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| 1 | Fractal Design Boosts Extrusion-Based 3D Printing of Bone-Mimicking Radial-Gradient Scaffolds显示文摘Although extrusion-based three-dimensional(EB-3D)printing technique has been widely used in the complex fabrication of bone tissue-engineered scaffolds,a natural bone-like radial-gradient scaffold by this processing method is of huge challenge and still unmet.Inspired by a typical fractal structure of Koch snowflake,for the first time,a fractal-like porous scaffold with a controllable hierarchical gradient in the radial direction is presented via fractal design and then implemented by EB-3D printing.This radial-gradient structure successfully mimics the radially gradual decrease in porosity of natural bone from cancellous bone to cortical bone.First,we create a design-to-fabrication workflow with embedding the graded data on basis of fractal design into digital processing to instruct the extrusion process of fractal-like scaffolds.Further,by a combination of suitable extruded inks,a series of bone-mimicking scaffolds with a 3-iteration fractal-like structure are fabricated to demonstrate their superiority,including radial porosity,mechanical property,and permeability.This study showcases a robust strategy to overcome the limitations of conventional EB-3D printers for the design and fabrication of functionally graded scaffolds,showing great potential in bone tissue engineering. | Huawei Qu Zhenyu Han Zhigang Chen Lan Tang Chongjian Gao Kaizheng Liu Haobo Pan Hongya Fu Changshun Ruan | 2021 | Research2021，，1： | 2 |
| 2 | Bioactive borate glass scaffolds: in vitro and in vivo evaluation for use as a drug delivery system in the treatment of bone infection显示文摘 | Xin Liu Zongping Xie Changqing Zhang Haobo Pan Mohamed N. Rahaman Xin Zhang Qiang Fu Wenhai Huang | 2010 | Journal of Materials Science: Materials in Medicine2010，，2： | 1 |
| 3 | Demand-side Management Based on Model Predictive Control in Distribution Network for Smoothing Distributed Photovoltaic Power Fluctuations显示文摘With the rapid increase of distributed photovoltaic(PV) power integrating into the distribution network(DN), the critical issues such as PV power curtailment and low equipment utilization rate have been caused by PV power fluctuations. DN has less controllable equipment to manage the PV power fluctuation. To smooth the power fluctuations and further improve the utilization of PV, the regulation ability from the demandside needs to be excavated. This study presents a continuous control method of the feeder load power in a DN based on the voltage regulation to respond to the rapid fluctuation of the PV power output. PV power fluctuations will be directly reflected in the point of common coupling(PCC), and the power fluctuation rate of PCCs is an important standard of PV curtailment.Thus, a demand-side management strategy based on model predictive control(MPC) to mitigate the PCC power fluctuation is proposed. In pre-scheduling, the intraday optimization model is established to solve the reference power of PCC. In real-time control, the pre-scheduling results and MPC are used for the rolling optimization to control the feeder load demand. Finally,the data from the field measurements in Guangzhou, China are used to verify the effectiveness of the proposed strategy in smoothing fluctuations of the distributed PV power. | Jian Xu Haobo Fu Siyang Liao Boyu Xie Deping Ke Yuanzhang Sun Xiong Li Xiaotao Peng | 2022 | Journal of Modern Power Systems and Clean Energy2022，10，5： | 1 |
| 4 | The effect of non-storm time substorms on the ring current dynamics显示文摘During geomagnetically active times such as geomagnetic storms,large amounts of energy can be released into the Earth’s magnetosphere and change the ring current intensity.Previous studies showed that significant enhancement of the ring current was related to geomagnetic storms,while few studies have examined substorm effects on ring current dynamics.In this study,we examine the ring current variation during non-storm time(SYM-H>−50 nT)substorms,especially during super-substorms(AE>1000 nT).We perform a statistical analysis of ring current plasma pressure and number flux of various ion species under different substorm conditions,based on Van Allen Probe observations.The plasma pressure and ion fluxes of the ring current increased dramatically during supersubstorms,while little change was observed for substorms with AE<1000 nT.The results shown in this study indicate that a non-storm time super-substorm may also have a significant contribution to the ring current. | EunJin Jang Chao Yue QiuGang Zong SuiYan Fu HaoBo Fu | 2021 | Earth and Planetary Physics2021，5，3： | 1 |
| 5 | Fractal Design Boosts Extrusion-Based 3D Printing of Bone-Mimicking Radial-Gradient Scaffolds显示文摘Although extrusion-based three-dimensional(EB-3D)printing technique has been widely used in the complex fabrication of bone tissue-engineered scaffolds,a natural bone-like radial-gradient scaffold by this processing method is of huge challenge and still unmet.Inspired by a typical fractal structure of Koch snowflake,for the first time,a fractal-like porous scaffold with a controllable hierarchical gradient in the radial direction is presented via fractal design and then implemented by EB-3D printing.This radial-gradient structure successfully mimics the radially gradual decrease in porosity of natural bone from cancellous bone to cortical bone.First,we create a design-to-fabrication workflow with embedding the graded data on basis of fractal design into digital processing to instruct the extrusion process of fractal-like scaffolds.Further,by a combination of suitable extruded inks,a series of bone-mimicking scaffolds with a 3-iteration fractal-like structure are fabricated to demonstrate their superiority,including radial porosity,mechanical property,and permeability.This study showcases a robust strategy to overcome the limitations of conventional EB-3D printers for the design and fabrication of functionally graded scaffolds,showing great potential in bone tissue engineering. | Huawei Qu Zhenyu Han Zhigang Chen Lan Tang Chongjian Gao Kaizheng Liu Haobo Pan Hongya Fu Changshun Ruan | 2022 | Research2022，，1： | 0 |
| 6 | Foldable high-strength electrode enabled by nanosheet subunits for advanced sodium-ion batteries显示文摘Power sources with strong mechanical properties and high-energy density are highly desirable for the next-generation flexible electronics.However,the challenge arises from the current electrode structure design,which is unable to bring both satisfactory mechanical and electrochemical properties with high active materials content and mass.Herein,we reported novel flexible,highstrength,and mechanically stable TiO_(2)-based film electrodes for advanced sodium-ion batteries,achieving an ultrahigh strength(up to≈60 MPa)and commercial-level areal capacity(4.5 mAh cm^(-2)).Highly-dispersed TiO_(2) and interlaced carbon nanotube(CNT)networks are embedded in the sheet-liked cellulose to form porous,high-conductive,and high-active TiO_(2)-C nanosheets that is basic building subunits of TiO_(2)-C films,allowing the films with structural robustness and origami-level flexibility.This strategy reconciles the contradiction between mechanical properties and active material content in flexible electrodes,and the fabricated electrode with a high TiO_(2) content of>65%can be bent more than 11000 times without breaking.Meanwhile,good capacity and excellent cycle stability(0.02‰capacity-decay rate over 9000 cycles)of TiO_(2)-C film under a higher active content(75%)has well satisfied the demands of flexible energy storage devices for electrochemical performances.This TiO_(2)-C subunit assembly methodology demonstrates enormous potential in high-strength/toughness flexible electrode construction for flexible electronics. | Hanwei Wang Jinzhou Fu Chao Wang Ruiwang Zhang Yingying Li Yushan Yang Haobo Li Qingfeng Sun Huiqiao Li | 2022 | InfoMat2022，4，2： | 0 |
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