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Science Bulletin 2024年第5期69卷 601-605页

作者：许晶瑶李秋立路凯李献华 State Key Laboratory of lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring(Ministry of Education) School of Geosciences and Info-PhysicsCentral South UniversityChangsha 410083China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

Lunar basalts offer key insights into the magmatic and thermal evolution of the *** constraints deduced from the Apollo and Luna mission samples,as well as lunar meteorites,had previously suggested that lunar volcanism occurred as early as ca.≥4.37 billion years ago(Ga)[1]and ceased around 2.9-2.8 Ga[2],with two major pulses occurring in 3.95-3.58 and 3.38-3.08 Ga[3].But analysis of lunar basaltic samples recently returned by the Chang’e-5 mission reveals 2-billion-year-old volcanism on the Moon,representing the youngest lunar basalts reported to date[4,5].One of the most popular hypotheses for the cause of longlived volcanism on the Moon is that the source region for young lunar volcanism was enriched in radioactive heat-producing elements[2,6].Lunar samples from 3.5 to 3.0 Ga exhibit a gradual increase in the potassium,rare-earth elements,and phosphorus(KREEP)-like component contribution[3],consistent with the radioactive heat-producing elements ***,the demonstrably non-KREEP origin for the 2-billion-year-old Chang’e-5 basalts implies a possible transition in lunar volcanism away from a KREEP-like component contribution occurred between 3.0 and 2.03 Ga[7].Therefore,studying the characteristics and origin of magmatic activity during the period from 3.0 to2.03 Ga is essential to address the timing of the possible transition and to thus extend our understanding of sustaining long-lived volcanism on the ***,this goal is currently hampered by limited available lunar materials.

关键词： magmatic origin basalt

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实时荧光定量PCR仪用于流感病毒检测的效果分析

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中国医疗器械信息 2024年第18期30卷 104-106页

作者：邱莉莉石狮市疾病预防控制中心福建泉州362700

目的:探讨流感病毒检测中应用实时荧光定量PCR仪的价值。方法:选取2022年1月~2023年12月本中心采集检测的129份急性上呼吸道感染者的咽拭子标本展开研究,采集标本后实施实时荧光PCR仪、胶体金法测定标本中流感病毒核酸,分析两种方案检... 详细信息

目的:探讨流感病毒检测中应用实时荧光定量PCR仪的价值。方法:选取2022年1月~2023年12月本中心采集检测的129份急性上呼吸道感染者的咽拭子标本展开研究,采集标本后实施实时荧光PCR仪、胶体金法测定标本中流感病毒核酸,分析两种方案检出情况、诊断效能。结果:实时荧光定量PCR仪阳性率19.38%,胶体金法阳性率为14.73%,实时荧光定量PCR仪检测阳性率高于胶体金法(P<0.05)。实时荧光定量PCR仪特异度(99.02%)、灵敏度(92.59%)、准确率(97.67%)高于胶体金法(P<0.05)。结论:在流感病毒检测中应用实时荧光定量PCR仪准确率、敏感度较高,且该方案可以迅速且有效检测出流感病毒核酸,为迅速地采取有效的疫情防控措施提供依据。

关键词：实时荧光定量PCR仪流感病毒胶体金法灵敏度准确率诊断效能

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碱式碳酸钇焙烧制备纳米Y_(2)O_(3)的工艺及动力学研究

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稀有金属与硬质合金 2024年第1期52卷 31-37页

作者：丘丽莉张魁芳刘志强广东省科学院资源利用与稀土开发研究所稀有金属分离与综合利用国家重点实验室广东省稀土开发及应用重点实验室广东广州510651 广东韶钢工程技术有限公司广东韶关512199

针对液相沉淀法制备纳米Y_(2)O_(3)粉体工艺的焙烧过程中粉体易团聚问题,以碳酸钠和碳酸氢钠混合沉淀剂沉淀获得的纳米碱式碳酸钇为对象,系统研究了其焙烧条件对Y_(2)O_(3)形貌和粒度的影响以及动力学行为。研究表明:在煅烧温度860℃、... 详细信息

针对液相沉淀法制备纳米Y_(2)O_(3)粉体工艺的焙烧过程中粉体易团聚问题,以碳酸钠和碳酸氢钠混合沉淀剂沉淀获得的纳米碱式碳酸钇为对象,系统研究了其焙烧条件对Y_(2)O_(3)形貌和粒度的影响以及动力学行为。研究表明:在煅烧温度860℃、升温速率5.375℃/min、焙烧时间1 h的条件下,得到D50=0.050μm,(D_(90)―D_(10))/(2D_(50))=0.98,分散性良好的纳米Y_(2)O_(3),其形貌与前驱体碱式碳酸钇相似。碱式碳酸钇前驱体(Y(OH)CO_(3)·H_(2)O)焙烧制备纳米Y_(2)O_(3)粉体的热分解过程分为两个阶段:第一阶段,Y(OH)CO_(3)·H_(2)O分解生成Y(OH)CO_(3),该反应过程的表观活化能E为90.23 kJ/mol,指前因子A为7.46×10^(5),反应级数n为0.75;第二阶段,Y(OH)CO_(3)分解生成Y_(2)O_(3),反应表观活化能E为236.55 kJ/mol,指前因子A为1.31×10^(11),反应级数n=0.82。

关键词：碱式碳酸钇前驱体纳米Y_(2)O_(3) 热分解焙烧动力学参数

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Major advances in microbeam analytical techniques and their applications in Earth Science

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Science Bulletin 2016年第23期61卷 1785-1787页

作者： Xian-Hua li qiu-li li State Key Laboratory of lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences College of Earth Science University of Chinese Academy of Sciences

Major breakthroughs in modem Earth Science research largely depend on innovations in observation and analytical techniques. Over the last two decades, there have been great advances in modem microbeam analytical tech- niques, which are widely used in various subject areas in the broad field of Earth Sciences. Remarkable enhancements to observation and analysis techniques at the micro- scale have significantly improved our understanding of the Earth＇s history and its many geological processes.

关键词：微束分析技术地球科学应用科学科学研究微观尺度地质过程

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Model parameters estimation of aero-engine based on hybrid optimization algorithm

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航空动力学报 2011年第7期26卷 1665-1671页

作者： li qiu-hong li Ye-bo JIANG Dian-wen (College of Energy and Power EngineeringNanjing University of Aeronautics and Astronautics Nanjing 210016 China

A hybrid optimization algorithm for the time-domain identification of multivariable,state space model for aero-engine was presented in this *** optimization procedure runs particle swarm optimization(PSO) and least squares optimization(LSO) "in series".PSO starts from an initial population and searches for the optimum solution by updating ***,it can sometimes run into a suboptimal *** LSO can start from the suboptimal solution of PSO,and get an optimum solution by conjugate gradient *** algorithm is suitable for the high-order multivariable system which has many parameters to be estimated in wide *** optimization algorithm is applied to estimate the parameters of a 4-input 4-output state variable model(SVM) for *** simulation results demonstrate the effectiveness of the proposed algorithm.

关键词： aero-engine state variable model(SVM) particle swarm optimization(PSO) least squares optimization(LSO) hybrid optimization algorithm

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Unicyclic graphs with extremal Lanzhou index

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Applied Mathematics(A Journal of Chinese Universities) 2022年第3期37卷 350-365页

作者： liU Qian-qian li qiu-li ZHANG He-ping School of Mathematics and Statistics Lanzhou UniversityLanzhou 730000China

Very recently *** et al.[8]introduced a new topological index for a molecular graph G named Lanzhou index as∑_(u∈V(G))d_(u)d^(2)_(u),where d_(u)and d_(u)denote the degree of vertex u in G and in its complement *** index Lz(G)can be expressed as(n-1)M_(1)(G)-F(G),where M_(1)(G)and F(G)denote the first Zagreb index and the forgotten index of G respectively,and n is the number of vertices in *** turns out that Lanzhou index outperforms M_(1)(G)and F(G)in predicting the logarithm of the octanol-water partition coefficient for octane and nonane *** was shown that stars and balanced double stars are the minimal and maximal trees for Lanzhou index *** this paper,we determine the unicyclic graphs and the unicyclic chemical graphs with the minimum and maximum Lanzhou indices separately.

关键词： Lanzhou index unicyclic graph extremal graph Zagreb index forgotten index

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Long-term existence of cerebral hypoxic tissue in a rat model of cerebral ischemia/reperfusion injury

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Neural Regeneration Research 2009年第5期4卷 371-376页

作者： Yidong Wang Jingrui Pan Yu qiu Xiangpen li Mei li Ying Peng Department of Neurology Second Affiliated Hospital of Sun Yat-sen University Guangzhou 510120 Guangdong Province China

BACKGROUND： Hypoxic tissue surrounding the ischemic core may represent the ischemic penumbra following cerebral infarction. However, some studies have shown that the duration of ischemic tissue is longer than previously believed. OBJECTIVE： To clarify whether cerebral hypoxic tissue could survive long-term and whether it is altered in rats following cerebral infarction; to establish an ischemiaJreperfusion model in which hypoxic tissue exists for extended periods of time. DESIGN, TIME AND SE＇I-I＇ING： A completely randomized grouping and controlled experiment was performed at the Experimental Animal Center of Sun Yat-sen University and Medical Research Center, the Second Affiliated Hospital of Sun Yat-sen University between June and December 2008. MATERIALS： 4,9-diaza-3,3,10,10-tetramethyldodecan-2, 11 -dione dioxime （BnAO）（HL91）, used as the hypoxic marker for autoradiography, was supplied by the Beijing Syncor Star Medicinal, China, and the flesh eluent Na99TcmO4 to mark HL91 was supplied by Guangzhou Medical Isotope Center of the China Institute of Atomic Energy. 2-（2-nitro-1H-imidazole-l-yl）-N-（2,2,3,3,3-pentafluoropropyl） acetamide （EF5） and its antibody ELK3-51, used as a hypoxic marker for immunofluorescence, were supplied by the University of Pennsylvania, USA. METHODS： Male Sprague Dawley rats were randomly divided into four groups： 1.5-hour ischemiaJreperfusion group （1.5 h IR）, 2-hour ischemiaJreperfusion group （2 h IR）, 3-hour ischemiaJreperfusion group （3 h IR）, and permanent ischemia （PI） group, with 21 rats in each group. The middle cerebral artery occlusion model was established using the intraluminal suture method, while reperfusion was performed by removing the suture at each observation time point. However, in the PI group, the suture was left in the artery. MAIN OUTCOME MEASURES： Area and average absorbance of fluorescence, representing hypoxic tissue, were measured by image-analysis. RESULTS： Autoradiography revealed positive hypoxia at days 1 a

关键词： hypoxia cerebral infarction autoradiography immunofluorescence EF5 99Tcm-HL91

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Hard-carbon hybrid li-ion/metal anode enabled by preferred mesoporous uniform lithium growth mechanism

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Journal of Energy Chemistry 2024年第1期88卷 252-259,I0006页

作者： Fang Yan Yan liu Yuan li Yan Wang Zicen Deng Meng li Zhenwei Zhu Aohan Zhou Ting li Jingyi qiu Gaoping Cao Shaobo Huang Biyan Wang Hao Zhang School of Chemistry and Biological Engineering University of Science and TechnologyBeijing 100083China Research Institute of Chemical Defense Beijing 100191China College of Physics and Engineering Henan University of Science and TechnologyLuoyang 471023HenanChina National Base for International Science&Technology Cooperation School of ChemistryXiangtan UniversityXiangtan 411105HunanChina Materials and Manufacturing Department Beijing University of TechnologyBeijing 100124China

To achieve high energy density in lithium batteries,the construction of lithium-ion/metal hybrid anodes is a promising *** particular,because of the anisotropy of graphite,hybrid anode formed by graphite/li metal has low transport kinetics and is easy to causes the growth of lithium dendrites and accumulation of dead li,which seriously affects the cycle life of batteries and even causes safety ***,by comparing graphite with two types of hard carbon,it was found that hybrid anode formed by hard carbon and lithium metal,possessing more disordered mesoporous structure and lithophilic groups,presents better *** indicate that the mesoporous structure provides abundant active site and storage space for dead *** the synergistic effect of this structure and lithophilic functional groups(–COOH),the reversibility of hard carbon/lithium metal hybrid anode is maintained,promoting uniform deposition of lithium metal and alleviating formation of lithium *** hybrid anode maintains a 99.5%Coulombic efficiency(CE)after 260 cycles at a specific capacity of 500 m Ah/*** work provides new insights into the hybrid anodes formed by carbon-based materials and lithium metal with high specific energy and fast charging ability.

关键词： Hard carbon/li metal hybrid anode Mesoporous structure Surface oxygen functional group Fast charging lithium batteries

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Renewed profile of the Mesozoic magmatism in Korean Peninsula: Regional correlation and broader implication for cratonic destruction in the North China Craton

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Science China Earth Sciences 2016年第12期59卷 2355-2388页

作者： ZHAI MingGuo ZHANG YanBin ZHANG XiaoHui WU Fu Yuan PENG Peng li qiu li HOU Quanlin li TieSheng ZHAO Lei Key Laboratory of Mineral Resources Institute of Geology and Geophysics Chinese Academy of Sciences State Key Laboratory of Continental Geodynamics Northwest University State Key Laboratory of lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Key Laboratory of Computational Earth Dynamics College of Earth Science University of Chinese Academy of Sciences

Widespread Mesozoic magmatism occurs in the Korean Peninsula(KP). The status quo is poles apart between the northern and southern parts in characterizing its distribution and nature, with the nearly absence of any related information in North Korea. We have the opportunity to have conducted geological investigations in North Korea and South Korea during the past ten years through international cooperation programs. This led to the revelation of a number of granitoids and related volcanic rocks and thus facilitates the comparison with those in East China and Japan. Mesozoic granitoids in the KP can be divisible into three age groups: the Triassic group with a peak age of ~220 Ma, the Jurassic one of ~190–170 Ma and the late Early Cretaceous one of ~110 Ma. The Triassic intrusions include syenite, calc-alkaline to alkaline granite and minor kimberlite in the Pyeongnam Basin of North Korea. They have been considered to form in post-orogenic settings related to the Central Asian Orogenic Belt(CAOB) or the Dabie-Sulu Orogenic Belt(DSOB). The Jurassic granitoids constitute extensive occurrence in the KP and are termed as the Daebo-period magmatism. They correlate well with coeval counterparts in NE China encompassing the northeastern part of the North China Craton(NCC) and the eastern segment of the CAOB. They commonly consist of biotite or two-mica granites and granodiorites, with some containing small dark diorite enclaves. On one hand, Early Jurassic to early Middle Jurassic magmatic rocks are rare in most areas of the NCC, whilst Middle-Late Jurassic ones are not developed in the KP. On the other hand, both NCC and KP host abundant Cretaceous granites. However, the present data revealed contrasting age peaks, with ~130–125 Ma in the NCC and ~110–105 Ma in the KP. Cretaceous granites in the KP comprise the dominant biotite granites and a few amphibole granites. The former exhibit mildly fractionated REE patterns and zircon εHf(t) values from ?15 to ?25, whereas the lat

关键词： Mesozoic granitoids Korean Peninsula Eastern China Japan Cratonic destruction

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Pediatric acute heart failure caused by endocardial fibroelastosis mimicking dilated cardiomyopathy:A case report

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World Journal of Clinical Cases 2023年第8期11卷 1771-1781页

作者： Yao-Ying Xie qiu-li li Xin-Le li Fan Yang College of Clinical Medicine Inner Mongolia Minzu UniversityTongliao 028000Inner Mongolia Autonomous RegionChina Department of Pediatric Medical Center Soochow UniversityAffiliated Hulunbuir HospitalHulunbuir 021000Inner Mongolia Autonomous RegionChina College of Medicine Shantou UniversityShantou 515063Guangdong ProvinceChina School of Medicine Shihezi UniversityShihezi 832000Xinjiang Uygur Autonomous RegionChina

BACKGROUND Endocardial fibroelastosis(EFE)is a diffuse endocardial collagen and elastin hyperplasia disease of unknown etiology,which may be accompanied by myocardial degenerative changes leading to acute or chronic heart ***,acute heart failure(AHF)without obvious associated triggers is *** to the report of endomyocardial biopsy,the diagnosis and treatment of EFE are highly susceptible to being confounded with other primary ***,we report a case of pediatric AHF caused by EFE mimicking dilated cardiomyopathy(DCM),with the aim of providing a valuable reference for clinicians to early identify and diagnose EFE-induced *** SUMMARY A 13-mo-old female child was admitted to hospital with *** X-ray demonstrated enhanced texture in both lungs and an enlarged heart *** doppler echocardiography showed an enlarged left heart with ventricular wall hypokinesis and decreased left heart *** color ultrasonography revealed a markedly enlarged *** the result of the endomyocardial biopsy report,the child was treated with a variety of resuscitative measures including nasal cannula for oxygen,intramuscular sedation with chlorpromazine and promethazine,cedilanid for cardiac contractility enhancement,and diuretic treatment with ***,the child’s endomyocardial biopsy report result was confirmed as *** the above early interventions,the child’s condition gradually stabilized and *** week later,the child was *** a 9-mo follow-up period,the child took intermittent low-dose oral digoxin with no signs of recurrence or exacerbation of the heart *** Our report suggests that EFE-induced pediatric AHF may present in children over 1 year of age without any apparent precipitants,and that the associated clinical presentations are grossly similar to that of pediatric ***,it is still possible to be diagnosed effectively on the basis of the compr

关键词： Endocardial fibroelastosis Dilated cardiomyopathy Pediatric Acute heart failure Early identification and diagnosis

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