目的:分析成人冠状动脉异常主动脉起源(anomalous aortic origin of coronary artery,AAOCA)的病例特点,总结经胸超声心动图(transthoracic echocardiography,TTE)漏诊原因,为提高TTE诊断成人AAOCA的准确性提供参考。方法:选择2019年1月...目的:分析成人冠状动脉异常主动脉起源(anomalous aortic origin of coronary artery,AAOCA)的病例特点,总结经胸超声心动图(transthoracic echocardiography,TTE)漏诊原因,为提高TTE诊断成人AAOCA的准确性提供参考。方法:选择2019年1月至2022年12月在某院经冠状动脉CT血管造影和/或有创冠状动脉造影确诊AAOCA的患者37例,统计患者临床症状、12导联心电图、心肌酶检查及TTE检查结果;将患者按照冠状动脉异常起源部位进行分型,分析TTE漏诊原因。采用卡方检验比较TTE漏诊差异情况。结果:37例患者中,无症状或轻症者共31例;12导联心电图检查、心肌酶检查、心腔大小变化、节段性室壁运动异常及左室收缩功能结果均以阴性者居多。以右冠状动脉起源于左冠状动脉窦(anomalous origin of the right coronary artery from left sinus,ARCA-L)患者最多,占比为59.45%(22/37);TTE 2次检查共确诊21例患者,均为冠状动脉异常起源于对侧冠状动脉窦(anomalous origin of coronary artery arising from the opposite sinus,ACAOS),其中ARCA-L 19例,TTE对ACAOS的检出率达87.5%;TTE检查13例起源于分支、高位开口的患者全部漏诊。TTE对ACAOS的检出率要显著高于冠状动脉异常起源于分支和起源于高位开口的检出率,差异有统计学意义(21/24 vs 0/13,P<0.001)。结论:成人AAOCA患者症状表现及相关检查结果以阴性居多、缺乏特异性;TTE对ACAOS的诊断检出率较高,但对冠状动脉异常起源于分支、高位开口的患者易漏诊。超声医师需进行多切面多角度联合扫查,正确应用彩色多普勒血流显像甄别假阴性,以降低漏诊率。展开更多
It is urgent to effectively improve the production efficiency in the running process of manufacturing systems through a new generation of information technology.According to the current growing trend of the internet o...It is urgent to effectively improve the production efficiency in the running process of manufacturing systems through a new generation of information technology.According to the current growing trend of the internet of things(IOT)in the manufacturing industry,aiming at the capacitor manufacturing plant,a multi-level architecture oriented to IOT-based manufacturing environment is established for a flexible flow-shop scheduling system.Next,according to multi-source manufacturing information driven in the manufacturing execution process,a scheduling optimization model based on the lot-streaming strategy is proposed under the framework.An improved distribution estimation algorithm is developed to obtain the optimal solution of the problem by balancing local search and global search.Finally,experiments are carried out and the results verify the feasibility and effectiveness of the proposed approach.展开更多
A new scheme was recently proposed in which the usual SU（3） quadrupole-quadrupole interaction was replaced by an O（6） cubic interaction in the Interacting Boson Model, and also successfully applied to the descript...A new scheme was recently proposed in which the usual SU（3） quadrupole-quadrupole interaction was replaced by an O（6） cubic interaction in the Interacting Boson Model, and also successfully applied to the description of 152Sm for the N=90 rare earth isotones with X（5） symmetry. By using this new scheme, in the present work, we further explore the properties of another candidate of 150Nd for the N=90 with X（5） symmetry. The low-lying energy levels and E2 transition rates are calculated and compared with the experimental data. The results show that the new scheme can also reasonably describe the experimental low-lying spectrum and the intraband and the interband E2 transitions for 150Nd. However, for the low-lying spectrum, the O（6） cubic interaction seems better in describing the energy levels, especially in higher excited states and γ band, yet the 02＋ level within the β band is lower than the corresponding experimental value and the U（5）-SU（3） scheme seems better to describe the low-lying levels of β band; and for the B（E2） transition, for the intraband transitions within the ground band and some interband transitions between the β band and the ground band, the results from O（6） cubic interaction are better than those from SU（3） quadrupole-quadrupole interaction, yet of which seems better to describe the intraband E2 transitions within β band. The present work is very meaningful in helping us to understand in depth the new characteristics of symmetry by the higher order O（6） cubic interaction.展开更多
文摘目的:分析成人冠状动脉异常主动脉起源(anomalous aortic origin of coronary artery,AAOCA)的病例特点,总结经胸超声心动图(transthoracic echocardiography,TTE)漏诊原因,为提高TTE诊断成人AAOCA的准确性提供参考。方法:选择2019年1月至2022年12月在某院经冠状动脉CT血管造影和/或有创冠状动脉造影确诊AAOCA的患者37例,统计患者临床症状、12导联心电图、心肌酶检查及TTE检查结果;将患者按照冠状动脉异常起源部位进行分型,分析TTE漏诊原因。采用卡方检验比较TTE漏诊差异情况。结果:37例患者中,无症状或轻症者共31例;12导联心电图检查、心肌酶检查、心腔大小变化、节段性室壁运动异常及左室收缩功能结果均以阴性者居多。以右冠状动脉起源于左冠状动脉窦(anomalous origin of the right coronary artery from left sinus,ARCA-L)患者最多,占比为59.45%(22/37);TTE 2次检查共确诊21例患者,均为冠状动脉异常起源于对侧冠状动脉窦(anomalous origin of coronary artery arising from the opposite sinus,ACAOS),其中ARCA-L 19例,TTE对ACAOS的检出率达87.5%;TTE检查13例起源于分支、高位开口的患者全部漏诊。TTE对ACAOS的检出率要显著高于冠状动脉异常起源于分支和起源于高位开口的检出率,差异有统计学意义(21/24 vs 0/13,P<0.001)。结论:成人AAOCA患者症状表现及相关检查结果以阴性居多、缺乏特异性;TTE对ACAOS的诊断检出率较高,但对冠状动脉异常起源于分支、高位开口的患者易漏诊。超声医师需进行多切面多角度联合扫查,正确应用彩色多普勒血流显像甄别假阴性,以降低漏诊率。
基金supported by the National Natural Science Foundations of China(No. 51875171)
文摘It is urgent to effectively improve the production efficiency in the running process of manufacturing systems through a new generation of information technology.According to the current growing trend of the internet of things(IOT)in the manufacturing industry,aiming at the capacitor manufacturing plant,a multi-level architecture oriented to IOT-based manufacturing environment is established for a flexible flow-shop scheduling system.Next,according to multi-source manufacturing information driven in the manufacturing execution process,a scheduling optimization model based on the lot-streaming strategy is proposed under the framework.An improved distribution estimation algorithm is developed to obtain the optimal solution of the problem by balancing local search and global search.Finally,experiments are carried out and the results verify the feasibility and effectiveness of the proposed approach.
基金Supported by Natural Science Foundation of Liaoning Scientific Committee(2013020091)National Natural Science Foundationof China(11375080,10975068)
文摘A new scheme was recently proposed in which the usual SU（3） quadrupole-quadrupole interaction was replaced by an O（6） cubic interaction in the Interacting Boson Model, and also successfully applied to the description of 152Sm for the N=90 rare earth isotones with X（5） symmetry. By using this new scheme, in the present work, we further explore the properties of another candidate of 150Nd for the N=90 with X（5） symmetry. The low-lying energy levels and E2 transition rates are calculated and compared with the experimental data. The results show that the new scheme can also reasonably describe the experimental low-lying spectrum and the intraband and the interband E2 transitions for 150Nd. However, for the low-lying spectrum, the O（6） cubic interaction seems better in describing the energy levels, especially in higher excited states and γ band, yet the 02＋ level within the β band is lower than the corresponding experimental value and the U（5）-SU（3） scheme seems better to describe the low-lying levels of β band; and for the B（E2） transition, for the intraband transitions within the ground band and some interband transitions between the β band and the ground band, the results from O（6） cubic interaction are better than those from SU（3） quadrupole-quadrupole interaction, yet of which seems better to describe the intraband E2 transitions within β band. The present work is very meaningful in helping us to understand in depth the new characteristics of symmetry by the higher order O（6） cubic interaction.
