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A Localization Method of High Energy Transients for All-sky Gamma-ray Monitor

Research in Astronomy and Astrophysics 2024年第10期24卷 25-35页

作者： Yi Zhao Wangchen Xue Shaolin Xiong Qi Luo Yuanhao Wang Jiacong Liu Heng Yu Xiaoyun Zhao Yue Huang Jinyuan Liao Jianchao Sun Xiaobo Li Qibin Yi Ce Cai Shuo Xiao Shenglun Xie Chao Zheng Yanqiu zhang Chenwei Wang Wenjun Tan Zhiwei Guo Chaoyang Li Zhenghua An Gang Chen Yanqi Du Min Gao Ke Gong Dongya Guo Jiang He Jianjian He Bing Li Gang Li Xinqiao Li Jing Liang Xiaohua Liang Yaqing Liu Xiang Ma Rui Qiao Liming Song Xinying Song Xilei Sun Jin Wang Ping Wang Xiangyang Wen Hong Wu Yanbing Xu Sheng Yang dali zhang Fan zhang Hongmei zhang Peng zhang Shu zhang Zhen zhang Shijie Zheng Keke zhang Xingbo Han Haiyan Wu Hu Tai Hao Geng Gaopeng Lu Wei Xu Fanchao Lyu Hongbo zhang Fangjun Lu Shuangnan zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China College of Physics Hebei Normal UniversityShijiazhuang 050024China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China Institute of Astrophysics Central China Normal UniversityWuhan 430079China College of physics Sciences Technology Hebei UniversityBaoding 071002China Physics and Space Science College China West Normal UniversityNanchong 637002China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China College of Electronic and information Engineering Tongji UniversityShanghai 201804China Innovation Academy for Microsatellites of Chinese Academy of Sciences Shanghai 201304China National Space Science Center Chinese Academy of SciencesBeijing 100190China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Electronic Information School Wuhan UniversityWuhan 430072China Key Laboratory of Transportation Meteorology of China Meteorological Administration Nanjing Joint Institute for Atmospheric SciencesNanjing 210000China Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Fast and reliable localization of high-energy transients is crucial for characterizing the burst properties and guiding the follow-up *** based on the relative counts of different detectors has been widely used for all-sky gamma-ray *** are two major methods for this count distribution localization:χ^(2)minimization method and the Bayesian *** we propose a modified Bayesian method that could take advantage of both the accuracy of the Bayesian method and the simplicity of the χ^(2)*** comprehensive simulations,we find that our Bayesian method with Poisson likelihood is generally more applicable for various bursts than the χ^(2)method,especially for weak *** further proposed a location-spectrum iteration approach based on the Bayesian inference,which could alleviate the problems caused by the spectral difference between the burst and location *** method is very suitable for scenarios with limited computation resources or timesensitive applications,such as in-flight localization software,and low-latency localization for rapidly follow-up observations.

关键词： methods:data analysis methods:analytical (stars:)gamma-ray burst:general

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基于众源地理空间数据的重庆市中心城区餐饮空间模式分析

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城市勘测 2024年第4期 11-14页

作者：张大利重庆市测绘科学技术研究院重庆401121 自然资源部智能城市时空信息与装备工程技术创新中心重庆401121

通过对重庆市中心城区内的餐饮店铺的空间位置和人均消费等相关信息进行收集,结合路网密度、POI活力指数,从个人体验、品牌效应、消费指数、便利程度、活力指数、大众点评、香农指标(餐饮店铺的丰富度和均匀度进行评价分析)等7个一级指... 详细信息

通过对重庆市中心城区内的餐饮店铺的空间位置和人均消费等相关信息进行收集,结合路网密度、POI活力指数,从个人体验、品牌效应、消费指数、便利程度、活力指数、大众点评、香农指标(餐饮店铺的丰富度和均匀度进行评价分析)等7个一级指标,14个二级指标,多维度构建了重庆市餐饮业综合评价指标体系,利用餐饮业综合评价指标体系对重庆市中心城区内餐饮业的空间形态进行聚类分析,深入研究分析了重庆市中心城区餐饮业的空间分布模式。

关键词：众源数据餐饮香农指标空间模式

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对一道经典物理竞赛复赛试题的再探讨

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物理教学 2024年第5期46卷 64-66,63页

作者：游晓明张大力戴亮江苏省姜堰中学江苏225300

文章从牛顿力学、机械能守恒和拉格朗日动力学三个角度,分析第33届全国中学生物理竞赛复赛第7题在不同视域下的多种解法,同时以此题为例,深入探讨泰勒定理和拉格朗日方程在物理竞赛中的应用,培养学生从多角度解决问题的科学思维能力。

关键词：机械能守恒角动量定理拉格朗日动力学

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Description of the shape coexistence in neutron-deficient ^(74,76)Kr with IBM2

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Science China(Physics,Mechanics & Astronomy) 2016年第8期59卷 43-49页

作者： dali zhang ChengFu Mu Department of Physics Huzhou University

The shape deformation and shape coexistence in ^(74,76) Kr isotopes are investigated within the framework of the proton-neutron interacting boson model(IBM2). By considering the relative energy of the d proton boson to be different from that of the neutron boson, the low-lying energy spectrum is in good agreement with experimental results both qualitatively and quantitatively. In particular, the low-lying 0_2^+ states associated with the shape-coexistence phenomenon are reproduced quite well. The calculated key sensitive quantities of B(E2) transition branch ratios are fairly consistent with the experimental data except for R_4. The predicated deformation parameter is very similar for the ground states in ^(74)Kr and ^(76)Kr, showing good agreement with the experimental result,and the calculated deformation parameter for the second 0^+ state in ^(74)Kr is close to the experimental data. The calculated results of the triaxiality parameter indicated an almost purely prolate shape for the ground state of ^(76)Kr and a mostly prolate shape with a little triaxiality for the ground state of ^(74)Kr. The calculations also show an oblate triaxial shape for the second 0^+ state in ^(76)Kr and maximum triaxiality for the second 0^+ state in ^(74)Kr. These results confirm the importance of the triaxial deformation for the description of such shape coexistence.

关键词： ^(74)Kr ^(76)Kr shape coexistence low-ling energy states IBM2

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Description of the properties of the low-lying energy states in ^(100)Mo with IBM2

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Science China(Physics,Mechanics & Astronomy) 2014年第3期57卷 447-452页

作者： zhang dali DING BinGang Department of Physics Huzhou Teacher's College

The properties of the low-lying energy states for the l00 Mo isotope is investigated within the framework of the proton-neutron interacting model IBM2. By considering the relative energy of the d proton boson to be different from that of the neutron boson and taking into account the dipole interacting among like-boson Lπ·Lπ and Lπ·Lπ, the low-lying energy spectrum is reproduced well. Particularly, the relative position of the energies for 2＋1, 0＋2, 2＋2 and 4＋1 states shifted correctly fit the experimental data. The electromagnetic properties, including the key observable B（E2） reduced transition branching ratios and the E2 reduced matrix elements of the experimental data, are well described. Our calculations show possible shape coexistence in the l00Mo nucleus.

关键词： 100Mo shape coexistence low-ling energy states IBM2.

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Nuclear structure of ^(76)Ge from proton-neutron interacting boson model calculations

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Science China(Physics,Mechanics & Astronomy) 2018年第1期61卷 44-50页

作者： dali zhang ChengFu Mu Department of Physics Huzhou University

The properties of low-lying states in 76Ge, especially the characteristics of the mixed-symmetry states, have been investigated within the neutron-proton interacting boson model （IBM-2）. By considering the relative energy of d proton boson to be different from that of neutron boson, the low-lying positive parity levels and M1, E2 transition strengths have been calculated. The IBM-2 calculated results are in good agreement with the experimental data. Particularly, the mixed-symmetry states have been reproduced quite well. The calculation and systematic analysis demonstrated that the collective character of 76Ge lies closest to the SUπv^＊（3）, with some possible Oπv（6） dynamic symmetry in IBM-2 viewpoint.

关键词： 76Ge energy levels E2 and M1 transition strengths IBM-2

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Description of spectrum and electromagnetic transitions in ^(94)Mo through the proton-neutron interacting boson model

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Science China(Physics,Mechanics & Astronomy) 2018年第1期61卷 37-43页

作者： ChengFu Mu dali zhang Department of Physics Huzhou University

We investigated the properties of low-lying states in ^(94)Mo within the framework of the proton-neutron interacting boson model(IBM-2), with special focus on the characteristics of mixed-symmetry states. We calculated level energies and M1 and E2 transition strengths. The IBM-2 results agree with the available quantitative and qualitative experimental data on ^(94)Mo. The properties of mixed-symmetry states can be well described by IBM-2 given that the energy of the d proton boson is different from that of the neutron boson, especially for the transition of B(M1, 4_2^+→ 4_1^+).

关键词： 94Mo mixed-symmetry states M1 and E2 transition strengths IBM-2

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Description of mixed symmetry states in 96Ru using IBM-2

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Science China(Physics,Mechanics & Astronomy) 2017年第4期60卷 32-39页

作者： dali zhang ChengFu MU Department of Physics Huzhou University Huzhou 313000 China

We have investigated the properties of low-tyiag states iu 96Ru within the framework of the neutron-proton interacting boson model （IBM-2）, with special attention paid to the characteristics of the mixed symmetry states. By considering the relative energy of d proton boson to be different from that of neutron boson, the level energies and M1, E2 transition strengths have been calculated. The IBM-2 calculation is consistent with the experimental data of 96Ru both quantitatively and qualitatively. Particularly, the strong M1 transition between the 42^＋ and 41^＋ states has been reproduced nicely. The calculated results show that the M1 transition strength of B（M1,42^＋ → 41^＋） in 96Ru carl be described successfully by the IBM-2.

关键词： 96Ru mixed-symmetry M1 transition strengths IBM-2

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NEW NONSTANDARD JOB SHOP SCHEDULING ALGORITHM

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Chinese Journal of Mechanical Engineering 2008年第4期21卷 97-100页

作者： XIE Zhiqiang YE Guangjie zhang dali TAN Guangyu School of Computer Science and Technology Harbin University of Science and Technology Harbin 150080 China Department of Mathematics and Statistics University of Calgary Calgary T2N 1N4 Canada School of Mechanical Power Engineering Harbin University of Science and Technology Harbin 150080 China

Considering the complex constraint between operations in nonstandard job shop scheduling problem （NJSSP）, critical path of job manufacturing tree is determined according to priority scheduling function constructed. Operations are divided into dependent operations and independent operations with the idea of subsection, and corresponding scheduling strategy is put forward according to operation characteristic in the segment and the complementarities of identical function machines. Forward greedy rule is adopted mainly for dependent operations to make operations arranged in the right position of machine selected, then each operation can be processed as early as possible, and the total processing time of job can be shortened as much as possible. For independent operations optimum scheduling rule is adopted mainly, the inserting position of operations will be determined according to the gap that the processing time of operations is subtracted from idle time of machine, and the operation will be inserted in the position with minimal gap. Experiments show, under the same conditions, the result that operations are scheduled according to the object function constructed, and the scheduling strategy adopted is better than the result that operations are scheduled according to efficiency scheduling algorithm.

关键词： Nonstandard job shop scheduling Priority scheduling function Subsection Forward greedy rule Optimum scheduling rule

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A study of particle number fluctuation under BCS theory

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Science China(Physics,Mechanics & Astronomy) 2007年第2期50卷 231-239页

作者： DING BinGang NING PingZhi zhang dali LU DingHui College of Science Huzhou Teacher’s CollegeHuzhou 313000China Department of Physics Nankai UniversityTianjin 300071China Department of Physics Zhejiang UniversityHangzhou 310027China

Particle number fluctuations in BCS theory are studied with the relativistic mean-field theory and the shell effects of particle number fluctuations are first discovered. By analyzing the relative errors of the particle number fluctuations, we find that the particle number fluctuations are relevant with the odd-even character. We later apply this method to the examination of the new shell structure, showing that N = 184 for the neutron is indeed a new closed shell.

关键词： relativistic mean-field model shell effects BCS theory particle number fluctuations odd-even effect

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