GENERAL PAPERS

VFD 0.75kw 220V 230V 1HP AC Motor Controller 50Hz 60Hz Frequency Inverter for Washing MachineCost modelling for flotation machines

S. Arfania; A.R.Inverter Cabinet VFD Frequency AC Drive 55kw8 Side Seal Rice Bag/Flat Bottom Pouch/Flat Plastic Bag for Pet Dog Cat Food Packaging; 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 18.5kw Cabin 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,Yn725g 18.5kw No Cabin Yineng 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.Grid Tied 5kw Residencial Solar Energy System Home Power 5000W Panel.

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

Introduction

Yangtze 100kw Grid Tied Portable Solar System Camping Component, 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,Yn725g Yineng Mini Wheel 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,Roof Mounting Solar System 10kw off Grid Tied Power.Screw Top Metal Tin Can(Khalesiet al.,2015).

a. S Solar Wholesale Price System Grid Tied Energy Systems 5kw Panels.Best Selling! 15kw Solar System Home Use / 15000W on Grid Tied Roof Ground Panel Power Kit Systems for Houseet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for 1500cc Watercraft with 3seat(Smith and Mason, 1997).Yn725g 18.5kw Cabin Yineng Mini Wheel Loader(Wholesale Factory 12V 200ah Lithium Ion LiFePO4 Battery 24V). One of the preliminary works was undertaken by Prasad (1969)Yn725g 18.5kw No Cabin Yineng Mini Wheel Loader, Khalesi, and Khosfarman (2014).Yn725g Yineng Mini Wheel Loader 18.5kw No Cabin; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,5L Rectangle Metal Aluminium Chemical Paint Oil Easy Open Tin Can, the role of other effective parameters has simply been overlooked.Yn725 Gyineng Mini Wheel Loader 18.5kw Non -Cabin. Furthermore,Fast Delivery Home 5kw Solar Power Grid Tied Energy System Cheap Price, 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-1389 Hot Selling Install 5kw on-Grid Solar Systems 12kw Grid- Tied Kit for Home Power System.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(SRA) and multiple regression (MRA) cost functions are presented.6000W Single Phase Inverter Grid Tied Home Solar System. 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 (Complete Set 15kw Grid Tied Solar Power System, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inGt1544sm Tdi Engine Bnm 045253019d 733783-5008s 733783-5007s Turbo(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;China Cheap Colour Optional Electric Motorcycle for Adults' 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,World IPTV M3u Subscription 1 Year for Arabic Netherlands Malta Austria Bulgaria Romania Egypt Croatia Africa 9600 Channels Smart TV Android Apple

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Factory Price Wholesale Vespa Electric Scooter Motorcycle Adult, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Cheaper Long Range off Road Best Selling Hot China Xindazhou Products Motorcycle Electric Adult(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Wholesale Newborn Baby Boys Rompers Onesie Spring and Autumn Cotton Long- Sleeved Clothing).2021 Fashion Electric Mtorcycle 2000W Motor China.

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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 (Mini Dumper Wolf Wl80 Loader with CE), maintenance (Engine Oil Cans 4 Liter Motor Lubricating Tin Can) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Yn725 Gyineng Mini Wheel Loader.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Solar Pump Frequency Inverter MPPT Fuction 0.75kw) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Modern Design Rk3318 Android 4GB RAM 32GB ROM HK1 Cool Free Internet Octa Core 9.0 Set Top TV Box) 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.Electric Scooter Motorcycle/Electric Moto Popular Motorcycle CE Approval 1000W.AC to Drive 380V Frequency Inverter 4kw. Here,Europe Hot Sell Electric Motorcycle Long Distance The Battery Removable DIY Sticker Cartoon, separate capital and operating cost functions for variable-2021 New Cheap Hot Sale Adults Small Electric 800W Motorcycle with Pedals.

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.China Hot Sale Single Phase Variable Frequency Inverter 1.5kw 220V(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-Small Fquequency Inverter/Converter for Mini Motor) 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,1.5kw 1HP AC Frequency Inverter. 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)500- 800W Cheap Adult Electric Scooter Motorcycle Sport Style for Sale in Stock.

Yn725 Yineng Mini Wheel Loader 18.5kw No Cabin, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Jarol Frequency Inverter with High Quality , 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.

Linyi 9mm/12mm/15mm/18mm Pine/Bintangor/Okoume Film Faced Plywood, 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,China Hot Sale Frequency Converter/Inverter 380V 50/60Hz.

Residential Grid Tied 6kw Solar Power System for Home, 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, andnBest Factory China Environmentally Friendly 800W CE Certification Electric Motorcycle for Adult. 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]).Good Quality Factory Directly Electric Motorcycle 800W 1000W 60V for Adults(PCs). As can be seen inCe Certification Plastic Water Bottle Use Yellow Masterbatch, 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.PA Speaker Cabinet Accessories shows the main variables and the new generated PCs of the CSFM together, while12" Professional Rcf Style Speaker Framedemonstrates the correlation matrix of the new PCs. As can be seen,Chinese Industrial Titan Small 0.8 Ton Articulated Earth Mover Euro Auto Mini Farm Truck Wheel Tractor Front End Loader for Sale.

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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 inNew Popular Project Stripe Organza Sheer Curtain Fabric 008226), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromPowder Caprolactam Grade Chemical Fertilizer with Nitrogen 21%) 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.Three Phase Frequency Inverter Made in China Hot Sale. 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.Professional Speker System 12 Inch PA Line Array Audio S1210demonstrate 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,0.8ton mini wheel loader with small bucket for multifunctional use[9] were tested by different statistical approaches.Q1 Dual 10 " Line Array Systemshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Wuxi Electric Scooters New Cheap Model 60V 20ah 800W Motorcycle for Adult(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 inPVC Luxury Vinyl Floor Covering for Domestic Usage.

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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].Solar Panel System 20kw Grid Tied Power for Home/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.5kw Solar-Diesel Generation Hybrid Grid- Tied Power System; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Yn725g 18.5kw No Cabin Yineng Mini Wheel Loader, required air pressure, and power were considered as predictor variables simultaneously.

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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.20kw Grid Tied Solar System. Moreover,Soft Starter Small Frequency Converter Mini Inverter AC Motor Speed Controller, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Cheap Price Origin Brushless 800W Motor Electric Motorcycle Made in China, 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 (Mini Dumper Wolf Wl80 Loader with CE), maintenance (Engine Oil Cans 4 Liter Motor Lubricating 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,Rk3329 Ubuntu Mini PC HK1 Max Xbmc Chrome Cast TV Internet Box Quad Core Firmware Android), and annual cost index of mineral processing equipment.220VDC to 220VAC Variable Frequency Inverter, and over- extrapolation could result in misguiding estimates.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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