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Short-Term Period Variation of Relative Sunspot Numbers

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Chinese Journal of Astronomy and Astrophysics 2007年第6期7卷 823-830页

作者： zhi-qiang yin Yan-Ben Han Li-Hua Ma Gui-Ming Le Yong-Gang Han National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites China Meteorological Administration Beijing 100081 Graduate School of Chinese Academy of Sciences Beijing 100049

We use wavelet transform to analyze the daily relative sunspot number series over solar cycles 10-23. The characteristics of some of the periods shorter than - 600-day are discussed. The results exhibit not only the variation of some short periods in the 14 solar cycles but also the characteristics and differences around solar peaks and valley years. The short periodic components with larger amplitude such as ～27, ～ 150 and ～360-day are obvious in some solar cycles, all of them are time-variable, also their lengths and amplitudes are variable and intermittent in time. The variable characteristics of the periods are rather different in different solar cycles.

关键词： Sun sunspots short-term period -- methods data analysis -- wavelet

A comparative study of the main factors controlling geohazards induced by 10 strong earthquakes in Western China since the Wenchuan earthquake in 2008

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China Geology 2023年第1期6卷 70-84页

作者： Chao Peng zhi-qiang yin Xu-jiao Zhang Hai Shao Ming-fei Pang China University of Geosciences(Beijing) Beijing 100029China China Institute of Geo-Environment Monitoring China Geological SurveyMinistry of Natural ResourcesBeijing 100081China China University of Geosciences Wuhan 430074China

Determining the main controlling factors of earthquake-triggered geohazards is a prerequisite for studying earthquake geohazards and post-disaster emergency *** studying these factors,the geomorphic and geological factors controlling the nature,condition,and distribution of earthquake-induced geohazards can be *** insights facilitate earthquake disaster prediction and emergency response *** authors combined field investigations and spatial data analysis to examine geohazards induced by seismic events,examining ten earthquakes including the Wenchuan,Yushu,Lushan events,to elucidate the main control factors of seismic *** authors observed that seismic geohazard occurrence is usually affected by many factors,among which active nature of the seismogenic fault,seismic peak ground acceleration(PGA),topographic slope and geomorphic height differences,and distance from the fault zone and river system are the most *** with strike-slip earthquakes,thrust earthquakes induce more high-altitude and high-speed remote landslides,which can cause great *** of 0°–40°are prone to secondary seismic geohazards,which are mainly concentrated 0–6 km from the river *** geohazards are not only related to seismogenic fault but also influenced by the associated faults in the earthquake *** maximum seismic PGA and secondary seismic geohazard number are positively correlated,and the horizontal and vertical ground motions play leading and promoting roles in secondary geohazard formation,*** the research,the spatial distribution of seismic geohazards is predicted,providing a basis for the formulation of emergency response plans following disasters.

关键词： Wenchuan earthquake Geohazards Main control factors Comparative study Geological disater survey engineering Western China

The properties of solar active regions responsible for ground level enhancements during solar cycles 22 and 23

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Research in Astronomy and Astrophysics 2013年第10期13卷 1219-1224页

作者： Gui-Ming Le Peng Li Hui-Gen Yang Yu-Lin Chen Xing-Xing Yang zhi-qiang yin National Center for Space Weather China Meteorological Administration SOA Key Laboratory for Polar Science Polar Research Institute of China Nanjing University of Information Science & Technology National Astronomical Observatories Chinese Academy of Sciences

This is a study designed to analyze the relationship between ground level enhancements（GLEs）and their associated solar active regions during solar cycles 22and *** show that 90.3%of the GLE events that are investigated are accompanied by X-class flares,and that 77.4%of the GLE events originate from super active *** is found that the intensity of a GLE event is strongly associated with the specific position of an active region where the GLE event *** a consequence,the GLE events having a peak increase rate exceeding 50%occur in a longitudinal range from W20 to ***,the largest GLE events occur in a heliographic longitude at roughly ***,an analysis is made to understand the distributional pattern of the Carrington longitude of the active regions that have generated the GLE events.

关键词： Sun:particle emission Sun:flares Sun:sunspots

Geological resources and environmental carrying capacity evaluation review,theory, and practice in China

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China Geology 2018年第4期1卷 556-565页

作者： Rui-min Li zhi-qiang yin Yi Wang Xiao-lei Li Qiong Liu Meng-meng Gao China Institute of Geo-Environment Monitoring Beijing 100081China Technical Guidance Center of Geological hazards Ministry of Natural ResourcesBeijing 100081China

Evaluations of resources and environmental carrying capacities (GRECC)are the premise of land space planning and use *** allocations and environmental capacity are the basic conditions that restrict development in a *** this paper,based on a systematic review of China's geological environment,groundwater resources,mineral resources,other geological resources and the environmental carrying capacity research status,the relationship between the natural resource environmental system and the socio-economic system is *** a "coordination theory of resources and environmental carrying"is ***,on the basis of an evaluation experiment performed at different scales and for different types of regions,the technical methods for an evaluation of the geological resources and environmental carrying capacity at the regional (inter-provincial)and provincial scales in China are established for the first *** paper presents a standardized method based on technical ideas, evaluation methods,and index systems for geological resource and environmental carrying capacity ***,an evaluation of the groundwater resource carrying capacity in China is used as an example for the demonstration of the groundwater resource background and use of state evaluation methods.

关键词： Geological environment Groundwater resources Resource and environment Carrying capacity Evaluation

Late Quaternary fluvial terrace formation in the Luan River drainage basin,north China and its possible linkages with climate change and tectonic activation

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China Geology 2023年第3期6卷 395-408页

作者： Yu-chen Tian Xu-jiao Zhang zhi-qiang yin Hai Shao Ming-xu Gu yingying-Ding Chao Peng Xiang-ge Zhang School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100083China China institute of Geo-Environment Monitoring China Geological SurveyMinistry of Natural ResourcesBeijing 100081China Hebei geological environment monitoring Institute Shijiazhuang 050021China

The Luan River is the most important water system in north-eastern Hebei Province,China and is located in the transitional zone of the Eastern Yan Mountains,North China Plain and Songliao *** well-developed river terraces of its tributary,the Yixun River,provide excellent information for studying neotectonics and climate *** are seven terraces in the lower reaches of the Yixun River,numbered *** optically stimulated luminescence dating results of 23 samples show that terraces T7-T2 formed at 111.36±5.83 ka,78.20±4.45 ka,65.29±4.15 ka,56.44±3.07 ka,40.08±2.66 ka,and 13.14±0.76 ka,respectively.A comparison with the oxygen isotope curves of deep-sea sediments reveals that the sediment formation of each terrace corresponded to cold periods of marine isotope stages MIS 4 and MIS 2 and the relatively cold periods of MIS 5e,MIS 3,and MIS *** the Late Pleistocene,the incision rate of the Yixun River has ranged from 0.371-1.740 mm/*** the formation of T7-T6,T5-T4,T4-T3,and T3-T2,the incision rate was ***,in the two stages during which T6-T5 and T2-T1 formed(13.14±0.76 ka to 0.58±0.08 ka and 10.79±0.64 ka to 0.16±0.01 ka),these rates reached 1.554 mm/a and 1.592-1.740 mm/a,*** approximately 30 ka,the activity of the Langying Fault increased,leading to footwall *** river gathered in the north of Langying to form the ancient Erdaowan Lake,which resulted in the drying of the river in the lower reaches of the Yixun River during the last glacial maximum without forming river *** the Early Holocene,headward erosion in the lower reaches of the Yixun River was enhanced,which resulted in the disappearance of the lake,and incised meandering formed due to increased *** on the analyses of river incision and the formation of ancient lakes and incised meandering,it was inferred that there have been three periods of strong tectonism in the river basin since the Late Pleistocene.

关键词： River terrace Paleoclimate change Tectonic activation Optically stimulated luminescence dating Marine isotope stage Last glacial maximum Neotectonics Geomorphology Geological survey engineering North China Plain

Geoeffectiveness of the coronal mass ejections associated with solar proton events

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Research in Astronomy and Astrophysics 2016年第1期16卷 117-128页

作者： Gui-Ming Le Chuan Li Yu-Hua Tang Liu-Guan Ding zhi-qiang yin Yu-Lin Chen Yang-Ping Lu Min-Hao Chen Zhong-Yi Li Key Laboratory of Space Weather National Center for Space Weather China Meteorological Administration Beijing 100081 China School of Astronomy and Space Science Nanjing University Xianlin Campus Nanjing 210046 China National Astronomical Observatories Chinese Academy of-Sciences Beijing 100012 China School of Mathematics and Statistics Nanjing University of Information Science and Technology Nanjing 210044China

The intensity-time profiles of solar proton events（SPEs） are grouped into three types in the present study. The Type-I means that the intensity-time profile of an SPE has one peak, which occurs shortly after the associated solar flare and coronal mass ejection（CME）. The Type-II means that the SPE profile has two peaks： the first peak occurs shortly after the solar eruption, the second peak occurs at the time when the CME-driven shock reaches the Earth, and the intensity of the second peak is lower than the first *** the intensity of the second peak is higher than the first one, or the SPE intensity increases continuously until the CME-driven shock reaches the Earth, this kind of intensity-time profile is defined as Type-III. It is found that most CMEs associated with Type-I SPEs have no geoeffectiveness and only a small part of CMEs associated with Type-I SPEs can produce minor（–50 n T ≤ Dst ≤–30 n T） or moderate geomagnetic storms（–100 n T≤ Dst ≤–50 n T）, but never an intense geomagnetic storm（–200 n T ≤ Dst 〈-100 n T）. However,most of the CMEs associated with Type-II and Type-III SPEs can produce intense or great geomagnetic storms（Dst ≤-200 n T）. The solar wind structures responsible for the geomagnetic storms associated with SPEs with different intensity-time profiles have also been investigated and discussed.

关键词： Sun: coronal mass ejections (CMEs) -- Sun: particle emission -- Sun: solar-terrestrial rela- tions

Effect of thermal treatment on energy dissipation of granite under cyclic impact loading

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Transactions of Nonferrous Metals Society of China 2019年第2期29卷 385-396页

作者： Rong-hua SHU Tu-bing yin Xi-bing LI zhi-qiang yin Li-zhong TANG School of Resources and Safety Engineering Central South UniversityChangsha 410083China Key Laboratory of Deep Coal Mine Excavation Response and Disaster Prevention and Control Anhui University of Science and TechnologyHuainan 232001China

High temperature treatment causes thermal damage to rocks in deep *** study the thermal effect on the energy dissipation of rocks during the dynamic cyclic loading,cyclic impact loading experiments of heat-treated rocks were carried out using the splitting Hopkinson pressure bar(SHPB)experimental *** correlations among the energy dissipation,energy dissipation rate,impact times,accumulated absorbed energy per volume,failure mode and temperature were *** results show that the reflected energy under the first impact increases and finally exceeds the absorbed energy when the temperature increases;however,the total reflected energy decreases above 200℃.The absorbed energy under the first impact and the total absorbed energy all decrease as the temperature increases,the rates of which decrease *** the same phenomenon appears for the transmitted energy and the rate of the transmitted *** the contrary,the rate of the reflected energy increases with the rising *** the temperature increases,the fewer impact times are needed to destroy the *** addition,the failure modes are different when the rock is treated at different temperatures;that is,when the temperature is high,even though the absorbed energy is low,the sample breaks into powder after several impacts.

关键词： energy dissipation granite cyclic impact compression thermal treatment

The migration of juvenile black carp,grass carp,silver carp and bighead carp from Yangtze River to Poyang Lake

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The migration of juvenile black carp,grass carp,silver carp ...

The migration of juvenile black carp,grass carp,silver carp and bighead carp from Yangtze River to Poyang Lake

第五届广东、湖南、江西、湖北四省动物学学术研讨会

作者： Mao-Lin Hu zhi-qiang Wu yin-Lan Liu (School of Life Sciences Nanchang University Nanchang 330031)

The black carp(Mylopharyngodon piceus),grass carp(Ctenopharyngodon idellus),silver carp (Hyprphthalmichthys molitrix) and bighead carp(Aristichthys nobilis) are the four major Chinese carps, and the main species for f... 详细信息

关键词： Migration Juvenile Four major Chinese carps Yangtze River Poyang Lake

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The migration of juvenile black carp,grass carp,silver carp ...