Examples with Interval nars.language.Interval used on opensource projects

Example 1 with Interval

use of nars.language.Interval in project opennars by opennars.

the class PerceptionAccel method perceive.

public void perceive(DerivationContext nal) {
    // implement Peis idea here now
    // we start with length 2 compounds, and search for patterns which are one longer than the longest observed one
    boolean longest_result_derived_already = false;
    for (int Len = cur_maxlen + 1; Len >= 2; Len--) {
        // ok, this is the length we have to collect, measured from the end of event buffer
        // there is a interval term for every event
        Term[] relterms = new Term[2 * Len - 1];
        // measuring its distance to the next event, but for the last event this is obsolete
        // thus it are 2*Len-1] terms
        Task newEvent = eventbuffer.get(eventbuffer.size() - 1);
        TruthValue truth = newEvent.sentence.truth;
        Stamp st = new Stamp(nal.memory);
        ArrayList<Long> evBase = new ArrayList<Long>();
        int k = 0;
        for (int i = 0; i < Len; i++) {
            // we go till to the end of the event buffer
            int j = eventbuffer.size() - 1 - (Len - 1) + i;
            if (j < 0) {
                // but the mechanism already looks for length 2 patterns on the occurence of the first event
                break;
            }
            Task current = eventbuffer.get(j);
            for (long l : current.sentence.stamp.evidentialBase) {
                evBase.add(l);
            }
            relterms[k] = current.sentence.term;
            if (i != Len - 1) {
                // if its not the last one, then there is a next one for which we have to put an interval
                truth = TruthFunctions.deduction(truth, current.sentence.truth);
                Task next = eventbuffer.get(j + 1);
                relterms[k + 1] = new Interval(next.sentence.getOccurenceTime() - current.sentence.getOccurenceTime());
            }
            k += 2;
        }
        long[] evB = new long[evBase.size()];
        int u = 0;
        for (long l : evBase) {
            evB[u] = l;
            u++;
        }
        st.baseLength = evB.length;
        st.evidentialBase = evB;
        boolean eventBufferDidNotHaveSoMuchEvents = false;
        for (int i = 0; i < relterms.length; i++) {
            if (relterms[i] == null) {
                eventBufferDidNotHaveSoMuchEvents = true;
            }
        }
        if (eventBufferDidNotHaveSoMuchEvents) {
            continue;
        }
        // decide on the tense of &/ by looking if the first event happens parallel with the last one
        // Todo refine in 1.6.3 if we want to allow input of difference occurence time
        boolean after = newEvent.sentence.stamp.after(eventbuffer.get(eventbuffer.size() - 1 - (Len - 1)).sentence.stamp, Parameters.DURATION);
        // critical part: (not checked for correctness yet):
        // we now have to look at if the first half + the second half already exists as concept, before we add it
        Term[] firstHalf;
        Term[] secondHalf;
        if (relterms[Len - 1] instanceof Interval) {
            // the middle can be a interval, for example in case of a,+1,b , in which case we dont use it
            // so we skip the middle here
            firstHalf = new Term[Len - 1];
            // as well as here
            secondHalf = new Term[Len - 1];
            // make index mapping easier by counting
            int h = 0;
            for (int i = 0; i < Len - 1; i++) {
                firstHalf[i] = relterms[h];
                h++;
            }
            // we have to overjump the middle element this is why
            h += 1;
            for (int i = 0; i < Len - 1; i++) {
                secondHalf[i] = relterms[h];
                h++;
            }
        } else {
            // it is a event so its fine
            // 2*Len-1 in total
            firstHalf = new Term[Len];
            // but the middle is also used in the second one
            secondHalf = new Term[Len];
            // make index mapping easier by counting
            int h = 0;
            for (int i = 0; i < Len; i++) {
                firstHalf[i] = relterms[h];
                h++;
            }
            // we have to use the middle twice this is why
            h--;
            for (int i = 0; i < Len; i++) {
                secondHalf[i] = relterms[h];
                h++;
            }
        }
        Term firstC = Conjunction.make(firstHalf, after ? ORDER_FORWARD : ORDER_CONCURRENT);
        Term secondC = Conjunction.make(secondHalf, after ? ORDER_FORWARD : ORDER_CONCURRENT);
        Concept C1 = nal.memory.concept(firstC);
        Concept C2 = nal.memory.concept(secondC);
        if (C1 == null || C2 == null) {
            if (debugMechanism) {
                System.out.println("one didn't exist: " + firstC.toString() + " or " + secondC.toString());
            }
            // the components were not observed, so don't allow creating this compound
            continue;
        }
        if (C1.getPriority() < partConceptsPrioThreshold || C2.getPriority() < partConceptsPrioThreshold) {
            // too less priority
            continue;
        }
        Conjunction C = (Conjunction) Conjunction.make(relterms, after ? ORDER_FORWARD : ORDER_CONCURRENT);
        // importance "summation"
        Sentence S = new Sentence(C, Symbols.JUDGMENT_MARK, truth, st);
        Task T = new Task(S, new BudgetValue(BudgetFunctions.or(C1.getPriority(), C2.getPriority()), Parameters.DEFAULT_JUDGMENT_DURABILITY, truth), true);
        if (debugMechanism) {
            System.out.println("success: " + T.toString());
        }
        if (longest_result_derived_already) {
            T.setElemOfSequenceBuffer(false);
        }
        longest_result_derived_already = true;
        // lets make the new event the parent task, and derive it
        nal.derivedTask(T, false, false, false);
    }
}

Example 2 with Interval

use of nars.language.Interval in project opennars by opennars.

the class GlobalAnticipation method temporalPredictionsAdapt.

// check all predictive statements, match them with last events
public void temporalPredictionsAdapt(DerivationContext nal) {
    if (TEMPORAL_PREDICTION_FEEDBACK_ACCURACY_DIV == 0.0f) {
        return;
    }
    ArrayList<Task> lastEvents = new ArrayList<Task>();
    for (Task stmLast : stm) {
        lastEvents.add(stmLast);
    }
    if (lastEvents.isEmpty()) {
        return;
    }
    final long duration = Parameters.DURATION;
    ArrayList<Task> derivetasks = new ArrayList<Task>();
    for (final Task c : current_tasks) {
        // a =/> b or (&/ a1...an) =/> b
        boolean concurrent_conjunction = false;
        Term[] args = new Term[1];
        Implication imp = (Implication) c.sentence.term.clone();
        boolean concurrent_implication = imp.getTemporalOrder() == TemporalRules.ORDER_CONCURRENT;
        args[0] = imp.getSubject();
        if (imp.getSubject() instanceof Conjunction) {
            Conjunction conj = (Conjunction) imp.getSubject();
            if (!conj.isSpatial) {
                if (conj.temporalOrder == TemporalRules.ORDER_FORWARD || conj.temporalOrder == TemporalRules.ORDER_CONCURRENT) {
                    concurrent_conjunction = conj.temporalOrder == TemporalRules.ORDER_CONCURRENT;
                    // in case of &/ this are the terms
                    args = conj.term;
                }
            }
        }
        int i = 0;
        boolean matched = true;
        int off = 0;
        long expected_time = lastEvents.get(0).sentence.getOccurenceTime();
        for (i = 0; i < args.length; i++) {
            // handling of intervals:
            if (args[i] instanceof Interval) {
                if (!concurrent_conjunction) {
                    expected_time += ((Interval) args[i]).time;
                }
                off++;
                continue;
            }
            if (i - off >= lastEvents.size()) {
                break;
            }
            if (!Variables.hasSubstitute(Symbols.VAR_INDEPENDENT, args[i], lastEvents.get(i - off).sentence.term)) {
                // it didnt match, instead sth different unexpected happened
                // whether intermediate events should be tolerated or not was a important question when considering this,
                matched = false;
                // if it should be allowed, the sequential match does not matter only if the events come like predicted.
                break;
            } else {
                if (lastEvents.get(i - off).sentence.truth.getExpectation() <= 0.5f) {
                    // it matched according to sequence, but is its expectation bigger than 0.5? todo: decide how truth values of the expected events
                    // it didn't happen
                    matched = false;
                    break;
                }
                long occurence = lastEvents.get(i - off).sentence.getOccurenceTime();
                boolean right_in_time = Math.abs(occurence - expected_time) < ((double) duration) / TEMPORAL_PREDICTION_FEEDBACK_ACCURACY_DIV;
                if (!right_in_time) {
                    // it matched so far, but is the timing right or did it happen when not relevant anymore?
                    matched = false;
                    break;
                }
            }
            if (!concurrent_conjunction) {
                expected_time += duration;
            }
        }
        if (concurrent_conjunction && !concurrent_implication) {
            // implication is not concurrent
            // so here we have to add duration
            expected_time += duration;
        } else if (!concurrent_conjunction && concurrent_implication) {
            expected_time -= duration;
        }
        // ok it matched, is the consequence also right?
        if (matched && lastEvents.size() > args.length - off) {
            long occurence = lastEvents.get(args.length - off).sentence.getOccurenceTime();
            boolean right_in_time = Math.abs(occurence - expected_time) < ((double) duration) / TEMPORAL_PREDICTION_FEEDBACK_ACCURACY_DIV;
            if (right_in_time && Variables.hasSubstitute(Symbols.VAR_INDEPENDENT, imp.getPredicate(), lastEvents.get(args.length - off).sentence.term)) {
                // it matched and same consequence, so positive evidence
                // c.sentence.truth=TruthFunctions.revision(c.sentence.truth, new TruthValue(1.0f,Parameters.DEFAULT_JUDGMENT_CONFIDENCE));
                Sentence s2 = new Sentence(c.sentence.term.clone(), Symbols.JUDGMENT_MARK, new TruthValue(1.0f, Parameters.DEFAULT_JUDGMENT_CONFIDENCE), new Stamp(nal.memory));
                Task t = new Task(s2, new BudgetValue(Parameters.DEFAULT_JUDGMENT_PRIORITY, Parameters.DEFAULT_JUDGMENT_DURABILITY, s2.truth), true);
                derivetasks.add(t);
            } else {
                // it matched and other consequence, so negative evidence
                // c.sentence.truth=TruthFunctions.revision(c.sentence.truth, new TruthValue(0.0f,Parameters.DEFAULT_JUDGMENT_CONFIDENCE));
                Sentence s2 = new Sentence(c.sentence.term.clone(), Symbols.JUDGMENT_MARK, new TruthValue(0.0f, Parameters.DEFAULT_JUDGMENT_CONFIDENCE), new Stamp(nal.memory));
                Task t = new Task(s2, new BudgetValue(Parameters.DEFAULT_JUDGMENT_PRIORITY, Parameters.DEFAULT_JUDGMENT_DURABILITY, s2.truth), true);
                derivetasks.add(t);
            }
        // todo use derived task with revision instead
        }
    }
    for (Task t : derivetasks) {
        if (nal.derivedTask(t, false, false, false)) {
            boolean debug = true;
        }
    }
    ArrayList<Task> toDelete = new ArrayList<Task>();
    for (Task t : current_tasks) {
        Concept w = nal.memory.concept(t.sentence.term);
        if (w == null) {
            // concept does not exist anymore, delete
            toDelete.add(t);
        }
    }
    for (Task t : toDelete) {
        current_tasks.remove(t);
    }
}

Example 3 with Interval

use of nars.language.Interval in project opennars by opennars.

the class Memory method conceptualize.

/**
 * Get the Concept associated to a Term, or create it.
 *
 *   Existing concept: apply tasklink activation (remove from bag, adjust budget, reinsert)
 *   New concept: set initial activation, insert
 *   Subconcept: extract from cache, apply activation, insert
 *
 * If failed to insert as a result of null bag, returns null
 *
 * A displaced Concept resulting from insert is forgotten (but may be stored in optional  subconcept memory
 *
 * @param term indicating the concept
 * @return an existing Concept, or a new one, or null
 */
public Concept conceptualize(final BudgetValue budget, Term term) {
    if (term instanceof Interval) {
        return null;
    }
    term = CompoundTerm.replaceIntervals(term);
    // see if concept is active
    Concept concept = concepts.take(term);
    if (concept == null) {
        // create new concept, with the applied budget
        concept = new Concept(budget, term, this);
        // if (memory.logic!=null)
        // memory.logic.CONCEPT_NEW.commit(term.getComplexity());
        emit(Events.ConceptNew.class, concept);
    } else if (concept != null) {
        // apply budget to existing concept
        // memory.logic.CONCEPT_ACTIVATE.commit(term.getComplexity());
        BudgetFunctions.activate(concept.budget, budget, BudgetFunctions.Activating.TaskLink);
    } else {
        // unable to create, ex: has variables
        return null;
    }
    Concept displaced = concepts.putBack(concept, cycles(param.conceptForgetDurations), this);
    if (displaced == null) {
        // added without replacing anything
        return concept;
    } else if (displaced == concept) {
        // not able to insert
        conceptRemoved(displaced);
        return null;
    } else {
        conceptRemoved(displaced);
        return concept;
    }
}

Example 4 with Interval

use of nars.language.Interval in project opennars by opennars.

the class CompositionalRules method decomposeCompound.

/**
 * {<(S|P) ==> M>, <P ==> M>} |- <S ==> M>
 *
 * @param implication The implication term to be decomposed
 * @param componentCommon The part of the implication to be removed
 * @param term1 The other term in the contentInd
 * @param index The location of the shared term: 0 for subject, 1 for
 * predicate
 * @param compoundTask Whether the implication comes from the task
 * @param nal Reference to the memory
 */
private static void decomposeCompound(CompoundTerm compound, Term component, Term term1, int index, boolean compoundTask, int order, DerivationContext nal) {
    if ((compound instanceof Statement) || (compound instanceof ImageExt) || (compound instanceof ImageInt)) {
        return;
    }
    Term term2 = reduceComponents(compound, component, nal.mem());
    if (term2 == null) {
        return;
    }
    long delta = 0;
    while ((term2 instanceof Conjunction) && (((CompoundTerm) term2).term[0] instanceof Interval)) {
        Interval interval = (Interval) ((CompoundTerm) term2).term[0];
        delta += interval.time;
        term2 = ((CompoundTerm) term2).setComponent(0, null, nal.mem());
    }
    Task task = nal.getCurrentTask();
    Sentence sentence = task.sentence;
    Sentence belief = nal.getCurrentBelief();
    Statement oldContent = (Statement) task.getTerm();
    TruthValue v1, v2;
    if (compoundTask) {
        v1 = sentence.truth;
        v2 = belief.truth;
    } else {
        v1 = belief.truth;
        v2 = sentence.truth;
    }
    TruthValue truth = null;
    Term content;
    if (index == 0) {
        content = Statement.make(oldContent, term1, term2, order);
        if (content == null) {
            return;
        }
        if (oldContent instanceof Inheritance) {
            if (compound instanceof IntersectionExt) {
                truth = reduceConjunction(v1, v2);
            } else if (compound instanceof IntersectionInt) {
                truth = reduceDisjunction(v1, v2);
            } else if ((compound instanceof SetInt) && (component instanceof SetInt)) {
                truth = reduceConjunction(v1, v2);
            } else if ((compound instanceof SetExt) && (component instanceof SetExt)) {
                truth = reduceDisjunction(v1, v2);
            } else if (compound instanceof DifferenceExt) {
                if (compound.term[0].equals(component)) {
                    truth = reduceDisjunction(v2, v1);
                } else {
                    truth = reduceConjunctionNeg(v1, v2);
                }
            }
        } else if (oldContent instanceof Implication) {
            if (compound instanceof Conjunction) {
                truth = reduceConjunction(v1, v2);
            } else if (compound instanceof Disjunction) {
                truth = reduceDisjunction(v1, v2);
            }
        }
    } else {
        content = Statement.make(oldContent, term2, term1, order);
        if (content == null) {
            return;
        }
        if (oldContent instanceof Inheritance) {
            if (compound instanceof IntersectionInt) {
                truth = reduceConjunction(v1, v2);
            } else if (compound instanceof IntersectionExt) {
                truth = reduceDisjunction(v1, v2);
            } else if ((compound instanceof SetExt) && (component instanceof SetExt)) {
                truth = reduceConjunction(v1, v2);
            } else if ((compound instanceof SetInt) && (component instanceof SetInt)) {
                truth = reduceDisjunction(v1, v2);
            } else if (compound instanceof DifferenceInt) {
                if (compound.term[1].equals(component)) {
                    truth = reduceDisjunction(v2, v1);
                } else {
                    truth = reduceConjunctionNeg(v1, v2);
                }
            }
        } else if (oldContent instanceof Implication) {
            if (compound instanceof Disjunction) {
                truth = reduceConjunction(v1, v2);
            } else if (compound instanceof Conjunction) {
                truth = reduceDisjunction(v1, v2);
            }
        }
    }
    if (truth != null) {
        BudgetValue budget = BudgetFunctions.compoundForward(truth, content, nal);
        if (delta != 0) {
            long baseTime = task.sentence.getOccurenceTime();
            if (baseTime != Stamp.ETERNAL) {
                baseTime += delta;
                nal.getTheNewStamp().setOccurrenceTime(baseTime);
            }
        }
        // (allow overlap), a form of detachment
        nal.doublePremiseTask(content, truth, budget, false, true);
    }
}

Example 5 with Interval

use of nars.language.Interval in project opennars by opennars.

the class CompositionalRules method decomposeStatement.

/**
 * {(||, S, P), P} |- S {(&&, S, P), P} |- S
 *
 * @param implication The implication term to be decomposed
 * @param componentCommon The part of the implication to be removed
 * @param compoundTask Whether the implication comes from the task
 * @param nal Reference to the memory
 */
static void decomposeStatement(CompoundTerm compound, Term component, boolean compoundTask, int index, DerivationContext nal) {
    boolean isTemporalConjunction = (compound instanceof Conjunction) && !((Conjunction) compound).isSpatial;
    if (isTemporalConjunction && (compound.getTemporalOrder() == TemporalRules.ORDER_FORWARD) && (index != 0)) {
        return;
    }
    long occurrence_time = nal.getTheNewStamp().getOccurrenceTime();
    if (isTemporalConjunction && (compound.getTemporalOrder() == TemporalRules.ORDER_FORWARD)) {
        if (!nal.getCurrentTask().sentence.isEternal() && compound.term[index + 1] instanceof Interval) {
            long shift_occurrence = ((Interval) compound.term[1]).time;
            occurrence_time = nal.getCurrentTask().sentence.getOccurenceTime() + shift_occurrence;
        }
    }
    Task task = nal.getCurrentTask();
    Sentence taskSentence = task.sentence;
    Sentence belief = nal.getCurrentBelief();
    Term content = reduceComponents(compound, component, nal.mem());
    if (content == null) {
        return;
    }
    TruthValue truth = null;
    BudgetValue budget;
    if (taskSentence.isQuestion() || taskSentence.isQuest()) {
        budget = BudgetFunctions.compoundBackward(content, nal);
        nal.getTheNewStamp().setOccurrenceTime(occurrence_time);
        nal.doublePremiseTask(content, truth, budget, false, false);
        // special inference to answer conjunctive questions with query variables
        if (taskSentence.term.hasVarQuery()) {
            Concept contentConcept = nal.mem().concept(content);
            if (contentConcept == null) {
                return;
            }
            Sentence contentBelief = contentConcept.getBelief(nal, task);
            if (contentBelief == null) {
                return;
            }
            Task contentTask = new Task(contentBelief, task.budget, false);
            nal.setCurrentTask(contentTask);
            Term conj = Conjunction.make(component, content);
            truth = intersection(contentBelief.truth, belief.truth);
            budget = BudgetFunctions.compoundForward(truth, conj, nal);
            nal.getTheNewStamp().setOccurrenceTime(occurrence_time);
            nal.doublePremiseTask(conj, truth, budget, false, false);
        }
    } else {
        TruthValue v1, v2;
        if (compoundTask) {
            v1 = taskSentence.truth;
            v2 = belief.truth;
        } else {
            v1 = belief.truth;
            v2 = taskSentence.truth;
        }
        if (compound instanceof Conjunction) {
            if (taskSentence.isGoal()) {
                if (compoundTask) {
                    truth = intersection(v1, v2);
                } else {
                    return;
                }
            } else {
                // isJudgment
                truth = reduceConjunction(v1, v2);
            }
        } else if (compound instanceof Disjunction) {
            if (taskSentence.isGoal()) {
                if (compoundTask) {
                    truth = reduceConjunction(v2, v1);
                } else {
                    return;
                }
            } else {
                // isJudgment
                truth = reduceDisjunction(v1, v2);
            }
        } else {
            return;
        }
        budget = BudgetFunctions.compoundForward(truth, content, nal);
    }
    nal.getTheNewStamp().setOccurrenceTime(occurrence_time);
    nal.doublePremiseTask(content, truth, budget, false, false);
}