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分布式驱动车辆操纵稳定性控制综述

汽车技术 2024年第1期 1-12页

作者：林贤坤卢彦希王志福杨忠义叶卓广西科技大学机械与汽车工程学院柳州545000 北京理工大学机械与车辆学院北京100000 广西科技大学自动化学院柳州545000

为研究分布式驱动车辆的驱动控制问题,从转向控制、独立驱动控制及2个系统联合控制等3个角度入手,分析了分布式驱动车辆操纵稳定性控制策略的研究进展。首先,基于转向控制技术对影响操纵稳定性的方面进行分类;其次,分析了分层式与集中... 详细信息

为研究分布式驱动车辆的驱动控制问题,从转向控制、独立驱动控制及2个系统联合控制等3个角度入手,分析了分布式驱动车辆操纵稳定性控制策略的研究进展。首先,基于转向控制技术对影响操纵稳定性的方面进行分类;其次,分析了分层式与集中式控制结构的特点;然后,分析了基于控制结构的操纵稳定性研究;最后,结合分布式驱动车辆操稳性改善的研究现状和技术进展,展望了未来的发展趋势。

关键词：分布式驱动轮毂电机操纵稳定性独立转向独立驱动

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输尿管梗阻对新生大鼠肾盂功能及起搏细胞的影响

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中华实用儿科临床杂志 2024年第3期39卷 215-220页

作者：任川川程光阳李晓洁王焱冶卓张国贤王庆伟文建国郑州大学第一附属医院泌尿外科郑州450052 河南职业技术学院基础教学部郑州450046

目的探讨新生大鼠单侧输尿管梗阻对肾盂蠕动功能及起搏细胞的影响。方法动物实验研究。2日龄新生SD大鼠36只,根据随机数字表法分为单侧输尿管部分梗阻(PUUO)组、单侧输尿管完全梗阻(CUUO)组和假手术组,每组12只。术后1周进行肾盂穿刺测... 详细信息

目的探讨新生大鼠单侧输尿管梗阻对肾盂蠕动功能及起搏细胞的影响。方法动物实验研究。2日龄新生SD大鼠36只,根据随机数字表法分为单侧输尿管部分梗阻(PUUO)组、单侧输尿管完全梗阻(CUUO)组和假手术组,每组12只。术后1周进行肾盂穿刺测压,测压后处死幼鼠,取左侧肾盂输尿管固定后用于组织学检测。记录并比较各组幼鼠不同灌注速度时肾盂压力、蠕动波频率、波幅等参数,同时比较各组肾盂起搏细胞(非典型平滑肌细胞和Cajal样间质细胞)的变化情况。2组间比较采用独立样本t检验,3组比较采用单因素方差分析。结果假手术组肾盂压力随灌注速度增加而缓慢增加;蠕动频率随灌注速度增加而快速升高,达最大值后随灌注速度增加而降低。蠕动波振幅随灌注速度增加呈现先升高后降低。PUUO组肾盂压力随灌注速度增加而快速增加,且均高于假手术组;蠕动频率较假手术组高,在40 mL/h之前的蠕动频率较为接近,但灌注速度再增加时,蠕动波频率开始下降。蠕动波振幅随灌注速度增加出现快速升高而后下降,且下降速度较假手术组快。CUUO组肾盂基础压力为12 cmH2O(1 cmH2O=0.098 kPa),但在5 mL/h的灌注速度下,肾盂压力逐渐升高,未出现平台期,直至肾盂压力达73 cmH2O时,灌注液自穿刺针旁逆行流出,肾盂压力稍下降后达到平衡,整个过程未出现规律肾盂蠕动波。3组肾盂组织免疫荧光染色分析显示,起搏细胞均位于肾盂壁的平滑肌中,假手术组阳性率最高,PUUO组次之,CUUO组最低。结论输尿管梗阻对肾盂蠕动功能有显著影响,其对蠕动频率、幅度及肾盂压力等产生的影响有一定规律可循;肾盂起搏细胞减少可能参与输尿管梗阻导致的肾盂蠕动功能改变,但起搏细胞如何调节肾盂输尿管蠕动仍需进一步研究。

关键词：输尿管梗阻 Cajal样间质细胞大鼠新生肾盂蠕动功能

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2020—2023年秦皇岛市蚊蝇密度监测

中华卫生杀虫药械 2024年第3期30卷 238-240,244页

作者：叶茁李兵李红梅张紫阳秦皇岛市疾病预防控制中心河北秦皇岛066000

目的了解秦皇岛市蚊类和蝇类密度、种群分布,为防治工作提供参考。方法采用诱蚊灯与笼诱法分别对蚊类和蝇类进行监测。结果 2020—2023年秦皇岛市蚊类和蝇类密度分别是0.59只/(灯·h)、1.54只/笼,监测的蚊类以淡色库蚊种群为主,在整... 详细信息

目的了解秦皇岛市蚊类和蝇类密度、种群分布,为防治工作提供参考。方法采用诱蚊灯与笼诱法分别对蚊类和蝇类进行监测。结果 2020—2023年秦皇岛市蚊类和蝇类密度分别是0.59只/(灯·h)、1.54只/笼,监测的蚊类以淡色库蚊种群为主,在整体监测到的蚊类中占比为90.67%,监测到的蝇类以家蝇为主,占比为44.93%。每年7月蚊蝇的密度最高。在牲畜窝棚中蚊密度最高,而在农贸市场、餐饮外环境以及绿化带等环境中,蝇密度比较高。结论农户以及牲畜窝棚蚊密度高,农贸市场、餐饮外环境以及绿化带蝇密度高,需要加强对蚊蝇的防治工作。

关键词：秦皇岛市蚊蝇监测

Receiver function imaging of dense seismic array and deep dynamic mechanism beneath the eastern South China

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Science China Earth Sciences 2023年第6期66卷 1289-1308页

作者： Rubing HAN Dinghui YANG Qiusheng LI Rong HUANG Hongshuang ZHANG Jiangtao LI Hao CHEN zhuo ye Wei FU Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China Institute of Geophysics and Geomatics China University of GeosciencesWuhan 430074China School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330001China SinoProbe Center Chinese Academy of Geological SciencesBeijing 100037China College of Transportation Engineering Nanjing Tech UniversityNanjing 211816China

The Mesozoic tectonic framework of the eastern South China is mainly controlled by subduction,turning toward,and rollback of the Pacific *** studies of receiver function imaging and ambient noise tomography have revealed the“Yshaped”thinnest crustal belt in the eastern South China under the overall extension of the ***,the deep dynamic environment and formation mechanisms of the thin crustal belt remain *** we obtained high-resolution images of the crustal thickness and Poisson’s ratio in the eastern South China Block applying the recently proposed H-κ-c receiver function method,using data recorded by 305 dense portable broadband stations and 219 permanent stations ***,we discussed the deep dynamic formation mechanism of the“Y-shaped”thinnest crustal belt coupled with two common conversion point stacked images at key *** show that the average crustal thickness of the study area is 33 km(thin crust)and the average Poisson’s ratio is 0.24(low ratio).The overall crustal thinning toward the continental margin is likely because eastern South China was in a back-arc extension environment,which was induced by the rollback of the subducted plate in the Early *** crustal thickness of the“Y-shaped”thinnest crustal belt is<30 km,which is 3-5 km thinner than that outside the *** eastern branch is distributed along the trajectory of Nanchang-Ji’an-Ganzhou-Shaoguan-Guangzhou,and the western branch is around the Jianghan-Xiangzhong Basin,both of which intersect in *** eastern branch of the thin crustal zone indicates the potential location of the Pacific subduction slab breakoff,and the formation mechanism may be related to the interaction of deep-shallow processes,including the upwelling of mantle heat flow through the slab window and transtensional pre-existing *** developed a dynamic model that combines subduction-breakoff-rollback processes of the Paleo-Pacific Plate and accomp

关键词： Eastern South China Block Dense seismic array Receiver function “Y-shaped”thinnest crustal belt Slab breakoff

Buckling Optimization of Curved Grid Stiffeners through the Level Set Based Density Method

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 711-733页

作者： zhuo Huang ye Tian Yifan Zhang Tielin Shi Qi Xia State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan430074China

Stiffened structures have great potential for improvingmechanical performance,and the study of their stability is of great *** this paper,the optimization of the critical buckling load factor for curved grid stiffeners is solved by using the level set based density method,where the shape and cross section(including thickness and width)of the stiffeners can be optimized *** grid stiffeners are a combination ofmany single stiffenerswhich are projected by the corresponding level set *** thickness and width of each stiffener are designed to be independent variables in the projection applied to each level set ***,the path of each single stiffener is described by the zero iso-contour of the level set *** the single stiffeners are combined together by using the p-norm method to obtain the stiffener *** proposed method is validated by several numerical examples to optimize the critical buckling load factor.

关键词： Stiffener buckling optimization shape and cross section level set based density

Role of mitochondria in the pathogenesis and treatment of glaucoma

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Chinese Medical Journal 2013年第22期126卷 4358-4365页

作者： YANG Xue-jiao GE Jian zhuo ye-hong State Key Laboratory of Ophthalmology Zhongshan Ophthahnic Center Sun Yat-Sen University Guangzhou Guangdong 510060 China

Objective To gain insight into the potential mechanism of mitochondria dysfunction in pathogenesis, progression and therapeutic management of glaucoma. Data sources The data used in this review were mainly published in English from 2000 to present obtained from PubMed. The search terms were ＂mitochondria＂, ＂glaucoma＂ and ＂trabecular meshwork＂ or ＂retinal ganglion cells＂. Study selection Articles studying the mitochondria-related pathologic mechanism and treatment of glaucoma were selected and reviewed. Results Mitochondrial dysfunction or injury was demonstrated in different eye tissue of glaucoma. A variety of potential injuries （light, toxic materials, oxidative injury, mechanical stress, aging, etc.） and the inherent DNA defects are deemed to cause mitochondrial structural and functional destruction in trabecular meshwork cells, retinal ganglion cells, etc. of glaucoma. In addition, various new experimental and therapeutic interventions were used to preserve mitochondrial function, which may be useful for protecting against optic nerve degeneration or reducing the death of retinal ganglion cells in glaucoma. Conclusions Mitochondria play an important role in the pathogenesis of glaucoma, various strategies targeting mitochondrial protection might provide a promising way to delay the onset of glaucoma or protect RGCs against glaucomatous damage.

关键词： mitochondria glaucoma, trabecular meshwork cells, retinal ganglion cells

Magnetic field and performance analysis of a tubular permanent magnet linear synchronous motor applied in elevator door system

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第4期9卷 572-576页

作者： Xiao LIU Yun-yue ye zhuo ZHENG Qin-fen LU School of Electrical Engineering Zhejiang University Hangzhou 310027 China

A novel elevator door driven by tubular permanent magnet linear synchronous motor (TPMLSM) is presented. This TPMLSM applies axial magnet array topology of the secondary rod, air-cored armature windings and slotless structure of the forcer to improve the stability of the thrust. The influence of two major dimensions, the pitch and radius of the permanent magnet (PM), on magnetic field was studied and the best values were given by the finite element analysis (FEA). The magnetic field, back EMF and thrust of the motor were analyzed and the PM size was optimized to reduce the harmonic components of the magnetic field and improve the performance of the motor. Predicted results are validated by the experiment. It is shown that the performance of the motor and the novel elevator door system is satisfying.

关键词：永磁电机直线电机线形同步发电机技术性能

结构性权力与国际制度复杂性耦合——基于中美制度互动的正负案例对比

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世界经济与政治 2023年第4期 126-155,160页

作者：卓晔吉林大学行政学院长春130012

中美两国在竞争关系下的制度互动致使一些国际制度复杂性出现“脱钩”,另一些却出现耦合。因此,何种因素导致国际制度复杂性走向耦合则成为研究的核心问题。既有大都研究聚焦于不同制度的差异及制度主导国之间的对立,未能解释国际制度... 详细信息

中美两国在竞争关系下的制度互动致使一些国际制度复杂性出现“脱钩”,另一些却出现耦合。因此,何种因素导致国际制度复杂性走向耦合则成为研究的核心问题。既有大都研究聚焦于不同制度的差异及制度主导国之间的对立,未能解释国际制度复杂性在国家间竞争关系中走向耦合的现象。为解决理论与现实政治不符的缺陷,作者重点考察了国际制度复杂性中参与多项制度的多重成员国家,并探索其结构性权力对国际制度复杂性的影响。由于在国际制度复杂性中加入了多项制度,多重成员国家能够对制度的合法性和效能产生影响,进而在国际制度复杂性中具备结构性权力。这种结构性权力既能产生制度间趋同的聚合效应,又能够推动制度间的差异化分工,进而塑造国际制度复杂性的耦合。当多重成员国家依附制度主导国时,前者便丧失了结构性权力,进而产生“制度俘获”并加剧国际制度复杂性的分散化,最终致使国际制度复杂性“脱钩”。将当前中美关系中亚洲基础设施投资银行和世界银行的耦合、湄公河—美国伙伴关系与澜湄合作机制的“脱钩”作为正负案例进行对比分析,上述理论得到验证。

关键词：国际制度复杂性结构性权力亚投行湄公河—美国伙伴关系全球治理

Wave field in two-phase media by the convolutional differentiator method

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Earthquake Science 2011年第5期24卷 409-418页

作者： zhuo ye Xinfu Li Qiusheng Li Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China School of Geophysics and Information Technology China University of Geosciences Beijing 100083 China Earthprobe and Geodynamics Open Laboratory of Chinese Academy of Geological Sciences Beijing 100037 China

This paper applies the convolutional differentiator method, based on generalized Forsyte orthogonal polynomial （CFPD）, to simulate the seismic wave propagation in two-phase media. From the numerical results we can see that three types of waves, fast P-waves, S-waves and slow P-waves, can be observed in the seismic wave field. The experiments on anisotropic models demonstrate that the wavefront is elliptic instead of circular and S-wave splitting occurs in anisotropic two-phase media. The research has confirmed that the rules of elastic wave propagation in fluid-saturated porous media are controlled by Biot＇s theory. Experiment on a layered fault model shows the wavefield generated by the interface and the fault very well, indicating the effectiveness of CFPD method on the wavefield modeling for real layered media in the Earth. This research has potential applications to the investigation of Earth＇s deep structure and oil/gas exploration.

关键词： convolutional Forsyte polynomial differentiator (CFPD) two-phase media seismicwave field numerical modeling