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Hazard-evaluation-oriented Moving Horizon Parallel Steering Control for Driver-Automation Collaboration During Automated Driving

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IEEE/CAA Journal of Automatica Sinica 2018年第6期5卷 1062-1073页

作者： Hongyan Guo Linhuan Song Jun Liu Fei-Yue Wang Dongpu Cao Hong Chen Chen Lv Partick Chi-kwong luk State key Laboratory of Automotive Simulation and Control and the Department of Con-trol Science and Engineering Jilin University(Campus Nanling)Changchun130025China State key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China Research Center for Military Computational Experiments and Parallel Systems Technology National University of Defense TechnologyChangsha 410073China Mechanical and Mechatronics Engineering Department at the University ot Waterloo 200 University Avenue West WaterlooONNZL3G1Canada Department of Automotive Engineering Cranfield UniversityBedfordshire MK43 0ALUK School of Water Energy and EnvironmentCranfield UniversityBedfordshire MK43 0ALUK

Prompted by emerging developments in connected and automated vehicles, parallel steering control, one aspect of parallel driving, has become highly important for intelligent vehicles for easing the burden and ensuring the safety of human drivers. This paper presents a parallel steering control framework for an intelligent vehicle using moving horizon *** framework considers lateral stability, collision avoidance and actuator saturation and describes them as constraints, which can blend the operation of a human driver and a parallel steering controller effectively. Moreover, the road hazard and the steering operation error are employed to evaluate the operational hazardous of an intelligent vehicle. Under the hazard evaluation,the intelligent vehicle will be mainly operated by the human driver when the vehicle operates in a safe and stable *** automated steering driving objective will play an active role and regulate the steering operations of the intelligent vehicle based on the hazard evaluation. To verify the effectiveness of the proposed hazard-evaluation-oriented moving horizon parallel steering control approach, various validations are conducted, and the results are compared with a parallel steering scheme that does not consider automated driving situations. The results illustrate that the proposed parallel steering controller achieves acceptable performance under both conventional conditions and hazardous conditions.

关键词： Hazard evaluation intelligent vehicle atera stability moving horizon optimization paralle steering control

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Antioxidant efficiency of lycopene on oxidative stress-induced damage in bovine spermatozoa

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Journal of Animal Science and Biotechnology 2017年第1期8卷 67-79页

作者： Eva Tvrdá Anton kovácik Eva Tusimová Dusan Paál Alica Mackovich Jakhongir Alimov Norbert luk.c Department of Animal Physiology Faculty of Biotechnology and Food Sciences Slovak University of Agriculture in Nitra Tr. A. Hlinku 2 Nitra 94976 Slovakia AgroBioTech Research Centre Slovak University of Agriculture in Nitra Tr. A. Hlinku 2 Nitra 94976 Slovakia Department of Botany and Genetics Faculty of Natural Sciences Constantine the Philosopher University in Nitra Nabbrezie mladeze 91 Nitra 94974 Slovakia Department of General Biology Faculty of Natural Sciences Gulistan State University 4th Microrayon Guliston 120100 Syrdarya Uzbekistan.

Background： Lycopene（LYC） is a natural carotenoid with powerful reactive oxygen species（ROS） scavenging activities. The aim of this study was to investigate if lycopene has the ability to reverse ROS-mediated alterations to the motility, viability and intracellular antioxidant profile of bovine spermatozoa subjected to ferrous ascorbate（Fe AA）. Spermatozoa were washed out of fresh bovine semen, suspended in 2.9 % sodium citrate and subjected to LYC treatment（0.25, 0.5, 1 or 2 mmol/L） in the presence or absence of Fe AA（150 μmol/L Fe SO4 and 750 μmol/L ascorbic acid） during a 6 h in vitro culture. Spermatozoa motion characteristics were assessed using the Sperm Vision？computer-aided sperm analysis（CASA） system. Cell viability was examined with the metabolic activity（MTT） assay,ROS generation was quantified via luminometry and the nitroblue-tetrazolium（NBT） test was applied to quantify the intracellular superoxide formation. Cell lysates were prepared at the end of the in vitro culture to investigate the intracellular activity of superoxide dismutase（SOD）, catalase（CAT）, glutathione peroxidase（GPx） as well as the concentrations of glutathione（GSH） and malondialdehyde（MDA）.Results： FeA A treatment led to a reduced spermatozoa motility（P 〈 0.001）, viability（P 〈 0.001） and a decline of the antioxidant capacity of spermatozoa（P 〈 0.001） but increased the ROS generation（P 〈 0.001）, superoxide production（P 〈 0.001） and lipid peroxidation（P 〈 0.001）. LYC administration resulted in a preservation of the spermatozoa motion parameters（P 〈 0.001）, mitochondrial activity（P 〈 0.001） and antioxidant characteristics（P 〈 0.001 with respect to SOD;P 〈 0.01 in relation to CAT; P 〈 0.05 as for GPx and GSH） with a concentration range of 1 and 2 mmol/L LYC revealed to be the most ***： Our results suggest that LYC exhibits significant ROS-scavenging and antioxidant properties which may prevent spermatozoa alterations caused by oxidative stress, and preserve the functional

关键词： Antioxidants Bulls Ferrous ascorbate Lycopene Oxidative stress Spermatozoa

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Corrosion and mechanical properties of a novel biomedical WN43magnesium alloy prepared by spark plasma sintering

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Journal of Magnesium and Alloys 2021年第3期9卷 853-865页

作者： Michal knapek Mária Zemková Adam Gres Eva Jablonská Frantisek luk.c Robert král Jan Bohlen Peter Minárik Charles University Faculty of Mathematics and PhysicsKe Karlovu 512116 PragueCzech Republic Nuclear Physics Institute of CAS Řež13025068ŘežCzech Republic University of Chemistry and Technology Department of Biochemistry and MicrobiologyTechnická5Prague16628 PragueCzech Republic Institute of Plasma Physics of CAS Za Slovankou 318200 PragueCzech Republic Helmholtz-Zentrum Geesthacht Magnesium Innovation Centre(MagIC)D21502 GeesthachtGermany

Alloying of Mg with rare-earth(RE)elements proved to be beneficial for their in-vitro and in-vivo *** this work,a novel WN43(Mg-4 wt%Y-3 wt%Nd)alloy with a well-defined composition was prepared,where,unlike in the commercial WE43 alloy,the possibly harmful RE mischmetal was substituted by less toxic Nd.A modern spark plasma sintering(SPS)technique was used to effectively produce WN43 samples from atomized *** temperatures of 400℃-550℃ and holding times of 3 or 10 min were used and wellcompacted final materials were successfully *** was shown that a superior combination of corrosion and mechanical properties was attained in the samples sintered at 500℃ and 550℃,while the effect of sintering time was rather *** performance of this material was exceptional within the group of Mg alloys prepared by powder metallurgy and comparable with conventionally prepared ***,it was shown that a great variety of mechanical and corrosion characteristics can be obtained by altering the SPS parameters so as to fulfill case-specific requirements typical of biomedical ***,the novel WN43 alloy prepared by SPS seems to be a particularly suitable material for biomedical use.

关键词： Magnesium Biocompatibility Powder Sintering Corrosion Rare earth element

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结合频域有限差分法分析二维柱体电磁散射

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电子科技大学学报 2001年第5期30卷 445-448页

作者：朱汉清吴正德 k.M.luk 电子科技大学应用物理所成都610054 香港城市大学电子工程系

引入多波前算法,提出了结合频域有限差分法分析二维柱体的电磁散射问题。数值计算过程中利用Murs二阶吸收边界条件和场平均吸收条件截断网格;作为算例,分析了一无限长理想导体柱对平面电磁波的散射,由于使用了多波前算法求解差分矩阵方... 详细信息

引入多波前算法,提出了结合频域有限差分法分析二维柱体的电磁散射问题。数值计算过程中利用Murs二阶吸收边界条件和场平均吸收条件截断网格;作为算例,分析了一无限长理想导体柱对平面电磁波的散射,由于使用了多波前算法求解差分矩阵方程,大大地减少了计算时间,数值结果表明了该方法的有效性。

关键词：频域有限差分法多波前算法吸收边界条件电磁散射二维柱体

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A Wideband Circularly Polarized Patch Antenna with Conical Radiation Pattern

A Wideband Circularly Polarized Patch Antenna with Conical R...

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2005年海峡两岸三地无线科技学术会

作者： k.L.Lau k.M.luk Department of Electronic Engineering City University of Hong Kong 83 Tat Chee AvenueKowloon Hong Kong SAR Member IEEE Department of Electronic Engineering City University of Hong Kong 83 Tat Chee AvenueKowloon Hong Kong SAR Fellow IEEE

A circularly polarized conical-beam patch antenna that employs a hybrid feeding mechanism for wideband operation is presented in this paper. It is implemented through using a pair of L-probes and apertures, which are connected by the feeding network, to excite the circular patch in orthogonal directions. The patch is supported by two plastic posts of 0.084 λ0 height in the air, where λ0 is the free space wavelength at 2.53GHz. This antenna possesses an impedance bandwidth of 28.2% (SWR ks located at around θ=±3°over these bandwidths. Moreover, its 3-dB gain bandwidth and peak gain are 32.4% and 5.5dBi, respectively.

关键词： Index Terms: Circular polarization Conical-beam Patch antenna

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分析波导问题的松弛迭代区域分解法

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电子与信息学报 2002年第11期24卷 1687-1691页

作者：朱汉清龙毅吴正德 k.M.luk 电子科技大学应用物理所成都610054 香港城市大学电子工程系

针对基于Schwarz交替法的选代区域分解法,在分析波导问题时遇到的不收敛的困难,该文从实际场分布出发,在划分区域的虚拟边界上给出了连接子域的吸收虚拟边界条件,用以保证相邻子域间的波传播,从而构建了一种能够分析波导问题的收敛的迭... 详细信息

针对基于Schwarz交替法的选代区域分解法,在分析波导问题时遇到的不收敛的困难,该文从实际场分布出发,在划分区域的虚拟边界上给出了连接子域的吸收虚拟边界条件,用以保证相邻子域间的波传播,从而构建了一种能够分析波导问题的收敛的迭代区域分解法。在此基础上进一步引入松弛算法,用于加快迭代收敛速度。数值计算结果表明了该方法的有效性。

关键词：区域分解法虚拟边界条件迭代算法松弛算法波导问题

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Characteristics of High Power Waveguides Based on the Theory of Degenerate Hyperelliptic Integrals

Characteristics of High Power Waveguides Based on the Theory...

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1996年中日联合微波技术会议

作者： Edward k.N.Yung k.M.luk City University of Hong kong Hong Kong

＜正＞Shown in Figure 1 is a general coaxial rectangular TEM transmission line [1],the characteristics of which are to be investigated;OABCDEO is a quarter of the line cross section. The interior of OABCDEO is transfo...

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An In-Wheel Switched Reluctance Motor for Electric Vehicles

An In-Wheel Switched Reluctance Motor for Electric Vehicles

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CES/IEEE 5th International Power Electronics and Motion Control Conference

作者： P.C.k.luk.P.Jinupun Cranfield University/Department of Aerospace Power and Sensors SwindonUnited Kingdom Cranfield University/Department of Aerospace Power and Sensors SwindonUnited Kingdom

＜正＞An alternative motor technology for electric drive-trains, in particular in use as an in-wheel drive, is presented. The technology is based on a simple double concentric stator structure with a ’yokeless’ rotor, which enables the motor to develop constant power with an extended range much closer to zero speed. A distinct feature of the new motor, which is based on switched reluctance, rests on an overlapping magnetic circuitry inherent in the wheel shape structure, resulting in a smooth but exceptionally high torque per current capability with minimum iron losses. Simulation and experimental results will be present to show the potential applications of the motor.

关键词： switched reluctance motors in-wheel motor electric vehicle

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ACCURATE MODELING OF PROBE FED CYLINDRICAL DIELECTRIC RESONATOR ANTENNA USING THE FDTD METHOD

ACCURATE MODELING OF PROBE FED CYLINDRICAL DIELECTRIC RESONA...

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1996年中日联合微波技术会议

作者： S.M.SHUM k.M.luk CITY UNIVERSITY OF HONG kONG Department of Electronic Engineering 83 Tat Chee AvenueHong Kong

＜正＞Accurate modeling of a probe fed cyiindrical dielectric resonator antenna using the FDTD method is *** numerical model includes the effect of the probe thickness and the air gaps between the bottom of the DR and the ground plane,and also around the feeding *** numerical results on both the input impedance and the radiation patterns of the DR antenna are compared to experimental results and good agreements are obtained.

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The City's Functions,Development Impetus and Realistic Options in Urbanization

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China City Planning Review 1988年第3期 24-32页

作者： Fan Lida luk.Wingnin

Like other products of industrializationand modernization,urbanization has manyfacets:an inevitable phenomenon in the so-cial development process,conflict with tra-dition,emergence of new problems,and theneed to choos... 详细信息

关键词： Pro

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