凹陷

Assuming fluid is and viscid and slightly compressible, bubble collapse near rigid boundary and free surface is simulated, displaying characteristics such as formation, penetration and impact of reentrant jet as well as vortex ring and bubble rebound.

采用粘性、微可压流体模型，数值模拟了空泡在刚性边界和自由面附近溃灭及空泡溃灭后流动的发展，显示了空泡溃灭过程中的凹陷射流形成、空泡贯穿、射流冲击、涡环的形成和空泡回弹等流动特征，提出空泡回弹的另一种机制是凹陷射流冲击形成的旋涡。

Erlian basin belongs to a Mesozoic continental fault group, in which various types of sedimentary bodies could all be found, especially the fan delta and underwater fan sedimentary bodies occurred in steep-sided sections of sags.

二连盆地属于中生代陆相断陷群，各凹陷发育多种类型的沉积体，特别是扇三角洲和水下扇沉积体普遍发育于凹陷陡带，具备形成岩性油藏的诸多有利条件。

According to the theory that the shape of seal rock control petroleum to migrate along with ridge, ray-tracing technique is adopted to forward hydrocarbon migration pathway. This technique advanced fluid potential by combining source sag and energy field.

东部凹陷中段为一常温常压盆地，运用流体势分析油气运聚意义不大，根据封闭面底部形态控制油气脊运移原理，本次研究采用射线追踪技术正演油气运聚路径，该技术基于油气二次运移的相对能量行为进行油气运移路径的三维分析，将生烃凹陷与能量场结合起来，是对流体势分析技术的重要改进。

Daily production circumstances, be it hand-mounted or mounted automatic mechanical, it is inevitable that mounted are not allowed to occur, in order to prevent the phenomenon of mounted non-business card printing after dangersous them…we projecting edges appear, usually in the phenomenon of hkd250 based on the characteristics of the product, the business card printing for side gauges and padding on the edges of the former syndiospecific 3-6 mm overlap at the ends of the cutting, which mounted, the non-business card printing dangersous them…we edges appropriate to carry out some mm sonagraph mounted to effectively prevent non-business card printing dangersous them…we projecting edges appear and which would ensure the accuracy of the die-cutting.

常日不入产环境暗示，不论是手工裱贴或板滞被迫裱贴，都不免会呈现裱贴禁绝本体，为避免裱贴后的否制卡背的端方纸边呈现凹陷本体，凡是在制卡时不离给根据产物的特点，不兵制卡半制品的侧规和后规纸边增不收3—6mm不相等的修边余量，这样裱贴时，不兵否制卡背的端方纸边不分往边伸众少毫米举行裱贴，可灵验不天避免否制卡背的端方纸边呈现凹陷本体，包管产物模切的不确。

Purpose:To determine the normal ranges of the depth of the anterior and posterior rims of foramen occipital magnum and the angle between medulla oblongata and the upper spinal cord on midsagittal MRI in normal Chinese idividuals and patients with basilar impression,to study their clinical significance and to provide normal reference in diagnosing basilar invagination by MRI.

目的：利用颅脑正中矢状面MRI自旋回波或快速自旋回波T_1WI图像测量颅颈交界区正常的中国人和颅底凹陷症患者枕大孔前、后缘中点深度和延髓-上颈髓轴线夹角数值，评价其正常值范围，探讨其发育规律及临床意义，为MRI诊断颅底凹陷症提供直接的参考标准。

The Qaidam Basin northwest reason located at the Qaidam Basin northeast, on the tectonic element belongs to the Qaidam Basin first-level tectonic element vast cliff to be hollow, the Cainozoic Era hollow stable growth, has deposited the great thick this time stratum, under dwarf Luo Tong, does Chai Gouzu to deposit up and down the heavy film hydrocarbon source rock.

柴西北缘位于柴达木盆地西北部，构造单元上属于柴达木盆地一级构造单元——茫崖凹陷，中新生代凹陷稳定发育，沉积了巨厚的这一时期地层，其中中下侏罗统、上下干柴沟组沉积厚层的烃源岩。

It occupies an area of 12 384 km^2, stretching from the north of Minbu Basin to the south of Chindwin Basin.

研究区D区块位于缅甸中部，包括钦敦凹陷北部和沙林凹陷南部，面积12384km^2.D区块以南分布有许多油田。

Recent discovery of a large natural gas field in the northern slope of Baiyun Depression demonstrates its great resource potential in the huge lacustrine source kitchen in the Eogene of Baiyun Depression.

白云凹陷北坡大型天然气田的发现也证实了白云凹陷下第三系巨厚湖相烃源岩的资源潜力。

The master source rocks of the Dongying Depression consist of the Upper Sha 4 and the Lower Sha 3 Members, and the oil and gas pools mainly distributed in the Eogene(accounting for 91%)are dominated by lithological, structural anticline and fault block ones.

渤海湾盆地南北紧邻的东营凹陷和沾化凹陷二者在烃源岩组成和油气藏分布等方面存在显著的差异性。

The Well Fu 1 is a regional exploration well in Fula Depression , M Basin, in which the high production commercial oil was obtained.

穆格莱德盆地福拉凹陷是在中非剪切带剪切应力场背景下形成的以中生代沉积为主的裂谷凹陷，裂陷活动可分为早白垩世、晚白垩世和古近纪3个阶段，主要形成南北和北西-南东走向两组断裂。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。