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Prognoz I Kompensatsiya Pomekh
ISBN: 9783659518232 / Rosyjski / Miękka / 92 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Monografiya posvyashchena voprosam prognozirovaniya i kompensatsii differentsiruemykh sluchaynykh protsessov. Modeli takogo roda protsessov shiroko ispol'zuyutsya v zadachakh svyazi, lokatsii, upravleniya tekhnicheskimi ob"ektami. V nachale monografii privedeny kratkie svedeniya, posvyashchennye opisaniyu takikh protsessov. Dalee rassmatrivayutsya algoritmy prognozirovaniya sluchaynykh protsessov i ikh effektivnost', privodyatsya rezul'taty chislennykh issledovaniy dlya sluchaynykh protsessov s rasprostranennymi koeffitsientami korrelyatsii. Ispol'zuetsya dva vida kompensatsii pomekh: putem...
Monografiya posvyashchena voprosam prognozirovaniya i kompensatsii differentsiruemykh sluchaynykh protsessov. Modeli takogo roda protsessov shiroko is...
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Metody Rascheta I Opredelenie Dopustimykh Znacheniy Napryazhennosti
ISBN: 9783659144677 / Rosyjski / Miękka / 100 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. V knige pokazany metody rascheta napryazhennosti magnitnogo polya promyshlennoy chastoty v okruzhayushchem prostranstve ot tokov odnofaznykh i trekhfaznykh chetyrekhzhil'nykh provodov i kabeley elektricheskoy seti. Vypolneny raschety po opredeleniyu kharaktera izmeneniy napryazhennosti magnitnogo polya v okruzhayushchem prostranstve ot tokov odnofaznykh i trekhfaznykh chetyrekhzhil'nykh provodov i kabeley s raspolozheniem zhil po kvadratu dlya simmetrichnykh, nepolnofaznykh rezhimov elektricheskoy seti i pri nesimmetrichnykh nagruzkakh v sistemakh elektrosnabzheniya. Polucheny analiticheskie...
V knige pokazany metody rascheta napryazhennosti magnitnogo polya promyshlennoy chastoty v okruzhayushchem prostranstve ot tokov odnofaznykh i trekhfa...
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Continuous Time Analog Design for Very Low Frequency Applications
ISBN: 9783659527623 / Angielski / Miękka / 128 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. For an Operational Transconductance Amplifier- Capacitor (OTA-C) integrated circuit implementation, this directly translates to a very small transconductance (of the order of a few nA/V) and a very large on-chip capacitance (of the order of several hundred pF). Both the above mentioned aspects of low frequency IC design are addressed in this work. Specifically, a family of OTA' s with very small transconductance has been designed using several design schemes such as current division, use of floating gate MOS and bulk driven transistors. A detailed comparison has been made among these schemes...
For an Operational Transconductance Amplifier- Capacitor (OTA-C) integrated circuit implementation, this directly translates to a very small transcond...
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Etude En Automatique
ISBN: 9783838140292 / Francuski / Miękka / 120 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Ce travail traite de la commande MPPT et optimisation d'un systeme photovoltaique pour un site isolA(c). Ainsi, nous avons proposA(c) un algorithme par logique floue permettant la poursuite du point de puissance maximal afin de remA(c)dier aux inconvA(c)nients des mA(c)thodes classiques. Ensuite, nous nous sommes intA(c)ressA(c)s A l'optimisation de la structure de l'installation. En effet, dans les installations classiques, dans le cas de dA(c)faillance d'un panneaux, tout le bloc sA(c)rie devient nutilisable, ce qui rA(c)duit considA(c)rablement les capacitA(c)s de production de...
Ce travail traite de la commande MPPT et optimisation d'un systeme photovoltaique pour un site isolA(c). Ainsi, nous avons proposA(c) un algorithme pa...
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Maskless Micro-fabrication Technique For Chemical/biological Sensors
ISBN: 9783659553912 / Angielski / Miękka / 124 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. A research dedicated to find and provide with simple and inexpensive practical ways for laboratories to fabricate polymer/silicon devices for various applications helping researchers do their research and build prototypes efficiently. This work shows an alternative to a complex photolithographic process only for research and prototype building purposes. The research shown in this book is not intended to prove an alternative technique for photolithography.
A research dedicated to find and provide with simple and inexpensive practical ways for laboratories to fabricate polymer/silicon devices for various ...
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A Novel ROM Design for High Speed Direct Digital Frequency Synthesizer
ISBN: 9783659566394 / Angielski / Miękka / 96 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Novel phase accumulator design based on fast adder families such as a modified Brent-Kung adder, carry look-ahead adder and kogge-Stone adder, combined with the pipelining technique to achieve high-frequency resolution and high-speed throughput have been explored and implemented. In 32-bit DDFS system, quarter wave symmetry technique is used to store only one quarter of the sine wave, whereas the ROM look-up table is partitioned into three 4-bit sub-ROMs based on angular decomposition technique and trigonometric identity. Exploiting the advantages of sine-cosine symmetrical attributes...
Novel phase accumulator design based on fast adder families such as a modified Brent-Kung adder, carry look-ahead adder and kogge-Stone adder, combine...
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Impact of the Dictionary Mismatch for CS-Based DOA Estimation
ISBN: 9783639676372 / Angielski / Miękka / 116 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The problem of direction finding has primal importance in modern life. Today, smart direction finding systems are used in various technical fields such as RADAR, SONAR, interference reduction, multi-user or multi-channel data transmission, environmental sounding, medical purposes and in many other areas of human life. Recent achievements in the field of signal processing provide a new paradigm known as Compressed Sensing (CS), where the advantages of sparse signal representation are utilized. The DOA model can be also formulated as sparse, i.e. with reduced measurement effort of the antenna....
The problem of direction finding has primal importance in modern life. Today, smart direction finding systems are used in various technical fields suc...
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Small Signal Amplifiers with JFETs & MOSFETs in Darlington's Topology
ISBN: 9783659627835 / Angielski / Miękka / 124 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Present book is an effort to develop, modify and analyze about 16 different small-signal amplifier circuits, mainly using JFETs and MOSFETs as one of the active components in Darlington pair or Triple Darlington topology. It enlightens a way to Electronics students to implement some new ideas during experimentation with Darlington's topology. Discussed amplifier circuits are simulated with circuit simulation software PSpice and thereafter small-signal AC equivalent analysis is carried out for every design. Proposed amplifiers with suggested biasing norms are found absolutely free from the...
Present book is an effort to develop, modify and analyze about 16 different small-signal amplifier circuits, mainly using JFETs and MOSFETs as one of ...
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Wireless channel models and beamforming antenna arrays
ISBN: 9783659614613 / Angielski / Miękka / 116 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Developing realistic channel models that can efficiently and accurately predict the performance of a wireless system is still a challenge facing communications engineers. It is important to stress here that the level of detail about the environment a channel model must provide is highly dependent on the type of system under consideration. This book introduces the fundamentals of radio-wave propagation and beamforming antenna arrays, with the primary applications to the field of terrestrial mobile communications including modeling aspects of the wireless communication channel and design...
Developing realistic channel models that can efficiently and accurately predict the performance of a wireless system is still a challenge facing commu...
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Polycrystalline wafers from powder Silicon for Solar cells
ISBN: 9783659639524 / Angielski / Miękka / 100 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The book is devoted the experimental analysis of a new way of obtaining of silicon wafers from the powder raw materials intended for use as a base material for solar cells. Before the powder technology of obtaining of silicon wafers has not been considered as an alternative way of obtaining of base wafers for solar cells and substrates for films. The polycrystalline silicon wafers obtained by a method of molding and forming from a powder and also photo-electric structures with the p-n-junction formed on their basis also electro-physical and photo-electrical characteristics of plates and...
The book is devoted the experimental analysis of a new way of obtaining of silicon wafers from the powder raw materials intended for use as a base mat...
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Magnitno-impul'snaya obrabotka (MIO) domennykh struktur
ISBN: 9783659632426 / Rosyjski / Miękka / 108 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Pod domennymi strukturami my ponimaem lyubye tvyerdye ili zhidkie veshchestva, soderzhashchie oblasti s razlichnymi fizicheskimi (elektrofizicheskimi) svoystvami. Predstavlennyy nami mekhanizm rekombinatsii neravnovesnykh nositeley zaryada v donorno-aktseptornykh parakh, raspolozhennykh na granitse domenov, podtverzhdaet identichnost' protsessov, proiskhodyashchikh v samykh raznykh veshchestvakh: monokristallakh sinteticheskogo almaza, zhidkom organicheskom toplive, dielektricheskikh plyenkakh, ferromagnetikakh. Obrabatyvaya domennye struktury sil'nymi magnitnymi i elektricheskimi polyami,...
Pod domennymi strukturami my ponimaem lyubye tvyerdye ili zhidkie veshchestva, soderzhashchie oblasti s razlichnymi fizicheskimi (elektrofizicheskimi)...
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Análise de um Canal Rádio Móvel Marítimo para uso em Telemedicina
ISBN: 9783639698022 / Portugalski / Miękka / 100 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. A Telerradiologia, uma das especialidades da Telemedicina, proporciona o transporte digital de imagens radiologicas do paciente ao profissional de saude. Os exames, constituidos de series de imagens, possuem geralmente um tamanho digital desproporcional as capacidades de trafego e qualidade das redes de telecomunicacoes disponiveis. Buscando uma solucao tecnologica capaz de transportar dados medicos em ambientes hostis para a comunicacao de dados, realizou-se um estudo de radiopropagacao em banda estreita em um ambiente maritimo, e em movimento, nas regioes proximas da Base Naval da Marinha...
A Telerradiologia, uma das especialidades da Telemedicina, proporciona o transporte digital de imagens radiologicas do paciente ao profissional de sau...
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Solare Energiebereitstellung in Ballungsgebieten
ISBN: 9783639728798 / Niemiecki / Miękka / 108 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Der Ausbau regenerativer Energieerzeugungsanlagen oder Energiewandler, speziell Dach-Photovoltaik-Anlagen dicht besiedelter Gebiete, welche am ortlichen Niederspannungs-Verteilnetz betrieben werden sollen, nimmt rasch zu. Durch die steigende Anzahl solcher PV-Generatoren treten Invertierungen der Lastflussrichtung an entsprechenden Ortsnetz-Transformatoren gehauft auf. Durch die stark fluktuierende Einspeisung kommt es temporar zu Beeintrachtigungen der Spannungsqualitat. Durch entsprechende Dachflachenmessung und PV-Simulation gilt es abzuschatzen, inwieweit mogliche Ausbaupotentiale...
Der Ausbau regenerativer Energieerzeugungsanlagen oder Energiewandler, speziell Dach-Photovoltaik-Anlagen dicht besiedelter Gebiete, welche am ortlich...
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Modeling of Land Mobile Satellite Radio Propagation Channel
ISBN: 9783659682568 / Angielski / Miękka / 96 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Buildings, trees, and terrain represent main local sources of propagation impairment in land mobile satellite (LMS) propagation. These elements interact with wave propagation through reflection, scattering and diffraction. Thus it is very important to characterize their effects on the radio channel. Accurate characterization is crucially needed to optimize system parameters such as power link budget, fading margin and hand-off algorithm. At mobile satellite frequencies roadside buildings can be assumed as conduction objects that significantly block the propagating signal. Even with existence...
Buildings, trees, and terrain represent main local sources of propagation impairment in land mobile satellite (LMS) propagation. These elements intera...
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Gestaltung eines Hochspannungsprüfplatzes bis 100kV
ISBN: 9783639493764 / Niemiecki / Miękka / 100 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Dieses Buch beschreibt den normgerechten Aufbau eines Hochspannungsprufstandes unter dem Aspekt der Teilentladungsmessung. Dabei wird sowohl der sicherheitstechnische Blickwinkel beleuchtet als auch die Umgebungsvoraussetzung fur eine von der Messmethode unabhangige moglichst ungestorte Teilentladungsmessung. Weiterhin werden eventuelle Ursachen fur geringfugigste Entladungen sowie deren Auswirkung auf das Messergebnis untersucht."
Dieses Buch beschreibt den normgerechten Aufbau eines Hochspannungsprufstandes unter dem Aspekt der Teilentladungsmessung. Dabei wird sowohl der siche...
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Determining Permissible Values of Magnetic Field Intensity
ISBN: 9783659452420 / Angielski / Miękka / 100 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. |
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Controle preditivo em atuadores empregando prognóstico de falhas
ISBN: 9783639757552 / Portugalski / Miękka / 100 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Idealmente, espera-se que uma planta permaneca em operacao ate a proxima manutencao programada. Para isso, o esforco de controle deve ser distribuido ao longo do tempo de forma que a degradacao do atuador nao cause sua avaria ou falha. Neste trabalho, assume-se que tal degradacao e relacionada com o esforco exercido acumulado ao longo do tempo, sendo avaliada por um indice convenientemente definido que associa o risco de avaria com um valor limiar. Propoe-se entao o uso de leis de controle preditivo para mitigar o desgaste do atuador, por meio da imposicao de restricoes relacionadas com a...
Idealmente, espera-se que uma planta permaneca em operacao ate a proxima manutencao programada. Para isso, o esforco de controle deve ser distribuido ...
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Grundlagen der Bestimmung von parasitären Induktivitäten
ISBN: 9783639809596 / Niemiecki / Miękka / 124 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Die moderne Leistungselektronik tritt in weitreichender Form in das alltägliche Leben. Viele Schaltungstopologien sind mittlerweile in jedem Haushalt zu finden. Die Tragweite reicht dabei vom einfachen Netzteil mit einer Leistung von weniger als 100 W bis zum elektrifizierten Fahrzeug mit einer Leistung von mehr als 100 kW. Trotz dieser Differenz, sind die Anforderungen in beiden Fällen ähnlich. Die Leistungselektronik muss sowohl perfomant als auch effizient und frei von schädlicher Störaussendung sein. Unter dem Gesichtspunkt kontinuierlich wachsender Leistungsdichten und...
Die moderne Leistungselektronik tritt in weitreichender Form in das alltägliche Leben. Viele Schaltungstopologien sind mittlerweile in jedem Haushalt...
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147,16 |
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Klasse D Audio-Leistungsverstärker
ISBN: 9783639807707 / Niemiecki / Miękka / 112 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Im Audiobereich haben in den letzten Jahren digitale Verstärker zunehmend an Bedeutung gewonnen. Dabei spielt vor allem die höhere Effizienz gegenüber klassischen Konzepten eine große Rolle. Weiterhin ist es möglich, die Verstärker mit deutlich kleineren Abmessungen zu realisieren. Trotz des anfänglich höheren Klirrfaktors älterer Ausführungen konnte durch zahlreiche Weiterentwicklungen eine Klangqualität erreicht werden, sodass klassische analoge Endstufen im Audiobereich nur noch eine untergeordnete Rolle spielen. Das vorliegende Buch hebt detailliert die Funktionsweise eines...
Im Audiobereich haben in den letzten Jahren digitale Verstärker zunehmend an Bedeutung gewonnen. Dabei spielt vor allem die höhere Effizienz gegenü...
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Controle PID e preditivo aspectos teóricos e de implementação prática
ISBN: 9783639698688 / Portugalski / Miękka / 104 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. A partir do surgimento de requisitos de desempenho cada vez mais rigidos, tecnicas que antigamente eram estudadas apenas em meio academico tem migrado para a industria, abrindo novos horizontes e estabelecendo novos conceitos. Com os Sistemas de Controle de Processos, em particular em seu mais baixo nivel de implementacao (chao de fabrica), tem se observado uma atualizacao constante. Dessa forma, aspectos de sintonia de controladores convencionais do tipo PID (Proporcional, Integral, Derivativo) e do tipo Preditivo baseado em modelos GPC (Generalized Predictive Control), ambos Multivariaveis...
A partir do surgimento de requisitos de desempenho cada vez mais rigidos, tecnicas que antigamente eram estudadas apenas em meio academico tem migrado...
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147,16 |
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