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Photonics and Optoelectronics, SOPO

作者： Jun Zhang Li Jiang Qian Yu Zhe Chen Key Laboratory of Disaster Forecast and Control in Engineering Ministry of Education of the Peoples Republic of China Jinan University Guangzhou China Key Laboratory of Disaster Forecast and Control in Engineering Ministry of Education of the People's Republic of China (Jinan University) Guangzhou China Key Laboratory of Optoelectronic Information and Sensing Technologies Guangdong Higher Educational Institutes (Jinan University) Guangzhou China

The purpose of this paper is to classify 93# and 97# gasoline by using principal component analysis (PCA) with self-organizing competitive neural network method and to establish near infrared transmission spectroscopy and reflectance spectroscopy qualitative identification model in 1100-1700nm spectral region. The spectral data is condensed by PCA method before modeling, and three principal components are chosen because their cumulative credibility has reached 97%. A three-layer self-organizing competitive neural network model is established based on the PCA method. Thirty-two wavelengths' absorbance is served as inputs of the self-organizing competitive neural network. The learning parameter is set as 0.01 and the training iteration is taken as 500. The conclusion is that it is feasible to apply near infrared transmission spectroscopy and reflectance spectroscopy qualitative identification model to discriminate the gasoline products as the PCA and self-organizing competitive neural networks method is used.

关键词： Petroleum Infrared spectra Spectroscopy Principal component analysis Artificial neural networks Neurons Neural networks Monitoring Reflectivity Calibration

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Redevelopment of liftoff rates of saltating sand grains based on a simple optimization model

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Science China Earth Sciences 2010年第4期53卷 568-574页

作者： CHENG Hong & ZOU XueYong State key laboratory of Earth Surface Processes and Resource Ecology,Beijing Normal University,Beijing 100875,China MOE engineering Center of Desertification and Blown-sand control,Beijing Normal University,Beijing 100875,China key laboratory of Environmental Change and Natural disaster of the Ministry of Education of China,Beijing Normal University,Beijing 100875,China 1. State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Beijing 100875 China2. MOE Engineering Center of Desertification and Blown-sand Control Beijing Normal University Beijing 100875 China3. Key Laboratory of Environmental Change and Natural Disaster of the Ministry of Education of China Beijing Normal University Beijing 100875 China

This paper is a redevelopment result of liftoff rates of saltating sand grains based on our previous *** sand flow is a complex multi-phase flow because of a special two-phase gas-solid flow near ground *** extensive research on the movement of blowing sand,no model fully characterizes aeolian sand flow,and large differences often exist between simulations of aeolian sand movement and field *** key problem is a few of sufficient research on liftoff rates of saltating sand grains(also called the number of liftoff sand grains per unit time and per unit bed area).It is necessary to re-search in advance liftoff rates of saltating sand *** redeveloped liftoff rates of saltating sand grains by establishing an optimization model based on the flux of aeolian sand flow at different heights of the sampler in wind tunnel and the simulated capture of saltating sand grains by different heights of the sampler that are from different liftoff position(distance from the sampler) in order to revise previous inversion condition of liftoff rates of saltating sand *** rates increased rapidly with increasing wind *** frictional wind velocities of u=0.67,0.77,0.82,0.83,and 0.87 m s-1,liftoff rates were 3840,954502,5235114,5499407,and 7696291 sand grain s-1 m-2,*** rates could be expressed as the square of the instantaneous frictional wind velocity and a constant(0.663) that differs from the critical(threshold) frictional wind velocity at which saltation *** our results require additional experimental validation and the simple optimization model must be improved,they nonetheless provide a strong basis for future research.

关键词： liftoff rates of saltating sand grains optimization model wind tunnel two-phase gas-solid flow

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Research on standard database of hidden dangers information in coal mine

Research on standard database of hidden dangers information ...

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2010 International Conference on E-Product E-Service and E-Entertainment, ICEEE2010

作者： Li, Xingdong Wang, Ruifang Li, Anbang Key Laboratory of Mine Disaster Prevention and Control Shandong University of Science and Technology Qingdao China College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao China

ISBN: (纸本)9781424471614

Accident is originated by hidden danger. Discovering and removing hidden dangers is one main approach to prevent and control accidents. This paper collected and analyzed the information of hidden dangers from multiple coal mines. On that basis, we put forward concepts of hidden danger information and standard database of hidden danger information, introduced the structure and build flow chart of standard database of hidden danger information and provided detailed account of collection, classification, numbering, price, person liable and reform measure of hidden dangers. Finally, in practice, it was indicated that standard database of hidden danger information is instrumental to solve the problem including identification, classification, establishing file and statistical analysis of hidden dangers. ©2010 IEEE.

关键词： Coal mines

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Role of SPS in chloride ions and PEG additive system for copper electrocrystallisation

Role of SPS in chloride ions and PEG additive system for cop...

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作者： Gu, M. Li, Q. Fu, B.-H. Xian, X.-H. Key Laboratory for the Exploitation of Southwestern Resources Chongqing University Environmental Disaster Control Engineering of Education Ministry Chongqing 400044 China College of Chemistry and Chemical Engineering Chongqing University Chongqing 400044 China

Cyclic voltammetry and chronoamperometry techniques were employed in the study of copper electrocrystallisation process on a glassy carbon electrode from acid sulphate electrolytes in the presence of bis(sodiumsulfopropyl) (SPS) and polyethylene glycol and Cl- ions (PEG-Cl--SPS). The role of SPS in the effect of PEG-Cl--SPS was investigated. It was found that SPS can weaken the strong suppression of PEG-Cl- for copper electrocrystallisation. This weakening was proportional to the SPS concentration. The increase in SPS concentration also resulted in the promotion of the nuclei number density. The nucleation mechanism depended on not only SPS concentration but also the potential applied in the presence of PEG-Cl --SPS. In the presence of PEG-Cl--SPS, instantaneous nucleation followed by three-dimensional growth (3DI) occurred at negative electrodeposition potentials, as in an additive free bath. However, progressive nucleation followed by three-dimensional growth (3DP) was found at less negative potentials. © 2010 Institute of Metal Finishing.

关键词： Electrodeposition

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Numerical simulation and model test study of stability of surrounding rock for deep tunnel

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Yantu Lixue/Rock and Soil Mechanics 2011年第SUPPL.2期32卷 615-620页

作者： Chen, Hao Ren, Wei-Zhong Li, Dan Xia, Bin-Wei State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China College of Urban Construction Wuhan University of Science and Technology Wuhan 430065 China China Educ. Min. Key Lab. for Exploitation of Southwest Resources and Environ. Disaster Control Eng. Chongqing University Chongqing 400030 China

The physical model test of a tunnel is made on the triaxial model-test machine. The whole failure process is observed by applying full inner-spy photograph technology;with it the deformation and crack extension of key parts are studied. By using the strain measure technology, the strains of key parts of the surrounding rock are measured;according to this, the variability of the stresses of surrounding rock is studied. The measured values of the main physical and mechanical indices of the model material are closed to the theoretical values. Based on the mechanical property of the model material, the Mohr-Coulomb criterion with tension cut-off strain-softening model is established. The numerical simulation are worked with the same boundary condition as the model test;according to this, the plastic zone and the stress field of the surrounding rock are studied. We compare the failure process and the variation of stress of the surrounding rock of the model test with the numerical simulation and draw the conclusion that the two processes coincide with each other.

关键词： Strain

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Research on P2P-based application layer multicast technology for streaming media

Research on P2P-based application layer multicast technology...

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2nd International Workshop on Education Technology and Computer Science, ETCS 2010

作者： Wei, Xijuan Jia, Ruisheng Liu, Guang Yan, Xianghong Key Laboratory of Mine Disaster Prevention and Control College of Information Science and Engineering Shandong University of Science and Technology Qingdao China College of Information Science and Engineering Shandong University of Science and Technology Qingdao China

ISBN: (纸本)9780769539874

The application layer multicast for streaming media is one of the hot and difficult problems in the field of network video broadcast. At first, the paper analyzed the principles and performances of classical application layer multicast models suitable for streaming media. Then we pointed out the application occasion of every model and the advantages and disadvantages. At last, a cluster splitting algorithm based on NICE is proposed. Simulation experiments show that the algorithm is simple and efficient, and able to adapt well to real-time streaming media applications. © 2010 IEEE.

关键词： Multicasting

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Numerical simulation of electric field characteristics in response to water in-rush in working face

Numerical simulation of electric field characteristics in re...

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作者： Cheng, Jiulong Sui, Haibo Wang, Yuhe Cai, Mingfeng Jiang, Guoqing State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology Beijing 100083 China Key Laboratory of Mine Disaster Prevention and Control Shandong University of Science and Technology Qingdao 266510 China Key Lab. for the Exploitation of Southwestern Rsrc. and the Environ. Disaster Control Engineering Ministry of Education Chongqing 400044 China CPECC East China Design Branch Qingdao 266071 China

ISBN: (纸本)9789078677383

According to the principle of resistivity detecting method and influencing law of resistivity in mining affected floor strata, different geoelectric models were constructed, such as model with water in-rush fractured zone in floor, working face advances to different distances, water in-rush after mining. Based on the "bipole-dipole" device, forward modeling was carried out by three-dimensional finite difference method. Apparent resistivity curves of different models can be obtained through numerical calculation and CT images can be obtained by processing the resistivity data with computerized tomography. Response characteristics of electric field in water in-rush working face can be analyzed by combing apparent resistivity curves with CT images. The results show that: good geological results could be achieved through numerical simulation of electric field response characteristics by using finite difference method and analyzing electric field characteristics of water in-rush in working face. This study provides theoretical basis for water in-rush detection using the resistivity method. © Atlantis Press, 2010.

关键词： Computerized tomography

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Study on anchored red sandstone's creep characteristic test and its constitutive model

Study on anchored red sandstone's creep characteristic test ...

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作者： Zhao, Tongbin Tan, Yunliang Liu, Shanshan Chen, Yunjuan Zhao, Zhigang Key Laboratory of Mine Disaster Prevention and Control Shandong University of Science and Technology Qingdao Shandong 266510 China College of Resources and Environmental Engineering Shandong University of Science and Technology Qingdao Shandong 266510 China Jinan Time Assay Testing Machine Co. Ltd. Jinan Shandong 250000 China Key Lab. for the Exploitation of Southwestern Rsrc. and the Environ. Disaster Control Engineering Ministry of Education 400044 China

ISBN: (纸本)9789078677383

In order to reveal deformation laws of anchored rock under long-term loads, in this paper, creep mechanical characteristics of anchored rock are analyzed, and anchorage constitutive model considering time effect is initially studied based on laboratory tests. Red sandstone of good homogeneity is used as anchored matrix, bamboo as the anchor, mixture of barite powder and rosin alcohol as the binder, then anchored red sandstone is made according to the similar criteria. Non-anchored and anchored specimens' indoor long-time (above 100h) creep test is conducted by RLJW-2000 rheology tester, The results show that, creep stress threshold of anchored rock is increased by about 30%σc, creep deformation at different stress level stage is significantly controlled, and anchored specimen's long-term intensity is increased by 5%∼10%σ c, which still has some capacity after destroyed. In addition, starting from the overall mechanical effect of anchor's reinforcement to rock, according to equivalent co-deformation principle, one-dimensional creep constitutive equation of anchored rock is established, the answer of anchored generalized Kelvin (B-K) model is derived and control mechanism on creep deformation of rock by bolt is analyzed. © Atlantis Press, 2010.

关键词： Creep

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Research on deep seam floor water-bursting assess index system

Research on deep seam floor water-bursting assess index syst...

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作者： Zhang, Wenquan Sun, Ming Yan, Wenzhu Hua, Xiang College of Resources and Environmental Engineering Shandong University of Science and Technology Qingdao 266510 China Ministry of Education Key Laboratory of Disaster Prevention and Control Qingdao 266510 China Inner Mongolia University of Science and Technology Baotou 014010 China

ISBN: (纸本)9789078677383

Deep seam floor water-bursting is a complicated non-linear geomechanics system, whose factors are coupling and influencing each other. By building the asses index system, it gets each factors' function of water-bursting. According to the four different grey controlling indexes, the main controlling factors are put forward by the grey correlation calculation and "nine factors theory" is out. Based on the different weighting methods, the entropy adjusting the ancient is used to ascertain the main factors' contribution weights, combined static weight with dynamic weight well, so it can provide the comparably correct result for the mathematics model building and discrimination system development. © Atlantis Press, 2010.

关键词： Floors

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DYNAMIC BEHAVIORS OF A FRACTIONAL ORDER VISCOELASTIC TWO-MEMBER TRUSS SYSTEM

DYNAMIC BEHAVIORS OF A FRACTIONAL ORDER VISCOELASTIC TWO-MEM...

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The Third International Conference on Dynamics,Vibration and control(第三届国际动力学、运动与控制学术会议)

作者： LI Yuan-ping ZHANG Wei Key Lab of Disaster Forecast and Control in Engineering Ministry of EducationChina (Jinan University) Guangzhou 510632 China Department of Electronic EngineeringJinan University Guangzhou 510632 China Department of Mechanics and Civil Engineering Jinan University

The dynamic behaviours of a viscoelastic two-member truss system, subjected to sinusoidal excitation, are investigated in this *** viscoelastic material was assumed to obey the fractional calculus constitutive *** dynamic equation and the numerical computation scheme suited for this nonlinear fractional viscoelastic system are deducted;the dynamic behaviours are investigated by means of numerical methods of nonlinear dynamics, such as time domain, phase diagram, Poincare map, and so *** is found that there are plenty of dynamical phenomena, such as periodicity, bifurcation, quasi-periodicity and chaos in the system and the dynamical character is greatly inflected by the varying of material parameters.

关键词： Fractional derivative Viscoelasticity Mises truss Chaos

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