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中国电机工程学报 2014年第S1期34卷 136-141页

作者：李先春余江龙辽宁省先进煤焦化技术重点实验室(辽宁科技大学) 辽宁省鞍山市114051

利用水分再吸收实验装置测定了印尼褐煤在30℃和40℃下的等温脱附(吸附)曲线,研究粒径和干燥温度对褐煤吸湿特性的影响;利用多孔介质等温吸附热力学原理,计算得到了印尼褐煤的等温吸附热。结果表明:印尼褐煤等温吸湿曲线的形状是典型的... 详细信息

利用水分再吸收实验装置测定了印尼褐煤在30℃和40℃下的等温脱附(吸附)曲线,研究粒径和干燥温度对褐煤吸湿特性的影响;利用多孔介质等温吸附热力学原理,计算得到了印尼褐煤的等温吸附热。结果表明:印尼褐煤等温吸湿曲线的形状是典型的可冷凝蒸汽在孔隙物质中物理吸附的S型;干燥后的印尼褐煤平衡水分(equilibrium moisture content,EMC)与粒径无关,而与干燥温度有关,随着干燥温度的提高,平衡水分降低。印尼褐煤的等温吸附热随着平衡水分的增大而降低,当EMC<7%时,干燥煤的吸附热略高于水的蒸发潜热,可以推断水分子在干燥褐煤孔隙表面再吸附机理是水分子物理吸附在褐煤孔隙表面形成体相水和毛细水,没有与煤的表面官能团形成氢键。

关键词：印尼褐煤水分再吸收吸湿速率平衡水分吸附热

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The crucial role of PTS1 in the adaptive evolution of AGT subcellular localization among herbivorous mammals

The crucial role of PTS1 in the adaptive evolution of AGT su...

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第十六届全国野生动物生态与资源保护学术研讨会

作者： Chen Huang Bingjun Wang jianglong yu Huabin Zhao Department of Ecology College of Life Sciences Frontier Science Center for Immunology and Metabolism Wuhan University

The herbivorous diet in mammals is one of the diverse diets that emerged from their insectivorous mammal ancestors during evolution, promoting the emergence of new adaptive nutritional strategies in mammals. In order to investigate the adaptive evolution driven by diet in herbivorous mammals, we conducted a study on the subcellular localization of alanine: glyoxylate aminotransferase(AGT), which has the ability to target both mitochondria and peroxisome. We specifically examined the ability of N-terminal mitochondrial targeting sequence(MTS) and C-terminal peroxisomal targeting sequence(PTS1) that mediate the localization of AGT to these organelles. Through cell-based immunofluorescence assays, we observed higher efficiencies of AGT peroxisomal targeting in herbivores. We also found that peroxisomal targeting efficiencies of AGT without PTS1 exhibit varying degrees of decreases in different mammals. Additionally, our findings revealed the presence of numerous nonfunctional MTS and highly conserved PTS1 in herbivores and PTS1 is under strong purifying selection in 37 examined species. We observed a significant positive correlation between peroxisomal targeting efficiencies of AGT and proportions of plant tissue in mammalian diets, confirming the influence of dietary composition on AGT subcellular localization. Furthermore, our experimental results led us to explore the mechanisms underlying AGT subcellular localization, revealing that PTS1 has an ability to influence AGT localization regardless of the presence or absence of functional MTS, particularly in herbivores. This study highlighted the significant influence of PTS1 on the subcellular localization of AGT and contributes to our understanding of adaptive evolution in herbivorous mammals.

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Cooperative interception against highly maneuvering target with acceleration constraints for multiple heterogeneous missiles

Cooperative interception against highly maneuvering target w...

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第40届中国控制会议

作者： Wenlu Bai Ziyan Chen jianglong yu Xiwang Dong Hong Jiang School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University) Ministry of Education of ChinaChongqing University

The cooperative interception problem of multiple heterogeneous missiles with low maneuverability against highly maneuvering target is studied in this paper. Firstly, the reachable area of the missiles and the escape area of the target are analyzed. The form of the guidance law based on the coverage-based cooperative interception strategy and the standard ballistic design method is given. Secondly, the algorithm for realizing the coverage distribution of multiple heterogeneous missiles is proposed. The parameter design of the cooperative guidance law and the conditions that the initial position of the missiles and target need to meet are derived. Thirdly, the number of heterogeneous missiles required to complete the coverage is calculated by numerical solution. The initial position and the guidance law parameters of each missile are given. Finally, it is verified by simulation examples that multiple heterogeneous missiles with low maneuverability can achieve cooperative interception against highly maneuvering target through the reasonable configuration of the initial interception position and the reasonable design of the cooperative interception guidance law.

关键词： Heterogeneous missiles cooperative interception highly maneuvering target acceleration constraints

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Cooperative Guidance with Optimal Angle Constraints Based on Deep Neural Network

Cooperative Guidance with Optimal Angle Constraints Based on...

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第43届中国控制会议

作者： Changhai Wang Qingdong Li jianglong yu Xiwang Dong Zhang Ren School of Automation Science and Electrical Engineering Beihang University Institute of Artificial Intelligence Beihang University Institute of Unmanned System Beihang University

Cooperative guidance with optimal angle constraints based on deep neural network(DNN) is developed to address the problem of cooperative guidance of multiple missiles against maneuvering ***,Angle-constrained guidance(ACG)law based on sliding mode control is proposed,and the structure of cooperative guidance is ***,an optimal method of cooperative angles is *** neural network is applied to estimate optimal cooperative *** variables of network are normalized to reduce the range of variable values Thirdly,in the scene of 3 missiles against 1 target,cooperative angles are optimized and the network is *** is carried out to verify the performance of guidance law.

关键词： cooperative guidance angle constraint deep neural network optimal cooperative angles

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Weapon target assignment strategy for multi-missile cooperative guidance with auction algorithm

Weapon target assignment strategy for multi-missile cooperat...

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第40届中国控制会议

作者： Qingze Li Xiwang Dong Qingdong Li jianglong yu Zhang Ren School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University) Ministry of Education of ChinaChongqing University

This paper presents a weapon target assignment method to reduce maneuverability overload through redistribution for multi-missile cooperative attack. Firstly, a dynamic constrained model of multi-missile cooperative attack on multi-target is established. Secondly, in order to evaluate the missile’s cooperative attack performance better, a cooperative attack probability matrix considering the cooperative attack efficiency is constructed by taking the time-to-go and the line-of-sight rate as *** kinds of maneuvering overload results are compared to verify the effectiveness of redistribution, including unassigned process, primary target assignment and redistribution at the beginning of mid-to-terminal guidance handover. Then, an auction algorithm is used to solve the target assignment problem under multiple constraints. Finally, the simulation results show that the proposed algorithm is much less time-consuming than the existing intelligent optimization algorithms and meets the real-time requirement.

关键词： Weapon target assignment Multi-missile cooperative attack Redistribution Auction algorithm

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Penetration Trajectory Optimization of Hypersonic Gliding Vehicles with Multiple Constraints

Penetration Trajectory Optimization of Hypersonic Gliding Ve...

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第40届中国控制会议

作者： Zhipeng Shen jianglong yu Xiwang Dong Qingdong Li Zhang Ren School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University) Ministry of Education of China Chongqing University

The penetration trajectory optimization problem of hypersonic gliding vehicles（HGV） with multiple constraints is investigated. Firstly, the attack-defense confrontation models are established, where the HGV is required to achieve effective penetration under interception missile using Proportional Navigation Guidance（PNG） method. Then the original penetration trajectory optimization problem under multiple constraints is converted into a second-order cone programming（SOCP） problem through linearization, discretization and convexification manipulation. The online sequential convex optimization algorithm is used to solve the SOCP problem. Finally, numerical simulations are given to demonstrate the effectiveness of the method and penetration effect.

关键词： Penetration Hypersonic gliding vehicles Trajectory optimization Convex optimization Multiple constraints

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Finite-time adaptive cooperative guidance for multiple missiles

Finite-time adaptive cooperative guidance for multiple missi...

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第40届中国控制会议

作者： Pengfei Shi jianglong yu Ziyan Chen Xiwang Dong Zhang Ren School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University) Ministry of Education of ChinaChongqing University

This paper studies the finite-time convergent cooperative guidance problem for multiple missiles to achieve the coordination of the flight time. The control variable is relaxed equivalently and an additional term utilizing the local state information is added such that the finite-time convergence being guaranteed. Furthermore, the time-varying coupling gains are introduced in the guidance law and an algorithm to depict the design process is proposed so that the cooperative guidance law for each follower missile is fully distributed. In addition, finite-time convergence of the guidance error is proved based on Lyapunov theory. Finally, a numerical example is displayed to validate the effectiveness of the proposed theoretical results.

关键词： Cooperative guidance finite-time convergence adaptive control

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Cooperative Interception Strategy for Maneuverable Target Based on Interception Area

Cooperative Interception Strategy for Maneuverable Target Ba...

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第43届中国控制会议

作者： Kaize yu jianglong yu Chunwang Jiang Qingke Tan Rui Lv Yanyan Wang Xijing Hu School of Automation Science and Electrical Engineering Beihang University China Academy of Launch Vehicle Technology Beijing Research Institute of Mechanical and Electric Technology

This paper focus on developing a cooperative interception strategy for maneuverable target based on the interception area of the ***,the trajectory of the target is predicted using a fitting method to obtain the expected interception ***,a cooperative interception strategy is formulated based on the missile interception area and the expected interception point to achieve full coverage of the target reachable area from the interception ***,the missile midcourse guidance trajectory satisfying the angle-of-attack constraint is obtained by the model predictive static programming and will be iterated according to the target ***,the interception simulation is carried out on a maneuverable hypersonic target in the near space,which proves that this interception strategy can realize the coverage of the missile interception area on the target reachable area.

关键词： Hypersonic vehicle trajectory prediction model predictive static programming interception area

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基于自适应非稳态相位校正的时频域多尺度全波形反演

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地球物理学报 2018年第7期61卷 2969-2988页

作者：胡勇韩立国于江龙陈瑞鼎吉林大学地球探测科学与技术学院长春130026 中国石油新疆油田分公司勘探开发研究院新疆克拉玛依834000

本文提出非稳态相位校正时频域目标函数,通过缩小观测数据与模拟数据在波形相位上的差异来缓解全波形反演过程中对应波形匹配错位的问题(周波跳跃).同时引入自适应相位校正因子,可以根据观测数据与模拟数据的差异来调整相位校正量的大小... 详细信息

本文提出非稳态相位校正时频域目标函数,通过缩小观测数据与模拟数据在波形相位上的差异来缓解全波形反演过程中对应波形匹配错位的问题(周波跳跃).同时引入自适应相位校正因子,可以根据观测数据与模拟数据的差异来调整相位校正量的大小.在构建非稳态相位校正时频域全波形反演目标函数的基础上,利用链式法则详细推导了对应的伴随震源,并从理论上证明了该方法的可行性与优越性.数值测试过程中结合了低通滤波多尺度反演策略,进一步缓解全波形反演过程中的强非线性问题.缺失低频分量测试结果表明,利用自适应非稳态相位校正时频域多尺度全波形反演方法结合常规全波形反演方法在缺失7Hz以下低频分量的地震数据中仍然能够得到高精度的反演结果.震源不准确测试结果表明,即使震源子波相位差异较大,利用非稳态相位校正方法仍然能够一定程度上缓解周波跳跃现象.测试结果综合证明了本文提出的方法在构建初始速度建模,缓解周波跳跃等方面具有一定的优势.

关键词：全波形反演多尺度策略伴随状态法自适应非稳态相位校正时频域

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Cooperative guidance strategy with a leader-follower structure

Cooperative guidance strategy with a leader-follower structu...

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第40届中国控制会议

作者： Zhexin Shi jianglong yu Jiahong Wei Xiwang Dong Qingdong Li Zhang Ren School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Key Laboratory of Dependable Service Computing in Cyber Physical Society (Chongqing University) Ministry of Education of ChinaChongqing University

The cooperative guidance design and analysis issues for multiple robots system are investigated. First, a cooperative guidance structure is constructed by leader layer robots and follower layer robots. Then, for the leader robot layer, the cooperative detection guidance law is designed to achieve the coordination of the detection field of view（FOV）, while providing the reference trajectories. Third, for the follower robot layer, the time-varying line of sight（LOS） angle formation tracking guidance law is proposed based on the leader robots’ LOS angle trajectories convex combination. In addition, the design process is given ***, a cooperative guidance platform consisting of two leaders, three followers, and a target is constructed. The theoretical results are verified by numerical simulation examples, and experimental results are presented on the platform.

关键词： Paper Instruction Chinese Control Conference

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