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substructure     
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  子结构
     Substructure pseudo-dynamic testing based on NEESgrid:Mini-MOST experiment
     基于NEESgrid网络的子结构拟动力实验:Mini-MOST实验
短句来源
     In this paper,we discuss the whole structure of T_n:X→[X~n]_n,X∈N(n= 2,3,……) and the structure of attractor and substructure.
     本文讨论了 T_n:X(?) [x2]_n,x∈N(n=2,3,……)的全局结构,吸引子和子结构的构造。
短句来源
     2. According to the up-to-minute development of meta-cognitive theory, mathematical meta-cognitive structure should be the substructure of mathematical cognitive structure .
     2.根据元认知理论的一些最新发展,本文认为,数学元认知结构应该作为数学认知结构的子结构,对数学认知结构的认识不应只局限于学生头脑中的数学知识结构和数学认识结构。
短句来源
     NETWORK PARALLEL SUBSTRUCTURE CONJUGATE GRADIENT METHOD BASED ON PVM
     基于PVM的网络并行子结构共轭梯度法
短句来源
     Application of substructure method in software-ANSYS
     子结构方法在ANSYS软件中的应用
短句来源
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  亚结构
     The unit cell parameters of Ce substructure are a = 7.08 A, cce= 3.51-3.60 A, and the possible space groups are /4,/4,/4mm, /4/m, /4/mmm.
     Ce亚结构晶胞参数为a=7.08A,c_(Co)=3.51—3.60A,可能空间群为I4,I4,I4mm,I4/m,I4/mmm;
短句来源
     Investigation on the Substructure of the Nanocrystallization from Amorphous Fe 78 B 13 Si 9 Alloy
     Fe_(78)B_(13)Si_9非晶合金纳米晶化的亚结构
短句来源
     TEXTURE AND FINE SUBSTRUCTURE IN 18%Ni MARAGING STEEL (240MPa GRADE)
     18%Ni马氏体时效钢(240MPa级)的织构与亚结构
短句来源
     The Reliability Analysis and Thermal Fatigue Dislocation Substructure Evolution of 62Sn-36Pb-2Ag Solder Joints
     62Sn-36Pb-2Ag焊点的可靠性及热疲劳位错亚结构的演化分析
短句来源
     The substructure of C15 TiCr 2 consists of microtwins, which are caused by shearing deformation in C14→C15 transformation.
     C15TiCr2的亚结构由细微的孪晶组成,这些孪晶是在C14→C15相变过程中由于产生了切变而形成的。
短句来源
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  下部结构
     Design of Substructure of Lhasa River Bridge on Qinghai-Tibet Railway
     青藏铁路拉萨河特大桥下部结构设计
短句来源
     Through the analysis and research on design and construction of cross-sea bridge substructure, the conclusion and proposal are given to the key points of design and construction.
     通过对跨海大桥下部结构设计与施工技术的分析和研究,归纳总结跨海大桥下部结构的设计与施工原则,在此基础上对下部结构的设计和施工进行总结和评价,并对其提出建议。
短句来源
     Research of Design and Construction of Substructure of the Cross Sea Bridge
     跨海大桥下部结构设计与施工技术研究
短句来源
     THE SUBSTRUCTURE CONSTRUCTION TECHNIQUESOF THE SHANTOU BAY SUSPENSION BRIDGE
     汕头海湾大桥悬索桥下部结构施工技术
短句来源
     Approach to Level Deformation Calculation and Control of Substructure of Elevated Bridge of Rail Traffic
     轨道交通高架桥下部结构水平变形计算及控制探讨
短句来源
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  底座
     Fuzzy optimum design of substructure of Model DZ450/9-S drilling rig.
     DZ450/9—S钻机底座结构模糊优化设计
短句来源
     Static and Dynamic Characteristic Study of Model ZJ40/2250DB-Drilling Rig Derrick and Substructure
     ZJ40/2250DB型钻机井架及底座静动态特性研究
短句来源
     Vibration testing and analysis of ZJ15 rig substructure.
     ZJ15钻机底座的振动测试分析
短句来源
     Modal testing and analysis of Model ZJ15 rig substructure.
     ZJ15型钻机底座的模态测试分析
短句来源
     Design of a vibration test model for the ZJ15 rig substructure
     ZJ15型钻机底座振动试验模型设计
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  substructure
It is found that there were high-density dislocations and stacking fault substructure in the Cu clusters that forms the obstacle of the dislocation motion, which should be the dominant reason of strengthening in the Fe-Cu alloy.
      
An analysis of these characteristics makes it possible to conclude that the total porosity in opals comprises macropores, which are in essence the voids between structure-forming spheres, and nanopores connected to the substructure of the spheres.
      
Prediction of Physical Properties of Organic Compounds Using Artificial Neural Networks within the Substructure Approach
      
It is demonstrated that porous glasses have a through mesoporous substructure with mean pore diameters ranging from 4 to 15 nm and a polymodal microporous substructure with pore sizes ranging from 0.35 to 2 nm.
      
This microporous substructure is formed by ultramicropores of molecular sizes and also medium- and large-sized micropores.
      
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Twin formation associated with grain boundary migration in recrystallized armcoiron has been studied by the method of vacuum etching.No noticable substructureswere observed after recrystallization at 750℃ for 5 hours.However,after reheatingfor a short time at 770℃,fine substructures appeared in most of the ferrite grains.During prolonged heating the substructure-free grains gradually grew at the expense ofthose possessing substructures.When the reheating temperature is raised close to theA_3 temperature,grain...

Twin formation associated with grain boundary migration in recrystallized armcoiron has been studied by the method of vacuum etching.No noticable substructureswere observed after recrystallization at 750℃ for 5 hours.However,after reheatingfor a short time at 770℃,fine substructures appeared in most of the ferrite grains.During prolonged heating the substructure-free grains gradually grew at the expense ofthose possessing substructures.When the reheating temperature is raised close to theA_3 temperature,grain boundary migration is markedly accelerated.Two types of twins were observed during grain growth.One of them,probablyidentical in nature with ordinary annealing twins,has its non-coherent twin boundaryalways attached to the old grain boundary.Depending on the manner of migrationof the grain boundary and the non-coherent twin boundary,such type of twins maygrow,retreat,or even disappear.The other type of twins has a characteristic wedge-shaped twin boundary which is quite stable,and little change has been observed afterprolonged heating.

应用真空热侵蚀方法,研究Armco铁晶粒长大晶界迁移过程中,退火孪晶形成的过程。观察到在低于A_3点退火后,在了770℃短时间保温,多数α-铁素体晶粒内出现细小亚结构。随着加热时间的延长,具有细小亚结构的晶粒逐渐消失,原先不含亚结构的晶粒,则逐渐长大。将加热温度提高至A_3点附近,显著加速晶界迁移的过程。在长大的晶粒中,出现两类退火孪晶。一类的性质与一般退火孪晶相似,似其非共格孪晶界经常出现于旧晶界附近。视晶粒间界与非共格孪晶界迁移的情况,这类退火孪晶在保温过程中,可能随晶界迁移而伸长,亦可能随非共格孪晶界迁移而变细或消失。另一类孪晶的特点是一端在晶粒间界上,另一端呈楔状。楔状孪晶界很稳定,在保温过程中,未发现任何变化,在晶粒间界上的一端,则与晶粒间界一起,发生迁移。根据观察结果,认为α-铁中退火孪晶形成的机构与Burke及Furnbull所提出的面心立方金属中退火孪晶形成的机构相似,退火孪晶的形成与晶粒间界迁移有密切关系。

By hot rolling at temperatures between 1175°~900℃ and subsequently isothermaltreating at 600℃, the grain size of α-Fe was refined to 7-22μ in diameter. There werea number of 3-and 2-dimensional dislocation networks and precipitates of small NbCparticles in α-Fe. The lower yield stress of the alloy can be increased up to 35--42kg/mm~2 by the combined strengthening of grain refinement, second phase particle (NbC)and dislocation substructure. The lower yield stress σ_(ly) is related to the average valueof...

By hot rolling at temperatures between 1175°~900℃ and subsequently isothermaltreating at 600℃, the grain size of α-Fe was refined to 7-22μ in diameter. There werea number of 3-and 2-dimensional dislocation networks and precipitates of small NbCparticles in α-Fe. The lower yield stress of the alloy can be increased up to 35--42kg/mm~2 by the combined strengthening of grain refinement, second phase particle (NbC)and dislocation substructure. The lower yield stress σ_(ly) is related to the average valueof the grain diameter by Hall-Petch equation:σ_(ly)=σ_i+k_yd~(1/2)where k_y is proportional constaut of strengthening by grain refinement, k_y=2. 2kg/mm~2;σ_i is friction stress on moving dislocations in grains. The values of σ_i for the specimensisothermal treated for 30 sec, 40 min and 3hr at 600℃ are 21. 5, 13. 5 and 13. 5kg/mm~2,respectively. The dislocation density in the alloy is increased with increasing deformation. Therelationship between the square root of average dislocation densi nd the flow stresscan be expressed in the form of the following equation: σ_f=σ_o+αGbρ~(1/2)where G is the shear modulus; b is the magnitude of the Burgers vector; αis thestrengthening proportional constant by the interction of dislocations, α=0. 37; σ_o is theflow stress due to all cases (e. g. grain refinement and dispersion strengthening etc.) otherthan dislocation interaction. With the specimens isothermal treated at 600℃ for 30 sec,40 min and 3hr, the values of σ_o are found to be 34, 30 and 30 kg/mm~2, respectively.Results from the analysis of experimental data and theoretical calculations have shownthat the value of σ_i is the summation of the contribution to yield stress by the disper-sion strengthening of second phase particle (NbC) σ_p, dislocation substructure strengthening σ_d and lattice friction stress σ_l, i. e.: σ_i=σ_p +σ_d+σ_l The ‘precipitate growth' dislocation loops have been observed around the NbCparticles precipitated in α-Fe. The mechanisms for ‘precipitate growth' slocations havebeen discussed in this paper, but their effect on the strengthening has not yet beenelarified and will be further investigated.

Fe—0.04Nb—0.02C合金经1175°C—900°C轧制并随即在600°C进行等温处理后,获得直经为7-22微米的等轴细晶粒α—Fe。在α—Fe中保留相当数量的三维和二维位错网络,并沉淀折出细小的NbC粒子。通过细化晶粒强化,NbC第二相粒子弥散强化和位错亚结构强化的叠加,合金下屈服强度可提高达35-42公斤/毫米~2。下屈服强度σ_(iy)与晶粒的平均直径d之间的关系符合Hall—Petch公式: σ_(iy)=σ_i+k_yd~(-1/2)其中k_y为细化晶粒强化的比例常数,k_y=2.2公斤/毫米~3/2;σ_i为位错在晶粒内运动的阻力,对于600°C等温30秒,40分及3小时者,σ_i分别为21.5,13.5及13.5公斤/毫米。合金的位错密度随拉伸形变程度的增高而增加,平均位错密度ρ的平方根值与对应的流变应力值关系可表达如下式σ_f=σ_?+αGbρ~(1/2)其中G是切变模量;b是柏纸矢量的模;α是位错交互作用产生强化的比例常数,α=0.37;σ。是除位错交互作用外其它因素(如晶粒细化,弥散强化等)对流变应力的贡献,对于600℃等温30秒,40分及3小时者,α_o分别为34,30及30公斤...

Fe—0.04Nb—0.02C合金经1175°C—900°C轧制并随即在600°C进行等温处理后,获得直经为7-22微米的等轴细晶粒α—Fe。在α—Fe中保留相当数量的三维和二维位错网络,并沉淀折出细小的NbC粒子。通过细化晶粒强化,NbC第二相粒子弥散强化和位错亚结构强化的叠加,合金下屈服强度可提高达35-42公斤/毫米~2。下屈服强度σ_(iy)与晶粒的平均直径d之间的关系符合Hall—Petch公式: σ_(iy)=σ_i+k_yd~(-1/2)其中k_y为细化晶粒强化的比例常数,k_y=2.2公斤/毫米~3/2;σ_i为位错在晶粒内运动的阻力,对于600°C等温30秒,40分及3小时者,σ_i分别为21.5,13.5及13.5公斤/毫米。合金的位错密度随拉伸形变程度的增高而增加,平均位错密度ρ的平方根值与对应的流变应力值关系可表达如下式σ_f=σ_?+αGbρ~(1/2)其中G是切变模量;b是柏纸矢量的模;α是位错交互作用产生强化的比例常数,α=0.37;σ。是除位错交互作用外其它因素(如晶粒细化,弥散强化等)对流变应力的贡献,对于600℃等温30秒,40分及3小时者,α_o分别为34,30及30公斤/毫米~2。实验数据分析和理论计算结果表明,σ_i值是NbC第二相粒子弥散强化,位错亚结构强化和点阵阻力对屈服强度贡献α_p,σ_d和σ_l的叠加,即σ_i=σ_p+σ_d+σ_l 在α—Fe中沉淀折出的NbC粒子周围观察到“沉淀生长”位错圈,对其形成机理进行了分析,而它们的强化作用尚须进一步探明。

By hot roiling at temperatures between 1175—900℃ and subsequently isothermal treating at 600℃, the grain size of α-Fe was refined to 7—22μm in diameter. There were a number of 3-and 2-dimensional dislocation networks and precipitates of small NbC particles in α-Fe. The lower yield stress of the alloy can be increased up to 35—42 kg/mm~2 by the combined strenthening of grain refinement, second phase particle (NbC) and dislocation substructure. The lower yield stress σ_(1y) is related to the average value...

By hot roiling at temperatures between 1175—900℃ and subsequently isothermal treating at 600℃, the grain size of α-Fe was refined to 7—22μm in diameter. There were a number of 3-and 2-dimensional dislocation networks and precipitates of small NbC particles in α-Fe. The lower yield stress of the alloy can be increased up to 35—42 kg/mm~2 by the combined strenthening of grain refinement, second phase particle (NbC) and dislocation substructure. The lower yield stress σ_(1y) is related to the average value of the grain diameter by Hall-Perch equation:

Fe-0.04Nb-0.02C合金经1175—900℃轧制并随即在600℃等温处理后,获得直径为7—22微米等轴细晶粒的α-Fe。在α-Fe中保留相当数量的三维和二维位错网络,并沉淀析出细小的NbC粒子。通过细化晶粒,NbC第二相粒子和位错亚结构的综合强化,合金下屈服强度可提高到35—38公斤/毫米~2。下屈服强度σ_(1y)与晶粒的平均直径d之间的关系符合Hall-Petch公式: σ_(1y)=σ_i+k_yd~(-(1/2)) 其中k_y=2.2公斤/毫米~(3/2);对于600℃等温30秒,40分及3小时者,σ_i分别为21.5,13.5及13.5公斤/毫米~2。理论计算结果表明,σ_i值是NbC第二相粒子弥散强化,位错亚结构强化和点阵阻力对屈服强度贡献σ_p,σ_d和σ_1的叠加,即σ_i=σ_p+σ_d+σ_1 合金的位错密度随拉伸变形程度的增高而增加。平均位错密度ρ与对应的流变应力值σ_f的关系可表达成下式σ_f=σ_0+αGbρ~(1/2) 其中α=0.37;σ_0是除位错交互作用外其他因素对流变应力的贡献,对于600℃等温30秒,40分和3小时者,σ_0分别为34,30及30公斤/毫米~2。...

Fe-0.04Nb-0.02C合金经1175—900℃轧制并随即在600℃等温处理后,获得直径为7—22微米等轴细晶粒的α-Fe。在α-Fe中保留相当数量的三维和二维位错网络,并沉淀析出细小的NbC粒子。通过细化晶粒,NbC第二相粒子和位错亚结构的综合强化,合金下屈服强度可提高到35—38公斤/毫米~2。下屈服强度σ_(1y)与晶粒的平均直径d之间的关系符合Hall-Petch公式: σ_(1y)=σ_i+k_yd~(-(1/2)) 其中k_y=2.2公斤/毫米~(3/2);对于600℃等温30秒,40分及3小时者,σ_i分别为21.5,13.5及13.5公斤/毫米~2。理论计算结果表明,σ_i值是NbC第二相粒子弥散强化,位错亚结构强化和点阵阻力对屈服强度贡献σ_p,σ_d和σ_1的叠加,即σ_i=σ_p+σ_d+σ_1 合金的位错密度随拉伸变形程度的增高而增加。平均位错密度ρ与对应的流变应力值σ_f的关系可表达成下式σ_f=σ_0+αGbρ~(1/2) 其中α=0.37;σ_0是除位错交互作用外其他因素对流变应力的贡献,对于600℃等温30秒,40分和3小时者,σ_0分别为34,30及30公斤/毫米~2。在α-Fe中沉淀析出的NbC粒子周围观察到“沉淀生长”位错圈,对其形成机理进行了分析,它们的强化作用尚需进一步探明。

 
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