Modified Biphasic Mixture Model and Its Numerical Penalty Formulation

ＭｏｄｉｆｉｅｄＢｉｐｈａｓｉｃＭｉｘｔｕｒｅＭｏｄｅｌａｎｄＩｔｓＮｕｍｅｒｉｃａｌＰｅｎａｌｔｙＦｏｒｍｕｌａｔｉｏｎ＊ＬｕＭｉｎｇｗａｎ（陆明万），ＨｕａｎｇＤｏｎｇｔａｏ（黄东涛），ＸｕｅＷｅｉｍｉｎ（薛伟民），Ｙ．Ｃ．Ｈｏｎ（韩耀宗）＋，Ａ...     

激发极化法对深部隐伏矿体预测研究

激发极化法是我国金属矿电法勘探的主要手段。在此以激发极化法在某铜矿区为例,运用激电法中的中梯装置和三级装置,对深部隐伏矿体预测,通过实测数据的分析,解释异常成因。     

水质总氮测定中无氨水的替代用水研究

国标《GB/T11894-89》规定,测定总氮时需要使用无氨水,而制备无氨水费时费力,成本高,因此很不适合大批量样品的分析。该研究使用氨氮快速测定仪分别对一次蒸馏水、新制双蒸水、无氨水等多种不同的实验用水内的氨氮含量进行了实测,结果表明：二次重蒸馏水（新制）的氨氮含量（0.80mg/L）低,接近无氨水（0.70～0.90mg/L）中实测的氨氮含量。研究使用该替代用水进行了国标总氮测定试验,经总氮空白实验验证,结果满足国标总氮测定中对空白值的要求,即A≤0.030,同时,标准曲线线性相关性系数R2=0.9987。运用该试验用水进行实测标样和水样中氨氮的含量,结果准确、精密度良好,完全能满足实际测定的要求,因此具有实际应用的价值。     

Efficiency and Feasibility of an Integrated Algorithm for Distributed Hydrological Model Calibration

Increasing complexity of distributed hydrological model （DHM） has lowered the efficiency of convergence.In this study,global sensitivity analysis （SA） was introduced by combining multiobjective （MO） optimization for DHM calibration.Latin Hypercube-once at a time （LH-OAT） was adopted in global parameter SA to obtain relative sensitivity of model parameter,which can be categorized into different sensitivity levels.Two comparative study cases were conducted to present the efficiency and feasibility by combining SA with MO（SA-MO）.WetSpa model with non-dominated sorting genetic algorithm-Ⅱ （NSGA-Ⅱ） algorithm and EasyDHM model with multi-objective sequential complex evolutionary metropolis-uncertainty analysis （MOSCEM-UA）algorithm were adopted to demonstrate the general feasibility of combining SA in optimization.Results showed that the LH-OAT was globally effective in selecting high sensitivity parameters.It proves that using parameter from high sensitivity groups results in higher convergence efficiency.Study case Ⅰ showed a better Pareto front distribution and convergence compared with model calibration without SA.Study case Ⅱ indicated a more efficient convergence of parameters in sequential evolution of MOSCEM-UA under the same iteration.It indicates that SA-MO is feasible and efficient for high dimensional DHM calibration.