current mode hysteresis feedback pwm or psm mode
AN0823 analog design in a digital world using mixed signal controllers
... PIC16C781/782 FIGURE 15: VREF (CURRENT FEEDBACK NOT USED) VOLTAGE MODE HYSTERESIS FEEDBACK (PSM MODE ONLY) FOSC PSMC PRESCALER PSMC1A PULSE OUTPUT TO POWER SWITCH SC C1 - VOLTAGE FEEDBACK ++ Peripherals ... comparator C2 is held low and the PSMC is prevented from initiating the pulses DS00823A-page 28 2002 Microchip Technology Inc AN823 FIGURE 17: CURRENT MODE HYSTERESIS FEEDBACK (PWM OR PSM MODE) ... CONFIGURATION, CURRENT MODE, PWM Figure 22 shows an example of a boost configuration, Current mode, hysteresis feedback switching power supply using the PSMC The PSMC generates the control for Q1, providing...
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Tài liệu DUTY CYCLE pdf
... typical signals are: Pulse to 10 MHz Chirp or Phase coded pulse 0.1 to 10 MHz CW or PD 0.1 to kHz PRF is usually subdivided into the following categories: Low 0.25-4 kHz; Medium 8-40 kHz; High ... (dB) so it can be added to or subtracted from power measured in dBm/dBW rather than converting to, and using absolute units Duty cycle (dB) = 10 log(duty cycle ratio) [5] For the example of the 0.001 ... the definition of a square wave For Figure 1, the pulse width is unit of time and the period is 10 units In this case the duty cycle is: PW/T = 1/10 = 0.1 (10%) A more typical case would be a PRF...
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Báo cáo hóa học: " Research Article Trade-Offs between Energy Saving and Reliability in Low Duty Cycle Wireless Sensor Networks Using a Packet Splitting Forwarding Technique" docx
... of packets forwarded by a node is n p = Nm /NHsp for the SP forwarding algorithm, and nc = Nm NCRT /NHcrt for the proposed CRTbased forwarding algorithm (if we consider NCRT packets for each message), ... cluster-tree can be straightforwardly used for sending the CRT components Forwarding In this section, we report an example of the proposed forwarding algorithm Let us consider the network shown in Figure ... (and therefore the achievable energy reduction factor) is limited too Another similar work is [8], where the authors have proposed a protocol called ReInForM (Reliable Information Forwarding using...
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AN1473 various solutions for calculating a pulse and duty cycle
... EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE ... Copyright Act If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act Information contained in this publication ... Calculation for NCO AccumulatorVal Duty cycle = timerVal One important consideration is the timer rollover length The timer must not expire before the waveform makes a complete...
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cell cycle regulation - Ebook USA ( biotechnology)
... associates with origins in the G1 phase This complex includes the Origin Recognition Complex (ORC), which serves to recognize origins, the putative helicase MCM2-7, and other factors important for complex ... specific, conserved origins of replication exist Studies on origins in various systems support the early theory of a replicator sequence that marks the origin of replication, and an initiator protein ... important for one origin, whereas critical sequence elements are important for another In summary, Regulation of S Phase 35 origin selection in eukaryotes is defined by the proper environment for...
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Báo cáo y học: "NITRIC OXIDE (NO), CITRULLINE – NO CYCLE ENZYMES, GLUTAMINE SYNTHETASE AND OXIDATIVE STRESS IN ANOXIA (HYPOBARIC HYPOXIA) AND REPERFUSION IN RAT BRAIN"
... to anoxia as described for anoxia group once and after removal of animals from desiccator, they were allowed to stay at normal conditions and were given normal diet for days and decapitated and ... (35-36) Neuronal excitation involving the excitatory glutamate receptors is recognized as an important underlying mechanism in neurodegenerative disorders (37) In neurons, NO synthesis is stimulated ... L-arginine is transported into synaptosomes (46), neurons (47) and astroglia (48) by the y+ CAT system The CAT, a sodium-independent transporter, also functions as a carrier for L-ornithine in addition...
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Báo cáo y học: "BRCA1 May Modulate Neuronal Cell Cycle Re-Entry in Alzheimer Disease"
... combination or simply agent antimitotic therapy with vincristine, carmustine, melphalan, cyclophosphamide, or prednisone for AD [44] Acknowledgements Work in the authors’ laboratory is support by ... or, at minimum, the presence of oncogenic signaling in AD, providing another driving force, or “hit” specific for lesion development in AD [36] The presence of BRCA1 and other tumor suppressor ... insult or metabolic inefficiency Possibilities for other “hits” include genetic mutations in apolipoprotein E, presenilins, or amyloid-β protein precursor, hormonal dysregulation, environmental or...
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Báo cáo y học: "Cell Cycle Arrest by a Natural Product via G2/M Checkpoint"
... anti-tumor effect of CKBM was demonstrated in nude mice xenograft model with gastric cancer cells [10], in which CKBM showed a dosedependent inhibition of tumor growth with significant tumor volume ... incubated for 24, 48 or 72 hr Cells were trypsinized, harvested, and fixed in ml 80 % cold ethanol in test tubes and incubated at ℃ for 15 After incubation, cells were centrifuged at 1,500 rpm for and ... dose-dependent manner and the changes were more significant for p21 and 14-3-3σ (Fig 5) Protein concentration in each lane was normalized with actin before the comparisons amongst the proteins were...
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Báo cáo y học: "Study of the early steps of the Hepatitis B Virus life cycle"
... relevant receptor of HBV infection It is worthy that Hep-BP is a serine protease inhibitor and is over-expressed in the cancer cells [47] The over-expression of another serine protease inhibitor kazal ... protease inhibitor in the HBV infection will be discussed later Using human hepatoma cell line or the membrane of human liver cells, the protein that bind HBV MHBs or SHBs has been reported by several ... sialoglycoprotein was also reported as a receptor for SHBs binding in the uptake of HBV [49, 50] However, it is noted that no direct evidence to show that the interaction of HBV with those receptors could result...
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Six Sigma and the Product Development Cycle
... HEIDELBERG • LONDON • NEW YORK • OXFORD PARIS • SAN DIEGO • SAN FRANCISCO • SINGAPORE • SYDNEY • TOKYO Elsevier Butterworth-Heinemann Linacre House, Jordan Hill, Oxford OX2 8DP 30 Corporate Drive, Burlington, ... management or, as it is sometimes called, Six Sigma and the Product Development Cycle ‘Taylorism’ The idea was elegant Divide work into simple, short, repeatable units and have workers perform them for ... problems is more detailed information gathered This saves an enormous amount of effort It is worth bearing in mind that most continuous variables end up being reported as attributes, or at least...
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Global Strength Assessment Requirement of Ageing Fixed Offshore Structure with Joint Anomalies
... Partial load factor on non-environmental load = 1.0 FE = Partial load factor on environmental loads =1.0 FS = Partial material factor for structure = 1.0 FF = Partial material factor for foundation ... factor of 1.0 Environmental loads for the loading direction in question are subsequently incremented until the collapse of the platform 3.2 Environmental Load Modelling The wave and current forces ... forces for the non-linear collapse analysis are based on Morrison’s equation with account of hydrodynamic coefficients, wave kinematics factor, current blockage factor, using Stokes 5th order kinematic...
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fixed income performance attribution
... minor price errors can be caused by special corporate actions (principally for stocks) like splits, new issue rights, dividends in stocks, bond convertible issues A timing error of the corporate ... 30 was correct: the correlation between coefficients are pretty low except for issue spread and sector spread If we add the more important factors we obtain a multiple R-squared of more than ... very rigorous way A good performance attribution without an excellent performance measurement is nothing! Database maintenance is therefore the first obligatory step prior to any performance...
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INCREASING THE EFFECTIVENESS OF DUTY-FREE BUSINESS THROUGH DIVERSIFYING MARKETING STRATEGIES AT NOIBAI AIRPORT SERVICES JOIN-STOCK COMPANY
... product and give it more shelf space, and getting them to buy ahead For the sales force, objectives include getting more sales force support for current or new products or getting salespeople ... outlets that not apply local or national taxes and duties In other words, duty-free shops are shops selling goods which are exempted from export tax, import tax for import-export, transit They operate ... outlets that not apply local or national taxes and duties In other words, duty-free shops are shops selling goods which are exempted from export tax, import tax for import-export, transit 1.3.2 Kinds...
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Life cycle assessment of 50 kWp grid connected solar photovoltaic (SPV) system in India
... and accounts for about 4% of the world's total annual electricity generation India is also currently ranked sixth in annual electricity consumption, accounting for about 3.5% of the world's total ... manufacturing, assembly, transportation, installation and recycling of the PV modules and balance-of-system (BOS) such as invertors, charge regulators, supporting structures and accessories All these components ... assumed for the material production processes and process-specific emissions Moreover, a LCA is for study for each material should be a site specific study A life cycle energy analysis for 50 kWp...
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Thermodynamic analysis of gas – steam combined cycle with carbon dioxide (CO2) emissions saving
... air requirement with TIT 700 Spcific Work (kJ/kg of Air) 600 Compressor Specific Work Gas Turbine Specific Work Bottoming Cycle Specific Work Plant Specific Work CIT = 280 K CPR = 14 ABT = 1100 ... Varanasi, India Currently, she is working on mathematical modeling of gas – steam combined cycle for performance enhancement and carbon dioxide reduction as her M.Tech dissertation work She has obtained ... bled pressure for mixing in the deaerator The corresponding work is given by: w p1 = (m s − md / a , s )v f ( p d / a − pcond ) ηp where w p1 is the condensate extraction pump work (kJ/kg), v...
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Finite time exergoeconomic performance optimization for an irreversible universal steady flow variable-temperature heat reservoir heat pump cycle model
... load or heating load for heat engine, refrigerator or heat pump) per unit total cost, was put forward by Sahin and Kodal [37-41] It was used to analyze and optimize the performances of endoreversible ... the rate of heat-flow from the ' ' warm working-fluid to the heat-sink for the irreversible cycle model, while QH + QH is that for the endoreversible cycle model with the only loss of heat-resistance ... refrigerators and heat pumps [38, 40], and three-heat-reservoir absorption refrigerator and heat pump [41] Generalization and unified description of thermodynamic cycle model is an important task...
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Life cycle assessment (LCA) of an energy recovery plant in the olive oil industries
... and didactic papers and he worked in the sector of renewable energy and energy performance of buildings The themes of papers are: building comfort indoor, energetic performances of buildings and ... framework of a Life Cycle Impact (LCI) Assessment method is composed of mandatory elements (classification and characterisation) that convert LCI results into an indicator for each impact category, ... very important For instance, fossil-derived electricity can be assumed to be produced from oil, natural gas, coal or other sources, all of which have different GHG emission factors In order to...
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Utilization of activated carbon for the removal of basic dyes in fixed-bed microcolumn
... organic matter (DOM) According to the authors, parameters obtained by the calibration of fixed-bed adsorption models with microcolumn data could satisfactorily simulate the bed performance for ... procedure used for the design of an adsorber Two major design parameters, namely, the empty bed residence time (or empty bed contact time) and the adsorbent exhaustion rate (or adsorbent usage rate) ... assumption that the rate driving force obeys second-order reversible reaction kinetics; iii) a constant separation factor; iv) it is applicable to either favorable or unfavorable isotherms The main weakness...
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Intake manifold design effect on air fuel mixing and flow for an LPG heavy duty engine
... geometries model of manifolds In this paper the commonly available CFD tool FloWorks is applied FloWorks has the advantages of importing geometry directly from a CAD program such as SolidWorks (SW) ... performed for the engine speed correspond to the maximum torque (n=1500 rpm) and only the first cylinder in aspiration Two fluids are used, air and propane (we took a composition of LPG formed ... fuel mixture formation Acknowledgements This project was supported by Regional Transport Company of Sfax (SORETRAS), National School of Engineers of Sfax (ENIS), ANME and SAGAZ Authors would like...
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Android Activity Life Cycle
... phương thức onCreate( ) onDestroy( ) - Visible liftetime: Từ phương thức onStart( ) onStop( ) - Foreground lifetime: Từ phương thức onResume( ) onPause( ) Khi xây dựng Actitvity cho ứng dụng cần...
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