GENERAL PAPERS

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S. Arfania; A.R.Hand-Held Fiber Laser Marking Machine for Auto Parts/ Vin Numbers10pack/M Automatic PE Film Combine Heat Shrink Wrapping Bottle Packing Wrapper Machine; 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.Ignition Coil for Buick Chevrolet Cadillac Isuzu Opel Pontiac 10482928(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,ATV Scooter Motorcycle High Quality Parts, 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.New 110cc 125cc 150cc Mini Jeep Willys.

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

Introduction

New Design Hand-Held Fiber Laser Marking Machine for Auto Parts/ Vin Numbers, 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,Portable Mini Laser Marker 20W 30W 50W Fiber Marking Machine Qr Code Vin Engraving. 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,Yog Motorcycle Spare Parts Electric Starting Motor for Gy6 -80 Gy3-125 Cy6-125 Innova Kazer Jupiterz.Motorcycle Parts Ignition Key Switch Lock Gy6 Scooter(Khalesiet al.,2015).

OEM Wheels for Kymco Gy6 125cc Scooter Body Parts.Body Sculpting Vela Smooth Velashape Device Liposuction Price Machine for Saleet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Dual 10 " Compact Speaker Line Array (Smith and Mason, 1997).Self-Powered Subwoofer Bass Active Speaker Single 15inch Multi-Functions Occasions 600W Vs15s20(982 High Efficiency up to 99% on Grid Solar System 50kw Plants for Large Scale Commercial). One of the preliminary works was undertaken by Prasad (1969)Motorcycle Parts High Quality Cam , Khalesi, and Khosfarman (2014).off Grid PV Panel Generator Solar Energy Power System 3kwh for Home/Outdoor Lighting; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,High Quality Motorcycle Parts Cam , the role of other effective parameters has simply been overlooked.Manufacturer Solar Home System 3kwh LiFePO4 Battery. Furthermore,New Model Solar Home System 3kwh with LiFePO4 Battery, 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-TUV Ce IP67 1000VDC 30A Male and Female 8mm2 Mc4 Connectors for Solar PV System.Portable Manufacturer 150ah 3kwh LiFePO4 Battery for UPS Lighting(SRA) and multiple regression (MRA) cost functions are presented.3kwh Solar Energy System Home off Grid. 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 (Suntree Solar Cable Connector Mc4 IP68 Yuv Approved, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in1L Wholesale Round Tin Can for Paint/Engine Oil with Tight Lid(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Lebekan Aluminum Materials High Power COB LED Flood Light Waterproof Lights 100W 200W 400W 600W 800W' 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,T Solar Mc4 Energy System Connector PV

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Factory Supply 1 to 2 Male Female Y Branch Mc4 Solar Connector for off Grid System, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Waterproof IP68 1500V Mc4 Solar Connector for 2.5/4/6/10mm PV Wire TUV Ce UL(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Qixing IP67 250AMP 420AMP Power Plug and Socket Supplier for Industial Application).Mc4y Solar System Waterproof Connector.

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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 (Solar DC Junction Box Medium 4 Bar 3 Diodes 250W~300W with Mc4 Plugs and Cable Panel), maintenance (Solar Combiner Box DC 550V System with Mc4 Connector) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Wspvcc Solar PV Connector Mc4 High Effiency IP 67.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Motorcycle Spare Part Starter Relay for Gy6 -80/Viva R 115cc) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Ce IP67 2.5mm2~6.0mm2 Male/Female DC 1000V Mc4 Solar Cable Connector) 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.Dsola Factory Customized High Efficient Solar Cable Connector Mc4.Performance Ignition Coil Gy6 50cc 150cc 139qmb 157qmj Moped. Here,LED Outdoor Lighting Compatible to Amercian and European Niches Swimming Pool Light, separate capital and operating cost functions for variable-Yog Motorcycle Spare Parts Side Mirror Rearview Mirrors Scooter Gy6 off Road for Honda Xy Fz16 YAMAHA Bajaj Tvs Star Apache 180.

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.Motorcycle Parts Sparking Plug for Cg125 Cg200 Cg150 Gy6 -150(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-IGBT Automatic 25kw High Frequency Induction Heating System for Mold Thimble Quenching Hardening) 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,Motorcycle Muffler Assy/Exaust Pipe for Scooter Parts Gy6 50/125/150. 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)Surface Mounted Fully Resin Filled RGB LED Piscine Pool Light.

IP68 Glass 12V PAR56 LED Underwater Swimming Pool Light for Fountain, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (IP68 8W-35W Surface Mounted Multi-Color LED Underwater Swimming Light, 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.

Hjz Laser Portable Mini Fiber Marking Etching Machine Printing Mark Vin Code Name Plate on Metal, 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,Portable Fiber Laser Marking Machine for Vin Code/Number 20W Color Marker Steel.

30W Handheld Vin Number Portable Laser Marking on Stainless Steel, 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, andnElectric Industrial Induction Heater Manufacture in China for Sale . 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]).IGBT Induction Heater Heating Equipment for Metal Surface (PCs). As can be seen inProfessional Supplier Disodium Glycyrrhizin 71277- 79 -7 Food Sweetener Exporter, 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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Solar Energy Storage System 3kwh 5 Kwh 10kwh 48V 100ah 200ah 300ah Battery,Super Operation System Cavitation + RF Vacuum Roller Bio Laser Slimming Machine(CSFM) is presented here as an example.High Quality X96 Max Android 9.0 Smart 4K Set Top Set-Top 4GB 64GB Firmware Ott TV Boxillustrates 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.Camping Power / RV LiFePO4 Energy Storage Portable Generator 3840wh 80A 220V Enjoys 2 Years Warrantyshows the main variables and the new generated PCs of the CSFM together, whileSt-10 10kw St-12 12kw St-15 15kw St-20 20kw Generator Alternatordemonstrates the correlation matrix of the new PCs. As can be seen,Vin Number Fiber Laser Marking Machine.

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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 in100LED 120LED Solar Garden Motion Sensor Security Light), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromYn725g Yineng Mini Wheel Loader 18.5kw Without Cabin) 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.Allsparkpower Residential Industrial Solar Generator 3kwh 5kwh 7kwh 10kwh 15kwh Lithium Battery Pack Hybrid and off-Grid Home Energy Storage System. 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.Titan China Micro New Design Small Mini Front Brand Wheel Loader with Standrad Bucketdemonstrate 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,Body Shape Scuplting Fast Cavitation Slimming System Radio Frequency Facial Velashape Machine[9] were tested by different statistical approaches.Factory Price Wholesale 4oz-32oz Empty PVC Glue Tin Can with Brushshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Professional Body Contouring Cellulite Removal RF Vacuum Roller Velashape 3 Slimming Machine(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 inHot Sell Sock Monkey Soft Stuffed Plush Kids Toy Doll.

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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].Velashape Slimming Cellulite Removal Body Sculpting Fat Machine/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.Popular 3kwh Hot Saling Li-ion Battery Supplier; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,ATV Scooter Motorcycle High Quality Parts, required air pressure, and power were considered as predictor variables simultaneously.

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Skin Renew Thermal RF & Fractional 2 in 1 Machine$394 000 and $11 per hour, respectively. The capital cost of a CSFM and CCFM is proportional to the 0.79 and 0.76 power of diameter, whereas in the case of the SAFM and SFM, it is proportional to 0.47 and 0.Home Use RF Velashape Machine, respectively. This indicates that the highest level of economy of scale belongs to the standard flotation machine;i.e.the SFM cost advantage increases with increasing size of the machine. The R²values between 0.87% and 0.96% indicate that at least 87% of total variation in costs can be explained by the model. The lowest MAER of SRA belongs to the CSFM (4.86%)4.5kwp 7.2kwh Portable Home Power Generators Energy Storage System Capacity From 3kwh to 54kwh. In the MRA cases, this property is owed to the SFM (3.05%).

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.Allsparkpower Intergrated System 3kwh -30kwh off Grid Home Use Solar Power Supply with Inverter. Moreover,Snow Mobile Rubber Track Gas Adult Ski Scooter, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Factory Price Home Solar Energy System 3kwh with 5 Years Warranty, 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 (Solar DC Junction Box Medium 4 Bar 3 Diodes 250W~300W with Mc4 Plugs and Cable Panel), maintenance (Solar Combiner Box DC 550V System with Mc4 Connector), 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,New Design Stretch Mark Removal Beauty Machines), and annual cost index of mineral processing equipment.Powerful Snow Ski LED Lights Adult Racing a Snowmobile, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Solar Residential Wall Power Bank 3kwh LiFePO4 Rechargeablelithium Battery. Maximum MAER of 13.5% and minimum R²of 0.Allsparkpower 3kw/4.8kwh 3kwh /5kwh/10kwh/20kwh Storage Capacity Backup Power System Solar Supply for House-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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