f********1
发帖数: 1601 | 1 多谢各位啊, 可怜俺以前还是学EE的。搞embedded system久了什么东西都丢了
loss.
dorminant at heavy loads, so high frequency PWM control is used. At light
loads, switching losses are dornimant, so to improve the efficiency and
decrease the switching frequency, PFM is always used.PFM frequency changes
with load current. At heavy loads, under PFM mode, frequency will be too
high which is not good for lots of things.
loads because it is easy for EMI design. So PWM is more propular. |
|
h********t
发帖数: 555 | 2 The original question is why quantization noise is band limited to fs/2.what
you claimed is that the spectrum of the sampled data is band limited to fs/
2. From design aspect,as an approximation, we may assume that is true, but
strictly speaking, neither of them is really band limited to fs/2.
with ideal impulse sampling, for the sampled data, the high frequency
spectrum of the original signal will be aliased back to lower frequency,
but the lower frequency components will get high frequency |
|
b*******t
发帖数: 164 | 3 Q: just now. You said that convolution in time domain is corresponding to
multiplication in frequency
domain. This is for continuous time. How about the property for discrete
time signal?
A: the circled convolution in time domain is related to multiplication in
frequency domain.
The question is not correct. linear convolution is for continuous frequency
(continuous time aperiodic signal and discrete time signal), circular
convolution is for discrete time and discrete frequency.
原因 |
|
ET
发帖数: 10701 | 4 clock frequency是 sampling frequency,
它的大小是怎么定的，就是和signal frequency 一样。
不过写到这，我又想起来，因为有个oversampling一说。
所以这个clock frequency也是有讲究的。。 |
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i*********n
发帖数: 320 | 5
Vortex radio waves could boost wireless capacity “infinitely”
After four years of incredulity and not-so-gentle mocking, Bo Thide of the
Swedish Institute of Space Physics and a team in Italy have finally proven
that it’s possible to simultaneously transmit multiple radio channels over
exactly the same wireless frequency. In theory, according to Thide, we could
potentially transmit an “infinite number” of TV, radio, WiFi, and
cellular channels at the same time over the same frequency, blasting ... 阅读全帖 |
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z*****n
发帖数: 7639 | 6 I think I have answered your question.
The signal before ADC may contain any frequency, including
all the aliases. But after the sample, according to the
sampling theorem, all the aliases will be presented as
fundamental frequency f. DAC can only outputs frequencies
up to Fs/2. Thus the input and output "analog" signals are
different.
An alias frequency can be sampled, but ONLY become fundamental
after the sampling. |
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g****t
发帖数: 31659 | 7 不用这么复杂吧.
直观来看,任何ADC不可能精确抓住出来DAC的step那一瞬间.
理想的step包括了所有频率分量.
I think I have answered your question.
The signal before ADC may contain any frequency, including
all the aliases. But after the sample, according to the
sampling theorem, all the aliases will be presented as
fundamental frequency f. DAC can only outputs frequencies
up to Fs/2. Thus the input and output "analog" signals are
different.
An alias frequency can be sampled, but ONLY become fundamental
after the sampling. |
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j********t
发帖数: 92 | 8 You will still have frequency modulation even it's pure linear. Because you
have a carrier signal with frequency fc and a modulation signal with
frequency fm. At the frequency domain, you will have fc+fm and fc-fm. |
|
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m****r
发帖数: 141 | 9 The interview has been done.
Give a sequence of data (with duplicates), move a fix-sized window along the
data sequence and find mode in the window at each iteraion, where the
oldest data is removed and a new data is inserted to the window.
I cannot find better solutions here.
My idea: Use a hashtable, key is the data, key's data is the frequency of
the data occuring in the window.
At the first iteration, iterate each data in the window and put it to the
hashtable, meanwhile cout the frequency o... 阅读全帖 |
|
s******r
发帖数: 324 | 10 Tower招过做mid frequency,后来还是赶走了,Mark Gorton不太能忍受drawdown,据我所
知现在tower 没有stand alone的mid frequency group.有可能大的HFT group招人做些
mid frequency的,反正他们sharpe 太高,只要mid frequency做的不是很大,还是没
drawdown. |
|
n*****5
发帖数: 61 | 11 A frequency report of the variable Jobcode in the Work.Actors data set is
listed
below.
Jobcode Frequency Percent Cumulative
Frequency Cumulative
Percent
Actor I 2 33.33 2 33.33
Actor II 2 33.33 4 66.67
Actor III 2 33.33 6 100.00
Frequency Missing = 1
The following SAS program is submitted:
data work.joblevels;
set work.actors;
if jobcode in ('Actor I', 'Actor II') then
joblevel='Beginner';
if jobcode='Actor III' then
joblevel='Advanced';
else joblevel='Unknown';
run;
Which of the following repr... 阅读全帖 |
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P*****i
发帖数: 63 | 12 29.A frequency report of the variable Jobcode in the Work.Actors data set is
listed below.
Jobcode Frequency Percent Cumulative
Frequency Cumulative
Percent
Actor I 2 33.33 2 33.33
Actor II 2 33.33 4 66.67
Actor III 2 33.33 6 100.00
Frequency Missing = 1
The following SAS program is submitted:
data work.joblevels;
set work.actors;
if jobcode in ('Actor I', 'Actor II') then
joblevel='Beginner';
if jobcode='Actor III' then
joblevel='Advanced';
else joblevel='Unknown';
run;
Which of the following r... 阅读全帖 |
|
R*****s
发帖数: 41236 | 13 Strokes Of Genius: Use Swimming To Stay Fit
http://www.bodybuilding.com/fun/strokes-of-genius-use-swimming-
Swimming is a survival skill, but it is also a high-end full-body workout
that increases your aerobic potential and also offers resistance. It抯 a win
win win.
by Shannon Clark Jul 30, 2012
From the moment human beings find themselves immersed in water, several
things become apparent: It takes a lot of energy to stay afloat, the body
needs to move in unfamiliar ways, using unfamiliar muscle... 阅读全帖 |
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w*******y
发帖数: 60932 | 14 Link:
http://www.musiciansfriend.com/stupid/?CJAID=10684459&CJPID=532
quote
# Frequency response: 56Hz-22kHz
# Crossover frequency: 3kHz
# Low-frequency amplifier power: 40 watts
# High-frequency amplifier power: 30 watts
# Signal-to-noise: >100dB (typical A-weighted)
# Polarity: positive signal at + input produces outward LF cone displacement
# Input impedance: 20k Ohms balanced, 10k ohms unbalanced
# Input sensitivity: 85 mV pink noise input produces 90dBA output SPL at one
meter with volume c... 阅读全帖 |
|
w*******y
发帖数: 60932 | 15 Link:
http://www.frys.com/ads/page2
Frys B&M has a pair of Infinity Primus P363 speakers for just $199.98.
These are currently $199.99 each at NewEgg.
Model
Brand
Infinity
Series
Primus
Model
P363BK
Spec
Type
Floorstanding Speakers
Sold As
Each
Driver Units
Low-Frequency Driver: Dual 6-1/2" (165mm) MMD
Midrange Driver: 4" (100mm) MMD
High-Frequency Driver: 3/4" (19mm) MMD
Power Rating
Recommended Power Amplifier Range: 10 - 200 watts
Frequency Response
38... 阅读全帖 |
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w*******y
发帖数: 60932 | 16 SLIM SPEAKERS, SERIOUS SOUNDKEF's revolutionary T Series is in a different
league from any low profile speaker you've ever heard. As one of the world's
thinnest high performance home theatre systems, the new T Series combines
several landmark innovations: a radical new ultra-low profile bass and
midrange driver, and a large, fully vented new tweeter. By incorporating
both in cabinets only 35mm (just over 1.25in.) deep, the T Series brings you
all the pleasures of true audiophile quality sound in... 阅读全帖 |
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b****y
发帖数: 103 | 17 here is what I think.
I guess you want to characterize the impedance of a waveguide.
from the reference in wikki, it seems to me that you only need to figure out
the cutoff frequency.
so maybe you can first estimate the cut off frequency, then get a tunable
laser near that range, and find out the cut off frequency by fine tuning the
laser.
after the cut off frequency is found, you can get the impedance |
|
d*****u
发帖数: 17243 | 18 有个现象很有意思，
就是Y染色体C系和D系的，在北亚和东南亚都相对比较多
但是在中国很少
Although Haplogroup C-M130 attains its highest frequencies among the
indigenous populations of Mongolia, the Russian Far East, Polynesia,
Australia, and at moderate frequency in the Korean Peninsula and among the
Manchus, it displays high diversity among modern populations of India.
Like haplogroup C, D-M174 is believed to represent the Great Coastal
Migration along southern Asia, from Arabia to Southeast Asia and thence
northward to populate East Asi... 阅读全帖 |
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M*****8
发帖数: 17722 | 19 【 以下文字转载自 Quant 讨论区 】
发信人: JunkFood (忧伤的老板), 信区: Quant
标 题: Ex-SocGen Trader Found Guilty of Stealing Secrets
发信站: BBS 未名空间站 (Fri Nov 19 14:51:54 2010, 美东)
Ex-SocGen Trader Found Guilty of Stealing Secrets (Update1)
(Updates with sentencing date in second paragraph.)
By Patricia Hurtado and Bob Van Voris
Nov. 19 (Bloomberg) -- Former Societe Generale SA trader
Samarth Agrawal was found guilty of stealing trade secrets
related to the bank’s high-speed computer trading software.
A... 阅读全帖 |
|
c**i
发帖数: 6973 | 20 (1) 歼-20拉开美中军事竞赛帷幕？ VOA Chinese, Jan 14, 2011.
http://www.voanews.com/chinese/news
/20110114-Challenges-Posed-by-J-20-113673394.html
Quote:
(a) 美国权威武器问题专家、莱克星顿研究所(Lexington Institute)的劳伦.汤普森博
士(Dr. Loren Thompson)说：
“我不知道中国军方是否想到了这一点，那就是，盖茨访华期间歼-20的试飞无意之中
很可能给美国的军工企业助了一臂之力。
“美国人通常对中国事务不是特别留心，但是国防部长盖茨访华期间，有关中国的新闻
，大家都很留心。而这期间，中国试飞了众人之前都认为10年之内不可能研发出的战机
，立即吸引了所有人的注意力。
"这一回，中方彻底做到了美国国内没有人能做到的，那就是，让国会重新考虑是否应
当继续生产F-22战机。
(b) 汤普森说，美方最终是否决定生产更多的F-22，目前还不好说，但是，假如决定继
续生产F-22的话，那么，F-22的主要厂家、洛克希德-马丁公司(Loc... 阅读全帖 |
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j***h
发帖数: 4412 | 21 Earthquake detection systems can sound the alarm in the moments before a
big tremor strikes—time enough to save lives
Japan’s system, which went live in 2007, makes heavy use of personal
technology. Alerts go out not only on television and radio but through
special receivers in homes, offices and schools. Pop-up windows on
computers show a real-time map with the epicenter’s location and the
radiating seismic waves. A timer counts down to the shaking at your
location and highlights predicted inte... 阅读全帖 |
|
|
c*****g
发帖数: 21627 | 23 【 以下文字转载自 IndustryParty 俱乐部 】
发信人: choming (请抵制“十万强插”计划！), 信区: IndustryParty
标 题: 揭秘4G核心专利
发信站: BBS 未名空间站 (Mon Jun 8 04:14:08 2015, 美东)
揭秘4G核心专利 (2015-03-03 19:30:02)
从2012年10月份决定写《通信之道》，到现在差不多两年半的时间，第一版终于成稿，
以此文作结。
3G霸主
1985年，在美国硅谷成立了一家叫Qualcomm(高通)的公司。 这家公司把军用的CDMA技
术用于民用通信，推出了IS-95标准，成为与欧洲的GSM竞争的第二代移动通信系统。
在第二代的商业竞争当中，GSM还是取得了的胜利。但是在高通公司的创始人当中有一
位世界级的科学家，叫做Andrew Viterbi，就是那位Viterbi译码算法的发明人，IEEE
Fellow，并获得了美国最高科技奖。在他的推动下，产业界相信了CDMA代表了无线通信
技术的发展方向，因此第三代移动通信的三个国际标准，WCDMA， CDMA2000和TD-SCDMA
都采... 阅读全帖 |
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d*b
发帖数: 21830 | 24 抗干扰跟距离没关系，不懂无线电通信的少说几句。frequency hopping也对付不了干
扰。frequency hopping更多的是为了加密和提高bandwidth和frequency的利用率 |
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w********2
发帖数: 632 | 25 Experimental evidence
Many laboratory studies of bacterial conjugation, trans- duction and
transformation over the last 80 years have provided valuable insights into
some of the mechanisms and frequencies of HGT. More recently, field studies
on HGT support many of the laboratory findings (Souza et al., 2002) and
reveal the widespread occurrence of HGT amongst bacteria and viruses (Maeda
et al., 2006; Sander and Schmieger, 2001; van den Eede et al., 2004;
Weinbauer, 2004).
HGT has been recorded i... 阅读全帖 |
|
g********d
发帖数: 4174 | 26 Results
Top of page
Abstract
Introduction
Materials and methods
Results
Discussion
Conclusion
Acknowledgements
References
Review of epidemiological data from donors and other sources
The prevalence of anti-HIV in blood donors is very low. Both the number and
the proportion of anti-HIV-positive donors, reported as MSM, have fallen
over the years (Fig. 1). However, this route of infection still constituted
approximately 27% of anti-HIV-positive donations during 1998–2000. Sexual
intercourse betwee... 阅读全帖 |
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l*******g
发帖数: 27064 | 27 当然我说的不是整个iihs，而是iihs的网站建设部分，丰田向来对付媒体很有一套
因为这个网站上的东西是给用户看的，搞成什么样保险公司才不会管
人能拿到第一手资料就行了
记得以前yaris在iihs的insurance loss统计数据里对乘客保护全美市场倒数第一，现
在最新的列表竟然没了，suzuki sx4成了倒数第一，倒数前十竟然都没有yaris，因为
从具体数据看，yaris只有一项数据，其他部分都是空的
Highest claim frequency: Personal injury protection
Vehicle Vehicle size and class Claim frequency
Suzuki SX4 Small four-door car 203
Mitsubishi Galant Midsize four-door car 189
Dodge Avenger Midsize four-door car 176
Hyundai Accent Mini four-door car 162
Kia Forte Small four-door car 162
N... 阅读全帖 |
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H*****u
发帖数: 1766 | 28 你跟老色狼较真就傻了。按照IIHS Personal Injury，Sienna/Odyssey也比Grand
Caravan / Town&Country好（06-08年有点例外），爬坡王一般也比同级别美车强点，
但Corolla/Camry确实比不上Honda/Ford的对应车型。我印象中IIHS测试中丰田很多车
型头部保护似乎差一点，但侧撞成绩很不错，有兴趣的可以仔细看看。
不过我也认为，就被动安全（已经发生了的车祸）来说，IIHS Personal Injury比05-
08死亡率更有参考意义。05-08死亡率偶然性太大，现实中受伤的情况远远多于死亡的
情况，所以受伤统计结果更可靠；没有把主动安全（司机群体差别）过滤掉，比如出现
Truck VS SUV的翻倍差别。另外，如果某个车型05-08年恰好是老款，那么死亡率数字
会吃亏；而IIHS Personal Injury的数字已经连续统计10年左右。IIHS Personal
Injury结果基本没有surprise。
至于IIHS Personal Injury的claim frequency，我觉得不必细究，他们选择fre... 阅读全帖 |
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a********k
发帖数: 2 | 29 Job Position Quantitative Trader
Position Quantitative Analyst/Trader
Location China-Shanghai
Remuneration Competitive base salary + bonus
Position Type Permanent
Employment Type Full time
Responsibilities
l Involved in the research on optimal trading and execution strategy design
for Quantitative Relative Value (QRV) and Statistical Arbitrage(SA) trading
desks.
l Involved in the research on analyzing market microstructure and modeling
trans... 阅读全帖 |
|
V*****n
发帖数: 893 | 30 plywood is it. and it's light and stiff, which means higher resonate
frequency (above 2khz if well braced). There is not enough energy to
excite the resonate frequency in music.
MDF is much more uniform/consistent and has the lowest contraction. but it
just doesn't sound good as good because it's heavy and flexy, which
translate to lowered resonate frequency (to below 50hz). This can lead to a
dead feel in sound. The reason most commercial speakers are made of MDF is
that it's easy to work with |
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p*******f
发帖数: 521 | 31 你这也太极端了.
那种情况下, 机器的I/O早就不行了.
查了一下,引用如下:
The effect of jitter is difficult to quantify, but its presence gives the
impression of loss of instrument definition, narrowing of stereo image,
collapse of soundstage depth, etc.
Jitter is more apparent in higher frequencies than lower frequencies. If it
is periodic rather than random, it has an effect similar to 'flutter.' For a
given test tone, it will produce sidebands equal to the jitter frequency.
While the level of this distortion is low, it can st... 阅读全帖 |
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D**********s
发帖数: 3139 | 32 可能是从kenrockwell网站上看得吧：
This Matrix 805 is the first version of today's $5,000-the-pair B&W Diamond
805. Exactly like today's 805 Diamond, this original 805 Matrix uses a 6.5"
(165mm) woven Kevlar cone with 30mm Kapton-former voice coil, and uses the
exact same tweeter as B&W's top-of-the line 800-series speaker of its time.
This original Matrix 805 has a more attractive tweeter than the weird-
looking thing on top of the new Diamond 805, and more importantly, this
Matrix 805 uses a far more adva... 阅读全帖 |
|
Y*******g
发帖数: 150 | 33 Frequency response: 50Hz-23kHz +/-3dB
power handling: 75W RMS / 300W Peak
sensitivity: 92dB @ 2.83V / 1m
nominal impedance: 8 ohms compatible
high frequency drivers: 1" (2.54cm) Titanium diaphragm compression driver
mated to 90x60 square Tractrix® Horn
high freq crossover: 2000Hz
low frequency drivers: 5.25" (13.3cm) Cerametallic™ cone woofer
enclosure type: Bass-reflex via rear-firing port
height: 11.4" (29cm)
width: 6.5" (16.5cm)
depth: 10.75" (27.3cm)
mounting: Keyhole bracket and ... 阅读全帖 |
|
s**a
发帖数: 1995 | 34 本版大拿，不少小白，像我一样入手了这对音箱，但对给这对音箱匹配一个合适的功放
是给个难题。我看了看手头的资料，还是不太明白，哪位能以这对音箱为例讲解一下匹
配音箱和功放的原则，比如，六欧姆不是典型的阻抗值，怎么计算合适的功率，除了功
率以外还有什么指标要匹配如何匹配等等，实在是功德无量的好事。本人愿意全部包子
赠送。
先锋BS-41指标如下
Enclosure ... Bass-reflex Bookshelf Type
Configuration ... 2-way
Frequency Range ... 55 Hz-20 kHz
Nominal Impedance ... 6 Ohms
Sensitivity (2.83 V) ... 85 dB
Maximum Input Power ... 130 W
Crossover Frequency ... 2.5 kHz
amazon有个ONKYO TX-8050 2.0的receiver，我比较喜欢它的数字输入比较多，光纤/
usb/coax都有，而且列出来的6 Ω loads 100W 功率貌似也够了。他的电气指标如下。
哪位如... 阅读全帖 |
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n*******n
发帖数: 1115 | 35 本人要求不高，能不能只买一套既可以唱歌也可以看电影。想先购置两个主音箱，唱歌
一定要3-way，但是很多落地音箱其实是2-way的。怎么样确定到底是不是3-way的呢，
拆开看有几个圈吗？两个就是2-way，3个就是3-way？但是我看有的产品介绍，说是其
实有两个是woofer的driver，所以是不是就没有中频？比如这对音箱的spec很
confusing
High Frequency Drivers: 1" (2.54cm) Aluminum diaphragm compression driver
mated to 90° x 60° square Tractrix® Horn
Low Frequency Drivers: Dual 6.5" (16.5cm), magnetically shielded IMG woofers
Frequency Response: 38 Hz – 23 kHz
http://www.amazon.com/Klipsch-Synergy-F-20-6-5-Inch-Floor-Stand
图片上看是三个洞，但是看说明，似乎有两个是低... 阅读全帖 |
|
a*****y
发帖数: 311 | 36 For the speakers that I have audited. Maggie 1.7 does sound a lot better
than traditional cone speakers as far as I can tell --- the clarity is
unmatched by the traditional speakers, although I think ML ElectroMotion is
probably even better in clarity. However I think Maggie 1.7 is very
sensitive to the quality of amplifiers. Yesterday I audited Maggie 1.7 first
on a 1600 amplifier and then a 16,000 one, definitely heard the difference.
I am doing my research online and found the following, thin... 阅读全帖 |
|
a*******6
发帖数: 520 | 37 push and pop can be implemented as the insert and delete in a hash table
(or a BST) in O(1) (or O(logn)) time, with the frequency associated
Also maintain a two-level linked list of all the elements (grouping
elements with the same frequency together)... when the frequency of an
element +1 or -1 (push or pop), move this element to the next or the
previous group or create a new group, in O(1) time...
functions |
|
m***n
发帖数: 2154 | 38 来自主题: JobHunting版 - 讨论一道题 find out K most frequent numbers from incoming streams of numbers on the fly
我的方法是 保存 一个hashtable
value---->(int frequency, boolean inHeap)
每一个值，都保存一个频率和是否在heap上
一个MIN Heap, Heap上保存value,frequency, 但只比较frequency
大家还有更好办法么？ |
|
t****a
发帖数: 1212 | 39 俺也贴一个.. 正好学了frequencies这个函数。
(defn times [map-1 map-2]
(apply min (map #(if (contains? map-2 %)
(quot (map-2 %) (map-1 %))
0) (keys map-1))))
(let [input-file "./qualification/alphabetsoup/alphabet_soup.txt"
hackercup (vec "HACKERCUP")
[n & cases] (clojure.string/split-lines (slurp input-file))
hackercup-table (frequencies hackercup)
cases-table (map frequencies cases)
cases-times (map #(times hackercup-table %) cases-tabl... 阅读全帖 |
|
c**m
发帖数: 535 | 40 1. Find 1000 popular URLs in a log.
对于这种log里找popular URL的题目，首先肯定是要用hash去保存每一个URL的
frequency。然后对于返回top k：option 1， sort， O(nlogn)；option2，用一个
size为k的min_heap，O（nlogk）。
Follow up，如果log存在多个machine里，那么肯定是要merge result了。这个时候每
个machine如果只是存一个size为k的heap显然是不够的了。所以我们可以对于每个
machine：opt 1，sort the URL frequency；opt 2， use a min_heap to store all
URL frequency。这里个人感觉opt 1好一些。
2. Return a query based on the occurrence from a big table。
首先这个很大的table，也就是一个很大file，然后不能完全放入main memory里面，是
吧？那个这个其实跟“从一个大文件里随机取出一行... 阅读全帖 |
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t*****h
发帖数: 137 | 41 有限次是不行的。看证明。
flip a coin n times, each outcome has a probability 3^i/4^n, where i is the
number of heads. We can prove that no combination of the outcomes will add
up to 1/2.
Proof by contradiction:
If we multiply all the probabilities by 4^n, and think them as outcome
frequencies(integers). Please note that all the frequencies but all tails
can be divided by 3. Now the question becomes whether you can find a
combination of outcomes which has an added frequency 4^n/2.
Assume there is a way to di... 阅读全帖 |
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B******u
发帖数: 209 | 42 lz刚开始做的是JEE, 后来偶然去了做high frequency trading platform,java写的，
但是只做了一年多一点。 因为lg postdoc转ap就搬到其他地方去了。 新工作又做起了
JEE.
最近有个recruiter推荐了个high frequency trading platform的工作，我去面试了一
下，但是面的很糟糕。 这次的面试跟以前不一样，上次都是问写算法，数据结构的问
题，这次全都是java concurrency api和jvm performance tuning. 我写过
multithreaded的程序，但不是很多。 synchronized, volatile, atomic integer，
concurrenthashmap这些用过了就知道。 但是不知道synchronized static method和
sychronized一般的method有什么不一样, 忘记了什么是semaphore...
面试失败只能说自己学艺不精。 疑惑的是我不知道应该在哪方面下功夫。 如果是JEE,
要学的东西实在太多，各种的framewor... 阅读全帖 |
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u*****o
发帖数: 1224 | 43 我想问问partitioner的作用是什么呢？
比如那个word count的例子
mapper input(line, text) --> output(word, frequency)
combiner input(word, frequency) --> output(word frequency)
combines results from multiple mappers..
Then we use reducer to sort words according to index (e.g. 26 reducers and
each take words for a particular alphabet).
这个例子中如果fit in partitioner呢？ |
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s******d
发帖数: 9806 | 44 找frequency的部分用bucket（double linked）更好一些。每个node就是frequency是
某一个值的所有hashtag，这样每次操作只需要移动到相邻的bucket，或者创建新的
bucket（因为frequency只有加减1）。
node。 |
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s******d
发帖数: 9806 | 45 找frequency的部分用bucket（double linked）更好一些。每个node就是frequency是
某一个值的所有hashtag，这样每次操作只需要移动到相邻的bucket，或者创建新的
bucket（因为frequency只有加减1）。
node。 |
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p*******g
发帖数: 809 | 46 请站内联系。
Sr. Staff, Staff Engineer – RFIC Design
Position Description
Join Samsung R&D organization based in Richardson, Texas, to champion
development of RFIC and sub-systems for next generation of mobile broadband
technology.
Responsibilities
• Interpret system level specs to circuit requirements for
transceiver blocks
• Design, simulate and characterize Radio Frequency Integrated
Circuits (RFICs)
• Conduct detailed circuit design at RF and above frequencies: up/
down... 阅读全帖 |
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h*********1
发帖数: 37 | 47 地点： 宾州匹兹堡
公司： 大型国际公司变频器市场及产品管理部门，业内领先
要求： 如下 （补充： 需要有毕业后5年以上实际产品生命周期管理工作经验, 工业变
频器经验, MBA preferred)
联系： 请发电邮: [email protected]
/* */
谢谢！
[email protected]
/* */----------
Responsibilities:
• For existing products, as Chairman of the Product Change Control
Board (CCB), implement changes related to DTC, quality, new options/features
and technical improvements in order to maintain the profitability and
market share of the product line.
• Participate in developing new produ... 阅读全帖 |
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z********i
发帖数: 27 | 48 公司有Power Management IC Engineer的职位出来。
要求中文流利
有5年以上工作经验
20%的时间要出差回国。 带一个TEAM
请问有没有感兴趣的，我可以REFER，帮递简历
要求：
EDA skills: Spectre, Matlab, ADS etc tools for IC development
1. With a proven track of lead the spec's development of certain PMICs.
2. Developed at least two successful PMICs below:
×high frequency DC/DC(buck or boost)
×requirement: high voltage DCDC with 3MHz switch frequency or above;
×or ultra fast response DCDC;
×or current mode DCDC with 1MHz switch frequency or above;
... 阅读全帖 |
|
z********i
发帖数: 27 | 49 公司有Power Management IC Engineer的职位出来。
要求中文流利
有5年以上工作经验
20%的时间要出差回国。 带一个TEAM
请问有没有感兴趣的，我可以REFER，帮递简历
要求：
EDA skills: Spectre, Matlab, ADS etc tools for IC development
1. With a proven track of lead the spec's development of certain PMICs.
2. Developed at least two successful PMICs below:
×high frequency DC/DC(buck or boost)
×requirement: high voltage DCDC with 3MHz switch frequency or above;
×or ultra fast response DCDC;
×or current mode DCDC with 1MHz switch frequency or above;
... 阅读全帖 |
|
a********k
发帖数: 2 | 50 Job Position Quantitative Trader
Position Quantitative Analyst/Trader
Location China-Shanghai
Remuneration Competitive base salary + bonus
Position Type Permanent
Employment Type Full time
Responsibilities
l Involved in the research on optimal trading and execution strategy design
for Quantitative Relative Value (QRV) and Statistical Arbitrage(SA) trading
desks.
l Involved in the research on analyzing market microstructure and modeling
trans... 阅读全帖 |
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