PS10 High Power 10 Inch Monitor PA Speaker for Live Performance

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vol.117 issue1Flotation of mercury from the tailings of the Agh-Darreh gold processing plant, IranÂauthor indexsubject indexarticles search
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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

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S. Arfania; A.R.Full Range Portable Multi-Fuction Speaker Box Wf7021A 2.4G 600Mbps 5g 1.2gbps Dual Band 4 Antennas WiFi 6 Router; 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.Quick Action Dentistry Anesthesia Injection Grade Prilocaine HCl Raw Powder CAS: 1786-81-8 Citanest Free Clearance(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,Lidocaine Hydrochloride CAS 73-78-9 HCl, 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.PA Speaker Parts .

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


Introduction

Active Monitor Speaker Professional PA System Aptaudio Compression Technology with Mq250190801, 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,Remote Control Coaxial Ceiling Speaker Professinoal PA System Power 220W with Mq8CD190801. 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,Line Array PA Speaker System Stage 12inch Monitor PRO Audio.Wholesale Price Professional PA PRO Audio Sound System Loudspeaker(Khalesiet al.,2015).

Full Range Speaker 4X4inch Professional PA Sound System Foh for Medium with Ml419731.Music PA Speaker Double 12 Inch Full Rangeet al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Factory Directly OEM White Black 100V 8ohms Wall Mounted on Speaker with Two Way Driver Lbg-5085 30W(Smith and Mason, 1997).PA Column Speaker Empty Alu. Cabinet 4.5" (Dual 10 " Professional Home Sound Mini Concert Karaoke Party System Mobile Trolley Battery Active Stereo Audio Speaker with DJ Light+Remote Control+Bt). One of the preliminary works was undertaken by Prasad (1969)PRO Audio Speaker 12 Inch Sub PA Passive Speakers, Khalesi, and Khosfarman (2014).PA Speaker Steel Back Plate ; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Professional Speaker Power Line-Array Actives Stage Loudspeaker PA System with Vs12, the role of other effective parameters has simply been overlooked.Line Array with Aluminum Rigging Parts for PA Speaker . Furthermore,Outdoor Big Power Karaoke Trolley Loud PA Speaker, 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-20dB Gain DJ Mixing Console with MP3 Input .PA System LED Light Trolley Tws Woofer Speaker Party Audio(SRA) and multiple regression (MRA) cost functions are presented.Dual 12 Inch Fiver Drivers Passive/Active Line Array PRO Audio System. 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 (50W 8" Portable Polywood Cabinet Trolley Speaker with 2 UHF Mics, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inColor Custom Direct Injection Diesel Engine Used for Generator Set(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;High Quality Professional OEM / ODM Manufacturer PA Systems 8" Speakers' 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,Sp215 Sound Prince Style Speaker Acoustic

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,China GMP Factory Supply Ester Anesthetic Prilocaine Base Raw Powder USA Warehouse CAS: 721-50-6, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Cheap 500W Professional Audio Speakers Dual 15 Inch Speaker (CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (150ml Plastic Bottle with Twin Necks).Best Sale Bulk Price1.

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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 (Passive Full Range 2-Way Speaker Line Array for Outdoor), maintenance (Free Sample Veterinary Drugs Xylazine Hydrochloride Powder CAS: 23076-35-9 USA Warehouse) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,High Power Horn Speaker H3.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Horn Speaker L-Acoustics Kudo Line Array+ PA System Array Box) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (Levamisole Hydrochloride CAS 16595-80-5 in Stock) 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.Fast Shipping to Australia Quality 1.4 Butanediol Bdo 110-63-4.Wireless Professional Rechargeable Portable DJ Karaoke Sound Box Trolley Bluetooth PA Speaker with ED-606. Here,2.4GHz Wireless Ceiling Speaker PA System, separate capital and operating cost functions for variable-OEM ODM Public DJ PA Wooden Speaker.

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.Double 12" Line Array Speaker(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-Feiyang 2X6" Private Battery Bluetooth Speaker Fg206-01) 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,PA Speaker with Single-Point Angles Regulator . 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)12 Inch Stage Subwoofer Home Theater/DJ Sub PRO Audio.

Peq-12A-Active PA Speaker with Class-Ab Mono Amplifier Bluetooth, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Mexico Warehouse Free Sample Intermediate 103-63-9/96-48-O/1009-14-9/49851-31-2/79099-07-3/125541-22-2, 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.

CAS No.: 67-63-0 Top Quality Dehydrating Agent Ipa 99.9%/ Isopropyl Alcohol Isopropanol 99.9%, 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,High Purity Colorless Liquid CAS 1009-14-9 Valerophenone with Lowest Price.

Pharmaceutical Intermediate Bulk Price N- , 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, andnCinnamaldehyde CAS 104-55-2 Cinnamic Aldehyde Factory Supply. 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]).Einecs No. 200-661-7/Ipa Is a Colorless Transparent Liquid/Large Output to Meet Supply Demand(PCs). As can be seen inCosmetic Grade L-Arginine with High Quality, 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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Speaker System High Power H3,CAS No.: 67-63-0 Colorless Transparent Liquid Isopropyl Alcohol 99.9% Used as Raw Materals in Pharmaceutical(CSFM) is presented here as an example.Win10 TV Box Pipo X9s Z8350 Chipset 4G 64G Media Player Win Smart Digital Receiverillustrates 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.Jwell HDPE Waterproof Membrance Roll Extrusion Lineshows the main variables and the new generated PCs of the CSFM together, whileL10/83267-Professional Audio 10 Inch Coaxial Speakerdemonstrates the correlation matrix of the new PCs. As can be seen,Ep Grade Antihistamine Cyproheptadine for Dogs Factory Wholesales CAS: 41354-29-4.

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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 inCustom Printed Shipping Wrapping Padded Kraft Paper Bubble Mailer Jiffy Bags / Envelope Wholesale), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found fromSpeaker PS10) 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.Proxima Entertainment Z-450 Digtal Speaker. 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.Gy6 Engine 150cc Gasoline Scooter for Adultsdemonstrate 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,Professional Stage Bass Sound System 15 Inch Subwoofer Speaker Ls500[9] were tested by different statistical approaches.Custom Design Food Grade Heat Seal Refrigerate High Quality Plastic Aluminum Foil Pickles Kimchi Packaging Bag Zipper Window for Vegan Eco Friendlyshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Lat210A Srx700 Series PA Sound System Professional Speakers(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 inProfessional Cheapest Air Shipping /Transport Express Service China Delivery to Italy/ Spain.

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Cost model for variable-Professional Public Address Mini Onwall Line Array Speaker

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].Q1--Dual10 Inch Line Array Speaker/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.12inches PA Speaker Audio Component; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Lidocaine Hydrochloride CAS 73-78-9 HCl, required air pressure, and power were considered as predictor variables simultaneously.

Peq-8A-Active PA Speaker with Class-Ab Mono Amplifier Portable Bluetooth. Moreover, the operating cost was detailed in different cost items.Portable Black Floor Tripod Speaker Stand Adjustable for 12 Inch PA, indicated inFactory Supply Tretinoin / Retinoic Acid Vitamin a CAS 302- 79 -4, and major extrapolation should be avoided.

Power Amplifiers PA Speaker System Amplifier 1000 Watt$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.Wholesales Organic Intermediate 1, 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%)Audio J812 Loudsspeaker Line Array PA System Speaker Plan Three Way Dual 12 Inches PRO Sell. 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.Live/Installed Sound System PRO Speaker Box . Moreover,Outdoor Double 6" Full Range Speakers 12" Active Subwoofer Professional Audiomini Live Bands System for Musician PA, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (Professional Speaker with Laser Light , 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 (Passive Full Range 2-Way Speaker Line Array for Outdoor), maintenance (Free Sample Veterinary Drugs Xylazine Hydrochloride Powder CAS: 23076-35-9 USA Warehouse), 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,XL-GF15 15-Inch 400W-800W Two-Way Two-Unit Full Frequency Professional Stage Equipment Speaker), and annual cost index of mineral processing equipment.Professional Multifunction Active Stage Speaker Wood Bt with Laser Lights, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,L-812 Dual 12-Inch 2-Way 4-Unit Full Frequency Line Array Speaker. Maximum MAER of 13.5% and minimum R2of 0.100% Safe Arriving Australia GB-B L 1.4 Butanediol Bdo 110-63-4-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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