|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Genome analysis of Taraxacum kok-saghyz Rodin provides new insights into rubber biosynthesis显示文摘The Russian dandelion Taraxacum kok-saghyz Rodin(TKS), a member of the Composite family and a potential alternative source of natural rubber(NR) and inulin, is an ideal model system for studying rubber biosynthesis. Here we present the draft genome of TKS, the first assembled NR-producing weed plant. The draft TKS genome assembly has a length of 1.29 Gb, containing 46 731 predicted protein-coding genes and68.56% repeats, in which the LTR-RT elements predominantly contribute to the genome enlargement. We analyzed the heterozygous regions/genes, suggesting its possible involvement in inbreeding depression.Through comparative studies between rubber-producing and non-rubber-producing plants, we found that enzymes of the mevalonate(MVA) pathway and rubber elongation might be critical for rubber biosynthesis, and several key isoforms have been isolated and shown to be predominantly expressed in the latex, indicating their crucial functions in rubber biosynthesis. Moreover, for two important families in rubber elongation, the CPT/CPTL and REF/SRPP families, diverse evolutionary tracks have been revealed. These results provide valuable resources and new insights into the mechanism of NR biosynthesis,and facilitate the development of alternative NR-producing crops. | Tao Lin Xia Xu Jue Ruan Shizhong Liu Shigang Wu Xiujuan Shao Xiaobo Wang Lin Gan Bi Qin Yushuang Yang Zhukuan Cheng Suhua Yang Zhonghua Zhang Guosheng Xiong Sanwen Huang Hong Yu Jiayang Li | 2018 | National Science Review2018，5，1： | 22 |
| 2 | Stability Analysis of PLL Influenced by Control Loops in Grid-connected Converters Under Fault Disturbance显示文摘When the power grid suffers from grid faults that cause phase disturbances,the grid-connected converter becomes destabilized by the interaction between the phase-locked loop(PLL)and the control loop.In this paper,the stability of the PLL affected by the control loop under transient grid faults is studied.First,the equivalent model of the PLL under the influence of the control loop is established.Then,different response processes of PLLs under the ground fault with various control parameters are qualitatively analyzed.Furthermore,a small-signal model is proposed to assess the stability of the PLL under different control loop parameters.The system poles can be calculated to show the physical origin of the instability.Finally,simulations of a three-phase 21-level modular multilevel converter(MMC)built in PSCAD and a down-scale experiment is performed to verify the parameter influence of the control loop on the PLL. | Yushuang Liu Meng Huang Xiaoming Zha Herbert Ho-Ching Iu | 2020 | CSEE Journal of Power and Energy Systems2020，6，2： | 6 |
| 3 | Three New Stoneflies (Insecta:Plecoptera) from the Yixian Formation of Liaoning,China显示文摘摘要:三个新类和种类 Archaeoperla rarissimus 情报。et sp。nov。(Perlidae ) , Liaotaenionema tenuitibia 情报。et sp。nov。(Taeniopterygidae ) 并且 Parvinemoura parvus 情报。et sp。nov。(? Nemouridae ) 被描述并且说明。所有从西方的辽宁的 Yixian 形成他们被收集,中国。迄今,一。rarissimus 是拥有 Perlidae 的典型人物的最旧的种类;发现 L。tenuitibia 显示曾经在东北中国过在的 taeniopterygids 迟了的中生代,而是经常的暴烈的活动,气候变化,或另外的环境变化可能在中生代以后在北中国导致了 Taeniopterygidae 的消失。Nemouridae 的祖先的组从 P 的中间的侏罗记,和男生殖器是丰富的。parvus 情报。et sp。nov。被开发了并且类似于在迟了的中生代的现存 Nemouridae。stonefly,石块从 Yixian 发现形成不在家庭水平在种类水平,而是富人是若干个的。差异 stonefly 暗示不同小气候在那时间在东北中国存在。大旧湖的盆在西方的辽宁存在,在沼泽地和湖岸上由生活在水中或湿地的植物包围了,温暖、潮湿;附近的山腰上的高乔木和丛林,温和、干燥;在远处的山,小河在山之中跑,凉爽、湿。许多昆虫,比较喜欢凉爽的气候(例如 stonefly, raphidiopterans,等) ,与小河在山住在一起。 | LIU Yushuang REN Dong Nina D. SINITSHENKOVA SHIH Chungkun | 2008 | Acta Geologica Sinica(English Edition)2008，82，2： | 6 |
| 4 | MMC-MTDC Transmission System with Partially Hybrid Branches显示文摘This paper proposes a hybrid submodule modular multilevel converter(MMC)topology which is suitable for multi terminal direct current(MTDC)transmission systems.Each arm of the proposed MMC topology consists of a half-bridge submodule(HBSM)branch and two parallel full-bridge submodule(FBSM)branches.Comparing with the conventional MTDC transmission system,the proposed topology can selectively block the DC fault current and isolate the corresponding fault line without expensive DC circuit breakers(DCCBs).Thus,the influence range of the DC fault can be reduced and the reliability of the power supply can be improved as well.The corresponding modulation and voltage balancing strategies are developed for the proposed hybrid MMC topology.The feasibility of the proposed topology and control strategy is verified in the MATLAB/Simulink simulation. | Yongyang Chen Shangzhi Pan Meng Huang Zili Zhu Yushuang Liu Xiaoming Zha | 2021 | CES Transactions on Electrical Machines and Systems2021，5，2： | 4 |
| 5 | Two new Jurassic stoneflies (Insecta: Plecoptera) from Daohugou, Inner Mongolia, China显示文摘Two new genera and two new species of family Taeniopterygidae, Mengitaenioptera multiramis gen. et sp. nov. and Noviramonemoura trinervis gen. et sp. nov. are described. These fossils were collected from Daohugou Village (the Middle Jurassic), Inner Mongolia, China. Hitherto, these fossil species from Daohugou are the oldest taeniopterygids. Both simple and complex venations simultaneously occurred in this group, which reveals that the early diversification of taeniopterids was well underway by the Middle Jurassic. Therefore, we prefer to adopt the Comstock's opinion that the venation of taeniopterids was derived from the simple venation of the older group (such as Palaeonemouridae) at much ancient geological time ago. Some of the descendants carried this simple venation; others evolved into complex venation with many additional crossveins and branches. | Yushuang Liu Dong Ren | 2008 | Progress in Natural Science:Materials International2008，18，8： | 3 |
| 6 | Confining effect of oxide film on tin whisker growth显示文摘Spontaneous tin whisker growth has been mysterious and catastrophic for more than half century. The difficulty in the research on this topic consists of the randomness of the whisker growth, the slow growth rate and many other tricky factors. Herein, with Ti2SnC-Sn as a new platform, fast tin whisker growth is realized to facilitate the research. The whisker morphology is found to be modulated by oxide film. A striated whisker morphology forms as growing in air, whereas a faceted morphology forms in vacuum.Furthermore, the evolution to the faceted morphology is attributed to the reconstruction of the whisker surface driven by surface energy reduction. The findings might open a new avenue to uncover the myths of this long-standing issue, and thus develop a long-awaited lead-free tin whisker mitigation strategy. | Yushuang Liu Peigen Zhang Jin Yu Jian Chen Yamei Zhang Zhengming Sun | 2019 | Journal of Materials Science & Technology2019，35，8： | 2 |
| 7 | Negative Temperature Coefficient of Resistivity in Bulk Nanostructured Ag显示文摘The change of the temperature coefficient of resistivity (α) with the particle size, dp., and the grain size, dc, in the nanostructured Ag bulk samples was investigated. dp and d. were controlled by heating the nano-Ag powders over the temperature range from 393 to 453 K. The electrical resistance measurements of the nanostructured Ag bulk samples obtained by compacting the Ag powders after heat treatments showed a change in the sign of α with dp. and dc. When dp and dc are smaller or equal to 18 and 11 nm below room temperature or 20 and 12 nm above room temperature, respectively, the sign of the temperature coefficient of resistivity changes from positive to negative. The negative α arises mainly from the high resistivity induced by the particle interfaces with very lowly ordered or even disordered structure, a large volume fraction of interfaces and impurities existing in the interfaces, and the quantum size effect appearing in the nano-Ag grains. | Yushuang LIU, Chimei MO+ and Weili CAI (Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China) | 2000 | Journal of Materials Science & Technology2000，16，5： | 1 |
| 8 | Spontaneous Ga whisker formation on FeGa_3显示文摘FeGa_3 has attracted considerable attention as potential material for many fields, whereas the whiskering phenomenon may cast doubts on its applications. Spontaneous Ga whisker formation was observed on the ballmilled FeGa_3-Ga. The sample made from ball-milled FeGa_3 powders free of elemental Ga are immune to the Ga whisker formation, even if all the processing parameters were the same as the FeGa_3-Ga composite sample. In addition, several nano-sized Ga whiskers were found on the pressed FeGa_3-Ga composite without ball milling,and the as-synthesized FeGa_3-Ga grew only tiny Ga balls on the surface. These whiskering phenomena do not follow the traditional metal whisker formation mechanisms. A newly proposed catalysis-based mechanism, in which the cleavage planes of FeGa_3 grains act as heterogeneous nucleation sites and the elemental Ga provides Ga atoms for whisker formation, is employed to explain Ga whisker formation on FeGa_3. | Yushuang Liu Peigen Zhang Li Yang Wubian Tian Yamei Zhang Zhengming Sun | 2018 | Progress in Natural Science:Materials International2018，28，5： | 1 |
| 9 | Mechanism and mitigation of spontaneous Ga whisker growth on Cr2GaC显示文摘Spontaneous growth of A-element whiskers on Mn+1AXn(MAX for short) phase materials poses a barrier to their practical applications, since it casts doubts on their stability. In this study, Ga whisker growth on sintered Cr2GaC samples was investigated. The elemental source for spontaneous growth of Ga whiskers is identified as the free Ga contained in the Cr2GaC material, not the lattice atoms from Cr2GaC grains, which removes the doubts on the stability of Cr2GaC material. The growth behavior and morphologies of the Ga whiskers follow a new catalysis-based model, with cleavage planes of Cr2GaC grains involved as nucleation sites. This model explains and predicts well the growth behavior of the whiskers. The mitigation strategy based on this model is in principle simple: to prevent free Ga in Cr2GaC material or limit it to a certain level;to avoid cleavage plane of Cr2GaC grains;to achieve high density of the Cr2GaC material. | ZHANG PeiGen DING JianXiang LIU YuShuang YANG Li TIAN WuBian OUYANG Jian ZHANG YaMei SUN ZhengMing | 2020 | Science China(Technological Sciences)2020，63，3： | 1 |
| 10 | Free-standing hybrid films comprising of ultra-dispersed titania nanocrystals and hierarchical conductive network for excellent high rate performance of lithium storage显示文摘The construction of advanced electrode materials is key to the field of energy storage.Herein,a free-standing anatase titania(TiO_(2))nanocrystal/carbon nanotube(CNT)film is reported using a simple and scalable sol-gel method,followed by calcination.This unique free-standing film comprises ultra-small TiO_(2) nanocrystals(~5.9 nm)and super-aligned CNTs,with ultra-dispersed TiO_(2) nanocrystals on the surfaces of the CNTs.On the one hand,these TiO_(2) nanocrystals can significantly decrease the diffusion distance of the charges and on the other hand,the cross-linked CNTs can act as a three-dimensional(3D)conductive network,allowing the fast transport of electrons.In addition,the film is free-standing,without requiring electrode fabrication and additional conductive agents and binders.Owing to these above synergistic effects,the film is directly used as an anode in Li-ion batteries,and delivers a high discharge capacity of~105 mAh·g^(−1) at high rate of 60 C(1 C=170 mA·g^(−1))and excellent cycling performance over 2,500 cycles at 30 C.These results indicate that the free-standing anatase TiO_(2) nanocrystal/CNT film affords a superior performance among the various TiO_(2) materials and can be a promising anode material for fast-charging Li-ion batteries.Moreover,the TiO_(2)/CNT film exhibits an areal capacity of up to 2.4 mAh·cm^(−2),confirming the possibility of its practical use. | Kunlei Zhu Chenyu Li Yushuang Jiao Jiawen Zhu Hongtao Ren Yufeng Luo Shoushan Fan Kai Liu | 2021 | Nano Research2021，14，7： | 1 |
| 11 | Identification and characterization of miRNAome in tobacco ( Nicotiana tabacum ) by deep sequencing combined with microarray显示文摘 | Yushuang Guo Hanhua Liu Zhixiao Yang Jing Chen Yimin Sun Xueliang Ren | 2012 | Gene2012，，1： | 1 |
| 12 | Transient Current Estimation of MMC-HVDC Systems Under a Grid-converter Phase Difference显示文摘When a modular multilevel converter based high voltage direct current(MMC-HVDC)system operates under grid faults,there will be a phase difference between the grid voltage and the converter output.It can be caused by grid voltage phase shifting and the integration effect of the phase-locked loop(PLL)in the converter.The system may exhibit an undesirable transient process with expanded current which is harmful for the converter devices.In this paper,a transient current estimation method is proposed for the scenario of converter-grid phase difference caused by the frequency shifting of the grid side.A piecewise phase calculation model is established to determine the transient phase difference of the system.Then,according to the maximum phase difference calculated by the model,the system stability is assessed and the maximum value of system transient current can be estimated after comparing the maximum phase difference with the critical phase difference and π,Finally,the current estimation results are verified by detailed circuit simulations of a 21-level MMC-HVDC system built in PSCAD. | Yushuang Liu Meng Huang Xiaoming Zha Herbert Ho-Ching Iu | 2021 | CSEE Journal of Power and Energy Systems2021，7，4： | 1 |
| 13 | Tin whiskers prefer to grow from the [001] grains in a tin coating on aluminum substrate显示文摘This work aims at understanding the features of the Sn grains from which whiskers prefe rentially grow.The growth behavior of Sn whiskers on a 50 μm thick hypereutectic Sn-Al alloy coating was observed in situ by mapping the grain orientations before and after aging using the electron backscatter diffraction(EBSD) technique.Sn whiskers were found to grow preferentially from the(001) or near-(001) grains surrounded by the grains having perpendicular orientations,such as(100),(110) and(210).The compre s sive stress in the coating was heterogeneous,and the(001) grains exhibited the higher compressive stress close to the grain boundaries.The orientation relationship between α-Al phase and β-Sn phase was confirmed as(200)_(α-A)||(200)_(β-Sn,[011]_(α-A)||[001]_(β-Sn).The plane matching resulted in approximately0.7 % misfit strain in β-Sn,which had little impact on the growth of whiskers.Dislocations pile-ups were found in the(001) grains and repulsed by the Sn oxide layer,giving the probability of cracking the oxide.Grain boundaries were found between the whisker and underneath grain.The dominant diffusion mode for early whisker growth was grain boundary diffusion aided by pipe diffusion. | Shuang Tian Yushuang Liu Peigen Zhang Jian Zhou Feng Xue ZhengMing Sun | 2021 | Journal of Materials Science & Technology2021，，21： | 0 |
| 14 | Tin whisker growth from titanium-tin intermetallic and the mechanism显示文摘Spontaneous growth of metal whiskers, represented by tin whiskers, has haunted tin-based platings and solder joints for decades and caused huge losses to the electronics industry. Despite numerous efforts, the underlying growth mechanism has been resisting interpretation, and the whiskering phenomenon even continues to expand its territory. Here, we report the growth of tin whiskers from a Ti6Sn5intermetallic.These tin whiskers share similar characteristics with those found on the platings or solder joints, but grow more and faster, with finer diameters. After tin whisker growth, Ti6Sn5retains its crystal structure,implying a dealloying process. Combining experimental and first-principles calculation results, we analyzed the growth mechanism of tin whiskers in detail, and proposed a diffusion-based growth model.The strain energy stored in Ti6Sn5during deformation provides a driving force for whisker growth, and the short-circuit diffusion paths generated by such deformation accelerate whisker growth. These findings identify the critical role of intermetallic substrate in the whiskering phenomenon, shedding new light for comprehensively understanding the whisker growth mechanisms. Furthermore, the plenty and rapid growth of tin whiskers also means a new method for the preparation of one-dimensional metallic materials. | Zhihua Tian Peigen Zhang Yan Zhang Jingwen Tang Yushuang Liu Jian Liu ZhengMing Sun | 2022 | Journal of Materials Science & Technology2022，，34： | 0 |
| 15 | Selective growth of tin whiskers from its alloys on Ti_(2)SnC显示文摘The spontaneous growth of metal whiskers has been investigated for more than 70 years.However,there is still no agreement on its growth mechanism,and moreover,new characteristics of this whiskering phenomenon continue to emerge.In this study,Ti_(2)SnC is found to be capable of extracting Sn out of its alloys(Sn Bi,Sn Ag)by selectively growing Sn whiskers,and the Sn whiskers share the features of the traditional whiskers on platings and solders.Replacing the Ti_(2)SnC substrate with Ti C or Si C,under the same conditions,however,the selective growth of Sn whisker does not happen,which means Ti_(2)SnC plays a critical role in it.Based on the unique crystal structure of Ti_(2)SnC,active Sn atoms diffusing through the basal planes of Ti_(2)SnC is proposed to explain the selectivity.The driving force is suggested to be the high interfacial energy between Ti_(2)SnC and tin.This study is of importance to further understand the growth mechanism of metallic whiskers,and it may be also possible to be harnessed to develop paradigm-shifting technologies of metal purification and metallic whisker/nanowire preparation. | Jingwen Tang Peigen Zhang Yushuang Liu Chengjie Lu Yan Zhang Wei He Wubian Tian Wei Zhang Zhengming Sun | 2020 | Journal of Materials Science & Technology2020，54，19： | 0 |
| 16 | Turnip mosaic virus manipulates DRM2 expression to regulate host CHH and CHG methylation for robust infection显示文摘DNA methylation is an important epigenetic marker for the suppression of transposable elements(TEs)and the regu-lation of plant immunity.However,little is known how RNA viruses counter defense such antiviral machinery.In this study,the change of DNA methylation in turnip mosaic virus(TuMV)-infected cells was analyzed by whole genome bisulfite sequencing.Results showed that the total number of methylated sites of CHH and CHG increased in TuMV-infected cells,the majority of differentially methylated regions(DMRs)in the CHH and CHG contexts were associated with hypermethylation.Gene expression analysis showed that the expression of two methylases(DRM2 and CMT3)and three demethylases(ROS3,DML2,DML3)was significantly increased and decreased in TuMV-infected cells,respec-tively.Pathogenicity tests showed that the enhanced resistance to TuMV of the loss-of-function mutant of DRM2 is associated with unregulated expression of several defense-related genes.Finally,we found TuMV-encoded NIb,the viral RNA-dependent RNA polymerase,was able to induce the expression of DRM2.In conclusion,this study discov-ered that TuMV can modulate host DNA methylation by regulating the expression of DRM2 to promote virus infection. | Xiaoyun Wu Mengzhu Chai Jiahui Liu Xue Jiang Yingshuai Yang Yushuang Guo Yong Li Xiaofei Cheng | 2022 | Stress Biology2022，2，1： | 0 |
| 17 | Position coordinates-based iterative reconstruction for robotic CT显示文摘Purpose Robotic CTs can achieve customized trajectory scanning with x-ray tube and detector held by flexible robotic arms rather than fixed rails or gantry.However,the motion errors of the robotic arms cannot be neglected.Hence,the reconstruction method of Robotic CTs should be suitable for arbitrary trajectory and should take motion errors into full consideration.Method In this paper,we present an iterative reconstruction method for robotic CT systems.Unlike the analytical algorithms,such as FDK,this method makes no assumption about the scan trajectory.The projection and backprojection operations are modeled by 3D distance-driven algorithm using the coordinates of x-ray source and detector center fed back from the robotic arm’s positioning system directly.Both numerical simulations and practical experiments are conducted to verify the effectiveness of this method in arbitrary trajectory reconstruction and motion errors correction for robotic CT systems.Results For our non-circular and non-planar trajectory scan,this proposed method could easily handle the reconstruction and obtain a result comparable to reference.In addition,for 0.1%motion errors,using the proposed method could improve the reconstruction quality,and the RMSE could be reduced by 30%.Conclusions This iterative reconstruction method is suitable for arbitrary trajectory scans and can decrease the degradation of image quality caused by motion errors of robotic arm. | Yushuang Zheng Qiong Xu Yi Zou Yan Li Shuangquan Liu Cunfeng Wei Long Wei | 2021 | Radiation Detection Technology and Methods2021，5，1： | 0 |
| 18 | Resistance identification of bivalent fungi-resistant genes transformed soybean to Phytophthora sojae显示文摘Soybean is one of the most important sources of edible oil and proteins in the world.However,it suffers from many kinds of fungal diseases which is a major limiting factor in soybean production.The fungal disease can be effectively controlled by breeding plant cultivars with genetic transformation.In this study,the resistance to Phytophthora sojae of five bivalent transgenic soybean lines was identified using the hypocotyls inoculation technique.The lines were the T,of the transgenic soybean which were transformed with kidney bean chitinase gene and barley ribosome inactivating protein gene,and were positive by Southern Blot analysis.The resistance difference was studied through comparing the death percentage of transgenic soybean with the control.The results showed that four lines were more resistant to P.sojae,whereas other one had no significant difference in comparison with the control.These transgenic soybean lines with enhanced resistance to P.sojae will be useful in soybean resistance breeding. | GUO Yushuang ZHANG Yanju ZHU Yanming LIU Jia LI Jie BAI Xi | 2007 | Journal of Northeast Agricultural University(English Edition)2007，14，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员