• 제목/요약/키워드: Daoshu

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《典經》中的道術思想來源與轉化運用研究 (The Study of the Origin and Transformation of the Arts of the Dao in The Canonical Scripture)

  • 謝聰輝
    • 대순사상논총
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    • 제36집
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    • pp.267-298
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    • 2020
  • 本文以〈《典經》中的道術思想來源與轉化運用研究〉為題, 主要採取溯源與比較的方法, 希望能較清楚梳理大巡真理會關於道術部分核心的思想淵源, 與其經實踐工夫轉變運用的巧妙智慧。除前言與結語兩節外, 第二節〈運度定數 : 《典經》天地公事與道教開劫度人比較〉中, 析論會造成否劫的原因, 除了歸諸於自古以來神明與人類的冤結怨深有關之外, 主要跟中國自古自然曆數週期的運行思想有關。而在調整度數的天地公事上, 姜聖上帝是主控且親力親為, 信徒只是配合的輔助角色 ; 道教則更強調經典的神聖經德功能, 以及需要負責的高真集體參與運作, 而不是至高神元始天尊一人所能獨為。第三節 〈道術儀式的來源與運用特質〉分析上, 除探究了五方將, 二十四將, 二十八將與四十八將的來源意涵外, 也論證了《典經》 中一部分道術經咒與道教神霄雷法的關係, 最後則提出了其中的遁甲步罡儀式與六壬式盤占卜操作有關的看法。

A Fast Sorting Strategy Based on a Two-way Merge Sort for Balancing the Capacitor Voltages in Modular Multilevel Converters

  • Zhao, Fangzhou;Xiao, Guochun;Liu, Min;Yang, Daoshu
    • Journal of Power Electronics
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    • 제17권2호
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    • pp.346-357
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    • 2017
  • The Modular Multilevel Converter (MMC) is particularly attractive for medium and high power applications such as High-Voltage Direct Current (HVDC) systems. In order to reach a high voltage, the number of cascaded submodules (SMs) is generally very large. Thus, in the applications with hundreds or even thousands of SMs such as MMC-HVDCs, the sorting algorithm of the conventional voltage balancing strategy is extremely slow. This complicates the controller design and increases the hardware cost tremendously. This paper presents a Two-Way Merge Sort (TWMS) strategy based on the prediction of the capacitor voltages under ideal conditions. It also proposes an innovative Insertion Sort Correction for the TWMS (ISC-TWMS) to solve issues in practical engineering under non-ideal conditions. The proposed sorting methods are combined with the features of the MMC-HVDC control strategy, which significantly accelerates the sorting process and reduces the implementation efforts. In comparison with the commonly used quicksort algorithm, it saves at least two-thirds of the sorting execution time in one arm with 100 SMs, and saves more with a higher number of SMs. A 501-level MMC-HVDC simulation model in PSCAD/EMTDC has been built to verify the validity of the proposed strategies. The fast speed and high efficiency of the algorithms are demonstrated by experiments with a DSP controller (TMS320F28335).