GENERAL PAPERS

Pharmaceutical Intermediate High Purity Peptides CAS 113- 79 -1 Argpressin Acetate ArgipressinCost modelling for flotation machines

S. Arfania; A.R.China Jwell PVC Dual/Four Pipe High Speed Extrusion Equipment C-PVC/U-PVC/PVC-O Making Machine2021 New Products Motor Power 800W Electric Trolley Tractor; 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.HD250-5/7 Arm Boom Bucket Cylinder Seal Cyl for Kato(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,Ergonomic Design AC 3000kg Trolley Hydraulic Hand Pallet Truck, 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.PVC Garden Pipe Making Machine Cost.

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

Introduction

CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film Sunmide, 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,PU Wheel 2000kg Hand Pallet Truck with Digital Weighing Scale. 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,Excellent Quality CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film Sunmide.PVC Pipe Making Machine Alibaba(Khalesiet al.,2015).

3ton Hydraulic Hand Pallet Truck Trolley Special.2000kg Mini Cheap Price Nylon Wheel Hand Hydraulic Pallet Trucket al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 10W Wall Mount Speaker with Transformer 8 Ohm 100V Bluetooth (Smith and Mason, 1997).Direct Sale Polyamide PA Resin for Ink(Luneng Yn725 Yineng Mini Wheel Loader 18.5kw Cabin). One of the preliminary works was undertaken by Prasad (1969)CAS No. 63428-84-2 High Gloss Co-Solvent Soluble Polyamide Resin PA for Printing Ink, Khalesi, and Khosfarman (2014).Plastic PVC|PE|PP|PPR|Agriculture Water|Gas|Irrigation Pipe|Faux Marble Sheet|Foam Board Floor|Roofing Tile|Extruder|Extrusion Making Machine Production Line; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Warehouse Transporting Equipment Hydraulic Nylon Wheel Hand Manual Pallet Truck, the role of other effective parameters has simply been overlooked.Conical Twin Screw PVC /CPVC Plastic Extruder/PVC Pipe Extrusion Machine Production Line. Furthermore,PVC Vacuum Calibrated Tank 160mm, 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-Material Handling Equipment Manual Hand Pallet Jack.Excellent Quality Hydraulic Arm Cyl Seal for E307D Excavator(SRA) and multiple regression (MRA) cost functions are presented.Factory Manufacture E307D Bucket Cyl Kit Seal. 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 (Excavator Cylinder Seal for E307b Boom Cyl Repair Parts, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPipe Bevelling Machine (InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Arm Cyl Oil Seal Kits for Sumitomo' 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,Deltamethrin 98% Tc Insecticide 2.5 Sc Wholesale 2021

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Top Quality Insecticide Classification Deltamethrin 98%TC, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Highly Effective Deltamethrin (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Cheap Malaysia Freestanding Acrylic Soaking Tubs of Immersion).Chrome Quadrant Shower Enclosure with Plastic Double Roller.

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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 (Frame Quadrant Glass Curved Shower Cubicle for Sale Price), maintenance (Quadrant Stainless Steel Corner Shower Enclosure for Hotel with Customized Size and Color) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Quadrant Framed Shower Enclosure/ Cabin / Cubicle .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Imiprothrin 93%TC) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Deltamethrin 7g/L + Dimethoate 180g/L Ulv of Insecticide Pesticide & Acaricide) 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.Deltamethrin 2.5% Wp of Insecticide Pesticide.Insecticide Deltamethrin 2.5% Ec. Here,PVC 16-32mm Four Pipes Extrusion Line, separate capital and operating cost functions for variable-High Speed UPVC/CPVC/PVC Water Sewage/ Pressure& Electricity Conduit Pipe Extrusion Machine.

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.Komatsu Boom Cyl Ket for PC300-5(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-PPR Pipe/HDPE Pipe/PVC Pipe /UPVC Machine Manufacturer Factory) 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,Komatsu Boom Cyl Ket for PC400-6. 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)Komatsu Bucket Cyl Ket for PC300-5.

Hyundai Excavator Hydraulic Cylinder Bucket Seal Kit for R210, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Ex200-1/2/3/4/5 Arm Cyl Oil Seal Kit for Hitachi, 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.

Factory Direct Sale Polyamide PA Resin for Ink and Adhesives, 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,Aftermarket Hdy. Cyl Repair Kits for Cat Diggers/0965606.

China Factory Supply Good Quality Polyamide Resin PA, 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 Quality CAS No. 63428-84-2 Alcohol Soluble Polyamide PA Resin for Packaging Ink. 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]).Used for Brushing PA610 with High Tensile Strength(PCs). As can be seen inReconstituted Composite Woven Veneer Braided, 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.China Factory Price Chlorhexidine Diacetate CAS 206986- 79 -0shows the main variables and the new generated PCs of the CSFM together, while4G Lte Cat7 Outdoor CPE 5GHz B46 5150-5925MHzdemonstrates the correlation matrix of the new PCs. As can be seen,High Quality Nylon Plated Classical Guitar Accessory Strings.

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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 inBaby care products Yoursun diaper sleeping style breathable baby), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromTop Sale Chinese CE Certification New Adult Racing Electric Motorcycle 350W) 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.Acoustic and Electric Guitar Hard Ware Machine Head Mh-3692. 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.PA Speaker Three-Way Large Touring Performance Line Array System PRO Audiodemonstrate 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,High Quality Classical Guitar Nylon Strings[9] were tested by different statistical approaches.2HP 1 Phase Frequency Convertershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.4 Stringed Wrapped Electric Bass Guitar Strings(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 inTop 10 Brush Styles 7PCS Lovely Pink Professional Makeup Set with Wooden Handle Material.

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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].Ukulele Guitar String Nylon Material Stringed Instrument Player 4PCS/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.Digital Tuner ; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Ergonomic Design AC 3000kg Trolley Hydraulic Hand Pallet Truck, required air pressure, and power were considered as predictor variables simultaneously.

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Digital Tuner for Guitar $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.Newest Hot Sell Guitar Machine Head Tuner, 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%)10W 4" Inchs LED Dimmable Downlight for Room. 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.Super Power LED Lighting 100W Flicker Free Ceiling Lamp. Moreover,Bluetooth Speaker WiFi RGB+WY LED Ceiling Lamp, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (60W LED High Power Bluetooth Speaker Ceiling Light, 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 (Frame Quadrant Glass Curved Shower Cubicle for Sale Price), maintenance (Quadrant Stainless Steel Corner Shower Enclosure for Hotel with Customized Size and Color), 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,WiFi RGB+WY Bluetooth Speaker LED Ceiling Lamp Light), and annual cost index of mineral processing equipment.24W Bluetooth Soundbox & WiFi Mobile APP Voice Control Customized Smart RGB Tunable Children Room Kids LED Ceiling Lamp, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Most Popular Cheapest Price Guitar Capo for Acoustic Guitar. Maximum MAER of 13.5% and minimum R²of 0.Guitar / Bass Tuner -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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