Design and implementation of a testbed for indoor mimo systems
The Design and Implementation of a Log-Structured File System
... purpose The separate data area of these database systems means that they not need the segment cleaning mechanisms of the Sprite LFS to reclaim log space The space occupied by the log in a database system ... log as the most up to date ‘‘truth’’ about the state of the data on disk The main difference is that database systems not use the log as the final repository for data: a separate data area is reserved ... has the disadvantage of increasing the amount of data lost during a crash For this paper we will assume that crashes are infrequent and that it is acceptable to lose a few seconds or minutes of...
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Design and Implementation of a Three-Phase Induction Motor Control Scheme
... processes and variables are modelled mathematically Furthermore, the MATLAB program can convert a MATLAB design into a C-code design in a relatively straightforward manner Hence, this stage of the ... two-phase currents to generate a means of instantaneously controlling the torque and flux Field-orientated controllers require control of both magnitude and phase of the AC quantities and are, ... the induction motor s many advantages are clearly explained Wildi also presents the two types of induction motors: “the squirrel cage induction motor and the “wound motor An explanation of the...
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Tài liệu Experiences in Design and Implementation of a High Performance Transport Protocol doc
... Efficiency and Fairness Characteristics • Takes 7.5 seconds to reach 90% of the link capacity, independent of BDP • Satisfies max-min fairness if all the flows have the same end-to-end link capacity ... (Additive Increase Multiplicative Decrease) • Fair: max-min fairness • Stable: globally asynchronously stable • But, inefficient and not scalable – In grid networks (with high bandwidth-delay product) ... shortcomings of TCP • We explained the design rationale and implementations details in this paper Future Work • Bandwidth Estimation • CPU utilization – Self-clocking – Code optimization • Theoretical...
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Tài liệu Báo cáo khoa học: "DESIGN AND IMPLEMENTATION OF A LLXICAL DATA BASE " docx
... be of primary importance for any "real life" system involving a large lexical data base is what I would call "practical requirements" and has to with the complexity of the task of creating a lexical ... instance, a translation system or any other type of natural language processing program that must be able to handle very large amounts of text necessitates dictionaries of substantial size, of ... order of at least tens of thousands of entries, perhaps even more than I00,000 lexical entries Needless to say the task of creating as well as the one of updating such huge databases represents an...
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The Design and Implementation of a Sequence Database System * docx
... supports relational data as well as sequencedata, using a novel design paradigm of enhancedabstractdata types (BADTs ) The systemimplementation basedon this paradigmallows sequence relational queriesto ... PIVceeding of the ACM SIGMOD Conference on Management of Data, May 1994 [CS92] RakeshChandmand Arie Segev.ManagingTemporalFinancial Data in anExtensible Database. In Proceedings of the International Conference ... that drill down and up the dimensions) There are also severalopen researchissuesin the design of systemsbasedon the E-ADT paradigm, and in extensions of the paradigm to handle optimizations that...
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Báo cáo hóa học: " Advancing donor management research: design and implementation of a large, randomized, placebo-controlled trial" pot
... water [abstract] J Heart Lung Transpl 2009, 28:S71 doi:10.1186/2110-5820-1-20 Cite this article as: Ware et al.: Advancing donor management research: design and implementation of a large, randomized, ... 4California Transplant Donor Network, Oakland, CA, USA 5Department of Medicine, University of California, San Francisco, CA, USA 6Department of Anesthesia, University of California, San Francisco, CA, ... across a wide variety of critically ill patients with acute pulmonary edema Inhaled beta-2 agonists increase the rate of alveolar fluid clearance and reduce pulmonary edema in both animal and human...
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Báo cáo hóa học: " Research Article Design and Implementation of a Lightweight Security Model to Prevent IEEE 802.11 Wireless DoS Attacks" pdf
... IEEE 802.11 standard, except for the unicast data and management frames that are transmitted in the normal data rates, the other frames including multicast, broadcast, and control frames are transmitted ... ability to prevent both wireless DoS attacks and synchronization attacks as the following scenarios 5.3.1 DoS Attacks The details of the strategy to conduct variety types of wireless DoS attacks against ... current model It consists of two areas as authorized and attacker The authorized area consists of two wireless stations associated to the access point which follow the IEEE 802.11 standard MAC layer...
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Báo cáo hóa học: " Research Article Design and Implementation of a Generic Energy-Harvesting Framework Applied to the Evaluation of a Large-Scale Electronic Shelf-Labeling Wireless Sensor Network" pdf
... know that the capacitance (stated in terms of the amount of charge (Q) stored at a given voltage drop (across the capacitor)) of a capacitor is given by (1) (Note that: the SI unit of capacitance ... is the farad; farad = coulomb per volt; typical capacitances are measured in microfarads or picofarads) 5.2.1 The Virtual Capacitor To implement the law of Coulomb, a TinyOS application was developed ... Castalia [10] was created out of the need to have a simulator designed for WSN research It has advanced and accurate radio and wireless channel models Castalia is built on OMNeT++, a framework which...
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báo cáo hóa học:" Research Article Design and Implementation of a Testbed for IEEE 802.15.4 (Zigbee) Performance Measurements" doc
... for that particular packet All of these packets are picked up by BaseStation.java listening on the USB port and it saves each consecutive packet in a file for future analysis A new file is created ... created for each trial A second Java program (Analyze.java) was developed to analyze the saved files containing the received packets Since the transmitted data is known, this program can easily calculate ... channel, the transmitter node always transmits the same data packet The first octets are AM BER = header information and the dummy data payload is decimal number 85 which was chosen simply because...
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báo cáo hóa học:" Research Article Design and Implementation of a Single-Frequency Mesh Network Using OpenAirInterface" docx
... channel measurements which can be used for channel characterization and capacity analysis [2] Apart from a general overview of OpenAirInterface, in this paper we present OpenAirMesh a specification ... node Variable bit-rate traffic channel with negotiated QoS parameters used by the mesh network to transport data traffic corresponding to a particular flow Table 4: Transport and physical channels Each ... norm of a vector a is denoted by a and the Frobenius norm of a matrix A is denoted by A F E denotes expectation, and EURASIP Journal on Wireless Communications and Networking Table 1: Hardware...
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Báo cáo hóa học: "Design and implementation of a real time and train less eye state recognition system" docx
... and implementation of a real time and train less eye state recognition system Mohammad Dehnavi*1 and Mohammad Eshghi1 ECE Department, Shahid Beheshti University, Tehran, Iran *Corresponding author: ... light, and the color of eyebrow and eyelash highly affect the accuracy of the proposed algorithm in [10] Algorithms in [11, 15, 16] have a training phase and also their hardware implementation ... Authors of [6, 7] use the fact that the iris and pupil are darker than skin and white part of the eye Authors of [11] proposed an algorithm based on the cascade AdaBoost classifier In [12], a...
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Báo cáo y học: "Practising evidence-based medicine: the design and implementation of a multidisciplinary team-driven extubation protocol" pptx
... potentially accelerate decision-making with regard to extubation; and to assess the safety and feasibility of our approach Materials and method The intervention was carried out in a 14-bed medical/surgical ... evidence-based medicine into the setting of the ICU by promoting a multidisciplinary approach to extubation, and to design a protocol that was acceptable to all medical staff involved in the extubation ... criticism, and feedback was given on a regular basis Based on the feedback, the protocol was regularly re-evaluated and updated Nurses and RCPs responded favourably to the MDT-driven extubation protocol...
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Design and implementation of a testbed for indoor mimo systems
... channel In addition, w e only pay attention to uniform antenna arrays in this section, that is, all an tennas are aligned and equally separated in the tran sm it and receive antenna arrays 8 2.2.1 ... create b aseb and signal and m odulation type to be applied in the tran sm itter and to receive reco vered data signal for channel capacity co m p u tin g (figure 19) Both b aseb an d and IF parts ... creates a sine w ave o f 12.5M H z to shift base b a n d signal to IF band before passing through D ACs Figure 23: Baseband Transmitter Diagram a) Data G en erato r b) W alsh code G en erato...
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