A5013123102- Wind Turbine Control Systems
- Microgrid Control and Optimization
- Frequency Control in Power Systems
- Electric Motor Design and Analysis
- Wind Energy Research and Development
- Multilevel Inverters and Converters
- Urological Disorders and Treatments
- Sensorless Control of Electric Motors
- Advanced Battery Technologies Research
- Phase Equilibria and Thermodynamics
- Bone Tumor Diagnosis and Treatments
- Anorectal Disease Treatments and Outcomes
- Pulsed Power Technology Applications
- Cardiac tumors and thrombi
- Power System Optimization and Stability
- Silicon Carbide Semiconductor Technologies
- Sarcoma Diagnosis and Treatment
- Congenital Heart Disease Studies
- Maternal and fetal healthcare
- Grief, Bereavement, and Mental Health
- Pelvic floor disorders treatments
- Urinary and Genital Oncology Studies
- Moyamoya disease diagnosis and treatment
- HVDC Systems and Fault Protection
- Bladder and Urothelial Cancer Treatments
University of the Ryukyus
1988-2024
National Institute of Advanced Industrial Science and Technology
2008
University of the Ryukyus University Hospital
2005-2006
Kyushu Hospital
1991
Nagoya University
1989
Utilization of renewable energy are coming up from view points environmental conservation and depletion fossil fuel. However, the generated power energies is always fluctuating due to status. Energy storage system indispensable compensate these components. capacitor (ECaSS) connected an electric double-layer (EDLC) with power-electronics devices useful for compensation since one capable controlling both active reactive simultaneously. This paper proposes current-source ECaSS (CS-ECS), which...
A dead-time compensation strategy is presented for a permanent-magnet synchronous motor drive taking zero-current clamp and parasitic capacitance effects into account. To improve the performance of around zero-crossing point phase current, two strategies are proposed. One to correct failure in polarity reversal voltage (DTCV) caused by phenomenon. The other adjust amplitude DTCV deal with variation transition time due switching devices. Experimental results demonstrate that current ripple...
Utilisation of renewable energy is becoming increasingly important from the viewpoints environmental conservation and depletion fossil fuel. However, generating power always fluctuates owing to its status. Therefore, an energy-storage system indispensable compensate for these fluctuations. Superconducting magnetic storage (SMES) useful compensation fluctuating power, since it capable controlling both active reactive simultaneously quickly. Control systems control series parallel using SMES...
Effective utilization of renewable energies such as wind energy is expected instead fossil fuels. Wind not constant and windmill output proportional to the cube speed, which cause generated power turbine generators (WTGs) fluctuate. In order reduce fluctuating components, there a method control pitch angle blades windmill. this paper, leveling generator by using an adaptive proposed. A self-tuning regulator (STR) used control. The input determined minimum variance (MVC). It possible...
Effective utilization of renewable energies such as wind energy is expected instead the fossil fuel. Wind not constant and windmill output proportional to cube speed, which cause generated power turbine generators fluctuate. In order reduce fluctuating components, there a method control pitch angle blades windmill. We have proposed using minimum variance in previous work. However, it controlled for only rated speed region. This paper presents strategy based on average standard deviation...
Tension on the nylon loops in a Stamey endoscopic bladder neck suspension has been quantified for first time by using spring scale. Clinical data were compared between 14 patients with undetermined tension (control group) and 57 of either 400, 600, 700, 800 or 1,000 gm. Experimental study during operation demonstrated that changes posterior urethrovesical angle distance was elevated not proportional to tension: lower thread larger change these 2 parameters. Compared control group significant...
In recent year, the generating power from renewable energy sources is coming up. Particularly, wind turbine generator (WTGs) attractive because of its advantages such as, pollution free, no fuel cost, abundantly available in nature etc. However, generated and bus voltage always fluctuating it mainly depends on speed. A superconducting magnetic storage (SMES) unit capable controlling both active reactive simultaneously quickly. this paper, control systems for active/reactive simultaneous...
Utilization of renewable energy are coming up from view points environmental conservation and depletion fossil fuel. However, the generated power energies is always fluctuating due to status. Energy storage system indispensable compensate these components. capacitor (ECaSS) connected an electric double-layer (EDLC) with power-electronics devices useful for compensation since one capable controlling both active reactive simultaneously. This paper proposes current-source ECaSS (CS-ECS), which...
This paper presents a dead-time compensation strategy for permanent magnet synchronous motor drive taking zero current clamp and parasitic capacitor effects into account. A correction algorithm false detection of polarity due to is proposed. In addition, effect switching device investigated incorporated in strategy. Experimental results demonstrates the validity proposed method.
This paper has quantitatively investigated the operation frequency limitation of high voltage NPC 3-level converter with 4.5 kV Si-IEGT and 5 SiC-PiN diode hybrid pair. In order to investigate limitation, speed switching capability pair under a hard drive condition is evaluated, an exact power loss estimation method proposed estimate losses bipolar devices. The possibility in revealed by using method.
A technical qualification system was established by the Japanese Society of Endoscopic Surgery in 2004, and its effectiveness low anterior resection (LAR) has been reported. We herein performed a subgroup analysis participation technically qualified surgeons laparoscopy-assisted high (HAR), procedure used for surgeons.
On the basis of analytical solution Ornstein-Zernike equation in our previous paper, a model is presented for calculation fluid density profiles near curved walls. The result compared with computer-simulation data, and agreement reasonably good. An effect wall curvature cavity free energy are discussed.
This paper presents a new SVC control scheme using H/sub /spl infin// design, based on the linear matrix inequality (LMI) approach, which achieve voltage and damping of power oscillations simultaneously. The main feature LMI design is that selection weighting function more easier than Riccati approach. proposed controller available in real system, since model simulation detailed model. Also, simultaneous for single-machine infinite-bus system demonstrated through studies.
Myxoid liposarcoma (MLS), with its risk factors, tends to spread the lungs and extraperitoneally, intraperitoneal metastases occurring rarely. We present an unusual case of a myxoid that metastasized abdominal organs.A 60-year-old female patient was referred our hospital for evaluation right upper limb tumor had been growing 7 years. The refused surgery, during follow-up, hemorrhage resulted in hemorrhagic shock. patient's immediately amputated. MLS diagnosed histopathologically....