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Generating native user interfaces formultiple devices by means ofmodel transformation
Ignacio MARIN,Francisco ORTIN,German PEDROSA,Javier RODRIGUEZ
《信息与电子工程前沿(英文)》 2015年 第16卷 第12期 页码 995-1017 doi: 10.1631/FITEE.1500083
关键词: Model-to-model transformation Native user interfaces Model-based user interfaces Model-driven engineering
Cohesive zone model-based analyses of localized leakage of segmentally lined tunnels
《结构与土木工程前沿(英文)》 2023年 第17卷 第4期 页码 503-521 doi: 10.1007/s11709-023-0927-4
关键词: segmentally lined tunnel localized leakage cohesive element hydraulic behavior numerical modeling
Current status and prospects of reliability systems engineering in China
《工程管理前沿(英文)》 2021年 第8卷 第4期 页码 492-502 doi: 10.1007/s42524-021-0172-2
关键词: reliability effectiveness model-based systems engineering reliability systems engineering
Image-based fall detection and classification of a user with a walking support system
Sajjad TAGHVAEI, Kazuhiro KOSUGE
《机械工程前沿(英文)》 2018年 第13卷 第3期 页码 427-441 doi: 10.1007/s11465-017-0465-7
The classification of visual human action is important in the development of systems that interact with humans. This study investigates an image-based classification of the human state while using a walking support system to improve the safety and dependability of these systems. We categorize the possible human behavior while utilizing a walker robot into eight states (i.e., sitting, standing, walking, and five falling types), and propose two different methods, namely, normal distribution and hidden Markov models (HMMs), to detect and recognize these states. The visual feature for the state classification is the centroid position of the upper body, which is extracted from the user’s depth images. The first method shows that the centroid position follows a normal distribution while walking, which can be adopted to detect any non-walking state. The second method implements HMMs to detect and recognize these states. We then measure and compare the performance of both methods. The classification results are employed to control the motion of a passive-type walker (called “RT Walker”) by activating its brakes in non-walking states. Thus, the system can be used for sit/stand support and fall prevention. The experiments are performed with four subjects, including an experienced physiotherapist. Results show that the algorithm can be adapted to the new user’s motion pattern within 40 s, with a fall detection rate of 96.25% and state classification rate of 81.0%. The proposed method can be implemented to other abnormality detection/classification applications that employ depth image-sensing devices.
关键词: fall detection walking support hidden Markov model multivariate analysis
Model-based nonlinear control of hydraulic servo systems: Challenges, developments and perspectives
Jianyong YAO
《机械工程前沿(英文)》 2018年 第13卷 第2期 页码 179-210 doi: 10.1007/s11465-018-0464-3
Hydraulic servo system plays a significant role in industries, and usually acts as a core point in control and power transmission. Although linear theory-based control methods have been well established, advanced controller design methods for hydraulic servo system to achieve high performance is still an unending pursuit along with the development of modern industry. Essential nonlinearity is a unique feature and makes model-based nonlinear control more attractive, due to benefit from prior knowledge of the servo valve controlled hydraulic system. In this paper, a discussion for challenges in model-based nonlinear control, latest developments and brief perspectives of hydraulic servo systems are presented: Modelling uncertainty in hydraulic system is a major challenge, which includes parametric uncertainty and time-varying disturbance; some specific requirements also arise ad hoc difficulties such as nonlinear friction during low velocity tracking, severe disturbance, periodic disturbance, etc.; to handle various challenges, nonlinear solutions including parameter adaptation, nonlinear robust control, state and disturbance observation, backstepping design and so on, are proposed and integrated, theoretical analysis and lots of applications reveal their powerful capability to solve pertinent problems; and at the end, some perspectives and associated research topics (measurement noise, constraints, inner valve dynamics, input nonlinearity, etc.) in nonlinear hydraulic servo control are briefly explored and discussed.
关键词: hydraulic servo system adaptive control robust control nonlinear friction disturbance compensation repetitive control noise alleviation constraint control
Lockhart Bogle Ian David
《工程(英文)》 2017年 第3卷 第2期 页码 161-165 doi: 10.1016/J.ENG.2017.02.003
本文讨论了流程工业智能制造对过程系统工程(PSE) 研究人员提出的挑战。现有的研究在实现全厂和全站点优化方面已经取得了很大进展,进行基准化测试能够增加说服力。本文进一步讨论了过程系统工程师在开发可用工具和技术时遇到的技术性挑战,包括灵活性和不确定性,响应性和敏捷性,鲁棒性和安全性,混合物性质和功能的预测,以及新的建模和数学范式。利用大数据进行智能化开发来驱动系统灵活性需要面对新的挑战,例如,如何在漫长又复杂的供应链中确保数据的一致性和机密性。建模方面也存在很多挑战,涉及如何对所有的关键技术进行恰当的建模,特别是健康、安全和环境方面,需要在特定地点对微小却关键的量进行准确预测。对环境方面的关注要求我们紧密跟踪所有的分子种类,以便于它们能被最佳地用于创造可持续的解决方案。而源自于新型个性化产品的破坏性商业模式对环境的影响则难以预测。
云存储中基于属性加密的通用型用户撤销系统 None
Genlang CHEN, Zhiqian XU, Hai JIANG, Kuan-ching LI
《信息与电子工程前沿(英文)》 2018年 第19卷 第11期 页码 1362-1384 doi: 10.1631/FITEE.1800405
Correlated channel model-based secure communications in dual-hop wireless communication networks Article
Zhen-hua YUAN, Chen CHEN, Xiang CHENG, Guo-cheng LV, Liu-qing YANG, Ye JIN
《信息与电子工程前沿(英文)》 2017年 第18卷 第6期 页码 796-807 doi: 10.1631/FITEE.1700023
Vassilis M. Charitopoulos,Lazaros G. Papageorgiou,Vivek Dua
《工程(英文)》 2017年 第3卷 第2期 页码 202-213 doi: 10.1016/J.ENG.2017.02.008
本文提出了新的两(多) 参数规划(mp-P) 启发算法以求解混合整数非线性规划(MINLP) 问题,并着重说明了算法在过程综合问题中的应用。对于因对数项导致的非线性,开发了针对确定性问题的参数算法(p-MINLP)。关键之处是通过将二进制变量和(或) 不确定参数作为符号参数重新生成和求解一阶Karush Kuhn Tucker(KKT) 系统的解析表达式。为此,采用了符号处理和求解技术。为了证明所提出的算法的适用性和有效性,对两个过程综合案例研究进行了验证,相应的结果经最新的数值MINLP 求解器验证是有效的。对于p-MINLP,给出了不确定参数的显函数表示的最优解。
Conceptual study on incorporating user information into forecasting systems
Jiarui HAN, Qian YE, Zhongwei YAN, Meiyan JIAO, Jiangjiang XIA
《环境科学与工程前沿(英文)》 2011年 第5卷 第4期 页码 533-542 doi: 10.1007/s11783-010-0246-6
关键词: user-end information user-oriented interactive forecasting system TIGGE (THORPEX interactive grand global ensemble)
A lightweight authentication scheme with user untraceability
Kuo-Hui YEH
《信息与电子工程前沿(英文)》 2015年 第16卷 第4期 页码 259-271 doi: 10.1631/FITEE.1400232
关键词: Authentication Privacy Security Smart card Untraceability
基于简化LSCMA算法的STBC MC-CDMA系统盲多用户检测
熊亦兰,酆广增
《中国工程科学》 2007年 第9卷 第5期 页码 42-45
在空时分组编码(STBC)的MC-CDMA系统中,根据STBC正交编码的特点,提出了一种简单可行 的基于常模(CM)准则的盲多用户检测算法。该算法基于最小二乘常模算法(LSCMA)的盲多用户检测算法, 算法大为简化,抽头系数减少了一半,性能略有下降。
关键词: 盲多用户检测 简化LSCMA算法 空时编码MC-CDMA
夏瑶,黄志球
《信息与电子工程前沿(英文)》 2021年 第22卷 第2期 页码 141-286 doi: 10.1631/FITEE.1900726
Joint user association and resource partition for downlink-uplink decoupling in multi-tier HetNets Article
Zhi-yong FENG, Ze-bing FENG, T. Aaron GULLIVER
《信息与电子工程前沿(英文)》 2017年 第18卷 第6期 页码 817-829 doi: 10.1631/FITEE.1700031
标题 作者 时间 类型 操作
Generating native user interfaces formultiple devices by means ofmodel transformation
Ignacio MARIN,Francisco ORTIN,German PEDROSA,Javier RODRIGUEZ
期刊论文
Image-based fall detection and classification of a user with a walking support system
Sajjad TAGHVAEI, Kazuhiro KOSUGE
期刊论文
Model-based nonlinear control of hydraulic servo systems: Challenges, developments and perspectives
Jianyong YAO
期刊论文
Correlated channel model-based secure communications in dual-hop wireless communication networks
Zhen-hua YUAN, Chen CHEN, Xiang CHENG, Guo-cheng LV, Liu-qing YANG, Ye JIN
期刊论文
Conceptual study on incorporating user information into forecasting systems
Jiarui HAN, Qian YE, Zhongwei YAN, Meiyan JIAO, Jiangjiang XIA
期刊论文