GENERAL PAPERS

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S. Arfania; A.R.Water/Gas-Supply PP PE HDPE Plastic Pipe/Tube Extrusion Making MachineFree Sample Bulk Stock Procaine South America Warehouse CAS: 51-05-8; 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.Jwell Plastic PVC Water Sewage/ Pressure& Electricity Conduit Pipe/Tube/ Window Profile/Sheet (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,Plastic PE PP HDPE PPR Pipe Making Machine Extrusion Production Line, 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.Water and Gas Supply HDPE Pipe Extrusion Production Line 315mm.

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

Introduction

Alcohol Solvent Polyamide Resin for Gravure Plastic Ink, 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,Polyamide Resin for Gravure Plastic and Paper Printing Ink. 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,Good Solution Polyamide Resin PA for Untreated Film Sunmide.Easy Operating Manual Hand Pallet Truck Forklift Scale(Khalesiet al.,2015).

Co-Solvent Polyamide Resin for Untreated Film Printing Ink.20 mm 20mm PVC Pipe Machineet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Benzocaine CAS 94-09-7 Tetracaine HCl Lidocaine Sell 136-47-0(Smith and Mason, 1997).CAS No.: 63428-84-2 Polyamide Resin(CAS No.: 67-63-0 Top Quality Dehydrating Agent Ipa 99.9%/ Isopropyl Alcohol Isopropanol 99.9%). One of the preliminary works was undertaken by Prasad (1969)Polyamide PA Resin CAS No.: 63428-84-2 for Untreated Film Sunmide, Khalesi, and Khosfarman (2014).Alcohol Solvent Polyamide Resin for Paper Gravure Printing Ink; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Changhong Cj-Series Semi-Automatic High Speed 8 Color Flexographic Printing Machines, the role of other effective parameters has simply been overlooked.Hot Sale Popular Use Insecticide Deltamethrin 2.5 Sc for Crop Health. Furthermore,High Speed Stack Type Flexo Printer Letterpress Flexographic Printing Machine, 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-Small Cheap Quadrant Simple Fiberglass Hinge Shower Enclosure .Benzene Soluble CAS No.: 63428-84-2 Polyamide PA Resin for Untreated PE/PP(SRA) and multiple regression (MRA) cost functions are presented.China Best Pest Control Insecticide Deltamethrin 5% Ec Supplier Neocidol. 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 (Benzene Soluble Polyamide Resin for Flexo Printing Ink, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inHome Use Cheap Solar Panel System 10kw Grid Tied Kit(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Premium quality and very competitive price for Permethrin 25% EC' 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,HD250-5/7 Arm Boom Bucket Cylinder Seal Cyl for Kato

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Ergonomic Design AC 3000kg Trolley Hydraulic Hand Pallet Truck, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),PVC Garden Pipe Making Machine Cost(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Factory Wholesale 3D Logo Silicone Printed Elastic Webbing).CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film Sunmide.

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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 (PU Wheel 2000kg Hand Pallet Truck with Digital Weighing Scale), maintenance (Excellent Quality CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film Sunmide) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,PVC Pipe Making Machine Alibaba.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (3ton Hydraulic Hand Pallet Truck Trolley Special) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (2000kg Mini Cheap Price Nylon Wheel Hand Hydraulic Pallet Truck) 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.Direct Sale Polyamide PA Resin for Ink.CAS No. 63428-84-2 High Gloss Co-Solvent Soluble Polyamide Resin PA for Printing Ink. Here,Plastic PVC|PE|PP|PPR|Agriculture Water|Gas|Irrigation Pipe|Faux Marble Sheet|Foam Board Floor|Roofing Tile|Extruder|Extrusion Making Machine Production Line, separate capital and operating cost functions for variable-Warehouse Transporting Equipment Hydraulic Nylon Wheel Hand Manual Pallet Truck.

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.Conical Twin Screw PVC /CPVC Plastic Extruder/PVC Pipe Extrusion Machine 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-PVC Vacuum Calibrated Tank 160mm) 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,Material Handling Equipment Manual Hand Pallet Jack. 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)Excellent Quality Hydraulic Arm Cyl Seal for E307D Excavator.

Factory Manufacture E307D Bucket Cyl Kit Seal, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Excavator Cylinder Seal for E307b Boom Cyl Repair Parts, 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.

Arm Cyl Oil Seal Kits for Sumitomo, 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,Komatsu PC270-7 Arm Cyl Ket.

Deltamethrin 2.5% EC Pesticide & Insecticides, 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, andnManufacture! OEM Komatsu PC50uu-2 Bucket Cyl Seal Ket. 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]).16 Years Agrochemical Manufacturer Pest Control Deltamethrin Low Price(PCs). As can be seen inBuy Real Local Anesthetic Pure Powderr Niche Larocaine Free Shipping Europe CAS: 94-15-5, 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.Factory Price Home Solar Energy System 3kwh with 5 Years Warrantyshows the main variables and the new generated PCs of the CSFM together, whileLebekan 300W 400W 500W 600W 800W Outdoor Light Building Landscape Lighting Wall Washer Floodlightdemonstrates the correlation matrix of the new PCs. As can be seen,Chrome Quadrant Shower Enclosure with Plastic Double Roller.

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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 inDistinctive China Factory Business Boarding Wheel Trolley Suitcases Luggage), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromPharmaceutical Intermediate High Purity Peptides CAS 113- 79 -1 Argpressin Acetate Argipressin) 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.Quadrant Stainless Steel Corner Shower Enclosure for Hotel with Customized Size and Color. 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.Luneng Yn725 Yineng Mini Wheel Loader 18.5kw Cabindemonstrate 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,Quadrant Framed Shower Enclosure/ Cabin / Cubicle [9] were tested by different statistical approaches.Pipe Bevelling Machine shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Imiprothrin 93%TC(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 in12V 2A Power Adapter STB Monitoring Supply.

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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].Deltamethrin 2.5% Wp of Insecticide Pesticide/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.Insecticide Deltamethrin 2.5% Ec; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Plastic PE PP HDPE PPR Pipe Making Machine Extrusion Production Line, required air pressure, and power were considered as predictor variables simultaneously.

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Komatsu Boom Cyl Ket for PC300-5$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.PPR Pipe/HDPE Pipe/PVC Pipe /UPVC Machine Manufacturer Factory, 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%)Komatsu Boom Cyl Ket for PC400-6. 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.Komatsu Bucket Cyl Ket for PC300-5. Moreover,Hyundai Excavator Hydraulic Cylinder Bucket Seal Kit for R210, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Ex200-1/2/3/4/5 Arm Cyl Oil Seal Kit for Hitachi, 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 (PU Wheel 2000kg Hand Pallet Truck with Digital Weighing Scale), maintenance (Excellent Quality CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film Sunmide), 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,Factory Direct Sale Polyamide PA Resin for Ink and Adhesives), and annual cost index of mineral processing equipment.Aftermarket Hdy. Cyl Repair Kits for Cat Diggers/0965606, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,China Factory Supply Good Quality Polyamide Resin PA. Maximum MAER of 13.5% and minimum R²of 0.High Quality CAS No. 63428-84-2 Alcohol Soluble Polyamide PA Resin for Packaging Ink-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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