کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
997262 936351 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Zero-value problems of the logarithmic mean divisia index decomposition method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Zero-value problems of the logarithmic mean divisia index decomposition method
چکیده انگلیسی

Recently, the Logarithmic Mean Divisia Index (LMDI) approach to energy decomposition has been espoused as the preferred indexing method. Whilst the LMDI method provides perfect decomposition, and is time-reversal invariant, its strategy to handle zero-values is not necessarily robust. In order to overcome this problem, it has been recommended to substitute a small value δ=10-10–10-20δ=10-10–10-20 for any zero values in the underlying data set, and allow the calculation to proceed as usual. The decomposition results are said to converge as δδ approaches zero. However, we show that under this recommended procedure the LMDI can produce significant errors if applied in the decomposition of a data set containing a large number of zeroes and/or small values. To overcome this problem, we recommend using the analytical limits of LMDI terms in cases of zero values. These limits can be substituted for entire computational loops, so that in addition to providing the correct decomposition result, this improved procedure also drastically reduces computation times.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Policy - Volume 34, Issue 12, August 2006, Pages 1326–1331
نویسندگان
, ,