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1

Geophysical prediction technology based on Organic Carbon Content in source rocks of the Huizhou sag, the South China Sea

Yang W., Gong X., Peng F.

Polish Maritime Research

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2017

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S 2

4--13

EN

Due to the high exploration cost, limited number of wells for source rocks drilling and scarce test samples for the Total Organic Carbon Content (TOC) in the Huizhou sag, the TOC prediction of source rocks in this area and the assessment of resource potentials of the basin are faced with great challenges. In the study of TOC prediction, predecessors usually adopted the logging assessment method, since the data is only confined to a “point” and the regional prediction of the source bed in the seismic profile largely depends on the recognition of seismic facies, making it difficult to quantify TOC. In this study, we combined source rock geological characteristics, logging and seismic response and built the mathematical relation between quasi TOC curve and seismic data based on the TOC logging date of a single well and its internal seismic attribute. The result suggested that it was not purely a linear relationship that was adhered to by predecessors, but was shown as a complicated non-linear relationship. Therefore, the neural network algorithm and SVMs were introduced to obtain the optimum relationship between the quasi TOC curve and the seismic attribute. Then the goal of TOC prediction can be realized with the method of seismic inversion.

2

Deformation measurement of flexible birdlike airfoil with optical flow

Gong X., Bansmer S.

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

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2012

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Vol. 16, No 3-4

173--184

EN

The application of the Lucas-Kanade (LK) optical flow technique has seen a huge success in a wide variety of fields. The goal of this paper is to apply the Lucas-Kanade technique in measuring the deformation of flexible birdlike airfoil due to steady aerodynamic loads at transitional low Reynolds-numbers with a single pixel resolution. A pyramidal scheme is used to implement a coarse-to-fine warping strategy to allow large displacements. A nonlinear structure tensor is employed to diffuse local data anisotropically to preserve discontinuities in the optical flow field. Median filtering is introduced after each iteration to remove outliers. The upper surface of the airfoil is sprayed with stochastic ink dot pattern for easy capture by two cameras observed from two different angles above the airfoil to create a pattern on the airfoil for the deformation measurement. Finally, a general result of wind tunnel experiments is selected, two optical flow fields are calculated on two images generated from each camera respectively, and the optical flow results are compared with the image correlation results.

3

A Model of Formic Acid Pyrolysis in the Gas Phase Based on harmonic Mode Analysis

Shi Y., Zhou Z., Gong X., Zhou X.

Polish Journal of Chemistry

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2004

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Vol.78 /nr 11-12

2185-2195

EN

Mechanism of the thermal decomposition of formic acid in the gas-phase catalyzed by water or water dimer is proposed by vibrational mode analysis. The barrier heights for both dehydration and decarboxylation reactions are revealed to be significantly lower than previously reported values, implying the importance of the catalytic effect of H2O and (H2O)2 at the B3LYP/6-311G(d,p) level. The relationships of the intermediates, transition states and products are elucidated by the vibrational mode and vibrational frequencies. We used different methods to calculate the energy of all the species in order to further elucidate our calculations.

4

Kinetic determination of nicotinamide adenine dinucleotide phosphate (NADP) based on its inhibiting effect on the Belousov-Zhabotinski (BZ) oscillation system

Dong Y., Gai K., Gong X.

Chemia Analityczna

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2004

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Vol. 49, No. 5

739-748

EN

A new analytical method of the determination of nicotinamide adenine dinucleotide phosphate (NADP) based on its inhibiting effect on the BZ oscillation system has been proposed. BZ mechanism involves Mn(II)-catalyzed reaction between L-serine, potassium bromate and malonic acid in the acidic medium. Determination of NADP was based on the linear relationship between the change in the oscillating period and the concentration of NADP. Linearity of the calibration plot was observed within the range 1.0 × 10-8 - 1.0 × 10-6 mol L-1 NADP. Regression coefficient was 0.9998. Possible reaction pathway occurring between NADP and the components of the BZ oscillation system has been discussed.

PL

Zaproponowano nową metodę oznaczania fosforanu dinukleotydu nikotynamidoade-ninowego (NADP) opartą na efekcie hamowania jaki NADP wywiera na układ oscylacyjny Biełousowa-Żabotyńskiego (BZ). Mechanizm BZ polega na katalizowanej przez Mn(II) reakcji miQdzy L-seryną, bromianem potasu i kwasem malonowym w środowisku kwaśnym. Oznaczanie NADP jest oparte na liniowej zależności między zmianą okresu oscylacji a stężeniem NADP. Wykres kalibracyjny był liniowy w zakresie stężeń NADP: 1,0x10(-6) K-1,0 x 1O(-6) mol L(-1). Współczynnik regresji wynosił 0,9998. Przedyskutowano możliwe drogi reakcji zachodzących między NADP oraz składnikami układu oscylacyjnego BZ.

5

The inclusion complex of vitamin K3 bisulfite with B-cyclodextrin studied by means of OSWV and UV-visible spectroscopy

Gong X., Li H.

Polish Journal of Chemistry

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1999

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vol. 73 nr 3

501-508

EN

The reduction of Vitamin K3 bisulfite (VK3B) in the presence of b-cyclodextrin (b-CD) has been investigated by Osteryoung square wave voltammetry (OSWV) in phosphate buffer (pH=6.6). The results showed that b-CD form a 1:1 inclusion complex with VK3B. The dissociation constant was calculated from the plot of I2pc vs. (I2pc(VK3B)- I2pc)/[b-CD] to be Kd=3,5x10-3M. The diffusion coefficients of VK3B and the inclusion complex were obtained by chronocoulometry (CC) to be Df=1.5x10-6 cm2/s and Dc=0.7x10-6 cm2/s, respectively. UV-visible spectra gave further evidence of the complex formation and the dissociation constant obtained by spectroscopy, Kdi=5.0x10-3M, is in good agreement with that determined by electrochemistry.

6

Electrooxidation of Nicotinic Hydrazide Catalyzed by 2,2,6,6-Tetramethyl-4-hydroxypiperidine-1-oxyl and Its Analytical Application

Gong X., Li H.

Polish Journal of Chemistry

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1999

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Vol. 73, nr 11

1811-1817

EN

The electrochemical oxidation of nicotinic hydrazide (NH) catalyzed by 2,2,6,6-tetramethyl-4-hydroxypiperidine-1-oxyl (TMHPO) on a glassy carbon electrode has been studied. Addition of TMHPO reduces remarkably the overpotential necessary for the oxidation of NH at the GCE and the catalytic current is a affected by the concentration of the catalyst and the pH of the solution.