نتایج جستجو برای: linear regression model.

تعداد نتایج: 2633472  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده منابع طبیعی و علوم دریایی 1393

روابط بین مراحل زندگی (لاروی، گذر و بلوغ) شانه دار mnemiopsis leidyi و شاخصه های فیزیکوشیمیایی و زیستی با استفاده از مدل های مختلف بر اساس تغییرات زمانی (ماه) و مکانی (ترانسکت، ایستگاه و لایه) در امتداد سواحل مازندران طی سال 1391 ارزیابی شد. به منظور بالا بردن عملکرد مدل ها، از گونه های غالب پلانکتونی در هر فصل (90% تراکم کل) برای مدل سازی استفاده گردید. برای درک بهتر از وضعیت اکولوژیکی شانه ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده علوم پایه 1389

abstract part one: the electrode oxidation potentials of a series of eighteen n-hydroxy compounds in aqueous solution were calculated based on a proper thermodynamic cycle. the dft method at the level of b3lyp-6-31g(d,p) was used to calculate the gas-phase free energy differences ,and the polarizable continuum model (pcm) was applied to describe the solvent and its interaction with n-hydroxy ...

Journal: :international journal of mathematical modelling and computations 0
s. hajiali tehran medical branch, islamic azad university, tehran iran, islamic republic of department of genetics m. s. doroudian central tehran branch, islamic azad university, tehran iran, islamic republic of young researchers club h. borna medical university branch, islamic azad university, tehran iran, islamic republic of young researchers club

new statistic based models provide a wide area of prediction equipments for different science areas. among these fields biology have just entered the contest of interdisciplinary sciences. drug discovery is a long and expensive process which could be decreased with theoretical approaches. in this study, 500 reported assayed anti cancer molecules were extracted from science direct articles, sket...

Journal: :مجله بهداشت محیط و توسعه پایدار 0
parvaneh talebihematabadi msc student, department of natural recourses engineering, branch of environmental pollution, school of agriculture and natural resources, islamic azad university of meybod, yazd, iran. hadi zarei mahmoud abadi assistant professor, department of environment, college of agriculture and natural resources, islamic azad university of meybod, yazd, iran. hadi eslami phd candidate,environmental science and technology research center, department of environmental health engineering, school of public health, shahidsadoughi university of medical sciences, yazd, iran.

introduction: the development of an appropriate model for the quality control of an industrial wastewater treatment system can save the time as well as the cost. this study was performed to determine an appropriate model in order to predict the cod and tkn parameters by bod5 and nh4+ in the meybod industrial estate waste water treatment plant (wwtp). methods: this descriptive – analytical study...

Journal: :energy equipment and systems 0
behzad elhami department of agricultural machinery engineering, faculty of agricultural engineering and technology, university of tehran, karaj, iran asadollah akram department of agricultural machinery engineering, faculty of agricultural engineering and technology, university of tehran, karaj, iran majid khanali department of agricultural machinery engineering, faculty of agricultural engineering and technology, university of tehran, karaj, iran seyed hashem mousavi-avval department of agricultural machinery engineering, faculty of agricultural engineering and technology, university of tehran, karaj, iran

in the present study, the energetic and economic modeling of lentil and chickpea production in esfahan province of iran was conducted using adaptive neuro-fuzzy inference system (anfis) and linear regression. data were taken by interviewing and visiting of 140 lentil farms and 110 chickpea farms during 2014-2015 production period. the results showed that the yield and total energy consumption w...

Journal: :Scandinavian Journal of Statistics 2013

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهرکرد - دانشکده کشاورزی 1393

نتایج مطالعات مختلف در طول سال های گذشته به خوبی نشان می دهند که با افزایش تولید شیر، عملکرد تولیدمثلی در گاو شیری دچار افت شده است، که این مسأله می تواند سوددهی واحدهای تولیدی گاوشیر را تحت تأثیر قرار دهد به همین دلیل هدف از انجام این مطالعه بررسی صفات تولیدمثلی در شهرکرد بود. در این پژوهش از 700 رکورد مربوط به 501 تلیسه هلشتاین و 1773 رکورد مربوط به788 رکورد رأس گاو (موجود در 8 و 9 واحد پرورش...

Journal: :Kirkuk University Journal-Scientific Studies 2007

Journal: :Advances in economics, business and management research 2022

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