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Scattering of plane P waves by circular-arc layered alluvial valleys: An analytical solution

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Acta Seismologica Sinica(English Edition) 2001年第2期14卷 176-195页

作者： liang jian-wen Department of Civil Engineering Tianjin University Tianjin China Department of Civil Engineering University of Southern California Los Angeles U.S.A.

An analytical solution for scattering of plane P waves by circular-arc layered alluvial valleys was derived by Fourier-Bessel series expansion technique, and the solution was utilized to analyze the effects of alluvia... 详细信息

关键词： scattering plane P waves circular-arc layered alluival valley analytical solution P315.3

Scattering of plane SH waves by a circular-arc hill with a circular tunnel

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Acta Seismologica Sinica(English Edition) 2004年第5期17卷 549-563页

作者： liang jian-wen(梁建文) LUO Hao(罗昊) Vincent W. Lee Department of Civil Engineering Tianjin UniversityTianjin300072China Department of Civil EngineeringUniversity of Southern CaliforniaLos AngelesCA 90089-2531U.S.A. Department of Civil EngineeringUniversity of Southern CaliforniaLos AngelesCA90089-2531U.S.A.

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关键词： hill tunnel scattering plane SH waves analytical solution

Data-driven simultaneous vertex and energy reconstruction for large liquid scintillator detectors

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Nuclear Science and Techniques 2023年第6期34卷 103-113页

作者： Gui-Hong Huang Wei jiang liang-jian wen Yi-Fang Wang Wu-Ming Luo School of Applied Physics and Materials Wuyi UniversityJiangmen529020China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China School of Physical Sciences University of Chinese Academy of ScienceBeijing100049China

High-precision vertex and energy reconstruction are crucial for large liquid scintillator detectors such as that at the jiangmen Underground Neutrino Observatory(JUNO),especially for the determination of neutrino mass ordering by analyzing the energy spectrum of reactor *** paper presents a data-driven method to obtain a more realistic and accurate expected PMT response of positron events in JUNO and develops a simultaneous vertex and energy reconstruction method that combines the charge and time information of *** the JUNO detector,the impact of the vertex inaccuracy on the energy resolution is approximately 0.6%.

关键词： JUNO Liquid scintillator detector Neutrino experiment Vertex reconstruction Energy reconstruction

通阳宽胸方治疗稳定型心绞痛的网络药理学机制研究

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广州中医药大学学报 2024年第2期41卷 456-462页

作者：刘文甜梁文坚刘鹏陈丽芳徐槐敏李雪娇广州中医药大学广东广州510405 广东省第二中医院广东广州510095

【目的】应用网络药理学探讨通阳宽胸方治疗稳定型心绞痛(SAP)的作用机制。【方法】利用TCMSP和HERB数据库筛选得到通阳宽胸方中的有效成分及其作用靶点,通过GeneCard数据库、TTD数据库、ETCM数据库、DrugBank数据库、PhamGkb数据库整... 详细信息

【目的】应用网络药理学探讨通阳宽胸方治疗稳定型心绞痛(SAP)的作用机制。【方法】利用TCMSP和HERB数据库筛选得到通阳宽胸方中的有效成分及其作用靶点,通过GeneCard数据库、TTD数据库、ETCM数据库、DrugBank数据库、PhamGkb数据库整理出稳定型心绞痛的治疗靶点,再将药物有效成分作用靶点和疾病靶点分别在Uniprot数据库中统一基因名。通过R软件分析,得到药物-疾病共同靶点和可视化Venn图,使用STRING数据库得到共同靶点的PPI网络并对共同靶点进行富集分析并可视化。【结果】筛选后得到了108个通阳宽胸方有效成分及其相应的915个作用靶点,得到了稳定型心绞痛相关治疗靶点2 648个,药物-疾病共同靶点548个。GO分析得到生物学过程4 357个,生物学过程(BP)3 772个、细胞组成(CC)203个、分子功能(MF)382个。KEGG分析所得通路共计199条,主要通过PI3K-AKT信号通路、cAMP信号通路、细胞凋亡、细胞衰老、流体剪切应力和动脉粥样硬化等信号通路对稳定型心绞痛进行干预。【结论】通阳宽胸方治疗SAP的潜在作用机制可能是通过β-谷甾醇、川芎咔啉碱、川陈皮素、柚皮素、槲皮素、橙皮素、山柰酚等有效成分作用于SRC、TP53、VEGFA、STAT3等关键靶点,参与调节PI3K-AKT信号通路、cAMP信号通路等途径,通过调节细胞的分裂、分化、凋亡等生物过程,提高心肌细胞对缺血缺氧的耐受,增强心肌细胞的抗损伤能力,在阻止脂质和动脉粥样硬化形成等方面发挥治疗稳定型心绞痛的作用。

关键词：通阳宽胸方稳定型心绞痛网络药理学活性成分靶点信号通路

Reinforcement learning based adaptive control for uncertain mechanical systems with asymptotic tracking

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Defence Technology（防务技术） 2024年第4期34卷 19-28页

作者： Xiang-long liang Zhi-kai Yao Yao-wen Ge jian-yong Yao School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China College of Automation&College of Artificial Intelligence Nanjing University of Post and TelecommunicationNanjing210023China

This paper mainly focuses on the development of a learning-based controller for a class of uncertain mechanical systems modeled by the Euler-Lagrange *** considered system can depict the behavior of a large class of engineering systems,such as vehicular systems,robot manipulators and *** these systems are often characterized by highly nonlinear characteristics,heavy modeling uncertainties and unknown perturbations,therefore,accurate-model-based nonlinear control approaches become *** by the challenge,a reinforcement learning(RL)adaptive control methodology based on the actor-critic framework is investigated to compensate the uncertain mechanical *** approximation inaccuracies caused by RL and the exogenous unknown disturbances are circumvented via a continuous robust integral of the sign of the error(RISE)control *** from a classical RISE control law,a tanh(·)function is utilized instead of a sign(·)function to acquire a more smooth control *** developed controller requires very little prior knowledge of the dynamic model,is robust to unknown dynamics and exogenous disturbances,and can achieve asymptotic output ***,co-simulations through ADAMS and MATLAB/Simulink on a three degrees-of-freedom(3-DOF)manipulator and experiments on a real-time electromechanical servo system are performed to verify the performance of the proposed approach.

关键词： Adaptive control Reinforcement learning Uncertain mechanical systems Asymptotic tracking

A new interacting capillary bundle model on the multiphase flow in micropores of tight rocks

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Petroleum Science 2024年第2期21卷 1099-1112页

作者： wen-Quan Deng Tian-Bo liang wen-Zhong Wang Hao Liu Jun-Lin Wu Fu-jian Zhou National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China

Surfactants are widely used in the fracturing fluid to enhance the imbibition and thus the oil recovery rate. However, current numerical models cannot capture the physics behind capillary imbibition during the wettability alteration by surfactants. Although the interacting capillary bundle(ICB) model shows potential in characterizing imbibition rates in different pores during wettability alteration, the existing ICB models neglect the influence of wettability and viscosity ratio on the imbibition behavior, making it difficult to accurately describe the oil-water imbibition behavior within the porous media. In this work,a new ICB mathematical model is established by introducing pressure balance without assuming the position of the leading front to comprehensively describe the imbibition behavior in a porous medium under different conditions, including gas-liquid spontaneous imbibition and oil-water *** the pore size distribution of a tight rock is known, this new model can predict the changes of water saturation during the displacement process in the tight rock, and also determine the imbibition rate in pores of different sizes. The water saturation profiles obtained from the new model are validated against the waterflooding simulation results from the CMG, while the imbibition rates calculated by the model are validated against the experimental observations of gas-liquid spontaneous imbibition. The good match above indicates the newly proposed model can show the water saturation profile at a macroscopic scale while capture the underlying physics of the multiphase flow in a porous medium at a microscopic scale. Simulation results obtained from this model indicate that both wettability and viscosity ratio can affect the sequence of fluid imbibition into pores of different sizes during the multiphase flow, where less-viscous wetting fluid is preferentially imbibed into larger pores while more-viscous wetting fluid tends to be imbibed into smaller pores. Fur

关键词： Imbibition Multiphase flow Tight rock Interacting capillary bundle model Wettability

A series solution for surface motion amplification due to underground group cavities:Incident P waves

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Acta Seismologica Sinica(English Edition) 2004年第3期17卷 296-307页

作者： liang jian-wen(梁建文) ZHANG Hao(张浩) Vincent W Lee Tianjin University Tianjin 300072 China Tianjin University Tianjin 300072 China University of Southern California Los Angeles CA 90089-2531 U S A

A series solution for surface motion amplification due to underground group cavities for incident plane P waves is derived by Fourier-Bessel series expansion method. It is shown that underground group cavities significantly am-plify the surface ground motion nearby. It is suggested that the effect of subways on ground motion should be con-sidered when the subways are planned and designed.

关键词： underground group cavities surface motion plane P wave scattering series solution CLC number: P315.3 Document code: A

Bi_(2)S_(3) nanofiber bunch for highly efficient CO_(2) electroreduction to formate at low overpotential

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Rare Metals 2024年第7期43卷 3391-3399页

作者： Li Wang wen-Ke Gui Shan jiang liang Wang jian-Ping Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Centre for Catalysis and Clean Energy Griffith UniversityGold Coast CampusGold CoastQLD 4222Australia

Electrochemical conversion of CO_(2) into valuable chemicals represents a promising strategy to alleviate the environmental issues caused by excessive CO_(2) levels in the *** this work,Bi_(2)S_(3) with different morphologies have been fabricated via facile hydrothermal method to investigate the CO_(2) electrochemical reduction process.

关键词： process. facile Electrochemical

The isotopic effects in the IR-multiphoton excitation of molecules with c_(2v) symmetry

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Chinese Journal of Chemistry 1993年第4期11卷 321-328页

作者： DING,Shi-liang LIU,wen-jian DENG,Cong-Hao Institute for theoretical chemistry,Shandong University,Jinan,Shandong 250100 Institute for theoretical chemistry. Shandong University Jinan Shandong 250100

Quantum dynamical calculations for the IR-multiphoton excitation of H_2O,D_2O and T_2O are presented using a generalized Hamiltonian for XY_2 *** energy spectra obtained from this Hamiltonian are in good agreement with those of the *** long time average of the transition probabilities and the isotopic effects are discussed in detail,

关键词： The isotopic effects in the IR-multiphoton excitation of molecules with c symmetry IR