334 research outputs found
Realization of a Temperature Based Automatic Controlled Domestic Electric Boiling System
This paper presents a kind of analog circuit based
temperature control system, which is mainly composed by threshold
control signal circuit, synchronization signal circuit and trigger
pulse circuit. Firstly, the temperature feedback signal function is
realized by temperature sensor TS503F3950E. Secondly, the main
control circuit forms the cycle controlled pulse signal to control
the thyristor switching model. Finally two reverse paralleled
thyristors regulate the output power by their switching state. In
the consequence, this is a modernized and energy-saving domestic
electric heating system
Measuring a Low-Earth-Orbit Satellite Network
Starlink and alike have attracted a lot of attention recently, however, the
inner working of these low-earth-orbit (LEO) satellite networks is still
largely unknown. This paper presents an ongoing measurement campaign focusing
on Starlink, including its satellite access networks, gateway and
point-of-presence structures, and backbone and Internet connections, revealing
insights applicable to other LEO satellite providers. It also highlights the
challenges and research opportunities of the integrated space-air-ground-aqua
network envisioned by 6G mobile communication systems, and calls for a
concerted community effort from practical and experimentation aspects
Transcriptome profiling of the floating-leaved aquatic plant Nymphoides peltata in response to flooding stress
This table provides all differentially expressed genes meeting the threshold (FDR ≤ 0.01) and the GO terms that the differentially expressed genes were enriched. (XLS 207 kb
Energy-Efficient Start-up Power Management for Batteryless Biomedical Implant Devices
This paper presents a solar energy harvesting
power management using the high-efficiency switched capacitor
DC-DC converter for biomedical implant
applications. By employing an on-chip start-up circuit with
parallel connected Photovoltaic (PV) cells, a small efficiency
improvement can be obtained when compared with the
traditional stacked photodiode methodology to boost the
harvested voltage while preserving a single-chip solution. The
PV cells have been optimised in the PC1D software and the
optimal parameters modelled in the Cadence environment. A
cross-coupled circuit with level shifter loop is also proposed to
improve the overall step up voltage output and hybrid converter
increases the start-up speed by 23.5%. The proposed system is
implemented in a standard 0.18-μm CMOS technology.
Simulation results show that the 4-phase start-up and cross coupled
with level-shifter can achieve a maximum efficiency of
60%
Energy-Efficient Start-up Power Management for Batteryless Biomedical Implant Devices
This paper presents a solar energy harvesting
power management using the high-efficiency switched capacitor
DC-DC converter for biomedical implant
applications. By employing an on-chip start-up circuit with
parallel connected Photovoltaic (PV) cells, a small efficiency
improvement can be obtained when compared with the
traditional stacked photodiode methodology to boost the
harvested voltage while preserving a single-chip solution. The
PV cells have been optimised in the PC1D software and the
optimal parameters modelled in the Cadence environment. A
cross-coupled circuit with level shifter loop is also proposed to
improve the overall step up voltage output and hybrid converter
increases the start-up speed by 23.5%. The proposed system is
implemented in a standard 0.18-μm CMOS technology.
Simulation results show that the 4-phase start-up and cross coupled
with level-shifter can achieve a maximum efficiency of
60%
Simulation of Photovoltaic Cells for Implantable Sensory Applications
Wireless biomedical implantable devices provide a variety of applications based on identification, health, and safety of mankind. Power harvesting and power generation methods through human tissues are still looming challenges because of low efficiency and energy instability. The minimum tissue loss at the optical transparency windows of 650 nm-1350 nm. Photovoltaic cells can be effectively used to provide the necessary power for these implantable devices. However, there have been no previous investigations into the optimum dimensions nor properties of these solar cells. In this case, we show an accurate multi-physics simulation of the performance of photovoltaic cells for implantable devices under the skin. A combination of semiconductor and optical simulations are developed in order to analyse the electro-optic behaviour of these cells. In addition, the efficiencies of 8.97 % and 0.26 % were evaluated under air and air-skin multilayer respectively
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