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动词词库模型之解释力
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作者 贡献 《解放军外国语学院学报》 2000年第2期18-21,共4页
汉语生成语法学者引用黑尔和凯泽提出的英语中的动词论元结构来诠释汉语事实 ,颇具创意。运用这种动词词库模型 ,分析一价动词句、施—动—受句、主宾易位句、双宾语句、得字句、频次补语句、时量补语句、整体—部分句等 8种结构 ,并分... 汉语生成语法学者引用黑尔和凯泽提出的英语中的动词论元结构来诠释汉语事实 ,颇具创意。运用这种动词词库模型 ,分析一价动词句、施—动—受句、主宾易位句、双宾语句、得字句、频次补语句、时量补语句、整体—部分句等 8种结构 ,并分析了Move α、把字结构、动词再分析、动词复叠等 4种变化的不同映现 。 展开更多
关键词 动词词库模型 move-α 把字结构 动词再分析 动词复叠
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The Impact of Diferent Vertical Difusion Schemes in a Three-Dimensional Oil Spill Model in the Bohai Sea 被引量:10
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作者 李燕 朱江 王辉 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2013年第6期1569-1586,共18页
Vertical transport is critical to the movement of oil spills in seawater. Breaking waves play an important role by developing a well-defined mixing layer in the upper part of the water column. A three-dimensional (3-... Vertical transport is critical to the movement of oil spills in seawater. Breaking waves play an important role by developing a well-defined mixing layer in the upper part of the water column. A three-dimensional (3-D) Lagrangian random walk oil spill model was used here to study the influence of sea surface waves on the vertical turbulence movement of oil particles. Three vertical diffusion schemes were utilized in the model to compare their impact on oil dispersion and transportation. The first scheme calculated the vertical eddy viscosity semi-empirically. In the second scheme, the vertical diffusion coefficient was obtained directly from an Eulerian hydrodynamic model (Princeton Ocean Model, POM2k) while considering wave- caused turbulence. The third scheme was formulated by solving the Langevin equation. The trajectories, percentages of oil particles intruding into water, and the vertical distribution structures of oil particles were analyzed for a series of numerical experiments with different wind magnitudes. The results showed that the different vertical diffusion schemes could generate different horizontal trajectories and spatial distributions of oil spills on the sea surface. The vertical diffusion schemes caused different water-intruding and resurfacing oil particle behaviors, leading to different horizontal transport of oil particles at the surface and subsurface of the ocean. The vertical diffusion schemes were also applied to a realistic oil spill simulation, and these results were compared to satellite observations. All three schemes yielded acceptable results, and those of the third scheme most closely simulated the observed data. 展开更多
关键词 oil spill Lagrangian random walk Langeven equation oil particles vertical turbulence move- ment
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A new insight into the nature of seasonal variations in coordinate time series of GPS sites located near active faults
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作者 Sergey V. TROFIMENKO Victor G. BYKOV +2 位作者 Nikolay V. SHESTAKOV Nikolay N. GRIB Hiroaki TAKAHASHI 《Frontiers of Earth Science》 SCIE CAS CSCD 2016年第3期560-569,共10页
This study provides new insights into the nature of seasonal variations in coordinate time series of GPS sites located near active faults and methods of their modeling. Monthly averaged coordinate time series were ana... This study provides new insights into the nature of seasonal variations in coordinate time series of GPS sites located near active faults and methods of their modeling. Monthly averaged coordinate time series were analyzed for several pairs of collocated GPS sites situated near the active fault intersection area, in close proximity to the central part of the northern boundary of the Amurian plate and the vicinity of the San Andreas Fault zone. It is concluded that the observed seasonal variations are best described by a breather function which is one of the solutions of the well-known sine-Gordon equation. The obtained results suggest that, in this case, the source of seasonal variations may be caused by the appearance of solitary strain waves in the fault intersection system, which may be qualitatively treated as standing waves of compression-extension of the geological medium. Based on statistical testing, the limits of applicability of the suggested model have been established. 展开更多
关键词 space geodetic surveys oscillatory move-ments of crustal blocks seasonal variations Amurianmicroplate
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Using repeated precise gps campaigns for research of present-day crustal movement and strain in the Qinghai-Tibetan Plateau 被引量:8
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作者 LIU Jingnan XU Caijun +3 位作者 SONG Chenghua SHI Chuang JIANG Weiping DONG Lixiang 《Chinese Science Bulletin》 SCIE EI CAS 2001年第8期694-698,共5页
The problem of crustal movement in the Qing-hai-Tibetan Plateau is a hotstopic of the present-day international geodetic world. GPS observations in 1993, 1995 and 1997 are used to survey the three-dimensional displace... The problem of crustal movement in the Qing-hai-Tibetan Plateau is a hotstopic of the present-day international geodetic world. GPS observations in 1993, 1995 and 1997 are used to survey the three-dimensional displacement of GPS monitoring station in the Qinghai-Tibetan Plateau, and to calculate and analyze the present-day crustal movement and strain in the Qinghai-Tibetan Plateau. The result of repeated campaign shows that the crustal movement in the Qinghai-Tibetan Plateau is still compressing in the north and south directions, extending in the west and east directions, and uplifting in the vertical direction. The relative convergence velocity of the Himalayan block is approximately (19.5±1.7)mm/a, the strain velocity is about (5.5±6.0) mm/a, and the uplifting velocity is some (7.6±5.2) mm/a. The compression velocity of the Tibet block relative to Golmud in the north and south directions is (9.3±4.6) mm/a, the strain velocity of the middle part in the west and east directions is (15.6±6.3) mm/a, 展开更多
关键词 GPS SURVEYING Qinghai-Tibetan Plateau CRUSTAL move- ment STRAIN analysis.
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Characteristics of Water Infiltration in Layered Water-Repellent Soils 被引量:2
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作者 LI Yi REN Xin +2 位作者 Robert HILL Robert MALONE ZHAO Ying 《Pedosphere》 SCIE CAS CSCD 2018年第5期775-792,共18页
Water-repellent(WR) soil greatly influences infiltration behavior. This research determined the impacts of WR levels of silt loam soil layer during infiltration. Three column scenarios were utilized, including homogen... Water-repellent(WR) soil greatly influences infiltration behavior. This research determined the impacts of WR levels of silt loam soil layer during infiltration. Three column scenarios were utilized, including homogeneous wettable silt loam or sand, silt loam over sand(silt loam/sand), and sand over silt loam(sand/silt loam). A 5-cm thick silt loam soil layer was placed either at the soil surface or 5 cm below the soil surface. The silt loam soil used had been treated to produce different WR levels, wettable, slightly WR, strongly WR, and severely WR. As the WR level increased from wettable to severely WR, the cumulative infiltration decreased. Traditional wetting front-related equations did not adequately describe the infiltration rate and time relationships for layered WR soils. The Kostiakov equation provided a good fit for the first infiltration stage. Average infiltration rates for wettable, slightly WR, strongly WR, and severely WR during the 2 nd infiltration stage were 0.126, 0.021, 0.002, and 0.001 mm min^(-1) for the silt loam/sand scenario,respectively, and 0.112, 0.003, 0.002, and 0.000 5 mm min^(-1) for the sand/silt loam scenario, respectively. Pseudo-saturation phenomena occurred when visually examining the wetting fronts and from the apparent changes in water content(?θ_(AP)) at the slightly WR,strongly WR, and severely WR levels for the silt loam/sand scenario. Much larger ?θAPvalues indicated the possible existence of finger flow. Delayed water penetration into the surface soil for the strongly WR level in the silt loam/sand scenario suggested negative water heads with infiltration times longer than 10 min. The silt loam/sand soil layers produced sharp transition zones of water content. The WR level of the silt loam soil layer had greater effects on infiltration than the layer position in the column. 展开更多
关键词 infiltration model layered soils ponded infiltration experiment pseudo-saturation soil water content soil water move-ment soil water repellency water drop penetration time
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