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This study employed red and blue light-emitting diodes (LEDs) and cold cathode fluorescent lamps (CCFLs) to stimulate orchid seedlings and examine the influence of various light sources in mother stock flasks. Using the Taguchi method, we identified the optimal parameter combination to be photoperiod 12 hours, ON-period 30 %, CCFL 0 Lux, red LED 500 Lux, and blue LED 150 Lux. The results show that...
In this paper, the resonant spectrum of the piezoelectric ceramic thin disk with different diameter-to-thickness ratio in the frequency range from 50 kHz to 1 MHz was studied by the impedance analysis method. If the diameter-to-thickness ratio was higher than 15, the vibration mode of the piezoelectric ceramic thin disk was pure radial mode, besides the fundamental radial mode, there are some radial...
In this study, a 3-dimensional representation is employed to characterize electrical property of the cell growth status for PC12. This can extend Electrical Bioimpedance Spectroscopy (EBIS) to multi-electrode application associated with position for increasing the special frequency. Traditionally, 2-dimensional Cole-Cole plot lack for the message of special frequency, especially in multi-electrode...
Electrical bio-electrical impedance spectroscopy (EBIS) could be used to evaluation the electrical proprieties of tissues. In this study, we used the radiation enteropathy of rats as the model, measured their EBIS, and solved the electrical prosperities of the tissue by three-element model optimization. The results demonstrated that the solution is associated with the tissue injury score. This method...
This system uses the principle of therapeutic exercise in continuous passive motion (CPM) to establish an efficiency estimating system to supply scientific, quantified data as the basis of estimation in treatment. The proposed system can assist doctors in diagnosing and treating patients, decrease therapy duration, and enhance therapeutic efficiency. The proposed system combines an estimating system...
This paper proposes a new method based on fuzzy logic theory to adjust the pulse width of PWM (Pulse Width Modulation) control in digital redesign and to implement it by FPGA (Field Programmable Gate Array) chip. The GA (Genetic Algorithm) is utilized to adjust the parameters of fuzzy logical system such that output response of controlled hybrid system closely matches with that of analog system.
This paper proposes a new method based on gradient operator together with interval arithmetic operations to converter a continuous-time chaotic nonlinear system to an equivalent discrete-time uncertain model. The bounds of interval system matrices via the proposed method are able to tightly enclose the exact nonlinear system. Finally we take a nonlinear chaotic circuit to illustrative our method's...
The purpose of this study is to investigate a scheme for normal electrical loads. Whenever electricity is being used, but its voltage, current, power are not known, long-term use may cause an increase in temperature. This, in turn, can lead to an accident. Therefore, the proposed device controls the use of electrical appliances. If the system detects that the load is in danger of voltage or current...
To real-time monitor the cell viability an important task in cell culturing associated applications. The bioimpedance spectroscopy is one of the useful techniques for this study. In this paper, a culture dish with an electrode-array is designed for the bioimpedance based cellular characterization. The electrode-array containing 32 electrodes is firstly fabricated using the Micro-Electro-Mechanical-System...
In the development of new generation EIT systems, the design of a steady current generator with broad bandwidth is an important consideration. In this paper, the current generator is constructed by enhanced Howland circuit with high-speed operational amplifier. The electronic models of current generator built on Orcad?? PSpice 9.2 software are simulated to observe the output current stability at multi-frequencies...
In the development of new generation EIT systems, the design of a steady current generator with broad bandwidth is an important consideration. In this paper, the current generator is constructed by enhanced Rowland circuit with high-speed operational amplifier. The electronic models of current generator built on Oreadreg PSpice 9.2 software are simulated to observe the output current stability at...
In the development of new generation EIT systems, the design of a steady current generator with broad bandwidth is an important consideration. In this paper, the current generator is constructed by enhanced Rowland circuit with high-speed operational amplifier. The electronic models of current generator built on Oreadreg PSpice 9.2 software are simulated to observe the output current stability at...
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