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盾构隧道施工扰动对隧道与车站地震响应的影响分析

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地震工程学报 2025年第1期47卷 69-81页

作者：加瑞杨岗郑刚李青茁许敬明天津大学建筑工程学院天津300350 天津大学滨海土木工程结构与安全教育部重点实验室天津300350

盾构隧道施工扰动会改变隧道周围土体的应力状态和力学性质,从而影响隧道与车站后期的地震响应。通过数值模拟,分析不同程度的应力状态改变和剪切模量衰减对地震时隧道周围土体、管片结构以及车站结构地震响应的影响。结果表明:(1)应力... 详细信息

盾构隧道施工扰动会改变隧道周围土体的应力状态和力学性质,从而影响隧道与车站后期的地震响应。通过数值模拟,分析不同程度的应力状态改变和剪切模量衰减对地震时隧道周围土体、管片结构以及车站结构地震响应的影响。结果表明:(1)应力状态改变程度越大(地层应力释放率越大),隧道周围土体的初始剪应力越大,隧道底部土体的剪应变越大,超静孔隙水压力越大;同时,地震引起的管片弯矩和轴力越大(应力释放率30%时地震引起的左拱肩峰值管片弯矩和轴力增量分别是应力释放率10%时的165%和527%),车站侧墙和柱的相对水平位移越大。(2)剪切模量衰减程度越大,隧道周围土体的剪切模量越小,隧道周围土体越软,隧道底部土体的剪应变越大,超静孔隙水压力越大;同时,地震引起的管片弯矩和轴力越小(模量衰减大时地震引起的左拱肩峰值管片弯矩和轴力增量分别是模量无衰减时的67%和40%),车站侧墙和柱的相对水平位移越小。因此,盾构隧道的施工扰动程度对后期隧道与车站的地震响应有明显影响,在隧道与车站的抗震设计时应考虑盾构隧道前期施工对周围土体应力状态及力学性质改变的影响。

关键词：盾构隧道施工扰动应力状态模量衰减地震响应

Sedimentary-tectonic interaction on the growth sequence architecture within the intraslope basins of deep-water Niger Delta Basin

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Journal of Palaeogeography 2023年第1期12卷 107-128页

作者： jia-jia Zhang Sheng-He Wu Guang-Yi Hu da-li Yue Cheng Chen Mei Chen Ji-Tao Yu Qi-Cong Xiong li-Qiong Wang College of Geosciences State Key Laboratory of Petroleum Resource and ProspectingChina University of Petroleum(Beijing)Beijing 102249China Research Institute China National Offshore Oil CorporationBeijing 100028China The Fourth Gas Production Plant Changqing Oilfield CompanyPetroChinaOrdos 017300Inner Mongolia Autonomous RegionChina

This paper presents a 3D seismic-based case study from the deep-water Niger Delta Basin to investigate sedimentary-tectonic interaction on growth sequence architecture within the thrust-related intraslope or piggyback basins. Gravitational contraction in the lower continental slope had yielded a series of thrust faults and associated folds in the study area, which formed several piggyback basins. These basins were filled by a suite of growth sequences with varying stratigraphic architecture. Analysis of the 3D seismic data recognized three primary seismic facies types respectively as: convergent, draping and chaotic, which contain seven subtypes. These facies types are combined to form different filling successions for convergent or chaotic growth sequences. The convergent growth sequences mainly occur in the deep section of basin fills during strong gravitational deformation, and always began with convergent-baselapping strata succeeded by convergent-thinning strata, representing pond-to-bypass transition in the ponded-basin accommodation space. The chaotic growth sequences mainly occur in the shallow section of basin fills in response to weak gravitational deformation, and usually began with debris-flow deposits succeeded by channel-levee complexes, reflecting dominant erosion-bypass processes in the slope accommodation space. A dynamic fill-andspill model considering relationship between episodic sedimentation rate and structural growth rate is proposed to explain the formative mechanisms of growth strata units and associated successions. Interaction between glaciation or deglaciation and sea-level change and gravitational deformation history are suggested to be the factor which resulted in the complex stratal stacking patterns, including progradational or retrogradational stacking patterns within convergent growth sequences, and progradational stacking patterns within chaotic growth sequences.

关键词： Intraslope basin Gravitational deformation Growth sequence Stratigraphic architecture Niger Delta Basin

Metagenomic Analysis of Environmental Samples from Wildlife Rescue Station at Poyang Lake, China

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Biomedical and Environmental Sciences 2023年第7期36卷 595-603页

作者： liU jia li Xi Yan SONG Wen Tao ZENG Xiao Xu li Hui YANG Lei WANG da Yan National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China Nanchang Center for disease prevention and control Nanchang 330038JiangxiChina

Objective To improve the understanding of the virome and bacterial microbiome in the wildlife rescue station of Poyang Lake,*** Ten smear samples were collected in March *** sequencing was performed to delineate bacterial and viral *** analysis was performed using the Kraken2 and Bracken methods.A maximum-likelihood tree was constructed based on the RNA-dependent RNA polymerase(RdRp)region of *** We identified 363 bacterial and 6 viral families.A significant difference in microbial and viral abundance was found between samples S01–S09 and *** S01–S09,members of Flavobacteriia and Gammaproteobacteria were the most prevalent,while in S10,the most prevalent bacteria class was *** S01–S09,members of Myoviridae and Herelleviridae were the most prevalent,while the dominant virus family of S10 was *** full genome of the pigeon mesivirus-like virus(NC-BM-233)was recovered from S10 and contained an open reading frame of 8,124 *** showed the best hit to the pigeon mesivirus 2 polyprotein,with 84.10%amino acid *** analysis showed that RdRp clustered into Megrivirus *** This study provides an initial assessment of the bacteria and viruses in the cage-smeared samples,broadens our knowledge of viral and bacterial diversity,and is a way to discover potential pathogens in wild birds .

关键词： Metagenomics Virome Megrivirus B Picornaviridae Poyang Lake Wildlife Rescue Station Wild Bird

顶空固相微萃取/气相色谱法快速萃取-解吸土壤中7种芳香族化合物

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分析测试学报 2025年第1期44卷 172-179页

作者：李丙阳王钊陈佳邱洪灯新疆师范大学化学化工学院新疆乌鲁木齐830000 中国科学院兰州化学物理研究所甘肃省天然药物重点实验室甘肃兰州730000

利用氧化石墨烯功能化修饰固相微萃取(GO@SPME)针,结合气相色谱(GC)-氢火焰离子化检测器(FID)建立了检测土壤中7种挥发性芳香烃及其衍生物(包括甲苯、氯苯、乙苯、对二甲苯、邻二甲苯、硝基苯和萘)的快速萃取和解吸策略。考察了萃取液... 详细信息

利用氧化石墨烯功能化修饰固相微萃取(GO@SPME)针,结合气相色谱(GC)-氢火焰离子化检测器(FID)建立了检测土壤中7种挥发性芳香烃及其衍生物(包括甲苯、氯苯、乙苯、对二甲苯、邻二甲苯、硝基苯和萘)的快速萃取和解吸策略。考察了萃取液体积、搅拌速率、萃取温度、加盐量、解吸温度、萃取时间和解吸时间对目标物萃取效果的影响,确定在土壤样品中加入内标物质(氘代甲苯),经甲醇提取,顶空固相微萃取快速富集,再结合GC-FID进行检测,基质匹配内标法定量分析。在优化的实验条件下,该方法在15 s内可实现对目标物的快速萃取与解吸(萃取时间12 s,解吸时间3 s)。土壤样品中7种挥发性芳香烃及其衍生物的线性关系良好,相关系数(r^(2))均不小于0.9989,方法检出限(LOD,S/N=3)为1.71~11.60μg/g,定量下限(LOQ,S/N=10)为5.70~38.67μg/g;在3个不同加标水平(60、120、180μg/g)下的平均回收率为87.3%~109%,相对标准偏差(RSD)不大于12%。该方法前处理简单快速,成本较低,数据稳定可靠,适用于土壤样品中芳香族类化合物的快速检测。

关键词：芳香烃及其衍生物氧化石墨烯顶空固相微萃取气相色谱法快速萃取-解吸策略土壤

Two-dimensional ballistic transistors for advanced-node integrated circuits

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National Science Review 2024年第3期11卷 9-10页

作者： jia li Xidong Duan Hunan Provincial Key Laboratory of Two-Dimensional Materials State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University

As the feature size of metal-oxide-semiconductor-field-effect-transistors(MOSFETs) in integrated circuits(ICs)is reduced to sub-10-nm, the traditional channel materials are plagued by enhanced scattering and short-channel effects, leading to the deterioration of switching characteristics and the increase of power consumption.

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Van der Waals epitaxy: A new way for growth of Ⅲ-nitrides

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Science China(Technological Sciences) 2020年第3期63卷 528-530页

作者： CHEN Yang jia Yu-Ping SHI Zhi-Ming SUN Xiao-Juan li da-Bing State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Inorganic semiconductor plays a key role for today’s technological progress [1–4]. Comparing with other organic semiconductors [5,6] and two-dimensional(2D) metal sulfides [7–10], Ⅲ-nitrides as direct bandgap semi... 详细信息

关键词： A new way for growth of Van der Waals epitaxy nitrides

Adsorption of 2-naphthalenesulfonic acid/sulfuric acid/sulfurous acid from aqueous solution by iron-impregnated weakly basic resin：Equilibrium and model

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Chinese Journal of Chemical Engineering 2016年第11期24卷 1522-1526页

作者： Changhai li Dongmei jia Department of Chemical Engineering Binzhou University Binzhou 256603 China Research Center of Chemical Engineering and Technology Binzhou University Binzhou 256603 China

Commercial grade weakly basic resin D301 was impregnated with iron through a simple method using ferric chloride. Experiments for single, bisolute and trinary competitive adsorption were carried out to investigate the adsorption behavior of 2-naphthalenesulfonic acid(NSA), sulfuric acid and sulfurous acid from their solution at 298 K onto the novel hybrid iron impregnated D301(Fe-D301). Adsorption affinity of NSA on Fe-D301 was found to be much higher than that of sulfuric acid, while adsorption affinity of sulfuric acid was slightly higher than that of sulfurous acid. The data of single-solute adsorption were fitted to the Langmuir model and the Freundlich adsorption model. The non-ideal competitive adsorbed model coupled with the single-solute adsorption models were used to predict the bisolute and trinary-solute competitive adsorption equilibria. The NICM coupled with the Langmuir model yields the favorable representation of the bisolute and trinary-solute competitive adsorption behavior.

关键词： 2-naphthalenesulfonic acid Hybrid iron impregnated D301 Adsorption Non-ideal competitive adsorbed model Model Equilibrium

Ultrawide-band radar imagery from multiple incoherent frequency subband measurements

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Journal of Systems Engineering and Electronics 2011年第3期22卷 398-404页

作者： Xiaojian Xu jia li School of Electronic and Information Engineering Beihang UniversityBeijing 100191P.R.China Department of Electrical Computer and Systems EngineeringRensselaer Polytechnic InstituteTroy NY12180USA

The problem of combined radar imagery from multiple sparse frequency subbands initially incoherent to each other is of practical importance for radar target discrimination.A new coherent processing technique based on probability density analysis of the subband data is proposed,which is applicable for radar imaging from measurements of two or more initially incoherent radar *** coherence parameters for both amplitude and phase are obtained by combining modern spectral analysis with probability density *** major advantage of the proposed technique lies in that it enables much more robust cohering for the sparse subband data of real-world complex targets.

关键词： radar imagery coherent processing subband spectral analysis.

Effect of near PT-symmetric potentials on nonlinear modes for higher-order generalized Ginzburg–Landau model

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Communications in Theoretical Physics 2022年第12期74卷 1-8页

作者： da lin Kai-Ru Dong jia-Rui Zhang Yu-jia Shen College of Science China Agricultural UniversityBeijing 100083China

In this paper,we study the higher-order generalized Ginzburg–Landau model which contributes to describing the propagation of optical solitons in *** means of the Hirota bilinear method,the analytical solutions are obtained and the effect of relevant parameters is *** by the near parity-time-symmetric potentials,the nonlinear modes with 5%initial random noise are numerically simulated to possess stable ***,the evolution of nonlinear modes is displayed through the adiabatical change of some *** investigation of the present work is intended as a contribution to the work for the higher-order generalized Ginzburg–Landau model.

关键词： generalized Ginzburg–Landau model parity-time symmetry stability of soliton solutions