experimental validation and performance optimization
Network storage system simulation and performance optimization
... both data and command When Command is added, it is placed to the head + b) Separate FIFO for command and data When transferring, the HBA check the command FIFO first Figure 3.8 Command Frame ... commands preemptively These measures are collectively named as the Command-First Algorithm Data Data Data Data Data Data Data Data FIFO head Data Data Data Data Command Command Command Command ... able to meet the enterprise’s performance demand To fill the performance gap and to optimize the cost and reliability, the storage system that can provide aggregated performance of multiple HDDs...
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Exergoeconomic performance optimization of an endoreversible intercooled regenerated Brayton cogeneration plant Part 1: Thermodynamic model and parameter analyses
... analysis and optimization [29, 30] is a relatively new method that combines exergy with conventional concepts from long-run engineering economic optimization to evaluate and optimize the design and performance ... (energetic efficiency) and second law (exergetic efficiency) of thermodynamics and investigated the effects of overall pressure ratio, cycle temperature ratio and pressure losses on the performance of ... price) on the optimal performances are discussed Finite-time thermodynamics (FTT) [7-18] is a powerful tool for analyzing and optimizing performance of various thermodynamic cycles and devices In recent...
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Exergoeconomic performance optimization of an endoreversible intercooled regenerated Brayton cogeneration plant Part 2: Heat conductance allocation and pressure ratio optimization
... U T , (uh )Π and π Π max, increase, and (ul )Π max, and (uk )Π max, max, decreases, (ui )Π max, decrease first and then increase Figures7 and show the characteristics of Π max, and (ηex )Π max, ... max, changes slightly, (uk )Π max, decreases, and (ui )Π max, , (ul )Π max, , and π Π max, increase Figures9 and 10 show the characteristics of Π max, and (ηex )Π max, , (u j )Π max, , j = h, l ... Figure that Π max, and (ηex )Π of b It can be seen from Figure 10 that with the increase of b , (uh )Π increases, (ul )Π max, decreases, and (ui )Π max, and π Π max, max, max, and π Π max, versus...
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Exergoeconomic performance optimization of an endoreversible intercooled regenerative Brayton combined heat and power plant coupled to variable-temperature heat reservoirs
... where CH and CH max are the smaller and the larger of the two capacitance rates CH and Cwf , CL and CL max are the smaller and the larger of the two capacitance rates CL and Cwf , CIm in and CIm ... analysis and optimization [29, 30] is a relatively new method that combines exergy with conventional concepts from long-run engineering economic optimization to evaluate and optimize the design and performance ... is a powerful tool for analyzing and optimizing performance of various thermodynamic cycles and devices Some authors have performed the performance analysis and optimization for various CHP plants...
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Hydrodynamic and performance of low power turbines: conception, modelling and experimental tests
... (Graphics and 5) These trend curves are drawn based on the optimal best efficiency point estimated by the CFD model and the experimental results Graphic Comparisons between experimental test and simulation: ... analysis of different scenarios and boundary conditions which are difficult to model experimentally These codes allow a better understanding of different hydraulic turbines and flow conditions [10] ... observed, depending on head and discharge coefficients, in order to cover a large range of applications (Graphics and 2) Graphic Variation of the discharge and head number and efficiency for different...
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An experimental investigation of performance and exhaust emission of a diesel engine fuelled with Jatropha biodiesel and its blends
... energy consumption and thermal efficiency were calculated The emissions such as CO, HC, and NOx were measured using exhaust gas analyzer and smoke with smoke meter These performance and emission characteristics ... unreacted remainder of methanol and catalyst which if not removed can react and damage storing and fuel carrying parts During washing ester present react with water and can form soap Two to three ... properties The fuel properties were determined and are listed in Table 1, for Jatropha oil methyl ester and diesel 2.3 Experimental set up The experimental setup shown in Figure consists of a...
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Portfolio optimization and performance analysis
... Yaari [506] and Kihlstrom and Mirman [327] The notions and definitions of “riskiness” based on stochastic dominance were suggested by Rothschild and Stiglitz ([435] and [436]) and Diamond and Stiglitz ... IX X II Portfolio Optimization and Performance Analysis Standard portfolio optimization Static optimization 3.1 Mean-variance analysis 3.1.1 Diversification ... 119 127 Portfolio performance 5.1 Standard performance measures 5.1.1 The Capital Asset Pricing Model 5.1.2 The three standard performance measures 5.1.3 Other performance measures...
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Microsoft® SQL ServerTM 2005 Performance Optimization and Tuning Handbook pptx
... ServerTM 2005 Performance Optimization and Tuning Handbook This Page Intentionally Left Blank Microsoft® SQL ServerTM 2005 Performance Optimization and Tuning Handbook Ken England Gavin Powell ... 217 Investigating and Influencing the Optimizer 257 SQL Server and Windows 307 10 Transactions and Locking 355 11 Architectural Performance Options and Choices 409 12 Monitoring Performance 421 ... compatibility 11 Architectural Performance Options and Choices 11.1 The Management Studio and the NET Framework 11.2 Striping and mirroring 11.2.1 RAID arrays 11.2.2 Partitioning and Parallel Processing...
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analytical method validation and instrument performance verification
... WILEY & SONS, INC., PUBLICATION ANALYTICAL METHOD VALIDATION AND INSTRUMENT PERFORMANCE VERIFICATION ANALYTICAL METHOD VALIDATION AND INSTRUMENT PERFORMANCE VERIFICATION Edited by CHUNG CHOW CHAN ... Fisher Apparatus and Its Performance Verification 221 Rick Jairam, Robert Metcalfe, and Yu-Hong Tse 15 The pH Meter and Its Performance Verification 229 Yu-Hong Tse, Rick Jairam, and Robert Metcalfe ... and culture The method validation section of this book discusses and provides guidance for the validation of common and not-so-common analytical methods that are used to support development and...
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microsoft sql server 2000 performance optimization and tuning handbook 2001
... Server and Windows 2000 in the areas of CPU, memory, and disk I/O How to track down and remove bottlenecks is explored Chapter introduces SQL Server locking mechanisms and strategies and the ... use of filegroups and multiple data and transaction log files will not be necessary to support their performance and administration requirements They will use one data file and one transaction ... follows: Expand the server group and expand the server Right-click Databases, then click New Database Enter the name of the database and collation on the General tab Enter the name, file, size, and attribute...
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Báo cáo hóa học: " Research Article Carrier Frequency Offset Estimation for Multiuser MIMO OFDM Uplink Using CAZAC Sequences: Performance and Sequence Optimization" ppt
... Gaussian and uncorrelated, the likelihood function for the channel H and CFO values φ can be written as Λ H, φ = 1 exp − R − A(φ)H N ×nr σn πσn , (6) where H and φ are trial values for H and φ and ... Communications and Networking were conducted to evaluate the performance of the CFO estimation using CAZAC sequences We first compare the performance using CAZAC sequences with the performance using ... sequences: (i) Frank and Zadoff Sequences [18], (ii) Chu Sequences [19], (iii) Polyphase Sequence by Sueshiro and Hatori (S&H Sequences) [20] Both Frank and Zadoff sequences and S&H sequences exist...
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Báo cáo hóa học: " Research Article Performance Optimization for Delay-Tolerant and Contention-Based Application in IEEE 802.16 Networks" pptx
... limited bandwidth and the expensive radio spectrum, the demand of performance optimization became more and more critical In most situations, the optimization target is to get a higher throughput and/ or ... available bandwidth in the data transmission period is very small and is deficient to fit all the bandwidth requests Then, only a few bandwidth requests could be granted And then little bandwidth ... transmit bandwidth requests, nrtPS connections may adopt a mandatory unicast polling and an optional contention-based polling, while BE connections adopt a mandatory contention-based polling and not...
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DAX query plans Introduction to performance analysis and DAX optimizations using query plans
... from the logical query plan and it makes use of different operators From the optimization point of view, it is the most important part of the trace to read and understand and, as you will see, it ... knowledge of the xVelocity engine internals and the ability to correctly read and interpret a DAX query plan In this paper we focus on very basic optimizations and we will guide you through the following ... Graupman and all our ssas-insiders friends I would also like to give a special thanks to T.K Anand, Marius Dumitru, Cristian Petculescu, Jeffrey Wang, Ashvini Sharma, and Akshai Mirchandani who...
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Lubrication and tribological performance optimizations for micro electro mechanical systems
... Sinha Kumar and Hugh Spikes, and also to Tom Reddyhoff for their patience and guidance throughout the research and dissertation writing I have been honoured to work with each of you and have learned ... reciprocating sliding wear, and the friction and wear results are analysed and presented Chapter compares the performance of two different lubricants – a perfluoropolyether and a multiply-alkylated ... well as specialized packaging and storage of devices (Potter 2005) These procedures and processes add to the cost of MEMS devices and their manufacturing and usage, and thus cause some potential...
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Mathematical modeling of direct liquid fuel cells multidimensional analytical solutions and experimental validation
... conditions and layout thus becomes possible 1.3 DLFC Modeling and Experimental Validation 1.3 DLFC Modeling and Experimental Validation Mathematical modelling provides a means to capture knowledge and ... 1.2 Technical and Implementation Issues with the DLFC 1.3 DLFC Modeling and Experimental Validation 1.4 Aim and Structure of Thesis ... agreement Experimental data chosen (typically polarization curves) for calibration are termed the training set, and the data chosen for validation are termed the testing set These calibration and validation...
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Performance optimization of a PEM hydrogen-oxygen fuel cell
... current In order to improve fuel cell performances, it is essential to understand these parametric effects on fuel cell operations To understand and improve the performance of PEMFCs, researchers ... physical understanding of the phenomena inside the cell They only correlate output with input Semi-empirical models are very useful for estimating the performance of PEM fuel cell stacks and optimization ... integration and operation The aim of this research is to design and construct a mathematical model for investigating the performance of a PEM fuel cell at different operation variables to optimize its performance...
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CFD for hydrodynamic efficiency and design optimization of key elements of SHP
... the operation and performance of turbines, and can cause dangerous hydropneumatic effects, such as noise and vibrations 1.4 Draft tube and tailrace Another challenge is to understand the hydrodynamic ... contracting and gives rise to new flow separation and thus to energy losses The formed vortices, which detach and disintegrate towards downstream, cause valve and pipe vibrations and give rise ... energy and its dissipation rate, the so-called k-ε model This paper shows the utility of the CFD numerical simulations as a tool for design and optimization of hydropower performance and flow...
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CFD and comparisons for a pump as turbine: Mesh reliability and performance concerns
... results of Suter parameters [6] and Derakhshan [5] with one experimental performance curve for a real PAT operating as a pump and turbine mode The variation of head, power and efficiency with the discharge ... results being QR and HR the rated conditions for the discharge and net head of the turbine Figure Comparison between experimental data and numerical simulation of a turbine overspeed and guide vane ... downstream and closure of a valve upstream Some results by Ramos et al are available for the first case and guide vane closure of a turbine, and they were obtained in lab conditions and compared...
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Numerical simulation and performance test of metal hydride hydrogen storage system
... porosity 90%, corrugated copper band, corrugated perforated aluminum band and copper cassette Dhaou et al [8] used the finned heat exchange system inside the reactor and revealed that the absorption/desorption ... heat and mass transfer process in a metal hydride bed From Jemni and Ben Nasrallah [9, 10] studies, two dimensional heat and mass transfer within a metal hydride reactor for both absorption and ... hydride powder and thermal management The heat and mass transfer model through metal hydride beds is a complicated phenomenon and heat transfer models including conduction, convection and radiation...
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Experimental investigations and CFD study of temperature distribution during oscillating combustion in a crucible furnace
... Comparison of experimental and CFD results 4.3 Comparison of experimental measurements and CFD results on temperature distribution It can be seen from Table and Figure that for T1 the experimental ... combustion and its performance characteristics such as process time, specific energy consumption, thermal efficiency and emissions Applied CFD numerical simulations and compared the experimental ... generation of turbulence kinetic energy due to buoyancy C1ε , C 2ε and C 3ε are constants σ k and σ ε are the turbulent Prandtl numbers for k and ε , respectively ISSN 2076-2895 (Print), ISSN 2076-2909...
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