Mercurial > dive4elements > river
annotate artifacts/src/main/java/org/dive4elements/river/artifacts/sinfo/tkhcalculation/DischargeValuesFinder.java @ 8920:29442c03c6e3
d50 aggregation by median instead of arithmetic mean,
negative tkh replaced by 0
author | mschaefer |
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date | Thu, 01 Mar 2018 09:01:58 +0100 |
parents | d9dbf0b74bc2 |
children | b10f8415798c |
rev | line source |
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Refaktoring of flow depth calculation, extracting tkh part. First implementation of tkh calculation.
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1 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by |
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3 * Björnsen Beratende Ingenieure GmbH |
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4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt |
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Refaktoring of flow depth calculation, extracting tkh part. First implementation of tkh calculation.
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5 * |
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6 * This file is Free Software under the GNU AGPL (>=v3) |
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7 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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8 * documentation coming with Dive4Elements River for details. |
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9 */ |
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10 package org.dive4elements.river.artifacts.sinfo.tkhcalculation; |
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11 |
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12 import org.apache.commons.lang.math.DoubleRange; |
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13 import org.apache.commons.math.FunctionEvaluationException; |
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14 import org.apache.commons.math.analysis.UnivariateRealFunction; |
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15 import org.dive4elements.river.artifacts.model.QKms; |
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16 import org.dive4elements.river.artifacts.model.WKms; |
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17 import org.dive4elements.river.artifacts.model.WQKms; |
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18 import org.dive4elements.river.utils.DoubleUtil; |
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19 |
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20 /** |
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21 * @author Gernot Belger |
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22 */ |
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23 public final class DischargeValuesFinder { |
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24 |
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25 private final UnivariateRealFunction qInterpolator; |
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26 private final QKms qKms; |
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27 |
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28 /** |
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29 * Create an instance from a {@link WKms} object. If the given {@link WKms} is not a {@link WQKms}, a finder that always |
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30 * returns {@link Double#NaN} is returned. |
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31 */ |
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32 public static DischargeValuesFinder fromKms(final WKms wstKms) { |
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33 if (!(wstKms instanceof QKms)) { |
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34 return new DischargeValuesFinder(null); |
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35 } |
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36 |
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37 final QKms qKms = (QKms) wstKms; |
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38 |
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39 return new DischargeValuesFinder(qKms); |
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40 } |
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41 |
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42 public DischargeValuesFinder(final QKms qKms) { |
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43 this.qKms = qKms; |
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44 this.qInterpolator = qKms == null ? null : DoubleUtil.getLinearInterpolator(qKms.allKms(), qKms.allQs()); |
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45 } |
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46 |
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47 /** |
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48 * If this provider may return valid data at all. |
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49 */ |
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50 public boolean isValid() { |
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51 return this.qInterpolator != null; |
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52 } |
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53 |
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54 public DoubleRange getRange() { |
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55 return new DoubleRange(this.qKms.allQs().min(), this.qKms.allQs().max()); |
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56 } |
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57 |
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58 public double getDischarge(final double station) throws FunctionEvaluationException { |
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59 return this.qInterpolator.value(station); |
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60 } |
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61 } |