 原因得问清楚。
如果是医院的CODE错了,找OB改CODE去。我曾经遇到过OB两次写错CODE。
比如,把孕期检查的CODE写成了普通妇女体检的CODE,我的保险不包含体检。
我还遇到过一次,是医院的检查项目过多,而保险建议的孕期检查不包含某项目,
所以96刀要我自己付。 我找的医院,就是去例行检查的时候,他们有个管保险的
女的,帮我直接把96刀抹了,一分钱不用交。 :)
今天收到两个账单,
第一个sequential screen stage1,共142,除去adjustment和insurance paid,我自己
付9块多,没有问题。
第二个sequential screen stage2,共304,没有adjustment保险也不cover,要我全付。
上面的账单应该是唐筛的,第一次验血加NT,第二次就是抽了两管血,为什么要300啊
?不知道有没有argue的必要呢。我的保险是aetna ppo。
非常感谢。 |
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n****y 发帖数: 6260 | 39 Sequential doesn't work, the diodes only passes current in one direction. If
sequential, nothing happens if you turn the wheel in one direction, and
both thing come on when you turn it the other direction. |
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n****y 发帖数: 6260 | 40 It should be on at the same time IF it is sequential; now, obviously that is
not the case, which means the circuitry is not sequential. |
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t*******r 发帖数: 22634 | 41 俺歪一下楼先,俺觉得有关语言的问题,找专家和父母自己努力不矛盾。双管齐下
是最佳策略。
因为专家有专家的长处,其专业素质是父母无法企及的。但父母也有父母的长处,
比如,贴心、肯花时间、等等。。。
其实俺一直怀疑俺家的俩娃,有过语言一定程度的相对 delay。(但应该没有
绝对 delay 就是了)。
比如俺家小娃,在两岁班前被老师认为 super-smart,看小班几个娃玩
spatial/pattern toy 很明显。但是在两岁班的时候,老师曾经因为娃显得非常
quiet,曾仔细问娃家里说不说英语,跟她姐姐说不说英语,是不是看得懂英文娃
电视。。。其实小娃是三个月就上全英文 daycare 的,并且我们对娃的 verbal
也是很重视的,家里还有一个跟娃说英文的姐姐。。。
我现在的看法是,spatial-thinking 的娃,还有 analytical-thinking
的娃,不仅在语言的 developmental stage 会有所差别,学习语言的角度
也会有所差别。有点像音乐教育里的 “绝对音准 vs 相对音准” 那个意思。
当然我显然不是娃教育专家,我只是说说我的民科看法... 阅读全帖 |
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a****g 发帖数: 3027 | 42 我觉得 spatial-thinking 的娃的困难是:语言是 sequential 的。
如果娃的内心 thinking 的 mode 更趋向于 spatial 的话,speaking
的时候,大脑可能需要做 spatial-to-sequential 的 conversion,
一定程度上可能增加初始开口说句子的难度。。。
我觉得 analytical-thinking 的娃的困难是:娃初始的语言教学里,
sensory information 的直接表达占有很重要的比重,比如 “I see /
I feel / 等等”。。。而 analytical-thinking 的娃,思维中
可能更注意事物之间的 relation / connection / correlation
/ causal-effect / reasoning,而在语言初期造成一定程度的表达
困难。。。
而有时候父母由于 traits 的 inherit,可能有时更容易 understand
特别的娃,有时更知道何种方式 feed 特别的娃 information/language
会更有效些。。
~~~~~~~... 阅读全帖 |
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t*******r 发帖数: 22634 | 43 我觉得你说的关于,“书本上的 1-2-3 容易掌握,并且对大多数娃或多
或少适用,但是可能效果不强或者有副作用。”。我觉得原因是:书上的
规则要简单到能保证大多数人阿猫阿狗,在大多数情况下都能用,但是
既然阿猫阿狗都能用的规则,其有效性/副作用估计也是一命二运三风水
。。。不能要求太高。。。
用 math 打个比方,比如小学课堂数学题,1-2-3 rule,一步一步老老
实实解,就完事了,保证总能把题解出来。为啥,因为你丫是小学课堂
数学题有木有!!!能有多难?
但是谁要是想用 1-2-3 rule 的方法去解 math-puzzle,基本很翘
很翘。。。(math-puzzle 不就是逗你玩题目么?)如果有人想写本
1-2-3 rule 解决所有 math-puzzle,我觉得不如去写本 1-2-3
rule 秒杀卡斯帕罗夫,更现实点。。。
或者理论一点的说法,math-puzzle 本质上不是可以用简单的
sequential-procedure 可以解的,而 spatial-thinking
没有啥诸如 1-2-3 这么绝对的并且这么 sequential 的
rule/proc... 阅读全帖 |
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t******l 发帖数: 10908 | 44 我觉得乘法计算主要是 procedural memory(implicit memory 的一种,associative
)。也就是你想到 5*8,就跳出来 40,而不是真的大脑在 81 个格子里找。
Sequential 地背诵九九乘法表,是把 81 个格子直接装进 explicit memory (
declarative memory),然后在做真正的乘法时,用记忆下来的 declarative memory
来训练 procedural memory。
但是另一方面,乘法可以从加法一步步数出来,所以不背诵九九乘法表,一样可以
training 乘法运算的 implicit memory,也靠多多 work out 乘法结果,也 training
了 implicit memory。
所以我觉得取决于娃,如果娃抗拒 sequential 地背诵九九乘法表(指三年级以前),
这种情况下我觉得还是不要先死记硬背,慢的就慢的,熟能生巧也行,或者时辰一到娃
自己愿意背了也行。
:Google了一下这个苏博士,她的4个孩子都在10-14岁进的大学。可是这些孩子后来怎
样却查不到了。如果他... 阅读全帖 |
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n********p 发帖数: 434 | 45 * Sequential read throughput: 64GB - 250MB/sec. read
* Sequential write throughput: 64GB - 145MB/sec write
我觉得还行。 |
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C*********g 发帖数: 918 | 47 这个SanDisk Ultra SSD的速度
Max Sequential Read Up to 280MB/s
Max Sequential Write Up to 270MB/s
好像写速度比M4还快点,但读速度不如M4。
哪一个更好我不知道,反正买照相机的CF卡SD卡,别人都是首推SanDisk的牌子,认为其他的牌子不行,特别是kingston的CF卡,简直就是垃圾。 |
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b*****e 发帖数: 53215 | 48 Part Number: CT256M4SSD2
?Sustained Sequential Read: Up to 500 MB/s(SATA 6Gb/s)
?Sustained Sequential Write: Up to 260 MB/s(SATA 6Gb/s)
?4KB Random Read: Up to 45,000 IOPS
?4KB Random Write: Up to 50,000 IOPS
为其他的牌子不行,特别是kingston的CF卡,简直就是垃圾。 |
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b********y 发帖数: 5829 | 49 Apple stomped, squashed, creamed and pancaked Wall Street’s expectations
for quarterly results Tuesday. Here’s are a few effusive takeaways from
the scribbling masses of analysts covering Apple.
Morgan Keegan: “Has Any Company Ever Grown A $50B Revenue Stream by 50%?
iDoes … Most of Apple’s out-performance was in iPhone, which remarkably
was flat sequentially, vs. normally what is a down sequential quarter.
Europe, Japan and APAC all grew over 100% year-over-year, and we suspect
at least 2/3rds |
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d***y 发帖数: 2567 | 50 基本上top the line.重点是gross margin可以保持,并提高。ldk的盈利能力还没有发
挥出来。就像武功高手,只使出了5成功力。哈哈。我只能说,这个价位买了不怕被套
但是,最怕但是了。solar中,ER不管好坏,都是ER后大跌。这次日本的nuke事故,是
不是翻盘的契机?
转一个hobo的看法:(hobo我一直在跟踪他的分析,比较靠谱,偏保守)
They turned on the machines daily. Nothing blew up. That's all I've been
asking for. Margins continue to inch up. Still a bit more of their installed
capacity yet to be realized.
Since their report explains next to nothing, it's hard to tell what happened
with two line items that differed from what I expected:
1) g&... 阅读全帖 |
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