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| 1 | A Numerical Convex Lens for the State-Discretized Modeling and Simulation of Megawatt Power Electronics Systems as Generalized Hybrid Systems显示文摘Modeling and simulation have emerged as an indispensable approach to create numerical experiment platforms and study engineering systems.However,the increasingly complicated systems that engineers face today dramatically challenge state-of-the-art modeling and simulation approaches.Such complicated systems,which are composed of not only continuous states but also discrete events,and which contain complex dynamics across multiple timescales,are defined as generalized hybrid systems(GHSs)in this paper.As a representative GHS,megawatt power electronics(MPE)systems have been largely integrated into the modern power grid,but MPE simulation remains a bottleneck due to its unacceptable time cost and poor convergence.To address this challenge,this paper proposes the numerical convex lens approach to achieve state-discretized modeling and simulation of GHSs.This approach transforms conventional time-discretized passive simulations designed for pure-continuous systems into state-discretized selective simulations designed for GHSs.When this approach was applied to a largescale MPE-based renewable energy system,a 1000-fold increase in simulation speed was achieved,in comparison with existing software.Furthermore,the proposed approach uniquely enables the switching transient simulation of a largescale megawatt system with high accuracy,compared with experimental results,and with no convergence concerns.The numerical convex lens approach leads to the highly efficient simulation of intricate GHSs across multiple timescales,and thus significantly extends engineers’capability to study systems with numerical experiments. | Bochen Shi Zhengming Zhao Yicheng Zhu Zhujun Yu Jiahe Ju | 2021 | Engineering2021，7，12： | 3 |
| 2 | Recent Developments in Functional Crystals in China显示文摘Functional crystals are the basic materials for the development of modern science and technology and are playing key roles in the modern information era. In this paper, we review functional crystals in China, including research history, significant achievements, and important applications by highlighting the most recent progress in research. Challenges for the development of functional materials are discussed and possible directions for development are proposed by focusing on potential strengths of these materials. | Jiyang Wang Haohai Yu Yicheng Wu Robert Boughton | 2015 | Engineering2015，1，2： | 2 |
| 3 | Genome-wide analysis of expression quantitative trait loci(eQTLs)reveals the regulatory architecture of gene expression variation in the storage roots of sweet potato显示文摘Dissecting the genetic regulation of gene expression is critical for understanding phenotypic variation and species evolution.However,our understanding of the transcriptional variability in sweet potato remains limited.Here,we analyzed two publicly available datasets to explore the landscape of transcriptomic variations and its genetic basis in the storage roots of sweet potato.The comprehensive analysis identified a total of 724,438 high-confidence single nucleotide polymorphisms(SNPs)and 26,026 expressed genes.Expression quantitative trait locus(eQTL)analysis revealed 4408 eQTLs regulating the expression of 3646 genes,including 2261 local eQTLs and 2147 distant eQTLs.Two distant eQTL hotspots were found with target genes significantly enriched in specific functional classifications.By combining the information from regulatory network analyses,eQTLs and association mapping,we found that IbMYB1-2 acts as a master regulator and is the major gene responsible for the activation of anthocyanin biosynthesis in the storage roots of sweet potato.Our study provides the first insight into the genetic architecture of genome-wide expression variation in sweet potato and can be used to investigate the potential effects of genetic variants on key agronomic traits in sweet potato. | Lei Zhang Yicheng Yu Tianye Shi Meng Kou Jian Sun Tao Xu Qiang Li Shaoyuan Wu Qinghe Cao Wenqian Hou Zongyun Li | 2020 | Horticulture Research2020，7，1： | 2 |
| 4 | Energy-efficient and security-optimized AES hardware design for ubiquitous computing显示文摘Ubiquitous computing must incorporate a certain level of security.For the severely resource con-strained applications,the energy-efficient and small size cryptography algorithm implementation is a critical prob-lem.Hardware implementations of the advanced encryption standard (AES) for authentication and encryption are presented.An energy consumption variable is derived to evaluate low-power design strategies for battery-powered devices.It proves that compact AES architectures fail to optimize the AES hardware energy,whereas reducing invalid switching activities and implementing power-optimized sub-modules are the reasonable methods.Implemen-tations of different substitution box (S-Boxes) structures are presented with 0.25 μm 1.8 V CMOS (complementary metal oxide semiconductor) standard cell library.The comparisons and trade-offs among area,security,and power are explored.The experimental results show that Galois field composite S-Boxes have smaller size and highest security but consume considerably more power,whereas decoder-switch-encoder S-Boxes have the best power char-acteristics with disadvantages in terms of size and security.The combination of these two type S-Boxes instead of homogeneous S-Boxes in AES circuit will lead to optimal schemes.The technique of latch-dividing data path is analyzed,and the quantitative simulation results demonstrate that this approach diminishes the glitches effectively at a very low hardware cost. | Chen Yicheng Zou Xuecheng Liu Zhenglin Han Yu Zheng Zhaoxia | 2008 | Journal of Systems Engineering and Electronics2008，19，4： | 2 |
| 5 | Overexpression of phosphatidylserine synthase IbPSS1 affords cellular Na+homeostasis and salt tolerance by activating plasma membrane Na^(+)/H^(+)antiport activity in sweet potato roots显示文摘Phosphatidylserine synthase(PSS)-mediated phosphatidylserine(PS)synthesis is crucial for plant development.However,little is known about the contribution of PSS to Na^(+)homeostasis regulation and salt tolerance in plants.Here,we cloned the IbPSS1 gene,which encodes an ortholog of Arabidopsis AtPSS1,from sweet potato(Ipomoea batatas(L.)Lam.).The transient expression of IbPSS1 in Nicotiana benthamiana leaves increased PS abundance.We then established an efficient Agrobacterium rhizogenes-mediated in vivo root transgenic system for sweet potato.Overexpression of IbPSS1 through this system markedly decreased cellular Na^(+)accumulation in salinized transgenic roots(TRs)compared with adventitious roots.The overexpression of IbPSS1 enhanced salt-induced Na^(+)/H^(+)antiport activity and increased plasma membrane(PM)Ca^(2+)-permeable channel sensitivity to NaCl and H2O2 in the TRs.We confirmed the important role of IbPSS1 in improving salt tolerance in transgenic sweet potato lines obtained from an Agrobacterium tumefaciens-mediated transformation system.Similarly,compared with the wild-type(WT)plants,the transgenic lines presented decreased Na^(+)accumulation,enhanced Na^(+)exclusion,and increased PM Ca^(2+)-permeable channel sensitivity to NaCl and H2O2 in the roots.Exogenous application of lysophosphatidylserine triggered similar shifts in Na^(+)accumulation and Na^(+)and Ca^(2+)fluxes in the salinized roots of WT.Overall,this study provides an efficient and reliable transgenic method for functional genomic studies of sweet potato.Our results revealed that IbPSS1 contributes to the salt tolerance of sweet potato by enabling Na^(+)homeostasis and Na^(+)exclusion in the roots,and the latter process is possibly controlled by PS reinforcing Ca^(2+)signaling in the roots. | Yicheng Yu Ying Xuan Xiaofeng Bian Lei Zhang Zhiyuan Pan Meng Kou Qinghe Cao Zhonghou Tang Qiang Li Daifu Ma Zongyun Li Jian Sun | 2020 | Horticulture Research2020，7，1： | 2 |
| 6 | Distributed Consensus for Blockchains in Internet-of-Things Networks显示文摘In recent years,due to the wide implementation of mobile agents,the Internet-of-Things(IoT) networks have been applied in several real-life scenarios,servicing applications in the areas of public safety,proximity-based services,and fog computing.Meanwhile,when more complex tasks are processed in IoT networks,demands on identity authentication,certifiable traceability,and privacy protection for services in IoT networks increase.Building a blockchain system in IoT networks can greatly satisfy such demands.However,the blockchain building in IoT brings about new challenges compared with that in the traditional full-blown Internet with reliable transmissions,especially in terms of achieving consensus on each block in complex wireless environments,which directly motivates our work.In this study,we fully considered the challenges of achieving a consensus in a blockchain system in IoT networks,including the negative impacts caused by contention and interference in wireless channel,and the lack of reliable transmissions and prior network organizations.By proposing a distributed consensus algorithm for blockchains on multi-hop IoT networks,we showed that it is possible to directly reach a consensus for blockchains in IoT networks,without relying on any additional network layers or protocols to provide reliable and ordered communications.In our theoretical analysis,we showed that our consensus algorithm is asymptotically optimal on time complexity and is energy saving.The extensive simulation results also validate our conclusions in the theoretical analysis. | Li Yang Yifei Zou Minghui Xu Yicheng Xu Dongxiao Yu Xiuzhen Cheng | 2022 | Tsinghua Science and Technology2022，27，5： | 2 |
| 7 | The first discovery of eclogite and Palaeoproterozoic granitoids in the Beishan area,northwestern Gansu Province,China显示文摘The eclogite, discovered in Liuyuan, occurs as lenticular enclave within granitic gneiss. It has typical features of eclogite in petrology and mineralogy. The eclogite provides an important wirdow to reconstruct the tectonic border of the Tarim block. The granitoids, located in Baihu area, yield U-Pb zircon ages of 1 660—2 000 Ma (Palaeoproterozoic), which irrplies an early Precambrian basement in the area. | Hualin Mei Haifeng Yu Quan Li Songnian Lu Huimin Li Yicheng Zuo Guochao Zuo Dejin Ye Jincheng Liu | 1999 | Chinese Science Bulletin1999，44，4： | 1 |
| 8 | Heat conduction process on community networks as a recommendation model 显示文摘 | Zhang Yicheng Blattner M Yu Yikuo | 2007 | Physical Review Letters2007，99，15： | 1 |
| 9 | BaYOBO_(3):A deep-ultraviolet rare-earth oxy-borate with a large second harmonic generation response显示文摘Deep-ultraviolet(UV)nonlinear optical(NLO)crystals with excellent performances are of great importance in laser science and technology.However,to design and synthesize an ideal deep-UV NLO material with a balance between second harmonic generation(SHG)response and UV cut-off edge is still a huge challenge.Herein,a new oxy-borate BaYOBO_(3)(BaYBO)was designed and synthesized by substituting Be^(2+)with Y^(3+)from Sr_(2)Be_(2)B_(2(O_(7).The BaYBO features a stable three-dimensional framework and satisfies the property balance between a large SHG response(~2.6×KH_(2)PO_(4)KDP))and a short UV cut-off edge(<190 nm)as a promising deep-UV NLO candidate.The study of structure-property relationship indicates that the large SHG response of BaYBO is mainly attributed to the coplanar arrangement and large number density of BO_(3 )triangles.These results demonstrate that substituting Be^(2+)with Y^(3+)cations is also a feasible strategy for developing new deep-UV NLO crystals. | Mengen Gao Hongping Wu Hongwei Yu Zhanggui Hu Jiyang Wang Yicheng Wu | 2021 | Science China Chemistry2021，64，7： | 1 |
| 10 | Hyperspectral image unmixing algorithm based on endmember-constrained nonnegative matrix factorization显示文摘 | Yan ZHAO Zhen ZHOU Donghui WANG Yicheng HUANG Minghua YU | 2016 | Frontiers of Optoelectronics2016，9，4： | 1 |
| 11 | A novel fast disintegrating tablet fabricated by three- dimensional printing 显示文摘 | YU Dengguang WHITE C B YANG Yicheng | 2009 | Drug Dev Ind Pharm2009，35，12： | 1 |
| 12 | Thermal conductive behavior of zirconium boride coated by nanoalumina with different mass proportions in epoxy composites显示文摘The thermal conductive behavior of Zirconium diboride(Zr B_2)coated with different proportions nanoalumina(Al_2O_3)in epoxy composites was investigated by the laser flash experimental and finite element analysis(FEA)methods.The coated Zr B_2composite particles were categorized into the 3-1,3-2,3-3 and 3-4 systems,which corresponded to four different mass ratios of Zr B_2particles to Al_2O_3particles,respectively.It could be found that the coated Zr B_2composite particles were effective for increasing the thermal conductivity of the filled epoxy composites due to more effective formation of the conductive chain structure in the composites compared to the single-phase particles.In comparison,the system of 3-3 showed the most positive effect on improving the thermal conductive performance of epoxy composites.For composites with a 7 vol%of Zr B_2/Al_2O_3composite particles of 3-3 system,its thermal conductivity was 0.65 W m^(-1)K^(-1),increased by 20%and 79%relative to single-filled composites of Zr B_2and Al_2O_3with same filled content,respectively.The predicted thermal conductive results of Al_2O_3coated Zr B_2particles in epoxy matrix obtained by finite element analysis were in reasonable agreement with the experimental results. | Yicheng Wu Yannan He Zhiqiang Yu Xiaoyan Liu | 2018 | Progress in Natural Science:Materials International2018，28，3： | 1 |
| 13 | Phonon engineering in Yb:La_(2)CaB_(10)O_(19)crystal for extended lasing beyond the fluorescence spectrum显示文摘Since the first invention of the laser in 1960,direct lasing outside the fluorescence spectrum is deemed impossible owing to the“zero-gain”cross-section.However,when electron-phonon coupling meets laser oscillation,an energy modulation by the quantized phonon can tailor the electronic transitions,thus directly creating some unprecedented lasers with extended wavelengths by phonon engineering.Here,we demonstrate a broadband lasing(1000-1280 nm)in a Yb-doped La_(2)CaB_(10)O_(19)(Yb:LCB)crystal,far beyond its spontaneous fluorescence spectrum.Numerical calculations and in situ Raman verify that such a substantial laser emission is devoted to the multiphonon coupling to lattice vibrations of a dangling“quasi-free-oxygen”site,with the increasing phonon numbers step-by-step(n=1–6).This new structural motif provides more alternative candidates with strong-coupling laser materials.Moreover,the quantitative relations between phonon density distribution and laser wavelength extension are discussed.These results give rise to the search for on-demand lasers in the darkness and pave a reliable guideline to study those intriguing electron-phonon-photon coupled systems for integrated photonic applications. | Yanling Cheng Fei Liang Dazhi Lu Jingcheng Feng Guochun Zhang Haohai Yu Huaijin Zhang Yicheng Wu | 2023 | Light(Science & Applications)2023，12，9： | 1 |
| 14 | Heat conduction process on community networks as a recommendation model 显示文摘 | Zhang Yicheng Blattner M Yu Yikuo | 2008 | Physical Re- view Letters2008，99，12： | 1 |
| 15 | MicroRNA-21 targets LRRFIP1 and contributes to VM-26 resistance in glioblastoma multiforme显示文摘 | Yiming Li Weiqing Li Yongji Yang Yicheng Lu Cheng He Guohan Hu Huimin Liu Juxiang Chen Jin He Hongyu Yu | 2009 | Brain Research2009，，： | 1 |
| 16 | Morphological, functional and metabolic imaging biomarkers: assessment of vascular-disrupting effect on rodent liver tumours显示文摘 | Huaijun Wang Junjie Li Feng Chen Frederik Keyzer Jie Yu Yuanbo Feng Johan Nuyts Guy Marchal Yicheng Ni | 2010 | European Radiology2010，，8： | 1 |
| 17 | Murine liver implantation of radiation-induced fibrosarcoma: characterization with MR imaging, microangiography and histopathology显示文摘 | Huaijun Wang Marie Putte Feng Chen Frederik Keyzer Lixin Jin Jie Yu Guy Marchal Peter Witte Yicheng Ni | 2008 | European Radiology2008，，7： | 1 |
| 18 | Magnetic Resonance Imaging of Acute Reperfused Myocardial Infarction: Intraindividual Comparison of ECIII-60 and Gd-DTPA in a Swine Model显示文摘 | Jiyang Jin Gaojun Teng Yi Feng Yanping Wu Qindi Jin Yu Wang Zhen Wang Qin Lu Yibo Jiang Shengqi Wang Feng Chen Guy Marchal Yicheng Ni | 2007 | CardioVascular and Interventional Radiology2007，，2： | 1 |
| 19 | Morphological, functional and metabolic imaging biomarkers: assessment of vascular-disrupting effect on rodent liver tumours显示文摘 | Huaijun Wang Junjie Li Feng Chen Frederik Keyzer Jie Yu Yuanbo Feng Johan Nuyts Guy Marchal Yicheng Ni | 2010 | European Radiology2010，，8： | 1 |
| 20 | Magnetic resonance imaging after radiofrequency ablation in a rodent model of liver tumor: tissue characterization using a novel necrosis-avid contrast agent显示文摘 | Yicheng Ni Feng Chen Stefaan Mulier Xihe Sun Jie Yu Willy Landuyt Guy Marchal Alfons Verbruggen | 2006 | European Radiology2006，，5： | 1 |
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