Stability Metric Based on Sensitivity Analysis Applied to Electrical Repowering System

Stability metrics are used to quantify a system’s ability to maintain equilibrium under disturbances. We did not identify the proposition of a stability metric using sensitivity analysis within the literature. This work proposes a system stability metric and its application to an electrical repowering system. The methodology for applying the proposed metric comprises: (i) system parameters sensitivity analysis and spider diagram construction, (ii) determining the array containing the line segments inclination angles of each spider diagram curve, and (iii) stability calculation using the array mean and maximum inclination value of a line segment. After simulating the model built for the electrical repowering system and applying the methodology, we obtain results regarding the sensitivity indices and stability values of system inputs relative to their outputs, considering the original system and with reduced parameters. Using the stability study, it was possible to determine different stability categories for the system parameters, which indicates the need for different analysis levels.

Канцэптуальная мапа беларускага маўленчага этыкету

The pragmatics and semantics of speech acts of greeting, farewell, gratitude, forgiveness, wishes, requests, expressions of politeness and congratulations are presented in the form of a mental map (intellectual map or mind map) and described in the article. This map is considered to be a type of concept map or spider diagram. A similar idea of information visualization was found in antiquity, although its usage in educational processes was fi rst recorded in the 1970s as the «idea of the sun’s explosion», as well as Tony Busen’s «radial tree» or «intellectual map» (1974). It was at that time that the idea that such a refl ection of the material increases the effectiveness of learning up to 15% was suggested.

Pembangunan Indeks Kinerja Industri

This research develops Industrial Performance Index and shows annual performance index among industries through all and each indicator from 2004 to 2007. There are three criteria and 19 indicators, (1) output (value added, wage, firm), (2) production factor (labor, capital, and technological progress), (3) production cost (labor and capital productivity, material and energy efficiency). The result shows the best performance industry, (1) in 2007 is transportation industry excluded four or more wheel vehicle, (2) in 2006 is recycling industry, (3) in 2005 is machinery and office equipment industry, (4) in 2004 is food and beverage industry.Keywords: Industrial Performance Index, Spider Diagram AbstrakStudi ini membangun indeks kinerja industri relatif subsektor industri per-indikator dan subsektor industri unggulan pada periode tertentu. Ada tiga ukuran dan sembilan belas indikator yang dipilih yaitu, output (nilai tambah, upah, jumlah perusahaan), faktor produksi (tenaga kerja, barang modal, dan kemajuan teknologi), dan biaya produksi (produktivitas tenaga kerja dan barang modal, efisiensi penggunaan material dan energi). Hasil perhitungan memperlihatkan subsektor industri unggulan pada tahun: (i) 2007 adalah industri alat angkutan, selain kendaraan bermotor roda empat atau lebih, (ii) 2006 adalah industri daur ulang, (iii) 2005 adalah industri mesin dan peralatan kantor, akuntansi dan pengolahan data, dan (iv) 2004 adalah industri makanan dan minuman.Kata kunci: Indeks Kinerja Industri, Spider Diagram