Dilan Dissanayake

5 Questions 8 Answers 0 Followers

Questions related from Dilan Dissanayake

What could be the reasons for discrepancies in stationary R-squared and MAPE?

Attached is a Table summarizing the MAPE and stationary R-squared values obtained for alternative exponential smoothing forecasting models for different variables. In general, the model with the...

09 May 2020 640 2 View

What is the criterion to determine the minimum number of lags required to make a meaningful forecasting using ACF?

I hope to forecast swine population using last 30 years of census data. The original time series has 81 time points (from 1937-2017) and I have already worked out the ACF correlogram (attached...

16 December 2019 3,660 3 View

What is the best model from the following exponential smoothing models?

I have modeled four non-seasonal exponential models using time series data on pork production over the period 1978-2012. data from 2013-2017 were hold-out for model validations. For simple...

01 June 2019 2,180 4 View

What is the physiological charge of nicotinamide/niacinamide?

The pKa (strongest acidic) of nicotinamide/niacinamide has been given as 13.39 which should logically exist as a positively charged molecule at the physiological pH (7.4). However, the...

31 May 2016 7,071 1 View

Can anybody tell me how I can separate Gly-Tyr and Tyr-Gly with the same m/z using RP-HPLC?

I need to separate a mixture of dipeptides Gly-Tyr and Tyr-Gly using RP-HPLC.

05 January 2015 1,479 7 View