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| 1 | Recent Developments of Modulation and Control for High-Power Current-Source-Converters Fed Electric Machine Systems显示文摘The pulse-width-modulated(PWM)current-source converters(CSCs)fed electric machine systems can be considered as a type of high reliability energy conversion systems,since they work with the long-life DC-link inductor and offer high fault-tolerant capability for short-circuit faults.Besides,they provide motor friendly waveforms and four-quadrant operation ability.Therefore,they are suitable for high-power applications of fans,pumps,compressors and wind power generation.The purpose of this paper is to comprehensively review recent developments of key technologies on modulation and control of high-power(HP)PWM-CSC fed electric machines systems,including reduction of low-order current harmonics,suppression of inductor–capacitor(LC)resonance,mitigation of common-mode voltage(CMV)and control of modular PWM-CSC fed systems.In particular,recent work on the overlapping effects during commutation,LC resonance suppression under fault-tolerant operation and collaboration of modular PMW-CSCs are described.Both theoretical analysis and some results in simulations and experiments are presented.Finally,a brief discussion regarding the future trend of the HP CSC fed electric machines systems is presented. | Pengcheng Liu Zheng Wang Sanmin Wei Yuwen Bo Shaoning Pu | 2020 | CES Transactions on Electrical Machines and Systems2020，4，3： | 3 |
| 2 | Promoting polysulfide conversions via cobalt single-atom catalyst for fast and durable lithium-sulfur batteries显示文摘Although promising strategies have been developed to resolve the critical drawbacks of lithium-sulfur(Li-S)batteries,the intractable issues including undesirable shuttling of polysulfides and sluggish redox reaction kinetics have still been unresolved thoroughly.Herein,a cobalt single-atom(CoSA)catalyst comprising of atomic Co distributed homogeneously within nitrogen(N)-doped porous carbon(Co-NPC)nanosphere is constructed and utilized as a separator coating in Li-S batteries.The Co-NPC exposes abundant active sites participating in sulfur redox reactions,and remarkable catalytic activity boosting the rapid polysulfide conversions.As a result,Li-S batteries with Co-NPC coating layer realize significantly enhanced specific capacity(1295 mAh·g^(-1)at 0.2 C),rate capability(753 mAh·g^(-1)at 3.0 C),and long-life cyclic stability(601 mAh·g^(-1)after 500 cycles at 1.0 C).Increasing the areal sulfur loading to 6.2 mg·cm^(-2),an extremely high areal capacity of 7.92 mAh·cm^(-2)is achieved.Further in situ X-ray diffraction,density functional theory calculations,and secondary ion mass spectrometry confirm the high catalytic capability of CoSA towards reversible polysulfide conversion.This study supplies new insights for adopting single-atom catalyst to upgrade the electrochemical performance of Li-S batteries. | Ziwei Wang Yuwen Cheng Shanying Wang Jie Xu Bo Peng Dan Luo Lianbo Ma | 2023 | Nano Research2023，16，7： | 1 |
| 3 | The nuclear bodies formed by histone demethylase KDM7A显示文摘Dear Editor,In the nucleus of higher eukaryotes,chromatin occupies only a small proportion of the nuclear space,while many proteins and RNAs segregate into membrane-less nuclear bodies(NBs).These NBs follow a stochastic or ordered assembly model and constantly exchange components with the surrounding nucleoplasm(Jain et al.,2016). | Hui Ming Qianfeng Wang Yuwen Zhang Luzhang Ji Lu Cheng Xiangru Huo Zixiang Yan Zhexiao Liu Yongjun Dang Bo Wen | 2021 | Protein & Cell2021，12，4： | 0 |
| 4 | 3D printing of functional nerve guide conduits显示文摘Nerve guide conduits(NGCs),as alternatives to nerve autografts and allografts,have been widely explored as an advanced tool for the treatment of peripheral nerve injury.However,the repairing efficiency of NGCs still needs significant improvements.Functional NGCs that provide a more favorable microenvironment for promoting axonal elongation and myelination are of great importance.In recent years,3D printing technologies have been widely applied in the fabrication of customized and complex constructs,exhibiting great potential for tissue engineering applications,especially for the construction of functional NGCs.In this review,we introduce the 3D printing technologies for manufacturing functional NGCs,including inkjet printing,extrusion printing,stereolithographybased printing and indirect printing.Further,we summarize the current methods and strategies for constructing functional NGCs,such as designing special conduit architectures,using appropriate materials and co-printing with different biological cues.Finally,the challenges and prospects for construction of functional NGCs are also presented. | Yulan Huang Wenbi Wu Haofan Liu Yuwen Chen Bo Li Zhiyuan Gou Xun Li Maling Gou | 2021 | Burns & Trauma2021，9，1： | 0 |
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