Topological Efficiency Index

2020 ◽  
pp. 437-445
Author(s):  
Ottorino Ori
Keyword(s):  
Efficiency Index ◽  
Topological Efficiency

Atlas of ρ, ρE, and TM–EC for Fullerenes Isomers

2017 ◽  
pp. 615-656
Author(s):  
Fatemeh Koorepazan-Moftakhar ◽  
Ali Reza Ashrafi ◽  
Ottorino Ori ◽  
Mihai V. Putz
Keyword(s):  
Mathematical Models ◽  
Connected Graph ◽  
Efficiency Index ◽  
Fullerene Graph ◽  
Eccentricity Index ◽  
Carbon Molecules ◽  
Topological Efficiency

A fullerene graph is a cubic, planar and 3-connected graph that its faces are pentagons and hexagons. These graphs are the best mathematical models for fullerene molecules, which are polyhedral carbon molecules with atoms arranged in pentagons and hexagons. The topological efficiency index ?, the parameter ?E and the Timisoara-eccentricity index (TM-EC)are three recent parameters for studying fullerenes. The aim of this chapter is to report these parameters for fullerenes. The examples given includes at most 50 carbon atoms.

EFISIENSI PENGGUNAAN LAHAN DAN PUPUK DALAM USAHATANI PADI DI KOTA BAU-BAU PROPINSI SULAWESI TENGGARA

2010 ◽  
Vol 12 (2) ◽  
pp. 153
Author(s):  
Sulhan
Keyword(s):  
Efficiency Index ◽  
Marginal Value

Penelitian ini menggunakan metode survei dengan melibatkan 120 Rumah Tangga Petani (RTP) yang ditentukan secara acak sederhana dari 170 RTP. Data yang dikumpulkan adalah tingkat penggunaan lahan dan pupuk urea pada setiap RTP. Alat analisis yang digunakan adalah Fungsi Produksi Cobb-Douglas dengan tujuan untuk mendapatkan tingkat elastisitas penggunaan lahan dan pupuk urea (bi). Selanjutnya untuk mengetahui tingkat efisiensi penggunaan lahan dan pupuk urea digunakan alat analisis Efficiency Index (EI). EI adalah rasio antara Marginal Value Product (MVP) dan Marginal Factor Cost (MFC). Jika EI = 1, maka tingkat penggunaan lahan dan pupuk urea efisien; jika EI > 0, tingkat penggunan lahan dan pupuk urea belum efisien; dan jika EI < 0, tingkat penggunaan lahan dan pupuk urea tidak efisien. Hasil penelitian menunjukkan bahwa penggunaan lahan dan pupuk urea dalam usahatani padi di Bau-Bau memiliki EI > 1 yang berarti bahwa tingkat penggunaan kedua faktor produksi tersebut masih kurang karena dari setiap penambahan satu unit faktor produksi tersebut akan memberikan penerimaan yang lebih besar daripada besarnya biaya yang dikeluarkan. Oleh karenanya penggunaan kedua faktor produksi tersebut belum efisien sehingga disarankan untuk ditingkatkan penggunaannya.

An Analysis of Actual Energy Savings in an Indian Cement Industry Through an Energy Efficiency Index

2012 ◽  
Vol 9 (8) ◽  
pp. 829-840 ◽  
Author(s):  
R. Saidur ◽  
M. T. Sambandam ◽  
M. Hasanuzzaman ◽  
D. Devaraj ◽  
S. Rajakarunakaran
Keyword(s):  
Energy Efficiency ◽  
Energy Savings ◽  
Efficiency Index ◽  
Cement Industry

An Efficient Sixth-Order Convergent Newton-Type Iterative Method for Nonlinear Equations

2012 ◽  
Vol 220-223 ◽  
pp. 2585-2588
Author(s):  
Zhong Yong Hu ◽  
Fang Liang ◽  
Lian Zhong Li ◽  
Rui Chen
Keyword(s):  
Iterative Method ◽  
Nonlinear Equations ◽  
Newton’S Method ◽  
Newton's Method ◽  
Efficiency Index ◽  
Sixth Order ◽  
Type Method ◽  
Second Derivatives ◽  
Better Than

In this paper, we present a modified sixth order convergent Newton-type method for solving nonlinear equations. It is free from second derivatives, and requires three evaluations of the functions and two evaluations of derivatives per iteration. Hence the efficiency index of the presented method is 1.43097 which is better than that of classical Newton’s method 1.41421. Several results are given to illustrate the advantage and efficiency the algorithm.

scholarly journals Use of the Sustainable Mobility Efficiency Index (SMEI) for Enhancing the Sustainable Urban Mobility in Greek Cities

2021 ◽  
Vol 13 (4) ◽  
pp. 1709
Author(s):  
Maria Morfoulaki ◽  
Jason Papathanasiou
Keyword(s):  
Multicriteria Analysis ◽  
Efficiency Index ◽  
Urban Mobility ◽  
Specific Procedure ◽  
Sustainable Mobility ◽  
European Cities ◽  
Step Procedure ◽  
Directorate General ◽  
Alternative Measures ◽  
Sustainable Urban Mobility

Since 2013, the European cities have been encouraged to develop local Sustainable Urban Mobility Plans (SUMPs) according to the specific procedure that was launched by the Directorate-General for Mobility and Transport (DG Move) and updated in 2019. One of the most critical steps in this 12-step procedure is the assessment—with specific criteria—of all the alternative measures and infrastructure, which will be optimally combined, in order to better satisfy the problems and the achieve the vision of each area. The aim of the current work is to present the development and implementation of a methodological framework based on the use of multicriteria analysis. The framework targets the capturing of opinions of the relevant local experts in order to evaluate alternative sustainable mobility measures, and also prioritize them using the Sustainable Mobility Efficiency Index (SMEI).

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