h*h
发帖数: 27852 | 1 【 以下文字转载自 ChinaNews 讨论区 】
发信人: hsh (三胡), 信区: ChinaNews
标 题: 气温变暖也许是好事？
发信站: BBS 未名空间站 (Wed Nov 9 14:33:32 2011, 美东)
如果现在是冰河期的话，地球能支持多少人？
30亿？40亿死掉？
20亿？50亿死掉？
Next Ice Age Delayed by Global Warming, Study SaysChristine Dell'Amore
National Geographic News
September 3, 2009
Humans are putting the brakes on the next ice age, according to the most
extensive study to date on Arctic climate change.
The Arctic may be warmer than it's been in the past 2,000 years—a trend
that is reversing a natural co... 阅读全帖 |
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l*****7
发帖数: 8463 | 2 一个全球性的猫捉老鼠的游戏
1. 奥巴马是个超级猫, 但是, 大脑太慢, 不是个好猫;
2. 斯诺登 (Snowden)是一个超级鼠, 大脑太快;
3. 美帝CIA 和大阴帝国007都在瞎盲, 乐坏了。
超级鼠大胜超级猫
Link below:
<<<<<<<<<<<<<<<<<<<<<<<<<<
http://finance.yahoo.com/news/snowden-run-040000305.html
Snowden on the Run
A global cat-and-mouse game involving the admitted leaker of National
Security Agency secrets exploded into a diplomatic scramble, as U.S.
authorities sought to catch Edward Snowden before he reached what supporters
say is his next goal: political asylum in Ecuador.
Mr. Sno... 阅读全帖 |
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l*****7
发帖数: 8463 | 3 一个全球性的猫捉老鼠的游戏
1. 奥巴马是个超级猫, 但是, 大脑太慢, 不是个好猫;
2. 斯诺登 (Snowden)是一个超级老鼠, 大脑太快;
3. 美帝CIA 和大阴帝国007都在瞎盲, 乐坏了。
超级老鼠大胜超级猫
Link below:
<<<<<<<<<<<<<<<<<<<<<<<<<<
http://finance.yahoo.com/news/snowden-run-040000305.html
Snowden on the Run
A global cat-and-mouse game involving the admitted leaker of National
Security Agency secrets exploded into a diplomatic scramble, as U.S.
authorities sought to catch Edward Snowden before he reached what supporters
say is his next goal: political asylum in Ecuador.
Mr. S... 阅读全帖 |
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s***d
发帖数: 15421 | 4 日本 哈哈哈 30年前的老黄历了。而且日本三十年前厉害的是pure analog。换句话说
都是audio band 的amplifer filter 之类的，给摄影录音设备而已，低频的。 他那的
几个都是2~3GHz的高频，直接都是射频级别的mixed signal。 这个东西的好处就是，
可以搭broadband system，pll也能简化，不需要fractional PLL了， 因为没有了
mixer。 航空射频，雷达上都是很有用的东西。 |
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g******o
发帖数: 4042 | 5 只是试图链接，没有成功传输数据，具体情况不明
看来是美国人掌握的卫星
直接查卫星通讯记录，发现机栽天线一直在ping
话说回来， 美国媒体在这种事情上还是有操守的
至少努力给你圆回来
不会直接删贴尿遁
wsj现在压力很大，纽约时报，华盛顿邮报都在等着看笑话
Corrections & Amplifications
U.S. investigators suspect Malaysia Airlines Flight 370 flew for hours past
the time it reached its last confirmed location, based on an analysis of
signals sent through the plane's satellite-communication link designed to
automatically transmit the status of onboard systems, according to people
familiar with the matter. An earlier version ... 阅读全帖 |
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W*****d
发帖数: 4196 | 6 Dr. Susan Xiao-Ping Su
President of Tri-Valley University
Tri-Valley University TVU
E-mail: s*[email protected], s***[email protected]
EDUCATION
Ph .D. Department of Mechanical Engineering, University of California at
Berkeley, 2001.
Major: Design; Minor I: Microscale Heat Transfer; Minor II: Integrated
Circuit Technology.
Dissertation: Compliant Microleverage Mechanism Design for MEMS Application
Dissertation Advisors: Prof. Alice M. Agogino; Prof. Tsu-Jae King, Prof.
Dennise K. Lieu
M. S... 阅读全帖 |
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z**********e
发帖数: 22064 | 7 http://www.wsj.com/articles/the-coming-chinese-crack-up-1425659
The Coming Chinese Crackup
By
David Shambaugh
March 6, 2015 11:26 a.m. ET
The endgame of communist rule in China has begun, and Xi Jinping's ruthless
measures are only bringing the country closer to a breaking point
Chinese President Xi Jinping, front center, and other Chinese leaders attend
the opening meeting on Thursday of the third session of the National People
's Congress at the Great Hall of the People in Beijing. Photo: Xinh... 阅读全帖 |
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t****z
发帖数: 8931 | 9 美国宇航局 NASA 根据29年来87,000 张影像进行的分析，由于气候变暖，加拿大北部
包括魁北克北部和其他北部地区以及美国阿拉斯加西部的植物及绿带明显增加，近30年
来增加近30%，准确而言是29%。
根据 NASA 科学家的研究报告，在北极地区温度的升高幅度高于地球上任何其它地区，
导致极地地区的植物有更长的生长季节，土壤也发生相应变化。极地苔原不仅生长出更
多的灌木，而且越来越厚。虽然目前对其确切的影响机制尚不甚了解，但有越来越多的
证据显示，这可能是最终影响到碳循环的结果。
美国国家海洋和大气管理局（NOAA）2014年发布的一份专题报告称，北极地区气温的升
幅比全球其它地区气温的升幅要高出一倍，被称为北极放大效应（Arctic
amplification）。空气和海洋表面温度的增加，导致格陵兰冰盖表面的反射率下降，
陆地春雪和海洋夏冰大面积萎缩，有些都影响到北极熊种群的数量和健康。
美国宇航局的科学家 Jeffrey Masek 说，用陆地卫星 Landsat 所拍的影像进行的比较
分析显示，大面积的绿带沿加拿大北部海岸苔原，尤其是魁北克和拉布拉多北部，以及
阿拉斯加西部... 阅读全帖 |
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f***y
发帖数: 4447 | 10 http://bbs.netbig.com/thread-2702025-1-2.html
一期9篇研究性文章，1/3是科大的，郭光灿组两篇，潘建伟组一篇
另外在news and views还有一篇点评潘建伟的工作
etters
Experimental investigation of the no-signalling principle in parity–time
symmetric theory using an open quantum system - pp642 - 646
Jian-Shun Tang, Yi-Tao Wang, Shang Yu, De-Yong He, Jin-Shi Xu, Bi-Heng Liu,
Geng Chen, Yong-Nan Sun, Kai Sun, Yong-Jian Han, Chuan-Feng Li & Guang-Can
Guo
doi:10.1038/nphoton.2016.144
The violation of the no-signalling principle — information can be
tr... 阅读全帖 |
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t**x
发帖数: 20965 | 11 谢的工作
MALBAC是谢晓亮教授最新发展出的单细胞基因组扩增方法，与多重置换 (MDA：
Multiple Displacement Amplification) 基因组扩增方法相比，它采用了线性扩增而
非传统的指数扩增方式，因而能够大幅度提高扩增的均一性。
全世界目前每十对夫妇中就有一对面临生育障碍，每年依靠生殖辅助技术降生的婴儿高
达五十万。 但是，受限于目前辅助生殖过程中胚胎筛选的技术水平，胚胎成功移植并
最终产下婴儿的成功率仅为30%左右。
据介绍，成功率之所以如此之低，主要是由于传统受精卵筛选的方法不够精确。通常，
为了降低各类风险，例如怀上多胞胎，可导致流产的子痫前症以及大出血等，医生们只
能将一个胚胎移植入子宫。 传统的筛选依据主要是受精卵的形态，而形态判断主要依
靠医生的主观经验，可见传统方法的精确度是难以保证和提高的。 胚胎移植成活率低
的主要原因之一在于各类染色体异常。 因此，植入前的全基因组遗传筛查不但可以最
大限度地提高移植胚胎成活率，提高试管婴儿的健康水平，而且可以大幅降低医疗费用
，减轻孕妇的痛苦，为社会和病人节约大量资源。
据北医三院生殖医学中心主任乔杰... 阅读全帖 |
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x****6
发帖数: 4339 | 12 丫物理出身，后来博后去做蛋白质，主要搞数据分析，测序。丫根本就不是细胞生物学
家/发育生物学家，跟医学更是不相关。
丫就一外行来蹭crispr的风头。根本就不负责的态度。
1. Yan Gao, Liwei Deng, Qin Yan, Yongqian Gao, Zengding Wu, Jinsen Cai,
Daorui Ji, Gailing Li, Ping Wu, Huan Jin, Luyang Zhao, Song Liu, Liangjin Ge
, Michael W. Deem, Jiankui He* (2016) “Single molecule targeted sequencing
for cancer gene mutation detection” Scientific Reports, 6:26110(pdf)
2. Ronghai Cheng, Ross Ka-Kit Leung, Yao Chen, Yidan Pan, Yin Tong, Zhoufang
Li, Luwen Ning, Xuefeng B. Ling, Jiankui He*... 阅读全帖 |
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C*I
发帖数: 4736 | 13 有人说，和前些年送到国际病毒中心的菌株/原体是一样的。 如果一样， 问题不就很
简单和明白嘛？ 这因此就能解说通很多怪异的现象和反应了。
中国科学院武汉病毒国家研究所的P-4, P-3实验室：
2004年Sars之后建立的国家级national 病毒研究机构。下辖有P2，P3， P4 三个生物
病毒研究室。其中，P3 研究室是从事各种病毒的收集，保管，和对未完成培养的病毒
和材料的保存，管理，操作与使用。
P4 研究室：
It possesses complete level 4 biosafety protection facilities, management
and personnel system, and has the comprehensive abilities to conduct level 4
detection, isolation and identification, pathogenic characteristic analysis
, research on infection and pathogenic mechanisms, and the v... 阅读全帖 |
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C*I
发帖数: 4736 | 14 武汉病毒所有几个级别的实验室level， 依次是安全曾级最高的P4， P3，P2 和不进入
分类的安全程度最低的ordinary laboratory, animal feeding room and relevant
supporting facilities.
对于corona virus等完成实验的病毒，是列被如 p-4 级别管理。 而对于正在进行实验
并已经感染的动物和材料， 并不列入p-4管理，而是列入p3级别来管理的。
P3
The National Biosafety Laboratory, Wuhan (NBL3), covering an area of about
280 m2, is divided into the auxiliary working area and the protection area
with its core working area, 140 m2, made up of 3 cell labs, 1 small-sized
animal lab, 1 medium-sized animal lab, and 1 dissecting... 阅读全帖 |
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发帖数: 1 | 15 英文媒体也报道了
https://apnews.com/Business%20Wire/fe24e251ddb843a9b091561a06f8eead
Clover Initiates Development of Recombinant Subunit-Trimer Vaccine for Wuhan
Coronavirus (2019-nCoV)
CHENGDU, China--(BUSINESS WIRE)--Jan 28, 2020--
Clover Biopharmaceuticals, a global clinical-stage biotechnology company
focused on developing novel and transformative biologic therapies, today
announced that it has initiated development of a recombinant subunit vaccine
for 2019-nCoV, the newly identified coronavirus tha... 阅读全帖 |
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x********e
发帖数: 35261 | 16 LAMP只是isothermal amplification的一种。IA与传统PCR对应。至于定量，不是靠扩
增方式，而是靠探针。Abbott的平台也没有高通量，卖点就是体积小可以床旁诊断。成
都那边研发的panel chip才是一次检测多病原体，有低通量和高通量版。 |
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x********e
发帖数: 35261 | 17 你们又土鳖了吧。这叫isothermal amplification。现在用于微生物检测很流行的。普
通千老肯定没听说过。国内很早就在做这个试剂盒了，不主流而已，你们当然不知道。 |
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发帖数: 1 | 18 这贴太高端没法舔没法喷
：你们又土鳖了吧。这叫isothermal amplification。现在用于微生物检测很流行的。
普通千老肯定没听说过。国内很早就在做这个试剂盒了，不主流而已，你们当然不知道
。--
：※ 来源:·WWW 未名空间站 网址：mitbbs.com 移动：在应用商店搜索未名空间·[
FROM: 2601:152:4101:8] |
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P****i
发帖数: 1362 | 19 ABT 可以买吗？
：你们又土鳖了吧。这叫isothermal amplification。现在用于微生物检测很流行的。
普通千老肯定没听说过。国内很早就在做这个试剂盒了，不主流而已，你们当然不知道
。--
：※ 来源:·WWW 未名空间站 网址：mitbbs.com 移动：在应用商店搜索未名空间·[
FROM: 2601:152:4101:8] |
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j******r
发帖数: 1428 | 20 飞机对雷达隐形的理论就是如何减低电磁反射的理论,和飞控没关系, 飞控之类是搞隐
形的技术, 不是理论.
读物理的, 或读过J.D.JACKSON 的 ELECTRODYNAMICS 这门课的都知道这门课的能吸引
学生的话题之一(为数不多), 就是关于隐形飞机的电磁原理. 不论你在哪里读这门课,
说到这一理论的发现历史, 都要讲有关Petr Yakovlevich Ufimtsev (Пётр Я&#
769;ковлевич Уфи́мцев) 的PTD理论, 和他的书"Method of
Edge Waves in the Physical Theory of Diffraction"(1962) 以及关于 LM 和
NORTHROP的工程师就是拿着这书的英译本当教材加上SUPER COMPUTER 设计出F117和B2
的.
诺贝尔奖不会发给隐形, 若发的话, 公认的是要给Ufimtsev, 不会给美国的LM或
NORTHROP或任何其他人. 这都是有定论了N年的东西, 硬辩是没意义的.
成飞, 沈飞, 西飞, 南航, 北航, 凡是搞飞机的, 哪里没有几十本他的PTD?... 阅读全帖 |
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l****z
发帖数: 29846 | 21 “我是个科学家，曾经是靠推销全球暖化吃饭的，我理解相关的证据，我曾是个人造全
球暖化信徒，现在我是个怀疑论者”
Carbon warming too minor to be worth worrying about
By David Evans
The debate about global warming has reached ridiculous proportions and is
full of micro-thin half-truths and misunderstandings. I am a scientist who
was on the carbon gravy train, understands the evidence, was once an
alarmist, but am now a skeptic. Watching this issue unfold has been amusing
but, lately, worrying. This issue is tearing society apart, making fools out
of our... 阅读全帖 |
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l****z
发帖数: 29846 | 22 By SUDEEP REDDY and SCOTT THURM
U.S. companies are scaling back investment plans at the fastest pace since
the recession, signaling more trouble for the economic recovery.
U.S. companies are scaling back investment plans at the fastest pace since
the recession, signaling more trouble for the economic recovery. Sudeep
Reddy reports on Markets Hub. Photo: AP.
Half of the nation's 40 biggest publicly traded corporate spenders have
announced plans to curtail capital expenditures this year or next, a... 阅读全帖 |
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l****z
发帖数: 29846 | 23 January 15, 2015 - 5:32 PM
By Michael W. Chapman
(CNSNews.com) – Within 24 hours of Rev. Franklin Graham calling on Duke
University to end its policy allowing a Muslim Call to Prayer from the bell
tower of the campus chapel, the school did just that, saying it was “
committed to fostering an inclusive, tolerant” environment but that the
Muslim prayer “effort to unify was not having the intended effect.”
“I am glad to hear that Duke University reversed its decision to allow the
Muslim call to pra... 阅读全帖 |
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t*****1
发帖数: 1459 | 24 JRGuzman Puerto Rico 3 hours ago
And still here we are trying to explain Trump, giving an amplification to
his message of bigotry, nativism and abject idiocy. Like mice, we are
trapped in Trump's mouse wheel, churning over and over his latest rant or
racist comment. False equivalence and a misguided desire from the press to
appear balanced has enabled this narcissistic fool to thrive. Trump has
already done major damage to our body politic and our race relations. And
regretfully, our feckless pr... 阅读全帖 |
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l******g
发帖数: 222 | 25 终于不能忍受原厂speaker的音响效果，决定升级一下，只装speaker就可以，不需要
amplifer,subwoofer。预算150－300刀。有如下几个问题：
1）什么牌子比较好？看过poineer, polk，不过完全没用过。
2）是不是要3－way和4－way的好一些,相对于2－way的？
3）如果前后门都要装，是不是要买two pairs?
车是A6. 谢了！ |
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m*******g
发帖数: 242 | 26 因搬家处理这套Logitech x-530 5.1
Specifics:
5.1-Channel speaker system for PCs, Macs, audio receivers, DVD players, or
game consoles
FDD2 satellite technology produces uniform sound field for rich results
Dedicated center channel enhances dialogue
Master volume and subwoofer level controls for convenient access
70 Watts RMS total system power (7.4 watts x 4, plus 15.5-watt center
speaker and 25-watt subwoofer)
Model: 970114-0403
Speaker Amplification Type: Active subwoofer, passive satellites
Speakers ... 阅读全帖 |
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m****i
发帖数: 10 | 27 Perfect for beginning students and experienced players alike.
Specifications
* 88-note graded hammer action keyboard
* 4 voices including a new stereo piano sample
* Dual voice feature
* 32-note polyphony
* 20W stereo amplification system
* Compact cabinet design with sliding key cover
* Headphone socket for silent practice (headphones optional extra)
$400.00 |
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b****g
发帖数: 4933 | 28 ☆─────────────────────────────────────☆
Watson (福尔摩斯的癞皮狗) 于 (Thu Nov 3 01:38:06 2005) 提到:
发信人: zzpt (法师,游牧), 信区: shopping
标 题: Re: 人生终于完整了
发信站: BBS 未名空间站 (Thu Nov 3 01:36:09 2005), 转信
On..it is trash... it amplifer is much worse than 502
and its speaker is real trash from Onkyo...
it main front speaker, I bought it seperately from Ubid.com, for only 35 per
pair... to harsh.... really bad...
Say, its cable... is too thin... even though monster cable is also trash
but Monster XP speaker ca |
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I*******e
发帖数: 1879 | 30 这个是用两个identity功放推，还是用高频和中低频分开的专用功放推？ |
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L*******y
发帖数: 231 | 31 我没试过。我的音箱可以这样连。high 和 low 的接线柱里面是各自的高通或低通，所
以可以用两台相同的功放来推，也有人建议用声音好的功放推中高音，功率大的推低音。
还有一种很土的连接 bi wire，不过意义可能不大。版上有KEF 或 B&W 的试试？ |
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I*******e
发帖数: 1879 | 32 好点的音箱都是bi wire，KEF，B&W我都有，但觉得没太大比用这么接吧？
我倒是有两根bi wire的线，功放端两两接在一起，音箱端四根分开接。
音。 |
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i*d
发帖数: 2640 | 33 分频怎么分？
两个功放都是同样输入，全频段输出？然后音箱分频？
音。 |
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m***s
发帖数: 215 | 35 Bi-amping to good speakers sounds better. I don't think they need to
identical amps.
I used one AudioNote for the hi, and use AN's pre-output to for the input of
Onix SP-3 which connect to the low post of Triangle Aetna. I do not use
external crossover. AN can control the whole volume and I adjust the Onix
volume for the low frequency. |
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k*****n
发帖数: 9823 | 36 bi-wire没啥用，就是等于线粗了点而已
bi-amp可能有用，YMMV |
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T*****w
发帖数: 802 | 37 上个月背到家了，
刚搬完家， 几件东西就相继挂了
1. Bel Canto DAC： 能闻到里面有臭胶皮味， 插上电源后，指示灯不亮
2. Cary SLI-80 Tube 功放， 就是整机没电， 检测过背后两个fuse
都是正常， 检查电源线插上后，两级之间电阻为开路（正常应为200-300欧）
有没有人有经验啊修啊，，，想自己先检查后才决定是否寄回给厂家。 |
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y********n
发帖数: 145 | 39 What about receiver? Koraoke needs mixer&lifier, home theatre needs
multi-channel AV, can I use some generic amplifer for both?
I appreciate any thoughts. |
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q********n
发帖数: 3248 | 40 谢谢大牛们，我也要组建卡拉ok了，现在家里除了电脑和电视已经电脑连电视的线有之
外，就都有新购了。
准备音响是bose 301一对
Shure PG-58 一对
Behringer MIX800 MiniMIX
那么功放选什么呢？
那个receiver需要吗？要另买吗？
十分感谢！！！！！！！！！ |
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A***o
发帖数: 351 | 41 a receiver OR an amplifier will do the job.
You do not need both. |
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e*******l
发帖数: 1269 | 42 建议你不要买MIX800。接口太少，音质不好。Behringer的话1002fx或者1204fx稍微贵
点，但功能音质都要好的多。 |
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j***k
发帖数: 2719 | 43 there are a lot of excellent speakers for music listening.. to many to list... It really depends on your budget. At every budget level, there are good speakers. It also depends on your personal taste in music. There is simply no good or bad speakers, only those of which suits ur tatste or those of which don't...
I have 2 systesm at home, both for music only:
System 1 in family room:
Linn Unidisk SC CD player
Piega C3 LTD speaker
Accustic Arts Power I mk2 integrated amplifier
System 2 in living r... 阅读全帖 |
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j***k
发帖数: 2719 | 44 Contour 1.3 MkII is very nice, but it requires good amplification. What's LZ
's amp? Amp matching is just as important as the speaker itself.
Like I said before, at the end of the day, we can talk all we want here, but
the important thing is for you to audition the speakers yourself and judge
for yourself. The final sound quality is also depends on the environment and
your system synergy. It is less about tech specs.
Before my daughter was born, my wife and I used to go to live concerts at
Carne... 阅读全帖 |
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D**********s
发帖数: 3139 | 45 WOOFER MODULE: 97 POUNDS, MIDRANGE/TWEETER MODULE: 53 POUNDS, SYSTEM: 150 POUNDS EACH.
even it's the original version, for 500 bucks, how would you go wrong with
that
Similar to those 4 ohm mcintosh speakers, you gonna need high current cable
and amplification. |
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D**********s
发帖数: 3139 | 46 if there is a low level output(ie., usually no volume changing, or native
low level signal without any further amplification circuit but only damping.
If it's a headphone amp incorporated, probably not low level.), yes, you
may connect it to 708. Otherwise, I don't suggest having any amp before 708,
EQ probably OK. Lumped amps normally result in terrible SNR and dynamic
range. |
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D**********s
发帖数: 3139 | 47 if there is a low level output(ie., usually no volume changing, or native
low level signal without any further amplification circuit but only damping.
If it's a headphone amp incorporated, probably not low level.), yes, you
may connect it to 708. Otherwise, I don't suggest having any amp before 708,
EQ probably OK. Lumped amps normally result in terrible SNR and dynamic
range. |
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D**********s
发帖数: 3139 | 48 afaik, models prior to matrix s2 were well-known for their low-eff. Unless with good amplification, they are 30 years old muddy sound you should probably avoid... Once you got nice amps, you will dump them eventually.
Try offer 500 bucks self-pickup if you insist... :D |
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j***k
发帖数: 2719 | 50 相位 = polarity
In layman's term, it is connecting the red cable to the black terminal and
the black cable to the red terminal, from your amp to your speaker. Or from
your CD player to your amp, or etc...
Certain CD player/Pre-amp/Amp are designed this way to increase fidelity by
eliminating a round of conversion. If the compoent is designed that way, it
would say so in the manual so when you connect the component to next element in the chain, you would have to reverse. I used to own a Linn KAIRN/... 阅读全帖 |
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