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Dynamic response of mountain tunnel,bridge,and embankment along the Sichuan-Tibet transportation corridor to active fault based on model tests

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Journal of Mountain Science 2024年第1期21卷 182-199页

作者： HUANG Beixiu qiAO Sijia CHEN Xulei LI lihui qi Shengwen Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The Sichuan-Tibet transportation corridor is prone to numerous active faults and frequent strong *** extensive studies have individually explored the effect of active faults and strong earthquakes on different engineering structures,their combined effect remains *** research employed multiple physical model tests to investigate the dynamic response of various engineering structures,including tunnels,bridges,and embankments,under the simultaneous influence of cumulative earthquakes and stick-slip misalignment of an active *** prototype selected for this study was the Kanding No.2 tunnel,which crosses the Yunongxi fault zone within the Sichuan-Tibet transportation *** results demonstrated that the tunnel,bridge,and embankment exhibited amplification in response to the input seismic wave,with the amplification effect gradually decreasing as the input peak ground acceleration(PGA)*** PGAs of different engineering structures were weakened by the fault rupture ***,the misalignment of the active fault may decrease the overall stiffness of the engineering structure,leading to more severe damage,with a small contribution from seismic ***,the seismic vibration effect might be enlarged with the height of the engineering structure,and the tunnel is supposed to have a smaller PGA and lower dynamic earth pressure compared to bridges and embankments in strong earthquake zones crossing active *** findings contribute valuable insights for evaluating the dynamic response of various engineering structures crossing an active fault and provide an experimental reference for secure engineering design in the challenging conditions of the Sichuan-Tibet transportation corridor.

关键词： Dynamic response Engineering structure Sichuan-Tibet transportation corridor Active fault Earthquake Model test

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Study on Fe-Based Coating Produced by Plasma Surface Metallurgy

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材料热处理学报 2004年第5B期25卷 952-955页

作者： lihui-qi LIUBang-wu lihui-dong ZHANGLi-min LIMin SUNYu-zong ShandongUniversityofScienceandTechnology TaianChina BeijingUniversityofScienceandTechnology BeijingChina

In the paper, plasma surface metallurgy was performed using Fe-based powder on steel substrate. The microstructure and microhardness of the coating have been analyzed. On the base of orthogonal comparison tests, influences of many factors on the cracking sensibility of plasma metallurgy coating have also been studied. The results indicate that substrate and its surface condition, processing parameters and components of plasma metallurgy coating have great effects on cracking sensibility of plasma metallurgy coating. Through changing these factors, it is possible to reduce cracks and promote the applications of this technology.

关键词：等离子表面冶金显微结构显微硬度裂纹灵敏度铁涂层

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Iterative physical optics model for electromagnetic scattering and Doppler analysis

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Journal of Systems Engineering and Electronics 2016年第3期27卷 581-589页

作者： Changze Li Chuangming Tong Yan Bai lihui qi Air and Missile Defense College Air Force Engineering UniversityXi'an 710051China Military Representative Office of PLA in 786 Factory Xi'an 710051China

An iterative physical optics（IPO） model is proposed to solve extra large scale electric electromagnetic（EM） scattering from randomly rough surfaces. In order to accelerate the convergence of the IPO model, the forward-backward methodology and its modification with underrelaxation iteration are developed to simulate the rough surface scattering; the local iteration methodology and the fast far field approximation（Fa FFA） in the matrix-vector product are proposed to reduce greatly the computational complexity. These techniques make Monte Carlo simulations possible. Thus, the average Doppler spectra of backscattered signals obtained from the simulations are compared for different incident angles and sea states. In particular, the simulations show a broadening of the Doppler spectra for a more complicated sea state at a low grazing angle（LGA）.

关键词： electromagnetic(EM) scattering iterative physical optics(IPO) Doppler spectra high frequency surface wave radar(HFSWR)

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Analysis of High-Frequency EM Scattering Properties on Time-Varying Sea Surface

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Chinese Journal of Electronics 2016年第2期25卷 384-390页

作者： LI Changze TONG Chuangming qi lihui WANG Tong ZHAO Haizhou Air and Missile Defense College Air Force Engineering University Military Representative Office of PLA in 786 Factory

This paper proposes to solve the extralarge scale Electromagnetic(EM) scattering problem on a wind-driven sea surface at Low-grazing-angle(LGA) directed against a shore-based radar with an Iterative physical optics(IPO) model. Using Monte Carlo simulations,it compares the average Doppler spectra of backscattered signals at different angles and sea states. The methods are: the forward-backward methodology and its modification with under-relaxation iteration which improves convergence and stability of the IPO; the local iteration methodology and the Fast far-field approximation(Fa FFA)in the matrix-vector product which reduce the computational complexity based on the scattering characteristics of sea surface. The simulations show a broadening effect of the Doppler spectra in a more complicated sea state at LGA.

关键词： Shore-based radar Doppler spectra LGA Iterative model Forward-backward methodology

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An underwater vest containing an antioxidant MXene hydrogel for sensitive recognition of fish locomotion

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Microsystems & Nanoengineering 2024年第2期10卷 115-131页

作者： Chengxiu Yang Jiafei Hu lihui Liu Shaowei Wu Mengchun Pan Yan Liu Haomiao Wang Peisen Li qi Zhang Weicheng qiu Huihui Luo College of Intelligence Science and Technology National University of Defense TechnologyChangsha410073China

The perception of fish locomotion is important for understanding their adaptive behaviors and ethological ***,the main strategy used for extracting fish attitudes involves the use of a vision-based monitoring system,which is limited in its range of observation and cannot perform tracking for long ***,we report the use of a wearable tagging electronic device,referred to as an underwater vest,to capture the surrounding flow field disturbances triggered by swimming or momentary postural *** of these goals were achieved by integrating a pair of pseudocapacitive pressure-sensing units and a flexible circuit ***,additional conditions,such as variable hydraulic pressures and minimal changes in fish posture,require high stability and sensitivity of the sensing ***,hybrid hydrogel electrodes were developed through cross-linking MXene with holey-reduced graphene oxide nanosheets and further modification with 1-ethyl-3-methylimidazolium dicyanamide ionic liquids,which increased the interfacial capacitance and long-term interfacial activity of the ***,the sensing unit exhibited ultrahigh sensitivity(S_(max)~136,207 kPa^(−1))in an aquatic environment for 60 days and superior high-pressure resolution(10 Pa)within a wide working range of 1 ***,an underwater vest integrated with such sensing units clearly distinguished and recorded fish *** believe that the designed device may open avenues in flow field monitoring and ocean current detection and provide new insights into the development of sensitive underwater tagging.

关键词： underwater fish linking

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Microstructure and Wear Resistance of Plasma Jet Clad Ti5Si3／NiTi Composite Coating

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Chinese Physics Letters 2004年第7期21卷 1314-1316页

作者： LIUYuan-Fu HANJian-Min ZHANGGu-Ling WANGJiu-Li LIMin YANGWu-Bao LIUChi-Zi lihui-qi YANGSi-Ze 1nstituteofPhysics ChineseAcademyofSciencesBeijing100080 SchoolofMechanical ElectronicandControlEngineeringBeijingJiaotongUniversityBeijing100044 SchoolofMaterialsScienceandEngineering UniversityofScienceandTechnologyBeijingBeijing100083

A wear resistant Ti5Si3/NiTi composite coating was fabricated on a substrate of a titanium alloy by plasma jet cladding using Ni–Ti–Si elemental powder blends. The microstructure, microhardness and wear resistance of the coating were evaluated. The result shows that the plasma jet clad composite coating has a rapidly solidified microstructure consisting of blocky primary Ti5Si3 and the inter-blocky Ti5Si3/NiTi eutectics and is metallurgically bonded to the titanium substrate. The composite coating has high hardness and excellent wear resistance under the dry-sliding-wear test condition.

关键词： Titanium alloys

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Inhibition of xanthine oxidase alleviated pancreatic necrosis via HIF-1α-regulated LDHA and NLRP3 signaling pathway in acute pancreatitis

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3591-3604页

作者： Juan Rong Chenxia Han Yan Huang Yiqin Wang qi qiu Manjiangcuo Wang Shisheng Wang Rui Wang Juqin Yang Xia Li Chenggong Hu Zhiyao Chen lihui Deng Wei Huang qing Xi Dan Du West China Center of Excellence for Pancreatitis Institute of Integrated Traditional Chinese and Western MedicineWest China Hospital/West China Medical SchoolSichuan UniversityChengdu 610041China State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China Advanced Mass Spectrometry Center Research Core FacilityFrontiers Science Center for Disease-related Molecular NetworkWest China HospitalSichuan UniversityChengdu 610213China Proteomics-Metabolomics Platform Research Core FacilityInstitutes for Systems GeneticsWest China HospitalSichuan UniversityChengdu 610093China Biobank West China HospitalSichuan UniversityChengdu 610093China West China School of Nursing Sichuan UniversityChengdu 610041China Department of Critical Care Medicine West China HospitalSichuan UniversityChengdu 610041China

Acute pancreatitis(AP)is a potentially fatal condition with no targeted treatment *** inhibiting xanthine oxidase(XO)in the treatment of AP has been studied in several experimental models and clinical trials,whether XO is a target of AP and what its the main mechanism of action is remains ***,we aimed to re-evaluate whether XO is a target aggravating AP other than merely generating reactive oxygen species that trigger *** first revealed that XO expression and enzyme activity were significantly elevated in the serum and pancreas of necrotizing AP *** also found that allopurinol and febuxostat,as purine-like and non-purine XO inhibitors,respectively,exhibited protective effects against pancreatic acinar cell death in vitro and pancreatic damage in vivo at different doses and treatment time ***,we observed that conditional Xdh overexpression aggravated pancreatic necrosis and *** mechanism analysis showed that XO inhibition restored the hypoxia-inducible factor 1-alpha(HIF-1α)-regulated lactate dehydrogenase A(LDHA)and NOD-like receptor family pyrin domain containing 3(NLRP3)signaling pathways and reduced the enrichment of^(13)C_(6)-glucose to^(13)C_(3)-***,we observed that clinical circulatory XO activity was significantly elevated in severe cases and correlated with C-reactive protein levels,while pancreatic XO and urate were also increased in severe AP *** results together indicated that proper inhibition of XO might be a promising therapeutic strategy for alleviating pancreatic necrosis and preventing progression of severe AP by downregulating HIF-1α-mediated LDHA and NLRP3 signaling pathways.

关键词： Xanthine oxidase inhibitor Multi-omics HIF-1a Necrotizing acute pancreatitis Lactate Therapeutic target NLRP3 Metabolic flux

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Luminescent Properties of Nanometer Si with Embedded Structure

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Semiconductor Photonics and Technology 2004年第1期10卷 38-40页

作者： LIZhong XINHua-mei WANGqiang LIYu-guo lihui-qi SchoolofPhys.andElectron. ShandongNormalUniversityJinan250014CHN ShandongSpecialEducationSchooi Jinan250022CHN

Blue luminescence at about 431 nm is obtained from epitaxial silicon after C^+ implantation,annealing in hydrogen ambience and chemical etching *** annealed in nitrogen ambience and etched accordingly,there is a much narrower peak at about 430 *** C^+ implantation,C=O compounds are introduced into and embedded in the surface of nanometer Si formed during annealing,at last,nanometer silicon with embedded structure is formed,which contributes to the blue emission.

关键词：纳米硅嵌入式结构化学腐蚀退火离子注入

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An Experimental Analysis of Gas-Liquid Flow Breakdown in a T-Junction

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Fluid Dynamics & Materials Processing 2024年第6期20卷 1381-1392页

作者： lihui Ma Zhuo Han Wei Li Guangfeng qi Ran Cheng Yuanyuan Wang Xiangran Mi Xiaohan Zhang Yunfei Li Technical Inspection Center Sinopec Shengli Oilfield CompanyDongying257000China New Energy Development Center Sinopec Shengli Oilfield CompanyDongying257000China China National Oil and Gas Exploration and Development Company Ltd.Beijing100034China

When a gas-liquid two-phase flow(GLTPF)enters a parallel separator through a T-junction,it generally splits *** phenomenon can seriously affect the operation efficiency and safety of the equipment located *** order to investigate these aspects and,more specifically,the so-called bias phenomenon(all gas and liquid flowing to one pipe,while the other pipe is a liquid column that fluctuates up and down),laboratory experiments were carried out by using a T-junction connected to two parallel vertical ***,a GLTPF prediction model based on the principle of minimum potential energy was *** research results indicate that this model can accurately predict the GLTPF state in parallel *** boundary of the slug flow and the churn flow in the opposite pipe can be ***,according to the results,the pressure drop curves of the two-phase flow in the parallel risers are basically the same when there is no bias phenomenon,but the pressure drop in the parallel riser displays a large deviation when there is a slug flow-churn *** when the parallel riser is in a state of asymmetric flow and one of the risers produces churn flow,the two-phase flow is prone to produce the bias phenomenon.

关键词： Two-phase flow T-junction split model entrance effect mechanism model improved model

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工业互联网平台赋能企业高质量创新:价值、挑战与应对措施

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金融理论与实践 2024年第6期 16-23页

作者：熊礼慧彭琪张珑于温州大学商学院浙江温州325000

工业互联网平台作为“新基建”的核心组成部分,实现了传统基础设施与数字技术的深度融合,为推动产业升级和企业高质量创新发展注入了新的活力。通过全面分析我国工业互联网平台的发展历程,深入探讨了工业互联网平台赋能企业高质量创新... 详细信息

工业互联网平台作为“新基建”的核心组成部分,实现了传统基础设施与数字技术的深度融合,为推动产业升级和企业高质量创新发展注入了新的活力。通过全面分析我国工业互联网平台的发展历程,深入探讨了工业互联网平台赋能企业高质量创新的价值以及面临的挑战。在借鉴国外工业互联网平台发展经验的基础上,从标准建设与技术创新、数据安全与隐私保护、专业人才培养、创新商业模式等方面提出应对措施,旨在为工业互联网平台更好赋能企业高质量创新发展提供理论支持和实践指导。

关键词：工业互联网平台高质量创新产业链协同

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