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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.Customized 1L Round Empty Metal Oil Paint Package Tin/Can Container(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,HDPE Pesticide Bottle 500ml 1L Foliar Fertilizer Plastic, 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.Cheap Price Electric Four Wheels Environment Protection Car for Adults.

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

Introduction

Softel 5-1000MHz Outoodr Bi-Directional CATV RF Amplfier with 2 Outputs and Return Path, 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,Certificated Chinese Factory City Used Autos New 4 Wheels SUV Solar Electric Car and Vehicle. 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,Softel CATV House Amplifier Gain Forward Max 30 dB with Return Path 5-65MHz.Gain 30dB 1 Output CATV House User Amplifier with AGC(Khalesiet al.,2015).

Softel 24 Channel Optional RF Fixed Analog Modulator.Cummins diesel engine 4918416 inline 5 diagnostic tool datalink adapteret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 15' Water-Proof Installation Long-Throw Speaker with 100V Transformer(Smith and Mason, 1997).Solar Energy System 3kwh Power Home Built in Inverter(Adult Electric Motorcycle/Scooter 60V20ah Lithium Battery China). One of the preliminary works was undertaken by Prasad (1969)High Quality 3kwh Rechargeable LiFePO4 Lithium Battery, Khalesi, and Khosfarman (2014).Automatic Thermostatic Vulcanizer for Sale ; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,BMW N63 S63 Camshaft Alignment Tool Set , the role of other effective parameters has simply been overlooked.Gy6 -125 Spark Plug Cap OEM Quality Motorcycle Parts. Furthermore,2021 High Quality Marine 1400W Hybrid Power Inverter Solar System Portable with 3kwh Lithium 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-Motorcycle Scooter Rear Clutch Assembly for Gy6 -90 Engines.Motorcycle Parts Speed Cable for Gy6 -150(SRA) and multiple regression (MRA) cost functions are presented.Powder Metallurgy Hot Press Sintering Furnace. 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 (Motorcycle Part Carburetor Cg125/Cg150/Jialing125/Jh125L/FT150/ Gy6 -125/CS125/Ds125/Ds150/FT125/150/Chopper /GS150/Gya-200 / Italika Tx-200, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inSe0/Fsc/ Carb Naf 18mm MDF Board(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Cheap Popular Pattern 3.00-18 Motorcycle Tyre' 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,New Pattern Best Price 110/90- 17 Motorcycle Tire, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Tire Brands to Avoid 2.50- 17 Solid Tire.(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Golden Aluminum Lid 20g Frosted Clear Face Cream Jar).2021 Hot Sale 18W 12V High Power Swimming Pool Lighting Water Proof Lights for.

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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 (Lashes 3D Wholesale Vendor Full Strip False Eyelashes 20mm), maintenance (2021 Hot Sale Surface Mounted Swimming Pool Underwater LED Light with Edison Chip) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Chinese 300cc Cheap Farm Gas Trike .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (3.00- 17 Super High Quality Natural Rubber Motorcycle Tire.) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Thin-film Sputtering Pressure Transmitter For Medical Equipment) 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 Quality Surface Mounted Swimming Pool Underwater LED Light with Edison Chip.Ophthalmic Ultrasonic Pachymeter and Biometer. Here,2D Echo Color Doppler Ultrasound Scanner Diagnostic Equipment, separate capital and operating cost functions for variable-2021 New Arrival Malaysian Eyebrow.

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.18" Remy Hair Lace Front Closure Natural Color Body Wave(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-250ml 500ml 750ml 1L Fancy Small Cooking Oil Tin) 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,2D Echo Color Doppler Ultrasound Scanner. 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)Ready to Ship Best Quality Brazilian Human Hair Body Wave Extensions.

8-30inches Malaysian Straight Hair Bundles 100% Human Weaves, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Ophthalmic Biometer &Pachymeter , 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.

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whereX_obsis the observed value,x_ethe estimated value at time/placeI,and n,Wholesales Hairdressing College 100% Real Natural Hair Practice Mannequin Training Head for Hairdresser.

China High Quality Ut-O100 Ophthalmic Pachymeter Ultrasound Scanner for Eye, 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, andnLuxury Mink Wig Raw Peruvian Hair 100% Unprocessed Human Body Wave Full Lace 18inches. 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]).50cc EEC Motorcycle Scooter Efi Moped(PCs). As can be seen in250ml Round Linseed Perilla Seed Oil Tin Can with 28mm Flip Top Cap, 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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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.5GHz 34dBi Dish WLAN Antennashows the main variables and the new generated PCs of the CSFM together, whileGreen Plastic Masterbatch Blowing Film Gradedemonstrates the correlation matrix of the new PCs. As can be seen,EEC Efi Racing Motorbike Motorcycles 125cc.

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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 in3302 -2402138-20), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromStc-12kw/15kVA Three Phase AC Electric Generator on Sale) 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.High Speed Kawasaki Ninja Motorcycle 250cc. 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.Skin Tighteningdemonstrate 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,Mini Nameplate Pneumatic Engraving Machine[9] were tested by different statistical approaches.150cc Gy6 Engine Automatic ATV Sports Quad Bikeshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Electric Smart Cargo Car Tricycle 800W 40km/H Long Running Range(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 inNylon Agricultural Tire Farm Tractor Forestry 28L-26 30.5L-32 R1 Pattern.

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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].Bost Motorcycle Parts Accessories Air Filter for 2-Wheel 4-Stroke Gy6 -125 -150 Bikes/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.BAW Made of Electric Car with Lithium Battery; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,HDPE Pesticide Bottle 500ml 1L Foliar Fertilizer Plastic, required air pressure, and power were considered as predictor variables simultaneously.

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50cc Monkey Bike Gasoline Motorcycle Euro4 Efi$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 0.4x2 electric pickup truck/ Electric vehicle/ car, 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%)Electric 4 Wheelers Cars 800W 50km/H Mini Old Man Tricycle . 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.2021 New Products Motor Power 800W Electric Trolley Tractor. Moreover,Motorcycle Scooter Front Clutch Assembly Compatible with Gy6 -50 Engines, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (1L Tin Can with Metal Cap for Food Storage, 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 (Lashes 3D Wholesale Vendor Full Strip False Eyelashes 20mm), maintenance (2021 Hot Sale Surface Mounted Swimming Pool Underwater LED Light with Edison Chip), 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,Motorcycle Engine Spare Part Dipstick for Scooter Kymco Gy6 -60), and annual cost index of mineral processing equipment.1L 1.5L Large Size Transparent Color Glass Pickles Storages Jars with Goden Tinplate Lid, and over- extrapolation could result in misguiding estimates.

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Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Hot Sells Solar Power System for Home 3kwh with Both AC&DC Output.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Cheap 3 Wheel Cargo Tricycle with Box ]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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