tài liệu william stallings data and computer communications pdf

... combined computer- communications industry The computer- communications revolution has produced several remarkable facts: + There is no fundamental difference between data processing (computers) and data ... the data And the receiver of data may wish to be assured that the received data have not been altered in transit and that the data actually come from the purported sender Finally, a data communications ... transmit and process all types of data and information Both the technology and the technical standards or- ganizations are driving toward integrated public systems that make virtually all data and

Ngày tải lên: 13/09/2012, 10:21

... activities and research... programs and strategies Government-sponsored programs in the Asia-Pacific region, Europe (pan-European and national), and the United States (federal and state) ... philosophies and key priorities of both vehicle manufacturers and major suppliers are discussed to provide both a “reality check” and a context... 2000” proposed a National Initiative and set ... technology; the market introductions and deployment prospects; the user, customer, and societal issues; and the author’s prognosis for the future rollout of products and integrated vehicle- highway

Ngày tải lên: 19/01/2014, 23:20

... nonquadratic function, and is a standardized gaussian variable. Such a measure could be used for noisy data as well, if only we were able to estimate of the noise-free data from the noisy observations ... in itself, and thus the noise is usually neglected in order to obtain tractable and simple results. Moreover, it may 296 NOISY ICA be unrealistic in many cases to assume that the data could be ... the noisy data. In the following, we call this operation “quasiwhitening”. After this operation, the quasiwhitened data follows a noisy ICA model as well: (15.8) where is orthogonal ,and is a linear

Ngày tải lên: 20/01/2014, 11:20

... categories: ² Handover because of more favorable path loss conditions ² Mandatory intercell handover ² Mandatory intracell handover 200 Roaming and Switching Table 8.1 Threshold values for the GSM handover ... standardizing only the signaling interface that de®nes the processing of the handover and through transferring the handover decision to the BSS The GSM handover is thus a network-originated handover ... its participation in the handover decision The MSC causes the new BSS to prepare a channel for the handover, and frees the handover to the mobile station (handover command), as soon as the reservation

Ngày tải lên: 20/01/2014, 23:20

... its children The BookProduct class should handle the $numPages argument and property, and the CdProduct class should handle the $playLength argument and property To make this work, I will define ... the example; instanceof resolves to true if the object in the lefthand operand is of the type represented by the right-hand operand Once again, I have been forced to include a new layer of complexity ... variables and quotation marks, and, if the callback grows to any size, it can be very hard to read indeed Wouldn't it be neater if there were a more Please purchase PDF Split-Merge on www.verypdf.com

Ngày tải lên: 21/01/2014, 16:20

... interaction and presenting them with surprising clarity 118 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark CHAPTER ■ OBJECTS AND DESIGN ■Note Look at Figures 6–16 and 6–20 ... the book Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark 119 CHAPTER ■ OBJECTS AND DESIGN 120 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark ... Patterns Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark 121 CHAPTER ■ PHP: DESIGN AND MANAGEMENT Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark

Ngày tải lên: 21/01/2014, 16:20

... findField_txt text field and pressing the button. 7. Close the test movie and save your work as wordProcessor2.fla. You can see how easy it is to use the methods associated with the String and Selection ... zipLength equals 5 and another if it doesn't. The Selection class allows you to control various aspects of the currently focused text field, including highlighting text, getting and setting the ... many of the String and Selection class methods we've discussed. 1. Open wordProcessor1.fla in the Lesson04/Assets folder. This file has three layers: Background, Buttons, and Actions. The

Ngày tải lên: 26/01/2014, 11:20

... inputs for the handover and power control algorithms The measurement objects are on the one hand the uplink and downlink of the current channel (TCH or SDCCH), and on the other hand the BCCH carriers ... channel-coded and enciphered data blocks (Figure 5.2) Figure 5.2: Steps of GSM digital modulation The data di arrives at the modulator with a bit rate of 1625/6 kbit/s ˆ 270.83 kbit/s (gross data rate) and ... decoded, error-corrected data blocks and comparison with the received data Since the data before error correction is presented as blocks of 456 bits (see Section 6.2 and Figure 6.10), the bit

Ngày tải lên: 26/01/2014, 12:20

... speed and low power (b) Small delay and low power (c) Small delay and low skew (d) Low inductance and low skew (e) Low power and high density Please purchase PDF Split-Merge on www.verypdf.com ... • Understand the need for proper simulation, review, and testing techniques during and after the process 4.1 What is UDM and UDM-PD? Please purchase PDF Split-Merge on www.verypdf.com ... purchase PDF Split-Merge on www.verypdf.com to remove this watermark In this chapter • UDM and UDM-PD • Specification and specification review • Devices and tools • Design, simulate, and

Ngày tải lên: 26/01/2014, 19:20

... clk; // system clock input d0; // data input input d1; // data input input sel; // select // OUTPUTS output z; // output Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Listing ... B.13 Figure 5.16 (Continued) Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. [...]... purchase PDF Split-Merge on www.verypdf.com to remove this watermark Let’s compare ... PDF Split-Merge on www.verypdf.com to remove this watermark Math Toolkit for Real-Time Programming by Jack W Crenshaw Develop a solid understanding of the math behind common functions — and

Ngày tải lên: 26/01/2014, 19:20

... protective, inclusive, and gender sensitive and that promote the nutrition and physical and psychosocial health of staff, teachers, and children • School environment: access to safe water and provision ... Sheldon Shaeffer, Matthew Jukes, and others efficiency and productivity (Jamison and Lau 1982; Psacharopoulos and Woodhall 1985; Strauss and Thomas 1995) Psacharopoulos and Patrinos (2002) summarize ... (Berkley and Jamison 1990; Bundy and Guyatt 1996) This paradigm shift coincided with the World Conference on Education for All in Jomtien, Thailand, in 1990 and led to renewed efforts by countries and

Ngày tải lên: 14/02/2014, 13:20

... allocated to program and data May be a number of program and data segments Advantages of Segmentation § Simplifies handling of growing data structures § Allows programs to be altered and recompiled ... Objectives and Functions § Convenience • Making the computer easier to use § Efficiency • Allowing better use of computer resources Layers and Views of a Computer System Operating ... re-linking and re-loading § Lends itself to sharing among processes § Lends itself to protection § Some systems combine segmentation with paging Required Reading § Stallings chapter § Stallings, ...

Ngày tải lên: 12/12/2013, 09:15

... Operands can also be represented in this way • ADD A,B Instruction Types § Data processing • Arithmetic & Logic instruction ü Process numeric data ü Operates on bits of the word as bits and not ... Pentium Floating Point Data Types § See Stallings p324 Types of Operation § § § § § § § Data Transfer Arithmetic Logical Conversion I/O System Control Transfer of Control Data Transfer § Specify ... CISC Types of Operand § Addresses § Numbers • Integer/floating point § Characters • ASCII etc § Logical Data • Bits or flags § (Aside: Is there any difference between numbers and characters? Ask...

Ngày tải lên: 12/12/2013, 09:15

... the operand is Immediate Addressing § Operand is part of instruction § Operand = address field § e.g ADD • Add to contents of accumulator • is operand § No memory reference to fetch data § Fast ... Opcode operand Size of number is restricted to the size of operand filed Direct Addressing § Address field contains address of operand § Effective address EA = address field A § Operand = (EA) ... accesses to find operand § Hence slower Indirect Addressing Diagram Instruction Opcode Address A Memory Pointer to operand Operand Register Addressing (1) § § § § § Operand is held in register...

Ngày tải lên: 12/12/2013, 09:15

... Interpret instructions • Fetch data • Process data • Write data Registers § § § § § CPU must have some working space (temporary storage) Called registers Number and function vary between processor ... Control unit requests memory read • Result (address of operand) moved to MBR Data Flow (Fetch Diagram) Data Flow (Indirect Diagram) Data Flow (Execute) § May take many forms § Depends on instruction ... design and operating system design are closely linked Example Register Organizations Foreground Reading § Stallings Chapter 11 § Manufacturer web sites & specs Instruction Cycle § Revision § Stallings...

Ngày tải lên: 12/12/2013, 09:15

... Five and Six 11 12 CHAPTER / DATA COMMUNICATIONS, DATA NETWORKS, AND THE INTERNET 1.1 DATA COMMUNICATIONS AND NETWORKING FOR TODAY’S ENTERPRISE Effective and efficient data communication and networking ... Internet and Web Resources 0.4 Standards PART ONE OVERVIEW Chapter Data Communications, Data Networking, and the Internet 10 1.1 Data Communications and Networking for Today’s Enterprise 12 1.2 A Communications ... related to data and computer communications: • Network World: Information and links to resources about data communications and networking • IETF: Maintains archives that relate to the Internet and IETF...

Ngày tải lên: 05/06/2014, 07:58

... Likelihood and Score Functions 10.3.3 Estimating Functions 10.3.4 Simultaneous and Joint Diagonalization of Covariance Matrices and Estimating Functions 10.3.5 Standardized Estimating Function and Newton ... Technology, Finland [264] 30 1.19 Conceptual models for removing undesirable components like noise and artifacts and enhancing multi-sensory (e.g., EEG/MEG) data: (a) Using expert decision and hard ... using adaptive bandpass filter 202 5.9 Frequency characteristics of 4-th order Butterworth bandpass filter with adjustable center frequency and fixed bandwidth 204 5.1 5.10 Exemplary computer simulation...

Ngày tải lên: 10/12/2013, 14:15

... devices function in radio receivers and transmitters, telephone networks, digital computers and satellite links (to name just a few applications) Conductance and the siemens The better a substance ... silver Copper and aluminum are also excellent electrical conductors Iron, steel, and various other metals are fair to good conductors of electricity In most electrical circuits and systems, copper ... diodes, transistors, and integrated circuits in almost limitless variety These substances are what make it possible for you to have a computer in a briefcase That notebook computer, if it used...

Ngày tải lên: 13/12/2013, 01:15

... Hs and Hq are channels for signal and CCI, respectively, while ss and sq are the corresponding data sequences Note that Eq (68.7) appears to suggest that the signal and interference are band ... non-blind and single vs multi-user approaches Training Signal Methods In many mobile communications standards such as GSM and IS-54, explicit training signals are inserted inside the TDMA data bursts ... Vanderveen, M.C., Ng, B., Papadias, C.B and Paulraj, A.J., Joint angle and delay estimation (JADE) for signals in multipath environments, in 30th Asilomar Conference on Signals, Systems, and Computers,...

Ngày tải lên: 16/12/2013, 04:15