Roberto Sozzi (ARPA Lazio) Teodoro Georgiadis (CNR-IBIMET ...

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9 - TECNICHE PER L’OSSERVAZIONE DEL PBL.—————————————————————————⎯⎯——————————t i separati da un intervallo di campionamento sufficientemente piccolo ∆t. Ad ogni istante t i la variabilemeteorologica assuma il valore y i . Si faccia inoltre l’ipotesi che tra l’istante t i-1 e l’istante t
9 - TECNICHE PER L’OSSERVAZIONE DEL PBL.—————————————————————————⎯⎯——————————9.5.2.2 Trasduttore del secondo ordineLa dinamica di un trasduttore del secondo ordine è descritta dalla relazione differenziale seguente:2d x dxa2+ a1+ a0x = y( t)[9.13]2dt dtin cui ω = a 0 a2è la frequenza propria del trasduttore. Anche in questo caso è istruttivoconsiderare il comportamento del sensore del secondo ordine ad un segnale a gradino unitario e ad unsegnale armonico monocromatico.Nel caso di un segnale di ingresso a gradino del tipo (9.8), se si definisce il parametro h, dettorapporto di smorzamento o damping ratio, come:2a1h = [9.14]4aa02la risposta del trasduttore sarà data dalle relazione seguente:xy ⎪⎧⎪⎫0 −αt⎡ α ⎤( t) = 1−e cos( ω t) + sin ( ω t) ⎬ ⎪⎭a0⎨⎪⎩⎢⎣1ω11⎥⎦per h
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RINGRAZIAMENTICome in quasi tutte l
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INDICE⎯⎯⎯⎯⎯⎯⎯⎯⎯
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1. INTRODUZIONE AL PLANETARY BOUNDA
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2. MODELLO MATEMATICO DEL PBL.—
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3. ANALISI ENERGETICA DEL PLANETARY
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4. TEORIA DELLA SIMILARITÀ——
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5.ANALISI SPETTRALE DELLA TURBOLENZ
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6. LA STRUTTURA DEL PBL IN CONDIZIO
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7. IL PBL IN SITUAZIONI SUPERFICIAL
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8. MODELLI NUMERICI DEL PBL——
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9 - TECNICHE PER L’OSSERVAZIONE D
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10.STIMA DEI PARAMETRI DELLA TURBOL
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!10.STIMA DEI PARAMETRI DELLA TURBO
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Bibliografia⎯⎯⎯⎯⎯⎯⎯
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Roberto Sozzi (ARPA Lazio) Teodoro Georgiadis (CNR-IBIMET ...

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