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Lithofacies Characters and Significance of the Submarine Fan of the Liufengguan Group in Qinling

Acta Geologica Sinica(English Edition) 2012年第1期86卷 174-188页

作者： ZHENG Ning LI Tingdong YOU guoqing zhang Shuanhou CUI Jiantang CHENG Muwei institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Shaanxi institute of Geological Survey Xi'an 710065ShaanxiChina Research institute of Petroleum Exploration and Development Beijing 100083China

Field investigation and laboratory research on flysch of the Liufengguan Group in Qinling indicate the following：（1） Sandstone of the Liufengguan Group is categorized as feldspathic lithic graywacke with a minor amount of lithic graywacke in the QFR triangular diagram. Grain size〈0.3 mm. Bedding plane structures such as groove casts and suspected flute casts can be found at the bottom of the sandstone. It is inferred that currents may have come from the southeast during deposition. Bedding structures such as ripple marks, graded bedding, parallel bedding, small-scale cross bedding, climbing bedding, suspected convolute bedding, microlamination and sliding structures have also been observed, which are of indicative significance. It is thought that the Liufengguan Group has the sedimentary characteristics of bedding, bedding plane structures and lithologicai assemblages of deep-sea low-density turbidity current deposits. The vertical succession of the Bouma sequence in the inner fan subfacies zone is generally incomplete： the assemblage of Ta and Tabc is commonly seen; the succession of the middle fan subfacies zone is relatively complete; and divisions Te and Tb are common in the outer fan subfacies zone. （2） The flysh of the Liufengguan Group is a sequence of deep-sea argillaceous-arenaceous submarine fan deposits, in which the authors recognize the inner, middle and outer fan subfacies and also nine types of lithofacies： normal graded sandstone （A1）, medium- to thick-bedded, fine-grained sandstone （A2）, medium- to thick-bedded and massive siltstone （A3）, thin-bedded, fine-grained sandstone and mudstone （B1）, irregular interbeds of thinbedded, fine-grained sandstone and siltstone （B2）, thin-bedded, fine-grained sandstone （C1）, very thin-bedded, fine-grained sandstone （D1）, olistostromes （El） anddeep-sea mudstone （F）. The inner fan consists of four microfacies： natural levee （A1）, water channel （A2, A3） and olistostrome （El）; in the middle fan there also occur four

关键词： Liufengguan Group flysh lithofacies low-density turbidity current submarine fan

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GSK3 regulates VRN1 to control flowering time in wheat

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Journal of Integrative Plant Biology 2023年第7期65卷 1605-1608页

作者： guoqing Cui Danping Li Lichao zhang Chuan Xia Xiuying Kong Xu Liu State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

The precise control of flowering time is important for the regional adaptability and productivity of many *** categories of genes related to flowering have been isolated and characterized functionally in wheat(Triticum aestivum) in response to vernalization to adjust flowering initiation. Before vernalization, the inhibitory histone modification H3K27me3 is enriched in the promoter and the first intron of the vernalization gene VRN1.

关键词： aestivum precise flowering

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用lageos1和lageos2激光测距资料联合解地球定向参数

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天文学报 2003年第2期44卷 189-196页

作者：冯初刚朱元兰张飞鹏中国科学院上海天文台上海200030 中国科学院国家天文台北京100012 中国科学院天文地球动力学研究中心

为了响应国际地球自转服务中心(IERS)和国际激光测距服务中心(ILRS)的呼吁,上海天文台天文地球动力学研究中心参加了对激光测距卫星lageos1、lageos2的资料的分析、计算,提交了关于地球定向参数(EOP)(1998-2001)的联合(lageos1、lageos2... 详细信息

为了响应国际地球自转服务中心(IERS)和国际激光测距服务中心(ILRS)的呼吁,上海天文台天文地球动力学研究中心参加了对激光测距卫星lageos1、lageos2的资料的分析、计算,提交了关于地球定向参数(EOP)(1998-2001)的联合(lageos1、lageos2)解算结果报告:(SHAO)2002 L 01 利用更精细化的和改正了的计算EOP的模型,获得了EOP(SHAO)2002 L 01系列。该系列与同时期的IERS的EOP(IERS)C04相比,符合程度:极移X_p、Y_p好于0.35mas,日长变化D_u好于0.030ms。

关键词：激光测距地球定向参数卫星动力学地球自转

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The FAST all sky HI survey(FASHI):The first release of catalog

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Science china(Physics,Mechanics & Astronomy) 2024年第1期67卷 112-133页

作者： Chuan-Peng zhang Ming Zhu Peng Jiang Cheng Cheng Jing Wang Jie Wang Jin-Long Xu Xiao-Lan Liu Nai-Ping Yu Lei Qian Haiyang Yu Mei Ai Yingjie Jing Chen Xu Ziming Liu Xin Guan Chun Sun Qingliang Yang Menglin Huang Qiaoli Hao FAST Collaboration Guizhou Radio Astronomical Observatory Guizhou UniversityGuiyang 550000China National Astronomical Observatories Chinese Academy of Sciences(CAS)Beijing 100101China chinese academy of sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China Kavli institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China

The FAST All Sky HI survey(FASHI)was designed to cover the entire sky observable by the Five-hundred-meter Aperture Spherical radio Telescope(FAST),spanning approximately 22000 square degrees of declination between-14°and+66°,and in the frequency range of 1050-1450 MHz,with the expectation of eventually detecting more than 100000 HI *** August 2020 and June 2023,FASHI had covered more than 7600 square degrees,which is approximately 35%of the total sky observable by *** has a median detection sensitivity of around 0.76 m Jy beam-1and a spectral line velocity resolution of~6.4 km s-1at a frequency of~1.4 *** of now,a total of 41741 extragalactic HI sources have been detected in the frequency range 1305.5-1419.5 MHz,corresponding to a redshift limit of z■*** cross-matching FASHI sources with the Siena Galaxy Atlas(SGA)and the Sloan Digital Sky Survey(SDSS)catalogs,we found that 16972(40.7%)sources have spectroscopic redshifts and 10975(26.3%)sources have only photometric *** of the remaining 13794(33.0%)HI sources are located in the direction of the Galactic plane,making their optical counterparts difficult to identify due to high extinction or high contamination of Galactic stellar *** on current survey results,the FASHI survey is an unprecedented blind extragalactic H I *** has higher spectral and spatial resolution and broader coverage than the Arecibo Legacy Fast ALFA Survey(ALFALFA).When completed,FASHI will provide the largest extragalactic HI catalog and an objective view of HI content and large-scale structure in the local universe.

关键词： surveys redshifts galaxies telescope radio lines HI line

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Determination of optimal dietary selenium levels by full expression of selenoproteins in various tissues of broilers from 1 to 21 d of age

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Animal Nutrition 2021年第4期7卷 1133-1144页

作者： Xiudong Liao guoqing Liu Guangming Sun Xiaoming Sun Tao Liu Lin Lu Liyang zhang Minhong zhang Yanli Guo Xugang Luo Mineral Nutrition Research Division State Key Laboratory of Animal NutritionInstitute of Animal ScienceChinese Academy of Agricultural SciencesBeijingChina Poultry Mineral Nutrition Laboratory College of Animal Science and TechnologyYangzhou UniversityYangzhouChina College of Animal Science and technology Gansu Agricultural UniversityLanzhouChina Biochemistry Department Case Western Reserve UniversityClevelandUSA State Key Laboratory of Hulless Barley and Yak Germplasm Resources and Genetic Improvement LhasaChina institute of Animal Science and Veterinary Tibet Academy of Agricultural and Animal Husbandry SciencesLhasaChina

The current NRC dietary selenium(Se)requirement(0.15 mg/kg)of broilers is primarily based on growth performance data reported in *** study aimed to determine optimal dietary Se levels of broilers fed a practical corn-soybean meal diet for the full expression of selenoproteins in various tissues.A total of 384 one-d-old male broilers(n=8 replicates/diet)were fed a basal corn-soybean meal diet or the basal diet supplemented with 0.1,0.2,0.3,0.4 or 0.5 mg Se/kg in the form of Na_(2)SeO_(3) for 21 *** analysis was conducted to evaluate the optimal dietary Se levels using broken-line,quadratic or asymptotic *** activity of glutathione peroxidase(GPX)in the plasma,liver,kidney and pancreas,iodothyronine deiodinase(DIO)in the plasma,liver and pancreas,and thioredoxin reductase(Txnrd)in the liver and pancreas,the mRNA levels of Gpx1,Gpx4,Dio1,selenoprotein(Seleno)h,Selenop and Selenou in the liver,Gpx4,Dio1,Txnrd1,Txnrd2,Selenoh,Selenop and Selenou in the kidney,and Gpx1,Gpx4,Selenoh and Selenou in the pancreas,and the protein levels of GPX4 in the liver and kidney of broilers were influenced(P36 mg/kg based on the fitted broken-line,quadratic or asymptotic models(P1)of the aforementioned selenoprotein expression in the plasma,liver and kidney,and 0.09 to 0.46 mg/kg based on the fitted broken-line models(P1)of the aforementioned selenoprotein expression in the *** results indicate that the optimal dietary Se levels would be 0.36 mg/kg to support the full expression of selenoproteins in the plasma,liver and kidney,and 0.46 mg/kg to support the full expression of selenoproteins in the pancreas of broilers fed a practical corn-soybean meal diet from 1 to 21 d of age.

关键词： Selenium Selenoprotein Gene expression Requirement Broiler

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孔隙介质方腔内自然对流的动力学演化

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中国科学院大学学报（中英文） 2024年第5期41卷 589-603页

作者：张连平王世民中国科学院大学地球与行星科学学院中国科学院计算地球动力学重点实验室北京100049

流体饱和孔隙介质腔体内的自然对流是非线性流体动力学研究的经典问题。受早期计算条件限制,前人研究主要侧重于中心对称对流模态的时空演化动力学机制,不能完整刻画实际孔隙自然对流系统中包含全部对流模态的动力学行为,因而无法直接... 详细信息

流体饱和孔隙介质腔体内的自然对流是非线性流体动力学研究的经典问题。受早期计算条件限制,前人研究主要侧重于中心对称对流模态的时空演化动力学机制,不能完整刻画实际孔隙自然对流系统中包含全部对流模态的动力学行为,因而无法直接应用于实际工程。基于伽辽金法和配点伪谱法数值模拟底部加热的孔隙介质方腔内模态完备的二维自然对流,首次得到自然对流从发生到走向混沌的完整动力学演化路径。模拟结果揭示,随着Ra从4π~2单调增加到1 200,自然对流演化历经21个不同阶段(包括1个稳态对流阶段、6个单频振荡阶段、9个准周期振荡阶段、2个锁频共振阶段和3个非周期混沌振荡阶段)。对流模态的空间变化与时间振荡是对流形态反复发生交替的根本原因。采用时间序列、功率谱、相图和洛伦兹映射4种作图方法,系统对比Nu表征的计算热流作单频、准周期、锁频和混沌振荡的不同特征。计算平均热流和振荡主频随Ra的变化可由简单的解析公式拟合(在很宽的Ra区间内近似服从经典边界层标度律),为相应条件下实际工程设计和应用提供了便捷的计算工具。

关键词：自然对流动力学演化孔隙介质对流模态数值模拟

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Fuzzy Chance Constrained Support Vector Machine

Fuzzy Chance Constrained Support Vector Machine

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2010 International Conference on Life System Modeling and Simulation & 2010 International Conference on Intelligent computing for Sustainable Energy and Environment

作者： Hao zhang1 , Kang Li2, Cheng Wu1 1 Department of Automation, Tsinghua University, beijing 100084, china 2Queen’s University Belfast, UK

This paper aims to improve the performance of the widely used fuzzy support vector machine (FSVM) model. By introducing a fuzzy possibility measure, we first modify the original inequality constraints of FSVM optimization model as chance constraints. We fuzzify the distance between training data and the separating hyperplane, and use a possibility measure to compare two fuzzy numbers in forming the constraints for the FSVM model. By maximizing the confidence level we ensure that the number of misclassifications is minimized and the separation margin is maximized to guarantee the generalization. Then, the fuzzy simulation based genetic algorithm is used to solve the new optimization model. The effectiveness of the proposed model and algorithm is validated on an application to the classification of uncertainty in the hydrothermal sulfide data in the TAG region of ocean survey. The experimental results show that the new fuzzy chance constrained SVM model outperforms the original SVM model.

关键词： Fuzzy SVM, Possibility measure, Chance constrained programming, Fuzzy simulation, Genetic algorithm

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客运中转径路的换乘模型及算法

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铁道学报 1999年第5期21卷 1-4页

作者：史峰马钧培向联慧张彦长沙铁道学院管理科学与工程研究所湖南长沙410075 铁道部科学研究院电子计算技术研究所北京100081 铁道部科学研究院运输及经济研究所北京100081

铁路客运中转径路是铁路客运通票的重要组成部分，标识了通票的途经径路。计算机发售通票业务过程中需要一些中转径路备选使用，这些备选中转径路是在一定合理性上计算出来的。本文结合中转旅客的必要需求，在“路网模型”和“变线模型... 详细信息

铁路客运中转径路是铁路客运通票的重要组成部分，标识了通票的途经径路。计算机发售通票业务过程中需要一些中转径路备选使用，这些备选中转径路是在一定合理性上计算出来的。本文结合中转旅客的必要需求，在“路网模型”和“变线模型”的基础上，综合考虑了中转里程短和换乘次数少这两方面因素，建立了优化计算中转径路更为完善的“换乘模型”，并提出了有效的求解算法。

关键词：中转径路最优化铁路运输旅客运输换乘模型

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非掺杂型Si/SiGe异质结外延与表征

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物理学报 2024年第11期73卷 297-304页

作者：耿鑫张结印卢文龙明铭刘方泽符彬啸褚逸昕颜谋回王保传张新定郭国平张建军华南师范大学物理学院广州510631 松山湖材料实验室半导体异质材料与器件中心东莞523830 中国科学技术大学中国科学院量子信息重点实验室合肥230026 中国科学院物理研究所纳米物理与器件重点实验室北京100190 上海大学理学院上海200444

以自旋为编码单元的硅基半导体量子计算与传统微电子工艺兼容,易拓展且可以同位素纯化提高退相干时间,因而备受关注.本研究工作通过分子束外延生长了高质量非掺杂型Si/SiGe异质结并测试了二维电子气迁移率.球差电镜观察到原子级尖锐界面... 详细信息

以自旋为编码单元的硅基半导体量子计算与传统微电子工艺兼容,易拓展且可以同位素纯化提高退相干时间,因而备受关注.本研究工作通过分子束外延生长了高质量非掺杂型Si/SiGe异质结并测试了二维电子气迁移率.球差电镜观察到原子级尖锐界面,原子力显微镜表征显示其表面均方根粗糙度仅为0.44 nm,低温下迁移率达到20.21×10^(4)cm^(2)·V^(–1)·s^(–1).不同栅压下载流子浓度和迁移率的幂指数为1.026,材料丁格比值在7—12之间,表明载流子主要受到背景杂质散射和半导体/氧化物的界面散射.

关键词： Si/SiGe异质结二维电子气霍尔迁移率硅基量子计算

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Exploring Sulfur Chemistry in TMC-1 with NSRT

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chinese Physics Letters 2024年第2期41卷 129-132页

作者： Wasim Iqbal Xiaohu Li Juan Tuo Ryszard Szczerba Yanan Feng Zhenzhen Miao Jiangchao Yang Jixing Ge Gleb Fedoseev Donghui Quan Qiang Chang Chuan-Lu Yang Tao Yang Gao-Lei Hou Yong zhang Xuan Fang Xia zhang Fangfang Li Rong Ma Xiaomin Song Zhiping Kou Yuxuan Sun Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China University of chinese academy of sciences Beijing 100049China Nicolaus Copernicus Astronomical Center Rabia´nska 887-100 Toru´nPoland Research Laboratory for Astrochemistry Ural Federal UniversityKuibysheva St.48620026 EkaterinburgRussia Astronomical computing Research Center Zhejiang LaboratoryHangzhou 311100China School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China School of Physics and Optoelectronic Engineering Ludong UniversityYantai 264025China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiaotong UniversityXi’an 710049China School of Physics and Astronomy Sun Yat-sen UniversityGuangzhou 510275China Laboratory for Space Research Faculty of ScienceThe University of Hong KongHong KongChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China

There have been several studies on sulfur depletion in dense cores like TMC-1(Taurus Molecular Cloud 1),employing updated reaction networks for sulfur species to explain the missing sulfur in the gas within dense *** of these studies used a C/O ratio of 0.7 or *** present NSRT(NanShan 26m Radio Telescope)observations of TMC-1 alongside results from time-dependent chemical simulations using an updated chemical *** findings highlight the impact of the C/O ratio on the gas-phase evolution of C2S and *** simulation results show that the C/O ratio is an important parameter,playing a fundamental role in determining the gas-phase abundances of sulfur species in dense cores.

关键词： sulfur Sulfur depletion

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