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| 1 | The impacts of conservation agriculture on crop yield in China depend on specific practices, crops and cropping regions显示文摘For smooth and wide application of conservation agriculture(CA), remaining uncertainties about its impacts on crop yield need to be reduced. Based on previous field experiments in China, a meta-analysis was performed to quantify the actual impacts of CA practices(NT: no/reduced-tillage only, CTSR: conventional tillage with straw retention, NTSR: NT with straw retention) on crop yields as compared to conventional tillage without straw retention(CT).Although CA practices increased crop yield by 4.6% on average, there were large variations in their impacts. For each CA practice, CTSR and NTSR significantly increased crop yield by 4.9%and 6.3%, respectively, compared to CT. However, no significant effect was found for NT. Among ecological areas, significant positive effects of CA practices were found in areas with an annual precipitation below 600 mm. Similar effects were found in areas with annual mean air temperature above 5 °C. For cropping regions, CA increased crop yield by 6.4% and 5.5%compared to CT in Northwest and South China, respectively, whereas no significant effects were found in the North China and Northeast China regions. Among crops, the positive effects of CA practices were significantly higher in maize(7.5%) and rice(4.1%) than in wheat(2.9%). NT likely decreased wheat yield. Our results indicate that there are great differences in the impacts of CA practices on crop yield, owing to regional variation in climate and crop types. CA will most likely increase maize yield but reduce wheat yield. It is strongly recommended to apply CA with crop straw retention in maize cropping areas and seasons with a warm and dry climate pattern. | Chengyan Zheng Yu Jiang Changqing Chen Yanni Sun Jinfei Feng Aixing Deng Zhenwei Song Weijian Zhang | 2014 | The Crop Journal2014，2，5： | 15 |
| 2 | Gold immunochromatographic sensor for the rapid detection of twenty-six sulfonamides in foods显示文摘一个金 immunochromatographic 传感器(GICS ) 在蜂蜜样品为 26 硫安类药剂的快速的察觉被开发。传感器基于能认出所有 26 硫安类药剂的组特定的 monoclonal 抗体(mAb ) 。三 haptens (1 与 thiazole 包围的 hapten, 2 与苯包围的 hapten,和 3 与直碳锁住的 hapten ) 被用于抗原准备。与 hybridoma 技术,组特定的 mAb 与 50% 最大的禁止的集中被屏蔽(对 sulfathizole (STZ ) 和从 0.08 ~ 90.18 ng/mL 的另外的 25 类似物的 IC 50) 。单音分散金 nanoparticles 与 mAb 被结合开发侧面的 immunochromatographic 长带。0.1 g/mL 的标记的抗体集中和在测试线的 0.2 g/mL 的涂层抗原集中为长带准备被选择。在优化条件,为 STZ 的集中的察觉( vLOD )的视觉限制, sulfamethoxazole , sulfamethizole ,磺胺嘧啶, sulfamerazine , sulfadimethoxine , sulfamonomethoxine , sulfameter , sulfamethoxypyridazine ,和 sulfachloropyridazine 下面是 5 , 0.25 , 0.25 , 10 , 5 , 10 , 25 , 2.5 , 5 , 0.25 ,和 10 g/kg 分别地。在蜂蜜样品的扫描仪分析为 26 硫安类药剂的察觉揭示了好性能。商业蜂蜜样品与传感器被测试,积极结果与高效的液体层析被证实。建议脱衣传感器在爱人样品为硫安类药剂污染物质的快速、可靠的决心提供一个方便方法。 | Yanni Chen Liqiang Liu Liguang Xu Shanshan Song Hua Kuang Gang Cui Chuanlai Xu | 2017 | Nano Research2017，10，8： | 11 |
| 3 | LAMOST Experiment for Galactic Understanding and Exploration (LEGUE)——The survey's science plan显示文摘We describe the current plans for a spectroscopic survey of millions of stars in the Milky Way galaxy using the Guo Shou Jing Telescope (GSJT, formerly called the Large sky Area Multi-Object fiber Spectroscopic Telescope - LAMOST). The survey will obtain spectra for 2.5 million stars brighter than r < 19 during dark/grey time, and 5 million stars brighter than r < 17 or J < 16 on nights that are moonlit or have low transparency. The survey will begin in the fall of 2012, and will run for at least four years. The telescope's design constrains the optimal declination range for observations to 10 < δ < 50 , and site conditions lead to an emphasis on stars in the direction of the Galactic anticenter. The survey is divided into three parts with different target selection strategies: disk, anticenter, and spheroid. The resulting dataset will be used to study the merger history of the Milky Way, the substructure and evolution of the disks, the nature of the first generation of stars through identification of the lowest metallicity stars, and star formation through study of open clusters and OB associations. Detailed design of the LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) survey will be completed in summer 2012, after a review of the results of the pilot survey. | Li-Cai Deng Heidi Jo Newberg Chao Liu Jeffrey L. Carlin Timothy C. Beers Li Chen Hsu-Tai Lee Carl J. Grillmair Puragra Guhathakurta] Zhan-Wen Han Jin-Liang Hou Sebastien Lepine Jing Li Xiao-Wei Liu Kai-Ke Pan J. A. Sellwood Bo Wang Hong-Chi Wang Fan Yang Brian Yanny Hao-Tong Zhang Yue-Yang Zhang Zheng Zheng Zi Zhu | 2012 | Research in Astronomy and Astrophysics2012，12，7： | 10 |
| 4 | VNF-FG design and VNF placement for 5G mobile networks显示文摘Network function virtualization(NFV) is envisioned as one of the critical technologies in 5thGeneration(5G) mobile networks. This paper investigates the virtual network function forwarding graph(VNFFG) design and virtual network function(VNF) placement for 5G mobile networks. We first propose a two-step method composed of flow designing and flow combining for generating VNF-FGs according to network service requests. For mapping VNFs in the generated VNF-FG to physical resources, we then modify the hybrid NFV environment with introducing more types of physical nodes and mapping modes for the sake of completeness and practicality, and formulate the VNF placement optimization problem for achieving lower bandwidth consumption and lower maximum link utilization simultaneously. To resolve this problem, four genetic algorithms are proposed on the basis of the frameworks of two existing algorithms(multiple objective genetic algorithm and improved non-dominated sorting genetic algorithm). Simulation results show that Greedy-NSGA-II achieves the best performance among our four algorithms. Compared with three non-genetic algorithms(random, backtracking mapping and service chains deployment with affiliation-aware), Greedy-NSGA-II reduces 97.04%, 87.76% and88.42% of the average total bandwidth consumption, respectively, and achieves only 13.81%, 25.04% and 25.41%of the average maximum link utilization, respectively. Moreover, using our VNF-FG design method and GreedyNSGA-II together can also reduce the total bandwidth consumption remarkably. | Jiuyue CAO Yan ZHANG Wei AN Xin CHEN Jiyan SUN Yanni HAN | 2017 | Science China(Information Sciences)2017，60，4： | 8 |
| 5 | Toward emerging gallium oxide semiconductors:A roadmap显示文摘Owing to the advantages of ultra-wide bandgap and rich material systems,gallium oxide(Ga_(2)O_(3))has emerged as a highly viable semiconductor material for new researches.This article mainly focuses on the growth processes,material characteristics,and applications of Ga_(2)O_(3).Compared with single crystals and the epitaxial growth of other wide-bandgap semiconductors,large-size and high-quality��-Ga_(2)O_(3) single crystals can be efficiently grown with a low cost,making them highly competitive.Thanks to the availability of high-quality single crystals,epi-taxial films,and rich material systems,high-performance semiconductor devices based on Ga_(2)O_(3) go through a booming development in recent years.The defects and interfaces of Ga_(2)O_(3) are comprehensively analyzed owing to their significant influence on practical applications.In this study,the two most common applications of Ga_(2)O_(3) materials are introduced.The high breakdown electric field,high working temperature,and excellent Baliga’s figure-of-merit of Ga_(2)O_(3) represent an inspiring prospect for power electronic devices.In addition,the excellent absorption in deep-ultraviolet band provides new ideas for optoelectronic detectors and ensures the dramatic progress.Finally,the summary,challenges,and prospects of the Ga_(2)O_(3) materials and devices are presented and discussed. | Yuan Yuan Weibing Hao Wenxiang Mu Zhengpeng Wang Xuanhu Chen Qi Liu Guangwei Xu Chenlu Wang Hong Zhou Yanni Zou Xiaolong Zhao Zhitai Jia Jiandong Ye Jincheng Zhang Shibing Long Xutang Tao Rong Zhang Yue Hao | 2021 | Fundamental Research2021，1，6： | 5 |
| 6 | PERMANENCE AND PERIODIC SOLUTION IN AN INTEGRODIFFERENTIAL SYSTEM WITH DISCRETE DIFFUSION显示文摘Dynamical characteristics of an integrodifferential modelling competitive sys-tem with diffusion are investigated.In particular,we derive sufficient conditions for the permanence of species,existence of an attracting periodic solution to the periodic system.The results of Wang Ke in 1994 and 1998 are improved and extended. | XIAO Yanni CHEN Lansun TANG Sanyi (Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China) | 2003 | Journal of Systems Science & Complexity2003，16，1： | 5 |
| 7 | Analysis of a SIS epidemic model with stage structure and a delay显示文摘A disease transmission model of SIS type with Stage structure and a delay corresponding to the infectious period is formulated. By constructing the difference operator and using global convergence theorem, we show that the disease-free equilibrium is globally asymp- totically stable. The Stability of an endemic equilibrium are investigated for the differential- difference equations. | Yanni XIAO and Lansun CHEN (Academy of Mathematics & System Sciences, Academic Sinica, Beijing 100080, China | 2001 | Communications in Nonlinear Science and Numerical Simulation2001，6，1： | 5 |
| 8 | Powertrain parameter matching and optimal design of dual-motor driven electric tractor显示文摘The rationality of powertrain parameter design has a significant influence on the traction performance and economic performance of electric tractor.At present,researches on powertrain parameter design mainly focus on electric vehicles,and electric agricultural machinery draw much less attention.Therefore,a method of powertrain parameter matching and optimization design for electric tractor was proposed in this paper,which was based on dual-motor coupling drive mode.The particle swarm optimization(PSO)algorithm based on mixed penalty function was used for parameter optimization.Parameter optimization design was programmed using MATLAB.A simulation dynamic model with optimization design variables of electric tractor powertrain was established based on MATLAB/Simulink.Compared with the simulation results before optimization,the objective functions were optimized and the traction performance of electric tractor was improved,which indicated the effectiveness of the proposed method. | Yanni Chen Bin Xie Yuefeng Du Enrong Mao | 2019 | International Journal of Agricultural and Biological Engineering2019，12，1： | 4 |
| 9 | Study on Extraction Technology of Theabrownine from Liubao Tea and Its Antioxidant Activity显示文摘[Objective]This study aimed to provide theoretical reference for the extraction of theabrownine from Liubao tea,determination of the biological activity,and development and utilization of theabrownine. [Method]Orthogonal experimental design was adopted to investigate the effects of solid-liquid ratio,extraction temperature,extraction duration,and extraction frequency on the yield of theabrownine extracted from Liubao tea. The extraction technology was optimized,and the antioxidant activity of theabrownine was analyzed. [Result] The results showed that extraction frequency and extraction temperature had significant effects on the yield of theabrownine extracted from Liubao tea,while solid-liquid ratio and extraction duration had no significant effect. The optimal conditions for extracting theabrownine from Liubao tea were determined as follows: solid-liquid ratio was 1∶30,extraction temperature was 100 ℃,extraction duration was 80 min,and extraction frequency was 4 times. Under these conditions,the yield of theabrownine reached 22.92%. Results of antioxidant activity determination showed that hydroxyl radical-scavenging activity of theabrownine was as high as 74%,and the scavenging effects was significantly higher than that of Vitamin C under low concentrations; nitroso-scavenging activity of theabrownine reached 73%,with no significant difference from that of Vitamin C; superoxide anion free radical-scavenging activity of theabrownine could be above 60%,which was lower than that of Vitamin C. [Conclusion]Liubao tea contains abundant theabrownine that has relatively high antioxidant activity with good prospects in antioxidant application,which lays solid foundation for in-depth development of Liubao tea. | Yingzi HE Zhaoqi LU Yanfang CHEN Yanni LIU Xiaoyan HUANG Weizhi ZHENG | 2013 | Agricultural Biotechnology2013，2，4： | 4 |
| 10 | Progress in modeling of fluid flows in crystal growth processes显示文摘在水晶生长过程液体流动当模特儿在理论、适用的力学成为了一个重要研究区域。大多数水晶生长过程包含液体流动,例如在 melt,答案或蒸汽的流动。理论建模在开发使用为电子的高效和 optoelectronic 设备种半导体晶体的技术起了一个重要作用。设备的应用程序与结晶的完美,低缺点密度和一致掺杂物分发的高度要求大直径晶体。在这篇文章,流动模型在象 Czochralski, ammonothermal 和物理蒸汽那样的水晶生长过程当模特儿发展了运输方法被考察。在当模特儿的 Czochralski 生长,流动当模特儿因为 thermocapillary 流动,狂暴的流动和 MHD 流动被开发了。在当模特儿的 ammonothermal 生长,快活和多孔的媒介流动模型被开发了基于一单个域并且为合成的液体多孔的层系统的连续统途径。在当模特儿的物理蒸汽运输生长, Stefan 流动模型为蒸汽生长基于流动动力学理论被建议了。另外,为水晶生长建模上的未来研究的观点被建议。 | Qisheng Chen Yanni Jiang Junyi Yan Ming Qin | 2008 | Progress in Natural Science:Materials International2008，18，12： | 2 |
| 11 | Modeling and analysis of a predator–prey model with disease in the prey显示文摘 | Yanni Xiao Lansun Chen | 2001 | Mathematical Biosciences2001，，： | 2 |
| 12 | Analysis of a three Species Eco-epidemiological model显示文摘 | Lansun Chen | 2001 | J Math Appl2001，258，2： | 1 |
| 13 | A ratio-dependent predator-prey model with disease in the prey显示文摘 | Xiao Yanni Chen Lansun | 2002 | Applied Mathematics and Computa- tion2002，131，： | 1 |
| 14 | Modeling and analysis of a predator-prey model with disease in the prey显示文摘 | Xiao Yanni Chen Lansun | 2001 | Mathematical Biosciences2001，171，： | 1 |
| 15 | Analysis of a three species eco-epidemiological model显示文摘 | Yanni Xiao Lansun Chen | 2001 | J Math Anal Appl2001，258，2： | 1 |
| 16 | A ratio-dependent predator-prey model with disease in the prey 显示文摘 | Xiao Yanni Chen Lansun | 2002 | Appl Math Comput2002，131，： | 1 |
| 17 | A Ratio-Dependent Predator-Prey Model with Disease in the Prey显示文摘 | Chen Lansun | 2002 | Applied Mathematics and Computation2002，131，： | 1 |
| 18 | Analysis of a three species eco-epidemibiologieal model显示文摘 | Yanni Xiao Lansun Chen | 2001 | J Math Appl2001，258，2： | 1 |
| 19 | Modelling and analysis of a predator-prey model with disease in the prey显示文摘 | Xiao Yanni Chen Lansun | 2001 | Mathematical Biological2001，171，1： | 1 |
| 20 | Integrated pest management models and their dynamical behaviour显示文摘 | Sanyi Tang Yanni Xiao Lansun Chen | 2005 | Bulletin of Mathematical Biology2005，67，1： | 1 |
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