نتایج جستجو برای: and mean percent error

تعداد نتایج: 16868258  

2017
George E Saulnier Janna C Castro Curtiss B Cook Bithika M Thompson

Aim Apply methods of damped trend analysis to forecast inpatient glycemic control. Method Observed and calculated point-of-care blood glucose data trends were determined over 62 weeks. Mean absolute percent error was used to calculate differences between observed and forecasted values. Comparisons were drawn between model results and linear regression forecasting. Results The forecasted mea...

Journal: :Expert Syst. Appl. 2009
Adil Baykasoglu Mustafa Göçken

In this paper, a new approach for due date assignment in a multi-stage job shop is proposed and evaluated. The proposed approach is based on a genetic programming technique which is known as gene expression programming (GEP). GEP is a relatively new member of the genetic programming family. The primary objective of this research is to compare the performance of the proposed due date assignment ...

2005
Mahesh Kumar

Given sales forecasts for a set of items along with the standard deviation associated with each forecast, we propose a new method of combining forecasts using the concepts of clustering. Clusters of items are identified based on similarity in their sales forecasts and then a common forecast (or combined forecast) is computed for each cluster of items. The objective of clustering is to minimize ...

Journal: :Numerische Mathematik 2016
Art B. Owen

When the worst case integration error in a family of functions decays as n−α for some α > 1 and simple averages along an extensible sequence match that rate at a set of sample sizes n1 < n2 < · · · < ∞, then these sample sizes must grow at least geometrically. More precisely, nk+1/nk ≥ ρmust hold for a value 1 < ρ < 2 that increases with α. This result always rules out arithmetic sequences but ...

Journal: :Inf. Process. Manage. 2009
Robert P. Schumaker Hsinchun Chen

We examine the problem of discrete stock price prediction using a synthesis of linguistic, financial and statistical techniques to create the Arizona Financial Text System (AZFinText). The research within this paper seeks to contribute to the AZFinText system by comparing AZFinText’s predictions against existing quantitative funds and human stock pricing experts. We approach this line of resear...

Journal: :آب و خاک 0
هادی دهقان امین علیزاده سید ابوالقاسم حقایقی مقدم حسین انصاری

abstract using mathematical models for irrigation management have great impacts to increase irrigation efficiency and product amount, in fields. in this study, simulation results by swap model for moisture, compared with soil profiles moisture values, measured in the field. moisture data, measured at three wheat farms in the neyshabur plain, were used to predict moisture. results show good agre...

Journal: :Future Internet 2015
Hua Li Huan Wang Wenqing Yin Yongwei Li Yan Qian Fei Hu

To monitor multiple environmental factors of henhouses in modern chicken farms, a henhouse online monitoring system based on wireless sensor network was developed using wireless sensor technology and computer network technology. Sensor data compensation and correction were designed to be achieved using software and data fitting methods, data reliable transmission achieved using a data loss reco...

2017
Bo Cowgill Eric Zitzewitz

Despite the popularity of prediction markets among economists, businesses and policymakers have been slow to adopt them in decision making. Most studies of prediction markets outside the lab are from public markets with large trading populations. Corporate prediction markets face additional issues, such as thinness, weak incentives, limited entry and the potential for traders with biases or ult...

2012
Tobias Gerstmaier Michael Bührer Michael Röttger Andreas Gombert Clifford W. Hansen Joshua S. Stein

Forecast DNI values in hourly resolution for one day ahead are evaluated by a comparison with pyrheliometer ground measurements. Three months of such day ahead forecasts from four different providers for a site close to Questa, NM, USA are analyzed firstly by calculating the RMSE and the mean bias error. Secondly, cumulative distributions of the DNI forecast errors are calculated as they better...

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