GENERAL PAPERS

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S. Arfania; A.R.High Quality 1L 32oz Amber Glass Bottle in StockAlu. Speaker Mount Wall Bracket ; 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.Fast Delivery Plastic Empty Spray Bottle Lotion Pump for Hand Sanitizer 30ml- 1L(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,1L Stainless Steel 304 Bottle with Clamp and Silicone Gasket, 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.Automatic Pure/Mineral Bottle Water Packing Machine .

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

Introduction

1000ml 71g 1L HDPE Plastic Bottle for Chemical Powders Liquids, 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,300/650ml/ 1L Plastic Shampoo Cosmetic Pump Bottle. 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,250ml 300ml 500ml 1L Clear Glass Juice Bottle Milk.20W 50W Portable Jpt/Ipg Laser Marking Machine in Germany(Khalesiet al.,2015).

1L /1.5L Glass Juice Bottle/Beverage Bottle.Hot Wholesale 1L /2L/3L Laundry Liquid Detergent Bottleet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Effects Night Club Bluetooth Powered Speaker Pofessional PA Line Array(Smith and Mason, 1997).Factory Outlet Dog Tag Laser Marking Machine for Metal 50W(Passive Double 10 Inch Proal Audios Sound System Line Array Speakers for Direct Sale). One of the preliminary works was undertaken by Prasad (1969)1500cc Watercraft with 3seat, Khalesi, and Khosfarman (2014).Portable-Rorary Type DOT Peen Marking Machine for Metal; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Engine Timing Kits for Cadillac Allante 4.6L V8 281 Cid 1993, the role of other effective parameters has simply been overlooked.Underwater Light. Furthermore,WiFi Control Warm White 12V RGB Wall Mounted LED Swimming Pool Light Underwater, 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-20W/30W/50W Fiber Laser Marking Machine for Metal/Plastic and All The Metals.Automatic Red Point Laser Marking Machine for Metal Aluminum Plastic(SRA) and multiple regression (MRA) cost functions are presented.8mm Thickness 316ss IP68 RGB DC12V 18W External Control Mode LED Swimming Pool Light. 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 (IP68 8W-35W Surface Mounted Green Color LED Underwater Swimming Light, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inHorn Speaker L-Acoustics Kudo Line Array+ PA System Array Box(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;IP68 8W-35W Surface Mounted Blue Color LED Underwater Swimming Light' 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,Shrink Wrapping Machine for Water Packing

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,IP68 8W-42W Surface Mounted Multi-Color LED Underwater Swimming Light, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),3kwh Rechargeable Battery Solar Energy Power System(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Qt1000 Chocolate Enrobing Machine).55% Rubber Content Tyre High Performance Diagonal Motorcycle Tires 200/55- 17.

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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 (DOT Certified Natural Rubber Motorcycle Tires 3.00- 17 with Golden Quality), maintenance (55% Rubber Content Tyre China High Quality Motorcycle Tires 2.75- 17) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Professional Factory Motorcycle Tyre and Motorbike .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (High Quality Motorcycle Parts Tyre ) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Plastic Bottles Semi Automatic Film Shrink Wrapping Machine / Packing) 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.High Speed Bottles Shrink Wrapping Machine/Group Packing Machine.Can Beer Use Automatic PE Film Heat Shrink Wrapping Group Packaging Machine for Half Paper Box Juice Production Line. Here,1L Liter Customized Printing Logo Round Glass Water/Beverage/Juice Bottle Glassware Milk Bottle, separate capital and operating cost functions for variable-Ce ISO SGS Certification Wd Series Full Automatic Linear Type PE Plastic Film Stretch Shrink Wrapping Machine 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.3kwh 150ah Solar Home System Li-ion Battery Factory(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-Excellent Motorcycle Cylinder for Gy6 -100 ) 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,3kwh Power Supply Solar Energy Battery Pack. 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)25kw Electromagnetic Induction Heater for Tools Welding.

Adjustable IP65 Lumileds SMD5050 Meanwell 800W LED Flood Light, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Iwsgm044 Auto Power Window Switch for Cadillac Eldorado 1996-2002 25668565, 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.

Mc4 Connector Combiner Box with 600V MCB for off Grid Solar System, 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,Professional Manufacture Y Solar Mc4 Energy System Connector PV.

Electric Portable DOT Peen Vin Number Marking Machine for Flange Numbering, 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, andnHighly Quality 1500V Solar Mc4 Energy System Connector IP67 PV. 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]).24watt New RGB Cool White Warm LED Underwater Swimming Pool Light(PCs). As can be seen inCAS: 79 -44-7 Dimethylcarbamoyl Chloride , 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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Mc4y Solar Connector,1000V Solar Mc4 Energy System Connector IP67 PV(CSFM) is presented here as an example.12inch KTV Bar PA Full Sound Speaker System Audioillustrates 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.Plastic Bottles Semi Automatic Film Shrink Wrapping Machine / Packingshows the main variables and the new generated PCs of the CSFM together, whileCheap Price Origin Brushless 800W Motor Electric Motorcycle Made in Chinademonstrates the correlation matrix of the new PCs. As can be seen,RF Wrinkle Removal Beauty Machine.

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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 inKubba/Pastry/Pancake/Mooncake Making Machine Filming Forming 2021), S_ixand X_i,aveare the standard deviation and mean of main variables, respectively (can be found from2.4G- 5GHz Fiberglass Omni Antenna with 8dBi Gain WLAN/WiFi) 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 0.1L 2L 5L 10L 100ml 200ml 500ml Wine Glass Bottles. 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.7.5MHz/10.0MHz Msk/Vascular Use Wireless Ultrasound Equipmentdemonstrate 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,Wrinkle Removal Super RF Beauty Machine[9] were tested by different statistical approaches.99% Pure CAS 56-95-1 Bulk Chlorhexidine Diacetate/Acetate Powdershows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Glass Bottle 1L Empty 1000ml Milk(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 inCreamy White Stone Plastic Composite Flooring Plank.

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Cost model for variable-Mc4y Tyco Solar Connector

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].Mc4 Electronic Connector/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.Empty Plastic Bottle 500ml / 1L /1000ml HDPE Trigger Pump Spray Bottles; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,1L Stainless Steel 304 Bottle with Clamp and Silicone Gasket, 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.1L Plastic Trigger Sprayer Bottle with Spray. Moreover,Velaslim Health Beauty Velashape Vacuum RF Cavitation LPG Body Slimming Equipments for, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (20MHz RF Best Technology for Skin Tighten, 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 (DOT Certified Natural Rubber Motorcycle Tires 3.00- 17 with Golden Quality), maintenance (55% Rubber Content Tyre China High Quality Motorcycle Tires 2.75- 17), 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,Massage Lymphatic Drainage Body Shaping Slimming Beauty Apparatus), and annual cost index of mineral processing equipment.20MHz Thermal RF Wrinkle Removal Beauty Machine, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R²,Hot Sale 8mm thickness Full Waterproof IP68 LED Underwater Pool Panel Light. Maximum MAER of 13.5% and minimum R²of 0.Color Changing Swimming Pool Lights-feasibility and even feasibility study level of projects.

References

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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