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The interplay of single-particle and collective motions in the low-lying states of ^(21)_(A)Ne with quadrupole-octupole correlations

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 120-129页

作者： HaoJie Xia xianye wu Hua Mei JiangMing Yao School of Mechanical and Electrical Engineering Handan UniversityHandan 056005China College of Physics and Communication Electronics Jiangxi Normal UniversityNanchang 330022China School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China Data Analysis and Research LLC Okemos 48864USA

The beyond mean-field approach for low-lying hypernuclear states is extended by mixing the configurations associated with both single-particle and quadrupole-octupole collective excitations within the generator coordinate method based on a covariant den-sity functional *** method is demonstrated in the application to the low-lying states of 21ΛNe,where the configurations with theΛhyperon occupying the first(Λ_(s))and second(Λ_(p))lowest-energy states are *** results indicate that the positive-parity states are dominated by theα+^(12)C+α+Λ_(s) *** contrast,the low-lying negative-parity states are domi-nated by a strong admixture ofα+16O+Λ_(s) structure andα+12C+α+Λ_(p) structure due to the inclusion of octupole *** a result,the low-lying negative-parity states become much lower than what is expected from the previous studies without the mixing,and the electric multipole transition strengths are significantly quenched.

关键词： spectroscopy of hypernucleus octupole deformation cluster structure covariant density functional theory

Influence of the Physical Environment on the Migration and Distribution of Nibea albiflora in the Yellow Sea

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Journal of Ocean University of China 2017年第1期16卷 87-92页

作者： ZHU xianye wu Kejian wu Lunyu Physical Oceanography Laboratory Ocean University of China First Institute of Oceanography State Oceanic Administration

This study investigates the migration and distribution of the warm-temperate fish Nibea albiflora. Their spawning migration and wintering migratory routes within in the Yellow Sea are described in detail. Considering the main physical features and environment of the Yellow Sea, it appears to be have one wintering ground and three migratory routes from the wintering ground to the spawning grounds. The fish begin to migrate from the wintering ground to the spawning grounds in the northwest region of the Yellow Sea in late March. The Yellow Sea has three spawning grounds. The first is located near the Yalu River on the Liaodong Peninsula and the second one is located in Rushan Bay of Shandong Peninsula. The third spawning ground is located in Haizhou Bay in the southern region of the Yellow Sea. This study found that the temperature of the Yellow Sea influences the migration of N. albiflora, and that the migratory routes coincide with the thermal fronts in the sea. Nutrients for juvenile fish are taken from the coastal upwelling area. Chlorophyll is a good environmental indicator of phytoplankton biomass and thereby provides the status of biological resources. Different types of sediment in near-shore zones are also of practical significance for the growth of fish. The study of the effects of marine environments on the migration of various fishes is not only significant to the fishing industry, but can also provide a scientific basis for the understanding of the ecological implications of the relevant physical processes.

关键词： Nibea albiflora migration temperature chlorophyll sediments

Study of relationship between wave transport and sea surface temperature anomaly(SSTA) in the tropical Pacific

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Acta Oceanologica Sinica 2016年第9期35卷 58-66页

作者： SHI Yongfang wu Kejian ZHU xianye YANG Fan ZHANG Yuming Key Laboratory of Marine Science and Numerical The First Institute of OceanographyState Oceanic Administration College of Oceanic and Atmospheric Sciences Ocean University of China National Marine Environmental Monitoring Center State Oceanic Administration

Large-scale water transport is one of the key factors that affect sea surface temperature anomaly（SSTA） in the eastern equatorial Pacific（EEP）.The relationship between the wave transport in the tropical Pacific and the SSTA in the EEP is examined by different methods,including band-pass filtering,period analysis,correlation analysis,significant analysis,and empirical orthogonal function（EOF） *** have found that the eastward shift of the wave transport anomaly in the tropical Pacific,with a period of 2 a and enhancing the transport of warm waters from the western Pacific warm pool,precedes the increase of sea surface temperature（SST） in the *** wave transport and the SSTA in the EEP have a maximum correlation of 0.65 with a time-lag of 6 months（transport variation precedes the temperature）.The major periods（3.7 a and 2.45 a） of the wave transport variability,as revealed by the EOF analysis,appear to be consistent with the SSTA oscillation cycle in the *** on the first occurrence of a significant SSTA in the Ni？o 3 region（5°S–5°N,90°–150°W）,two types of warm events are *** wave transport anomalies in two types present predominantly the west anomaly in the tropical Pacific,it is that the wave transport continues transport warm water from west to east before the onset of the warm *** impact of wave-induced water transport on the SSTA in the EEP is confirmed by the heat flux of the wave *** wave transport exerts significant effect on the SSTA variability in the EEP and thus is not neglectable in the further studies.

关键词： wave transport eastern equatorial Pacific sea surface temperature anomaly warm events

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一种纳亨级电感测试仪

应用科技 2013年第1期40卷 35-41页

作者：吴欲晓李正茂孙超贲晛烨山东大学信息科学与工程学院山东济南250100

在通信链路和高频前端电路中,尤其涉及匹配滤波网络时,纳亨级电感的应用十分广泛.但是小量值电感的制作和测量极为困难,同时分布参数对通信机的影响也是非常难以评估和改善的.设计了一种简洁、低成本、高效的高精度纳亨级电感测量仪,包... 详细信息

在通信链路和高频前端电路中,尤其涉及匹配滤波网络时,纳亨级电感的应用十分广泛.但是小量值电感的制作和测量极为困难,同时分布参数对通信机的影响也是非常难以评估和改善的.设计了一种简洁、低成本、高效的高精度纳亨级电感测量仪,包含ARM7主控制器、液晶显示模块、按键、DDS扫频模块、AGC模块、高频匹配检波器、电源、数字接口和其他信号调理电路.该仪器通过ARM7控制DDS产生扫频信号,寻找串联LC谐振回路的中心频率,从而计算补偿得到待测电感数值和其Q参数,并利用渐近式算法提高测量速度.该仪器能够测量1 nH^10μH的电感值,并且能够提供10 kHz^60 MHz的频率的正弦波信号输出.总的来说,该仪器结构模块化,易于调试,并且能够提供良好的人机交互界面和数字通信端口,方便自动测量.

关键词： LC串联谐振扫频纳亨级电感 ARM7 高频前端电路渐近式算法

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碳钢板激光切割工艺分析及优化

制造技术与机床 2024年第2期 38-45页

作者：钟毅栾显晔李晓宇薛海峰李天享武路鹏青岛科技大学机电工程学院山东青岛266061 山东新松工业软件研究院股份有限公司山东济南250013

随着科技的不断发展,激光切割技术已经成为现代工业生产中不可或缺的技术之一,碳钢激光切割件加工技术也得到越来越多的应用。随着对加工工件的质量要求越来越高,对激光加工工艺进行优化以获得更高切割质量与切割精度的钢板具有重要意... 详细信息

随着科技的不断发展,激光切割技术已经成为现代工业生产中不可或缺的技术之一,碳钢激光切割件加工技术也得到越来越多的应用。随着对加工工件的质量要求越来越高,对激光加工工艺进行优化以获得更高切割质量与切割精度的钢板具有重要意义。为了优化碳钢的激光加工工艺,文章以3 mm碳钢为对象,采用1500 W激光器系统,研究了激光功率、切割速度、离焦量和辅助气体压力等切割参数对切割质量的影响。选取切缝宽度、表面粗糙度、挂渣高度作为评价切割质量的标准,综合分析工艺参数对切割质量的影响规律并研究了影响机理,同时通过卷积神经网络对数据进行预测分析,并采用带精英策略的非支配排序的遗传算法对工艺参数进行优化,获得辅助气体为氧气条件下激光切割碳钢的最佳工艺参数为P=1500 W、v=64 mm/s、F=2.6 bar、h=2.9 mm。通过实验发现优化后的切件切割面光滑,无挂渣现象且切缝宽度较小,达到预期标准。

关键词：激光技术激光切割工艺参数卷积神经网络工艺优化

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发酵饲料的应用研究进展

现代畜牧兽医 2022年第2期 84-87页

作者：武志敏黄显晔刘雪松张鹏宇张艳罗天瑶王爽杜尔伯特蒙古族自治县畜牧技术服务中心黑龙江大庆166200 黑龙江省农业科学院畜牧兽医分院黑龙江齐齐哈尔161005

随着饲料端"禁抗"时代到来,寻找有效的替抗产品成为热点研究问题。采用益生菌发酵可提高饲料蛋白质和维生素的含量以及畜禽肠道菌群丰度,保证畜禽的健康;发酵中的代谢产物具有抗菌、抗病毒以及提高畜禽免疫力等功能。发酵饲料优点众多,... 详细信息

随着饲料端"禁抗"时代到来,寻找有效的替抗产品成为热点研究问题。采用益生菌发酵可提高饲料蛋白质和维生素的含量以及畜禽肠道菌群丰度,保证畜禽的健康;发酵中的代谢产物具有抗菌、抗病毒以及提高畜禽免疫力等功能。发酵饲料优点众多,可在提高饲料利用率等方面发挥重要作用。文章就发酵饲料的优势、发酵工艺以及在畜禽中的应用展开综述,以期为发酵饲料的后续研究与应用提供参考。

关键词：发酵饲料益生菌畜禽应用