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基于声阵列的运动车辆航向估计算法

现代电子技术 2024年第19期47卷 181-186页

作者：曹涵凯刘华巍王超懿中国科学院上海微系统与信息技术研究所上海200050 中国科学院大学北京100049

野外监控传感器网络通常会利用多个节点的信息来估计运动目标的航向。若单个传感器节点能够实现对运动目标航向的估计,将有效降低传感器网络的通信开销,并提高信息融合效率。在此背景下,文中提出一种适用于单体传感器节点的运动车辆目... 详细信息

野外监控传感器网络通常会利用多个节点的信息来估计运动目标的航向。若单个传感器节点能够实现对运动目标航向的估计,将有效降低传感器网络的通信开销,并提高信息融合效率。在此背景下,文中提出一种适用于单体传感器节点的运动车辆目标航向角估计方法。该算法利用了节点内置的声阵列和电子罗盘数据,并针对野外环境中存在的风噪声和突发干扰进行了相应的处理策略设计。首先,对提出的航向估计算法理论进行了分析,将航向估计问题的主要研究内容细分为方位角估计问题和最邻近时刻估计问题;其次,对抗干扰方位角估计算法和最邻近时刻估计算法进行了介绍;最后为验证提出算法的效果,在采集的样本上进行了仿真实验,分别从风力大小和布设距离两个角度对实验结果进行分析,验证了所提算法对于野外环境下车辆目标航向角计算的有效性。

关键词：航向估计方位角估计概率数据关联多重信号分类声阵列电子罗盘

SOFC System Model and SOFC-CHP competitive Analysis

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SOFC System Model and SOFC-CHP Competitive Analysis

Typical OSS Implementation and Application

中国化学会第2.届学术年会

作者： Buyun Jing United technologies Research Center (China) ltd., {2., 2.12.4

＜正＞Improving the efficiency of energy conversion devices and reducing green house gas emission are two parallel approaches to improve global environment and *** with other new energy technologies,

关键词：

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ZTE communications 2006年第1期4卷 6-10页

作者： Peng Chaobao1 Chen Yi2.Wu Jieru1 (1.Guoxin Lucent technologies, shanghai 2.012., China 2. Lucent China, Beijing 100738,China)

The continuous changes of clients' demands, operators' organizational structures and software implementation technologies make it difficult to form a steady Operations Support System (OSS). Therefore, it is important to find relatively steady factors for an OSS. The Next Generation Operations System and Software (NGOSS) program of TeleManagement Forum (TMF) deeply studied the regular factors, and the core concepts, methodology and repository of NGOSS reflect the study achievements. This paper uses the implementation of order management and service provisioning system in the OSS to discusses how to develop an OSS by the NGOSS concepts and tools. It also points out that the implementation of such an OSS should take the characteristics of telecom operator products, services and resources, and specific software implementation technologies into account.

关键词： OSS SID In eTOM Figure BSS

热处理对激光熔覆GX4CrNi13-4显微组织和力学性能的影响

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核技术 2024年第6期47卷 99-109页

作者：何凌欢李家民张华炜侯娟田馨妮黄爱军上海理工大学材料与化学学院上海200082 蒙纳士大学增材制造中心澳大利亚诺丁山3168 蒙纳士大学材料科学与工程系澳大利亚克莱顿3800 苏州工业园区蒙纳士科技研究院苏州215004

激光熔覆凭借低成本、高效率被激光再制造领域重点关注,激光熔覆制造的GX4CrNi13-4马氏体不锈钢是一种核电站中应用广泛的结构材料。为改善激光熔覆制件低塑性问题,需进行热处理组织结构调控,改善其力学性能。采用激光熔覆技术制备了GX4... 详细信息

激光熔覆凭借低成本、高效率被激光再制造领域重点关注,激光熔覆制造的GX4CrNi13-4马氏体不锈钢是一种核电站中应用广泛的结构材料。为改善激光熔覆制件低塑性问题,需进行热处理组织结构调控,改善其力学性能。采用激光熔覆技术制备了GX4CrNi13-4不锈钢样品,对其热处理组织开展调控研究。首先通过热膨胀试验推导出该合金的奥氏体相变开始温度为62.℃,作为热处理工艺开发的基准参考温度。分别制定了固溶时效(1050℃保温1 h+550℃保温4 h,简称固溶时效处理)和单时效(62.℃保温2.h,简称单时效处理)两种热处理工艺,对比研究了热处理对覆层金属显微组织和力学性能的影响作用。然后采用X射线衍射仪、光学显微镜、扫描电子显微镜、透射电子显微镜对热处理后的显微组织结构和物相分布等进行表征,并对热处理前后的样品进行室温拉伸性能测试。结果表明:激光熔覆GX4CrNi13-4马氏体不锈钢沉积态样品基体组织主要为马氏体/铁素体双相组织,铁素体相呈连续网状结构,沿马氏体晶界析出,此外还存在少量残余奥氏体。经固溶时效热处理后,基体仍主要由马氏体和铁素体组成,但连续网状铁素体发生分解,且出现大量微米级马氏体晶内析出物,这导致材料塑性略有提升,但强度显著下降。对覆层样品进行单时效热处理,由于温度处于奥氏体相转变临界温度,样品中产生了逆变奥氏体相,该相在拉伸过程中引发相变诱发塑性(Transformation Induced Plasticity,TRIP)效应。此外,单时效处理后沿马氏体析出的网状铁素体进一步得到分解,呈离散分布。TRIP效应和铁素体分解的共同作用下,有效改善了激光熔覆GX4CrNi13-4不锈钢的塑性同时使得强度被较好地保持。激光熔覆工艺在修复和再制造领域具有广泛的应用前景,但熔覆过程的高冷却速度、复杂的热循环对材料的组织结构产生影响,使得修复件往往具有高强度但塑韧性不足。开展合适的热处理组织性能调控是改善材料综合力学性能的有效手段,在激光熔覆GX4CrNi13-4不锈钢的热处理工艺研究中,选择奥氏体相变温度作为时效温度,利用逆变奥氏体TRIP效应和网状铁素体分解的联合作用,获得强度-塑性匹配的良好力学性能。

关键词：马氏体不锈钢激光熔覆逆变奥氏体热处理增韧热膨胀系数奥氏体转变温度

Practical benefits and considerations in migrating to 3G

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Practical benefits and considerations in migrating to 3G

P2. traffic optimization

第五届中国（北京）IMT-2.00移动通信国际论坛

作者： Tan Zhu Director of 3G Product Line huawei technologies {2.

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Science China(Information Sciences) 2012年第7期55卷 1475-1492页

作者： ZHANG GuoQiang 1,2.,TANG MingDong 3 ,CHENG SuQi 2.4 ,ZHANG GuoQing 2.,SONG HaiBin 5 ,CAO JiGuang 6 & YANG Jing 7 1 School of computer Science and Technology,Nanjing Normal University,Nanjing 2.0046,China 2.Institute of computing Technology,Chinese Academy of Sciences,Beijing 100190,China 3 School of computer Science and Engineering,Hunan University of Science and Technology,Xiangtan 4112.1,China 4 Graduate University of Chinese Academy of Sciences,Beijing 100190,China 5 Nanjing R&D Center,huawei technologies,Nanjing 2.0012.China 6 China Academy of Telecommunication Research of MIIT,Beijing 100191,China 7 China Mobile Research Institute,Beijing 100053,China School of computer Science and Technology Nanjing Normal University Nanjing China Institute of computing Technology Chinese Academy of Sciences Beijing China School of computer Science and Engineering Hunan University of Science and Technology Xiangtan China Graduate University of Chinese Academy of Sciences Beijing China Nanjing R&D Center Huawei Technologies Nanjing China China Academy of Telecommunication Research of MIIT Beijing China China Mobile Research Institute Beijing China

Peer-to-peer (P2.) based content distribution systems have emerged as the main form for content distribution on the Internet,which can greatly reduce the distribution cost of content providers and improve the overall system ***,the mismatch between the overlay and underlay networks causes large volume of redundant traffic,which intensifies the tension between P2. content providers and ***,how to efficiently use network resources to reduce the traffic burden on the ISPs is crucial for the sustainable development of P2. *** paper surveys the state-of-art P2. traffic optimization technologies from three perspectives:P2. cache,locality-awareness and data *** details,comparison between these technologies and their applicabilities are presented,followed by a discussion of the issues that remain to be addressed and the direction of future content distribution research.

关键词： P2. traffic localization P2. traffic optimization P2. cache locality-awareness network coding content-centric network

Research and application of flood damage evaluation information system

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中国有色金属学会会刊：英文版 2005年第S1期15卷 204-207页

作者： SHI Jin-feng~1, WU Zhi-zhou~2. SONG Wei-dong~1 (1. Liaoning Technical University, Fuxin 12.000, China 2. Tongji University, shanghai 2.0092. China) Liaoning Tech Univ Fuxing 123000 Peoples R China Tongji Univ Shanghai 200092 Peoples R China

The fast evaluation method of flood damages was explored with the combination of high technologies, such as remote sensing (RS) and geographic information system (GIS), namely the land classification and extraction of flood areas were accomplished in RS image processing software, ENVI, the flood damages information system, digital terrain model and flood damages evaluation information system were developed on GIS platform GeoMedia. The problem of the combination of multi-source data was addressed, furthermore, the problems of how to build the flood damages evaluation model and the inundating elevation model were deeply probed, the calculating formulas were also given. Case study result shows that the evaluation models are correct and data are reliable, we can use it to evaluate real-time flood damages and provide evidences for decision-making of leaders, moreover, it is of great instructive significance to the research of flood damages evaluation theories.

关键词： flood damages GIS remote sensing digital terrain model evaluation

A Hybrid GA-based Scheduling Method for Static Segment in FlexRay Systems

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A Hybrid GA-based Scheduling Method for Static Segment in Fl...

基于CSO-AUKF的锂电池SOC估算方法

2.10 Chinese control and Decision conference

作者： Shan Ding~1,Xiaona Yin~2.Hongming Xu~1,Shi Zhang~1 1.college of Information Science and Engineering,Northeastern University,Shenyang 110004 2.huawei {2. co.,ltd,Beijing 100085,China

＜正＞FlexRay provides a communication infrastructure for future generation high-speed control applications in vehicle such as advanced powertrain,chassis,and by-wire *** FlexRay,the static segment is based on Time Division Multiple Access（TDMA） to achieve distributed control ***,scheduling of the static segment is critical for an efficient FlexRay-based system *** this paper,the bin-packing algorithm and the hybrid genetic algorithm basing on bin-packing algorithm are *** have computed the response times of all the tasks and messages in the system so that the message can be transmitted successfully before the *** the finally,we compare bin-packing algorithm, genetic algorithm and hybrid genetic algorithm to verify the validity of the hybrid genetic algorithm through a test of Automotive Safety System.

关键词： FlexRay systems Hybrid genetic algorithm Real-timing scheduling

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重庆交通大学学报（自然科学版） 2024年第9期43卷 118-126页

作者：吴华伟洪强陈运星马毓博湖北文理学院湖北隆中实验室湖北襄阳441053 湖北文理学院纯电动汽车动力系统设计与测试湖北省重点实验室湖北襄阳441053

电池荷电状态(SOC)估算是电池管理系统(BMS)的关键技术之一。针对锂电池提出了一种基于猫群(CSO)算法和自适应无迹卡尔曼滤波(AUKF)算法相结合的电池SOC估算方法;建立了基于二阶RC等效电路模型的锂电池状态方程,采用CSO算法提高电池辨... 详细信息

电池荷电状态(SOC)估算是电池管理系统(BMS)的关键技术之一。针对锂电池提出了一种基于猫群(CSO)算法和自适应无迹卡尔曼滤波(AUKF)算法相结合的电池SOC估算方法;建立了基于二阶RC等效电路模型的锂电池状态方程,采用CSO算法提高电池辨识精度,联合AUKF算法对SOC进行估算;基于混合脉冲功率测试工况(HPPC)和间歇恒流放电工况下的数据对该方法有效性进行了验证。研究结果表明:基于CSO-AUKF估算,SOC最大误差小于1.64%,估算精度及稳定性均好于遗传算法。

关键词：车辆工程锂电池汽车荷电状态(SOC) 猫群(CSO)算法自适应无迹卡尔曼滤波(AUKF)算法