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Dynamic capacity balance between stripping and mining of a dragline stripping system

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International Journal of Coal Science & Technology 2020年第2期7卷 380-387页

作者： Shuangshuang Xiao guowei dong Hongsheng Wang School of Energy Engineering Xi’an University of Science and TechnologyXi’an710054China

The reliability factors of a dragline stripping system were analyzed using system reliability theory to improve its reliability and ensure the stability of surface coal mine *** relationship between the dragline scheduled stripping volume with both the weighted average thickness of the coal seam and the height of the blast casting bench was *** results show that the reliability of the dragline stripping system decreases with the weighted average thickness of the coal seam and increases with a reduced casting blast bench height and monthly raw coal production ***,the dynamic monthly advance distance of the dragline stripping system was found,a new concept of the dragline stripping system reliability and measurement methodology were proposed,and a prediction model for the dragline production capacity was established using a generalized regression neural *** addition,the steps and processes of the reliability were *** study on the Heidaigou surface mine shows that the height of the casting blast bench should be reduced to 10.5 m when its raw coal production capacity is improved from 20 to 30 Mt/*** the normal production of surface coal,the system reliability can be improved by dynamically determining the weighted average coal seam thickness,accurately predicting the dragline production capacity,and taking other corresponding measures.

关键词： Surface mine Stripping technology Reliability Dynamic adjustment

In-situ experimental investigation of the influence of structure characteristics on subway-induced building vibrations

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Earthquake Engineering and Engineering Vibration 2021年第3期20卷 673-685页

作者： Feng Shijin Li Fuhao Zhang Xiaolei dong guowei Li Jianping Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Department of Geotechnical EngineeringTongji UniversityShanghai 200092China

Many types of buildings have been widely constructed in the vicinity of subway lines in *** life and business activities are hampered by excessive subway-induced *** study aims to determine the influence of structure characteristics on structure-borne vibrations,generally based on experimental *** measurements were performed in four typical sites in Wuxi,China,involving over-track buildings,along-track buildings,frame structure buildings and a masonry *** structure designs like structure transfer floor were also ***,the captured data was analyzed in the time domain and the frequency ***,the influence of building location,structure type and structure layout was ***,vibrations were evaluated with ISO and Chinese criteria and structure optimization for vibration attenuation was *** is found that over-track buildings are more severely affected than along-track *** frequency contents(20‒60 Hz)in over-track buildings and lower frequency contents(0‒10 Hz)in along-track buildings should be seriously considered in vibration *** structure member joints and lower material strength would be beneficial to over-track buildings while the inverse situation would be beneficial to along-track *** application of structure transfer floor‒generally stiffer structure members and structure discontinuity‒is also beneficial.

关键词： subway-induced vibration structure characteristic vibration evaluation vibration control structure optimization

Adaptive Attitude Control for Multi-MUAV Systems With Output Dead-Zone and Actuator Fault

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IEEE/CAA Journal of Automatica Sinica 2021年第9期8卷 1567-1575页

作者： guowei dong Liang Cao Deyin Yao Hongyi Li Renquan Lu School of Automation and the Guangdong Province Key Laboratory of Intelligent Decision and Cooperative Control Guangdong University of TechnologyGuangzhou 510006China

Many mechanical parts of multi-rotor unmanned aerial vehicle(MUAV)can easily produce non-smooth phenomenon and the external disturbance that affects the stability of *** multi-MUAV attitude systems that experience output dead-zone,external disturbance and actuator fault,a leader-following consensus anti-disturbance and fault-tolerant control(FTC)scheme is proposed in this *** the design process,the effect of unknown nonlinearity in multi-MUAV systems is addressed using neural networks(NNs).In order to balance out the effects of external disturbance and actuator fault,a disturbance observer is designed to compensate for the aforementioned negative *** Nussbaum function is used to address the problem of output *** designed fault-tolerant controller guarantees that the output signals of all followers and leader are synchronized by the backstepping ***,the effectiveness of the control scheme is verified by simulation experiments.

关键词： Disturbance observer fault-tolerant control(FTC) multi multi-rotor unmanned aerial vehicle(multi-MUAV)attitude systems neural networks(NNs) output dead-zone

Multi-factor dynamic analysis of the deformation of a coal bunker in a coal preparation plant

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International Journal of Coal Science & Technology 2021年第5期8卷 1067-1077页

作者： Shuangshuang Xiao Qing Yang guowei dong Hongsheng Wang School of Energy Engineering Xi’an University of Science and TechnologyXi’an 710054ShaanxiChina School of Management Xi’an University of Science and TechnologyXi’an 710054ShaanxiChina

To assess the deformation of a coal bunker and propose effective preventative measures for such,a real-time monitoring system was ***,methods were proposed for monitoring the coal-bunker inclination,settlement,groundwater level,temperature,and material *** using a vector autoregression model and time-series data for the coal-bunker deformation,a long-term equilibrium relationship was derived between the coal-bunker inclination and settlement and their influencing *** dynamic effects of each factor on the coal-bunker inclination and settlement and how the contribution of each factor changes were revealed by using an impulse response function and variance *** results show that the coal-bunker inclination and settlement vary *** level has constant and small negative effects on the coal-bunker inclination and settlement,and temperature has continuous and significant negative effects;however,material level has constant positive effects on the coal-bunker settlement and slightly influences the eastward inclination while significantly influencing the northward inclination of the coal ***,unbalanced loading has little influence on the coal-bunker settlement and eastward inclination but significant influence on its northward ***,monitoring of the coal-bunker deformation should be strengthened in summer,and sudden changes in material level and unbalanced loading should be avoided during ***,the coal-bunker inclination can be adjusted by unbalanced loading in the reverse direction.

关键词： Coal bunker Settlement Influence factor Dynamic analysis

Modeling Strain Rate Effect for Heterogeneous Brittle Materials

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Transactions of Tianjin University 2006年第B09期12卷 79-82页

作者： MA guowei dong Aiai LI Jianchun School of Civil and Environmental Engineering Nanyang Technological University Singapore 639798

Rocks are heterogeneous from the point of dynamic failure behavior. Both the compressive and microstructure which is of significance to their tensile strength of rock-like materials is regarded different from the static strength. The present study adopts smoothed particle hydrodynamics （SPH） which is a virtual particle based meshfree method to investigate strain rate effect for heterogeneous brittle materials. The SPH method is capable of simulating rock fracture, free of the mesh constraint of the traditional FEM and FDM models. A pressure dependent J-H constitutive model involving heterogeneity is employed in the numerical modeling. The results show the compressive strength increases with the increase of strain rate as well as the tensile strength, which is important to the engineering design.

关键词： heterogeneous strain rate effect SPH method

Adaptive NNs Backstepping Fault Control for A Class of Nonlinear Systems 36

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Adaptive NNs Backstepping Fault Control for A Class of Nonli...

新兴市场后发企业逆向创新路径研究——来自华为公司的案例分析

第36届中国控制会议

作者： guowei dong Yongming Li Shaocheng Tong College of Science Liaoning University of Technology

ISBN: (纸本)9781538629185

In this paper,the problem of fault-tolerant control（FTC） is investigated for a class of nonlinear single input and single output（SISO） systems in the non-strict feedback *** considered system possess unknown nonlinear functions,measured states,unknown control direction and actuator faults（bias and gain faults）.With the help of Neural Network System（NNs） to approximate the unknown nonlinear functions and a fuzzy adaptive observer is designed to estimate the unmeasured *** the frame of adaptive backstepping design technique,and by combining with the nonlinear fault-tolerant control theory,the control performance of the closed-loop system is guaranteed by suitably choosing the design parameters,an adaptive NNs output feedback FTC method is *** is shown that the given control approach can prove that all signals in the closed-loop system are proved to be bounded,and the tracking errors between the system outputs and the reference signals converge to a small neighborhood of zero by choice of the design parameters.

关键词： fault-tolerant control adaptive NNs control adaptive backstepping design

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科技进步与对策 2017年第2期34卷 87-93页

作者：单娟董国位上海大学管理学院上海200444

作为一种全新的创新全球化扩散模式,逆向创新理论研究尚处于起步阶段。选取华为公司作为逆向创新研究案例,从技术和市场两大维度探讨其逆向创新发展模式,总结其可以复制推广的经验和做法,并提出新兴市场后发企业逆向创新路径与驱动力模... 详细信息

作为一种全新的创新全球化扩散模式,逆向创新理论研究尚处于起步阶段。选取华为公司作为逆向创新研究案例,从技术和市场两大维度探讨其逆向创新发展模式,总结其可以复制推广的经验和做法,并提出新兴市场后发企业逆向创新路径与驱动力模型。在丰富并发展逆向创新理论的同时,也为中国企业特别是后发高科技企业提高创新能力以及加快国际化进程提供了借鉴与启示。

关键词：逆向创新后发企业国际化驱动力

Reliability Evaluation of Hybrid Wind-photovoltaic-hydro Power Generation System Based on Multiple Operating Scenarios

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Reliability Evaluation of Hybrid Wind-photovoltaic-hydro Pow...

CXCL12/CXCR4生物学轴及AMD3100对舌鳞癌Tca8113细胞侵袭行为的影响

第40届中国控制会议

作者： Xie Xiaojun Wu Qiong dong guowei Zhang Ruigang Yang Bo Meiling Wang Xi'an Thermal Power Research Institute Co. Ltd Xi'an Jiaotong University

In recent years,many countries have been striving to replace fossil energy with renewable ***,the access of a large amount of renewable energy has brought huge challenges to the operation of the *** is an important issue to evaluate the reliability of renewable energy systems connected to the *** this paper,sequential Monte Carlo simulation method to evaluate the operational reliability of the hybrid wind-photovoltaic-hydro power generation system based on the time series load model is *** the multi-scenario simulation,Latin Hypercube sampling can be used to sample time series of wind power output,photovoltaic output,hydropower output and load demand ***,the reliability evaluation index of hybrid wind-photovoltaic-hydro power generation system is ***,the calculation results are shown that different power configuration capacities have significantly various effects on the reliability of power grid operation.

关键词： Wind-photovoltaic-hydro power generation system sequential Monte Carlo Latin hypercube sampling reliability assessment

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实用口腔医学杂志 2018年第3期34卷 400-403页

作者：王钢董国伟郑州大学附属洛阳中心医院 471000

目的:研究探讨CXCL12/CXCR4生物学轴和CXCL12抑制剂AMD3100对癌细胞侵袭行为的影响。方法:将体外培养的Tca8113细胞分为4组:对照组细胞常规培养,CXCL12组(CX组)附加终浓度100 ng/ml的CXCL12培养细胞,AMD3100组(AM组)附加终浓度为1μg/ml... 详细信息

目的:研究探讨CXCL12/CXCR4生物学轴和CXCL12抑制剂AMD3100对癌细胞侵袭行为的影响。方法:将体外培养的Tca8113细胞分为4组:对照组细胞常规培养,CXCL12组(CX组)附加终浓度100 ng/ml的CXCL12培养细胞,AMD3100组(AM组)附加终浓度为1μg/ml的AMD3100培养细胞,干预组(AM+CX组)以1μg/ml的AMD预处理1 h后加入100ng/ml CXCL12培养细胞,各组细胞培养48 h。逆转录PCR检测细胞CXCR4受体mRNA表达;用Transwell小室检测细胞侵袭力。结果:对照组、CX组、AM组、AM+CX组CXCR4 mRNA相对表达量分别为0.514±0.057、0913±0.018、0.486±0.053和0.260±0.023;细胞穿膜数分别为43.6±2.3、75.1±2.9、42.5±2.5和32.2±1.9。结论:CXCR4受体在舌鳞癌Tca8113细胞阳性表达;CXCL12能促进Tca8113细胞侵袭力,AMD3100可抑制其迁移。

关键词： CXCL12/CXCR4 侵袭 Tca8113细胞 AMD3100