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1

Decision-theoretic Rough Sets-based Three-way Approximations of Interval-valued Fuzzy Sets

Lang G., Yang T.

Fundamenta Informaticae

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2015

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Vol. 142, nr 1-4

117--143

EN

In practical situations, interval-valued fuzzy sets are of interest because fuzzy sets of this kind are frequently encountered. In this paper, motivated by the needs for solving imprecise problems, we generalize the concept of shadowed sets for understanding interval-valued fuzzy sets and provide a solution to compute a pair of thresholds by searching for a balance of uncertainty. Then we present three-way approximations of interval-valued fuzzy sets and a formulation for calculating the pair of thresholds using single-valued loss functions. We also compute three-way approximations of interval-valued fuzzy sets using interval-valued loss functions. Afterwards, we employ several examples to illustrate that how to take an action for an object with an interval-valued membership grade using an interval-valued loss function.

2

Radon-thoron monitoring in tatun volcanic areas of northern Taiwan using LR-115 Alpha track detector technique: Pre-calibration and installation

Kumar A., Walia V., Yang T., Chang H., Lin S., Eappen K., Arora B

Acta Geophysica

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2013

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Vol. 61, no. 4

958-976

EN

In the present study, experiments have been carried out to calibrate LR-115 alpha detector films in bare and cup-mode exposure for the measurement of radon and thoron concentrations in soil gas. Results showed non-uniformity in track formation on the films in bare-mode exposure. However, in cup-mode exposure the non-uniformity was reduced to a greater extent. The calibration factors obtained for radon in bare- and cup-mode exposures are 0.049 and 0.034 tr. cm−2 per Bq m−3 d, respectively. An attempt has been made to calibrate the radon-thoron discriminative cup with LR-115 films for simultaneous measurements of radon and thoron. This paper also presents the preliminary results of radonthoron monitoring in Tatun volcanic areas of northern Taiwan for the first time using radon-thoron discriminators with LR-115 films. The results show that the safe temperature to install the LR-115 films in volcanic areas is ≤ 65°C and thoron concentration in the study area is low.

3

Small-signal circuit modeling for a semiconductor optical amplifier monolithically integrated with a sampled grating distributed Bragg reflector laser

Lv H., Li Z., Yang T., Huang C.

Optica Applicata

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2012

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Vol. 42, nr 1

55-68

EN

In this paper, a small-signal equivalent circuit model of a semiconductor optical amplifier (SOA) monolithically integrated with a sampled grating distributed Bragg reflector (SGDBR) laser is presented. To take into account the wavelength dependence of the circuit parameters of our model, the extraction of parameters has been performed by fitting the circuit model including parasitic effect with measured S-parameters of the integrated device for different operating wavelengths of the SGDBR laser. The optical frequency chirp caused by the current modulation of the SOA section has been simulated by the obtained small-signal circuit model.

4

Transition Metal Manganese(II), Nickel(II), Copper(II) and Zinc(II) Complexes of a New Schiff Base Ligand: Synthesis, Characterization and Antitumor Activity Studies

Yang T., Qin W.

Polish Journal of Chemistry

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2006

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Vol. 80, nr 10

1657-1662

EN

Four transition metals complexes ([Mn(L)2] (complex 1), [Ni(L)20.5H2O] (complex 2), [Cu(L)24H2O] (complex 3) and [Zn(L)20.5H2O] (complex 4)), which contain a new Schiff base ligand (HL) derived from 2,4-dihydroxylacetophenone with triaminotriethylamine, have been synthesized and subsequently characterized by element analysis, 1HNMRand mass spectra. Their properties have been investigated by IR, UV and TG-DTA techniques. Tentative structures for the complexes have been proposed based on the experimental results. The antitumor activity against HL-60 human leukemia cells of free ligand (L) and its Mn(II), Ni(II), Cu(II) complexes were also studied by MTT method. The Ni(II) complex shows the best antitumor activity properties among these complexes.

5

Synthesis and Fluorescence Spectra of Europium(III) and Terbium(III) Complexes with a New Bis-Schiff Base Ligand N,N'-Bis(2,4-di-hydroxyacetonephenone)-2,6-diaminopyridine (H4L)

Yang T., Xiao Z., Qin W., Liu W.

Polish Journal of Chemistry

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2004

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Vol. 78 / nr 4

601-605

6

Analysis of non-differentiable traffic networks

Yang T.

Archives of Transport

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2004

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Vol. 16, iss.1

87-98

EN

One ofthe major difficulties in dealing with dynamie traffie networks is to take aeeount of spatial and temporaI faetors. The inherent time-variant and stoehastie natures exaeerbate the diffieulties, beeause the traffie eondition is ehanging all the time. These eomplieate faetors may eause the non-differentiability phenomenon in dynamie traffie networks. This study reveals the undesirable property in dynamie networks and identifies the suffieient eonditions for traffie network non-differentiability phenomenon. The major faetors whieh may eause non-differentiability were investigated and the aggregate effeets of eomposite networks were also examined. Finally, some strategie s were suggested to overeome the undesirable properties based on the results.

PL

Jedną z głównych trudności w przypadku dynamicznych sieci ruchu jest rozważanie wpływu czynników przestrzennych i czasowych. Nieodłączny wariant czasowy oraz stochastyczna natura rzeczy wzmagają dodatkowo wspomniane trudności na skutek wciąż zmieniających się warunków ruchu. Te skomplikowane czynniki mogą spowodować zjawisko nieróżniczkowalności dynamicznych sieci ruchu. Niniejsze opracowanie wskazuje niepożądane właściwości występujące w dynamicznych sieciach ruchu oraz identyfikuje warunki dla zjawiska ich nieróżniczkowalności. Zbadano główne czynniki mogące powodować nieróżniczkowalność, jak również zagregowane efekty sieci złożonych. Na zakończenie, na podstawie uzyskanych wyników badań, przedstawiono sugestie strategii pomocnych w przezwyciężaniu wspomnianych trudności.

7

Theoretical aspects of a stable dynamic traffic assignment strategy

Peeta S., Yang T.

Archives of Transport

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2001

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Vol. 13, iss. 4

77-93

EN

This paper addresses the theoretical aspects of a dynamical systems based on stable dynamie traffic assignment (DT A) strategy for traffic networks equipped with advanced information systems. A non-linear dynamical system formulation is proposed. The solution existence is analyzed. The concept of time-dependent link performance functions is used to capture the time dependency of dynamie traffic networks. The assumptions on the link performance functions and their implications for the stable DT A strategy are discussed. Insights on the model behavior and system properties are illustrated using a two-link network. The Lyapunov-based theoretical stability analysis is related to the conceptual stability definitions.

PL

Artykuł przedstawia teoretyczne aspekty dynamicznych systemów opartych na stabilnej strategii dynamicznego przydziału ruchu dla sieci wyposażonych w zaawansowane systemy informatyczne. Przedstawiono nieliniowy opis sytemu dynamicznego i zbadano istnienie rozwiązania. Do określenia zależności czasowych dynamicznych sieci ruchu użyto funkcji zależnych od czasu wykonywania połączeń. Przedyskutowano założenia funkcji wykonywania połączeń i ich skutków dla stabilnej strategii dynamicznego przydziału ruchu. Zachowanie się modelu i własności systemu są ilustrowane siecią dwupołączeniową. Analizę stabilności przeprowadzono o metodę Lapunowa.