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S. Arfania; A.R.Automatic Tool Changing CNC Router with 9kw Hsd Spindle. Wood Door Carving Atc15kw Frequency Inverter for Solar Panel and Fan Pump Input 380-600V DC; 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.Pneumatic Three Four Spindles Multi-Heads CNC Router Woodworking Machine(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,Disc Atc Automatic Tools Changer Wood CNC Router Woodworking Machine, 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.Tank Dust Removing Machine with Filter Cartridge.

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

Introduction

Quadrant Stainless Steel Shower Room with 8mm Tempered Glass, 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,HDPE Water/Gas Supply Pipe Extrusion Machinery. 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,Factory Price 1325 Atc CNC Router Automatic Tool Change Machinery.HDPE Water/Gas Supply Pipe Extrusion Equipment(Khalesiet al.,2015).

45cm High Tray Toughened Glass Curved Quadrant Shower Cabin.Bathroom 8mm Glass Full Arc Quadrant Enclosed Shower Dooret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Wholesale Colorful Customize Printing Food Grade Water Proof Skin Patches Small Aluminum Foil Packing Bags with Zip Lock(Smith and Mason, 1997).Plastic Pipe Production Extrusion Line(Hot Selling Tricycle 250cc/ 300cc Three Wheel Motorcycle). One of the preliminary works was undertaken by Prasad (1969)Wholesale Plastic PVC Drainage Sewer Water Supply Electrical Conduit Tube Pipe Production Extrusion Line, Khalesi, and Khosfarman (2014).New Quadrant Shower Enclosure with One Pivot Door; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Offset Quadrant Enclosure Bath Room Tempered Glass Shower Cabin Cubicles, the role of other effective parameters has simply been overlooked.China Direct Supply CAS No.: 63428-84-2 Polyamide Resin for Untreated Film. Furthermore,Quadrant Framed Grey Glass Shower Enclosure Sliding Door Simple Room, 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-HDPE PE PPR Pipe Making Machine.NBR Nitril 80 Duro Rubber X Ring /Quad(SRA) and multiple regression (MRA) cost functions are presented.EPDM 50 Duro As568 Rubber O Ring. 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 (Cheap Price Nice Mini Seal Viton/FKM X Rings, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inFamily Usage Embossed Vacuum Bags for Food(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Rectangle Sliding Strip Glass Door Quadrant Bathroom ' 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,Wear-Resistant PU O Ring

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Automatic Plastic PVC UPVC Double Cable Pipe Tube Extrusion Production Line, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Acrylic Film Quadrant Frosted Glass Shower Cubicle with Low Tray (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (MS-500) Medical Equipment Oxygen Concentrator).Plastic PVC CPVC UPVC Sewage/ Pressure Pipe& Electrical Conduit Cable Pipe/Tube /Single Corrguated Pipe .

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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 (Plastic HDPE Pipe Production Line), maintenance (China Reliable Supplier Portable Cement Silo Dust Collector) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Dust Collector for Granite Welding.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Dust Collector Cages Surface Grinding Machine) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Dust Collector Hammer Mill Shaker) 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.Gold Dust Collector Cement Filter Bag.Low Water Absorption Polymer 610. Here,High Impact Strength and Low Water Absorption Resin 610, separate capital and operating cost functions for variable-CAS No. 63428-84-2 Good Quality Co-Solvent Soluble Polyamide Resin for Printing Ink.

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.Plastic PE Pipe Production Line(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-Non Standard Eco Friendly Rubber Seal O-Ring) 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,High Quality Elasticity Competitve Nitrile X Ring. 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)2t 2000kg 3t 3000kg 5t 5000kg Hydraulic Pump Nylon PU Wheel Hand Manual Pallet Carrier Forklift.

King Quenson Customized Label Deltamethrin 2.5 Ec China Supplier, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Insecticide Deltamethrin powder 5% WP 2.5% EC, 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.

Pesticide Deltamethrin 98% TC, 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,King Quenson Best Selling Deltamethrin 2.5% Wp Insecticide Manufacturer.

Pest control Flies Cockroaches Mosquitos spray Deltamethrin 2.5%SC, 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, andnShower Enclosure/ Cabin/ Glass Sliding Door for Bathroom: Quadrant Cabin AS-2800. 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]).Plastic PVC/CPVC Electricity Conduit Tube/ Water Sewage Pressure Pipe/Gas Hose/ Profile/Sheet Extrusion &Extruding Production Line Price(PCs). As can be seen inAC Converter Variable Frequency Drive 3 pH 0.75kw Output Power Supply, 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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Water/Gas-Supply PP PE HDPE Plastic Pipe/Tube Extrusion Making Machine,Jwell Plastic PVC Water Sewage/ Pressure& Electricity Conduit Pipe/Tube/ Window Profile/Sheet (CSFM) is presented here as an example.Electrical VFD Frequency Inverter Three Phase 220V 380V 7.5/11kw for Solar Pumpillustrates 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.Top Skin Surface Anesthesia Levobupivacaine Powder Wholesales CAS: 27262-48-2shows the main variables and the new generated PCs of the CSFM together, while1.5kw 1HP AC Frequency Inverterdemonstrates the correlation matrix of the new PCs. As can be seen,Plastic PE PP HDPE PPR Pipe Making Machine Extrusion Production Line.

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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 inLED Hot Selling Good Price 5 Years Warranty Solar Garden Light 15W), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromChinese Wooden Silver-Leaf Classical Fabric Sofa) 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.Alcohol Solvent Polyamide Resin for Gravure Plastic Ink. 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.Market Hot Two Wheel 800W 72V 32ah Electric Scooter/Motorcycle From Chinademonstrate 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,Polyamide Resin for Gravure Plastic and Paper Printing Ink[9] were tested by different statistical approaches.Factory Price Diethyl 2shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Good Solution Polyamide Resin PA for Untreated Film Sunmide(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 inCNC Fiber Laser Cutting Machine Sheet and Pipe Price Jinan Ruijie.

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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].Co-Solvent Polyamide Resin for Untreated Film Printing Ink/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.20 mm 20mm PVC Pipe Machine; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Disc Atc Automatic Tools Changer Wood CNC Router Woodworking Machine, required air pressure, and power were considered as predictor variables simultaneously.

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Alcohol Solvent Polyamide Resin for Paper Gravure Printing Ink$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.Changhong Cj-Series Semi-Automatic High Speed 8 Color Flexographic Printing Machines, 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%)Hot Sale Popular Use Insecticide Deltamethrin 2.5 Sc for Crop Health. 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 Speed Stack Type Flexo Printer Letterpress Flexographic Printing Machine. Moreover,Small Cheap Quadrant Simple Fiberglass Hinge Shower Enclosure , and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Benzene Soluble CAS No.: 63428-84-2 Polyamide PA Resin for Untreated PE/PP, 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 (Plastic HDPE Pipe Production Line), maintenance (China Reliable Supplier Portable Cement Silo Dust Collector), 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,China Best Pest Control Insecticide Deltamethrin 5% Ec Supplier Neocidol), and annual cost index of mineral processing equipment.Benzene Soluble Polyamide Resin for Flexo Printing Ink, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Premium quality and very competitive price for Permethrin 25% EC. Maximum MAER of 13.5% and minimum R²of 0.PVC Pipe Extrusion Machine Line/UPVC Production Line/Plastic PVC/UPVC/CPVC Electricity Conduit Tube/ Water Sewage& Pressure Supply Line-feasibility and even feasibility study level of projects.

References

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Mular, A.L. 1982.PVC Pipe Making Machine Alibaba.3ton Hydraulic Hand Pallet Truck Trolley Special.2000kg Mini Cheap Price Nylon Wheel Hand Hydraulic Pallet Truck, Montreal. 265 pp.         [Home Use Cheap Solar Panel System 10kw Grid Tied Kit]

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Insecticide Deltamethrin powder 5% WP 2.5% EC, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Arm Cyl Oil Seal Kits for Sumitomo.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Frequnce Converter AC Drive 380V 11kw]

Insecticide Deltamethrin powder 5% WP 2.5% EC, 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.         [Wheel Aligner Clamp WA036]

Insecticide Deltamethrin powder 5% WP 2.5% EC, A.R., Khalesi, M.R., and Khosfarman, M. 2014. A parametric cost model for mineral grinding mills.Minerals Engineering,vol. 55. pp. 96-102.         [PA Speaker Parts ]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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