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学者姓名：刘海滨
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摘要 ：
Currently existing credit risk models, e.g., Scoring Card and Extreme Gradient Boosting (XGBoost), usually have requirements for the capacity of modeling samples. The small sample size may result in the adverse outcomes for the trained models which may neither achieve the expected accuracy nor distinguish risks well. On the other hand, data acquisition can be difficult and restricted due to data protection regulations. In view of the above dilemma, this paper applies Generative Adversarial Nets (GAN) to the construction of small and micro enterprises (SMEs) credit risk model, and proposes a novel training method, namely G-XGBoost, based on the XGBoost model. A few batches of real data are selected to train GAN. When the generative network reaches Nash equilibrium, the network is used to generate pseudo data with the same distribution. The pseudo data is then combined with real data to form an amplified sample set. The amplified sample set is used to train XGBoost for credit risk prediction. The feasibility and advantages of the G-XGBoost model are demonstrated by comparing with the XGBoost model.
引用：
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| GB/T 7714 | Li, Jian , Liu, Haibin , Yang, Zhijun et al. A Credit Risk Model with Small Sample Data Based on G-XGBoost [J]. | APPLIED ARTIFICIAL INTELLIGENCE , 2021 . |
| MLA | Li, Jian et al. "A Credit Risk Model with Small Sample Data Based on G-XGBoost" . | APPLIED ARTIFICIAL INTELLIGENCE (2021) . |
| APA | Li, Jian , Liu, Haibin , Yang, Zhijun , Han, Lei . A Credit Risk Model with Small Sample Data Based on G-XGBoost . | APPLIED ARTIFICIAL INTELLIGENCE , 2021 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
导电微粒与弹性体混合所形成的复合材料既能承受较大的形变,又具备压阻效应,是制备柔性应变片、柔性接触传感器的有效方式。本文采用石墨微粒与乳胶混合形成导电高分子复合材料,以溶液喷涂法制备柔性传感薄膜,通过拉伸试验对柔性传感元件的灵敏度、重复性、粘弹性等性能进行测试与建模分析。
关键词 ：
压阻效应 压阻效应 石墨微粒 石墨微粒 粘弹性 粘弹性
引用：
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| GB/T 7714 | 陈颖 , 王朋 , 刘海滨 . 基于石墨/乳胶复合材料的柔性传感性能分析 [C] //北京力学会第二十七届学术年会论文集 . 2021 . |
| MLA | 陈颖 et al. "基于石墨/乳胶复合材料的柔性传感性能分析" 北京力学会第二十七届学术年会论文集 . (2021) . |
| APA | 陈颖 , 王朋 , 刘海滨 . 基于石墨/乳胶复合材料的柔性传感性能分析 北京力学会第二十七届学术年会论文集 . (2021) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Thermal bubble-driven micropumps have the advantages of high reliability, simple structure and simple fabrication process. However, the high temperature of the thermal bubble may damage some biological or chemical properties of the solution. In order to reduce the influence of the high temperature of the thermal bubbles on the pumped liquid, this paper proposes a kind of heat insulation micropump driven by thermal bubbles with induction heating. The thermal bubble and its chamber are designed on one side of the main pumping channel. The high temperature of the thermal bubble is insulated by the liquid in the heat insulation channel, which reduces the influence of the high temperature of the thermal bubble on the pumped liquid. Protypes of the new micropump with heat source insulation were fabricated and experiments were performed on them. The experiments showed that the temperature of the pumped liquid was less than 35 degrees C in the main pumping channel.
关键词 ：
heat source insulation heat source insulation induction heating induction heating microfluidics microfluidics micropump micropump thermal bubble driven thermal bubble driven
引用：
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| GB/T 7714 | Liu, Bendong , Ma, Chenxu , Yang, Jiahui et al. Study on the Heat Source Insulation of a Thermal Bubble-Driven Micropump with Induction Heating [J]. | MICROMACHINES , 2021 , 12 (9) . |
| MLA | Liu, Bendong et al. "Study on the Heat Source Insulation of a Thermal Bubble-Driven Micropump with Induction Heating" . | MICROMACHINES 12 . 9 (2021) . |
| APA | Liu, Bendong , Ma, Chenxu , Yang, Jiahui , Li, Desheng , Liu, Haibin . Study on the Heat Source Insulation of a Thermal Bubble-Driven Micropump with Induction Heating . | MICROMACHINES , 2021 , 12 (9) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The technique of electrical impedance tomography (EIT) has been recognized as a promising method to design tactile sensors with continuous sensing capability over a large area. The mechanism of electrical impedance tomography allows reconstructing tactile information within the sensing area based on measurements made only at the boundary. However, spatial performance of EIT-based tactile sensors has demonstrated location dependency, which severely affects correct interpretation of tactile stimuli. Here, we analyzed the effect of hyperparameter on the spatial performance, in terms of amplitude, size, position error, and shape deformation in the reconstructed images. To obtain uniform sensitivity throughout the entire sensing area, we developed an intensity scaling method to correct reconstructed amplitudes based on simulation studies. A diagonal scaling matrix was developed for a symmetric circular sensing area, and the scaling value were constructed according to the radial positions of the finite elements. The correction method was further evaluated on a compliant EIT-based touch sensor made of polymer filled composites with underlying paddings. We found that the developed method effectively produced a more uniform sensitivity distribution, and improved spatial profiles of shape deformation. The findings shown here help better interpret the strength information of tactile stimuli located at different positions of large area EIT-based sensors.
关键词 ：
Area sensing Area sensing Conductivity Conductivity Electrical impedance tomography Electrical impedance tomography Image reconstruction Image reconstruction impedance tomography impedance tomography intensity correction intensity correction polymer composites polymer composites Sensitivity Sensitivity Sensors Sensors soft sensors soft sensors Strain Strain Tactile sensors Tactile sensors
引用：
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| GB/T 7714 | Chen, Ying , Liu, Haibin . Location-Dependent Performance of Large-Area Piezoresistive Tactile Sensors Based on Electrical Impedance Tomography [J]. | IEEE SENSORS JOURNAL , 2021 , 21 (19) : 21622-21630 . |
| MLA | Chen, Ying et al. "Location-Dependent Performance of Large-Area Piezoresistive Tactile Sensors Based on Electrical Impedance Tomography" . | IEEE SENSORS JOURNAL 21 . 19 (2021) : 21622-21630 . |
| APA | Chen, Ying , Liu, Haibin . Location-Dependent Performance of Large-Area Piezoresistive Tactile Sensors Based on Electrical Impedance Tomography . | IEEE SENSORS JOURNAL , 2021 , 21 (19) , 21622-21630 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明涉及一种摩擦增材一体化设备及加工方法，用于集成工件的增材过程和减材过程。必要的结构设计有摩擦增材部分、微锻部分和减材部分。增材制造部分包括变位机、旋转工作台、旋转工具头、送料装置，用于零件的固相增材制造成形；微锻部分包括锻造设备和电机，用于增加成形零件的致密性、减小内部缺陷、提高力学性能；扫描检测部分包括激光三维扫描仪及三维模型的对比分析软件，用于监测、扫描增材制造后的工件形状，并与目标零件进行对比分析，确定需要减材的区域；所述减材部分包括可以切换车、铣、刨、磨等加工方式的旋转刀库，用于增材后零件的精密加工；所述数控部分用于成形零件的增材‑微锻‑减材过程控制。
引用：
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| GB/T 7714 | 谢瑞山 , 刘海滨 , 史彦超 . 一种摩擦增减材一体化设备及加工方法 : CN202011595892.6[P]. | 2020-12-29 . |
| MLA | 谢瑞山 et al. "一种摩擦增减材一体化设备及加工方法" : CN202011595892.6. | 2020-12-29 . |
| APA | 谢瑞山 , 刘海滨 , 史彦超 . 一种摩擦增减材一体化设备及加工方法 : CN202011595892.6. | 2020-12-29 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
感应加热的相变盲文点显器属于医疗、微驱动器和微机电系统(MEMS)领域，具体采用微加工技术制作的一种利用高频交变电流产生交变磁场，使位于交变磁场的导电相变复合材料产生电涡流和焦耳热，进而相变材料熔化产生体积膨胀，并使腔内的压力增大，促使弹性薄膜向外突出变形推动驱动针向上移动，驱动针使PDMS薄膜变形而形成凸点的相变盲文点显器。该盲文点显器能够集成到便携式设备中，用于帮助视觉障碍者获取信息。
引用：
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| GB/T 7714 | 刘本东 , 马永昌 , 杨佳慧 et al. 感应加热的相变盲文点显器 : CN202010330884.2[P]. | 2020-04-24 . |
| MLA | 刘本东 et al. "感应加热的相变盲文点显器" : CN202010330884.2. | 2020-04-24 . |
| APA | 刘本东 , 马永昌 , 杨佳慧 , 李德胜 , 刘海滨 . 感应加热的相变盲文点显器 : CN202010330884.2. | 2020-04-24 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
It is essential to control concentration gradients at specific locations for many biochemical experiments. This paper proposes a tunable concentration gradient generator actuated by acoustically oscillating bubbles trapped in the bubble channels using a controllable position based on the gas permeability of polydimethylsiloxane (PDMS). The gradient generator consists of a glass substrate, a PDMS chip, and a piezoelectric transducer. When the trapped bubbles are activated by acoustic waves, the solution near the gas-liquid interface is mixed. The volume of the bubbles and the position of the gas-liquid interface are regulated through the permeability of the PDMS wall. The tunable concentration gradient can be realized by changing the numbers and positions of the bubbles that enable the mixing of fluids in the main channel, and the amplitude of the applied voltage. This new device is easy to fabricate, responsive, and biocompatible, and therefore has great application prospects. In particular, it is suitable for biological research with high requirements for temporal controllability.
关键词 ：
acoustically oscillating bubbles acoustically oscillating bubbles concentration gradients concentration gradients polydimethylsiloxane (PDMS) wall polydimethylsiloxane (PDMS) wall temporal controllability temporal controllability
引用：
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| GB/T 7714 | Liu, Bendong , Ma, Zhigao , Yang, Jiahui et al. A Concentration Gradients Tunable Generator with Adjustable Position of the Acoustically Oscillating Bubbles [J]. | MICROMACHINES , 2020 , 11 (9) . |
| MLA | Liu, Bendong et al. "A Concentration Gradients Tunable Generator with Adjustable Position of the Acoustically Oscillating Bubbles" . | MICROMACHINES 11 . 9 (2020) . |
| APA | Liu, Bendong , Ma, Zhigao , Yang, Jiahui , Gao, Guohua , Liu, Haibin . A Concentration Gradients Tunable Generator with Adjustable Position of the Acoustically Oscillating Bubbles . | MICROMACHINES , 2020 , 11 (9) . |
| 导入链接 | NoteExpress RIS BibTex |
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