s**********n
发帖数: 2343 | 1 http://www.cars.com/go/advice/Story.jsp?section=top&subject=mor
Driving at night introduces a variety of risks, all related to the fact that
our vision becomes limited. The less well you can see, the less well you
drive. So when someone oncoming cruises past you and shines the equivalent
of a 100,000-candlepower lighthouse directly into your retinas, he's
definitely being more than a little annoying — he's compromising your
ability to drive safely.
If that's not reason enough for you to remember... 阅读全帖 |
|
r******o
发帖数: 1530 | 2 鉴于大家对新XC90一些基本功能讨论都差不多了，我也就不废话了，说几个这次去滑雪
的体会：
1.先说这个被人“诟病”4缸吧，车是装的满满的，三个大人，两个小孩，没用第三排
，头挺三副ski，trunk被填满到爆，吃喝拉撒的带了一大堆，高速上基本75以上在跑，
来回MPG平均20，考虑到满载来回，头顶rack风阻更大，还上山，这个MPG一般吧。说动
力吧，木有不够用的时候，原来以为装太满爬山会跑不动，上ramp会不会速度起不来，
太慢，结果感觉油门还是很轻盈，开过几次dynamic mode，轻点油门也出去了，还有推
背感，comfort mode下，上ramp也没有压力，ecco mode那就是老牛拉车了。
2.这回用了automatic low/high beam和auto bending light把我给爽到了，我知道这
功能很多其他车上也有。这回跑山路限速50，很多弯道上下山，天黑的早，大灯在对面
没车和前方没有灯光时会自动high beam，一下子就明亮了，有车时会自动打回low
beam，会车完再回high beam，转弯的时候车灯一起转向，视线非常好，所以这个thor
li... 阅读全帖 |
|
n***d
发帖数: 3749 | 3 Thanks all the same. Someone asked a list of questions to dismqualify radar
gun:
The subsequent cross examination went like this:
Me: Have you been trained in radar?
Officer: Yes.
Me: Would you please produce a training certificate?
Officer: I don’t have to. (This starts to throw me for a loop. The judge
is silent.)
Me: What is the width of the radar beam?
Officer: I don’t know. I don’t have to know that.
Me: What is the maximum distance of the of the radar beam?
Officer: I don’t need to know th... 阅读全帖 |
|
n***d
发帖数: 3749 | 4 Thanks all the same. Someone asked a list of questions to dismqualify radar
gun:
The subsequent cross examination went like this:
Me: Have you been trained in radar?
Officer: Yes.
Me: Would you please produce a training certificate?
Officer: I don’t have to. (This starts to throw me for a loop. The judge
is silent.)
Me: What is the width of the radar beam?
Officer: I don’t know. I don’t have to know that.
Me: What is the maximum distance of the of the radar beam?
Officer: I don’t need to know th... 阅读全帖 |
|
V*****2
发帖数: 7930 | 5 Perform the following procedure when
replacing the left headlight bulb. Turn
the screws counterclockwise and
remove them and the cover.
Battery duct
Find the high and low beam bulbs in
the rear of the headlight unit.
The outboard bulb is the LOW beam,
and the inboard one is the HIGH beam
High-beam bulb
1. Turn the socket and bulb assembly
counterclockwise, and carefully pull it
backward.
2. Disconnect the socket and bulb
assembly from the electrical connector
by pressing the tab on the connector... 阅读全帖 |
|
b********6
发帖数: 35437 | 6 我最烦那种自己改灯的。对面过来简直亮瞎狗眼
全程开high beam 是可以给罚单的，但是安装不合格灯泡的却没有罚单，这个法规应该
改一下
[在 noles (mileman) 的大作中提到：]
:I replaced my low beams with XenonDepot Extreme HIDs. Super bright. Also
:replaced high beams with XD Extreme LED Pro bulbs. Not as bright as HID but
much better than Halogen bulbs (HID has warm up time and is not suitable
for high beams).
:Strongly suggest you do the same.
:Every halogen headlight is same regardless car type: dim (IIHS rating: poor)
:. |
|
u*l
发帖数: 523 | 7 用手机发帖，不容易编辑，请忽略格式、排版错误。
Supplier Chain Engineer
Introduction
The Supply Chain Engineer develops and maintains the relation with the
supplier, at an operational level, with the purpose to create optimal
engineering and/or manufacturing collaboration between supplier and HMI. He/
she will work closely with supplier and development teams to optimize the
effectiveness and efficiency of new product development. The Supply Chain
Engineer will have the responsibility to assure supplier quality through
... 阅读全帖 |
|
B*****8
发帖数: 57 | 8 很多术语，看不太明白，请教方家，应该怎么和builder 谈？
多谢！
#1170: Where pipe cross the beams the structural integrity of the beam is
resduced the percentage of the crossectional areas of the pipe divided by
the intended crossectional area of the beam. Note crooked tendons.
#1171 The beam bottoms are not flat as shown in the details.
#1172 There is no space between the cable and the plastic. Therefore, when
the tendon is stressed it will cut into the dirt and fail to put
compression in the concrete it should be em |
|
m*c
发帖数: 74 | 9 一个41年的房子，唉，没办法，这地方的房子就都这么老。房检做完了。但是有几个问
题。
1.basement finish了，inspector的report就说没法检查beam啦，structure啦。是真的
么？我的理解是房子的beam,structure最重要了，特别我们很可能以后考虑在二层
extend一个
bedroom，是不是应该现在就看看beam啥的能不能承得住？难道basement finish了就真
的没法
查啦？难道买房子里最重要的部件就只能听天由命啦？
2.白蚁。在一个无法接近的地方，大概5，6米远，inspector指着说木板上有些整齐的
小黑洞，说
那就是放杀白蚁的药。但是不知道是有白蚁还是预防性的。房主也说是没有过白蚁。这
种情况下我们
还有什么办法确认白蚁么？还是只能相信房主的话了？
3.我们很想在去检查一下beam和structure，但是房主以已经做过inspection为由。说
在交
deposit (10%房价）以前不再允许second inspection。是不是我们真的就没办法进行
第二次
房检？但是如果我们交了10%以后，因为理论上已经经过了房... 阅读全帖 |
|
m***y
发帖数: 14763 | 10 Yeah, call a structural engineer. Told them you are concerns with the lally
columns.
Adding/removing a lally columns is not so uncommon. They are used to support
the timber beams. In many cases, when people finish their basements, they
could replace the timer beams with steel I-beams so that the lally columns
are not needed any more. In other cases, they might change the location of
the existing lallies for bigger open space. Of course, in all these cases,
you need a structural engineer/architec... 阅读全帖 |
|
a*********7
发帖数: 30080 | 11 【 以下文字转载自 Music 讨论区 】
发信人: niupitang (牛皮糖), 信区: Music
标 题: 【OCEF你的梦想我的爱】气龙《dream》
发信站: BBS 未名空间站 (Thu Oct 20 23:18:18 2011, 美东)
很喜欢气龙给AMANI填的词 谢谢气龙很慷慨的让我拿来糟蹋
词：气龙
曲：Beyond --《AMANI》
山阻断我们目光
山峰分割天空
山的那边是否能飞翔
路有时太过漫长
有时却又太短
哪一条路带我去远航
我们有微笑的眼睛
我们有稚嫩的翅膀
我们同样也有着那灿烂的梦想 （这句被我篡改了）
我们心里坚信
Oh my dream, Oh your dream, oh our dreams all beam
我们一直坚信
Oh my dream, Oh your dream, oh our dreams all beam
手撑起一方晴空
努力从末放松
风风雨雨我们也从容
汗点滴汇成山泉
浇出山花烂漫
寒冬过后必定是春天
我们有微笑的眼睛
我们有稚嫩的翅膀
我们同样也有着那灿烂的梦想（同上）
我们心里坚信
Oh my dream, Oh ... 阅读全帖 |
|
n*******g
发帖数: 1260 | 12 很喜欢气龙给AMANI填的词 谢谢气龙很慷慨的让我拿来糟蹋
词：气龙
曲：Beyond --《AMANI》
山阻断我们目光
山峰分割天空
山的那边是否能飞翔
路有时太过漫长
有时却又太短
哪一条路带我去远航
我们有微笑的眼睛
我们有稚嫩的翅膀
我们同样也有着那灿烂的梦想 （这句被我篡改了）
我们心里坚信
Oh my dream, Oh your dream, oh our dreams all beam
我们一直坚信
Oh my dream, Oh your dream, oh our dreams all beam
手撑起一方晴空
努力从末放松
风风雨雨我们也从容
汗点滴汇成山泉
浇出山花烂漫
寒冬过后必定是春天
我们有微笑的眼睛
我们有稚嫩的翅膀
我们同样也有着那灿烂的梦想（同上）
我们心里坚信
Oh my dream, Oh your dream, oh our dreams all beam
我们一直坚信
Oh my dream, Oh your dream, oh our dreams all beam |
|
f**s
发帖数: 968 | 13 Specifications
Type
Digital, AF/AE single-lens reflex, camera
Recording Media
CF Cards (Type I); Compatible with UDMA CF cards; SD, SDHC, and SDXC Memory
Cards
Image Format
Approx. 36 mm x 24mm (35mm Full-frame)
Compatible Lenses
Canon EF Lenses (excluding EF-S Lenses)
Lens Mount
Canon EF mount
Image Sensor
Type
High-sensitivity, high-resolution, large single-plate CMOS sensor
Pixels
Effective pixels: Approx. 22.3 megapixels
Total Pixels
Total pixels: 23.4 megapixels
Aspect Ratio
3:2 (Horizontal... 阅读全帖 |
|
j**8
发帖数: 88 | 14 Sorry, my fault.
Twonky beam app works like a web browser. After selecting roku player as
your default device, go to youtube webpage on Twonky beam, find any video
you want to watch, you will see the beg Twonky beam icon on your video,
click the icon and then roku will play your video on your TV. Do you other
browsers or youtube app.
Technically it supports any online video website. tv.sohu.com worked for me.
But it doesn't work with letv.com since letv uses flash and my nexus 7
doesn't support ... 阅读全帖 |
|
H********r
发帖数: 12 | 15 其实有很多办法。比较简捷的也有三个：
1. 用网星
2. 用Twonky Beam
3. 用My Plex
三个我都用过一段时间。对我个人而言，My Plex最适合。
Plex本身是从服务器和本地资源播放做起。它有其他这儿没提到的功能。但使用也相应
更复杂些。近年来网络资源播放日渐受欢迎。就象Twonky 加了 Twonky beam一样。
Plex也针对网络资源加了My Plex。
我这儿把过程简化一下，只针对在网上看中文电视。这种情况下，可以相当简单：
1.不用安装任何服务器。
2.不需有个电脑在ROKU附近，甚至连电脑和ROKU在同一个网络的需求也不要；可以在任
何一个电脑上操作。
3.无需在手机上下载APP，也无需用到手机， 因而不会浪费手机的电，也可以一边看电
视，一边用手机上网（Twonky Beam 需要手机一直传送数据给ROKU，否则看一半电视老
断掉）
4.可以自己根据自己网络速度控制图像质量（网星分免费的标清和收费的超清，每类中
图像质量也是由网主，天线宝宝，定。Chromecast 和手机，DVD机上的APP都采用自动
根据你网速调整图像质量的算法。听起来不错，但... 阅读全帖 |
|
H********r
发帖数: 12 | 16 其实有很多办法。比较简捷的也有三个：
1. 用网星
2. 用Twonky Beam
3. 用My Plex
三个我都用过一段时间。对我个人而言，My Plex最适合。
Plex本身是从服务器和本地资源播放做起。它有其他这儿没提到的功能。但使用也相应
更复杂些。近年来网络资源播放日渐受欢迎。就象Twonky 加了 Twonky beam一样。
Plex也针对网络资源加了My Plex。
我这儿把过程简化一下，只针对在网上看中文电视。这种情况下，可以相当简单：
1.不用安装任何服务器。
2.不需有个电脑在ROKU附近，甚至连电脑和ROKU在同一个网络的需求也不要；可以在任
何一个电脑上操作。
3.无需在手机上下载APP，也无需用到手机， 因而不会浪费手机的电，也可以一边看电
视，一边用手机上网（Twonky Beam 需要手机一直传送数据给ROKU，否则看一半电视老
断掉）
4.可以自己根据自己网络速度控制图像质量（网星分免费的标清和收费的超清，每类中
图像质量也是由网主，天线宝宝，定。Chromecast 和手机，DVD机上的APP都采用自动
根据你网速调整图像质量的算法。听起来不错，但... 阅读全帖 |
|
c****t
发帖数: 19049 | 17 HALF-LIVES
the first luisa rey
mystery
I
Rufus Sixsmith leans over the balcony and estimates his body’s velocity
when it hits the
sidewalk and lays his dilemmas to rest. A telephone rings in the unlit room.
Sixsmith dares not
answer. Disco music booms from the next apartment, where a party is in full
swing, and
Sixsmith feels older than his sixty-six years. Smog obscures the stars, but
north and south
along the coastal strip, Buenas Yerbas’s billion lights simmer. West, the
Pacific eternity East... 阅读全帖 |
|
l*****a
发帖数: 38403 | 18 From at least the time of Eusebius (c. 275 – 339 AD) to the present day,
the search for the physical remains of Noah's Ark has held a fascination for
many people. Despite many expeditions, no scientific evidence of the ark
has been found.
http://en.wikipedia.org/wiki/Searches_for_Noah's_Ark
现代寻舟记，越来越精彩
In 1949
Aaron J. Smith, dean of the People's Bible College in Greensboro, NC, led an
unsuccessful expedition to locate the ark.
in the 1980s
Former astronaut James Irwin led two expeditions to Ara... 阅读全帖 |
|
s*****n
发帖数: 536 | 19 roughly speaking, it's like this:
suppose I have 3 beams:red blue and yellow.
I use each beam transfer 1 channnel of signal,
for example, 10Gbit/s. Then I input all the
three beams into one fiber, then the system can
be upgraded from previous single channel system
of 10GB/S to 30GB/S.--This is WDM.
If I insert a lot of beams, each of which has different
color ( freq.), into one fiber, then It's DWDM. For example,
100 different colors, each color transmit 10Gbit/s,
then you can transmit 1TB/s ove |
|
G********e
发帖数: 258 | 20 I am not sure if you guys are familar with the analysis of
elastic-plastic-hinge method. Let me straight myself here:
My problem is to simulate the stiffness of the beam section after its first
yield in a ductile beam due to the expansion of the plasticity in the section
vertically.
My concern is to get the explicit form of the soften stiffness of the beam
given a cross-section under the influence of the plasticity expansion
sectional wide, neglecting the expansion in the beam longitudinally.
T |
|
m******l
发帖数: 613 | 21 我在用java写一格东东，有个算法不会写，只找到了别人用c写的代码
但转换的时候发现如下问题，想烦请各位高手指点一二
int* beam,*scp,*tmx;都是当数组用（我在java中定义了int beamidx, scpidx, tmxidx
）
1.beam += y + icm[y].offset;(icm是我自己定义的一个istate数组，offset是一个整型
元素)
2. *scp=*beam+*tmx;
3.trace类的构造，我构造tracestack开始的时候用如下代码
trace[] list=new trace[10];
然后再在tracestack的构造函数中写道：
for(int i=0; i<10; i++) list[i]=new trace();
但这样每次都会报错java.lang.stackoverflow,后来只好把这一句屏蔽掉
4。int[][][] amx
beam=amx[diff][0]+y+icm[y].offset; 这句话什么意思，怎么转换
trace定义如下
class trace {
public int emitl=0; |
|
w***o
发帖数: 1411 | 22 I created a simple staad model for a continous two span beam with uniform
stiffness. Theoretically, changing the beam stiffnes should not affect the
support reactions, since the beam relative stiffness does not change. But
stadd gives different reactions for different beam stiffness. This can not
be correct. What's wrong with stadd here?
Thanks.
This is the code:
STAAD PLANE
START JOB INFORMATION
ENGINEER DATE 29-Jul-10
END JOB INFORMATION
INPUT WIDTH 79
UNIT FEET KIP
JOINT COORDINATES
1 0 0 0; |
|
g***i
发帖数: 795 | 23 I remember the alignment is determined by your e-beam system's laser
interferometer system's accuracy and your calibration. e-beam litho resolution is
determined by how well you focus the beam(a bit similar as how you focus your SEM), photoresist(type, thickness and bake condition）, beam dose/energy, type of electron emission gun and focus system. The detailed operation procedure is varied from different vendors. |
|
z**********n
发帖数: 39 | 24 3x
TEM00 is fundamental transverse mode of the laser resonator and has the same
form as a Gaussian beam.
Also, I know that diffraction causes light waves to spread transversely as
they
propagate, and it is therefore impossible to have a perfectly collimated
beam. The spreading of a laser beam is in precise accord with the
predictions of pure diffraction theory;
My question is :
why there is a beam waist without passing through any optics, for example,
objective?
Or my understanding is wrong, the |
|
m********r
发帖数: 811 | 25 Minimum Opening Angle
Consider a particle beam of emittance (=phase space area occupied by the
beam) 4.8 mm*mrad. In a collider, this beam is compressed to a half-width of
44 micrometers. What is the minimum opening angle (half-divergence) in
degrees of the beam at the collision point? |
|
m********r
发帖数: 811 | 26 Minimum Opening Angle
Consider a particle beam of emittance (=phase space area occupied by the
beam) 4.8 mm*mrad. In a collider, this beam is compressed to a half-width of
44 micrometers. What is the minimum opening angle (half-divergence) in
degrees of the beam at the collision point?
The minimum opening angle is achieved using rectangular phase space |
|
l*b
发帖数: 4369 | 27 我倒觉得，在Michelson实验里，如果假定半反半透镜无限薄，而且两束光都恰好在
waist上和这个beam splitter相交并被合并，且合并时相对相位差为0，则合并后的光
束是有可能是一束严格的高斯光束的。试想，既然一束光可以被beam splitter（用幺
正矩阵S表示）分成两束，那必然存在某个设备，其变换矩阵为S+（S的厄米共轭），可
以把这两束光再合并为原来那束入射光。
问题在于，在遇到这个beam splitter的时候，对于任意一个beam，如果入射的电场强
度为E，则两个exit port的电场强度均为E/sqrt(2)。在相干叠加的exit port，电场强
度就是2*E/sqrt(2)=sqrt(2)*E，光强正比于2E^2，恰恰是两束入射光能量之和。
擦，n年前年本科的时候觉得仿佛天书的东西，现在竟然也慢慢明白了…… |
|
c*******x
发帖数: 7 | 28 In Bmsplitter implementation, ports 1,2 are input, ports 3,4 are output.
1, 2 beams can be completely combined so 两束激光完全相干.
However, Bmsplitter does NOT allow to set arbitary values for Xs,and Ys.
if 1->3 amp efficiency is r, then 2-> 4 must also be r,and 2->3 = 1->4=t,
and t^2+r^2=1.
You never generate additional power.
You can NOT find a real power implementation to allow you to do (1+1)^2=4>2.
This mathmatical imagination is disconnected from real physics.
However, you can amplify your peak b... 阅读全帖 |
|
s**********8
发帖数: 25265 | 29 Sterilization (microbiology)
http://en.wikipedia.org/wiki/Sterilization_(microbiology)
From Wikipedia, the free encyclopediaJump to: navigation, search This
article has multiple issues. Please help improve it or discuss these issues
on the talk page.
It may need reorganization to meet Wikipedia's quality standards. Tagged
since March 2008.
It is in need of attention from an expert on the subject. WikiProject
Microbiology may be able to help recruit one. Tagged since December 2010.
Contents [hide... 阅读全帖 |
|
a*********7
发帖数: 30080 | 30 【 以下文字转载自 Music 讨论区 】
发信人: niupitang (牛皮糖), 信区: Music
标 题: 【OCEF你的梦想我的爱】气龙《dream》
发信站: BBS 未名空间站 (Thu Oct 20 23:18:18 2011, 美东)
很喜欢气龙给AMANI填的词 谢谢气龙很慷慨的让我拿来糟蹋
词：气龙
曲：Beyond --《AMANI》
山阻断我们目光
山峰分割天空
山的那边是否能飞翔
路有时太过漫长
有时却又太短
哪一条路带我去远航
我们有微笑的眼睛
我们有稚嫩的翅膀
我们同样也有着那灿烂的梦想 （这句被我篡改了）
我们心里坚信
Oh my dream, Oh your dream, oh our dreams all beam
我们一直坚信
Oh my dream, Oh your dream, oh our dreams all beam
手撑起一方晴空
努力从末放松
风风雨雨我们也从容
汗点滴汇成山泉
浇出山花烂漫
寒冬过后必定是春天
我们有微笑的眼睛
我们有稚嫩的翅膀
我们同样也有着那灿烂的梦想（同上）
我们心里坚信
Oh my dream, Oh ... 阅读全帖 |
|
f****n
发帖数: 47 | 31 高速上就可以开high beam?我以为high beam是无论在什么时候都不能开的，除非在伸
手不见五指的山间小道上，汗。。。碰到晚上高速上开high beam而且一直跟在我后面
的人，一般我都是先减速，开到他后面，然后用high beam照他...我发觉我素质好差 |
|
i***s
发帖数: 39120 | 32 京时间4月11日早间消息，SpaceX周五下午成功发射了计划飞往国际空间站的“猎鹰9号”火箭。美国东部时间周日7:23(北京时间周日19:23)，国际空间站的宇航员收到了“猎鹰9号”送来的补给。这是自去年6月上一次补给任务失败后，SpaceX首次成功完成飞往国际空间站的任务。
“猎鹰9号”火箭此次搭载了“龙”飞船，并运送了重约7000磅(约合3175千克)的补给。其中，约3000磅(约合1361千克)为“Bigelow扩展活动模块”(BEAM)，这将为国际空间站提供565立方英尺(约合16立方米)的活动空间。在到达国际空间站之后，BEAM将连接至国际空间站的Tranquility节点，并在未来4个月内进行安装。BEAM计划在国际空间站停留2年时间，帮助工程师收集这一模块在太空环境中使用的数据。
“龙”飞船还携带了一系列其他科学实验材料，例如一堆卷心菜。国际空间站宇航员将种植并食用这些卷心菜。乘员舱还携带了20只活体小鼠，这些小鼠来自制药公司Eli Lilly。这将帮助研究人员更好地了解肌肉萎缩机制。在太空环境下，肌肉会比正常环境更快地萎缩。此外，一个由学生设计的试验将测试一种方法，找出... 阅读全帖 |
|
c**i
发帖数: 6973 | 33 (1) Beam It Up | Energy: Laser beams can deliver energy to machines
through thin air. This might be a good way to power drone aircraft or a
space elevator. Economist, Mar 10, 2011.
http://www.economist.com/node/18304136?story_id=18304136
("The laser, aimed from the ground at photovoltaic cells mounted on the [
drone] Pelican’s underside, charged the chopper’s battery")
Note: The article states, "LaserMotive, the Seattle company that designed
the Pelican’s laser system, won $900,000 by powering... 阅读全帖 |
|
c**i
发帖数: 6973 | 34 William Lawther, US Laser Could Fend off PRC Boats. Taipei Times, Apr 16,
2011 (available now).
http://www.taipeitimes.com/News/taiwan
/archives/2011/04/16/2003500888
Quote:
"Just three months ago, the US Office of Naval Research issued a statement
saying that scientists at Los Alamos National Laboratory, New Mexico, had
perfected a way to generate megawatt laser beams. When developed into a
weapon, these beams could shoot down large numbers of incoming missiles at
low cost and long before they ... 阅读全帖 |
|
h*****9
发帖数: 6643 | 35 我曾经在一个做 Ion-Beam的公司做过三年的自控软件工作。 那个公司就是在搞登月的
时候开始的，这 Ion-Beam 技术其实是作为登月中的某关键一环的技术，我本人不是学
物理对 ION-Beam也不懂，但听那 CTO作过报告，说是这技术可用到航天登月上，但最
后其实没用上。 奇怪的是，那个破公司自六十年代以来就存在，每年可从国家拿到些
Funding， 理由是美国不想放弃这种技术，但也就够着过活，直到上世纪九十年代，
IBM的某部门对这技术有兴趣， 才有机会扩大规模。
从那个公司的经历来看，我真怀疑登月的真实性，而且美国其实没有完全放弃对登月的
探索。 |
|
T****M
发帖数: 1913 | 36 ☆─────────────────────────────────────☆
chairmanmeow (chairmanmeow) 于 (Sun Jul 17 20:00:31 2011, 美东) 提到:
为什么？什么原理？
就这一帮人也不相信拉登死了，后来还是基地组织出来打脸啊
☆─────────────────────────────────────☆
tigereatmeat (小胖子他爹) 于 (Sun Jul 17 20:01:52 2011, 美东) 提到:
可能是智力水平
☆─────────────────────────────────────☆
captain2 (游山玩水走天下) 于 (Sun Jul 17 20:04:08 2011, 美东) 提到:
有照片和录像都不行，得亲身体验才行，LOL
☆─────────────────────────────────────☆
Revolution (毛泽东思想万岁) 于 (Sun Jul 17 20:04:24 2011, 美东) 提到:
没想到经历那么大规模的辩证，... 阅读全帖 |
|
u***r
发帖数: 4825 | 37 http://www.nytimes.com/2015/01/29/us/charles-h-townes-physicist
Charles H. Townes, a visionary physicist whose research led to the
development of the laser, making it possible to play CDs, scan prices at the
supermarket, measure time precisely, survey planets and galaxies and even
witness the birth of stars, died on Tuesday in Oakland, Calif. He was 99.
His daughter Linda Rosenwein confirmed his death.
In 1964, Dr. Townes and two Russians shared the Nobel Prize in Physics for
their work on micro... 阅读全帖 |
|
r*s
发帖数: 2555 | 38 Brendt Christensen
Brendt Christensen
PhD Candidate at University of Illinois at Urbana-Champaign
Champaign, IllinoisResearch
Current
University of Illinois at Urbana-Champaign
Previous
University of Wisconsin-Madison
Education
University of Illinois at Urbana-Champaign
14
connections
View Brendt’s full profile. It's free!
Your colleagues, classmates, and 500 million other professionals are on
LinkedIn.
View Brendt’s Full Profile
Summary
I am a PhD candidate in experimental condensed ma... 阅读全帖 |
|
|
发帖数: 1 | 40 The Poor Quality of American Houses
Updated on April 5, 2019
One striking aspect of houses in America is the flimsy quality of even the
most expensive ones. Houses are built literally like a house of cards. Weak
beams, plywood, flimsy insulation, flimsy siding and roofing that either
blows off in high winds or just rots away after a few years. Its really no
wonder that come tornado or hurricane and houses are literally ripped off of
their foundations and tossed into the air.
In contrast, houses ... 阅读全帖 |
|
t******i
发帖数: 215 | 41 光斑大小的计算见：
http://en.wikipedia.org/wiki/Rayleigh_length
we basically need a collimated laser beam, whose Rayleigh range (zR) is
300km/2 = 150km. assuming wavelength = 1um, then beam radius at waist (w0)
is about 0.2-0.3 m. So at target, the beam radius cannot be larger than 0.5
m. 就是说直径是小于1m的。
以上如有错误请指正。
1m |
|
发帖数: 1 | 42 女孩掉进树洞神游天国的奇迹(视频)
发表时间： 2017-10-26 15:01:27作者：张小清
https://youtu.be/_iZWhsb-PjU
女孩掉进树洞“上天堂”，苏醒后致命肠胃病自愈。（视频截图）
美国德州一个9岁女孩患有两种相当致命的消化道疾病，然而在一次危及生命的坠树事
件后，她的顽疾却不治自好。她的母亲坚信，这要归功于女儿在丧失意识后神游了一趟
天国；医生们认为，她的案例佐证了心灵对健康的影响。
2011年12月，安娜贝尔（Annabel Beam）与两个姊姊阿比盖尔（Abigail）和阿德琳（
Adelynn）在家门外玩耍，她攀上了一棵棉白杨（三角叶杨），没想到树是空心的，她
一失足掉进了树洞里，下坠了30英尺（约9米）。消防人员花了6个小时才成功把她救出。
不可思议的是，她只受了点轻微脑震荡，有一些很轻的磕伤和瘀伤。急救医生告诉吃惊
不已的父母：“我猜上面有谁在看护着她。”
更令人难以置信的是，在这一摔之后，体检显示，安娜贝尔早已确诊的严重肠道疾病─
─假性肠梗阻和胃窦动力不足症全都无影无踪了。
虽然小安娜贝尔当时只有9岁，但从5岁开始已做了多次手术，她的... 阅读全帖 |
|
S*********g
发帖数: 24893 | 43 【 以下文字转载自 Stock 讨论区 】
发信人: StephenKing (金博士), 信区: Stock
标 题: 向民族英雄包鹏程致敬！为民族英雄包鹏程欢呼！
发信站: BBS 未名空间站 (Wed Jun 3 20:54:21 2015, 美东)
Pengcheng Bao, Graduate Student
Pengcheng is a second year graduate student. He obtained his B.S. in physics
from Nankai Univeristy in China.
Project: Development of methodology for realistic modeling of heterogeneous
catalytic interfaces.
Tel: 310-206-3215
Email: [email protected]
/* */
PENGCHENG BAO
Education
and Awards
2009 –
NANKAI UNIVERSITY TIANJIN, CHINA... 阅读全帖 |
|
d********l
发帖数: 161 | 44 开了1000mile. 感觉还不错。handling很好。在高速上用sport
mode, 侧倾小，方向指向准确。V8动力充沛，声音很独特。路感清
晰，方向指向性良好，转弯换道感觉都还不错。越野能力对我来说已经
是Overkill了。还没有试过。
remote start非常好用。冬天自动开方向盘，后窗，倒视镜和座椅加
热。
auto dimming high beam也不错。高速上我就一直开着High
beam, 有车的时候自动会跳到Low beam。高低光都是氙气大灯，很
亮。 |
|
r*******1
发帖数: 1183 | 45 谢谢楼上众大虾.我打到high beam了.现在调回来了.
很惭愧,开了很久车了,居然连high beam low beam 都搞不清楚.掩面..... |
|
L*A
发帖数: 756 | 46 Model Front Rear
Odyssey MacPherson Multi-Link double wishbone
Mazda5 MacPherson Multi-Link
Sienna MacPherson Twist beam
Routan MacPherson Twist beam
Caravan MacPherson Twist beam |
|
m****4
发帖数: 827 | 47 左边的前后灯都有问题好像
首先，已经有好一阵子是"hyperflash"，就是打左方向灯时闪得特别快（比右边的正常速度快很多），上网查了好像要装一个什么load resistor才行。。
然后前左灯是low beam没有，要高亮才有，所以正常开车时没有亮
后左灯有low beam（正常开车时亮），但刹车跟打方向时不亮。
我的问题是，是灯泡的问题吗？（不知道车的灯泡是不是高亮跟low beam是分开的？）
还是线路有问题？
谢谢了，非常confused现在，最起码要把左边后面的方向灯搞回来，不然开车变向时有点危险。 |
|
m****4
发帖数: 827 | 48 另外我也蛮confused的是，一直以为前面的灯就是灯泡坏了不亮，结果今天测试了一下
开大灯（high beam），反而亮得好好的。难道真的high beam跟low beam线路上完全分
开的？ |
|
