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Application of hot spring gases to the study of active volcanoes in the Changbaishan Mountain region, Northeast China

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Chinese Journal Of Geochemistry 2009年第4期28卷 445-448页

作者： WU Chengzhi liu guoming WANG Pan Changbaishan Volcano Observatory Antu 133613 China College of Resources and Safety Engmeertng China University of Mining and Technology Beijing 100083 China

The authors reviewed the history of geochemistry involved in active volcano monitoring and analyzed the relationship between variations in volcanic gas composition observed at the Changbaishan Volcano Observatory and volcanic activities. It is concluded that both geochemical method and routine gas analysis can provide the information about volcanic activity and earthquake activity, and both of them can play an important role in predicting volcano eruption.

关键词：火山气体活火山长白山地区地球化学方法应用温泉中国东北

“Nanocompoundsite”:Nano phased polymer dispersed in inorganic matrix via covalent bonds

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Nano Research 2022年第7期15卷 6582-6589页

作者： Xiang Guo Pengfei Li guoming liu Ye Tian Zongbo Zhang Caihong Xu Lei Jiang CAS Key Laboratory of Science and Technology on High-tech Polymer Materials Institute of ChemistryChinese Academy of Sciences(ICCAS)Beijing 100190China University of Chinese Academy of Sciences(UCAS) Beijing 100049China CAS Key Laboratory of Engineering Plastics Institute of ChemistryChinese Academy of Sciences(ICCAS)Beijing 100190China Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of Sciences(TIPCCAS)Beijing 100190China Research Institute for Frontier Science Beihang UniversityBeijing 100191China

Herein we demonstrate a new strategy to construct inorganic–organic“nanocompoundsite”,i.e.,a material that nano phased polymer is dispersed in consecutive inorganic matrix via covalent bonds,which is different from the conventional nanocomposite with polymer as matrix and inorganic nanomaterials as dispersed *** a representative system,SiOx/polydimethylsiloxane(PDMS)nanocompoundsite was prepared from a polymeric precursor of perhydropolysilazane(PHPS)modified by carbohydroxyl end-capped PDMS(HOC-PDMS),through a room-temperature vacuum ultraviolet(VUV)irradiation *** adjusting HOC-PDMS/PHPS ratio below 20%,PDMS fully binds to the PHPS derived SiOx matrix via Si-O-C bond to form the inorganic-organic SiOx/PDMS nanocompoundsite(ISPN)without noticeable phase *** introduction of PDMS into ISPN renders its initial decomposition temperature increase over 110℃.The remarkable enhancement of thermal stability for PDMS is due to the restriction of terminal hydroxyl induced back-biting reaction and main chain degradation by the inorganic matrix and the covalent binding between PDMS and *** novel strategy can further extend to hydroxyl terminated PDMS,polyethylene glycol,and acrylic resin,with the initial decomposition temperature of each polymer increasing by over 110,150 and 100℃,*** importantly,the nanocompoundsite combines the characteristics of inorganic matrix and *** coating based on SiOx/PDMS nanocompoundsite exhibits good flexibility,outstanding interfacial binding strength,ultra-high hardness as well as excellent hydrophobicity.

关键词： nanocomposite nanocompoundsite inorganic-organic molecular-level confinement thermal stability

An enhanced spectral diversity coregistration method for dualpolarimetric Sentinel-1A/B TOPS data

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Geodesy and Geodynamics 2023年第5期14卷 431-437页

作者： Nan Fang Xingjun Luo Peng Shen Lei Xie guoming liu Feixiang Wei Kun Jiang Wenbin Xu Lab of Volcano and Earthquake Research School of Geosciences and Info-PhysicsCentral South UniversityChangsha 410083China Jilin Changbaishan Volcano National Observation and Research Station Institute of GeologyChina Earthquake AdministrationBeijing 100029China Institute of Geology China Earthquake AdministrationBeijing 100029China

Sentinel-1A/B data are crucial for retrieving numerical information about surface phenomena and *** of terrain observation by progressive scans(TOPS)data is a critical step in its *** data must be fundamentally co-registered with an accuracy of 0.001 ***,various decorrelation factors due to natural vegetation and seasonal effects affect the coregistration accuracy of TOPS *** paper proposed an enhanced spectral diversity coregistration method for dual-polarimetric(PolESD)Sentinel-1A/B TOPS *** PolESD method suppresses speckle noise based on a unified non-local framework in dual-pol Synthetic Aperture Radar(SAR),and extracts the phase of the optimal polarization channel from the denoised polarimetric interferometric coherency *** with the traditional ESD method developed for single-polarization data,the PolESD method can obtain more accurate coherence and phase and get more pixels for azimuth-offset *** bare areas covered with low vegetation,the number of pixels selected by PolESD is more than the Boxcar *** can also correct misregistration more effectively and eliminate phase jumps in the burst ***,PolESD will help improve the application of TOPS data in low-coherence scenarios.

关键词： Coregistration Terrain observation by progressive scans (TOPS) Enhanced spectral diversity Dual-polarization

Comprehensive understanding of glioblastoma molecular phenotypes:classification,characteristics,and transition

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Cancer Biology & Medicine 2024年第5期21卷 363-381页

作者： Can Xu Pengyu Hou Xiang Li Menglin Xiao Ziqi Zhang Ziru Li Jianglong Xu guoming liu Yanli Tan Chuan Fang School of Clinical Medicine Hebei UniversityDepartment of NeurosurgeryAffiliated Hospital of Hebei UniversityBaoding 07100China Hebei Key Laboratory of Precise Diagnosis and Treatment of Glioma Baoding 071000China School of Basic Medical Sciences Hebei UniversityBaoding 07100China Department of Pathology Affiliated Hospital of Hebei UniversityBaoding 07100China

Among central nervous system-associated malignancies,glioblastoma(GBM)is the most common and has the highest mortality *** high heterogeneity of GBM cell types and the complex tumor microenvironment frequently lead to tumor recurrence and sudden relapse in patients treated with *** precision medicine,research on GBM treatment is increasingly focusing on molecular subtyping to precisely characterize the cellular and molecular heterogeneity,as well as the refractory nature of GBM toward *** understanding of the different molecular expression patterns of GBM subtypes is *** have recently proposed tetra fractional or tripartite methods for detecting GBM molecular *** various molecular subtypes of GBM show significant differences in gene expression patterns and biological *** subtypes also exhibit high plasticity in their regulatory pathways,oncogene expression,tumor microenvironment alterations,and differential responses to standard ***,we summarize the current molecular typing scheme of GBM and the major molecular/genetic characteristics of each ***,we review the mesenchymal transition mechanisms of GBM under various regulators.

关键词： Glioblastoma molecular phenotype classification characteristic mesenchymal transition

A sustained release of BMP2 in urine-derived stemcells enhances the osteogenic differentiation and the potential of bone regeneration

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Regenerative Biomaterials 2022年第1期9卷 175-188页

作者： Shuang Wu Zhao Chen Xi Yu Xin Duan Jialei Chen guoming liu Min Gong Fei Xing Jiachen Sun Shishu Huang Zhou Xiang Department of Orthopedics Orthopedic Research InstituteWest China HospitalSichuan UniversityChengdu 610000China Rehabilitation Medicine Center West China HospitalSichuan UniversityChengdu 610000China Department of Orthopedics Affiliated Hospital of Qingdao UniversityQingdao 266000China Department of Orthopedics Hospital of Chengdu University of Traditional Chinese MedicineChengdu 610000China

Cell-based tissue engineering is one of the optimistic approaches to replace current treatments for bone ***-derived stem cells(USCs)are obtained non-invasively and become one of the promising seed cells for bone *** injectable BMP2-releasing chitosan microspheres/type I collagen hydrogel(BMP2-CSM/Col I hydrogel)was *** proliferated in a time-dependent fashion,spread with good extension and interconnected with each other in different hydrogels both for 2D and 3D ***2 was released in a sustained mode for more than 28 ***-released BMP2 increased the ALP activities and mineral depositions of USCs in 2D culture,and enhanced the expression of osteogenic genes and proteins in 3D *** vivo,the mixture of USCs and BMP2-CSM/Col I hydrogels effectively enhanced bone regeneration,and the ratio of new bone volume to total bone volume was 38%after 8weeks of *** results suggested that BMP2-CSM/Col I hydrogels promoted osteogenic differentiation of USCs in 2D and 3D culture in vitro and USCs provided a promising cell source for bone tissue engineering in *** such,USCs-seeded hydrogel scaffolds are regarded as an alternative approach in the repair of bone defects.

关键词： urine-derived stem cells BMP2 chitosan microspheres bone tissue engineering

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古田溪三级平板支墩坝动应力分析

水力发电学报 2000年第2期19卷 34-42页

作者：刘国明福州大学土木建筑工程学院福州350002

采用三维有限元法及时程分析法研究古田溪三级平板支墩坝的动应力问题。提出了加劲梁对支墩横向振动影响的简化计算 ,考虑了坝—水动力相互作用 ,用半无限元模拟水体、岩基的无限域 ,并研制了相应的有限元程序。利用该程序计算了顺河向... 详细信息

采用三维有限元法及时程分析法研究古田溪三级平板支墩坝的动应力问题。提出了加劲梁对支墩横向振动影响的简化计算 ,考虑了坝—水动力相互作用 ,用半无限元模拟水体、岩基的无限域 ,并研制了相应的有限元程序。利用该程序计算了顺河向及横河向地震作用支墩的动应力响应。

关键词：平板支墩坝动应力有限元法时程分析

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古田溪三级平板支墩坝动抗滑稳定分析

水利学报 2000年第1期31卷 54-59页

作者：刘国明福州大学土木建筑工程学院福建福州350002

采用三维非线性有限元法研究古田溪三级平板支墩坝动抗滑稳定性．模拟了建基面的接触非线性，混凝土、岩石假定为线弹性，采用无限元模拟水体、岩基的无限域，用静力分析法进行抗滑稳定分析，研制了相应的有限元程序．利用该程序... 详细信息

采用三维非线性有限元法研究古田溪三级平板支墩坝动抗滑稳定性．模拟了建基面的接触非线性，混凝土、岩石假定为线弹性，采用无限元模拟水体、岩基的无限域，用静力分析法进行抗滑稳定分析，研制了相应的有限元程序．利用该程序计算了古田溪三级平板支墩坝在纵向地震作用下的抗滑稳定系数随时间变化情况．本文的方法也适用于岩基上混凝土重力坝的动抗滑稳定分析．

关键词：支墩坝动抗滑稳定非线性有限元法接触

Analysis of Tianchi volcano activity in Changbai Mountain,NE China

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Global Geology 2011年第1期14卷 44-53页

作者： liu guoming YANG Jingkui WANG Lijuan SUN Jicai Changbaishan Tianchi Volcano Observatory Antu 133613 Jilin China Seismological Bureau of Jilin Province Changchun 130022 China

Changbaishan volcano is the largest potential eruptive volcano in *** this paper,seismic activity,horizontal displacement,vertical displacement and the fluid geochemistry data acquiring from Changbaishan Tianchi Volcano Observatory(TVO) in recent years are *** authors discussed the ability for the Changbaishan volcanic seismic monitoring and active level of Changbaishan volcano in recent years based on the fundamental monitoring *** results show that Changbaishan volcano has experienced an unrest episode from 2002 to 2005,but its active level recovers to the background now.

关键词： volcano volcanic event earthquake Changbai Mountain

Double BP Q-Learning Algorithm for Local Path Planning of Mobile Robot

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Journal of Computer and Communications 2021年第6期9卷 138-157页

作者： guoming liu Caihong Li Tengteng Gao Yongdi Li Xiaopei He School of Computer Science and Technology Shandong University of Technology Zibo China

Aiming at the dimension disaster problem, poor model generalization ability and deadlock problem in special obstacles environment caused by the increase of state information in the local path planning process of mobile robot, this paper proposed a Double BP Q-learning algorithm based on the fusion of Double Q-learning algorithm and BP neural network. In order to solve the dimensional disaster problem, two BP neural network fitting value functions with the same network structure were used to replace the two Q value tables in Double Q-Learning algorithm to solve the problem that the Q value table cannot store excessive state information. By adding the mechanism of priority experience replay and using the parameter transfer to initialize the model parameters in different environments, it could accelerate the convergence rate of the algorithm, improve the learning efficiency and the generalization ability of the model. By designing specific action selection strategy in special environment, the deadlock state could be avoided and the mobile robot could reach the target point. Finally, the designed Double BP Q-learning algorithm was simulated and verified, and the probability of mobile robot reaching the target point in the parameter update process was compared with the Double Q-learning algorithm under the same condition of the planned path length. The results showed that the model trained by the improved Double BP Q-learning algorithm had a higher success rate in finding the optimal or sub-optimal path in the dense discrete environment, besides, it had stronger model generalization ability, fewer redundant sections, and could reach the target point without entering the deadlock zone in the special obstacles environment.

关键词： Mobile Robot Local Path Planning Double BP Q-Learning BP Neural Network Transfer Learning