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Ordovician reservoirs in Fuxian area:Gas accumulation patterns and their implications for the exploration of lower Paleozoic carbonates in the southern Ordos Basin

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Energy Geoscience 2024年第1期5卷 63-71页

作者： ning Gu Juntao Zhang xiaohui Jin Fei Yang Lu Liu Petroleum Exploration and Production Research Institute SINOPECBeijing102206China Huabei Oil&Gas Branch SINOPECZhengzhouHenan450000China

In recent years,the Fuxian area in the southeastern Ordos Basin has undergone significant exploration,with industrial gas flow tested in wells drilled into the Ordovician marine *** this,the gas accumulation patterns of this area are not fully understood,posing challenges for further *** analysis of geological conditions indicates that the Ordovician Majiagou Formation in this area hosts two gas plays:one found in weathering crusts and the other found in interior of the *** investigated various typical gas reservoirs in the area,focusing on differentiating the geological conditions and factors controlling gas accumulation in the weathering-crust and interior gas *** results suggest three primary gas accumulation patterns in the Majiagou Formation in the Fuxian area:(1)upper gas accumulation in weathering crusts,present in the high parts of landforms such as residual paleo-hills or buried paleo-platform(Pattern I);(2)the stereoscopic pattern with gas accumulation in both weathering crusts and strata interior,arising in high parts of landforms such as residual paleo-hills or buried paleo-platforms(Pattern II);(3)lower gas accumulation in strata interior,occurring in the upper reaches and on both sides of paleo-trenches(Pattern III).This study will serve as a geological basis for future exploration deployment in the Fuxian area.

关键词： Gas accumulation Ordovician Weathering crust play Interior play Fuxian area The ordos basin

First principle calculation of lithiation/delithiation voltage in Li-ion battery materials

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Chinese Science Bulletin 2011年第30期56卷 3229-3232页

作者： ZHU xiaohui CHEN ning LIAN Fang SONG YaPing LI Yang School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Department of Engineering Science and Materials University of Puerto Rico Mayaguez PR 00681-9044 USA

A first principle method, based on the density functional theory, was used to investigate the average voltage of lithiation/delithiation for Li-ion battery materials across 7 categories and 18 series, including LiMO 2 , LiMn 2 O 4 , LiMPO 4 , Li 2 MSiO 4 and graphite. The average voltage of lithiation/delithiation in the relevant electrode materials was obtained by comparing the total-energy difference, before and after an electrochemical reaction. The calculated values were in good agreement with experimental data. The systematic difference between the simulated and experimental values could be explained in terms of the binding energy on the surface of the lithium electrode. This type of calculation method could be applied as an easy and effective tool for predicting the potential performance of new lithiation/delithiation materials.

关键词：第一原理计算电池材料平均电压锂离子锂化 LiMn204 密度泛函理论电化学反应

Liquid-mediated Ostwald ripening of Ag-based clusters supported on oxides

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Nano Research 2024年第6期17卷 4971-4978页

作者： Conghui Liu Rongtan Li Yamei Fan Shiwen Li xiaohui Feng Lu Feng Yanxiao ning Qiang Fu School of Chemistry Dalian University of TechnologyDalian 116024China State Key Laboratory of Catalysis Chinese Academy of SciencesDalian Institute of Chemical PhysicsDalian 116023China

Reconstruction of supported nanocatalysts often occurs in gas-solid reactions and significantly affects the catalytic performance,yet it is much less explored in liquid-phase ***,we find that highly-dispersed Ag nanocatalysts,i.e.,AgOx clusters,supported on alumina,silica,and titania,can aggregate into larger Ag or Ag2O particles after immersing in liquid-phase media at room *** spontaneous aggregation of AgOx clusters in liquid water is attributed to liquid-phase Ostwald ripening through dissolution of AgOx clusters into water and subsequent redeposition to form Ag2O *** immersion into organic solvents such as ethanol leads to reduction of AgOx clusters and further growth into Ag *** work reveals that liquid-phase reaction media can induce substantial structural evolution of supported nanostructured catalysts,which should be carefully considered in liquid-solid interface catalytic reactions such as electrocatalysis,environmental catalysis,and organic synthesis in liquid phase.

关键词： Ag catalysts Ostwald ripening liquid phase media dissolution-deposition process

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危化品王国的奇妙之旅

大学化学 2024年第9期39卷 196-202页

作者：汤宏胜张咏荷王德祥宁晓辉张天龙李延李华西北大学化学与材料科学学院西安710127

实验室的化学品种类繁多,其中有一类极具危险的化学品,它们时常引发各类事故,但又在人类生活中有着十分重要的作用,这就是危险化学品。在实验室中大家总是无法避免接触这类化学品,因此认识危化品,分辨它们的危险属性,确保正确储存和规... 详细信息

实验室的化学品种类繁多,其中有一类极具危险的化学品,它们时常引发各类事故,但又在人类生活中有着十分重要的作用,这就是危险化学品。在实验室中大家总是无法避免接触这类化学品,因此认识危化品,分辨它们的危险属性,确保正确储存和规范使用至关重要。本文以和平大使淇淇的视角,带大家走进危险化学品国度里的各个部落,介绍实验室危险化学品的分类以及储存方法,让大家了解并从容面对他们,并且能够安全使用,避免实验室危险事故的发生。

关键词：实验室危险化学品分类科普

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标准地铁列车复轨架车方案研究

电力机车与城轨车辆 2023年第5期46卷 89-93页

作者：谭易成苏柯刘永强冉洪宾张艺佳宁小辉重载快捷大功率电力机车全国重点实验室中车株洲电力机车有限公司湖南株洲412001 深圳地铁置业集团有限公司广东深圳518026

针对地铁列车转向架脱轨时的复轨救援需求,文章基于四种复轨架车方案的对比结果,分析了既有标准地铁列车车体结构在“一点顶升、一点横移”方案下的可行性,并对该方案进行初步强度校核,发现车体局部位置应力超标,有发生塑性变形的风险... 详细信息

针对地铁列车转向架脱轨时的复轨救援需求,文章基于四种复轨架车方案的对比结果,分析了既有标准地铁列车车体结构在“一点顶升、一点横移”方案下的可行性,并对该方案进行初步强度校核,发现车体局部位置应力超标,有发生塑性变形的风险。基于此,对车钩安装座下盖板和复轨架车座结构进行优化,并采用有限元方法进行仿真验证,结果表明优化后的结构能满足该方案下的复轨架车需求。

关键词：地铁列车车体架车方案

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盐酸利多卡因缓释膜的体外释放度测定

广东药学院学报 2015年第6期31卷 701-704页

作者：崔曰新张蜀邓红池絮影朱秀城胡雪艳宁晓辉广东药学院药物研究所/广东省药物新剂型重点实验室广东广州510006

目的测定盐酸利多卡因缓释膜的质量分数及体外释放度。方法采用超高效液相色谱法（UPLC）对膜剂中的盐酸利多卡因进行快速测定;参照2010年版《中国药典》附录ⅩD第三法,采用改良的桨碟法进行释放度试验。结果 UPLC法对盐酸利多卡因的测... 详细信息

目的测定盐酸利多卡因缓释膜的质量分数及体外释放度。方法采用超高效液相色谱法（UPLC）对膜剂中的盐酸利多卡因进行快速测定;参照2010年版《中国药典》附录ⅩD第三法,采用改良的桨碟法进行释放度试验。结果 UPLC法对盐酸利多卡因的测定准确度和精密度良好,辅料不干扰药物的测定,平均回收率为99.55%,RSD为0.40%;盐酸利多卡因在20.15~503.8μg/m L范围内线性关系良好;3批自制盐酸利多卡因缓释膜24 h的累积释放率接近100%,符合一级释药模型。结论所建立的释放度测定方法准确可行,可用于该制剂的质量控制。

关键词：盐酸利多卡因膜剂超高效液相色谱法体外释放度

Kinship analysis reveals reproductive success skewed toward overwintered Brandt’s voles in semi-natural enclosures

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Integrative Zoology 2019年第5期14卷 435-445页

作者： Yan CHEN Dawei WANG ning LI Xiangfa HU Fei REN Weili HAO Ying SONG xiaohui LIU State Key Laboratory for Biology of Plant Disease and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina College of Life Sciences Sichuan UniversityChengduChina

Age structure and seasonality influence the population fluctuations of small *** determines body weight and social experience,while seasonality regulates the duration of the breeding season and onset of sexual maturity in newborn ***,reproductive success and skew usually occur in different age ***’s vole(Lasiopodomys brandtii)is a social,short-lived and seasonal breeding small rodent with a dramatic seasonal population fluctuation,but reproductive skew is not fully understood in this *** the present study,we determined kinship in semi-natural enclosure populations using microsatellite markers based on genotyping,analyzed the reproductive skew between sexes and between overwintered and newborn voles,and monitored variation in male reproductive activity by testing fecal testosterone levels throughout the *** voles had the most reproductive success along with a striking increase in the population size in the enclosures,with all biological fathers and 77.8%of biological mothers,which had 100%and 87%of the total offspring,*** to overwintered voles,reproductive skews were significantly higher in potential overwintered and newborn parents,implying the possible reproductive suppression of newborn voles by dominant overwintered ***,both heavier body weight and higher testosterone levels in overwintered males supported their potential social status in the *** study provided new evidence for reproductive skew and differentiation of postnatal gonadal development patterns of different age groups in Brandt’s vole.

关键词： Brandt’s vole microsatellite marker reproductive skew social dominance testosterone

Pitx2 suppression at meiotic stages associates with seasonal inhibition of testis development in Rattus norvegicus caraco

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Integrative Zoology 2023年第3期18卷 543-551页

作者： Lin TIAN Xixuan LI Yaqi YING Lewen WANG Yanting QIAO Dawei WANG Ying SONG ning LI xiaohui LIU State Key Laboratory for Biology of Plant Diseases and Insect Pests Key Laboratory of Weed and Rodent Biology and ManagementInstitute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina

The bicoid-related transcription factor 2(Pitx2)plays a crucial role in the development of many organs and tissues by affecting the mitotic cell *** testis development is related to mitosis and meiosis in mul-tiple cell types,but the role of Pitx2 gene in seasonal inhibition of testicular development remains unknown in *** analyzed PITX2 protein and Pitx2 mRNA expression features using both laboratory and wild male Rattus norvegicus *** postnatal testicle of laboratory colony,we found that PITX2 was expressed in Leydig cells,pachytene spermatocytes,round spermatids,and elongating spermatids rather than spermatogonia and lep-totene/zygotene ***2b expression signiﬁcantly increased along with the occurrence of pachytene spermatocytes and round spermatids,while decreased along with the processes of elongated *** wild male rats with similar testes weight,a signiﬁcantly suppressed Pitx2b expression occurred with an active meiotic stage in the inhibited testes in autumn and winter,compared with the normally developing testes in spring and *** results indicate that Pitx2b expression suppression plays a crucial role in the seasonal inhibition of testis development.

关键词： Pitx2 postnatal testis development Rattus norvegicus seasonal inhibition

Experimental Investigation into the Effect of Roll Amplitude on Roll Damping

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Journal of Shanghai Jiaotong university(Science) 2019年第6期24卷 732-738页

作者： HANG xiaohui GU Xiechong MA ning WANG Yifan WU Zeren State Key Laboratory of Ocean Engineering Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration School of Naval Architecture Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

An in-house large eddy simulation(LES)code has been developed in the previous *** order to validate the code for simulation of roll motion,effect of roll amplitude on forced roll damping is experimentally investigated in a circulating water channel at Shanghai Jiao Tong University(SJTU).KRISO very large crude carrier 2(KVLCC2)is taken as a target ship,and a model with a scale of 1:128.77 is *** are carried out for the ship model at shallow draft with frequencies around its natural roll frequency,where natural roll frequency is attained via free roll *** forced roll tests with roll amplitudes ranging from 1?to 4?are performed experimentally,and three forced roll motions are simulated with the in-house LES code for middle section of the ship *** between the computed roll damping coefficients and the ones from forced roll tests are quite *** means of particle image velocimetry(PIV),velocity fields in the vicinity of the ship model,and generation and evolution of vortices near the ship bilge are measured in *** is shown that roll amplitude has a significant effect on the vortex behavior,and therefore on the magnitude of roll damping *** experimental and numerical investigation into roll motions with large amplitudes is planned.

关键词： roll damping forced rolling ship model test particle image velocimetry(PIV) velocity field