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适于低成本嵌入式硬件的2R-1C模型非迭代参数估计 Article

Mitar SIMIĆ, Zdenka BABIĆ, Vladimir RISOJEVIĆ, Goran M. STOJANOVIĆ

《信息与电子工程前沿（英文）》 2020年第21卷第3期页码 476-490 doi: 10.1631/FITEE.1900112

摘要： 2R-1C模型的参数估计常运用需要高性能处理单元的迭代方法，从而激励我们研究更省时且更节能的参数估计方法。这些低复杂度的算法将更适于便携式微机设备的运行。运用一组封闭表达式从测量阻抗的实部和虚部计算2R-1C模型的参数。对仿真和测量获得的模型阻抗数据作对比分析；结果表明，相较于我们早前提出的非迭代参数估计方法（NIPE），QINIPE能减少80%测量点，且所有估计参数的相对估计误差低于1%。此外，比较了QINIPE和复杂非线性最小二乘法（CNLS）对2R-1C模型参数的估计。结果表明，虽然QINIPE估计精度稍低于CNLS，其依然适合许多实际应用，且运行时间降至原来的1/45至1/30。

关键词： 2R-1C模型；嵌入式系统；参数估计；非迭代方法；二次型

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Coupling the porous conditional moment closure with the random pore model: applications to gasification and CO

SAULOV, C. R. CHODANKA, M. J. CLEARY, A. Y. KLIMENKO

《化学科学与工程前沿（英文）》 2012年第6卷第1期页码 84-93 doi: 10.1007/s11705-011-1164-2

摘要： Gasification of coal or biomass with in situ CO capture simultaneously allows production of clean hydrogen at relatively low cost and reduced emission of CO into the atmosphere. Clearly, this technology has a great potential for a future carbon constrained economy. Therefore, the development of a comprehensive, physically-based gasifier model is important. The sub-models that describe reactive transport processes in coal particles as well as in particles of CO sorbent material are among the key sub-models, which provide a necessary input for an overall gasifier model. Both coal and sorbent are materials that have complicated pore structures. The porous conditional moment closure (PCMC) model proves to be adequate for modeling reactive transport through porous media with fixed pore structure. Consumption of coal in the heterogeneous gasification reaction, however, widens the pores and reduces the surface area available for this reaction. At the same time, formation of a carbonate layer narrows the pores in the sorbent material and reduces the reaction rate of CO sorption. In both cases the pore structures are affected. Such changes are not taken into account in the existing PCMC model. In this study, we obtain the parameters of the diffusive tracer distribution based on the pore size distribution given by the widely applied random pore model (RPM), while coupling PCMC with RPM. Such coupling allows taking into account changes in pore structure caused by heterogeneous reactions and thus improves the accuracy of these key sub-models.

关键词： gasification CO₂ capture PCMC RPM

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A multi-scale model for CO

R. WEI, V. RUDOLPH, C. T. WEI, Y. QIN

《化学科学与工程前沿（英文）》 2009年第3卷第1期页码 20-25 doi: 10.1007/s11705-009-0138-0

摘要： This paper presents a multi-scale model to simulate the multicomponent gas diffusion and flow in bulk coals for CO sequestration enhanced coalbed methane recovery. The model is developed based on a bi-dispersed structure model by assuming that coal consists of microporous micro-particles, meso/macro-pores and open microfractures. The bi-disperse diffusion theory and the Maxwell-Stefan approach were incorporated in the model, providing an improved simulation of the CH —CO /CH —N counter diffusion dynamics. In the model, the counter diffusion process is numerically coupled with the flow of the mixture gases occurring within macro-pores or fractures in coal so as to account for the interaction between diffusion and flow in gas transport through coals. The model was validated by both experimental data from literature and our CO flush tests, and shows an excellent agreement with the experiments. The results reveal that the gas diffusivities, in particular the micro-pore diffusivities are strongly concentration-dependent.

关键词： multi-scale model gas transport coal coalbed methane CO₂ sequestration

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在光纤激光器中利用Ti3C2 MXene材料产生矢量孤子和类噪声脉冲 Research

王帅1,李雷1,宋宇峰2,唐定远3,沈德元1,赵鹭明1,4

《信息与电子工程前沿（英文）》 2021年第22卷第3期页码 287-436 doi: 10.1631/FITEE.2000033

摘要：本文利用Ti3C2 MXene材料作为可饱和吸收体，搭建了铥钬共掺光纤激光器，观察到矢量孤子和类噪声脉冲的形成。其中，可饱和吸收体是通过将Ti3C2溶液滴在侧面抛光的D形光纤上自然挥发后制备而成。据我们所知，这是首次利用Ti3C2 MXene材料作为可饱和吸收体从光纤激光器中获得矢量孤子。

关键词：矢量孤子；类噪声脉冲；MXene；光纤激光器

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基于最大密度的小型无人机电机速度估计与故障检测 Research Articles

SOUZA1,Moises C. BEZERRIL1,Mateus A. SILVA1,Frank C.VERAS2,Abel LIMA-FILHO3,Jorge Gabriel RAMOS4,Alisson V. BRITO1

《信息与电子工程前沿（英文）》 2021年第22卷第7期页码 1002-1009 doi: 10.1631/FITEE.2000149

摘要：介绍了基于混沌的最大密度信号分析技术在无刷直流电机分析中的应用。利用了从电流信号最大密度估计得出的相关系数。通过实验实现了无刷电机在试验台上的速度估计以及在小型无人机上的故障检测。实验结果表明，在97.8%的案例中可估计电机速度，在82.75%的分析案例中可检测故障。

关键词：无人机；速度识别；故障检测；混沌

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基于世界模型与图像表示的交通信号控制 Research Article

戴星原1,2,赵宸1,2,王晓3,吕宜生1,2,林懿伦4,王飞跃1,2

《信息与电子工程前沿（英文）》 2022年第23卷第12期页码 1795-1813 doi: 10.1631/FITEE.2200323

摘要：一个有效的预测模型对主动交通信号控制至关重要；其中预测什么交通状态，如何高精度预测，以及如何利用预测优化控制策略是主动交通信号控制研究的关键问题。本文使用车辆位置图像描述路口交通状态，同时受基于模型的强化学习方法DreamerV2的启发，引入基于学习的交通世界模型。该世界模型以图像序列描述交通动态，并作为交通环境的抽象替代以生成多步预测样本用于控制策略优化。在执行阶段，优化后的交通信号控制器根据交通状态的抽象表示直接实时输出控制指令，同时世界模型能够预测不同控制行为对未来交通状态的影响。实验结果表明，基于交通世界模型优化的控制策略的性能优于一般基准，并且世界模型实现了基于图像的高精度预测；这些结果显示了世界模型在未来交通信号控制中的应用前景。

关键词：交通信号控制；交通预测；交通世界模型；强化学习

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TIN2012-34003 and TIN2013-47074-C2-1-R) and FPU Scholarship (FPU13/03141) from the Spanish Government

Miguel OLIVER,Francisco MONTERO,José Pascual MOLINA,Pascual GONZÁLEZ,Antonio FERNÁNDEZ-CABALLERO

《信息与电子工程前沿（英文）》 2016年第17卷第4期页码 348-364 doi: 10.1631/FITEE.1500347

摘要： This paper seeks to determine how the overlap of several infrared beams affects the tracked position of the user, depending on the angle of incidence of light, distance to the target, distance between sensors, and the number of capture devices used. We also try to show that under ideal conditions using several Kinect sensors increases the precision of the data collected. The results obtained can be used in the design of telerehabilitation environments in which several RGB-D cameras are needed to improve precision or increase the tracking range. A numerical analysis of the results is included and comparisons are made with the results of other studies. Finally, we describe a system that implements intelligent methods for the rehabilitation of patients based on the results of the tests carried out.

关键词： Kinect sensor Rehabilitation system Capture precision Multi-camera system

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庞明慧1,2,朱秋明1,2,林志鹏1,柏菲1,田越1,李茁3,陈小敏1

《信息与电子工程前沿（英文）》 2022年第23卷第9期页码 1378-1389 doi: 10.1631/FITEE.2200041

摘要：然而，由于无人机等飞行器飞行高度从十几米到数千米不等，空地（air-to-ground, A2G）通信的LoS概率预测具有挑战性。本文针对A2G场景，提出一种高度相关的经验性LoS概率模型。在模型参数估计之前，设计了一种基于K近邻（K-nearest neighbors, KNN）的策略对LoS和非视距（none-line-of-sight, NLoS）路径进行分类。然后，开发了一种基于双层反向传播神经网络（back propagation neural network, BPNN）的参数估计方法来建立每个模型参数与无人机高度之间的关系。仿真表明该模型获得的结果与射线追踪（ray trancing, RT）数据、实测数据和标准模型结果具有良好一致性。该模型还可提供比其他LoS概率模型更广泛的适用高度，能够应用于各种A2G场景下的不同通信高度。

关键词：视距概率模型；空地信道；机器学习；射线跟踪

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基于动态占用网格改进概率模型的换道辅助策略 Research Articles

杨正才1,2,高振海1,高菲1,武馨宇1,何磊1

《信息与电子工程前沿（英文）》 2021年第22卷第11期页码 1492-1504 doi: 10.1631/FITEE.2000439

摘要：该模型将车辆速度、障碍物、车道线和交通规则等信息封装成一种空间驾驶概率的形式。这些信息被编译成哈希表，通过哈希函数将网格图映射到一个哈希图中。利用该模型建立一个车辆行为决策成本方程，该方程基于最小成本原则，同时考虑车辆驾驶性能、安全性和动力等影响因素，辅助驾驶员做出准确换道决策。通过车辆测试验证了该换道辅助策略的可行性。结果表明，基于动态占用网格概率模型的换道辅助系统可为驾驶者提供兼顾动力和安全性的换道辅助。

关键词：占用网格；概率模型；换道辅助

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未知辐射源信号特征辅助的广义标签多伯努利滤波器 Research Article

国强1,滕龙1,2,吴新良2,宋文明2,黄大羽2

《信息与电子工程前沿（英文）》 2022年第23卷第12期页码 1871-1880 doi: 10.1631/FITEE.2200286

摘要：针对辐射源特征时变以及对应的概率分布未知的问题，提出一种改进的模糊C-均值算法来计算目标和杂波量测的相关系数，以近似辐射源特征的似然函数。

关键词：多目标跟踪；广义标签多伯努利；辐射源信号特征；模糊C-均值；动态聚类

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Non-thermal plasma for exhaust gases treatment

Elvia ALVA R.,Marquidia PACHECO P.,Fernando GÓMEZ B.,Joel PACHECO P.,Arturo COLÍN C.,José HUERTAS C.,Hilda FRÍAS P.

《机械工程前沿（英文）》 2015年第10卷第3期页码 301-305 doi: 10.1007/s11465-015-0344-z

摘要：

This article describes a study on a non-thermal plasma device to treat exhaust gases in an internal combustion engine. Several tests using a plasma device to treat exhaust gases are conducted on a Honda GX200-196 cm³ engine at different rotational speeds. A plasma reactor could be efficient in degrading nitrogen oxides and particulate matter. Monoxide and carbon dioxide treatment is minimal. However, achieving 1%–3% degradation may be interesting to reduce the emission of greenhouse gases.

关键词： plasma treatment NO_x CO CO₂ particulate matter vehicle

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Modeling of alkali-silica reaction in concrete: a review

WANG, Q.C. SUN, C.H. ZHANG, D.R.J. OWEN

《结构与土木工程前沿（英文）》 2012年第6卷第1期页码 1-18 doi: 10.1007/s11709-012-0141-2

摘要： This paper presents a comprehensive review of modeling of alkali-silica reaction (ASR) in concrete. Such modeling is essential for investigating the chemical expansion mechanism and the subsequent influence on the mechanical aspects of the material. The concept of ASR and the mechanism of expansion are first outlined, and the state-of-the-art of modeling for ASR, the focus of the paper, is then presented in detail. The modeling includes theoretical approaches, meso- and macroscopic models for ASR analysis. The theoretical approaches dealt with the chemical reaction mechanism and were used for predicting pessimum size of aggregate. Mesoscopic models have attempted to explain the mechanism of mechanical deterioration of ASR-affected concrete at material scale. The macroscopic models, chemo-mechanical coupling models, have been generally developed by combining the chemical reaction kinetics with linear or nonlinear mechanical constitutive, and were applied to reproduce and predict the long-term behavior of structures suffering from ASR. Finally, a conclusion and discussion of the modeling are given.

关键词： alkali-silica reaction (ASR) modeling concrete mesoscopic macroscopic

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Enhancing the efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:1 to 14:1) for simultaneous C & N removal

《环境科学与工程前沿（英文）》 2022年第16卷第8期 doi: 10.1007/s11783-022-1522-y

摘要：

• Simultaneous C & N removal in Methammox occurs at wide C:N ratio.

关键词： Methanogens Biological Nitrogen Removal (BNR) Simultaneous Methammox C:N ratio

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TIN2015-65515-C4-1-R) A preliminary version was presented at the 13th International

JULIAN,C. CARRASCOSA

《信息与电子工程前沿（英文）》 2016年第17卷第4期页码 325-337 doi: 10.1631/FITEE.1500343

摘要： Human-agent societies refer to applications where virtual agents and humans coexist and interact transparently into a fully integrated environment. One of the most important aspects in this kind of applications is including emotional states of the agents (humans or not) in the decision-making process. In this sense, this paper presents the applicability of the JaCalIVE (Jason Cartago implemented intelligent virtual environment) framework for developing this kind of society. Specifically, the paper presents an ambient intelligence application where humans are immersed into a system that extracts and analyzes the emotional state of a human group. A social emotional model is employed to try to maximize the welfare of those humans by playing the most appropriate music in every moment.

关键词： Multi-agent systems Virtual environments Emotional agents

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Design and analysis of a class of redundant collaborative manipulators with 2-dimension large rotational

Xiaodong JIN, Yuefa FANG, Dan ZHANG, Xueling LUO

《机械工程前沿（英文）》 2020年第15卷第1期页码 66-80 doi: 10.1007/s11465-019-0570-x

摘要： The parallel spindle heads with high rotational capability are demanded in the area of multi-axis machine tools and 3D printers. This paper focuses on designing a class of 2R1T (R: Rotation; T: Translation) parallel spindle heads and the corresponding collaborative 5-axis manipulators with 2-dimension (2D) large rotational angles. In order to construct 2D rotational degrees of freedom (DOF), a platform with 2-dimension revolute joints is proposed first. Based on the constraint screw theory, the feasible limbs that can be connected in the platform are synthesized. In order to provide constant rotational axis for the platform, a class of redundant limbs are designed. A class of redundant 2R1T parallel spindle heads is obtained by connecting the redundant limbs with the platform and the redundant characteristics are verified by the modified Grübler-Kutzbach criterion. The corresponding 5-axis collaborative manipulators are presented by constructing a 2-DOF series translational bottom moving platform. The inverse kinematics and the orientation workspace as well as the decoupling characteristics of this type of 2R1T parallel spindle heads are analyzed. The results show that these manipulators have large 2D rotational angles than the traditional A3/Z3 heads and can be potentially used in the application of multi-axis machine tools and the 3D printers.

关键词： parallel mechanism redundant mechanism large rotational angles machine tools 2R1T spindle head collaborative manipulator