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Manipulator Neural Network Control Based on Fuzzy Genetic Algorithm

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High Technology Letters 2001年第1期7卷 63-66页

作者：崔平远 yang guojun Dept. of Space Engi. and Mechanics Harbin Institute of Technology

The three-layer forward neural networks are used to establish the inverse kinematics models of robot manipulators. The fuzzy genetic algorithm based on the linear scaling of the fitness value is presented to update the weights of neural networks. To increase the search speed of the algorithm, the crossover probability and the mutation probability are adjusted through fuzzy control and the fitness is modified by the linear scaling method in FGA. Simulations show that the proposed method improves considerably the precision of the inverse kinematics solutions for robot manipulators and guarantees a rapid global convergence and overcomes the drawbacks of SGA and the BP algorithm.

关键词： Inverse kinematics Neural networks Fuzzy control Genetic algorithm Fitness function

Mouse simulation in human-machine interface using kinect and 3 gear systems

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International Journal of Modeling, Simulation, and Scientific Computing 2014年第4期5卷 36-48页

作者： Yingnian Wu guojun yang Lin Zhang School of Automation Science and Electrical Engineering BeiHang University Beijing100191China School of Automation Beijing Information Science&Technology University Beijing 100192China

We never stop finding better ways to communicate with *** interact with computers we tried several ways,from punched tape and tape reader to QWERTY keyboards and command lines,from graphic user interface and mouse to multi-touch *** way we communicate with computers or devices are getting more direct and *** this paper,we give gesture mouse simulation in human–computer interface based on 3 Gear Systems using two Kinect *** Kinect sensor is the perfect device to achieve dynamic gesture tracking and pose *** hope the 3 Gear Systems can work as a mouse,to be more specific,use gestures to do click,double click and *** use Coordinate Converting Matrix and Kalman Filter to reduce the shaking caused by errors and makes the interface create a better user *** the future of human-computer interface is discussed.

关键词： Mouse simulation kinect human-machine interface gesture recognition

Seasonal Variation of Environmental Variables and Phytoplankton Community Structure and Their Relationship in Liaodong Bay of Bohai Sea,China

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Journal of Ocean University of China 2018年第4期17卷 864-878页

作者： yang guojun WU Zhongxin SONG Lun LU Xiaoqian College of Fisheries and Life Science Dalian Ocean UniversityDalian 116023China Center for Marine Ranching Engineering Science Research of Liaoning Province Dalian Ocean UniversityDalian 116023China College of Marine Science and Environment Dalian Ocean UniversityDalian 116023China Liaoning Ocean and Fisheries Science Research Institute Dalian 116023China

In this paper, systematic studies on the changes in concentrations of the environmental factors and the net-phytoplankton community, and the relationship between them in the Liaodong Bay, Bohai Sea during 2013 are presented. The PCA results showed that higher levels of nutrients and dissolved heavy metals in the river-estuary-bay system were closely related to the river runoff. Since the influences of industrial and anthropogenic activities, the Liaodong Bay coastal areas are facing a huge environmental challenge of nutrients and heavy metal pollution. Net-phytoplankton community structure showed obvious seasonal succession, among which the dominant and(or) key species were the main factors affecting community structure change and stability. Under certain environmental conditions, the dominant species and(or) key species dominated the phytoplankton community structure succession. The Bio-ENV results suggested that the seawater temperature, nutrient, Cu, Pb, Zn, and Cd in Liaodong Bay are important environmental variables that affect the phytoplankton community structure. Anthropogenic activities have significantly contributed to the changes in concentrations of environmental factors and the net-phytoplankton community structure and stability, and the relationship between them.

关键词： Liaodong Bay environmental variables eutrophication trace metals phytoplankton community ecological stability

Lithospheric structure and faulting characteristics of the Helan Mountains and Yinchuan Basin： Results of deep seismic reflection profiling

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Science China Earth Sciences 2017年第3期60卷 589-601页

作者： LIU BaoJin FENG ShaoYing JI JiFa WANG ShuaiJun ZHANG JianShi YUAN HongKe yang guojun Geophysical Exploration Center of China Earthquake Administration Zhengzhou 450002 China

The Helan Mountains and Yinchuan Basin （HM-YB） are located at the northern end of the North-South tectonic belt, and form an intraplate tectonic deformation zone in the western margin of the North China Craton （NCC）. The HM-YB has a complicated history of formation and evolution, and is tectonically active at the present day. It has played a dominant role in the complex geological structure and modem earthquake activities of the region. A 135-km-long deep seismic reflection profile across the HM-YB was acquired in early 2014, which provides detailed information of the lithospheric structure and faulting characteristics from near-surface to various depths in the region. The results show that the Moho gradually deepens from east to west in the depth range of 40-48 km along the profile. Significant differences are present in the crustal structure of different tectonic units, including in the distribution of seismic velocities, depths of intra-cmstal discontinuities and undulation pattern of the Moho. The deep seismic reflection profile further reveals distinct structural characteristics on the opposite sides of the Helan Mountains. To the east, The Yellow River fault, the eastern piedmont fault of the Helan Mountains, as well as multiple buried faults within the Yinchuan Basin are all normal faults and still active since the Quaternary. These faults have controlled the Cenozoic sedimentation of the basin, and display a ＂negative-flower＂ structure in the profile. To the west, the Bayanhaote fault and the western piedmont fault of the Helan Mountains are east-dipping thrust faults, which caused folding, thrusting, and structural deformation in the Mesozoic stratum of the Helan Mountains uplift zone. A deep-penetrating fault is identified in the western side of the Yinchuan Basin. It has a steep inclination cutting through the middle-lower crust and the Moho, and may be connected to the two groups of faults in the upper crest. This set of deep and shallow fault system con

关键词： North China Craton Deep seismic reflection profile Lithospheric structure Helan Mountains Yinchuan Basin

Effect of the exposure to suspended solids on the enzymatic activity in the bivalve Sinonovacula constricta

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Aquaculture and Fisheries 2017年第1期2卷 10-17页

作者： guojun yang Lun Song Xiaoqian Lu Nianbin Wang yang Li College of Fisheries and Life Science Dalian Ocean UniversityDalianLiaoning 116023China Liaoning Ocean and Fisheries Science Research Institute DalianLiaoning 116023China College of Applied and Technology Dalian Ocean UniversityDalianLiaoning 116023China

Aquatic animals are susceptible to sudden changes of their living environment but they adopt strategies to cope with adverse environmental *** by suspended solids,often associated with a dramatic change in the concentrations of important water-quality variables is a frequent occurrence in China's coastal waters and *** we studied the impact of suspended solids on the activities of the antioxidant enzymes superoxide dismutase(SOD)and catalase(CAT),as well as adenosine triphosphates(including Na^(+)K^(+)-ATPase,Mg^(++)-ATPase,Ca^(++)-ATPase)and H^(+)K^(+)-ATPase in the gills and visceral mass tissues of the molluscan bivalve Sinonovacula constricta exposed(4,8,12,16,20,and 24 days)to various concentrations of suspended *** results showed that the antioxidant enzymes cooperated closely to effectively scavenge superoxide anion free radicals and H2O2(which can ultimately inhibit gill activity)through the modification of SOD and/or CAT enzymatic *** activity(considered to be a sensitive indicator of toxicity)could play an effective role in the maintenance of functional integrity of the plasma membranes as well as some other intracellular *** the exposure,a decrease in the Nat K^(+)-ATPase,Mg^(++)-ATPase,and Ca^(++)-ATPase activity of the gills was observed suggesting that they were inhibited by the *** results also indicated that,from day 4 to day 16,exposure to high concentrations of suspended solids had an inhibitory effect on the activity of H^(+)-K^(+)-ATPase in the visceral mass of ***,after a period of adaptation the H^(+)-K^(+)-ATPase activity was restored to original *** results suggest that long-term exposure to high levels of suspended solids disturb osmoregulation,gastric acid secretion and digestion,cause oxidative damage,as a consequence of antioxidant enzymes inactivation which eventually damages the gills,affect the food intake and transformation,ultimatel

关键词： Suspended solids Sinonovacula constricta Antioxidant enzymes ATP ases

基于拟静力学方法的HTR-10磁轴承氦风机辅助轴承抗冲击特性研究

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核动力工程 2016年第1期37卷 152-156页

作者：杨雷杨国军时振刚清华大学核能与新能源技术研究院北京100084 先进反应堆工程与安全教育部重点实验室北京100084

对清华大学10 MW高温气冷堆(HTR-10)磁轴承氦风机辅助轴承抗冲击特性进行研究,计算立式转子跌落的冲击作用力,并采用拟静力学分析方法对辅助轴承变形量进行计算。计算结果表明:在不同转速下,立式转子跌落在一定时间后对辅助轴承作用力... 详细信息

对清华大学10 MW高温气冷堆(HTR-10)磁轴承氦风机辅助轴承抗冲击特性进行研究,计算立式转子跌落的冲击作用力,并采用拟静力学分析方法对辅助轴承变形量进行计算。计算结果表明:在不同转速下,立式转子跌落在一定时间后对辅助轴承作用力大致相同,跌落后期接触力达到仅与跌落前转子(包括转子转速、质量等)有关的恒定值;跌落后期辅助轴承变形量与该接触力有关,而辅助轴承变形量在宏观上表现为轴承系统的振动位移。因此,辅助轴承的振动位移量可作为衡量辅助轴承自身状态的参数。

关键词： HTR-10 磁轴承辅助轴承转子跌落拟静力学

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现代煤化工与绿电和绿氢耦合发展现状及展望

石油学报（石油加工） 2022年第4期38卷 995-1000页

作者：阳国军刘会友中国石化发展计划部北京100728

现代煤化工与绿电和绿氢耦合发展可以促进煤化工行业源头大幅度减少碳排放,同时也能为绿电绿氢提供大的应用场景,是中国如期实行双碳目标的重要路径。目前,现代煤化工与绿电和绿氢耦合发展还处于研发和产业化示范阶段,为促进相关产业示... 详细信息

现代煤化工与绿电和绿氢耦合发展可以促进煤化工行业源头大幅度减少碳排放,同时也能为绿电绿氢提供大的应用场景,是中国如期实行双碳目标的重要路径。目前,现代煤化工与绿电和绿氢耦合发展还处于研发和产业化示范阶段,为促进相关产业示范,尽快形成产业优势和经济优势,介绍了现代煤化工、绿电绿氢产业发展现状,分析了二者耦合发展的必要性、发展潜力及存在的问题,并就如何耦合发展提出合理的建议。

关键词：煤化工绿电绿氢耦合节能减排

DETAIL VIBRATION ANALYSIS OF MAGNETIC BEARING HELIUM FAN IN HIGH TEMPERATURE REACTOR

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DETAIL VIBRATION ANALYSIS OF MAGNETIC BEARING HELIUM FAN IN ...

考虑氯离子侵蚀下的RC桥墩时变抗震韧性分析

第十八届国际反应堆结构力学大会

作者： yang Xu guojun yang Lei Zhao Institute of Nuclear and New Energy Technology Tsinghua University

＜正＞ 1 INTRODUCTION Since the pure helium environment inside the reactor, Active Magnetic Bearing （AMB） is considered to be the best for the helium fan supported. Using AMB in such an important place, the coming problem must be solved is to know the detail rotor dynamics and vibration issue of it while the rotor length has been increased and the bearing stiffness been decreased. As most of conventional mechanical machine, this issue has to be well studied during the design stage. If the helium fan could run on 10% away from the critical speed, the risk of unexpected vibration will be well avoided, and it can fit for all the requirements as well.

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华中科技大学学报（自然科学版） 2023年第8期51卷 60-66页

作者：杨国俊叶苏李喜梅兰州理工大学土木工程学院甘肃兰州730050

为研究氯离子侵蚀对钢筋混凝土(RC)桥墩抗震韧性的影响,对服役于海洋潮汐环境中不同服役时间的桥墩进行抗震韧性分析.首先,对遭受不同时间氯离子侵蚀的RC桥墩钢筋进行强度和直径的折减;然后,结合Pushover分析结果确定不同破坏状态的损... 详细信息

为研究氯离子侵蚀对钢筋混凝土(RC)桥墩抗震韧性的影响,对服役于海洋潮汐环境中不同服役时间的桥墩进行抗震韧性分析.首先,对遭受不同时间氯离子侵蚀的RC桥墩钢筋进行强度和直径的折减;然后,结合Pushover分析结果确定不同破坏状态的损伤界限值,再运用增量动力分析(IDA)方法计算地震易损性;最后,基于地震易损性,同时考虑桥墩自身功能的退化及震后的修复,利用破坏概率对传统修复函数的韧性结果进行修正,提出了一种改进的韧性评估方法,对桥墩进行抗震韧性评估.结果表明:改进的抗震韧性评估结果与构件失效概率的趋势一致且属于合理范围之内,该方法克服了传统三种修复函数使用范围的局限性;随着服役时间的增加,当遭遇0.3g地震作用时服役40 a和50 a桥墩的抗震韧性退化幅度分别达到25.68%和35.64%,表明氯离子侵蚀对桥墩的抗震韧性有着显著影响,为桥墩抗震设计或者加固提供一定的参考依据.

关键词：氯离子侵蚀 RC桥墩地震易损性改进的韧性评估方法时变抗震韧性