检索结果-南通市图书馆

Genetic behavior of triticum aestivum–Dasypyrum villosum translocation chromosomes t6V#4S·6DL and t6V#2S·6AL carrying powdery mildew resistance

引用

Journal of Integrative Agriculture 2017年第10期16卷 2136-2144页

作者： LIU Chang ye Xing-guo WANG Mei-jiao LI Shi-jin LIN Zhi-shan National Key Facility of Crop Gene Resources and Genetic Improvement Institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China

t6V#2S·6AL and t6V#4S·6DL translocation chromosomes developed from the cross of wheat and different Dasypyrum villosum accessions have good powdery mildew （PM） resistance, but their pairing and pyramiding behavior remains unclear. Results in this study indicated that the pairing frequency rate of the two differently originated 6VS chromosomes in their F1 hybrid was 18.9% according to genomic in situ hybridization （GISh）; the PM resistance plants in the F2 generation from the cross between t6V#4S·6DL translocation line Pm97033 and its PM susceptible wheat variety Wan7107 was fewer than expected. however, the ratio of the resistant vs. the susceptible plants of 15：1 in the F2 generation derived from the cross between the two translocation lines of t6V#2S·6AL and t6V#4S·6DL fitted well. Plants segregation ratio （homozygous：heterozygous：lacking） revealed by molecular marker for t6V#4S·6DL or t6V#2S·6AL in their F2 populations fitted the expected values of 1：2：1 well, inferring that the pairing of the two alien chromosome arms facilitates the transmission of t6V#4S·6DL from the F1 to the F2 generation. A quadrivalent was also observed in 21% of pollen mother cells （PMCs） of homozygote plants containing the two pairs of translocated chromosomes. the chromosome pairing between 6V#2S and 6V#4S indicates that it will be possible to obtain recombinants and clarify if the PM resistance determinant on one alien chromosome arm is different from that on the other.

关键词： trificum aestivum Dasypyrum villosum translocation genetic behavior powdery mildew resistance GISh molecular marker

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mechanical and thermal postbuckling of FGM thick circular cylindrical shells reinforced by FGM stiffener system using higher-order shear deformation theory

引用

Applied Mathematics and Mechanics(English Edition) 2017年第1期38卷 73-98页

作者： D.V.DUNG h.t.thIEM Faculty of Mathematics Mechanics and InformaticsVietnam National UniversityHanoi 100000Vietnam

the postbuckling of the eccentrically stiffened circular cylindrical shells made of functionally graded materials （FGMs）, subjected to the axial compressive load and external uniform pressure and filled inside by the elastic foundations in the thermal environments, is investigated with an analytical method. the shells are reinforced by FGM stringers and rings. the thermal elements of the shells and stiffeners in the fundamental equations are considered. the equilibrium and nonlinear stability equations in terms of the displacement components for the stiffened shells are derived with the third-order shear deformation theory and Leckhniskii smeared stiffener technique. the closed-form expressions for determining the buckling load and postbuckling load-deflection curves are obtained with the Galerkin method. the effects of the stiffeners, the foundations, the material and dimensional parameters, and the pre-existent axial compressive and thermal load are considered.

关键词： stiffened cylindrical shell functionally graded material (FGM) postbuck- ling elastic foundation analytical

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

the development and functions of CD41 t cells expressing a transgenic tCR specific for an MhC-I-restricted tumor antigenic epitope

引用

Cellular & Molecular Immunology 2011年第4期8卷 333-340页

作者： Xue han Peiying ye Liqun Luo Linghua Zheng Yang Liu Lieping Chen Shengdian Wang Key Laboratory of Infection and Immunity Institute of BiophysicsChinese Academy of SciencesBeijingChina Graduate School Chinese Academy of SciencesBeijingChina Department of Immunobiology Yale University School of MedicineNew HavenCTUSA Division of Immunotherapy University of MichiganAnn ArborMIUSA

It.has been reported that the ratio of CD41 to CD81 t cells has no bias in a few class I major histocompatibility complex(MhC-I)-restricted t-cell receptor(tCR)-transgenic mice specific for alloantigens or autoantigens,in which most CD41 t cells express an MhC-I-restricted *** this study,we further showed that more than 50%of CD41 t cells in MhC-I-restricted P1A tumor antigen-specific tCR(P1AtCR)-transgenic mice could specifically bind to MhC-I/P1A peptide complex.P1A peptide could stimulate the transgenic CD41 t cells to proliferate and secrete both type 1 helper t cell and type 2 helper t cell *** activated CD41 t cells also showed cytotoxicity against P1A-expressing tumor *** analysis of tCR a-chains showed that these CD41 t cells were selected by co-expressing endogenous *** results show that CD41 t cells from P1AtCR transgenic mice co-expressed an MhC-I-restricted transgenic tCR and another rearranged endogenous tCRs,both of which were functional.

关键词： CD41^(+)cells MhC-I restriction P1A tumor antigen tCR-transgenic mice

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

theoretical Study on the triplet-sensitized Photolysis of 2,5-Dimethylfuran

引用

Chinese Journal of Structural Chemistry 2005年第10期24卷 1145-1151页

作者： WANG Yan-Xia ye Song Department of Chemistry Yunnan University Kunming 650091 China

In the present work, the triplet-sensitized photolysis of 2,5-dimethylfuran has been investigated with the complete active space SCF （CASSCF） molecular orbital method. two different reaction routes through diradical and carbene intermediates respectively have been systematically studied, and the reaction via carbene intermediate is the major part well compatible with experiment. Geometries of minima and transition states on S0t1 surface were fully optimized at the CAS level with a 6-31G^＊ basis set. A multireference MP2 algorithm that.has been implemented in Gaussian was used to correct the energetics for dynamic correlation. Four intersystem crossing points have been located and discussed, and two of them are efficient. Our computation indicates that the reaction must occur on the triplet-excited state.

关键词： CASSCF photolysis intersystem crossing point reaction path

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Critical review of superplastic magnesium alloys with emphasis on tensile elongation behavior and deformation mechanisms

引用

Journal of Magnesium and Alloys 2022年第5期10卷 1133-1153页

作者： h.t.Jeong W.J.Kim Department of Materials Science and Engineering Hongik UniversitySangsu-dong 72-1 Mapo-guSeoul 121-791South Korea

the tensile elongation behavior and deformation mechanisms of superplastic Mg alloys and Mg composites were examined by extensively reviewing the literature published from the time of the first report on the superplasticity of Mg alloys to the present *** on the superplasticity of Mg alloys have been conducted mainly on Mg-Al-Zn(AZ)series alloys,Mg-Zn-Zr(ZK),Mg-Li and Mg-RE(rare earth)alloys,and in recent years,Mg-RE alloys have attracted the greatest *** effect of grain size and the type and amount of secondary phase particles on the superplasticity of Mg alloys was systematically examined and *** alloys processed by severe plastic deformation(SPD)and powder-metallurgy methods have smaller grain sizes and exhibit superior superplasticity compared to conventionally processed(by extrusion and rolling)Mg *** the AZ alloys,as the volume fraction of the Mg17Al12phase increases,smaller grains are obtained,and the low-temperature superplasticity(LtS)and high-strain-rate superplasticity(hSRS)characteristics become *** ZK60 alloy with finely dispersed Mg Zn2particles exhibits excellent LtS,while the Mg-RE alloys with a high fraction of thermally stable particles exhibit excellent ***-Li alloys can exhibit LtS even at room temperature due to the presence of a high-volume fraction of the body centered cubic(BCC)phase where atomic diffusivity is *** boundary diffusion-and lattice diffusion-controlled grain boundary sliding are found to operate as the dominant deformation mechanisms below~473 K and above~673 K,respectively,at small grain *** mechanism maps were constructed based on the analysis of the deformation behavior of superplastic Mg alloys,and from the maps,the critical conditions for achieving LtS,hSRS and simultaneous achievement of LtS and hRSR were calculated and proposed,and their importance was discussed.

关键词： Magnesium alloys Superplastic Grain size Secondary phase Grain boundary sliding

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

high-precision magnetic field measurement system based on a coherent population trapping magnetometer onboard the SAtech-01 satellite

引用

Science China technological Sciences 2025年

作者： hongbo XUE Wei SONG haoran ZhAO Yiteng ZhANG Shanzhi ye Jindong WANG Ran tAO Peng SANG Keli ChEN Xingzi BI Bingjun ChENG Bin ZhOU Yongliang XUE Yingying tANG Liu LIU Jinsong LI Xiaocheng ZhU Baoquan LI Jinguo LIU Wen ChEN Xiaofeng ZhANG Yonghe ZhANG Lei LI State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Electronics and Information technology for Space Systems National Space Science Center Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Innovation Academy for Microsatellites Chinese Academy of Sciences

On July 27, 2022, a high-precision system for measuring the magnetic field based on a coherent population trapping magnetometer（referred to as the CPt system） was launched onboard the Space Advanced technology demonstration satellite（SAtech-01） by a ZK-1A rocket. the payload comprises a scalar coherent population trapping magnetometer（CPtM）, triaxial anisotropic magnetoresistance magnetometer（AMRM）, and nano star tracker mounted on a non-magnetic telescopic tubular mast. this configuration enables synchronized measurement of scalar and vector geomagnetic fields, as well as the attitude,making the payload with its compact sensors suitable for applications on miniature satellite platforms. On November 7, 2022,the novel telescopic tubular mast was deployed in orbit, extending to a length of 5.28 m. the CPtM, an absolute scalar magnetometer with an omnidirectional sensor, is the first China-developed quantum/atomic magnetometer successfully operating in space. In orbit, the CPtM has sensitivity of ～10 pt.hz1/2and can automatically operate under complex magnetic field variations. the difference between the scalar fields obtained using the CPtM and ChAOS model has a mean deviation of–3.73 n t and a standard deviation of 26.11 nt（1σ）, without on-orbit calibration or correction. the miniaturized AMRM has a sensitivity of ～0.3 n t.hz1/2and maintains stable and reliable operation in orbit. the low-power and miniaturized nano star tracker has a measurement uncertainty of 14.23″（1σ） in orbit. the mission has realized the on-orbit technical verification of the integrated and synchronized detection of the vector magnetic field and attitude and fully validated the system's performance,automation level, and reliability.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

the hot compressive deformation behavior of cast Mg-Gd-Y-Zn-Zr alloys with and without LPSO phase in their initial microstructures

引用

Journal of Magnesium and Alloys 2022年第10期10卷 2901-2917页

作者： h.t.Jeong W.J.Kim Departmentof Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

Samples of Mg-8.2Gd-3.8Y-1.1Zn-0.4Zr alloy with and without an intragranular lamellae-shaped long period stacking ordered(LPSO)phase were prepared through heat treatment and a series of hot compression tests on these materials were conducted to examine and evaluate the influence of LPSO on the hot compressive deformation behavior and deformation mechanisms at a given alloy *** values of activation energy for plastic flow(Qc)of the solution treated(without LPSO phase)and annealed alloys(with intragranular LPSO phase)were larger than that for pure Mg,indicating that the presence of a high amount of rare earth(RE)elements and LPSO in the Mg matrix significantly increases *** Qcvalue of the annealed alloy was larger than that of the solution treated alloy at all the strain levels(223.3 vs.195.5 k J/mol in average)and the largest difference in Qcbetween the two alloys was recorded at the smallest strain of 0.1 where precipitation of LPSO during deformation was limited in the solution treated *** observations imply that the formation of LPSO phase out of the RE-rich solid solution matrix during deformation increases Qc,but the increment is not so *** of the hot compressive data of the alloys with LPSO phase and the alloys with RE-rich solid solution matrix in literatures indicates the similarity of the effect of the LPSO and RE-rich solid solution matrix phases on Qcand high-temperature strength.

关键词： Magnesium alloys LPSO Deformation mechanism Dynamic recrystallization Activation energy for plastic flow Processing maps

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Design of infrared camouflage cloak for underground silos

引用

Defence technology（防务技术） 2020年第1期16卷 43-49页

作者： Luo Zhang Qiang Zhang hong ye Department of thermal Science and Energy Engineering University of Science and Technology of ChinaHefei 230027PR China

the temperature difference between the exposed surface of an underground silo and the surrounding soil surface is significant,which means a silo can be easily found by infrared *** designed an infrared camouflage cloak consisting of an imitative layer and an insulation layer for the *** imitative layer is used to imitate the thermal response of the soil to the surrounding *** insulation layer is used to weaken the impact of the internal temperature field of the silo on the lower boundary of the imitative layer.A silo model including surrounding soil and a soil model without silo were established,and the influences of the material and thickness of each layer on the infrared camouflage effect were *** results show that when using a silicone rubber containing alumina powder with a volume fraction of 3.18% as the imitative material,its thermal inertia is in consistent with that of the ***,it was found that the thickness of the imitative layer doesn't need to be greater than its thermal penetration depth to achieve the infrared camouflage,and the absence of the insulation layer will cause hot spots on the silo surface in winter to weaken the camouflage *** optimized thicknesses of the imitative layer and the insulation layer are 22 cm and 4 cm re *** simulations indicate that with the application of the cloak,the maximum value of the absolute values of the temperature differences between the average temperatures of the silo surface and the surrounding soil surface temperatures drops from 1,59℃ to 0.31℃ in summer and from 1.92℃ to 0.21℃ in *** designed cloak can achieve an all-weather and full-time passive infrared camouflage.

关键词： Underground silo Infrared camouflage cloak Imitative layer Insulation layer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Fuzzy Lyapunov Function Approach to Stabilization of Interval type-2 t-S Fuzzy Systems

A Fuzzy Lyapunov Function Approach to Stabilization of Inter...

引用

第25届中国控制与决策会议

作者： tao Zhao Jian Xiao ye Li YiXing Li the School of transportation and Logistics Southwest Jiaotong University the School of Electrical Engineering Southwest Jiaotong University

ISBN: (纸本)9781467355339

this paper focuses on deriving the stability condi- tions of interval type-2 fuzzy-model-based （FMB） control system formed by the interval type-2 t-S fuzzy model and the interval type-2 t-S fuzzy controller connected in a closed loop. to reduce the conservativeness of stability analysis, a fuzzy Lyapunov function, considering the property of membership functions, is adopted. the stability conditions in terms of linear matrix inequalities （LMIs） are obtained. A numerical example shows the effectiveness of the proposed conditions.

关键词： interval type-2 t-S fuzzy systems linear matrix inequalities fuzzy Lyapunov function stability analysis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Microstructure of Nitrided Aluminum Alloys Using an Electron-Beam-Excited-Plasma (EBEP)

引用

材料热处理学报 2004年第5期25卷 349-353页

作者： L.Liu A.Yamamoto t.hishida h.Shoyama t.hara h.tsubakino GraduateSchool UniversityofHyogo2167ShoshaHimeji671-2201Japan FaultyofEngineering ToyotaTechnologicalInstituteNagoya468-8511Japan

Nitriding of surface of aluminum alloys was carried out with using an electron-beam-excited-plasma (EBEP) technique. the EBEP is sustained by electron impact ionization with energetic electron beam. two kinds of substrates, aluminum alloys AA5052 and AA5083, were exposed to the down flow of EBEP source at 843 K for 45min. the specimens were characterized with respect to following properties: crystallographic structure (XRD), morphology (SEM) and the cross sectional microstructures of the nitrided layer was observed using a scanning electron microscopy (SEM). there are some A12O3 particles on the surface of the nitrided AA5052 and AA5083. the A1N layers were formed on the substrates with the thickness of 4.5 fi m for AA5052 and 0.5 /z m for AA5083 . A relatively uniform nitrided surface layer composed of A1N can be observed on the AA5052 substrate. the grains size near the interfaces between the substrate and A1N layer were smaller than that near the surface. On the surface of A1N layer, the concentration of nitrogen was high and in the middle of A1N layer it.had a constant concentration like the aluminum and the concentration was decreased with approaching to the interface. On the surface of nitrided AA5083, a uniform A1N layer was not formed as the reason for the high nitriding temperature.

关键词：显微结构铝合金渗氮 EBEP

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：