systems and general systems

... MSSV:08520470 Sau đây là bài dịch chương II trong sách “Principles of Digital Communication Systems and Computer Networks” của nhóm em. Phần I – Các hệ thống truyền thông số (Digital Communation ... entropy là H = 4.07 bit/ký hiệu Lưu ý: Hãy xem xét câu sau: "I do not knw wheter this is undrstandble." Mặc dù thực tế là một số chữ cái là mất tích trong câu này nhưng bạn vẫn có thể làm...

Ngày tải lên: 18/09/2012, 10:13

... OFDM systems over time varying and frequency dispersive fading channels. With the increasing number of mobile phone users and higher demands for wireless services, future communication systems ... estimation for OFDM systems For wide-band wireless communication systems, the channel is time varying and dispersive fading, which will distort the transmitted signal. Thus, the accurate and real-time ... bit 2 /dB and 0.125 bit 2 /dB, when L = 2 and SNR ranges from 0 dB to 15 dB. The variance is reduced from 1.75 bit 2 to 1.30 bit 2 and from 1.48 bit 2 to 1.26 bit 2 , when SNR = 10 dB and L ...

Ngày tải lên: 20/11/2012, 11:28

... SHU: Short-term and Heavy rainy, SDG: S hort-term and Drainage, LSD: Long-term and Stagnant, LHT: Long-term and Heavy rainy, LMK: L ong-term and Monsoon flood, PDL: Persistent and Drainage, PHS: ... supply and (c) sanitation systems and attitudes for (d) water treatment at home, (e) children’s defecation habits and (f) hygiene practices Note: Communities code name, SRM: Short-term and Rainy, ... no latrine at all Hand washing with soap before eating Hand washi ng without s oap before eating No hand washing before eating Hand washing after defecation with soap Hand washing after defecation...

Ngày tải lên: 05/09/2013, 10:15

Ngày tải lên: 05/09/2013, 15:28

... wireless systems, the telecommunications scene and the services offered by 4G and future systems are not known yet and as a result aims for these systems may change over time. However, as 3G systems ... 2010 and beyond, there is time for 4G research and standards development. So far, no 4G standard has been defined and only speculations have been made regarding the structure and operation of 4G systems. ... vision of 4G and future mobile and wireless systems. Such systems target the market of 2010 and beyond, aiming to offer support to mobile applications demand- ing data rates of 50 Mbps and beyond....

Ngày tải lên: 29/09/2013, 21:20

Ngày tải lên: 04/10/2013, 19:10

... rotational, and hybrid actuators and sensors can be synthesized, and a motion classifier is { } ℵ∈=ℵ nn: . Therefore, we have ( ){ } ℵ∈∈∈∈=ℵ××× nTtGgMmntgmTGM and, ,:,,, . Winding and cooling, power and ... or characteristic. Let A stands for actuators, B stands for sensors, and C stands for translational motion microstructure. Then, the region ABC represents actuators and sensors which are synthesized ... are straightforwardly derived, and analysis and simulations can be performed. The actuators/sensors geometry and electromagnetic systems, as documented in Table 3.2.1, are partitioned into 3 horizontal and 6 vertical ©...

Ngày tải lên: 17/10/2013, 11:15

... NANO- AND MICROELECTROMECHANICAL SYSTEMS 4.1. FUNDAMENTALS OF ELECTROMAGNETIC RADIATION AND ANTENNAS IN NANO- AND MICROSCALE ELECTROMECHANICAL SYSTEMS The electromagnetic power is generated and ... fields, electric and magnetic field vectors form separate and independent pairs. That is, E and D are not related to H and B, and vice versa. However, for time- varying electric and magnetic fields, ... closed-loop systems use the data from different sensors, feedback commands (controls) are generated and executed, and intelligent updates and evolution are performed. The feedback for sensor and control...

Ngày tải lên: 19/10/2013, 18:15

... the stator and rotor circuitry dynamics. As the control and state variables we use the voltages applied to the stator (as and bs) and rotor (ar and br) windings, as well as the stator and rotor ... bs , and i cs are the phase currents in the stator windings as, bs and cs; i i qs ds , and i os are the quadrature-, direct-, and zero-axis components of stator currents; ψ ψ as bs , and ... ds , and ψ os are the quadrature-, direct-, and zero-axis components of stator flux linkages; u u ar br , and u cr are the voltages in the rotor windings ar, br and cr; u u qr dr , and u or ...

Ngày tải lên: 19/10/2013, 18:15

... file systems across a network. We’lllook at it in Chapter 25. • FreeBSD supports a number of file systems from other popular operating systems. Youmount the file systems with the mount command and ... groups of rwx: r stands for read permission, w stands for write permission, and x stands for execute permission. The three groups represent the permissions for the owner,the group and others respectively.Ifthe permission ... of file system. Local file systems on hard disk are always ufs ,and file systems on CD-ROM are cd9660.Remote file systems are always nfs.Specify swap partitions with swap ,and the proc file system with...

Ngày tải lên: 22/10/2013, 19:15

... changing standards for APIs, gateways, security methods, screens, operating systems, and browsers. There are also variable computing powers on the handheld devices and different bandwidth requirements. Wireless ... The WebSphere application server will handle the data dynamically and adapt it to the handheld device. Also it can run multiple applications and requests, and can be easily integrated to the backend ... install, configure and add new services: • The client application must be easy to install, customize, and add new handheld devices. • Easy to Integrate with other servers and Back-End systems: • Integration...

Ngày tải lên: 26/10/2013, 16:15

... Chaos Figure 1.2-7 Julia Propeller. Dynamical Systems and 2.1-2 Development of the disease for 0.3 and k = 0.5. Figure 2.1-3 Development of the disease for = 0.3 and k = 1 .O. In order to get a feeling ... dynamical system. In general by a system we understand a collection of elements and their effects on each other. That seems rather abstract. But in fact we are surrounded by systems. The weather, ... appropriate graphics commands included. and Button are machine-specific procedures. In and are system procedures. This is the case for Turbo Pascal on MS-DOS machines and for UCSD Pascal (see...

Ngày tải lên: 26/10/2013, 17:15

... Evolution and the Meanings of Life. New York: Simon and Schuster. Depew, D. J. 1998. Intelligent design and irreducible complexity. A rejoinder. Rhetoric and Public Affairs 1: 571–8. Depew, D. J., and ... Evolutionary Systems: Biological and Epistemological Perspectives on Selection and Self-Organization, ed. G. Van de Vijver, S. N. Salthe, and M. Delpos. Dordrecht: Kluwer, pp. 59–66. Weber, B. H., and ... Brains, Cities, and Software. New York: Scribner. Joyce, G. F., and L. E. Orgel 1993. Prospects for understanding the origin of the RNA world. In The RNA World, ed. R. F. Gesteland and J. F. Atkins....

Ngày tải lên: 01/11/2013, 07:20

Ngày tải lên: 04/11/2013, 20:15

... environment. 1.4.6.1 Forward and reverse links In general, cellular systems employ frequency division duplex (FDD) in which signals to and from the mobiles are sent in different frequency bands. Transmissions ... is H 4 = " H 2 H 2 H 2  H 2 # = 2 6 6 6 4 1111 1  11  1 11  1  1 1  1  11 3 7 7 7 5  (1.45) where row 1 and column 1 are Walsh code 0, or w 0 ;row3andcolumn3arew 1 ;row 4and column 4 are w 2 ; and row 2 and column 2 are w 3 . The Walsh code number w j is ... vectors g 1 = 101 ] and g 2 = 111 ] (1.17) and the corresponding code word  c 2  c 1 ] ,where c 1 = 2 6 4 b 2 b 1 b 0 3 7 5 g 1 and c 2 = 2 6 4 b 2 b 1 b 0 3 7 5 g 2  (1.18) and where b 0 , b 1 ,andb 2 are...

Ngày tải lên: 07/11/2013, 16:15

Ngày tải lên: 09/11/2013, 05:15

Ngày tải lên: 09/11/2013, 05:15

... Specify orientation of a figure 8 Signals and Systems Commands The following commands are organized by topics in signals and systems. Each of these commands has a number of options that extend ... commands 11 7.2 Customization of plots . 11 8 Signals and Systems Commands 11 8.1 Polynomials . . . 11 8.2 Laplace and Z Transforms 12 8.3Frequency responses . . 13 8.4 Fourier transforms and ... command 1; MATLAB command 2; MATLAB command 3; The name of the m-file for this function is functionname.m and it is called from the MATLAB command line or from another m-file by the following command >>...

Ngày tải lên: 12/12/2013, 07:15

... this view have already been built and are described in Rich Sidner and Lesh (2001), Babaian, Grosz and Shieber (2002), Ryall, Marks and Shieber (1997), and Ortiz and Grosz (2002). Theories of collaboration ... analysis and design of organizations in multi-agent systems. ICMAS-98, Paris, France, 128-135. Fox, M. S. (1981). An organizational view of distributed systems. IEEE Transac- tion on Systems, Man and ... declarative specification of preconditions and effects of system’s actions and applies artificial intelligence, automated reasoning, and planning framework and techniques to dynamically recognize...

Ngày tải lên: 13/12/2013, 01:15

... large and complex information system rapidly and effectively. And the key issue in research is how to organize the local agents and problem solving within the network, so that in the fixed period and ... relationship between organization theory and distributed systems, and argued that by viewing distributed systems as analogues to human organizations, concepts and theories germane to the manage- ment ... Framework Using CORBA, Mobile Agents and Web-Based Technologies 298 Dongming Cui, The University of Auckland, New Zealand Jairo A. Gutiérrez, The University of Auckland, New Zealand About the Authors 310 Index...

Ngày tải lên: 13/12/2013, 01:15