目的 研究孕妇孕妇体质量指数及其孕期增重对妊娠结局的影响.方法 选取2005～2008年在本院分娩符合标准的孕妇1 897例,根据不同的孕妇体质量指数分为3组,根据孕期体重增大的不同幅度分为3组,比较各组的剖宫产率、新生儿窒息率、巨大儿...目的 研究孕妇孕妇体质量指数及其孕期增重对妊娠结局的影响.方法 选取2005～2008年在本院分娩符合标准的孕妇1 897例,根据不同的孕妇体质量指数分为3组,根据孕期体重增大的不同幅度分为3组,比较各组的剖宫产率、新生儿窒息率、巨大儿发生率、产后出血率、早产率、低体重儿发生率.结果 超重组的剖宫产率（36.04% vs 28.03%）、巨大儿发生率（10.41% vs 6.83%）、新生儿窒息率（8.63% vs 2.89%）、早产（5.33% vs 2.09%）、低出生体重（4.82% vs 2.49%）均高于正常体重组（均P＆lt;0.05）,消瘦组早产、低出生体重发生率高于正常体重组（6.59% vs 2.09%,5.43% vs 2.49%,均P＆lt;0.05）.孕期体重增长过多或者增重不足组妊娠结局明显差于增重合适组（P＆lt;0.05）.增重过多组剖宫产、新生儿窒息、早产、低出生体重发生率约为增重合适组的2倍[OR分别为1.82（95%CI 1.47～2.26）,2.34（95%CI 1.43～3.84）,2.20（95%CI 1.25～3.86）1.92（95%CI 1.06～3.47）,均P＆lt;0.05].结论 孕妇体重指数、孕期体重增长的增幅对分娩结局有影响,孕前保持正常体重、孕期合理营养控制适宜的体重增长有利于取得理想的分娩结局.展开更多
The newly observed isomer and ground-state band in the odd-Z neutron-rich rare-earth nucleus 163 Eu are investigated by using the cranked shell model(CSM), with pairing treated by the particle-number conserving(PNC)me...The newly observed isomer and ground-state band in the odd-Z neutron-rich rare-earth nucleus 163 Eu are investigated by using the cranked shell model(CSM), with pairing treated by the particle-number conserving(PNC)method. This is the first time detailed theoretical investigations are performed of the observed 964(1) keV isomer and ground-state rotational band in 163 Eu. The experimental data are reproduced very well by the theoretical results. The configuration of the 964(1) keV isomer is assigned as the three-particle state 13^-/2(v7^+/2 [633]■v1^-/2[521]■π5^+/2[413]).More low-lying multi-particle states are predicted in 163 Eu. Due to its significant effect on the nuclear mean field, the high-order ε6 deformation plays an important role in the energy and configuration assignment of the multi-particle states. Compared to its neighboring even-even nuclei 162 Sm and 164 Gd,there is a 10%15% increase of J(1) of the oneparticle ground-state band in 163 Eu. This is explained by the pairing reduction due to the blocking of the nucleon on the proton π5+/2 [413] orbital in 163 Eu.展开更多
The Nilsson mean-field plus the extended pairing model for well-deformed nuclei is applied to some representative rare earth examples. The binding energies, some low-lying pair-excited states and evenodd mass differen...The Nilsson mean-field plus the extended pairing model for well-deformed nuclei is applied to some representative rare earth examples. The binding energies, some low-lying pair-excited states and evenodd mass differences of Er, Yb and Hf isotopes are calculated systematically within the proton frozen-pair excitation limit. A comparison with experimental data for these nuclei shows that the results of the extended pairing model are better than those for the standard pairing model with the BCS approximation and the nearest-orbit pairing model.展开更多
文摘目的 研究孕妇孕妇体质量指数及其孕期增重对妊娠结局的影响.方法 选取2005～2008年在本院分娩符合标准的孕妇1 897例,根据不同的孕妇体质量指数分为3组,根据孕期体重增大的不同幅度分为3组,比较各组的剖宫产率、新生儿窒息率、巨大儿发生率、产后出血率、早产率、低体重儿发生率.结果 超重组的剖宫产率（36.04% vs 28.03%）、巨大儿发生率（10.41% vs 6.83%）、新生儿窒息率（8.63% vs 2.89%）、早产（5.33% vs 2.09%）、低出生体重（4.82% vs 2.49%）均高于正常体重组（均P＆lt;0.05）,消瘦组早产、低出生体重发生率高于正常体重组（6.59% vs 2.09%,5.43% vs 2.49%,均P＆lt;0.05）.孕期体重增长过多或者增重不足组妊娠结局明显差于增重合适组（P＆lt;0.05）.增重过多组剖宫产、新生儿窒息、早产、低出生体重发生率约为增重合适组的2倍[OR分别为1.82（95%CI 1.47～2.26）,2.34（95%CI 1.43～3.84）,2.20（95%CI 1.25～3.86）1.92（95%CI 1.06～3.47）,均P＆lt;0.05].结论 孕妇体重指数、孕期体重增长的增幅对分娩结局有影响,孕前保持正常体重、孕期合理营养控制适宜的体重增长有利于取得理想的分娩结局.
基金Supported by National Natural Science Foundation of China(11775112)the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘The newly observed isomer and ground-state band in the odd-Z neutron-rich rare-earth nucleus 163 Eu are investigated by using the cranked shell model(CSM), with pairing treated by the particle-number conserving(PNC)method. This is the first time detailed theoretical investigations are performed of the observed 964(1) keV isomer and ground-state rotational band in 163 Eu. The experimental data are reproduced very well by the theoretical results. The configuration of the 964(1) keV isomer is assigned as the three-particle state 13^-/2(v7^+/2 [633]■v1^-/2[521]■π5^+/2[413]).More low-lying multi-particle states are predicted in 163 Eu. Due to its significant effect on the nuclear mean field, the high-order ε6 deformation plays an important role in the energy and configuration assignment of the multi-particle states. Compared to its neighboring even-even nuclei 162 Sm and 164 Gd,there is a 10%15% increase of J(1) of the oneparticle ground-state band in 163 Eu. This is explained by the pairing reduction due to the blocking of the nucleon on the proton π5+/2 [413] orbital in 163 Eu.
基金Supported by U.S.National Science Foundation (PHY-0500291 & OCI-0904874)Southeastern Universities Research Association,National Natural Science Foundation of China (10775064)+2 种基金Liaoning Education Department Fund (2007R28)Doctoral Program Foundation of State Education Ministry of China (20102136110002)LSU-LNNU Joint Research Program (9961)
文摘The Nilsson mean-field plus the extended pairing model for well-deformed nuclei is applied to some representative rare earth examples. The binding energies, some low-lying pair-excited states and evenodd mass differences of Er, Yb and Hf isotopes are calculated systematically within the proton frozen-pair excitation limit. A comparison with experimental data for these nuclei shows that the results of the extended pairing model are better than those for the standard pairing model with the BCS approximation and the nearest-orbit pairing model.
