نتایج جستجو برای: gray forecasting

تعداد نتایج: 82557  

Hossein Akbari-Lalimi, Mehdi Momennezhad, Shahrokh Nasseri,

Introduction: Voxel based morphometry is a type of statistical parametric mapping that can be used to investigate the effect of diseases such as epilepsy, Alzheimer's disease and Parkinson's disease or other agent such as skills on brain structure (white matter, gray matter and cerebrospinal fluid). The aim of this study is evaluate the effectiveness of this method in detection of differen...

خلاصه: سابقه و هدف: توانایی تخمین ثبات اولیه ایمپلنت و کیفیت استخوان قبل از جراحی در ناحیه قراردادن ایمپلنت، امکان انتخاب پروتکل درمانی مناسب را فراهم می کند. هدف از این مطالعه تعیین کیفیت  استخوانی در ناحیه جایگذاری ایمپلنت با استفاده از CBCT gray values(bone density values) و بررسی ارتباط ان باثبات اندازه گیری شده بلافاصله بعد از جایگذاری ایمپلنت می باشد. مواد و روش‌ها: در این مطالعه تجربی ت...

The aim of the short term load forecasting is to forecast the electric power load for unit commitment, evaluating the reliability of the system, economic dispatch, and so on. Short term load forecasting obviously plays an important role in traditional non-cooperative power systems. Moreover, in a restructured power system a generator company (GENCO) should predict the system demand and its corr...

2015
Kun Yang Shuang Liu

In this paper, we presented the performance of forecasting model and error correction will affect the accuracy of short-term load forecasting. Least squares support vector machines (LS-SVM) based on improved particle swarm optimization is selected as load forecasting model. Forecasting accuracy and generalization performance of LS-SVM depend on selection of its parameters greatly. Adaptive part...

2014
Ye Ren P. N. Suganthan

Hybrid model is a popular forecasting model in renewable energy related forecasting applications. Wind speed forecasting, as a common application, requires fast and accurate forecasting models. This paper introduces an Empirical Mode Decomposition (EMD) followed by a k Nearest Neighbor (kNN) hybrid model for wind speed forecasting. Two configurations of EMD-kNN are discussed in details: an EMD-...

2016
Yuyang Gao Chao Qu Kequan Zhang Francisco Martínez Álvarez

With increasing importance being attached to big data mining, analysis, and forecasting in the field of wind energy, how to select an optimization model to improve the forecasting accuracy of the wind speed time series is not only an extremely challenging problem, but also a problem of concern for economic forecasting. The artificial intelligence model is widely used in forecasting and data pro...

2003
G. Peter Zhang

Artificial neural networks have emerged as an important quantitative modeling tool for business forecasting. This chapter provides an overview of forecasting with neural networks. We provide a brief description of neural networks, their advantages over traditional forecasting models, and their applications for business forecasting. In addition, we address several important modeling issues for f...

Journal: :IEEE Journal of Oceanic Engineering 2021

Optimal wave energy control is noncausal as the command optimized based on incoming force. Therefore, implementation of requires forecasting future A real-time latching algorithm short-term force prediction developed in this study to tackle such noncausality. The forces are forecasted using a gray model. receding horizon strategy used optimize online, over interval. Based predicted forces, powe...

Journal: :مجله دانشگاه علوم پزشکی کرمانشاه 0
soheila samadzadeh assistant professor of kermanshah medical university mandana motameni mansour rezaei cyrus rezaei javad faroukhi

background: carpal tunnel syndrome (ctu) is the most common neuropathy in the body and one of the most important causes of occupational disability. the aim of the present study was to compare the diagnostic power of doppler sonography and gray scale in diagnosing cts and their comparison with nerve conduction studies (ncv). methods: in this analytical study, diagnostic value of doppler and gray...

In this study, the effect of different doses of gamma radiation was investigated on seed germination factors of Caper species. Gamma irradiation was performed using a cobalt-60 radiation with the radiation speed of 0.018 Gray/second and five doses of gamma radiation (0, 20, 40, 60 and 100 Gray) in a completely randomized design with 4 replication. The results showed that gamma radiation signifi...

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