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湖南植烟水稻土碱解氮分布特征及其影响因素

土壤 2024年第3期56卷 503-509页

作者：金江华李旭秦凌全柯颖智磊于大鹏吴文信李思军夏冰邓小华吉林烟草工业有限责任公司吉林延吉133000 湖南省烟草公司永州市公司湖南永州425000 湖南农业大学农学院长沙410128 湖南省烟草公司郴州市公司湖南郴州423000

为明确湖南植烟水稻土碱解氮含量、空间分布和影响因素,检测了2698个耕层土壤样本的碱解氮含量,分析了其空间分布特征及丰缺状况,探讨了其与种植制度、耕层厚度、海拔和土壤pH、有机质、颗粒组成之间的关系。土壤碱解氮变幅为57.10~447.... 详细信息

为明确湖南植烟水稻土碱解氮含量、空间分布和影响因素,检测了2698个耕层土壤样本的碱解氮含量,分析了其空间分布特征及丰缺状况,探讨了其与种植制度、耕层厚度、海拔和土壤pH、有机质、颗粒组成之间的关系。土壤碱解氮变幅为57.10~447.40 mg/kg,平均为183.78 mg/kg,碱解氮适宜(110~180 mg/kg)的样本占比为46.55%;安仁县、桂阳县和临武县等10个县(区)土壤碱解氮平均值较高,其他16县(区)都在适宜范围;土壤碱解氮空间分布有从东南向西北递减的分布趋势;烟-玉米轮作的土壤碱解氮相对较低;土壤碱解氮随耕层深度、土壤pH、有机质增加而增加,与海拔呈抛物线关系(峰值在海拔150~250 m区间),随土壤粉砂占比增加而升高,随粗砂占比增加而降低。湖南植烟水稻土碱解氮含量空间分布不均匀,且受多种因素影响,要因地制宜分区制定氮肥施用策略。

关键词：植烟土壤土壤碱解氮空间分布影响因素

Mechanically scanned leaky-wave antenna based on a topological one-way waveguide

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Frontiers of physics 2020年第3期15卷 97-103页

作者： Qian Shen Yun You Jie Xu Yun Shen xiaohua deng Zhuoyuan Wang Weidong Min Linfang Shen Sanshui Xiao Information Engineering School Nanchang UniversityNanchang330031China Institute of Space Science and Technology Nanchang UniversityNanchang330031China Department of Photonics Engineering Technical University of DenmarkDK-2800Kgs.LyngbyDenmark Electronic and Information Engineering College Ningbo University of TechnologyNingbo315016China School of Software Nanchang UniversityNanchang330031China Department of Applied Physics Zhejiang University of TechnologyHangzhou310023China

We propose a uniform backfire-to-endfire leaky-wave antenna(LWA)based on a topological one-way waveguide under external bias magnetic *** systematically analyze the dispersion,showing that the proposed structure supports leaky mode arisen from total internal *** means of tuning frequency or magnetic field,we obtain fixed-bias frequency and fixed-frequency bias LWA with continuous beam scanning from backward,broadside to forward *** importantly,we,for the first time,demonstrate that this proposed LWA shows mechanical tunability,allowing us to manipulate the radiation direction from backward,broadside to forward direction by mechanically tuning the air layer *** simulated results show that our system exhibits super low 3dB beam width,high radiation efficiency as well as high antenna *** provided such multiple controlled(especially mechanically)beam scanning manners,the present LWA paves an advanced approach for continuous beam scanning,holding a great potential for applications in modern communication and radar system.

关键词： leaky-wave antenna one-way waveguide magneto-optic materials

Multi-Fidelity Simulation of Gas Turbine Overall Performance by Directly Coupling High-Fidelity Models of Multiple Rotating Components

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Journal of Thermal Science 2024年第4期33卷 1357-1378页

作者： deng Weimin XU Yibing NI Ming WEI Zuojun GAN xiaohua REN Guangming Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen518055China School of Aerospace Engineering Tsinghua UniversityBeijing100084China Shenzhen Key Laboratory of Wide-Speed-Range and Variable-Density Continuous Wind Tunnel Shenzhen Science and Technology Innovation CommitteeShenzhen518000China

Multi-fidelity simulations incorporate computational fluid dynamics(CFD) models into a thermodynamic model,enabling the simulation of the overall performance of an entire gas turbine with high-fidelity *** iterative coupled methods rely on characteristic maps,while fully coupled methods directly incorporate high-fidelity ***,fully coupled methods face challenges in simulating rotating components,including weak convergence and complex *** address these challenges,a fully coupled method with logarithmic transformations was developed to directly integrate high-fidelity CFD models of multiple rotating *** developed fully coupled method was then applied to evaluate the overall performance of a KJ66 micro gas turbine across various off-design *** developed fully coupled method was also compared with the traditional iterative coupled ***,experimental data from ground tests were conducted to verify its *** convergence history indicated that the proposed fully coupled method exhibited stable convergence,even under far-off-design *** experimental verification demonstrated that the multi-fidelity simulation with the fully coupled method achieved high accuracy in off-design *** analysis revealed inherent differences in the coupling methods of CFD models between the developed fully coupled and traditional iterative coupled *** inherent differences provide valuable insights for reducing errors between the component-level model and CFD models in different coupling *** developed fully coupled method,introducing logarithmic transformations,offers more realistic support for the detailed and optimal design of high-fidelity rotating components within the overall performance platform of gas turbines.

关键词： multi-fidelity fully coupled method iterative coupled method gas turbine component-level model

适宜稻茬烤烟中部6片烟叶一次性采收的密集烤房烘烤工艺研究

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作物杂志 2024年第2期 158-164页

作者：李思军毕一鸣侯建林吴文信邓小强江智敏田雨农郝贤伟章程朱林夏冰邓小华湖南省烟草公司郴州市公司桂阳县分公司湖南郴州424400 浙江中烟工业有限责任公司浙江杭州310008 湖南农业大学农学院湖南长沙410128

明确适宜稻茬烤烟中部6片烟叶一次性采收的密集烤房烘烤工艺,为稻茬烤烟制定烘烤工艺提供参考。以云烟87中部烟叶为试验材料,比较分析了四步式烘烤工艺(T1)与中温中湿烘烤工艺(T2)的效果。结果表明,T1处理烤后烟叶外观质量指数、物理特... 详细信息

明确适宜稻茬烤烟中部6片烟叶一次性采收的密集烤房烘烤工艺,为稻茬烤烟制定烘烤工艺提供参考。以云烟87中部烟叶为试验材料,比较分析了四步式烘烤工艺(T1)与中温中湿烘烤工艺(T2)的效果。结果表明,T1处理烤后烟叶外观质量指数、物理特性指数、评吸质量总分、烟叶综合质量指数分别比T2处理高0.81%、3.89%、7.99%、4.57%;化学成分可用性指数低4.29%;T1处理烤后烟叶淀粉含量略高于T2处理,但绿原酸含量较T2处理高14.18%;T1较T2处理的上等烟率提高了4.62%,燃料成本降低了11.17%,能耗总成本下降了9.35%。一次性采收稻茬烤烟中部6片烟叶,采用四步式烘烤工艺可提高烤后烟叶质量、上等率和均价,降低烘烤成本,具有一定的推广价值。

关键词：稻茬烤烟中部6片烟叶一次性采收烘烤工艺烟叶质量评价

WRKY11 up-regulated dirigent expression to enhance lignin/lignans accumulation in Lilium regale Wilson during response to Fusarium wilt

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Journal of Integrative Agriculture 2024年第8期23卷 2703-2722页

作者： Jie deng Zi’e Wang Wenyun Li xiaohua Chen Diqiu Liu Faculty of Life Science and Technology Kunming University of Science and TechnologyKunming 650500China

Lilium are highly economically valuable ornamental plants that are susceptible to Fusarium wilt caused by Fusarium *** regale Wilson,a wild lily native to China,is highly resistant to *** this study,a WRKY transcription factor,WRKY11,was isolated from ***,and its function during the interaction between *** and *** was *** ectopic expression of LrWRKY11 in tobacco increased the resistance to F oxysporum,moreover,the transcriptome sequencing and UHPLC-MS/MS analysis indicated that the methyl salicylate and methyl jasmonate levels rose in LrWRKY11 transgenic tobacco,meanwhile,the expression of lignin/lignans biosynthesis-related genes including a dirigent(DiR)was *** lignin/lignans contents in LrWRKY11-transgenic tobacco also significantly increased compared with the wild-type *** addition,the resistance of *** scales in which LrWRKY11 expression was silenced by RNAi evidently decreased,and additionally,the expression of lignin/lignans biosynthesis-related genes including LrDIR1 was significantly ***,LrDIR1 and its promoter(PLrDIR1)sequence containing the W-box element were isolated from *** interaction assay indicated that LrWRKY11 specifically bound to the W-box element in PLrDIR1 and activated LrDIR1 ***,β-glucuronidase activity in the transgenic tobacco co-expressing LrWRKY11/PLrDIR1-β-glucuronidase was higher than that in transgenic tobacco expressing PLrDIR1-β-glucuronidase ***,the ectopic expression of LrDIR1 in tobacco enhanced the resistance to *** and increased the lignin/lignans *** brief,this study revealed that LrWRKY11 positively regulated *** resistance to *** through interaction with salicylic acid/jasmonic acid signaling pathways and modulating LrDIR1 expression to accumulate lignin/lignans.

关键词： Lilium regale Fusarium oxysporum WRKY transcription factor dirigent

Ion dynamics associated with substorm dipolarization fronts

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Science China Earth Sciences 2014年第10期57卷 2543-2551页

作者： FU Song Maha ASHOUR-ABDALLA deng xiaohua Mostafa EL-ALAOUI ZHOU Meng Robert L RICHARD Raymond J WALKER YUAN ZhiGang School of Electronic and Information Wuhan University Institute of Geophysics and Planetary Physics University of California Department of Physics and Astronomy University of California Institute of Space Science and Technology Nanchang University Department of Earth Planetary and Space Sciences University of California National Science Foundation

We report where and how ions are accelerated in the proximity of earthward propagating dipolarization fronts （DFs） in the magnetotail during a magnetospheric substorm on February 15, 2008. Two DFs were observed by multiple THEMIS space- craft in the near-Earth magnetotail （-10 Re）. We studied the ion dynamics associated with these DFs by comparing observed results with large scale kinetic （LSK） simulation results. The LSK simulation reproduced the sudden ion energy flux enhance- ment concurrent with the arrival of the DF at the satellite locations. We found that ions can be accelerated to more than 100 keV energy at the DF. These ions were initially non-adiabatically accelerated near magnetic reconnection site and then still non-adiabatically accelerated at the DF structure.

关键词： dipolarization front particle simulation ion acceleration

Machine Learning for Improving Stellar Image-based Alignment in Wide-field Telescopes

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Research in Astronomy and Astrophysics 2022年第1期22卷 85-95页

作者： Zhixu Wu Yiming Zhang Rongxin Tang Zhengyang Li Xiangyan Yuan Yong Xia Hua Bai Bo Li Zhou Chen Xiangqun Cui xiaohua deng Institute of Space Science and Technology Nanchang UniversityNanchang 330031China Nanjing Institute of Astronomical Optics and Technology Chinese Academy of SciencesNanjing 210042China

Stellar images will deteriorate dramatically when the sensitive elements of wide-field survey telescopes are misaligned during an observation, and active alignment is the key technology to maintain the high resolution of wide-field sky survey telescopes. Instead of traditional active alignment based on field-dependent wave front errors, this work proposes a machine learning alignment metrology based on stellar images of the scientific camera,which is more convenient and higher speed. We first theoretically confirm that the pattern of the point-spread function over the field is closely related to the misalignment status, and then the relationships are learned by twostep neural networks. After two-step active alignment, the position errors of misalignment parameters are less than5 μm for decenter and less than 5″ for tip-tilt in more than 90% of the cases. The precise alignment results indicate that this metrology provides a low-cost and high-speed solution to maintain the image quality of wide-field sky survey telescopes during observation, thus implying important significance and broad application prospects.

关键词： telescopes techniques:high angular resolution techniques:miscellneous

稻茬烤烟优化基肥和提苗肥对上部烟叶经济性状和品质的影响

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天津农业科学 2024年第4期30卷 18-23页

作者：李建华安然江智敏肖志鹏旷子扬邓小华湖南省烟草公司衡阳市公司湖南衡阳421000 浙江中烟工业有限责任公司浙江杭州310008 湖南农业大学农学院湖南长沙410128

为提高稻茬烤烟上部烟叶品质并改善其经济性状,以云烟87为试验材料,采用双因素试验,研究优化基肥(基肥中添加微生物菌剂)和优化提苗肥(提苗肥配施尿素)对烤烟经济性状、物理特性、化学成分、评吸质量的影响。结果表明:基肥添加微生物菌... 详细信息

为提高稻茬烤烟上部烟叶品质并改善其经济性状,以云烟87为试验材料,采用双因素试验,研究优化基肥(基肥中添加微生物菌剂)和优化提苗肥(提苗肥配施尿素)对烤烟经济性状、物理特性、化学成分、评吸质量的影响。结果表明:基肥添加微生物菌剂可提高上部烟叶产量与产值;提苗肥配施尿素做可提高上部烟叶单叶质量、叶片厚度、叶面积质量和总糖含量;基肥添加微生物菌剂和提苗肥配施尿素处理较基肥不添加微生物菌剂和单施烟草专用提苗肥的上部烟叶经济性状指数提高了11.53%,评吸质量总分提高了16.14%,综合效果指数提高了9.64%。综合来看,在基肥中添加微生物菌剂,并在提苗肥中适量配施尿素,有利于提高上部烟叶产量、产值和烟叶品质。

关键词：稻茬烤烟早生快发经济性状烟叶品质上部烟叶

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基于全基因组重测序对ARTP诱变的一株高产淀粉酶韩国普李斯特氏菌的关键基因研究

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应用海洋学学报 2024年第1期43卷 171-182页

作者：何伟王灵刘景川黄仕新李菁菁黄家琪龙腾吴鹏范坚强邓小华陈善义陈义强唐旭福建中烟工业有限责任公司技术中心福建厦门361021 自然资源部第三海洋研究所福建厦门361005 龙岩烟草工业有限责任公司福建龙岩364320 福建省海洋碳汇重点实验室厦门大学福建厦门361102

为提高一株海洋来源的韩国普李斯特氏菌(Priestia koreensis FS-1)产淀粉酶的能力,对该株菌采用常压室温等离子体(atmospheric and room temperature plasma, ARTP)技术进行了诱变选育。结果显示:经过诱变选育后得到一株产淀粉酶活力较... 详细信息

为提高一株海洋来源的韩国普李斯特氏菌(Priestia koreensis FS-1)产淀粉酶的能力,对该株菌采用常压室温等离子体(atmospheric and room temperature plasma, ARTP)技术进行了诱变选育。结果显示:经过诱变选育后得到一株产淀粉酶活力较原始菌株提高了90%且稳定遗传的突变菌株*** FS-103。为解析该突变菌株酶活力增加的分子机制,对突变菌株*** FS-103进行了全基因组重测序及比对分析研究。相关分析显示:首先,*** FS-103的基因组中乙酰化修饰、抗氧化作用以及同义突变相关的基因发生了遗传变异;其次,对COG(clusters of orthologous groups)功能和变异基因进行富集分析,*** FS-103转录、翻译和翻译后修饰过程相关基因均上调。经过ARTP诱变以后的突变菌株*** FS-103淀粉酶活力提升的原因是以上功能基因发生上调效应。

关键词：海洋生物学常压室温等离子体(ARTP) 韩国普李斯特氏菌淀粉酶全基因组重测序