Mathematically the arc-length method can be viewed as the trace of a single equilibrium curve in a space spanned by the nodal displacement variables and the total load factor.

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In the main-process, the coordinates of nodal points on part outline curve can be calculated by replacing this curve with a linear approximation. The codes expressed in NC program form which can be recognized by NC machine tool are got according to the coordinates of these nodal points in the post-process.

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This paper presents the basic concept of the production systematic analysis gas well and the basic principle and method in nodal point analysis of the gas well; Give the result of deep going analysis as well as research on the gas flow rule in the wellbore,performance relationships curve of inflow and outflow as well as the curve of pure gas well sand liquid production on gas wells.

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In this paper, taking nodal injection power and voltage operation curve of PV node as foundation, according to the basic property of numerical characteristics of random variables and relevant equations for probabilistic load flow calculation the expectations of nodal current, reactive power at PV node and power at balancing node as well as computing formula of covariances are derived by different methods; the computation accuracy of various algorithms are compared and analyzed.

文章以節(jié)點注入功率和PV節(jié)點電壓運行曲線為基礎(chǔ)人人妻人人干，依據(jù)隨機變量數(shù)字特征的基本性質(zhì)和概率潮流計算的相關(guān)方程亚洲综合久久综合激情久久，分別采用不同的方法推導(dǎo)了節(jié)點電流、PV節(jié)點的無功功率及平衡節(jié)點功率的均值和協(xié)方差計算公式人人插人人透人人射人人色人人干，比較和分析了各種算法的計算精度久久黄片不卡。