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1

H−/H∞ fault detection observer design for a polytopic LPV system using the relative degree

Zhou M., Rodrigues M., Shen Y., Theilliol D.

International Journal of Applied Mathematics and Computer Science

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2018

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Vol. 28, no. 1

83--95

EN

This paper proposes an H−/H∞ fault detection observer method by using generalized output for a class of polytopic linear parameter-varying (LPV) systems. As the main contribution, with the aid of the relative degree of output, a new output vector is generated by gathering the original output and its time derivative, and it is feasible to consider H− actuator fault sensitivity in the entire frequency for the new system. In order to improve actuator and sensor fault sensitivity as well as guarantee robustness against disturbances, simultaneously, an H−/H∞ fault detection observer is designed for the new LPV polytopic system. Besides, the design conditions of the proposed observer are transformed into an optimization problem by solving a set of linear matrix inequalities (LMIs). Numerical simulations are provided to illustrate the effectiveness of the proposed method.

2

Reduction Kinetics Behavior of FeO-CaO-SiO2-MgO-Al2O3 Molten Slag Using Solid-Carbon

Gao Q., Shen Y., Wei G., Shen F.

Archives of Metallurgy and Materials

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2018

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Vol. 63, iss. 1

257--263

EN

Reduction of FeO-bearing molten slag using solid-carbon, existing in primary slag of blast furnace (BF), consumes much BF energy. It is also a limit for BF efficiency. In this paper, reduction kinetics behavior of FeO-CaO-SiO2-MgO-Al2O3 molten slag (primary slag of BF) was investigated, and the restrictive step of the reaction was identified. It has been found that the reduction process of FeO-CaO-SiO2-MgO-Al2O3 BF slag using solid-carbon is a second-order reaction. And the reduction process is controlled by both diffusion of FeO and gasification reaction of carbon in molten slag. The apparent activation energy of reaction is 342.37 kJ/mol, the diffusion activation energy of FeO in molten slag is 355 kJ/mol, and the gasification reaction activation energy of carbon is 152.98 kJ/mol. Additionally, it is also concluded that reduction rate is influenced by temperature (T), mass fraction of FeO (w(FeO)), and basicity (R) of the slag. Moreover, a reduction model of this slag system was established and verified by a series of experiments.

3

Establishment of a rapid method to quantify eight flavonol glycosides for quality assessment of red toon using UPLC

Shen Y., Xu M., Deng P., Gu Q., Yin H., Xia G., Jia X., Yang H., Tam J.

Acta Chromatographica

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2018

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Vol. 30, no. 1

31--37

EN

Red Toon is a popular vegetable of favorable health benefits over Asia and Russia regions. In this study, isolation and identification of chemical constituents were performed to assess the quality of this functional food cultivated in various origins or harvested in different months. As a result, eight flavonol glycosides including rutin (I), myricitrin (II), quercetin-3-O-β-d-galactoranoside (III), quercetin-3-O-β-d-glucopyranose (IV), quercetin-3-O-α-l-arabinopyranoside (V), astragalin (VI), quercetin-3-O-α-l-rhamopyranoside (VII), and kaempferol-3-O-α-l-rhamopyranoside (VIII) were obtained. Among these, compounds III and V were isolated from Toona genus for the first time. Importantly, a rapid and convenient ultra-performance liquid chromatography (UPLC) method was developed to quantify the flavonol glycosides in Red Toon and validated for linearity, precision, stability, repeatability, and accuracy successively. In addition, it was found that total flavonoid glycosides (about 2.6%) in the food were kept at a higher level from April to June than other months of the year. Furthermore, their content in the Red Toon collected from ten different origins was also determined and compared, and the results suggested that the total flavonoid glycosides from Shandong Yantai were the highest, followed by Shandong Ximou, supporting a well-recognized viewpoint that Red Toon cultivated in Shandong Province, China, is considered genuine due to the best health benefits and flavor.

4

A positioning lockholes of container corner castings method based on image recognition

Shen Y., Mi W., Zhang Z.

Polish Maritime Research

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2017

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S 3

95--101

EN

This article proposes a method of locating and recognizing lockholes in shipping container corner castings. This method converts the original image of the containers captured by a camera into the HSV (Hue, Saturation, Value) color space. To reduce the influence of the surface color of the containers and lights from the environment on the locating and recognizing algorithm, most noisy points of the image are filtered by binarization and a morphology opening operation to make the features of the containers clearer in the image. Thus, the container body can be separated from the total image. Then, the position and size of the corner castings are defined through calculation based on the international standard of the shipping container size. Lastly, by using this method, we can locate the corner casting in the image by using the General Hough Transform fitting algorithm onto ellipses.

5

A Deep Q-Learning Network for ship stowage planning problem

Shen Y., Zhao N., Xia M., Du X.

Polish Maritime Research

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2017

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S 3

102--109

EN

Ship stowage plan is the management connection of quae crane scheduling and yard crane scheduling. The quality of ship stowage plan affects the productivity greatly. Previous studies mainly focuses on solving stowage planning problem with online searching algorithm, efficiency of which is significantly affected by case size. In this study, a Deep Q-Learning Network (DQN) is proposed to solve ship stowage planning problem. With DQN, massive calculation and training is done in pre-training stage, while in application stage stowage plan can be made in seconds. To formulate network input, decision factors are analyzed to compose feature vector of stowage plan. States subject to constraints, available action and reward function of Q-value are designed. With these information and design, an 8-layer DQN is formulated with an evaluation function of mean square error is composed to learn stowage planning. At the end of this study, several production cases are solved with proposed DQN to validate the effectiveness and generalization ability. Result shows a good availability of DQN to solve ship stowage planning problem.

6

Analysis of vibration transfer characteristics of vehicle suspension system employing inerter

Shen Y., Chen L., Liu Y., Zhang X.

Journal of Theoretical and Applied Mechanics

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2017

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Vol. 55 nr 4

1245--1256

EN

In this paper, the force transfer mechanism of three mechanical elements “inerter, spring and damper” is analyzed based on the “force-current” analogy theory. The vibration isolation performance of the two types of simple three-element vehicle suspensions S1 (inerter is in parallel with damper) and S2 (inerter is in series with damper) are studied. The dual-mass system model of the suspensions is built by means of using the mechanical impedance method. The influence of parameters variation on vibration transfer characteristics is also investigated.

7

Group-Bay stowage planning problem for container ship

Shen Y., Zhao N., Mi W.

Polish Maritime Research

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2016

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S 1

152--159

EN

Stowage planning is the core of ship planning. It directly influences the seaworthiness of container ship and the handling efficiency of container terminal. As the latter step of container ship stowage plan, terminal stowage planning optimizes terminal cost according to pre-plan. Group-Bay stowage planning is the smallest sub problem of terminal stowage planning problem. A group-bay stowage planning model is formulated to minimize relocation, crane movement and target weight gap satisfying both ship owner and container terminal. A GA-A* hybrid algorithm is designed to solve this problem. Numerical experiment shown the validity and the efficiency.

8

An anti-collision method of slip barrel for automatic ship loading in bulk terminal

Shen Y.

Polish Maritime Research

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2016

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S 1

144--151

EN

During the loading operation of a ship loader in bulk terminal, in order to bring bulk cargo, such as coal and ore, precisely into every corner of the cabin and not to raise dust at the same time, the slip barrel mechanism usually is placed fully inside the ship cabin near the cargo as close as possible. However, if too close, it will increase the risk of collision between slip barrel and cargo, which poses a security risk to loading operation. This article proposes an anti-collision method for slip barrel in the process of automatic ship loading in bulk terminal. This method can accurately position the cargo of cabin which is blocked by slip barrel and shovel, and provide a reliable guarantee for the automatic loading operation. Firstly, this method use an array of laser radar mounted on the maintenance platforms to perceive the collision objects around the slip barrel, including the cargo and cabin. Meanwhile, it provides a compensation algorithm to reduce the effect of anti-collision recognition brought by dust and various obstacles during the operation. According to the calculated effective distance between the cargo and slip barrel, the automatic control system of ship loading can adjust the loading operation on a real-time basis. In the end, this article analyze and illustrate the reliability and validity of this method by the case of the application in automatic ship loading system in Tianjin coal terminal.

9

Evolution properties of multi-Gaussian Schell model beams propagating in uniaxial crystal orthogonal to the optical axis

Lu X., Shen Y., Zhu X., Zhao C., Cai Y.

Optica Applicata

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2016

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Vol. 46, nr 1

19--34

EN

An analytical formula for the multi-Gaussian Schell model is derived for the beam propagating in a uniaxial crystal orthogonal to the optical axis. The propagation properties of multi-Gaussian Schell model beams in a uniaxial crystal orthogonal to the optical axis is investigated by using the analytical formula. Some results are illustrated by numerical examples related to the propagation properties of multi-Gaussian Schell model beams. It is found that the propagation properties of the multi-Gaussian Schell model beams are very different from the propagation properties in the free space. They are closely related to the initial coherence and the ratio of the extraordinary and ordinary refractive indices. The results provide a way for studying the propagation properties of the multi-Gaussian Schell model beams in the uniaxial crystal orthogonal to the optical axis.

10

Frequency Estimation Algorithms by Fusion Spectra of Multi-section Sinusoids

Xiao W., Tu Y., Liu L., Shen Y., Zhang L.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 3b

246--253

EN

For achieving a more precise frequency estimation of a short sinusoid at low SNR, a algorithm based on fusion spectra of Multi-section Sinusoids(M-sinusoids) was proposed. In order to solve the discontinuous phases problem of M-sinusoids, the Optimization Weighted-Accumulation (OW-A) spectrum was gained through weighted-accumulation spectra of M-sinusoids by the designed weighted factor. The correlation spectrum, which could inherit the narrow and high main-lobe of the OW-A spectrum, and the good noise immunity of the accumulation spectrum of M-sinusoids, was constructed by correlation OW-A spectrum and the accumulation spectrum. Therefore, higher precision frequency estimation could be obtained through spectral peak searching of the correlation spectrum. Moreover, in order to meet the high real-time demand in some fields, a fast algorithm of the proposed algorithm was put forward. This fast algorithm could reduce most computational cost of the proposed algorithm by the following techniques: design a fast DTFT algorithm, reduction dimensions of the weighted fusion spectrum matrix, 1/3 main-lodes correlation of the OW-A spectrum and the accumulation spectrum. Simulations demonstrate the superior performance of the proposed algorithms; the fast algorithm could reduce most calculation of the proposed algorithm with lowering a little frequency estimation precision, and it works better in very low SNR (SNR≤-13dB).

PL

W artykule zaproponowano algorytm estymacji częstotliwości krótkich fal sinusoidalnych o niskim zaszumieniu (SNR). Rozwiązanie bazuje na widmie fuzji M-częstotliowości sinusoid (M-sinusoids). W celu rozwiązania problemu nieciągłości faz M-sinusoid zastosowano współczynniki wagowe zawartości częstotliwości, co pozwoliło na ich optymalizację (ang. Optimization Weighted-Accumulation). Zastosowanie algorytmu pozwala na zwiększenie precyzji estymacji przy jednoczesnym zwiększeniu szybkości wykonania. Wyniki badań symulacyjnych potwierdzają skuteczność działania.

11

Blind separation of delayed sources based on second-order Taylor approximation

Li H., Shen Y., Wang J.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 1b

253--256

EN

Conventional linear instantaneous mixing model becomes unsuitable if propagation time delays are taken into account. A blind separation algorithm based on second-order Taylor approximation for delayed sources (SOTADS) is presented, under the constraint that time delays are small in comparison with the coherence time of each source. Simulation results validate that the proposed algorithm performs superior than related approaches even when the constraint is violated.

PL

Zaprezentowano algorytm ślepej separacji bazujący na aproksymacji Taylora drugiego rzędu dla źródeł z opóźnieniem SOTADS. Założono że czas opóźnienia jest mały w porównaniu z czasem koherencji obu źródeł.

12

A Multi-structure Elements Based Lane Recognition Algorithm

Shen Y., Dang J., Ren E., Lei T.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 4

206-210

EN

The existing traffic lane recognition algorithms have the weaknesses of low recognition ratio, bad robustness and real-time, for overcoming these drawbacks, this paper proposed an algorithm of lane recognition based on multi-structure elements model of morphological. In the algorithm, the region of interest (ROI) is extracted from the original image, which is detected by the operator of Canny. After that, the lanes are extracted by the structure elements, which have similar characteristics to that of lane model. Several lines are detected by Hough transformation, and choose the parameters to reconstruct the traffic lane. The experiment results show that this algorithm is simple, has better robustness, and at the same time, can efficiently detect the lane mask accurately and quickly.

PL

W artykule opisano metodę rozpoznawania linii na jezdni z poruszającego się pojazdu. Metoda bazuje na opracowaniu modelu morfologicznego multi-strukturalnego linii na podstawie danego obrazu oraz zastosowaniu transformaty Hough w celu wyznaczenia parametrów. Uzyskano w ten sposób zwiększenie szybkości w przypadku złożonego otoczenia, przy jednoczesnej niskim stopniu skomplikowania.

13

Isolation of gallic acid and methyl gallate from folium Toonea Sinensis and validated method for their quantitation using LC-based technologies

Shen Y., Yang H., Xia G., Wang J., Cai B., Jia X.

Acta Chromatographica

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2013

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Vol. 25, no. 4

687--701

EN

Silica-gel column chromatography and preparative reversed-phase high-performance liquid chromatography (RP-HPLC) were sequentially employed for the isolation of two antioxidants including gallic acid and methyl gallate from Folium Toonea Sinensis. An RP-HPLC-UV method was then developed and validated to rapidly determine their content in this herb with ethyl gallate as internal standard. The quantitation was performed on an XBridge Shield RP18 column (150 mm × 4.6 mm, 5 μm) under 40°C. The mobile phase consisting of acetonitrile and 0.1% formic acid aqueous solution was driven at 1.0 mL min -1 under gradient elution, and 270 nm was selected to monitor the separation. To evaluate the fitness for purpose of the method and to investigate the difference in the content of analytes among different samples, the leaves collected from five production sites were analyzed. The newly established method is suitable for routine analysis of gallic acid and methyl gallate in the herb and, hence, can assist in its quality assessment. It was also found that not only the content of two antioxidants but also the ratio varied significantly among different geographical origins. In addition, three samples from Yantai, Zumadian, and Zhenjiang were distinguished as they have a much higher content ratio than the other two.

14

Online Blind Separation of Dependent Sources Using Nonnegative Matrix Factorization Based on KL Divergence

Li H., Shen Y., Wang J.

Przegląd Elektrotechniczny

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2012

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R. 88, nr 1b

278-281

EN

This paper proposes a novel online algorithm for nonnegative matrix factorization (NMF) based on the generalized Kullback-Leibler (KL) divergence criterion, aimed to overcome the high computation problem of large-scale data brought about by conventional batch NMF algorithms. It features stable updating the factors alternately for each new-coming observation, and provides an efficient solution for the blind separation of statistically dependent sources (i.e., the sources are mutually correlated). Our theoretic analysis is validated by simulation examples.

PL

Przedstawiono nowy algorytm do faktoryzacji nieujemnej macierzy bazujący na kryterium Kullback-Leibler, pozwalający usprawnić problem obliczeń dużej ilości danych. Algorytm sukcesywnie zmienia współczynniki i pozwala na ślepą separację statystycznie zależnych źródeł.

15

HGRP: hybrid grid routing protocol for heterogeneous hierarchical wireless networks

Shen Y., Pei Q., Xu Q., Xi N., Ma J.

Control and Cybernetics

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2012

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Vol. 41, no. 2

353-371

EN

The heterogeneous mobile terminals coexist in the next generation wireless networks. The most common routing schemes for mobile ad hoc networks are designed for homogeneous wireless networks. The heterogeneous wireless network routing protocols are needed urgently in many important applications. This paper improves the routing scheme utilizing different capability of terminals and the Hybrid Grid Routing Protocol (HGRP) is proposed. The network is organized in the grid form, that is, the network deployment area is divided into square cells according to the location. Each cell contains one backbone node and several ordinary nodes. This proposed protocol consists of four parts: grid construction, local routing, global routing, and routing correction. Analysis and simulation results indicate that the proposed protocol has the advantages of lower routing cost, lower energy consumption, smaller delay and higher throughput, compared to AODV and ZRP.

16

A Iow complexity frequency domain pilot time domain doubly-average channel estimation for LOFDM systems

Gao M., Shen Y., Xu K

Przegląd Elektrotechniczny

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2011

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R. 87, nr 4

270-274

EN

In this work, a Iow complexity time domain channel estimation algorithm for LOFDM (Lattice Orthogonal Frequency Division Multiplexing) systems is proposed through doubly-average based on the equivalent time-frequency subspace projection and traditional frequency domain pilot time domain average (FPTA) algorithm with special pilot design. Furthermore, the interference problem is analyzed and the Cramer-Rao bound (CRB) of the time domain channel estimation for LOFDM systems is also deduced. Our theoretic analyses are confirmed by numerical results.

PL

Zaproponowano algorytm określania w dziedzinie czasu kanałów dla systemu LOFDM bazujący na projekcji czasowo-częstotliwościowej podprzestrzeni oraz systemu pilota FPTA. Przeanalizowano problem zakłóceń. Analizę teoretyczną potwierdziły rezultaty numeryczne.

17

Fluorimetric determination of iodate based on cyclodesulfurization of tiosemicarbazide with incorporated fluorescein

Shen Y., Yang X. F., Jin L.

Chemia Analityczna

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2008

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Vol. 53, No. 4

597-607

EN

A simple fluorimetric method for determination of iodate in table salt has been developed. The method is based on the reaction of iodate with excess iodide in acidic media which leads to the formation of iodine and subsequently to tri-iodide (I-3). I-3 induces cyclodesulfurization of non-fluorescent fluorescein-based thiosemicarbazide (FTC) and leads to the formation of the corresponding 1,3,4-oxadiazole, a colored and fluorescent product.During this process a spirocyclic ring of FTC is opened what causes the appearance of color and strong fluorescence emission. Based on this mechanism, a simple fluorimetric method for determination of iodate has been developed. Fluorescence increases linearly with iodate concentration in the range 20-800 nmol L-1. The detection limit was estimated as 6.0 nmol L-1 (3&sigma)). The proposed method has been applied to the determination of iodate in table salt with satisfactory results.

PL

Opracowano prostą metodę fluorymetrycznego oznaczania jodanów(V) w soli kuchennej. W metodzie wykorzystano reakcję jodanów z nadmiarem jodków w środowisku kwaśnym, w wyniku której powstaje (I-3).. Utworzony (I-3). powoduje przekształcenie niefluoryzującego związku fluoresceiny z tiosemikarbazydem (FTC) we fluoryzujący i kolorowy związek - 1,3,4-oksadiazol. Powstanie koloru i fluorescencj i jest spowodowane otwarciem jednego z pierścieni FTC. Stwierdzono, że fluorescencja wzrasta liniowo ze stężeniem jodanów w zakresie 20-800 nmol L-1-1 (3&sigma) . Opracowaną metodę z powodzeniem wykorzystano do oznaczaniajodanów w soli kuchennej.

18

Structure, Thermal Stability and Water Solubility of (Tanshinone II-A)/((beta-Cyclodextrin) Inclusions Complex

Yang Sh., Hu M., Shen Y., Ma X.

Polish Journal of Chemistry

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2004

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Vol. 78 / nr 1

53-61

EN

The structure of the inclusion complex of tanshinone II-A and _-cyclodextrin formed under microwave irradiation was studied by the UV, IR, and NMR spectroscopy. The association constant of the complex in water is 210 M-1, as determined from the double reciprocal curve by UV spectroscopy. The enhanced water solubility of the complex was found. Thermal studies proved the increased thermal stability of the inclusion complex.