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Single-Particle Properties of Isospin Asymmetric Nuclear Matter

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Chinese Physics Letters 2012年第1期29卷 60-63页

作者： LI Zeng-Hua ZUO Wei guo wen-jun Institute of Modern Physics Department of Nuclear Science and TechnologyFudan UniversityShanghai 200433 Key Laboratory of Applied Ion Beam Physics(Ministry of Education) Fudan UniversityShanghai 200433 Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 College of Science University of Shanghai for Science and TechnologyShanghai 200093

The single-particle potentials in isospin asymmetric nuclear matter is investigated in the framework of the Brueck-ner theory by adopting the realistic Bonn B two-body interaction in combination with a consistent microscopic three-body *** rearrangement contribution induced by the ground state correlations to single-nucleon potentials is calculated in terms of the hole-line expansion of the mass *** the modification of this rearrangement term the symmetry potential is discussed as a function of momentum for several isospin asymme.

关键词： force rearrangement symmetry

Relativistic Mean Field Study of the Z -- 117 Isotopic Chain

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Chinese Physics Letters 2010年第6期27卷 52-55页

作者： GAO Yuan ZHANG Hong-Fei ZHANG Lei CHEN Xi-Meng LI jun-Qing guo wen-jun School of Information Engineering Hangzhou Dianzi University Hangzhou 310018 School of Nuclear Science and Technology Lanzhou University Lanzhou 730000 Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 College of Science University of Shanghai for Science and Technology Shanghai 200093

The properties of the Z = 117 isotopic chain are studied within the framework of the axially deformed relativistic mean field theory （RMFT） in the blocked BCS approximation. The ground-state properties, such as hinging energies, deformations as well as the possible α decay energies and lifetimes are calculated with the parameter set of NL-Z2 and compared with results from the finite range droplet model. The analysis by RMFT shows that the isotopes in the range of mass number A =291 ~ 300 exhibit higher stability, which suggests that they may be promising nuclei to be hopefully synthesized in the lab among the nuclei Z = 117.

关键词： RELATIVITY (Physics) MEAN field theory APPROXIMATION theory BINDING energy DEFORMATIONS (Mechanics) RADIOISOTOPES ATOMIC mass

基于LC-MS技术探讨仙鹤草干预非小细胞肺癌A549细胞的代谢组学研究

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药学学报 2024年第3期59卷 704-712页

作者：同泽华郭文军邹瀚锐徐丽伟徐雅娟王卫芳长春中医药大学吉林长春130117 吉林省中医药科学院吉林长春130012 长春中医药大学附属医院吉林长春130021

本研究应用体外细胞实验分析仙鹤草(Agrimonia pilosa, AP)干预A549细胞后, A549细胞的细胞活力、细胞凋亡、细胞周期的变化,探讨仙鹤草在体外的抗肿瘤活性,同时利用液相色谱-质谱(liquid chromatographymass spectrometry, LC-MS)联用... 详细信息

本研究应用体外细胞实验分析仙鹤草(Agrimonia pilosa, AP)干预A549细胞后, A549细胞的细胞活力、细胞凋亡、细胞周期的变化,探讨仙鹤草在体外的抗肿瘤活性,同时利用液相色谱-质谱(liquid chromatographymass spectrometry, LC-MS)联用的代谢组学技术分析细胞内代谢物的变化及代谢通路,为研究仙鹤草治疗非小细胞肺癌A549细胞的作用机制提供理论基础和实验依据。实验结果显示随着仙鹤草药物浓度的增加, A549细胞的细胞核发生皱缩,出现明显的凋亡现象;细胞的存活率降低,在低、高剂量条件下抑制率分别达到21.5%、91.74%;乳酸脱氢酶(lactate dehydrogenase, LDH)含量上升(P <0.05)。代谢组学结果显示两组间代谢差异明显,推测出LysoPC(24:0/0:0)、LysoPC(17:0/0:0)和PC(O-40:5)等33个差异代谢物;通路富集发现,中药仙鹤草主要通过调节A549细胞的甘油磷脂代谢、嘌呤代谢等发挥抗肿瘤作用,其中对甘油磷脂代谢通路的影响最为显著。结合药效结果提示,仙鹤草有可能通过调节A549细胞内LysoPC(24:0/0:0)、LysoPC(17:0/0:0)和PC(O-40:5)代谢物,诱导细胞凋亡和抑制A549细胞的生长。

关键词：仙鹤草代谢组学 A549细胞细胞凋亡细胞周期

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爪型氢循环泵的密封性研究

内燃机与配件 2024年第14期 54-57页

作者：刘军崔波郭文军唐昆鹏喻思媛重庆凯瑞动力科技有限公司重庆401122 中国汽车工程研究院股份有限公司重庆401122

爪型泵是氢循环泵最常用的一种结构形式。作为氢循环的动力部件,为满足电堆对氢气纯度的要求,在对氢气进行循环回收过程中必须做到无油污染,且还要确保泵的工作效率满足使用需要。因此对于爪型泵的防油密封和泵壳与转子的间隙密封就成... 详细信息

爪型泵是氢循环泵最常用的一种结构形式。作为氢循环的动力部件,为满足电堆对氢气纯度的要求,在对氢气进行循环回收过程中必须做到无油污染,且还要确保泵的工作效率满足使用需要。因此对于爪型泵的防油密封和泵壳与转子的间隙密封就成为了爪型泵必须解决的两个密封难点。本文对防油密封问题、泵腔的间隙密封进行分析研究并提出解决方案。

关键词：爪型氢循环泵防油密封间隙密封

丝素蛋白-纳米银复合材料在抗菌领域的研究进展

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现代化工 2024年第4期44卷 45-49页

作者：郭文钧杨灵芸柳丁祎陈嘉乐刘雪萍李瑶巨晓洁四川大学化学工程学院四川成都610065

重点总结归纳了丝素蛋白-纳米银复合膜、水凝胶、纤维等多种应用形态在抗菌领域的最新研究进展,阐述了丝素蛋白与纳米银结合的抗菌优势、复合材料目前尚待解决的稳定性与安全性问题,展望了丝素蛋白-纳米银复合材料发展方向。

关键词：伤口愈合细菌感染丝素蛋白纳米银复合材料抗菌性能

Entrance Channel Dependence of the Isospin Effects of the Nuclear Stopping in Intermediate Energy Heavy-Ion Collisions

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Chinese Physics Letters 2001年第8期18卷 1040-1043页

作者： YANG Yan-Fang LIU Jian-Ye ZUO Wei guo wen-jun ZHAO Qiang Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000 Institute of Modern Physics Chinese Academy of SciencesP.O.Box 31Lanzhou 730000

The entrance channel dependence of the isospin effects of nuclear stopping in intermediate energy heavy-ion collisions has been studied by using an isospin-dependent quantum molecular dynamics with three different kinds of symmetry *** is shown that nuclear stopping is sensitive to the beam energy,the impact parameter and the mass of the colliding system,specially very sensitive to the isospin dependence of in-medium nucleon-nucleon cross section,but insensitive to symmetry potential and the ratio of neutron to proton of colliding *** this *** is proposed that nuclear stopping can be used as a new probe to extract the information on the isospin dependence of in-medium nucleon-nucleon cross section in intermediate energy heavy-ion collisions.

关键词： symmetry Collisions quantum

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车载直流电源的故障预测与健康评估系统开发

汽车科技 2024年第5期 13-23,46页

作者：余云加彭子健吴来杰文国军余叶威广电计量检测集团股份有限公司武汉430074 中国地质大学(武汉) 武汉430074

车载电源作为一种移动电站,是野外作业的主要电能来源。其工作环境恶劣且情况复杂,因此各类元器件可能会出现不同程度的故障,若在故障出现早期能及时予以准确预测并诊断,会极大提高车载电源的安全性和可靠性。由于车载电源系统复杂度高... 详细信息

车载电源作为一种移动电站,是野外作业的主要电能来源。其工作环境恶劣且情况复杂,因此各类元器件可能会出现不同程度的故障,若在故障出现早期能及时予以准确预测并诊断,会极大提高车载电源的安全性和可靠性。由于车载电源系统复杂度高难以准确建模,且实际监测数据存在冗余、含有噪声且样本不平衡,传统的故障诊断方法难以对系统进行准确预测与健康评估。鉴于此本文采用数据驱动预测法,通过将机器学习算法与健康评估算法相结合,开展车载直流电源的故障预测与健康评估方法研究。主要内容包括:首先,基于直流电源的组成结构和工作原理,构建健康状态评估体系。针对目前设备健康状态估计的研究中,通常只将采集到的直流电源的电压或电流作为单一故障特征参数,容易导致估计结果不准确。此外,目前的评价方法很少考虑数据噪声对评价结果的影响,容易导致评价结果异常。为了解决以上两个问题,本文首先将输出电压、纹波电压、输出电流、外壳温度等状态指标引入到评价指标中。在此基础上,采用层次分析结合熵权法的组合赋权法确定各评价指标权重。最后采用基于加权马氏距离的多参数健康评估方法对电源进行健康状态评估。其次,研究基于Bi-LSTM模型的直流电源故障预测,将历史输出电压、纹波电压、输出电流、外壳温度等状态指标进行Min-MaxScaler归一化,将处理后的数据作为网络输入,利用Bi-LSTM加LSTM网络模型进行故障预测,并通过对预测曲线和实验数据的对比分析,证实此预测方法的有效性。

关键词：直流电源健康状态评估故障预测

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Middle Devonian ostracods from Jiwozhai patch reef(Dushan,Guizhou Province,South China):Biostratigraphic and palaeoecological implication

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Journal of Palaeogeography 2024年第3期13卷 581-593页

作者： jun-jun Song Jia-Yuan Huang wen guo Kun Liang Yu-Cong Sun Zhi-Hong Wang wen-Kun Qie State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina Hubei Key Laboratory of Paleontology and Geological Environment Evolution Wuhan Center of China Geological SurveyWuhan 430205Hubei ProvinceChina University of Chinese Academy of Sciences NanjingNanjing 211135Jiangsu ProvinceChina

The Middle Devonian ostracods from the Jiwozhai patch reef in Dushan, Guizhou Province, South China were described for the first time in this study. Twenty-nine species belonging to 20 genera were identified and figured, including a new species named Wangshangkia jiwozhaiensis sp. nov. The ostracod fauna in the Jiwozhai patch reef represents a Givetian age. The ostracod assemblage belongs to the smooth-podocopid association, which is also ecologically equivalent to the Eifelian Mega-Assemblage Ⅲ. This association is indicative of shallow open-marine environments. The Jiwozhai patch reef fauna is primarily comprised of suspension feeders, including filter-feeding ostracods, corals, brachiopods and bryozoans. Ostracods from the Jiwozhai patch reef were compared to the ostracod faunas from Laurentia-Baltica at generic level, which reveals limited faunal exchanges between South China and Laurentia-Baltica during the Middle Devonian.

关键词： Ostracods Givetian Jiwozhai patch reef Dushan Palaeoecology

P-and SV-wave dispersion and attenuation in saturated microcracked porous rock with aligned penny-shaped fractures

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Petroleum Science 2024年第1期21卷 143-161页

作者： Sheng-Qing Li wen-Hao Wang Yuan-Da Su jun-Xin guo Xiao-Ming Tang School of Geosciences China University of Petroleum(East China)Qingdao 266580ShandongChina Laoshan National Laboratory Qingdao 266071ShangdongChina Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology Southern University of Science and TechnologyShenzhen 518055GuangdongChina Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055GuangdongChina

P-and SV-wave dispersion and attenuation have been extensively investigated in saturated poroelastic media with aligned ***,there are few existing models that incorporate the multiple wave attenuation mechanisms from the microscopic scale to the macroscopic ***,in this work,we developed a unified model to incorporate the wave attenuation mechanisms at different scales,which includes the microscopic squirt flow between the microcracks and pores,the mesoscopic wave-induced fluid flow between fractures and background(FB-WIFF),and the macroscopic Biot's global flow and elastic scattering(ES)from the *** Tang's modified Biot's theory and the mixed-boundary conditions,we derived the exact frequency-dependent solutions of the scattering problem for a single penny-shaped fracture with oblique incident P-and *** then developed theoretical models for a set of aligned fractures and randomly oriented fractures using the Foldy *** results indicated that microcrack squirt flow considerably influences the dispersion and attenuation of P-and SV-wave *** coupling effects of microcrack squirt flow with the FB-WIFF and ES of fractures cause much higher velocity dispersion and attenuation for P waves than for SV *** oriented fractures substantially reduce the attenuation caused by the FB-WIFF and ES,particularly for the ES attenuation of SV *** a comparison with existing models in the limiting cases and previous experimental measurements,we validated our model.

关键词： Aligned fractures P-and SV-wave Dispersion and attenuation Microcracked porous background FB-WIFF Elastic scattering Squirt flow