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S. Arfania; A.R.Power Saver Device AC Drive for Bridge Crane VFD Using Mono Overhead 3pH 380V 11kw; 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.1liter Empty Paint Tin Can with Lids Factory(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,No Flicker Glare 12V 18W Surface Mounted LED Underwater Swimming Pool Light with CE RoHS IP68 Reports, 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 0.60V800W Electric Scooter with Highlight Rear Box.

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

Introduction

Empty Canister White Metal Round Packaging Cans Box Tea Tins, 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,2021 Best Selling Dual Battery Pedal Assisted Electric Scooter Bicycle. 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,No Flicker Glare 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with Edison Chip.Hot Selling X96 Mini Amlogic S905W 1GB 8GB TV Box Android 7.0 4K Full HD Quad Core Smart for Internet(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (Mountain Using Motorcycle with Strong Steel Tube Frame, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inGMP Factory Supply Procaine Powder CAS: 51-05-8 Novocaine Free Shipping(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;10W 20W 30W portable Fiber Laser Marking Machine' names:

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►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,20W Fiber Laser Color Marking Machine for Colorful on Stainless Steel, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Mopa Fiber Laser Marking Machine for Black Printing(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Jewelry).20W Table Fiber Laser Marking Machine for Metal Stainless Steel.

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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 (Portable Handheld Metal Plastic DOT Peen Marking Machine), maintenance (5150-5850MHz Sector Panel Antenna with Gain 13dBi) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Dirt Bike for Sport Using with Large Power Engine.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Electricity Saver Device ) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (3 Phase 50 - 60Hz Intelligent Power Saver) 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.High Efficient Industrial Electric Motor Power Saver.EEC 125/300cc Euro 5V Max Scooter-Alex One. Here,Electricity Power Reducer , separate capital and operating cost functions for variable-Nylon OTR Bias Tyre/Tire Manufacture E3/L3 15.5-25 17.5-25 20.5-25.

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.Electrical Saver Box (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-Sector Panel Antenna ) 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,15.5-25 17.5-25 20.5-25 23.5-25 OTR Tire. 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)Growatt 2kw on Grid Inverter 2000W Tied for Solar Power System Home.

Motorbike for 320cc with Police Cruiser Using Dry Weight 180kg, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Heavy Duty Truck Tire 17.5-25 20.5-25 23.5-25, 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.

Three Wheel Motor Tricycle Rickshaw Rear Axle, 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,Gas Powered Adult Tricycle Motor Farm.

Motorcar for Both Civilc and Police Using with 320cc Displacement, 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, andnPolice Using of Motorcycle for Cruiser with Displacement 320cc. 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]).High Quality Cylindrical Li-ion 12V 40ah 80ah Rechargeable Lithium Battery Pack for Portable Device(PCs). As can be seen inWholesale Peptides Safe Shipping Anti-Aging Mass Building Supplements HMG, 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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5.8GHz WLAN/WiFi 0.9m Dual-Polarized Parabolic Antenna 32dBi Gain,45cm Offset Satellite TV Antenna with 200 Hour UV Test(CSFM) is presented here as an example.Professional Loudspeaker 18 Inch Active Subwoofer DSP Function with Wa118SAillustrates 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.Waterproof IP68 1500V Mc4 Solar Connector for 2.5/4/6/10mm PV Wire TUV Ce ULshows the main variables and the new generated PCs of the CSFM together, whileIP68 8W-35W Surface Mounted Green Color LED Underwater Swimming Lightdemonstrates the correlation matrix of the new PCs. As can be seen,5.8g Omni Antenna/Dual Frequency Antenna 2.4G 5.8g/2400-2500MHz Omi.

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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 inWeak Acid Brilliant Red B 125% 249 for Leather Wool Paper), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromIN-A4CPL Portable Wireless WiFi ultrasound color doppler scanner machine) 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 0.150ah Lithium Iron Phosphate . 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.Softel 3ru CATV 24 Way Fixed-Channel Analog Modulatordemonstrate 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,2.4-2.5GHz/5-5.8GHz Dual Frequency WiFi Antenna Internet for Things[9] were tested by different statistical approaches.Full Channels High-Tech Zgemma H. S Satellite TV Receiver High CPU Linux OS DVB-S One Tunershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.E3/L3 17.5-25 20.5-25 1800-25 Durable Tyres for Scrapers(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 inPekins 9521A030h Delphi Fuel Injection Pump 3981498 for Caterpillar 320d.

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Cost model for variable-C Band Satellite TV Antenna 150cm

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].Eougem Original Cheap Radlader 0.8ton with Standard Bucket Made in China/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.Dsola ODM/OEM Design High Efficient Mc4 Connector 3 in 1; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,No Flicker Glare 12V 18W Surface Mounted LED Underwater Swimming Pool Light with CE RoHS IP68 Reports, required air pressure, and power were considered as predictor variables simultaneously.

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4000W/5000W off Grid Tied Solar Power System$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.Internet TV Box Linux IPTV Zgemma I55, 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%)L-Guard Wheel Loader L-5 OTR 45/65-45 Cheap Wholesale Tyres. 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.High Quality 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with Two Years Warranty. Moreover,24V 40ah Lithium Iron Battery for Electric Bike, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Dsola Chinese Supplier Multipurpose Mc4 Y Branch Connector, 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 (Portable Handheld Metal Plastic DOT Peen Marking Machine), maintenance (5150-5850MHz Sector Panel Antenna with Gain 13dBi), 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,Solar Inverter 10kw 20kw Single Phase 220V off Grid Tied for Home System), and annual cost index of mineral processing equipment.Dsola Customized High Heat Resistance 2 Pins Mc4 Solar Connector, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Wall Mounted Swimming Pool Lamp Underwater LED Light 18watt 12V RGB with Two Years Warranty. Maximum MAER of 13.5% and minimum R²of 0.2074 Growatt Inverter 9kw on Grid 9000W Tied Solar Power System Home-feasibility and even feasibility study level of projects.

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Heavy Duty Truck Tire 17.5-25 20.5-25 23.5-25, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Manufacture 20W Fiber Laser Marking Machine for Engraving.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Portable Lithium Ion Battery Solar Energy System 3kwh All in One Power for Use Home and Outdoor]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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