{"id":38880,"date":"2019-10-31T22:26:31","date_gmt":"2019-10-31T19:26:31","guid":{"rendered":"https:\/\/prohoster.info\/blog\/nedorabotka-v-python-skripte-mogla-privesti-k-nevernym-rezultatam-v-bolee-100-publikatsiyah-po-himii\/"},"modified":"2019-10-31T22:26:31","modified_gmt":"2019-10-31T19:26:31","slug":"nedorabotka-v-python-skripte-mogla-privesti-k-nevernym-rezultatam-v-bolee-100-publikatsiyah-po-himii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/nedorabotka-v-python-skripte-mogla-privesti-k-nevernym-rezultatam-v-bolee-100-publikatsiyah-po-himii","title":{"rendered":"O deficien\u021b\u0103 \u00een scriptul Python ar fi putut duce la rezultate incorecte \u00een peste 100 de publica\u021bii despre chimie","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Cercet\u0103tor la Universitatea din Hawaii a descoperit<\/a><\/noindex> o problem\u0103 \u00een scriptul Python folosit pentru calcule deci\u0219<\/a><\/noindex>, care determin\u0103 structura chimic\u0103 a substan\u021bei studiate prin analiza spectral\u0103 a semnalelor prin metoda rezonan\u021bei magnetice nucleare<\/a><\/noindex>. \u00cen timpul verific\u0103rii rezultatelor cercet\u0103rilor unuia dintre profesori, cercet\u0103torul a observat c\u0103, la rularea scriptului pe diferite sisteme de operare cu acela\u0219i set de date, se ob\u021bineau rezultate diferite.<\/p>\n

De exemplu, la rularea pe macOS 10.14 \u0219i Ubuntu 16.04, pentru setul de date testat, scriptul a generat<\/a><\/noindex> o valoare incorect\u0103 de 172.4 \u00een loc de 173.2. Scriptul con\u021bine aproximativ 1000 de linii de cod \u0219i este utilizat de chimi\u0219ti din 2014. Studiul codului a ar\u0103tat c\u0103 generarea unei valori gre\u0219ite este cauzat\u0103<\/a><\/noindex> diferen\u021belor la sortarea fi\u0219ierelor \u00een diferite sisteme de operare. Autorii scriptului considerau c\u0103 func\u021bia \"glob()<\/a><\/noindex>\" \u00eentotdeauna returneaz\u0103 fi\u0219ierele sortate dup\u0103 nume, \u00een timp ce \u00een documenta\u021bia pentru glob se men\u021bioneaz\u0103 c\u0103 ordinea de ie\u0219ire nu este garantat\u0103. Corectarea a constat \u00een ad\u0103ugarea list_of_files.sort() dup\u0103 apelul glob().<\/p>\n

\"O<\/a><\/noindex><\/center><\/p>\n

Problema identificat\u0103 a pus sub semnul \u00eentreb\u0103rii corectitudinea a mai mult de 100 de publica\u021bii \u00een chimie, ale c\u0103ror concluzii au fost f\u0103cute pe baza deci\u0219ului chimic calculat prin script. Num\u0103rul exact de studii \u00een care a fost folosit scriptul este necunoscut, dar publica\u021bia cu codul s\u0103u a fost citat\u0103 \u00een 158 de lucr\u0103ri. Autorilor acestor lucr\u0103ri li s-a recomandat s\u0103 evalueze corectitudinea func\u021bion\u0103rii scriptului pe sistemele de operare utilizate pentru calcule \u0219i s\u0103 efectueze recalcul\u0103ri pentru a se asigura de exactitatea valorilor calculate. Incidentul este un exemplu excelent al faptului c\u0103 nu doar calitatea desf\u0103\u0219ur\u0103rii experimentului, ci \u0219i corectitudinea proces\u0103rii datelor ob\u021binute \u00een programele care au fost folosite anterior poate influen\u021ba rezultatul final.
\nCercet\u0103torul de la Universitatea din Hawaii a descoperit o problem\u0103 \u00een.<\/p>\n

<\/a><\/noindex><\/p>\n

Sursa: opennet.ro<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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