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CNet: Excavating Cross-Modal Context- and Content-Complementarity for RGB-T Semantic Segmentation

IEEE Transactions on Circuits and systems for Video Technology 2025年第2期35卷 1347-1361页

作者： Zhao, Shenlu Li, Jingyi Zhang, Qiang Xidian University State Key Lab. of Electromechanical Intgd. Manufacturing of High-Performance Electronic Equipments The Center for Complex Systems School of Mechano-Electronic Engineering Shaanxi Xi'an710071 China

The complementary properties exhibited upon RGB-T data involve context complementarity as well as content complementarity. During cross-modal feature fusion, most existing RGB-T semantic segmentation methods are dedicated to highlighting the exploitation of content-complementary information. Unfortunately, these methods usually overlook the excavation of cross-modal context-complementary information (i.e., the contextual dependencies among different regions that only exist in one certain modality data) or try to exploit such cross-modal context-complementary information in an implicit way, yielding fragmentary semantic segmentation results. To remedy this problem, in this paper, a novel Cross-modal Context- and Content-Complementarity Network ( C4 Net) is presented for RGB-T semantic segmentation, in which both the cross-modal context-complementary information and the cross-modal content-complementary information are fully excavated and exploited during cross-modal feature fusion. Specifically, a Context-Complementary Information Aggregation (CxCIA) module is carefully designed, in which the cross-modal context-complementary information is explicitly excavated by measuring the discrepancies between contextual dependencies from different modality data. Then, such cross-modal context-complementary information is further exploited to enhance the original RGB and thermal contextual dependencies for boosting the integrity of objects in the fused features. In the meantime, a Content-Complementary Information Aggregation (CnCIA) module is presented, which highlights the utilization of cross-modal content-complementary information from a multi-scale perspective. Furthermore, an MLP-based Multi-level Feature Interaction (MFI) decoder is presented, in which the semantic gaps among different levels of fused features are mitigated by establishing the interactions of multi-level fused features along spatial and channel dimensions. Comprehensive experimental results on several pu

关键词： Semantic Segmentation

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Design of large ring-column antenna satellite attitude-orbit integrated füll propulsion system

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Zhendong yu Chongji/Journal of Vibration and Shock 2025年第11期44卷 1-11页

作者： Wang, Shijie Sun, Minzhe Gao, Feng Ji, Yi Sun, Guanghui Dong, Fuxiang School of Astronautics Harbin Institute of Technology Harbin150001 China Frontier Science Center of Space Environment and Interaction of Matters Harbin150001 China State Key Lab for Modeling and Simulation of Complex Systems Harbin150001 China General Department of Communication and Navigation Satellite China Academy of Space Technology Beijing100094 China

As a key space structure in geostationary orbit, 100-meter level large ring-column antenna satellite is tasked with providing high-speed information transmission and stable communication Service in this orbit. This requires satellites having precise orbit maintenance and attitude control capabilities. Due to such satellites typically having larger masses and special structural designs, here, the high-precision orbit prediction algorithm was used to finely model and analyze effects of key space environmental factors of solar pressure, non-spherical perturbations and 3-body gravity on space Operation of such spacecrafts. Furthermore, referring to the design concept of formation-flying gravity field measurement satellites, a distributed füll thrust control strategy based on thruster layout optimization for such spacecrafts was proposed. Then, an improved explicit model predictive control algorithm was proposed based on Laguerre function to convert device capability limitations and Performance requirements into input-output constraints, combine multi-parameter programming, and realize attitude-orbit integrated control of such satellites. The simulation results showed that during stable Operation, position maintenance errors of such satellites can be controlled within a meter-level ränge, and attitude angle errors are better than 0. 03°;the computational efficiency of the proposed control algorithm is significantly higher than that of the Standard model predictive control algorithm and Laguerre function-based model predictive control algorithm;the hardware memory occupied is much lower than that of the explicit model predictive control *** theoretical analysis and numerical verification, it was shown that this study can provide an effective solving scheme for füll thruster integrated control of large ring-column antenna satellites in oomplex space environment using onboard Computers with limited Computing power. © 2025 Chinese Vibration Engineering Society.

关键词： Geostationary satellites

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Sensor planning method for visual tracking in 3D camera networks

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Journal of systems Engineering and Electronics 2014年第6期25卷 1107-1116页

作者： Anlong Ming Xin Chen School of Computer Science Beijing University of Posts and Telecommunications State Key Lab for Complex Systems Simulation

Most sensors or cameras discussed in the sensor network community are usually 3D homogeneous, even though their2 D coverage areas in the ground plane are heterogeneous. Meanwhile, observed objects of camera networks are usually simplified as 2D points in previous literature. However in actual application scenes, not only cameras are always heterogeneous with different height and action radiuses, but also the observed objects are with 3D features（i.e., height）. This paper presents a sensor planning formulation addressing the efficiency enhancement of visual tracking in 3D heterogeneous camera networks that track and detect people traversing a region. The problem of sensor planning consists of three issues：（i） how to model the 3D heterogeneous cameras;（ii） how to rank the visibility, which ensures that the object of interest is visible in a camera＇s field of view;（iii） how to reconfigure the 3D viewing orientations of the cameras. This paper studies the geometric properties of 3D heterogeneous camera networks and addresses an evaluation formulation to rank the visibility of observed objects. Then a sensor planning method is proposed to improve the efficiency of visual tracking. Finally, the numerical results show that the proposed method can improve the tracking performance of the system compared to the conventional strategies.

关键词： camera model sensor planning camera network visual tracking

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“FLUID ROLLER BEARING” EFFECT AND FLOW CONTROL

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Acta Mechanica Sinica 2003年第5期19卷 476-484页

作者：吴锤结解妍琼吴介之 State Key Lab. of Turbulence and Complex Systems Peking University Beijing 100871 China Research Center for Fluid Dynamics PLA University of Science and Technology Nanjing 211101 China State Key Lab. of Turbulence and Complex Systems Peking University Beijing 100871 China University of Tennessee Space Institute TN 37388 USA

Owing to the rapid development of smart materials, flow control by travelling waves (TW) produced on flexible skin is becoming a very promising new area of research. One of the most revolutionary concepts of using TW technique is to trap a row of controllab.e vortices over the body surface, which plays a role of "fluid roller bearing" (FRB) between the external flow and the solid wall. The FRB can replace the conventional boundary layer and hence remove the latter's various unfavorable effects. This paper reports our preliminary numerical study of the FRB effect on flow over several typical walls, especially an airfoil with FRB at the stall angle of attack, which has never been considered before. Significant improvement of aerodynamic performance on the FRB-airfoil is observed, which strongly suggests that the FRB effect may open a brand new avenue to the 21thCentury aerodynamics.

关键词： “Fluid Roller Bearing” effect flow control travelling wavy wall airfoil flow ALE method

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Description method of conceptual model based on the ontology

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Journal of Beijing Institute of Technology 2012年第4期21卷 510-517页

作者：陈欣段枫张英潮 School of Computer Science and Technology Beijing University of Posts and Communications State Key Lab for Complex Systems Simulation Military Representative Office in Beijing Area of PLA

The conceptual model is the first time abstraction ceptual model description method based on the UML and the of the real world. The traditional con- text usually has the semantic ambiguity problem. The formal description method lacks the mechanism of integrity and consistency check. Therefore both of them cannot support the simulation scenario description and the model compos- ability. A simulation conceptual description method based on ontology is put forward. According to the OWL language which was put forward by the W3C organization, a conceptual model description language is established. The OWL language semantic element in the description function in the mili- tary conceptual model is introduced. Then two layers of the military conceptual model framework are built up based on the general ontology and the domain ontology. In the general ontology, the class and property definition are given. While in the domain ontology, they are extended and a relat- ed example is given. The technique advantages of our method include the mechanism of conceptual model consistency and integrity check, the support of composable simulation models, and automatic creation of simulation scenario.

关键词： conceptual model ontology web ontology language (OWL) simulation scenario

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Domain ontology driven composable simulation framework

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Journal of Harbin Institute of Technology(New Series) 2012年第4期19卷 49-54页

The simulation composability is one of important development directions in simulation domain. The key issue is the semantic composability. Currently there is no feasible approach to realize the effective semantic representation and composition of simulation components. Based on domain knowledge and Web Ontology Language (OWL), this paper proposes a composable simulation framework, which includes conceptual model semantics, model components semantics, model framework semantics, and simulation scenario semantics. Additionally, all the semantics are utilized in the model components development process, the simulation system development process, and the simulation system execution process respectively. The consistency checking among those semantics is also proposed. The detailed mapping processes between different semantic models can help to build the domain ontology driven composable simulation system.

关键词： domain ontology composability simulation components conceptual model simulation scenario

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Stratagem-research (SR) methodology and the meta-synthetic integrated environment of SR

Stratagem-research (SR) methodology and the meta-synthetic i...

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20th IASTED International Conference on Modelling and simulation, MS 2009

作者： Ji-Cai, Wei Jing, Zhang Wei, Zhao Beijing Institute of System Engineer State Key Lab. for Complex Systems Simulation China Post Box. 970219 Beijing 100101 China

ISBN: (纸本)9780889867994

The strategic issue is looked on as the complex system in this paper. Firstly, the essential characteristics of stratagem research (SR) are discussed. Then the stratagem research methodology is brought forward and constructed. Finally, under the guidance of the combination of qualitative and quantitative methods, the meta-synthetic integrated environment of SR is designed, realized and applied to solve the stratagem research problem.

关键词： complex system Meta-synthetic integration Methodology Stratagem

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High level architecture evolved modular federation object model

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Journal of systems Engineering and Electronics 2009年第3期20卷 625-635页

作者： Wang Wenguang Xu Yongping Chen Xinx Chen Xin Li Qun Wang Weiping Coll. of Information System and Management National Univ. of Defense Technology Changsha 410073 P. R. China Beijing Key Lab. of Intelligent Telecommunications Software and Multimedia Beijing Univ. of Posts and Telecommunications Beijing 100876 P. R. China State Key Lab. for Complex Systems Simulation Beijing 100101 P. R. China

To improve the agility, dynamics, composability, reusability, and development efficiency restricted by monolithic federation object model （FOM）, a modular FOM is proposed by high level architecture （HLA） evolved product development group. This paper reviews the state-of-the-art of HLA evolved modular FOM. In particular, related concepts, the overall impact on HLA standards, extension principles, and merging processes are discussed. Also permitted and restricted combinations, and merging rules are provided, and the influence on HLA interface specification is given. The comparison between modular FOM and base object model （BOM） is performed to illustrate the importance of their combination. The applications of modular FOM are summarized. Finally, the significance to facilitate compoable simulation both in academia and practice is presented and future directions are pointed out.

关键词： model federation object model review modular federation object model base object model composability high level architecture evolved simulation.

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Chaos control and synchronization of dynamical model of happiness with fractional order

Chaos control and synchronization of dynamical model of happ...

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2009 4th IEEE Conference on Industrial Electronics and Applications, ICIEA 2009

作者： Song, Lei State Key Lab. for Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China

ISBN: (纸本)9781424428007

This paper examines fractional-order dynamical model of happiness. The dynamics of this system is studied numerically. The system displays many different dynamic behaviors, such as periodic motions, chaotic motions and divergence. It was found that chaos exists in the fractional-order system with order less than 3. In this study, the lowest order for this system to yield chaos is 2.97. The results are validated by the existence of a positive Lyapunov exponent. Moreover, chaos control and synchronization are also discussed here, which is a step into the research field of psychology on emotion control and synchronization by using fractional order models. © 2009 IEEE.

关键词： Synchronization

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Distributed adaptive attitude synchronization of multiple spacecraft

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Science China(Technological Sciences) 2011年第8期54卷 1992-1998页

作者： LI ZhongKui DUAN ZhiSheng School of Automation Beijing Institute of Technology Beijing 100081 China State Key Lab. for Turbulence and Complex Systems Department of Mechanics and Aerospace Engineering College of Engineering Peking University Beijing 100871 China

This paper addresses the distributed attitude synchronization problem of multiple spacecraft with unknown inertia matrices. Two distributed adaptive controllers are proposed for the cases with and without a virtual leader to which a time-varying reference attitude is assigned. The first controller achieves attitude synchronization for a group of spacecraft with a leaderless communication topology having a directed spanning tree. The second controller guarantees that all spacecraft track the reference attitude if the virtual leader has a directed path to all other spacecraft. simulation examples are presented to illustrate the effectiveness of the results.

关键词： attitude synchronization distributed control adaptive control multi-agent system

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