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Iterated rational quadratic kernel-High-order unscented Kalman filtering algorithm for spacecraft tracking
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作者 Xinru Liang Changsheng Gao +1 位作者 Wuxing Jing Ruoming An 《Defence Technology(防务技术)》 2025年第3期238-250,共13页
The high-speed development of space defense technology demands a high state estimation capacity for spacecraft tracking methods.However,reentry flight is accompanied by complex flight environments,which brings to the ... The high-speed development of space defense technology demands a high state estimation capacity for spacecraft tracking methods.However,reentry flight is accompanied by complex flight environments,which brings to the uncertain,complex,and strongly coupled non-Gaussian detection noise.As a result,there are several intractable considerations on the problem of state estimation tasks corrupted by complex non-Gaussian outliers for non-linear dynamics systems in practical application.To address these issues,a new iterated rational quadratic(RQ)kernel high-order unscented Kalman filtering(IRQHUKF)algorithm via capturing the statistics to break through the limitations of the Gaussian assumption is proposed.Firstly,the characteristic analysis of the RQ kernel is investigated in detail,which is the first attempt to carry out an exploration of the heavy-tailed characteristic and the ability on capturing highorder moments of the RQ kernel.Subsequently,the RQ kernel method is first introduced into the UKF algorithm as an error optimization criterion,termed the iterated RQ kernel-UKF(RQ-UKF)algorithm by derived analytically,which not only retains the high-order moments propagation process but also enhances the approximation capacity in the non-Gaussian noise problem for its ability in capturing highorder moments and heavy-tailed characteristics.Meanwhile,to tackle the limitations of the Gaussian distribution assumption in the linearization process of the non-linear systems,the high-order Sigma Points(SP)as a subsidiary role in propagating the state high-order statistics is devised by the moments matching method to improve the RQ-UKF.Finally,to further improve the flexibility of the IRQ-HUKF algorithm in practical application,an adaptive kernel parameter is derived analytically grounded in the Kullback-Leibler divergence(KLD)method and parametric sensitivity analysis of the RQ kernel.The simulation results demonstrate that the novel IRQ-HUKF algorithm is more robust and outperforms the existing advanced UKF with respect to the kernel method in reentry vehicle tracking scenarios under various noise environments. 展开更多
关键词 Kernel method Rational quadratic(RQ)kernel high-order sigma points SPACECRAFT Reentry vehicles
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High-order sliding mode attitude controller design for reentry flight 被引量:7
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作者 Liang Wang Yongzhi Sheng Xiangdong Liu 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2014年第5期848-858,共11页
A novel high-order sliding mode control strategy is proposed for the attitude control problem of reentry vehicles in the presence of parametric uncertainties and external disturbances, which results in the robust and ... A novel high-order sliding mode control strategy is proposed for the attitude control problem of reentry vehicles in the presence of parametric uncertainties and external disturbances, which results in the robust and accurate tracking of the aerodynamic angle commands with the finite time convergence. The proposed control strategy is developed on the basis of integral sliding mode philosophy, which combines conventional sliding mode control and a linear quadratic regulator over a finite time interval with a free-final-state and allows the finite-time establishment of a high-order sliding mode. Firstly, a second-order sliding mode attitude controller is designed in the proposed high-order siding mode control framework. Then, to address the control chattering problem, a virtual control is introduced in the control design and hence a third-order sliding mode attitude controller is developed, leading to the chattering reduction as well as the control accuracy improvement. Finally, simulation examples are given to illustrate the effectiveness of the theoretical results. 展开更多
关键词 reentry vehicle attitude control high-order sliding mode control integral sliding mode.
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Sustainable manufacturing,life cycle thinking and the circular economy 被引量:2
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作者 Professor Nabil Gindy 《机电工程》 CAS 2010年第6期1-6,共6页
Achieving sustainable patterns of consumption and production is perhaps the biggest challenge facing our society today. The de-mand for more safe environmentally benign products is rising and many companies are lookin... Achieving sustainable patterns of consumption and production is perhaps the biggest challenge facing our society today. The de-mand for more safe environmentally benign products is rising and many companies are looking for new ways to progressively improve the sus-tainability of their products. Moreover, there are numerous opportunities and countless innovations, technological as well as non-technologi-cal,that need to be exploited to improve the sustainability of products. Manufacturing industry is an important sector of any economy and hasthe potential to become a driving force for enabling sustainable patterns of production and consumption through introducing efficient productionpractices and developing products and services that help reduce environmental impacts. The benefits of adopting an integrated policy towardsproduct development based on life cycle thinking and eco-design to stimulate improvement of the environmental performance of each part ofproduct life cycle phases and achieve sustainable patterns of production and consumption are emphasized. The challenges in implementingsustainable manufacturing and the circular economy approaches are listed. A number of solutions are suggested to face up these challenges,for instance, increased awareness of enterprises particularly SME's of product life cycle issues and the opportunities that are available for costsavings and profit making from eco-innovation in product development for both the domestic and export markets and providing practical helpand advice directly to enterprises on integrated product development to promote enterprise led Eco-innovation. Aiming at contributing to sus-tainable manufacturing in China, Sino-UK Low Carbon Manufacturing Consortium, a multi-disciplinary research and educational partnershipbetween academia, industry and government agencies in the UK and China with interest in sustainable manufacturing issues, has been formedrecently.The vision, aims and benefits of membership of the consortium are also discussed. 展开更多
关键词 Sustainable Manufacturing Low Carbon Manufacturing ECO-DESIGN Life Cycle thinking the Circular Economy
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Media Convergence:the Culture Dimensions of Thinking 被引量:1
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作者 shen diao lan ju 《学术界》 CSSCI 北大核心 2017年第11期314-323,共10页
In the process of meida Convergence,many researchers paid excessive attention to media technology, industry and management,and ignored the culture dimensions of media convergence. Therefore,to transcend media converge... In the process of meida Convergence,many researchers paid excessive attention to media technology, industry and management,and ignored the culture dimensions of media convergence. Therefore,to transcend media convergence technology, industrial thinking and more to the particularity attach importance to cultural media, it is a right way to achieve media convergence. But in the context of China's culture,media convergence should value the cultural uniqueness and the imbalance of the realistic problems,to reach innovation and breakthrough. 展开更多
关键词 MEDIA CONVERGENCE CULTURAL thinking CONVERGENCE CULTURE Chinese CONTEXT
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High-order extended coprime array design for direction of arrival estimation 被引量:5
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作者 SHI Junpeng WEN Fangqing +2 位作者 LIU Yongxiang LIU Tianpeng LIU Zhen 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2021年第4期748-755,共8页
Nonuniform linear arrays,such as coprime array and nested array,have received great attentions because of the increased degrees of freedom(DOFs)and weakened mutual coupling.In this paper,inspired by the existing copri... Nonuniform linear arrays,such as coprime array and nested array,have received great attentions because of the increased degrees of freedom(DOFs)and weakened mutual coupling.In this paper,inspired by the existing coprime array,we propose a high-order extended coprime array(HoECA)for improved direction of arrival(DOA)estimation.We first derive the closed-form expressions for the range of consecutive lags.Then,by changing the inter-element spacing of a uniform linear array(ULA),three cases are proposed and discussed.It is indicated that the HoECA can obtain the largest number of consecutive lags when the spacing takes the maximum value.Finally,by comparing it with the other sparse arrays,the optimized HoECA enjoys a larger number of consecutive lags with mitigating mutual coupling.Simulation results are shown to evaluate the superiority of HoECA over the others in terms of DOF,mutual coupling leakage and estimation accuracy. 展开更多
关键词 high-order extended coprime array(HoECA) direction of arrival(DOA) degree of freedom(DOF) mutual coupling
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Observer-based robust high-order fully actuated attitude autopilot design for spinning glide-guided projectiles 被引量:3
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作者 Wei Wang Yuchen Wang +2 位作者 Shiwei Chen Yongcang Guo Zhongjiao Shi 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第4期282-294,共13页
This paper investigates the design of an attitude autopilot for a dual-channel controlled spinning glideguided projectile(SGGP),addressing model uncertainties and external disturbances.Based on fixed-time stable theor... This paper investigates the design of an attitude autopilot for a dual-channel controlled spinning glideguided projectile(SGGP),addressing model uncertainties and external disturbances.Based on fixed-time stable theory,a disturbance observer with integral sliding mode and adaptive techniques is proposed to mitigate total disturbance effects,irrespective of initial conditions.By introducing an error integral signal,the dynamics of the SGGP are transformed into two separate second-order fully actuated systems.Subsequently,employing the high-order fully actuated approach and a parametric approach,the nonlinear dynamics of the SGGP are recast into a constant linear closed-loop system,ensuring that the projectile's attitude asymptotically tracks the given goal with the desired eigenstructure.Under the proposed composite control framework,the ultimately uniformly bounded stability of the closed-loop system is rigorously demonstrated via the Lyapunov method.Validation of the effectiveness of the proposed attitude autopilot design is provided through extensive numerical simulations. 展开更多
关键词 Spinning glide-guided projectile Attitude control Sliding mode disturbance observer Fixed-time stable theory high-order fully actuated approach
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Fast self-adapting high-order sliding mode control for a class of uncertain nonlinear systems 被引量:3
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作者 GUO Fuhui LU Pingli 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2021年第3期690-699,共10页
A fast self-adapting high-order sliding mode(FSHOSM)controller is designed for a class of nonlinear systems with unknown uncertainties.As for uncertainty-free nonlinear system,a new switching condition is introduced i... A fast self-adapting high-order sliding mode(FSHOSM)controller is designed for a class of nonlinear systems with unknown uncertainties.As for uncertainty-free nonlinear system,a new switching condition is introduced into the standard geometric homogeneity.Different from the existing geometric homogeneity method,both state variables and their derivatives are considered to bring a reasonable effective switching condition.As a result,a faster convergence rate of state variables is achieved.Furthermore,based on the integral sliding mode(ISM)and above geometric homogeneity,a self-adapting high-order sliding mode(HOSM)control law is proposed for a class of nonlinear systems with uncertainties.The resulting controller allows the closed-loop system to conduct with the expected properties of strong robustness and fast convergence.Stable analysis of the nonlinear system is also proved based on the Lyapunov approach.The effectiveness of the resulting controller is verified by several simulation results. 展开更多
关键词 adaptive control law geometric homogeneity high-order sliding mode(HOSM) integral sliding mode(ISM)
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Multi-factor high-order intuitionistic fuzzy timeseries forecasting model 被引量:1
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作者 Ya'nan Wang Yingjie Lei +1 位作者 Yang Lei Xiaoshi Fan 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2016年第5期1054-1062,共9页
Fuzzy sets theory cannot describe the neutrality degreeof data, which has largely limited the objectivity of fuzzy time seriesin uncertain data forecasting. With this regard, a multi-factor highorderintuitionistic fuz... Fuzzy sets theory cannot describe the neutrality degreeof data, which has largely limited the objectivity of fuzzy time seriesin uncertain data forecasting. With this regard, a multi-factor highorderintuitionistic fuzzy time series forecasting model is built. Inthe new model, a fuzzy clustering algorithm is used to get unequalintervals, and a more objective technique for ascertaining membershipand non-membership functions of the intuitionistic fuzzy setis proposed. On these bases, forecast rules based on multidimensionalintuitionistic fuzzy modus ponens inference are established.Finally, contrast experiments on the daily mean temperature ofBeijing are carried out, which show that the novel model has aclear advantage of improving the forecast accuracy. 展开更多
关键词 multi-factor high-order intuitionistic fuzzy time series forecasting model intuitionistic fuzzy inference.
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Rationality,Logic and Critical Thinking Education in China
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作者 Zhang Cunjian 《学术界》 CSSCI 北大核心 2019年第9期185-197,共13页
In uncovering the mechanisms of teaching critical thinking in China,scholars tend to ignore the re-quirement of rational thinking in teaching. Based on the discussion of rational presuppositions of critical thinking i... In uncovering the mechanisms of teaching critical thinking in China,scholars tend to ignore the re-quirement of rational thinking in teaching. Based on the discussion of rational presuppositions of critical thinking in Western cultures, this article argues that, while Western critical thinking presets a kind of rationality which is biased to-wards descriptive logic rather than prescriptive logic, the virtue - centered traditional Chinese culture cultivates a gener-al habit of using methods of prescriptive logic. Descriptive logic accounts for “how to get” true judgments while pre- scriprive logic aims at explaining “why a true judgment is true”. Critical thinking education in China should pay more attention to the role descriptive logic plays. The fact that the new - media infomiarion disseminarion is deepening in- tercultiiral communication makes it necessary to implement critical thinking education in China,but the implementa-tion should be focused on cultivating the students* ability to organize discourse in a logical way. 展开更多
关键词 RATIONALITY logic critical thinking EDUCATION DISCOURSE COMPETENCE
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An Analysis of the Cultural Differences Between China and the West from the Perspective of Mode of Thinking
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作者 Zhang Yan Yu Bin 《学术界》 CSSCI 北大核心 2018年第7期257-267,共11页
People with various cultural backgrounds and habits have different modes of thinking,making it difficult to communicate between different cultures. Based on culture,thinking and their relationship,this paper analyzes ... People with various cultural backgrounds and habits have different modes of thinking,making it difficult to communicate between different cultures. Based on culture,thinking and their relationship,this paper analyzes the differences between Chinese and the Western cultures to find the solutions to the problem of how to use the differences to establish international mind and global vision to achieve"cultural confidence". 展开更多
关键词 cultural differences modes of thinking intercultural communication
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Satisfactory PI-P Controller Design for High-order Servo System
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作者 马建伟 郭治 吴钦 《Defence Technology(防务技术)》 SCIE EI CAS 2005年第2期196-200,共5页
The paper presents an output feedback controller design method for high-order servo system with the constraints of multiple indices by using satisfactory control theory. The control strategy is to convert transfer-fun... The paper presents an output feedback controller design method for high-order servo system with the constraints of multiple indices by using satisfactory control theory. The control strategy is to convert transfer-function form of two-loop servo system into state-space form and assign the system poles in the specified region and H_∞ attenuation degree in the given range with the Riccati matrix inequality so that the closed-loop system has good dynamics and robust quality. A numeric example is given to show the effectiveness of the proposed approach. 展开更多
关键词 high-order SERVO system satisfactory control PI-P CONTROLLER RICCATI matrix inequality
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Association Thinking and Imagery Thinking in Learning English Phrasal Verbs
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作者 朱贵生 《北京林业大学学报》 CAS CSCD 北大核心 1992年第S1期97-101,共5页
Phrasal verbs,such as look after,look forward to,look through,etc.,account for a large per-centage in English vocabulary,and they are even more difficult than single words for.English learn-ers to learn.For one reason... Phrasal verbs,such as look after,look forward to,look through,etc.,account for a large per-centage in English vocabulary,and they are even more difficult than single words for.English learn-ers to learn.For one reason,they are of a large quantity by formation.By looking throughWebster’s Third New International Dictionary(1961),we can see how colorful the forms of 展开更多
关键词 COLORFUL LOOKING centage vocabulary latter TELEVISION IMAGERY instance thinking DETAILS
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Four optimal design approaches of high-order finite-impulse response filters based on neural network
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作者 王小华 何怡刚 刘美容 《Journal of Central South University of Technology》 EI 2007年第1期94-99,共6页
Four optimal approaches of high-order finite-impulse response(FIR) digital filters were developed for designing four types filters using neural network algorithms. The solutions were presented as parallel algorithms t... Four optimal approaches of high-order finite-impulse response(FIR) digital filters were developed for designing four types filters using neural network algorithms. The solutions were presented as parallel algorithms to approximate the desired frequency response specification. Therefore, these methods avoid matrix inversion, and make a fast calculation of the filter’s coefficients possible. The convergence theorems of these proposed algorithms were presented and proved to illustrate them stable, and the implementation of these methods was described together with some design guidelines. The simulation results show that the ripples of the designed FIR filters are significantly little in the pass-band and stop-band, and the proposed algorithms are of fast convergence. 展开更多
关键词 high-order finite-impulse response digital filter frequency response neural network convergence theorem
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Chinese and Western Thinking Patterns and Value Orientation Based on Cross-Cultural Communication
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作者 Cui Can Duan Cheng 《学术界》 CSSCI 北大核心 2020年第10期209-216,共8页
In cross-cultural communication(CC),due to the different cultural backgrounds and values,there are great differences between Chinese and Western thinking patterns,which often lead to cultural conflicts.Cultural differ... In cross-cultural communication(CC),due to the different cultural backgrounds and values,there are great differences between Chinese and Western thinking patterns,which often lead to cultural conflicts.Cultural differences cover a wide range,and this paper analyzes the great influence of cultural differences on CC from the perspectives of thinking patterns and value orientation in daily life in China and the West,and intends to find out the reasons behind and come up with solutions. 展开更多
关键词 thinking pattern cross-cultural communication(CC) value orientation
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Metaphor Thinking and Improvement in Cross-cultural Communication
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作者 Zhou Yan Fang Lingling 《学术界》 CSSCI 北大核心 2014年第6期272-276,共5页
M etaphor is not only a rhetoric means of language,but also a basic way of human cognition and thinking. In daily life,consciously using metaphor,people comprehend the outside world through metaphor. Culture has gener... M etaphor is not only a rhetoric means of language,but also a basic way of human cognition and thinking. In daily life,consciously using metaphor,people comprehend the outside world through metaphor. Culture has generality that is different from cultural understanding in metaphor. Therefore,the application of metaphor must adapt to corresponding culture mode and common sense of historical culture,so as to form different understandings in conversation. Cross-cultural communication refers to the communication between people with different cultural backgrounds and metaphor reflects the difference between Chinese and western cognition,which also reflects the difference between Chinese and western thinking.However,context is another important reason of metaphor causing cross-cultural communication misinterpretation. As the communication between people with different cultural backgrounds,the cultivation of cross-cultural communication ability needs be formed in mutual cultural exchange,and the improvement of metaphor thinking has a great significance. 展开更多
关键词 跨文化交际 隐喻 文化背景 历史文化 文化模式 应用程序 文化交流 比喻
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Evolving Thinking and Policies of China's Diplomacy and China-EU Relations
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作者 Dr.YANG Jiemian is President of the Shanghai Institutes for International Studies and President of the Shanghai Association of International Relations 《国际展望》 2009年第3期1-13,122,共14页
Evolutions and readjustment permeate China’s diplomatic policy in the six decades’ history of PRC, thanks to the tremendous changes happened to both the world and PRC. Enormous opportunities and challenges to China ... Evolutions and readjustment permeate China’s diplomatic policy in the six decades’ history of PRC, thanks to the tremendous changes happened to both the world and PRC. Enormous opportunities and challenges to China coincide in the present world. China and EU are rising with bigger role to play in the world, though daunting challenges to bilateral relations beckon. 展开更多
关键词 PRC EU Evolving thinking and Policies of China’s Diplomacy and China-EU Relations
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利用Think Design和WorkBench的指纹枪械盒设计 被引量:1
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作者 陈东帆 王照亮 +1 位作者 汪红 李良 《现代制造工程》 CSCD 北大核心 2011年第7期58-61,共4页
为给国家公安机关、司法机关提供更为安全的保管枪支方案,设计出一套更为先进、稳妥的指纹枪械盒。结合成熟的指纹识别技术与计算机仿真技术,在三维造型软件Think Design中进行指纹枪械盒的结构设计,并通过Think De-sign与ANSYS的接口... 为给国家公安机关、司法机关提供更为安全的保管枪支方案,设计出一套更为先进、稳妥的指纹枪械盒。结合成熟的指纹识别技术与计算机仿真技术,在三维造型软件Think Design中进行指纹枪械盒的结构设计,并通过Think De-sign与ANSYS的接口模块将模型导入ANSYS WorkBench软件中进行力学分析和疲劳测试,设计出满足使用要求的模型。在ANSYS环境中,验证盒体结构设计的合理性,并进行结构优化,设计出合理、稳固的指纹枪械盒。该设计同时验证了Think Design与ANSYS结合的技术路线更为高效。 展开更多
关键词 指纹识别 think Design软件 ANSYS WorkBench软件
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Thinks整木定制家具一体化设计解决方案研究 被引量:2
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作者 陈哲 《家具与室内装饰》 2018年第1期52-57,共6页
整木定制家具产业正成为国内家具产业的重要发展方向,其中整木定制家具的设计成为整个产业链的薄弱环节。Think Design家具三维设计软件针对整木定制家具设计的独特要求,针对性的提出了一体化设计解决方案,该软件基于统一的数据平台,实... 整木定制家具产业正成为国内家具产业的重要发展方向,其中整木定制家具的设计成为整个产业链的薄弱环节。Think Design家具三维设计软件针对整木定制家具设计的独特要求,针对性的提出了一体化设计解决方案,该软件基于统一的数据平台,实现家具的造型设计、结构设计、工程图、BOM输出、无缝集成ERP/PLM系统、数控加工设备之间的无缝联接,成为目前最适合国内外整木定制家具企业的研发平台。 展开更多
关键词 think Design设计软件 整木定制家具设计 一体化 设计解决方案
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人智协同创造力回溯AIGC科学与审美的思维共创 被引量:2
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作者 张岩 郭宇刚 罗旭 《中国电化教育》 北大核心 2025年第3期86-93,共8页
超速发展的大模型升级了推理水平和多模态处理能力,支撑和提升了AIGC的生成力和创造力。AIGC支持学习者科学思维和审美思维的融合共创,为科学教育和美育的跨学科学习开辟了新路径。该研究依据技术可供性对人类认知的影响,从智能技术环... 超速发展的大模型升级了推理水平和多模态处理能力,支撑和提升了AIGC的生成力和创造力。AIGC支持学习者科学思维和审美思维的融合共创,为科学教育和美育的跨学科学习开辟了新路径。该研究依据技术可供性对人类认知的影响,从智能技术环境中人智协同的现象入手,将人智协同的任务协同推演到人智协同的创造协同,确立了包括人智信任在内的人智协同创造力的概念及其基本内容。以涵养学习者的人智协同创造力为导向,分析了AIGC的知识获取和认知模式,从计算思维等常规思维中拔擢出AIGC思维方法。AIGC思维是人智协同中涵盖知情意的整体性意识活动,科学思维和审美思维是AIGC思维的内核,“现象←→体验”双向反馈是AIGC思维的外显。AIGC思维可以自觉调配人类智能协同力和主动获取AI协同力,并且通过科学专注和审美奖励的结合获得思维增益。AIGC思维通过强化学习者语言图式和视觉图式的科学性与审美性促进人智信任的养成。 展开更多
关键词 人智协同创造力 科学思维 审美思维 AIGC思维 跨学科学习
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IBM Think Vantage技术
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《信息网络安全》 2004年第10期48-48,共1页
ThinkVantage技术(TVT)是IBMThink战略的重要支持部分,其目标是使IBM PC产品具有自我监控、自我配置、自我优化和自我恢复的能力,从而最大限度地降低用户的PC总体拥有成本,最终帮助客户赢得商业成功.TVT技术有一个共同的特点,就是都非... ThinkVantage技术(TVT)是IBMThink战略的重要支持部分,其目标是使IBM PC产品具有自我监控、自我配置、自我优化和自我恢复的能力,从而最大限度地降低用户的PC总体拥有成本,最终帮助客户赢得商业成功.TVT技术有一个共同的特点,就是都非常实用,能够切实解决使用者的问题,这是因为IBM PC技术的发展方向就是降低成本和提高易用性. 展开更多
关键词 技术 think战略 客户 商业 IBM 产品 降低成本 PC 易用性 总体拥有成本
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