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Paleoenvironment of marine-continental transitional shales in the lower Permian Shanxi formation,southeastern Ordos Basin,China

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Energy Geoscience 2024年第3期5卷 221-233页

作者： Jia Tan Yuqiang Jiang Xingtao Li chunhai Ji Yifan Gu Zhanlei Wang School of Geoscience and Technology Southwest Petroleum UniversityChengdu610500China The Unconventional Reservoir Evaluation Department PetroChina Key Laboratory of Unconventional Oil and Gas ResourcesChengdu610500China Project Department of Tight Oil and Gas Exploration and Development PetroChina Southwest Oil&Gas Field CompanyChengdu610056China PetroChina Coalbed Methane Company Beijing100028China Shale Gas Research Institute PetroChina Southwest Oil&Gasfield CompanyChengdu610051China

The paleoenvironment of shales can be reconstructed to some extent using the combinations or concentrations of elements that correlate strongly with environmental *** this study,we analyzed rare earth elements(REEs),major elements,and trace elements in the marine-continental transitional shales(transitional shales for short)of the Shan 2^(3)submember of the Shanxi Formation in the southeastern Ordos *** purpose is to deduce the paleoenvironmental conditions of the shales,encompassing paleoredox,paleoclimate,paleoproductivity,and *** Shan 2^(3)submember comprises four sections,namely Shan 2^(3)-1,Shan 2^(3)-2,Shan 2^(3)-3,and Shan 2^(3)-*** Ba/Al,P/Al,and Cu/Al ratios,along with biogenic barium(Babio),indicate that the paleoproductivity of the submember peaked during the Shan 2^(3)-1 deposition and exhibited a downtrend upward in other *** in the Uau and the Ni/Co,V/Cr,U/Th,and V/Sc ratios suggest that suboxic conditions prevailed during the Shan 2^(3)-1 deposition,with the oxidation level gradually increasing from Shan 2^(3)-1 to Shan 2^(3)-4.C-value and the Sr/Cu ***/Rb cross-plot indicate a warm and arid paleoclimate during the Shan 2^(3)-1 deposition,which transitioned to cooler,drier conditions during the deposition of other *** sensitive to paleoclimate,such as the K/Rb and Th/U ratios,along with the ICV,PIA,and Chemical Index of Alteration(CIA),highlight elevated weathering from Shan 2^(3)-2 to Shan 2^(3)-4.with Shan 2^(3)-1 exhibiting the weakest weathering during its *** suggested by the REE data,the Zr/Sc ***/Sr cross-plot,provenance discriminant functions,and the cross-plots of Hf ***/Th,Th ***-Co,and∑REE ***/Yb,the sedimentary provenance for the transitional shales of the Shan 2^(3)submember is of multiple origins,with significant contributions from the Upper Continental Crust(UCC).Discriminant diagrams,including those of Th-Co-Zr/10,Th-Sc-Zr/10,La-Th-Sc,and K_(2)O/Na_(2)O

关键词： Transitional shale Paleoenvironment Elemental geochemistry Upper Permian Shan 2^(3)submember Ordos basin

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高炉喷吹煤粉颗粒与热风间动量能量交换的数值仿真

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材料与冶金学报 2024年第4期23卷 329-335页

作者：柯春海陈和平张浩信阳师范大学数学与统计学院河南信阳464000 东北大学冶金学院沈阳110819

为了揭示高炉风口回旋区周边颗粒对煤粉颗粒受力和传热特性的影响机理,建立了基于CPU-GPU异构并行模式的三维浸没边界-格子Boltzmann法(IB-LBM)模型,针对串列三颗粒在流场中的曳力和传热特征开展数值模拟研究,详细讨论了雷诺数(10≤Re≤... 详细信息

为了揭示高炉风口回旋区周边颗粒对煤粉颗粒受力和传热特性的影响机理,建立了基于CPU-GPU异构并行模式的三维浸没边界-格子Boltzmann法(IB-LBM)模型,针对串列三颗粒在流场中的曳力和传热特征开展数值模拟研究,详细讨论了雷诺数(10≤Re≤100)和颗粒间距(s=2D,4.)对曳力系数Cd和平均努塞尔数Nu的影响.结果表明:第2个和第3个颗粒置入后,随着Re的增大,3个颗粒的Cd均减小(Cd_(1)>Cd_(2)>Cd_(3)),而3个颗粒的Nu均增大(Nu1>Nu2>Nu3);根据数值模拟结果,分别构建了串列三颗粒的Cd与Nu的新关联式,新关联式得出的Cd和Nu预测值与数值模拟结果相比,最大误差分别为2.54.9%和0.4.80%,这表明该关联式适用于高炉喷吹煤粉颗粒在热风中受力和传热机制的数值仿真过程.

关键词：格子Boltzmann法串列三颗粒曳力系数平均努塞尔数

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抗病籼型水稻光温敏核不育系华1228S的选育及应用

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杂交水稻 2024年第1期39卷 68-73页

作者：米甲明李春海熊立仲牟同敏华中农业大学作物遗传改良全国重点实验室湖北武汉430070

华1228S是以广占63-4.为受体亲本,以携带Xa7基因的抗白叶枯病株系材料YR7029-39和携带Pi2基因的抗稻瘟病株系材料VE6219作供体亲本,通过杂交、回交、复交和分子标记辅助选择进行基因聚合选育而成的抗稻瘟病、抗白叶枯病籼型水稻光温敏... 详细信息

华1228S是以广占63-4.为受体亲本,以携带Xa7基因的抗白叶枯病株系材料YR7029-39和携带Pi2基因的抗稻瘟病株系材料VE6219作供体亲本,通过杂交、回交、复交和分子标记辅助选择进行基因聚合选育而成的抗稻瘟病、抗白叶枯病籼型水稻光温敏核不育系。以华1228S为母本已经配组了10个杂交稻组合通过审定,其中2个通过国审、8个通过湖北省审定。

关键词：杂交水稻光温敏核不育系华1228S 抗病稻瘟病白叶枯病分子标记辅助选择

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A high-resolution late Pleistocene record of pollen vegetation and climate change from Jingning, NW China

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Science China Earth Sciences 2006年第2期49卷 154-162页

作者： LI chunhai12, TANG Lingyu1, FENG Zhaodong3,4. ZHANG Hucai2, WANG Weiguo3 & AN Chenbang3 1. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China 2. Nanjng Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China 3. Environment and Resources College, Lanzhou University, Lanzhou 730000, China 4. Beijing Normal University, Beijing 100875, China 1. Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China 2. Nanjng Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China 3. Environment and Resources College Lanzhou University Lanzhou 730000 China 4. Beijing Normal University Beijing 100875 China

With the support of 18 AMS-14. data, a high-resolution pollen record from the Suancigou section at Jingning, Gansu Province was established. Our results showed that the vegetation ex-perienced a series of changes characterized by the alternative growth and decline of forest and steppe components during the period from 4..2 to 11 ka B.P. in the Jingning area. Over the period of 4.―29 ka B.P. (MIS3), coniferous forests were flourishing, indicating a humid climate with the tem-perature being lower than that of the present. Since 23 ka B.P., the vegetation was dominated by steppe-desert steppe under a cold and dry condition, and entered the Last Glacial Maximum domi-nated by desert steppe. Several periods of the marked decrease in the arborous pollen content in Suancigou well corresponded to the North Atlantic Heinrich events, especially to Heinrich event 3, further supporting that the Heinrich events were well reflected by the pollen record in the Loess Pla-teau as well.

关键词： Western Loess Plateau, pollen record, climatic change, late Pleistocene.

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Understanding the Initial Decomposition Pathways of the n-Alkane/Nitroalkane Binary Mixture

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Chinese Journal of Chemistry 2013年第8期31卷 1087-1094页

作者： Yulei Guan Ying Zhang chunhai Yi Bolun Yang Department of Chemical Engineering State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an Shannxi 710049 China

Addition of nitroalkanes into n-alkanes can lower the activation barriers of free-radical production and acceler- ate the decomposition of n-alkanes at relatively low temperatures. Four initial decomposition mechanisms of the n-butane/nitroethane binary mixture were proposed for the promoting effect and considered theoretically at the B3LYP, BB1K, BMK, MPW1K, and M06-2X levels with MG3S basis set. Energetics above was compared to high-level CBS-QB3 and G4.calculations. Calculated results confirm the feasibility of the four initial decomposition pathways：（I） the C--NO2 bond rupture of nitroethane to produce ethyl and .NO2, （II） HONO elimination from nitroethane followed by decomposition to .OH and .NO, （1II） rearrangement of nitroethane to ethyl nitrite which further dissociates into CH3CH20. and .NO, and （IV） direct hydrogen-abstraction ofnitroethane with n-butane.

关键词： free radical initial decomposition mechanism computational chemistry hydrogen-abstraction bimol-ecular

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现行黄河口分汊河道的分流特征及其影响机制

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海洋地质与第四纪地质 2024年第2期44卷 131-145页

作者：葛春海范勇勇巴旗孙超吴振吴晓王厚杰毕乃双中国海洋大学海洋地球科学学院青岛266100 黄河河口海岸科学研究所东营257091 山东省第四地质矿产勘查院潍坊261021 中国海洋大学海底科学与探测技术教育部重点实验室青岛266100

自2013年黄河尾闾河道出汊形成双槽入海的河口汊道,控制了河口流量的分配,但其分流特征及其影响机制尚不清楚。本文基于Delft3D构建了黄河口汊道的水动力三维数值模型,模拟了不同工况下河口汊道的分流特征,揭示了其影响机制。结果表明:... 详细信息

自2013年黄河尾闾河道出汊形成双槽入海的河口汊道,控制了河口流量的分配,但其分流特征及其影响机制尚不清楚。本文基于Delft3D构建了黄河口汊道的水动力三维数值模型,模拟了不同工况下河口汊道的分流特征,揭示了其影响机制。结果表明:河口汊道的分流不对称性随流量的增加而减小,流量增加加大了东汊与北汊河道的水位梯度差,使得从东汊河道的流量增量较北汊河道大,河流流量的分配更加均匀。潮汐作用增强了河口汊道的流量不对称性,而随着径流量的增加,潮汐的增强作用逐渐减弱。这主要由于在半日潮的作用下,东汊和北汊河道水位梯度的差异,形成河口潮汐的“东阻北促”效应,增强了河口汊道的分流不对称性。

关键词：分汊河道分流不对称性潮汐径流量黄河口

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Photocatalytic Activities of TiO_2 Coated on Different Semiconductive SiC Foam Supports

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Journal of Materials Science & Technology 2013年第11期29卷 1074-1078页

作者： Dong Hao Zhenming Yang chunhai Jiang Jinsong Zhang Institute of Metal Research Chinese Academy of Sciences University of Chinese Academy of Sciences

Different semiconductive SiC foam supports were prepared by varying the sintering temperature and atmosphere, and with or without alkaline solution treatment and high temperature oxidation following a macromolecule pyrogenation combined with reaction bonding method. Nano-TiO2 particles were immobilized onto these SiC foam supports by a composite sol-gel method. The phase, surface morphology, the type of conduction and the photocatalytic activity of the TiO2-SiC composite photocatalysts were studied. The TiO2 coated on p-type Si-free SiC support showed the highest photocatalytic efficiency in degradation of 4. aminobenzenesulfonic acid （4.ABS） in aqueous solution as compared to that coated on n-type SiC support and p-type SiC supports with residual Si or Si02 on the surface. The result showed that the TiO2 coatings immobilized on p-type semiconductive SiC foam supports exhibited obviously higher photocatalytic activity in comparison to that coated on n-type SiC foam support. The p-n heterojunctions formed between the p-type SiC supports and n-type TiO2 coatings might be able to account for the better charge separation and transfer as well as the photocatalytic activity of the TiO2-SiC composite photocatalyst.

关键词： SiC foam ceramics TiO2 coating Composite Sol-Gel Photocatalytic activity

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纳米CuBi_(2)O_(4./G复合增强AP/nAl复合物燃烧和释压研究

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滁州学院学报 2024年第2期26卷 6-11,28页

作者：丁恒谯志强刘春海成都理工大学材料与化学化工学院成都610000 中国工程物理研究院化工材料研究所四川绵阳621000

为了显著提高AP/nano-Al(nAl)复合物的压力释放效率,降低燃烧时间,提出了一种制备AP/nAl/G/CuBi_(2)O_(4.(CBO)复合物的策略。密闭爆发测试结果表明,复合物的压力释放率和压力达到峰值时间都得到了显著改善;当添加石墨烯(G)(2 wt%)/CBO(... 详细信息

为了显著提高AP/nano-Al(nAl)复合物的压力释放效率,降低燃烧时间,提出了一种制备AP/nAl/G/CuBi_(2)O_(4.(CBO)复合物的策略。密闭爆发测试结果表明,复合物的压力释放率和压力达到峰值时间都得到了显著改善;当添加石墨烯(G)(2 wt%)/CBO(5 wt%)时压力增加13.5%,增压速率增加51.1%。此外,利用激光点火装置和高速摄像系统对制备复合物的点火和燃烧性能进行了评估,结果表明G和CBO的引入成功降低了点火延迟并缩短了20 ms燃烧时间。综上所述,添加CBO和G能显著改善AP/nAl燃烧放热、峰值压力与最大增压速率。

关键词： CuBi_(2)O_(4. 石墨烯激光点火密闭爆发燃烧

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同位靶磁控溅射法制备Al掺杂CdSe薄膜

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热加工工艺 2024年第16期53卷 159-162页

作者：何惠江宣乐毛高翔刘辉王春海陕西华秦科技实业股份有限公司陕西西安710048 西北工业大学陕西西安710072

为增加掺杂薄膜的元素均匀性,基于磁控溅射技术,设计了靶材同位共溅射制备掺杂薄膜的方法,并用于制备Al掺杂CdSe薄膜,获得了Al均匀掺杂的CdSe薄膜。结果表明:制备的薄膜为富Se状态,呈现明显的(111)择优取向。Al掺杂后的CdSe薄膜方块电阻... 详细信息

为增加掺杂薄膜的元素均匀性,基于磁控溅射技术,设计了靶材同位共溅射制备掺杂薄膜的方法,并用于制备Al掺杂CdSe薄膜,获得了Al均匀掺杂的CdSe薄膜。结果表明:制备的薄膜为富Se状态,呈现明显的(111)择优取向。Al掺杂后的CdSe薄膜方块电阻由5.2 kΩ/□升高至54..5 kΩ/□。随着Al掺杂量的增加,薄膜的方块电阻下降。当共溅射Al片为6片时,薄膜方块电阻为7.7 kΩ/□,薄膜半导体类型由p型转变为n型。掺杂薄膜体电导率分别为192.4.未掺杂)、2.01×10^(4.(Al片数1)、506.9(Al片数2)、384.8(Al片数4.、284.9 mΩ·cm(Al片数6)。掺杂薄膜样品的禁带宽度Eg分别为1.82(未掺杂)、1.97(Al片数1)、1.75(Al片数2)、1.78(Al片数4.、1.82 eV(Al片数6)。

关键词：同位靶磁控溅射 Al掺杂CdSe薄膜电学行为

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Copolymerization-Assisted Preparation of Porous LiMn_2O_4.Hollow Microspheres as High Power Cathode of Lithium-ion Batteries

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Journal of Materials Science & Technology 2017年第8期33卷 781-787页

作者： Zhimin Zou Zhaojin Li Hui Zhang Xiaohui Wang chunhai Jiang Fujian Provincial Key Laboratory of Functional Materials and Applications Institute of Advanced Energy Materials School of Materials Science and Engineering Xiamen University of Technology Institute of Metal Research Chinese Academy of Sciences

Porous LiMn2O4.hollow microspheres were facilely prepared by incorporation of Li and Mn elements into a spherical polymeric precursor through copolymerization of lithium and manganese acetates with resorcinol and hexamethylenetetramine and then burning off the organic matrix at appropriate temperatures in air. The LiMn2O4.inherited the spherical morphology of the polymeric precursor but showed hollow porous structure assembled by nanocrystals of about 50–100 nm in size. When tested as cathode of Li-ion batteries, the LiMn2O4.hollow spheres exhibited excellent rate capability and cycle stability.A discharge capacity of above 90 mAh g-1was maintained at 10 C（1C = 120 mAg-1）, and the cells can still deliver a discharge capacity over 100 mAhg-1after another 115 cycles at 0.5 C. With such excellent electrochemical properties, the prepared LiMn2O4.hollow microspheres could be promising cathode of Li-ion batteries for long term and high power applications.

关键词： Li-ion batteries Cathode LiMn2O4 Hollow spheres Rate capability

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