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Yingzhong Tian
Shanghai Key Laboratory of Intelligent Manufacturing and Robotics, School of Automation and Mechanical Engineering, Shanghai University, Shanghai 200072, China

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Journal article
Published: 01 April 2021 in Chemical Physics Letters
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Plasma-enhanced chemical vapor deposition (PECVD) was used to prepare vertically well-aligned carbon nanotube arrays on atomic layer deposition (ALD) of zinc oxide (ZnO) films with acetylene (C2H2) and ammonia (NH3). The mechanisms of their nucleation and initial growth were analyzed on ZnO films, and the activation energy was also calculated to be about 60.7 kJ/mol. Generally, the reactivity of NH2 radicals was higher than that of H2 molecules and H radicals, so the activation energy was lower for the nucleation and initial growth of vertically aligned carbon nanotube arrays (VACNTs) with NH2 radicals, compared with H radicals and H2 molecules.

ACS Style

Guangjie Yuan; Zhenhua Liu; Zhipeng Cao; Jiefei Xie; Haohao Li; Long Li; Yueli Sun; Yingzhong Tian. Direct growth of vertically well-aligned carbon nanotube arrays on atomic layer deposition of ZnO films. Chemical Physics Letters 2021, 773, 138602 .

AMA Style

Guangjie Yuan, Zhenhua Liu, Zhipeng Cao, Jiefei Xie, Haohao Li, Long Li, Yueli Sun, Yingzhong Tian. Direct growth of vertically well-aligned carbon nanotube arrays on atomic layer deposition of ZnO films. Chemical Physics Letters. 2021; 773 ():138602.

Chicago/Turabian Style

Guangjie Yuan; Zhenhua Liu; Zhipeng Cao; Jiefei Xie; Haohao Li; Long Li; Yueli Sun; Yingzhong Tian. 2021. "Direct growth of vertically well-aligned carbon nanotube arrays on atomic layer deposition of ZnO films." Chemical Physics Letters 773, no. : 138602.

Journal article
Published: 23 October 2020 in Nature Communications
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Designing efficient sensors for soft robotics aiming at human machine interaction remains a challenge. Here, we report a smart soft-robotic gripper system based on triboelectric nanogenerator sensors to capture the continuous motion and tactile information for soft gripper. With the special distributed electrodes, the tactile sensor can perceive the contact position and area of external stimuli. The gear-based length sensor with a stretchable strip allows the continuous detection of elongation via the sequential contact of each tooth. The triboelectric sensory information collected during the operation of soft gripper is further trained by support vector machine algorithm to identify diverse objects with an accuracy of 98.1%. Demonstration of digital twin applications, which show the object identification and duplicate robotic manipulation in virtual environment according to the real-time operation of the soft-robotic gripper system, is successfully created for virtual assembly lines and unmanned warehouse applications.

ACS Style

Tao Jin; Zhongda Sun; Long Li; Quan Zhang; Minglu Zhu; Zixuan Zhang; Guangjie Yuan; Tao Chen; Yingzhong Tian; Xuyan Hou; Chengkuo Lee. Triboelectric nanogenerator sensors for soft robotics aiming at digital twin applications. Nature Communications 2020, 11, 1 -12.

AMA Style

Tao Jin, Zhongda Sun, Long Li, Quan Zhang, Minglu Zhu, Zixuan Zhang, Guangjie Yuan, Tao Chen, Yingzhong Tian, Xuyan Hou, Chengkuo Lee. Triboelectric nanogenerator sensors for soft robotics aiming at digital twin applications. Nature Communications. 2020; 11 (1):1-12.

Chicago/Turabian Style

Tao Jin; Zhongda Sun; Long Li; Quan Zhang; Minglu Zhu; Zixuan Zhang; Guangjie Yuan; Tao Chen; Yingzhong Tian; Xuyan Hou; Chengkuo Lee. 2020. "Triboelectric nanogenerator sensors for soft robotics aiming at digital twin applications." Nature Communications 11, no. 1: 1-12.

Journal article
Published: 13 October 2020 in Optics & Laser Technology
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The inhomogeneous microstructure and fatigue crack propagation of 30 mm thick-section high strength steel welded joint by double-sided hybrid fiber laser-arc welding were investigated in detail. The results indicated that the average effective grain size of the laser zone was only 1/2 of that of the arc zone, due to the faster cooling rate of the laser resource. The base metal consisted of massive polygonal ferrites and small granular carbides, while fine grained region, the coarse grained region and weld metal were all composed of martensite with a high dislocation density. Compared with the arc zone, the percentage of grain boundaries with high misorientation angle increased 24% for the laser zone, as the average grain size of the laser zone was smaller than that of the arc zone. The results also revealed that the fatigue crack propagation resistance of the welded joint was higher than that of the base metal. Meanwhile, a significant increase in the fatigue crack propagation resistance of the laser zone occurred, as compared with the arc zone, due to the refined grains and the high proportion of the grain boundaries with high misorientation angle (>15°) in the laser zone.

ACS Style

Jiecai Feng; Liqun Li; Yanbin Chen; Yingzhong Tian; Yongle Sun; Xuanjun Zhang; Jie Zhang. Inhomogeneous microstructure and fatigue crack propagation of thick-section high strength steel joint welded using double-sided hybrid fiber laser-arc welding. Optics & Laser Technology 2020, 134, 106668 .

AMA Style

Jiecai Feng, Liqun Li, Yanbin Chen, Yingzhong Tian, Yongle Sun, Xuanjun Zhang, Jie Zhang. Inhomogeneous microstructure and fatigue crack propagation of thick-section high strength steel joint welded using double-sided hybrid fiber laser-arc welding. Optics & Laser Technology. 2020; 134 ():106668.

Chicago/Turabian Style

Jiecai Feng; Liqun Li; Yanbin Chen; Yingzhong Tian; Yongle Sun; Xuanjun Zhang; Jie Zhang. 2020. "Inhomogeneous microstructure and fatigue crack propagation of thick-section high strength steel joint welded using double-sided hybrid fiber laser-arc welding." Optics & Laser Technology 134, no. : 106668.

Accepted manuscript
Published: 01 April 2020 in Smart Materials and Structures
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Twisted and coiled polymer actuator (TCPA), manufactured from low-cost material such as fishing line, has been widely applied and playing a significant role in soft robotic. Therefore, it is not surprising that it has been attracting much attention of researchers. The main consideration for driving TCPA lies in the heating process. However, the heating process causes stiffness degradation and precisely leads its structural to be unstable. Accordingly, it is proposed through this paper, a method of adjusting the pre-stretching to reach the saturated contraction. The pre-stretch is adjusted to bring the TCPA to saturated contraction within the given heat. Due to the contact of adjacent coils of TCPA, there is not enough space to contract, thus TCPA is compressed into the hard structure by increasing the heat. Initially, the stiffness will be decreased and then be increased during the entire heating process. So the flexibility of the motion state and the stability working state can be achieved. Besides that, the proposed method can also improve the rigor of TCPA by more than two times during saturated contraction. It has been shown by some relevant results of a custom platform experiment.

ACS Style

Long Li; Wenke Ma; Quan Zhang; Guangjie Yuan; Hua Li; Yingzhong Tian. Research on the mechanism of variable stiffness of the twisted and coiled polymer actuator during saturated contraction. Smart Materials and Structures 2020, 29, 065014 .

AMA Style

Long Li, Wenke Ma, Quan Zhang, Guangjie Yuan, Hua Li, Yingzhong Tian. Research on the mechanism of variable stiffness of the twisted and coiled polymer actuator during saturated contraction. Smart Materials and Structures. 2020; 29 (6):065014.

Chicago/Turabian Style

Long Li; Wenke Ma; Quan Zhang; Guangjie Yuan; Hua Li; Yingzhong Tian. 2020. "Research on the mechanism of variable stiffness of the twisted and coiled polymer actuator during saturated contraction." Smart Materials and Structures 29, no. 6: 065014.

Journal article
Published: 21 March 2020 in Applied Sciences
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Visual object trackers based on correlation filters have recently demonstrated substantial robustness to challenging conditions with variations in illumination and motion blur. Nonetheless, the models depend strongly on the spatial layout and are highly sensitive to deformation, scale, and occlusion. As presented and discussed in this paper, the colour attributes are combined due to their complementary characteristics to handle variations in shape well. In addition, a novel approach for robust scale estimation is proposed for mitigatinge the problems caused by fast motion and scale variations. Moreover, feedback from high-confidence tracking results was also utilized to prevent model corruption. The evaluation results for our tracker demonstrate that it performed outstandingly in terms of both precision and accuracy with enhancements of approximately 25% and 49%, respectively, in authoritative benchmarks compared to those for other popular correlation- filter-based trackers. Finally, the proposed tracker has demonstrated strong robustness, which has enabled online object tracking under various scenarios at a real-time frame rate of approximately 65 frames per second (FPS).

ACS Style

Wenbin Wang; Chao Liu; Bo Xu; Long Li; Wei Chen; Yingzhong Tian. Robust Visual Tracking Based on Fusional Multi-Correlation-Filters with a High-Confidence Judgement Mechanism. Applied Sciences 2020, 10, 2151 .

AMA Style

Wenbin Wang, Chao Liu, Bo Xu, Long Li, Wei Chen, Yingzhong Tian. Robust Visual Tracking Based on Fusional Multi-Correlation-Filters with a High-Confidence Judgement Mechanism. Applied Sciences. 2020; 10 (6):2151.

Chicago/Turabian Style

Wenbin Wang; Chao Liu; Bo Xu; Long Li; Wei Chen; Yingzhong Tian. 2020. "Robust Visual Tracking Based on Fusional Multi-Correlation-Filters with a High-Confidence Judgement Mechanism." Applied Sciences 10, no. 6: 2151.

Journal article
Published: 10 January 2020 in Materials
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Thermally reduced graphene oxide/carbon nanotube (rGO/CNT) composite films were successfully prepared by a high-temperature annealing process. Their microstructure, thermal conductivity and mechanical properties were systematically studied at different annealing temperatures. As the annealing temperature increased, more oxygen-containing functional groups were removed from the composite film, and the percentage of graphene continuously increased. When the annealing temperature increased from 1100 to 1400 °C, the thermal conductivity of the composite film also continuously increased from 673.9 to 1052.1 W m−1 K−1. Additionally, the Young’s modulus was reduced by 63.6%, and the tensile strength was increased by 81.7%. In addition, the introduction of carbon nanotubes provided through-plane thermal conduction pathways for the composite films, which was beneficial for the improvement of their through-plane thermal conductivity. Furthermore, CNTs apparently improved the mechanical properties of rGO/CNT composite films. Compared with the rGO film, 1 wt% CNTs reduced the Young’s modulus by 93.3% and increased the tensile strength of the rGO/CNT composite film by 60.3%, which could greatly improve its flexibility. Therefore, the rGO/CNT composite films show great potential for application as thermal interface materials (TIMs) due to their high in-plane thermal conductivity and good mechanical properties.

ACS Style

Guang-Jie Yuan; Jie-Fei Xie; Hao-Hao Li; Bo Shan; Xiao-Xin Zhang; Johan Liu; Long Li; Ying-Zhong Tian. Thermally Reduced Graphene Oxide/Carbon Nanotube Composite Films for Thermal Packaging Applications. Materials 2020, 13, 317 .

AMA Style

Guang-Jie Yuan, Jie-Fei Xie, Hao-Hao Li, Bo Shan, Xiao-Xin Zhang, Johan Liu, Long Li, Ying-Zhong Tian. Thermally Reduced Graphene Oxide/Carbon Nanotube Composite Films for Thermal Packaging Applications. Materials. 2020; 13 (2):317.

Chicago/Turabian Style

Guang-Jie Yuan; Jie-Fei Xie; Hao-Hao Li; Bo Shan; Xiao-Xin Zhang; Johan Liu; Long Li; Ying-Zhong Tian. 2020. "Thermally Reduced Graphene Oxide/Carbon Nanotube Composite Films for Thermal Packaging Applications." Materials 13, no. 2: 317.

Review
Published: 01 December 2019 in Coatings
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Vertically aligned carbon nanotube arrays (VACNTs) have many excellent properties and show great potential for various applications. Recently, there has been a desire to grow VACNTs on nonplanar surfaces and synthesize core-sheath-structured VACNT–inorganic hybrids. To achieve this aim, atomic layer deposition (ALD) has been extensively applied, especially due to its atomic-scale thickness controllability and excellent conformality of films on three-dimensional (3D) structures with high aspect ratios. In this paper, the ALD of catalyst thin films for the growth of VACNTs, such as Co3O4, Al2O3, and Fe2O3, was first mentioned. After that, the ALD of thin films for the synthesis of VACNT–inorganic hybrids was also discussed. To highlight the importance of these hybrids, their potential applications in supercapacitors, solar cells, fuel cells, and sensors have also been reviewed.

ACS Style

Guang-Jie Yuan; Jie-Fei Xie; Hao-Hao Li; Hong-Liang Lu; Ying-Zhong Tian. Atomic Layer Deposition of Inorganic Films for the Synthesis of Vertically Aligned Carbon Nanotube Arrays and Their Hybrids. Coatings 2019, 9, 806 .

AMA Style

Guang-Jie Yuan, Jie-Fei Xie, Hao-Hao Li, Hong-Liang Lu, Ying-Zhong Tian. Atomic Layer Deposition of Inorganic Films for the Synthesis of Vertically Aligned Carbon Nanotube Arrays and Their Hybrids. Coatings. 2019; 9 (12):806.

Chicago/Turabian Style

Guang-Jie Yuan; Jie-Fei Xie; Hao-Hao Li; Hong-Liang Lu; Ying-Zhong Tian. 2019. "Atomic Layer Deposition of Inorganic Films for the Synthesis of Vertically Aligned Carbon Nanotube Arrays and Their Hybrids." Coatings 9, no. 12: 806.

Research article
Published: 09 May 2019 in Mathematical Problems in Engineering
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The probability-based filtering method has been extensively used for solving the simultaneous localization and mapping (SLAM) problem. Generally, the standard filter utilizes the system model and prior stochastic information to approximate the posterior state. However, in the real-time situation, the noise statistics properties are relatively unknown, and the system is inaccurately modeled. Thus the filter divergence might occur in the integration system. Moreover, the expected accuracy might be challenging to be reached due to the absence of the responsive time-varying of both the process and measurement noise statistic which naturally can enlarge the uncertainty in the continuous system. Consequently, the traditional strategy needs to be improved aiming to provide an ability to estimate those properties. In order to accomplish this issue, the new adaptive filter is proposed in this paper, termed as an adaptive smooth variable structure filter (ASVSF). Sequentially, the improved SVSF is derived and implemented; the process and measurement noise statistics are estimated by utilizing the maximum a posteriori (MAP) creation and the weighted exponent concept, and the covariance correction step is added based on the divergence suppression concept. In this paper the ASVSF is applied to overcome the SLAM problem of an autonomous mobile robot; henceforth it is abbreviated as an ASVSF-SLAM algorithm. It is simulated and compared to the classical algorithm. The simulation results demonstrated that the proposed algorithm has better performance, stability, and effectiveness.

ACS Style

Yingzhong Tian; Heru Suwoyo; Wenbin Wang; Long Li. An ASVSF-SLAM Algorithm with Time-Varying Noise Statistics Based on MAP Creation and Weighted Exponent. Mathematical Problems in Engineering 2019, 2019, 1 -17.

AMA Style

Yingzhong Tian, Heru Suwoyo, Wenbin Wang, Long Li. An ASVSF-SLAM Algorithm with Time-Varying Noise Statistics Based on MAP Creation and Weighted Exponent. Mathematical Problems in Engineering. 2019; 2019 ():1-17.

Chicago/Turabian Style

Yingzhong Tian; Heru Suwoyo; Wenbin Wang; Long Li. 2019. "An ASVSF-SLAM Algorithm with Time-Varying Noise Statistics Based on MAP Creation and Weighted Exponent." Mathematical Problems in Engineering 2019, no. : 1-17.

Journal article
Published: 08 May 2019 in Sensors
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Iterative closest point (ICP) is a method commonly used to perform scan-matching and registration. To be a simple and robust algorithm, it is still computationally expensive, and it has been regarded as having a crucial challenge especially in a real-time application as used for the simultaneous localization and mapping (SLAM) problem. For these reasons, this paper presents a new method for the acceleration of ICP with an assisted intensity. Unlike the conventional ICP, this method is proposed to reduce the computational cost and avoid divergences. An initial transformation guess is computed with an assisted intensity for their relative rigid-body transformation. Moreover, a target function is proposed to determine the best initial transformation guess based on the statistic of their spatial distances and intensity residuals. Additionally, this method is also proposed to reduce the iteration number. The Anderson acceleration is utilized for increasing the iteration speed which has better ability than the Picard iteration procedure. The proposed algorithm is operated in real time with a single core central processing unit (CPU) thread. Hence, it is suitable for the robot which has limited computation resources. To validate the novelty, this proposed method is evaluated on the SEMANTIC3D.NET benchmark dataset. According to comparative results, the proposed method is declared as having better accuracy and robustness than the conventional ICP methods.

ACS Style

Yingzhong Tian; Xining Liu; Long Li; Wenbin Wang. Intensity-Assisted ICP for Fast Registration of 2D-LIDAR. Sensors 2019, 19, 2124 .

AMA Style

Yingzhong Tian, Xining Liu, Long Li, Wenbin Wang. Intensity-Assisted ICP for Fast Registration of 2D-LIDAR. Sensors. 2019; 19 (9):2124.

Chicago/Turabian Style

Yingzhong Tian; Xining Liu; Long Li; Wenbin Wang. 2019. "Intensity-Assisted ICP for Fast Registration of 2D-LIDAR." Sensors 19, no. 9: 2124.

Journal article
Published: 08 April 2019 in Sensors
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Generative conversational systems consisting of a neural network-based structural model and a linguistic model have always been considered to be an attractive area. However, conversational systems tend to generate single-turn responses with a lack of diversity and informativeness. For this reason, the conversational system method is further developed by modeling and analyzing the joint structural and linguistic model, as presented in the paper. Firstly, we establish a novel dual-encoder structural model based on the new Convolutional Neural Network architecture and strengthened attention with intention. It is able to effectively extract the features of variable-length sequences and then mine their deep semantic information. Secondly, a linguistic model combining the maximum mutual information with the foolish punishment mechanism is proposed. Thirdly, the conversational system for the joint structural and linguistic model is observed and discussed. Then, to validate the effectiveness of the proposed method, some different models are tested, evaluated and compared with respect to Response Coherence, Response Diversity, Length of Conversation and Human Evaluation. As these comparative results show, the proposed method is able to effectively improve the response quality of the generative conversational system.

ACS Style

Yingzhong Tian; Yafei Jia; Long Li; Zongnan Huang; Wenbin Wang. Research on Modeling and Analysis of Generative Conversational System Based on Optimal Joint Structural and Linguistic Model. Sensors 2019, 19, 1675 .

AMA Style

Yingzhong Tian, Yafei Jia, Long Li, Zongnan Huang, Wenbin Wang. Research on Modeling and Analysis of Generative Conversational System Based on Optimal Joint Structural and Linguistic Model. Sensors. 2019; 19 (7):1675.

Chicago/Turabian Style

Yingzhong Tian; Yafei Jia; Long Li; Zongnan Huang; Wenbin Wang. 2019. "Research on Modeling and Analysis of Generative Conversational System Based on Optimal Joint Structural and Linguistic Model." Sensors 19, no. 7: 1675.

Nano express
Published: 02 April 2019 in Nanoscale Research Letters
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Vertically aligned carbon nanotube arrays (VACNTs) show a great potential for various applications, such as thermal interface materials (TIMs). Besides the thermally oxidized SiO2, atomic layer deposition (ALD) was also used to synthesize oxide buffer layers before the deposition of the catalyst, such as Al2O3, TiO2, and ZnO. The growth of VACNTs was found to be largely dependent on different oxide buffer layers, which generally prevented the diffusion of the catalyst into the substrate. Among them, the thickest and densest VACNTs could be achieved on Al2O3, and carbon nanotubes were mostly triple-walled. Besides, the deposition temperature was critical to the growth of VACNTs on Al2O3, and their growth rate obviously reduced above 650 °C, which might be related to the Ostwald ripening of the catalyst nanoparticles or subsurface diffusion of the catalyst. Furthermore, the VACNTs/graphene composite film was prepared as the thermal interface material. The VACNTs and graphene were proved to be the effective vertical and transverse heat transfer pathways in it, respectively.

ACS Style

Hao-Hao Li; Guang-Jie Yuan; Bo Shan; Xiao-Xin Zhang; Hong-Ping Ma; Ying-Zhong Tian; Hong-Liang Lu; Johan Liu. Atomic Layer Deposition of Buffer Layers for the Growth of Vertically Aligned Carbon Nanotube Arrays. Nanoscale Research Letters 2019, 14, 119 .

AMA Style

Hao-Hao Li, Guang-Jie Yuan, Bo Shan, Xiao-Xin Zhang, Hong-Ping Ma, Ying-Zhong Tian, Hong-Liang Lu, Johan Liu. Atomic Layer Deposition of Buffer Layers for the Growth of Vertically Aligned Carbon Nanotube Arrays. Nanoscale Research Letters. 2019; 14 (1):119.

Chicago/Turabian Style

Hao-Hao Li; Guang-Jie Yuan; Bo Shan; Xiao-Xin Zhang; Hong-Ping Ma; Ying-Zhong Tian; Hong-Liang Lu; Johan Liu. 2019. "Atomic Layer Deposition of Buffer Layers for the Growth of Vertically Aligned Carbon Nanotube Arrays." Nanoscale Research Letters 14, no. 1: 119.

Nano express
Published: 21 March 2019 in Nanoscale Research Letters
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Vertically aligned carbon nanotubes (VACNTs) were synthesized on different oxide buffer layers using chemical vapor deposition (CVD). The growth of the VACNTs was mainly determined by three factors: the Ostwald ripening of catalyst nanoparticles, subsurface diffusion of Fe, and their activation energy for nucleation and initial growth. The surface roughness of buffer layers largely influenced the diameter and density of catalyst nanoparticles after annealing, which apparently affected the lifetime of the nanoparticles and the thickness of the prepared VACNTs. In addition, the growth of the VACNTs was also affected by the deposition temperature, and the lifetime of the catalyst nanoparticles apparently decreased when the deposition temperature was greater than 600 °C due to their serious Ostwald ripening. Furthermore, in addition to the number of catalyst nanoparticles, the density of the VACNTs was also largely dependent on their activation energy for nucleation and initial growth.

ACS Style

Haohao Li; Guangjie Yuan; Bo Shan; Xiaoxin Zhang; Hongping Ma; Yingzhong Tian; Hongliang Lu; Johan Liu. Chemical Vapor Deposition of Vertically Aligned Carbon Nanotube Arrays: Critical Effects of Oxide Buffer Layers. Nanoscale Research Letters 2019, 14, 106 .

AMA Style

Haohao Li, Guangjie Yuan, Bo Shan, Xiaoxin Zhang, Hongping Ma, Yingzhong Tian, Hongliang Lu, Johan Liu. Chemical Vapor Deposition of Vertically Aligned Carbon Nanotube Arrays: Critical Effects of Oxide Buffer Layers. Nanoscale Research Letters. 2019; 14 (1):106.

Chicago/Turabian Style

Haohao Li; Guangjie Yuan; Bo Shan; Xiaoxin Zhang; Hongping Ma; Yingzhong Tian; Hongliang Lu; Johan Liu. 2019. "Chemical Vapor Deposition of Vertically Aligned Carbon Nanotube Arrays: Critical Effects of Oxide Buffer Layers." Nanoscale Research Letters 14, no. 1: 106.

Journal article
Published: 14 January 2019 in Applied Sciences
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This paper proposes a solution to the simulated deformation of guidewires when they come in contact with the blood vessel in an interventional surgery simulation training system. Starting from the principle of minimum energy, the guidewire is evenly dispersed into a rigid light bar articulation model. A sequential quadratic programming (SQP) algorithm is used to nonlinearly optimize the deflection angle of each light bar. When the elastic potential energy of the guidewire reaches a minimum, we can get the guidewire deformation we want to solve. The method proposed in this paper avoids necessity of delving into contact deformation caused by the contact force between the guidewire and the blood vessel wall, while solving the problem of the deformation of the guidewire due to the pose of the contact points. We use an ABAQUS (finite element software) simulation to verify that this solution has a theoretical simulation accuracy of 5.11%, and the designed experiments prove that the actual simulation accuracy is about 11%. Moreover, we also simulated the bending stress state of the guidewire by using the deflection angle of each bar. In addition, in order to achieve the most suitable simulation results, we discuss the discrete density of the guidewire model from the perspective of algorithm time consumption and simulation accuracy.

ACS Style

Long Li; Qijun Tang; Yingzhong Tian; Wenbin Wang; Wei Chen; Fengfeng Xi. Investigation of Guidewire Deformation in Blood Vessels Based on an SQP Algorithm. Applied Sciences 2019, 9, 280 .

AMA Style

Long Li, Qijun Tang, Yingzhong Tian, Wenbin Wang, Wei Chen, Fengfeng Xi. Investigation of Guidewire Deformation in Blood Vessels Based on an SQP Algorithm. Applied Sciences. 2019; 9 (2):280.

Chicago/Turabian Style

Long Li; Qijun Tang; Yingzhong Tian; Wenbin Wang; Wei Chen; Fengfeng Xi. 2019. "Investigation of Guidewire Deformation in Blood Vessels Based on an SQP Algorithm." Applied Sciences 9, no. 2: 280.

Journal article
Published: 08 May 2018 in Applied Optics
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In the multifocus microscopic image measurement method, the distortion of the three-dimensional (3D) reconstruction model has always been an important factor affecting the measurement result. In spatial domains, the focus measure algorithm is based on the gradient change of the pixel point to determine the degree of focus of the pixel. So it will be difficult to accurately extract the focus of the pixel in the areas where color difference is not obvious, resulting in 3D model distortion. According to the optical principle, the high-frequency coefficients of the clear image are larger than the high-frequency coefficients of the blurred image. Based on this characteristic, this paper proposes a new multifocus microscopic image 3D reconstruction algorithm using a nonsubsampled wavelet transform (NSWT). The NSWT does not consider the downsampling in wavelet decomposition and has translational invariance. Therefore, the wavelet transform value of each pixel can be calculated in the image, so the high-frequency coefficient of each pixel can be obtained; then the convolution calculation is performed on the high-frequency coefficients of the pixel points in the fixed window as the focus measure value of the pixel point. Compared with the traditional algorithm, the algorithm proposed in this paper can show better unimodal and antinoise performance on the focusing measure curve. In this paper, the reconstruction of the experimental object is Alicona standard block triangular and semicylindrical. The proposed algorithm and the traditional algorithm for comprehensive measure use the root mean square error, peak signal to noise ratio, and correlation coefficient as the measure index. The experimental results and comparative analysis prove the correctness of the proposed algorithm and enable more accurate reconstruction of 3D models based on multifocus microscopic images.

ACS Style

Yingzhong Tian; Haoyang Cui; Zhiyan Pan; Jiaorong Liu; Shouchen Yang; Lilan Liu; Wenbin Wang; Long Li. Improved three-dimensional reconstruction algorithm from a multifocus microscopic image sequence based on a nonsubsampled wavelet transform. Applied Optics 2018, 57, 3864 -3872.

AMA Style

Yingzhong Tian, Haoyang Cui, Zhiyan Pan, Jiaorong Liu, Shouchen Yang, Lilan Liu, Wenbin Wang, Long Li. Improved three-dimensional reconstruction algorithm from a multifocus microscopic image sequence based on a nonsubsampled wavelet transform. Applied Optics. 2018; 57 (14):3864-3872.

Chicago/Turabian Style

Yingzhong Tian; Haoyang Cui; Zhiyan Pan; Jiaorong Liu; Shouchen Yang; Lilan Liu; Wenbin Wang; Long Li. 2018. "Improved three-dimensional reconstruction algorithm from a multifocus microscopic image sequence based on a nonsubsampled wavelet transform." Applied Optics 57, no. 14: 3864-3872.

Conference paper
Published: 01 May 2018 in 2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA)
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Lidars are commonly employed in mobile robot SLAM applications due to their high stability and high measuring accuracy. For a conventional 2D Lidar, only the planar points can be detected in once scan, which limits the robustness of SLAM algorithms. Omni-directional mobile robots with powered caster wheels have 3-DOF planar motion capabilities so that they are widely deployed in narrowly constrained environment. This paper presents a novel design of a 2.5D Lidar device, in which a 2D Lidar is mounted onto a 1-DOF liner stage that moves along the vertical direction. As a result, the 2.5D Lidar device can also perform vertical scanning within the motion range of the liner stage. Consequently, a robust SLAM algorithm based on the 2.5D Lidar device is proposed for the omni-directional mobile robot, where a frame-to-frame scan matching using ICP algorithm is employed to improve the robustness and accuracy of the scan matching. As the 2.5D points cloud is actually located in a belt-shaped space, the map can be finally constructed in a 2D mode to reduce the computational complexity. In addition, when an incorrect matching occurs, the odometry information of the mobile robot will be employed to further improve the robustness and accuracy of the scan matching algorithm. The effectiveness of the proposed approach is validated through computer simulations.

ACS Style

Yu Yang; Guilin Yang; Yingzhong Tian; Tianjiang Zheng; Long Li; Zhenhua Wang. A robust and accurate SLAM algorithm for omni-directional mobile robots based on a novel 2.5D lidar device. 2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA) 2018, 2123 -2127.

AMA Style

Yu Yang, Guilin Yang, Yingzhong Tian, Tianjiang Zheng, Long Li, Zhenhua Wang. A robust and accurate SLAM algorithm for omni-directional mobile robots based on a novel 2.5D lidar device. 2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA). 2018; ():2123-2127.

Chicago/Turabian Style

Yu Yang; Guilin Yang; Yingzhong Tian; Tianjiang Zheng; Long Li; Zhenhua Wang. 2018. "A robust and accurate SLAM algorithm for omni-directional mobile robots based on a novel 2.5D lidar device." 2018 13th IEEE Conference on Industrial Electronics and Applications (ICIEA) , no. : 2123-2127.

Journal article
Published: 05 January 2018 in Energies
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This paper presents a control strategy to improve the output power for a single-cylinder two-stroke free-piston linear generator (FPLG). The comprehensive simulation model of this FPLG is established and the operation principle is introduced. The factors that affect the output power are analyzed theoretically. The characteristics of the piston motion are studied. Considering the different features of the piston motion respectively in acceleration and deceleration phases, a ladder-like electromagnetic force control strategy is proposed. According to the status of the linear electric machine, the reference profile of the electromagnetic force is divided into four ladder-like stages during one motion cycle. The piston motions, especially the dead center errors, are controlled by regulating the profile of the electromagnetic force. The feasibility and advantage of the proposed control strategy are verified through comparison analyses with two conventional control strategies via MatLab/Simulink. The results state that the proposed control strategy can improve the output power by around 7–10% with the same fuel cycle mass.

ACS Style

Chi Zhang; Feixue Chen; Long Li; Zhaoping Xu; Liang Liu; Guilin Yang; Hongyuan Lian; Yingzhong Tian. A Free-Piston Linear Generator Control Strategy for Improving Output Power. Energies 2018, 11, 135 .

AMA Style

Chi Zhang, Feixue Chen, Long Li, Zhaoping Xu, Liang Liu, Guilin Yang, Hongyuan Lian, Yingzhong Tian. A Free-Piston Linear Generator Control Strategy for Improving Output Power. Energies. 2018; 11 (1):135.

Chicago/Turabian Style

Chi Zhang; Feixue Chen; Long Li; Zhaoping Xu; Liang Liu; Guilin Yang; Hongyuan Lian; Yingzhong Tian. 2018. "A Free-Piston Linear Generator Control Strategy for Improving Output Power." Energies 11, no. 1: 135.

Journal article
Published: 01 January 2018 in Journal of Advanced Mechanical Design, Systems, and Manufacturing
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ACS Style

Yingzhong Tian; Liangchao Xu; Jiaorong Liu; Wenbin Wang; Lilan Liu; Zhiming Xu; Long Li. Research on motion signal capture accuracy of master manipulator for vascular interventional robot. Journal of Advanced Mechanical Design, Systems, and Manufacturing 2018, 12, JAMDSM0030 -JAMDSM0030.

AMA Style

Yingzhong Tian, Liangchao Xu, Jiaorong Liu, Wenbin Wang, Lilan Liu, Zhiming Xu, Long Li. Research on motion signal capture accuracy of master manipulator for vascular interventional robot. Journal of Advanced Mechanical Design, Systems, and Manufacturing. 2018; 12 (1):JAMDSM0030-JAMDSM0030.

Chicago/Turabian Style

Yingzhong Tian; Liangchao Xu; Jiaorong Liu; Wenbin Wang; Lilan Liu; Zhiming Xu; Long Li. 2018. "Research on motion signal capture accuracy of master manipulator for vascular interventional robot." Journal of Advanced Mechanical Design, Systems, and Manufacturing 12, no. 1: JAMDSM0030-JAMDSM0030.

Conference paper
Published: 01 November 2017 in 2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM)
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In this paper we proposed a lidar feature extraction method based on range measurement points from a novel designed 2.5-Dimensions lidar platform. For a conventional 2D laser scanner, only the planar information can be detected in once scan. In order to get more spatial information about the indoor(rectilinear) environment, a novel 2.5D lidar platform is designed by driving a 2D laser scanner up-and-down vibrating in a short distance using a voice coil motor. Then an effective feature extraction method is formulated based on the 2.5D laser point data. Compared with traditional method, these laser points are actually located in 3D environment that resulting the extracted data actually are strip-shaped which include more informations than 2D data. In our experiment, the geometrical features of space edges and surfaces can be extracted accurately, these are useful for the indoor mobile robot localization at the indoor environment. The effectiveness of this approach is validated through experiments on ROS(Robot Operating System).

ACS Style

Yu Yang; Guilin Yang; Tianjiang Zheng; Yingzhong Tian; Long Li. Feature extraction method based on 2.5-dimensions lidar platform for indoor mobile robots localization. 2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM) 2017, 736 -741.

AMA Style

Yu Yang, Guilin Yang, Tianjiang Zheng, Yingzhong Tian, Long Li. Feature extraction method based on 2.5-dimensions lidar platform for indoor mobile robots localization. 2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM). 2017; ():736-741.

Chicago/Turabian Style

Yu Yang; Guilin Yang; Tianjiang Zheng; Yingzhong Tian; Long Li. 2017. "Feature extraction method based on 2.5-dimensions lidar platform for indoor mobile robots localization." 2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM) , no. : 736-741.

Conference paper
Published: 01 November 2017 in 2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM)
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This paper presents a novel control strategy for a single cylinder free-piston linear generator (FPLG) to stabilize the operation process when combustion fluctuation occurs. The FPLG is composed of an internal combustion engine (ICE), a linear Voice Coil Motor (VCM) and a mechanical spring which is assembled between the ICE and the VCM and functions as a rebounding device. When the piston is in expansion stroke, a two-stage control strategy is employed to guarantee the accuracy of bottom dead center (BDC) position of the piston. In compression stroke, a one-stage reference electromagnetic force is enough to control the TDC on account of the accurate control of BDC. The electromagnetic force of the VCM is controlled by the armature current through following the energy balance equation. The dead point position errors, in-cylinder pressure and piston velocity are regard as a feedback to the control loop to regulate electromagnetic force. A simulation model built in MATLAB/Simulink is used to verify the effectiveness of this control strategy. The results validate that this strategy can achieve stable operation with the variation of ±6 mg fuel mass in combustion process. The settling time is less than 0.1s.

ACS Style

Feixue Chen; Chi Zhang; Long Li; Peng Sun; Zhe Jiang; Guanjie Yu; Yingzhong Tian. A novel stable control strategy of single cylinder free-piston linear generator. 2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM) 2017, 587 -592.

AMA Style

Feixue Chen, Chi Zhang, Long Li, Peng Sun, Zhe Jiang, Guanjie Yu, Yingzhong Tian. A novel stable control strategy of single cylinder free-piston linear generator. 2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM). 2017; ():587-592.

Chicago/Turabian Style

Feixue Chen; Chi Zhang; Long Li; Peng Sun; Zhe Jiang; Guanjie Yu; Yingzhong Tian. 2017. "A novel stable control strategy of single cylinder free-piston linear generator." 2017 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM) , no. : 587-592.

Original article
Published: 02 October 2017 in The International Journal of Advanced Manufacturing Technology
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In this paper, we discuss about multiple coordinated robots that can form a fixtureless manufacturing cell. It is very important to ensure that the system stiffness is sufficient for manufacturing operations when external forces are exerted on the system. For this reason, a method is developed to model and analyze the stiffness of a multiple coordinated robot system. In this paper, first, the stiffness of a multiple coordinated robot system is defined. Similar to a single-arm robot, this definition provides us with a criterion to evaluate the stiffness performance of the entire multiple robot system. Second, a static stiffness model is derived including joint stiffness and link stiffness, and then this model is extended to a multiple robot system. Third, the coordinated static stiffness model is validated, and a comparison is made through simulation between a dual robot system and a single robot system. Finally, the developed model is applied to a real coordinated dual-arm robot system for validation.

ACS Style

Yingzhong Tian; Bowen Wang; Jiaorong Liu; Hao Shen; Fengfeng Xi; Long Li. Stiffness modeling and analysis of a multiple coordinated robot system. The International Journal of Advanced Manufacturing Technology 2017, 94, 4265 -4276.

AMA Style

Yingzhong Tian, Bowen Wang, Jiaorong Liu, Hao Shen, Fengfeng Xi, Long Li. Stiffness modeling and analysis of a multiple coordinated robot system. The International Journal of Advanced Manufacturing Technology. 2017; 94 (9-12):4265-4276.

Chicago/Turabian Style

Yingzhong Tian; Bowen Wang; Jiaorong Liu; Hao Shen; Fengfeng Xi; Long Li. 2017. "Stiffness modeling and analysis of a multiple coordinated robot system." The International Journal of Advanced Manufacturing Technology 94, no. 9-12: 4265-4276.