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The authors are developing e-textile measuring 12-lead ECG signal based using a historical brocade developing technique, NISHIJIN-ORI. In this paper, a NISHIJIN e-textile sensor belt prototype designed for ambulatory measurement (pre-hospital 12-lead ECG measurement) was tested on twenty volunteers. The recorded data was evaluated through the result of commercial automatic ECG analyzer. The obtained...
Recently, in vivo visualization of the cochlea and the smaller structures inside of it has been achieved by optical coherence tomography (OCT). This makes it possible to use OCT imaging for diagnosis of diseases such as Meniere's disease through measuring the degree of endolymphatic hydrops. To this end, we present a novel method for 3D segmentation of these cochlear OCT images that is based on superpixels...
This paper presents a new algorithm, which corrects gain unbalances of current sensors, applied in a conventional two-phase current detection for adjustable speed drive system of IPMSM. The gain unbalance of current sensors is corrected by utilizing the second harmonic components which is extracted by Discrete Fourier Transform (hereafter DFT) from q-axis voltage command. Besides, the correction process...
Offset error of a motor-current sensor varies during motor drive and increases torque ripple. To maintain torque at a high quality, on-line methods for compensating that offset error are required. Accordingly, two methods for compensating offset error by using the DC-voltage components included in phase-voltage commands are proposed and evaluated by experiments and simulation respectively. The evaluation...
Recently, Electric Vehicle (EV) is considered as one of important technologies of smart grid, however, there are some problems for spreading EVs. One of these problems is that charging the battery of an EV needs a longer time than refueling of gasoline vehicles. To overcome these problems, for example, some local governments in Japan started projects in which restaurants and shops rent outlets for...
For multi-hop wireless networks, we assign channels to communication between terminals. For this assignment problem, modeling using the edge coloring of the graph theory has been proposed. In the modeling, all edges of the graph are assigned colors. In this paper, we assign colors to edges in a subset of the edge set as the other modeling, and we consider the number of assigned colors in the graph...
This paper presents a method for reducing a motor torque ripple resulting from a motor phase current sensor offset error for motor drive applications such as a hybrid electric vehicle. The proposed method estimates the motor phase current sensor offset error on the basis of the direct voltage value included in the voltage source inverter output voltage reference value calculated by a discrete Fourier...
This paper presents a method for reducing a torque ripple resulting from a motor phase current sensor offset error for motor drive applications such as a hybrid electric vehicle. The proposed method compensates for the motor phase current sensor offset error by subtracting a motor phase current sensor offset error value estimated by using a discrete Fourier transform from a detected motor phase current...
This paper presents a reduction method for a torque ripple resulting from a motor phase current sensor offset error for motor drive applications such as a hybrid electric vehicle (HEV). The proposed method compensates for the detected motor phase current offset error by subtracting the detected motor phase current offset error value indirectly estimated using the inverter offset voltage reference...
Mammalian primary visual cortex (V1) contains a functional map of orientation preference. Within the orientation preference map, neurons aggregate in two different local patterns. Neurons with similar orientation preferences gather within orientation domains, whereas neurons with all different orientation preferences converge at the center of pinwheel-like arrangements of orientation domains. The...
During extracellular electrophysiological recording experiments, the waveform of neuronal spikes recorded from a single neuron often changes. These spike-waveform changes make single-neuron identification difficult, particularly when the activities of multiple neurons are simultaneously recorded with a multichannel microelectrode, such as a tetrode or a heptode. We have developed a tracking method...
In this paper, we explain the process of establishing shopper's activity-models based on a series of user-researches as the basis of pervasive systems for a supermarket. Pervasive systems have been recognized as the technologies which enable user's decision-aid in his/her everyday-activities. For instance, a smart travel navigation system, which employs embedded and wearable devices and mobile agent...
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