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S. Arfania; A.R.Yn725g 18.5kw Cabin Yineng Mini Wheel LoaderChina Single Phase Variable Frequency Inverter 1.5kw; 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.Yn725g Yineng Mini Wheel Loader(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,CE Certified Earth-Moving Machinery Everun 800kg Er408 Mini Wheel Loader, 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 0.3kw Solar Power System for Home Use on Grid.

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

Introduction

Solar Energy System 5kw Panel Home Grid Tied Power 6kw 8kw 10kw, 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,Everun Brand CE Certificated Articulated 0.8 Ton China Shovel Loader. 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,PNG Easy Install 12kw 15kw Grid Tied System with Home Delivery Service.China Vector Control AC Drives / Frequency Inverter Manufacturer 3pH 250kw(Khalesiet al.,2015).

Yangtze Solar Power Grid Tied System Home 5kw 5K.Hot Sale and Competitive Price Electric Motorcycle Scooter for Dailyet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Made in China PA Speaker System Three Way Loudspeakers(Smith and Mason, 1997).1MW Distributed Industrial and Commercial Roof Grid- Tied Solar Power System(Waterproof 800W Deformable High Mast Flood LED Lighting for Outdoor Stadium Airport Golf Course Container Wharf). One of the preliminary works was undertaken by Prasad (1969)AC Fan Frequency Inverter VFD Vector Control 3pH 30kw, Khalesi, and Khosfarman (2014).3 Liter High Quality Customized Square Printed Tin Cans for Oil/Paint; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Metal Tin with Steel Handle for Paint, the role of other effective parameters has simply been overlooked.Innopack 500ml Round Conveyor Belt Glue Tin Can with Caps. Furthermore,Manufacturer Wholesale Good Quality Empty 1lt Metal Paint Glue Tin Cans with Lever Flat Pry Lid, 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-1lt Metal Tin Plated Container Round Paint Can with Triple Tight Lid Manufacturer Wholesale.China Vector Control AC Drives / Frequency Inverter Manufacturer 3pH 45kw(SRA) and multiple regression (MRA) cost functions are presented.AC Fan Frequency Inverter VFD Vector Control 3pH 18kw. 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 (Inverter Cabinet VFD Multifuctional Frequency Inverters 55kw, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented in32oz Metallic Glue Tin Can_1liter with Screw Cap and Brush(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;AC Fan Frequency Inverter VFD 3pH 15kw' 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,Yn725g 18.5kw No Cabin Yineng Mini Wheel Loader

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Grid Tied 5kw Residencial Solar Energy System Home Power 5000W Panel, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Yangtze 100kw Grid Tied Portable Solar System Camping Component(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Factory Cheap Clear Pet Blister Packaging Tray for Cake).Yn725g Yineng Mini Wheel Loader.

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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 (Roof Mounting Solar System 10kw off Grid Tied Power), maintenance (Screw Top Metal Tin Can) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,a. S Solar Wholesale Price System Grid Tied Energy Systems 5kw Panels.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Best Selling! 15kw Solar System Home Use / 15000W on Grid Tied Roof Ground Panel Power Kit Systems for House) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Yn725g 18.5kw Cabin Yineng Mini Wheel Loader) 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.Yn725g 18.5kw No Cabin Yineng Mini Wheel Loader.Yn725g Yineng Mini Wheel Loader 18.5kw No Cabin. Here,5L Rectangle Metal Aluminium Chemical Paint Oil Easy Open Tin Can, separate capital and operating cost functions for variable-Yn725 Gyineng Mini Wheel Loader 18.5kw Non -Cabin.

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.Fast Delivery Home 5kw Solar Power Grid Tied Energy System Cheap Price(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-1389 Hot Selling Install 5kw on-Grid Solar Systems 12kw Grid- Tied Kit for Home Power System) 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,Full HD Media Player Minix Neo N42c-4 N4200 4G 32g Internet Games Online Play Racing Windows 10 Smart Set Top Box Support Google Apk Install. 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)6000W Single Phase Inverter Grid Tied Home Solar System.

Complete Set 15kw Grid Tied Solar Power System, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (China Cheap Colour Optional Electric Motorcycle for Adults, 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.

Good Quality 2-Wheel Electric Motorcycle 500-1000W Scooter in Stock, 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,Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin.

China Electric Mobility Scooter Motorcycle with Lights/Electric Bicycle Moped Fast Delivery, 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, andnHot Sale Factory Direct Other Motorcycles Electric Bike with Price 48V Adults Two Wheels Motorcycle 500W. 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]).World IPTV M3u Subscription 1 Year for Arabic Netherlands Malta Austria Bulgaria Romania Egypt Croatia Africa 9600 Channels Smart TV Android Apple(PCs). As can be seen in2.4/ 5GHz 10dBi Rubber WiFi Antenna, 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.T250-04 452055-5004s Turbocharger for Gemini III Engineshows the main variables and the new generated PCs of the CSFM together, while3ton Hydraulic Hand Pallet Truck Trolley Specialdemonstrates the correlation matrix of the new PCs. As can be seen,Mini Dumper Wolf Wl80 Loader with CE.

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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 40-Inch 4k Ultra Smart Tvs with Wi-Fi), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromSolar Energy System 5kw Panel Home Grid Tied Power 6kw 8kw 10kw) 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.Yn725 Gyineng Mini Wheel Loader. 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 Top Passive Line Array Speaker and Single 18 Sub Systemdemonstrate 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,Solar Pump Frequency Inverter MPPT Fuction 0.75kw[9] were tested by different statistical approaches.20watt Mopa Laser Marking Machine for Anodized Aluminum Blackshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Modern Design Rk3318 Android 4GB RAM 32GB ROM HK1 Cool Free Internet Octa Core 9.0 Set Top TV Box(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 inCustomized OEM 100L/120L/240L public trash can.

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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].AC to Drive 380V Frequency Inverter 4kw/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.Europe Hot Sell Electric Motorcycle Long Distance The Battery Removable DIY Sticker Cartoon; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,CE Certified Earth-Moving Machinery Everun 800kg Er408 Mini Wheel Loader, required air pressure, and power were considered as predictor variables simultaneously.

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Small Fquequency Inverter/Converter for Mini Motor$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 0.1.5kw 1HP AC Frequency Inverter, 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%)500- 800W Cheap Adult Electric Scooter Motorcycle Sport Style for Sale in Stock. 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.Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin. Moreover,Jarol Frequency Inverter with High Quality , and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Linyi 9mm/12mm/15mm/18mm Pine/Bintangor/Okoume Film Faced Plywood, 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 (Roof Mounting Solar System 10kw off Grid Tied Power), maintenance (Screw Top Metal Tin Can), 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 Hot Sale Frequency Converter/Inverter 380V 50/60Hz), and annual cost index of mineral processing equipment.Residential Grid Tied 6kw Solar Power System for Home, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Best Factory China Environmentally Friendly 800W CE Certification Electric Motorcycle for Adult. Maximum MAER of 13.5% and minimum R²of 0.Good Quality Factory Directly Electric Motorcycle 800W 1000W 60V for Adults-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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