|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Colonization of Bacillus cereus NJSZ-13,a species with nematicidal activity in Masson pine(Pinus massoniana Lamb.)显示文摘Bacillus cereus NJSZ-13,an endophytic bacterium with nematicidal activity,was isolated from stems of healthy Pinus elliottii Engelm.Colonization of P.massoniana Lamb.by endophytic B.cereus was studied using scanning electron microscopy and confocal laser scanning microscopy.After the plasmid p GFP78 containing the green fluorescent protein(GFP)gene was transformed into the NJSZ-13 strain,the NJSZ-13:gfp showed the same nematicidal activity and growth curve as the wild-type strain,and the plasmid p GFP78 was stably maintained in strain NJSZ-13 for at least 96 h of bacterial cultivation on medium without antibiotics.After inoculation into Masson pine roots,colonization of the NJSZ-13:gfp strain in plant roots and stems was visualized using confocal laser scanning and the strain was enumerated in inoculated roots and stems.These results suggest that NJSZ-13:gfp is an efficient colonizer of Masson pine and can transfer vertically from roots to stems. | Liangliang Li Jiajin Tan Fengmao Chen Dejun Hao | 2020 | Journal of Forestry Research2020，31，3： | 4 |
| 2 | A UNIFIED MULTIAXIAL FATIGUE DAMAGE PARAMETER显示文摘According to the critical plane principle,a unified multiaxial fatigue damage parameteris presented based on the varying behaviour of the strains on the critical plane.Both the parameters ofthe maximum shear strain amplitude and normal strain excursion between adjacent turning points ofthe maximum shear strain on the critical plane are considered in the multiaxiaI fatigue damage parame-ter presented.An equivalent strain amplitude is made with both parameters of the maximun shearstrain amplitude and normal strain excursion by means of yon Mises criterion.Thus a new multiaxialfatigue damage model is given based on the critical plane approach.The results show that the multiaxi-al fatigue damage parameter proposed in this paper may be used under either proportional or nonpro-portional loading,and may also be reduced to a uniaxial form.It is used to predict multiaxial fatiguelife and good agreement is demonstrated by experimental data. | Shang Deguang Wang Dejun Xu Hao | 1998 | Acta Mechanica Solida Sinica1998，11，3： | 4 |
| 3 | CYCLIC HYSTERESIS ENERGY OF CARBON AND ALLOY STEELS显示文摘Based on the low-cycle fatigue tests of carbon and alloy steels,the cyclic properties ofhysteresis energy and its changing rules have been analysed.The mathematical formula ofcyclic hysteresis energy of the materials with different cyclic properties have been presented.The total absorbed energy to failure is associated with the variation of cyclic hysteresisenergy. | TONG Xiaoyan WANG Dejun XU Hao Northeast University of Technology,Shenyang,China TONG Xiaoyan P.O.Box 180,Northeast University of Technology,Shenyang 110006,China | 1990 | Acta Metallurgica Sinica(English Letters)1990，3，2： | 2 |
| 4 | Dynamic behaviors of a delayed HIV model with stage-structure显示文摘 | Pengmiao Hao Dejun Fan Junjie Wei Qinghe Liu | 2012 | Communications in Nonlinear Science and Numerical Simulation2012，，： | 1 |
| 5 | Influence of modulation ratio on structure and properties of nanoscale ZrB_2/ZrAlN multilayered coatings显示文摘ZrB2/ZrAlN multilayered coatings with various modulation ratios(t ZrB2:t ZrAlN)and constant modulation periods were prepared by magnetron sputtering system at room temperature.SEM,XRD,surface profiler and nano-indenter were employed to investigate the influences of tZ rB 2:tZrAlNon the microstructure and mechanical properties of the coatings.Sharp interfaces and nanoscale multilayered modulation were confirmed by SEM.The multilayer with modulation period of 40 nm and ratio of 3:1 displayed the highest hardness(36.4 GPa)and critical fracture load(76.477 mN)with lower stress.The polycrystalline structure and multilayered modulate structure were directly responsible for the enhanced mechanical properties. | LI DeJun 1,KANG YuanBin 1,DONG Lei 1,DENG XiangYun 1,LIU Hao 2 &SUN XueLiang 2 1College of Physics and Electronic Information Science,Tianjin Normal University,Tianjin 300387,China 2 Department of Mechanical&Materials Engineering,University of Western Ontario,London ON,Canada | 2010 | Science China(Technological Sciences)2010，53，3： | 1 |
| 6 | Lithium storage performance of carbon nanotubes with different nitrogen contents as anodes in lithium ions batteries显示文摘 | REN Wei LI Dejun LIU Hao | 2013 | Electrochimica Acta2013，105，： | 1 |
| 7 | Global stability of multi-group SEIRS epidemic models with vaccination显示文摘 | Dejun Fan Pengmiao Hao Dongyan Sun Junjie Wei | 2018 | International Journal of Biomathematics2018，11，1： | 0 |
| 8 | Biological traits and life history of Pagiophloeus tsushimanus(Coleoptera:Curculionidae),a weevil pest on camphor trees in China显示文摘Cinnamomum camphora(L.)J.Presl.(Laurales:Lauraceae)is widely cultivated as an important landscape tree species in many urban areas in South China,especially in Shanghai City.Pagiophloeus tsushimanus Morimoto has become a destructive insect pest of C.camphora plantations in Shanghai,but the biological and ecological traits of this pest remain largely unknown.In this study,we investigated the damage and life history and determined the larval instar of P.tsushimanus.The results indicated that P.tsushimanus is a monophagous weevil pest,and C.camphora is the unique host tree species.C.camphora plantations in all administrative districts of Shanghai have been seriously damaged by P.tsushimanus.Adults often aggregate for feeding on the tender bark of twigs and occasionally on newly emerged buds.After experiencing damage,the twigs shrink and crack and the buds will shrink.Adults tend to repeatedly mate and oviposit,and all females lay single eggs at a time.Eggs will be covered with a mixture of secretions and wood chips by female adults.Larvae(1 st-2 nd instar)feed on the phloem,while 3 rd-5 th instar can bore into the phloem and the cambium.Massive tunnels,including three shapes(inverted'L',inverted'T',and inverted'Z'),were observed in the trunk of each tree,and resulted in swelling of the outer bark.P.tsushimanus has one life cycle per year in Shanghai.Both adults and larvae(3 rd-5 th instar)overwinter from early November to early April.Adults overwinter in grooves on the underside of branches or at branch nodes,and larvae overwinter in tunnels.Five larval instars of P.tsushimanus were determined according to Dyar’s and Crosby’s rules.The biological traits and life history of P.tsushimanus have been identified and can provide guidance in terms of pest control and plantation management. | Cong Chen Congcong Zhang Shouyin Li Han Zhu Binqi Fan Yan Wang Peng Su Yangyang Han Dejun Hao | 2021 | Journal of Forestry Research2021，32，5： | 0 |
| 9 | The eff ects of temperature and host size on the development of Brachymeria lasus parasitising Hyphantria cunea显示文摘Brachymeria lasus Walker is a solitary endoparasitoid that attacks the pupae of a wide range of lepidopteran hosts,including an important invasive species,the fall webworm(Hyphantria cunea Drury).We studied the relationship between temperature and development of B.lasus from egg to adult hatching.The results show a decrease in parasitoid development time from 34.4 days at 18°C to 10.6 days at 32°C.The minimum threshold temperature of B.lasus was 13.2°C±1.7°C,and the eff ective accumulated temperature was 210.3±28.7 degree days.These results provide a basis for optimizing the production of this parasitoid.In addition,the eff ects of host size on off spring performance of B.lasus were investigated under laboratory conditions.Off spring longevity,size,and percentage of females were positively correlated with host size.Female off spring are larger and live longer than males.Furthermore,this research showed that parasitoid adults successfully emerged from approximately 27.9%of pupae.However,eclosion or hatching of H.cunea decreased dramatically,which may be due to damage caused by female B.lasus when testing hosts with their ovipositors or by feeding on them.The results suggest that B.lasus has the potential to become an effi cient natural enemy for controlling H.cunea. | Shuo Tian Tianzi Gu Cong Chen Xudong Zhao Pengcheng Liu Dejun Hao | 2021 | Journal of Forestry Research2021，32，1： | 0 |
| 10 | Modeling and Simulation of a Hybrid Jet-Impingement/Micro-Channel Heat Sink显示文摘With the progressive increase in the number of transistors that can be accommodated on a single integrated circuit,new strategies are needed to extract heat from these devices in an efficient way.In this regard methods based on the combination of the so-called“jet impingement”and“micro-channel”approaches seem extremely promising for possible improvement and future applications in electronics as well as the aerospace and biomedical fields.In this paper,a hybrid heat sink based on these two technologies is analysed in the frame of an integrated model.Dedicated CFD simulation of the coupled flow/temperature fields and orthogonal tests are performed in order to optimize the overall design.The influence of different sets of structural parameters on the cooling performance is examined.It is shown that an optimal scheme exists for which favourable performance can be obtained in terms of hot spot temperature decrease and thermal uniformity improvement. | Taidong Xu Hao Liu Dejun Zhang Yadong Li Xiaoming Zhou | 2021 | Fluid Dynamics & Materials Processing2021，17，1： | 0 |
| 11 | LOADING SEQUENCE AND ARRANGEMENT EFFECTS FOR TWO-DIMENSIONAL DISTRIBUTIONAL SPECTRUM显示文摘LOADINGSEQUENCEANDARRANGEMENTEFFECTSFORTWO-DIMENSIONALDISTRIBUTIONALSPECTRUMPingAn;WangDejun;XuHao(MechanicalEngineeringinsti... | Ping An Wang Dejun Xu Hao(Mechanical Engineering institute,Northeastern University, Shenyang, China, 110006) | 1994 | Chinese Journal of Aeronautics1994，7，2： | 0 |
| 12 | HEAT ENERGY DISSIPATION IN FATIGUE DAMAGE PROCESS显示文摘Using the dissipated energy as an essential parameter,the energy dissipative structure in pro-cess of fatigue damage of materials has been established.Through thermodynamic analysis forirreversible energy dissipation in fatigue damage process,the heat dissipative variations incyclic loading process as well as in a cycle have been systematically studied on the basis of lowcycle fatigue tests and infrared measurement of self-heating thermography.Meanwhile,thecyclic hysteresis energy and efficient energy dissipation (stored energy) have been proposedduring fatigue damage process. | TUNG Xiaoyan Northwestern Polytechnical University,Xi’an,ChinaWANG Dejun XU Hao Northeast University of Technology,Shenyang,China | 1992 | Acta Metallurgica Sinica(English Letters)1992，5，5： | 0 |
| 13 | Topography modulates effects of nitrogen deposition on microbial resource limitation in a nitrogen-saturated subtropical forest显示文摘Background:Nitrogen(N)saturation theory proposes that an ecosystem might switch from N limitation to carbon(C),phosphorus(P),or other nutrient limitations if it receives continuous N input.Yet,after N limitation is removed,which nutrient is the most limited and whether topography modulates such change is rarely tested at a microbial level.Here,we conducted a two-year N addition experiment under two different topography positions(i.e.a slope and a valley)in a N-saturated subtropical forest.Soil enzyme activity was measured,and ecoenzymatic stoichiometry indexes were calculated as indicators of microbial resource limitation.Results:In the valley,two-year N addition changed the activity of all studied enzymes to various degrees.As a result,microbial C limitation was aggravated in the valley,and consequently microbial decomposition of soil labile organic C increased,but microbial P limitation was alleviated due to the stoichiometry balance.On the slope,however,N addition did not significantly change the activity of the studied enzymes,and did not alter the status of microbial resource limitation.Conclusions:These results indicate that C is a more limited element for microbial growth than P after removing N limitation,but we also highlight that topography can regulate the effect of N deposition on soil microbial resource limitation in subtropical forests.These findings provide useful supplements to the N saturation theory. | Hao Chen Junjie Tang Xibin Sun Kayan Ma Huaihai Chen Dejun Li | 2021 | Forest Ecosystems2021，8，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员