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Transcriptome analysis of sugar beet root maggot （Tetanops myopaeformis） genes modulated by the Beta vulgaris host

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Insect Science 2018年第2期25卷 222-234页

作者： li, haiyan Smigocki, Ann C. USDA‐ARS Molecular Plant Pathology Laboratory Beltsville Maryland USA

Sugar beet root maggot （SBRM, Tetanops myopaeformis von R6der） is a major but poorly understood insect pest of sugar beet （Beta vulgaris L.）. The molecular mecha- nisms underlying plant defense responses are well documented, however, little information is available about complementary mechanisms for insect adaptive responses to overcome host resistance. To date, no studies have been published on SBRM gene expression pro- filing. Suppressive subtractive hybridization （SSH） generated more than 300 SBRM ESTs differentially expressed in the interaction of the pest with a moderately resistant （F1016） and a susceptible （F1010） sugar beet line. Blast2GO v. 3.2 search indicated that over 40% of the differentially expressed genes had known functions, primarily driven by fruit fly D. melanogaster genes. Expression patterns of 18 selected EST clones were confirmed by RT-PCR analysis. Gene Ontology （GO） analysis predicted a dominance of metabolic and catalytic genes involved in the interaction of SBRM with its host. SBRM genes function- ing during development, regulation, cellular process, signaling and under stress conditions were annotated. SBRM genes that were common or unique in response to resistant or susceptible interactions with the host were identified and their possible roles in insect responses to the host are discussed.

关键词： Beta vulgaris resistant sugar beet root maggot suppressive subtractivehybridization susceptible transcriptome

基于Meta分析的黑龙江省水稻水土肥资源协同优化调配

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农业机械学报 2024年第5期55卷 302-311页

作者：李茉薛敏沙炎李海燕陈颖珊东北农业大学水利与土木工程学院哈尔滨150030 智慧农场技术与系统全国重点实验室哈尔滨150030

水稻灌溉水量、氮肥和种植面积的高效管理有助于提升农业经济效益,提高资源利用效率和改善生态环境。以黑龙江省13个市(区)为研究区域,利用Meta分析量化不同灌溉方式和施氮量对水稻产量和温室气体(CO_(2)、CH_(4)、N_(2)O)排放的影响,... 详细信息

水稻灌溉水量、氮肥和种植面积的高效管理有助于提升农业经济效益,提高资源利用效率和改善生态环境。以黑龙江省13个市(区)为研究区域,利用Meta分析量化不同灌溉方式和施氮量对水稻产量和温室气体(CO_(2)、CH_(4)、N_(2)O)排放的影响,并建立水肥生产函数。在此基础上,以经济效益、温室气体排放量、水肥利用效率为目标函数构建多目标优化模型,以优化分配各地区的水肥资源,调整水稻种植面积。优化结果表明:控制灌溉和施加氮肥不同程度影响产量和温室气体排放,优化后水稻种植面积减少3.76%,水利用效率提高18.4%,灌溉水量均值为4513.54 m^(3)/hm^(2),氮肥施用量减少11%,氮肥利用效率提高32%,氮肥施用量均值为100 kg/hm^(2);经济效益增加8.1%,温室气体排放降低10.6%。本模型可以量化表征区域尺度基于控制灌溉的水肥施用与产量及温室气体排放的响应关系,协同优化稻田水土肥资源最佳配比,平衡经济、温室气体排放和资源利用效率,有助于黑龙江省水稻不同目标间的水肥资源优化和种植面积调整,促进农业可持续发展,可为水稻水土肥资源优化与管理提供参考。

关键词：水稻控制灌溉 Meta分析水肥耦合多目标非线性优化模型

Study on physical and mechanical properties of cement asphalt emulsified mortar under track slab

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Railway Sciences 2024年第2期3卷 227-238页

作者： Tao Wang Shaoliang Wu Hengqiong Jia Shanqing Peng haiyan li Piyan Shao Zhao Wei Yi Shi China Academy of Railway Sciences Corporation limited Metals and Chemistry Research InstituteBeijingChina

Purpose–During the construction process of the China Railway Track System(CRTS)I type filling layer,the nonwoven fabric bags have been used as grouting templates for cement asphalt(CA)emulsified mortar.The porous structure of nonwoven fabrics endowed the templates with breathability and water permeability.The standard requires that the volume expansion rate of CA mortar must be controlled within 1%–3%,which can generate expansion pressure to ensure that the cavities under track slabs are filled fully.However,the expansion pressure caused some of the water to seep out from the periphery of the filling bag,and it would affect the actual mix proportion of CA mortar.The differences in physical and mechanical properties between the CA mortar under track slabs and the CA mortar formed in the laboratory were studied in this paper.The relevant results could provide important methods for the research of filling layer materials for CRTS I type and other types of ballastless tracks in China.Design/methodology/approach–During the inspection of filling layer,the samples of CA mortar from different working conditions and raw materials were taken by uncovering the track slabs and drilling cores.The physical and mechanical properties of CA mortar under the filling layer of the slab were systematically analyzed by testing the electrical flux,compressive strength and density of mortar in different parts of the filling layer.Findings–In this paper,the electric flux,the physical properties and mechanical properties of different parts of CA mortar under the track slab were investigated.The results showed that the density,electric flux and compressive strength of CA mortar were affected by the composition of raw materials for dry powders and different parts of the filling layer.In addition,the electrical flux of CA mortar gradually decreased within 90 days’age.The electrical flux of samples with the thickness of 54 mm was lower than 500 C.Therefore,the impermeability and durability of CA mortar could be improved by increasing the thic

关键词： CA mortar Electric flux Compressive strength Density

Polarimetric entropy of the ocean surface with a two-scale scattering model

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Acta Oceanologica Sinica 2014年第1期33卷 102-108页

作者： WANG Wenguang li haiyan SONG Xingai School of Electronic and Information Engineering Beihang University Key Laboratory of Computational Geodynamics Chinese Academy of Sciences University of the Chinese Academy of Sciences National Satellite Ocean Application Service State Oceanic Administration

The relationships among an ocean wave spectrum,a fully polarimetric coherence matrix,and radar parameters are deduced with an electromagnetic wave theory.Furthermore,the relationship between the polarimetric entropy and ocean wave spectrum is established based on the definition of entropy and a twoscale scattering model of the ocean surface.It is the first time that the polarimetric entropy of the ocean surface is presented in theory.Meanwhile,the relationships among the fully polarimetric entropy and the parameters related to radar and ocean are discussed.The study is the basis of further monitoring targets on the ocean surface and deriving oceanic information with the entropy from the ocean surface.The contrast enhancement between human-made targets and the ocean surface with the entropy is presented with quad-pol airborne synthetic aperture radar（AIRSAR） data.

关键词： entropy ocean wave spectrum polarimetric synthetic aperture radar Polsar two-scale scattering mode contrast enhancement

Oil spill detection on the ocean surface using hybrid polarimetric SAR imagery

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Science China Earth Sciences 2016年第2期59卷 249-257页

作者： li haiyan PERRIE William ZHOU YuanZe HE YiJun Key Laboratory of Computational Geodynamics Chinese Academy of Sciences College of Earth Sciences University of Chinese Academy of Sciences Fisheries and Oceans Canada Bedford Institute of Oceanography School of Marine Sciences Nanjing University of Information Science and Technology

Hybrid-polarimetric SAR(synthetic aperture radar) is a new SAR mode, with relatively simple architecture, low cost, and wide swath, which will be carried by several Earth-observing systems from now to the near future. Here, we show how the second Stokes parameter of hybrid-polarimetric SAR can be employed to detect oil on the ocean surface using the classic well-known Otsu threshold methodology, in relation to contributions from different polarizations and dampening effects on backscatter intensity, neglecting the specific scattering mechanisms and oil types for an oil-covered surface. The detection methodology is demonstrated to be reliable in three example cases: oil-on-water experiments conducted by the Norwegian Clean Seas Association, natural oil seeps from the Gulf of Mexico, and observations from the Deep Water Horizon oil spill disaster in 2010.

关键词：合成孔径雷达图像极化SAR 检测海面溢油混合地球观测系统海洋表面后向散射强度

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从一道高考题谈利用雄性不育系生产杂交种子

生物学教学 2024年第2期49卷 87-88页

作者：李海燕山东省阳信县第一中学滨州251800

以一道利用雄性不育系生产杂交种子的高考题引发的思考为切入点,阐明利用雄性不育系批量生产杂交种子的技术原理,提出利用转基因技术生产杂交种的技术要点仍是选育不育系、保持系和恢复系并年年留种,为生物学教学提供有价值的参考。

关键词：杂交种雄性不育保持系恢复系转基因

医用高分子微针在非透皮局部给药中的研究进展

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生物医学工程学杂志 2024年第2期41卷 406-412,420页

作者：李海艳韩宏娟王璐姚婧芝肖文谦(综述) 李波(审校) 重庆科技大学、纳微复合材料与器件重庆市重点实验室重庆401331

微针是一种具有广阔发展前景的新型局部给药系统,因具有能够迅速穿透组织屏障、实现局部定点和靶向给药等优点,其应用也逐步扩展到非透皮的给药领域,可以为组织或器官的疾病或损伤提供快速、有效的治疗手段。经过文献检索发现医用高分... 详细信息

微针是一种具有广阔发展前景的新型局部给药系统,因具有能够迅速穿透组织屏障、实现局部定点和靶向给药等优点,其应用也逐步扩展到非透皮的给药领域,可以为组织或器官的疾病或损伤提供快速、有效的治疗手段。经过文献检索发现医用高分子微针在非透皮给药的最新应用进展还缺乏归纳和总结,本文首先阐述了相关微针的制备材料及制造技术,接着对微针在非透皮给药领域中的典型应用进行了综述,主要涉及口腔、眼部、血管和心脏等组织或器官疾病的治疗及修复,最后总结现阶段微针在非透皮给药中存在的问题,对其发展进行了展望,以供相关领域的研究者借鉴与参考。

关键词：微针非透皮药物递送

a-Wythoff＇s Game with n Players

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Wuhan University Journal of Natural Sciences 2017年第1期22卷 57-62页

作者： li haiyan liU Sanyang School of Mathematics and Statistics Xidian UniversityXi'an 710071 Shaanxi China

Letting a = 1 in a-Wythoff ＇s game introduced by Fraenkel yields Wythoff＇s game which is a well-known 2-player impartial combinatorial game introduced by Wythoff in 1907.A method of solving n-player impartial games was presented by Krawec in 2012.In this paper,we employ Krawec＇s function to analyze n〉2 players a-Wythoff ＇s game and obtain game values for all a ≥1.The results obtained cover n-player Wythoff ＇s game,a special case 1-Wythoff ＇s game.

关键词： combinatorial games Wythoff＇s game Sprague-Grundy function

Mineral magnetic properties of surface sediments at Bei’anhe, Beijing, and its environmental significance

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Chinese Science Bulletin 2008年第16期53卷 2536-2546页

作者： WANG HongQiang ZHANG ShiHong li haiyan State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China Institute of Geophysics China Earthquake Administration Beijing 100081 China

A multiparameter investigation of surface sediments from the Bei’anhe section (Beijing) has been con- ducted using environmental magnetic approaches. The studied sedimentary sequence consists of pluvial and lacustrine silts and clay of the Holocene age. Magnetite, hematite and pyrrhotite were iden- tified as the dominant magnetic minerals. The mineral magnetic characteristics are considered to re- flect the Holocene paleoenvironmental processes of the studied area, which are different from the mineral magnetic properties of typical polluted sections reported in the Beijing area. The low-field magnetic susceptibility and saturated isothermal remanence magnetization of the section decrease gradually with increasing depth. This indicates that the concentration of magnetic minerals in the strata decreases down the section. Values of interparametric ratios, such as ARM/SIRM, χARM/χ and SIRM/χ, gradually increase with increasing depth, which indicates a down-section decreasing trend in the magnetic grain size of the sediments. Pyrrhotite occurs below the depth of 22 cm, suggesting the ex- istence of redox interface. The magnetic variations of the Bei’anhe surface sediments might be con- trolled by two geological processes: reductive diagenesis and pedogenesis. Our findings may have provided a reference point for magnetic investigation of polluted surface sediments in the Beijing area.

关键词：矿石磁性表面沉积物环境