... Servo-Mechanical Design of High- Performance Mechanical Systems Yan Zhi Tan B.Eng (Hons.), National University of Singapore, 2010 A DISSERTATION SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY NUS ... along with the presentation of the design steps 2.3.2 Design Procedure With reference to Figure 2.3, the steps for using the proposed integrated servo-mechanical design algorithm are • Step 1: Design ... vibrations of the resonant modes and NRRO resulting from external disturbances In this dissertation, the focus of integrated servo-mechanical design is on the attenuation of the former With the use of...
Ngày tải lên: 09/09/2015, 08:17
... currents, iga , igb , igc with FBD theory based grid current estimator, with grid power command, Pg = 60 W and Qg = V ar with non-linear load with PL = 75 W with b6 topology of inverter and Vp = 49.3 ... Pg = −200 W and Qg = V ar with non-linear load with PL = with b6 topology of inverter and Vp = 49.73 V and Vn = 9.95 V 175 8.1 Details of the power circuit of the experiment using b-4 ... 60 W and Qg = V ar with non-linear load with PL = 65 W with b-4 topology of inverter and Vp = 46.2 V and Vn = 9.25 V 196 8.8 Details of the power circuit of the experiment...
Ngày tải lên: 09/09/2015, 18:56
Analysis, design and implementation of high performance control schemes for three phase PWM AC DC voltage source converter
... results of dynamic performance of PWM rectifier with a dual rotating d-q frame PI controller designed by the traditional method 134 4.17 Experimental results of dynamic ... diagram of PI controller with a plug-in type repetitive controller.145 List of Figures xxii 5.3 Bode plot of Ccl (z) for three phase PWM rectifier 146 5.4 Plot of phase angle γ(ω) with ... currents These two parts of the proposed control scheme can be implemented by the cascaded dual frame current regulator with a voltage regulator to ensure high- performance of the three phase PWM...
Ngày tải lên: 11/09/2015, 16:02
The Future of High Performance Database Processing
... High- Performance, High- Reliability Implementation of SQL," Workshop on High Performance Transaction Systems, Asilomar, CA, September 1987 [TAND88] Tandem Performance Group, "A Benchmark of Non-Stop ... shared-nothing design with a software dataflow architecture This is consistent with our assertion that current parallel database machines systems use conventional hardware But the special-purpose design of ... Dataflow Approach to SQL Software Terabyte online databases, consisting of billions of records, are becoming common as the price of online storage decreases These databases are often represented and...
Ngày tải lên: 28/04/2014, 13:30
Báo cáo hóa học: " Research Article Development and Evaluation of High-Performance Decorrelation Algorithms for the Nonalternating 3D Wavelet Transform" pdf
... improve the overall performance of the nonalternating classic algorithm, in terms of the processing time, speed-up, and the quality of the signal 2.3 GOF-based 3D-WT One of the major challenges ... dealing with huge volumes of data In fact, many studies have focused on reducing the impact of the I/O methods being used over the performance of parallel algorithms involving the processing of large ... frames are divided into blocks of rows, Xi , with i = 1, 2, , N, where N denotes the number of processors The ith processor receives the ith block of rows, within a GOF Figure illustrates the way...
Ngày tải lên: 22/06/2014, 19:20
This article appears in the February 2010 issue ofThe journal of high-performance potx
... should not be viewed as professional advice with respect to your business Accenture, its logo, and High Performance Delivered are trademarks of Accenture The use herein of trademarks that may be ... they primarily need large numbers of people with more general skills or smaller numbers of specialized, high- end talent We explored three different aspects of the workforce equation to understand ... is, energy consumption per dollar of GDP) Our analysis suggests that, with a couple of notable exceptions, the concepts of resource endowment and efficiency are often mutually exclusive (see chart,...
Ngày tải lên: 28/06/2014, 17:20
This article originally appeared in the 2012, issue ofThe journal of high-performance ppt
... treated digital as a separate channel, with separate leadership, a separate organization, separate capabilities and separate technologies The approach is not without some advantages, with @WalmartLabs, ... shapes, colors and designs Outlook 2012 Number The combination of virtual research with physical quantitative research enables P&G teams to understand consumer expectations and design and deliver ... flexibility of the work environment to what sorts of devices employees can use to their work Outlook 2012 Number For traditional managers, opinionated, high- energy digital talent—often part of the...
Ngày tải lên: 28/06/2014, 17:20
Báo cáo nghiên cứu khoa học: "Analysis of Early-age cracking in restrained ring specimens of high performance concrete using finite element method" pdf
... layer exceeds the tensile strength of concrete (f’ t) The ring specimens The FEM of the ring test was performed using the software of ANSYS The dimensions of the ring setup and the boundary conditions ... was used as input using the assumption of a constrained radial displacement of the nodes of the outer circumference of the steel ring The average strain of the steel ring was taken equal to -70 ... extension in the direction of the axis of the ring It is interesting to note that the sum r + is constant through the thickness of the wall of the ring, as theory of elasticity proposes As...
Ngày tải lên: 21/07/2014, 17:21
Early age shrinkage monitoring of high performance cementitious mixtures using monolithic and composite prism specimens
... increasing demands of material performance, one of which is the introduction of enhanced cementitious mixtures also known as High Performance Cementitious Mixtures (HPCM) or High Performance Concrete ... mixtures with different silica fume contents 35 Figure 2.15 (a) P-wave velocity of mortar and concrete cast with w/c ratio of 0.35; and (b) Pwave velocity of concrete cast with w/c ratio of ... VERSUS DEPTH OF HIGH PERFORMANCE CEMENTITIOUS MIXTURES 4.1 Introduction 83 4.1.1 Effect of High- range water reducing admixture (i.e HRWRA / superplasticizer) 85 4.1.2 Effect of aggregate...
Ngày tải lên: 10/09/2015, 15:52
Control of high performance single phase DC AC inverter
... pulse pattern With the development of power semiconductor device technology, the use of IGBT switch makes high switching frequency PWM inverters with improved control performance at high power level ... improving system performance of a static UPS system 1.1.1 Control of DC-AC Inverters In control of DC-AC inverters, Total Harmonic Distortion (THD) of the output voltage and dynamic response of the converter ... variation of model parameters • The effect of learning gain of the performance of the time domain based repetitive control has been investigated through analysis A simplified model of the time...
Ngày tải lên: 03/10/2015, 21:56
Desalination by membrane distillation fabrication of high performance membranes
... process PVDF is a highly thermal and chemical resistant polymer with a high hydrophobicity that corresponds very well to the properties required for a high performance MD membrane The highly hydrophobic ... transfer…………………………………………………………………………… 22 3.3 Characteristics of a high performance MD membrane………………………………… 24 3.3.1 High membrane permeability…………………………………………………… 24 3.3.2 High membrane wetting resistance and long ... flux as high as 55 kg/m2hr and energy efficiency of 83% at 90 °C was achieved in the test The obtained flux is much higher than most of the previous reports, indicating that the application of dual...
Ngày tải lên: 04/10/2015, 10:24
Early age deformation characteristics of high performance concrete
... Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.25, 5% SF and granite (Mix S25-5) 78 Table 4.4 Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.25, ... Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.25, 15% SF and granite (Mix S25-15) 80 Table 4.6 Modulus of Elasticity of the Control Concrete Mixture with w/b ratio of ... Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.35, 5% SF and granite (Mix S35-5) 82 Table 4.8 Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.35,...
Ngày tải lên: 04/10/2015, 17:07
Early age deformation characteristics of high performance concrete
... Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.25, 5% SF and granite (Mix S25-5) 78 Table 4.4 Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.25, ... Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.25, 15% SF and granite (Mix S25-15) 80 Table 4.6 Modulus of Elasticity of the Control Concrete Mixture with w/b ratio of ... Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.35, 5% SF and granite (Mix S35-5) 82 Table 4.8 Modulus of Elasticity of the Concrete Mixture with w/b ratio of 0.35,...
Ngày tải lên: 05/10/2015, 19:00
Preparation and photoluminescence of high density siox nanowires with fe3o4 nanoparticles catalyst
... scale, high density SiOx nanowires have been synthesized by using a novel nm Fe3O4 nanoparticles catalyst The SiOx nanowires with lengths of several tens to hundreds of micrometers and diameters of ... magnification SEM image of nanowire tops, (d) EDS of the nanowires X.J Wang et al / Materials Letters 63 (2009) 1149–1152 1151 Fig TEM and HRTEM images of SiOx nanowires intensities of Fe3O4 nanoparticles ... Large scale, high density nanowires are uniformly covered on the surface of Si(111) substrate, as illustrated in Fig 2(a) and (b) The lengths of these nanowires are in the range of several tens...
Ngày tải lên: 16/03/2014, 15:11
Báo cáo Y học: Biophysical characterization of the interaction of high-density lipoprotein (HDL) with endotoxins doc
... Preincubation of the cells with LPS Re (30 at 37 °C) and following addition of HDL, preincubation of the cells with HDL and subsequent addition of LPS Re, and incubation of the cells with [LPS Re]–[HDL] ... three types of experiments with LPS Re and HDL have been carried out Preincubation of the cells with LPS Re (30 at 37 °C) and following addition of HDL, preincubation of the cells with HDL and ... was performed with lipid A at 40 °C and at different concentrations of HDL The diffraction patterns of pure lipid A (Fig 6, top) are indicative of a superposition of a unilamellar with a cubic...
Ngày tải lên: 17/03/2014, 10:20
DEFCON: High-Performance Event Processing with Information Security pdf
... Lb = (Sb , Ib ) 3.1.2 Anatomy of events A key aspect of our model is the use of information flow control at the granularity of events An event consists of a number of event parts Each part has ... 1400 1600 1800 2000 Number of Traders Figure 7: Amount of used memory in DEFC ON as a function of the number of traders tencies rise to approximately ms without and ms with isolation This behaviour ... overhead of 50 MiB for 200 Traders, and up to 200 MiB for 2,000 Traders Marketcetera performance We compare the results from DEFC ON with the performance of Marketcetera The median throughput of Marketcetera...
Ngày tải lên: 23/03/2014, 13:20
essential app engine [electronic resource] building high performance java apps with google app engine
... Engine offers the datastore as NoSQL storage It allows you to store entities, each with a set of key-value pairs A value can also consist of an array of values Benefits of the App Engine offering ... A common characteristic of NoSQL databases is high scalability NoSQL databases are designed specifically with the requirements of the Internet in mind To serve millions of visitors around the ... level of classic office automation The frontrunners in Internet technology are critically investigating all parts of their systems and analyzing their designs for fit with the requirements of the...
Ngày tải lên: 30/05/2014, 23:53
Sun Fundamentals of Solaris 7 Student Guide With Instructor Notes phần 1 pps
... decompilation No part of this product or document may be reproduced in any form by any means without prior written authorization of Sun and its licensors, if any Third-party software, including ... Environment used with the Solaris™ operating system Upon completion of this class, you will have an understanding of basic UNIX commands and feel comfortable using the many components of the windowing ... experience with useful UNIX commands You will also learn to use and customize the features of the Common Desktop Environment (CDE) During the course of this class you will learn how to log in and out of...
Ngày tải lên: 13/08/2014, 02:23
Sun Fundamentals of Solaris 7 Student Guide With Instructor Notes phần 2 docx
... outline of the window will be displayed on your screen When the outline is in the desired position, click once with the left mouse button and the window will move there Fundamentals of Solaris ... characteristics of an effective password u Change your password u Describe the function of a mouse button u Log in and log out of a system from the command line u Log in and out of a CDE session ... 2-10 Fundamentals of Solaris Copyright 1999 Sun Microsystems, Inc All Rights Reserved Enterprise Services August 1999, Revision D Logging in The Options Button If a user chooses to work with...
Ngày tải lên: 13/08/2014, 02:23
Sun Fundamentals of Solaris 7 Student Guide With Instructor Notes phần 3 pps
... Style Manager and undertake each of the following tasks: w Increase the size of your font display w Change the backdrop of your current workspace w Change the backdrop of workspace Three w Turn on ... to display information You can perform searches of parts of the AnswerBook or of the entire collection installed on your system Due to the amount of disk space which is taken up by the AnswerBook2 ... the / (root) directory For example: /home/user2/dir1/coffees root directory Delimiters Figure 5-2 5-4 Pathname With Delimiters Fundamentals of Solaris Copyright 1999 Sun Microsystems, Inc All Rights...
Ngày tải lên: 13/08/2014, 02:23