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1

Preorder Information Based Attributes’ Weights Learning in Multi-attribute Decision Making

Wang B., Liang J., Qian Y.

Fundamenta Informaticae

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2014

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Vol. 132, nr 3

331--347

EN

Choquet integral, as an adequate aggregation operator, extends the weighted mean operator by considering interactions among attributes. Choquet integral has been widely used in many real multi-attribute decision making. Weights (fuzzy measures) of attribute sets directly affect the decision results in multi-attribute decision making. In this paper, we aim to propose an objective method based on granular computing for determining the weights of the attribute sets. To address this issue, we first analyze the implied preorder relations under four evaluation forms and construct the corresponding preorder granular structures. Then, we define fuzzy measure of an attribute set by the similarity degree between a special preorder pairs. Finally, we employ two numerical examples for illustrating the feasibility and effectiveness of the proposed method. It is deserved to point out that the weight of each attribute subset can be learned from a given data set by the proposed method, not but be given subjectively by the decision maker. This idea provides a new perspective for multi-attribute decision making.

2

Application of AVO analysis to gas hydrates identification in the northern slope of the South China Sea

Yang R., Yan P., Wu N., Sha Z., Liang J.

Acta Geophysica

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2014

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Vol. 62, no. 4

802--817

EN

Amplitude versus offset (AVO) analysis is a conventional seismic exploration technique in geophysical and lithological interpretation and has been widely used in onshore and offshore exploration. Its use in marine gas hydrate research, however, is still in initial stages. In this study, AVO analysis is applied to seismic profiles at drilling sites where hydrate samples have been recovered. The AVO responses of free gas, bottom simulating reflector (BSRs), and gas hydrates are discussed, and the AVO attributes in relation to gas hydrates are summarized. The results show that changes in intercept, gradient, fluid factor and Poisson’s ratio clearly reflect: (i) location of free gas and the BSR, and (ii) spatial relations between blank zone, BSR, gas hydrate, and free gas.

3

Comprehensive Evaluation on Design Scheme of Cartesian Robot

Shen H., Liang J., Lan S.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 3b

254--257

EN

Indexes and factors that effect on the performance of Cartesian robot are analyzed. A comprehensive evaluation index system of Cartesian robot is constructed. Basic concepts and methods about grey theory and fuzzy mathematics theory are used to establish the grey fuzzy comprehensive evaluation model on the design scheme of Cartesian robot. The decision can be more scientific by weighting different factors through entropy weight method. A design scheme case is evaluated by using the presented model, results show that the model can reflect whole performance of different design scheme.

PL

W artykule przedstawiono analizę parametrów wpływających na pracę robota liniowego (ang. Cartesian Robot). W badaniach wykorzystano logikę rozmytą oraz teorię odcieni szarości w celu opracowania modelu w logice rozmytej, służący do ogólnej oceny projektu robota liniowego. Przy użyciu proponowanego modelu, analizie poddano przykładowy projekt robota, dzięki czemu uzyskano pełne odzwierciedlenie jego możliwości działania.

4

Analysis of Saussurea species from tibet using HPLC-DAD-ESI-MS n

Dawa Z, Zhou Y., Bai Y., Gesang S, Liang J., Ding L.

Acta Chromatographica

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2010

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Vol. 22, no. 1

141--152

EN

An HPLC-DAD-ESI-MS n method has been developed for simultaneous quantification of eight major compounds in eight Saussurea species which have long been used as the traditional Tibetan medicines. The method was validated for sensitivity, precision, and accuracy. LODs were from 0.11 to 5.01 μg mL -1, overall intra-day and inter-day variation was less than 2.70%, and overall recovery was over 98.0%. The correlation coefficients ( r 2) of the calibration plots were >0.991. This newly established method was successfully used to reveal difference among the chemical profiles and analytes contents of eight Saussurea species collected in Tibet. In addition, by comparison of UV and mass spectra with those of authentic compounds, a total of fifteen peaks were identified. It can be concluded that this is an effective method for quantification and evaluation of the flavonoids and coumarins in the eight species of the genus Saussurea . It can be used as an efficient reference method for development and use of the eight traditional Tibetan medicines by comparing their different characteristics.

5

Basic solution for three parallel non-symmetric permeable mode-Ill cracks in a functionally graded piezoelectric material plate

Liang J.

Archives of Mechanics

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2009

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Vol. 61, nr 2

137-165

EN

The behavior of three parallel permeable cracks with different lengths in a functionally graded piezoelectric material plane subjected to anti-plane shear stress loading was studied by the Schmidt method. The problem was formulated through the Fourier transform into three pairs of dual integral equations. To solve the dual integral equations, the jumps of displacements across the crack surfaces were directly expanded in a series of Jacobi polynomials. The results show that the stress and the electric displacement intensity factors at the crack tips depend on the lengths, spacing of the cracks and the material parameters. It is also revealed that the crack shielding effect is present in functionally graded piezoelectric materials.

6

Study on a diode-bridge type capacitance detection circuit for differential capacitive sensor

Matsuo T., Pawłat J., Liang J., Ueda T.

Przegląd Elektrotechniczny

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2007

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R. 83, nr 6

60-62

EN

Diode-bridge type capacitance detection circuit was developed in order to detect very small variation of differential capacitances in higher resolution. The circuit was designed for a comb structure tilt sensor, which was made of quartz crystal and had several movable electrodes between fixed electrodes. The circuit’s output was almost proportional to the displacement of the movable electrode. Presently, the resolution of 0.0015 degree was obtained using the combination of the sensor and the detection circuit. It corresponded to the resolution of about less than 4.5aF.

PL

W celu pomiaru bardzo malej różnicy pojemności z dużą dokładnością skonstruowano obwód elektryczny wykorzystujący mostek diodowy. Obwód został zaprojektowany dla miernika nachylenia kąta wykonanego z kryształu kwarcowego. Czujnik o strukturze grzebieniowej posiadał kilka ruchomych elektrod znajdujących się między elementami nieruchomymi. Sygnał wyjściowy obwodu był praktycznie proporcjonalny w stosunku do przesunięcia elektrod ruchomych. Obecnie osiągnięto dokładność miernika rzędu 0.0015 stopnia co odpowiada dokładności pomiaru pojemności rzędu 4.5 aF.