Fukuoka, Japan

Kyushu Sangyo University

Fukuoka, Japan

Kyushu Sangyo University was founded in 1960 in Fukuoka City, and currently has twenty departments and six graduate schools. It is a private university. Wikipedia.

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Murakami K.,Kyushu Sangyo University
Proceedings of IEEE Sensors | Year: 2017

Robot hand/arm systems attempt to insert pins into the sockets to form connectors, such as those in circuit boards. A tactile sensing method using a pin header and a pin socket as a connector is proposed for estimating the insertion state of the connector. The change of the amount of empty space of a pin socket due to the insertion of a pin header is measured by a vibration wave. The vibration wave is transmitted from one fingertip to another opposite fingertip through the grasped pin socket. The spectral intensity of this vibration wave is related to the change of the amount of empty space of the pin socket in the mating process. The insertion state is estimated by the spectral intensity. The frequency of the vibration wave is also calculated for this measurement. To realize this method, robotic fingertips were developed for transmitting the vibration wave. The fingertips perform both the tactile sensing and grasping function, so no additional sensing motion of the robot hand is needed. The measurement of the insertion state was successfully demonstrated in an experiment. © 2016 IEEE.

Honma S.,Kyushu Sangyo University | Hu J.-L.,National Chiao Tung University
Applied Energy | Year: 2014

Japan's energy security is more vulnerable today than it was before the Fukushima Daiichi nuclear power plant accident in March 2011. To alleviate its energy vulnerability, Japan has no choice but to improve energy efficiency. To aid in this improvement, this study compares Japan's energy efficiency at the industry level with that of other developed countries. We compute the total-factor energy efficiency (TFEE) of industries in 14 developed countries for 1995-2005 using data envelopment analysis. We use four inputs: labor, capital stock, energy, and non-energy intermediate inputs. Value added is the only relevant output. Results indicate that Japan can further optimize energy conservation because it experienced only a marginal decrease in the weighted TFEE, from 0.986 in 1995 to 0.927 in 2005. To improve inefficient industries, Japan should adapt energy conservation technologies from benchmark countries such as Germany, the United Kingdom, and the United States. © 2014 Elsevier Ltd.

Cheng K.,Kyushu Sangyo University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2017

In a temporal database, each data tuple is accompanied by a time interval during which its attribute values are valid. In this paper, we consider the null time intervals, that is, time intervals not intersected by any time intervals in the temporal database. We deal with the problem of computing temporal aggregates over null time intervals with length constraints. By interval folding, we transform the problem into aggregates over stabbing groups, maximal stabbing interval sets. We describe the detailed algorithms and report the experimental results. © 2017, Springer International Publishing AG.

Ishida K.,Kyushu Sangyo University
2017 IEEE International Conference on Computational Electromagnetics, ICCEM 2017 | Year: 2017

Global optimization using interval analysis is applied to a simple inverse scattering problem that estimates the dielectric constant and the radius of a circular cylinder from scattered waves. Numerical results show that the presented algorithm recovers the parameters as a group of the intervals which contain fairly close values to the true ones without including false ones (local minimum points). They imply that the algorithm has a possibility that can be applied to a more complex inverse scattering problem. © 2017 IEEE.

Cheng K.,Kyushu Sangyo University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

Temporal aggregation is an important query operation in temporal databases. Although the general forms of temporal aggregation have been well researched, some new applications such as online calendaring systems call for new temporal aggregation. In this paper, we study the issue of approximate temporal aggregation with nearby coalescing, which we call NSTA. NSTA improves instant temporal aggregation by coalescing nearby (not necessarily adjacent) intervals to produce more compact and concise aggregate results. We introduce the term of coalescibility and based on it we develop efficient algorithms to compute coalesced aggregates. We evaluate the proposed methods experimentally and verify the feasibility. © Springer International Publishing Switzerland 2016.

New fundamental equations of state explicit in the Helmholtz energy with a common functional form are presented for 2,3,3,3-tetrafluoropropene (R-1234yf) and trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)). The independent variables of the equations of state are the temperature and density. The equations of state are based on reliable experimental data for the vapor pressure, density, heat capacities, and speed of sound. The equation for R-1234yf covers temperatures between 240K and 400 K for pressures up to 40MPa with uncertainties of 0.1 % in liquid density, 0.3 % in vapor density, 2 % in liquid heat capacities, 0.05 % in the vapor-phase speed of sound, and 0.1% in vapor pressure. The equation for R-1234ze(E) is valid for temperatures from 240 K to 420 K and for pressures up to 15MPa with uncertainties of 0.1% in liquid density, 0.2 % in vapor density, 3 % in liquid heat capacities, 0.05% in the vapor-phase speed of sound, and 0.1% in vapor pressure. Both equations exhibit reasonable behavior in extrapolated regions outside the range of the experimental data. © Springer Science+Business Media, LLC 2011.

Yonemoto S.,Kyushu Sangyo University
Proceedings of the International Conference on Information Visualisation | Year: 2013

In this paper, we present a marker-less AR framework which enables virtual graffiti creation and reference image generation. Our framework also supports 3D annotations such as image textures (virtual graffiti), 3D objects and 3D text, which are superposed over the video stream. We adopt marker-less tracking technique based on key point based descriptors and the trackers. In general, reference image for marker-less AR must be acquired from real image in advance. In such situation, most marker-less tracking approaches force user to capture the front view of a target object. We suppose that reference image does not have to be captured under such condition. In experiments, we showed the estimation accuracy for reference image generation. And we demonstrated real-time marker-less tracking including reference image generation, easy-to-use virtual graffiti creation and immediate superimposing. © 2013 IEEE.

A new thermodynamic property model is presented for trans-1,3,3,3- tetrafluoropropene (trans-CHFCHCF3, HFO-1234ze(E)) based upon available experimental data. This model is an application of the extended corresponding states principle, which is one approach in property modeling for fluids with limited experimental databases. The model is capable of calculating with reasonable accuracies various properties of HFO-1234ze(E), including the PVT relation, energies, heat capacities, and vapor-liquid equilibrium. The reference fluid of the model is 1,1,1,2-tetrafluoroethane (HFC-134a). Comparisons of calculated values using the model are made with experimental data. Typical uncertainties of calculated properties are 0.2% in the vapor pressure, 0.5% in the liquid density, and 5% in the liquid and vapor isobaric heat capacities. In addition, an ancillary equation is given for the vapor pressure. Thermodynamic property diagrams generated using the model are also provided. © 2010 Elsevier Ltd and IIR. All rights reserved.

Thermodynamic property models explicit in the Helmholtz energy are presented for the R-32/1234ze(E) and R-32/1234yf mixtures. The Helmholtz energy of the mixtures are expressed as the sum of the ideal mixture contribution and the contribution from mixing. The independent variables are the temperature, molar volume, and composition. The most accurate pure-fluid equations of state are incorporated to calculate the ideal mixture contribution. The contribution from mixing is determined by fitting to available experimental data. The estimated uncertainties in calculated properties from the models are 1% for the bubble point pressure and 0.25% for liquid density. The critical loci of the mixtures are reasonably represented with the models. The calculated critical temperatures correspond to experimental values within ±0.8. K. © 2013 Elsevier B.V.

Cheng K.,Kyushu Sangyo University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

Distributed enterprise applications are typically based on a multiple-tier client-server architecture where large volume of data is transferred between tiers frequently. When the amount and frequency of data to be transferred become large, network bandwidth will become a bottleneck and efficient middle-tier data management is critical. In this paper, we propose a semi-persistence model to capture the evolving nature of data in a middle tier data management system. We also propose to use Bloom Filters (BF) as an efficient data structure to maintain the time-sensitive frequency profile of the underlying data items. We first extend the standard Bloom Filters by replacing the bit-vector with an array of counters. We then optimize it by allocating lowest space necessary for each counter to store its value. The preliminary experiments show that the optimized BF achieves considerable improvement on space usage while providing the same results of frequency profile. © 2010 Springer-Verlag Berlin Heidelberg.

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