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China Petroleum Processing & Petrochemical Technology 2024年第3期26卷 158-172页

作者： Xia Yanqiu Chen Wenhao Jiang Zhirong yang kuo School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China

This study prepared four types of ionic liquid-modified polypyrrole(IL-modified PPy)as conductive additives and investigated their tribological performance and conductivity in polytetrafluoroethylene lubricating *** results indicated that IL-modified PPy effectively enhanced the anti-wear performance and conductivity of the base *** the additives,1-octyl-3-methylimidazolium tetrafluoroborate([OMIm][BF4])modified PPy showed superior performance compared to the other three additives,with the best effect observed at a mass fraction of 0.5%.X-ray photoelectron spectroscopy analysis revealed that IL-modified PPy forms a stable friction chemical film during the friction process,effectively enhancing the lubrication performance and conductivity of the base *** indicates broad potential applications in the field of conductive lubrication.

关键词： conductive lubricating grease ILs modified PPy anti-friction and anti-wear additive

落叶松中花旗松素的提取、抑菌作用及其与白屈菜红碱联用协同抑菌作用机理

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食品工业科技 2024年第1期45卷 128-136页

作者：荆立成杨跃杨阔李玫萱赵敏崔岱宗东北林业大学生命科学学院黑龙江哈尔滨150036

本研究以落叶松为原料,采用超声辅助乙醇热浸提法提取花旗松素。以大肠杆菌和金黄色葡萄球菌分别作为典型供试菌,通过观察细菌形态结构,测定细菌生长量、细胞膜泄漏、抗氧化酶系活性等变化情况,分析花旗松素抑菌效果。最终获得纯度达90... 详细信息

本研究以落叶松为原料,采用超声辅助乙醇热浸提法提取花旗松素。以大肠杆菌和金黄色葡萄球菌分别作为典型供试菌,通过观察细菌形态结构,测定细菌生长量、细胞膜泄漏、抗氧化酶系活性等变化情况,分析花旗松素抑菌效果。最终获得纯度达90%、提取率0.35%的花旗松素,且花旗松素对两种菌株的最小抑菌浓度均为1.2 mg/mL,抑菌率分别为81.12%、83.95%。通过电镜扫描后发现菌体表面被破坏伴有内容物泄漏。在Escherichia coli中,培养至24 h的1/2 MIC、1 MIC和2 MIC实验组OD_(260)测试值是同期对照组的1.18、1.52、1.88倍,检测到胞外β-半乳糖苷酶的相对活性分别为79.15%和70.1%。Bliss独立模型计算生长速率为0.0142,表明花旗松素和白屈菜红碱药物联用后对金黄色葡萄球菌表现为协同抑制作用。药物联用条件下,低浓度对细菌细胞膜破坏明显增强,抑菌效果更加显著,培养上清液中β-半乳糖苷酶活达87.01%,较2 MIC单独作用***酶活性高16.91%,24 h CAT、SOD和POD酶活较单独使用1 MIC浓度花旗松素对***作用要更高,分别是其1.28、1.25、1.11倍。研究将为花旗松素作为食品保鲜、防腐剂等产品的开发应用奠定理论基础。

关键词：花旗松素抑菌活性药物联用抑菌机制

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基于压缩感知的车地传输数据压缩算法研究

铁道机车车辆 2024年第1期44卷 8-15页

作者：叶鹏迪杨晓明杨阔吕赫动车组和机车牵引与控制国家重点实验室北京100081 中国铁道科学研究院集团有限公司机车车辆研究所北京100081 北京纵横机电科技有限公司北京100094

动车组车地无线传输受限于移动网络带宽限制,数据传输间隔较长,无法准确反映车载系统运行状态,提出了一种基于压缩感知的车地传输数据压缩算法,能够在地面高精度地还原车载原始数据的同时,大幅压缩车地传输数据量,提高了车地带宽利用率... 详细信息

动车组车地无线传输受限于移动网络带宽限制,数据传输间隔较长,无法准确反映车载系统运行状态,提出了一种基于压缩感知的车地传输数据压缩算法,能够在地面高精度地还原车载原始数据的同时,大幅压缩车地传输数据量,提高了车地带宽利用率,为动车组运行监测和故障应急指挥提供了更详实的数据支撑。

关键词：无线传输压缩感知列车控制和管理系统

CNT薄膜电热原位共固化复合材料板的温度均匀性研究

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固体火箭技术 2024年第2期47卷 237-245页

作者：杨阔潘宝宇李小龙赵志勇李宏伟西北工业大学材料学院西安710072 陕西省高性能精确成形技术与装备重点实验室西安710072 山东大学(威海)机电与信息工程学院威海264200

碳纳米管(CNT)薄膜电加热原位共固化复合材料是一种免热压罐的高效节能工艺方法,是国家“双碳”战略下制备碳纤维复合材料的新途径。然而,在固化过程中CNT薄膜电加热的不均匀温度分布,易导致复合材料成型质量差,进而限制其应用。为此,... 详细信息

碳纳米管(CNT)薄膜电加热原位共固化复合材料是一种免热压罐的高效节能工艺方法,是国家“双碳”战略下制备碳纤维复合材料的新途径。然而,在固化过程中CNT薄膜电加热的不均匀温度分布,易导致复合材料成型质量差,进而限制其应用。为此,研究揭示了CNT薄膜的电加热特性,阐明了加载电压、预浸料层数以及CNT薄膜层数/尺寸对复合材料温度分布的影响规律。结果表明,CNT薄膜具有高电热转换效率和良好的热稳定性,增加CNT薄膜层数和尺寸有利于改善复合材料面内温度分布。对于12层200 mm×180 mm预浸料,采用1.7倍尺寸的双层CNT薄膜可将复合材料固化过程中的面内温差降低至4℃以内,固化度达到99%以上,且相比传统烘箱固化,复合材料的拉伸强度提高了6.99%。研究结果为发展CNT薄膜电热原位共固化复合材料结构的温度均匀调控方法奠定了基础。

关键词： CNT薄膜电热原位共固化复合材料温度分布

A bioinspired path planning approach for mobile robots based on improved sparrow search algorithm

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Advances in Manufacturing 2022年第1期10卷 114-130页

作者： Zhen Zhang Rui He kuo yang School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444People’s Republic of China

In this paper,a bioinspired path planning approach for mobile robots is *** approach is based on the sparrow search algorithm,which is an intelligent optimization algorithm inspired by the group wisdom,foraging,and anti-predation behaviors of *** obtain high-quality paths and fast convergence,an improved sparrow search algorithm is proposed with three new ***,a linear path strategy is proposed,which can transform the polyline in the corner of the path into a smooth line,to enable the robot to reach the goal ***,a new neighborhood search strategy is used to improve the fitness value of the global optimal individual,and a new position update function is used to speed up the ***,a new multi-index comprehensive evaluation method is designed to evaluate these *** results show that the proposed algorithm has a shorter path and faster convergence than other state-ofthe-art studies.

关键词： Path planning Linear path strategy Sparrow search algorithm Multi-index comprehensive evaluation algorithm

A two-stage restoration of distorted underwater images using compressive sensing and image registration

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Advances in Manufacturing 2021年第2期9卷 273-285页

作者： Zhen Zhang Yu-Gui Tang kuo yang School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444People’s Republic of China

Imaging through a time-varying water surface exhibits severe non-rigid geometric distortions and motion ***,although the water surface possesses smoothness and temporal periodicity,random fluctuations are inevitable in an actual video ***,considering the distribution of information,the image structure contributes more to the *** this paper,a new two-stage restoration method for distorted underwater video sequences is *** the first stage,salient feature points,which are selected through multiple methods,are tracked across the frames,and the motion fields at all pixels are estimated using a compressive sensing solver to remove the periodic *** the second stage,the combination of a guided filter algorithm and an image registration method is applied to remove the structural-information-oriented residual ***,the experiment results show that the method outperforms other state-of-the-art approaches in terms of the recovery effect and time.

关键词： Periodic wave Random wave Compressive sensing(CS) Image registration(IR) Structural information

Theoretical Calculation of Energy Spectrum of YGG:Cr^(3+)and Thermal Shifts of Its R-Lines

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Communications in Theoretical Physics 2009年第5期51卷 914-918页

作者： yang kuo ZHANG Ji-Ping College of Physical Science and Technology Sichuan University Chengdu 610065 China Physical Department of A＇ba Teachers College Wenchuan 623000 China

With the strong-field scheme and trigonal bases, the complete d3 energy matrix in a trigonally distorted cubic-field has been constructed. By diagonalizing this matrix, the energy spectrum of YGG：Cr^3＋ at normal pressure and low temperature has been calculated. The g factor of the ground-state has been evaluated in terms of the energy spectrum. At the same time, by using the wavefunctions obtained from diagonalizing the complete d^3 energy matrix and Thermal Shifts theory, we calculate the thermal shifts of the sharp lines of YGG：Cr^3＋ and determine the relevant parameters. The calculated results are all in good agreement with the optical-spectrum and EPR experimental data. It is demonstrated that the obtained wavefunctions and the values of parameters are reasonable.

关键词： optical propenty electron-phonon interaction electronic structure thermal shift g factor

GPa级高压对Mg-3Al合金凝固组织及性能的影响

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热加工工艺 2024年第9期53卷 80-83页

作者：代鹏林华永乐阔洋叶杰林小娉东北大学材料科学与工程学院辽宁沈阳110819 东北大学轧制技术及连轧自动化国家重点实验室辽宁沈阳110819 东北大学秦皇岛分校资源与材料学院河北秦皇岛066004

利用XRD、SEM、EDS研究了Mg-3Al合金在石墨型铸造(5℃水冷,1 atm(1.01325×105Pa))和高压凝固条件下(2、3 GPa)的凝固组织及性能。结果表明,Mg-3Al合金在不同凝固压力下均由α-Mg组成,但其组织形貌由石墨型铸造的等轴状转变为高压下的... 详细信息

利用XRD、SEM、EDS研究了Mg-3Al合金在石墨型铸造(5℃水冷,1 atm(1.01325×105Pa))和高压凝固条件下(2、3 GPa)的凝固组织及性能。结果表明,Mg-3Al合金在不同凝固压力下均由α-Mg组成,但其组织形貌由石墨型铸造的等轴状转变为高压下的枝晶团状;GPa级高压能使Mg-3Al合金中更多的Al溶质固溶到α-Mg基体,同时也可以溶质原子的形式存在于枝晶间和晶界处发生偏聚现象。在3 GPa高压下Mg-3Al合金的抗压强度达到372 MPa,硬度达到46 HV,两者显著高于石墨型铸造Mg-3Al合金的356 MPa和41 HV。

关键词： Mg-3Al合金显微组织高压凝固力学性能

Properties of the Measurement Phase Operator in Dual-Mode Entangle Coherent States

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Chinese Physics Letters 2011年第6期28卷 122-125页

作者： HOU Shen-Yong yang kuo Department of Mathematics Yangtse River Normal UniversityChongqing 408003 Department of Physics A'ba Teachers CollegeChengdu 611741

A class of measurement phase operators of dual-mode is defined and their properties in a class of entangle coherent states are *** results indicate that the entangle coherent states display some non-classical squeezed... 详细信息

关键词： angle coherent operators

Effect of Banxiaxiexin Tang on treatment of functional dyspepsia: a Meta-analysis of randomized controlled trials

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Journal of Traditional Chinese Medicine 2014年第2期34卷 140-144页

作者： Yongkang Gan Huayi Liu Liu yang kuo yang School of Traditional Chinese Medicine Tianjin University of Traditional Chinese Medicine Department of Spleen and Stomach Tianjin Academy of Traditional Chinese Medicine Affiliated Hospitial

OBJECTIVE: To evaluate the efficacy of Banxiaxiexin Tang compared with Western Medicine in the treatment of functional dyspepsia(FD) through ***: Literature was searched in the following databases: MEDLINE, Excerpta Medica Database, Chinese Medical Current Contents, China Science and Technology Database, Chinese Biomedical Literature Database, and China National Knowledge Infrastructure. Randomized controlled trials evaluating the efficacy of Banxiaxiexin Tang for the treatment of FD were selected according to certain standards including clear general situation of patients, specific diagnostic criteria, definite clinical outcomes, etc. Articles were evaluated with quality assessment standards in the Cochrane Handbook for Systematic Reviews of Interventions. Meta-analysis was conducted with RevMan 5.0.23 ***: Ten articles with a total of 972 patients were included. The comparison of efficacy between Banxiaxiexin Tang and Western Medicine showed a combined effect size [OR=2.75, 95% CI(1.86-4.07)]andcombinedeffectofvalueofZ=5.07(P<0.000 01),suggesting a significant difference between the ***: Banxiaxiexin Tang was more effective thanWestern Medicine in treating FD.

关键词： Dyspepsia Randomized controlled trials Meta-analysis Banxiaxiexin Tang