It is known that the irreversibility field depends largely on the electric field criterion, Ec, for the determination of the critical current density. In addition, it was recently found that the vortex glass-liquid tr...
It is known that the irreversibility field depends largely on the electric field criterion, Ec, for the determination of the critical current density. In addition, it was recently found that the vortex glass-liquid transition field determined by the scaling of current-voltage curves also depended on the range of electric field in the measurement. In this paper the two characteristic fields are measured for a Bi-2223 silver-sheathed tape as a function of the electric field. The obtained result of the irreversibility field is compared with the theoretical result of the flux creep-flow model. Based on the agreement with the theoretical model a standard test method of the irreversibility field is proposed.
In the culture of marine chlorellas, it is necessary to count the number in order to understand the condition of increase. For that propose, counting by the naked eye using the microscope has been used. However, this ...
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In the culture of marine chlorellas, it is necessary to count the number in order to understand the condition of increase. For that propose, counting by the naked eye using the microscope has been used. However, this method requires a lot of time and work. We have developed the automatic chlorella counter using image processing and neural network. Its effectiveness is confirmed through the experiment.
Due to the complexity of the search space, the calculation of robot trajectories is a well suited field for evolutionary algorithms. Owing to the time-expensive calculation of the evolutionary algorithm and especially...
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Due to the complexity of the search space, the calculation of robot trajectories is a well suited field for evolutionary algorithms. Owing to the time-expensive calculation of the evolutionary algorithm and especially the collision-detection algorithm, the calculation of robot trajectories is mostly not in real time. Therefore, this paper presents an approach for shortening the calculation time by parallelising the whole algorithm. First, the problem to be solved is described. Here, the special coding of the robot trajectories is presented. Then the parallel algorithm and its realisation on a cluster is introduced. Finally, the performance comparisons are presented.
In a local area network (LAN), the availability of all network components is indispensable. To reach this goal it is necessary to secure a LAN against unwanted communication from outside. If there is an unauthorized a...
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In a local area network (LAN), the availability of all network components is indispensable. To reach this goal it is necessary to secure a LAN against unwanted communication from outside. If there is an unauthorized access which blocks the internal traffic, the security mechanism has to react and must exclude this traffic from the internal network.
Grading of durian is an important preprocess in durian production line. In this process, since destructive ways such as manual way, etc lose apart of pulp. processing time and quality, nondestructive way is required. ...
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Grading of durian is an important preprocess in durian production line. In this process, since destructive ways such as manual way, etc lose apart of pulp. processing time and quality, nondestructive way is required. This paper proposes an automatic ripeness grading of durian pulp by using color histograms and density. In this method, both color and density of durian pulp are utilized to classify the pulp ripeness. Since in case of ripe pulp, the color changes from white to yellow and density increase, we employ color obtained from video cameras. density from video cameras and weight measurement unit. Ripe pulp is graded by determining appropriate threshold values of color and density. In the experiments, we can classify the ripeness of durian pulp with 87.5% of accuracy
In this paper, we extend the 1-D real valued discrete Gabor transform (RDGT), proposed in our previous work, to the 2-D case for image representation and discuss how to apply the discrete Hartley transform (DHT) to co...
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ISBN:
(纸本)0780366859
In this paper, we extend the 1-D real valued discrete Gabor transform (RDGT), proposed in our previous work, to the 2-D case for image representation and discuss how to apply the discrete Hartley transform (DHT) to compute the 2-D RDGT coefficients of an image and to reconstruct the original image from the coefficients efficiently. Meanwhile, as in the 1-D case, the 2-D RDGT also bears a simple relationship with the complex valued discrete Gabor transform (CDGT) so that the 2-D CDGT coefficients can be directly obtained from the 2-D RDGT coefficients, Moreover, through experiments, we shall show that the 2-D RDGT coefficients have much more degree of information decorrelation than the 2-D CDGT coefficients because both the magnitudes and the phases of the complex coefficients need to be separately quantized.
A Robot vision system was designed using a silicon retina, which has been developed to mimick the parallel circuit structure of the vertebrate retina. The silicon retina used here is an analog CMOS very large-scale in...
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As steam generator (SG) tubes have aged, new and subtle degradations have appeared. Most of them start growing from outside the tubes. Since outer diameter defects might not be detected by conventional eddy current te...
As steam generator (SG) tubes have aged, new and subtle degradations have appeared. Most of them start growing from outside the tubes. Since outer diameter defects might not be detected by conventional eddy current testing due to skin effect phenomena, this paper studies the feasibility of using the remote field eddy current (RFEC) technique, which has shown equal sensitivity to inner diameter (ID) and outer diameter (OD) defects in ferromagnetic pipe inspection. Finite element modeling studies show that the operating frequency needs to be increased up to a few hundred kHz in order for RFEC effects to occur in the nonmagnetic SG tube. The proper distance between exciter and sensor coils is also found to be 1.5 OD, which is half of the distance used in ferromagnetic pipe inspection. The resulting defect signals show equal sensitivity to ID and OD defects. These results demonstrate superior capability of the proposed RFEC probe compared to the differential ECT probe in detecting OD defects.
＜正＞Microwave processing of materials is a relatively new technology advancement alternative that provides new approaches for enhancing material properties as well as economic advantages through energy savings and a...
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＜正＞Microwave processing of materials is a relatively new technology advancement alternative that provides new approaches for enhancing material properties as well as economic advantages through energy savings and accelerated product development. Factors that hinder the use of microwaves in materials processing are declining, so that prospect for the development of this technology seem to be very promising The two mechanisms of orientation polarisation and interfacial space charge polarisation, together with dc. conductivity, form the basis of high frequency heating. Clearly, advantages in utilising microwave technologies for processing materials include penetrating radiation, controlled
Geographic Information Systems (GISs) have become an essential tool for efficient handling of our natural and artificial environment. The most important activities in a GIS are querying and spatial analysis of georefe...
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