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一种新的波达估计方法

电子科技大学学报 2007年第5期36卷 918-920页

作者：靳天玉吕振肃吕鑫兰州大学信息科学与工程学院兰州730000

分析了目前常用的波达角估计算法,研究了等距线阵和圆阵的特点,指出其存在关于横轴镜像对称信号源的空间模糊性,利用等距t型阵克服了这一困难。提出了一种新的基于训练序列波角达估计新算法,新算法基于如下假设:各个信号源的训练序列互... 详细信息

分析了目前常用的波达角估计算法,研究了等距线阵和圆阵的特点,指出其存在关于横轴镜像对称信号源的空间模糊性,利用等距t型阵克服了这一困难。提出了一种新的基于训练序列波角达估计新算法,新算法基于如下假设:各个信号源的训练序列互相正交,并且各个信号源都是幅度为1的恒模信号。该文给出了新算法的数学推导过程,得到一个简单的波达角估计公式。应用Matlab对新算法进行了仿真,仿真结果表明新算法能够快速、精确地估计波达方向。

关键词：天线阵列阵列信号信号源盲分离波达估计

Statistical study of small-scale magnetic holes in the upstream regime of the Martian bow shock

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Statistical study of small-scale magnetic holes in the upstr...

Impacts of Soil Additives on Crop Yield and C-Sequestration in Post Mine Substrates of lusatia,Germany

作者： G.q.Wang M.Volwerk A.M.Du S.D.Xiao M.Y.Wu Y.q.Chen t.l.Zhang

Small-scale magnetic holes(SSMHs) are frequently observed in the solar wind at 1 Au as well as the terrestrial current sheet and *** kinetic-size structures play an important role in energy dissipation and particle ***,we report the existence of SSMHs in the upstream regime of the Martian bow shock and statistically investigate these SSMHs based on 5-year observations of the Mars Atmosphere and Volatile EvolutioN(MAVEN) spacecraft.A total of 549 SSMHs are found,

关键词： Statistical study of small-scale magnetic holes in the upstream regime of the Martian bow shock

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Pedosphere 2012年第3期22卷 343-350页

作者： A.RODIONOV S.NII-ANNANG O.BENS M.tRIMBORN S.SCHIllEM B.u.SCHNEIDER t.RAAB R.F.Httl Institute of Crop Science and Resource Conservation University of BonnBonn 53115 (Germany) Faculty of Environmental Science and Process Engineering Brandenburg University of TechnologyCottbus 03046 (Ger-many) German Research Centre for Geosciences GFZ Potsdam 14473 (Germany)

Opencast lignite mining in the lusatia region of Germany has resulted in large scale landscape disturbances, which require suitable recultivation techniques in order to promote plant growth and establishment in the remaining nutrient-poor substrates with low water-holding capacity. thus, the effects of two commercial soil additives （CSA）, a hydrophilic polymer mixed with volcanic rock flour and bentonite （a-CSA）, and digester solids from biogas plants enriched with humic acids and bentonite （b-CSA）, on soil organic carbon （SOC） storage, plant yields and root biomass were assessed after cultivating perennial crops （Dactylis 9lornerata l.） in monoculture and Helianthus annuus l.-Brassica napus l. in crop rotation systems. the CSA were incorporated into the top 20 cm soil depth using a rotary spader. the results indicated that a-CSA led to a significant increase in plant yield during the first year, and improved root biomass in the following year. As a result, SOC stocks increased, especially in the 0 10 cm soil layer. No significant sequestration of additional SOC was observed on b-CSA-amended plots at the end of both years. Bulk density values decreased in all treatments under the monoculture system. It can be concluded that application of a-CSA enhanced soil water availability for plant uptake and consequently promoted plant growth and organic carbon sequestration. the relative enrichment of organic matter without effects on water-holding capacities of b-CSA treatments suggested that it was not suitable for rapid land reclamation.

关键词： bulk density organic C inputs polyacrylate soil organic carbon water-holding capacity

Investigation of negative-parity states in ^(16)C via deuteron inelastic scattering

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Chinese Physics C 2022年第5期46卷 70-76页

作者： Z.W.tan J.l.lou Y.l.Ye Y.liu D.Y.Pang C.X.Yuan J.G.li W.liu Y.Jiang B.Yang l.C.tao K.Ma Z.H.li q.t.li X.F.Yang J.Y.Xu H.Z.Yu J.X.Han S.W.Bai S.W.Huang G.li H.Y.Wu H.l.Zang J.Feng J.S.Wang Y.Y.Yang P.Ma q.Hu Z.Bai Z.H.Gao F.F.Duan l.Y.Hu J.H.tan S.q.Sun Y.S.Song H.J.Ong D.t.tran H.Y.Zhu B.l.Xia School of Physics and State Key laboratory of Nuclear Physics and technology Peking UniversityBeijing 100871China School of Physics Beijing Key Laboratory of Advanced Nuclear Materials and PhysicsBeihang UniversityBeijing 100191China Sino-French Institute of Nuclear Engineering and technology Sun Yat-Sen UniversityZhuhai 519082China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Fundamental Science on Nuclear Safety and Simulation technology laboratory Harbin Engineering UniversityHarbin 150001China Research Center for Nuclear Physics Osaka universityOsaka 567-0047Japan Institute of Physics Vietnam Academy of Science and TechnologyHanoi 10000Vietnam Institute of Materials China Academy of Engineering PhysicsMianyang 621907China

two low-lying unbound states in ^(16)C are investigated by deuteron inelastic scattering in inverse *** the 2^(-) state at 5.45 MeV previously measured in a 1n knockout reaction,a new resonant state at 6.89 MeV is observed for the first *** inelastic scattering angular distributions of these two states are well reproduced by the distorted-wave Born approximation(DWBA)calculation with an l=1 *** addition,the spinparities of the unbound states are discussed and tentatively assigned based on shell model calculations using the modified YSOX interaction.

关键词： negative-parity states inelastic scattering ^(16)C

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何首乌愈伤组织诱导和植株再生

植物生理学通讯 2000年第4期36卷 335-336页

作者：邱奉同临沂师范学院生物系山东临沂276005

1 植物名称何首乌(Polygonm multiflorum)。2 材料类别蒙山阳坡路旁野生植株上的嫩芽。3 培养条件诱导愈伤组织培养基：(1)MS+6-BA 1mg·l-1(单位不同)+NAA 1；(2)MS+6-BA 2+NAA 1；(3)1/2MS+NAA 0.3；(4)1/2MS+2,4-D 0.1；(5)... 详细信息

1 植物名称何首乌(Polygonm multiflorum)。2 材料类别蒙山阳坡路旁野生植株上的嫩芽。3 培养条件诱导愈伤组织培养基：(1)MS+6-BA 1mg·l-1(单位不同)+NAA 1；(2)MS+6-BA 2+NAA 1；(3)1/2MS+NAA 0.3；(4)1/2MS+2,4-D 0.1；(5)1/2MS+2,4-D 0.3；(6)1/2MS+2,4-D 1；(7)MS+6-BA 3+2,4-D 1。芽分化培养基：(8)MS+6-BA 1；(9)MS+6-BA 2；(10)MS+6-BA 5+NAA 0.1；(11)MS+6-BA 2+NAA 0.4；(12)MS+6-BA 3+NAA 0.1；(13)MS+6-BA 1+Kt 1+NAA 0.5；(14)MS+6-BA 1+Kt 1+NAA 1。生根培养基：(15)1/2MS；(16)1/2 MS+NAA 0.1；(17)1/2MS+NAA 0.25；(18)MS。以上培养基中的蔗糖含量除生根培养基(12)、(13)、(14)为15 g·l-1外，均为30 g·l-1；pH 5.8～6.0。培养温度(25±1)℃，照光12 h·d-1，光照度1 500～2 000 lx。

关键词：何首乌愈伤组织诱导植株再生

Development and test of a multifactorial parameterization scheme of land surface aerodynamic roughness length for flat land surfaces with short vegetation

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Science China Earth Sciences 2016年第11期59卷 281-295页

作者： ZHANG qiang YAO tong YuE Ping Institute of Arid Meteorology of CMA Key laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province Key Open laboratory of Arid Climatic Change and Disaster Reduction of CMA Lanzhou 730020 China Meteorological Bureau of Gansu Lanzhou 730020 China College of Atmospheric Sciences Lanzhou University Lanzhou 730000 China

Aerodynamic roughness length is an important physical parameter in atmospheric numerical models and microme- teorological calculations, the accuracy of which can affect numerical model performance and the level of micrometeorological computations. Many factors influence the aerodynamic roughness length, but formulas for its parameterization often only con- sider the action of a single factor. this limits their adaptive capacity and often introduces considerable errors in the estimation of land surface momentum flux （friction velocity）. In this study, based on research into the parameterization relations between aerodynamic roughness length and influencing factors such as windrow conditions, thermodynamic characteristics of the sur- face layer, natural rhythm of vegetation growth, ecological effects of interannual fluctuations of precipitation, and vegetation type, an aerodynamic roughness length parameterization scheme was established. this considers almost all the factors that af- fect aerodynamic roughness length on flat land surfaces with short vegetation. Furthermore, using many years＇ data recorded at the Semi-Arid Climate and Environment Observatory of lanzhou university, a comparative analysis of the application of the proposed parameterization scheme and other experimental schemes was performed. It was found that the error in the friction velocity estimated by the proposed parameterization scheme was considerably less than that estimated using a constant aero- dynamic roughness length and by the other parameterization schemes. Compared with the friction velocity estimated using a constant aerodynamic roughness length, the correlation coefficient with the observed friction velocity increased from 0.752 to 0.937, and the standard deviation and deviation decreased by about 20% and 80%, respectively. Its mean value differed from the observed value by only 0.004 m s-l and the relative error was only about 1.6%, which indicates a significant decrease in the estima

关键词： Flat land surface with short vegetation Multifactorial influence Aerodynamic roughness length Parameterizationscheme Friction velocity

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Comprehensive Proteomic Analysis of lysine Acetylation in the Spirometra erinaceieuropaei

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Comprehensive Proteomic Analysis of Lysine Acetylation in th...

Cyto-protective Effects of Extracts of Panax quinquefolius

2021中国畜牧兽医学会兽医寄生虫学分会第16次学术研讨会

作者： liu,W Gong,t.F He,J.l li,F tan,l li,G.q liu,Y.S

Spirometra erinaceieuropaei is a food-borne zoonotic parasite that seriously endangers human *** has been reported mainly in Southeast Asia,Europe,America. and *** genome,transcriptome,and proteome have been published in public databases,partially providing molecular basis for understanding the biology,host-parasite interactions,and ***,the presence of post-translational modifications such as phosphorylation and acetylation limit the further study of ***,we conducted a large-scale analysis of the lysine acetylation proteome of *** to explore the mechanism of the acetylation modification.A total of 390 acetylated proteins and 655 acetylated sites were identified and the functions were predicted following *** results show that proteins involved in energy metabolism(tricarboxylic acid cycle and glycolysis) had higher acetylation *** structural domains of acetylated proteins were significantly enriched by histone related structural domains,EF-hand,Zinc figure,NAD(P)-binding,Globin,myosin tail,pleckstrin,and other *** terms of localization,these acetylated proteins mainly exist in the cytoplasm,followed by mitochondria,nucleus,extracellular matrix and plasma *** study is the first time to analyze the acetylated proteome of *** will shed light on further study on the biological function of acetylated proteins in *** and identification of potential biomarker.

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Cyto-protective Effects of Extracts of Panax Quinquefolius

Comparative Study on Combustion Performance of Petroleum Coke, Hejin Coal and Shenmu Coal

第十四届全国中药和天然药物学术研讨会

作者： EMK lui l.Pereira J.Ma q Zhang t.Fatima S.lee I Welch Ontario Ginseng Innovation Research Consortium Western University

＜正＞Ginseng is known to have anti-oxidative anti-inflammatory *** our study we have examined extracts derived from Ontario grown Panax quinquefolius for its cyto-protective and immunomodulatory effects in two experi...

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Journal of Energy and Power Engineering 2011年第2期5卷 135-141页

作者： W.Y. Dou q.l. Zhou Y.H. li t.M. Xu S.E. Hui China Special Equipment Inspection and Research Institute Beoing 100013 China State Key laboratory of Multiphase Flow in Power Engineering Xi＇an Jiaotong University Xi＇an 710049 China

the effects of three factors on combustion performance of petroleum coke, Herin Coal and Shenmu Coal have been studied, including the ratio of primary air, excess air factor, and the swirling intensity of outer secondary air. the experiments were carried out on a one-dimensional furnace with dual channel swirling burner, in which temperature of center furnace, emission of air pollutants, and burn-out rate of fuel were measured. the results provide the optimal ratio of primary air, excess air factor and swirling intensity of outer secondary air for the fuels. the combustion performance of petroleum coke B is much better than petroleum coke A, but worse than Hejin coal and Shenmu coal. In addition, the burn-out rate of petroleum coke depends much more on the temperature in terminal stage of combustion than in the early stage of combustion.

关键词： Combustion performance petroleum coke Hejin coal Shenmu coal comparative study