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| 1 | Architecture design for reliable and reconfigurable FPGA-based GNC computer for deep space exploration显示文摘SRAM(static random access memory)-based FPGA(field programmable gate array), owing to its large capacity, high performance, and dynamical reconfiguration, has become an attractive platform for So PC(system on programmable chip) development. However, as the configuration memory and logic memory of the SRAM-based FPGA are highly susceptible to SEUs(single-event upsets) in deep space, it is a challenge to design and implement a highly reliable FPGA-based system for spacecraft, and no practical architecture has been proposed. In this paper, a new architecture for a reliable and reconfigurable FPGAbased computer in a highly critical GNC(guidance navigation and control) system is proposed. To mitigate the effect of an SEU on the system, multi-layer reconfiguration and multi-layer TMR(triple module redundancy) techniques are proposed, with a reliable reconfigurable real-time operating system(Space OS) managing the system level fault tolerance of the computer in the architecture. The proposed architecture for the reconfigurable FPGA-based computer has been implemented with COTS(commercial off the shelf) FPGA and has firstly been applied to the GNC system of a circumlunar return and reentry flight vehicle. The in-orbit results show that the proposed architecture is capable of meeting the requirements of high reliability and high availability, and can provide the expressive varying functionality and runtime flexibility for an FPGA-based GNC computer in deep space. | YANG MengFei LIU Bo GONG Jian LIU HongJin HU HongKai DONG YangYang SHI Lei ZHAO YunFu MIAO ZhiFu | 2016 | Science China(Technological Sciences)2016，59，2： | 10 |
| 2 | Cross-Scale Synthesis of Organic High-k Semiconductors Based on Spiro-Gridized Nanopolymers显示文摘High dielectric constants in organic semiconductors have been identified as a central challenge for the improvement in not only piexoelectric,preolecric,and freeltric efcts but also photoclecric conversion eficiency in OPVs,carrier mobility in OFETS,and charge density in charge-trapping memories.Herein,we report an ultralong persistence length(≈41 nm)efet of spiro-fused organic nanopolymers on dielectric properties,together with excitonic and charge carrier behaviors.The state-of-the-art nanopolymers,namely,nanopolyspirogrids(NPSGs),are synthesized via the simple crossscale Friedel-Crafts polygridlization of AjB-type nanomonomers.The high dielectric constant(k=8.43)of NPSG is firstly achieved by locking spiro-polygridization efect that results in the enhancement of dipole polarization.When doping into a polystyrene-based dielectric layer,such a high-k feature of NPSG increases the feld-ffct carrier mobility from 0.20 to 0.90cm^(2)Vl s'in pentacene OFET devices.Meanwhile,amorphous NPSG film exhibits an ultralow energy disorder(<50 meV)for an exellent zero-field hole mobility of 3.94×10^(-1)cm^(2)V^(-1)s^(-1).surpassing most of the amorphousπconjugated polymers Onganic nanopolymers with high dielectric constants open a new way to break through the bottleneck of eficiency and multifunctionality in the blueprint of the fourth generation semiconductors. | Dongqing Lin Wenhua Zhang Hang Yin Haixia Hu Yang Li He Zhang Le Wang Xinmiao Xie Hongkai Hu Yongxia Yan Haifeng Ling Jin'an Liu Yue Qian Lei Tang Yongxia Wang Chaoyang Dong Linghai Xie Hao Zhang Shasha Wang Ying Wei Xuefeng Guo Dan Lu Wei Huang | 2022 | Research2022，，2： | 3 |
| 3 | Motion Control of Capsule-like Underwater Robot Utilizing the Swing Properties of Ionic Polymer Metal Composite Actuators显示文摘Ionic Polymer Metal Composite(IPMC)is a novel electrically actuated intelligent material with the advantages of big bending displacement,low driving voltage,flexible and so on.It has been recognized as one of the most attractive actuators with prospective applications for underwater robots and bionic organs.In this work,a capsule-like robot was introduced with the pectoral and caudal fins made of IPMC.By analyzing the properties of displacement response to square waves with different frequencies and low level voltages,it was found that performance of IPMC are frequency sensitive.Besides,when the absolute value of low level voltage decreases,IPMC could swing on one side with the decrease in amplitudes,whereas the amplitude at high level voltage fluctuates within small ranges at low frequencies.IPMC tip can approximately maintain when the frequency of driving signal around 30 Hz.Such properties were employed to control the locomotion of robot combining the motions of pectoral and caudal fin.Thus,the locomotions of swimming forward,turning and positioning were realized. | Hongkai Li Min Fan Yinghao Yue Guoliang Hu Qingsong He Min Yu | 2020 | Journal of Bionic Engineering2020，17，2： | 3 |
| 4 | Genetic architecture of maize yield traits dissected by QTL mapping and GWAS in maize显示文摘The study of yield traits can reveal the genetic architecture of grain yield for improving maize production.In this study, an association panel comprising 362 inbred lines and a recombinant inbred line population derived from X178 × 9782 were used to identify candidate genes for nine yield traits. High-priority overlap(HPO) genes, which are genes prioritized in a genome-wide association study(GWAS), were investigated using coexpression networks. The GWAS identified 51 environmentally stable SNPs in two environments and 36 pleiotropic SNPs, including three SNPs with both attributes. Seven hotspots containing 41 trait-associated SNPs were identified on six chromosomes by permutation. Pyramiding of superior alleles showed a highly positive effect on all traits, and the phenotypic values of ear diameter and ear weight consistently corresponded with the number of superior alleles in tropical and temperate germplasm. A total of 61 HPO genes were detected after trait-associated SNPs were combined with the coexpression networks. Linkage mapping identified 16 environmentally stable and 16 pleiotropic QTL.Seven SNPs that were located in QTL intervals were assigned as consensus SNPs for the yield traits.Among the candidate genes predicted by our study, some genes were confirmed to function in seed development. The gene Zm00001 d016656 encoding a serine/threonine protein kinase was associated with five different traits across multiple environments. Some genes were uniquely expressed in specific tissues and at certain stages of seed development. These findings will provide genetic information and resources for molecular breeding of maize grain yield. | Xiao Zhang Zhiyong Ren Bowen Luo Haixu Zhong Peng Ma Hongkai Zhang Hongmei Hu Yikai Wang Haiying Zhang Dan Liu Ling Wu Zhi Nie Yonghui Zhu Wenzhu He Suzhi Zhang Shunzong Su Yaou Shen Shibin Gao | 2022 | The Crop Journal2022，10，2： | 2 |
| 5 | A lightweight data-voting strategy for triple-modular redundant control computers显示文摘Triple-modular redundancy(TMR), a well-known methodology for improving the reliability of computer systems, has been used for onboard control computers in many safety-critical space applications. In this paper, a lightweight data-voting strategy for TMR control computer is proposed, in which an additional straightforward input voting stage is added, so that determination of the maximum admissible deviation for output matching, as required by traditional strategies, can be avoided. The lightweight strategy is a practical data-voting solution for the TMR control computer that exploits the characteristics of the data of the control computer. The addition of input voting, in both the value and time domains, can ensure that the outputs of non-faulty machines are exactly equal, and the bitwise output matching of the TMR control computer can be performed. The new data-voting strategy has been optimized according to the actual application conditions in spacecraft control systems, and has been adopted for the TMR control computer of the Chang’e-5 Return Spacecraft. The results of the ground experiments and successful on-orbit application have demonstrated the advantages of the new data-voting strategy for TMR control computer. | LIU Bo YANG MengFei WANG Yong YUAN Li LIU ChaoWei XU Jian YU Dan HU HongKai FENG Dan | 2022 | Science China(Technological Sciences)2022，65，2： | 0 |
| 6 | All-perfluoropolymer,nonlinear stability-assisted monolithic surface combines topology-specific superwettability with ultradurability显示文摘Developing versatile and robust surfaces that mimic the skins of living beings to regulate air/liquid/solid matter is critical for many bioinspired applications.Despite notable achievements,such as in the case of developing robust superhydrophobic surfaces,it remains elusive to realize simultaneously topology-specific superwettability and multipronged durability owing to their inherent tradeoff and the lack of a scalable fabrication method.Here,we present a largely unexplored strategy of preparing an all-perfluoropolymer(Teflon),nonlinear stability-assisted monolithic surface for efficient regulating matters. | Wanbo Li Chiu-wing Chan Zeyu Li Sin-Yung Siu Siyu Chen Han Sun Zeyu Liu Yisu Wang Chong Hu Nicola Maria Pugno Richard N.Zare Hongkai Wu Kangning Ren | 2023 | The Innovation2023，4，2： | 0 |
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