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Role of the Λ(1600) in the K^-p→Λπ^0π^0 reaction

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Communications in Theoretical Physics 2020年第4期72卷 64-70页

作者： He Zhou ju-jun xie Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBejing 101408China School of Physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China

Role of theΛ(1600)is studied in the K^-p→Λπ^0π^0 reaction by using the effective Lagrangian approach near the *** perform a calculation for the total and differential cross sections by considering the contributions from theΛ(1600)andΛ(1670)intermediate resonances decaying intoπ^0∑^*0(1385)with∑^*0(1385)decaying intoπ^0Λ.Additionally,the non-resonance process from u-channel nucleon pole is also taken into *** our model parameters,the current experimental data on the total cross sections of the K^-p→Λπ^0π^0 reaction can be well *** is shown that we really need the contribution from the A(1600)with spin-parity J^P=1/2^+,and that these measurements can be used to determine some of the properties of theΛ(1600)***,we also plot theπ0Λinvariant mass distributions which could be tested by the future experimental measurements.

关键词： KN scattering effective Lagrangian approach hyperon resonance

1.5T三维扰相梯度回波序列对膝关节软骨损伤的诊断价值分析

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中国CT和MRI杂志 2017年第2期15卷 122-124页

作者：居敏昊谢建强姜亦伦戴正行蔡冬梅江苏省无锡市锡山人民医院江苏无锡214000

目的探讨三维扰相梯度回波(3D GRE)序列在膝关节软骨损伤中的诊断价值,通过分析软骨的厚度、形态变化、信号强度等,为早期诊断关节软骨损伤提供依据。方法收集150例18~60岁膝关节损伤患者MRI成像资料,按年龄分为18~40岁、41~60岁两组。... 详细信息

目的探讨三维扰相梯度回波(3D GRE)序列在膝关节软骨损伤中的诊断价值,通过分析软骨的厚度、形态变化、信号强度等,为早期诊断关节软骨损伤提供依据。方法收集150例18~60岁膝关节损伤患者MRI成像资料,按年龄分为18~40岁、41~60岁两组。磁共振常规扫描T1WI、T2WI、T2WIFS及三维扰相梯度回波成像(3D GRE)序列,在MRI 3D GRE序列矢状位上测量膝关节内外侧关节面上下及髌软骨最厚处共5点关节软骨厚度,应用SPSS 19.0统计学软件对结果进行统计分析,以P<0.05为差异有统计学意义。结果在膝关节软骨病变检查中,三维扰相梯度回波(3D GRE)序列图像显示软骨的厚度、形态变化及信号强度最清晰,且图像的组织分辨率最高。结论三维扰相梯度回波(3D GRE)序列技术是目前MRI检查膝关节软骨损伤中最好的技术,软骨损伤越严重,则软骨厚度越薄,应用3D GRE序列可以减少漏诊、误诊。

关键词：膝关节软骨损伤三维扰相梯度回波序列

融合语义分割与模糊推理的无人机应急降落选址算法

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计算机工程与应用 2025年第1期61卷 174-185页

作者：李迪肖敏任东谢咏昶姚远三峡大学计算机与信息学院湖北宜昌443002 三峡大学湖北省农田环境监测工程技术研究中心湖北宜昌443002

随着无人机的应用领域从娱乐摄影拓展到物流、军事和灾害响应,对于无人机的自主智能化要求也越来越高。针对无人机紧急情况下自主降落区域复杂难以保证着陆安全的问题,提出了一种实时语义分割网络与模糊推理相结合的降落选址算法(STDC-L... 详细信息

随着无人机的应用领域从娱乐摄影拓展到物流、军事和灾害响应,对于无人机的自主智能化要求也越来越高。针对无人机紧急情况下自主降落区域复杂难以保证着陆安全的问题,提出了一种实时语义分割网络与模糊推理相结合的降落选址算法(STDC-LSSNet)。考虑到潜在危险因素在航拍图像上占比小、易被错误分割的问题,提出了小目标特征提取模块(small target feature capture module,STFCM),通过计算不同尺度特征的相似性并进行权重分配,强化小目标特征的表达。考虑到安全区域与危险区域边界混淆会导致无人机降落存在巨大风险,提出了边界特征融合模块(boundary feature fusion module,BFFM),将浅层网络由拉普拉斯卷积得到的边界信息与深层网络的语义信息进行特征融合,引入注意力机制,增强边界区域特征的表达。通过对分割得到的图像进行模糊推理,从而精确识别应急降落地点。所提算法在公开数据集Semantic Drone和AeroScapes上与最先进的算法进行了广泛的对比实验,mIoU提升1.72个百分点和3.89个百分点,实时分割速度达到210 FPS,选址的速度达到58.62 ms,实现了无人机在复杂情况下的应急降落选址。

关键词：无人机自主降落实时语义分割模糊推理注意力机制

Effects of combination of plant and microorganism on degradation of simazine in soil

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Journal of Environmental Sciences 2008年第2期20卷 195-198页

作者： LIAO min xie Xiaomei College of Environmental and Resources Sciences Zhejiang University Hangzhou 310029 China

The degradative characteristics of simazine （SIM）, microbial biomass carbon, plate counts of heterotrophic bacteria and most probably number （MPN） of SIM degraders in uninoculated non-rhizosphere soil, uninoculated rhizosphere soil, inoculated non- rhizosphere soil, and inoculated rhizosphere soil were measured. At the initial concentration of 20 mg SIM/kg soil, the half-lives of SIM in the four treated soils were measured to be 73.0, 52.9, 16.9, and 7.8 d, respectively, and corresponding kinetic data fitted first-order kinetics. The experimental results indicated that higher degradation rates of SIM were observed in rhizosphere soils, especially in inoculated rhizosphere soil. The degradative characteristics of SIM were closely related to microbial process. Vegetation could enhance the magnitude of rhizosphere microbial communities, microbial biomass content, and heterotrophic bacterial community, but did little to influence those community components responsible for SIM degradation. This suggested that rhizosphere soil inoculated with microorganisms-degrading target herbicides was a useful pathway to achieve rapid degradation of the herbicides in soil.

关键词： bioremediation degradation rhizosphere simazine (SIM)

Differential Fault Attack on GIFT

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Chinese Journal of Electronics 2021年第4期30卷 669-675页

作者： xie min TIAN Feng LI Jiaqi State Key Laboratory of Integrated Services Networks Xidian University Shaanxi Key Laboratory of Blockchain and Secure Computing

GIFT, a lightweight block cipher proposed at CHES2017, has been widely cryptanalyzed this *** paper studies the differential diffusion characteristics of round function of GIFT at first, and proposes a random nibble-based differential fault attack. The key recovery scheme is developed on the statistical properties we found for the differential distribution table of the S-box. A lot of experiments had been done and experimental results show that one round key can be retrieved with an average of20.24 and 44.96 fault injections for GIFT-64 and GIFT-128 respectively. Further analysis shows that a certain number of fault injections recover most key bits. So we demonstrate an improved fault attack combined with the method of exhaustive search, which shows that the master key can be recovered by performing 2;and 2;computations and injecting 31 and 32 faults on an average for GIFT-64 and GIFT-128 respectively.

关键词： GIFT Lightweight block cipher Differential fault attack Key recovery

Constrained voting extreme learning machine and its application

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Journal of Systems Engineering and Electronics 2021年第1期32卷 209-219页

作者： min Mengcan CHEN Xiaofang xie Yongfang School of Automation Central South UniversityChangsha 410083China

Extreme learning machine(ELM)has been proved to be an effective pattern classification and regression learning mechanism by ***,its good performance is based on a large number of hidden layer *** the increase of the nodes in the hidden layers,the computation cost is greatly *** this paper,we propose a novel algorithm,named constrained voting extreme learning machine(CV-ELM).Compared with the traditional ELM,the CV-ELM determines the input weight and bias based on the differences of between-class *** the same time,to improve the accuracy of the proposed method,the voting selection is *** proposed method is evaluated on public benchmark *** experimental results show that the proposed algorithm is superior to the original ELM ***,we apply the CV-ELM to the classification of superheat degree(SD)state in the aluminum electrolysis industry,and the recognition accuracy rate reaches87.4%,and the experimental results demonstrate that the proposed method is more robust than the existing state-of-the-art identification methods.

关键词： extreme learning machine(ELM) majority voting ensemble method sample based learning superheat degree(SD)

Control capability analysis for complex spacecraft thruster configurations

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Science China(Technological Sciences) 2010年第8期53卷 2089-2096页

作者： WANG min xie YongChun Beijing Institute of Control Engineering Beijing 100190China National Key Laboratory of Science and Technology on Space Intelligent Control Beijing 100190China

The set of forces and moments that can be generated by thrusters of a spacecraft is called the"control capability"with respect to the thruster *** the control capability of a thruster configuration is adequate to fulfill a given space mission,we say this configuration is a feasible one with respect to the *** study proposed a new way to analyze the control capability of the complex thruster *** mathematical definitions of feasibility were proposed,based on which a criterion to judge the feasibility of the thruster configuration was presented through calculating the shortest distance to the boundary of the controllable region as a function of the thruster ***,control capability analysis for the complex thruster configuration based on its feasibility with respect to the space mission was given followed by a 2-D thruster configuration example to demonstrate its validity.

关键词： thruster configuration control capability

Constraining the Earth-mass Primordial Black Hole Mergers Model of the Non-repeating FRBs Using the First CHIME/FRB Catalog

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Research in Astronomy and Astrophysics 2024年第9期24卷 76-82页

作者： min Meng Qiu-ju Huang Can-min Deng Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China

In this paper,we upgrade the constraints for the Earth-mass primordial black hole mergers model based on the first Canadian Hydrogen Intensity Mapping Experiment(CHIME)/fast radio burst(FRB)*** the null hypothesis that the observed non-repeating FRBs originate from Earth-mass primordial black hole mergers,we find that how the charges were distributed in the primordial black hole population is well described by a double powerlaw function with typical charge value of law function with typical charge value of q_(c)/10^(-5)=1.60_(-0.28)^(+0.28),where the power-law index α_(1)=2.33_(-0.18)^(+0.15) for q

关键词： black hole physics (stars:)gamma ray burst:general (cosmology:)dark matter

Study of the a1（1260） resonance in the γp→π+π+π-n reaction

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Chinese Physics C 2019年第6期43卷 45-50页

作者： Xu Zhang ju-jun xie Institute of Modem Physics Chinese Academy of Sciences Lanzhou 730000 China University of Chinese Academy of Sciences Beijing 101408 China

Within an effective Lagrangian approach and resonance model, we study the γp→a1（1260）+n andγp→π+π+π-n reactions via the π-exchange mechanism. For the γp →π+π+π-n reaction, we perform a calculation of the differential and total cross-sections by considering the contributions of the a1（1260） intermediate resonance decaying into per and then into π+π+π-. Besides,the non-resonance process is also considered. With a lower mass of a1（1260）, the experimental data for the invariant π+π+π-mass distributions can be fairly well reproduced. For theγp→a1（1260）+n reaction, with the model parameters, the total cross-section is of the order of 10 μb at the photon beam energy Eγ2.5 GeV. It is expected that the model calculations in this work could be tested by future experiments.

关键词： photoproduction mass distributions total cross-section a1(1260)