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MAGiC技术诊断新生儿高胆红素血症

中国医学影像技术 2024年第4期40卷 508-513页

作者：刘畅闫瑞芳谢北辰任继鹏段金辉崔静威翟晓阳新乡医学院第一附属医院磁共振科河南新乡453100

目的观察MAGiC技术诊断新生儿高胆红素血症(NHB)的价值。方法前瞻性纳入33例NHB新生儿作为NHB组,以30名正常新生儿为对照组;行MAGiC序列颅脑MR扫描,记录苍白球、壳核及丘脑ROI定量值,包括T1、T2弛豫值及质子密度(PD)值,并计算苍白球/... 详细信息

目的观察MAGiC技术诊断新生儿高胆红素血症(NHB)的价值。方法前瞻性纳入33例NHB新生儿作为NHB组,以30名正常新生儿为对照组;行MAGiC序列颅脑MR扫描,记录苍白球、壳核及丘脑ROI定量值,包括T1、T2弛豫值及质子密度(PD)值,并计算苍白球/壳核定量比值。比较组间各脑区定量值及定量比值,绘制受试者工作特征曲线,计算曲线下面积(AUC)以评估诊断效能,并以Pearson相关性分析评估血清总胆红素(TSB)水平与各脑区定量值及定量比值的相关性。结果组间各脑区T1、T2及PD值差异均无统计学意义(P均>0.05);NHB组苍白球/壳核T1值比值、T2值比值均小于对照组(P均0.05)。TSB与苍白球T2值(r=-0.299,P<0.05)、苍白球/壳核T1值比值(r=-0.480,P<0.05)及苍白球/壳核T2值比值(r=-0.328,P<0.05)均呈负相关。结论以MAGiC技术获取苍白球/壳核T1值比值对于诊断NHB具有一定价值。

关键词：高胆红素血症新生儿回波平面成像

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美国能源可持续利用现状及对中国的启示

科技导报 2024年第4期42卷 6-20页

作者：胡健 Wu Sheng 邓西里孙海涛崔景伟赵路正煤炭科学研究总院北京100013 Power Environmental Energy Research Institute 美国加利福尼亚州917223 中国石油勘探开发研究院北京100083 中国煤炭科工集团重庆研究院有限公司重庆400037 中国煤炭科工集团煤炭规划总院北京100120

世界能源利用进入“清洁、低碳、可再生”的可持续发展新航道。美国在全力确保清洁能源制造和全球领先地位,保障和实现国家能源安全稳定供给中努力形成能源可持续利用结构。能源结构转型已使美国温室气体排放总量达峰后持续走低,并下降... 详细信息

世界能源利用进入“清洁、低碳、可再生”的可持续发展新航道。美国在全力确保清洁能源制造和全球领先地位,保障和实现国家能源安全稳定供给中努力形成能源可持续利用结构。能源结构转型已使美国温室气体排放总量达峰后持续走低,并下降至2000年以前水平,电力行业和交通行业碳排放震荡下降,美国可持续能源发电成本较世界其他国家偏低。美国能源可持续利用水平的提升得益于一系列政策法规、财政投资及经济市场等多方面措施的保障。美国政府的碳减排措施及各州政府的节能准则保障能源利用效率的提升;政府推动能源转型,促进清洁能源投资,并进一步推动清洁能源和能源税收减免;通过加大天然气领域的投资,促进交通领域电气化转型,以及修订车辆燃油经济性标准等措施推动可持续能源市场繁荣。美国能源的可持续利用现状显示,“能源利用过程的清洁化、能源利用类型的低碳化、能源获取方式的可再生化”为主导的能源转型方向将成为实现能源利用可持续性的发展趋势,全球可持续能源技术创新成为关键技术进步和竞争的阵地,国际能源转型过程中出现的多种困境显示,全球可持续能源利用的重要领域合作基础众多而广泛。美国与中国能源结构和能源转型中面临的形势与挑战相似,也有不同。中国能源转型将面临重要多重技术无人区,应从战略角度充分认识能源转型的长期性、复杂性和艰巨性,深入加强中国能源绿色低碳化转型的基础性、原创性、颠覆性技术的研究,推动中国能源绿色低碳安全转型。

关键词：能源化石能源可再生能源能源战略

Characterstics of seasonal variations of leaf n-alkanesand n-alkenes in modern higher plants in Qingjiang, Hubei Province, China

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Chinese Science Bulletin 2008年第17期53卷 2659-2664页

作者： cui jingwei HUANG JunHua XIE ShuCheng State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan 430074 China Key Laboratory of Biogeology and Environmental Geology of Ministry of Education China University of Geosciences Wuhan 430074 China

On the basis of GC and GC-MS analyses, the seasonal variation of leaf lipids is observed in five plant species in Qingjiang in Hubei Province. The CPI values (carbon preference index) of n-alkanes decrease gradually from May to November, though the carbon number distributions and the predominant carbon number in an individual species keep unchanged. The declined CPI values might be caused by the leaf fading, which is further supported by a comparison of the defoliated leaves with the fresh leaves. This observation infers the CPI values of n-alkanes in Quaternary sediments can be used as a tool to index the humification, and thus the climatic and the environmental conditions. The plants analyzed here show a remarkable difference in n-alkanes abundance, suggesting their differential contribution to the n-alkanes identified in sediments. The abundance and the compound species of the n-alkenes detected in the plant leaves change greatly with the seasons due to the influence of temperature, with the least compounds being identified in August.

关键词：环境变化 n-烷烃 n-烯烃平均碳链长度高等植物

Accumulation of unconventional petroleum resources and their coexistence characteristics in Chang7 shale formations of Ordos Basin in central China

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Frontiers of Earth Science 2019年第3期13卷 575-587页

作者： jingwei cui Rukai ZHU Zhiguo MAO Shixiang LI Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Mineral Shandong University of Science and TechnologyQingdao 266590China Changqing Oilfield Research Institute of Petroleum Exploration and Development CNPCXi’an 710018China

The Ordos Basin is the largest oil and gas producing basin in China, where tight oil, shale gas, oil shale, and other unconventional oil and gas resources have been found in the Chang7 subsection of the Triassic Yanchang Formation. However, the mechanism of formation and the distribution of unconventional oil and gas resources in the shale layers have not been systematically investigated until now. According to the type of unconventional oil and gas resources, main controlling factors, and the maturity, depth and abundance of organic matters, the shale oil and gas resources from Chang7 region are divided into five zones that include an outcrop-shallow oil shale zone, a middle-matured and medium-burial shale oil zone, a medium-matured and medium-burial in situ conversion process (ICP) shale oil zone, a high-maturity and deep-burial shale gas zone, and an adjacent-interbedded tight sandstone oil zone. By the distribution of resources, orderly evolution of oil and gas resources and coexistences in lacustrine shale formations have been put forward, and also a strategy of integrated exploration and development of resources in the shale formations is proposed. Overall, the outcome of this study may guide on the effective utilization of unconventional oil and gas resources in other shale formations.

关键词： shale formation oil and gas resources orderly accumulation and coexistence integrated exploration and development

High Resolution ID-TIMS Redefines the Distribution and Age of the Main Mesozoic Lacustrine Hydrocarbon Source Rocks in the Ordos Basin,China

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Acta Geologica Sinica(English Edition) 2023年第2期97卷 581-588页

作者： cui jingwei ZHU Rukai ZHANG Zhongyi Jahandar RAMEZANI LI Yang Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China Research Institute of Petroleum Exploration and Development of the Changqing Oil Field China National Petroleum CorporationXi'an 710018China Department of Earth Atmospheric and Planetary SciencesMassachusetts Institute of Technology77 Massachusetts AvenueCambridgeMassachusetts 02139USA

Using high-precision zircon U-Pb ID-TIMS geochronology,tuffs from the Chang 9 shale and the Chang 7 shale were *** tuff in the Chang 9 shale is 241.47±0.17 Ma,which falls between the top tuff age of 241.06±0.12 Ma and the bottom tuff age of 241.558±0.093 Ma in the Chang 7 *** reveal that the Chang 9 and Chang 7 shales are contemporaneous,belonging to the Ladinian stage of the Middle *** insight expands the region of the main source rock of Chang 7 to the northeast and will inform the search for the deep Chang 9 shale petroleum system,increasing the scope for exploring the Chang 7 shale system in northern *** research results clarify the relationship between the two sets of shale in the Yanchang Formation and redefine the distribution range of the Chang 7 shale in the Ordos *** the same time,it shows that there is a cross-layer problem in the stratigraphic division of the Yanchang Formation in different regions,the high-precision U-Pb dating technology providing a reference for the fine stratigraphic correlation of other continental basins in the world.

关键词： ID-TIMS high precision age redefining distribution Chang 7 shale Chang 9 shale Ordos Basin

Quantitative assessment and significance of gas washing of oil in Block 9 of the Tahe Oilfield,Tarim Basin,NW China

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Chinese Journal Of Geochemistry 2012年第2期31卷 165-173页

作者： cui jingwei WANG Tieguan WANG Chunjiang LI Meijun PetroChina Research Institute of Petroleum Exploration ＆ Development PetroChina Beijing 100083 China State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China

Some Ordovician and Triassic oils in Block 9 are characterized by light oils,which have distinctly differentiated from heavy oils in other blocks in the Tahe Oilfield,Tarim *** on the whole oil gas chroma- tograms,this paper estimates the effect of oil migration and fractionation and the amount of depletion(Q)in terms of the n-alkanes depletion *** results showed that the amount of depletion in the Ordovician reservoir is highest in the east of this block,*** depletion is 97% in Well *** amount of Q gets lower to the west,*** depletion is 53.4%in Well T115 and there is no sign of depletion in Well *** is suggested that the direction of gas washing is from the east to the *** compositions and isotopic characteristics of associated gas in Ordovician oils indicated that the gas might be derived from Cambrian source rocks of the Caohu Depression which lies to the east of Block *** contrast,no obvious depletion of n-alkanes in Triassic oils was found,suggesting that the migration pathway of natural gas has been limited to the Ordovician karst fracture system formed in the Early Hercynian *** depletions of the Ordovician and Triassic oils can reveal fault activities in this region.

关键词：塔里木盆地塔河油田定量评估气体中国西北奥陶系油藏洗油正构烷烃

78例单侧耳蜗植入术后短期康复效果真实世界研究

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中华耳科学杂志 2024年第2期22卷 201-206页

作者：崔经伟曾顺年周小慧倪逸菲施通祝道桂张劲海南博鳌超级医院耳鼻喉科琼海571400 领先仿生医疗器械(上海)有限公司

目的收集双耳重度或极重度感音神经性听力损失患者术前、术中、术后各项真实世界数据,评估单侧人工耳蜗植入对该类患者的术后短期听觉及言语康复效果,同时评估真实环境中Ultra植入体的安全性和有效性。方法选取2020年9月1日—2021年12... 详细信息

目的收集双耳重度或极重度感音神经性听力损失患者术前、术中、术后各项真实世界数据,评估单侧人工耳蜗植入对该类患者的术后短期听觉及言语康复效果,同时评估真实环境中Ultra植入体的安全性和有效性。方法选取2020年9月1日—2021年12月22日在海南博鳌超级医院接受人工耳蜗植入(植入年龄>12个月)的78例双侧重度、极重度感音神经性听力损失的患者为研究对象,对所有受试者进行术前基线评估;比较术后患者听力改善、言语能力改善、听觉功能康复,以及术中、术后随访期不良事件发生情况,于人工耳蜗开机当天、开机后1个月±7 d、开机后3个月±14 d、开机后6个月±30 d以进行临床随访,分析患者术前裸耳、术后助听听阈测试及其他各项测试结果的前后变化。结果术后开机、开机后1、3、6个月,所有患者平均助听听阈随康复时间的延长而逐渐减小,与术前裸耳比较,差异有统计学意义(<3岁:χ^(2)=1341.97,P<0.05;3~5岁:χ^(2)=912.81,P<0.05;6岁及以上:χ^(2)=1 495.36,P<0.05);言语识别率随康复时间的延长而提升,与术前裸耳比较,差异有统计学意义(3~5岁单音节:χ^(2)=239.08, P<0.05;3~5岁双音节:χ^(2)=153.66, P<0.05;6岁及以上单音节:χ^(2)=281.31, P<0.05;6岁及以上双音节:χ^(2)=152.44, P<0.05;6岁及以上语句:χ^(2)=197.06, P<0.05)。研究中未发生因器械不良反应而导致退出的不良事件。结论单侧植入人工耳蜗的双侧重度或极重度听力损失患者能够在术后短期内获得良好的听力重建效果,本研究中获得的真实世界数据能够为Ultra植入体的临床应用提供可靠证据。

关键词：真实世界数据研究特许药械人工耳蜗听觉言语康复言语识别率

Rock Types and Reservoir Characteristics of Shahejie Formation Marl in Shulu Sag, Jizhong Depression, Bohai Bay Basin

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Journal of Earth Science 2021年第4期32卷 986-997页

作者： jingwei cui Xuanjun Yuan Songtao Wu Ruifeng Zhang Song Jin Yang Li Research Institute of Petroleum Exploration and Development CNPCBeijing 100083China Key Laboratory of Oil and Gas Reservoirs CNPCBeijing 100083China National Energy Tight Oil and Gas R&D Center Beijing 100083China Exploration Department of PetroChina Huabei Company Renqiu 062552China Hebei Institute of Geological Survey Shijiazhuang 050081China

Due to the complicated lithology in the ES3 Member of the Shahejie Formation in the Shulu sag,Jizhong depression,it is difficult to classify the rock types and characterize the reservoirs at the marl *** this paper,a four-element classification method has been proposed,and seven rock types have been identified by analyzing the mineral *** primary rock types are medium-high organic carbonate rocks and medium-high organic shaly-siliceous carbonate *** the methods of field emission scanning electron microscopy,high-pressure mercury intrusion,nitrogen adsorption,and nano-CT,four types of reservoir spaces have been identified,including intra-granular pores,intergranular pores(inter-crystalline pores),organic pores,and *** combining the method of high-pressure mercury intrusion with the method of the nitrogen adsorption,the porosity of the marl has been measured,ranging from 0.73%to 5.39%.The distribution of the pore sizes is bimodal,and the pore types are dominated by micron *** this study,it has been concluded that the sag area to the east of Well ST1H is the favorable area for the development of self-sourced and self-reservoired shale *** to the results of geochemical and reservoir analysis,the III Oil Group may have sweet spot layers.

关键词： marl shale oil play rock types tight reservoir Bohai Bay Basin

High-precision Dating and Geological Significance of Chang 7 Tuff Zircon of the Triassic Yanchang Formation, Ordos Basin in Central China

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Acta Geologica Sinica(English Edition) 2019年第6期93卷 1823-1834页

作者： ZHU Rukai cui jingwei DENG Shenghui LUO Zhong LU Yuanzheng QIU Zhen Research Institute of Petroleum Exploration and Development

The Ordos Basin, as the second largest petroliferous basin of China, contains abundant oil and gas resources, oil shale, and sandstone-type uranium mineral resources. Chang 7 shale is not only the major source rock of the Mesozoic petroliferous system of the Basin, but is also crucial in determining the space-time distribution relationship of the shale section for the effective exploration and development of the Basin's oil and gas resources. To obtain a highly precise age of the shale development section, we collected tuff samples from the top and bottom profile of the Chang 7 Member, Yishi Village, Yaoqu Town, Tongchuan District, on the southern margin of the Ordos Basin and performed high-precision chemical abrasion(CA)–isotope dilution(ID)–thermal ionization mass spectrometry(TIMS) zircon U-Pb dating on the basis of extensive laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS) zircon U-Pb dating data. Our results show the precise ages of the top and bottom zircon in the Chang 7 shale to be 241.06±0.12 Ma and 241.558±0.093 Ma, respectively. We first obtained Chang 7 age data with Grade 0.1-Ma precision and then determined the age of the shale development in the Chang 7 Member to be the early-Middle Triassic Ladinian. This result is supported by paleontological evidence. The deposition duration of the Chang 7 shale is 0.5 Ma with an average deposition rate of the shale section being 5.3 cm/ka. Our research results provide time scale and basic data for further investigation of the basin–mountain coupling relation of the shale section, the sedimentary environment and volcanic ash and organic-matter-rich shale development relation, and the organism break-out and organic-matter enrichment mechanism.

关键词： Ordos Basin Chang 7 Member tuff zircon U-Pb dating