Chang S.-C.,Environmental Protection Administration |
Chang S.-C.,National Defense Medical Center |
Lin T.-H.,Transworld Institute of Technology |
Young C.-Y.,Chinese Culture University |
Lee C.-T.,National Central University
Environmental Monitoring and Assessment | Year: 2011
In this study, the concentrations of CO, non-methane hydrocarbons, NO X, SO 2, benzene, toluene, ethylbenzene, xylene (BTEX), PM 10, and PM 2.5 were continuously monitored before and after the fireworks display during the traditional Lantern Festival from March 2-7, 2007 in Yanshui Town, Taiwan. Major roads in Yanshui Town were surrounded by fireworks 13 km in length, with the display lasting for 45 min. More than 200 small firecracker towers popped up randomly in town, resulting in exceedingly inhomogeneous air quality until the end of display at 03:00 the next day, March 5. During the fireworks display, the hourly concentration of PM 10 and PM 2.5 at Yanshui Primary School reached about 429 and 250 μg m ∈-∈3, respectively, which is 10 times the normal level, and 6 s values even went as high as 1,046 and 842 μg m ∈-∈3, respectively. Similarly, BTEX concentration went up to about five to 10 times its normal value during the fireworks display. As indicated by the distribution of submicron particle sizes, the number of particles with a diameter less than 100 nm increased abruptly during the event period. Metal components with concentrations of more than 10 times higher than the normal value at Yanshui Primary School were Sr, K, Ba, Pb, Al, Mg, and Cu, in sequence. Among water-soluble ions, the content of K ∈+∈, Mg 2∈+∈, and Cl ∈-∈ increased the most, all of which were related to the materials used in the fireworks. The results of this study indicate that fireworks can cause an abrupt increase in the concentration of trace substances in the air within a short period. Although the risks of these trace substances on public health remain to be further assessed, the study results can be utilized in the management of folk events. © 2010 Springer Science+Business Media B.V.
Chen J.-I.-Z.,Da - Yeh University |
Kuo W.C.,Transworld Institute of Technology
Wireless Personal Communications | Year: 2012
On the basis of CFO (carrier frequency offset) point of view, the system performance results from the analysis by adopting the channel scenarios characterized as Weibull fading for anMC-DS-CDMA(multi-carrier direct-sequence coded-division multipleaccess) system is proposed in this article. Moreover, an approximate simple expression with the criterion of BER (bit error rate) versus SNR (signal-to-noise ratio) method is derived for an MC-DS-CDMA system combining with RAKE receiver, which is a special case of MRC (maximal ratio combining) diversity, based on theMGF (moment generating function) formula of Weibull statistics, and it associates with an alternative expression of Gaussian Q-function. In addition, the other point of view on the BER performance evaluation of an MC-DS-CDMA system is not only the assumption of both single-user and multi-user cases applied, but the phenomena of PBI (partial band interference) is also included. Furthermore, with several of the system parameters, such as CFO values, ?, Weibull fading parameter, ?, user number, K, spreading chip number, N, branch number, L, and the PBI values, JSR, etc., are compared with each other in the numerical results in order to validate the accuracy in the derived formulas. To the best of author's knowledge, it is a brain fresh idea proposed in this paper to evaluate the system performance for an MC-DS-CDMA system on the point of the CFO view over Weibull fading. © Springer Science+Business Media, LLC. 2010.
Chen C.-Y.,National Pingtung University |
Shyue S.-W.,National Sun Yat - sen University |
Chang C.-J.,Transworld Institute of Technology
International Journal of Innovative Computing, Information and Control | Year: 2010
Data mining is commonly used in a wide range of different fields. It is an important tool for analyzing information in research areas where there is a huge collection of data. The aim of this study is to determine the various patterns that characterize multi- dimensional marine environments. In particular, we wish to determine the association patterns, the characterize Taiwan's Dapeng Bay. The processes of association rule (AR) mining and decision tree (DT) analysis are the main methodologies used in this study. We also utilize Weka, a comprehensive suite of Java class libraries for implementing many machine learning algorithms and the Clementine 10.1 software package for data mining analysis. Applications constructed from the AR model and decision tree model can be applied in other scientific domains. This paper describes the data mining process for Dapeng Bay, which is located in the south of Taiwan. ICIC International © 2010 ISSN.
Liu M.-S.,Academia Sinica, Taiwan |
Li H.-C.,Academia Sinica, Taiwan |
Chang Y.-M.,Transworld Institute of Technology |
Wu M.-T.,Taiwan Agricultural Research Institute |
Chen L.F.O.,Academia Sinica, Taiwan
Plant Science | Year: 2011
Our previous study revealed a cytokinin-related retardation of post-harvest floret yellowing in transgenic broccoli (Brassica oleracea var. italica) that harbored the bacterial isopentenyltransferase (ipt) gene. We aimed to investigate the underlining mechanism of this delayed post-harvest senescence. We used 2D electrophoresis and liquid chromatography-electrospray ionization-mass spectrometry/mass spectrometry for a proteomics analysis of heads of ipt-transgenic and non-transgenic inbred lines of broccoli at harvest and after four days post-harvest storage. At harvest, we found an accumulation of stress-responsive proteins involved in maintenance of protein folding (putative protein disulfide isomerase, peptidyl-prolyl cis-trans isomerase and chaperonins), scavenging of reactive oxygen species (Mn superoxide dismutase), and stress protection [myrosinase-binding protein, jasmonate inducible protein, dynamin-like protein, NADH dehydrogenase (ubiquinone) Fe-S protein 1 and stress-inducible tetratricopeptide repeat-containing protein]. After four days' post-harvest storage of non-transgenic broccoli florets, the levels of proteins involved in protein folding and carbon fixation were decreased, which indicates cellular degradation and a change in metabolism toward senescence. In addition, staining for antioxidant enzyme activity of non-transgenic plants after post-harvest storage revealed a marked decrease in activity of Fe-superoxide dismutase and ascorbate peroxidase. Thus, the accumulation of stress-responsive proteins and antioxidant enzyme activity in ipt-transgenic broccoli are most likely associated with retardation of post-harvest senescence. © 2011 Elsevier Ireland Ltd.
Cheng J.-H.,National Yunlin University of Science and Technology |
Chen H.-P.,National Yunlin University of Science and Technology |
Lin Y.-M.,Transworld Institute of Technology
Expert Systems with Applications | Year: 2010
One of the major difficulties in investment strategy is to integrate supply chain with finance for controlling the marketing timing. The present study uses not only the different indexes in fundamental and technical analysis, but also the rough set theory and artificial neural networks inference system to construct three investment market timing classification models. This includes probabilistic neural network classification model, rough set classification model and hybrid classification model combining probabilistic neural network, rough sets and C4.5 decision tree. We use the forecasting accuracy and investment return to evaluate the efficacy of these three classification models. Empirical experimentation shown hybrid classification model help construct a better predictive power trading system in terms of stock market timing analysis. © 2009 Elsevier Ltd. All rights reserved.
Yuan S.Y.,Transworld Institute of Technology |
Li H.T.,Soochow University of Taiwan |
Huang H.W.,Soochow University of Taiwan |
Chang B.V.,Soochow University of Taiwan
Journal of Environmental Science and Health - Part B Pesticides, Food Contaminants, and Agricultural Wastes | Year: 2010
This study investigated the aerobic degradation of tetrachlorobisphenol-A (TCBPA) in sediment samples collected at three sites along Erren River in southern Taiwan. TCBPA biodegradation rate constants (k1) and half-lives (t1/2) ranged from 0.03 to 0.06 day-1 and 11.6 to 23.1 days, respectively. The biodegradation of TCBPA was enhanced by the addition of cellulose, yeast extract, sodium chloride, brij 30, brij 35, surfactin, and rhamnolipid. Of the micro-organism strains isolated from the sediment, we found that strains L1 and L5 (identified as Bacillus megaterium and Pseudomonas putida) expressed the best biodegrading ability. The inoculation of sediment with the TCBPA-degrading bacteria could enhance the efficiency of degradation. © Taylor & Francis Group, LLC.
Wang C.-Y.,National Chung Cheng University |
Wang C.-Y.,Transworld Institute of Technology |
Huang H.-Y.,National Chung Cheng University |
Hwang R.-H.,National Chung Cheng University
Personal and Ubiquitous Computing | Year: 2011
Ubiquitous computing is aiming at providing users with intelligent human-centric context-aware services at anytime anywhere. However, mobility increases dynamism and uncertainty conditions. This study therefore explores the management and uses of various contexts for automatically providing appropriate services to individual users. This issue is explored from an open framework perspective referred to as ubiquitous gate (U-gate). In this framework, a distributed context management architecture and a communication model based on standard protocols are proposed. To fit user requirements and to achieve complete mobility management, a context-aware path planning mechanism (UbiPaPaGo) and a context-aware handoff mechanism (UbiHandoff) are proposed based on context stored in an open and distributed context management server U-gate. Based on the path planning results of UbiPaPaGo, UbiHandoff derives a minimum access point (AP) handoff plan that satisfies multiple QoS requirements for individual users and services. The UbiHandoff mechanism includes multiple-attribute decision making method (MADM)-based handoff planning, referred to as MADM-based UbiHandoff, and genetic algorithm (GA)-based handoff planning, referred to as GA-based UbiHandoff. In the proposed MADMbased UbiHandoff, analytic hierarchy process (AHP) and technique for order preference by similarity to ideal solution (TOPSIS) provide efficient and seamless AP handoff to gain higher QoS performance. In GA-based UbiHandoff, genetic algorithm is employed to minimize handoff by finding appropriate APs along the path under QoS constraints. Finally, the effectiveness of the proposed mechanisms is evaluated through simulations. Numerical results demonstrate that both mechanisms minimize handoffs and ensure compliance with QoS requirements. © Springer-Verlag London Limited 2010.
Yang S.-F.,Transworld Institute of Technology
International Journal of Robust and Nonlinear Control | Year: 2011
This paper presents an efficient algorithm for the generation of QFT bounds for robust tracking specifications for plants with affinely dependent uncertainties. For a plant with m affinely dependent uncertainties, it is shown that whether a point in the Nichols chart lies in the QFT bound for a robust tracking specification at a given frequency can be easily tested by computing the maxima and minima of m2m-1 univariate functions corresponding to the edges of the parameter domain box. This test procedure is then utilized along with a pivoting procedure to trace out the boundary of the QFT bound with a prescribed accuracy or resolution. The developed algorithm has the advantages that (1) it is efficient in the sense that it requires less floating point operations than other existing algorithms in the literature; (2) it can avoid the unfavorable trade-off between the computational burden and the accuracy of the computed QFT bounds that has arisen in the application of many existing QFT-bound generation algorithms; (3) the maximum allowable error of the computed QFT bound can be prespecified; and (4) it can compute QFT bounds with multi-valued boundaries. Numerical examples are given to illustrate the proposed algorithm and its computational superiority. © 2010 John Wiley & Sons, Ltd.
Lin J.-C.,Transworld Institute of Technology
JP Journal of Heat and Mass Transfer | Year: 2010
In this study, performance analysis and ecological optimization for an Atkinson engine with constant-temperature reservoirs are conducted. The ecological objective function is defined as the power-output minus the loss rate of availability. The parameters that maximize the ecological objective function and make the performance optimum are investigated. The results show that a maximum ecological function (MEF) exists and the corresponding power-output at the MEF condition is slightly lower than the maximum power-output. With the increase of the number of transfer units of the hot-side heat exchanger NH (or the cold-side heat exchanger NL), the MEF and the power-output at the MEF condition increase. The thermal efficiency at the MEF condition is lower than the maximum thermal efficiency that can be obtained. For a fixed NH, the thermal efficiency at the MEF condition increases dramatically at lower NL, while it increases slightly at larger NL. In addition, the thermal efficiency at the MEF condition gets larger as NH becomes greater. When the sum of NH and NL is fixed, the variation of the thermal efficiency at the MEF condition for various NH/(NH + NL) ratio is not obvious.
Yang S.-F.,Transworld Institute of Technology
International Journal of Control | Year: 2010
This article presents an efficient algorithm for computing quantitative feedback theory (QFT) bounds for frequency-domain specifications from plant templates which are approximated by a finite number of points. To develop the algorithm, an efficient procedure is developed for testing, at a given frequency, whether or not a complex point lies in the QFT bound. This test procedure is then utilised along with a pivoting procedure to trace out, with a prescribed accuracy or resolution, the boundary of the QFT bound. The developed algorithm for computing QFT bounds has the advantages that it is efficient and can compute QFT bounds with multi-valued boundaries. A numerical example is given to show the computational superiority of the proposed algorithm. © 2010 Taylor & Francis.