106 lines
4.2 KiB
C#
106 lines
4.2 KiB
C#
using MembranePoreTester.Models;
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using System.Collections.Generic;
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using System.Linq;
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namespace MembranePoreTester.Helpers
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{
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public static class PoreDistributionAnalysis
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{
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public static double CalculateAveragePore(
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IEnumerable<DataPoint> points,
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string unit,
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TestLiquid liquid)
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{
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var sorted = points.OrderBy(p => p.Pressure).ToList();
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if (sorted.Count < 2) return 0;
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double[] pressures = sorted.Select(p => p.Pressure).ToArray();
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double[] dryFlows = sorted.Select(p => p.DryFlow).ToArray();
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double[] wetFlows = sorted.Select(p => p.WetFlow).ToArray();
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double halfDryFlow = dryFlows.Max() / 2.0;
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// 找到湿膜流量等于 halfDryFlow 的压力（交点）
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for (int i = 0; i < wetFlows.Length - 1; i++)
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{
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if ((wetFlows[i] <= halfDryFlow && wetFlows[i + 1] >= halfDryFlow) ||
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(wetFlows[i] >= halfDryFlow && wetFlows[i + 1] <= halfDryFlow))
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{
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double p = Interpolation.Linear(
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new[] { wetFlows[i], wetFlows[i + 1] },
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new[] { pressures[i], pressures[i + 1] },
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halfDryFlow);
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return PoreCalculator.PressureToPore(p, unit, liquid);
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}
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}
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return 0;
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}
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public static double CalculatePoreRangePercentage(
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IEnumerable<DataPoint> points,
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string unit,
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TestLiquid liquid,
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double lowerPore,
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double upperPore)
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{
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var sorted = points.OrderBy(p => p.Pressure).ToList();
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if (sorted.Count < 2) return 0;
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// 提取有效点（流量 > 0）
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var wetValid = sorted.Where(p => p.WetFlow > 0).Select(p => (Pressure: p.Pressure, Flow: p.WetFlow)).ToList();
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var dryValid = sorted.Where(p => p.DryFlow > 0).Select(p => (Pressure: p.Pressure, Flow: p.DryFlow)).ToList();
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if (wetValid.Count < 2 || dryValid.Count < 2) return 0;
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// 有效压力重叠区间
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double minPressure = Math.Max(wetValid.First().Pressure, dryValid.First().Pressure);
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double maxPressure = Math.Min(wetValid.Last().Pressure, dryValid.Last().Pressure);
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if (minPressure >= maxPressure) return 0;
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// 孔径转压力
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double pLower = PoreCalculator.PoreToPressure(upperPore, unit, liquid);
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double pUpper = PoreCalculator.PoreToPressure(lowerPore, unit, liquid);
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pLower = Math.Max(pLower, minPressure);
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pUpper = Math.Min(pUpper, maxPressure);
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if (pUpper <= pLower) return 0;
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// 在有效点集上插值
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double qWetLower = InterpolateOnValid(wetValid, pLower);
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double qDryLower = InterpolateOnValid(dryValid, pLower);
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double qWetUpper = InterpolateOnValid(wetValid, pUpper);
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double qDryUpper = InterpolateOnValid(dryValid, pUpper);
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if (qDryLower <= 0 || qDryUpper <= 0) return 0;
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double ratioLow = qWetLower / qDryLower;
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double ratioHigh = qWetUpper / qDryUpper;
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double result = (ratioHigh - ratioLow) * 100;
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return result < 0 ? 0 : result;
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}
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// 辅助插值函数：基于有效点列表（已按压力升序）
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private static double InterpolateOnValid(List<(double Pressure, double Flow)> validPoints, double pressure)
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{
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if (validPoints.Count == 0) return 0;
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if (pressure <= validPoints[0].Pressure) return validPoints[0].Flow;
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if (pressure >= validPoints[^1].Pressure) return validPoints[^1].Flow;
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for (int i = 0; i < validPoints.Count - 1; i++)
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{
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if (pressure >= validPoints[i].Pressure && pressure <= validPoints[i + 1].Pressure)
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{
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double p1 = validPoints[i].Pressure;
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double f1 = validPoints[i].Flow;
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double p2 = validPoints[i + 1].Pressure;
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double f2 = validPoints[i + 1].Flow;
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return f1 + (f2 - f1) * (pressure - p1) / (p2 - p1);
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}
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}
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return 0;
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}
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}
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} |