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S. Arfania; A.R.CAS No.: 63428-84-2 Polyamide PA Resin for Untreated FilmMy-A010b-N Medical Ultrasound Instruments Convex Handheld Wireless Probe; 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.Dust Collector Woodworking Machinery Supplier(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,Jwell-PLA Biodegradable Sheet Recycling Cup Making Extrusion 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.Excellent Gel Resistance Ability Polyamide Resin.

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

Introduction

Jwell PP/PC Sheet Extrusion Equipment, 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,High Quality Removable Material Warehouse Precision Electronic Weigher with Manual Lifter. 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,High Toughness and Tensile Strength Resin 610.Toughness High Engineering Plastics 610 for Auto Parts(Khalesiet al.,2015).

Three Heads Woodworking Machine Atc CNC Router.High Quality Removable Material Warehouse Precision Electronic Weigher with Hand Manual Jacket al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Single 5inch Coaxial Full Range Professional Loudspeaker Inside Have Two-Way Home Cinema 60W with CF5190806(Smith and Mason, 1997).HDPE Water/Gas Supply Pipe Extrusion Line(High Performance Vector Control 1pH 220V VFD Variable Frequency Inverter Speed Drive for AC Electric Motor). One of the preliminary works was undertaken by Prasad (1969)Automatic Tool Changing CNC Router with 9kw Hsd Spindle. Wood Door Carving Atc, Khalesi, and Khosfarman (2014).Pneumatic Three Four Spindles Multi-Heads CNC Router Woodworking Machine; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Disc Atc Automatic Tools Changer Wood CNC Router Woodworking Machine, the role of other effective parameters has simply been overlooked.Tank Dust Removing Machine with Filter Cartridge. Furthermore,Quadrant Stainless Steel Shower Room with 8mm Tempered Glass, 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 Water/Gas Supply Pipe Extrusion Machinery.Factory Price 1325 Atc CNC Router Automatic Tool Change Machinery(SRA) and multiple regression (MRA) cost functions are presented.HDPE Water/Gas Supply Pipe Extrusion Equipment. 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 (45cm High Tray Toughened Glass Curved Quadrant Shower Cabin, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inWater Treatment Disodium Phosphate (InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Bathroom 8mm Glass Full Arc Quadrant Enclosed Shower Door' 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,China Direct Supply CAS No.: 63428-84-2 Polyamide Resin for Untreated Film

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Quadrant Framed Grey Glass Shower Enclosure Sliding Door Simple Room, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),HDPE PE PPR Pipe Making Machine(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (60kVA/50kw Japan Isuzu/Kubota/Denyo Diesel Engine Power Electric Set Genset Canopy /Enlcosur/Silence/Sound Silent Portable Generator Generadores).NBR Nitril 80 Duro Rubber X Ring /Quad.

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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 (EPDM 50 Duro As568 Rubber O Ring), maintenance (Cheap Price Nice Mini Seal Viton/FKM X Rings) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Rectangle Sliding Strip Glass Door Quadrant Bathroom .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Shurong Made Insecticide Deltamethrin 2.5% Ec CAS No. 52918-63-5) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Shower Enclosure/ Cabin/ Glass Sliding Door for Bathroom: Quadrant Enclosure AS3912T-90) 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.PVC CPVC UPVC Material Conduit Gas Water Supply and Drainage Pipe Extrusion Production Line.Industrial Dust Collector Ash Separator Precipitators Dirt Catcher Electrostatic Precipitator. Here,Wear-Resistant PU O Ring, separate capital and operating cost functions for variable-Automatic Plastic PVC UPVC Double Cable Pipe Tube Extrusion Production Line.

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.Acrylic Film Quadrant Frosted Glass Shower Cubicle with Low Tray (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-Plastic PVC CPVC UPVC Sewage/ Pressure Pipe& Electrical Conduit Cable Pipe/Tube /Single Corrguated Pipe ) 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,Plastic HDPE Pipe Production Line. 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)China Reliable Supplier Portable Cement Silo Dust Collector.

Dust Collector for Granite Welding, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Dust Collector Cages Surface Grinding 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.

Dust Collector Hammer Mill Shaker, 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,Gold Dust Collector Cement Filter Bag.

Low Water Absorption Polymer 610, 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, andnHigh Impact Strength and Low Water Absorption Resin 610. 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]).CAS No. 63428-84-2 Good Quality Co-Solvent Soluble Polyamide Resin for Printing Ink(PCs). As can be seen inCe Approved Ho-100 Eyes Hospital Use Ophthalmic Ultrasound Scanner, 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.Metal Fiber Ring Color Laser Engraving Machineshows the main variables and the new generated PCs of the CSFM together, while0.75kw Power Frequency Converter 60Hz 50Hzdemonstrates the correlation matrix of the new PCs. As can be seen,2t 2000kg 3t 3000kg 5t 5000kg Hydraulic Pump Nylon PU Wheel Hand Manual Pallet Carrier Forklift.

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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 inHigh Quality Custom Mushroom Shaped Rainbow Plated Hard Enamel Lapel Pin Badge Metal Glitter Humor Jeweled Iridescent), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromAll Terrain Vehicle Tyres ATV Wheel) 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.Insecticide Deltamethrin powder 5% WP 2.5% EC. 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.Dual 12 Inch Powered Line Array Active Sound System W-210bpdemonstrate 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,Pesticide Deltamethrin 98% TC[9] were tested by different statistical approaches.Poplar Film Faced Plywood Board with Carb Certificateshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.King Quenson Best Selling Deltamethrin 2.5% Wp Insecticide Manufacturer(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 inElectrical Testing Instrument Circuit Breaker Analyzer for on-Site Test of High Voltage Switch.

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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].Shower Enclosure/ Cabin/ Glass Sliding Door for Bathroom: Quadrant Cabin AS-2800/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.Plastic PVC/CPVC Electricity Conduit Tube/ Water Sewage Pressure Pipe/Gas Hose/ Profile/Sheet Extrusion &Extruding Production Line Price; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Jwell-PLA Biodegradable Sheet Recycling Cup Making Extrusion Machine, required air pressure, and power were considered as predictor variables simultaneously.

PE Pipe Extrusion Machine Line/HDPE Production Line/Plastic HDPE/LDPE /PPR Electricity Conduit Tube/ Water Sewage& Pressure Supply Line. Moreover, the operating cost was detailed in different cost items.Water/Gas-Supply PP PE HDPE Plastic Pipe/Tube Extrusion Making Machine, indicated inHot Selling High Quality CAS. 56-95-1 Chlorhexidine Acetate, and major extrapolation should be avoided.

Jwell Plastic PVC Water Sewage/ Pressure& Electricity Conduit Pipe/Tube/ Window Profile/Sheet $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.Plastic PE PP HDPE PPR Pipe Making Machine Extrusion Production Line, 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%)Water and Gas Supply HDPE Pipe Extrusion Production Line 315mm. 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.Alcohol Solvent Polyamide Resin for Gravure Plastic Ink. Moreover,Polyamide Resin for Gravure Plastic and Paper Printing Ink, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Good Solution Polyamide Resin PA for Untreated Film Sunmide, 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 (EPDM 50 Duro As568 Rubber O Ring), maintenance (Cheap Price Nice Mini Seal Viton/FKM X Rings), 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,Easy Operating Manual Hand Pallet Truck Forklift Scale), and annual cost index of mineral processing equipment.Co-Solvent Polyamide Resin for Untreated Film Printing Ink, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,20 mm 20mm PVC Pipe Machine. Maximum MAER of 13.5% and minimum R²of 0.CAS No.: 63428-84-2 Polyamide Resin-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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