1. ExperimentalV (in BMElib2.0b1)
2. Cross-variogram calculation in vario
Monday, October 22, 2007
Friday, October 5, 2007
Wednesday, October 3, 2007
Accessibility approach
The accessibility approach can incorporate the road network computational power in GIS to obtain the quantitative value to evaluate the accessibility for a certain area. Dr. Su's student just came by to discuss her topic with me before.
I gave her the suggestion that the random sampling can be applied to obtain the average pattern of the accessibility in a large area. With the consideration of the uncertainty of traffic conditions, e.g. traffic light, traffic jam, or parking time, a range for the access time can be obtain to evaluate the mean and variability of the accessibility of certain area.
I gave her the suggestion that the random sampling can be applied to obtain the average pattern of the accessibility in a large area. With the consideration of the uncertainty of traffic conditions, e.g. traffic light, traffic jam, or parking time, a range for the access time can be obtain to evaluate the mean and variability of the accessibility of certain area.
Tuesday, October 2, 2007
Bad start
Today is my first S/T analysis class ....
It was bad from my point of view. I am not well-prepared for today's class. I should be more ready for the next time, especially for the first part of the class. I did not make the powerpoint file by myself and I did not even review carefully by myself before the class. It is really bad. It should not happen again.
It was bad from my point of view. I am not well-prepared for today's class. I should be more ready for the next time, especially for the first part of the class. I did not make the powerpoint file by myself and I did not even review carefully by myself before the class. It is really bad. It should not happen again.
Thursday, September 6, 2007
A cute cut
A very cute song ... it reminds me what I was in my childhood. I tried to mimic everything from my dad, even speaking the "bad words" as it is in the lyrics. My dad also asks me why I did that with angry and the same response I did as the kid in the mtv ... very funny song.
Sunday, August 19, 2007
Remember -- A-Mei
I just saw this mv by accident. Maybe it says the similar story I have been going through these months. I felt the tears stuck in my eye while I was watching, even before the song started. The voice-over before the song is very touching. For me, even if the date is really about to end, I would like to say thank you for all this. Let's enjoy the song.
記得 - 張惠妹
曲︰林俊傑
詞︰易家揚
編︰吳慶隆
＊誰還記得是誰先說永遠的愛我
以前的一句話 是我們以後的傷口
過了太久 沒人記得當初那些溫柔
我和你手牽手 說要一起走到最後
我們都忘了 這條路走了多久
心中是清楚的有一天
有一天都會停的 讓時間說真話
雖然我也害怕 在天黑了以後
我們都不知道會不會有遺憾
重唱 ＊
我們都累了 卻沒辦法往回走
兩顆心都迷惑 怎麼說
怎麼說都沒有救 親愛的為什麼
也許你也不懂 兩個相愛的人
等著對方先說想分開的理由
誰還記得愛情開始變化的時候
我和你的眼中 看見了不同的天空
走的太遠 終於走到分岔路的路口
是不是你和我 要有兩個相反的夢
重唱 ＊
我和你手牽手 說要一起走到最後
Friday, August 17, 2007
Research Idea: the comparison of two long-term variables (2)
In the discussion of t-distribution idea of comparing two long-term variables
Dr. Chen raised a very constructive comment about this idea and suggested that the definition of the long-term exposure is kind of similar to the idea in the survey sampling, where the long-term exposure can be considered as the exact if the everyday measurement is available.
I did the wrong way to interpret the daily measurements within the long-term period to consider its annual mean variance is the variance of annual exposure. If the measurements are complete, the annual exposure should not have any variance in lieu of the mean variance.
The test should be to check if an random variable with mean and variance can be considered as the approximation of the exact value (z-test), where the null hypothesis is to see if the population mean and sample mean are the same.
Once the measurement is incomplete, I should consult with the sampling analysis to see how to use the incomplete sample to have a representative value and its corresponding variance.
Dr. Chen raised a very constructive comment about this idea and suggested that the definition of the long-term exposure is kind of similar to the idea in the survey sampling, where the long-term exposure can be considered as the exact if the everyday measurement is available.
I did the wrong way to interpret the daily measurements within the long-term period to consider its annual mean variance is the variance of annual exposure. If the measurements are complete, the annual exposure should not have any variance in lieu of the mean variance.
The test should be to check if an random variable with mean and variance can be considered as the approximation of the exact value (z-test), where the null hypothesis is to see if the population mean and sample mean are the same.
Once the measurement is incomplete, I should consult with the sampling analysis to see how to use the incomplete sample to have a representative value and its corresponding variance.
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