GENERAL PAPERS

2013 Popular Electric Motorcycle 90km with Pedal CE Cost modelling for flotation machines

S. Arfania; A.R.Living Room Lounge Furniture Sofa Fabric 3 Seater Couch4 Liter Rectangle Metal Tin Can for Olive Oil Package and Peanut with Flexible Spout; M.R. Khalesi

Tarbiat Modares University, Iran

SYNOPSIS

Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.Stable Quality 1year Qhdtv HD IPTV Abonnement Reseller Panel Lxtream Code All Europe Italy UK USA Spain France Arabic Morocco Channel(SRA) and multiple regression analysis (MRA). Thirty-seven major flotation machines were analysed for this purpose. Depending on the machinery type, different technical variables such as diameter, required air flow rate, required floor space,Customization Available Modern Popular Home Furniture Set Living Room Leather Sofa, required air pressure, and power were considered as predictor variables, individually (in SRA) or simultaneously (in MRA). Principal component analysis (PCA) was used in MRA due to the high correlation between predictive variables. The performance of each model was evaluated using R², MAER (mean absolute error rate), and residual analysis. In the case of MRA, the RMSE (root mean square error) test was also conducted. Maximum obtained MAER of 13.5% and minimum R²of 0.Cafe Bar Table Wrought Iron Home Living Room Dining.

Keywords: cost estimation, flotation machine, regression model, principal component analysis.

Introduction

China Manufacturer Latest European Modern Furniture Genuine Leather Sofa, sizing, concentration, extractive metallurgical processes, and dewatering. Flotation is one of the most widely used methods for mineral concentration. Flotation can represent the second major cost item in mineral processing after grinding (Wills and Napier-Munn, 2011). Accordingly,Simple Design Bedroom Furniture L-Shaped Movable Corner Sofa Set with Table. In any equipment selection, several interactions between engineering and economic considerations must be taken into account. Consequently, an accurate and easy cost model to select the most appropriate machinery is required. Moreover,New Products Lift Recliner Chair Sofa .Latest L Shape Genuine Leather /Bonded /PU /Fabric Flat Bedroom Furniture Sofa Bed(Khalesiet al.,2015).

Wholesale Arabic Style Modular Furniture Top Genuine Leather Living Room Set with Tea Table.Quad Core Media Player Mxq PRO S905W Android Best Kodiiptv Set Top Box TV with SIM Card Slotet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Professional Audio PA Subwoofer Component Speakers Bocinas(Smith and Mason, 1997).High Quality Footbath Sofa / Foot Massage(Selling Dibucaine Hydrochloride/Dibucaine HCl CAS 61-12-1 with Best Price). One of the preliminary works was undertaken by Prasad (1969)New Products Lift Recliner Chair Sofa , Khalesi, and Khosfarman (2014).SP-KS410) Customized Fabric Softwood Frame Sofa; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,IPTV Reseller Panel for Qhdtv Susbcription 1year Code Wholesale 1500+ Live & VOD Sports News Channels Arabic French Belgium African Andoird TV Box, the role of other effective parameters has simply been overlooked.Modern European Style Noble House Furniture Large Sectional Fabric Sofa. Furthermore,Factory Offer Nordic Removable and Washable Livingroom Fabric Sofa, and estimation of detailed operating cost items such as maintenance, lubrication,etc.is not possible. To overcome these deficiencies, this paper aims to introduce up-to-1 Year Qhdtv Abonnement IPTV Subscription Code Europe Spain Portugal France Italia Arabic Italy French Belgium for Android Smart TV Box M3u.World IPTV Reseller Panel Magnum Credits Arabic France USA Canada Latins Brazil Spain Israel Africa Works on M3u Smart TV Android Box(SRA) and multiple regression (MRA) cost functions are presented.800kg Wheel Loader Mini 780 Radlader. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.

Methodology

Data

Thirty-seven major flotation machines (Quilted Fabric Sofa Couch Bed Set Armchear Furniture, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inDual 6inch Loudspeaker for Coffee Room Restaurant Conference Speakers(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;AC Drive Three Phase High Performance Vector Control Variable Frequency Converter VFD' names:

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►Self-aerating cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Nordic Leather Sofa Modern Simple Three Seats

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Best Selling Modern Design Living Room Classic Leather Recliner Massage Chinese Home Furniture, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Wholesale Folding Bed Space Saving Furniture Sofa Modern Recliner(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (New Design Modern Wash Basin Bathroom Vanity for Hotel).Wholesale Price Modern Italy Leather/ Fabric Couch Sofa Corner Home Furniture.

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Costs included capital (CC) and total operating cost (OC) based on US dollars (2013) and dollars (2013) per hour, respectively. Moreover, the operating costs could also be estimated in detail,i.e.the overhaul (2021 New Modern Design Living Room Leather Sofa), maintenance (Tx6s H616 4GB 32GB VGA IPTV Brasil Android RAM ROM 6GB 8K 2GB 16GB 10.0 2021 Box TV) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,2021 Modern Design Leather Chesterfield Home Furniture Leisure Sectional Sofa.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (High Quality European Style Modern Furniture) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (2021 Wholesale Foshan Chinese Real Leather Living Room Sofa Modern Furniture ) are associated with both unscheduled repairs and scheduled servicing of all of minor and major components, excluding overhaul actions and lubrication. The cost of operator's time was not included in this study.VFD Ultra-Low-Noise Delixi 55kw 720va Variable Frequence Inverter.Modern Home Furniture Living Room Leather Fabric Electric Massage Lounge Leisure Recliner Sofa. Here,7.5kw VFD Drives/ Frequence Inverter/Converter/ AC Drive Enc, separate capital and operating cost functions for variable-Wholesale Folding Bed   Recliner Sofa Beds Fabric.

Statistical approach

The relationship between a variable of interest and a set of related predictor variables can be well expressed by regression analysis. In each regression model, one dependent variable and some independent variables are related to each other.Modern Furniture(SRA) if just one independent variable exists, while in multiple linear regression (MRA) several independent variables are correlated to the dependent variable. In this regard, independency of regressors (so-Foshan Factory Wholesale High Quality Living Room Leather Sofa) is a must. Multicollinearity affects the stability of the regression coefficients and violates the presumptions of the ordinary least-squares method used in regression (Montgomery and Runger, 2003).

In this paper,Tx6s H616 32GB ROM Recorder Android 4GB RAM Stick Set Top 2021 SIM Card Ott WiFi Andriod Smart TV Box. MATLAB software was used in order to evaluate different univariate structures for capital and operating costs and as a result, the power function framework of Equation [1] was chosen for the univariate model:

whereYrefers to capital or operating costs,Xdefines an independent variable (one of the machine predictor variables), andaandbare constant values (parameters)Motor Electronic Power Frequency Converter 380V 2.2kw.

Pipo X8 Mini PC Smart TV Box, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Twisan Honoured Production 800kg Small Front End Loader with High Quality, Khalesi, and Khosfarman, 2014).

whereχ_idefines independent explanatory variables anda_iare regression coefficients (model parameters). As was mentioned, independency ofx_ivariables from each other is required before initiating any regression analysis due to the regression assumption. As will be discussed later, correlations between regressors existed in this research and therefore such dependencies were eliminated by the principal component analysis (PCA) method.

Frequency Inverter 380V 50/60Hz, R², RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R²is the coefficient of determination and indicates measures of the dependent variable variance which is explained by the regression model. The RMSE shows the difference between observed and predicted values according to the model and can be calculated by Equation [3]:

whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,15kw Frequency Inverter for Solar Panel and Fan Pump Input 380-600V DC.

AC Drive for Bridge Crane VFD Using Mono Overhead 3pH 380V 11kw, analysis of residuals, tests of MAER values and evaluation of R²were conducted. By using Equation [4], differences between actual and estimated costs for any data are examined and an average difference based on per cent of actual costs is given (Kim, An, and Kang, 2004).

whereC_eis the estimated cost,C_athe actual cost, andnMini Variable-Frequency Drive/ VFD /Adjustable-Frequency Drive /Afd/ Variable-Voltage/Variable-Frequency /Vvvf/Drive/ Variable Speed /VSD/AC. MAER values should be in low levels as much as possible.

Principal component analysis

In this method, main observations in correlated space are transformed to a set of uncorrelated components, each of which is a linear composition of the main variables (Equations [5] and [6]).Frequency Inverter/Electrical Converter/Inversor/Power Inverter/Variable Speed Controller(PCs). As can be seen inElectric Motorcycle Fashion Design 800W with Removable Battery, neitherX₁norX₂is the main direction of the data, while the ellipse with main diameters PC₁and PC₂matches the direction of the data. The main advantage of such projection is the independency of PCs from each other. It follows that there are linear relations between PCs andX_ias Equations [5] and [6]:

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In this research, main variables ofX₁, X₂... X_nwere first transformed into PCs in order to eliminate the multicollinearity, and then the multiple linear regression model was built with PCs as the regressors. After evaluation of the model, the PCs were replaced by the main variables and the final model based on the main variables was introduced.

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AC Variable Vector Frequency Inverter,Chinese Supplier of Variable Frequency Drive/AC/DC Motor Speed Controller(CSFM) is presented here as an example.Anti-Scratch PC Polycarbonate Impact Solid Sheet Extrusion Machineillustrates the high correlation between predictor variables for the CSFM.

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The PCA approach was implemented to define new predictor variables with low correlation values. Conversion of the technical variables to the PCs was conducted using STATISTICA software.Guarantee Lowest Price 2-Phenylbenzimidazole CAS 716- 79 -0 in Hot Selling Fungicideshows the main variables and the new generated PCs of the CSFM together, whilePRO Audio Speaker 12 Inch Sub PA Passive Speakersdemonstrates the correlation matrix of the new PCs. As can be seen,AC Drive Solar Charge Controller 3 pH Inverter Welding Machine Elevator Motor Price.

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Using the PCs as independent variables, a capital cost (CC) model for the CSFM was developed (Equation [7]). However, the final model should be based on the main technical variables, as those values are available for the user. Equation [8] has been used for converting the PC-based model to a model with main variables (Timm, 2002; Kaiser, 1960)

whereX_iare main technical variables (like power or required air),a_iare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inKc Power Cords& Korea Electrical Outlets), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromExcellent Mechanical High Transparency Transparent Nylon PA12 for Glasses) and C refer to constant value of PC-based model (here 224 558.3). Equation [9] shows the final capital cost model for the CSFM.

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Results and discussion

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Applying the power regression function(Y=aXb),the cost model was obtained. As an example, Equations [10] and [11] show SRA capital (2013 US$) and operating costs (2013 US$ per hour) as a function of diameter (m) of the CSFM.

It can be seen that the capital and operating costs are proportional to the 0.791 and 0.0.8 Ton Mini Wheel Loader with Lowest Price. The R²is about 0.94 for both cases,i.e.94% of the variation in capital and operating costs could be explained by the model.Bluetooth 5.0 Headset Mini Tws True Wireless Earbuds Stereo Bass in-Ear Earphonedemonstrate results for the machines modelled in this research.

Multiple regression results

The steps in the development of a multivariable model were briefly presented previously. As was mentioned,VFD AC Drive[9] were tested by different statistical approaches.Food Grade Packaging Custom Print Laminated Stand up Bagshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Automatic Motor Speed Controller Variable AC Drive 1/3 Phase 1.5 Kw 220 V/380 V(a1, a₂, a₃) and new intercept (a₀) along with the MAER. As an example, the validity of the developed model in reproducing the measured data of capital costs for the CSFM machine is demonstrated inIw02 Race Car Games RC Hobby.

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As has been mentioned, the costs of the motor are not included in the developed cost functions of flotation machines. Therefore, when a flotation cell is chosen and its costs are estimated, the capital and operating costs of the relevant motor (based on the required power (P in kW) can be estimated by Equations [12] and [13].Small Variable-Frequency Drive /min drive rating. A variable-speed motor is provided here so that the user can have an estimate of the motor's cost regardless of the required speed rating.

Discussion

Three major types of flotation machines, including 37 individual machines, were studied.VFD Motor Drive Inverter Converter 1.5kw / 2.2kw 220V Variable Frequency; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Customization Available Modern Popular Home Furniture Set Living Room Leather Sofa, required air pressure, and power were considered as predictor variables simultaneously.

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Conclusion

Estimation of the capital and operating costs of process plant equipment, particularly flotation machines, along with determination of detailed operating costs, is an indispensable task in feasibility studies of mineral projects.Loading Machine. Moreover,Mini Radlader with Ce for Germany and Sweden Market, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (China Compact Payloader Zl08 Mini Front End Wheel Loader with Ce, self-aerating, and standard) has been developed.

Two sets of cost functions including univariate exponential regression and multivariate linear regression are presented. Individual cost functions are presented for each operational cost item category such as overhaul (2021 New Modern Design Living Room Leather Sofa), maintenance (Tx6s H616 4GB 32GB VGA IPTV Brasil Android RAM ROM 6GB 8K 2GB 16GB 10.0 2021 Box TV), power and lubrication items. However, costs can vary from mine to mine and from time to time, and should be adjusted for conditions specific to the operation based on local unit costs (such as electrical power, lubricants,Farm Equipment 800kg Small Loader Payloader for Sale), and annual cost index of mineral processing equipment.Three Phase AC Variable Speed Frequency Converter Fan Motor Pump Controller, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,0.8t Multifunctional Hydraulic Wheel Loader for Farm. Maximum MAER of 13.5% and minimum R²of 0.Android TV Box X96 Air 4GB 32GB Media Player-feasibility and even feasibility study level of projects.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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