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全部话题 - 话题: amplifer
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z***o
发帖数: 2104
1
来自主题: LeisureTime版 - 转贴 看荣格自传 读后感 (转载)
荣格的“佛性”
的确,不能用实验科学,甚至是科学方法的标准来检视荣格的分析心理学(analytic
psychology)和弗洛伊德的精神分析学(psychoanalysis),将它们划归解释学(
hermeneutics)更为合适。正如书中所说:“他并非不熟悉科学方法(他的早期研究已
经证明了这一点),而是他的眼光必须超越科学”。"Science comes to a stop at
the frontiers of logic, but nature does not: she thrives on ground as yet
untrodden by theory." --Jung
那么荣格心理学,在当前科学替代哲学作为人类追求真理最强有力手段的形势下,
价值何在?一方面,从客观上讲,我愿意接受以下说法:“他不能容忍的是 ...... 拒
绝相信一切不能为科学所解释的事物。他要求给予那些非理性的、不受因果关系制约的
、科学认为不值得关注的体验以应有的重视”。另一方面,从主观上讲,这类体验大量
充斥于我们的日常生活,成为人性的喜怒哀乐(如果不是生老病死的话)和社会结构根
源的显化(... 阅读全帖
n******8
发帖数: 558
2
来自主题: LeisureTime版 - Harp 再贴一首英文的竖琴 旧的 小改
Harp
I erect a harp by the mirror lake.
In the mirror I gaze at her grace,
and wish she would sing when awake.
When autumn breeze wrinkles her face,
I hear fallen leaves pluck her string.
And see golden sun rays decorate her reflection.
Harp sings a song of mesmerizing spring,
Till I tie autumn with affection.
竖琴是很有意思的乐器。 几天前开车带小宝去上游泳课, 电台播放着很好听的音乐。
我是家里公认的乐盲, 五音不全, 对音乐的感知仅限于好听和不好听的欣赏水准。
因为好听, 就问小宝, 是什么乐器。小宝答, 竖琴。 我也不知哪来的信心, 坚定
地否决他, 是吉他, 想是因为大学被迫听过太多的吉他, 初学者的吉他。 痛苦的记
忆总是留的久些。 小宝自然不买我的。 好在音乐不长,... 阅读全帖
C****o
发帖数: 994
3
来自主题: Music版 - Home theater system值不值得买?
要价$175. 二十年的东西了,觉得贵。不知道到底值不值?
配置如下:
SONY CDP-C505 5-CD Disc Change
8X OVERSAMPLING/
18 BIT DIGITAL FILTER
DUAL D/A CONVERTER SYSTEM.
HAS A STEREO RCA OUTPUT
VINTAGE CLASSIC SONY HIGH QUALITY SURROUND SOUND STEREO RECEIVER
FOR MUSIC, HOME THEATER (MOVIES), VIDEO GAME AMPLIFICATION.
LASER DISC LD & TURNTABLE PHONO INPUTS
MODEL STR-D1015
Sansui Audio Program Timer AT-20 VINTAGE
Specifications:
Clock Type: 12-hour cycle indication for AM or PM
Display Type: Fluorescent display
Time Accuracy: AC powe... 阅读全帖
m***T
发帖数: 11058
4
ID: medIT (乐版新人,请轻拍)
歌名: 外婆的澎湖湾
翻唱说明:
前一段时间正好在woot上看到这个refurbished的avid vocal microphone的deal,所以
终于买了自己第一个真正能录音的mic,想暂时拿来练练手,所以也就没买pop filter

http://tech.woot.com/offers/avid-vocal-studio
另外对录音刚入门,对怎么更好使用mic,以及如何做后期还没啥经验。录音用的是AA3
.0,没有其它的插件,象noise reduction, reverb,echo,amplification等AA带的也
不太会调。经常调出来的显得鼻音很重,估计肯定是哪儿调的不对。有谁知道应该怎么
能避免这种情况吗?
这首歌只录了一遍,所以很多细节唱得不够,以后争取改进。
歌曲链接:
曲作者:
叶佳修
词作者:
叶佳修
原唱:
潘安邦
歌词:
晚风轻拂澎湖湾 白浪逐沙滩
没有椰林缀斜阳 只是一片海蓝蓝
坐在门前的矮墙上 一遍遍怀想
也是黄昏的沙滩上 有着脚印两对半
那是外婆拄着杖将我手轻轻挽
踏着薄幕走向余辉暖暖的澎湖湾 ... 阅读全帖
L*****e
发帖数: 1086
5
我觉得可能很适合初学者,号称音乐零基础都行
https://www.coursera.org/course/guitar?utm_classid=971509&utm_nottype=course
.newsession.signup&utm_notid=1633&utm_linknum=1
Course Syllabus
Lesson 1: Acoustic / Electric Guitar and the Basics
Parts Options, Accessories, Quick Start to Playing
Lesson 2: Getting Started: Fundamental Guitar Skills
String Names, Tuning, Pick Technique, Finger-Style, Strumming
Lesson 3: The Twelve Half Steps and Basic Notation
Frets, Notes on the Staff, Notes on the Fretboard, Notes on the Staf... 阅读全帖
x**0
发帖数: 6149
6
来自主题: PhotoGear版 - 刚在水木看到的
haha,这个像qPCR amplification curve
n*****s
发帖数: 10232
7
来自主题: PhotoGear版 - 今儿晚上挺顺
你那amplifer要是还有,等我搬完家联系你
e*f
发帖数: 1709
8
Steiner 7x50 Marine Binocular ------$289.98 from Amazon.com
The amplification 7X is at the upper end of a casual user who won't feel the
shake of his hands. The X50 gives you large exit pupil
50/7=7mm which makes aiming (your eyes to the lens) and viewing (no black
background) very pleasant.
l*****o
发帖数: 19653
9
看来需要一点chemical amplification。。。
b*s
发帖数: 82482
10
engineers came in to seminate the earth……

看来需要一点chemical amplification。。。
z***o
发帖数: 2104
11
来自主题: Heart版 - 转贴 看荣格自传 读后感
荣格的“佛性”
的确,不能用实验科学,甚至是科学方法的标准来检视荣格的分析心理学(analytic
psychology)和弗洛伊德的精神分析学(psychoanalysis),将它们划归解释学(
hermeneutics)更为合适。正如书中所说:“他并非不熟悉科学方法(他的早期研究已
经证明了这一点),而是他的眼光必须超越科学”。"Science comes to a stop at
the frontiers of logic, but nature does not: she thrives on ground as yet
untrodden by theory." --Jung
那么荣格心理学,在当前科学替代哲学作为人类追求真理最强有力手段的形势下,
价值何在?一方面,从客观上讲,我愿意接受以下说法:“他不能容忍的是 ...... 拒
绝相信一切不能为科学所解释的事物。他要求给予那些非理性的、不受因果关系制约的
、科学认为不值得关注的体验以应有的重视”。另一方面,从主观上讲,这类体验大量
充斥于我们的日常生活,成为人性的喜怒哀乐(如果不是生老病死的话)和社会结构根
源的显化(... 阅读全帖
a*********a
发帖数: 3656
12
激光是标准的意义+BBS规则啊。
light amplification by stimulated emission of radiation
受激辐射光放大。
导弹比飞弹强太多。导弹突出制导(guided),没有制导的叫火箭(rocket)。
z***o
发帖数: 2104
13
来自主题: Midlife版 - (转载)荣格的“佛性”
的确,不能用实验科学,甚至是科学方法的标准来检视荣格的分析心理学(analytic
psychology)和弗洛伊德的精神分析学(psychoanalysis),将它们划归解释学(
hermeneutics)更为合适。正如书中所说:“他并非不熟悉科学方法(他的早期研究已
经证明了这一点),而是他的眼光必须超越科学”。"Science comes to a stop at
the frontiers of logic, but nature does not: she thrives on ground as yet
untrodden by theory." --Jung
那么荣格心理学,在当前科学替代哲学作为人类追求真理最强有力手段的形势下,
价值何在?一方面,从客观上讲,我愿意接受以下说法:“他不能容忍的是 ...... 拒
绝相信一切不能为科学所解释的事物。他要求给予那些非理性的、不受因果关系制约的
、科学认为不值得关注的体验以应有的重视”。另一方面,从主观上讲,这类体验大量
充斥于我们的日常生活,成为人性的喜怒哀乐(如果不是生老病死的话)和社会结构根
源的显化(manifest... 阅读全帖
x*****u
发帖数: 3419
14
来自主题: Translation版 - A Very Short History of Bad Writing z
A Very Short History of Bad Writing
Now, anyone familiar with the history of English prose might wonder
whether anything we do here will substantially improve its future. Since
the earliest times, many writers have graced us with much good writing.
But others have afflicted us with much that is bad. Some of the reasons for
the bad writing are rooted in history, others in personal experience.
In the last seven hundred years, English writers have responded to
three influence... 阅读全帖
o*****s
发帖数: 1445
15
来自主题: ECUST版 - 老D进来一下
最近好吗?以前听说您老收藏了一些VINTAGE级别的HIFI,或者我们退一步,叫STEREO
吧。我现在想玩ROTEL,LUXMAN,SANSUI,MARANTZ,DENON这些牌子的VINTAGE STEREO
。基本上准备配一个INTEGRATED AMPLIFER,加上好点的音箱,CD头。收音机还没想好
要不要。因为现在就听个NPR。美国的音乐不喜欢,古典的不懂。另外据说现在都是数
字的时代了。我估计暂时就不要了。
这个音箱你有概念吗?VINTAGE的是不是不行啊?好的类似B&W入门,大概要多少钱能
进?我看见几个SANSUI的音箱,都是很老的。但是不敢进。功率都很大的。
AMPLIFIER你推荐哪几个?CD头你推荐哪个?SACD有意义吗?我也就是随便玩玩,无非
是听听刘德华而已。
c*******n
发帖数: 1648
16
有个engineering degree 拿个一两万学费 几个月的时间 coding school 就让老o 找
到工作了
Coding Schools Tone Down Rosy Job Script
Robust Hiring Market for People Fluent in Programming Has Boosted Student
Enrollment
By MELISSA KORN and LAUREN WEBER
May 20, 2014
Dev Bootcamp requires participants to complete nine weeks of preparatory
material on coding basics before classes start. Shown, graduates mingled
with potential employers in Chicago in April. Taylor Glascock for The Wall
Street Journal
Learn to code. Get a job. Then... 阅读全帖
a**********k
发帖数: 1953
17
Also, there are various types of fiber SFPs, depending on the
laser wavelength used. For example, 1550nm laser
can travel longer than 1310nm laser without amplification.
If you want to use long distance fiber, make sure to use LR
(long reach) SFPs instead of MR or SR ones.
a**********k
发帖数: 1953
18
来自主题: EmergingNetworking版 - 想学习一下这个Data Center Switch
When 100G/40G ports become common, DWDM/ROADM in enterprise will follow.
There will be issues in laser amplification, power balancing
to be resolved.

from
fibre
n**h
发帖数: 694
19
来自主题: Hardware版 - 请教下SSD Benchmark的问题
OCZ Vertex 2用的是不同的controller, ATTO的测试比较适合它。因为OCZ Vertex 2得
sandforce controller是通过实时数据压缩来实现小的write amplification,以此提高
random读写速率。你提到的几个其他的benchmark软件使用的是完全随机的数据做读写
的测试,这时
候OCZ Vertex 2的优势就无法体现了。

SSD
n**h
发帖数: 694
20
来自主题: Hardware版 - 请教下SSD Benchmark的问题
也得看跑什么程序, PS之类的应该快不少。
Vertex 2这款新的controller还需要等待用户验证。他们号称write amplification降
到0.5, intel的是1.1,一代的SSD大多在4-7甚至10左右。低的写放大除了增加随机写
的速率,还影响到SSD的寿命和长期使用的 performance,正因为Vertex 2的低写放大
,他们用的是差一档的 MLC(5000次),而Vertex1和其他非sandforce controller的
SSD用的是10000次MLC。这最后的折中会对SSD寿命有何影响,现在还不很清楚。

是整
t****g
发帖数: 35582
21
来自主题: Hardware版 - OCZ Vertex 2 128GB $199AR 咋样?
MLC flash是有写入寿命的,一个cell写入超过3000/5000次就会坏掉,然后没法写入。
但是里面保存的信息半年左右之内可以读出来。
所以SSD才需要有所谓的wear leveling的算法。
flash另外还有一个特点就是只能sector by sector的擦除,这个玩过单片机的人可能
都有经验。比如一个ARM的工控机,你要update几个数据,哪怕只有几个byte,也需要
重新擦除整个sector,比如512 byte,然后再写入。这个就是所谓的write
amplification,写放大。
正因为有这两个问题,SSD drive的firmware和主控算法的好坏对drive的寿命和性能影
响至关重要。
t*******y
发帖数: 2432
d*****0
发帖数: 68029
23
来自主题: Hardware版 - 问个OCZ的SSD口碑
520可靠性更好。
Intel 520系列固态硬盘为了增加数据可靠性将奇偶位数据分布在整个固态硬盘阵列的
所有NAND闪存中,该款固态硬盘在格式化之后会预留一部分容量,剩余容量空间中有一
半用于控制写入放大(write amplification)和损耗平衡(wear leveling),另一半则用
于冗余NAND阵列,一种类似RAID磁盘阵列冗余的新技术,主要用于失败数据恢复。
t****t
发帖数: 6806
24
是8种状态没错, 不过你两说的都不靠谱
flash都是以块为单位写的, 操作次数和TLC/MLC每单元有几位关系不是很大.
当然更大的块会造成write amplification变高.
TLC主要是便宜, 不过本身写得慢些, 寿命也短
G****r
发帖数: 5579
25
来自主题: Programming版 - IBM Sues Priceline for Patent Infringement
Company Alleges That Priceline Owes It Royalties
By MARIA ARMENTAL
Updated Feb. 10, 2015 2:06 p.m. ET
International Business Machines Corp. is suing Priceline Group Inc.,
claiming the online travel company built its business on IBM’s inventions
and owes it royalties on the billions of dollars in revenue allegedly made
from IBM’s patents.
In a civil complaint filed Monday in U.S. District Court in Delaware, IBM
said Priceline and related websites, including kayak.com and opentable.com,
use IBM’s ... 阅读全帖
l*****k
发帖数: 587
26

the central doctrin of genetics dictates
DNA-> RNA -> protein, though RNA -> DNA sometimes.
for the gene on DNA to work, they first has to be transcripted into RNA, then
in most cases, be translated into Protein. Upregulation means more
transcription of the gene into its corresponder mRNA... downregulation means
the opposite. Gene amplification and deletion happens but very rare, and, most
likely can't be detected by the method you are using.
Gene regulation, as you might have seen, can happen
m**o
发帖数: 13
27
Yes, PCR method can be used for some cases.
what I am saying is that you have to consider the fidelity of those methods. If
fidelity could be sacrificed, PCR of cz could be used to amplify the DNA. Thats
why I was saying it depends on your purpose of amplification.
You must understand if the fidelity can be sacrificed before deciding to use
PCR. Well, it is possible High F PCR could overcome the problem.
I did not say that PCR method can not be used.
r******m
发帖数: 173
28
来自主题: Biology版 - cloning菜鸟求教大家
I am trying to clone a 300 bp gene into pTYB2 vector (7.4kb)for later
protein purification method by IMPACT-CN. NdeI (producing sticky end) and
SmaI (blunt end) restriction sites were constructed into primers
corresponding to the N- and C- termini of the gene and incorporated by PCR
amplification. The PCR product and the vector were both double digested with
SmaI and NdeI respectively. After gel purification, the digested insert (
gene) and the vector were used to perform ligation with T4 DNA li
t*x
发帖数: 1065
29
来自主题: Biology版 - 有关qRT-PCR一问,请大家帮忙
Thanks for your response.
Yeah, I also concern about that. But if I load less cDNA, there is no
amplification curve before 40 cycles at all.
The machine settings did not change at all, but I'll double check. Thanks!
l******u
发帖数: 936
30
来自主题: Biology版 - 关于microRNA的问题

we have modified one commercial kit to get total-RNA with small RNA from
laser microdissected cryosections.
sure, it require RT and pre-amplification
just treat it as usual way as total RNA preparation for microarray.
microRNAs are such short ~22 nucleotide RNA sequences, so they are more
stable than mRNA, some people even do microRNA array from paraffin samples.
p*******r
发帖数: 66
31
use "print screen"
h****6
发帖数: 229
32
If you are only comparing PCR product,one possibility is salt carryover that
slowed down DNA. If you dilute the DNA, it may run normally. I know that if
too much DNA (or RNA) is loaded, the sample will run slower.
Illumina adaptor has phosphothioate modification but after PCR it is gone.
Another possibility is that DNA actually becomes ssDNA because of over
amplification.
O******e
发帖数: 4845
33
ErbB2 OE or amplification is tightly correlated with human breast cancer.
Actually, some people just claim that the OE of ErbB2 causes breast cancer.
The causal role of ErbB2 OE is almost certain in mice since the animal
model has been widely used.
w******y
发帖数: 8040
34
both activating mutation and amplification都常见了
A******y
发帖数: 2041
35
来自主题: Biology版 - ChIP-qPCR control primer
Well, I said unlikely, does not mean it is impossible. If you want to take
your time to design the probe, that's fine. As long as you check
amplification linearity with your primers and the probe, you should be okay.
However, you still need multiple housekeeping genes. I have done several
RT-PCR using published primers and they are not linear at all. Do you think
I will really believe their results?
g******n
发帖数: 9
36
来自主题: Biology版 - next generation sequencing technology
再请教一个问题。
现在市面上的Whole Genome/Transcripton Amplification kit (比如Sigma的GenomePlex和NuGen的Ovation WTA等),哪些和NGS的分析软件 compatible?
f*****4
发帖数: 83
37
来自主题: Biology版 - next generation sequencing technology
顶,好文。这个行业发展很快,对于普通的医生或研究人员来说,数据分析和解读是个
很大的CHALLENGE.
我看好PACBIO,拭目以待十个仪器的结果,如果好的话,可能会DOMINATE THE MARKET
替代ILLUMINA。其实COMPLETE GENOMICS 不能算THIRD GEN SEQUENCING,只能算SECOND
GEN,因为有AMPLIFICATION, 不知道实际的结果怎么样,但是从设计上来说是简单化
的SOLID,没有COLOR CODE,不是很IMPRESSIVE,错误率可能不会低,成本低主要是
LIBRARY PREP 简单。ILLUMINA 的成功主要在于它的USER FRIENDLY. 喜欢SOLID的设计
,没有用过,SEQUENCE ALIGNMENT 比较依赖REFERENCE,否则错一个,整个SEQUENCE就
错了。
C*******e
发帖数: 4348
38
来自主题: Biology版 - 关于PCR的问题。。
你的模板是什么?我用过takara的LA(long amplification),P过细菌基因组DNA做模板
的12kb片段
w******e
发帖数: 1187
39
一直用HRP-ABTS做ELISA,antibody signal强用的挺好。最近做aptamer
based ELISA,经常要develop1、2个小时,很是郁闷。请问有没有signal
amplification比较强劲的enzyme-substrate pair,产物是fluorescent
也行。//bow
c****l
发帖数: 1086
40
Not as easy as you thought, let's say you will got a litter of ten mice, are
you gonna breed all of the Cre+ mice with Cre- mice to figure out which is
homo Cre? Since the mice are good for breeder only 6 months or so, by the
time you figure out which is homo Cre, you are only left with 3 months. I do
not think it is practical to do this routinely.
RACE, is Rapid Amplification of cDNA Ends which is used to get full-lenght
cDNA, has nothing to do with insertional site analysis.
not sure about par
R****n
发帖数: 708
41
来自主题: Biology版 - SNP Genotyping
多少个?几十还是几百?
几十的话,HRM, taqman.如果是genomic DNA可以考虑一下MPLA (multiplex probe
ligation amplification)在sequencer上作,一根管子能做三四十个位点
几百的话,single base extension, Ligation or Hybridization microarray. 公司
应该会帮你设计probe的.
A******y
发帖数: 2041
42
来自主题: Biology版 - 请教drug screen中的技术问题
http://www.invitrogen.com/site/us/en/home/Products-and-Services/Applications/Nucleic-Acid-Amplification-and-Expression-Profiling/qRT-PCR/Direct-from-Cells.html
Is this the similar kit you are using? If it is, then you are not really
isolating RNA. The concept is really simple. You can make a custom lysis
buffer and run it with media in theory.
c******r
发帖数: 3778
43
来自主题: Biology版 - 怎么GENOTYPE HOMOZYGOTE tg MICE
sybr green也可以,但是需要分开跑。
sybr green是个non-specific的DNA double strain dye.就是说,只要是PCR产物都可
以stain。所以没法用multiplex reation做internal control。
如果用taqman,pcr效率不错的话,可以设计两对primers,一对测你的target
sequence,一对做个其他随便什么基因的sequence。分别用不同的颜色标记。这样在一
个样品里跑两个pcr。如果如果target sequence是control的50%(一般给+-20%的误差
)就是single copy。如果和control一样(也是20%误差)就是two copies。
如果你的primers设计比较好,两对的amplification efficiency非常接近,那么可以
直接用ct数来计算二者的关系。但是如果两对primers的效率相差比较多,那么只能每
次都分别给两个primer做standard curve。这样保证二者的定量可比,也是可以的。就
是麻烦点。
r********y
发帖数: 18
44
来自主题: Biology版 - 关于qRT-PCR
非常感谢,是不是说,如果primer 的amplification efficiency比较高的前提下,这
种差别是可以接受的?
另外一个问题是,您在使用standard curve的时候,每次都要重新做standard curve
还是reuse(我知道,理论上讲,应当每次都要重新做标准曲线,但是我们的target
gene 比较多,每次都要做standard curve 比较困难)

85^
control
delta
curve
c******r
发帖数: 3778
45
来自主题: Biology版 - 关于qRT-PCR
我想应该是可以的。
如果target比较多,每次一个个run standard curve确实很麻烦,也很浪费。
如果不得不comprimise, 我想能不能每个target先run几遍standard curve,make
sure the amplification efficiency varies in an acceptable range。这个可以直
接得出efficiency的average和std。这样以后run的时候不再run target的standard
curve,而是只run一个internal control的standard curve。通过refer你前面的
standard curve中的internal control来确定你的PCR run at optimal efficiency。
而且make sure你的target的Ct fall into你的linear range。
反正就是想点办法吧,你觉得这样行不行?
这种事情每人情况不一样,反正需要自己设计实验让它能够reasonablely convincing
就好了。
c******r
发帖数: 3778
46
来自主题: Biology版 - 请教遗传学问题,谢谢!
ok,如果3有可能,那可能是因为你的sample里面混了很多不同来源的DNA,有正常的,
有肿瘤的,不同阶段的肿瘤的。
你说的同一个样本是指同一个tissue提了三次,还是提好的同一个PCR sample测了三次?
由于各种DNA之间的amplification efficiency差不多,所以有可能这次这个dominant
,下次那个dominant。
解决办法就是楼上说的,clone出来,把每个sample取几个不同的clone分别去
sequencing。
我是瞎猜的,是不是这样,需要实验证实。

吗?
t****p
发帖数: 1504
47
来自主题: Biology版 - 再次请教cancer stem cell
说到肿瘤的heterogeneicity,我来说点外行的想法。
就是说stem cell的概念不是绝对的,孤立的。所以人们引入了全能、多能的概念,又
引入progenitor,transient amplification cell的概念,目的是把连续的事件人为划
分为可描述的几个阶段。
相似的,在我看来找绝对概念的CSC是有问题的。一个肿瘤里面不应该只有两个细胞群
体,能重新形成肿瘤的csc和不能形成肿瘤的一般细胞,而是说每个细胞能形成肿瘤的
能力有高有低而已。所以,人们设想可以通过消灭一个肿瘤细胞中的特定细胞群来消灭
肿瘤的想法是误入歧途的。
C*******e
发帖数: 4348
48
来自主题: Biology版 - 奇怪的PCR结果
有个4kb的片段比较难amplify
好不容易折腾得可以P出来了
然后放到TOPO-II里面去测序(blunt end)
5'端好几次都给我奇怪的结果:
amplification序列如果是这样(从PCR的primer开始,测序是在insert位点上下游比较远的地方,
所以能看到back bone):
5'TTAGGCCGGCC.....
我得到的就是这样:
5'GCCGGCC......
本该是PCR forward primer 5'的四个碱基不见了
直接导致一个限制性酶切位点不完全
primer是IDT定的
从IDT订过可能有上千的primer,从来没有遇到过这样的情况
现在我不知道是primer的问题还是有什么别的原因
版上有人遇到过么?
当然我准备定新的primer看看有没有帮助
不过还是百思不得其解这是怎么回事啊
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