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Probing the Galactic Halo with RR Lyrae *** Radial Velocity Curve Templates of RRc Stars

Research in Astronomy and Astrophysics 2024年第7期24卷 118-134页

作者： Yue Huang Min Fang Gaochao Liu Xianzhong Zheng Sarah Ann Bird yang Huang Jianrong Shi Jiangtao Wang Huawei {2. Haijun Tian Haotong {2. College of Science China Three Gorges UniversityYichang 443002China Center for Astronomy and Space sciences China Three Gorges UniversityYichang 443002China Purple mountain Observatory Chinese Academy of SciencesNanjing 210023China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesBeijing 100101China Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China Kavli institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China School of sciences Hangzhou Dianzi UniversityHangzhou 310018China

We present radial velocity(RV)curve templates of RR Lyrae first-overtone(RRc)stars constructed with the Mg I b triplet and Hαlines using time-domain Medium-Resolution Survey spectra of seven RRc stars from Large Sky Area Multi-Object Fiber Spectroscopic Telescope(LAMOST)Data Release ***,we derive the relation between the stellar RV curve amplitudes and g-band light curve amplitudes from Zwicky Transient Facility(ZTF)public *** those RRc stars without ZTF g-band light curves,we provide the conversions from the light curve amplitudes in ZTF r-and i-bands,Gaia G-band,and V-band from the All-Sky Automated Survey for Supernovae to those in ZTF *** validate our RV curve templates using the RRc star SV Scl and find the uncertainties of systemic RV are less than 2.11 km s~(-1)and 6.08 km s~(-1)based on the Mg I b triplet and Hαlines,*** calculate the systemic RVs of 30 RRc stars using the RV curve templates constructed with the Mg I b triplet and Hαlines and find the systemic RVs are comparable with each *** RV curve template will be particularly useful for obtaining the systemic RV of RRc using the LAMOST spectroscopy.

关键词： stars variables RR Lyrae-Stars-techniques radial velocities

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Control Techniques of chinese Chestnut Yellow Crinkle

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Plant Diseases and Pests 2024年第3期15卷 12-13页

作者： Shuhang zhang Yongbin xiong Liying FAN Changli institute of Pomology Hebei Academy of Agriculture and Forestry SciencesChangli 066600China Hebei academy of Agriculture and Forestry sciences Shijiazhuang 050031China

This paper initially delineates the symptoms,characteristics,and hazards associated with chinese chestnut yellow crinkle,as well as the transmission and infection pathways of the ***,it proposes the prevention and control strategies of the disease,including rigorous investigation and monitoring of the disease,enhanced monitoring of seedlings and scions,and integrated disease management techniques to promote the tree s health and *** strategies serve to inform the prevention and control of chinese chestnut yellow crinkle in production.

关键词： Chestnut chinese chestnut yellow crinkle Symptom Prevention and control

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Study on the Dynamics Mechanism of Railway Flood in Xinjiang Line of New Eurasian Continental Bridge

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Wuhan University Journal of Natural sciences 2003年第S2期 1029-1033页

作者： yang Si-quan, Chen Ya-ning, Wang Ang-sheng, zhang Jian-guo, Li Wei-hong institute of Atmospheric Physics, chinese academy of sciences, Beijing 100029, china china National Center for Disaster Reduction, ministry of Civil Affairs, Beijing 100053, china Xinjiang institute of Ecology and Geography, chinese academy of sciences, Urumqi 830011, Xinjiang, china institute of mountain Hazards and environment, chinese academy of sciences, chengdu 61004., Sichuan, china

In this paper, taking railway flood in Xinjiang Line of New Eurasian Continental Bridge as an example, the dynamics mechanism of railway flood has been studied by using Chaotic Theory. During study, some nonlinear features of railway flood, such as correlation dimension D2.and Kolomogorov entropy K, are analyzed based on time-series of railway flood in Xinjiang Line of New Eurasian Continental Bridge. Results show: time-series distribution of railway flood has some characteristics of Chaos dynamic system, and the variation of railway flood frequency is a definite low-dimension Chaotic attractor. The average length of Tp(Tp = 15d) calculated in this paper, which shows the time of forecasting by this Chaotic dynamic system, is close to the reality.

关键词： dynamics mechanism railway flood chaotic theory

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川江流域防护林区土壤质量评价方法

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山地研究 1992年第2期10卷 109-115页

作者：张建辉中国科学院、水利部成都山地灾害与环境研究所

根据川江流域防护林区内森林地、宜林地并存,且宜林地占有相当比重的特点,将评价对象仅限定于土壤本身,并选取土壤质地等十项可实测土壤指标为评价因素。在此基础上,邀请众多专家进行土壤质量的指标强度分级和因素权重分配。最后采用模... 详细信息

根据川江流域防护林区内森林地、宜林地并存,且宜林地占有相当比重的特点,将评价对象仅限定于土壤本身,并选取土壤质地等十项可实测土壤指标为评价因素。在此基础上,邀请众多专家进行土壤质量的指标强度分级和因素权重分配。最后采用模糊数学的综合评判法对土壤质量作出评价。评价结果表明,此套方法对川江流域防护林区土壤质量评价是较为合理的,并较其他方法更具优越性。

关键词：川江流域土壤质量评价方法模糊数学

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宁南县城后山泥石流生物治理

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山地研究 1990年第4期8卷 266-273页

作者：张有富中国科学院、水利部成都山地灾害与环境研究所

后山属泥石流活跃区,需加以治理。治理区面积8.39平方公里,县城面积2.00平方公里。1985—1989年开展治理。后山泥石流生物治理总投资10.09万元。其完成的工程有:造林面积2.77亩,栽桑面积50亩,栽油桐面积450亩。生物治理后,创产值48.74... 详细信息

后山属泥石流活跃区,需加以治理。治理区面积8.39平方公里,县城面积2.00平方公里。1985—1989年开展治理。后山泥石流生物治理总投资10.09万元。其完成的工程有:造林面积2.77亩,栽桑面积50亩,栽油桐面积450亩。生物治理后,创产值48.74万元。因而投入与产出比1.0∶4.8。森林覆盖率从1985年的2..3％增加到1989年的43.8％。生物治理在后山泥石流综合治理中起着举足轻重的作用。

关键词：宁南县城后山泥石流生物治理

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The Analysis of CO2.Influence Factors in Tianquan Cave of Xingwen World Geopark

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四川地质学报 2009年第S1期 113-119页

作者： SHUI Wei 1 HU Yi 2.zhang Bing 3 SU Zheng-an 4 WANG Chen-yi 2.REN De-you 3 XU Xue-yi 1 CHENG Jin-ping 2.1.Department of Eco-agriculture and Rural Development,Sichuan Agricultural University,Ya'an 62.014,Sichuan 2.College of resources and {2.,Sichuan Agricultural University,Ya'an 62.014,Sichuan 3.School of Land and resources,china West Normal University,Nanchong 637002.Sichuan 4.institute of mountain Hazards and {2.,chinese academy of sciences and ministry of {12. Conservancy,chengdu 61004.,Sichuan)

A Vaisala CARBOCAP Hand-Held Carbon Dioxide Meter GM70 was used to measure CO 2.concentration in Tianquan cave of Xingwen world *** study was done in Tianquan cave during July and August,*** sources include the influence factors of distribution of CO 2.elevation,tourists,cross section and depth of the *** indicated tourists have strong impacts on the CO 2.concentration,while no significant differences could be found among different ***,significant correlation could be found among the depth of cave,the small cross section,the tourist's construction and the CO 2.*** results indicate that the CO 2.concentration in Tianquan cave has no threat to the health of *** results and the data provide a scientific basis for the protection of people's health and the exploitation of cave tourism.

关键词： Xingwen world Geopark Tianquan cave CO 2.concentration Influence factors

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川西北高原山地灾害垂直地带性

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山地学报 2006年第2期24卷 161-166页

作者：吴积善张信宝汪阳春中国科学院水利部成都山地灾害与环境研究所中国科学院水利部成都山地灾害与环境研究所四川成都61004.

由于形成山地灾害的多种自然因素具有垂直地带性,尤其作为主要动力因素的水,超过一定高度后由液态成为固态,从而也造成了山地灾害的垂直地带性,从高到低可分为冰雪型、冻融型和流水(含地下水)型等三个山地灾害垂直带,高低两带之间主体... 详细信息

由于形成山地灾害的多种自然因素具有垂直地带性,尤其作为主要动力因素的水,超过一定高度后由液态成为固态,从而也造成了山地灾害的垂直地带性,从高到低可分为冰雪型、冻融型和流水(含地下水)型等三个山地灾害垂直带,高低两带之间主体界线在川西北高原地区为4900m和3500m。各带均有其特有的山地灾害,其中冰雪型山地灾害主要有冰崩、雪崩、冰面湖崩决等;冻融型山地灾害有冻融土流、冻融滑塌、冻融坍塌、融冻泥流、寒冻岩屑流和冰湖溃决等;流水型山地灾害有滑坡、崩塌、泥石流、山洪、泥石流坝和滑坡坝溃决等。认清这些灾害分布的垂直地带性,对于在相应地带进行资源开发和经济建设时,避免、减轻或妥善处治其危害具有重要的现实意义。

关键词：川西北高原山地灾害垂直地带性

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Growth and Interactions of Multi-Source Perturbations in Convection-Allowing Ensemble Forecasts

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Journal of Tropical Meteorology 2024年第2期30卷 118-131页

作者：张璐闵锦忠庄潇然王世璋魏莉青 Key Laboratory of Meteorological Disaster of ministry of Education/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044 China Jiangsu Meteorological Observatory Jiangsu Meteorological ServiceNanjing 210008 China Nanjing Joint institute for Atmospheric sciences Nanjing 210000 China

This study investigated the growth of forecast errors stemming from initial conditions(ICs),lateral boundary conditions(LBCs),and model(MO)perturbations,as well as their interactions,by conducting seven 36 h convectionallowing ensemble forecast(CAEF)*** cases,one with strong-forcing(SF)and the other with weak-forcing(WF),occurred over the yangtze-Huai River basin(YHRB)in East china,were selected to examine the sources of uncertainties associated with perturbation growth under varying forcing backgrounds and the influence of these backgrounds on *** perturbations exhibited distinct characteristics in terms of temporal evolution,spatial propagation,and vertical distribution under different forcing backgrounds,indicating a dependence between perturbation growth and forcing background.A comparison of the perturbation growth in different precipitation areas revealed that IC and LBC perturbations were significantly influenced by the location of precipitation in the SF case,while MO perturbations were more responsive to convection triggering and dominated in the WF *** vertical distribution of perturbations showed that the sources of uncertainties and the performance of perturbations varied between SF and WF cases,with LBC perturbations displaying notable case ***,the interactions between perturbations were considered by exploring the added values of different source *** the SF case,the added values of IC,LBC,and MO perturbations were reflected in different forecast periods and different source uncertainties,suggesting that the combination of multi-source perturbations can yield positive *** the WF case,MO perturbations provided a more accurate estimation of uncertainties downstream of the Dabie {2. and need to be prioritized in the research on perturbation development.

关键词： convection-allowing ensemble forecast forcing background perturbation growth interactions added value

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Geochemical characteristics and environmental implications of loess sequences in the Loess Plateau

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High Technology Letters 2024年第3期30卷 310-321页

作者： zhang Jialin ZHAO zhongqiang XIA Dinghong LI Zhen{2. ZENG Liyuan HE Hongming SONG Yinxian CHEN zhong School of Land and resources Engineering Kunming University of Science and TechnologyKunming 650093P.R.China Key Laboratory of Geological Disaster Prediction and Early Warning and Ecological Protection and Restoration of Plateau mountain Ministry of Natural ResourcesKunming 650093P.R.China Yunnan Key Laboratory of Geological Disaster Prediction and Warning and Ecological Protection and Restoration of Plateau and mountain Kunming 650093P.R.China School of Geographical sciences East China Normal UniversityShanghai 200241P.R.China institute of Soil and water Conservation Ministry of Water ResourcesChinese Academy of SciencesYangling 712100P.R.China

The major,trace,and rare earth elements of the Duanjiapo(DJP)section in the south of the Loess Plateau,the Jiaxian(JX)section in the north,and the Jiuzhoutai(JZT)section in the west are *** results show that the main elemental characteristics of loess in three profiles are consistent with the upper continental crust(UCC).In terms of trace elements,Th,Nb,Zr,Hf,Y,Cs,W,Cr,V,Li,and Pb show relative enrichment compared with UCC;Rb,Ba,Sr and Be exhibit relative *** average ofΣREE is 171.91ppm with a negative anomaly forδEu and essentially no anomaly forδ*** results of K_(2.O/Na_(2.O,Rb/Sr ratios,as well as the leaching co-efficient from three profiles,indicate DJP>JX>JZT,suggesting that DJP experiences the strongest weathering leaching *** chemical index of alteration(CIA)reveals that all three profiles of loess are in the primary stage of Ca and Na *** is generally in the early to moderate stage of chemical weathering,while JX and JZT are both in the early stage.

关键词： loess chemical weathering element geochemistry chemical index of alteration(CIA)

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Optimization Design of Warping Dam in Wangjiagou, Shanxi Province

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Wuhan University Journal of Natural sciences 2003年第3B期8卷 1007-1011页

作者： zhang Yu, Cui Peng, Li Fa-bin, Wang Qinginstitute of {2. Hazards and environment. chinese academy of sciences, chengdu 61004., Sichuan, china institute of mountain Hazards and {2. Chinese Academy of Sciences Chengdu 610041 SichuanChina

This paper introduces the simulating design of warping dam in the Loess Plateau, western Shanxi province. On the basis of collected data, the digital elevation model in the studied area has been created. Utilizing GIS (geographical information system) technology, this paper achieves some environmental based results with the simulation method. Also based on the parameter model of precipitation, the tendency of warping sand has been calculated, aiming at providing academic basis for optimization design in the small watershed.

关键词： small watershed protective engineering GIS technology optimization

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