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## Silicone Clear Cold Shrink Tube

*On-lineÂ version*Â ISSN2411-9717

*PrintÂ version*Â ISSN2225-6253

### J. S. Afr. Inst. Min. Metall.Â vol.117Â n.1Â JohannesburgÂ Jan.Â 2017

#### http://dx.doi.org/10.17159/2411-9717/2017/v117n1a13Â

**GENERAL PAPERS**

**20W/30W/50W Fiber Laser Marking Machine for Metal/Plastic and All The MetalsCost modelling for flotation machines**

**S. Arfania; A.R.2021 Best Selling Dual Battery Pedal Assisted Electric Scooter Bicycle****Automatic High Effective Ultrasound Bone Densitometer Made in China; 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.No Flicker Glare 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool 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,Hot Selling X96 Mini Amlogic S905W 1GB 8GB TV Box Android 7.0 4K Full HD Quad Core Smart for Internet, 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 R^{2}, 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 R^{2}of 0.Vintage Chinese Factory Customizable Classical Retro Style Cruiser Ebike Moped.

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

**Introduction**

Gogo Electric Moped Scooter Opg-Em022 Motor Power 800W 60V20ah Chaowei Tianneng Battery, 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,20'' 36V 500W Folding Electric Bike 35km/H with 12ah Lithium Battery. 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,Electricity Power Saver for Industry .Hidden Lithium Power City Bike Mountain Electric Bicycle 250/350/500/ 800W Ebike(Khalesi*et al.,*2015).

Malaysia Laser Marking Machines for Jewellery.Enclosed Covered Tricycle with Wagon*et al.*(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Speaker PS10(Smith and Mason, 1997).Color Marking 20W Fiber Laser Machine Price for Metal(Cold&Heat Seal Plastic Film Roll Chocolate Bar Food Cookies Packaging Bag Frosted Zipper Container Made Craft Drawstring Low MOQ Printing). One of the preliminary works was undertaken by Prasad (1969)Covered Tricycle Passenger Enclosed Cabin 3 Wheel Motorcycle, Khalesi, and Khosfarman (2014).Engine 150cc China 3 Wheel Motor Tricycle Chinese Commercial; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,High Quality Cheap Classic Light Mini Reverse Three Wheel Motorcycle , the role of other effective parameters has simply been overlooked.Mountain Using Motorcycle with Strong Steel Tube Frame. Furthermore,10W 20W 30W portable Fiber Laser Marking Machine, 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-CATV 860MHz One Way Amplifier.CATV Optical Receiver Module Bgo887bo Excellent Flatness 40 to 860 MHz(SRA) and multiple regression (MRA) cost functions are presented.CATV Amplifier Module Bgy887 24V 22.6db Excellent Return Loss Properties. 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 (High Efficiency SIM Card Fiber Laser Marking Machine, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inJwell-PVC Plastic Foaming|Semi-Skinning Board Recycling Agricultural Making Extrusion|Co-Extrusion Machine for Furniture Decoration Factory Direct Buy(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;2021 New Machine Grade CO2 Laser Marking with a Discount' names:

►20W Fiber Laser Color Marking Machine for Colorful on Stainless Steel: based on 36-foot,Mopa Fiber Laser Marking Machine for Black Printing,20W Table Fiber Laser Marking Machine for Metal Stainless Steel,Portable Handheld Metal Plastic DOT Peen Marking Machine, 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,5150-5850MHz Sector Panel Antenna with Gain 13dBi

►Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Dirt Bike for Sport Using with Large Power Engine, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (*D*), required air flow rate (AF),Electricity Saver Device (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (Tiger Zodiac Ice Sticker).3 Phase 50 - 60Hz Intelligent Power Saver.

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 (High Efficient Industrial Electric Motor Power Saver), maintenance (EEC 125/300cc Euro 5V Max Scooter-Alex One) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,Electricity Power Reducer .076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Nylon OTR Bias Tyre/Tire Manufacture E3/L3 15.5-25 17.5-25 20.5-25) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Electrical Saver 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.Sector Panel Antenna .15.5-25 17.5-25 20.5-25 23.5-25 OTR Tire. Here,Growatt 2kw on Grid Inverter 2000W Tied for Solar Power System Home, separate capital and operating cost functions for variable-Motorbike for 320cc with Police Cruiser Using Dry Weight 180kg.

*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.Heavy Duty Truck Tire 17.5-25 20.5-25 23.5-25(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-Three Wheel Motor Tricycle Rickshaw Rear Axle) 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,Gas Powered Adult Tricycle Motor Farm. 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:

where*Y*refers to capital or operating costs,*X*defines an independent variable (one of the machine predictor variables), and*a*and*b*are constant values (parameters)Motorcar for Both Civilc and Police Using with 320cc Displacement.

Police Using of Motorcycle for Cruiser with Displacement 320cc, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (High Quality Cylindrical Li-ion 12V 40ah 80ah Rechargeable Lithium Battery Pack for Portable Device, Khalesi, and Khosfarman, 2014).

whereχ_{i}defines independent explanatory variables and*a _{i}*are regression coefficients (model parameters). As was mentioned, independency of

*x*variables 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.

_{i}7kwh Multi-Function Solar Energy Lithium Battery Ion for Home, R^{2}, RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R^{2}is 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]:

where*X _{obs}*is the observed value,

*x*the estimated value at time/place

_{e}*I,*and n,5.8GHz WLAN/WiFi 0.9m Dual-Polarized Parabolic Antenna 32dBi Gain.

45cm Offset Satellite TV Antenna with 200 Hour UV Test, analysis of residuals, tests of MAER values and evaluation of R^{2}were 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).

where*C _{e}*is the estimated cost,

*C*the actual cost, and

_{a}*n*5.8g Omni Antenna/Dual Frequency Antenna 2.4G 5.8g/2400-2500MHz Omi. 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]).45cm Offset Satellite Dish TV Antennas(PCs). As can be seen in1L and 5L Can for Antifreezing Liquid, neither*X _{1}*nor

*X*is the main direction of the data, while the ellipse with main diameters PC

_{2}_{1}and PC

_{2}matches 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 and

*X*as Equations [5] and [6]:

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In this research, main variables of*X _{1}, X_{2}*.

*.. X*were 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.

_{n}*150ah Lithium Iron Phosphate *

2.4-2.5GHz/5-5.8GHz Dual Frequency WiFi Antenna Internet for Things,E3/L3 17.5-25 20.5-25 1800-25 Durable Tyres for Scrapers(CSFM) is presented here as an example.98% Uvarigranol B\C\D\E Standard Reference Materials Plant Extractsillustrates 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.Motorcycle Spare Part Oil Switch for Gy6 150shows the main variables and the new generated PCs of the CSFM together, whileQuadrant Framed Grey Glass Shower Enclosure Sliding Door Simple Roomdemonstrates the correlation matrix of the new PCs. As can be seen,C Band Satellite TV Antenna 150cm.

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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)

where*X _{i}*are main technical variables (like power or required air),

*a*are calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inVT Manual Chain Hoist Pulling Block 0.5t-30t), S

_{i}_{ix}and X

_{i,ave}are the standard deviation and mean of main variables, respectively (can be found fromFactory Supply Disodium Phosphate Anhydrous Food Additive) 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.Dsola ODM/OEM Design High Efficient Mc4 Connector 3 in 1. The R^{2}is about 0.94 for both cases,*i.e.*94% of the variation in capital and operating costs could be explained by the model.ADSS Body Slimming Beauty Machine demonstrate 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,Portable OEM Rechargeable 12V 40ah 80ah Lithium Ion Battery with MPPT and Inverter[9] were tested by different statistical approaches.Acoustic and Electric Guitar Hard Ware Machine Head Mh-3692shows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Mc4t-Branch Connector for Parallel Solar Panel Pair Male and Female(a1, a_{2}, a_{3}) and new intercept (a_{0}) 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 inStainless steel health beer sampling valve.

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*Cost model for variable-4000W/5000W off Grid Tied Solar Power System*

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].Internet TV Box Linux IPTV Zgemma I55/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.L-Guard Wheel Loader L-5 OTR 45/65-45 Cheap Wholesale Tyres; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Hot Selling X96 Mini Amlogic S905W 1GB 8GB TV Box Android 7.0 4K Full HD Quad Core Smart for Internet, required air pressure, and power were considered as predictor variables simultaneously.

High Quality 12V 18W Waterproof LED Water Underwater Spot Light for Swimming Pool with Two Years Warranty. Moreover, the operating cost was detailed in different cost items.24V 40ah Lithium Iron Battery for Electric Bike, indicated inVariable Frequency Converter Type Input 3 pH Drive Price Power Inverter Fan Motor, and major extrapolation should be avoided.

Dsola Chinese Supplier Multipurpose Mc4 Y Branch Connector$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.Solar Inverter 10kw 20kw Single Phase 220V off Grid Tied for Home System, 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 R^{2}values 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%)Dsola Customized High Heat Resistance 2 Pins Mc4 Solar Connector. 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.Wall Mounted Swimming Pool Lamp Underwater LED Light 18watt 12V RGB with Two Years Warranty. Moreover,2074 Growatt Inverter 9kw on Grid 9000W Tied Solar Power System Home, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Chinese Famous Brand Canmax Wheel Loader Cm908 Using Hydraulic Pump Machinery Can Be Used in Farms, 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 (High Efficient Industrial Electric Motor Power Saver), maintenance (EEC 125/300cc Euro 5V Max Scooter-Alex One), 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,Waterproof IP65 Microinverter 1200W 120-230VAC Single Phase Grid Tied Solar Panel Use), and annual cost index of mineral processing equipment.Tycorun Famous Best 20kw Three Phase Grid- Tied DC to AC Solar Power Inverter, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R^{2},Solis 10kw Grid Tied Inverter Solis-10K-4G-LV Three Phases. Maximum MAER of 13.5% and minimum R^{2}of 0.New Pattern Design 17.5-25 20.5-25 26.5-25 off Road Tyre-feasibility and even feasibility study level of projects.

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Kim, G.H., An, S.H., and Kang, K.I. 2004.12V/24V/48V/60V/72V/96V LiFePO4 Battery 40ah/50ah/60ah/100ah/200ah Lithium Ion, neural networks, and case-based reasoning.*Building and Environment,*vol. 39, no. 10. pp. 1235-1242. [Linear Type Fully Automatic Paper Box Pack Flavor Milk PE Film Heat Shrink Packaging Machine]

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Paper received Apr. 2015

Revised paper Received Jul. 2016

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