c**i
发帖数: 6973 | 1 Elisabeth Bumiller and Thom Shanker, War Evolves With Drones, Some Tiny as
Bugs. New York Times, June 20, 2011.
http://www.nytimes.com/2011/06/20/world
/20drones.html?_r=1&ref=elisabethbumiller
("The Pentagon now has some 7,000 aerial drones, compared with fewer than 50
a decade ago. * * * Already the Air Force is training more remote pilots,
350 this year alone, than fighter and bomber pilots combined")
Note:
(a) Wright-Patterson Air Force Base
http://en.wikipedia.org/wiki/Wright-Patterson_Air_... 阅读全帖 |
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j***k
发帖数: 2719 | 3 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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N*D
发帖数: 3641 | 4
spec;
然后是high level system architecture/diagram，画几个框(Logical compoents)；
然后是Component API;
Walk through use cases，完善API，对于use case能写大概的sequence diagram就更好
了；walk through的过程也是反复verify user requirement的过程，有些细节可能在这
个时候会凸现出来。
然后是对核心component的设计，这个时候可能涉及OO design，logical data schema啥
的；
最后才是数据结构和技术细节，比如你说的Trie
我的两分钱，供大家参考。
湖北边的) 的大作中提到: 】 |
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g*****g
发帖数: 34805 | 5 js is a lousy language. Google develops gwt to free you from js.
wicket, vaadin like frameworks do the java wrapping on top of
ajax compoents so you don't have to.
nodejs is just the opposite. If js is your most proficient language,
you may try. Otherwise it's not worth looking. |
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c****n
发帖数: 21367 | 6 从复杂系统的观点，“复方里多成分综合作用”的概率远远大于有一个或者
少数几个紧密相关的lead compoent(s)的概率... |
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E*****a
发帖数: 757 | 7 最不准的估计就是BW。你的这些compoents都是discrete，在loop里你根本没有办法
精确simulate parasitics，poles/zeros和gain的位置，估计你只能读datasheet,这
没法用的。voltage step input里不是一个frequency，你也没法验证。
你应该反过来推。用经验dV/dI的方法推BW，而不是假定BW来验证dV/dI。因为你的BW
根本无法精确知道。而dV/dI起码是精确的
要是你在做IC，也许sim还准点。要是你是用分离的搭，sim的结果完全不可用 |
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G******n
发帖数: 749 | 8 谁能给我解释一下 在time series 里面 怎么也搞不清楚 |
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s**********8
发帖数: 25265 | 9 21CFR part11 is US GMP compoent electronic signatures. |
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