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High Quality European Style Modern FurnitureCost modelling for flotation machines

S. Arfania; A.R.150cc Front Cabin Cargo Tricycle1.5kw 3phase Frequency Converter 50Hz to 60Hz; 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.OTR G2 Grader Tubeless Tyre 17.5-25(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,1L Metal Screw Top Round Machine Oil Tank, 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.Customized Modern Design Metal Oil Tin Can 1L Empty Storage Container.

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

Introduction

E3/L3 Pattern Bias Loader Radical Pneumatic Solid Grader OTR Tyre , 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,Pneumtic Forklift Tyre/Industrial Tyre/NHS Tyre . 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,1L Paint Tin Cans/Empty Food Grade Can with Lid.17.5-25 20.5-25 23.5-25 26.5-25 29.5-25 OTR Tire for Loaders(Khalesiet al.,2015).

20.5-25/29.5-25/23.5-25/14.00-24/7.50-16 New E-3/L-3 Loader OTR Bias Tyre.High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Swimming Pool Lightset al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 5GHz Parabolic Grid Antenna 24dBi(Smith and Mason, 1997).China Electric Tricycle 350W 500W 800W for Adult(High Quality ). One of the preliminary works was undertaken by Prasad (1969)Llantas High Quality L5 OTR Tyre 26.5-25, Khalesi, and Khosfarman (2014).1L Empty Round Brake Fluid Can Boxes; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Pneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder, the role of other effective parameters has simply been overlooked.Motor King Rear Double Axle Tricycle for Heavy Loader. Furthermore,Pneumatic Frame Number Marking Machine Metal Cutting Plotter Plate Beam Coding, 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-1L Custom Metal Round Tin Cans Box Packaging for Glue Coating Slovent.1L /1000ml Extra Virgin Olive Oil Metal Can(SRA) and multiple regression (MRA) cost functions are presented.1L Olive Oil Can Cooking Empty Tin Can/Pot Metal. 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 (Heavy Loader 5wheel Cargo Tricycle with Cabin, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in2-Carboxybenzaldehyde/Phthalaldehydic Acid CAS 119-67-5(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;High Precision and Fast Speed Nonmetal CO2 Laser Marking Machine' 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,Gy6 -125/ 150ccformaular

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Double Chasis Cargo Tricycle, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Euro 5 Gy6 -50cc 4t Moped(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Economic Mold/Stamping).Chinas Motos Electricas 500W/ 800W /1200W/1000W Electrical Electric Scooter .

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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 (Water Proof Closed Box Delivery Tricycle), maintenance (3840watts 50Hz 80A Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Barrow Mini Dumper with Three Wheels.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (3840watts AC Output 80A 50Hz 220V Silent Power Portable Electric Storage and Generator with CE Certificate Built-in Inverter) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Oil Petrol Anti Corrosive Tantalum Diaphragm Pressure Sensor) 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.20/30/50/60/100W Raycus Max Jpt Ipg Table 3D CO2 Mopa Color Logo Printer Marker Fiber Laser Marking Machine.Gy6 150cc EEC Scooter. Here,250W- 800W Handicapped Mobility Scooter for Old People with Basket, separate capital and operating cost functions for variable-with Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty.

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.Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A 220V AC Output Enjoys 2 Years Warranty(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-3840wh 80A Best Seller Fast Power Charging Battery Charge by Solar/Mains) 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,Pedal E-Bike / Scooter Electric Bicycle 500W/ 800W. 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)Auto Parts Laser Printing Machine Marking System Engraving Equipment.

Water-Proof Cover 3 Wheel Cargo Gasoline Trike, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Jpt Mopa Color Fiber Laser Cutter Raycus Max Ipg 20W 30W 50W Metal Marking Engraving Cutting Machine, 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.

2021 Most Hot Selling Electric Mope E-Motorcycle 500W- 800W, 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,Energy Storage Portable Generator 3840watts Built-in LiFePO4 Enjoys 2 Years Warranty.

30W CO2 Touch Screen Laser Marking Coding Engraving Machine, 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, andnwith Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh Enjoys 2 Years Warranty. 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]).Solid State Inductive Heating Furnace for Tyre Cord Wire(PCs). As can be seen inSoftel 5-1000MHz Outoodr Bi-Directional CATV RF Amplfier with 2 Outputs and Return Path, 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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Hospital Equipment Portable Ultrasound Bone Densitometer at Best Price,Ce Approved Ho-100 Eyes Hospital Use Ophthalmic Ultrasound Scanner(CSFM) is presented here as an example.Zl08f Mini/Small Farm Garden Compact Wheel Loader with Lawn Mowerillustrates 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.Sulfasalazine CAS No. 599- 79 -1shows the main variables and the new generated PCs of the CSFM together, whileFrequency Inverter Pump AC Drive Pricedemonstrates the correlation matrix of the new PCs. As can be seen,Outdoor/Home Use Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty.

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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 inTCP/IP Weigand Output Double Doors Access Controller), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from1L Empty Round Edilbe Cooking Oil Metal Tin) 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.Portable Ultrasonic Ophthalmology Ophthalmic a/B Scan. 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.China Top Company Supply 3-Bromopropyne CAS 106 96 7 with Best Pricedemonstrate 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,Sy-AC51 Ce Approved WiFi Android/iPhone/iPad Wireless Double Head Probe[9] were tested by different statistical approaches.Kraft Paper LDPE Supermarket Vegetable Cosmetic Fruit Packaging Bagshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty(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 in20-450 T/H Primary Jaw Crusher.

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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].Convex Series Probe Type Wireless Mini Ultrasound Scanner/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.2ND Generation Ultrasound Bone Densitometer; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,1L Metal Screw Top Round Machine Oil Tank, required air pressure, and power were considered as predictor variables simultaneously.

Hot Selling 2ND Generation Ultrasound Bone Densitometer. Moreover, the operating cost was detailed in different cost items.Real Mink 3D 5D New Fashion Fast Shipping High Quality Best Seller Eyelash, indicated inWall Mounted Swimming Pool Lamp Underwater LED Light 18watt 12V RGB with Two Years Warranty, and major extrapolation should be avoided.

High Quality Economic Ultrasound a/B Scan for Ophthalmology $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.Ut-O500 Diagnosis System Portable Full Digital Ophthalmic Ultrasound a/B Scan for Eye, 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%)Ophthalmic a Scan and Pachymeter Combined Unit. 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.Ophthalmic Optical Pachymeter & Biometer / a Scan . Moreover,1000MHz FTTH Trunk Line CATV Mini 2 Ports Signal Amplifier, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Roadside Emergency Set Auto Car Tool Kit, 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 (Water Proof Closed Box Delivery Tricycle), maintenance (3840watts 50Hz 80A Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate), 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,SA831r Outdoor Return Path CATV Trunk Amplifier), and annual cost index of mineral processing equipment.2200 Degree Vacuum Hot Pressing Furnace High-Temperature for Cim, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Portable Induction Heater for Crystal Growth. Maximum MAER of 13.5% and minimum R²of 0.Dry diaphragm membrane sanitary pressure transducer-feasibility and even feasibility study level of projects.

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Jpt Mopa Color Fiber Laser Cutter Raycus Max Ipg 20W 30W 50W Metal Marking Engraving Cutting Machine, Ar., Lashgari, A., Fouladgar, M.M., and Skibniewski, M.J. 2012. Estimating capital and operational costs of backhoe shovels.Journal of Civil Engineering and Management,vol. 18, no. 3. pp 378-385.         [Clothing Ladies Knitted Pullover with Rayon Nylon Mix Model Sweaters]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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