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| 1 | Restoring urbanization process in China in the 1990s by using non-radiance-calibrated DMSP/OLS nighttime light imagery and statistical data显示文摘Since current administrative unit-based urban land area statistical data in China lack enough spatial information, the urbanization process re- search at large scale cannot be effectively supported. Based on the current administrative unit-based urban land area statistical data in China, a new approach to quickly and cheaply derive urban land information from the non-radiance-calibrated Defense Meteoro- logical Satellite Program/ Operational Linescan Sys- tem (DMSP/OLS) nighttime light imagery is pre- sented in this paper. With the new approach, the ur- ban pattern information in China in 1992, 1996 and 1998 was derived with the urbanization processes in China in the 1990s restored by using the non-ra- diance-calibrated DMSP/OLS nighttime imagery. The accuracy assessment based on the statistical data showed that the relative error between the derived total urban land area and the statistical data at na- tional scale was less than 2% in 1992, and less than 1% in 1996 and 1998, and the maximum relative er- ror at province scale do not exceed 10% with most of the provinces less than 3%. In addition, the urban patterns derived from the high-resolution Landsat TM imagery were compared with those from the DMSP/ OLS data. The results showed that the urban pattern characteristics derived from DMSP/OLS were basi-cally coincident with those from TM imagery with the total accuracy of about 80%. Thus it can be seen that our restored urbanization process in China in the 1990s by using the non-radiance DMSP/OLS night- time imagery can be accepted and can represent the actual urban development in China at that time on the whole. | HE Chunyang SHI Peijun LI dinggang CHEN din PAN Yaozhong LI ding ZHUO Li Ichinose Toshiaki | 2006 | Chinese Science Bulletin2006，51，13： | 55 |
| 2 | Deep water bottom current deposition in the northern South China Sea显示文摘There are some active bottom currents on the northern continental slope of the South China Sea (SCS). Reflection seismic profiles show that the bottom current channels occur in the water depth range of 1000 to 2700 m,extending from the NE to the SW,leading to accumulation of discontinuous drifts with higher sedimentation rates on the eastern side of the channel. The stacking pattern of the layers sug-gests that these drifts propagated southwestward,following the direction of the bottom currents. One sedimentary drift to the southeast of the Dongsha Islands has the highest sedimentation rate of 97cm/ka in the last 12 ka. The sedimentary characteristics of the sediment layers indicate that these bottom currents are most likley caused by the water movement of a branch of the West Pacific Ocean Current,which enters the northern SCS via the Bashi Strait. Once formed,the bottom currents trans-port sediments along the northern slope of SCS southwestward and finally disappear into the central basin of the SCS. Due to the bottom current activity,the deep-sea sedimentary process in the northern SCS is complex. | SHAO Lei LI XueJie GENG JianHua PANG Xiong LEI YongChang QIAO PeiJun WANG LiaoLiang WANG HongBin | 2007 | Science China Earth Sciences2007，50，7： | 43 |
| 3 | Climate change regionalization in China(1961–2010)显示文摘Since climatic condition is the important foundation for human subsistence and development and the key factor in sustainable development of economy and society, climate change has been a global issue attracting great attentions of politicians, scientists, governments, and the public alike throughout the world. Existing climate regionalization in China aims to characterize the regional differences in climate based on years of the mean value of different climate indexes. However, with the accelerating climate change nowadays, existing climate regionalization cannot represent the regional difference of climate change, nor can it reflect the disasters and environmental risks incurred from climate changes. This paper utilizes the tendency value and fluctuation value of temperature and precipitation from 1961 to 2010 to identify the climate change quantitatively, and completes the climate change regionalization in China(1961–2010) with county administrative regionalization as the unit in combination with China's terrain feature. Level-I regionalization divides China's climate change(1961–2010) into five tendency zones based on the tendency of temperature and precipitation, which are respectively Northeast China-North China warm-dry trend zone, East China-Central China wet-warm trend zone, Southwest China-South China dry-warm trend zone, Southeast Tibet-Southwest China wet-warm trend zone, and Northwest China-Qinghai-Tibet Plateau warm-wet trend zone; level-II regionalization refers to fourteen fluctuation regions based on level-I regionalization according to the fluctuation of temperature and precipitation. | SHI PeiJun SUN Shao WANG Ming LI Ning WANG JingAi JIN YunYun GU XiaoTian YIN WeiXia | 2014 | Science China Earth Sciences2014，57，11： | 22 |
| 4 | ACP-based social computing and parallel intelligence: Societies 5.0 and beyond显示文摘 | XiaoWang Lingxi Li Yong Yuan Peijun Ye Fei-Yue Wang | 2016 | CAAI Transactions on Intelligence Technology2016，1，4： | 21 |
| 5 | Developing land use scenario dynamics model by the integration of system dynamics model and cellular automata model显示文摘Modeling land use scenario changes and its potential impacts on the structure and function of the ecosystem in the typical regions are helpful to understanding the interactive mechanism between land use system and ecological system. A Land Use Scenario Dynamics (LUSD) model by the integration of System Dynamics (SD) model and Cellular Automata (CA) model is developed with land use scenario changes in northern China in the next 20 years simulated in this paper. The basic idea of LUSD model is to simulate the land use scenario de-mands by using SD model at first, then allocate the land use scenario patterns at the local scale with the considerations of land use suitability, inheritance ability and neighborhood effect by using CA model to satisfy the balance between land use scenario demands and supply. The application of LUSD model in northern China suggests that the model has the ability to reflect the complex behavior of land use system at different scales to some extent and is a useful tool for assessing the potential impacts of land use system on ecological system. In addition, the simulated results also indicate that obvious land use changes will take place in the farming-pastoral zone of northern China in the next 20 years with cultivated land and urban land being the most active land use types. | HE Chunyang, SHI Peijun, CHEN Jin, Li Xiaobing, PAN Yaozhong, LI Jing, LI Yuechen & LI Jinggang Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of China, Beijing Normal University College of Resources Science & Technology, Beijing Normal University, Beijing 100875, China | 2005 | Science China Earth Sciences2005，48，11： | 21 |
| 6 | Degradation of pyrene by immobilized microorganisms in saline-alkaline soil显示文摘Biodegradation of polycyclic aromatic hydrocarbons(PAHs) is very difficult in saline-alkaline soil due to the inhibition of microbial growth under saline-alkaline stress.The microorganisms that can most effectively degrade PAHs were screened by introducing microorganisms immobilized on farm byproducts and assessing the validity of the immobilizing technique for PAHs degradation in pyrene-contaminated saline-alkaline soil.Among the microorganisms examined,it was found that Mycobacterium sp.B2 is the best,and can degrade 82.2% and 83.2% of pyrene for free and immobilized cells after 30 days of incubation.The immobilization technique could increase the degradation of pyrene significantly,especially for fungi.The degradation of pyrene by the immobilized microorganisms Mucor sp.F2,fungal consortium MF and co-cultures of MB+MF was increased by 161.7%(P < 0.05),60.1%(P < 0.05) and 59.6%(P < 0.05) after 30 days,respectively,when compared with free F2,MF and MB+MF.Scanning electron micrographs of the immobilized microstructure proved the positive effects of the immobilized microbial technique on pyrene remediation in salinealkaline soil,as the interspace of the carrier material structure was relatively large,providing enough space for cell growth.Co-cultures of different bacterial and fungal species showed different abilities to degrade PAHs.The present study suggests that Mycobacterium sp.B2 can be employed for in situ bioremediation of PAHs in saline-alkaline soil,and immobilization of fungi on farm byproducts and nutrients as carriers will enhance fungus PAH-degradation ability in saline-alkaline soil. | Shanxian Wang Xiaojun Li Wan Liu Peijun Li Lingxue Kong Wenjie Ren Haiyan Wu Ying Tu | 2012 | Journal of Environmental Sciences2012，24，9： | 19 |
| 7 | Measurement of ecological capital of Chinese terrestrial ecosystem based on remote sensing显示文摘The biosphere of the Earth is essential to human survival and development. The services of ecosystems are critical to the functioning of the Earth’s life-support system. They contribute to human welfare both directly and indirectly. Ecological capital refers to the sum of the direct biological resources value and the indirect ecosystem services value. It is necessary to estimate the ecological capital in order to bring it to the society and market economic system, and draw the social attention to ecological environment constructions. An estimation model for eco-logical capital based on remote sensing is presented in this paper. The parameters in the model are quantitatively measured using NOAA/AVHRR and other ancillary data, including the land cover types, the vegetation coverage, and the vegetation net primary productivity (NPP) of ter-restrial ecosystem. Based on the economic parameters in previously published studies and a few original calculations, the annual ecological capital of the entire terrestrial ecosystem of China is quantitatively estimated at 6.44 trillion (1012) yuan (RMB), and the spatial distribution of the eco-logical capital is also analyzed. Traditional ecological methods to ecological capital measurement are based on homogeneous plot scales, and the regional scaling is a key problem in their appli-cations. As the proposed remote sensing approach, it provides a new method to ecological capital measurement completely based on observation data. It can not only overcome the re-gional scaling problem easily, but also allows the ecological capital to be estimated objectively and spatial-explicitly. | PAN Yaozhong SHI Peijun ZHU Wenquan GU Xiaohe FAN Yida LI Jing | 2005 | Science China Earth Sciences2005，48，6： | 14 |
| 8 | The effects of ischemia-reperfusion injury and hepatic artery ischemia on CD14 expression in canine auto-transplantation livers显示文摘Objective: To study the effect of ischemia-reperfusion injury(IRI) and hepatic artery ischemia(HAI) on CD14 expression in canine auto-transplantation livers. Methods:Liver orthotopic auto-transplantation models were applied with 30 healthy male Xi’an canines which were randomly divided into a control group, simultaneous reperfusion(SR) group and HAI group. CD14 protein expression, Malonaldehyde (MDA) Contents in hepatic tissues and ALT values in serum were detected, and the pathological changes of hepatic tissues was investigated under the light microscopy. Results:The level of CD14 protein expression in SR and HAI group tended to be time-dependent and both higher than controls with statistical significance(P < 0.01); The peak values of these two groups both occurred at 4 h, but the level in HAI group (11.94± 0.43) was evidently higher than that in SR group(3.04± 0.34). MDA contents in liver tissue, ALT values in serum and pathological changes showed the same changing tendency as CD14 expression. Conclusion:① Up-regula- tion of CD14 expression may be the receptor-mechanism of Kupffer cells(KCs) activation in liver transplantation. ② HAI can up- regulate CD14 expression after portal vein reperfusion, improve the activity of KCs further more, increase OFRs production and coop- erate with portal reperfusion, and finally aggravate the grafts injury. | Jinkai Xu Yiming Li Peijun Ye | 2008 | Journal of Nanjing Medical University2008，22，3： | 13 |
| 9 | Monitoring urban land cover and vegetation change by multi-temporal remote sensing information显示文摘In order to analyze changes in human settlement in Xuzhou city during the past 20 years, changes in land cover and vegetation were investigated based on multi-temporal remote sensing Landsat TM images. We developed a hierarchical classifier system that uses different feature inputs for specific classes and conducted a classification post-processing approach to improve its accuracy. From our statistical analysis of changes in urban land cover from 1987 to 2007, we conclude that built-up land areas have obviously increased, while farmland has seen in a continuous loss due to urban growth and human activities. A NDVI difference approach was used to extract information on changes in vegetation. A false change information elimination approach was developed based on prior knowledge and statistical analysis. The areas of vegetation cover have been in continuous decline over the past 20 years, although some measures have been adopted to protect and maintain urban vegetation. Given the stability of underground coal exploitation since 1990s, urban growth has become the major driving force in vegetation loss, which is different from the vegetation change driven by coal exploitation mainly before 1990. | DU Peijun LI Xingli CAO Wen LUO Yan ZHANG Huapeng | 2010 | Mining Science and Technology2010，20，6： | 10 |
| 10 | The urbanization process of Bohai Rim in the 1990s by using DMSP/OLS data显示文摘This paper firstly derived urban information from Defense Meteorological Satellite Program/Operational Linescan System (DMSP/OLS) data in 1992, 1996 and 1998 with the support of statistical data, and then developed three basic urban models of polygon-urbanization, line-urbanization and point-urbanization in urban agglomerations from viewpoint of spatial analysis. The conclusions are as follows: (1) Urban patch numbers in the Bohai Rim increased from 1659 to 2053 with an annual average increase number of about 66. Meanwhile, the small urban patches accounted for a larger proportion in the region and the patch density increased fast. In addition, the urban barycenter of the region showed a moving trend toward northwest from 1992 to 1998. Urbanization in the Bohai Rim in the 1990s is fast and obvious. (2) Urbanization in the Bohai Rim can be reflected by three basic processes, i.e., the polygon-urbanization around the big cities, the line-urbanization around the transportation lines and the point-urbanization emerging in large areas. Of them, the polygon-urbanization has been in dominance. It is obviously within an effective range of 3-4 km surrounding the urban patches. The line-urbanization and point-urbanization in the region was relatively small, both of which showed an obvious increasing trend. | HE Chunyang LI Jinggang CHEN Jing SHI Peijun CHEN Jin PAN Yaozhong LI Jing ZHUO Li Ichinose Toshiaki | 2006 | Journal of Geographical Sciences2006，16，2： | 9 |
| 11 | Understanding cultivated land dynamics and its driving forces in northern China during 1983-2001显示文摘Based on the long-term serial NOAA/NDVI dataset during 1983-1999 and SPOT/VGT datasetin 2001,the land use/cover change information in the 13 provinces of northern China was extracted based on the analysis ofthe cultivated landscape characteristics atfirst,then the effects of human activitieson cultivated land processwere explored by GIS and the driving forcesofcultivated land change were investigated.The conclusionscan be drawn asfollows:(1)The constantincrease of weak ecologicalfunction land asdesertand cultivated land and the decrease ofthe ecologicalfunction land offorestand shrub were the main characteristicsofthe land use/coverchange in the 13 provinces from 1983 to 1999,which showed the effects on the ecologicaladjustmentfunction.However,such situations were changed to some extentin the 2000s because of the eco-construction policy of the government.(2)From 1983 to 2001,the Barycenterofcultivated land tended to move from northeast to southwest with the topography and transportation situations being the main influences on the cultivated land distribution.Itis found thatthe cultivated land use intensity decreased noticably with the increase ofdistance from the main communication arteries.(3)The improvementofthe people’s living standard is closely related with the cultivated land change.The structural adjustment in the agriculturalland caused by economicdevelopmentand the improvementofthe people’sliving standard isan importantfactoraffecting thecultivated land changein northern Chinafrom 1983 to 2001. | HE Chunyang LI Jinggang WANG Yuanyuan SHI Peijun CHEN Jin PAN Yaozhong | 2005 | Journal of Geographical Sciences2005，15，4： | 8 |
| 12 | INVERSE MEDIUM SCATTERING PROBLEMS IN NEAR-FIELD OPTICS显示文摘一个调整递归的 linearization 方法为散布在近地的光学产生的问题的二维的反的媒介被开发,它重建从通过光子扫描可存取的数据在同类的底层上扔的不同类的媒介的 scatterer 通道显微镜学实验。除了散布问题的逆的 ill-posedness,二个困难从分层的背景媒介和有限的孔数据产生。基于散布数据的多重频率,从相应于在低频率的弱散布的出生的近似的方法开始,每更改被解决 Helmholtz 方程的一个前面的问题和问题伴随问题关于波浪数字经由递归的 linearization 获得。数字实验被包括说明建议方法的可行性。 | Gang Bao Peijun Li | 2007 | Journal of Computational Mathematics2007，25，3： | 7 |
| 13 | A novel microwave absorber——BaAl_2Fe_(10)O_(19)/poly(m-toluidine) composite:Preparation and electromagnetic properties显示文摘BaFe10Al2O19 /poly(m-toluidine)(BFA/PMT) composites were synthesized by in-situ polymerization of m-toluidine in the presence of BaFe10Al2O19 particles.The structure,composition and morphology of the obtained samples were characterized by using XRD,FT-IR,UV-visible spectroscopy,SEM and TEM techniques.Their electrical conductivity,magnetic property and microwave absorbing property were measured by the four-probe meter,the vibrating sample magnetometer and the vector network analyzer,respectively.The results indicated that BFA particles were coated effectively by PMT polymer and some interactions between PMT and BFA particles existing in the composites.The conductivity of BFA/PMT composite is smaller than that of pure polymers and its saturation magnetization is a little smaller than that of pure BFA.The influence of the constitution and film thickness of absorbent on its microwave absorbing property is evident.The microwave absorbing properties of the BFA/PMT composites are better than those of pure BFA and PMT.When optimizing the mass rate of BFA/PMT to 0.3,the absorbent with 2 mm film thickness has the minimum reflection loss of 28.26 dB at approximate 14.24 GHz,and the maximum available bandwidth of 8.8 GHz,respectively.The results show that these composites can be used as advancing absorption and shielding materials due to their favorable microwave absorbing property. | CHEN KeYu XU QingQing LI LiangChao GONG PeiJun CHEN HaiFeng XIAO QiuShi Xu Feng | 2012 | Science China Chemistry2012，55，7： | 4 |
| 14 | Discovery of the ancient Ordovician oil-bearing karst cave in Liuhuanggou,North Tarim Basin,and its significance显示文摘A typical ancient karst cave is found in the Yijianfang Formation of Ordovician at Liuhuanggou,North Tarim Basin.With an entrance of 4.8 m wide and 20 m high,the Liuhuanggou ancient karst cave extends to NW 315° and has been filled by sediments,which can be classified into three types according to their nature and origin:clastic sediments(gravels),chemical sediments(palaeotravertine),and mixed sediments.Among them,the Paleotravertine and gravels are most common.The palaeotravertine is laminated type and yellowish brown or black in color due to oil inside.When saturated with oil,the palaeotravertine is black.Under microscope,oil mainly accumulates in the cracks between calcite crystals.The filling period of the Liuhuanggou karst cave can be divided into three stages:mixed filling,chemical filling,and clastic(palaeotravertine breccia) filling.Numerous fractures are distributed on one side of the karst cave.The fractures can be as wide as 40 cm and over 40 m long.Fractures of different periods and sizes constitute a fracture network and are all filled with calcite veins.Oil can be found inside the fractures.In the chemical fillings,sulfur is also found,which can indicate the magma influence on karst caves.The existence of sulfur also confirms that the Liuhunggou karst cave was formed in ancient times rather than recently or nowadays.Different from normal sedimentary limestone,the ancient Liuhuanggou karst cave has a distinct isotope fractionation and the depletion of heavy carbon and oxygen isotope.Controlled by the northwest oriented vertical strike-slip shear fault,the karst cave is actually a dissolved vertical fault belt. | ZHONG JianHua MAO Cui LI Yong LI Yang YUAN XiangChun NIU YongBin CHEN Xin HuANG ZhiJuan SHAO ZhuFu WANG PeiJun LI Jia ZHANG DanFeng | 2012 | Science China Earth Sciences2012，55，9： | 4 |
| 15 | Disaster Risk Science:A Geographical Perspective and a Research Framework显示文摘In this article,we recall the United Nations’30-year journey in disaster risk reduction strategy and framework,review the latest progress and key scientific and technological questions related to the United Nations disaster risk reduction initiatives,and summarize the framework and contents of disaster risk science research.The object of disaster risk science research is the'disaster system'consisting of hazard,the geographical environment,and exposed units,with features of regionality,interconnectedness,coupling,and complexity.Environmental stability,hazard threat,and socioeconomic vulnerability together determine the way that disasters are formed,establish the spatial extent of disaster impact,and generate the scale of losses.In the formation of a disaster,a conducive environment is the prerequisite,a hazard is the necessary condition,and socioeconomic exposure is the sufficient condition.The geographical environment affects local hazard intensity and therefore can change the pattern of loss distribution.Regional multi-hazard,disaster chain,and disaster compound could induce complex impacts,amplifying or attenuating hazard intensity and changing the scope of affected areas.In the light of research progress,particularly in the context of China,we propose a threelayer disaster risk science disciplinary structure,which contains three pillars(disaster science,disaster technology,and disaster governance),nine core areas,and 27 research fields.Based on these elements,we discuss the frontiers in disaster risk science research. | Peijun Shi Tao Ye Ying Wang Tao Zhou Wei Xu Juan Du Jing'ai Wang Ning Li Chongfu Huang Lianyou Liu Bo Chen Yun Su Weihua Fang Ming Wang Xiaobin Hu Jidong Wu Chunyang He Qiang Zhang Qian Ye Carlo Jaeger Norio Okada | 2020 | International Journal of Disaster Risk Science2020，11，4： | 4 |
| 16 | Nd isotopic variations and its implications in the recent sediments from the northern South China Sea显示文摘The chondrite-normalized REE distribution patterns in recent sediments from the northern South China Sea and surrounding areas are similar, with the HREE values being almost equal to or slightly higher, and the LaN/LuN ratio being lower, than PAAS standards. However, samples from the Xijiang River, a major branch of the Pearl River system, show opposite trends, i.e., with slightly lower HREE values and higher LaN/LuN ratio than PAAS. The distribution of Nd isotopes in sediments from the northern South China Sea was controlled by the Pearl River and the inshore area of South China, respectively. The volume of εNd(0) from inshore areas of southern China is apparently higher than that from the Pearl River, and εNd(0) values in offshore sediments and Taiwan Island are between these values. The results clearly show that εNd(0) volume in the northeastern South China Sea is higher than in the southwest part of the northern South China Sea, indicating different source rock types. The main source rock of the Pearl River sediment is carbonate types and affects sediment deposition in the southwest of the northern South China Sea, while the source rock in the inshore area of southern China, mainly Mesozoic and Cenozoic granites, contributes to sediments in the northeastern area of the northern South China Sea. Due to different source rock types, the HREE values and the volume of εNd(0) in recent sediments supplied by the inshore area of southern China are higher than those from the Pearl River. Over 80% of the rapidly accumulated sediments on the northern slope of the South China Sea in the southeast of Dongsha Islands area were derived from Taiwan Island and from inshore areas of South China, with only less than 20% from the Pearl River. | SHAO Lei QIAO PeiJun PANG Xiong WEI GangJian LI QianYu MIAO WeiLiang LI Ang | 2009 | Chinese Science Bulletin2009，54，2： | 3 |
| 17 | 普通玉米、糯玉米和蒸汽压片玉米对生长猪能量和营养物质消化率的影响显示文摘研究的目的是通过饲喂生长猪普通玉米、糯玉米和蒸汽压片玉米来测定其消化能、代谢能和营养物质的表观消化率。 | 朱秋凤 张永静 温春雨 徐作鹏 Dongli Ma Juntao Li Chengfei Huang Fengjuan Yang Yi Wu Ling Liu Wei Jiang Zhicheng Jia Peijun Zhang Xuezhen Liu Shuai Zhang | 2021 | 猪业科学2021，38，3： | 3 |
| 18 | Scientific challenges of research on natural hazards and disaster risk显示文摘As a discipline,the science of natural hazards and disaster risk aims to explain the spatial-temporal pattern,process and mechanism,emergency response and risk mitigation of natural hazards,which requires a multidisci-plinary and interdisciplinary approach.With the support of Natural Science Finance of China(NSFC)and Chinese Academy of Sciences(CAS),in-depth research and systematic analysis on natural hazards and disaster risk were conducted.In this paper,the state of the art in research on natural hazards is summarized from seven aspects:formation process,mechanism and dynamic of natural hazards,disaster risk assessment,forecast,monitoring and early warning,disaster mitigation,emergency treatment and rescue,risk management and post-disaster re-construction.The trends within the natural hazards and disaster risk as a discipline were identified,along with existing shortcomings and significant gaps that need to be addressed.This paper highlighted:1)the scientific challenges including the frontier scientific issues and technological gaps on natural hazards and disaster risk dis-cipline from 2025 to 2035 in China,and 2)the proposal to develop a systemic and holistic natural hazards and disaster risk discipline. | Peng Cui Jianbing Peng Peijun Shi Huiming Tang Chaojun Ouyang Qiang Zou Lianyou Liu Changdong Li Yu Lei | 2021 | Geography and Sustainability2021，2，3： | 3 |
| 19 | Evaluation of Shale Reservoir Quality by Geophysical Logging for Shuijingtuo Formation of Lower Cambrian in Yichang Area, Central Yangtze显示文摘Taking the shale of Shuijingtuo Formation of Lower Cambrian in Yichang area as the research object,the shale reservoir characteristics are comprehensively evaluated and classified by fitting regression and formula calculation method in this study,using laboratory testing and geophysical logging data.The results show that the interpretation data of ECS(elemental capture spectroscopy)logging has a high correlation with the measured minerals data,which can be a good method to evaluate the minerals component of the shale.The calculated content of brittle minerals at the lower part of Shuijingtuo Formation is the relatively highest,generally more than 40%,which is the most favorable segment for fracturing.The correlation coefficient between the interpretation data of CMR(combinable nuclear magnetic resonance)logging and the result of laboratory porosity test is 0.97,which can effectively and accurately evaluate the reservoir porosity.The evaluation results show that the porosity of the lower member of Shuijingtuo Formation is generally greater than 3%,while that of the upper member is generally less than 3%.The lower segment is with the relative optimal physical conditions.There is a good correlation between the acoustic logging data and the gas bearing content testing results.A gas bearing content evaluation model is established.The results show that the gas bearing content of the lower 20 m shale is generally more than 2%,indicating that the lower part is a shale gas enrichment segment.Mechanical parameters such as Young modulus,Poisson ratio and brittleness index of shale reservoir are evaluated by using the logging data of P-wave time difference and S-wave time difference.The continuous 15 m shale at the lower part is with the relatively optimal low Poisson ratio,high Young modulus and high brittleness index,developing the optimum brittle condition.Based on the evaluation and classification of above parameters,the shale is divided into three types.The TypeⅠis the optimal,mainly located at the bottom.Its thickness is 8.5 m in total.The TypeⅡmainly develops at the middle part.The TypeⅢis the worst,mainly at the upper part. | Xiaohong Chen Lin Chen Shu Jiang An Liu Shengyuan Luo Hai Li Peijun Li Ping Chen | 2021 | Journal of Earth Science2021，32，4： | 3 |
| 20 | Surface Rainfall and Cloud Budgets Associated with Mei-yu Torrential Rainfall over Eastern China during June 2011显示文摘Surface rainfall and cloud budgets associated with three heavy rainfall events that occurred over eastern China during the mei-yu season in June 2011 were analyzed using 2D cumulus ensemble model simulation data. Model domain mean rainfall showed three peaks in response to three prescribed ascending motion maxima, primarily through the mean moisture convergence during the torrential rainfall period. Prescribed ascending motion throughout the troposphere produced strong convective rainfall during the first(9 June) and third(17–18 June) rainfall events, whereas strong prescribed ascending motion in the mid and upper troposphere and weak subsidence near the surface generated equally important stratiform and convective rainfall during the second rainfall event(14 June). The analysis of surface rainfall budgets reveals that convective rainfall was associated with atmospheric drying during the first event and moisture convergence during the third event. Both stratiform and convective rainfall responded primarily to moisture convergence during the second event. An analysis of grid data shows that the first and third mean rainfall maxima had smaller horizontal scales of the precipitation system than the second. | ZHAI Guoqing LI Xiaofan ZHU Peijun SHEN Hangfeng ZHANG Yuanzhi | 2014 | Advances in Atmospheric Sciences2014，31，6： | 2 |
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