Liu S.-S.,National Yunlin University of Science and Technology |
Wang C.-J.,Taiwan Research Institute
Automation in Construction | Year: 2012
Given the characteristics of linear construction projects, considerable research has been devoted to work productivity and continuity. However, most of these studies only consider single-skilled crews working on linear projects, neglecting the flexibility of multi-skilling in construction. Recently, researchers have revealed that multi-skilling in construction can lead to increased productivity, flexibility, and work continuity. Therefore, this study proposes a duration optimization model while introducing the concept of multi-skilling to integrate single/multiple-skilled crews to improve work performance. Moreover, to enhance the efficiency of problem solving, constraint programming (CP) is used to handle complicated combinatorial scheduling problems, and several heuristic rules involving schedules are engaged. The CP-based optimization minimizes project duration while two crew types, including single-skilled and multi-skilled crews, are integrated in the proposed model. A bridge example is used for several scenarios to illustrate the proposed model's handling of linear scheduling problems, demonstrating how multi-skilling can be used to optimize project duration and improve work continuity/efficiency in a construction context. © 2011 Elsevier B.V.
Lee P.-C.,Taiwan Research Institute |
Su H.-N.,National Chung Hsing University
Portland International Conference on Management of Engineering and Technology | Year: 2015
During the past decades, it has been gradually recognised that science, technology and innovation (STI) can provide solution to macro level science and technology (S&T) problems. To foster STI that enables socioeconomic growth, it is widely regarded as necessary means to build institutional capacity for optimising governance of STI. Therefore, many countries seek to integrate STI policies as part of their national development strategies. Science, technology and innovation policy has been increasingly designed and implemented at supra- and sub-national level. © 2014 Portland International Conference on Management of Engineering and Technology.
Tsai S.-J.,Taiwan Research Institute |
Huo C.-L.,National Dong Hwa University |
Yang Y.-K.,National Taiwan University of Science and Technology |
Sun T.-Y.,National Dong Hwa University
Applied Soft Computing Journal | Year: 2013
The main focus of this paper is to develop an optimization method for the automatic fighter tracking (AFT) problem. The AFT problem is similar to a general evader-pursuer maneuvering automation problem between the dynamic systems of two highly interactive objects. This paper proposes a particle swarm optimizer-based variable feedback gain controller (PSO-based VFGC) for dealing with AFT problems. The PSO-based VFGC is designed to obtain the control value of a pursuer through an error-feedback gain controller. Once conditions of system closed-loop stability have been satisfied, the optimal feedback gains can be obtained through PSO, and the actual control values can be derived from the obtained values. Simulation results confirm the capabilities of the proposed method by comparing the results against two other methods in the field: the weight matrix value defined Ricatti equation, and the linear matrix inequality (LMI) based linear quadratic regulator (LQR). The performance of the proposed method is superior to that of its alternatives. © 2012 Elsevier B.V.
Su E.-C.,National Chung Hsing University |
Huang B.-S.,Taiwan Research Institute |
Wey M.-Y.,National Chung Hsing University
Journal of Materials Science | Year: 2015
Solar light-responsive platinized N-doped TiO2/SrTiO3 that was thermally treated under H2 atmosphere (H–0.2Pt/N–TiO2/SrTiO3) exhibited high activity for hydrogen evolution under simulated sunlight irradiation. The hydrogen evolution rate of H–0.2Pt/N–TiO2/SrTiO3 was 2740 μmol/h/g, which was approximately 88 times higher than that of N–TiO2/SrTiO3. Results of X-ray photoelectron microscopy demonstrated that the thermal treatment atmosphere was the main factor that contributed to Pt(0) formation, and the proportion of Pt(0) increased in the following order of air < N2 < H2. Moreover, photoluminescence analysis showed that photogenerated charge separation efficiency was positively correlated with the degree of Pt(0) formation, as evidenced by the better photogenerated electron acceptance of Pt(0). The influences of Pt coating amount and photocatalyst concentration on hydrogen evolution efficiency were also investigated. The highest hydrogen evolution efficiency was attained when the Pt coating amount was 0.2 wt% and the photocatalyst concentration was controlled at 2.0 g/L. The stability and reusability experiments for hydrogen evolution and material characterization showed that the H–0.2Pt/N–TiO2/SrTiO3 with high physicochemical stability is a promising candidate material for practical application. © 2015 Springer Science+Business Media New York
Yoshitomi H.,Ehime University |
Lee C.-F.,Taiwan Research Institute
Entomological Science | Year: 2014
The genus KolibaciaLeschen and Lackner, 2013 is revised. Five species are recognized, one of which, K.okinawana sp. nov., is new to science. Two new combinations, K.tsushimana (Nakane) and K.regularis (Grouvelle), are proposed and K.regularis is newly recorded from Vietnam. © 2014 The Entomological Society of Japan.