Gen1000 Chamber Sound Reduction
Notice bibliographique
Résumé
Conviron’s GEN1000 chamber is one of their best-selling plant growth chambers, used by growers, researchers, and students all over the world. These growth chambers are currently producing 60 dBA (A-weighted decibel) of noise, which can be irritating for users that have these chambers in their labs or classrooms. The goal of the student team is to decrease these sound levels to 50 dBA. The chamber must be modified in a way that does not hinder the growth of the plants inside, while maintaining the manufacturing cost of the chamber. Additionally, the team must stay within the project budget of $5000 CAD NRE (Non-Recurring Engineering) cost. The primary element of sound production was identified as the condenser fans in the machine compartment of the chamber. The team researched existing methods of sound dampening and presented these to Conviron. Further research was requested on three of these ideas and was later narrowed down to two due to the feasibility of the solutions in terms of manufacturability and function. The two methods of sound reduction chosen included insulating all surfaces in the machine compartment with sound insulation foam and acoustic louvers to replace the ventilation holes in the back panel of the compartment. A preliminary sound test was conducted which resulted in a baseline average of 62 dBA. A preliminary machine compartment temperature test was also conducted which resulted in a maximum baseline temperature of 35.7⁰C. The machine compartment was then insulated with acoustic insulation foam on all the metal surfaces. Three prototype back panels were made to replace the original panel. The first panel (“Handmade”) was made in the University of Manitoba shop using box brakes and hand tools. The second panel (“Manufactured”) was made with Malach, a metal and machining company. The final panel (“3D Printer”) was made using a PLA (Polylactic acid) filament and a 3D printer, to mimic the shape of an industry standard acoustic louver. These panels were then installed and tested along with the insulation for sound and temperature for 1.5 hours. The Handmade, Manufactured, and 3D Printed panels emitted an average of 60.7, 60.5, and 59.7 dBA, respectively. The recommendation chosen by the team was to insulate the machine compartment and to redesign the back panel using the Manufactured panel design. This recommendation was chosen for its effectiveness in dampening sound and high frequencies, the manufacturability, and its relatively affordable price. The final recommendation came out to $291.74 for two rolls of acoustic insulation foam ($114.37) and for the manufactured panel ($63).
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,002 |
| Méta-épidémiologie (sens strict) | 0,002 | 0,001 |
| Méta-épidémiologie (sens large) | 0,001 | 0,001 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,001 | 0,001 |
| Communication savante | 0,002 | 0,001 |
| Science ouverte | 0,003 | 0,002 |
| Intégrité de la recherche | 0,001 | 0,002 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,044 | 0,011 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».