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Recent advancements in thermal conductivity of magnesium alloys

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Journal of Magnesium and Alloys 2024年第5期12卷 1687-1708页

作者： Hao Lv Jun Tan Qian Yuan Fanglei Wang Yunxuan Zhou quan Dong Aitao Tang Jürgen Eckert Bin Jiang Fusheng pan National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China National Key Laboratory of Advanced Casting Technologies Chongqing UniversityChongqing 400044China Department of Materials Science Chair of Materials PhysicsMontanuniversität LeobenJahnstraße 12Leoben A-8700Austria Erich Schmid Institute of Materials Science Austrian Academy of SciencesJahnstraße 12Leoben A-8700Austria

As highly integrated circuits continue to advance,accompanied by a growing demand for energy efficiency and weight reduction,materials are confronted with mounting challenges pertaining to thermal conductivity and lightweight *** virtue of numerous intrinsic mechanisms,as a result,the thermal conductivity and mechanical properties of the Mg alloys are often inversely related,which becomes a bottleneck limiting the application of Mg *** on several effective modification methods to improve the thermal conductivity of Mg alloys,this paper describes the law of how they affect the mechanical properties,and clearly indicates that peak aging treatment is one of the best ways to simultaneously enhance an alloy's thermal conductivity and mechanical *** the most frequently used Mg alloy,cast alloys exhibit substantial potential for achieving high thermal ***,recent reports indicate that hot deformation can significantly improve the mechanical properties while maintaining,and potentially slightly enhancing,the alloy's thermal *** presents a meaningful way to develop Mg alloys for applications in the field of small-volume heat dissipation components that require high *** comprehensive review begins by outlining standard testing and prediction methods,followed by the theoretical models used to predict thermal conductivity,and then explores the primary influencing factors affecting thermal *** review summarizes the current development status of Mg alloys,focusing on the quest for alloys that offer both high thermal conductivity and high *** concludes by providing insights into forthcoming prospects and challenges within this field.

关键词： Mg alloy Thermal conductivity Mechanical properties Solute atom Second phase

Adaptive polarization i mage fusion based on regional energy dynamic weighted average

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Optoelectronics Letters 2005年第3期1卷 224-227页

作者： ZHAO Yong-qiang pan quan ZHANG Hong-cai College of Automation Northwest Polytechnic University Xi＇an 710072 China

According to the principle of polarization imaging and the relation between Stokes parameters and the degree of linear polarization, there are much redundant and complementary information in polarized images. Since man-made objects and natural objects can be easily distinguished in images of degree of linear polarization and images of Stokes parameters contain rich detailed information of the scene, the clutters in the images can be removed efficiently while the detailed information can be maintained by combining these images. An algorithm of adaptive polarization image fusion based on regional energy dynamic weighted average is proposed in this paper to combine these images. Through an experiment and simulations,most clutters are removed by this algorithm. The fusion method is used for different light conditions in simulation, and the influence of lighting conditions on the fusion results is analyzed.

关键词：偏振现象图象处理参数设计模拟算法

A Dynamic Programming Based Track-Before-Detect Algorithm for Multi-sensor Systems

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A Dynamic Programming Based Track-Before-Detect Algorithm fo...

第37届中国控制会议

作者： Zhen Guo Zengfu Wang Yumei Hu quan pan School of Automation Northwestern Polytechnical University

In this paper, a dynamic programming（DP） framework for the implementation of track-before-detect（TBD） in multisensor systems is presented. The proposed framework is composed of a pre-processing procedure and a DP-TBD processor. A novel form of equivalent measurements is employed in pre-processing stage which effectively fuses measurements from different sensors, leading to the reduction of computational cost. Numerical examples demonstrate that the proposed algorithm can take advantage of the information from multiple sensors and therefore obtain better performance.

关键词： track-before-detect multi-sensor systems dynamic programming

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作业车间动态调度研究

南京航空航天大学学报 2005年第2期37卷 262-268页

作者：潘全科朱剑英聊城大学计算机学院聊城252059 南京航空航天大学机电学院南京210016

系统地研究了动态环境中受多种资源制约的多目标作业车间批量调度问题,提出了一种新调度算法。该算法采用基于周期和事件驱动的调度策略将动态调度过程分成多个连续静态调度区间,然后在各区间内采用多目标的遗传算法优化调度方案。本文... 详细信息

系统地研究了动态环境中受多种资源制约的多目标作业车间批量调度问题,提出了一种新调度算法。该算法采用基于周期和事件驱动的调度策略将动态调度过程分成多个连续静态调度区间,然后在各区间内采用多目标的遗传算法优化调度方案。本文讨论了再调度周期的确定方法、待加工工件的选取原则、批量生产的处理方法等。针对研究的调度问题设计了包含工序及其加工机床、工人、运输小车信息的染色体编码,并对染色体的解码方法、选择方法、交叉方法和变异方法进行了研究。仿真结果表明,该算法可行,优越性明显。

关键词：动态作业调度多目标遗传算法批量生产

DE-JSMA:面向SAR-ATR模型的稀疏对抗攻击算法

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西北工业大学学报 2023年第6期41卷 1170-1178页

作者：金夏颖李扬潘泉西北工业大学网络空间安全学院陕西西安710072 西北工业大学自动化学院陕西西安710072

DNN易受攻击的特点使得以智能算法为识别手段的SAR-ATR系统也存在一定脆弱性。为验证其脆弱性,结合SAR图像特征稀疏的特点,在显著图对抗攻击算法和差分进化算法基础上提出了DE-JSMA稀疏攻击算法,精确筛选出对模型推理结果影响较大的显... 详细信息

DNN易受攻击的特点使得以智能算法为识别手段的SAR-ATR系统也存在一定脆弱性。为验证其脆弱性,结合SAR图像特征稀疏的特点,在显著图对抗攻击算法和差分进化算法基础上提出了DE-JSMA稀疏攻击算法,精确筛选出对模型推理结果影响较大的显著特征后,为显著特征优化出合适的特征值。为了更全面地验证攻击的有效性,构建了一种结合攻击成功率和对抗样本平均置信度的新指标Fc值。实验结果表明,在没有增加过多耗时,且保证高攻击成功率情况下,DE-JSMA将只能定向攻击的JSMA扩展到了非定向攻击场景,且在2种攻击场景下均实现了可靠性更高、稀疏性更优的稀疏对抗攻击,仅扰动0.31%与0.85%的像素即可达到100%与78.79%以上的非定向与定向攻击成功率。

关键词：合成孔径雷达自动目标识别深度学习对抗攻击稀疏攻击

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干涉仪对辐射源快速精确定位方法研究

系统仿真学报 2005年第6期17卷 1525-1527页

作者：刘延峰潘泉西北工业大学自动化学院陕西西安710072

干涉仪属于无源定位系统,该技术有着重要的军事应用背景,现有国内单站无源定位都存在定位时间长,精度较低的问题。给出了仅利用干涉仪的多普勒频移量测值,通过扩展卡尔曼滤波的方法对固定辐射源定位,该方法与传统方法相比,具有精度高、... 详细信息

干涉仪属于无源定位系统,该技术有着重要的军事应用背景,现有国内单站无源定位都存在定位时间长,精度较低的问题。给出了仅利用干涉仪的多普勒频移量测值,通过扩展卡尔曼滤波的方法对固定辐射源定位,该方法与传统方法相比,具有精度高、收敛速度快,对初值不敏感的优点。仿真结果证明了本方法的有效性。

关键词：干涉仪扩展卡尔曼滤波多普勒频移无源定位

A survey on multi-sensor fusion based obstacle detection for intelligent ground vehicles in off-road environments

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Frontiers of Information Technology & Electronic Engineering 2020年第5期21卷 675-692页

作者： Jin-wen HU Boyin ZHENG Ce WANG Chun-hui ZHAO Xiao-lei HOU quan pan Zhao XU Key Laboratory of Information Fusion Technology North western Polytechnical UniversityXi'an 710072China

With the development of sensor fusion technologies, there has been a lot of research on intelligent ground vehicles, where obstacle detection is one of the key aspects of vehicle driving. Obstacle detection is a complicated task, which involves the diversity of obstacles, sensor characteristics, and environmental conditions. While the on-road driver assistance system or autonomous driving system has been well researched, the methods developed for the structured road of city scenes may fail in an off-road environment because of its uncertainty and diversity.A single type of sensor finds it hard to satisfy the needs of obstacle detection because of the sensing limitations in range, signal features, and working conditions of detection, and this motivates researchers and engineers to develop multi-sensor fusion and system integration methodology. This survey aims at summarizing the main considerations for the onboard multi-sensor configuration of intelligent ground vehicles in the off-road environments and providing users with a guideline for selecting sensors based on their performance requirements and application ***-of-the-art multi-sensor fusion methods and system prototypes are reviewed and associated to the corresponding heterogeneous sensor configurations. Finally, emerging technologies and challenges are discussed for future study.

关键词： Multi-sensor fusion Obstacle detection Off-road environment Intelligent vehicle Unmanned ground vehicle

将粒子残差一致性度量的滤波算法用于纯方位被动跟踪

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红外与毫米波学报 2010年第1期29卷 75-80页

作者：胡振涛潘泉杨峰西北工业大学自动化学院陕西西安710072

在低信扰比条件下的纯方位被动跟踪中,针对量测似然度评估粒子权重的方式对于滤波结果的不利影响,提出了一种基于粒子残差一致性度量的粒子滤波算法.首先,利用粒子残差实现采样粒子由状态空间到量测空间的映射变换;在此基础上,通过置信... 详细信息

在低信扰比条件下的纯方位被动跟踪中,针对量测似然度评估粒子权重的方式对于滤波结果的不利影响,提出了一种基于粒子残差一致性度量的粒子滤波算法.首先,利用粒子残差实现采样粒子由状态空间到量测空间的映射变换;在此基础上,通过置信度距离和置信度矩阵的构建及求解,完成对于粒子权重的合理度量.新的粒子权重评估方法实现了对于最新量测信息及粒子间蕴含冗余和互补信息的充分提取和利用,使得粒子权重度量结果更加稳定和可靠.最后,仿真实验验证了算法的有效性.

关键词：粒子滤波纯方位被动跟踪信扰比一致性度量

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基于事件触发机制的网络控制研究综述

控制与决策 2018年第6期33卷 969-977页

作者：杨飞生汪璟潘泉西北工业大学自动化学院西安710072 东北大学流程工业综合自动化国家重点实验室沈阳110004

全面综述基于事件的控制系统的研究现状与最新成果.主要介绍事件驱动通信机制的各种类型和事件触发控制的主要研究内容,包括不同的建模方法以及控制器与事件产生器的联合设计方案,重点对时延系统建模方法进行分析,将事件触发闭环控制系... 详细信息

全面综述基于事件的控制系统的研究现状与最新成果.主要介绍事件驱动通信机制的各种类型和事件触发控制的主要研究内容,包括不同的建模方法以及控制器与事件产生器的联合设计方案,重点对时延系统建模方法进行分析,将事件触发闭环控制系统建模成连续时滞模型.此外,关于网络诱导因素对事件触发机制的影响以及网络化事件触发控制的一些应用也进行说明.最后,提出目前研究工作所存在的不足,以及下一步需要解决的开放难题.

关键词：事件触发控制网络控制系统时滞模型事件与控制联合设计