نتایج جستجو برای: quadratic and cubic root mean square of error

تعداد نتایج: 24095786  

Journal: :پژوهش های خاک 0
فاطمه کاراندیش استادیار گروه مهندسی آب دانشگاه زابل علی شاهنظری دانشیار گروه مهندسی آب دانشگاه علوم کشاورزی و منابع طبیعی ساری

soil temperature is one of the most effective parameters for plant growth. although the spatiotemporal monitoring of soil temperature is important for providing an optimum condition to maximize the yield efficiency, indirect measurements for zoning  of soil temperature are essential due to difficulties in direct methods of measuring it and also the limited measurement points. thus, the efficien...

Journal: :مهندسی بیوسیستم ایران 0
امید تاج بخش کارشناس ارشد مکانیک ماشین های کشاورزی، بخش مکانیک ماشین های کشاورزی، دانشکدۀ کشاورزی، دانشگاه شیراز. سیدحسین کارپرورفرد دانشیار بخش مکانیک ماشین های کشاورزی، دانشکدۀ کشاورزی، دانشگاه شیراز

the purpose of this research was to study and predict fuel consumption rate of tractor due to different aspect ratios of chisel plow blade and to determine a general relationship equation between aspect ratio ( ) and fuel consumption rate.  an itm-399 (81 kw) tractor and a mounted-type chisel plow with 9 shanks were used. the 5 and 10 cm width chisel blades were used. the experiments were condu...

Journal: :تولیدات دامی 0
حمید امانلو استاد، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه زنجان، ایران هادی شفیعی دانشجوی کارشناسی ارشد، گروه علوم دامی، دانشکدۀ کشاورزی، واحد شهرکرد، دانشگاه آزاد اسلامی، شهرکرد، ایران طاهره امیرآبادی فراهانی دانشجوی دکتری، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه زنجان، ایران فرشید خیری استادیار، گروه علوم دامی، دانشکدۀ کشاورزی، واحد شهرکرد، دانشگاه آزاد اسلامی، شهرکرد، ایران نجمه اسلامیان فارسونی دانشجوی دکتری، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه زنجان، ایران

in order to compare the precision of predictions of nrc (2001) and cncps models, 17 holstein fresh cows were assigned in a randomized complete block design to a balanced diet with nrc (2001) and cncps software. the predicted dmi, energy allowable milk and protein allowable milk by both models were compared with observed values. the precision of the predictions of models was evaluated by calcula...

2010
Tatiana de Oliveira Sato Gert-Åke Hansson Helenice Jane Cote Gil Coury

Electrogoniometers are prone to crosstalk errors related to endblocks rotation (general crosstalk) and to the characteristics of each sensor (individual crosstalk). The aim of this study was to assess the crosstalk errors due to endblock misalignments and to propose a procedure to compensate for these errors in knee applications. A precision jig was used to simulate pure ± 100° flexion/extensio...

2010
Alexander Dekhtyar

• Predictive Accuracy Measures. These measures evaluate how close the recommender system came to predicting actual rating/utility values. • Classification Accuracy Measures. These measures evaluate the frequency with which a recommender system makes correct/incorrect decisions regarding items. • Rank Accuracy Measures. These measures evaluate the correctness of the ordering of items performed b...

Ali shahbazi Kheyrolah khademi reza koochaki,

Deficiency and inappropriate distribution of reengage station is one of challenges faced by researchers in hydrology and climate science. In this research, evaluate the applicability of four gridded precipitation data products ERA-Interim, PERSIANN-CDR, PERSIANN-CCS and CRU as a supplement or substitute for ground data in a monthly time scales. This assessment was done by comparison with observ...

2005
B. Dag I. Keskin F. Mikailsoy

The objective of this study was to investigate the use of four different mathematical functions (Wood, Inverse Polynomial, Quadratic and Cubic models) for describing the lactation curve of unimproved Awassi ewes. Data were collected from 136 ewes from the same flock raised on the State Farm of Gözlü in the Konya Province of Turkey. The differences in estimated total milk yields between the mode...

Horizontal directional drilling (HDD) is widely used in soil and rock engineering. In a variety of conditions, it is necessary to estimate the torque required for performing the reaming operation. Nevertheless, there is not presently a convenient method to accomplish this task. In this paper, to overcome this difficulty based on the basic concepts of rock engineering systems (RES), a model for ...

2013
Maitreyee Dutta

Accurately estimating software effort is probably the biggest challenge facing software developers. Estimates done at the proposal stage has high degree of inaccuracy, where requirements for the scope are not defined to the lowest details, but as the project progresses and requirements are elaborated, accuracy and confidence on estimate increases. It is important to choose the right software ef...

Journal: :Gait & posture 2007
Jefferson W Streepey Robert V Kenyon Emily A Keshner

We explored the destabilizing effect of visual field motion as the base of support (BOS) and the field of view (FOV) were narrowed. Visual field motion was achieved using an immersive virtual environment (scene) that moved realistically with head motion (natural motion) and translated sinusoidally at 0.1Hz in the fore-aft direction (augmented motion). Natural motion was presented in stereo whil...

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