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Changes of the Nuclear Charge Distribution of Nd from Optical Isotope Shifts

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Chinese Physics Letters 2001年第7期18卷 903-905页

作者： MA Hong-Liang LI Mao-Sheng yang fu-jia Department of Physics Shanghai UniversityShanghai 200436 Institute of Applied Physics and Computational Mathematics Beijing 100088 Institute of Modern Physics Fudan UniversityShanghai 200433

The isotope shifts and hyperfine structures of seven optical transitions for all seven stable isotopes of Nd II were measured by using collinear fast-ion-beam laser *** nuclear parameterλwas obtained from the measured optical isotope shifts for all seven stable isotopes with improved ***λvalues were analysed by using the Fermi distribution for the nuclear charge *** values of δ,δand δwere determined.

关键词： spectroscopy. density. transitions

Gamma ray absorption of cylindrical fissile material with dual shields

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Nuclear Science and Techniques 2005年第5期16卷 266-272页

作者： WU Chen-Yan TIAN Dong-Feng CHENG Yi-Ying HUANG Yong-Yi LU fu-Quan yang fu-jia Institute of Mathematics Fudan University Shanghai 200433 Institute of Modern Physics Fudan University Shanghai 200433 Institute of Applied Physics and Computational Mathematics Beijing 100088 Department of Physics University of Rhode Island 02881-0817 USA

This work analyzed the gamma ray attenuation effect from the self-absorption and shield attenuation per-spectively. An exact mathematical equation was given for the geometric factor of the cylindrical fissile material with dual shields. In addition, several approximation approaches suitable for real situation were discussed, especially in the radial and axial directions of the cylinders, since the G-factors have simple forms. Then the space distribution patterns of the G-factor were analyzed based on numerical result and effective ways to solve the geometric informa-tion of the cylindrical fissile material, the radii and the heights, were deduced. This method was checked and verified by numerical calculation. Because of the efficiency of the method, it is ideal for application in real situations, such as nuclear safeguards, which demands speed of detection and accuracy of geometric analysis.

关键词： γ射线裂变反应核反应堆吸收能力

Molecular characteristics and structure–activity relationships of food-derived bioactive peptides

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Journal of Integrative Agriculture 2021年第9期20卷 2313-2332页

作者： yang fu-jia CHEN Xu HUANG Mu-chen yang Qian CAI Xi-xi CHEN Xuan DU Ming HUANG jian-lian WANG Shao-yun Key Laboratory of Refrigeration and Conditioning Aquatic Products Processing of Ministry of Agriculture and Rural Affairs Xiamen 361022P.R.China College of Biological Science and Technology Fuzhou UniversityFuzhou 350108P.R.China College of Chemical Engineering Fuzhou UniversityFuzhou 350108P.R.China School of Food Science and Technology Dalian Polytechnic UniversityDalian 116034P.R.China fujian Anjoy Foods Co. Ltd.Xiamen 361022P.R.China

Peptides are functional active fragments of proteins which can provide nutrients needed for human growth and development,and they also have unique physiological activity characteristics relative to *** peptides contain a great deal of development *** specifically,food-derived bioactive peptides have the advantages of a wide variety of sources,unique structures,high efficiency and safety,so they have broad development *** review provides an overview of the current advances regarding the preparation,functional characteristics,and structure–activity relationships of food-derived bioactive ***,the prospects for the future development and application of food-derived bioactive peptides are *** review may provide a better understanding of foodderived bioactive peptides,and some constructive inspirations for further research and applications in the food industry.

关键词： food-derived proteins bioactive peptides molecular characteristics structure–activity relationship

Experimental Study of Single-Electron Detachment Cross Sections of Cu^(-) in Collision with He

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Chinese Physics Letters 2001年第10期18卷 1344-1345页

作者： LI Guang-Wu ZHANG Xue-Mei WU Shi-min LU fu-quan PENG Xian-Jue yang fu-jia Applied Ion Beam Physics Laboratory Institute of Modern PhysicsFudan UniversityShanghai 200433 Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900 China Academy of Engineering Physics Mianyang 621900

The single-electron detachment cross sections of Cu^(-) in collision with He have been measured in the range of 10-30keV by a growth rate method. The typical value of the cross section is 7.63×10-16 cm^(2) at an ener... 详细信息

关键词： method. Electron collision

Isotope Shifts in Nd H by Collinear Fast-Ion-Beam Laser Spectroscopy

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Chinese Physics Letters 1999年第6期16卷 411-412页

作者： MA Hong-liang CHEN Miao-hua CHEN Zhi-jun SHI Wei LU fu-quan TANG jia-yong yang fu-jia Accelerator-Based Atomic and Nuclear Physics Laboratory Institute of Modern PhysicsFudan UniversityShanghai 200433

Atomic spectra of singly ionized neodymium have been measured by collinear fast-ion-beam laser *** resonant spectra in the lines of 568.9,570.8,572.7,and 574.1 nm in NdH were obtained and the optical shifts were *** obtained the optical shifts of all the five even isotopes(142-150)in Nd IL The accuracy of our results was improved by one order of magnitude compared with other published results.

关键词： spectroscopy. neodymium resonant

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林木种子裹衣质量指标的研究

林业机械与木工设备 2001年第2期29卷 13-15页

作者：杨家富南京林业大学机械电子工程学院江苏南京210037

在试验的基础上，提出了林木种子裹衣的质量指标，分析其影响因素，为实施林木种子裹衣技术奠定基础。

关键词：林木种子种子裹衣质量指标

Changes in Mean Square Nuclear Charge Radii of NdⅡfrom Optical Isotope Shifts by Collinear Fast-Ion-Beam Laser Spectroscopy

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Chinese Physics Letters 1998年第3期15卷 178-179页

作者： MA Hong-liang SHI Wei YAN Bing CHEN Miao-hua CHEN Zhi-jun FANG Du-fei LU fu-quan TANG jia-yong yang fu-jia Accelerator-Based Atomic and Nuclear Physics Laboratory Institute of Modern PhysicsFudan UniversityShanghai 200433 CCSAT(World Laboratory) P.O.Box 8730Beijing 100080

High-resolution collinear fast-ion-beam-laser spectroscopy has been applied to investigate the optical isotope shifts for transition 4f^(4)5d^(6)K_(11/2)-(24445)°_(11/2) of NdⅡ.From the measured optical isotope shifts,changes in mean-square nuclear charge radiiδ(r^(2))(fm^(2))among five even-even neodymium isotopes have been deduced:(142,144)0.282,(144,146)0.242,(146,148)0.274,(148,150)*** results are in good agreement with experimental data from electronic x-ray spectroscopy and combined optical and x-ray spectroscopy.

关键词： spectroscopy neodymium spectroscopy

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考虑侧倾的无人车NMPC轨迹跟踪控制

控制与决策 2022年第10期37卷 2535-2542页

作者：王康李琼琼王子洋杨家富南京林业大学机械电子工程学院南京210037

针对高速行驶工况下,无人车转弯时的侧倾易导致车辆模型非线性程度增加,引起轨迹跟踪精度下降和状态失稳的问题,设计一种考虑车辆侧倾因素,基于非线性模型预测控制(NMPC)的无人车轨迹跟踪控制器.根据拉格朗日分析力学和车辆运动学,考虑... 详细信息

针对高速行驶工况下,无人车转弯时的侧倾易导致车辆模型非线性程度增加,引起轨迹跟踪精度下降和状态失稳的问题,设计一种考虑车辆侧倾因素,基于非线性模型预测控制(NMPC)的无人车轨迹跟踪控制器.根据拉格朗日分析力学和车辆运动学,考虑车辆侧倾几何学和载荷转移效应,建立考虑侧倾因素的非线性车辆模型,包括车体动力学模型和修正的“Magic Formula”轮胎模型;基于此车辆模型,构建非线性模型预测控制器(NMPC)的预测模型,并设定控制器的线性、非线性约束,以保证车辆的运动状态处于稳定区域内.在Carsim和Simulink联合仿真平台上,验证车辆高速蛇形工况和双移线工况下的轨迹跟踪控制效果,仿真结果显示,所设计的控制器可有效改善高速弯道工况下的跟踪精度和车辆状态稳定性.

关键词：无人车车辆侧倾模型轨迹跟踪非线性模型预测控制运动控制车辆动力学

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量子百年话创新

自然杂志 2001年第2期23卷 63-66页

作者：杨福家中国科学院

从量子概念的诞生、发展到为物理学带来革命性巨变的量子论的建立的整个过程 ,是科学家们在物理世界前所未有的一片宽广的前沿茫然探索、寻求知识的过程 ,也是物理学理论不断创新的过程 .这一发生在 1 0 0年前的量子革命发人深省 .

关键词：量子量子力学经典力学物理学创新量子理论