با همکاری انجمن مهندسان مکانیک ایران

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه فنی کشاورزی، پردیس ابوریحان، دانشگاه تهران، ایران

2 گروه مهندسی مکانیک بیوسیستم، دانشگاه شهرکرد، شهرکرد، ایران

3 گروه فناوری صنایع غذایی، پردیس ابوریحان، دانشگاه تهران، ایران

چکیده

روغن زیتون فرابکر همیشه مورد توجه و خواست استفاده‌کنندگان می‌باشد؛ از این‌رو در روغن‌های زیتونِ بکر و فرابکر، تقلب، با افزودن روغن‌های با ارزش غذایی و قیمت کمتر مثل کانولا، آفتابگردان، تفاله زیتون و غیره مشاهده می‌گردد. در این پژوهش با استفاده از فناوری ماشین بویایی روغن زیتون فرابکر، از نمونه‌های تقلبی تهیه شده با روغن‌های متداول در بازار و با هفت مدل طبقه‌بندی مختلف تشخیص داده شد. نمونه‌ها در شش دسته‌ی "خالص و 5، 10، 20، 35 و 50 درصد تقلب" و هر تیمار در هفت نمونه تهیه و آزمایش‌ها در هفت تکرار انجام گرفت. سامانه بویایی از هشت حسگر متفاوت تشکیل شده که برای هر کدام نمودار تغییر ولتاژ بر حسب زمان تهیه و از آن نمودار چهار ویژگی "کمینه، بیشینه، میانگین و اختلاف بیشینه و کمینه" در مدل‌های طبقه‌بندی استفاده گردید. به این ترتیب تعداد 32 ویژگی برای هشت حسگر استخراج و مورد تجزیه و تحلیل قرار گرفت. به جهت تاثیر دمای نمونه‌ها در خروجی سامانه، تمام آزمایش‌ها در دمای ثابت انجام گرفتند. طبقه‌بندی نتایج با چهار الگوریتم طبقه‌بندی "K-همسایگی نزدیک، ماشین بردار پشتیبان، شبکه عصبی مصنوعی و آدابوست" صورت پذیرفت. 70% داده‌ها برای آموزش و 30% برای آزمون استفاده گردید. از بین 32 ویژگی، ویژگی "کمینه مقدار خروجی سنسور TGS-822" بیشترین تاثیر را در دقت طبقه‌بندی داشتند. نتایج نشان داد روش طبقه‌بندی همسایگی نزدیک با بهترین دقت (89/89%) و پس از آن روش ماشین بردار پشتیبان (52/86%)  بیشترین دقت طبقه‌بندی را دارا بودند.

کلیدواژه‌ها

Open Access

©2021 The author(s). This article is licensed under Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source.

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