Unilibrary. Oliy ta'lim muassasalarining yagona elektron kutubxona axborot tizimi.

Antenna Design for Cognitive Radio

This book introduces the topic of cognitive radio from an antenna design perspective. The book is the first of its kind on the design of antennas and RF front ends for cognitive radio. It targets antenna, RF design engineers and researchers, university professors, academics, and graduate and undergraduate students in the area of applied electromagnetism and communication systems. This book first introduces the concept of cognitive radio as a protocol that is designed to benefit from underutilized regions of the spectrum. The purpose of this new protocol, built on software-defined radio, is to achieve a dynamic spectrum access, thus allowing a more balanced and efficient communication. The cognitive radio protocol is based on sharing the spectrum with primary users whether by monitoring the channel for an idle opportunity or by broadcasting throughout a wide bandwidth at a low-power level. Therefore, antenna researchers aim at designing intelligent antenna systems that are aware of their surroundings, are reconfigurable, and are able to react and adjust to sudden changes.

Shaxs psixologiyasi

Ushbu darslik hozirgi kunda psixologiyaning alohida sohasi sifatida shaxs psixologiyasini to'liq tushunishga yordam berar ekan.

Инвестиционное право

Для студентов высших учебных заведений юридического профиля, обучающихся по программам академического бакалавриата и магистратуры, аспирантов, преподавателей, а также всех интересующихся вопросами инвестиционного права.

Antennas and Wave Propagation

Antennas are a key component of all types of wireless communication—be it the television sets in our homes, the FM radios in our automobiles, or the mobile phones which have become an almost integral part of most people's daily lives. All these devices require an antenna to function. In fact, it was an antenna which led Arno Penzias and Robert Wilson to their Nobel Prize winning discovery of cosmic background radiation. The study of antennas and their field patterns is an important aspect of understanding many applications of wireless transmission technology. Antennas vary widely in their shapes, sizes, and radiation characteristics. Depending on the usage requirements, an antenna can be a single piece of wire, a huge reflective disc, or a complex array of electrical and electronic components. The analysis of antennas is almost invariably concomitant with the study of the basic concepts of the propagation of electromagnetic waves through various propagation media and the discontinuities encountered in the path of propagation.

VETERINARIYA DIAGNOSTIKASI VA RENTGENOLOGIYASI

Hozirgi kunda respublikamizda chorvachilikni xususiy mulkchilik asosida jadal taraqqiy ettirish va rentabelli sohalardan biriga aylantirish orqali aholi turmush darajasini oshirish hamda ichki bozorni sifatli va xavfsiz chorvachilik oziq-ovqat mahsulotlari bilan barqaror to’ldirishning muhim omili sifatida rivojlantirishga katta e’tihor qaratilmoqda.Qishloq xo'jaligi O’zbekiston iqtisodiyotining muxim tarmoqlaridan biri hisoblanadi. Bu tarmoq mamlakatimiz aholisining oziq-ovqat mahsulotlariga, qayta ishlash sanoati tarmoqlarining esa xom ashyoga bo’lgan talabini qondirish bilan birga, eksport salohiyatini istiqbolli manbalaridan biri sanaladi.

История государства и права зарубежных стран. Новое и Новейшее время

Для студентов, аспирантов и преподавателей юридических вузов и факультетов, а также для всех интересующихся историей государства и права.

Qishloq xo'jalik ekinlari seleksiyasi va urug‘chiligi

Dehqonchilikning asosiy vazifasi ekinlar hosildorligini oshirish va sifatli mahsulot yetishtirishdir. Yer yuzidagi aholining yil sayin ko‘payishi, o‘sib borishi bilan foydalaniladigan, sug‘oriladigan yerlar maydoni o‘smasdan, chegaralangan holda qolmoqda. Aholini oziq-ovqat bilan, sanoatni esa xom-ashyo bilan ta’minlashning faqat bir yo‘li mavjud. U ham bo'Isa. qishloq xo‘jalik ekinlarining hosildorligini oshirishdir.

Практическое пособие для поваров III разряда

Цель пособия помочь работникам получить знания необходимые для присвоения им квалификатции повара III разряда.

RELIGIONS OF THE SILK ROAD. Premodern Patterns of Globalization. 2nd edition

The decade since thisbookwas firstpublishedhasbrought considerable feedback, much of it positive, some critical, but-significantly I think-it has not yet abated. The fact that the book continues to reach new readers is deeply gratifying, yet it also brings a sense of obligation.

Optical Waveguide Theory. Mathematical Models, Spectral Theory and Numerical Analysis

This book addresses the most advanced to-date mathematical approach and numerical methods in electromagnetic field theory and wave propagation. It presents the application of developed methods and techniques to the analysis of waves in various guiding structures —shielded and open metal-dielectric waveguides of arbitrary cross-section, planar and circular waveguides filled with inhomogeneous dielectrics, metamaterials, chiral media, anisotropic media and layered media with absorption. It also looks into spectral properties of wave propagation for the waveguide families being considered, and the relevant mathematical techniques such as spectral theory of non-self-adjoint operator-valued functions are described, including rigorous proofs of the existence of various types of waves. Further, numerical methods constructed on the basis of the presented mathematical approach and the results of numerical modeling for various structures are also described in depth. The book is beneficial to a broad spectrum of readers ranging from pure and applied mathematicians in electromagnetic field theory to researchers and engineers who are familiar with mathematics. Further, it is also useful as a supplementary text for upper-level undergraduate students interested in learning more advanced topics of mathematical methods in electromagnetics.

MOLIYAVIY MENEJMENT

O'zbekiston iqtisodiyotida amalga oshirilayotgan tub islohotlaming bugungi kundagi bosqichida raqamli iqtisodiyotni rivojlantirish masalasiga alohida e ’tibor qaratilmoqda. Aksiyadoriik jamiyatlarida moliyaviy menejment mexanizmini raqamli moliyaviy texnologiyalar asosida bosqichma-bosqich rivojlantirish bugungi xalqaro integratsiyalashuv jarayonlarini takomillashtirish, yirik aksiyadoriik jamiyatlarida davlatning ulushini kamaytirish asosida xorijiy investorlarga sotish kabi masalalarni hal qilishda alohida ahamiyat kasb etadi. Ta’kidlash lozimki, aksiyadoriik jamiyatlarida korporativ oshkoralikni ta’minlashda ularning kelgusida moliyaviy holati qay darajada ekanligi, bankrotlik ehtimolligi va moliyaviy risk darajasini prognoz qilish kabi korporativ baholash amaliyotini samarali yo‘lga qo‘yish orqali erishish mumkin.

Urban Cultures of Central Asia from the Bronze Age to the Karakhanids.

The present monograph on the urban cultures of Central Asia from the Bronze Age to the Karakhanid Middle Ages is the result of the international conference organised by the Society for the Exploration of EurAsia (Hergiswil, Switzerland) and the Institute of Archaeological Sciences (IAW) of the University of Bern (Switzerland) held from 4 to 6 February 2016 in Bern.

Telecommunication Breakdown. Concepts of Communication Transmitted via Software-Defined Radio (+ Matlab code)

This book helps readers build a complete digital radio that includes each part of a typical digital communication system. Chapter by chapter, the learner creates a Matlab realization of the various pieces of the system—exploring the key ideas along the way, and in the final chapter “puts it all together” to build a fully functional receiver. For communication systems builders.

Digital Communications with Emphasis on Data Modems: Theory, Analysis, Design, Simulation, Testing, and Applications

This book discusses the design, implementation and performance verification of waveforms and algorithms appropriate for digital data modulation and demodulation in modern communication systems. Using a building-block approach, the author provides an introductory to the advanced understanding of acquisition and data detection using source and executable simulation code to validate the communication system performance with respect to theory and design specifications. The author focuses on theoretical analysis, algorithm design, firmware and software designs and subsystem and system testing. This book treats system designs with a variety of channel characteristics from very low to optical frequencies. This book offers system analysis and subsystem implementation options for acquisition and data detection appropriate to the channel conditions and system specifications, and provides test methods for demonstrating system performance.

Oliy matematika

Ushbu darslik oliy o'quv yurtlarining tabiiy va muhandis-texnik sohalarining barcha ta'lim yo'nalishlarida oliy matematikani o'rganuvchi talabalar uchun mo'ljallab yozilgan. Darslikning ikkinchi qismida ko'p o'zgaruvchili funksiyalar, sonli qatorlar, funksional kyetma-kyetliklar va qatorlar, Furye qatori integrallari, karrali integrallar, egri chiziqli va sirt intyegrallari hamda maydonlar nazariyasi bo'blarini qamrab olgan. Darslik sodda, ayni paytda matematik qatiyat va izchillikda bayon qilingan bo'lib, amaliy mashg'ulot mavzulariga mos tipik misol va masalalar batafsil yechib ko'rsatilgan hamda mustaqil shlash uchun yetarli miqdorda misol va masalalar javoblari bilan eltirilgan.

Foundations for Radio Frequency Engineering

The book provides a comprehensive coverage of the fundamental topics in microwave engineering, antennas and wave propagation, and electromagnetic compatibility, including electromagnetic boundary value problems, waveguide theory, microwave resonators, antennas and wave propagation, microwave circuits, principles of electromagnetic compatibility designs, information theory and systems. Deals systematically with fundamental problems in radio frequency engineering, this important volume provides an updated treatment of radio frequency theory and techniques.The book can be used as a one-semester course for senior and first-year graduate students or as a reference for radio frequency engineers and applied physicists.