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Constrained fitting of faulted bedding planes for three-dimensional Geological modeling

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Constrained fitting of faulted bedding planes for three-dime...

中国科学院地质与地球物理研究所2.02.术年会

作者： Da’ an liu Juming Zhang Sijing Wang key laboratory of Engineering Geomechanics,{2. of Geology and Geo{3., chinese academy of sciences,beijing 10002.,People’ s Republic of China

Structural surfaces such as bedding planes and faults are the most important information for studying a geological *** engineering investigation,this information mainly comes from a limited number of discrete data by field artificial investigation and borehole *** effective utilization of the limited exploration data and more accurate reconstruction of complex geological body, a three-dimensional(3.) fitting function method that can satisfy positional and directional constraints is presented in this paper.A unified fitting function is established for fitting a group of faulted bedding planes with the consideration of local discontinuities due to ***,the effectiveness of this method is demonstrated through a 3. virtual geological modeling on the background of a hydroelectric project of western China in planning.©2.02.Published by Elsevier Science ltd.

关键词： Three dimensional geological modeling Fitting function Fault Strata Bedding plane

Effects of mechanical perturbation and water on the growth of Psammochloa villosa in the windy semiarid Mu Us Sandland

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Effects of mechanical perturbation and water on the growth o...

第三届全国植物生态学前沿论坛第三届全国克隆植物生态学研讨会

作者： Yan-Hong Wang~(1,2.,Wei-Ming He~(1,*),Fei-Hai Yu~1,Ming Dong~(1,*),Hong Jiang~2.Shu-Quan Yu~2.Xi-Qiao lin~2.1 State key laboratory of Vegetation and Environmental Change,{2. of Botany,chinese academy of sciences,beijing 100093.China 2.Zhejiang Forestry University,Hangzhou 3.13.0,China

The Mu Us Sandland is characterized by water shortage and *** mechanical perturbation(MP) induced by wind is ubiquitous in this area,the interactions between water and MP are *** studies have revealed that soil water and MP have different,even opposite effects on *** we hypothesized that the MP effects on perennial grasses might be suppressed by increased soil water in inland dune *** seedlings of Psammochloa villosa were subjected to two levels of MP(non-MP versus MP 60 s d-1) and two levels of water supply(2.0 ml d-1 versus 400 ml d-1).MP significantly decreased plant height, leaves,total biomass,and root/shoot ratio;increased soil water significantly enhanced leaves,total biomass,and root/shoot *** interactions between MP and water on the height and root/shoot ratio were *** findings indicate:(1) that MP is a stressful factor for plant growth in terms of biomass,and its effects on *** can be partially suppressed by increased soil water;(2. that changes in height and root/shoot ratio may facilitate plants to cope with arid and windy environments.

关键词： Growth and allocation Perennial grass Soil water Suppression Thigmomorphogenesis

Relationship between erosion and sediment yield in drainage basins of loess gully-hilly areas

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Journal of Geographical sciences 2001年第1期11卷 71-79页

作者： CHEN Hao (institute of Geographic sciences and Natural Resources Research, CAS, {2. 100101, China) institute of Geographic sciences and Natural Resources Research CAS Beijing China

From a long-term point of view, the balance between erosion and sediment yield in a drainage system can basically realize, i.e., the delivery ratio can be close to 1. However, substantial variations among individual rainfall events or between annual delivery ratio exist, causing frequent sediment retaining or re-erosion and re-delivery of the retained sediments in a short period of time. Thus the delivery ratio will be 1 or > 1. The sediment delivery ratio is closely related to the spatial distribution of rainfall and magnitude of rise and fall of peak flood and that of runoff depth in the drainage system. Delivery ratio of single event in a drainage system and changes of delivery capacity of silt-laden runoff in various classes of gullies can be expressed by transformation mechanism of shear force of a single rainstorm event with flood resulting from increase and decrease of peak flood per unit area.

关键词： delivery ratio interaction flood and geomorphology dynamic mechanism rainstorm flood

Revisiting the sodium-ion storage capability of hard carbon in carbonate-based electrolytes via a sodium-metal-free protocol

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Science China Chemistry 2024年第7期67卷 2240-2247页

作者： Gaopan liu Yanbing Mo Jiawei Chen Yu Peng xiao Zhu Fei Wang xiaoli Dong Yongyao Xia Department of Chemistry and Shanghai key laboratory of Molecular Catalysis and Innovative Materials Institute of New EnergyLaboratory of Advanced MaterialsFudan UniversityShanghai 200438China

Common evaluation methodology of sodium(Na)-containing two-electrode or three-electrode configurations overlooks the interference from highly reactive Na metal,leading to the underestimation or inconsistent performance of low-potential hard carbon(HC)***,the trap of Na metal was systematically investigated with or without applied current,uncovering its inadequacy as the reference or counter electrode in different configurations.A Na-metal-free three-electrode protocol is proposed for evaluating the actual Na^(+)-storage capability of the typical low-potential HC *** avoiding Na crosstalk and precisely controlling the working electrode's potential,the actual electrochemical performance of HC in the carbonate esterbased electrolyte can be recognized with high capacity of 2.2.mAh g^(-1)at 2.C and 113.mAh g^(-1)at 5 C,correcting the misunderstanding of the inferior performance of HC in coin-type half cells(68%and 50%undervaluation at 2.C and 5 C,respectively).The advanced protocol is expected to reduce misunderstandings or underestimation due to evaluation methods and to guide the development of high-performance battery materials.

关键词： highly reactive sodium potential drift carbonate ester sodium-metal-free protocol sodium storage capability

Triterpenoid Saponins from Clematis tangutica

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chinese Chemical letters 1999年第5期10卷 391-394页

作者： Hui Min ZHONG Chang Xiang CHEN Xuan TIAN Yu Xin CfIUI Yao ZuCHEN(Department of Chemistry. State key laboratory of Applied Organic Chemistry.lanzhou University. lanzhou 73.00Kunming {2. of Botany.The {3. of sciences of China, Kunming 63.2.4Dep lanzhou Univ Dept Chem State Key Lab Appl Organ Chem Lanzhou 730000 Peoples R China chinese Acad Sci Kunming Inst Bot Kunming 650204 Peoples R China Zhejiang Univ Dept Chem Hangzhou 310027 Peoples R China beijing Univ Med Sci Coll Pharm Beijing 100083 Peoples R China

Two new triterpenoid saponins, tanguticoside A and B were isolated from aerial part of Clematis tangutica. Their structures were elucidated as 3.O-beta-D-glucopyranosyl hederagenin 2. O-alpha-l-rhamnopyranosyl- (1-->4)-beta-D-glucopyranosyl- (1-->6)-beta-D-glucopyranosidel and 3.O-beta-D-glucopyranosyl ranosyl- (1-->2.-beta-D-glucopyranosyl hederagenin 2.-O-alpha-l-rhamnopyranosyl- (1-->4)-beta-D-glucopyranosyl- (1-->6)-beta-D-glucopyranoside2. respectively.

关键词： Clematis tangutica ranunculaceae triterpenoid saponins hederagenin tanguticoside A and B

late Mesozoic extensional tectonics in the North China Block:a crustal response to subcontinental mantle removal?

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Late Mesozoic extensional tectonics in the North China Block...

中国科学院地质与地球物理研究所2.06学术年会

作者： WEI lIN and QINGCHEN WANG State key laboratoiy of lithosphenc Evolution,institute of Geology and Geo{2.,{3.,beijing 1002.,China

In the North China block,Cretaceous extensional tectonics is expressed by numerous syntectonic plutons bounded by ductile normal faults and several metamorphic core complexes (MCC).Cretaceous half-grabens filled by continental terrigeneous deposits are *** examples of MCC from South liaoning Peninsula,Yiwul(u|¨)shan,Hohhot as well as the Yunmengshan syntectonic pluton spread along ca 2.00 km suggest that the early Cretaceous extensional tectonics in the North China Block is globally *** geodynamics setting of this continental-scale extension remains *** is not satisfactorily explained by back-arc rifting related to the Paleo-Pacific subduction or crustal "unthickening".Mantle lithosphere removal is,however,*** of asthenosphere may be the origin of heat advection and fluid transfer from mantle to lower crust,thus triggering the Cretaceous magmatism,crustal softening and diffuse continental *** possible lithosphere-scale models,such as convective removal of mantle lithosphere and detachment of a large piece of mantle,are discussed.

关键词： Continental extension Synkinematic plutonism Metamorphic core complex Half-grabens lithosphere delamination Cretaceous North China Block

A Novel Non-uniform Two-section DFB Semiconductor laser for Wavelength Tuning

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A Novel Non-uniform Two-section DFB Semiconductor Laser for ...

亚太地区通信会议暨光电子通信会议

作者： Zhao Yanrui, Wang Wei, Zhuang Wanru, Zhang Jingyuan, Zhu Hongliang, Wangxiaojie, Zhou Fan, Ma Chaohua(National Research Center for Optoelectronic Technology, institute of Semiconductors,{2., {3. 100083.State key laboratory of Integrated Optoelectronics, institute of Semiconductors,{2., {3. 100083.

A novel wavelength tunable DFB laserwish two non-uniform sections is reported.A 4nmcontinuous wavelength tuning range and *** discrete wavelength tuning range wereachieved using only one control-current,withSMSR over ...

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Smart materials for safe lithium-ion batteries against thermal runaway

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Journal of energy Chemistry 2024年第7期94卷 360-392页

作者： Yu Ou Pan Zhou Wenhui Hou xiao Ma Xuan Song Shuaishuai Yan Yang lu Kai liu Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

In recent years,the new energy storage system,such as lithium ion batteries(lIBs),has attracted much *** order to meet the demand of industrial progress for longer cycle life,higher energy density and cost efficiency,a quantity of research has been conducted on the commercial application of ***,it is difficult to achieve satisfying safety and cycling performance *** may be thermal runaway(TR),external impact,overcharge and overdischarge in the process of battery abuse,which makes the safety problem of lIBs more *** this review,we summarize recent progress in the smart safety materials design towards the goal of preventing TR of lIBs reversibly from different abuse *** from smart responsive materials and novel structural design,the safety of lIBs can be improved a *** expect to provide a comprehensive reference for the development of smart and safe lithium-based battery materials.

关键词： lithium ion batteries(lIBs) Thermal runaway(TR) Smart materials Safe batteries Solid electrolyte interface(SEI)

Changes in sediment transport in the Kuye River in the loess Plateau in China

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International Journal of Sediment Research 2009年第2期24卷 201-213页

作者： Jueyi SUI1,Yun HE2.and Cheng lIU3.1 Associate Professor,Environmental Engineering Program,University of Northern British Columbia,Prince George,BC,Canada,V2. 4Z9 2.Senior Engineer,China {3. of Water Resources and Hydropower Research,No. A-1,Fuxing Rd.,beijing 10003.,China Ph.D 3.International Research and Training Center on Erosion and Sedimentation,2. Chegongzhuang West Rd.,beijing 100048,China Ph.D,Prof. [a]Environmental Engineering Program University of Northern British Columbia Prince George BC Canada V2N 4Z9 [b]China Institute of Water Resources and Hydropower Research No. A-1 Fuxing Rd. Beijing 100038 China [c]International Research and Training Center on Erosion and Sedimentation 20 Chegongzhuang West Rd. Beijing 100048 China

In this paper,the changes in sediment transport over 51 years from 1955 to 2.06 in the Kuye River in the loess Plateau in China are assessed. key factors affecting sediment yield and sediment transport,such as precipitation depth,discharge,and human activities are studied. To investigate the changes in sediment yield in this watershed,a trend analysis on sediment concentration,precipitation depth,and discharge is conducted. Precipitation depths at 2.Climate Stations(CSs) ,as well as discharge and sediment transport at 3.Gauging Stations(GSs) are used to assess the features of sediment transport in the Kuye River. The runoff modulus(defined as the annual average discharge per unit area,l/(***2. ) and the sediment transport modulus(defined as the annual suspended sediment transport per unit area,t/(yr km2. ) are introduced in this study to assess the changes in runoff and sediment yield for this watershed. The results show that the highest average monthly discharge during the study period in the Kuye River is 66.2. m3.s in August with an average monthly sediment concentration of 88.9 kg/m3. However,the highest average monthly sediment concentration during the study period in the Kuye River is 12..3. kg/m3.and occurs in July,which has an average discharge of 42.6 m3.s that is much less than the average monthly discharge in August. It is found that both the runoff modulus and sediment transport modulus at Wenjiachuan GS on the Kuye River has a clear downward trend. During the summer season from July to August,the sediment transport modulus at Wenjiachuan GS is much higher than those at Toudaoguai and longmen GSs on the Yellow River. The easily erodible loess in the Kuye River watershed and the sparse vegetation are responsible for the extremely high sediment yield from the Kuye River watershed. The analyses of the grain size distribution of suspended load in the Kuye River are presented. The average monthly median grain size of suspended load in the Kuye River is large

关键词： Grain size distribution Kuye River loess Plateau Precipitation Runoff modulus Sediment transport modulus Soil erosion Yellow River