rct and asymmetrical silicon controlled rectifier ascr

... thay chuỗi xung Muốn vậy, xung điều khiển kết hợp với tín hiệu phát xung vuông qua mạch cổng logic AND trước đưa vào cổng B transistor Q1 (xem H1.22b) Mạch kích chứa phần tử photocoupler phototransistor...

Ngày tải lên: 13/12/2013, 11:15

... SCR (thyristor – silicon controlled rectifier) Nếu ta mắc nguồn điện chiều VAA vào SCR hình sau dòng điện nhỏ IG kích vào ... cực cổng G để SCR dẫn điện phải có dòng điện kích IG vào cực cổng 2/8 SCR (thyristor – silicon controlled rectifier) Ta thấy SCR coi tương đương với hai transistor PNP NPN liên kết qua ngõ thu ... nghịch (điện anod âm điện catod), có dòng điện rỉ nhỏ chạy qua SCR 3/8 SCR (thyristor – silicon controlled rectifier) - Khi SCR phân cực thuận (điện anod dương điện catod), ta nối tắt (hoặc để...

Ngày tải lên: 31/12/2015, 17:08

... crystalline silicon core and a thick amorphous silicon dioxide outer layer The diameters of the Si cores range from to nm, with the dominant diameter of nm These Si cores are very fine and uniform ... between the ultrafine silicon core and the sheathing silicon oxide layer [16] In summary, we have demonstrated that zeolite can be used as a template/precursor to grow very fine and uniform SiNWs ... of silicon nanoparticles (the nuclei of Si nanowires) surrounded by shells of silicon oxide In the channels of zeolites, the nucleation process was limited by the openings of the channels and...

Ngày tải lên: 16/03/2014, 15:09

Ngày tải lên: 21/03/2014, 21:56

... constructional and operation features of uncontrolled and controlled converters • Draw the waveforms and calculate their average and RMS values of different variables associated with a single phase fully controlled ... Lesson 10 Single Phase Fully Controlled Rectifier Version EE IIT, Kharagpur Operation and Analysis of single phase fully controlled converter Instructional Objectives On completion ... FFvo 10.2.2 Resistive-Inductive load Fig 10.2 (a) and (b) shows the circuit diagram and the waveforms of a single phase fully controlled halfwave rectifier supplying a resistive inductive load Although...

Ngày tải lên: 14/05/2014, 22:32

... MIL-101 BDC 29 and 34 12.0 and 14.7 64 MIL-101_NDC 2,6-NDC 39 and 46 13.5 and 18.2 114 MIL-100 BTC 25 and 29 4.8 and 8.6 26 Tb-mesoMOF TATB 39 and 47 13.0 and 17.0 115 UMCM-2 T2DC and BTB 26  ... to my family, especially my wife and my lovely daughter for their unconditional love and invaluable support I also thank my friends and acquaintances for great and impressive time during my stay ... CO2, and the surfactant, uniform MOF nanospheres with well-ordered mesopores and microporous walls were achieved The sizes of micropores, mesopores and the wall thickness were about 0.7, 3.0 and...

Ngày tải lên: 02/07/2014, 13:40

... AL) and used as purchased The restriction enzymes EcoRI and EcoRV were purchased from New England Biolabs (Ipswich, MA) Custom ssDNA sequences designated C1 (5’amino-ACGTACGTGATATCTGCATGCA-3’) and ... details Department of Biomedical Engineering, Vanderbilt University; Nashville, Tennessee, USA 2Vanderbilt Institute for Nanoscale Science and Engineering, Vanderbilt University; Nashville, Tennessee, ... Vanderbilt University; Nashville, Tennessee, USA Integrative Biosciences Institute, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland Authors’ contributions SSY and RLS planned and...

Ngày tải lên: 11/08/2014, 00:23

... Hubbell4 and Todd D Giorgio1,2* Affiliations: Department of Biomedical Engineering, Vanderbilt University; Nashville, Tennessee, USA Vanderbilt Institute for Nanoscale Science and Engineering, Vanderbilt ... Vanderbilt University; Nashville, Tennessee, USA Integrative Biosciences Institute, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland Email: SSY : shann.yu@vanderbilt.edu RLS: randy.l.scherer@vanderbilt.edu ... randy.l.scherer@vanderbilt.edu RAO: ryan.a.ortega@vanderbilt.edu CSB: charleson.bell@vanderbilt.edu CPO'N: conlin.oneil@epfl.ch JAH: jeffrey.hubbell@epfl.ch TDG: todd.d.giorgio@vanderbilt.edu *Corresponding...

Ngày tải lên: 11/08/2014, 08:20

... of the cells (88%) were flagellated and motile (Panel A) and strong signals corresponding to the unphosphorylated (lower band) and phosphorylated (upper band) forms of the RSP3-HA protein were ... CYC6:RSP3-HA and CAH1:RSP3-HA transformants, grown in the same conditions of Figures and 4, and probed with an anti-HA antibody Only transformants showing motility in the swimming assay (Figures and 4) ... Figure 6, and probed h and 48 h (CYC6 transformants) or h and h (CAH1 transformants) after induction The results (Panel C) show that the RSP3 protein is completely absent in non-induced, and readily...

Ngày tải lên: 11/08/2014, 11:21

... cổng, thay chuổi xung Muốn xung điều khiển kết hợp với tín hiệu phát xung vuông qua mạch cổng logic AND trước đưa vào cổng B transistor Q1 (xem hình II.11) +V cc G K B I E ÁN A ÙP X U N G +V cc G ... ( vài trăm đến vài ngàn ampe) Lúc đó, dòng kích vài ampe Darlistor tên thương mại , nhái theo trandidtor nối tầng Darlington transistor Một số nhà sản xuất dùng tên SCR hay Thyristor nhưnh thích...

Ngày tải lên: 16/11/2015, 00:30

... SCS (silicon – controlled switch) Ở ngõ vào thường người ta mắc miếng kim loại, sờ tay vào, SCS dẫn điện Led...

Ngày tải lên: 31/12/2015, 17:08

... applications, three-phase dual controlled rectifiers are widely used for controlling voltage value and direction conversion of high power DC motors; controlling and current direction conversion ... release electric arc and have low switching frequency The application of dual rectifiers will help to overcome the disadvantage as mentioned above In addition, the dual controlled rectifier with common ... controller, control circuit, load circuit and experimental results of three-phase dual controlled rectifier Keyword: Synchronous control, firing pulse, dual rectifier I MỞ ĐẦU 1.1 Tổng quan tình...

Ngày tải lên: 18/03/2016, 05:21

... situated at 99.2 and 102.4 eV are associated with the Si0 (Si-Si4) and Si3? (SiSiO3), respectively By contrast, two peaks situated at 102.1 and 103.5 eV are associated with Si3? (Si-SiO3) and Si4? (Si-O4), ... inner diameter and wall thickness of nanotubes were controlled, respectively, by baking the electrospun PVP nanofibers and by coating time without sacrificing the orientation degree and the length ... width and a suitable needle tip-to-target distance Moreover, the density of the nanofiber array depends on the electrospinning time Figure 3a and b show, respectively, low-magnification and high-...

Ngày tải lên: 22/06/2014, 00:20

... 3% and 0% discounting rates for both costs and health effects Results Lifetime costs and health effects Table presents the average (half) yearly costs and the EuroQoL-5 D score at discharge and ... categories 0-1, 2-3, and was 5.94, 5.16, 3.87 and 3.64 for men, and 6.91, 5.94, 4.92, and 4.51 for women Corresponding lifetime QALYs were estimated at 4.12, 3.00, 1.39, -.02 for men, and 4.80, 3.28, ... trial registration (ISRCTN67636203) This prospective non-randomized controlled cluster trial assessed the cost-effectiveness of three stroke service experiments between 1999 and 2000 compared to...

Ngày tải lên: 25/10/2012, 10:35

... efficacy of 5-Loxin® and Aflapin® in comparison with the placebo group in terms of improvement in pain and physical function scores at baseline and on days 7, 30, 60 and 90 of treatment and serum MMP-3 ... project and data analysis, and was primarily responsible for writing the manuscript KVA contributed to the design of the project, patient recruitment and management, and data collection ARS and AM ... demographics, medical history and nutritional status, at the baseline evaluation and during the follow-up evaluations on days 7, 30, 60 and 90 At the baseline evaluation, and at each visit during...

Ngày tải lên: 25/10/2012, 11:40

... etch rate and lower etched surface roughness by controlling temperature and agitation suitably In the TMAH solution of 20 % in weight, the optimized silicon etching condition in which the silicon ... etched surface quality in MEMS fabrications Results and discussion The Figs and show the results on the influence of temperature on etch rate and etched surface roughness The experimental conditions ... wall side (111) and bottom side (100) is unclear There are many pyramids on the bottom surface (100) At 70°C, the etch-rate is significantly higher and the intersection between (111 and (100) planes...

Ngày tải lên: 13/02/2014, 04:20

... loading and first strand synthesis with forward primer, 5¢-ATGTTTGAGACCTTCAACAC-3¢, and reverse primer, 5¢-CACGTCACACTTCATGAT GGA-3¢ then excised from PCR2.1 by digestion with HindIII and SalI and ... both Sp1 and Sp3 (10 ng, right panel) and assay of promoter activity of wild-type (pfgl2 ()1320/+9) and linker-scanning mutant and following cotransfection with 10 ng of pPacUSp1, pPacUSp3, and pPacUEts-1 ... regulating fgl2 expression and requires the presence of both Sp1 and Sp3 Collectively the linker-scanning and EMSA analysis suggest that Oct 1, Sp1/Sp3, Ets family members, and a Stat3-like protein...

Ngày tải lên: 20/02/2014, 11:20

... the Netherlands The SCP is expected to be an empowering and enabling device, by facilitating better understanding and self-care by the patient However, evidence concerning the positive and negative ... Veldhoven and Eindhoven, The Netherlands Department of Gynecology, Catharina Hospital, Eindhoven, The Netherlands Department of Gynecology, St Anna Hospital, Geldrop and Eindhoven, The Netherlands ... Dutch questionnaire Recruitment A pragmatic, cluster randomized controlled clinical trial (RCT) will be conducted, in which 12 hospitals will be randomized to either ‘usual care’ or ‘SCP care’ It...

Ngày tải lên: 05/03/2014, 15:20

... ATRP, NMP and RAFT, Volume 854: Advances in Controlled/ Living Radical Polymerization, Volume 944: Controlled/ Living Radical Polymerization: From Synthesis to Materials, Volume 1023: Controlled/ Living ... Polymerization: Progress in ATRP, and Volume 1024: Controlled/ Living Radical Polymerization: Progress in RAFT, DT, NMP and OMRP The Denver Meeting was very successful with 96 lectures and 83 posters presented ... 10.1021/bk-2012-1100.ch001 Controlled/ living radical polymerization (CRP) is among the most rapidly expanding areas of chemistry and polymer science (1–5) The advent of controlled radical polymerization...

Ngày tải lên: 14/03/2014, 09:20

... line, and in monkey Cos-7 cells, a kidney fibroblast cell line, under the influence of 4b-phorbol 12-myristate 13-acetate (PMA), forskolin and dioxin, or the heavy metals nickel, cobalt and copper ... of the promoterless luciferase gene and assayed For characterization of mRNA-related regulative capacity, 5¢- and 3¢-UTRs of TCTP mRNA were cloned upstream and downstream of the luciferase gene ... Figures and show TCTP mRNA and protein quantification data, demonstrating the way in which TCTP expression responded to the six selected substances It is evident that PMA, forskolin, dioxin, cobalt and...

Ngày tải lên: 16/03/2014, 05:20