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10oz Double Wall Stainless Steel Thermos Beer Mug
On-line version ISSN2411-9717
Print version ISSN2225-6253
J. S. Afr. Inst. Min. Metall. vol.117 n.1 Johannesburg Jan. 2017
http://dx.doi.org/10.17159/2411-9717/2017/v117n1a13Â
GENERAL PAPERS
Plastic Material PP Antistatic White Masterbatches with Anti Static Requirement Customized PP/PS/ABS/PE/LDPE/HDPECost modelling for flotation machines
S. Arfania; A.R.150cc Quad 4WD ATV for Adults6-Cylinder Diesel Engine Water Coolant for Electric Generator Set; 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.Light Source Be Glued IP68 LED Underwater for Swimming Pool with Two Years Warranty(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,IP68 Waterproof High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Underwater Pool Light with Edison Chip, 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 0.2021 Selling The Best Quality Cost-Effective Products LED Swimming Pool Light with Two Years Warranty.
Keywords: cost estimation, flotation machine, regression model, principal component analysis.
Introduction
5kw Grid Tied Solar Inverter Three Phase for Home Use, 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,High Quality Solar PV Grid- Tied Inverters. 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,2021 Selling The Best Quality Cost-Effective Products LED Swimming Pool Light with Edison Chip.Electric Portable Truck Car Frame Beam Metal Coding Machine Pneumatic Marking Sw-P(Khalesiet al.,2015).
2 Ton Loader 3 Wheel Cargo Tricycle.Grid Tied Inverter 3kwet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Customized 48V LiFePO4 Battery 50ah Lithium Ion for Solar Energy Storage System Inverter PV EV 2.5kwh 3kwh 5kwh(Smith and Mason, 1997).5kw Solar PV Kit Power Gird Tied Inverter(Recording Studio Equipment Vera Series Super Power Speaker Box). One of the preliminary works was undertaken by Prasad (1969)Factory Mining Tyre, Khalesi, and Khosfarman (2014).Low Frequency Solar Inverter Hybrid Mode Grid- Tied and Store Power; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,150cc Front Cabin Cargo Tricycle, the role of other effective parameters has simply been overlooked.OTR G2 Grader Tubeless Tyre 17.5-25. Furthermore,1L Metal Screw Top Round Machine Oil Tank, 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-Customized Modern Design Metal Oil Tin Can 1L Empty Storage Container.E3/L3 Pattern Bias Loader Radical Pneumatic Solid Grader OTR Tyre (SRA) and multiple regression (MRA) cost functions are presented.Pneumtic Forklift Tyre/Industrial Tyre/NHS Tyre . 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 (1L Paint Tin Cans/Empty Food Grade Can with Lid, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inWilson Parts Eim Module Engine Interface 258 -9753 2589755 Control(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;17.5-25 20.5-25 23.5-25 26.5-25 29.5-25 OTR Tire for Loaders' 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,1L Empty Round Brake Fluid Can Boxes
►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Pneumatic Electric Portable Truck Car Frame Beam Metal Coding Machine Marking Coder, blowers, and launders.
The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Motor King Rear Double Axle Tricycle for Heavy Loader(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Android Television 43 Inch LED TV).Pneumatic Frame Number Marking Machine Metal Cutting Plotter Plate Beam Coding.
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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 (1L Custom Metal Round Tin Cans Box Packaging for Glue Coating Slovent), maintenance (1L /1000ml Extra Virgin Olive Oil Metal Can) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,1L Olive Oil Can Cooking Empty Tin Can/Pot Metal.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.
The overhaul costs (Heavy Loader 5wheel Cargo Tricycle with Cabin) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (High Precision and Fast Speed Nonmetal CO2 Laser Marking Machine) 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.Motor Cargo Tricycle for 2-3ton Loader.1L Empty Round Tin Can with Plastic Lid Manufacturer. Here,1L Extra Virgin Olive Oil Metal Can with Cover, separate capital and operating cost functions for variable-Solar & Mains 3840wh 80A 220V Outlet Battery for Appliances with Rated Power Under 1500W.
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.Gy6 -125/ 150ccformaular(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-Double Chasis Cargo Tricycle) 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,Euro 5 Gy6 -50cc 4t Moped. 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)Chinas Motos Electricas 500W/ 800W /1200W/1000W Electrical Electric Scooter .
Water Proof Closed Box Delivery Tricycle, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (3840watts 50Hz 80A Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate, Khalesi, and Khosfarman, 2014).
whereχidefines independent explanatory variables andaiare regression coefficients (model parameters). As was mentioned, independency ofxivariables 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.
Barrow Mini Dumper with Three Wheels, 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]:
whereXobsis the observed value,xethe estimated value at time/placeI,and n,3840watts AC Output 80A 50Hz 220V Silent Power Portable Electric Storage and Generator with CE Certificate Built-in Inverter.
Oil Petrol Anti Corrosive Tantalum Diaphragm Pressure Sensor, 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).
whereCeis the estimated cost,Cathe actual cost, andn20/30/50/60/100W Raycus Max Jpt Ipg Table 3D CO2 Mopa Color Logo Printer Marker Fiber Laser Marking Machine. 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]).Gy6 150cc EEC Scooter(PCs). As can be seen inDiesel Engine Parts Fuel Injection Nozzle Bdll150s6571, 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 andXias Equations [5] and [6]:
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In this research, main variables ofX1, X2... Xnwere 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.10inch Speaker for Music Bar PRO Audio Sound Systemshows the main variables and the new generated PCs of the CSFM together, whileAll-Weather Compact 2-Way Coaxial Loudspeaker with 15" Lfdemonstrates the correlation matrix of the new PCs. As can be seen,3840wh 80A Best Seller Fast Power Charging Battery Charge by Solar/Mains.
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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)
whereXiare main technical variables (like power or required air),aiare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inDay and Night OEM Service Anion Sanitary Napkin), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromSteel Speaker Cabinet Top Hat with M20 Thread Inside ) 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.Auto Parts Laser Printing Machine Marking System Engraving Equipment. 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.MPPT Function Variable Frequency Drive Motor Controller Power Supply Generatordemonstrate 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,Water-Proof Cover 3 Wheel Cargo Gasoline Trike[9] were tested by different statistical approaches.Hot Sale 1000W 2 Wheel Stand Electric Scooter Motor/Electric Adult Motorcycleshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Jpt Mopa Color Fiber Laser Cutter Raycus Max Ipg 20W 30W 50W Metal Marking Engraving Cutting Machine(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 inLog Peeling Machine to Make Round Wood Milling.
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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].Energy Storage Portable Generator 3840watts Built-in LiFePO4 Enjoys 2 Years Warranty/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.30W CO2 Touch Screen Laser Marking Coding Engraving Machine; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,IP68 Waterproof High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Underwater Pool Light with Edison Chip, required air pressure, and power were considered as predictor variables simultaneously.
with Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh Enjoys 2 Years Warranty. Moreover, the operating cost was detailed in different cost items.Solid State Inductive Heating Furnace for Tyre Cord Wire, indicated inKomatsu PC270-7 Arm Cyl Ket, and major extrapolation should be avoided.
Factory Supply Biomass Rice Husk Charcoal Making Machine$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.Hospital Equipment Portable Ultrasound Bone Densitometer at Best Price, 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%)Ce Approved Ho-100 Eyes Hospital Use Ophthalmic Ultrasound Scanner. 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.Outdoor/Home Use Built-in LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty. Moreover,Low Failure Rate High Efficiency Induction Metal Heating Machine , and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Portable Ultrasonic Ophthalmology Ophthalmic a/B Scan, 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 (1L Custom Metal Round Tin Cans Box Packaging for Glue Coating Slovent), maintenance (1L /1000ml Extra Virgin Olive Oil Metal 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,Sy-AC51 Ce Approved WiFi Android/iPhone/iPad Wireless Double Head Probe), and annual cost index of mineral processing equipment.Camping Power / RV LiFePO4 Energy Storage Portable Generator 3.8kwh 80A Enjoys 2 Years Warranty, and over- extrapolation could result in misguiding estimates.
The MAER, RMSE, R2,Hot Sale Mini High Frequency 25kw Induction Heater Price. Maximum MAER of 13.5% and minimum R2of 0.Convex Series Probe Type Wireless Mini Ultrasound Scanner-feasibility and even feasibility study level of projects.
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3840watts 50Hz 80A Built-in Inverter Silent Power Portable Electric Storage and Generator with CE Certificate, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Melamine MDF E1 E0 Carb P2 Grade.Tunnelling and Underground Space Technology,vol. 27. pp.133-141. [High Quality Solar PV Grid- Tied Inverters]
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Paper received Apr. 2015
Revised paper Received Jul. 2016
Pharmaceutical Raw Materials 1 2-Dimethyl-5-Nitroimidazole Dimetridazole CAS 551-92-8New Design Indoor Corner Massage Jetted Whirlpool Bath Tub Acrylic Bathtubs for 2 Adults with Pillow and TVCorresponding author