稻田不同水分管理方式对土壤线虫群落的影响

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利用6,6-环戊烷基富烯与芳基锂作用形成的取代环戊二烯基锂,与双(环戊二烯基)四氯-μ-氧合二钛反应这一新的合成方法,制备了(η~5-环戊二烯基)[η~5-(1-(4-甲氧基苯基)环已烷基)环戊二烯基]二氯化钛(I).元素分析、核磁、红外、质谱分析确认合成产物为

Third-order Stokes wave solutions for interfacial internal waves in a three-layer density-stratified fluid

Interfacial internal waves in a three-layer density-stratified fluid are investigated using a singular method, and third-order asymptotic solutions of the velocity potentials and third-order Stokes wave solutions of the associated elevations of the interfacial waves are presented based on the small amplitude wave theory. as expected, the third-order solutions describe the third-order nonlinear modification and the third-order nonlinear interactions between the interfacial waves. The wave velocity depends on not only the wave number and the depth of each layer but also on the wave amplitude.

山东东营凹陷浊积岩油藏形成机制及预测技术

More and more exploration practises and research results prove that deep-water turbidites and slump turbidites in abrupt slope belt as well as slump turbidites in deposit center are favorable places to find subtle reservoirs. Based on sedimentology, sequence stratigraphy, tectonics and petroleum geology and with the tool of computer, this paper focused a set of questions such as the forming mechanism and m&a of turbidite reservoir in Dongying Sag, and obtained a systematic research result from available information of geology, seismic survey, well logging and testing, etc. Since the structural pattern and tectonic stress are controlling factors on distribution of turbidite reservoirs, deep-water sequence and shallow-water sequence have close relation with various turbidites. The author primarily disclose the regular pattern of the turbidites in the abrupt slope trouth, and predict that the abrupt slope is mainly connected to near-bank slump turbidite fans and deep-water turbidite fans; whereas the depocenter area usually developed with front delta slump fans. According to this, seismic-geology models corresponding to various deposit systems can be set up as a principle for predicting the turbiditea in faulted lacustrine basins. Based on comprehensive study of the turbidite reservoir forming condition and main controlling factors, a differential accumulation model and a multiple migration&accumulation model were also set up for abrupt slope turbidities. Referenced the m