O*******d
发帖数: 20343 | 1 多谢了。 hiking gps有高度应该是非常有用的。
the horizontal components. This is due to the fact that the vertical
component is not as constrained and is more sensitive to errors in
tropospheric delay. Precision in the vertical component increases with a
larger number of satellites being observed simultaneously as the correlation
coefficient between the vertical station coordinate and zenith
tropospherical delay decreases. |
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C*********g
发帖数: 3728 | 2 That's not the reason.
the horizontal components. This is due to the fact that the vertical
component is not as constrained and is more sensitive to errors in
tropospheric delay. Precision in the vertical component increases with a
larger number of satellites being observed simultaneously as the correlation
coefficient between the vertical station coordinate and zenith
tropospherical delay decreases. |
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b***k
发帖数: 2673 | 4 ☆─────────────────────────────────────☆
diphontine (Hello World) 于 (Fri Dec 28 15:18:06 2007) 提到:
very few people seem to get it, even though they all claim good at math...
Find an equilateral triangle on the curve X^3+3*X*Y+Y^3=1.
☆─────────────────────────────────────☆
zenith (相遇了，我还会走；永别了，我还回来) 于 (Fri Dec 28 15:57:21 2007) 提到:
what about this:
(-1,-1), (1/2+sqrt(3)/2,1/2-sqrt(3)/2), (1/2-sqrt(3)/2,1/2+sqrt(3)/2)
?
☆─────────────────────────────────────☆
jejune (孑孓) 于 (Fri Dec 2 |
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c********s
发帖数: 123 | 5 if it is surface of the earth:
given solar zenith angle mu
F = S0*mu*0.5 is the rough estimation. |
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r****y
发帖数: 1437 | 6
If your 0.5 represented in this way, then the cross section
of earth is pi*R^2, but the surface, even half of surface which
is instantneously exposed under sunlight is 2*pi*R^2, you use
cos(zenith angle) to represent it? Heihei. YUan Lai Ru Ci. |
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y****i
发帖数: 29 | 7
S0=1370W/m2 is before entering the atmosphere. Energy in 4nm
BW @ 550nm will be 0.11% of total energy. (assume 5800K
blackbody radiation). Then 1370*0.11%=1.5W/m2. Physics, you
can assume some reasonable number for reflection and
absorption coefficient for the atomosphere, and include
solar zenith angel for different time, then you will have an
answer. |
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s*******9
发帖数: 4458 | 8 那里有个zenith apartment,看着挺不错的，不过价格也会很不错，哈哈。 |
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f**d
发帖数: 768 | 9 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
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m*******r
发帖数: 7495 | 10 【 以下文字转载自 Fashion 讨论区 】
发信人: moonpolar (处女+天秤=双子), 信区: Fashion
标 题: Re: 请推荐手表牌子！
发信站: BBS 未名空间站 (Thu Jan 19 05:39:49 2012, 美东)
http://www.vogue-element.com/2010/09/swiss-watch-ranking/
总有一款在适合范围区间
Swiss Watch Ranking
Swiss Watch Federation announced ranking the top watch, the rankings
published by the Association of Swiss Watch
Premium Watch
Patek Philippe
Audemars Piguet
Vacheron Constantin
A. LANGE & SOHNE Lange
Breguet
Blancpain
Ulysse Nardin
Frank Muller
Glashütte
Girard Perregaux
First Cla... 阅读全帖 |
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d******0
发帖数: 22800 | 11 [感谢原帖作者 CCMR (花和尚)在俱乐部里]
顶级奢华品牌
百达翡丽 Patek Philippe，朗格 A. Lange & Söhne，爱彼 Audemars Piguet （
AP），宝珀 Blancpain，雅典 Ulysse Nardin，宝玑 Breguet，江诗丹顿 Vacheron
Constantin，格拉苏蒂 Glashütte Original，积家 Jaeger-LeCoultre
经典奢华品牌
万国 IWC，芝柏 Girard-Perregaux，卡地亚 Cartier，伯爵 Piaget，劳力士 Rolex
，真利时 Zenith，欧米茄 Omega，沛纳海 Panerai，百年灵 Breitling，萧邦
Chopard
经典豪华品牌
帝舵 Tudor，名士 Baume & Mercier，豪雅 TAG Heuer，艾美 Maurice Lacroix，
Nomos，万宝龙 Mont Blanc，宝齐莱 Carl F Bucherer，波尔 Ball，蕾蒙威 RAYMOND
WEIL，豪利时 ORIS，浪琴 LONGINES
亲民传统品牌
汉... 阅读全帖 |
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d******0
发帖数: 22800 | 12 [感谢原帖作者 CCMR (花和尚)在俱乐部里]
顶级奢华品牌
百达翡丽 Patek Philippe，朗格 A. Lange & Söhne，爱彼 Audemars Piguet （
AP），宝珀 Blancpain，雅典 Ulysse Nardin，宝玑 Breguet，江诗丹顿 Vacheron
Constantin，格拉苏蒂 Glashütte Original，积家 Jaeger-LeCoultre
经典奢华品牌
万国 IWC，芝柏 Girard-Perregaux，卡地亚 Cartier，伯爵 Piaget，劳力士 Rolex
，真利时 Zenith，欧米茄 Omega，沛纳海 Panerai，百年灵 Breitling，萧邦
Chopard
经典豪华品牌
帝舵 Tudor，名士 Baume & Mercier，豪雅 TAG Heuer，艾美 Maurice Lacroix，
Nomos，万宝龙 Mont Blanc，宝齐莱 Carl F Bucherer，波尔 Ball，蕾蒙威 RAYMOND
WEIL，豪利时 ORIS，浪琴 LONGINES
亲民传统品牌
汉... 阅读全帖 |
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d******0
发帖数: 22800 | 13 【 以下文字转载自 Watch_Timepiece 俱乐部 】
发信人: CCMR (花和尚), 信区: Watch_Timepiece
标 题: Movement Quick Reference Guide (ZZ)
发信站: BBS 未名空间站 (Mon Nov 22 01:08:49 2010, 美东)
一篇好文,有机芯价格，建议喜欢机芯的教友收藏。
http://alturl.com/ckves
机芯详细资料
http://tinyurl.com/23tapbj
表的知识
http://tinyurl.com/2fm3yh7
Movement Quick Reference Guide
ETA 2824-2
One of the more common automatic ETA movements. Commonly found in watches requiring a standard dial and date wheel. Beats at 28,000 BPH (beats per hour)
ETA 2836-2
Similar to the 2824-2, ... 阅读全帖 |
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d*******g
发帖数: 8992 | 14 既然来了，俺也水一帖。
俺的第一只自动机械表是Hamilton的Khaki Field,用H-21机芯，改自Valjoux 7750,储
时60小时（这是H对V7750的最大改进）。
表盘较小，38mm,有30分钟和12小时盘，完整日历（星期加日期），后背镂空，比较简
洁。
H家作为3、4线品牌，可能是Valjoux(ETA)775*系列比较值得的品牌，打折后经常在600
-800左右，可能也算唯一存在的美国品牌了，虽然已经被Omega大集团收购了。
比较想买的第二只表估计是Zenith El Primero系列，4650B便宜些，但比较范的还是
405系列。这个系列打折后在3300到5000左右，算还能勉强支付得起的。
PS，表已经带过一段时间，而且H家的外观不算精美，就不发照片了。 |
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J***o
发帖数: 7166 | 17 1，想平时casual或者dress都可以戴， 表链金属或者leather的有选择不？
bracelet和皮带可以各买一块先
2，牌子选择是否很重要？ 第一次买是否不要买太贵的？ １ｗ一下的是否就可以了
？好像表贬值也挺快的
牌子当然重要 好牌子保值甚至升值 第一次买可以不要太贵 第一块纯粹玩 了解结构性
能用 您的预算高的惊人 膜拜富豪 可以从欧米茄 豪雅 便宜的万国 年轻款的劳力士中选
３，我看中了这块表。http://www.ashford.com/us/watches/zenith/el-primero/el-primero-36'000-vph/03-2040-400-04-M2040.pid?nid=cpg_cat6071&so=45
不懂表的牌子 ｚｅｎｉｔｈ和ｒｏｌｅｘ是同档次的表不？
真力时有top level的机芯制造工艺 但表盘设计和品牌开发一直是弱电 实质和劳力士
是一个级别的 但在美国的保值能力差劳几个档次 要上真力时建议买经典款 |
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z********e
发帖数: 789 | 18 收藏的话，要十万RMB 才算是界线吧。
目录
1 特级表
2 一类一等
3 一类二等
4 二类一等
5 二类二等
1 特级表
2 一类一等
3 一类二等
4 二类一等
5 二类二等
6 三类品牌
7 四类品牌
8 五类品牌
9 独立制表人品牌
10 时装品牌
11 未能分类品牌
此分类为名表百科参考早年国家进口手表分类办法，结合目前手表品牌的工艺发展、市
场变化、收藏和拍卖市场估价等情况综合排名产生，也部分参考了互联网口碑因素，目
的是便于打算购买手表的朋友一目了然的知道手表的大致价值，以防你购买到电视购物
中“劳斯丹顿”这样的假名牌。有不足之处欢迎指证。
排名主要针对品牌的档次价位，没有考虑具体表款的材质等因素，一些中档品牌有时候
也会生产复杂手表，而顶级品牌也有基本表款。此分类也不是一成不变的，每过一个时
期由于一些钟表品牌得到极大发展，等级会有浮动。请收藏本页，以便随时了解手表品
牌的最新变化。
世界名表排行 - 特级表
本级别品牌特征：以制作复杂功能表见长，打磨考究，充份显示表厂的技术实力，品牌
含金量极高，产量有... 阅读全帖 |
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a***n
发帖数: 1355 | 19 【 以下文字转载自 WaterWorld 讨论区 】
发信人: zenithmitbbs (zenith), 信区: WaterWorld
标 题: Re: 各位会娶和前男友同居过3,4年的女孩子吗？
发信站: BBS 未名空间站 (Thu Jan 7 19:54:00 2010, 美东)
really jerks, you guys.
能跟男友同居过三四年的至少说明是个对感情很认真的人。 |
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w*******y
发帖数: 60932 | 20 It's the Deal of the Day. Add item to cart to see price.
$579.99
-$86.99 Bing |
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w*******y
发帖数: 60932 | 21 Link:
http://www.sears.com/shc/s/p_10153_12605_05775130000P?vName=Computers & Electronics&cName=Televisions&sName=View All&UnitNumber=&storeOpenDayInd=&prdNo=1&blockNo=1&blockType=L1
$50 Gift Card Rebate is applicable on almost all tvs (but it expires today,
sorry for the late post).
some other tv & their prices
Zenith
42", 768p, $500, plasma
Panasonic
42", 720p, $520, plasma
LG
42", 720p, $540, plasma
LG
37", 1080p, $549, LCD
Panasonic
37", 1080p, $599, LCD
Sony |
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w*******y
发帖数: 60932 | 22 I am sorry if this is a repost, but I could not find anyone else posting on
this.
Dicks Sporting Goods in Woodland Hills, CA is now giving 75% OFF their
already clearance items in the store.
I spoke with one of the workers and he told me that they are closing several
stores NATIONWIDE (so this may be happening elsewhere). They are closing
this store and trying to get rid of any item that was already on clearance,
and any food/beverage items; some other stuff is also on sale, but what
doesn't g... 阅读全帖 |
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w*******y
发帖数: 60932 | 26 Link:
http://www.sears.com/shc/s/p_10153_12605_05775861000P
(5% discount reflected in cart)
Product Overview:
Altitude not to exceed: 9,514 feet / 2,900 meters
Depth: 2 to 5 in.
Features: Energy star qualified
Item Weight (lbs.): 60.6 lbs.
Number of HDMI Inputs: 3
Resolution: 1080p
TV Type: Plasma
Type: Plasma
Feature: 1080p
Resolution: FULL HD - 1080P
Screen Size: 43 to 50 in.
Type: Plasma
Width by Range: 43 to 47 in.
Screen Aspect Ratio: 16:9
Energy:
E... 阅读全帖 |
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b*****e
发帖数: 1264 | 28 http://www.aero-news.net/index.cfm?ContentBlockID=46af9960-f038-42f2-8d68-1ed4cdeed8ca
“The plane, a Zodiac 601XL, is a two-seat kit-built plane manufactured by
the Zenith Aircraft Company of Mexico, MO. In honor of the single-engine
Columbia 400 aircraft called "Inspiration" that Irving flew on last year's
record-setting flight, the XL was dubbed "Inspiration II" by the students”
10周搞定，原来没有设计时间。
58年北航半年之内搞定北京一号。这个可是从设计开始算得。 |
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a**g
发帖数: 57 | 30 zenith说的很对， 找了一个老中的sales manager，可以讲下7-8千，但我的车在上月
买回前发了一次烧（显示ENGINE OVERHEAT）。 只好割爱了。 |
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f*r
发帖数: 3968 | 31 流星观测
作者：Alan MacRobert
特约翻译：北京 寇文
摘自《星光快讯》97年第5期
观看流星很容易，任何人都能在凌晨这段时间到户外，躺在一张躺椅上，等待着偶尔
出现的流星。这只是为了玩一玩，不过如果把你所看到的用科学的方法记录下来，你就可
以参加国际流星组织（IMO）在世界范围内的观测活动了。（本文原来是为11月份的狮子
座流星雨写的，但是你也可以把这里讲的方法用于观测其它流星雨。）
百余年来流星研究一直非常依赖于业余爱好者的观测，取得了许多成就，但也有一个
问题，即观测者的数据不规范。你所能看到的流星数量取决于光污染的程度、流星雨辐射
点的高度、观测视野的大小以及其它因素，这些因素需要尽可能精确测定记录下来，这样
可以对每个人的数据进行修正使得它们可以互相比较。
自从1988年在比利时成立以来，IMO已在世界范围内把以前分散的领域统一起来，爱
好者现在有了一个专业水平的组织，为观测者制订准则，接受他们的数据，对它们归纳分
析并及时出版。衡量流星雨强度的标准是ZHR（zenithal hourly rate)，它是假设当流星
雨辐射点在天顶，肉眼所见极限星等为6.5等时， |
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f*r
发帖数: 3968 | 32 Finally cleared up just before midnight. Looking North over the house
into
Ursa Minor, the sky has a definite low level glow of a kind of aqua
color
with very obvious and large whisps (waves) of light
(white-ish-gray-aqua)
flowing southward reaching near zenith. There are several streamers
extending out of the general northern glow and seem to hold their form
for
long periods. At first I thought these might be clouds, but the way
they
move tells me otherwise.
None of this is extremely well hued |
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a*******r
发帖数: 7558 | 33
我来贡献一个，自己收集整理的，中文名来自陆谷孙的英汉大辞典。
Jan Sky:
Zenith:
Aries 白羊
Taurus 金牛
Gemini 双子
Auriga 御夫
Lynx 天猫
Camelopardalis 鹿豹
North sky
Ursa Major = Big Dipper
Ursa Minor=Little Dipper
Cepheus 仙王 （Andromeda父）
Draco 天龙
Cassiopeia 仙后 （Andromeda母）
Canes Venatici ？？
West sky:
Cetus 鲸鱼
Pisces 双鱼
Pegasus 飞马
Lacerta 蝎虎
Andromeda 仙女
South sky:
Orion 猎户
Monoceros 麒麟
Lepus 天兔
Canis Major 大犬
Columba 天鸽
Eridanus 波江
East sky:
Leo Minor 小狮
Cancer 巨蟹
Canis Minor 小犬
Hydra 长蛇
看见波江座，想起了奥兹玛计划，找找再贴。 |
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e***e
发帖数: 3872 | 34 Fernando Pessoa
Poemas de Alberto Caeiro
O Tejo é mais belo que o rio que corre pela minha aldeia,
Mas o Tejo não é mais belo que o rio que corre pela minha aldeia
Porque o Tejo não é o rio que corre pela minha aldeia.
O Tejo tem grandes navios
E navega nele ainda,
Para aqueles que vêem em tudo o que lá não está,
A memória das naus.
O Tejo desce de Espanha
E o Tejo entra no mar em Portugal.
Toda a gente sabe isso.
Mas poucos sabem qual é... 阅读全帖 |
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e***e
发帖数: 3872 | 35 Fernando Pessoa
Poemas de Alberto Caeiro
O Tejo é mais belo que o rio que corre pela minha aldeia,
Mas o Tejo não é mais belo que o rio que corre pela minha aldeia
Porque o Tejo não é o rio que corre pela minha aldeia.
O Tejo tem grandes navios
E navega nele ainda,
Para aqueles que vêem em tudo o que lá não está,
A memória das naus.
O Tejo desce de Espanha
E o Tejo entra no mar em Portugal.
Toda a gente sabe isso.
Mas poucos sabem qual é... 阅读全帖 |
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