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A construction strategy for cloud robotic system

Sensor Letters 2014年第2期12卷 255-259页

作者： Liang, Yongquan Zhang, Zhenmei Fan, Jiancong Tang, Leiyu State Key Laboratory of Mining Disaster Prevention and Control Ministry of Science and Technology Shandong University of Science and Technology Qingdao China College of Information Science and Engineering Shandong University of Science and Technology Qingdao China College of Management Science and Engineering Shandong University of Finance and Economics Jinan China College of Mathematics and Systems Science Shandong University of Science and Technology Qingdao China

The technological developments of sensors, actuators, communication devices, and especially cloud computing, enable cloud robotics to be studied and designed. A cloud robot is a robot with lightweight inherent configurations, but connected to the cloud. Cloud robotics can offload computationintensive tasks to be executed in remote cloud. In this paper, we design two types of cloud robotic structures, called homoRobotSys and heteroRobotSys respectively. Different structures are designed to adapt to different task-relevant or configuration-relevant requirements. Simulation is developed to discuss time performances of cloud robotics. Comparisons between cloud robotics and networked robotics are also made. Copyright © 2014 American Scientific Publishers.

关键词： Cloud computing

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On the convergence and property analysis of estimation of distribution algorithms-based machine learning

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Sensor Letters 2014年第2期12卷 409-413页

作者： Fan, Jiancong Tang, Leiyu Zhang, Zhenmei Feng, Zheng State Key Laboratory of Mining Disaster Prevention and Control Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao China College of Information Science and Engineering Shandong University of Science and Technology Qingdao China College of Mathematics and Systems Science Shandong University of Science and Technology Qingdao China College of Management Science and Engineering Shandong University of Finance and Economics Jinan China

EDAs-based machine learning is to achieve the optimal patterns hidden in dataset by estimation of distribution algorithms (EDAs). We analyze EDAs-based machine learning approach from the perspective of probabilistic evolution that is a unique superiority in evolutionary computation. Probabilistic evolution and its convergence are analyzed theoretically for learning from limited sized static dataset and dynamic data stream. We prove the feasibility, efficiency, and optimality of EDAs-based machine learning with several theorems and illustrations of practical examples. Copyright © 2014 American Scientific Publishers.

关键词： Learning algorithms

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Highly Efficient Photocatalytic Activity of β-Bi2O3 Decorated Graphene Nanosheets

Highly Efficient Photocatalytic Activity of β-Bi2O3 Decorat...

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第十一届中日复合材料学术会议（CJJCC-11）

作者： Jun Yang Mei Wang Longjun Xu Chenglun Liu State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University College of Chemistry and Chemical Engineering Chongqing University

β-Bi2O3 decorated Graphene Nanosheets(GN/β-Bi2O3) were prepared by a facile solution-mixing method,furthermore the influence of graphene content on photocatalytic activity was systematically investigated. The results indicated that these composites have high degradation rate of RhB(about 3 times higher than that of bare β-Bi2O3) at graphene content 1%*** the content increased to 5%wt, the degradation rate decrease to only 1.1 times. This high photocatalytic activity is attributed predominantly to the presence of graphene, which serves as an electron collector and transporter to efficiently lengthen the lifetime of the photogenerated charge carriers from β-Bi2O3. Moreover,the crystal structure, surface morphology and optical properties of resulted materials were characterized by XRD, SEM and UV-vis diffuse reflection, respectively.

关键词： photocatalysis GO/β-Bi2O3 graphene-based composites

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Comparison of Methane Hydrate Formation in Stirred Reactor and Porous Media in the Presence of SDS

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Energy Procedia 2014年 61卷 1573-1576页

作者： Dong-Liang Zhong Shuang-Yi He Dong-Jun Sun Chen Yang State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Chongqing 400044 China College of Power Engineering Chongqing University Chongqing 400044 China

In this work, methane hydrate formation was compared between a stirred reactor and a fixed bed of porous media (silica sand) in the presence of sodium dodecyl sulfate (SDS). The experiments were carried out in batch operation and at 7.0 MPa and 274.15 K. The aqueous concentration of SDS used was in the range of (300-1500 ppm). The results indicated that the SDS concentration of 500 ppm was found to be an optimum concentration for methane hydrate formation, and methane hydrate formation was significantly promoted in the fixed bed of silica sand with 500 ppm SDS as compared to those using SDS solutions in the stirred reactor. The water conversion to hydrate and the gas storage capacity achieved 78.1% and 139.8 V/V, respectively.

关键词： Gas hydrates SDS Porous media Gas storage Methane

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Evolution laws of strength parameters of soft rock at the post-peak considering stiffness degradation

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2014年第4期15卷 282-290页

作者： Zeng-hui ZHAO Wei-ming WANG Xin GAO State Key Laboratory of Mining Disaster Prevention and Control Co-foundedby Shandong Province and the Ministry of Science and Technology Qingdao 266590 China College of Mining and Safety Engineering Shandong University of Science and Technology Qingdao 266590 China College of Civil Engineering and Architecture Shandong University of Science and Technology Qingdao 266590 China

To evaluate the strength attenuation law of soft rock in the western mining area of China, we established an evolution model for the strength parameters of soft mudstone at the post-peak stage by employing a tri-linear strain softening model. In the model, a stiffness degradation coefficient co and a softening modulus coefficient a were introduced to take into account the stiff- ness degradation, and the subsequent yield surfaces at post-peak stage were all assumed to meet the Molar-Coulomb yield criterion. Furthermore, attenuation laws of stiffness and strength parameters of soft mudstone were analyzed according to an engineering case. Finally, the model＇s accuracy was verified by comparison of results from numerical calculation and tri-axial compression tests. Results showed that the attenuation of the friction angle was dominated mainly by the instantaneous stress states and damage features, while the attenuation law of cohesion was also related to the plastic behavior. The degradation rates of strength param- eters decreased with increasing confining pressure and the friction angle tended towards its initial value. Residual strengths were also enhanced with increasing confming pressure. The results indicate that the evolution model can accurately describe the strain softening behavior of soft rock.

关键词： Soft rock Strain softening Stiffness degradation Strength evolution Evolution law

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EXTENSION OF COMBINED SELF-CONSISTENT AND MORI-TANAKA APPROACH TO EVALUATION OF ELASTOPLASTIC PROPERTY OF PARTICULATE COMPOSITES

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Acta Mechanica Solida Sinica 2013年第1期26卷 71-82页

作者： Xianghe Peng Ning Hu Xuesong Long Hengwei Zheng Department of Engineering Mechanics Chongqing University State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Department of Mechanical Engineering Chiba University

The combined self-consistent and Mori-Tanaka approach proposed for the evaluation of the effective elastic property of particulate composites is extended to evMuate the effective elastoplastic property of particulate composites. Suppose there are sufficient identical particle inclusions with total volume fraction c in a representative volume element （RVE） of a particulate composite, these inclusions are separated into two groups, with volume fractions （1 -A-1）c and c/A over the RVE, respectively. We assume that the first group of inclusions has already been embedded in the original matrix to form a fictitious matrix, and the RVE of the composite consists of the fictitious matrix and the second group of particle inclusions. The property of the fictitious matrix is determined by the conventional self-consistent scheme, while the effective elastoplastic property of the composite is determined by the conventional Mori-Tanaka scheme. Analysis shows that, the conventional Mori-Tanaka scheme and self-consistent scheme can be obtained as the two limit cases of the extended approach as A = 1 and A = c~, respectively. The constitutive behavior of the inclusions in either Group I or Group II is identical, indicating the consistency in the description of the constitutive behavior in the two steps. ~klrthermore, the effective elastoplastic behavior of some typical particulate composites is analyzed, and the satisfactory agreement between the computational and experimental results demonstrates the validity of the extended approach. The introduced A can serve reasonably as a parameter, which is related to the actual property of composites and can be identified by experiments, for a more accurate evaluation of the effective elastoplastic property of particulate composites.

关键词： particulate composite elastoplasticity effective property combined self-consistent and Mori-Tanaka approach

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Development model of circular eco-industrial park for comprehensive utilization of coal gangue in coal enterprise

Development model of circular eco-industrial park for compre...

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12th IUMRS International Conference on Advanced Materials, IUMRS-ICAM 2013

作者： Zhan, Xiao Yuan Wang, Fang Song, Zhen Qi Chen, Lian Jun Cui, Zeng Di College of Materials Science and Engineering Shandong University of Science and Technology Qingdao Shandong 266590 China State Key Laboratory Breeding Base for Mining Disaster Prevention and Control Shandong University of Science and Technology Qingdao 266590 China School of Resource and Earth Science China University of Mining and Technology Xuzhou Jiangsu 221116 China

ISBN: (纸本)9783038350873

Development of circular economy is a certain choice for economic sustainable development, to establish a circular eco-industrial park for comprehensive utilization of coal gangue in coal enterprise is a new exploration for circular economy. In order to make vast and efficient use of existing and newly increased coal gangue to resolve the serious environmental and ecological problems, the preparation of coal gangue glued stone was investigated. The glued stone products could be used for backfill material;In order to produce the coal gangue glued stone, we heated the coal gangue in the rotary kiln, and the flue gas waste heat could be recovered and used for thermal power generation, and the power is back to the circular eco-industrial park. The mining wastewater could be used for power generation, domestic water and production water after compound purification treatment. Associated effects and synergistic effects of the different industries that integrated and connected with each other could get the double wins between the economic development and the environmental protection. © (2014) Trans Tech Publications, Switzerland.

关键词： Waste heat

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Safety culture assessment of petroleum enterprises based on SMART: 收藏
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引用; Chinese Journal Of Geochemistry 2013年第3期32卷 273-280页; 作者： CHEN Kun XU Longjun YANG Rui BI Zhiming State Key Laboratory of Coal Mine Disaster Dynamics and Control (Chongqing University) College of Safety Engineering Chongqing University of Science and Technology; This paper introduces an improved fuzzy comprehensive evaluation model specially designed for the safety culture assessment of petroleum enterprises. The model is established based on the authors' years of experie... 详细信息; This paper introduces an improved fuzzy comprehensive evaluation model specially designed for the safety culture assessment of petroleum enterprises. The model is established based on the authors' years of experience in this field. The index system of the safety assessment mentioned herein is based on SMART safety culture principles, covering safety material, safety behavior, safety system, safety belief, persistence of safety, and openness of safety. The proposed system also includes the safety material culture, in which on-the-spot analysis of the key factors of safety culture is conducted together with duty consultants. All the fuzzy membership indexes and their degrees were weighed and calculated with the final evaluation results, presented in accordance with the analytic hierarchy process. All the safety culture statuses of petroleum enterprises Z, S, and C were then incorporated into detailed analysis. The results of the application confirm that the levels of safety culture follow the order of Z petroleum enterprise ~~key~~ ~~factors in safety culture construction for petroleum enterprises. Thus, the proposed model heightens production levels, and plays an important role in the construction of business safety culture.~~; 关键词：企业安全文化建设评估指标体系石油企业模糊综合评价模型智能安全物质文化安全系统安全可靠性; 来源：评论; 学校读者我要写书评

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PKinetics analysis of the enzymatic hydrolysis of cellulose from straw stalk

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Chinese Journal Of Geochemistry 2013年第1期32卷 41-46页

作者： CHEN Kun XU Longjun BI Zhiming FU Zhilei State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University College of Safety Engineering Chongqing University of Science and Technology

The effects of several parameters on the simultaneous saccharification and fermentation of straw stalk for ethanol fuel production were investigated on the basis of orthogonal experiments. The parameters include tempe... 详细信息

The effects of several parameters on the simultaneous saccharification and fermentation of straw stalk for ethanol fuel production were investigated on the basis of orthogonal experiments. The parameters include temperature and time of fermentation, quantity and proportion of yeast inoculation, as well as cellulase dosage. An ethanol yield of 0.183 g/g was obtained from the straw stalk pretreated with diluted acid under determined optimum conditions. These conditions were: fermentation temperature: 38℃; fermentation time: 72 h; yeast inoculation quantity: 15%; yeast inoculation proportion: 2:1; and cellulose enzyme dosage: 20 U/g. The relationship between ethanol concentration c and fermentation time t is presented as follows, c=abt/(1+bt). The rate constant k of straw stalk hydrolysis by the cellulose enzyme depends on hydrolysis time, as described by k=k1t-h. Therefore, straw stalk hydrolysis reaction by the cellulose enzyme is fractal-like.

关键词：纤维素酶酶水解动力学分析秸秆发酵时间反应速率常数乙醇燃料发酵生产

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Extraction kinetics of strontium with SDS and Twain in celestine

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Chinese Journal Of Geochemistry 2013年第3期32卷 269-272页

作者： LIU Chenglun SU Zhimin XU Longjun ZHANG Li XIE Taiping WANG Yuan College of Chemistry and Chemical Engineering Chongqing University State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University

Strontium in celestine was activated in Twain-40 with the wetting and emulsifying methods. And strontium extract ratio increased providing that the negative effects of oxygen containing functional groups were eliminat... 详细信息

Strontium in celestine was activated in Twain-40 with the wetting and emulsifying methods. And strontium extract ratio increased providing that the negative effects of oxygen containing functional groups were eliminated on celestine surface. In the paper, the factors affecting the extraction of strontium in celestine were investigated with orthogonal experiments. The optimal conditions were described as follows: mass ratio of celestine to extracting aid=2.6:1, the solid-liquid ratio of extracting aid solvent composed was m(SDS): m(Twain 40): m(HCl)=6:1:2, when celestine was ground as small as less than 0.075mm in size, and extracted for 6 hours at 333K. The strontium extract ratio increased by 61.33% and reached 97.21%, while the ratio from the comparative experiment (without extracting aid agent) was only 35.88%. Extraction kinetics of strontium in celestine showed that the diffusion process was a controlling step, and the apparent active energy was about 14.1 kJ/mol. The research results were helpful to fully utilize strontium of celestine.

关键词：萃取动力学吐温40 天青石 SDS 提取锶表面含氧官能团乳化方法

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