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全部话题 - 话题: layering
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b*****n
发帖数: 618
1
我来试试看吧,
batch process layer和real-time process layer共存,原因是real-time layer没
有batch layer那么reliable,做process的限制比较多,no data loss/exact once/
deduplication real-time做是很困难的,但是latency比较低,所以如果需要比较快
的响应时间,real-time可以提供近似的result。
batch layer相对来说较慢,但是因为是一个batch一个batch来做,可以比较好的
checkpoint和处理failure和deduplication,所以process的结果比real-time更准确。
lamda architeture利用两者的优点和互补性,real-time会提供low latency但是精确
度稍差的数据,但是之后会被batch layer的覆盖产生比较准确的结果。
m*****b
发帖数: 13
2
来自主题: JobMarket版 - Multiple job openings in Pasadena, CA
QUANTIL is a high growth, pre-IPO startup in Silicon Valley, backed by the
world’s second largest CDN, ChinaNetCenter. QUANTIL helps customers reach
new markets by accelerating their content on our global network. We control
over 500 POPs and 30,000 servers, which generate 7 Tbps of throughput.
Mobile, Website, Download, Video, Audio, Enterprise Application and Carrier
Acceleration, we do it all.
Our team strives to simplify IT. Our long term focus on creating true value
safeguards both our cust... 阅读全帖
c******7
发帖数: 2586
3
来自主题: Boston版 - Radon test 4.7
our reading was at 2.1 I think, basically 4.7 is right around the state
limit 4 pCi/L so you are not off too much.
If you still want this house 4.7 reading could force seller to spit out some
serious cashback, so make sure you leverage this. There are several ways to
lower your Radon readings:
A. Gas Permeable Layer
This layer is placed beneath the slab or flooring system to allow the soil
gas to move freely underneath the house. In many cases, the material used is
a 4-inch layer of clean g... 阅读全帖
D**0
发帖数: 2048
4
来自主题: SanFrancisco版 - [合集] 我请V修车的经历
☆─────────────────────────────────────☆
gowildcat (老树临风) 于 (Tue Mar 1 18:24:51 2011, 美东) 提到:
只是描述过程,不多作评论。Never talked about this to anybody before, because
it's in the past and I don't care too much about it.
车子在柱子上擦了。说轻不轻,说重不重, 但很难看。有两块panel要处理。车子当时
刚过6年,body保养很好。
周5晚drop off的车,说好两天后晚上取。V asked for total $300. Honestly, it's
a good price, even though I did not price check with anybody else.
At the time when I went to get the car, it's not totally fixed, but looked
much better. Victor sai... 阅读全帖
b******o
发帖数: 5644
5
来自主题: GunsAndGears版 - 没有人舞刀? 俺买的日本刀收到了
Knife Steels Steel Type Characteristics Approximate Rockwell
Hardness
10A also referred to as AUS-10. 60
17-7 PH Good corrosion resistance, excellent for water sports
applications. This alloy is a chromium-nickel-aluminum precipitation
hardening stainless steel with good edge retention. Great corrosion
resistance generally means a high chromium content, and this means knives
made with this steel will be a little harder to sharpen than blades with a
lower chromium content.... 阅读全帖
n****o
发帖数: 14771
6
来自主题: Fashion版 - [合集] donating hair for cancer
☆─────────────────────────────────────☆
LifeHouse (Victoria) 于 (Tue Dec 6 09:57:36 2011, 美东) 提到:
大家有没有想过?grow your hair and donate it to charity so that more people
may feel beautiful, especially those who are female cancer patients?
☆─────────────────────────────────────☆
Gilda (屠龙公主,好女不跟女斗) 于 (Tue Dec 6 10:01:52 2011, 美东) 提到:
是好事。~~~
我愿意donate给除了pink ribbon以外的其他组织。pink ribbon不给。
☆─────────────────────────────────────☆
LifeHouse (Victoria) 于 (Tue Dec 6 10:09:39 2011, 美东) 提到:
还... 阅读全帖
b*****e
发帖数: 14299
7
来自主题: PhotoForum版 - 春节联欢会--自peng
虽然是不久以前的帖子,但是比较难找,我转说一下,应该是按照他的方法。
不管原图如何,再建一个新的可调节层A,置于原层上,设模式为color.
即使用命令Layer/New Adjustment Layer/Hue Saturation, mode=color,
弹出的hue/saturation窗不管。OK结束。
再建一新层置顶,layer/new adjustment layer/Hue saturation, mode=normal,
弹出的hue/saturation窗中设saturation=-100.OK结束。
面版上选择层A,菜单上选择layer/change layer content/hue saturation,
可以调节6个通道的hue saturation lightness等等,直到满意摁OK为止。
hue不宜调节过多。
现在想想这样做比channel mixer好的是它有6个通道可调,并且可调内容
远比channel mixer多。所以更好一些。
记得原文有这么一句话:这种作出来的黑白是后娘养的,真黑白是亲娘养的,
但是都是黑白,管它亲娘养的还是后娘养的。
y*b
发帖数: 3190
8
http://www.sonyalpharumors.com/sony-to-work-with-invisage-on-ne
"Invisage CEO Jess Lee stated that Sony is likely to become a Invisage
partner to make the first mass production Quantum film stacked sensors in
2016. The sensors will be first used on smartphones because one of the main
advantages of the new tech is the much thinner sensor. But the new tech
could be used on larger Digital Camera sensors too because of the higher
performance. Quantum Film sensor tech explained via Wikipedia:
Quantum... 阅读全帖
a***t
发帖数: 39
9

when
Clarifying some concepts first:
1. Switch operats on the layer 2, data link layer (of course, the regular
switch, not the layer-3 or layer-4 switch)
2. Router operates on the IP layer, layer 3
So, to answer you question:
Switches don't know the routing. If they are connected to the same subnet,
nothing needs to be done. If they are connected to the different subnet, you
need to put a router between them. Switch isn't counted as a hop, router is.
Same applies to the second question, if no s
g*****g
发帖数: 34805
10
I can't agree with your approach. The relevant characteristics of OOP here
is encapsulation. Encapsulation means the class maintains some states, and
define some behaviors to operate on these states, it doesn't have
intelligence, that's not part of OOP.
J2EE deals with complicate problem. And it typically has layered structure.
Most complicate systems in the world are using a service-oriented
architecture. But that still doesn't deviate from what OO is about. Every
single service maintains state... 阅读全帖
d****i
发帖数: 1038
11
来自主题: EE版 - 一个通讯传输速度的问题
sorry, my bad. I was confused. damn...
You are right. it is physical layer rate, more accurately, physical layer
net rate.
data link layer uses this rate to transmit data, i.e., it is the service rate provided by the
physical layer.
data link layer has other overhead such as ARQ, which will make the actual data link layer rate much lower than the claimed
physical rate...
g*********n
发帖数: 808
12
GaAs vs. Si from wikipedia
Comparison with silicon
GaAs advantages
Some electronic properties of gallium arsenide are superior to those of
silicon. It has a higher saturated electron velocity and higher electron
mobility, allowing gallium arsenide transistors to function at frequencies
in excess of 250 GHz. Unlike silicon junctions, GaAs devices are relatively
insensitive to heat owing to their wider bandgap. Also, GaAs devices tend to
have less noise than silicon devices, especially at high fre... 阅读全帖
f*******g
发帖数: 55
13
来自主题: EE版 - Another question about wifi
I'm running some test based on 802.11n using iperf.
iperf allows me to specify the size of a data packet. However, 802.11n
introduces packet aggregation mechanisms (i.e., A-MSDU and A-MPDU). As a
result, the packet size on the MAC or PHY layer may not be equal to the
packet size specified in iperf.
Is there a way to know the length of the data packet on the MAC layer and
PHY layer before a transmission?
I tried wireshark, but it only analyzes the packet structure above the MAC
layer, and it does... 阅读全帖
h***i
发帖数: 75
14
来自主题: Physics版 - 光表面反射的Magneto-Optic 问题
关键是cap layer没有磁性,光在空气和它的界面处发生的反射怎么会有kerr rotation?
只要doped GaAs的光学常数和cap layer的不同,cap layer下表面处必然会有反射并带
来kerr rotation。
如果lz能测出在817nm附近的cap layer和doped GaAs的光学常数(对有磁性的介质(这里的doped GaAs?),光学常数对左旋和右旋圆偏振光不同或者直接测voigt constant),在cap layer厚度已知的情况下,考虑cap layer的多重反射带来的kerr rotation是完全可以按我说的那篇文章的方法数值计算出来的。
w*******y
发帖数: 60932
15
OK
To start off with, these are NOT gaming systems. These towers are for:
-People that are still running P4 machines (you know its time to upgrade)
-Moms/Dads/Grandparents
-Office machines
There are several to choose from. Stock on hand will probably vary by the
time I finish making this post.
You will probably have to pay tax.
UPS ground shipping is free
Here are a few of the deals
____________________ ____________________ ____________________ __________
___
IdeaCentre K330B - Scratch & de... 阅读全帖
w********7
发帖数: 1043
16
借道问一下哈,没听过这种Hybrid SACD, WIKI了一下,发现它是有DSD layer和PCM
layer(非HD),如果放进普通CD机去读,只能读取PCM layer,因为普通CD机的光头和
SACD光头的焦距不一样无法读取DSD layer的音频。
那么用普通CD机去听Hybrid SACD的PCM Layer, 效果也会比听同曲目普通CD版的效果
要好么?
w******t
发帖数: 241
17
不能用现有的操作系统,最好能说明软件架构的数据结构实现。
比如要求支持每个module(比如每个layer)的独立架构,每个layer限制只能与其相邻
layer通信,layer之间可能会有新的layer加入。另外需要做到不同优先级的调度,比
如控制packet要优先于data,部分任务需要满足RTOS的条件。然后需要设计功耗管理控
制。
听起来就是基本要求,不过实现起来有没有比较难的地方?
j*****y
发帖数: 1071
18
写了一个code
bool isLeftOneMoreLayer(TreeNode * root, int layer, int & moreNodes)
{
if(!root->right && layer == 1 )
{
return false;
}
if(root->right && layer == 1)
{
moreNodes += 2;
return true;
}
if(!isLeftOneMoreLayer(root->left, layer - 1, moreNodes))
{
return false;
}
if(!isLeftOneMoreLayer(root->right, layer - 1, moreNodes))
{
re... 阅读全帖
v********e
发帖数: 1985
19
来自主题: Living版 - stucco外皮的房子
There should be only one layer of wall structure that is water proof/
resistant. Any time you have 2 layers, the layer or layers between these two
layers are susceptible for mold.
m*e
发帖数: 188
20
TEMPUR® pressure-relieving material
* One Approx. 0.8" TEMPUR Comfort Layer (5.3 lbs./ft. density) — Softer
formula for enhanced responsiveness
* One Approx. 2.8" TEMPUR Support Layer (5.3 lbs./ft. density)
* Edge to edge, pressure-relieving comfort and therapeutic support for
deep, rejuvenating sleep
Base layer
* One Approx. 5" AirFlow System™ Base Layer
* Provides support to TEMPUR layers and increases air circulation
总共是0.8"+2.8"+5"厚
每层得软硬度不同
我是因为本身背不太好,所以才买这个的,
b********t
发帖数: 632
21
昨天party之后,朋友把忘记吃的lasagna 让我带回家,结果一下子就爱上它了,减肥
的姐妹真的可以试一试,解馋,低卡。烤一次,吃3天没问题,并且营养丰富,吃不了就放冰箱里,随吃随取。
那我这次减肥就叫lasagna减肥法
Zucchini - 4 medium - raw, sliced lenghtwise
Grandma's Spaghetti Sauce with Meat (could use store bought sauce with meat
but it is definitely not the same):
- Onion - 1 medium
- Red Peppers - 1 medium
- Ground meat - I used 96/4 but could be 93/7 - 1/2 lb
- Diced tomatoes - about 1 1/2 can
- Dry cooking wine (could use regular wine) - about 1 cup
- Chicken bouillon cubes - 2 (individ... 阅读全帖
s*********8
发帖数: 21
22
来自主题: Outdoors版 - Arc'teryx Beta AR Jacket - Women's $237
一般out layer已经考虑到可能穿base layer或者middle layer了,一般来讲,你穿S的
base layer 和middle layer,就买S的可以了,如果你的体型很宽大,可能需要大一号
。beta AR是Athletic fit, 比较修身。BTW,$237价格很不错,可以出手了。
a*******a
发帖数: 5
23
来自主题: Soccer版 - adidas双层球衣的奥秘
终于明白了。。。
DYNAMIC LAYERING CONCEPT
On the field of play adidas' top teams can be found wearing DLC kits.
DLC comprises two high-tech layers to enhance athletes' physical performance.
The SKIN LAYER (Skin Jersey, Power Short and Power Socks) provides muscle
support, ventilation and moisture management. The OUTER LAYER (Outer Jersey,
Protection Socks, Protection Short) provides protection.
SKIN LAYER
The semi-fitting lightweight under jersey incorporates ClimaCool for optimal
moisture movement and
l*****s
发帖数: 1754
24
来自主题: PhotoForum版 - 三张Yosemite
from the last image LZ posted,
1. image->adjust->shadow and highlight
2. duplicated layer, in multiply mode, add layer mask, image->apply image to
layer mask using merged RGB at normal mode->blur layer mask at 20 pixel
3. convert file to LAB, adjust curve, steepen channel a, and b, and it
turned out blue is too much. in layer mask, image->apply image->merged
channel b, then dial down opacity to my taste.
4.at the point I noticed there is a blue overcast in the original, and
steepen curved of cha... 阅读全帖
O*******d
发帖数: 20343
25
来自主题: PhotoGear版 - 柯达Kodachrome冲印服务即将终止
Kodachrome的颜料是在冲洗的时候才加的,冲洗后的胶片的暗保存期很长。
冲洗过程很复杂,基本上不可能手工冲洗。
需要红光fog一次,蓝光fog一次,化学fog一次。
Kodachrome的胶片表面可以看到图像的浮雕。
Kodachrome processing has undergone four significant alterations since its
inception.[25] The current
process is designated Process K-14. The process is complex and exacting,
requiring technicians with
extensive chemistry training, as well as large, difficult-to-operate
machinery. This effectively precludes
amateurs or small laboratories from processing Kodachrome.[citation needed]
Fir... 阅读全帖
b******g
发帖数: 3616
26
文章有点长,如没耐心看完,可直接跳转到总结部分.
---------------------------------------------------------------------
这篇帖子的动机来源于版上对锐化的提问及讨论帖:
http://www.mitbbs.com/article_t/PhotoGear/35032079.html
锐化是一项对最终成片效果影响很大的后期技术,尤其是当成片要打印或上传到各种对
尺寸要求有严格限制的网站分享时。锐化技术本身并没有多少难度,但如何正确地应用
在不同场合和不同需求,当中的技巧却不是每个人都知晓的。我想通过这篇文章对PS锐
化技术从原理到应用上有个比较全面的介绍,然后让读者自己思考之前自己所用的锐化
技术是否合理,应当采用哪种技术进行改进。这将是一篇比较枯燥的技术文,因为时间
和MITBBS排版问题的限制,我不打算贴图来解释说明。也许以后有时间了会补上更生动
的例子。
---------------------------------------------------------------------
1.照片“锐”与锐化的关... 阅读全帖
H*******g
发帖数: 6997
27
nothing about MVC.
MVC is just for the presentation layer.
Looks like you need a Data Layer and a Business Layer.
For the data layer, try nHibernate, since you are using Oracle. Map all the
tables from the database into classes.
SoA is my recommendation for the business layer. The Request-Response
pattern is very nice to have.
People are lazy, therefore, if it is a solid working product, it is not
necessary to make any change. :P
z**r
发帖数: 17771
28
来自主题: EmergingNetworking版 - 今天的一个multicast session很失败
有肯定还是有的,不管几G,从cell site总得出来吧,厚厚。而且这段是所有运营成本
里占最大头的一块儿,怎么可能没有了。4G里照样需要aggregation。
这段backhual可以是layer 2(比如纯carrier ethernet),也可以是layer 3(纯IP网
),也有layver 3 over carrier ethernet,最后这个可能在美国更加普遍些,因为不
管哪家的coverage都没有那么大,很多都要租用其他家的carrier ethernet。
不管哪种,都可以有multicast需求,纯layer 2(其实也是一张layer 3/mpls网,只不
过上面提供EVC而已)有IGMP Snooping的需求,layer3的就不用说了,现在新的cell
site router一个重要feature就是要支持PIM,不过大部分只需要static RP就可以,没
有auto-RP or BSR的需求。毕竟现在有刚性需求的BACKHUAL还很少很少,不代表1、2年
之后需求不强劲。而且现在好多项目都被IPV6给占了。
对于基于PON的backhaul,不是很熟悉... 阅读全帖
s*******8
发帖数: 12734
29
You know switch how to learn port number,right? Then why ask such a question.
There isn't any technology at PHY layer, and PPP definitely not at PHY layer.
I guess you know MAC layer is sub layer of layer 2.

broadcast
c**i
发帖数: 6973
30
来自主题: Hardware版 - ITRI Flexible Display Meets Skepticism
Tim Stevens, ITRI shows off 6-inch FlexUPD AMOLED, hybrid 2D/3D display,
makes lots of promises. Engadget, Oct. 29, 2010.
http://www.engadget.com/2010/10/29/itri-shows-off-6-inch-flexupd-amoled-hybrid-2d-3d-display-make?icid=sphere_blogsmith_inpage_engadget
My comment:
(a) AMOLED stands for Active-Matrix Organic Light Emitting Diode.
(b) As a rule of thumb, the press release from ITRI sounds too good to be
true for professionals (not me: I know nothing).
(c) While in the above page, click "sw se... 阅读全帖
r*****l
发帖数: 2859
31
Carefully architect your system to:
1, Create layers.
2, Create loosely-coupled layers.
3, Make layers easily clustered.
4, The horizontal expansion of one layer should not affect other layers, and
should not require down time.
5, Leave hooks for logging/tuning.
6, Make deployment build on convention and metadata driven.
z*****n
发帖数: 7639
32
来自主题: EE版 - 请教一个TCP的问题 (转载)
It depends on how these packets are re-assembled by
the IP layer.
If the TCP layer at the receiver receives incoming
packet (from its own IP layer) one by one, then
individual ACKs are sent back. If IP layer buffers
several packets and sends to TCP together, then
the last one is ACKed. Actually I am not sure the
mechanism of IP layer re-assembly function. This
question is also open to me...
w******t
发帖数: 241
33
【 以下文字转载自 JobHunting 讨论区 】
发信人: webcraft (此处不留爷,自有留爷处;处处不留爷,爷, 信区: JobHunting
标 题: 怎样设计一个无线网络通信系统的软件架构?
发信站: BBS 未名空间站 (Wed Feb 29 17:41:12 2012, 美东)
不能用现有的操作系统,最好能说明软件架构的数据结构实现。
比如要求支持每个module(比如每个layer)的独立架构,每个layer限制只能与其相邻
layer通信,layer之间可能会有新的layer加入。另外需要做到不同优先级的调度,比
如控制packet要优先于data,部分任务需要满足RTOS的条件。然后需要设计功耗管理控
制。
听起来就是基本要求,不过实现起来有没有比较难的地方?
l***d
发帖数: 1828
34
http://www.nature.com/news/2010/101118/full/news.2010.620.html
Nobel prize committee under fire
Errors lead to accusations that committee did not do its homework before
making the 2010 award for physics.
A high-profile graphene researcher has written to the Nobel prize committee
for physics, objecting to errors in its explanation of this year's prize.
The award was given to Andre Geim and Konstantin Novoselov of Manchester
University, UK, for their work on graphene, a two-dimensional carbon
stru... 阅读全帖
s*****u
发帖数: 164
35
来自主题: Physics版 - 还是说说香蕉球是咋回事吧
http://en.wikipedia.org/wiki/Magnus_effect
When a body (such as a sphere or circular cylinder) is spinning in a viscous
fluid, it creates a boundary layer around itself, and the boundary layer
induces a more widespread circular motion of the fluid. If the body is
moving through the fluid with a velocity V, the velocity of the thin layer
of fluid close to the body is a little greater than V on the forward-moving
side and a little less than V on the backward-moving side. This is because
the induce... 阅读全帖
d*******o
发帖数: 493
36
来自主题: Statistics版 - Statistical Analyst - Beijing
Field: marketing
OS layer -> ETL layer -> Database layer-> Analytics layer-> Report layer
Skills:PC SAS Access/SAS SAS Excel
Value : 0 2k 0.5k 2k 1.5k

English: 1k
Overtime: 1k
a*********x
发帖数: 7174
37
来自主题: PhotoProcessing版 - [Alli Jiang] - [on my bed] - yuyu black
那action文件会超大吧~XD
我都是先duplicate layer,然后各种调,这么改改那边动动~
觉得不太好看就删了重新弄~
好看就留着~
一般好看就弄成半透明的~
我很多时候都这么用半透明的,因为有时候觉得颜色改太多了~
然后duplicate both layers + merge layers~
再duplicate这个layer继续改颜色~
改动步骤无敌多~
而且大部分都是这个layer加了点黄色那个步骤加了点蓝色X10~
所以就算有action也没用~=0=
C******g
发帖数: 2930
38
来自主题: _Playstation3版 - God of War III utilises 35GB of Blu-Ray space
Tim Moss, Director of Technology at Sony Santa Monica, has revealed the
monstrous amount of space that God of War III is set to take up on Blu-Ray.
In a tweet this morning, Moss states “#GOW3 35Gb of goodness. Thank heavens
for Dual Layer Blu-Rays”.
Blu-Ray capacity is currently averaging at 25 for single-layer, with this
doubling to 50GB for dual layered discs. Recent developments have also
allowed single-layer to reach a capacity of 33.4GB for single-layer, so it’
ll be an exciting time for Pl
w*******y
发帖数: 60932
39
Another Washburn deal from WMS.
Washburn WD16SCE Solid Cedar top with Abalone Bound Body, bound neck,
Fishman Preamp
MSRP $622.90
Reg $349.99
Sale $236.99
Free Shipping
Link:
http://www.worldmusicsupply.com/Washburn-WD16SCE-Dreadnought-Ac
Video Review
oDreadnought Body Shape
oSolid Cedar Top
oQuarter Sawn Scalloped Bracing
oMahogany Sides
oMahogany Back
oSatin Finished Mahogany Neck
oRosewood Fingerboard
oAbalone Soundhole Rosette
oMulti-layer Maple/Abalone Binding on Top
oMulti-layer Maple/Abal... 阅读全帖
w*******y
发帖数: 60932
40
MSRP $676.90
Reg $379.99
Sale $256.99
Link:
http://www.worldmusicsupply.com/Washburn-WD26SCE-Dreadnought-Ac
oSolid Cedar Top
oQuarter Sawn Scalloped Bracing
oRosewod Sides
oRosewood Back
oSatin Finished Mahogany Neck
oRosewood Fingerboard
oAbalone Soundhole Rosette
oMulti-layer Maple/Abalone Binding on Body
oMulti-layer Maple/Abalone Binding on Headstock
oRosewood Capped Headstock With MOP Washburn Logo & Stylized W Inlay
oMulti-layer Maple Binding on Back
oMulti-layer Maple Binding on Fingerboa... 阅读全帖
w*******y
发帖数: 60932
41
MSRP $622.90
Reg $349.99
Sale $216.99
Free Shipping
Link:
http://www.worldmusicsupply.com/Washburn-WD16SCE-Dreadnought-Ac
oDreadnought Body Shape
oSolid Cedar Top
oQuarter Sawn Scalloped Bracing
oMahogany Sides
oMahogany Back
oSatin Finished Mahogany Neck
oRosewood Fingerboard
oAbalone Soundhole Rosette
oMulti-layer Maple/Abalone Binding on Top
oMulti-layer Maple/Abalone Binding on Headstock
oMulti-layer Maple Binding on Back
oMulti-layer Maple Bound Fretboard
oMulti-layer Maple Bookmatch Stripe... 阅读全帖
L********t
发帖数: 1916
42
还是抄一段一位哲人的话吧:
I believe that the only force that can save us from self-destruction is
reason; the capacity to recognize the un-reality of most of the ideas that
man holds, and to penetrate to the reality veiled by the layers and layers
of deception and ideologies; reason, not as a body of knowledge, but as a "
kind of energy, a force which is fully comprehensible only in its agency and
effects..." a force whose "most important function consists in its power to
bind and to dissolve." Violence and... 阅读全帖
L********t
发帖数: 1916
43
还是抄一段一位哲人的话吧:
I believe that the only force that can save us from self-destruction is
reason; the capacity to recognize the un-reality of most of the ideas that
man holds, and to penetrate to the reality veiled by the layers and layers
of deception and ideologies; reason, not as a body of knowledge, but as a "
kind of energy, a force which is fully comprehensible only in its agency and
effects..." a force whose "most important function consists in its power to
bind and to dissolve." Violence and... 阅读全帖
e*****s
发帖数: 7359
44
you r right. i
in that case, it should be considered to be the primitive form of paper.
Papyrus is made from the stem of the papyrus plant, Cyperus papyrus. The
outer rind is first removed, and the sticky fibrous inner pith is cut
lengthwise into thin strips of about 40 cm (16 in) long. The strips are then
placed side by side on a hard surface with their edges slightly overlapping
, and then another layer of strips is laid on top at a right angle. The
strips may have been soaked in water long en... 阅读全帖
W*****B
发帖数: 4796
45
来自主题: Military版 - 古代印加帝国的祭祀真尼玛残忍
古代印加帝国的祭祀真尼玛残忍。
Exclusive: Ancient Mass Child Sacrifice May Be World's Largest -
National Geographic
https://apple.news/A2kHgistDRNKM4L-HviJu0g
Exclusive: Ancient Mass Child Sacrifice May Be World's Largest
More than 140 children were ritually killed in a single event in Peru more
than 500 years ago. What could possibly have been the reason?
Evidence for the largest single incident of mass child sacrifice in the
Americas— and likely in world history—has been discovered on Peru's
northern coast, ... 阅读全帖
j***j
发帖数: 9831
46
来自主题: Military2版 - The Internet’s Not Finished Yet (转载)
【 以下文字转载自 Security 讨论区 】
发信人: jindj (扎西德勒), 信区: Security
标 题: The Internet’s Not Finished Yet
发信站: BBS 未名空间站 (Fri Jun 6 17:49:32 2014, 美东)
http://sites.ieee.org/spotlight/internets-finished-yet/
Last year’s revelations about the US government’s surveillance of online
traffic were a wake-up call to provide better protection of user privacy and
confidentiality — including the regular use of end-to-end cryptography at
multiple levels in the protocol architecture. Vint Cerf, IEEE Fellow and
vice p... 阅读全帖
s***o
发帖数: 77
q**j
发帖数: 10612
48
来自主题: Automobile版 - 丰田汉兰达怎么样~~
这个wiki来的。看起来是firestone想省钱,少了一个layer。这一招平常管用,但是碰
上ford的车设计本来容易roll over,就不行了。看来两方面都有问题。
The Ford Explorer was first offered for sale in March 1990. Ford internal do
cuments show the company engineers recommended changes to the vehicle design
after it rolled over in company tests prior to introduction, but other than
a few minor changes, the suspension and track width were not changed. Inste
ad, Ford, which sets the specifications for the manufacture of its tires, de
cided to remove air from the t... 阅读全帖
W*******s
发帖数: 18705
49
你搬运的时候短时间侧躺一下估计问题不大但是也要尽量避免。这个楼主说是放车里运
输,No,No,No!我有三个电视机人运来,都是直立绑在Van,卡车里面的。
网上谁都说服不了谁,你爱咋地就咋地。有机会去店里问问小二,电视机为毛直立着摆
放。
摘录:
http://science.opposingviews.com/cant-lay-lcd-tv-flat-1572.html
The defining feature of a liquid crystal display set is its large screen.
Made up of a sandwich of layers of glass and other materials, LCD TVs are
extremely fragile. Because of the way that forces apply to large panes of
glass, laying them flat is almost always a bad idea, and moving them when
they are flat is... 阅读全帖
m****a
发帖数: 272
50
Sales for $199
Brand NEW ThinkPad Blu-ray Burner Ultrabay Slim Drive - SATA :
Stores up to 25 GB of data on a Blu-ray Single Layer disc and up to 50 GB of
data on a Blu-ray Double Layer disc.
Enables playback of high-definition Blu-ray movie content.
Supports read/write compatibility with multiple CD, DVD, and Blu-ray
standard formats including CD-R, CD-RW, DVD-RAM, DVD-R, DVD-RW, DVD-ROM, DVD
+R, DVD+RW, BD-R/BD-RE Single Layer, and BD-R/BD-RE Double Layer media.
Provides 8 MB buffer underrun p... 阅读全帖
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