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基于CDOM光谱特征的泥页岩产气特征评价

地质科技通报 2024年第4期43卷 128-140页

作者：郑晓璇田继先田聪蒋峥文杨磊贺秋芳薛红蕾西南大学地理科学学院/岩溶环境重庆市重点实验室重庆400715 中国石油勘探开发研究院北京100083 中国石油青海油田公司勘探开发研究院甘肃敦煌736202 烟台市蓬莱区农业技术推广中心山东烟台265600

泥页岩中可溶有机质(DOM)组成和可降解性是影响生物气形成的重要因素,开发简便有效的方法来评估可溶有机质的组成、官能团特征和微生物活性等,可为泥页岩生物气田产气机制分析提供关键的基础信息。采集了柴达木盆地涩探1井1219~1309 m... 详细信息

泥页岩中可溶有机质(DOM)组成和可降解性是影响生物气形成的重要因素,开发简便有效的方法来评估可溶有机质的组成、官能团特征和微生物活性等,可为泥页岩生物气田产气机制分析提供关键的基础信息。采集了柴达木盆地涩探1井1219~1309 m泥质岩心,基于有色可溶有机质(CDOM)的三维荧光(EEM)和紫外可见吸收光谱特征,分析了可溶有机质的组分、官能团特征和易降解程度,了解了产甲烷菌可利用底物的分布情况。结果表明:涩探1井岩心有机质以易降解的类色氨酸荧光组分C1和C3为主,占比70.54%;荧光组分、荧光参数HIX、BIX和吸光系数E_(253)/E_(203)、SUVA_(254)共同指示1219~1222 m和1285~1301 m2个层位有机质腐殖化程度较低,芳香性较弱,为潜在的产气活跃层位。研究表明CDOM光谱可以作为分析泥页岩可溶有机质特征的有效方法,其结果反映了产甲烷菌可利用底物和微生物活性等特征,为烃源层系内生物产气预测提供有效的重要信息。

关键词：生物气可溶有机质(DOM) CDOM三维荧光光谱紫外-可见吸收光谱柴达木盆地泥页岩

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Local Torrential Rainfall Event within a Mei-Yu Season Mesoscale Convective System:Importance of Back-Building Processes

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Advances in Atmospheric Sciences 2024年第5期41卷 847-863页

作者： honglei ZHANG Ming xue Hangfeng SHEN Xiaofan LI Guoqing ZHAI Zhejiang Institute of Meteorological Sciences Hangzhou 310017China Center for Analysis and Prediction of Storms and School of MeteorologyUniversity of OklahomaNormanOklahoma 73072USA Department of Atmospheric Science School of Earth SciencesZhejiang UniversityHangzhou 310027China Hangzhou Weather Bureau Hangzhou 310007China

An extreme rainfall event occurred over Hangzhou,China,during the afternoon hours on 24 June *** event occurred under suitable synoptic conditions and the maximum 4-h cumulative rainfall amount was over 150 *** rainfall event had two major *** was caused by a quasi-stationary convective line,and the other by a backbuilding convective line related to the interaction of the outflow boundary from the first rainband and an existing low-level mesoscale convergence line associated with a mei-yu frontal *** rainfall event lasted 4 h,while the back-building process occurred in 2 h when the extreme rainfall center *** far,few studies have examined the back-building processes in the mei-yu season that are caused by the interaction of a mesoscale convergence line and a convective cold *** two rainbands are successfully reproduced by the Weather Research and Forecasting(WRF)model with fourlevel,two-way interactive *** the model,new cells repeatedly occur at the west side of older cells,and the backbuilding process occurs in an environment with large CAPE,a low LFC,and plenty of water *** from older cells enhance the low-level convergence that forces new *** precipitation efficiency of the back-building training cells leads to accumulated precipitation of over 150 *** experiments without evaporation of rainwater show that the convective cold pool plays an important role in the organization of the back-building process in the current extreme precipitation case.

关键词： torrential rainfall back-building processes numerical simulation trigger mechanism convergence line convective cold pool

A method to predict rockburst using temporal trend test and its application

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第3期16卷 909-923页

作者： Yarong xue Zhenlei Li Dazhao Song xueqiu He honglei Wang Chao Zhou Jianqiang Chen Aleksei Sobolev School of Civil and Resources Engineering University of Science and Technology BeijingBeijing100083China Zhong-an Academy of Safety Engineering Beijing100083China China Energy Group Xinjiang Energy Co. LtdUrumqi830027China Khabarovsk Federal Research Center of the Far Eastern Branch of the Russian Academy of Sciences(KhFRC FEB RAS) 51 Turgenev StreetKhabarovsk680000Russia

Rockbursts have become a significant hazard in underground mining,underscoring the need for a robust early warning model to ensure safety *** study presents a novel approach for rockburst prediction,integrating the Mann-Kendall trend test(MKT)and multi-indices fusion to enable real-time and quantitative assessment of rockburst *** methodology employed in this study involves the development of a comprehensive precursory index library for *** MKT is then applied to analyze the real-time trend of each index,with adherence to rockburst characterization laws serving as the warning *** employing a confusion matrix,the warning effectiveness of each index is assessed,enabling index preference ***,the integrated rockburst hazard index Q is derived through data *** results demonstrate that the proposed model achieves a warning effectiveness of 0.563 for Q,surpassing the performance of any individual ***,the model’s adaptability and scalability are enhanced through periodic updates driven by actual field monitoring data,making it suitable for complex underground working *** providing an efficient and accurate basis for decision-making,the proposed model holds great potential for the prevention and control of *** offers a valuable tool for enhancing safety measures in underground mining operations.

关键词： Rockburst Microseismicity Early warning Mann-Kendall trend test Confusion matrix Multi-indices fusion

Radiofrequency sensing systems based on emerging two-dimensional materials and devices

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International Journal of Extreme Manufacturing 2023年第3期5卷 319-340页

作者： honglei xue Wanshuo Gao Jianwei Gao Grégory F Schneider Chen Wang Wangyang Fu Key Laboratory of Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityShaw Technical Science BuildingBeijingHaidian District 100084People’s Republic of China Leiden Institute of Chemistry Leiden UniversityEinsteinweg 552333CC LeidenThe Netherlands

As one of the most promising platforms for wireless communication,radiofrequency(RF)electronics have been widely advocated for the development of sensing *** particular,monolayer and few-layer two-dimensional(2D)materials exhibiting extraordinary electrical properties not only can be integrated to improve the performance of RF circuits,but also to display exceptional sensing *** review provides an in-depth perspective of current trends and challenges in the application of 2D materials for RF biochemical sensing,including:(i)theoretical bases to achieve different sensing schemes;(ii)unique properties of 2D materials for reasoning their applications in RF sensing;(iii)developments in 2D RF sensors to facilitate the practice of biochemical sensors with ever-demanding sensitivities,as well as their potential uses in meeting the requirements and challenges of biochemical sensors in the Internet-of-Things era.

关键词： radiofrequency sensing two-dimensional materials wireless communication

Synthesis and structural characterization of Zn_3N_2 powder

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Science China(Physics,Mechanics & Astronomy) 2005年第2期48卷 201-210页

作者： ZONG Fujian1, MA honglei1, xue Chengshan2, ZHUANG Huizhao2, ZHANG Xijian1, MA Jin1, JI Feng1 & XIAO Hongdi1 1. School of Physics and Microelectronics, Shandong University, Jinan 250100, China 2. Institute of Semiconductor, Shandong Normal University, Jinan 250014, China School of Physics and Microelectronics Shandong University Jinan 250100 China Institute of Semiconductor Shandong Normal University Jinan 250014 China

Zinc nitride (Zn3N2) powder has been synthesized through the nitridation reaction of Zn powder with NH3 gas (at the flow rate of 500 ml/min) at the nitridation temperature of 600℃ for 120 min. X-ray diffraction (XRD) indicates that Zn3N2 is cubic in structure with the lattice constant being a = 0.9788 nm. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show that Zn3N2 powder has surface morphology of various types. X-ray photoelectron spectroscopy (XPS) shows the differences in chemical bonding states between Zn3N2 and ZnO, and confirms the formation of N–Zn bonds. Observation through high resolution transmission electron microscopy (HRTEM) also indicates that the computer simulation of the structure of Zn3N2 is consistent with the structural model put forward by Partin.

关键词： nitridation, Zn3N2 powder, structure, XRD, SEM, TEM, HRTEM, XPS.

Acquired immune thrombotic thrombocytopenic purpura(TTP)associated with inactivated COVID-19 vaccine CoronaVac

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Frontiers of Medicine 2024年第4期18卷 744-751页

作者： Zhangbiao Long Suyu Jiang honglei Xin Lu Zhang Ruinan Lu Fengqi Liu Yong Xu Linv Wang Jun Wang xuezhong Zhang Hui Liao Jinning Shi xue Yan Xiang Zhu Ruonan Shao Zijian Li Yilin Zhu Han Yan Jiao Wu Chao Fang Xiaodong Xi Xiaofeng Shi Department of Hematology The First Affiliated Hospital of Anhui Medical UniversityHefei230022China Department of Hematology The Second Affiliated Hospital of Nanjing Medical UniversityNanjing210003China Department of Hematology The First Affiliated Hospital of Nanjing Medical UniversityJiangsu Province HospitalNanjing210029China Department of Hematology Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjing210008China Department of Hematology The Affiliated Hospital of Nanjing University of Chinese MedicineThe First Clinical Medical College of Nanjing University of Chinese MedicineNanjing210009China Department of Hematology Zhongda Hospital of Southeast UniversityNanjing210044China Department of Hematology Nanjing First HospitalNanjing Medical UniversityNanjing210006China Department of Hematology The Air Force Hospital of Eastern Theater commandNanjing210016China Department of Hematology Jiangning Hospital Affiliated of Nanjing Medical UniversityNanjing211199China Department of Hematology Nanjing Hospital of Chinese MedicineNanjing210006China Department of Pharmacology School of Basic MedicineTongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious DiseasesHuazhong University of Science and TechnologyThe Key Laboratory for Drug Target Researches and Pharmacodynamic Evaluation of Hubei ProvinceWuhan430030China Shanghai Institute of Hematology State Key Laboratory of Medical GenomicsRuijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai200025China

Corona virus disease 2019(COVID-19)due to severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection has affected the whole *** thrombotic thrombocytopenic purpura(TTP)has been reported after administration of mRNA-or adenoviral vector-based COVID-19 vaccines,including ***2-S,BNT162b2,mRNA-1273,and ChAdOx1 ***,whether inactivated vaccines,such as CoronaVac,could cause TTP and whether the symptoms in TTPs caused by inactivated vaccines are different from previously reported cases are *** this study,two cases were *** cases developed TTP after the second CoronaVac vaccination shot,but not the *** demonstrated symptoms of fever,neurological abnormalities,renal dysfunction,thrombocytopenia,and *** patients achieved complete remission through several sessions of plasma exchanges and immune *** incidence of TTP in Nanjing area was *** number of patients with TTP was 12 in 2019,6 in 2020,16 in 2021,and 19 in *** the authors’knowledge,this report is the first report of TTP associated with inactivated COVID-19 vaccine(CoronaVac).The rarity and delayed onset may be due to the relatively milder immune response caused by the inactivated vaccines than mRNA-based *** plasma exchange is a vital treatment for CoronaVac-related TTP,similar to activated vaccine-related TTP.

关键词： thrombotic thrombocytopenia purpura(TTP) corona virus disease 2019(COVID-19) CoronaVac acute respiratory syndrome coronavirus 2(SARS-CoV-2) vaccine

6～8岁儿童龋病相关唾液蛋白组的电喷雾离子肼—串联质谱分析

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华西口腔医学杂志 2014年第3期32卷 297-302页

作者：鄢国伟黄文明薛红蕾贾玉焕杨德琴重庆医科大学附属口腔医院牙体牙髓科口腔疾病与生物医学重庆市重点实验室重庆400017

目的采用电喷雾离子肼—串联质谱分析法(ESI-MS/MS)比较高龋组和无龋组儿童唾液蛋白组,初步探索唾液蛋白组与龋病的关系,并探索龋敏感性相关的生物标志物。方法以高龋组、无龋组儿童各10名为研究对象,收集唾液样本,进行聚丙烯酰胺凝胶电... 详细信息

目的采用电喷雾离子肼—串联质谱分析法(ESI-MS/MS)比较高龋组和无龋组儿童唾液蛋白组,初步探索唾液蛋白组与龋病的关系,并探索龋敏感性相关的生物标志物。方法以高龋组、无龋组儿童各10名为研究对象,收集唾液样本,进行聚丙烯酰胺凝胶电泳(SDS-PAGE),经过滤-辅助的蛋白酶解(FASP)及液相柱色谱分析后,进行ESI-MS/MS鉴定,并对高龋唾液组和无龋唾液组组间的蛋白差异进行分析。结果高龋组蛋白量显著高于无龋组,高龋组、无龋组鉴定的多肽数分别为602、481个,分别属于286、227个蛋白。两组之间差异表达多肽数为361个,差异表达蛋白数为118个,包含基质金属蛋白酶9、黏蛋白7、乳铁蛋白、碳酸酐酶6、天青杀素、冷凝集素等。结论高龋组儿童唾液蛋白量高于无龋组,基质金属蛋白酶9、黏蛋白7、乳铁蛋白、碳酸酐酶6、天青杀素、冷凝集素等高龋组与无龋组之间差异表达蛋白的检测,为进一步探索龋敏感性相关生物蛋白标志物奠定了基础。

关键词：龋病唾液蛋白组电喷雾离子肼-串联质谱生物标志物

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具核梭杆菌在牙菌斑生物膜中的作用

国际口腔医学杂志 2013年第5期40卷 657-660页

作者：薛红蕾杨德琴遵义医学院附属口腔医院牙体牙髓病科遵义563003 重庆医科大学附属口腔医院牙体牙髓病科重庆401147

具核梭杆菌广泛存在于牙菌斑生物膜中,在生物膜的形成、演替、代谢交流及水平基因转移方面起着重要的作用。具核梭杆菌在维护口腔微生态环境动态平衡的过程中具有重要意义。本文就具核梭杆菌在牙菌斑生物膜中发挥的作用作一综述。

关键词：具核梭杆菌生物膜微生物代谢交流演替水平基因转移

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多址光纤微波频率传递技术研究

光学学报 2024年第5期44卷 36-41页

作者：鱼少少全洪雷赵文宇薛文祥王鑫张首刚中国科学院国家授时中心中国科学院时间频率基准重点实验室陕西西安710600 中国科学院大学北京100049 西安邮电大学通信与信息工程学院陕西西安710121

本文提出一种多址光纤微波频率传递技术,可以实现一个主端到多个从端的系统构架,并且支持信号中途下载功能,增强了光纤微波频率传递技术的应用范围。本文系统方案主从端采用不同的激光波长,消除了信号光寄生反射和背向散射的影响。经实... 详细信息

本文提出一种多址光纤微波频率传递技术,可以实现一个主端到多个从端的系统构架,并且支持信号中途下载功能,增强了光纤微波频率传递技术的应用范围。本文系统方案主从端采用不同的激光波长,消除了信号光寄生反射和背向散射的影响。经实验验证,多址光纤微波传递系统稳定度分别达到3.5×10^(-14)/s和1.2×10^(-17)/105s;中途下载端的稳定度分别为4.1×10^(-14)/s和6.5×10^(-17)/105s。多址光纤微波频率传递系统所实现的指标能够满足目前各种应用对微波原子频标的远距离传输需求,具有广阔的应用前景。

关键词：光纤微波频率传递微波频率锁相技术