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   

An analysis of the air parcel trajectories of long- range transport at shanghai     

Shao Demin  Zhang Wei  Shen Aihu  Cheng Xueqing  Fu Zhemin  He Zhenzhen 《大气科学进展》1992,9(3):346-350

CONCLUSION The analysis of air parcel trajectories affecting Shanghai indicates that the coming-direction of air parcel is different in various months. The transport track of trajectory (backward and forward) is closely related to the synoptic system, and also related to acid rain occurring in Shanghai region. Air pollution and acid rain in Shanghai region have relationship with both the influence of local pollutants and the influence of external pollutants from southwest and northeast.  相似文献   

论黄土高原区山地农田防护林的建设     

李英Shen 《自然资源》1992,5(2):57-61

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AN ANALYSIS ON THE STRUCTURE TYPES AND BENEFITS OF SLOPELAND AGROFORESTRY SYSTEMS-Taking the Three Gorge Reservoir Area As An Example     

Shen Yuancun  Leng Shuying  Zhang Yongtao 《地理学报(英文版)》1995,(4)

Chinahasalongltist0ryofaghcLIlturaldeveloPn1atn1edeveloPmatandLttilizahonofplanlsaremoreextensivethanthatofmotUAsinsandhills.Underthepressureofil11Promplivingstandardf0rl.2billionpeOPleatpresa1t,itistmdoubtedtoaCCeeratesl0PelanddeVeopmat.HOWdowerealizehig…  相似文献   

Public housing and migration: a multi-level modelling approach     

Boyle P  Shen J 《International journal of population geography : IJPG》1997,3(3):227-242

"This paper...[analyzes] the distance moved by one-year migrants using a multi-level modelling approach. Controlling for a range of socio-economic variables, derived from the 1991 British Census Sample of Anonymised Records (SAR), at both the individual and area level, the distance moved by household heads in public, privately rented and owner-occupied housing within Britain is assessed.... It is confirmed that migrants in public housing are less likely to migrate long distances than owner-occupiers and that the proportion of public housing in a SAR area, and the absolute reduction in public housing in a SAR area between 1981 and 1991, does not have a significant effect on the distance that in-migrants have moved."  相似文献   

On hydraulic falls of two-layer flow     

Xu Zhaoting  Lou Shunli  Tian Jiwei  Samuel Shan pu Shen 《海洋学报(英文版)》1996,15(2):179-191

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Relationship between deep-sea fish distributions and oceanic conditions of the East China Sea   总被引：2，自引：0，他引：2  

Shen Jin''ao 《海洋学报(英文版)》1994,13(4):535-550

Ｒｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｄｅｅｐ－ｓｅａｆｉｓｈｄｉｓｔｒｉｂｕｔｉｏｎｓａｎｄｏｃｅａｎｉｃｃｏｎｄｉｔｉｏｎｓｏｆｔｈｅＥａｓｔＣｈｉｎａＳｅａ￥ＳｈｅｎＪｉｎ＇ａｏ（ＲｅｃｅｉｖｅｄＮｏｖｅｍｂｅｒ１７，１９９３；ａｃｃｅｐｔｅｄ...  相似文献