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Swarm intention identification via dynamic distribution probability image

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Chinese Journal of Aeronautics 2024年第10期37卷 380-392页

作者： Yinhan wang Jiang wang Shaoming HE Fei wang Qi wang School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China

In the realm of decision-making for defense and security applications,it is paramount to swiftly and accurately identify the intentions of incoming *** identification methods predominantly focus on single-target applications and overlook the perturbations introduced by measurement *** this study,we propose a novel concept:the Dynamic Distribution Probability(DDP)image,which is constructed using the estimated state and its covariance *** grayscale pixel value within the image signifies the probability of the presence of the agent within the *** proposed identification scheme integrates the use of Extended Kalman Filter(EKF),Convolutional Neural Network(CNN),Back Propagation(BP)network,and Gated Recurrent Unit(GRU)***,the DDP image is processed through a CNN to distill the formation characteristics,and the estimated swarm state from EKF is inputted into a BP network to deduce the kinematic *** outputs from both networks are summed and subsequently channeled into a GRU network to capture temporal *** numerical simulations and flight experiments are presented to demonstrate the robust anti-noise capability of the proposed scheme compared with conventional methods,as well as its superior training efficiency.

关键词： Intention Identification Kalman filters Convolutional neural networks Swarm intelligence

特大城市主城区通风廊道规划控制研究——以天津市为例

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建筑科学 2019年第6期35卷 91-97,107页

作者：邹哲康健周志宇郭军王汉旗天津市城市规划设计研究院天津300201 天津大学天津300072 河北工业大学天津300401 天津市气候中心天津300074

为分析特大城市主城区构建通风廊道的必要性和可行性,本文以天津为例,综合分析了城市热岛效应、风环境、下垫面状况及其相互关系,并将研究结果用于通风廊道的构建中。结果表明:天津中心城区存在热岛效应,其中1981~2010年的热岛强度在0.4... 详细信息

为分析特大城市主城区构建通风廊道的必要性和可行性,本文以天津为例,综合分析了城市热岛效应、风环境、下垫面状况及其相互关系,并将研究结果用于通风廊道的构建中。结果表明:天津中心城区存在热岛效应,其中1981~2010年的热岛强度在0.4~1.2℃之间,且以每10年0.13℃的倾向率增加,对2013年夏季和冬季气温空间分布分析发现,夜间气温从城市中心向郊区呈同心圆状递减,昼间气温空间差异较小。对风环境分析发现,1981~2010年的城郊风速差为0.7 m/s,且市区以每10年0.28 m/s的倾向率下降,而郊区仅为0.12 m/s,对2013年1月和7月平均风速空间分布分析发现,这两个季节风速都有从城市中心向郊区递减的趋势。对风速与热岛强度关系分析发现,随城区风速增加,热岛强度有减小趋势。最后,基于地表温度、风环境状况及下垫面通风潜力提出天津主城区三级通风廊道的规划建议及管控措施。

关键词：特大城市城市热岛通风廊道前面积指数天津

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基于瓶颈模型的随机需求下出行选择行为研究

武汉理工大学学报（交通科学与工程版） 2016年第5期40卷 907-912页

作者：王韩麒陈红冯微宋占国刘玮蔚长安大学公路学院西安710064

为准确描述通勤者在随机网络下的出行选择行为,将瓶颈模型拓展为2条平行道路,推导了不同道路条件下的行程时间函数,在通行能力退化及出行需求波动的条件下分析通勤者的出行选择行为.结果显示,通勤者一般会选择在准时上班之前的高峰期集... 详细信息

为准确描述通勤者在随机网络下的出行选择行为,将瓶颈模型拓展为2条平行道路,推导了不同道路条件下的行程时间函数,在通行能力退化及出行需求波动的条件下分析通勤者的出行选择行为.结果显示,通勤者一般会选择在准时上班之前的高峰期集中出行,设有公交专用道的公路小汽车出行比重减小,高峰期持续时间更长,出行分布更加分散.随着退化程度和波动程度的加剧,出行比值逐渐增大,出行者更倾向于选择公共汽车出行.

关键词：交通工程瓶颈模型随机需求随机退化公交专用道

核壳型Fe_3O_4/Au粒子的制备及其在表面等离子体子共振传感器中的应用

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化学学报 2010年第3期68卷 263-268页

作者：王健王丽英孙颖朱晓楠徐昊妍毕宁张寒琦曹彦波王兴华宋大千吉林大学化学学院长春130012

合成了核壳型Fe3O4/Au复合粒子,并对其形貌、光学性质进行了表征.通过外加磁场将Fe3O4/Au复合粒子与兔抗人IgG的偶联体固定于表面等离子体子共振(SPR)传感器的金基底膜上,形成了Fe3O4/Au/抗IgG敏感膜.与传统的通过巯基丙酸连接蛋白的方... 详细信息

合成了核壳型Fe3O4/Au复合粒子,并对其形貌、光学性质进行了表征.通过外加磁场将Fe3O4/Au复合粒子与兔抗人IgG的偶联体固定于表面等离子体子共振(SPR)传感器的金基底膜上,形成了Fe3O4/Au/抗IgG敏感膜.与传统的通过巯基丙酸连接蛋白的方式相比,磁场作用固定的Fe3O4/Au/抗IgG敏感膜制备简单,易洗脱,具有良好的再生性,且在一定程度上提高了传感器的灵敏度.并对人IgG进行了测定,结果表明,传感器对于浓度范围在1.25～20.00μg·mL-1的人IgG有良好的信号响应.

关键词： Fe3O4/Au复合粒子表面等离子体子共振(SPR) 人IgG

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天津市城市交通噪声分析与优化策略研究

山西建筑 2021年第14期47卷 11-13页

作者：周志宇王汉旗河北工业大学建筑与艺术设计学院天津300132 河北省健康人居环境重点实验室天津300132 天津市城市规划设计研究总院有限公司天津300000

随着经济社会的发展,城市声环境受到广泛关注,选择天津市中心城区为研究对象,通过实测发现外环路声压级最高,其次是快速路,城市主干道的交通噪声相对较低,交通高峰和非高峰时段3条道路的声压级均超过区域环境噪声控制标准。为优化城市... 详细信息

随着经济社会的发展,城市声环境受到广泛关注,选择天津市中心城区为研究对象,通过实测发现外环路声压级最高,其次是快速路,城市主干道的交通噪声相对较低,交通高峰和非高峰时段3条道路的声压级均超过区域环境噪声控制标准。为优化城市交通噪声,提出优化道路沿线土地利用和建筑布局、优化交通组织及道路材料、声景观设计等策略,通过该研究可为天津城市声环境改善提供数据和策略支持,可为其他城市的声环境改善提供借鉴。

关键词：交通噪声城市规划天津市

The reformation of catalyst:From a trial-and-error synthesis to rational design

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Nano Research 2024年第4期17卷 3261-3301页

作者： Ligang wang Jiabin Wu Shunwu wang Huan Liu Yao wang Dingsheng wang Department of Chemistry Tsinghua UniversityBeijing 100084China

The appropriate catalysts can accelerate the reaction rate and effectively boost the efficient conversion of various molecules,which is of great importance in the study of chemistry,chemical industry,energy,materials and environmental ***,efficient,environmentally friendly,and easy to operate synthesis methods have been used to prepare various types of *** previous studies have reported the synthesis and characterization of the aforementioned catalysts,more still remain in trial and error methods,without in-depth consideration and improvement of traditional synthesis ***,we comprehensively summarize and compare the preparation methods of the trial-and-error synthesis strategy,structure–activity relationships and density functional theory(DFT)guided catalysts rational design for nanomaterials and atomically dispersed *** also discuss in detail the utilization of the nanomaterials and single atom catalysts for converting small molecules(H_(2)O,O_(2),CO_(2),N_(2),etc.)into value-added products driven by electrocatalysis,photocatalysis,and ***,the challenges and outlooks of mass preparation and production of efficient and green catalysts through conventional trial and error synthesis and DFT theory are featured in accordance with its current development.

关键词： trial-and-error synthesis structure–activity relationships density functional theory(DFT)guidance nanomaterials atomically dispersed catalysts

Numerical Analysis of PRISM-PY Calculations for Hard-and Soft-Core Generic Polymer Models

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Chinese Journal of Polymer Science 2024年第4期42卷 532-543页

作者： Qiang wang Department of Chemical and Biological Engineering Colorado State University1370 Campus DeliveryFort CollinsCO80523-1370USA

Generic polymer models capturing the chain connectivity and excluded-volume interactions between polymer segments can be classified, according to whether or not the 3D integral of the latter diverges, into hard- and soft-core models. Taking homogeneous systems of compressible homopolymer melts (or equivalently homopolymer solutions in an implicit, good solvent) in the continuum as an example, we recently compared the correlation effects on the structural and thermodynamic properties of the hard- and soft-core models given by the polymer reference interaction site model (PRISM) theory with the Percus-Yevick (PY) closure (Polymers 2023, 15, 1180). Here we analyzed in detail the numerical errors and behavior of the interchain pair correlation functions (PCFs) given by the PRISM-PY calculations of these models using an efficient numerical approach that we proposed. Our numerical approach has the least number of independent variables to be iteratively solved, analytically treats the discontinuities caused by the non-bonded pair potential (such as that of the hard spheres) and takes only the inverse Fourier transform of the interchain indirect PCF between polymer segments (which is continuous and decays towards 0 with increasing wavenumber much faster than both the interchain direct and total PCFs), and is essential for us to accurately solve the PRISM-PY theory for chain length N as large as 106. To capture the correlation-hole effect, the real-space cut-off in the PRISM calculations should be proportional to the square root of N.

关键词： Generic polymer models Soft potentials Polymer reference interaction site model theory

Linear-Quadratic Pareto Cooperative Game for Mean-Field Backward Stochastic System

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Journal of Systems Science & Complexity 2024年第3期37卷 947-964页

作者： wang Yu School of Control Science and Engineering Shandong UniversityJinan 250061China

This paper focuses on a Pareto cooperative differential game with a linear mean-field backward stochastic system and a quadratic form cost functional. Based on a weighted sum optimality method, the Pareto game is equivalently converted to an optimal control problem. In the first place,the feedback form of Pareto optimal strategy is derived by virtue of decoupling technology, which is represented by four Riccati equations, a mean-field forward stochastic differential equation(MF-FSDE),and a mean-field backward stochastic differential equation(MF-BSDE). In addition, the corresponding Pareto optimal solution is further obtained. Finally, the author solves a problem in mathematical finance to illustrate the application of the theoretical results.

关键词： Backward stochastic differential equation linear-quadratic control mean-field Pareto optimality

A multi-source information fusion layer counting method for penetration fuze based on TCN-LSTM

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Defence Technology（防务技术） 2024年第3期33卷 463-474页

作者： Yili wang Changsheng Li Xiaofeng wang Nanjing University of Science and Technology Nanjing 210094JiangsuChina State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

When employing penetration ammunition to strike multi-story buildings,the detection methods using acceleration sensors suffer from signal aliasing,while magnetic detection methods are susceptible to interference from ferromagnetic materials,thereby posing challenges in accurately determining the number of *** address this issue,this research proposes a layer counting method for penetration fuze that incorporates multi-source information fusion,utilizing both the temporal convolutional network(TCN)and the long short-term memory(LSTM)recurrent *** leveraging the strengths of these two network structures,the method extracts temporal and high-dimensional features from the multi-source physical field during the penetration process,establishing a relationship between the multi-source physical field and the distance between the fuze and the target plate.A simulation model is developed to simulate the overload and magnetic field of a projectile penetrating multiple layers of target plates,capturing the multi-source physical field signals and their patterns during the penetration *** analysis reveals that the proposed multi-source fusion layer counting method reduces errors by 60% and 50% compared to single overload layer counting and single magnetic anomaly signal layer counting,*** model's predictive performance is evaluated under various operating conditions,including different ratios of added noise to random sample positions,penetration speeds,and spacing between target *** maximum errors in fuze penetration time predicted by the three modes are 0.08 ms,0.12 ms,and 0.16 ms,respectively,confirming the robustness of the proposed ***,the model's predictions indicate that the fitting degree for large interlayer spacings is superior to that for small interlayer spacings due to the influence of stress waves.

关键词： Penetration fuze Temporal convolutional network(TCN) Long short-term memory(LSTM) Layer counting Multi-source fusion