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基于动力性模糊控制拖拉机遥控换挡设计研究

农机化研究 2025年第1期47卷 218-225,233页

作者：刘九庆王宇航项前东北林业大学机电工程学院哈尔滨150040

为实现拖拉机遥控换挡,基于动力性模糊控制换挡设计了电控液压换挡系统,并在AMEsim中搭建仿真模型。根据发动机的调速特性,以油门开度、当前的车速和挡位为输入参数建立动力性换挡模型,并根据驾驶员意图和拖拉机状态建立二级模糊控制器... 详细信息

为实现拖拉机遥控换挡,基于动力性模糊控制换挡设计了电控液压换挡系统,并在AMEsim中搭建仿真模型。根据发动机的调速特性,以油门开度、当前的车速和挡位为输入参数建立动力性换挡模型,并根据驾驶员意图和拖拉机状态建立二级模糊控制器对动力性换挡策略进行修正。同时,设置工况,在MatLab/Simulink中建立拖拉机传动系统模型,利用AMEsim-Simulink进行联合仿真,得到液压缸活塞杆位移曲线,对可行性进行了验证。对比传统换挡与动力性模糊控制换挡,以离合器冲击度、滑摩功等为控制目标进行仿真分析。结果表明:与传统换挡系统相比所设计的系统控制效果较优,满足拖拉机动力性适应性要求。

关键词：拖拉机模糊控制遥控换挡仿真分析

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基于干涉和实时前馈实现三个量子节点的纠缠

原子与分子物理学报 2025年第4期42卷 113-120页

作者：刘艳红陈伟李雁翔太原师范学院物理系晋中030619 太原师范学院计算机科学与技术学院晋中030619 山西北方机械制造有限责任公司太原030009

纠缠多个空间分离的远程量子节点是构建量子信息网络的基础,不仅如此,多量子节点间的纠缠亦可应用于分布式量子计算和量子精密测量等,实现更高纠缠度的多量子节点间纠缠势在必行.文中基于干涉和实时前馈,借助于腔增强通过采用受激拉曼... 详细信息

纠缠多个空间分离的远程量子节点是构建量子信息网络的基础,不仅如此,多量子节点间的纠缠亦可应用于分布式量子计算和量子精密测量等,实现更高纠缠度的多量子节点间纠缠势在必行.文中基于干涉和实时前馈,借助于腔增强通过采用受激拉曼散射机制实现三个远距离原子系综的纠缠.该方案中只需要三套腔增强原子系统,光学谐振腔增强了光和原子之间的相互作用,使得通过受激拉曼散射产生的斯托克斯光场和反斯托克斯光场的效率得到提高,实现了高纠缠度的光与原子纠缠.在此前提下,基于斯托克斯光场的干涉和实时前馈实现三个远程原子节点间的纠缠.这种方法可以扩展到更大规模,甚至更加复杂的量子信息网络中,从而在量子信息科学中具有潜在的应用.

关键词：原子系综纠缠干涉实时前馈受激拉曼散射

Oracle Inequality for Sparse Trace Regression Models with Exponentialβ-mixing Errors

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Acta Mathematica Sinica,English Series 2023年第10期39卷 2031-2053页

作者： Ling PENG xiang yong TAN Pei Wen XIAO Zeinab RIZK Xiao Hui liu School of Statistics and Data Science Jiangxi University of Finance and EconomicsNanchang 330013P.R.China Key Laboratory of Data Science in Finance and Economics Jiangxi University of Finance and EconomicsNanchang 330013P.R.China

In applications involving,e.g.,panel data,images,genomics microarrays,etc.,trace regression models are useful *** address the high-dimensional issue of these applications,it is common to assume some sparsity *** the case of the parameter matrix being simultaneously low rank and elements-wise sparse,we estimate the parameter matrix through the least-squares approach with the composite penalty combining the nuclear norm and the *** extend the existing analysis of the low-rank trace regression with *** to exponentialβ-mixing *** explicit convergence rate and the asymptotic properties of the proposed estimator are ***,as well as a real data application,are also carried out for illustration.

关键词： Trace regression model low-rank matrix oracle inequality exponentialβ-mixing errors

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Characterization of the globular oxide inclusion ratings in steel using laser-induced breakdown spectroscopy

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Frontiers of physics 2016年第6期11卷 273-279页

作者： yong Zhang Yun-Hai Jia Chun Yang Dong-Ling Li Jia liu yong-Yan Chen Ying liu Yi-xiang Duan Research Center of Analytical Instrumentation Key Laboratory of Bio-Resource and Eco-Environment Ministry of Education College of Life Science Sichuan University Chengdu 610064 China Central Iron and Steel Research Institute Beijing 100081 China NCS Testing Technology Co. Ltd. Beijing 100094 China General Research Institute of Nonferrous Metals Beijing 100088 China

Grade assessment of steel is generally performed via the metallographic method, which is time-consuming and is not able to provide the elemental distribution information. In this paper, we present a method to measure the globular oxide inclusion ratings in steel using laser-induced breakdown spectroscopy (LIBS). The measurement is performed in two basic steps: steel samples are polished using metallographic sand paper and the Al2O3 inclusion number and size distribution in a marked area are observed using scanning electron microscope/energy dispersive X-ray spectroscopy (SEM/EDS) for further LIBS scanning analysis. The threshold intensity that distinguishes soluble aluminum and insoluble aluminum inclusions is determined using LIBS combined with the SEM/EDS statistical data. Carbon steel (the sample number is S9256) and bearing steel (the sample number is GCr15) are analyzed in scanning mode, and the number of Al2O3 inclusions in different size ranges is obtained from the statistical information derived from the Al2O3 size calibration curve. According to heavy and thin series for globular oxide inclusions grade assessment, the method we propose is comparable to the traditional metallographic method in terms of accuracy; however, the process is simplified and the measurement speed is significantly improved.

关键词： laser-induced breakdown spectroscopy (LIBS) globular oxide inclusion steel grade assessment elemental distribution

A Novel Design of a Pre-separation Panel Structure to Protect Against the Impact of an Explosion in an Aircraft Plenum Chamber

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Acta Mechanica Solida Sinica 2024年第1期37卷 166-180页

作者： Zongxing liu xiang Yang Jun liu School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China COMAC Shanghai Aircraft Design and Research Institute Shanghai 201210China

To reduce the damage of the pressurizing panel structure of a fuselage caused by an explosion at the“least risk bomb location”in an aircraft structure,a new pre-separation panel structure was designed to resist blast ***,the dynamic strain response and morphology of impact damage of the new pre-separation panel were measured in an impact damage ***,the commercial software LS-DYNA was used to calculate the propagation of the blast shock wave,and the results were compared with empirical equations to verify the rationality of the numerical calculation ***,the fluid–structure coupling method was used to calculate the damage process of the pre-separation panel structure under the impact of an explosion wave and an impact *** calculated results were in good agreement with the test results,which showed the rationality of the calculation method and the *** residual strength of the damaged pre-separation panel was significantly higher than that of the original damaged *** results show that the new pre-separation panel structure is reasonable and has certain significance for guiding the design of plenum chambers with strong resistance to implosion for aircraft fuselages.

关键词： Pre-separation panel structure Explosive response Residual strength Aircraft plenum chamber Least risk bomb location

Theoretical Studies on Structure, Isomerization, and Stability of [Si, O, S]

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Chemical Research in Chinese Universities 2013年第2期29卷 351-354页

作者： liu Ying-tao WANG Xin liu xiang-yu LI Xiao-ping JI yong-qiang Department of Chemistry and Chemical Engineering Ningxia University Yinchuan 750021 P. R. China College of Chemistry and Chemical Engineering Qufu Normal University Qufu 273165 P. R. China

The structures, energetics, and isomerization of a possible interstellar [Si, O, S] system were explored at the CCSD（T）/aug-cc-pVQZ//CCSD（T）/aug-cc-pVTZ level. On the schemaitc potential energy surface（PES）, we found that silicon oxysulfide（OSiS） produced in laboratory is the global minimum. An analysis of the Wiberg bond index（WBI）, bond order and the bond length, shows that silicon oxysulfide contains SiO and SiS double bonds in ac- cordance with the results of SchnOckel. Besides silicon oxysulfide, another interesting cyclic minimum（c-SiOS） was found to have a very high kinetic stability stabilized by the least barrier of 120.9 kJ/mol. In light of the fact that no cyclic sulfide-containing species has been detected in space, c-SiOS could be a very promising candidate. The presented results might provide useful information on detected interstellar molecules O=Si=S and c-SiOS.

关键词： Theoretical study Structure Schemaitc potential energy surface Stability [Si, O, S]

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30CrNiMn钢铸坯断裂原因研究

武钢技术 2011年第5期49卷 19-21页

作者：陈玮付勇涛严翔刘武群尹云洋武汉钢铁(集团)公司研究院湖北武汉430080

对30CrNiMn特殊钢铸坯发生断裂的原因进行分析,结果表明,造成30CrNiMn钢铸坯断裂的主要原因是铸坯中形成了大量的强韧性较差的上贝氏体组织,由于贝氏体相变过程中易形成缺陷,这些缺陷在受到自身重力和吊运过程中外力的作用时,形成裂纹... 详细信息

对30CrNiMn特殊钢铸坯发生断裂的原因进行分析,结果表明,造成30CrNiMn钢铸坯断裂的主要原因是铸坯中形成了大量的强韧性较差的上贝氏体组织,由于贝氏体相变过程中易形成缺陷,这些缺陷在受到自身重力和吊运过程中外力的作用时,形成裂纹并扩展,使铸坯发生断裂。

关键词： 30CrNiMn钢连铸坯断裂上贝氏体

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圈层化网络社群对青少年的伦理挑战及其应对

教学与管理 2025年第1期 34-38页

作者：刘昊琛冯永刚山东师范大学教育学部济南250014

青少年在网络空间构筑了基于共同兴趣和偏好的“新社群”。网络社群内部的圈层化趋势加强了青少年之间的联系与共鸣,在一定程度上重塑了他们的社会认知和伦理判断。然而,这种圈层化也带来了新型场域对伦理空间的冲击、圈层区隔对伦理关... 详细信息

青少年在网络空间构筑了基于共同兴趣和偏好的“新社群”。网络社群内部的圈层化趋势加强了青少年之间的联系与共鸣,在一定程度上重塑了他们的社会认知和伦理判断。然而,这种圈层化也带来了新型场域对伦理空间的冲击、圈层区隔对伦理关系的界分、特定惯习对伦理实践的影响和微观规训对伦理意识的裹挟等问题,将他们置于伦理挑战的情境中进行考量。鉴于此,创构主流舆论传播新格局、释放网络圈层整合共振力、激活多元话语互促生命力、注重外部治理和内部自律的统一性,对于网络社会治理和构建网络空间命运共同体具有重要意义。

关键词：圈层化网络社群青少年伦理挑战

Super-resolution microscopy based on parallel detection

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Journal of Innovative Optical Health Sciences 2019年第6期12卷 210-216页

作者： Zhimin Zhang Shaocong liu Liang Xu Yubing Han Cuifang Kuang yong liu xiang Hao Hongqin Yang Xu liu State Key Laboratory of Modern Optical Instrumentation College of Optical Science and Engineering Zhejiang University HangzhouZhejiang 310027P.R.China Ningbo Research Institute Zhejiang University Ningbo 315100P.R.China Collaborative Innovation Center of Extreme Optics Shanxi University TaiyuanShanxi 030006P.R.China College of Electronics and Information Engineering Shanghai University of Electric Power Shanghai 200090P.R.China Key Laboratory of Optoelectronic Science and Technology for Medicine Ministry of Education and Fujian Provincial Key Laboratory for Photonics Technology Fujian Normal University Fuzhou 350007P.R.China

Image scanning microscopy based on pixel reassignment can improve the confocal resolution limit without losing the image signal-to-noise ratio(SNR)greatly[***,"Super resolution in confocal imaging,"Optik 80(2)53-54(1988).***,***,"Image scanning microscopy,"***.104(19)198101(2010).***,***,R Heintzmann,"Superresolution by image scanning microscopy using pixel reassignment,"***.38(15)28892892(2013)].Here,we use a tailor-made optical fiber and 19 avalanche pho-todiodes(APDs)as parallel detectors to upgrade our existing confocal microscopy,termed as parallel-detection super resolution(PDSR)*** order to obtain the correct shift value,we use the normalized 2D cross correlation to calculate the shifting value of each *** characterized our system performance by imaging fuorescence beads and applied this system to observing the 3D structure of biological specimen.

关键词： Pixel reassignment SIM parallel-detection super-resolution(PDSR)microscopy normalized Cros correlation algorithm