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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
The relative volume of lung viewed by each detector was provided by closed circuit equilibrium with Xe-133.
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| | In the paper, puts forward a new method to analyze the progressive stability of higher- dimension non-linear circuit equilibrium point. This method takes the matrix resolving as a tool, combined with criterion of progressive stability and determines the equilibrium point by stability of matrix resolving. Compared with the current LIYAPUNOV method, this one has many advan- tages: it is not necessary to judge uniqueness of the equilibrium point; it is direct; and while the dimension nu... | | 提出了一种新的分析具有分解形式的高维非线性电路平衡点全局渐近稳定的方法。 这种方法以矩阵分解为工具,结合平衡点的渐近稳定判据,用分解矩阵的稳定性决定平衡点的 全局渐近稳定性。与目前该问题所采用的LIYAPUNOV直接法相比,该方法具有无须判断平衡 点的唯一性,判别方法直接明了等优点。电路维数越大时,此方法越有其优势。同时,该方法 对于其他形式的非线性系统的分析,也有重要的启发性及应用价值。 | | 文摘来源 | | Based on optimization principle,regarding electric currents and electric potential as design variables, circuit equilibrium relation as objective function, a frame-objective function optimization method of arbitrary complicated direct circuit analyses is proposed. Varying with input condition, design variables are rationally allocated and sorted to form objective function. It can be used to complete rapidly analysis and calculation of various circuit constitute. Effectiveness and fea... | | 应用最优化基本原理 ,提出了以支路电流和节点电位为设计变量 ,以电路平衡条件为目标函数的任意复杂电路分析的框架式目标函数优化程序方法。该方法所构造的框架式目标函数 ,将根据具体电路输入参数 ,合理地设计变量分配与排序和完成目标函数的累积运算 ,可快速实现任意组合电路的分析计算。电路问题算例验证了这种程序方法的可行性和通用性。 | | 文摘来源 | | The value of equilibrium equation is zero derived from the equivalent circuit equation of the primary and second winding during normal operation conditions, magnetizing inrush and external fault. It is not equal to zero during an internal winding fault, ground fault and phase fault. A new transformer protection algorithm based on the equivalent circuit equilibrium equation is described in this paper. For a single-phase and a three-phase Y/Y transformer, the criterion functions are de... | | 利用在正常运行及励磁涌流状态下,由原副边绕组回路方程得到的回路平衡方程值为零,而在内部故障状态下回路平衡方程值不再为零这一特征,构成了基于回路方程的变压器保护原理,并推导出应用于单相变压器、三相Y/Y、 Y/△接法变压器的保护动作方程。由于变压器绕组漏感参数难以求取,且在运行过程中绕组变形将会导致漏感参数发生变化,文中采用最小二乘算法对变压器漏感参数进行实时在线估算,以提高算法灵敏度。动模试验表明:该算法原理清晰,能够不受励磁涌流的影响,快速可靠地识别变压器各种故障,且特征明显,其动作门坎有较大的裕度。 | | 文摘来源 | |   |
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