a***a
发帖数: 12425 | 1 【侏罗纪公园】化石坑
看了一部纪录片，介绍了四个世界著名的化石坑，那里有着保存很完整的各种动植物化
石，这些化石使得我们对史前生态的重要阶段得以进行详细的分析了解，包括他们的外
观，内部构造，饮食习惯，社会生活等等。我看片子的时候做了些记录，上网查了查，
又存了些截屏图片，写个总结，也不知道符不符合征文的规定。如有错误疏忽遗漏或不
妥请指正。
(一) 伯吉斯页岩（Burgess Shale Formation），约五亿三千万年前
一九零九年，美国地质学家查尔斯•都利特•沃尔科特（Charles
Doolittle Walcott）在加拿大的洛基山脉进行野外探查，由于马摔跤无意间找到了一
块化石，随后他发现只有七英尺厚的伯吉斯页岩夹层是所有化石的出处。随后的两年内
，沃尔科特和他的儿子们共收集了六万一千多个样本，在所有发现中有三分之二是科学
新发现，包括以前从未有过的保存完整的软体动物化石。伯吉斯页岩的生物群种类相当
多，有食泥动物，滤食动物和掠食动物。沃尔科特直到一九二七年去世都在研究这些化
石，值得钦佩。
(二) 索伦霍芬石灰岩（Solnhofen... 阅读全帖 |
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a***a
发帖数: 12425 | 2 CharlesSong网友提供的新概念英语上的La Brea Tar Pit文章。重温一下吧（虽然我以
前只看了Puma一篇文）。
【 以下文字转载自 History 讨论区 】
发信人: CharlesSong (每只猫咪都需要定期体检), 信区: History
标 题: 地球上的昔日生命(新概念英语第四册26课)
发信站: BBS 未名空间站 (Wed Sep 26 10:54:16 2012, 美东)
你提到的La Brea tar pit,想起来在高中学新概念英语的时候看到过，怀念一下年轻时
的岁月：
L. G. Alexander: New Concept English, Book IV
19/49
It is animals and plants which lived in or near water whose remains are
most likely to be preserved, for one of the necessary conditions of
preservation is quick burial, and it is only in ... 阅读全帖 |
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P*****J
发帖数: 1745 | 3 照得真好啊，真是像箭一样射入水中。我以前以为入水速度顶多有个30-40mph，我刚查
了查，原来入水速度可以>100km/h(62mph)。想想车子在高速上开迎面的风有多大，以
那个速度扎入水中，乖乖。名副其实的水鸟中的战斗机。
Food Capture And Consumption
Opportunistic generalist predator on pelagic prey; feeds diurnally; may hunt
singly, but generally forages communally in large “frantic-flocks” of up
to 1,000 over shoals of prey fish. Although a generalist predator, Northern
Gannet is a feeding specialist whose unique combination of body mass, size,
and shape allow it to utilize, almost solely, a feedin... 阅读全帖 |
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C******g
发帖数: 2930 | 4 PS3
Price Updates
* Crash Bandicoot – Sale (PS3/PSP) (now $2.99, original price $5.99) **
Part of the PlayStation 15th Anniversary Sale
* Punisher: No Mercy – Sale (PS3) (now $4.99, original price $9.99)
* Jeopardy – Sale (PS3) (now $4.99, original price $9.99)
* Grand Theft Auto IV: The Lost And Damned – Permanent Price Drop (PS3)
(now $9.99, original price $19.99)
Games
* Crescent Pale Mist ($5.99)
Demos (free)
* Apache Air Assault Demo
* CSI: Fatal Conspiracy Demo
... 阅读全帖 |
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p****y
发帖数: 23737 | 5 http://www.vegetarian-nutrition.info/updates/vegetarian_diets_health_benefits.php
Recently, there has been a renewed interest in vegetarian diets. Today there
are countless books, cookbooks, and magazine articles promoting vegetarian
diets and providing guidance for those who wish to follow a meatless diet. A
Short Historical Perspective on Vegetarian Diets
In the past, many viewed vegetarianism as strange and faddish but
appropriately planned vegetarian diets are now recognized by many, includi... 阅读全帖 |
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c*********r
发帖数: 19468 | 6
this is the trough I mentioned yesterday
that's why direct-injection turbo can make a use of scavenging to reduce
turbo lag |
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c*********r
发帖数: 19468 | 7 光是baffled oil pan其实还是不能保证润滑正常，如果驾驶足够激烈的话，机油可能
根本回不到sump里，尤其对于润滑需求较高的多缸引擎、大排量、turbo等等，还是可
能引起润滑不足的问题，所以要再加上scavenger pump，这就是semi-dry sump了，
VR38DETT、S85B50，以及大多数Porsche都是这种 |
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l**********l
发帖数: 4468 | 8 我觉得要看车子的设计。有些车子完全用不到scavenge pump，有些车子没这个只有
baffled还是很容易挂。 |
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c**********9
发帖数: 135 | 9 提高响应的还有大的凸轮调节范围，40度（其实也不是很大）。高的清扫效率和
scavenging technique。
还有它连balancer shaft 也省了。 |
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V***b
发帖数: 3419 | 10 纸面上看M133很强大了，2250rpm lag也不差，我看review也这么说，"lag is
perceptible, but totally acceptable"，基本这意思吧。如果M133 lag是个问题的话
，STI和Evo自废武功算了，这两个lag绝对算比较annoying的了。对于M133来讲，big
twin-scroll turbo + two-stage intercooler + scavenging effect 的组合lag基本
被搞定了吧。
关于MPG问你个问题，如果现在这个1.8 bar + 8.6 compression ratio的组合MPG比较
难看的话，AMG为什么不选择降低些boost，提高些compression ratio的组合呢，同时
保持高马力输出？难道说现在这个组合MPG已经让人满意了？至少AMG公布的数字不错（
实际使用效果先不谈），德国车厂HP和MPG水分通常不大。
Mercedes A45
360 hp / 6000 rpm
332 lbft / 2250-5000 rpm
Audi S3
300 hp / 5600-6200 ... 阅读全帖 |
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V***b
发帖数: 3419 | 11 impulse charging说的就是scavenging effect吧 |
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j**i
发帖数: 184 | 12 1. 两个爆震因素 温度和压力 都让turbo 占了 只好降低压缩比 才能用可接受的点火
提前角达到扭矩目标 主要是低扭
2. 直喷和turbo的synergy岂是单纯直喷降低温度提高压缩比这样简单，其他重要的方
面还有冷启动的multi injection提高三元起燃速度，低扭完美运用scavenging，低负
荷实现分层减小cycle variation，，，，这些都是turbo 软肋
按照现在趋势，估计十年以后，自然吸气完全消失，各种增压比的 直喷增压 占据各种
细分市场
后，
= |
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p*********e
发帖数: 32207 | 13 为啥要动这个呢?
想提高动力直接刷boost pressure就好了,其他的都不如这个来的直接 |
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e**n
发帖数: 1326 | 14 说来好笑，主要倒不是为了动力，而是stock exhaust在highway cruise的时候有
droning...听得很烦。
我看了下parts diagram.
35i 的排气只有1个resonator （n20有两个。。。）,然后到最后面的muffler. 然后
muffler里面有一个电控的flap控制直排。问题是这个Flap常常在70 80mph的时候就已
经打开了，然后基本就是排气不经过消音，直接出去了。平时开开还ok,但是如果要开
长距离的话，比较恼人。。。 |
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x*b
发帖数: 5723 | 16 换BMW原厂的Performance exhaust.
★ 发自iPhone App: ChineseWeb 7.8 |
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y*******n
发帖数: 10103 | 17 他应该是说反了,高专下,进气valve timing要advance,主要是为了高转时增加intake
valve和exhaust valve的overlap,就是,进气和排气valve同时是打开的,这时排气的惯
性,会增加进气的效率,叫做scavenge effect.地转的时候反过来,应该retard intake
timing. |
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B*Z
发帖数: 7062 | 18 copy一段网上的quote：
To make the best use of scavenging effect, an equal-length exhaust manifold
is a must. Besides, to reduce the interence between the exhaust gas pulses f
rom different cylinders, the individual pipes shall be long. This explains w
hy most racing engines and high-performance engines employ tuned exhaust man
ifolds with very long and strangely routed pipes.
前两天碳大在比较新nsx和gtr的时候说到integrated exhaust manifold是个好事。好像
和这段话不一样。请问如和理解？ |
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e**n
发帖数: 1326 | 19 感觉是 turbo vs non-turbo 的区别。。。
上了 turbo后 scavenging effect的考虑就不怎么需要了吧？主要考虑exhaust port
to turbo距离短，pulse相位不干扰? |
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w*******y
发帖数: 60932 | 20 Kmart is has a big sale, an additional 50% off clearance Toys. There is good
deals to be found on Select Lego Sets, if you can find them.
LEGO 8088 Star Wars ARC-170 Starfighter $22.50
LEGO 8087 TIE Defender $18.50
LEGO 8060 Typhoon Sub $9.50
LEGO 8059-1: Seabed Scavenger $5.50
LEGO 8188 Fire Blaster $3.50
LEGO 7595 Toy Story Army Men on Patrol $3.50
LEGO 8057-1: Wreck Raider $3.50
LEGO 5969 Squidman Escape $2.00
LEGO Tiny Racers $2.00
This may be YMMV, however I checked two stores and both h |
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w*******y
发帖数: 60932 | 21 Boscovs has some decent deals on legos and also free shipping over 50.00 i
put together some scenarios below in the hopes it may help someone else out.
I did not put links to every item just do a search by name of set and it
will come up. I hope people wont thumb this down if its not for you please
be kind and move on to the next deal. I am no lego expert just a mom trying
to help out others who are looking to get bang for the buck.
Lego items found here
Link:
http://www.boscovs.com/StoreFrontWe... 阅读全帖 |
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w*******y
发帖数: 60932 | 22 Via the Dropbox Forums:
http://forums.dropbox.com/topic.php?id=30339&replies=2
:
quote
I'm very happy to announce the very first Dropquest! Dropquest will be a
special event that gives YOU a chance to win free space and fantastic prizes
not available anywhere else! While the actual event won't start until
Saturday, I thought I'd give you guys an idea of what to expect.
The Details:
Who: You!
What: Dropquest is a multi-step scavenger hunt that will test your wits and
knowledge. Expect to hop arou... 阅读全帖 |
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j****s
发帖数: 5092 | 24 【 以下文字转载自 K12 俱乐部 】
发信人: hanlin (告诉我你幸福), 信区: K12
标 题: 秀我女儿班的FIELD TRIP
发信站: BBS 未名空间站 (Tue Mar 2 15:20:09 2010, 美东)
10/21 Lands End Hike
11/4 Lake Boating
11/20 Contemporary Jewish Museum
12/3 Velveteen Rabbit Performance (Music show)
12/9 Conservatory of Flowers in Golden Gate Park
1/13 San Jose Children's Museum
1/28 Academy of Siences
2/1 Family Shelter visit and playground
2/19 Chinatown Scavenger Hunt and Chinese Restaurant
3/5 Visit family homeless shelter, donate socks
3/17 |
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h****n
发帖数: 419 | 25 10/21 Lands End Hike
11/4 Lake Boating
11/20 Contemporary Jewish Museum
12/3 Velveteen Rabbit Performance (Music show)
12/9 Conservatory of Flowers in Golden Gate Park
1/13 San Jose Children's Museum
1/28 Academy of Siences
2/1 Family Shelter visit and playground
2/19 Chinatown Scavenger Hunt and Chinese Restaurant
3/5 Visit family homeless shelter, donate socks
3/17 Hike and lunch at beach
4/7 Enviromental Education Center in Half Moon Bay
4/29 De Young Museum / Japanese Garden
5/ |
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K****y
发帖数: 2762 | 26 刚刚Google的,
http://www.guardian.co.uk/books/2010/may/12/best-childrens-books-eight-twelve-years
From the small genius of The Borrowers to the giants of children's books,
the Narnia stories, Lucy Mangan and Imogen Russell-Williams pick their must-
reads for 8-12 year-olds
Share105 Lucy Mangan and Imogen Russell Williams The Guardian, Tuesday 11
May 2010 Article historyStig of the Dump: Clive King
This was the first original Puffin published in 1963. The story of eight-
year-old loner Barney who b... 阅读全帖 |
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t********r
发帖数: 4908 | 27 ☆─────────────────────────────────────☆
hanlin (告诉我你幸福) 于 (Tue Mar 2 15:20:09 2010, 美东) 提到:
10/21 Lands End Hike
11/4 Lake Boating
11/20 Contemporary Jewish Museum
12/3 Velveteen Rabbit Performance (Music show)
12/9 Conservatory of Flowers in Golden Gate Park
1/13 San Jose Children's Museum
1/28 Academy of Siences
2/1 Family Shelter visit and playground
2/19 Chinatown Scavenger Hunt and Chinese Restaurant
3/5 Visit family homeless shelter, donate socks
3/17 Hike and lunch at bea... 阅读全帖 |
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m**k
发帖数: 18660 | 28 【 以下文字转载自 Lego 俱乐部 】
发信人: mark (花生，微爷远爷的爸爸), 信区: Lego
标 题: Star Wars Days at LEGOLAND Discovery Center Chicago
发信站: BBS 未名空间站 (Fri Jan 21 12:18:20 2011, 美东)
http://www.legolanddiscoverycenter.com/chicago/en/news-and-even
January 28th through 30th - The Jedi, Droids, and Clone Troopers return to
LEGOLAND? Discovery Center Chicago for three days of intergalactic fun as we
celebrate LEGO? Star Wars? Days from Friday, Jan. 28 through Sunday, Jan.
30 from 10 a.m. - 7 p.m.
The intergalactic weekend i... 阅读全帖 |
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g********n
发帖数: 2314 | 29 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: madmony (When you see the Japs, kill\'em all!), 信区: SanFrancisco
标 题: 恭喜Pleasanton
发信站: BBS 未名空间站 (Tue Jul 13 17:07:13 2010, 美东)
Made it to the best 100 cities to live list, at #67 but the only bay area
city that made it. Lots of valley cities made the Best-Places-For-The-Rich-
and-Single category though:
http://www.sfgate.com/cgi-bin/blogs/scavenger/detail?entry_id=6 |
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u*********e
发帖数: 9616 | 30 The hunt is on!
It's 1986. Russian spies are everywhere. Who do you trust? Whose side are
you on? In celebration of our Cold War rock musical, Chess, Signature
Theatre is sending you on a scavenger hunt of the city to the sites of Cold
War espionage. The locations are top secret. You must decipher clues along
the way, rendezvous with your contacts and access special code words. Are
you up for the mission?
Date: Saturday, August 28, rain or shine.
Time: 10:00am to 1:00pm
Teams: Up to four people |
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