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武汉市汉南区土壤有机质和养分时空变异研究

中国土壤与肥料 2014年第4期 24-28页

作者：刘东海李双来陈云峰何绍华胡诚彭珍东乔艳魏仁茂湖北省农业科学院植保土肥研究所湖北武汉430064 武汉市汉南区农业局湖北武汉430090

运用经典统计学及地统计学方法，研究汉南区土壤有机质和养分含量的空间变异特征。结果表明：碱解氮、有效磷、速效钾和有机质含量为中等水平，均服从正态分布；碱解氮和有机质符合球形模型，有效磷和速效钾符合指数模型。碱解氮和有机... 详细信息

运用经典统计学及地统计学方法，研究汉南区土壤有机质和养分含量的空间变异特征。结果表明：碱解氮、有效磷、速效钾和有机质含量为中等水平，均服从正态分布；碱解氮和有机质符合球形模型，有效磷和速效钾符合指数模型。碱解氮和有机质的块金效应均在25%-75%之间，表明系统具有中等空间相关性。有效磷和速效钾块金效应均＆lt;25%，表明系统具有强烈空间相关性。在地理信息系统（ GIS）支持下，通过Kriging插值研究发现4种养分空间分布大体趋势是，东荆街办养分含量高，湘口街办和纱帽街办次之，邓南街办最低。从1980到2010年， pH值基本没有变化，有机质有降低的趋势，有效磷存在大幅提升，速效钾含量先大幅降低，后有所回升。培肥措施应为补施有机肥，稳施氮肥，优化磷、钾肥。

关键词：汉南 GIS 空间变异时间演变

The Role of Calcium in Mediating SliAAs Expression in Tomato Pedicel Explants

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Agricultural Sciences in China 2010年第7期9卷 980-984页

作者： ZUO Xian-hong XU Tao QI Ming-fang LU shuang-shuang li Jin-hong li Hong GAO Song li Tian-lai Key Laboratory of Protected Horticulture of liaoning Province/College of Horticulture Shenyang Agricultural University Shenyang 110161 P.R. China

In order to illuminate the effect of calcium on the IAA signal transduction,we studied the expression of eight SliAA genes which were up-regulated by calcium during the abscission after short-term（1 h） and long-term（16 h） treatments with calcium,IAA and calcium *** results indicated that calcium induced SliAAs expression in 1 h at low concentration,EGTA affected little SliAAs expression;it also increased IAA-induced transcript level of SliAAs,TFP（named trifluoperazine） decreased most SliAAs expression below the level of calcium combined with IAA-induced expression,except for ***-term treatment of calcium or calcium inhibitors suppressed some SliAAs expression,whereas TFP enhanced all SliAAs ***,SliAA29 was induced by most treatments excluding 16 h EGTA.

关键词： tomato calcium IAA calcium inhibitors SIlAA gene

Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai li Zhen Ma Jin-Hua Gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

不同施肥处理对小麦根际土壤真菌多样性及根腐病的影响

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湖北农业科学 2020年第21期59卷 30-34,50页

作者：刘东海张学江王鹏胡诚乔艳张智李双来湖北省农业科学院植保土肥研究所武汉430064 枣阳市农业技术推广中心湖北枣阳441200

设置不施肥(T1)、习惯施肥(T2)、推荐施肥(T3)和有机肥替代50%化肥(T4)4个处理,旨在研究不同施肥对小麦(Triticum aestivum L.)根际土壤真菌多样性及根腐病的影响。结果表明,不同施肥处理小麦根系活力从大到小依次为T4、T3、T2、T1。T3... 详细信息

设置不施肥(T1)、习惯施肥(T2)、推荐施肥(T3)和有机肥替代50%化肥(T4)4个处理,旨在研究不同施肥对小麦(Triticum aestivum L.)根际土壤真菌多样性及根腐病的影响。结果表明,不同施肥处理小麦根系活力从大到小依次为T4、T3、T2、T1。T3处理平均产量为5 878.95 kg/hm^2,比T2处理仅减少66.45kg/hm^2,比T4处理增产1 111.80 kg/hm^2。施用化肥降低了土壤pH以及真菌群落的丰富度和多样性,改变了真菌群落结构。禾谷镰刀菌的相对丰度从大到小依次为T2、T4、T3、T1,麦根腐平脐蠕孢的相对丰度和根腐病病情指数均表现为T4较低。因此,在推荐施肥量下,适当降低有机肥替代化肥的比例才能保障产量,同时降低根腐病发病率。

关键词：小麦(Triticum aestivum L.) 根际土壤真菌多样性根腐病

Curtailing Carbon Usage with Addition of Functionalized NiFe2O4 Quantum Dots:Toward More Practical S Cathodes for li-S Cells

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Nano-Micro Letters 2020年第11期12卷 1-12页

作者： Ning li Ting Meng lai Ma Han Zhang JiaJia Yao Maowen Xu Chang Ming li Jian Jiang School of Materials and Energy and Chongqing Key Lab for Advanced Materials and Clean Energies of TechnologiesSouthwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715People’s Republic of China School of Physical Science and Technology Southwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715People’s Republic of China

Smartcombination of manifold carbonaceous materials with admirable functionalities(like full of pores/functional groups,high specific surface area) is still a mainstream/preferential way to address knotty issues of polysulfides dissolution/shuttling and poor electrical conductivity for S-based ***,extensive use of conductive carbon fillers in cell designs/technology would induce electrolytic overconsumption and thereby shelve high-energy-density promise of li-S *** cut down carbon usage,we propose the incorporation of multi-functionalized NiFe2O4 quantum dots(QDs) as affordable additive *** total carbon content can be greatly curtailed from 26%(in traditional S/C cathodes) to a low/commercial mass ratio(~5%).Particularly,note that NiFe2O4 QDs additives own superb chemisorption interactions with soluble li2Sn molecules and proper catalytic features facilitating polysulfide phase conversions and can also strengthen charge-transfer capability/redox kinetics of overall cathode *** from these intrinsic properties,such hybrid cathodes demonstrate prominent rate behaviors(decent capacity retention with ~526 mAh g^-1 even at 5 A g^-1) and stable cyclic performance in liNO3-free electrolytes(only ~0.08% capacity decay per cycle in 500 cycles at 0.2 A g^-1).This work may arouse tremendous research interest in seeking other alternative QDs and offer an economical/more applicable methodology to construct low-carbon-content electrodes for practical usage.

关键词： Carbon usage reduction NiFe_2O_4 quantum dots Additive substitute Practical S cathode li-S cells

Effect of rare earth elements(La,Y,Pr)in multi-element composite perovskite oxide supports for ammonia synthesis

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Journal of Rare Earths 2021年第4期39卷 427-433页

作者： Wei li shuang Wang Jinping li Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization College of Chemistry and Chemical EngineeringTaiyuan University of TechnologyTaiyuan 030024China College of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China

A series of BaCe0_(3)modified with different rare earth elements(La,Y,Pr)were synthesized by coprecipitation and calcination and the effect of rare earth elements for catalytic ammonia synthesis under mild conditions was *** ammonia synthesis performance tests show that 2.5%Ru/BaCe_(0.9)La_(0.1)O_(3-δ)catalyst(All the percentages of Ru in this article are in mass fraction)exhibits the highest ammonia synthesis rate(34 mmol/(g·h))at 3 MPa,450℃,and no sign of deactivation after 100 h of reaction.H_(2)-TPR and XPS analyses indicate that the introduction of La increases the amount of oxygen vacancies of the catalyst,which is beneficial to increasing the electron density of Ru *** analysis shows that the Ru particle size is reduced greatly after La is introduced,which facilitates the catalyst generating more Bs-type sites(active sites of Ru species for N=N dissociation).CO_(2)-TPD analysis indicates that BaCe_(0.9)La_(0.1)O_(3-δ)has stronger basicity,which promotes electrons transfer from support to *** work provides an effective method for design and synthesis of Ru-based multi-element composite perovskite oxide catalysts.

关键词： Ammonia synthesis Ru-based catalyst Perovskite oxide Rare earth element(REE) Oxygen vacancies

A high-resolution gas-kinetic scheme with minimized dispersion and controllable dissipation reconstruction

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Science China(Physics,Mechanics & Astronomy) 2017年第11期60卷 50-67页

作者： shuang Tan QiBing li Department of Engineering Mechanics Tsinghua University

In order to simulate multiscale problems such as turbulent flows effectively, the high-order accurate reconstruction based on minimized dispersion and controllable dissipation(MDCD) is implemented in the second-order accurate gas-kinetic scheme(GKS) to improve the accuracy and resolution. MDCD is firstly extended to non-uniform grids through the modification of dissipation and dispersion coefficients for uniform grids based on the local stretch ratio. Remarkable improvements in accuracy and resolution are achieved on general grids. Then a new scheme, MDCD-GKS is constructed, with the help of MDCD reconstruction, not only for conservative variables, but also for their gradients. MDCD-GKS shows good accuracy and efficiency in typical numerical ***-GKS is also coupled with the improved delayed detached-eddy simulation(IDDES) hybrid model and applied in the fine simulation of turbulent flow around a cylinder, and the prediction is in good agreement with experiments when using the relatively coarse grid. The high accuracy and resolution of the developed GKS guarantee its high efficiency in practical applications.

关键词： GKS MDCD high-resolution non-uniform grid turbulence simulation

Definition and Classification of Low-Resistivity Oil Zones

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Journal of China University of Mining and Technology 2006年第2期16卷 228-232页

作者： liU shuang-lian liU Jun-lai li Hao ZHOU Yong-sheng State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China Key Laboratory of lithosphere Tectonics and lithoprobing Techology of Ministry of Education China University of Geosciences Beijing 100083 China Exploration and Production Research Institute SINOPEC Beijing 100083 China China University of Petroleum Beijing 102249 China Exploration and Production Research Institute PetroChina Beijing 100083 China

Although the analysis of the microcosmic mechanism for low-resistivity oil zones has received much attention in China, the intrinsic relationship between low-resistivity oil zones and geological background is still under-developed. Based on the geology and logging analysis, we redefine low-resistivity oil zones. According to their genesis, low-resis- tivity oil zones can be distinguished as five different classes: low-resistivity oil zones formed by tectonic settings, by depositional settings, by diagenetic settings, by invaded settings and those which are formed by the compounding geneses respectively. We make the following observations from this study on the definition and classification of low-resistivity oil zones: 1) A low-resistivity oil reservoir has macroscopic and microscopic unity. 2) The genesis of low-resistivity oil zones varies with the type of petroliferous basin. 3) Some low-resistivity oil zones can be forecasted based on the geological study results. 4) The results in this paper suggest that well logging information is generated from two cause mechanisms, the geophysical factors and the geological setting. Future studies on the geological background cause mechanism and the theory of well logging information will enrich the theory of logging geology and improve the ability to forecast oil zones.

关键词： low-resistivity oil zone geologic background genesis classification

State of the art and prospects of structured sensing matrices in compressed sensing

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Frontiers of Computer Science 2015年第5期9卷 665-677页

作者： Kezhi li shuang CONG Automatic Complex Communication Networks Signal and Systems Center Royal Institute of Technology (KTH) Stockholm 10044 Sweden Department of Automation University of Science and Technology of China Hefei 230027 China

Compressed sensing （CS） enables people to acquire the compressed measurements directly and recover sparse or compressible signals faithfully even when the sampiing rate is much lower than the Nyquist rate. However, the pure random sensing matrices usually require huge memory for storage and high computational cost for signal reconstruction. Many structured sensing matrices have been proposed recently to simplify the sensing scheme and the hardware implementation in practice. Based on the restricted isometry property and coherence, couples of existing structured sensing matrices are reviewed in this paper, which have special structures, high recovery performance, and many advantages such as the simple construction, fast calculation and easy hardware implementation. The number of measurements and the universality of different structure matrices are compared.

关键词： compressed sensing structured sensing matrices RIP coherence