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The breaking of spin symmetry in the single-particle resonances in deformed nuclei

Nuclear Science and Techniques 2024年第3期35卷 237-245页

作者： Zhen-Yu Zheng shou-wan chen Quan Liu School of Physics and Optoelectronic Engineering Anhui UniversityHefei 230601China

The exploration of spin symmetry (SS) in nuclear physics has been instrumental in identifying atomic nucleus *** this study,we solve the Dirac equation from the relativistic mean field (RMF) in complex momentum *** investigated SS and its breaking in single-particle resonant states within deformed nuclei,with a focus on the illustrative *** was the initial discovery of a resonant spin doublet in a deformed nucleus,with the expectation of the SS approaching the continuum *** increasing single-particle energy,the splitting of the resonant spin doublets widened *** escalating splitting implies diminishing adherence to the SS,indicating a departure from the expected behavior as the energy levels *** also analyzed the width of the resonant states,showing that lower orbital angular momentum resonances possess shorter decay times and that SS is preserved within broad resonant doublets,as opposed to narrow resonant *** the radial density of the upper components for the bound-state and resonant-state doublets,it becomes evident that while SS is well-preserved in the bound states,it deteriorates in the resonant *** impact of nuclear deformation (β_(2)) on SS was examined,demonstrating that an increase in β_(2) resulted in higher energy and width splitting in the resonant spin doublets,which is attributed to increased component ***,the sensitivity of spin doublets to various potential parameters such as surface diffuseness (a),radius (R),and depth (Σ0) is discussed,emphasizing the role of these parameters in *** study provides valuable insights into the behavior of spin doublets in deformed nuclei and their interplay with the nuclear structure,thereby advancing our understanding of SS in the resonance state.

关键词： Spin symmetry Resonant states Deformed nuclei Complex-momentum representation

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Solution to the Dirac equation using the finite difference method

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Nuclear Science and Techniques 2020年第2期31卷 20-27页

作者： Ji-Yu Fang shou-wan chen Tai-Hua Heng School of Physics and Materials Science Anhui University

In this study,single-particle energy was examined using the finite difference method by taking 208Pb as an *** the first derivative term in the spherical Dirac equation is discretized using a three-point formula,a one-to-one correspondence occurs between the physical and spurious *** these energies are exactly the same,the wave functions of the spurious states exhibit a much faster staggering than those of the physical *** spurious states can be eliminated when applying the finite difference method by introducing an extra Wilson term into the ***,it was also found that the number of spurious states can be reduced if we improve the accuracy of the numerical differential *** Dirac equation is then solved in a momentum space in which there is no differential operator,and we found that the spurious states can be completely avoided in the momentum space,even without an extra Wilson term.

关键词： Finite difference method Spurious states Momentum space

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Role of Soybean GmbZIP132 under Abscisic Acid and Salt Stresses

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Journal of Integrative Plant Biology 2008年第2期50卷 221-230页

作者： Yong Liao Jin-Song Zhang shou-Yi chen wan-Ke Zhang National Key Laboratory of Plant Genomics Institute of Genetics and Developmental Biology the Chinese Academy of Sciences Beijing 100101 China

Plant basic-leucine zipper （bZlP） transcription factors play important roles in many biological processes. In the present study, a bZlP gene, GmbZIP132, was cloned from soybean and its biological function under abiotic stresses was studied. The transcription of GmbZIP132 was induced by drought and high salt treatments. Among all of the organs analyzed, its expression was the highest in cotyUedon and stems. GmbZIP132 could weakly bind to the GCN4-1ike motif （GLM）（5＇-GTGAGTCAT-3＇） in yeast one-hybrid assay. Compared with wild-type （WT） Arabidopsis plants, transgenic plants overexpressing GmbZlP132 showed reduced abscisic acid sensitivity and increased water loss rate. At the stage of germination, transgenic plants were more tolerant to salt treatment than wild-type plants. The expression of some abiotic stress-related genes, such as rd29B, DREB2A, and PSCS, were upregulated in the transgenic plants. These results indicated that GmbZlP132 was an abioUc stress-related gene, and its overexpression could increase the salt tolerance of transgenic Arabidopsis plants during germination, yet no significant difference of tolerance to abiotic stresses was found between transgenic and wild type plants at the seedling stage.

关键词： abiotic stresses basic-leucine zipper soybean.

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Influence of different fields of mesons on the pseudospin symmetry in single-neutron resonant states

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Chinese Physics C 2021年第12期45卷 106-113页

作者： Hua-Ming Dai Min Shi shou-wan chen Quan Liu School of physics and Optoelectronic Engineering Anhui UniversityHefei 230601China School of Mathematics and Physics Anhui Jianzhu UniversityHefei 230601China

In the framework of the relativistic mean field theory combined with the complex momentum representation method,we elucidate the pseudospin symmetry in the single-neutron resonant states and its dependence on the σ,ω,and ρ meson *** with the effect of theρfield,the τandωfields provide the main contributions to the pseudospin energy and width splitting of the resonant pseudospin ***,we compare quantitatively the pseudospin wave functions's plittings in resonant doublets,and investigate their dependencies on different fields of mesons,which is consistent with that of energy and width *** research is helpful to understand the mechanism and properties of pseudospin symmetry for resonant states.

关键词： pseudospin symmetry single-neutron resonant state splitting

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双料注射外角撑装饰板的浇口位置确定

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塑料工业 2011年第4期39卷 45-48页

作者：万守臣傅建余玲彭必友四川西华大学材料科学与工程学院四川成都610039

以双料注射成型某轿车外角撑装饰板为例,综合考虑不同浇口位置组合对制件翘曲变形和界面结合力的影响,在Moldflow软件平台上,分析确定浇口位置的最佳组合。在评价界面结合强度时,采用界面区基体局部熔化层最大深度和熔化持续时间作为判... 详细信息

以双料注射成型某轿车外角撑装饰板为例,综合考虑不同浇口位置组合对制件翘曲变形和界面结合力的影响,在Moldflow软件平台上,分析确定浇口位置的最佳组合。在评价界面结合强度时,采用界面区基体局部熔化层最大深度和熔化持续时间作为判断结合力的依据,这对于双料注射成型其它类似塑料件的界面结合强度判断具有一定借鉴意义。

关键词：外角撑装饰板双料注射浇口位置翘曲变形界面结合力

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线性调频连续波体制汽车防撞雷达目标特性研究

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天津职业技术师范大学学报 2017年第4期27卷 53-56页

作者：寿皖辰张军天津职业技术师范大学电子工程学院天津300222

根据调频连续波体制雷达的工作原理,以及道路上目标的运动类型,建立基本的道路目标信号数学模型。对实际回波可能存在的杂波和噪声进行分析,加上目标信号,合成最终的回波信号,并用MATLAB进行仿真,以期为汽车防撞雷达目标模拟器的研制提... 详细信息

根据调频连续波体制雷达的工作原理,以及道路上目标的运动类型,建立基本的道路目标信号数学模型。对实际回波可能存在的杂波和噪声进行分析,加上目标信号,合成最终的回波信号,并用MATLAB进行仿真,以期为汽车防撞雷达目标模拟器的研制提供参考。

关键词：调频连续波雷达汽车防撞雷达目标特性

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Mutual regulation of microglia and astrocytes after Gas6 inhibits spinal cord injury

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Neural Regeneration Research 2025年第2期20卷 557-573页

作者： Jiewen chen Xiaolin Zeng Le wang Wenwu Zhang Gang Li Xing cheng Peiqiang Su Yong wan Xiang Li Department of Spine Surgery The First Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Guangdong Province Key Laboratory of Orthopedics and Traumatology GuangzhouGuangdong ProvinceChina

Invasive inflammation and excessive scar formation are the main reasons for the difficulty in repairing nervous tissue after spinal cord *** and astrocytes play key roles in the spinal cord injury micro-environment and share a close ***,the mechanisms involved remain *** this study,we found that after spinal cord injury,resting microglia(M0)were polarized into pro-inflammatory phenotypes(MG1 and MG3),while resting astrocytes were polarized into reactive and scar-forming *** expression of growth arrest-specific 6(Gas6)and its receptor Axl were significantly down-regulated in microglia and astrocytes after spinal cord *** vitro experiments showed that Gas6 had negative effects on the polarization of reactive astrocytes and pro-inflammatory microglia,and even inhibited the cross-regulation between *** further demonstrated that Gas6 can inhibit the polarization of reactive astrocytes by suppressing the activation of the Yes-associated protein signaling ***,in turn,inhibited the polarization of pro-inflammatory microglia by suppressing the activation of the nuclear factor-κB/p65 and Janus kinase/signal transducer and activator of transcription signaling *** vivo experiments showed that Gas6 inhibited the polarization of pro-inflammatory microglia and reactive astrocytes in the injured spinal cord,thereby promoting tissue repair and motor function ***,Gas6 may play a role in the treatment of spinal cord *** can inhibit the inflammatory pathway of microglia and polarization of astrocytes,attenuate the interaction between microglia and astrocytes in the inflammatory microenvironment,and thereby alleviate local inflammation and reduce scar formation in the spinal cord.

关键词： astrocytes Axl cell polarization Gas6 Hippo signal inflammatory micro-environment intercellular interaction microglia single-cell sequencing spinal cord injury

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Impacts of Nutlin-3a and exercise on murine double minute 2-enriched glioma treatment

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Neural Regeneration Research 2025年第4期20卷 1135-1152页

作者： Yisheng chen Zhongcheng Fan Zhiwen Luo Xueran Kang Renwen wan Fangqi Li Weiwei Lin Zhihua Han Beijie Qi Jinrong Lin Yaying Sun Jiebin Huang Yuzhen Xu Shiyi chen Department of Sport Medicine Huashan HospitalFudan UniversityShanghaiChina Department of Orthopedic Surgery Hainan Province Clinical Medical CenterHaikou Affiliated Hospital of Central South University Xiangya School of MedicineHaikouHainan ProvinceChina Department of Basic Medicine Shanghai Jiao Tong University School of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Neurosurgery Second Affiliated Hospital of Zhejiang University School of MedicineZhejiang UniversityHangzhouZhejiang ProvinceChina Department of Orthopedics Shanghai General HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghaiChina Department of Infectious Diseases Children’s Hospital of Fudan UniversityNational Children’s Medical CenterShanghaiChina Department of Rehabilitation The Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina

Recent research has demonstrated the impact of physical activity on the prognosis of glioma patients,with evidence suggesting exercise may reduce mortality risks and aid neural *** role of the small ubiquitin-like modifier(SUMO)protein,especially post-exercise,in cancer progression,is gaining attention,as are the potential anti-cancer effects of *** used machine learning to create the exercise and SUMO-related gene signature(ESLRS).This signature shows how physical activity might help improve the outlook for low-grade glioma and other *** demonstrated the prognostic and immunotherapeutic significance of ESLRS markers,specifically highlighting how murine double minute 2(MDM2),a component of the ESLRS,can be targeted by *** underscores the intricate relationship between natural compounds such as nutlin-3 and immune *** comprehensive CRISPR screening,we validated the effects of specific ESLRS genes on low-grade glioma *** also revealed insights into the effectiveness of Nutlin-3a as a potent MDM2 inhibitor through molecular docking and dynamic ***-3a inhibited glioma cell proliferation and activated the p53 *** efficacy decreased with MDM2 overexpression,and this was reversed by Nutlin-3a or *** using a low-grade glioma mouse model highlighted the effect of physical activity on oxidative stress and molecular pathway ***,both physical exercise and Nutlin-3a administration improved physical function in mice bearing tumors derived from MDM2-overexpressing *** results suggest the potential for Nutlin-3a,an MDM2 inhibitor,with physical exercise as a therapeutic approach for glioma *** research also supports the use of natural products for therapy and sheds light on the interaction of exercise,natural products,and immune regulation in cancer treatment.

关键词： exercise and SUMO-related gene signatures(ESLRS) glioblastoma management low-grade glioma natural bioactives neural regeneration physical exercise

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Synthesis and Structural Characterization of Di(2-amino-5-methyl-1,8-naphthyridin-1-ium-7-carboxylato)dichlorocuprate(Ⅱ) Dihydrate

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Chinese Journal of Structural Chemistry 2007年第3期26卷 287-290页

作者： JIN shou-Wen LIU Bin chen wan-Zhi Department of Chemistry Zhejiang University Xixi Campus Hangzhou 310028 China

Di（2-amino-5-methyl-1,8-naphthyridin-1-ium-7-carboxylato）dichlorocuprate（Ⅱ） di- hydrate has been prepared from 5,7-dimethyl-1,8-naphthyridine-2-amine, CuCl2·2H2O and concentrated hydrochloride acid, and its structure was determined by X-ray diffraction at 298 K. The compound （C20H22Cl2CuN6O6, Mr = 576.88） crystallizes in monoclinic, space group P21/n with a = 9.102（9）, b = 12.150（12）, c = 10.619（10） A,β = 91.20°, V= 1174.1（19） A^3, Z= 2, Dc= 1.632 g/cm^3, F（000） = 590,μ = 1.208 mm^-1, R = 0.0392 and wR = 0.0984. The Cu^2＋ ion is six-coordinated by two nitrogen and two oxygen atoms from two different naphthyridine ligands at the equatorial positions together with two chloride ions located at the axial positions.

关键词： crystal structure copper chloride 5,7-dimethyi-1,8-naphthyridine-2-amine

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Multi-Sensor Estimation for Unreliable Wireless Networks with Contention-Based Protocols

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Journal of Computer Science & Technology 2018年第5期33卷 1072-1085页

作者： shou-wan Gao Peng-Peng chen Xu Yang Qiang Niu Key Laboratory of Gas and Fire Control for Coal Mines China University of Mining and Technology Xuzhou 221116 China School of Computer Science and Technology China University of Mining and Technology Xuzhou 221116 China

The state estimation plays an irreplaceable role in many real applications since it lays the foundation for decision-making and control. This paper studies the multi-sensor estimation problem for a contention-based unreliable wireless network. At each time step, no more than one sensor can communicate with the base station due to the potential contention and collision. In addition, data packets may be lost during transmission since wireless channels are unreliable. A novel packet arrival model is proposed which simultaneously takes into account the above two issues. Two scenarios of wireless sensor networks （WSNs） are considered： the sensors transmit the raw measurements directly and the sensors send the local estimation instead. Based on the obtained packet arrival model, necessary and sufficient stability conditions of the estimation at the base station side are provided for both network scenarios. In particular, all offered stability conditions are expressed by simple inequalities in terms of the packet arrival rates and the spectral radius of the system matrix. Their relationships with existing related results are also discussed. Finally, the proposed results are demonstrated by simulation examples and an environment monitoring prototype system.

关键词： wireless sensor network packet loss state estimation contention-based protocol

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