low frequency meandering piezoelectric vibration energy harvester

... a compact, low- frequency, piezoelectric vibration energy harvesting device were presented. The meander- shaped piezoelectric energy harvester effectively achieves a lower resonant frequency compared ... design, fabrication, and characterization of a novel low- frequency meandering piezoelectric vibration energy harvester is presented. The energy harvester is...

Ngày tải lên: 06/05/2014, 08:54

... are often used to control of the gravimetric flow and dosing of particulate material. The realization of vibration with variable intensity and frequency in a wide range is achieved by means ... current control with a relatively high switching frequency, while the generation of triangular wave is based on the programmed current control at lower frequency. This second method has the...

Ngày tải lên: 03/01/2014, 19:15

... patterns, confirmed a lower ryanodine receptor expression in slow soleus muscle compared to fast fibers, and revealed a drastic reduction of the RyR1 isoform in chronic low- frequency stimulated ... and slow-twitching muscle fibers (Fig. 2F,G) and this is also reflected by the CSQ-POD overlay pattern of these two SR proteins (Fig. 2C). Calsequestrin complex formation in chronic low- frequenc...

Ngày tải lên: 08/03/2014, 10:20

... study investigators ULF ultra low frequency UV ultraviolet VDU visual display unit VHCC very high current configuration VLCC very low current configuration VLF very low frequency WBC white blood ... Group to check the proofs. Extremely Low Frequency Environmental Health Criteria This EHC addresses the possible health effects of exposure to extremely low frequency (>0 Hz –...

Ngày tải lên: 22/03/2014, 16:21

... 3-4. About This Report High-Impact, Low- Frequency Event Risk to the North American Bulk Power System June 2010 2 About the High-Impact, Low- Frequency (HILF) Event Risk Effort The ... should be given to both extreme events and long- duration, low- intensity storms. www.nerc.com | www.doe.gov June 2010 High-Impact, Low- Frequency Event Risk to the North Americ...

Ngày tải lên: 30/03/2014, 09:20

... www.medsci.org ©2004 Ivyspring International Publisher. All rights reserved Monte Carlo Commissioning of Low Energy Electron Radiotherapy Beams using NXEGS Software Research paper Received: 2004.3.02 ... 94305, USA A A b b s s t t r r a a c c t t This work is a report on the commissioning of low energy electron beams of a medical linear accelerator for Monte Carlo dose ca...

Ngày tải lên: 03/11/2012, 10:05

... control and low switching frequency, where saturation voltage is the main contributor to losses. The semiconductor requirements of this configuration have led to the development of a new low on-state ... these characteristics, a new low on-state voltage IGBT has been developed, as described in the next section. III. D EVELOPMENT OF NEW LOW ON - STATE IGBT S A new IGBT with low satur...

Ngày tải lên: 15/10/2013, 16:10

... bulk of the crystal oscillates at a resonance frequency in a thick- ness shear mode of vibration. Surface acoustic wave sensors are also based on the piezoelectric properties of quartz crystal. ... by piezoelectric biosensor. J Pharmaceut Biomed Anal 27 , 341–345. 20 Fung YS & Wong YY (2001) Self-assembled monolay- ers as the coating in a quartz piezoelectric crystal Detection o...

Ngày tải lên: 23/03/2014, 07:20

... voltage) and frequency – An up-and-down wave called an oscillating signal or a sine wave 24 Frequency (continued) 25 Frequency (continued) • A change in voltage does not create a change in frequency • The ... same frequency as the radio waves 28 Frequency (continued) 29 Analog Modulation • Representation of analog information by an analog signal • Analog modulation types – Ampli...

Ngày tải lên: 13/09/2012, 10:52

... Communications Low Rate Wireless Personal Area Networks 9 IEEE 802.15.1 and Bluetooth • Industry specification – Bluetooth Special Interest Group (SIG) • Defines small-form-factor, low- cost wireless ... (continued) – Bluetooth power usage (continued) • Power-saving modes – Active – Sniff – Hold – Park 16 Low Rate WPAN Security • Security should be of little concern with WPANs • One of...

Ngày tải lên: 13/09/2012, 10:52