a mục tiêu giúp hs ơn tập về
Bảng tra cứu thuật ngữ mạng máy tính
Ngày tải lên :
28/05/2015, 07:00
... truyền thông liệu DES – Data Ecryption Standard Tiêu chuẩn mã h a liệu data frame Khung liệu 127 Data Link Layer Tầng liên kết liệu data stream Luồng liệu DTE – data terminal equipment Thiết bị ... trang in, định ngh a hình dạng cuối trang in parity Thủ tục kiểm lỗi chẵn lẻ partition Phần chia đ a, phần hoạt động ơn vị độc lập vật lý PBX - Private Branch Exchance (PABX - Private Automated ... 132 MAC sublayer - Media Access Control sublayer Tầng MAC, mọt tầng nằm lớp Data Link mô hình OSI, chịu trách nhiệm giao tiếp với card mạng chuyển giao liệu gi a hai máy tính mạng medium Phương...
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Dissertation summary for doctoral philosophy program in education: Methods to develop communication skills for children with autism 3 4 years old
Ngày tải lên :
02/07/2014, 20:28
... for CwA CwA ability and they work effectively for CwA? We mark those - Advantages and disadvantages teachers experience while organizing program/Plan in 10 criteria equivalence to 10 points activities ... teaching for CwA 76,7% * Disadvantages 68,3% peers Because of limitted vocabulary, CwA have difficult to initiate CwA is delayed in speaking, vocabulary is less than that of normal communication ... Chronological We measured developmental areas for Đ .A by Small Step as age was 47 months, intelligent age was 38 months (compared to chronological following: Chronological age was 42 months, intelligent...
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Applying learning strategies to improve TOEFL listening skill of Advanced Program students at Thai Nguyen University of Technology
Ngày tải lên :
19/03/2015, 10:33
... 1 1 1 Total Conclusion score accept accept accept accept accept accept accept accept accept accept accept accept accept accept accept accept accept accept accept accept accept accept accept Item ... 2.2.3 Data analysis 2.2.3.1 SPSS Software The statistical analysis was conducted utilizing the Statistical Package for Social Sciences (SPSS), a software package used for statistical analysis ... observable - Are often conscious - Can be taught - Are flexible - Are influenced by a variety of factors In short, language learning strategies are applied by language learners as a means to acquire...
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Symbolic execution for advanced program reasoning
Ngày tải lên :
09/09/2015, 11:31
... specified target variables, similar to a slicing criterion These programs are ready to be analysed by a third-party application that seeks some information about the target variables, such as a verifier ... rather than actual data It has the advantage of avoiding “infeasible” paths in the program (i.e., paths that cannot be exercised for any input), exploring which could provide spurious information ... teaching, career and life in general I thank Baba (God) for bringing this great person into my life A special thanks goes to my old teammates Jorge Navas and Andrew Santosa who showed me that a...
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Introduction to Wireless Communications
Ngày tải lên :
13/09/2012, 10:52
... Can connect to a WLAN • Then collect data and transmit it to a central location 43 Wireless Advantages and Disadvantages • As with any new technology, wireless communications offers both advantages ... identify a stolen or counterfeit ticket – Can also give a real-time look at traffic flow – In-progress game statistics are available to any fan in the stadium with a wireless device 38 Travel • ... through a device called a wireless access point • Access point (AP) – Relays data signals between all of the devices in the network • Each computer on the WLAN has a wireless network interface card...
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Beyond WSE 3.0 - Looking Ahead to Windows Communication Foundation (WCF)
Ngày tải lên :
05/10/2013, 08:48
... formalizes data constructs and message constructs as contracts and defines them as follows: Data contracts: These are analogous to XML schema files and they document the data types that a Web ... received Today, messaging applications that are built around MSMQ are almost considered to be a nonstandard type of application If they were standard, then all of us would be incorporating message queues ... SecurityManager Controls application security requirements either programmatically or by using application and machine configuration files ServiceManager Manages the associations between communication...
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Tài liệu Car-to-Car Communication pptx
Ngày tải lên :
19/02/2014, 04:20
... into backend business processes So-called infrastructure-based services (e.g car-to-home data exchange, car-to-garage communications for remote diagnosis, Floating Car Data or Location Based Services) ... integrating cars into business processes are considered valuable: First, data such as geographical position, covered distance or average speed may be transmitted to a company's backend system to allow ... services can include accident warning, information on traffic jams or warning of an approaching rescue vehicle In addition, information on road or weather conditions can be exchanged More elaborate...
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Adaptive Traffic Lights Using Car-to-Car Communication pdf
Ngày tải lên :
16/03/2014, 12:20
... power attenuation due to the propagation distance Our simulator has two signal propagation models: free-space and plane earth tworay path loss While the first is an idealized model, the two-ray path ... Transport Research Ltd, Vermont South, Australia William C Taylor and Ahmed S Abdel-Rahim, “Incident management under SCAT adaptive control system FAST-TRAC Phase III Deliverable #11,” Final Report ... lights phases We have argued that this architecture has clear benefits compared to adaptive systems based on sensors or cameras We have developed an integrated simulator in order to validate the...
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a step by step guide to english communication skills - listen to me listen to you
Ngày tải lên :
27/03/2014, 13:39
... yourself and all participants Prepare group sets of materials from the Appendices as needed Have a supply of nametags and marker pens Arrange for a whiteboard or something similar, plus whiteboard ... in Australia by BPA Print Group National Library of Australia Cataloguing-in-Publication data: Author: Kotzman, Mandy Title: isten to me, listen to you: a step-by-step guide to communication ... motivating and liberating It’s easy to assume that your values are the same as other people’s, and that’s not a bad starting point in the absence of information to the contrary But while we may have...
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Advanced Trends in Wireless Communications Part 1 pptx
Ngày tải lên :
19/06/2014, 23:20
... Suvit Nakpeerayuth, Lunchakorn Wuttisittikulkij, Pisit Vanichchanunt, Warakorn Srichavengsup, Norrarat Wattanamongkhol, Robithoh Annur, Muhammad Saadi, Kamalas Wannakong and Siwaruk Siwamogsatham ... constant data rate can be maintained in the other states and henceforth a significant increase in capacity The outage capacity is defined as the maximum data rate that can be maintained in all nonoutage ... digital communications over fading channels (Karagiannidis et al., 2005; Sagias, Karagiannidis & Tombras, 2004; Sagias, Karagiannidis, Zogas, Mathiopoulos & Tombras, 2004; Sagias et al., 2003; Sagias...
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Advanced Trends in Wireless Communications Part 2 potx
Ngày tải lên :
19/06/2014, 23:20
... Channel Characterization and Performance Analysis of a 60 GHz near Gigabit System for WPAN Applications 25 2.2 Channel measurement and characterization The study of wave propagation appears as ... idea was to analyze the results of BER measurements with and without RS coding in a hallway separated by a door Indoor Channel Characterization and Performance Analysis of a 60 GHz near Gigabit ... the channel, mainly caused by the free space path loss and the shadowing effect, while the small-scale fading characterizes the signal changes in a local area, only within a range of a few wavelengths...
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Advanced Trends in Wireless Communications Part 3 pdf
Ngày tải lên :
19/06/2014, 23:20
... higher bandwidth and longer range An ad-hoc or mobile (e.g inter-aircraft) network that relies on high gain antennas also requires beam scanning Adaptive antenna arrays have found a wide rage of applications ... lowest data rate value of 169.4 kbps was obtained by the Half Wave Model antenna The results of the Quart Wave Model 2, Quart Wave Model and Half Wave Model antennas has followed a similar pattern ... independent gamma random variables, Ann Inst Statist Math (Part A) 37: 541–544 Peppas, K., Lazarakis, F., Alexandridis, A & Dangakis, K (2009) Error performance of digital modulation schemes...
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Advanced Trends in Wireless Communications Part 4 pdf
Ngày tải lên :
19/06/2014, 23:20
... spacing 4•ds A4 2 A4 3 A4 4 End-fire Antenna 4• d s A4 1 A3 1 A2 1 A1 1 A1 2 A3 2 A2 2 A1 3 A3 3 A2 3 A3 4 A2 4 A1 4 Antenna array element Layer Layer Layer Layer Fig Configuration of a 4x4 element square lattice ... large arrays for long range high data rate mm-wave communications In this hybrid antenna array, a large number of antenna elements are grouped into analogue sub-arrays Each sub-array uses an analogue ... the array is based on the antenna presented in Kaneda et al., 1998; Deal et al., 2000; Kaneda et al., 2002 As reported by Deal et al., 2000, a quasi-Yagi antenna is a compact and simple planar antenna...
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Advanced Trends in Wireless Communications Part 5 docx
Ngày tải lên :
19/06/2014, 23:20
... correlated and balanced diversity branches to the uncorrelated and unbalanced branches, but also can transfer the unbalanced and uncorrelated diversity branches to the balanced and correlated branches ... (4) In equation (16) the z0k and z1k are uncorrelated Gaussian random variables with zero mean and variances equal to the eigenvalues of the covariance matrix as in (3), and so are the values of ... this diagonalizer can transfer the correlated and balanced diversity branches to the uncorrelated and unbalanced branches, but also can transfer the unbalanced and uncorrelated diversity branches...
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Advanced Trends in Wireless Communications Part 6 ppt
Ngày tải lên :
19/06/2014, 23:20
... Shannon capacity (data rate) equation is the basis for spread spectrum systems, which typically operate at a very low SNR, but use a very large bandwidth in order to provide an acceptable data rate ... model parameters of a channel error sequence are computed, then a sequence of the model is generated and statistical parameters are computed The statistical parameters must be as equal as channel ... classic paper A Mathematical Theory of Communication” Shannon showed that error-free communication is possible on a noisy channel provided that the data rate is less than the channel capacity Shannon...
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Advanced Trends in Wireless Communications Part 7 potx
Ngày tải lên :
19/06/2014, 23:20
... a a2 a a l = 1tap a l = tap a a a0 τ 0 a a τ 233 τ a a1 τ 0 l = taps a2 a τ a τ 0 l = taps a Fig Pattern for the left and right shift zero, the received peak signal increases for an equal transmitted ... typically available whereas channel state information at the transmitter is in general more difficult to obtain Array gain means a power gain of signals that is achieved by using multiple-antennas at ... configurations remains almost the same The configurations which have multiple antennas at the transmitter (MISO and MIMO) have a better FG and IAP than the configurations having one antenna at the transmitter...
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Advanced Trends in Wireless Communications Part 8 ppt
Ngày tải lên :
19/06/2014, 23:20
... highways consists of a number of parallel lanes that have a certain lateral displacement Although a suitable representation of road lanes has been suggested, the data available today does not yet ... where a sudden change of direction can occur and a certain amount of past predictions may be invalidated To make applications aware of such differences, an additional output variable was added ... and they can have sufficient accuracy characteristics RF indoors localization methods are therefore means of attenuating AGV dead-reckoning navigation errors (Azenha & Carvalho, 2007b; Azenha...
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Advanced Trends in Wireless Communications Part 9 ppt
Ngày tải lên :
19/06/2014, 23:20
... inhomogeneous spatial capacity distribution in SIC networks, it is possible that some spatial areas have more capacity than the necessary and other zones not have capacity at all The quantitative comparison ... reason that having another scheme of calculating RSSI with for example an arithmetic mean leads to an output that is not appropriate for dealing with practical RSSI measurement accuracy With another ... measurement has a relationship with the RF propagation parameters A (dBm) and nAi (i = 1,…,n) These parameters change with these weather conditions and have different values as the signal attenuation...
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