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Particuology 2024年第6期89卷 67-78页

作者： yongzhi mei Yang Wang Lihui Zhang Feng Duan School of Energy and Environment Anhui University of TechnologyMaanshan243002China Wuhu Technology and Innovation Research Institute Wuhu241000China Wuhu Cigarette Factory of China Tobacco Anhui Industrial Co. Ldt.Wuhu241002China

On a cold spouted fluidized bed,this study compares the characteristic differences in intrinsic mode function(IMF)energy and Hilbert–Huang spectrum between the spout zone and annulus zone under different combinations of spouted gas and fluidized gas flow rates for five typical flow *** energy distribution characteristics under different flow patterns are also *** Hilbert–Huang spectrum and IMF energy of pressure difference signals exhibit distinct variations in different zones as the flow pattern ***,there exists a correlation between the energy in the middle-frequency range and the flow *** the K-means algorithm,the middle-frequency range energy of IMFs in the spout zone and annulus zone is subjected to clustering analysis,leading to the identification of partition boundaries for each flow *** on this,a flow pattern identification method of spouted fluidized bed coupled with middle-frequency range energy in spout zone and annulus zone is proposed,which has very high identification accuracy.

关键词： Spouted fluidized bed Flow pattern Zoning signal Flow pattern transition Hilbert-Huang transform

Impact of aperture on dynamic response of sandwich plates with aluminium face-sheets and PMI core based on an alternative finite element formulation and experiments

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Chinese Journal of Aeronautics 2022年第4期35卷 266-280页

作者： Zhen WU yongzhi LI Dongjian ZHANG Jie mei Xiaohui REN Rui MA School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China School of Mechanical Engineering Xi an Aeronautical UniversityXi'an 710065China

Apertures generally exist in the sandwich structures attributing to mechanical connection and lightweight, which might induce failure of such structures. Thus, it is required to realize the impact of aperture on mechanical behaviors of sandwich structures. If transverse shear deformations are unable to be described accurately, the reasonable prediction of dynamic behaviors of the form-core sandwich plates with apertures will meet severe challenges due to a large difference of transverse shear modulus at the adjacent layers. Thereby, such issue is less studied by using the efficient models and experimental testing, so an alternative sinusoidal-type finite element formulation is to be proposed to precisely predict dynamic response of the form-core sandwich structures with apertures. The proposed finite element formulation can meet beforehand compatible conditions of transverse shear stresses at the interfaces of adjacent laminates. In order to appraise strictly capability of the proposed model, experimental tests on natural frequencies of three groups of specimens with different apertures have been carried out. Moreover, four specimens in each group are tested to reduce the testing errors, which is less reported in the published literature. In addition,three-dimensional Finite Element Method(3-D FEM) is also selected to account for the good performance of the present model. Finally, the impact of aperture diameter on the natural frequencies of the sandwich structures is both experimentally and numerically investigated, which can serve as a reference for other researchers.

关键词： Dynamic response Sandwich plates Higher-order theory Experimental tests Finite element method

An advanced five-unknown higher-order theory for free vibration of composite and sandwich plates

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Chinese Journal of Aeronautics 2021年第9期34卷 104-118页

作者： Zhen WU Rui MA yongzhi LI Yushan XIAO Jie mei School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China

Accurate prediction of dynamic characteristics is quite critical to understand the strength of layered ***,the existing five-unknown higher-order theories encounter difficulties to forecast accurately the dynamic response of sandwich ***,a new five-unknown higher-order theory is developed for free vibration analysis of composite and sandwich plates,which possesses the same degree of freedom as those of other five-unknown higherorder *** developed model can meet beforehand interlaminar continuity conditions and the free-surface conditions of transverse shear *** assess capability of the proposed model,analytical solution for such composite structures with simply-supported conditions has been presented by employing Hamilton’s principle,which is utilized for analysis of mechanical behaviors of composite and sandwich *** with the three-dimensional(3 D)elasticity solutions,3 D finite element results and the results obtained from the chosen five-unknown higher-order models,the proposed model can yield accurately natural frequencies of composite and sandwich *** for the thick plates,the higher-order frequencies calculated from the proposed model are in good agreement with the 3 D finite element *** studying effect of the thickness/length ratios on natural frequencies,it is found that the proposed model is adaptable to predicting natural frequencies of the sandwich plates with the thickness/length ratios between 1/4 and 1/*** addition,some factors influencing accuracy of five-unknown higher-order models have been investigated in ***,by means of numerical analysis and discussion,some conclusions have been drawn as well,which can serve as a reference for other investigators.

关键词： Analytical solution Five-unknown Free vibrations Higher-order theory Sandwich plates

互联网人工智能技术应用的意识形态安全风险分析

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燕山大学学报（哲学社会科学版） 2022年第2期23卷 64-69页

作者：王媚刘永志中国社会科学院大学马克思主义学院北京102488 燕山大学马克思主义学院河北秦皇岛066004

互联网人工智能技术应用引发网络舆论空间中的群体极化危机、理论公关危机和话语权混乱危机,助长了互联网自身的“去中心化”意识形态倾向,一定程度上耗散了网络空间主流意识形态凝聚力和引领力。通过加强对互联网生态的观察、分析、研... 详细信息

互联网人工智能技术应用引发网络舆论空间中的群体极化危机、理论公关危机和话语权混乱危机,助长了互联网自身的“去中心化”意识形态倾向,一定程度上耗散了网络空间主流意识形态凝聚力和引领力。通过加强对互联网生态的观察、分析、研究、监督,及时遏制互联网人工智能技术应用带来的“去中心化”加重趋势,是巩固新时代我国网络意识形态安全的迫切性举措。

关键词：互联网人工智能技术意识形态安全风险

p38 MAPK controls the IRE1-XBP1 branch of the unfolded protein response following chronic ER stress in ***

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p38 MAPK controls the IRE1-XBP1 branch of the unfolded prote...

基于热力学相平衡模型的多组分燃料低温特性研究

第五届中国秀丽线虫大会

作者： Zhigao Zhan Liying Guan yongzhi Yang Xun Huang mei Ding State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of Sciences

ER stress occurs in many physiological and pathological conditions,but studying the chronic ER stress response in vivo is rather ***,we designed a genetic system in the nematode ***,which allows us to induce ER stress in specific cells,without drug treatment or any other external stimuli,and then to monitor the stress *** our system,

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西北大学学报（自然科学版） 2022年第1期52卷 99-105页

作者：高亚平梅德清陆海峰贺咏志张宇辰左磊江苏大学汽车与交通工程学院江苏镇江212013 江苏江淮动力股份有限公司江苏盐城224007

该文采用差示扫描量热仪对比研究了棕榈油生物柴油(palm methyl ester,PME)-柴油二元燃料和PME-乙醇-柴油三元燃料的结晶和熔融特性,并基于热力学相平衡理论构建模型计算多元燃料的析晶点。结果表明,在正十二烷(C12)中加入PME和乙醇可... 详细信息

该文采用差示扫描量热仪对比研究了棕榈油生物柴油(palm methyl ester,PME)-柴油二元燃料和PME-乙醇-柴油三元燃料的结晶和熔融特性,并基于热力学相平衡理论构建模型计算多元燃料的析晶点。结果表明,在正十二烷(C12)中加入PME和乙醇可以显著提高析晶点,其中三元燃料的析晶点明显低于二元燃料。这是因为PME内含较多的高饱和度脂肪酸甲酯,其长链结构促使燃料更易结晶。而乙醇的加入使得燃油分子间作用力增大,阻碍了分子间运动趋势,并加剧非均匀成核,致使三元燃料的结晶难度高于二元燃料。此外,不同比例下混合燃料的析晶点计算值与试验值具有较好的一致性,证明该热力学模型可用于预测多组分燃料的低温特性。

关键词： PME-乙醇-柴油差示扫描量热仪结晶热力学相平衡

Effects of preconditioning with hyperbaric oxygen on neural cell apoptosis after spinal cord injury in rats

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双钙钛矿型氧化物基双掺杂碱土金属结构和电阻率性质研究

第十六届国际高气压医学学术会议暨第十七届全国高压氧医学...

作者： Peigang Lu Hua Feng yongzhi Xia Guoqi Gong mei Li Department of Neurosurgery Southwest Hospital Third Military Medical University Chengdu China

＜正＞Objective:To study the effects of preconditioning with hyperbaric oxygen on neural cell apoptosis and expression of Caspase-3 after spinal cord injury in rats at different ***:fifty-five adult Sprague-Dawley adult rats,weighing from 250 to 300g,were randomly divided into 3 groups,hyperbaric oxygen preconditional group（25,n=5）,normal injury group（25,n=5）and control group（5,n=5）.In the

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材料导报 2010年第S1期24卷 343-345页

作者：周永志李梅耿浩然张仲济南大学材料科学与工程学院济南大学理学院

以A;B′B″O;型氧化物为研究对象,利用溶胶凝胶法制备出双掺杂La、Ca的(Sr;La;Ca;)FeMoO;（0≤x≤0.30）多晶样品,研究了其结构和电阻率性质。通过XRD测试了其结构,结果显示样品质量优良,并分析了其共性与异性。利用SEM观察了其形貌特征... 详细信息

以A;B′B″O;型氧化物为研究对象,利用溶胶凝胶法制备出双掺杂La、Ca的(Sr;La;Ca;)FeMoO;（0≤x≤0.30）多晶样品,研究了其结构和电阻率性质。通过XRD测试了其结构,结果显示样品质量优良,并分析了其共性与异性。利用SEM观察了其形貌特征,结果显示样品致密性和连通性较好,部分区域有孔洞。利用EDS探测器对样品成分进行了分析,其电阻率呈先减小后增大的趋势,并分析了其变化机理。

关键词：双钙钛矿碱土金属晶体结构溶胶-凝胶法电阻率性质

通过与氧化石墨烯复合增强金属有机框架材料MOF(Ni)-74的电催化析氢性能

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材料导报 2018年第9期32卷 1417-1422页

作者：褚梅李曦李娜侯美静李小争董永志王璐武汉理工大学化学化工与生命科学学院武汉430070

采用溶剂热法制备了金属有机框架材料MOF(Ni)-74及其与氧化石墨烯(GO)的复合材料MOF(Ni)-GO,并利用线性伏安扫描(LSV)等电化学方法在N_2饱和的0.5mol/L H_2SO_4溶液中对材料的电催化性能进行了检测。实验结果表明,GO的掺杂能显著提升金... 详细信息

采用溶剂热法制备了金属有机框架材料MOF(Ni)-74及其与氧化石墨烯(GO)的复合材料MOF(Ni)-GO,并利用线性伏安扫描(LSV)等电化学方法在N_2饱和的0.5mol/L H_2SO_4溶液中对材料的电催化性能进行了检测。实验结果表明,GO的掺杂能显著提升金属有机框架材料MOF(Ni)-74的电催化活性。其中GO含量为8%时,所得复合材料表现出最好的电催化析氢活性,起始电势仅为-0.462V,塔菲尔斜率为110mV/dec,同时该材料也表现出很好的电化学稳定性。

关键词：金属有机框架(MOFs) MOF(Ni)-74 镍氧化石墨烯电催化析氢反应

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地面对卫星瞄准精度受大气湍流的影响分析

红外与激光工程 2013年第10期42卷 2687-2691页

作者：王彦斌刘永志黄成功李华姚梅亓凤杰王敏邹前进中国人民解放军63892部队第二炮兵驻天津地区军事代表室

分析了地面对卫星激光瞄准精度受大气湍流效应的影响。首先,提出了大气湍流作用下地面对卫星激光瞄准精度的概念。其次,采用多层相位屏的数值方法求解激光大气传输满足的抛物型方程,仿真研究了不同发射参数下地面对卫星的激光瞄准精度,... 详细信息

分析了地面对卫星激光瞄准精度受大气湍流效应的影响。首先,提出了大气湍流作用下地面对卫星激光瞄准精度的概念。其次,采用多层相位屏的数值方法求解激光大气传输满足的抛物型方程,仿真研究了不同发射参数下地面对卫星的激光瞄准精度,结果表明:地面对卫星的激光瞄准精度与激光束的发射口径成正比,发射口径越大,瞄准精度越高;而与激光束的发散角成反比,光束发散角越大,瞄准精度越低。最后,比较研究了不同瞄准精度下到达卫星入瞳处的功率以及功率密度。研究成果可为开展地面对抗卫星的试验提供理论依据和数据参考。

关键词：激光大气传输大气湍流效应瞄准精度多层相位屏法