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1
Content available remote M-estimation of the mixed-type generalized linear model
Dong Y., Song L., Wang M., Amin M.
Probability and Mathematical Statistics
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2018
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Vol. 38, Fasc. 1
209--223
EN
To investigate the features of the individual from the mixed-type model, a novel model, named the mixed-type generalized linear model, is proposed firstly in this work, which is verified to be realistic and useful. We consider the robustness of M-estimation to estimate the unknown parameters of the mixed-type generalized linear model. By applying the law of large numbers and the central limit theorem, the consistency and asymptotic normality of the M-estimation for the mixed-type generalized linear model are proved with regularity assumptions. At last, in order to evaluate the finite sample performance of the estimator for the new model, several applied instances are presented, which show the good performance of the estimator.
2
Content available Estimation of small uav position and attitude with reliable in-flight initial alignment for MEMS inertial sensors
Wang D., Dong Y., Li Q., Wu J., Wen Y.
Metrology and Measurement Systems
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2018
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Vol. 25, nr 3
603--616
EN
The advance of MEMS-based inertial sensors successfully expands their applications to small unmanned aerial vehicles (UAV), thus resulting in the challenge of reliable and accurate in-flight alignment for air-borne MEMS-based inertial navigation system (INS). In order to strengthen the rapid response capability for UAVs, this paper proposes a robust in-flight alignment scheme for airborne MEMS-INS aided by global navigation satellite system (GNSS). Aggravated by noisy MEMS sensors and complicated flight dynamics, a rotation-vector-based attitude determination method is devised to tackle the in-flight coarse alignment problem, and the technique of innovation-based robust Kalman filtering is used to handle the adverse impacts of measurement outliers in GNSS solutions. The results of flight test have indicated that the proposed alignment approach can accomplish accurate and reliable in-flight alignment in cases of measurement outliers, which has a significant performance improvement compared with its traditional counterparts.
3
Content available remote Effect of activated carbon on methomyl poisoning by urine metabolomics base on gas chromatography–mass spectrometry
Li L., Hu L., Chen B., Dong Y., Lin Z., Wang Z., Wen C., Wang X., Wang S.
Acta Chromatographica
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2018
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Vol. 30, no. 1
21--25
EN
In this study, we developed a urine metabolomic method by gas chromatography–mass spectrometry (GC–MS) combination with biomedical results to evaluate the effect of activated carbon on methomyl poisoning rats. The rats were divided into four groups, methomyl group, two activated carbon treatment group, and control group. According to the biochemical results, it indicated that activated carbon treated rats could cause liver and kidney function changes. According to the urine metabolomics results, activated carbon treatment group (10 min) and activated carbon treatment group (30 min) could be distinguished from methomyl group, and activated carbon treatment group (10 min) could be separated from activated carbon treatment group (30 min) rats, which indicated that the treatment of rats by activated carbon in different time had a different effect. The results indicate that metabolomic method by GC–MS may be useful to elucidate activated carbon treated on methomyl poisoning rats.
4
Content available remote Determination and pharmacokinetic study of jaceosidin in rat plasma by UPLC–MS/MS
Zhou Y., Chen B., Chen J., Dong Y., Wang S., Wen C., Wang X.
Acta Chromatographica
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2018
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Vol. 30, no. 2
131--135
EN
In this work, a sensitive and selective ultra-performance liquid chromatography–tandem mass spectrometry (UPLC–MS/MS) method was developed and fully validated for determination of jaceosidin in rat plasma. Avicularin was used as the internal standard (IS), and protein precipitation by acetonitrile was used to prepare samples. Chromatographic separation was achieved on a UPLC BEH C18 column (2.1 mm × 100 mm, 1.7 μm) with 0.1% formic acid and acetonitrile as the mobile phase with gradient elution. An electrospray ionization (ESI) source was applied and operated in positive ion mode; multiple reaction monitoring (MRM) mode was used for quantification. Calibration plots were linear throughout the range 2–500 ng Ml-1 for jaceosidin in rat plasma. Relative standard deviation (RSD) of intra-day and inter-day precision was less than 12%. The accuracy of the method was between 88.7% and 109.7%. Mean recoveries of jaceosidin in rat plasma ranged from 65.4% to 77.9%. The developed UPLC–MS/MS method was successfully applied to pharmacokinetic study of jaceosidin after intravenous administration of 2 mg kg-1 in rats. We could find that the jaceosidin rapidly eliminated, the t1/2 was 0.7 ± 0.3 h, and clearance (CL) was 22.4 ± 3.0 L h-1 kg-1.
5
Content available An analytical solution for dynamic response of water barrier subjected to strong shock waves caused by an underwater explosion to dams
Lu L., Zou D., Zhu Y., Dong Y., Zuo C., Wu Y.
Polish Maritime Research
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2017
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S 2
111--117
EN
Shock waves arriving at a dam site are close to plane waves when the center of an underwater explosion is far from the dam site. In general, the wave pressure is calculated with COLE empirical formula. The COLE formula is a negative exponential function with respect to time. In this paper, a new analytical solution algorithm is proposed, which does not require the use of step-by-step time integration. In Comparison with the step-by-step time integration, the proposed algorithm requires relatively less calculation and avoids high-frequency oscillation. Furthermore, the vertical upstream surface and the sloping upstream surface in two types of the dams are analyzed in this paper. The research results indicate that the analytical solution can be applied for a dam with a vertical upstream surface. However, because the upstream face of a dam is inclined, the analytical solution can be obtained only for dams that are at lower height. Whenever the height of a dam is higher, then no analytical solution can be obtained, and only the use of step-by-step time integration can obtain a solution.
6
Content available Focusing properties of partially coherent dark hollow Gaussian beams through a thin lens system
Dong Y., Zhao C., Wang K., Zhao C., Cai Y.
Optica Applicata
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2015
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Vol. 45, nr 2
151--161
EN
This paper investigated the focal shift of partially coherent dark hollow Gaussian beams through a thin lens system. An analytic expression of the irradiance distribution of the focusing partially coherent dark hollow Gaussian beams in the back focal plane has been given by using the Collins formula. The focus shift of focused partially coherent dark hollow Gaussian beams in different parameters is studied in detail by numerical calculations. It is found that the absolute value of the focal shift of partially coherent dark hollow Gaussian beams decreases as the transverse coherence width or the order of the dark hollow Gaussian beams or a parameter of the dark hollow Gaussian beams increases.
7
Content available remote A visualization system for oil spills IN Qinzhou Bay based on Google Earth
Dong Y., Hu B., Xie Z., Huang Y., Zhang S.
Journal of Power Technologies
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2014
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Vol. 94, nr 1
79--83
EN
This paper mainly aims to solve the visualization problem of oil spill. Combined with conditions on the ground of target research area Qinzhou Bay, important access to the sea for southwest China, the paper propose a model to construct the visualization system of oil spill, which relatively reveals as many as impact factors of oil spill and also is suitable for this region. The rich image resources of satellite remote sensing Google Earth is selected as the client during constructing the system. It combines Oracle which is suitable for storing large amounts of data as a backend database. This paper solves data exchange and data storage of KML between the Google Earth and Oracle by connecting them, which realizes the visualization of oil spill system in Qinzhou Bay.
8
Content available remote A New Intrusion Detection Model Based on Data Mining and Neural Network
Dong Y., Qi B., Zhu W., Gao W.
Przegląd Elektrotechniczny
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2013
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R. 89, nr 1b
88--90
EN
Today, we often apply the intrusion detection to aid the firewall to maintain the network security. But now network intrusion detection have problem of higher false alarm rate, we apply the data warehouse and the data mining in intrusion detection and the technology of network traffic monitoring and analysis. After network data is processed by data mining, we will get the certain data and the uncertain data. Then we process the data by the BP neural network, which based on the genetic algorithm, again. Finally, we propose a new model of intrusion detection based on the data warehouse, the data mining and the BP neural network. The experimental result indicates this model can find effectively many kinds behavior of network intrusion and have higher intelligence and environment accommodation.
PL
Obecnie, w celu utrzymania bezpieczeństwa sieci, stosuje się wykrywanie ataków przy pomocy zapory ogniowej, co często powoduje za wysoki poziom fałszywych ataków. W proponowanym rozwiązaniu proponuje się wykorzystanie magazynowania i pozyskiwania danych oraz analizę monitoringu ruchu sieci. Przetwarzanie danych polegało dotychczas na ustaleniu danych pewnych i niepewnych; obecnie proponujemy wykorzystanie genetycznego algorytmu sieci neuronowych BP. Ostatecznie, wprowadzono nowy model detekcji ataków bazujący na magazynowaniu i pozyskiwaniu danych oraz neuronowych sieciach BP. Badania eksperymentalne wykazują, że zaprezentowany model pozwala na znalezienie wielu rodzajów zachowań ataków sieci, jest bardziej inteligentny, zapewnia wyższy standard obsługi środowiska.
9
Content available The comparison of the effects of two approaches to control gully erosion in the Black Soil Region of China
Dong Y., Wu Y., Wang W.
Landform Analysis
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2011
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Vol. 17
43-46
EN
Gully erosion is an important form of soil erosion, however, little was done on the effect of gully erosion controlling approaches. A program for controlling gully erosion was carried out in Heshan Farm in black soil region of northeast China from 1994 to 1996 include two approaches: "Soil fill" and "Vegetation cover". From the investigation at 2009, Soil fill approach can protect the original place of gully erosion well, but this apporach ignores the whole impact at the catchment scale, and may cause to new gully appear. "Vegetation cover" approach is better to control gully erosion than "Soil fill" approach, but has little effect on controlling the headcut retreat.
10
Content available remote Kinetic determination of gibberellic acid applying the BZ oscillating chemical system
Dong Y.
Chemia Analityczna
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2006
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Vol. 51, No. 3
447-452
EN
A new analytical method for the determination of gibberellic acid (GA) has been proposed. It is based on the perturbation effect caused by different amounts of GA on the BZ chemical oscillating system: the Mn(II)-catalysed reaction between L-serine, potassium bromate. and malonic acid in acidic medium. The method utilises a linear relationship between the change in the oscillating period and GA concentration. Such a procedure has been used in this work for the first time. The obtained calibration curve was linear in GA concentration range 1.0 x 10 -8-1.0 10 -6 mol L-1,with the regression coefficient of 0.9998.
PL
Zaproponowano nowąanalitycznąmetodę oznaczania kwasu gibberellowego (GA). Metoda jest oparta na wpływie różnych zawartości GA na chemiczny system oscylacyjny BZ, w którym reakcja między L-seryną, bromianem potasu i kwasem malonowym, zachodząca w środowisku kwaśnym, jest katalizowana przez Mn(II). Opracowana metoda wykorzystuje liniową zależność między okresem oscylacji i stężeniem GA. Takie podejście zostało zastosowane po raz pierwszy w tej pracy. Krzywa kalibrowania była liniowa w zakresie stężeń 1.0 x 10 -8-1.0 10 -6 mol L-1 i miała współczynnik korelacji - 0,9998.
11
Content available remote Fast and sensitive spectrofluorimetric determination of trace amount of Pb(II) in sludge using o-vanilin-8-aminoquinoline
Tang B., Yue T., Wu J., Ding Y., Dong Y., Wang H.
Chemia Analityczna
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2005
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Vol. 50, No. 3
631-639
EN
o-Vanillin-8-am inoqu incline (OVAQ) — a novel fluorescent reagent has been synthesised and applied to the determination of Pb(II). In ethanol-water medium of pH 9.00 Pb(ll) reacted with OVAQ (&lambdaex/em= 278/318 nm) to form a 1; 1 non-fluorescent complex. Fluorescence quenching was proportional to the concentration of Pb(ll) in the range from 5.3 to 180 &mug L-1. Detection limit was 1.6 μg L-1. Interfering effect of 25 foreign ions on the determination results were studied. The method was successively applied to the determination of lead in sludge.
PL
Zsyntetyzowano nowy odczynnik fiuorymetryczny o-wanilino-8-aminochinolinę (OVAQ) 1 wyznaczono jego stale dysocjacji kwasowej. Zbadano reakcję fluorescencji odczynnika w obecności jonów oiowiu. W wodno-etanolowym roztworze o pH 9.0 Pb(II) reaguje 2 fluoryzującym (&lambdaex/em= 278/318 nm) odczynnikiem tworząc nie fluoryzujący kompleks o składzie 1:1. Wyznaczono liniowy zakres wykresu analitycznego od 5,3 do 180 μg -1 i granicę wykrywalności wynoszącą 1,6 μg L-1. Badano interferencje 25 jonów. Metoda jest prosta i została z powodzeniem zastosowana do oznaczania ołowiu w osadach.
12
Content available remote 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.
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