检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

基于非质点模型的纯方位解距离方法

计算机与数字工程 2013年第7期41卷 1070-1073页

作者：石杰戚国庆盛安冬南京理工大学自动化学院南京210094

目标距离是战场进行作战决策和武器使用时考虑的一个重要参数。在传统的二维被动跟踪系统基础上,将目标建模为椭圆刚体。论文借鉴修正极坐标(MPC)的思想,利用刚体目标的尺寸参数,建立目标的状态模型和测量模型。采用无迹卡尔曼滤波(UKF... 详细信息

目标距离是战场进行作战决策和武器使用时考虑的一个重要参数。在传统的二维被动跟踪系统基础上,将目标建模为椭圆刚体。论文借鉴修正极坐标(MPC)的思想,利用刚体目标的尺寸参数,建立目标的状态模型和测量模型。采用无迹卡尔曼滤波(UKF)算法进行解距离,为工程实现提供了可能性,并从不同的初始条件下分析了距离误差。Monte-Carlo仿真表明:在新的状态模型下利用UKF算法进行解距离,可以达到较高的精度。其中传感器与目标的相对速度和刚体目标的尺寸对距离解的精度影响较大。

关键词：非质点纯方位非线性滤波器解距离

Cramer-Rao Lower Bounds for Bearings-Only Maneuvering Target Tracking with Incomplete Measurements

在线全文

学校读者我要写书评

暂无评论

Cramer-Rao Lower Bounds for Bearings-Only Maneuvering Target...

The Study on Satisfactory Bias-allowable Estimator of Discrete System

2009中国控制与决策会议

作者： Xu Zhigang~(1,2),sheng andong~1,Li Yinya~1 1.School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China 2.School of Sciences,Huaihai Institute of Technology,Lianyungang 222005,China

The theoretical Cramer-Rao lower bound(CRLB) for bearings-only maneuvering target tracking is derived in the case where the observation measurements are lost in a random *** binary variables are introduced to model two events respectively,one which the target maneuvers or not and another that the target is detected or *** corresponding recursive formula for theoretical CRLB is then derived based on the sequential version of the CRLB for general nonlinear *** theoretical formula suffers from heavy calculation load of the Fisher information matrix (FIM) while the constant probability of detection is less than *** approximation of the theoretical bound is proposed. In addition,a detection reduction factor bound is presented and proved to be less than the theoretical *** results are illustrated with a numerical example.

关键词： Cramer-Rao lower bound Maneuvering target tracking Incomplete measurements Bearings-only tracking

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

The Study on Satisfactory Bias-allowable Estimator of Discre...

2009中国控制与决策会议

作者： Teng Kenan~(1,2),Qi Guoqing~2,sheng andong~2 1.Scientific Researching Department,Yantai Naval Aeronautical Engineering Institute,Yantai 264001 2.Automatic School,Nanjing University of Science & Technology,Nanjing 210094

＜正＞Aiming at the target tracking problem in fire control system,the satisfactory discrete-time bias-allowable estimator is investigated in this *** fire control system,the smoothness of forecasting target future positions is an important factor that affects shooting *** lower order system model to estimate target state is a common method of smoothly forecasting the future position,which could produce system bias when the target is suddenly *** important index in constraining system error called steady error coefficient is introduced into the performance index set with error variance upper bound and area pole *** the maneuvering intensity of target is finite,an iterative algorithm in terms of linear matrix inequalities（LMIs） is proposed to solve the satisfactory bias-allowable estimation *** proposed bias-allowable estimator can ensure the accuracy and smoothness of the estimation output by using a lower order system *** an example is presented to demonstrate the obtained results.

关键词： Target Tracking Bias-allowable Estimation Linear Matrix Inqeuality Steady Error Coefficient Multi Indices Constraint

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于压缩传感的多尺度传感器融合

计算机与数字工程 2013年第5期41卷 726-728,745页

作者：陈素娟戚国庆盛安冬南京理工大学自动化系南京210094

针对传统采样理论需要采集大量观测数据所带来的存储、传输以及经济方面的压力,提出了一种基于压缩传感理论的多尺度传感器融合方法。分析了基于压缩传感理论的重构算法的设计问题,采用曲线拟合方法对多尺度的传感器的时间配准。仿真结... 详细信息

针对传统采样理论需要采集大量观测数据所带来的存储、传输以及经济方面的压力,提出了一种基于压缩传感理论的多尺度传感器融合方法。分析了基于压缩传感理论的重构算法的设计问题,采用曲线拟合方法对多尺度的传感器的时间配准。仿真结果表明,基于正交匹配追踪算法几乎可以完全重构原始信号。与传统采样算法相比,虽然精度没有传统的方法高,但是在误差允许范围内,采集的数据少,所需时间少,减少了数据的传输和存储成本。

关键词：压缩传感重构算法曲线拟合多尺度传感器

在线全文

学校读者我要写书评

暂无评论

基于一致性的分布式多站纯方位目标跟踪算法

计算机与数字工程 2013年第6期41卷 904-907页

作者：王长城陈烨戚国庆盛安冬南京理工大学自动化学院南京210094

针对多站纯方位目标跟踪与定位问题,给出了一种基于一致性的分布式无迹卡尔曼滤波算法(CDUKF,Consensus-based Dis-tributed Unscented Kalman Filter)。各观测站利用本站和邻接站点信息获得目标状态的局部估计,其次利用联邦滤波器的加... 详细信息

针对多站纯方位目标跟踪与定位问题,给出了一种基于一致性的分布式无迹卡尔曼滤波算法(CDUKF,Consensus-based Dis-tributed Unscented Kalman Filter)。各观测站利用本站和邻接站点信息获得目标状态的局部估计,其次利用联邦滤波器的加权原则和一致性算法,通过相邻观测站之间的局部信息交换获得目标状态的更高精度估计,并提出通过利用各站历史状态信息以改善算法的收敛速度。仿真结果表明论文所提出的算法能够实现多站纯方位被动跟踪,估计结果可接近传统集中式融合的跟踪精度。

关键词：一致性算法纯方位无迹卡尔曼滤波目标跟踪

基于PSO的工业机器人时间-脉动最优轨迹规划

在线全文

学校读者我要写书评

暂无评论

计算机测量与控制 2017年第1期25卷 158-162页

作者：沈悦李银伢戚国庆盛安冬南京理工大学自动化学院江苏210094

为提高工业机器人的工作效率,并且保持机器人关节平稳运动,提出一种基于粒子群优化算法的时间-脉动最优轨迹规划方案;通过权重法将多目标优化转化为单目标优化,再运用粒子群优化算法得到时间-脉动最优的运动轨迹;轨迹规划中,采用了关节... 详细信息

为提高工业机器人的工作效率,并且保持机器人关节平稳运动,提出一种基于粒子群优化算法的时间-脉动最优轨迹规划方案;通过权重法将多目标优化转化为单目标优化,再运用粒子群优化算法得到时间-脉动最优的运动轨迹;轨迹规划中,采用了关节空间五次非均匀B样条插值法,以确保脉动曲线的连续性;最后以GRB4016工业机器人为研究对象进行仿真实验,结果表明,该方案可以得到较理想的运动轨迹,并验证了方案的有效性。

关键词： B样条曲线粒子群优化时间-脉动最优轨迹规划

Overview of in-situ oxygen production technologies for lunar resources

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 233-255页

作者： Youpeng Xu sheng Pang Liangwei Cong Guoyu Qian Dong Wang Laishi Li Yusheng Wu Zhi Wang College of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China CAS Key Laboratory of Green Process and Engineering National Engineering Research Center for Green Recycling of Strategic Metal ResourcesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

The rich resources and unique environment of the Moon make it an ideal location for human expansion and the utilization of extraterrestrial ***,crucial for supporting human life on the Moon,can be extracted from lunar regolith,which is highly rich in oxygen and contains polymetallic *** oxygen and metal extraction can be achieved using existing metallurgical ***,the ample reserves of water ice on the Moon offer another means for oxygen *** paper offers a detailed overview of the leading technologies for achieving oxygen production on the Moon,drawing from an analysis of lunar resources and environmental *** delves into the principles,processes,advantages,and drawbacks of water-ice electrolysis,two-step oxygen production from lunar regolith,and one-step oxygen production from lunar *** two-step methods involve hydrogen reduction,carbothermal reduction,and hydrometallurgy,while the one-step methods encompass fluorination/chlorination,high-temperature decomposition,molten salt electrolysis,and molten regolith electrolysis(MOE).Following a thorough comparison of raw materials,equipment,technology,and economic viability,MOE is identified as the most promising approach for future in-situ oxygen production on the *** the corrosion characteristics of molten lunar regolith at high temperatures,along with the Moon's low-gravity environment,the development of inexpensive and stable inert anodes and electrolysis devices that can easily collect oxygen is critical for promoting MOE technology on the *** review significantly contributes to our understanding of in-situ oxygen production technologies on the Moon and supports upcoming lunar exploration initiatives.

关键词： lunar resources in-situ oxygen production space metallurgy molten lunar regolith electrolysis

Challenges in the management of visual and tactile hallucinations in elderly people

在线全文

学校读者我要写书评

暂无评论

World Journal of Psychiatry 2025年第1期15卷 185-188页

作者： Si-sheng Huang Division of Geriatric Psychiatry Department of PsychiatryChanghua Christian HospitalChanghua 500Taiwan Department of Post-Baccalaureate Medicine College of MedicineNational Chung Hsing UniversityTaichung 402Taiwan

This letter provides a concise review of the pertinent literature on visual and tactile hallucinations in elderly *** discussion addresses differential diagnoses and potential underlying mechanisms,as well as the psychopathology associated with tactile hallucinations,and emphasizes the necessity for invest-igation into the possibility of coexisting delusional infestation(parasitosis).These symptoms frequently manifest in patients with primary psychotic disorders,organic mental disorders,and substance use *** proposed pathophy-siological mechanisms may involve dopaminergic imbalances and dysfunction of the striatal dopamine transporter.

关键词： Delusional infestation Dementia Haptic hallucination Scratching behavior Tactile hallucination Visual hallucination Alzheimer’s disease

Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing Wang Wei Pi sheng Hu Haifeng Bao Na Yao Wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer