High-resolution lithospheric velocity structure of continental China and its geodynamic implications     

Haijiang Zhang  Hailiang Xin  Lei Gao  Rizheng He  Monica Maceir  Weisen Shen  Rob van der Hilst 《《地质学报》英文版》2018,92(Z1):113-113

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Photometric Properties and Stellar Parameters of the Rapidly Rotating Magnetic Early-B Star HD 345439     

Dong-Xiang Shen  Jin-Zhong Liu  Chun-Hua Zhu  Guo-Liang Lü  Yu Zhang  Cheng-Long Lü  Hao-Zhi Wang  Lei Li  Xi-Zhen Lu  Jin-Long Yu  Abdurepqet Rustem 《天文和天体物理学研究(英文版)》2023,(1):20-33

We first present the multicolor photometry results of the rapidly rotating magnetic star HD 345439 using the Nanshan One-meter Wide-field Telescope.From the photometric observations,we derive a rotational period of 0.7699±0.0014 day.The light curves of HD 345439 are dominated by the double asymmetric S-wave feature that arises from the magnetic clouds.Pulsating behaviors are not observed in Sector 41 of the Transiting Exoplanet Survey Satellite.No evidence is found of the occurrence of centrifug...  相似文献   

Design,Fabrication and Assembly of the Solar Upper Transition Region Imager(SUTRI)     

Zhanshan Wang  Jun Yu  Runze Qi  Chunling He  Zhengxiang Shen  Li Jiang  Weichen Gu  Jiali Wu  Zhe Zhang  Pengfeng Sheng  Yifan Wang  Yue Yu  Zeyi Ye  JingJing Xia  Yujie Xing  Hongfei Jiao  Bin Ma  Qiushi Huang  Zhong Zhang  Xianyong Bai  Yuanyong Deng  Hui Tian  Nange Wang  Lun Shen  Song Guo  Lei Jing  Xiaobo Chen  Yang Gao  Xiaocheng Zhu  Xiaofeng Zhang  Junwang He  Qi Shi  Shuo Liu  Xingzi Bi 《天文和天体物理学研究(英文版)》2023,(9):93-106

The Solar Upper Transition Region Imager(SUTRI) focuses on the solar transition region to achieve dynamic imaging observation of the upper transition region. In this paper, we report the optical system design, mechanical design, ultrasmooth mirror manufacture and measurement, EUV multilayer film coating, prelaunch installation and calibration for the SUTRI payload at IPOE, Tongji University. Finally, the SUTRI carried by the SATech-01satellite was successfully set to launch. All functions of thi...  相似文献   

The Tianlin Mission: A 6m UV/Opt/IR Space Telescope to Explore Habitable Worlds and the Universe     

Wei Wang  Meng Zhai  Gang Zhao  Shen Wang  Jifeng Liu  Jin Chang  Xuejun Zhang  Jihong Dong  Boqian Xu  Frank Grupp 《天文和天体物理学研究(英文版)》2023,(9):353-363

It is expected that ongoing and future space-borne planet survey missions including Transiting Exoplanet Survey Satellite(TESS), PLATO and Earth 2.0 will detect thousands of small to medium-sized planets via the transit technique, including over a hundred habitable terrestrial rocky planets. To conduct a detailed study of these terrestrial planets, particularly the cool ones with wide orbits, the exoplanet community has proposed various follow-up missions. The currently proposed European Space A...  相似文献   

Changes in air pollutants during the COVID-19 lockdown in Beijing:Insights from a machine-learning technique and implications for future control policy          下载免费PDF全文

Jiabao Hu  Yuepeng Pan  Yuexin He  Xiyuan Chi  Qianqian Zhang  Tao Song  Weishou Shen 《大气和海洋科学快报》2021,14(4):63-69

基于2015-2020年北京35个环境空气站和20个气象站观测资料,应用机器学习方法(随机森林算法)分离了气象条件和源排放对大气污染物浓度的影响.结果发现,为应对疫情采取的隔离措施使北京2020年春节期间大气污染物浓度降低了35.1％-51.8％;其中,背景站氮氧化物和一氧化碳浓度的降幅最大,超过了以往报道较多的交通站...  相似文献   

Urban planning construction land standard and its revision based on climate and topography in China     

XU Yong  ZHAO Shen  FAN Jie 《地理学报(英文版)》2021,31(4):603-620

Urban planning construction land standard is the technical specification for scientifically allocating various types of urban construction land, and it is the basis for drawing up and revising the overall urban planning scheme. Considering China's current urban planning construction land standard, many problems exist, such as the gap in the land use control threshold, the lack of regional differences in the climate revision, and failing to consider the topographic factors. To resolve these problems, this study proposed a step-by-step process framework and quantitative calculation method for the establishment and revision of standards in accordance with the principle of Total-Structure control. By setting the conditions, a universal basic standard for construction land was established. Quantitative analysis was then conducted on the relationship between the basic standard and the selected key indicators, such as urban population size, sunshine spacing coefficient, the width of river valleys or inter-montane basins, and terrain slope, among others. Finally, revised standards were formed for climate conditions, topography, and geomorphologic conditions, which were matched with the basic standards. The key results are three-fold:(1) The per capita construction land standard of 95 m~2/person can be used as the total indicator of China's urban planning basic standard, and the corresponding per capita single construction land comprises 32.50% of residential land, 7.42% of public management and public service land, 22.50% of industrial land, 17.50% of transportation facilities, 12.50% of green space, and 7.58% of other land-use types. The results of the revision of the urban population size indicate that the difference in population size has little effect on the total amount of per capita construction land.(2) The climate revision results of per capita residential land and per capita construction land in major cities reveal that the revised climate value varies greatly between north and south China. The revised climate values of the per capita area of construction land vary by latitude as follows: the value at 20°N is 93 m~2/person, the value at 30°N is 97 m~2/person, the value at 40°N is 103 m~2/person, and the value at 50°N is 115 m~2/person. The basic standard land value of 95 m~2/person is generally distributed across the Xiamen-Guilin-Kunming line.(3) The cities located in mountainous areas, hilly valleys, or inter-montane basins can reduce the allocation of community parks and comprehensive parks when the average width of an existing river valley or inter-montane basin is less than 2 km. When the average width of the valley or inter-montane basin is between 2 km to 4 km, the allocation of the comprehensive parks can be reduced. The revised results of per capita sloping construction land reveal that the terrain slope greatly affects the revised value of per capita construction land. Specifically, the revised value at 3° is 3.68% higher than the basic standard value, and the increase rates at 8°, 15°, and 25° are 11.25%, 26.49%, and 68.47%, respectively.  相似文献   

Structural Styles of the Longmenshan Thrust Belt and Evolution of the Foreland Basin in Western Sichuan Province, China   总被引：7，自引：0，他引：7  

Liu Hefu  Liang Huishe  Cai Liguo  Shen Fei China University of Geosciences  Beijing Jiang Minxi 《《地质学报》英文版》1994,68(4):351-372

The Longmenshan thrust system consists of two major groups of structural styles according to the depth of their involvement: basement thrusts-compressional fault blocks; fold-thrust system in the cover. In cross-section, the Longmenshan structural belt is divided into 5 zones. The propagation of the Longmenshan thrust system is piggy-back due to pushing at the early stage and overstep due to gravity sliding at the late stage. Balanced cross-sections and palinspastic reconstruction reveal that the total sliding displacement of the thrust system amounts to 120 km. The tectonic evolution of the Tethys domain in western Sichuan has experienced 5 stages: continental break-up; ocean-continent subduction ; continent-arc collision; orogenic thrusting; uplift of western Sichuan.  相似文献   

福建上杭盆地中生代火山岩首次发现开来石     

张之Shen  杨玲雅 《福建地质》1994,13(3):188-192

在１：５万上杭幅重砂野外调查中，在上杭盆地中生代火山岩河系中首次发现开来石。经中国地质大学Ｘ光单晶粉晶分析、桂林有色金属地质研究所电子探针成分分析结果，均与国外有关文献中的开来石相一致。是我省首次发现的含砷稀土矿物。它为在该区中生代火山岩中寻找稀土资源提供新的线索。此外该矿物常与黄金、辰砂等相伴生，笔者初步认为可以根据伴生金的相关元素Ａｓ开来石组合寻找金，是本区很值得注意的一种寻找金的方法。  相似文献   

钙钛矿型硅酸盐（Mg,Fe）SiO3矿物的光学吸收光谱     

Shen.  GY 胡文清 《国外地质与勘测》1995,(2):1-5,10

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EFFECTS OF ANOMALOUS HEATING ON SUMMER MONSOON OVER ASIA^*     

Shen Rujin  Ji Liren 《Acta Meteorologica Sinica》1991,5(5):564-576

Based on a zonally non-uniform mean circulation in summer simulated by numerical modelling,perturbation heatings ever South Asia and a perturbation cooling over Northwest Australia were incorporated in a numerical model to discuss their effects on summer monsoon over Asia and the structure of flow disturbance.  相似文献