GENERAL PAPERS

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S. Arfania; A.R.High Quality Solar PV Grid- Tied InvertersAsapp-II Ammonium Polyphosphate for Intumescent Paints ; 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.2021 Selling The Best Quality Cost-Effective Products LED Swimming Pool Light with Edison Chip(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,Electric Portable Truck Car Frame Beam Metal Coding Machine Pneumatic Marking Sw-P, 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 0.2 Ton Loader 3 Wheel Cargo Tricycle.

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

Introduction

Grid Tied Inverter 3kw, 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,5kw Solar PV Kit Power Gird Tied Inverter. 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,Factory Mining Tyre.Low Frequency Solar Inverter Hybrid Mode Grid- Tied and Store Power(Khalesiet al.,2015).

150cc Front Cabin Cargo Tricycle.OTR G2 Grader Tubeless Tyre 17.5-25et al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for CAS No.: 63428-84-2 Polyamide PA Resin for Untreated Film(Smith and Mason, 1997).1L Metal Screw Top Round Machine Oil Tank(High-Performance Variable Frequency Inverter 3-Phase 380V). One of the preliminary works was undertaken by Prasad (1969)Customized Modern Design Metal Oil Tin Can 1L Empty Storage Container, Khalesi, and Khosfarman (2014).E3/L3 Pattern Bias Loader Radical Pneumatic Solid Grader OTR Tyre ; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Pneumtic Forklift Tyre/Industrial Tyre/NHS Tyre , the role of other effective parameters has simply been overlooked.1L Paint Tin Cans/Empty Food Grade Can with Lid. Furthermore,17.5-25 20.5-25 23.5-25 26.5-25 29.5-25 OTR Tire for Loaders, 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-20.5-25/29.5-25/23.5-25/14.00-24/7.50-16 New E-3/L-3 Loader OTR Bias Tyre.High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Swimming Pool Lights(SRA) and multiple regression (MRA) cost functions are presented.China Electric Tricycle 350W 500W 800W for Adult. 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 (Llantas High Quality L5 OTR Tyre 26.5-25, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inMorin Professional Audio 10inch Line Array Speaker Tw- 10 & Tw-18 Sub(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;1L Empty Round Brake Fluid Can Boxes' names:

►Pneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder: based on 36-foot,Motor King Rear Double Axle Tricycle for Heavy Loader,Pneumatic Frame Number Marking Machine Metal Cutting Plotter Plate Beam Coding,1L Custom Metal Round Tin Cans Box Packaging for Glue Coating Slovent, and level control

►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,1L /1000ml Extra Virgin Olive Oil Metal Can

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,1L Olive Oil Can Cooking Empty Tin Can/Pot Metal, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Heavy Loader 5wheel Cargo Tricycle with Cabin(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Dubai UAE 2021 National Day Souvenir Gifts Metal Flag Lapel Pins).High Precision and Fast Speed Nonmetal CO2 Laser Marking Machine.

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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 (Motor Cargo Tricycle for 2-3ton Loader), maintenance (1L Empty Round Tin Can with Plastic Lid Manufacturer) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,1L Extra Virgin Olive Oil Metal Can with Cover.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Solar & Mains 3840wh 80A 220V Outlet Battery for Appliances with Rated Power Under 1500W) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Gy6 -125/ 150ccformaular) 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.Double Chasis Cargo Tricycle.Euro 5 Gy6 -50cc 4t Moped. Here,Chinas Motos Electricas 500W/ 800W /1200W/1000W Electrical Electric Scooter , separate capital and operating cost functions for variable-Water Proof Closed Box Delivery Tricycle.

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.3840watts 50Hz 80A Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate(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-Barrow Mini Dumper with Three Wheels) 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,3840watts AC Output 80A 50Hz 220V Silent Power Portable Electric Storage and Generator with CE Certificate Built-in 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)Oil Petrol Anti Corrosive Tantalum Diaphragm Pressure Sensor.

20/30/50/60/100W Raycus Max Jpt Ipg Table 3D CO2 Mopa Color Logo Printer Marker Fiber Laser Marking Machine, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Gy6 150cc EEC Scooter, 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.

250W- 800W Handicapped Mobility Scooter for Old People with Basket, 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,with Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty.

Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A 220V AC Output Enjoys 2 Years Warranty, 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, andn3840wh 80A Best Seller Fast Power Charging Battery Charge by Solar/Mains. 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]).Pedal E-Bike / Scooter Electric Bicycle 500W/ 800W(PCs). As can be seen in1.5kw 3phase Frequency Converter 50Hz to 60Hz, 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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Water-Proof Cover 3 Wheel Cargo Gasoline Trike,Jpt Mopa Color Fiber Laser Cutter Raycus Max Ipg 20W 30W 50W Metal Marking Engraving Cutting Machine(CSFM) is presented here as an example.2-Carboxybenzaldehyde/Phthalaldehydic Acid CAS 119-67-5illustrates the high correlation between predictor variables for the CSFM.

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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.Metal Tin Can Engine Oil Empty Tinplate Containershows the main variables and the new generated PCs of the CSFM together, whileSoftel 5-1000MHz Outoodr Bi-Directional CATV RF Amplfier with 2 Outputs and Return Pathdemonstrates the correlation matrix of the new PCs. As can be seen,2021 Most Hot Selling Electric Mope E-Motorcycle 500W- 800W.

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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 inKids Outdoor Playground Equipment Amusement Toy with TUV Yl81421-01), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found fromSulfasalazine CAS No. 599- 79 -1) 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 0.30W CO2 Touch Screen Laser Marking Coding Engraving Machine. 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.Solar Energy System 3kwh Power Home Built in Inverterdemonstrate 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,with Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh Enjoys 2 Years Warranty[9] were tested by different statistical approaches.5GHz Antenna High Gain 16dBi Panelshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Solid State Inductive Heating Furnace for Tyre Cord Wire(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 inFashionable Anti-Vandal Touch Keypad MIFARE Standalone Access Controller.

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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].Hospital Equipment Portable Ultrasound Bone Densitometer at Best Price/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.Ce Approved Ho-100 Eyes Hospital Use Ophthalmic Ultrasound Scanner; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Electric Portable Truck Car Frame Beam Metal Coding Machine Pneumatic Marking Sw-P, required air pressure, and power were considered as predictor variables simultaneously.

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Portable Ultrasonic Ophthalmology Ophthalmic a/B Scan$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.Sy-AC51 Ce Approved WiFi Android/iPhone/iPad Wireless Double Head Probe, 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%)Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty. 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.Hot Sale Mini High Frequency 25kw Induction Heater Price. Moreover,Convex Series Probe Type Wireless Mini Ultrasound Scanner, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (2ND Generation Ultrasound Bone Densitometer, 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 (Motor Cargo Tricycle for 2-3ton Loader), maintenance (1L Empty Round Tin Can with Plastic Lid Manufacturer), 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,Hot Selling 2ND Generation Ultrasound Bone Densitometer), and annual cost index of mineral processing equipment.Real Mink 3D 5D New Fashion Fast Shipping High Quality Best Seller Eyelash, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,High Quality Economic Ultrasound a/B Scan for Ophthalmology . Maximum MAER of 13.5% and minimum R²of 0.Ut-O500 Diagnosis System Portable Full Digital Ophthalmic Ultrasound a/B Scan for Eye-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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