changes to daily rdahmm

Here are some important changes to daily rdahmm that we made these days but not posted here yet:

1. There are two phases for every station. The first phase is the training procedure, where rdahmm is run on the historical gps data (1994-01-01 to 2006-09-30) of every station to get a rdahmm model for this station. The second phase is to evaluate the daily data (data 2006-10-01 to "today") of every station with the model trained in first phase.

2. Portlet users can now select a specific date to see status change information of all stations on that day. A calendar and a slider bar is added to help the users choose the date. Besides, the colors used for map markers are now denoting different meanings. Red is used for markers of stations with a status change on the selected date, yellow is used for stations with status changes within 30 days before that date, and green is used for no status changes during that time. As for the output links, the model files (.A, .B, .pi, .range, .minval, .maxval, .L) are from the trained rdahmm models of the stations, while the evaluation files (.Q, .input, .png) are from the evaluation phase.

3. We now have a station list of all 460+ stations of California. However, the portlet is running very slow with such a large number of stations, because of the high workload of checking the status changes for all stations for every selected date, and rendering the markers on the map. I am trying to do modifications to both the format of the xml file of status changes and the checking algorithm to make it work.