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Geodesy and Geodynamics 2024年第1期15卷 13-26页

作者： xianjie li Jean-Pierre Barriot Bernard Ducarme Marania Hopuare Yidong Lou Geodesy Observatory of Tahiti University of French PolynesiaFaa'a 98702French Polynesia Catholic University of Louvain Georges Lemaître Centre for Earth and Climate Research(ELI)1348 Louvain-la-NeuveBelgium GNSS Research Center Wuhan UniversityWuhan 430079China State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan 430079China

In this study,we estimate the absolute vertical land motions at three tidal stations with collocated Global Navigation Satellite System(GNSS)receivers over French Polynesia during the period 2007-2020,and obtain,as ancillary results,estimates of the absolute changes in sea level at the same *** verify our processing approach to determining vertical motion,we first modeled vertical motion at the International GNSS Service(IGS)THTI station located in the capital island of Tahiti and compared our estimate with previous independent determinations,with a good *** obtained the following estimates for the vertical land motions at the tide gauges:Tubuai island,Austral Archipelago-0.92±0.17 mm/yr,Vairao village,Tahiti Iti:-0.49±0.39 mm/yr,Rikitea,Gambier Archipelago-0.43±0.17 mm/*** absolute variations of the sea level are:Tubuai island,Austral Archipelago 5.25±0.60 mm/yr,Vairao village,Tahiti Iti:3.62±0.52 mm/yr,Rikitea,Gambier Archipelago 1.52±0.23 mm/*** discuss these absolute values in light of the values obtained from altimetric measurements and other means in French Polynesia.

关键词： GPS Tide gauges Sea level changes Vertical land motion

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渤海油田非连续化学驱提高采收率机理

石油学报 2024年第6期45卷 988-998页

作者：张健李宜强李先杰管错陈鑫梁丹海洋油气高效开发全国重点实验室北京102209 中海油研究总院有限责任公司北京100028 中国石油大学(北京)石油工程学院北京102249

渤海水驱油田以高孔高渗疏松砂岩为主,分大段强注强采至高含水阶段非均质性进一步加剧,存在水驱及常规聚合物驱方式难以动用更多小层、持续有效扩大波及等问题。按照化学体系调驱强度的差异,分别将凝胶、弹性分散流体和聚合物定义为强... 详细信息

渤海水驱油田以高孔高渗疏松砂岩为主,分大段强注强采至高含水阶段非均质性进一步加剧,存在水驱及常规聚合物驱方式难以动用更多小层、持续有效扩大波及等问题。按照化学体系调驱强度的差异,分别将凝胶、弹性分散流体和聚合物定义为强、中、弱3级调驱体系。根据连续化学驱(持续注入单一段塞体系)过程中渗流阻力动态变化规律,结合非均质岩心有效注入压力测试研究由强、中、弱3种调驱体系组合而成的非连续化学驱(DCF)扩大波及体积的动态特征;基于微流控实验揭示其扩大波及体积的微观机理,利用并联岩心驱替实验优化了DCF段塞组合注入方式;最后通过海上油田矿场试验验证DCF提高采收率的可行性。研究结果表明,连续化学驱过程中油水两相总流度持续增加,非均质岩心中的高渗区域总流度占比增大,扩大波及体积能力受限,不同药剂体系段塞组合的DCF驱替模式可以有效解决单一段塞增阻能力不足、过强或不均匀的问题;微流控实验表明,强-弱组合和弱-强组合DCF可较连续注入单一体系分别扩大波及29.2%和14.0%;岩心驱替实验表明,中-强-弱-强-弱DCF组合方式效果较好,可以在连续聚合物驱基础上提高采收率4.41%。有效调控注采压差和持续扩大微观波及体积是非连续化学驱提高采收率的主要机理。DCF模式在渤海BZ油田2口井的先导试验受效井含水率最大降低14%,增油量为6.97×10^(4)t,控水增油效果良好。

关键词：渗流阻力非连续化学驱波及体积注采压差段塞组合

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市政道路施工中既有地下管线保护措施研究

北方建筑 2024年第3期9卷 96-99页

作者：李显杰中交一航局西南工程有限公司广西壮族自治区梧州543000

本文基于市政道路工程实例,对市政道路施工中既有地下管线保护措施进行了分析和研究,从而达到更好地保护既有管线的目的。针对不同类型的既有管道,采用经济可靠的保护方法,明晰拟建结构物与既有管线交叉分布情况,从保护方法的选择、保... 详细信息

本文基于市政道路工程实例,对市政道路施工中既有地下管线保护措施进行了分析和研究,从而达到更好地保护既有管线的目的。针对不同类型的既有管道,采用经济可靠的保护方法,明晰拟建结构物与既有管线交叉分布情况,从保护方法的选择、保护方案的确定、保护制度的建立、施工过程的管理、管道恢复的措施等方面进行阐述,有利于维护市政道路地下管道管线正常运行,延长管线的使用年限,减少项目维修成本费用。

关键词：市政道路交叉施工既有地下管线保护措施

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铀矿井降氡优势通风方式研究

辐射防护 2024年第1期44卷 80-84页

作者：李先杰张哲胡鹏华陈刚任建军刘啸晨核工业北京化工冶金研究院北京101149 核工业湖南矿冶局长沙410007

本文以矿井通风网络入风段和用风段氡析出规律为出发点,由铀矿通风降氡基本方程导出不同通风方式下铀矿降氡需风量的计算公式,并由入风段有效供风能力导出优势通风方式评价指标,给出铀矿通风降氡方式的判别方法。

关键词：铀矿通风方式降氡判别

Conformance control by a microgel in a multi-layered heterogeneous reservoir during CO_(2) enhanced oil recovery process

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Chinese Journal of Chemical Engineering 2022年第3期35卷 324-334页

作者： Zheyu liu Jian Zhang xianjie li Chunming Xu Xin Chen Bo Zhang Guang Zhao Han Zhang Yiqiang li State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing 102249China China National Offshore Oil Corporation Research Institute CNOOCBeijing 100028China School of Petroleum Engineering China University of Petroleum(East China)QingdaoShandong 266580China

Injecting CO_(2)into the underground for oil displacement and shortage is an important technique for carbon capture,utilization and storage(CCUS).One of the main problems during the CO_(2)injection is the channeling *** an effective method for the gas channeling plugging is a critical issue in the CO_(2)EOR *** this work,an acid-resistance microgel named dispersed particle gel(DPG)was characterized and its stability was tested in the CO_(2)*** microgel size selection strategies for the homogeneous and heterogeneous reservoirs were respectively investigated using the single core flooding and three parallel core flooding ***,the comparison of microgel alternate CO_(2)(MAC)injection and water alternate CO_(2)(WAC)injection in the dual core flooding experiments were presented for the investigation of the role of microgel on the conformance control in CO_(2)flooding *** results have shown that the microgel featured with ANH and CAN groups can keep its morphology after aging 7 days in the CO_(2)***,the small microgel with unobstructed migration and large microgel with good plugging efficiency for the high permeability zone were respectively featured with the higher recovery factor in homogeneous and heterogeneous conditions,which indicate they are preferred used for the oil displacement and conformance *** to WAC injection,MAC injection had a higher incremental recovery factor of 12.4%.It suggests the acid-resistance microgel would be a good candidate for the conformance control during CO_(2)flooding process.

关键词： Carbon dioxide Microgels Enhanced oil recovery Conformance control Porous media

基于熵权法的地勘集团安全生产标准化影响因素分析

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铀矿冶 2024年第1期43卷 87-92页

作者：干雨杭张谦刘啸尘李先杰核工业北京化工冶金研究院北京101149

安全生产标准化建设对于单位的安全生产管理具有重要意义。为了探究某地勘集团安全生产标准化建设的影响因素,采用熵权法对其4家下属单位安全生产标准化评审结果进行了分析。结果表明,应急管理、持续改进、检维修、生产现场和生产过程... 详细信息

安全生产标准化建设对于单位的安全生产管理具有重要意义。为了探究某地勘集团安全生产标准化建设的影响因素,采用熵权法对其4家下属单位安全生产标准化评审结果进行了分析。结果表明,应急管理、持续改进、检维修、生产现场和生产过程、职业卫生、安全警示标志是该地勘集团的安全生产标准化建设需要重点关注的影响因素,并针对这些影响因素提出了改进建议。

关键词：地质勘查安全生产标准化建设熵权法评价指标影响因素

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Highly active copper-intercalated weakly crystallized δ-MnO_(2) for low-temperature oxidation of CO in dry and humid air

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Frontiers of Environmental Science & Engineering 2024年第5期18卷 127-136页

作者： Hao Zhang Huinan li Pengyi Zhang Tingxia Hu xianjie Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Beijing Key Laboratory for Indoor Air Quality Evaluation and Control Beijing100084China Midea Corporate Research Center Foshan528311China

Copper intercalated birnessite MnO_(2)(δ-MnO_(2))with weak crystallinity and high specific surface area(421 m^(2)/g)was synthesized by a one-pot redox method and investigated for low-temperature CO *** molar ratio of Cu/Mn was as high as 0.37,which greatly weakened the Mn-O bond and created a lot of low-temperature active oxygen *** situ DRIFTS revealed strong bonding of copper ions with ***-synthesized MnO_(2)-150Cu achieved 100%conversion of 250 ppm CO in normal air(3.1 ppm H_(2)O)even at−10°C under the weight-hourly space velocity(WHSV)of 150 L/(g·h).In addition,it showed high oxygen storage capacity to oxidize CO in inert *** the concurrent moisture in air significantly inhibited CO adsorption and its conversion at ambient temperature,MnO_(2)-150Cu could stably convert CO in 1.3%moisture air at 70°C owing to its great low-temperature activity and reduced competitive adsorption of water with increased *** study discovers the excellent low-temperature activity of weakly crystallized δ-MnO_(2) induced by high content intercalated copper ions.

关键词： CO oxidation Birnessite Interlayer copper Low-temperature Oxygen storage capacity

Novel phenanthrene/bibenzyl trimers from the tubers of Bletilla striata attenuate neuroinﬂammation via inhibition of NF-κB signaling pathway

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Chinese Journal of Natural Medicines 2024年第5期22卷 441-454页

作者： SHAO Siyuan SUN Mohan MA xianjie JIANG Jianwei TIAN Jinying ZHANG Jianjun YE Fei li Shuai 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

Five novel(9,10-dihydro)phenanthrene and bibenzyl trimers,as well as two previously identified biphenanthrenes and bibenzyls,were isolated from the tubers of Bletilla *** structures were elucidated through comprehensive analyses of NMR and HRESIMS spectroscopic *** absolute configurations of these compounds were determined by calculating rotational energy barriers and comparison of experimental and calculated ECD *** 5b and 6 exhibited inhibitory effects on LPS-induced NO production in BV-2 cells,with IC_(50) values of 12.59±0.40 and 15.59±0.83μmol·L^(-1),respectively.A mechanistic study suggested that these compounds may attenuate neuroinflammation by reducing the activation of the AKT/IκB/NF-κB signaling ***,compounds 3a,6,and 7 demonstrated significant PTP1B inhibitory activities,with IC_(50) values of 1.52±0.34,1.39±0.11,and 1.78±0.01μmol·L^(-1),*** investigation revealed that compound 3a might inhibit LPS-induced PTP1B overexpression and NF-κB activation,thereby mitigating the neuroinflammatory response in BV-2 cells.

关键词： Bletilla striata Phenanthrene/bibenzyl trimer NO inhibition AKT/IκB/NF-κB signaling pathway PTP1B inhibitory effect

Effects of Shear Fracture on In-depth Profile Modification of Weak Gels

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Petroleum Science 2007年第1期4卷 55-60页

作者： li xianjie Song Xinwang Yue Xiang＇an Hou Jirui Fang lichun Zhang Huazhen Center for Enhanced Oil Recovery China University of Petroleum Beijing 102249 China Research Institute of Geological Science Shengli Oilfield Company Ltd. Sinopec Dongying Shandong 257015 China

Two sand packs were filled with fine glass beads and quartz sand respectively. The characteristics of crosslinked polymer flowing through the sand packs as well as the influence of shear fracture of porous media on the indepth profile modification of the weak gel generated from the crosslinked polymer were investigated. The results indicated that under the dynamic condition crosslinking reaction happened in both sand packs, and the weak gels in these two cases became small gel particles after water flooding. The differences were： the dynamic gelation time in the quartz sand pack was longer than that in the glass bead pack. Residual resistance factor （FRR） caused by the weak gel in the quartz sand pack was smaller than that in the glass bead pack. The weak gel became gel particles after being scoured by subsequent flood water. A weak gel with uniform apparent viscosity and sealing characteristics was generated in every part of the glass bead pack, which could not only move deeply into the sand pack but also seal the high capacity channels again when it reached the deep part. The weak gel performed in-depth profile modification in the glass bead pack, while in the quartz sand pack, the weak gel was concentrated with 100 cm from the entrance of the sand pack. When propelled by the subsequent flood water, the weak gel could move towards the deep part of the sand pack but then became tiny gel particles and could not effectively seal the high capacity channels there. The in-depth profile modification of the weak gel was very weak in the quartz sand pack. It was the shear fracture of porous media that mainly affected the properties and weakened the in-depth profile modification of the weak gel.

关键词： Weak gel shear fracture in-depth profile modification glass bead pack quartz sand pack

Design and Realization of InP/AlGaInAs MultipleQuantum Well Ring Laser

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Transactions of Tianjin University 2014年第6期20卷 402-406页

作者： Xie Sheng Guo Jing Guan Kun Mao Luhong Guo Weilian Qi lifang li xianjie School of Electronic In formation Engineering Tianjin UniversityTianjin 300072China The 13th Research Institute of China Electronic Technology Group Corporation Shijiazhuang 050051China

Using beam propagation method （BPM）, key optical design parameters of InP/AlGaInAs multiple quantumwell （MQW） ring laser were numerically analyzed. The influences of waveguide dimensions, curvature radiusand gap size on the coupling efficiency were discussed. An InP/AlGaInAs MQW ring laser with radius of 350 μm wasdesigned and realized. The experimental results show that the designed device, lasing at 1 563.2 nm with side modesuppression ratio higher than 20 dB, exhibited unidirectional bistability between the clockwise and counterclockwisemodes.

关键词： semiconductor laser multiple quantum well optical bistability AlGaInAs