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Favorable lithofacies and pore characteristics of the Permian Longtan Formation shale in the southern Sichuan Basin

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能源地球科学(英文) 2023年第3期4卷 210-219页

作者： Ya'na Chen kai Yang Wei Wu Yuran Yang Xue Yang kai ma Hangzhou Geological Research Institute PetroChinaHangzhouZhejiang310023China Earth Exploration and Information Technology Key Laboratory of Ministry of Education Chengdu University of TechnologyChengduSichuan610059China Shale Gas Research Institute of Southwest Oil&Gas Field PetroChinaChengduSichuan610000China Institute of Sedimentary Geology Chengdu University of TechnologyChengduSichuan610059China

The marine–continental transitional shale (MCTS) reservoirs of the Longtan Formation (LTF) are widely distributed in the Sichuan Basin. However, the LTF shale exhibits considerable variations in mineral composition and pore characteristics, which makes identifying the 'sweet spot'a challenging task. To address this issue, 10 samples from four typical shale gas wells in the LTF in the southern Sichuan Basin were selected and analyzed for total organic carbon (TOC) content, whole-rock composition using X-ray diffraction (XRD), low-pressure gas adsorption, and high-pressure mercury intrusion. The lithofacies distribution and pore structure of the MCTS were studied to determine the pore structural characteristics and the primary factors influencing pore formation in different types of shale lithofacies in the LTF. The lithofacies of the LTF shale in the study area can be classified into three categories: siliceous clay shale, clay shale and mixed shale. Mineral content has a significant impact on the pore characteristics, while TOC content has a minor effect on the pore volume and specific surface area of micropores and mesopores. It can be inferred that the mesopores in the MCTS are mainly related to clay mineral pores, and mineral dissolution and TOC content are not the primary factors contributing to pore formation.

关键词： Pore Characteristics Sweet spot Favor able lithofacies marine-coninental transitional shale Longtan Fomaion si chuan Basin

氯代多氟醚基磺酸对稀有鮈鲫肝脏组织损伤及其毒理学机制研究

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生态毒理学报 2024年第3期19卷 274-286页

作者：徐婵宋杰玉李进杨鸿波滕春丽马凯谢锋贵州医科大学公共卫生与健康学院环境污染与疾病监控教育部重点实验室贵阳561113 贵州省分析测试研究院贵阳550014 贵州健安德科技有限公司贵阳550016 茅台学院食品科学与工程系仁怀564507

6:2氯代多氟醚基磺酸(F-53B)作为全氟辛烷磺酸(perfluorooctane sulfonate,PFOS)的替代品,已在金属电镀行业使用了40多年,这种普遍使用导致其在环境、野生动物和人体中广泛检出,且有研究表明F-53B具有肝细胞毒性作用,但其脂毒性机制尚... 详细信息

6:2氯代多氟醚基磺酸(F-53B)作为全氟辛烷磺酸(perfluorooctane sulfonate,PFOS)的替代品,已在金属电镀行业使用了40多年,这种普遍使用导致其在环境、野生动物和人体中广泛检出,且有研究表明F-53B具有肝细胞毒性作用,但其脂毒性机制尚不明确。将5月龄稀有鮈鲫暴露于0、10和200μg·L^(-1)28 d,以蛋白质组学作为研究手段,探究F-53B对稀有鮈鲫肝脏的脂毒性效应机制。在28 d暴露后,200μg·L^(-1)处理组观察到明显的血脂异常,肝脏蛋白组分析表明与脂质代谢相关的途径受到显著影响,与对照组相比,其中10μg·L^(-1)组与脂质代谢相关的上调蛋白有19个,下调的有4个,200μg·L^(-1)组上调蛋白有15个,下调蛋白9个,共同上调蛋白12个,下调蛋白2个,涉及脂肪酸降解、脂肪酸氧化、转运途径中酶的上调。同时PPAR信号通路参与了F-53B诱导的脂质代谢紊乱,表现为对PPAR的3种亚型的蛋白表达均产生激活作用,导致成骨/成脂分化失衡。这表明F-53B可破坏PPAR信号通路,破坏稀有鮈鲫的脂质稳态,结果可为F-53B脂毒作用机制研究提供新的思路。

关键词：全氟辛烷磺酸 6:2氯代多氟醚基磺酸稀有鮈鲫脂毒性蛋白组学过氧化物酶体增殖物激活受体

基于栅极参考电压的SiC MOSFET栅极氧化物健康状态在线监测方法

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电源学报 2024年第3期22卷 248-257页

作者：于圣旭王智强辛国庆时晓洁谭令其马凯华中科技大学电气与电子工程学院武汉430074 广东电网有限责任公司电力科学研究院广州510080 中国电源学会

栅极氧化物退化是限制SiC MOSFET进一步广泛应用的关键可靠性问题。在线监测能够实时获取栅极氧化物健康状态,是提升SiC MOSFET可靠性的重要手段,因此提出一种基于栅极参考电压的SiC MOSFET栅极氧化物健康状态在线监测方法,并详细介绍... 详细信息

栅极氧化物退化是限制SiC MOSFET进一步广泛应用的关键可靠性问题。在线监测能够实时获取栅极氧化物健康状态,是提升SiC MOSFET可靠性的重要手段,因此提出一种基于栅极参考电压的SiC MOSFET栅极氧化物健康状态在线监测方法,并详细介绍了利用栅极参考电压监测栅极氧化物健康状态的基本原理;提出一种栅极参考电压在线提取电路,经脉冲测试验证可以实现在线提取,经老化试验验证可以有效监测栅极氧化物健康状态。所提电路可以集成在栅极驱动中,不会显著增加系统复杂程度。

关键词：栅极氧化物健康状态 SiC MOSFET 在线监测

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A Practical Approach to Constructing a Geological Knowledge Graph:A Case Study of Mineral Exploration Data

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地球科学学刊:英文版 2023年第5期34卷 1374-1389页

作者： Qinjun Qiu Bin Wang kai ma Hairong Lü Liufeng Tao Zhong Xie Collaborative Innovation Center of Geo-Information Technology for Smart Central Plains Zhengzhou 450046China Key Laboratory of Spatiotemporal Perception and Intelligent Processing Ministry of Natural ResourcesZhengzhou 450046China Key Laboratory of Geological Survey and Evaluation of Ministry of Education China University of GeosciencesWuhan 430074China Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering China Three Gorges UniversityYichang 443002China College of Computer and Information Technology China Three Gorges UniversityYichang 443002China Department of Automation Tsinghua UniversityBeijing 100084China

Open data initiatives have promoted governmental agencies and scientific organizations to publish data online for *** of geoscience focuses on processing georeferenced quantitative data(e.g.,rock parameters,geochemical tests,geophysical surveys and satellite imagery)for discovering new *** knowledge is the cognitive result of human knowledge of the spatial distribution,evolution and interaction patterns of geological objects or *** graphs(KGs)can formalize unstructured knowledge into structured form and have been used in supporting decision-making *** this paper,we propose a novel framework that can extract the geological knowledge graph(GKG)from public reports relating to a modelling *** on the analysis of basic questions answered by geology,we summarize and abstract geological knowledge elements and then explore a geological knowledge representation model with three levels of“geological conceptsgeological entities-geological relations”to describe semantic units of geological knowledge and their logic ***,based on the characteristics of mineral resource reports,the geological knowledge representation model oriented to“object relationships”and the hierarchical geological knowledge representation model oriented to“process relationships”are proposed with reference to the commonly used geological knowledge graph *** research in this paper can provide some implications for the formalization and structured representation of geological knowledge graphs.

关键词： mineral resource report geological knowledge knowledge graph ontology hierarchical knowledge representation model

Ontology-Based BERT Model for Automated Information Extraction from Geological Hazard Reports

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地球科学学刊:英文版 2023年第5期34卷 1390-1405页

作者： kai ma Miao Tian Yongjian Tan Qinjun Qiu Zhong Xie Rong Huang Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering China Three Gorges UniversityYichang 443002China College of Computer and Information Technology China Three Gorges UniversityYichang 443002China Hubei Engineering Technology Research Center for Farmland Environment Monitoring China Three Gorges UniversityYichang 443002China School of Computer Science China University of GeosciencesWuhan 430074China Key Laboratory of Urban Land Resources Monitoring and Simulation Ministry of Natural ResourcesShenzhen 518034China Beijing Key Laboratory of Urban Spatial Information Engineering Beijing 100045China College of Economics and management China Three Gorges UniversityYichang 443002China

Geological knowledge can provide support for knowledge discovery, knowledge inference and mineralization predictions of geological big data. Entity identification and relationship extraction from geological data description text are the key links for constructing knowledge graphs. Given the lack of publicly annotated datasets in the geology domain, this paper illustrates the construction process of geological entity datasets, defines the types of entities and interconceptual relationships by using the geological entity concept system, and completes the construction of the geological corpus. To address the shortcomings of existing language models(such as Word2vec and Glove) that cannot solve polysemous words and have a poor ability to fuse contexts, we propose a geological named entity recognition and relationship extraction model jointly with Bidirectional Encoder Representation from Transformers(BERT) pretrained language model. To effectively represent the text features, we construct a BERT-bidirectional gated recurrent unit network(BiGRU)-conditional random field(CRF)-based architecture to extract the named entities and the BERT-BiGRU-Attention-based architecture to extract the entity relations. The results show that the F1-score of the BERT-BiGRU-CRF named entity recognition model is 0.91 and the F1-score of the BERT-BiGRU-Attention relationship extraction model is 0.84, which are significant performance improvements when compared to classic language models(e.g., word2vec and Embedding from Language Models(ELMo)).

关键词： ontology BERT model name entity recognition relation extraction knowledge graph

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某磷矿采矿方法优选研究与实践

矿业研究与开发 2024年第2期44卷 6-13页

作者：马凯徐海波孙唯衡杨首亚葛永翔任高峰武汉理工大学资源与环境工程学院湖北武汉430070 湖北省地质矿业开发有限责任公司湖北武汉430030 关键非金属矿产资源绿色利用教育部重点实验室湖北武汉430070

针对当前采矿方法优选中指标权重较为主观、信息利用不充分等问题,以某磷矿为依托,提出了基于博弈论组合赋权和TOPSIS法的采矿方法优选模型。采用Rhino-Griddle方式建立回采模型,利用FLAC3D软件研究了不同采矿方法的采场应力、位移和塑... 详细信息

针对当前采矿方法优选中指标权重较为主观、信息利用不充分等问题,以某磷矿为依托,提出了基于博弈论组合赋权和TOPSIS法的采矿方法优选模型。采用Rhino-Griddle方式建立回采模型,利用FLAC3D软件研究了不同采矿方法的采场应力、位移和塑性区分布规律,得到定量的安全性指标,引入经济性指标和劳动生产率指标,运用AHP法和CRITIC法分别确定主观与客观权重,基于博弈论将主客观权重进行优化组合得到综合权重,结合TOPSIS法计算出各方案的贴近度,进而优选出适用于该磷矿的采矿方法。结果表明:方案1、方案2和方案3的相对贴近度分别为36.3%、78.1%和41.5%,方案2为最优采矿方法。实践证明,优选方案的采场生产能力提高了14.49%,矿石贫化率降低了5个百分点,矿石开采成本降低了10.74元/t。研究结果可为国内类似矿山提供一定参考。

关键词：采矿方法优选博弈论 TOPSIS 磷矿

TiO_(2)/Fe_(2)O_(3)的光催化性能及在涂料中的研究应用

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中国涂料 2024年第3期39卷 49-58页

作者：高志宏李严彭洪均马辉王冲马凤凯大厂金隅涂料有限责任公司河北省防火特种涂料技术创新中心河北廊坊065399 山东裕龙石化有限公司山东烟台265702

采用水热法合成TiO_(2)、Fe_(2)O_(3)的前聚体,并通过高温煅烧制备了TiO_(2)/Fe_(2)O_(3)异质结,通过XRD、SEM、TEM等一系列表征TiO_(2)、Fe_(2)O_(3)的形成,紫外–漫反射光谱图表明,TiO_(2)/Fe_(2)O_(3)异质结在可见光范围内吸光性能较TiO_(2)和Fe_(2)O_(3)明显红移。通过Tauc曲线、Mott-Schottky曲线理论计算得出TiO_(2)/Fe_(2)O_(3)异质结的形成,该异质结对甲基橙的180 min催化率为94%,可见光范围内表现出卓越的光催化活性。在内墙涂料中添加质量比为1∶100时对甲醛24 h光催化降解效率为89.6%,TiO_(2)/Fe_(2)O_(3)异质结在高温煅烧下形成一种优良的耐高温填料,因此在防火涂料中的应用显著增强了其阻燃抑烟性能。在防火涂料中的添加质量比为2.5∶100时,防火涂料的残炭量从35%提升至39%,环氧防火涂料9.0 mm耐火230 min,呈现出良好的防火性能,环氧涂层黏结力强,耐久性、机械性好,膨胀炭层强度高、致密性好,TiO_(2)/Fe_(2)O_(3)异质结存在还使该防火涂料具有良好的自清洁性能。

关键词： TiO_(2)/Fe_(2)O_(3)异质结可见光催化内墙涂料环氧防火涂料

sdLDL/HDL与急性STEMT合并2型糖尿病患者行急诊介入术后造影剂肾病发生的关系

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中国现代医生 2024年第20期62卷 63-67页

作者：郑迪马凯李文华李雨涵徐州医科大学附属医院心内科江苏徐州221000

目的探讨小而密低密度脂蛋白胆固醇(small dense low density lipoprotein cholesterol,sdLDL-C)与高密度脂蛋白胆固醇(high density lipoprotein cholesterol,HDL-C)两者的比值与急性ST段抬高型心肌梗死(ST segment elevation myocardial infarction,STEMI)合并2型糖尿病(type 2 diabetes mellitus,T2DM)患者行急诊介入(percutaneous coronary intervention,PCI)术后造影剂肾病(contrast nephropathy,CIN)发生的关系。方法选取2021年5月至2023年11月STEMI合并T2DM患者187例,均行急诊冠状动脉介入治疗。术后48~72h内检测患者肌酐水平,分为CIN组52例和非CIN组135例。测定所有患者血浆sdLDL-C和HDL-C水平,计算两者的比值,比较两组sdLDL-C/HDL-C的差异,并分析其与急诊介入术后造影剂肾病发生的关系。结果CIN组sdLDL-C(1.283±0.432)mmol/L高于非CIN组(0.884±0.436)mmol/L,CIN组HDL-C(0.822±0.213)mmol/L低于非CIN组(1.013±0.224)mmol/L,CIN组sdLDL-C/HDL-C(1.712±0.793)高于非CIN组(0.843±0.484),差异均有统计学意义(P<0.05)。Logistic回归分析结果表明,冠心病的危险因素中,sdLDL-C/HDL-C是STEMI合并T2DM患者急诊介入术后发生CIN的独立危险因素[OR=9.003,95%CI:3.510~23.089,P<0.001];ROC曲线分析结果显示,sdLDL-C/HDL-C预测STEMI合并T2DM患者行急诊介入治疗发生CIN的曲线下面积为0.836,最佳截断为1.159,敏感度为76.1%,特异性为83.7%。结论sdLDL-C/HDL-C与急性STEMI合并2型糖尿病患者行急诊介入术后CIN的发生密切相关,可能作为预测CIN发生风险的指标,具有临床指导意义。

关键词：小而密低密度脂蛋白胆固醇高密度脂蛋白胆固醇造影剂肾病急性ST段抬高型心肌梗死 2型糖尿病

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排桩复合土钉支护结构水平位移简化计算方法

四川建筑科学研究 2024年第4期50卷 33-39页

作者：郭院成杨武帅刘煜马锴李永辉郑州大学土木工程学院河南郑州450001 郑州市市政工程勘测设计研究院有限公司河南郑州450046

针对排桩复合土钉支护结构,基于其受力变形机理,引入了土钉钉头与排桩在相应位置处变形协调的基本假定,考虑了分步开挖施工工况,采用增量法建立了考虑施工过程影响的排桩复合土钉支护结构水平位移简化计算方法。算例及工程实例计算的对... 详细信息

针对排桩复合土钉支护结构,基于其受力变形机理,引入了土钉钉头与排桩在相应位置处变形协调的基本假定,考虑了分步开挖施工工况,采用增量法建立了考虑施工过程影响的排桩复合土钉支护结构水平位移简化计算方法。算例及工程实例计算的对比分析表明,所建立的排桩复合土钉支护结构水平位移简化计算方法具有工程适用性。

关键词：基坑工程复合支护结构水平位移增量法受力变形机理