مهندسی نساجی گیلان:. گیل تکس

سایت تخصصی نساجی و پوشاک

مهندسی نساجی گیلان:. گیل تکس

سایت تخصصی نساجی و پوشاک

ﻣﺤﺎﺳﺒﻪ ﻣﺪول ﺧﻤﺸﻲ ﭘﺎرﭼﻪ ﺑﻪ روش اﻟﻤﺎن ﻣﺤﺪود ﺑﺎاﺳﺘﻔﺎده ا

ﻣﺤﺎﺳﺒﻪ ﻣﺪول ﺧﻤﺸﻲ ﭘﺎرﭼﻪ ﺑﻪ روش اﻟﻤﺎن ﻣﺤﺪود ﺑﺎاﺳﺘﻔﺎده از ﻧﺮم اﻓﺰارAnsys
 ﻣﺮﺿﻴﻪ ﺟﻮادی ﻃﻮﻗﭽﻲ، ﻣﺤﻤﺪ ﻗﺎﻧﻊ

ﻣﻘﺪﻣﻪ
در ﺑﺮرﺳﻲ و ﻣﻄﺎﻟﻌﻪی وﻳﮋﮔﻲﻫﺎی ﭘﺎرﭼﻪ، رﻓﺘﺎر ﺧﻤﺸﻲ ﻣﺎﻧﻨﺪ زﻳﺮ دﺳﺖ، آوﻳﺰش و ﻣﻘﺎوﻣﺖ در ﺑﺮاﺑﺮ ﭼـﺮوک اﻫﻤﻴـﺖ ﺑﺴـﺰاﻳﻲ دارد. ﺳﺨﺘﻲ ﺧﻤﺸﻲ ﻛﻪ ﺑﻪ ﻋﻨﻮان ﭘﺎراﻣﺘﺮی ﺟﻬﺖ ﺑﻴﺎن ﺧﻮاص ﺧﻤﺸﻲ ﭘﺎرﭼﻪ ﺗﻌﺮﻳﻒ ﺷﺪه اﺳﺖ، ﻣﻘﺎوﻣـﺖ ﭘﺎرﭼـﻪ را در ﺑﺮاﺑـﺮ ﺧﻤﺶ ﻧﺸﺎن ﻣﻲ دﻫﺪ. در ﻣﻮارد ﻣﻬﻨﺪﺳﻲ رﻓﺘﺎر ﺧﻤﺸﻲ ﺑﻪ ﺻﻮرت ﺧﻄﻲ ﻓﺮض ﻣﻲ ﺷﻮد و ﺳﺨﺘﻲ ﺧﻤﺸﻲ ﺑﻪ ﻋﻨﻮان ﺛـﺎﺑﺘﻲ در ﺗﻨﺎﺳﺐ ﻣﻴﺎن ﻣﻤﺎن وارد ﺷﺪه و ﺷﻌﺎع اﻧﺤﻨﺎی اﻳﺠﺎد ﺷﺪه ﺗﻌﺮﻳﻒ ﻣﻲﺷﻮد. ﻋﻠﻲرﻏﻢ ﺗﻌﺮﻳﻒ ﻓﻮق ﻣﻌﻤﻮﻻً ﺧﻤﺶ ﭘﺎرﭼـﻪ ﻫـﺎ ﻏﻴـﺮ ﺧﻄﻲ اﺳﺖ ﻛﻪ دﻟﻴﻞ اﻳﻦ اﻣﺮ ﺗﺸﻜﻴﻞ ﺷﺪن ﭘﺎرﭼﻪ از اﺟﺰای ﻟﻴﻔﻲ اﺳﺖ [ . 1و2و4 ]اوﻟﻴﻦ ﻛﺎر ﺗﺠﺮﺑﻲ روی اﻧﺪازهﮔﻴﺮی واﻗﻌﻲ ﺧﻮاص ﻣﻜﺎﻧﻴﻜﻲ ﭘﺎرﭼﻪ در ﺳﺎل 1930 ﺗﻮﺳﻂ ﭘﻴﺮس اﻧﺠﺎم ﺷﺪه اﺳـﺖ . روش اراﺋـﻪ ﺷﺪه ﺗﻮﺳﻂ ﭘﻴﺮس روﺷﻲ اﺳﺘﺎﻧﺪارد ﺑﻮده و ﺑﺮای ﺑﺮرﺳﻲ رﻓﺘﺎر ﺧﻤﺸﻲ اﻛﺜﺮ ﭘﺎرﭼﻪ ﻫﺎ ﻣﻨﺎﺳﺐ ﻣﻲﺑﺎﺷـﺪ . در اﻳـﻦ روش ﻣﻄـﺎﺑﻖ ﺷﻜﻞ 1 ﻳﻚ ﻧﻤﻮﻧﻪ ﭘﺎرﭼﻪ ﺑﺎ اﺑﻌﺎد 1×6 in روی ﻳﻚ ﺳﻜﻮ و زﻳﺮ ﺧﻂﻛﺶ ﻗﺮار ﻣﻲﮔﻴﺮد و ﺑﺎ ﻫﻞ دادن ﺧﻂﻛﺶ ﺑﻪ ﺟﻠـﻮ، ﭘﺎرﭼـﻪ ﺣﺮﻛﺖ ﻛﺮده ﺗﺎ ﺑﻪ زاوﻳﻪی ﻣﻌﻴﻨﻲ ﻧﺴﺒﺖ ﺑﻪ اﻓﻖ ﺑﺮﺳﺪ. در اﻳﻦ ﻣﻮﻗﻌﻴﺖ، ﻃﻮل ﻧﻤﻮﻧﻪ از روی ﺧـﻂ ﻛـﺶ ﺧﻮاﻧـﺪه ﺷـﺪه و ﻃـﻮل ﺧﻤﺶ ﻳﻌﻨﻲ ﻃﻮﻟﻲ از ﭘﺎرﭼﻪ ﻛﻪ ﺗﺤﺖ وزن ﺧﻮدش ﺑﺎ زاوﻳﻪای ﻣﻌﻴﻦ ﻧﺴﺒﺖ ﺑﻪ اﻓﻖ ﺧﻢ ﻣﻲﺷﻮد، ﺑﺎ ﻓﺮﻣﻮلﻫـﺎی زﻳـﺮ ﻣﺤﺎﺳـﺒﻪ ﻣﻲﺷﻮد

ادامه مطلب ...
مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 06:25 ق.ظ
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Prediction of the Frictional Properties of Woven Fabric by Artif

Prediction of the Frictional Properties of Woven Fabric by Artificial Neural Network
Hamid Zadeh Ghasemi, Rostam Namiranian, Amir Haeri
Abstract
It has been found that friction of fabric is dependant on fabric structure. In this investigation, Artificial Neural Networks have been used to model the relation between fabric structure and frictional properties of fabrics. In order to do that, one set of data was extracted from the literature available. This dataset was divided into two groups: Train data and Test data. Test data were not used for training of the networks whereas train data were employed. Fabric structures, Weft density, Finish and unfinished fabric, Weft yarn count and type of weft yarn were inputs and the outputs were static and dynamic friction forces in both warp-over-warp and weft-over-weft directions. Parameters of artificial neural networks were selected to provide the best results for the system. The results show that the use of artificial neural networks in order to predict the static and dynamic friction force has been successful.
Keywords: fabric structure, ANN, static friction force, dynamic friction force

ادامه مطلب ...
مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 06:22 ق.ظ
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اﺛﺮ ﺿﺨﺎﻣﺖ ﻧﺎﻧﻮ ذرات ﺑﺮ ﺧﺎﺻﻴﺖ ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ ﻣﻨﺴﻮج


اﺛﺮ ﺿﺨﺎﻣﺖ ﻧﺎﻧﻮ ذرات ﺑﺮ ﺧﺎﺻﻴﺖ ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ ﻣﻨﺴﻮﺟﺎت
 ﻣﻬﺪی ﺣﺴﻦ زاده، ﻋﻠﻲ ﺷﻤﺲ ﻧﺎﺗﺮی


ﭼﻜﻴﺪه
1 زﺑﺮی ﺳﻄﻮح ﻣﻮﺟﺐ ﺗﻘﻮﻳﺖ ﺧﺎﺻﻴﺖ آﺑﮕﺮﻳﺰی ﻣﻲ ﮔﺮدد. ﺳﻄﻮح اﺑﺮآﺑﮕﺮﻳﺰ ﺗﺎﺛﻴﺮ ﺑﻪ ﺳﺰاﻳﻲ در ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ  ﺳﻄﺢ دارد. ﺑﻬﺘﺮﻳﻦ ﻣﺜﺎل از ﻳﻚ ﺳﻄﺢ اﺑﺮ آﺑﮕﺮﻳﺰ ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪه ، ﺑﺮگ ﮔﻴﺎه ﻧﻴﻠﻮﻓﺮ آﺑﻲﻣﻲ ﺑﺎﺷﺪ. در اﻳﻦ ﻛﺎر ﺗﺤﻘﻴﻘﺎﺗﻲ ﺧﺎﺻﻴﺖ ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ ﻣﻨﺴﻮﺟﺎت ﺗﻜﻤﻴﻞ ﺷﺪه ﺑﺎ ﻧﺎﻧﻮ ذرات ﺑﻪ ﻛﻤﻚ ﻳﻚ ﻣﺪل ﺗﺌﻮری ﺑﺮرﺳﻲ ﺷﺪ. ﻧﺘﺎﻳﺞ ﺣﺎﺻﻠﻪ ﻧﺸﺎن ﻣﻲ دﻫﺪ ﻛﻪ ﺧﺎﺻﻴﺖ ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ ﻣﻨﺴﻮﺟﺎت ﺗﺎﺑﻊ ﺑﺮﺧﻲ از ﭘﺎراﻣﺘﺮﻫﺎی ﺳﻄﺢ از ﺟﻤﻠﻪ ارﺗﻔﺎع ﻧﺎﻧﻮ ذرات در ﺳﻄﺢ ﻣﻨﺴﻮج ﻣﻲ ﺑﺎﺷﺪ .
واژهﻫﺎی ﻛﻠﻴﺪی: ﺗﻜﻤﻴﻞ ﻧﺎﻧﻮ، ﺧﻮد ﺗﻤﻴﺰ ﺷﻮﻧﺪﮔﻲ، اﺑﺮآﺑﮕﺮﻳﺰی، زاوﻳﻪ ﺗﻤﺎس، زﺑﺮی ﺳﻄﺢ

ادامه مطلب ...
مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 12:53 ق.ظ
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ارزﻳﺎﺑﻲ ﭼﺮوک ﺑﺎ اﺳﺘﻔﺎده از روش رﺗﺒﻪﺑﻨﺪی ﻣﻨﻈﻢ

ارزﻳﺎﺑﻲ ﭼﺮوک ﺑﺎ اﺳﺘﻔﺎده از روش رﺗﺒﻪﺑﻨﺪی ﻣﻨﻈﻢ
ﻓﺮﻧﺎز ﻣﻌﻤﺎرﻳﺎن، ﻣﺤﻤﺪ اﻣﺎﻧﻲﺗﻬﺮان و ﻣﺴﻌﻮد ﻟﻄﻴﻔﻲ

ﭼﻜﻴﺪه
در اﻳﻦ ﺗﺤﻘﻴﻖ ﺑﺮای درﺟﻪ ﺑﻨﺪی ﭼﺮوک ﭘﺎرﭼﻪ از روش رﺗﺒﻪﺑﻨﺪی ﻣﻨﻈﻢ ﺑﻪ ﺟﺎی اﺳﺘﻔﺎده از ﻧﻤﻮﻧﻪﻫﺎی ﺷﺎﻫﺪ اﺳﺘﺎﻧﺪارد ﺑﻬﺮه ﮔﺮﻓﺘﻪ ﺷﺪه اﺳﺖ. ﭘﺲ از آﻧﻜﻪ درﺟﻪ ﺑﻨﺪی ﻧﻤﻮﻧﻪﻫﺎ ﺑﺎ اﺳﺘﻔﺎده از اﻳﻦ روش اﻧﺠﺎم ﺷﺪ، ﺑﺎ اﺳﺘﻔﺎده از ﻧﻮر ﭘﺮدازی ﻣﻨﺎﺳﺐ از ﻫﺮ ﻳﻚ از ﻧﻤﻮﻧﻪﻫﺎ ﻋﻜﺲ ﮔﺮﻓﺘﻪ ﺷﺪ. ﺗﺼﺎوﻳﺮ ﭘﺮدازش ﮔﺮدﻳﺪ و ﻃﻮل ﺧﻄﻮط ﭼﺮوک اﻧﺪازهﮔﻴﺮی ﺷﺪ ﺗﺎ ﺷﺎﺧﺺﻫﺎی ﭼﺮوک ﮔﺰارش ﮔﺮدد. ﻧﺘﺎﻳﺞ ﻧﺸﺎن ﻣﻲدﻫﺪ ﻛﻪ ﻫﻤﺒﺴﺘﮕﻲ ﺧﻮﺑﻲ ﺑﻴﻦ درﺟﻪﺑﻨﺪیﻫﺎی ﺣﺎﺻﻞ از روش رﺗﺒﻪﺑﻨﺪی ﻣﻨﻈﻢ و ﺷﺎﺧﺺﻫﺎی ﭼﺮوک وﺟﻮد دارد. ﺑﻨﺎﺑﺮاﻳﻦ ﻣﻲﺗﻮان از روش اراﺋﻪ ﺷﺪه ﺑﺮای درﺟﻪ ﺑﻨﺪی ﭼﺮوک ﭘﺎرﭼﻪﻫﺎ ﺑﻬﺮه ﮔﺮﻓﺖ ﺗﺎ از ﻣﺸﻜﻼت روش اﺳﺘﺎﻧﺪارد ﻣﺎﻧﻨﺪ ﺣﻀﻮر ﻧﻤﻮﻧﻪﻫﺎی ﺷﺎﻫﺪ، داﻣﻨﻪ ﻣﺤﺪود درﺟﻪﻫﺎ و ﻓﺎﺻﻠﻪﻫﺎی زﻳﺎد ﺑﻴﻦ ﻫﺮ ﺟﻔﺖ ﻧﻤﻮﻧﻪ ﺷﺎﻫﺪ، ﺟﻠﻮﮔﻴﺮی ﻛﺮد.
واژه ﻫﺎی ﻛﻠﻴﺪی: ارزﻳﺎﺑﻲ ﭼﺮوک ، درﺟﻪﺑﻨﺪی، رﺗﺒﻪﺑﻨﺪی ﻣﻨﻈﻢ، ﭘﺮدازش ﺗﺼﻮﻳﺮ

ادامه مطلب ...
مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 12:48 ق.ظ
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ﺑﺮرﺳﻲ ﺗﺄﺛﻴﺮ ﻋﻴﻮب ﻣﺘﻨﺎوب ﻧﺦ ﭘﻮد ﺑﺮ ﻇﺎﻫﺮ ﭘﺎرﭼﻪ ﺷﺒﻴﻪ ....

ﺑﺮرﺳﻲ ﺗﺄﺛﻴﺮ ﻋﻴﻮب ﻣﺘﻨﺎوب ﻧﺦ ﭘﻮد ﺑﺮ ﻇﺎﻫﺮ ﭘﺎرﭼﻪ ﺷﺒﻴﻪ ﺳﺎزی ﺷﺪه ﺑﺎ اﺳﺘﻔﺎده از روش ﭘﺮدازش ﺗﺼﻮﻳﺮ

ﻣﻴﺜﻢ ﻣﻌﺰی، ﻣﺤﻤﺪ ﻗﺎﻧﻊ، ﺳﻴﺪ ﻋﺒﺪاﻟﻜﺮﻳﻢ ﺣﺴﻴﻨﻲ

ﭼﻜﻴﺪه
ﻧﺎﻳﻜﻨﻮاﺧﺘﻲ ﻧﺦ و ﻋﻴﻮب ﻣﻮﺟﻮد در ﻧﺦ ﻏﺎﻟﺒﺎً ﺑﺼﻮرت ﺗﻜﺮار ﺷﻮﻧﺪه و ﻣﺘﻨﺎوب ﺑﻮده و ﻣﻲ ﺗﻮان ﺑﻪ ﻛﻤﻚ روش ﭘﺮدازش ﺗﺼﻮﻳﺮ ﻣﺸﺨﺺ ﺳﺎﺧﺖ. ﻫﺪف اﺻﻠﻲ اﻳﻦ ﺗﺤﻘﻴﻖ ﺗﻌﻴﻴﻦ و ﺗﺸﺨﻴﺺ ﻣﺴﺘﻘﻴﻢ اﺛﺮ ﻋﻴﻮب ﻧﺦ ﭘﻮد، در ﻳﻚ ﭘﺎرﭼﻪ ﺗﺎری ﭘﻮدی ﺷﺒﻴﻪ ﺳﺎزی ﺷﺪه ﻣﻲ ﺑﺎﺷﺪ . اﺑﺘﺪا ﺑﺎ اﺳﺘﻔﺎده از راﻳﺎﻧﻪ دو ﻧﻮع ﭘﺎرﭼﻪ ﺑﺎ ﻃﻮل ﻣﻮج ﻣﺸﺨﺺ ﻋﻴﺐ ﺑﺮای ﻧﺦ ﭘﻮد وﻣﺸﺨﺼﺎت دﻟﺨﻮاه ﻣﺎﺷﻴﻦ و ﻣﻮاد اوﻟﻴﻪ ﺷﺒﻴﻪ ﺳﺎزی ﮔﺮدﻳﺪ در اداﻣﻪ ﺑﺮروی اﻳﻦ ﺗﺼﺎوﻳﺮ ﻋﻤﻠﻴﺎت ﭘﺮدازش ﺗﺼﻮﻳﺮ اﻧﺠﺎم  و ﺷﺪ ﻃﻮل ﻣﻮج ﻫﺎی ﻋﻴﺐ ﻧﺦ ﭘﻮد ﻣﺤﺎﺳﺒﻪ ﮔﺮدﻳﺪ . ﻣﻘﺎﻳﺴﻪ ﺑﻴﻦ ﻧﺘﺎﻳﺞ ﺣﺎﺻﻠﻪ از اﻧﺪازه ﮔﻴﺮی ﺑﻪ روش آﻧﺎﻟﻴﺰ ﺗﺼﻮﻳﺮ وﻃﻮل ﻣﻮﺟﻲ ﻛﻪ ﭘﺎرﭼﻪ ﺷﺒﻴﻪ ﺳﺎزی ﺷﺪه ﺑﻮد ﻧﺸﺎن داد ﻛﻪ روش ﺑﻜﺎر ﺑﺮده ﺷﺪه از دﻗﺖ ﻗﺎﺑﻞ ﻗﺒﻮﻟﻲ ﺑﺮﺧﻮردار اﺳﺖ .
واژهﻫﺎی ﻛﻠﻴﺪی: ﻋﻴﻮب ﻣﺘﻨﺎوب ﻧﺦ ، ﻃﻮل ﻣﻮج ، ﻋﺮض ﻣﻔﻴﺪ ﭘﺎرﭼﻪ ، ﻇﺎﻫﺮ ﭘﺎرﭼﻪ ، رﮔﻪ ﻟﻮزی ﺷﻜﻞ

ادامه مطلب ...
مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 12:46 ق.ظ
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ﻣﺪﻟﺴﺎزی ﺗﻘﻠﻴﻞ وزن ﭘﺎرﭼﻪ ﭘﻠﻲ اﺳﺘﺮ ﺑﻪ ﺻﻮرت ﺗﺎﺑﻌﻲ از...

ﻣﺪﻟﺴﺎزی ﺗﻘﻠﻴﻞ وزن ﭘﺎرﭼﻪ ﭘﻠﻲ اﺳﺘﺮ ﺑﻪ ﺻﻮرت ﺗﺎﺑﻌﻲ از ﭘﺎراﻣﺘﺮﻫﺎی ﻏﻠﻈﺖ ﺳﻮد ﺳﻮز ،آور زﻣﺎن ﻋﻤﻠﻴﺎت و دﻣﺎی ﺣﻤﺎم و ﻣﺤﺎﺳﺒﻪ ﻣﻴﻨﻴﻤﻢ ﻫﺰﻳﻨﻪ .
 ﺣﺴﻴﻦ ﺗﻮاﻧﺎﻳﻲ ، ﻣﻬﺪی ﺳﻴﻒاﻟﻪزاده، ﻋﻠﻲزﻳﻨﻞﻫﻤﺪاﻧﻲ
ﭼﻜﻴﺪه
ﺗﻘﻠﻴﻞ وزن، ﻳﻚ ﻓﺮآﻳﻨﺪ ﺗﻜﻤﻴﻠﻲ اﺳﺖ ﻛﻪ ﺑﺎ ﻫﺪف ﺑﻬﺒﻮد ﺑﻌﻀﻲ از ﺧﻮاص ﭘﺎرﭼﻪﻫﺎی ﭘﻠﻲاﺳﺘﺮ، از ﻃﺮﻳﻖ ﻫﻴﺪروﻟﻴﺰ، ﺑﻪ ﻛﻤﻚ ﻣﺤﻠﻮلﻫﺎی ﻗﻠﻴﺎﻳﻲﻧﻈﻴﺮ ﺳﺪﻳﻢﻫﻴﺪروﻛﺴﻴﺪ اﻧﺠﺎم ﻣﻲ .ﺷﻮد ﺷﺪت ﻫﻴﺪروﻟﻴﺰ ﺳﻄﺤﻲ اﻟﻴﺎف ﭘﻠﻲاﺳﺘﺮ ﺑﺎ ﺳﺪﻳﻢ ﻫﻴﺪروﻛﺴﻴﺪ ﻧ در و ﺘﻴﺠﻪ ﻣﻴﺰان درﺻﺪ ﺗﻘﻠﻴﻞ وزن ﺣﺎﺻﻞ از ،آن ﺑﻪ ﻴﻣﺘﻐ ﺮﻫﺎی ﻓﺮآﻳﻨﺪ ﻣﺜﻞ ﻏﻠﻈﺖ ﺳﺪﻳﻢﻫﻴﺪروﻛﺴﻴﺪ ( ﺳﻮد ﺳﻮزآور ،) زﻣﺎن ﻋﻤﻠﻴﺎت و دﻣﺎی ﺣﻤﺎم ﺑﺴﺘﮕﻲ دارد .ﻃﺮح اﻧﺠﺎم آزﻣﺎﻳﺶ ﺑﻪ روش ﻓﺎﻛﺘﻮرﻳﻞ ﻛﺎﻣﻞ و ﺑﺎ درﻧﻈﺮ ﮔﺮﻓﺘﻦ ﻫﺮﻳﻚ از ﻣﺘﻐﻴﺮﻫﺎی ﻓﺮآﻳﻨﺪ در ﺳﻪ ﺳﻄﺢ، ﺻﻮرت ﮔﺮﻓﺖ . ﺑﻌﺪ از اﻧﺠﺎم آزﻣﺎﻳﺶ-ﻫﺎ ﻣﻄﺎﺑﻖ ﺑﺎ ﺟﺪول ﻃﺮح اﻧﺠﺎم آزﻣﺎﻳﺶ و ﺟﻤﻊ آوری دادهﻫﺎی ﻣﺮﺑﻮط ﺑﻪ درﺻﺪ ﺗﻘﻠﻴﻞ وزن ﭘﺎرﭼﻪ ﭘﻠﻲاﺳﺘﺮ ، ﻴﻣﺘﻐ ﺮﻫﺎی ﻣﻌﻨﻲدار ﺑﺎ اﺳﺘﻔﺎده از
آﻧﺎﻟﻴﺰ وارﻳﺎﻧﺲ ﻣﺸﺨﺺ ﮔﺮدﻳﺪﻧﺪ. ﺳﭙﺲ ﻣﺪﻟﺴﺎزی ﺑﺮ اﺳﺎس ﻣﺘﻐﻴﺮﻫﺎی ﻣﻌﻨﻲدار و ﺑﺎ اﺳﺘﻔﺎده از روش آﻣﺎری رﮔﺮﺳﻴﻮن ﺳﻄﺢ ﭘﺎﺳﺦ اﻧﺠﺎم ﮔﺮﻓﺖ. ﺑﻌﺪ از ﺑﺮرﺳﻲ اﻋﺘﺒﺎر ﻣﺪل اوﻟﻴﻪ، ﺟﻬﺖ ﺗﻌﻴﻴﻦ ﻧﻮع اﺻﻼح ﻣﻮرد ﻧﻴﺎز، از روش Box-Cox اﺳﺘﻔﺎده و ﻣﺪل اﺻﻼح ﺷﺪه ﻧﻬﺎﻳﻲ ﻛﺴﺐ ﮔﺮدﻳﺪ . در ﻧﻬﺎﻳﺖ ﺑﺎ ﺗﻌﻴﻴﻦ ﺗﺎﺑﻊ ﻫﺰﻳﻨﻪ، ﻣﻘﺎدﻳﺮ ﻣﺘﻐﻴﺮﻫﺎی ﻓﺮآﻳﻨﺪ، ﺑﺮای درﺻﺪﻫﺎی ﻣﻌﻴﻦ ﺗﻘﻠﻴﻞ وزن ﻛﻪ ﺑﻪ ﻣﻴﻨﻴﻤﻢ ﻫﺰﻳﻨﻪ ﻣﻨﺠﺮ ﻣﻲﺷﻮﻧﺪ ﺗﻌﻴﻴﻦ ﻣﻲﮔﺮدﻧﺪ .
واژهﻫﺎی ﻛﻠﻴﺪی : ﻣﺪﻟﺴﺎزی، ﺗﻘﻠﻴﻞ وزن، ﭘﺎرﭼﻪ ﭘﻠﻲاﺳﺘﺮ، ﻋﻤﻠﻴﺎت ﻗﻠﻴﺎﻳﻲ ، ﻫﻴﺪروﻟﻴﺰ، ﻣﻴﻨﻴﻤﻢ ﻫﺰﻳﻨﻪ

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مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 12:44 ق.ظ
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Automatic Weave Repeat Identification using Image Analysis

Automatic Weave Repeat Identification using Image Analysis
Fatemeh Ajallouian, Hossein Tavanai, Maziar Palhang
Abstract
This paper describes the application of a new algorithm using image processing techniques for the development of a universal and almost automatic method, capable of identifying weave repeat. This method is based on scanning and obtaining a gray scale image of the original sample which is enhanced by morphological operations and then filtered by steerable vertical filters and next segmented into blocks showing either a warp or a weft point. The blocked image is divided into specific subimages, followed by operating sum over their columns and forming a matrix from them. A primary and secondary threshold is then defined giving rise to the formation of the weave pattern in the form of black and white squares. To identify the weave repeat, a matrix, replacing the black and white squares of the weave pattern by zero and one is produced. Then the first repeating row and column are found, showing the start of the next repeat vertically and horizontally, leading to the identification of weave repeat.
 Keywords: weave repeat, image analysis, morphological operations, steerable filters, nonlinear diffusion filtering, fuzzy c-means clustering

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مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 12:41 ق.ظ
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Measurement of the Silver Nano-particles Immobilized on the Cot

Measurement of the Silver Nano-particles Immobilized on the  Cotton Fabric by Exhaustion MethodMohammad Reza Nateghi, Mohammad Shateri Khalilabad, Mohammad Esmail Yazdanshenas
Abstract
In the present work, the capabilities of the anodic stripping voltammetry (ASV) and the UV-vis spectrophotometry for the determination of the silver nanoparticles immobilized on the cellulosic fibers were evaluated and compared to those of Ag+determination using inductively coupled plasma atomic emission spectrometry. The absorption spectra of dithizone (diphenylthiocarbazone) in carbon tetra chloride before and after addition of the Ag+ were recorded. Absorption at 612 nm reduces as the amount of the silver ion added to the dithizone solution increases. Calibration plot was established under the optimized conditions. A liner correlation was found between the concentration
of the Ag+ and the absorbance at 612 nm for the range of 1-19 mg L-1, with a regression equation of ∆A= 0.0591 C + .0701 and correlation coefficient of 0.9981.
Determination of the Ag+ was also carried out by ASV method on the glassy carbon working electrode. A preconcentration potential of -500 mV was applied during 60 followed by a rest period of 10 s. Stripping of the silver ion
by re-oxidation process can be observed at the potential range of -200 - 70 mV. A linear relation was found between the concentration of the Ag+ and the peak current in the range of 1-16 mg L-1. The regression equation Ip = 2.484C + 0.034 and correlation coefficient of 0.9989 were resulted. Also, the Ag content of the cotton samples was determined by ICPOES technique and compared with those of obtained by two above mentioned methods. This study indicated that there is a good agreement between the results obtained by these three methods.
Keywords: Dithizone, Voltammetry, Spectrophotometry, Silver, Cotton fabrics

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مدیر سایت چهارشنبه 4 اردیبهشت‌ماه سال 1392 ساعت 12:39 ق.ظ
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