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Terrain classification based on adaptive weights with airborne LiDAR data for mining area

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中国有色金属学会会刊：英文版 2011年第S3期21卷 648-653页

作者： LI Hui-ying1, WANG Zhi2. SUN Ya-feng1, LI Wen-hui1 1. College of Computer Science and technology, Jilin university, Changchun 130012. China 2. College of Resources and Civil Engineering, Northeastern university, Shenyang 110004, China [a] College of Computer Science and technology Jilin University Changchun 130012 China [b] College of Resources and Civil Engineering Northeastern University Shenyang 110004 China

The fast high-efficiency inspection for mining subsidence of mine area is a reliable way for forecasting accident and evaluating losing expense. In order to monitor mining subsidence of exploitation mine efficiently, LiDAR data were used and a novel strip division method was brought forward based on separating-treatment theory, which divided the mass of discrete three-dimensional point cloud data into a series of parallel strips and reduced the dimension in each strip. Polynomial fitting algorithm based on the adaptive weights, which located in the range of the strip, was used for classification complex terrain data of mine-area. The results show that LiDAR datamation can be greatly reduced. In the mean time, the time spending for calculation is shortened, and computational complexity is simplified. Therefore, high-efficiency terrain classification of LiDAR point cloud method can be great beneficial to monitoring environment of mine area.

关键词： mining subsidence airborne LiDAR strip division adaptive weights

Research on the Long Time Swelling Properties of Poly (vinyl alcohol)/Hydroxylapatite Composite Hydrogel

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Journal of Bionic Engineering 2009年第1期6卷 22-28页

作者： De-kun Zhang~(1,3), Da-gang Wang~2. Jun-jie Duan~(1,3), Shi-rong Ge~(2.3)1. School of Materials Science and Engineering, China university of mining and {2., Xuzhou 2.1116, P. R. China2. School of Mechanical and Electrical Engineering, China university of mining and {2., Xuzhou 2.1116, P. R. China3. Biotribology Center, National Key Laboratory of Tribology, Tsinghua university, Beijing 100083, P. R. China [a]School of Materials Science and Engineering China University of Mining and Technology Xuzhou 221116 P. R. China [b]School of Mechanical and Electrical Engineering China University of Mining and Technology Xuzhou 221116 P. R. China [c]Biotribology Center National Key Laboratory of Tribology Tsinghua University Beijing 100083 P. R. China

Poly(vinyl alcohol)/hydroxylapatite(PVA/HA)composite hydrogel was prepared by repeated freezing and *** water loss properties of the resultant hydrogel were investigated by using optical *** time immersion tests of PVA/HA composite hydrogel were carried out in the diluted calf serum solution to study the change laws of swelling properties with the freezing-thawing cycles and HA *** micro-morphologies of PVA/HA composite hydrogel after long time immersion were observed by means of the high-accuracy 3D *** results show that the swelling process of PVA/HA composite hydrogel is the converse process of its water *** time swelling ratio curves of PVA/HA composite hydrogel in the calf serum solution are manifested as four stages of quick increase,decrease,slow decrease and stable balance,and its equilibrium swelling ratio decreases with the increase of freezing-thawing cycles and HA *** is revealed that the network structure of the composite hydrogel immersed for a long period is significantly improved with the increase of HA content. Perfect network structures of PVA/HA composite hydrogel as well as full and equilibrium tissues after swelling equilibrium are obtained when the HA content is 3% and the number of freezing-thawing cycles is 7.

关键词： poly (vinyl alcohol) hydroxyapatite composite hydrogel swelling property morphology

Power allocation scheme for selfish cooperative communications based on game theory and particle swarm optimizer

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Science China(Information Sciences) 2010年第9期53卷 1908-1912页

作者： ZHANG GuoPeng1*,YANG Kun2.& DING EnJie3 1School of Computer Science and technology,China university of {2. and technology,Xuzhou 2.1116,China 2.chool of Computer Science and Electronic Engineering,university of Essex Wivenhoe Park,Colchester CO_4 3SQ,UK 3School of Information and Electrical Engineering,China university of {2. and technology,Xuzhou 2.1116,China 1. School of Computer Science and technology China University of Mining and Technology Xuzhou 221116 China2. School of Computer Science and Electronic Engineering University of Essex Wivenhoe Park Colchester CO4 3SQ UK3. School of Information and Electrical Engineering China University of Mining and Technology Xuzhou 221116 China

In commercial networks,autonomous user nodes operating on batteries are assumed to be selfish to consume their energy solely to maximize their own benefits,e.g.,data *** this letter a two-user cooperative game is proposed to perform the power allocation for selfish cooperative communication *** the game,one selfish user node could trade its transmission power for the other ones cooperative relaying directly,and both user nodes are willing to achieve an optimal data-rate increase through cooperative *** find the Nash bargaining solution(NBS) of the game,a low-complexity numerical particle swarm optimizer(PSO) algorithm is also *** results indicate that the NBS of the game is efficient,in that both users could experience better performance than they work independently,and fair,in that the degree of cooperation of a user node only depends on how much contribution its partner can make to improve its own performance.

关键词： cooperative communication power allocation game theory Nash bargaining solution particle swarm optimizer

Study on Biotribological Behavior of the Combined Joint of CoCrMo and UHMWPE/BHA Composite in a Hip Joint Simulator

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Journal of Bionic Engineering 2009年第4期6卷 378-386页

作者： Qingliang Wang, Jinlong Liu, Shirong GeCollege of Materials and Engineering, China university of mining and {2., Xuzhou 2.1007, P. R. China [a] College of Materials Engineering China University of Mining technology Xuzhou 221007 P. R. China

UHMWPE composites reinforced with Bovine Bone Hydroxyapatite(BHA)in different contents were prepared by heat pressing formation method.A hip joint wear simulator was used to investigate the biotribological behavior of UHMWPE/BHA composite acetabular cups against CoCrMo alloy femoral heads in bovine synovia lubrication at 37±1 ℃.It was found that the addition of BHA powder to UHMWPE can improve the hardness and creep modulus of UHMWPE/BHA composites,and decrease their wear rates under bovine synovia *** the content of BHA filler particles was up to 30 wt%, UHMWPE/BHA composites demonstrated the well design performances of the surface and biotribological ***, ploughing and slight adhesive wear were the main wear mechanisms for UHMWPE and its *** addition,the sizes of wear particles became larger with an increase in BHA powder *** results suggest that BHA filler is a desirable component to increase the wear resistance of UHMWPE/BHA composites for biomedical applications.

关键词： UHMWPE hydroxyapatite biotribology joint prosthesis

Adsorption of oil from waste water by coal:characteristics and mechanism

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mining Science and technology 2010年第5期20卷 778-781页

作者： LI Xiaobing,ZHANG Chunjuan,LIU Jiongtian School of Chemical Engineering and technology,China university of {2. & technology,Xuzhou 2.1116,China [a] School of Chemical Engineering technology China University of Mining&Technology Xuzhou 221116 China

The work described here was focused on exploring the potential application of coal to purification of oily waste *** was added to oily waste water as an adsorbent and then removed through a flotation *** allowed economical and highly efficient separation of oil from the waste *** absorption time,coal type,coal particle size distribution,pH value and oil concentration were *** results indicate that oil absorption by a coal increases for a period of 1.5 h and then gradually tends toward an equilibrium *** appears that the absorption capacity of anthracite is more than that of lean coal or lignite,given the same coal particle size *** absorption capacity of a coarse coal fraction is less than that of finer coal,given the same of coal *** absorption capacity of anthracite decreases slightly as the pH increases from 4 to *** adsorption of oil on anthracite follows the Freundlich isothermal adsorption law:given initial oil concentrations of 160.5 or 102..6 mg/L the absorption capacity was 2..8 or 840.0 mg/*** absorption mechanism consists of two kinds of absorption,a physical process assisted by a chemical one.

关键词： oily wastewater waste water separation coal oil adsorption mechanism

Kinetics and mechanism of the reaction between thiourea and iodate in unbuffered medium

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Science China Chemistry 2004年第6期47卷 480-487页

作者： WANG Shun1,2. LIN Juanjuan1, CHEN Fan1, HU Maolin1, HU Xingen1, HAN Yiping1 & GAO Qingyu2.1.Department of Chemistry and Material Science, Wenzhou Normal College, Wenzhou 32.02., China 2. College of Chemical Engineering, China university of mining and {2., Xuzhou 2.1008, China 1. Department of Chemistry and Material Science Wenzhou Normal College 325027 Wenzhou China 2. College of Chemical Engineering China University of Mining and Technology 221008 Xuzhou China

The reaction between iodate and thiourea has been studied in an unbuffered acidic medium. In excess iodate the reaction shows not only oligooscillations in pH, Pt potential and the concentration of iodide ion, [I?], but also an initial induction period which has the linear relation with initial pH. At the end of the induction period, [I?] decreases sharply and a yellow coloration (due to iodine) appears transiently. While in excess thiourea iodine is produced and finally con- sumed, leaving milky deposits (due to sulfur) at the end of the reaction. The induction period from the start of the reaction to the maximum of [I2. is also directly proportional to initial pH. A 14-step mechanism, including a H+-mediated preequalibrium, Dusman reaction, iodine-sulfur reactions and sulfur-sulfur reactions, is proposed. Computer simulations using this mechanism give good agreement with experiments.

关键词： oligooscillations, pH dynamics, thiourea, iodate, complex reaction mechanism, dynamic simulation.

Effect of cavitation on comminution of mica powder

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Journal of university of Science and technology Beijing 2002年第5期9卷 326-328页

作者： Chuwen Guo, Linsheng Liu, Donghai Zhang, and Kai CuiChina university of mining & {2., Xuzhou 2.1008, China China university of mining & {2. Xuzhou 221008 China

The cavitation abrasive water jet was used in the comminution ofmica. By applying a cavitation nozzle in the abrasive water jetsystem to enhance the effect of cavitation and friction, bettercomminution results were obtained. The JME-2.0CX transmission elec-tron microscope was used for observing the size distribution ofparticles. As using cavitation abrasive water jet, the relativecomminution effect is raised by more than 2./100 compared with usingabrasive water jet only. It can be concluded that the effect ofcavitation is much more significant than that of impacting in thecomminution of mica.

关键词： mica comminution cavitation abrasive water jet

Degradation of lignite model compounds by the action of white rot fungi

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mining Science and technology 2010年第1期20卷 76-81页

作者： DU Ying, TAO Xiuxiang, SHI Kaiyi, LI Yang School of Chemical Engineering and technology, China university of {2. & technology, Xuzhou 2.1000, China [a] School of Chemical Engineering technology China University of Mining & Technology Xuzhou 221000 China

Three compounds modeled on the lignite structure were chosen for experimental degradation by different fungi strains. Culture conditions and extracellular enzyme activities were optimized. The growth curves of the strains were determined to study mycelium dry weight and protein content changes. Gas chromatography and infrared spectroscopy were used to detect changes of functional groups before and after the action of the fungi on the model compounds. Possible decomposition products and degrada-tion mechanisms were proposed. The research findings show that C. Versicolor and Golden Mushroom can grow in presence of the model compounds. The optimum culture conditions were a pH of 6.0, a carbon-nitrogen ratio of five and a Tween-80 concentration of 0.1%. Newly produced substances were found by gas chromatography. Infrared analysis showed that the model compounds degraded under the action of the microorganisms.

关键词： coal biotransformation white rot fungi mechanism model compound

High-Resolution Sequence Stratigraphy and Coal Accumulating Models of the Permo-Carboniferous Coal Measures in Southwestern Shanxi

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地学前缘 2009年第S1期16卷 143-144页

作者： Zhenghui Xiao~(1,2.,Longyi Shao~2.Hao Wang~2.Jing Lu~2.1.Hunan university of Science and technology,Xiangtan 4112.1,China. 2.Department of Resources and Earth Sciences,China university of mining and technology(Beijing),Beijing 100083,China

The Qinshui Basin in southeastern Shanxi Province is an important base for coalbed methane exploration and production in *** methane reservoirs in this area are the Carboniferous and Permian coals and their thickness are strongly controlled by the depositional environments and the sequence stratigraphic *** paper analyzes the high-resolution sequence stratigraphy of the Permo-Carbo-

关键词： sequence stratigraphic framework coal-accumulating model Permo-Carboniferous Qinshui Basin