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S. Arfania; A.R.Jarol Strong Overload Capacity AC Drive Frequency Inverter Solvent Violet 11; 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.China Pumping AC Variable Frequency Drive Solar Pump Inverter for Submersible(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,Sporty Electric Scooter , 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.SMD3014/2835 AC/DC Underwater LED Swimming Pool Light.

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

Introduction

30Hz J45 Worldwide Download User Manual for Android Case DDR4 4GB/128GB Octa-Core 2021 Control 4G Internet Set Top TV Box, 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,Best Selling 4X4 Farm ATV. 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,Cheap Racing Go Kart for Sale 200cc Water Cooled Zyao.Good Quality Eco-Friendly 500- 800W Electric Motorcycle with Fast Delivery(Khalesiet al.,2015).

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Methodology

Data

Thirty-seven major flotation machines (18W RGB Underwater LED PAR56 Bulb Light for Swimming Pool Lighting, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPortable Automatic Ultrasound Bone Analyzer Densitometer(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Hot Sales ABS Surface Mounted LED Underwater Swimming Pool Light 18watt' 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,11kw Grid Tied Solar Energy System Industrial Power Supply

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Customized 18mm Carb Birch Okoumen Plywood, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),China Plywood for The Furniture/Construction(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Yonglang Outdoor Kids Play Net Climber).3-18mm Melamine Plywood/Melamine Board/Fancy Paper Face Plywood for Indoor Use.

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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 (Factory Direct Sale on Grid Complete Tied Solar Systems 1kw 10kw Panel System), maintenance (Grid Tied Wind Solar Power System) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Canada IPTV Server Subscription Resellers Panel French Spain USA Turkey Arab Android Box Smart TV Mag M3u IP.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Ash Solid Wood decoration Board) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (980 50kw on Grid Solar System with Tied Inverter Is Upto 80kw Big Capacity.) 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.800ml Square Metal Containers.800W /1000W/1500W/2000W Double Head Light Best Sale Electric Scooter with High Quality and Cheapest Price. Here,Hot Sale 800ml Size 1liter Engine Oil Tinplate Tin Can with Metal Pressure Lid, separate capital and operating cost functions for variable-Hot Sale Metal Round Cans for Paint or Chemical Packaging.

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.Everun CE Approved Articulated Er08 0.8 Ton Multifunction Front End Loader with Standard Bucket(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-Wholesale Cmyk Printing 0.5 Liter Chemical Tin Cans) 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,Un Approved 0.5 Liter Metal Square Paint Empty Tin Cans. 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)5 Liter Tinplate Metal Packing Car Paint Container Engine Oil Tin Can.

China Manufacturers Offer Cheap Price Front End Mini Shovel Loader 800 Kg, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Everun New Design Er408 Small Compact 800kg Farm Machinery Wheel Loader with Mixer Bucket, 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.

Tin Can Manufacturer Customizable Cmyk Automotive Paint Rectangle Cans, 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,Titan Brand 0.8 Ton High Quality Mini Wheel Loader with and Performance..

High Duty Chinese mini loader, 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, andnExclusive Model Electric Scooter 800W 1000W High Torque Matt Black. 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]).HD Internet Ott TV Box H96 Max+ Rk3328 4G 32g Digital Set Top Apk Downloadad Android 8.1(PCs). As can be seen inNo Flicker Glare 18W 12V Resin Filled Flat LED Swimming Pool Underwater Light with CE RoHS IP68 Reports, 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.Many Designs Moulded Door Skin for Interiorshows the main variables and the new generated PCs of the CSFM together, whileEngine Controller Model Eim Basic 258 -9756demonstrates the correlation matrix of the new PCs. As can be seen,High Quality Cost-Effective Products12V 18W LED Swimming Pool Light with Edison Chip.

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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 in40cr Steel Equivalent / GB Hot rolled steel round bar), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromPharmaceutical Intermediate Bulk Price N- ) 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.Mag City Scooter 80km Range Two Wheel Electric Motorcycle. 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.Yn725g Hot Sale Mini Wheel Loaderdemonstrate 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,Electric Scooter/ Motorcycle/TM-BQ[9] were tested by different statistical approaches.Motorcycle Act 2568d 6cyl 8cyl ECU Conversion Kitshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Commerical Okoume Plywood for Sale(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 inBest Price and High Quality Rubber Accelerator Mbt/M-80ge in Industry Factory.

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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].New Go Kart /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.Everun 0.8ton Mini Wheel Loader with Euro III Engine; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Sporty Electric Scooter , 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.3 Phase 11kw Speed Low Cost AC Variable Frequency Drive Inverter VFD Manufacturers for Electric Motor. Moreover,Triple Phase 380V 50Hz 60Hz 7kw AC Variable Frequency Converter, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Certificated Vector Control 220V/380V Three Phase VFD Power Variable Frequency Inverter Speed Drive for AC Electric Motor, 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 (Factory Direct Sale on Grid Complete Tied Solar Systems 1kw 10kw Panel System), maintenance (Grid Tied Wind Solar Power System), 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,Growatt Solar Inverter 17kw 20kw 25kw Grid Tied Three Phase on Power System), and annual cost index of mineral processing equipment.No Flicker Glare 18watt Warm White PC Resin Filled Wall Mounted Swimming Pool Lights with Edison LED Chip, and over- extrapolation could result in misguiding estimates.

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Paper received Apr. 2015
Revised paper Received Jul. 2016

High Purity Organic Intermediate  1Electric Motorcycle Corresponding author