设计单因素变量试验,考察双排料管下排气式旋风分离器的关键运行参数分离器进口气体速度vc、入口固气质量比ω、喷嘴内环气体速度vb对分离器进口-排料管压力损失ΔP1、ΔP2,分离器进口-排气管压力损失ΔP3,分离效率η,漏气率δ的影响。...设计单因素变量试验,考察双排料管下排气式旋风分离器的关键运行参数分离器进口气体速度vc、入口固气质量比ω、喷嘴内环气体速度vb对分离器进口-排料管压力损失ΔP1、ΔP2,分离器进口-排气管压力损失ΔP3,分离效率η,漏气率δ的影响。结果表明:vc是影响分离器压力分布的主要因素,随着vc由14.4 m/s增大到25.4 m/s,ΔP3从0.70 k Pa增大至2.12 k Pa,η从85.4%增大至89.5%,δ逐渐增大;随着ω的增加,ΔP1、ΔP2显著减小,ω为0.08是ΔP1、ΔP2降低幅度减小的转折点;当vb小于14.0 m/s时,随着vb增大,δ大幅度减小;当vb过高时,严重影响系统的流场分布,δ变为负值,同时η减小至85.9%。展开更多
目的:探讨行体外受精/卵胞浆内单精子显微注射-胚胎移植(IVF/ICSI-ET)助孕双胚胎移植后的双绒毛膜三胎减灭为双绒毛膜双胎妊娠的围产期结局。方法:回顾性分析2016年1月至2019年6月于郑州大学第三附属医院生殖中心行IVF/ICSI-ET助孕双胚...目的:探讨行体外受精/卵胞浆内单精子显微注射-胚胎移植(IVF/ICSI-ET)助孕双胚胎移植后的双绒毛膜三胎减灭为双绒毛膜双胎妊娠的围产期结局。方法:回顾性分析2016年1月至2019年6月于郑州大学第三附属医院生殖中心行IVF/ICSI-ET助孕双胚胎移植后早孕超声诊断为双绒毛膜三胎妊娠,其中选择减灭单绒毛膜双胎(MCT)中一个胚胎的患者24例(MCT组),同时从生殖中心电子病历系统中随机筛选相同时间节点内IVF/ICSI-ET助孕双胚胎移植后早孕超声诊断为双绒毛膜双胎妊娠的48例患者作为对照(非MCT组)。比较两组患者的围产期结局差异,并采用Logistic回归分析,调整患者年龄、BMI、抗米勒管激素(AMH)、不孕年限等混杂因素,分析阴道超声引导下减灭双绒毛膜三胎妊娠中MCT的一个胚胎成为双绒毛膜双胎妊娠对其围产期结局的影响。结果:MCT组自然减胎率高于对照组(P=0.044)。与非MCT组相比,MCT组双胎活产新生儿出生体重有下降趋势,但差异无统计学意义(P=0.073);MCT组的新生儿5 min Apgar评分低于非MCT组(P=0.004),新生儿住院率高于非MCT组(P=0.017)。在调整混杂因素后,发现该减胎方式不影响其围产期结局(P>0.05)。结论:选择阴道超声引导下减灭双绒毛膜三胎妊娠中MCT的一个胚胎成为双绒毛膜双胎妊娠,尽管自然减胎率较高,但与双胚胎移植后双绒毛膜双胎妊娠相比,对其围产期结局无影响。展开更多
The Putaohua Oilfield is a fault-prolific area and the faults have close relation with structural traps. The genetic models of the structural traps in the Putaohua Oilfield can be divided into two types： individual f...The Putaohua Oilfield is a fault-prolific area and the faults have close relation with structural traps. The genetic models of the structural traps in the Putaohua Oilfield can be divided into two types： individual fault model and multi-fault interaction model. This is based on the description of displacement distribution of typical individual normal faults, the geometry of the footwall and hanging wall, and the analysis of the interaction between faults and the corresponding change in geometry when the faults grow. The individual fault model is that the displacement reaches a maximum at or near the center of fault and decreases toward the fault tips, so a half-graben is formed on the hanging wall of the fault and a half- anticline is formed on the footwall because of the isostatic process. The multi-fault interaction model is that during the growth of faults, they overlap and interact with each other, and accommodation zones are formed in the overlapping segments. The accommodation zones are favorable targets for hydrocarbon exploration, and the trap characteristics are dependent The multi-fault interaction model can be subdivided on the extent of overlap and occurrence of faults. into three types： synthetic accommodation zone, convergent accommodation zone and divergent accommodation zone. Hydrocarbon migration and accumulation models of each type have been developed. The hydrocarbon migration and accumulation models of the traps with different genetic models have their own characteristics in the different stages of fault growth.展开更多
The relationship between deposition and tectonics of sedimentary basins has been a significant subject in recent years.Using typical rift basins such as the Nanpu Sag as an example,combined with the analysis of the te...The relationship between deposition and tectonics of sedimentary basins has been a significant subject in recent years.Using typical rift basins such as the Nanpu Sag as an example,combined with the analysis of the tectonics-palaeogeomorphology of basins,we undertook a detailed study of the differences of the third-order sequences in different basins,the combination of depositional systems within the sequence framework and the distribution of depocenters and subsidence centers.Our results revealed a significant relationship between the tectonics-palaeogeomorphology of rift basins and the filling styles of sedimentary sequences.The basin structure plays a primary role in controlling the development of the third-order sequences and the boundary of these sequences is easily formed in basins with gentle slopes,shallow water and a small area.The characteristics of the tectonics-palaeogeomorphology of rift basins are dominated by half-grabens of extensional faults,which affect the temporal and spatial combination of sedimentary systems within the sequences as well as the distribution of depocenters and subsidence centers.Based on the development rules of the faults dominating the half-grabens of extensional faults,rift basins are classified into two types： the single fault segmented-linkage type and the multi-fault combination type.The main controlling factors of the temporal and spatial combination of sedimentary systems and the distribution of depocenters and subsidence centers in different basins are different.The characteristics of early segmentation and later linkage of the faults play a critical role in controlling the sedimentary system combination within the sequence framework and the temporal and spatial differences of depocenters and subsidence centers of the single fault segmented-linkage rift basins,while the differences in fault activities are the dominating factors of the multi-fault combination rift basins.展开更多
文摘设计单因素变量试验,考察双排料管下排气式旋风分离器的关键运行参数分离器进口气体速度vc、入口固气质量比ω、喷嘴内环气体速度vb对分离器进口-排料管压力损失ΔP1、ΔP2,分离器进口-排气管压力损失ΔP3,分离效率η,漏气率δ的影响。结果表明:vc是影响分离器压力分布的主要因素,随着vc由14.4 m/s增大到25.4 m/s,ΔP3从0.70 k Pa增大至2.12 k Pa,η从85.4%增大至89.5%,δ逐渐增大;随着ω的增加,ΔP1、ΔP2显著减小,ω为0.08是ΔP1、ΔP2降低幅度减小的转折点;当vb小于14.0 m/s时,随着vb增大,δ大幅度减小;当vb过高时,严重影响系统的流场分布,δ变为负值,同时η减小至85.9%。
文摘目的:探讨行体外受精/卵胞浆内单精子显微注射-胚胎移植(IVF/ICSI-ET)助孕双胚胎移植后的双绒毛膜三胎减灭为双绒毛膜双胎妊娠的围产期结局。方法:回顾性分析2016年1月至2019年6月于郑州大学第三附属医院生殖中心行IVF/ICSI-ET助孕双胚胎移植后早孕超声诊断为双绒毛膜三胎妊娠,其中选择减灭单绒毛膜双胎(MCT)中一个胚胎的患者24例(MCT组),同时从生殖中心电子病历系统中随机筛选相同时间节点内IVF/ICSI-ET助孕双胚胎移植后早孕超声诊断为双绒毛膜双胎妊娠的48例患者作为对照(非MCT组)。比较两组患者的围产期结局差异,并采用Logistic回归分析,调整患者年龄、BMI、抗米勒管激素(AMH)、不孕年限等混杂因素,分析阴道超声引导下减灭双绒毛膜三胎妊娠中MCT的一个胚胎成为双绒毛膜双胎妊娠对其围产期结局的影响。结果:MCT组自然减胎率高于对照组(P=0.044)。与非MCT组相比,MCT组双胎活产新生儿出生体重有下降趋势,但差异无统计学意义(P=0.073);MCT组的新生儿5 min Apgar评分低于非MCT组(P=0.004),新生儿住院率高于非MCT组(P=0.017)。在调整混杂因素后,发现该减胎方式不影响其围产期结局(P>0.05)。结论:选择阴道超声引导下减灭双绒毛膜三胎妊娠中MCT的一个胚胎成为双绒毛膜双胎妊娠,尽管自然减胎率较高,但与双胚胎移植后双绒毛膜双胎妊娠相比,对其围产期结局无影响。
基金the National Natural Science Foundation of China (Project No.40372072)
文摘The Putaohua Oilfield is a fault-prolific area and the faults have close relation with structural traps. The genetic models of the structural traps in the Putaohua Oilfield can be divided into two types： individual fault model and multi-fault interaction model. This is based on the description of displacement distribution of typical individual normal faults, the geometry of the footwall and hanging wall, and the analysis of the interaction between faults and the corresponding change in geometry when the faults grow. The individual fault model is that the displacement reaches a maximum at or near the center of fault and decreases toward the fault tips, so a half-graben is formed on the hanging wall of the fault and a half- anticline is formed on the footwall because of the isostatic process. The multi-fault interaction model is that during the growth of faults, they overlap and interact with each other, and accommodation zones are formed in the overlapping segments. The accommodation zones are favorable targets for hydrocarbon exploration, and the trap characteristics are dependent The multi-fault interaction model can be subdivided on the extent of overlap and occurrence of faults. into three types： synthetic accommodation zone, convergent accommodation zone and divergent accommodation zone. Hydrocarbon migration and accumulation models of each type have been developed. The hydrocarbon migration and accumulation models of the traps with different genetic models have their own characteristics in the different stages of fault growth.
文摘The relationship between deposition and tectonics of sedimentary basins has been a significant subject in recent years.Using typical rift basins such as the Nanpu Sag as an example,combined with the analysis of the tectonics-palaeogeomorphology of basins,we undertook a detailed study of the differences of the third-order sequences in different basins,the combination of depositional systems within the sequence framework and the distribution of depocenters and subsidence centers.Our results revealed a significant relationship between the tectonics-palaeogeomorphology of rift basins and the filling styles of sedimentary sequences.The basin structure plays a primary role in controlling the development of the third-order sequences and the boundary of these sequences is easily formed in basins with gentle slopes,shallow water and a small area.The characteristics of the tectonics-palaeogeomorphology of rift basins are dominated by half-grabens of extensional faults,which affect the temporal and spatial combination of sedimentary systems within the sequences as well as the distribution of depocenters and subsidence centers.Based on the development rules of the faults dominating the half-grabens of extensional faults,rift basins are classified into two types： the single fault segmented-linkage type and the multi-fault combination type.The main controlling factors of the temporal and spatial combination of sedimentary systems and the distribution of depocenters and subsidence centers in different basins are different.The characteristics of early segmentation and later linkage of the faults play a critical role in controlling the sedimentary system combination within the sequence framework and the temporal and spatial differences of depocenters and subsidence centers of the single fault segmented-linkage rift basins,while the differences in fault activities are the dominating factors of the multi-fault combination rift basins.
