c******k
发帖数: 1140 | 1 如果从波长上区分，正chirped的脉冲， 就是红光波长分量跑在前面。负chirped，红
光分
量落在尾部。
用这种脉冲场图的表示的pulse，是正chirped还是负chirped的脉冲？自己认为是正
chirped的，因为频率分量随时间在增加。但是正chirped的脉冲， 就是红光波长分量
在前面，它的频率因改是低的，这里确实是高的，有些迷惑？多谢指导 |
|
v**n
发帖数: 57 | 2 昨天中午去日常做service的dealership那里换完driving belt，晚上开始就发出chirp
chirp的尖利声音，时有时无，开着风扇时出声可能性更大。请高人指点是怎么回事？ |
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b***m
发帖数: 891 | 3 不知道怎么测量chirp，请版上的大虾指点一下。另外，比如已经有了色散代价的数据
，是不是可以计算出chirp？
或者，有没有可以推荐的paper读一下？谢谢！ |
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h*********u
发帖数: 65 | 4 The important thing here is blue is ahead or after the red. Sometimes people
use negative or positive chirp in an opposite way. |
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H********n
发帖数: 207 | 5 别自己把自己搞糊涂了。
先弄明白这个时间轴是怎么定义的。如果负的时间是“以前”，那你就是先看到红，是
正chirp. |
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G***G
发帖数: 16778 | 6 Hi Guys,
Why a smoke detector keeps chirping?
how to get this fixed?
have you encountered this? |
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G***G
发帖数: 16778 | 7 but I just removed the battery. It still keeps chirping. |
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u*l
发帖数: 523 | 8 applied optics, chirped fiber grating, intensity demodulation
背景合适的联系我。 |
|
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KV
发帖数: 5728 | 10 我是专家，偶尔还是会来鱼版看看，此类器材问题，以后我没答复的时候，你可以自己
顶一下，我一两个月一定会来看看，有技术性的器材问题，我一定会答复。
装在船上用的探鱼器，最主要的功能是需要如何准确还原捕捉到的声纳信号，目前比较
高级一点的声纳，已经到了多频道广谱chirp声纳，声纳的发展超过目前fish finder的
发展，Sounder解析声纳信号，各公司差太远了，尤其是Chirp声纳信号。
首先你需要告诉我你父亲钓鱼的水深是多少，一般来说，300尺以内的水深，建议使用H
高频信号，300~600尺水深，建议使用M中频信号，超过600~10000尺，建议使用L低频信
号。
其次，你父亲的船如果是25尺以上，性价比比较高的是Airmar B175的各系列，如果是
25尺以下，选择普通Chirp声纳。
第三，才是选择与之相配的fish finder，实际上是Sounder还原信号，输入到多功能显
示器上，对信号的解析，尤其是chirp信号，目前做的最好的是新款Garmin 86xx系列，
内置双频道chirp声纳sounder，能准确还原收到的声纳信号。
做的最差的是Simrad，信号解析... 阅读全帖 |
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h*******3
发帖数: 3775 | 11
刚刚去advance auto parts 网上看那个camshaft，
有个人的经历和我的很相似：
“I had a chirp that sounded like the belt.After replacing the belt and the
tensioner the chirp was still there.It sounded exactly like a bad belt or
pulley.I did some research and decided to try this part.It solved the issue
and when I pulled it and spun the shaft it made the chirping noise
intermittenly.I checked the play in the shaft and it was barely noticable
compared to the play in the new one but it was having an effect on
performance.The... 阅读全帖 |
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l****z
发帖数: 29846 | 12 What’s Your Plan?
By Mark Steyn
April 14, 2012 4:00 A.M.
In the end, free societies get the governments they deserve. So, if the
American people wish to choose their chief executive on the basis of the “
war on women,” the Republican theocrats’ confiscation of your
contraceptives, or whatever other mangy and emaciated rabbit the Great
Magician produces from his threadbare topper, they are free to do so, and
they will live with the consequences. This week’s bit of ham-handed
misdirection was “the... 阅读全帖 |
|
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m****s
发帖数: 8992 | 14 i doubt it.
because the little bird tells me otherwise.
chirp chirp chirp |
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KV
发帖数: 5728 | 15 十几年前，一帮在长岛读书工作的年轻人，因为爱好surf casting，创造了长岛钓鱼学
院，这个学院集中了很多美国东北岸华人钓鱼的牛人大佬，连3k也曾和poof一起来过，
十几年来，我们对surf fishing的热爱一如既往。
（学院领导striper，一个美国人拍下来发在SOL上）
很多年前的某个秋季的夜晚，梦涛客Royal Atlantic，在老鲨鱼的房间里，谈人生谈理
想看海浪滚滚听秋风呼啸煮酒论英雄，如今很多学院的成员为事业穿梭在中美两国之间
，但钓鱼的梦想，未曾因此而淡忘。
今天，学院的船队，终于第一次开到了118迈的Hudson Canyon，也是从今天开始，长岛
钓鱼学院的金枪鱼fishing，将正式拉开序幕。
周四，副院长认为应该安排两条船同时前往大峡谷，毕竟非常远，钓点通常在West
Wall以东，副院长认为应该是两条游艇同时前往，但由于本周他们已经有钓鱼安排，所
以副院长希望能延后，另外目前季节还早，水温还冷，大西洋暖流还没有进入hudson
canyon。我是等不及了，从三月底开始的电子装备更新，一直到现在dealer还没有完全
完工，而钓鱼季节已经开始两个月... 阅读全帖 |
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KV
发帖数: 5728 | 16 十几年前，一帮在长岛读书工作的年轻人，因为爱好surf casting，创造了长岛钓鱼学
院，这个学院集中了很多美国东北岸华人钓鱼的牛人大佬，连3k也曾和poof一起来过，
十几年来，我们对surf fishing的热爱一如既往。
（学院领导striper，一个美国人拍下来发在SOL上）
很多年前的某个秋季的夜晚，梦涛客Royal Atlantic，在老鲨鱼的房间里，谈人生谈理
想看海浪滚滚听秋风呼啸煮酒论英雄，如今很多学院的成员为事业穿梭在中美两国之间
，但钓鱼的梦想，未曾因此而淡忘。
今天，学院的船队，终于第一次开到了118迈的Hudson Canyon，也是从今天开始，长岛
钓鱼学院的金枪鱼fishing，将正式拉开序幕。
周四，副院长认为应该安排两条船同时前往大峡谷，毕竟非常远，钓点通常在West
Wall以东，副院长认为应该是两条游艇同时前往，但由于本周他们已经有钓鱼安排，所
以副院长希望能延后，另外目前季节还早，水温还冷，大西洋暖流还没有进入hudson
canyon。我是等不及了，从三月底开始的电子装备更新，一直到现在dealer还没有完全
完工，而钓鱼季节已经开始两个月... 阅读全帖 |
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l*h
发帖数: 4124 | 17 Google 为重返中国不择手段
小将
今天早晨上Google，发现谷歌已经更名了，新的名字叫Topeka。这个名字是和堪萨斯州
的Topeka对调的。因为这个小城一直希望改名 Google。
我猜换个名字，是要重返中国市场，因为“谷歌”已经被全面封杀，据说谷歌CEO失去
中国市场后，痛苦万状，天天在家揪头发，已经变成了秃顶。很多员工已经无事可做，
已经开始在研发一种动物语言的翻译器，主攻美国的宠物市场。我刚下载了其测试版，
真是很灵的，我将电脑对着我家的鹦鹉，结果发现两只鸟儿在夫妻对唱，“树上的鸟儿
成双对。”可惜只免费试用一次，后来再试，就是chirp chirp chirp...
谷歌中国的员工建议改名，因为中国人爱面子，改个名字，换个身份再来会不一一样。
这就好比王小二已经进不了北京户口，后来去了美国，更名为Sean Wang，作为归国华
侨才办到了北京居住证一样。这个曲线救国的方案得到了谷歌上下的一致赞同。
Topeka是大部分中国人不知道的一个地名。新华社编的《美国地名译名手册》上都没有
收入，可见这是纯粹浑水摸鱼，试图借壳上市。再次回到中国之后，中文译名怎么办？
还叫不叫 |
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p******e
发帖数: 17163 | 18 68 deg f. 13% humidity
went out for a walk, then climb a tree, a short one, of course, then lying
on a branch trying to have my zen moment. but then i saw a dirty bag on top
of the tree, blocking my view to the nice bright sky with light cloud.. well
, then i close my eyes counting 1 thru 100, then I open my eyes, the sky got
brighter, cloud thinner, still couldnt get my zen moment tho.
so I got down from the tree, walk to a river shore nearby, then lay my head
low.... and a thought just popped ... 阅读全帖 |
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p******e
发帖数: 17163 | 19 68 deg f. 13% humidity
went out for a walk, then climb a tree, a short one, of course, then lying
on a branch trying to have my zen moment. but then i saw a dirty bag on top
of the tree, blocking my view to the nice bright sky with light cloud.. well
, then i close my eyes counting 1 thru 100, then I open my eyes, the sky got
brighter, cloud thinner, still couldnt get my zen moment tho.
so I got down from the tree, walk to a river shore nearby, then lay my head
low.... and a thought just popped ... 阅读全帖 |
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b*********t
发帖数: 256 | 20 Not properly installed. Bring back and they know how to fix.
The squeezing noise usually occur during cold starup, like in the morning or
at night. the noise is typically gone after warm up. |
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v**n
发帖数: 57 | 21 多谢多谢。希望不要再charge extra
or |
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c*u
发帖数: 916 | 22 我需要一个cutoff freq 随时间变化的LPF。可以这么理解，我要在一堆chirp里面
把chirp比较快的信号给过滤掉。 |
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m****n
发帖数: 68 | 23 这个讨论好呀， 其实siegmann 的书的chapter9 写的很好， 只有没有chirp的pulse才
是transform limited， short pulse after fiber is highly chirped but the
spectrum should not change unless bandwidth limited or non linear effect for example self phase modulation etc. That can be easely acumulated by fs pulse in fiber. |
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r******l
发帖数: 121 | 24 If you do not care about chirp, I agree with Bingxiang that just a section
of normal fiber is enough.
If you do care about chirp, you can use a narrow-passband filter, such as
fiber grating. |
|
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b*****n
发帖数: 760 | 26 agree.
most important is to identify whether blue or red travel faster?
people |
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c******k
发帖数: 1140 | 27 是的，有的书就是这种理解。负的时间是“以前”，所以先看到红分量。请参考附图 |
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o*o
发帖数: 4495 | 28 微波没学过
雷达的还真学过点
数学很一般般
现在就记得什么chirp signal了 |
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z**********e
发帖数: 22064 | 29 习近平的文艺 - 纽约时报中文网 国际纵览
The Art of Xi Jinping
By MURONG XUECUN November 24, 2014
习近平的文艺
慕容雪村 2014年11月24日
HONG KONG — Last month, President Xi Jinping of China addressed a forum of
prominent artists and writers in Beijing to enlighten us with his views on
the arts. In a
talk liberally seasoned with cultural allusions, Mr. Xi made a show of his
literary
knowledge and explained how he sees the role of art in today’s China.
香港——上个月，北京召开了一次文艺座谈会，参会的有许多著名作家和艺术家，习近
平在
会上做了一次讲话，说了一些名言警句，背诵了自己读过的书目，并且表达了他对... 阅读全帖 |
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r******g
发帖数: 691 | 30 多伦多交响乐团决定取消俄裔乌克兰钢琴家Valentina Lisitsa 这个周末在多伦多演奏
拉赫马尼诺夫的第二钢琴协奏曲。
原因： Valentina Lisitsa 最近在脸书和推特上发表了同情东乌克兰的言论。
言论自由，在西方就是只准发表支持西方意识形态的言论的自由。
以下是Valentina Lisitsa 的最新情况
Dear fans, DEAR FRIENDS!
I have a confession to make and a huge favor to ask all of you. I really
REALLY need your help now.
But first, my confession.
Over the last year I have been leading a double life. There was me - a "
celebrity" pianist hopping from a concert to a concert, all over the world;
learning new pieces, meeting fans,... 阅读全帖 |
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b**e
发帖数: 3199 | 31 google一下就知道了
引力辐射會使在旋近态中的双星损失动能，造成其轨道以很缓慢的速度发生衰减，两颗
恒星逐渐接近。换句话说，它们发生引力辐射的时间尺度远大于其公转周期，因此这一
过程被认为是绝热的，最常用的预测波形的方法是后牛顿近似方法[29]。从引力波的频
率估算方法可知，双星系统的辐射频率与其自身密度的平方根成正比关系。地面探测器
可探测的双星包括中子星和恒星质量黑洞，LISA则负责探测白矮星等未知双星和超大质
量黑洞
轨道运动辐射的能量会造成轨道的收缩，其结果是观测到发射的引力波频率随时间增长
，这种波叫做啁啾（chirp）信号。如果能够观测到啁啾的时间尺度，就可以推算出双
星的啁啾质量[註 2]；进而可以从啁啾质量和观测到的引力波振幅推算出双星到地球的
距离，这意味着将有可能进一步藉此测量哈勃常数和其他宇宙学常数[30]。
根据探测信号，这束引力波来自位于南天的两个黑洞碰撞合并，两个黑洞的质量分别大
约为29和36倍太阳质量，距离地球大约13亿光年。在这次黑洞碰撞中，大约有3个太阳
质量的物质在不到1秒的时间内转化成引力波的能量，其峰值功率达到了全宇宙的所有
可见光功率的5... 阅读全帖 |
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c*********d
发帖数: 9770 | 32 The Art of Xi Jinping
By MURONG XUECUN November 24, 2014
习近平的文艺
慕容雪村 2014年11月24日
HONG KONG — Last month, President Xi Jinping of China addressed
a forum of
prominent artists and writers in Beijing to enlighten us with his
views on the arts. In a
talk liberally seasoned with cultural allusions, Mr. Xi made a
show of his literary
knowledge and explained how he sees the role of art in today’s
China.
香港——上个月，北京召开了一次文艺座谈会，参会的有许多著名作家和艺术... 阅读全帖 |
|
W*****B
发帖数: 4796 | 33 是一个什么腺体里喷射出来的。问题是怎么可能会喷射这么大量呢？
This Is What Comes Out When a Woman Ejaculates
Everything you want to know about the elusive squirt.
It was, and remains, one of the most spectacular things I’d ever witnessed.
A dozen women, my then-partner among them, shooting arcs of liquid the air
from from their genitals for the very first time, in unison. What had begun
90 minutes earlier as a fairly granular anatomy lesson in a Brooklyn
townhouse had seamlessly morphed into something resembling the fountain ... 阅读全帖 |
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s*****V
发帖数: 21731 | 34 估计这人水平一般，这个chirped pulse laser虽然没有得诺将，但是业界早就已经是
应用广泛，做出这个贡献，如果有中等的水平，都应该已经chair professor。 |
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v*****s
发帖数: 20290 | 35 强激光麻烦大了。
非线性效应全来了。自聚焦，热克尔效应，chirp什么的统统往上加，起阵凉风，激光
就不知道飘哪儿去了。 |
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l****z
发帖数: 29846 | 36 by n*****[email protected] (The blogprof)
The community organizer-in-chief even has to tell the absolutely silent
crowd that he just told a joke. Ouch:
If this had happened to Sarah Palin, the predictable media narrative that
she's too dumb to tel a joke correctly would ensue. Related via Instapundit:
President Obama Receiving Sycophantic Laughter.
While President Obama certainly has an above-average sense of humor for
a politician — easy-going, self-effacing, maybe a little corny at times —
he'... 阅读全帖 |
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l****z
发帖数: 29846 | 37 I can’t wait to see what those courageous atheists come up with for Ramadan.
Christmas in America is a season of time-honored traditions — the sacred
performance of the annual ACLU lawsuit over the presence of an
insufficiently secular “holiday” tree; the ritual provocations of the
atheist displays licensed by pitifully appeasing municipalities to sit
between the menorah and the giant Frosty the Snowman; the familiar strains
of every hack columnist’s “war on Christmas” column rolling off the
key... 阅读全帖 |
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l****z
发帖数: 29846 | 38 by Peter Ferrara
Day 2 of the government shutdown, and look out the window. The sun is still
shining, and the sky is still blue. The birds are chirping.
The Great Government Shutdown is not that big a deal, even for the
government. The federal civilian workforce includes 2.9 million bureaucrats.
Out of that, only 800,000 are being furloughed, or just 27%. Even for these
workers, the shutdown just amounts to a paid vacation for a few days.
Just like the overballyhood sequester, average Americans ... 阅读全帖 |
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l****z
发帖数: 29846 | 39 by Dan Riehl 10 Sep 2014, 5:51 PM PDT 28
The White House may call it a recovery, and the media may mostly chirp along
, but that doesn't appear to be the case for many Americans still victim to
ObamaNomics. The "number and share of people out of work for more than six
months, the so-called long-term unemployed, remain at historically high
levels."
One has to wonder how hiring trends might be different were businesses
not having to contend with the new financial burdens imposed by Obamacare,
... 阅读全帖 |
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H**U
发帖数: 1814 | 40 有没有人fact check一下他的FACT
I did not watch the convention. I don’t think that’s a surprise. I’ve got
a lot of stuff to do and — and they are pretty long events. But I did read
some of what was said, and the one thing that I think is important to
recognize is this idea that America is somehow on the verge of collapse,
this vision of violence and chaos everywhere, doesn’t really jibe with the
experience of most people. I hope people the next morning walked outside and
birds were chirping and the sun w... 阅读全帖 |
|
发帖数: 1 | 41 用Flint自己的水，停止用底特律供的水，是一个民主党市长的政绩。
We’re supposed to forget that Flint’s Democrat mayor in 2014, Dayne
Walling, made a big production out of the “historic moment” when his city
decided to “return to its roots and use our own river as our drinking water
supply,” after 50 years of using water from the Democrat Wonder City of
Detroit. He led a crowd of onlookers in a three-two-one countdown, pushed
the water-control button with a flourish, and declared “the water quality
speaks for itself,” while a... 阅读全帖 |
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r***s
发帖数: 737 | 42 did you hear any chirping sound when the engine is running?
if so, you need to change your camshaft and camshaft synchronizer |
|
|
t****y
发帖数: 3494 | 44 2006年corolla，59k麦，没换过drive belt
前几天发现车启动后有“滋滋”的噪音，根据修车铺的意见，大致诊断为drive belt问题
按照网上的方法，给belt涂上肥皂或浇水，声音会消失，但很快又会出现
很可能为chirp，原因是misalignment（两周前做过一次alignment）
但奇怪的是，这个声音并不像网上描述的那样，加速会消失
恰恰相反加速才会出现，idle没有或很少的噪音
此外，这个噪音不会随着车温度升高而消失
仔细看了一下drive belt，没有发现明显的纵向裂纹。
belt应该没坏。
如果是tensioner坏了，会不会出现这样奇怪的现象？
实在是百思不得其解，各位大侠请指点一二，不胜感激 |
|
y**x
发帖数: 379 | 45 找到了
Beep w/lock & unlock
When using the remote to lock/unlock the doors the hazard lights will flash,
and you'll also hear the door lock actuators if you're in a somewhat quiet
environment. We want to enable the audible chirp/beep sound though.
In the owners manual, on page 24-25 it shows how you can choose the "setting
confirmation signals". They show the options being:
A) hazard lights flash
B) an acoustic sound
C) both light and sound (what we want)
D) off - no light or sound
However, when I ... 阅读全帖 |
|
|
n********e
发帖数: 41 | 47 楼主 看到 你 isDiffByOne 函数就知道你必然要超时
Leetcode免费给你用 就别挑剔了。凡事要先从自身找问题
你那个测试不是大数据
真正的大数据在这里：
start = "nanny";
end = "aloud";
String[] d = {"ricky","grind","cubic","panic","lover","farce","gofer
","sales","flint","omens","lipid","briny","cloth","anted","slime","oaten","
harsh","touts","stoop","cabal","lazed","elton","skunk","nicer","pesky","
kusch","bused","kinda","tunis","enjoy","aches","prowl","babar","rooms","
burst","slush","pines","urine","pinky","bayed","mania","light","flare","
wares","wom... 阅读全帖 |
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h***g
发帖数: 2 | 48 您好，我对这个security engineer工作很感兴趣。以下是我的resume
Xu Han
30 Chatsworth Ave Apt2
(716)
440-0396
Buffalo, NY
... 阅读全帖 |
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b**j
发帖数: 20742 | 49 大概一分钟chirp一下，换了电池也响。把电闸开关了一次，这下所有的都开始此起彼
伏的响了，怎么办？求救！！！ |
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