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功角及脉冲调制双驱同步电机负载平衡控制技术研究与应用

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冶金设备管理与维修 2024年第2期42卷 55-58页

作者：周立峰范思民许广明李明远张晓阳鞍钢集团鞍千矿业有限责任公司辽宁鞍山114043

阐述了基于功角及脉冲调制双驱同步电机负载平衡控制系统的技术特点,并结合实际应用进行故障分析,制定切实可行方案,保证了设备的稳定运行,取得了较好的综合效益。

关键词：双驱同步电机正交轴绕组离合器脉冲技术负载平衡

Influences of water treatment agents on oil-water interfacial properties of oilfield produced water

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Petroleum Science 2013年第3期10卷 415-420页

作者： Guo Jixiang Cao Jingjing li mingyuan Xia Haiying Enhanced Oil Recovery Institute China University of Petroleum Engineering Technology Institute of Southwest Petroleum Branch Company

The emulsion stability of oilfield produced water is related to the oil-water interfacial film strength and the zeta potential of the oil droplets. We investigated the effects of water treatment agents （corrosion inhibitor SL-2, scale inhibitor HEDP, germicide 1227, and flocculant polyaluminium chloride PAC） on the stability of oilfield produced water. The influence of these treatment agents on oil-water interfacial properties and the mechanism of these agents acting on the oilfield produced water were studied by measuring the interfacial shear viscosity, interfacial tension and zeta electric potential. The results indicated that the scale inhibitor HEDP could increase the oil-water interfacial film strength, and it could also increase the absolute value of the zeta potential of oil droplets. HEDP played an important role in the stability of the emulsion. Polyaluminum chloride （PAC） reduced the stability of the emulsion by considerably decreasing the absolute value of the zeta potential of oil droplets. Corrosion inhibitor SL-2 and germicide 1227 could decrease the oil-water interfacial tension, whereas they had little influence on oil-water interfacial shear viscosity and oil-water interfacial electricity properties.

关键词： Water treatment agents oil-water interracial properties emulsion stability oilfield produced water

Unlocking single-atom catalysts via amorphous substrates

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Nano Research 2024年第5期17卷 3533-3546页

作者： Bohua Sun mingyuan Xu Xiaoxia li Baohong Zhang Rui Hao Xiaoyu Fan Binbin Jia Dingshun She School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China Zhengzhou Institute China University of Geosciences(Beijing)Zhengzhou 451283China College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China School of Chemistry Beihang UniversityBeijing 100191China Chinese Academy of Sciences(CAS)Key Laboratory of Nanosystem and Hierarchy Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China National Engineering Research Center of Nonferrous Metals Materials and Products for New EnergyChina GRINM Group Co.Ltd.Beijing 100088China

Single-atom catalysts(SACs)reveal great potential for application in catalysis due to their fully exposed active *** general,single atoms(SAs)and the coordination substrates need to have strong interactions or charge transfer to ensure the atomic dispersion,which requires the selection of a suitable substrate to stabilize the target *** studies have demonstrated that amorphous materials with abundant defects and coordinatively unsaturated sites can be used as substrates for more efficient capturing SAs,further enhancing the catalytic *** this review,we discuss recent research progress of SAs loaded on amorphous substrates for enhanced catalytic ***,we summarize the commonly used amorphous substrates for stabilizing ***,we present several advanced applications of amorphous SACs in the field of catalysis,including electrocatalysis and *** then,we also clarify the synergistic mechanism between SAs and amorphous substrate on catalytic ***,we summarize the challenges with our personal views and provide a critical outlook on how amorphous SACs continue to evolve.

关键词： single-atoms amorphous substrate synthetic strategy catalysis

Application and prospects of spatial information technology in CO_(2)sequestration monitoring

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Petroleum Exploration and Development 2024年第3期51卷 727-740页

作者： LYU Weifeng li Yushu WANG mingyuan liN Qianguo JIA Ninghong JI Zemin HE Chang State Key Laboratory of Enhanced Oil and Gas Recovery Beijing 100083China Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China Institute of Porous Flow&Fluid Mechanics Chinese Academy of SciencesLangfang 065007China University of Chinese Academy of Sciences Beijing 100049China Research Institute of Carbon Neutrality Shanghai Jiao Tong UniversityShanghai 200240China

This paper systematically reviews the current applications of various spatial information technologies in CO_(2)sequestration monitoring,analyzes the challenges faced by spatial information technologies in CO_(2)sequestration monitoring,and prospects the development of spatial information technologies in CO_(2)sequestration ***,the spatial information technologies applied in CO_(2)sequestration monitoring mainly include five categories:eddy covariance method,remote sensing technology,geographic information system,Internet of Things technology,and global navigation satellite *** technologies are involved in three aspects:monitoring data acquisition,positioning and data transmission,and data management and decision *** faced by the spatial information technologies in CO_(2)sequestration monitoring include:selecting spatial information technologies that match different monitoring purposes,different platforms,and different monitoring sites;establishing effective data storage and computing capabilities to cope with the broad sources and large volumes of monitoring data;and promoting collaborative operations by interacting and validating spatial information technologies with mature monitoring *** the future,it is necessary to establish methods and standards for designing spatial information technology monitoring schemes,develop collaborative application methods for cross-scale monitoring technologies,integrate spatial information technologies with artificial intelligence and high-performance computing technologies,and accelerate the application of spatial information technologies in carbon sequestration projects in China.

关键词： CO_(2)geological sequestration CO_(2)sequestration monitoring spatial information technology CO_(2)leakage CCUS

Rheological properties of polymer micro-gel dispersions

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Petroleum Science 2009年第3期6卷 294-298页

作者： Dong Zhaoxia li Yahua lin Meiqin li mingyuan Enhanced Oil Recovery Research Center China University of Petroleum Beijing 102249 China

The influence of swelling time, temperature, NaCl concentration and polymer micro-gel concentration on rheological properties of polymer micro-gel dispersions was studied by using a HAAKE rheometer. The results showed that with increasing swelling time and NaCl concentration, the polymer micro-gel dispersions changed from a shear-thickening fluid to a Newtonian fluid. The polymer micro-gel dispersion show shear-thinning in non-saline water. At higher swelling temperature, the time of the polymer micro-gel dispersion showing shear-thickening was shorter. With increasing polymer micro-gel concentration, the dispersion changed from shear-thickening to shear-thinning.

关键词： Polymer micro-gel rheological property shear-thickening shear-thinning

Instability mechanism and control technology of soft rock roadway affected by mining and high confined water

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International Journal of Mining Science and Technology 2015年第4期25卷 573-580页

作者： li Guichen Jiang Zuohan Lv Chuangxin Huang Chao Chen Gui li mingyuan School of Mines Key Laboratory of Deep Coal Resource Mining Ministry of Education China University of Mining & Technology Huaibei Coal Mining limited Company Huaibei Pingyuan Soft Rock Engineering Company

Based on deformation and failure characteristics of the second belt conveyor roadway at level II of Zhuxianzhuang coal mine, laboratory experiments, numerical calculation and field test were adopted to analyze the composition and microstructure of mudstone, the law of mudstone hydration and its strength weakening induced by water, the characteristics of surrounding rock deformation and failure under the action of confined water. Results showed that montmorillonite clay minerals accounted for as much as 76% of mudstone, with a large number of pores existing in the microstructure. Besides, as the molecular structure of montmorillonite changed, mudstone microstructure damage occurred with the macroscopic manifestation of its rheological instability. Weakening degree of confined water on residual strength of mudstone was almost 50%. The instability mechanism of soft rock roadway caused by high confined water is that surrounding rock circulates the process of ‘‘fracture-seepage-mud ding-closed'' twice, which weakens its strength and leads to roadway instability. A combined support technology, namely the, ‘‘high-toughness sealing layer + hollow grouting cables + full-length anchoring bolts with deep borehole'' was proposed. Based on field observation, the soft rock roadway was controlled effectively, which also verified the effectiveness of new control technology for surrounding rock.

关键词：软岩巷道高承压水控制技术失稳机理残余强度微观结构不稳定性朱仙庄煤矿

Emergence of a SARS-CoV-2 Omicron Subvariant BA.2.2 with a 454-Nucleotide Genomic Deletion-Sichuan Province,China,May 10,2022

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China CDC weekly 2022年第40期4卷 904-906页

作者： Yuliang Feng Xiang Zhao Tao Luo Zhixiao Chen Huiping Yang Na Chen Xiaozhen Ma mingyuan li Weihua Zhang Sikai Jia Xun Yuan Ming Pan linlin Zhou Sichuan Center for Disease Control and Prevention Chengdu CitySichuan ProvinceChina National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina West China School of Basic Medical Sciences&Forensic Medicine Sichuan UniversityChengdu CitySichuan ProvinceChina College of Computer Science Sichuan UniversityChengdu CitySichuan ProvinceChina Guang’an Center for Disease Control and Prevention Guang’an CitySichuan ProvinceChina

On May 9,2022,3 local residents in Guang’an City,Sichuan Province,tested positive for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and were diagnosed as asymptomatic infections with coronavirus disease 2019(COVID-19)in a local outbreak,and as of May 14,a total of 20 confirmed cases and 398 asymptomatic infections were *** genome sequencing was performed directly on the nasal and throat swab specimens from the initial three asymptomatic infected individuals using the Illumina MiSeq platform(Illumina,San Diego,CA,USA).The complete genome sequences of 3 SARSCoV-2 strains,named SC1215,SC1216,and SC1217,were *** sequence of SC1217 has been deposited in the GISAID database(under the accession number EPI_ISL_12725020).

关键词： residents Whole fir

Effect of Alkali on Daqing Crude Oil/Water Interfacial Properties

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Petroleum Science 2007年第1期4卷 66-69页

作者： Guo Jixiang li mingyuan lin Meiqin Wu Zhaoliang Enhanced Oil Recovery Center China University of Petroleum Beijing 102249 China

Alkaline-surfactant-polymer （ASP） flooding using sodium hydroxide as the alkali component to enhance oil recovery in Daqing Oilfield, northeast China has been successful, but there are new problems in the treatment of produced crude. The alkali added forms stable water-in-crude oil emulsion, hence de-emulsification process is necessary to separate oil and water. The problems in enhanced oil recovery with ASP flooding were investigated in laboratory by using fractions of Daqing crude oil. The oil was separated into aliphatics, aromatics, resin and asphaltene fractions. These fractions were then mixed with an additive-free jet fuel to form model oils. The interfacial properties, such as interfacial tension and interracial pressure of the systems were also measured, which together with the molecular parameters of the fractions were all used to investigate the problems in the enhanced oil recovery. In our work, it was found that sodium hydroxide solution reacts with the acidic hydrogen in the fractions of crude oil and forms soap-like interfacially active components, which accumulate at the crude oil-water interface.

关键词： Water-in-crude oil emulsion interfacial tension interfacial pressure

Influence of surfactants used in surfactant-polymer flooding on the stability of Gudong crude oil emulsion

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Petroleum Science 2010年第2期7卷 263-267页

作者： Dong Zhaoxia lin Meiqin Wang Hao li mingyuan Enhanced Oil Recovery Research Center China University of Petroleum Beijing 102249 China

The influences of an anionic-nonionic composite surfactant and petroleum sulfonate, used in surfactant-polymer flooding in Shengli Gudong oilfield, East China, on the interfacial properties of Gudong crude model oil and synthetic formation water was studied by measuring interfacial tension, interfacial viscoelasticity and Zeta potential. The in？ uence of the surfactants on the stability of Gudong water-in-oil （W/O） and oil-in-water （O/W） emulsions was evaluated by separating water from the W/O emulsion and residual oil in the aqueous phase of the O/W emulsion respectively. The results showed that the two kinds of surfactants, namely anionic-nonionic composite surfactant and petroleum sulfonate, are both able to decrease the interfacial tension between the oil phase and the aqueous phase and increase the surface potential of the oil droplets dispersed in the O/W emulsion, which can enhance the stability of the W/O and O/W crude oil emulsions. Compared with petroleum sulfonate, the anionic-nonionic composite surfactant is more interfacially active and able to enhance the strength of the interfacial film between oil and water, hence enhance the stability of the W/O and O/W emulsions more effectively.

关键词： Surfactant Gudong crude oil interfacial properties emulsion stability