173.txt

This complete matlab for neural network

发信人: GzLi (笑梨), 信区: DataMining
标  题: [合集]数据流？流数据？？
发信站: 南京大学小百合站 (Thu Oct  3 22:12:10 2002), 站内信件

geangel (天使想飞) 于Mon Sep 23 16:25:21 2002)
提到：

偶都糊涂了。
请高手指点，这两个是什么区别？


fervvac (高远) 于Mon Sep 23 23:26:30 2002提到：

data stream, stream data, anything confusing?



geangel (天使想飞) 于Tue Sep 24 15:14:11 2002)
提到：

恩。confusing.
哪里用到前面的？哪里用到后面的呀？



ataMining/M.1032877722.A 于标  题: Re: 数据流？流数据？？
提到：
发信站: 南京大学小百合站 (Tue Sep 24 22:30:22 2002), 站内信件

...

Don't u think it is a bad question?



geangel (天使想飞) 于Tue Sep 24 23:43:49 2002)
提到：

if you think so, you're free to kick it.
But, I don't think so.
I'm serious and hope to get an serious answer.



eastcamel (Happy Digger!) 于Wed Sep 25 12:44:03 2002提到：

我的理解是
所有的数据输入都可以看作一种数据流
流数据应该是数据输入速度很快、难以保存、只能实时分析的数据流

比如一个24小时运行的图像采集设备，把它的采集数据保存下来再分析
是不可能的，因为数据量太大，而且不间断，只能是实时分析，也就是
流数据分析



fervvac (高远) 于Wed Sep 25 13:20:58 2002提到：

My reasons:

1. The question is not concrete. 
There are data streams in many context, so is stream data. Doing an overall
comparison of each context they are used is simply not worthwhile.

On the other hand, even if you get the answer, I doubt if it is what you 
really want. Pose youre *real* questions instead and that might be more
helpful.

2. Or the answer is there already.
With some knowledge of english grammar, the two terms are actually describing
two different things, stream and data. Isn't that the exact answer to
your question? Again, I doubt if it is helpful to you.

3. A useful answer but not that relevant to your question.
There is a well-known tutorial on the topic of stream data processing by
Minos Garofalakis, Johannes Gehrke and Rajeev Rastogi at
http://www.bell-labs.com/user/rastogi/tutorials.html

Reading the tutorial carefully and possibly following the references (or
the other way around?) will definitely give you some idea of the whole
picture in this area (from the db perspective).



geangel (天使想飞) 于Wed Sep 25 14:04:38 2002)
提到：

Just as you can suppose, I'm green to DM, as well as computer science.
So you needn't have so much "doubt" :)
A rough answer is enough.
Anyway, thanks a lot!