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Multi-camera systems for rehabilitation therapies: a study of the precision of MicrosoftKinect sensorsversion was presented at the 13th International Conference on Practical Applications of Agents and Multi-Agent

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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多孔径光学成像系统及其光场采集数学模型 Review Article

祁启明,傅瑞罡,邵铮铮,王平,范红旗

《信息与电子工程前沿（英文）》 2022年第23卷第6期页码 823-844 doi: 10.1631/FITEE.2100058

摘要：

受昆虫复眼启发，为提高光学成像质量，如获得高分辨率图像或大视场图像，研究者提出了许多多孔径光学成像系统。光场采集数学模型是联系多孔径光学成像系统结构设计与应用的纽带，但光场采集数学模型较少被关注。本文系统梳理了典型多孔径光学成像系统（仿生复眼、光场相机、相机阵列），总结了不同结构下多孔径光学成像系统的一般性光场采集数学模型。列出的数学模型既可用于计算特定多孔径光学成像系统的关键指标，如视场大小和子图像重叠比等，也可作为数学工具，便于研究者完成对成像系统的定量设计与评估。

关键词：多孔径光学成像系统；仿生复眼；光场相机；相机阵列；光场采集模型

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基于普通器件实现快1000倍的相机与机器视觉 Article

Tiejun Huang, Yajing Zheng, Zhaofei Yu, Rui Chen, Yuan Li, Ruiqin Xiong, Lei Ma, Junwei Zhao, Siwei Dong, Lin Zhu, Jianing Li, Shanshan Jia, Yihua Fu, Boxin Shi, Si Wu, Yonghong Tian

《工程（英文）》 2023年第25卷第6期页码 110-119 doi: 10.1016/j.eng.2022.01.012

摘要：

在数码相机中，我们发现了一个重大缺陷，即从胶片相机继承的图像和视频模型阻碍了相机捕捉快速变化的光子世界。我们提出了一种新的视觉形式，称为视象（vform），这是一个比特序列阵列，其中每个比特表示光子的累积是否达到了一个阈值，从而可以记录和重建任何时刻场景的光强。仅使用消费级CMOS传感器和集成电路，开发了一种比传统相机快1000倍的脉冲相机。将视象看作生物视觉中的脉冲序列，进一步开发了基于脉冲神经网络的机器视觉系统，它可以将机器的速度和生物视觉的机理结合起来，从而实现了比人类视觉快1000倍的高速目标检测和跟踪，并通过辅助裁判和目标瞄准系统证明了脉冲相机和超级视觉系统的效用。视象模型和芯片有望从根本上改变图像和视频的概念以及摄影、电影和视觉媒体等相关行业，并开启一个全新的基于脉冲神经网络的速度自由的机器视觉时代。

关键词： Vidar相机脉冲神经网络超级视觉系统全时成像

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适用于大视场红外地球敏感器的相机标定方法 Research Article

邓华健1,2,王昊1,2,韩晓亚3,刘洋1,2,金仲和1,2

《信息与电子工程前沿（英文）》 2023年第24卷第1期页码 141-153 doi: 10.1631/FITEE.2200079

摘要：相机的几何精度不足是制约大视场红外地球敏感器精度提升的主要因素。红外地球敏感器相机超大的视场与中心的盲区极大地限制了传统几何标定方法的准确性与可行性。本文提出并验证了一种新型的适用于红外地球敏感器的相机标定方法。三个红外靶标被用作控制点，而相机被安装于双轴转台上。随着转台的旋转，这些控制点将均匀地分布在整个相机视场中。与传统的平行光管与转台配合方法相比，传统方法无法有效覆盖大视场且需要苛刻的实验设备，而该方法更易于实施且成本较低。本文还提出了相应的三步参数估计算法，从而不需要精确测量相机和控制点的位置。本文用10台红外地球敏感器进行了实验，以验证标定方法的有效性。结果表明，所提出的方法是高度稳定可靠的，标定精度与现有其他方法相比提升至少30%。

关键词：红外地球敏感器；全景红外相机；相机标定

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Technological development of multi-energy complementary system based on solar PVs and MGT

Xiaojing LV, Yu WENG, Xiaoyi DING, Shilie WENG, Yiwu WENG

《能源前沿（英文）》 2018年第12卷第4期页码 509-517 doi: 10.1007/s11708-018-0598-3

摘要：

The complementary micro-energy network system consisting of solar photovoltaic power generation (solar PVs) and micro-gas turbine (MGT), which not only improves the absorption rate and reliability of photovoltaic power, but also has the advantages of low emission, high efficiency, and good fuel adaptability, has become one of the most promising distributed power systems in the field of micro grid. According to the development of current technology and the demand of actual work, this research described the domestic and foreign development of micro-energy network system based on solar PVs and MGT. Moreover, it analyzed the challenges and future development regarding the micro-energy network system in planning and design, energy utilization optimization and dispatching management, and system maintenance, respectively. Furthermore, it predicted the future development of the key technology of the multi-energy complementary system. These results will be beneficial for the progress of this field both in theory and practice.

关键词： renewable energy solar photovoltaic power generation micro gas turbine multi-energy complementary system micro-energy network

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Optimal dispatch of multi energy system using power-to-gas technology considering flexible load on user

Zi LING, Xiu YANG, Zilin LI

《能源前沿（英文）》 2018年第12卷第4期页码 569-581 doi: 10.1007/s11708-018-0595-6

摘要：

The relation between power-to-gas technology (P2G) and energy interconnection becomes increasingly close. Meanwhile, the participation of flexible load on user side in system optimization has attracted much attention as an efficient approach to relieve the contradiction between energy supply and energy demand. Based on the concept of energy hub, according to its series characteristic, this paper established a generic multi-energy system model using the P2G technology. The characteristic of flexible load on user side was considered and optimal dispatch analysis was made, so as to reduce the cost, to reasonably dispatch the flexible load, to reduce the discharge, to enhance the new energy output, and to increase the power-to-gas conversion efficiency. Finally, a concrete analysis was made on the optimal dispatch result of the multi-energy system using the P2G technology considering flexible load on user side in the calculating example, and optimal dispatch of the system was verified via four different scenarios. The results indicate that cooperative dispatch of multi-energy system using the P2G technology considering flexible load on user side is the most economic, and can make a contribution to absorption of new energy and P2G conversion. In this way, environmental effects and safe and stable operation of the system can be guaranteed.

关键词： multi-energy system energy hub series characteristic optimal dispatch flexible load

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Design and calibration of a new high-definition three-dimensional laparoscopic system

Jia TANG,Li-qiang WANG,Bo YUAN,Hong JIANG,Qi-ming ZHU

《信息与电子工程前沿（英文）》 2015年第16卷第1期页码 79-84 doi: 10.1631/FITEE.1400149

摘要： We present a high-definition (HD) 3D laparoscopic system including a dual channel optical system, two cameras, a camera control unit (CCU), and an HD 3D monitor. This laparoscopic system is capable of outputting dual high-definition videos and providing vivid 3D images. A modified pinhole camera model is used for camera calibration and a new method of depth measurement to improve precision. The average error of depth measurement measured by experiment (about 1.13 mm) was small in proportion to the large range in distance of the system (10-150 mm). The new method is applicable to any calibrated binocular vision system.

关键词： Dual optical channels Three dimensional Camera calibration Pinhole model Depth measurement Laparoscopic system

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Research and implementation of flexible coding system oriented multi-view

ZHANG Xuhui, ZHANG Xu, NING Ruxin

《机械工程前沿（英文）》 2007年第2卷第4期页码 448-452 doi: 10.1007/s11465-007-0077-8

摘要： On the basis of the requirements of a product data management system (PDM) for the flexible coding system, the principle of the flexible coding system oriented multi-view is analyzed. Generation and utilization of coding should be associated with the context of the object. The architecture of the flexible coding system oriented multi-view is studied and the implementation class diagram of the system is designed. The system can support the establishment of five types of code segments, provide the tools of flexible defining coding rules and drive the automatic generation of object coding in different views (contexts). On the foundation of the characteristics of the system, coding for parts is taken as a sample to validate and elaborate the flexible coding process of the system.

关键词： foundation different management utilization Generation

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Dymola-based multi-parameters integrated optimization for high speed transfer system of LED chip sorter

Jie OUYANG, Bin LI, Shihua GONG

《机械工程前沿（英文）》 2013年第8卷第2期页码 118-126 doi: 10.1007/s11465-013-0253-y

摘要：

To enhance the performance of high speed transfer system of LED chip sorting equipment, its control parameters need to be well matching with the mechanical system. In practical issues, it is difficult and time-consuming work to get these parameters matched because their selection is strongly depended on individuals. In current work, an integrated optimization method was carried out to solve this problem, in which the multiple control parameters optimization, modeling and simulation were included, i.e., a multi-domain model of transfer system performed on Dymola platform. Based on this model, the searching area of the key control parameters was narrowed by performing integrated optimization. After that a group of parameters were selected from this narrowed area to perform the equipment’s controls. The result showed this method possesses a simple and reliable nature. The optimal solutions also indicated that the optimized control parameters can well satisfy the requirements of transfer system. On the other hand, it greatly reduced the engineering adjustment time by using this method.

关键词： LED chip sorter multi-domain modeling and simulation parameter optimization modelica language

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采用飞行时间相机的瞬态成像及其应用

Jing-yu Lin, Ri-hui Wu, Hong-man Wang, Ye-bin Liu,jylin@gxu.edu.cn,liuyebin@tsinghua.edu.cn

《信息与电子工程前沿（英文）》 2017年第18卷第9期页码 1268-1276 doi: 10.1631/FITEE.1700556

摘要：概要：瞬态成像是一种记录光从开始照射直到稳定状态全过程的摄像技术，这使得光速量级的事件可以被观测。介绍了采用飞行时间（time-of-flight, ToF）相机进行瞬态成像的三种数学模型，即相关函数模型、频域模型和压缩感知模型。瞬态图像应用主要基于光传输解析和不同光路光线分离。讨论了两种应用，即对散射介质内的物体进行成像和恢复被拐角遮挡物体的形状和纹理。

关键词：瞬态成像；飞行时间（time-of-flight ToF）；散射介质；拐角遮挡

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Identification of thermal error in a feed system based on multi-class LS-SVM

Chao JIN, Bo WU, Youmin HU, Yao CHENG

《机械工程前沿（英文）》 2012年第7卷第1期页码 47-54 doi: 10.1007/s11465-012-0307-6

摘要：

Research of thermal characteristics has been a key issue in the development of high-speed feed system. The thermal positioning error of a ball-screw is one of the most important objects to consider for high-accuracy and high-speed machine tools. The research work undertaken herein ultimately aims at the development of a comprehensive thermal error identification model with high accuracy and robust. Using multi-class least squares support vector machines (LS-SVM), the thermal positioning error of the feed system is identified with the variance and mean square value of the temperatures of supporting bearings and screw-nut as feature vector. A series of experiments were carried out on a self-made quasi high-speed feed system experimental bench HUST-FS-001 to verify the identification capacity of the presented method. The results show that the recommended model can be used to predict the thermal error of a feed system with good accuracy, which is better than the ordinary BP and RBF neural network. The work described in this paper lays a solid foundation of thermal error prediction and compensation in a feed system.

关键词： least squares support vector machine (LS-SVM) feed system thermal error precision machining

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复杂信息系统构建的新方法——多活性代理方法

王越

《中国工程科学》 2006年第8卷第5期页码 29-32

摘要：在分析复杂信息系统的基础上，以系统理论为指导，借用多代理技术的思想，针对强对抗、强约束条件下复杂信息系统的特点，提出了复杂信息系统构建的一种新方法——多活性代理方法（MLAM, multi

关键词：多活性代理方法复杂信息系统系统理论

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Impact of wind power generating system integration on frequency stabilization in multi-area power system

Y. K. BHATESHVAR,H. D. MATHUR,H. SIGUERDIDJANE

《能源前沿（英文）》 2015年第9卷第1期页码 7-21 doi: 10.1007/s11708-014-0338-2

摘要： Among the available options for renewable energy integration in existing power system, wind power is being considered as one of the suited options for future electrical power generation. The major constraint of wind power generating system (WPGS) is that it does not provide inertial support because of power electronic converters between the grid and the WPGS to facilitate frequency stabilization. The proposed control strategy suggests a substantial contribution to system inertia in terms of short-term active power support in a two area restructured power system. The control scheme uses fuzzy logic based design and takes frequency deviation as input to provide quick active power support, which balances the drop in frequency and tie-line power during transient conditions. This paper presents a comprehensive study of the wind power impact with increasing wind power penetration on frequency stabilization in restructured power system scenario. Variation of load conditions are also analyzed in simulation studies for the same power system model with the proposed control scheme. Simulation results advocates the justification of control scheme over other schemes.

关键词： two area power system automatic generation control wind power generating system (WPGS) deregulated environment fuzzy logic controller (FLC)

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Multi-axle dynamic steering system of truck-howitzer

LI Yanliang, GAO Xiuhua, ZHANG Chunqiu, SUN Yubo

《机械工程前沿（英文）》 2008年第3卷第1期页码 44-49 doi: 10.1007/s11465-008-0002-9

摘要： A two-degree-of-freedom (2-DOF) steering model of multi-axle vehicle was established. The steering center position, the relationship between the steering angle and the vehicle velocity, and the minimum turn radius were deduced on the basis of the proportional control with a zero sideslip angle. Results indicate that the system stability is decided by the vehicle barycenter position and the lateral stiffness of a tire. Under this control, the steady value of the lateral acceleration is obviously diminished and the yaw angular velocity changes little under any vehicle velocity. The system rapidly responds, the vehicle smoothly steers, and its handling stability is prominently improved.

关键词： multi-axle acceleration relationship smoothly handling stability

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Self-organizing method for collaboration in multi-robot system on basis of balance principle

DONG Yangbin, JIANG Jinping, HE Yan

《机械工程前沿（英文）》 2008年第3卷第3期页码 283-287 doi: 10.1007/s11465-008-0044-z

摘要： By analyzing the operation characteristics of two subtasks that have resource dependency on each other, this paper demonstrates the impact of progress relation between the two subtasks on the whole task’s progress, and then puts forward a self-organizing principle called balance principle that keeps the individual profit between robots equal. Furthermore, an algorithm is designed for adjusting subtask selection on the basis of this principle. Simulation shows the validity of the algorithm on self-organizing task allocation in a multi-robot system.

关键词： algorithm self-organizing principle validity Simulation allocation

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标题作者时间类型操作

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

期刊论文

多孔径光学成像系统及其光场采集数学模型

祁启明,傅瑞罡,邵铮铮,王平,范红旗

期刊论文

基于普通器件实现快1000倍的相机与机器视觉

Tiejun Huang, Yajing Zheng, Zhaofei Yu, Rui Chen, Yuan Li, Ruiqin Xiong, Lei Ma, Junwei Zhao, Siwei Dong, Lin Zhu, Jianing Li, Shanshan Jia, Yihua Fu, Boxin Shi, Si Wu, Yonghong Tian

期刊论文

适用于大视场红外地球敏感器的相机标定方法

邓华健1,2,王昊1,2,韩晓亚3,刘洋1,2,金仲和1,2

期刊论文

Technological development of multi-energy complementary system based on solar PVs and MGT

Xiaojing LV, Yu WENG, Xiaoyi DING, Shilie WENG, Yiwu WENG

期刊论文

Optimal dispatch of multi energy system using power-to-gas technology considering flexible load on user

Zi LING, Xiu YANG, Zilin LI

期刊论文

Design and calibration of a new high-definition three-dimensional laparoscopic system

Jia TANG,Li-qiang WANG,Bo YUAN,Hong JIANG,Qi-ming ZHU