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| 1 | Smoothness-oriented path optimization for robotic milling processes显示文摘Industrial robots are increasingly used for five-axis machining operations, where the rotation of the end effector along the toolaxis direction is functionally redundant. This functional redundancy should be carefully resolved when planning the robot path according to the tool path generated by a computer-aided manufacturing(CAM) system. Improper planning of the redundancy may cause drastic variations of the joint motions, which could significantly decrease the machining efficiency as well as the machining accuracy. To tackle this problem, this paper presents a new optimization-based methodology to globally resolve the functional redundancy for the robotic milling process. Firstly, a global performance index concerning the smoothness of the robot path at the joint acceleration level is proposed. By minimizing the smoothness performance index while considering the avoidance of joint limits and the singularity and the constraint of the stiffness performance, the resolution of the redundancy is formulated as a constrained optimization problem. To efficiently solve the problem, the sequential linearization programming method is employed to improve the initial solution provided by the conventional graph-based method. Then, simulations for a given tool path are presented. Compared with the graph-based method, the proposed method can generate a smoother robot path in which a significant reduction of the magnitude of the maximum joint acceleration is obtained, resulting in a smoother tool-tip feedrate profile. Finally, the experiment on the robotic milling system is also presented. The results show that the optimized robot path of the proposed method obtains better surface quality and higher machining efficiency, which verifies the effectiveness of the proposed method. | PENG JingFu DING Ye ZHANG Gang DING Han | 2020 | Science China(Technological Sciences)2020，63，9： | 4 |
| 2 | Analytical methods and environmental processes of nanoplastics显示文摘The degradation of plastic debris may result in the generation of nanoplastics(NPs).Their high specific surface area for the sorption of organic pollutions and toxic heavy metals and possible transfer between organisms at different nutrient levels make the study of NPs an urgent priority.However,there is very limited understanding on the occurrence,distribution,abundant,and fate of NPs in the environment,partially due to the lack of suitable techniques for the separation and identification of NPs from complex environmental matrices.In this review,we first overviewed the state-of-the-art methods for the extraction,separation,identification and quantification of NPs in the environment.Some of them have been successfully applied for the field determination of NPs,while some are borrowed from the detection of microplastics or engineered nanomaterials.Then the possible fate and transport of NPs in the environment are thoroughly described.Although great efforts have been made during the recent years,large knowledge gaps still exist,such as the relatively high detection limit of existing method failing to detect ultralow masses of NPs in the environment,and spherical polystyrene NP models failing to represent the various compositions of NPs with different irregular shapes,which needs further investigation. | Peng Li Qingcun Li Zhineng Hao Sujuan Yu Jingfu Liu | 2020 | Journal of Environmental Sciences2020，32，8： | 3 |
| 3 | Determination of formaldehyde in shiitake mushroom by ionic liquid-based liquid-phase micro-extraction coupled with liquid chromatography显示文摘 | Liu Jingfu Peng Jinfeng Chi Yuguang | 2005 | Talanta2005，65，： | 1 |
| 4 | Determina- tion of formaldehyde in shiitakemushroom by ionic liquid-based liq- uid-phase microextraction coupled with liquid chromatography 显示文摘 | Liu Jingfu Peng Jinfeng Chi Yuguang Jiang Guibin | 2005 | Talanta2005，65，3： | 1 |
| 5 | Direct determination of chlorophenols in environmental water samples by hollow fiber supported ionic liquid membrane extraction coupled with high-performance liquid chromatography显示文摘 | PENG Jinfeng LIU Jingfu HU Xialin | 2007 | Journal of Chromatography A2007，1139，2： | 1 |
| 6 | Ultrasensitive determination of cadmium in seawater by hollow fiber supported liquid membrane extraction coupled with graphite furnace atomic absorption spectrometry 显示文摘 | PENG Jinfeng LIU Rui LIU Jingfu | 2007 | Spectrochimica Acta Part B2007，62，5： | 1 |
| 7 | Determination of formaldehyde in shiitake mushroom by ionic liquid- based liquid - phase micro - extraction coupled with liquid chromatography 显示文摘 | Liu Jingfu Peng Jinfeng Chi Yuguang | 2005 | Talanta2005，65，： | 1 |
| 8 | Determination of formaldehyde in shiitake mushroom by ionic liquid-based liquid-phase microextraction coupled with liquid chromatography显示文摘 | LIU Jingfu PENG Jinfeng CHI Yuguang | 2005 | Talanta2005，65，3： | 1 |
| 9 | Ionic liquids/water distribution ratios of some polyclic aromatic hydrocarbons 显示文摘 | Liu Jingfu Chi Y G Peng J F Jiang G B Jonsson J A | 2004 | Journal of Chemical Engineering Data2004，49，： | 1 |
| 10 | Determination of formaldehyde in shiitake mushroom by ionic liquid-based liquid-phase microextraction coupled with liquid chromatography显示文摘 | LIU Jingfu PENG Jinfeng CHI Yuguang | 2005 | Talanta2005，65，3： | 1 |
| 11 | Determination of formaldehydein shiitake mushroom by ionic liquid-based liquid-phasemicroextraction coupled with liquid chromatography显示文摘 | LIU Jingfu PENG Jinfeng CHI Yuguang | 2005 | Talanta2005，65，3： | 1 |
| 12 | 显示文摘 | PENG Jinfeng LIU Jingfu JIANG Guibin | 1905 | J Chromatogr: A1905，1072，12： | 1 |
| 13 | 显示文摘 | PENG Jinfeng LIU Jingfu HU Xialin | 2007 | J Chromatogr: A2007，1139，2： | 1 |
| 14 | Chromatography A显示文摘 | Peng Jinfeng Liu Jingfu Hu Xialin Jiang Guihin | 2007 | 1139:1652007，1139，： | 1 |
| 15 | Ionic liquid for high temperature headspace liquid-phase microextraction of chlorinated anilines in environmental water samples显示文摘 | PENG Jinfeng LIU Jingfu JIANG Guibin | 2005 | J Chromatogr: A2005，1072，1： | 1 |
| 16 | Direct determi- nation of ehlorophenols in environmental water samples by hollow fiber supported ionic liquid membrane extraction coupled with high performance liquid chromatography 显示文摘 | Peng Jinfeng Liu Jingfu Hu Xialin | 2007 | J Cbromatogr A2007，，2： | 1 |
| 17 | Make U-Net Greater: An Easy-to-Embed Approach to Improve Segmentation Performance Using Hypergraph显示文摘semantics information while maintaining spatial detail con-texts.Long-range context information plays a crucial role in this scenario.How-ever,the traditional convolution kernel only provides the local and small size of the receptivefield.To address the problem,we propose a plug-and-play module aggregating both local and global information(aka LGIA module)to capture the high-order relationship between nodes that are far apart.We incorporate both local and global correlations into hypergraph which is able to capture high-order rela-tionships between nodes via the concept of a hyperedge connecting a subset of nodes.The local correlation considers neighborhood nodes that are spatially adja-cent and similar in the same CNN feature maps of magnetic resonance(MR)image;and the global correlation is searched from a batch of CNN feature maps of MR images in feature space.The influence of these two correlations on seman-tic segmentation is complementary.We validated our LGIA module on various CNN segmentation models with the cardiac MR images dataset.Experimental results demonstrate that our approach outperformed several baseline models. | Jing Peng Jingfu Yang Chaoyang Xia Xiaojie Li Yanfen Guo Ying Fu Xinlai Chen Zhe Cui | 2022 | Computer Systems Science & Engineering2022，42，7： | 0 |
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