中国科学院机构知识库网格系统: 检索

Simulations of deformation and damage processes of SiCp/Al composites during tension 期刊论文 OAI收割
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2018, 卷号: 34, 期号: 4, 页码: 627-634
作者: Zhang, JF; Zhang, XX; Wang, QZ; Xiao, BL; Ma, ZY

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收藏 | 浏览/下载：29/0 | 提交时间：2018/06/05

Metal-matrix Composites Strain-gradient-plasticity Particle-size Mechanical-properties Silicon-carbide Representative Volume Interfacial Strength Conventional Theory Hybrid Composites Fracture

A trans-scale model for size effects and intergranular fracture in nanocrystalline and ultra-fine polycrystalline metals 期刊论文 OAI收割
COMPUTATIONAL MATERIALS SCIENCE, 2012, 卷号: 57, 页码: 2-7
作者: Wu B(吴波); Liang LH(梁立红); Ma HS(马寒松); Wei YG(魏悦广); Wei, YG

收藏 | 浏览/下载：26/0 | 提交时间：2013/01/18

Interface energy effect Strain gradient effect Intergranular fracture Nanocrystalline metal Cohesive model Strain Gradient Plasticity Nanoindentation Test Mechanical-Behavior Conventional Theory Crack-Growth Deformation Solids Interface Nickel

An enhanced FEM model for particle size dependent flow strengthening and interface damage in particle reinforced metal matrix composites 期刊论文 OAI收割
Composites Science and Technology, 2011, 卷号: 71, 期号: 1, 页码: 39-45
J. C. Shao; B. L. Xiao; Q. Z. Wang; Z. Y. Ma; K. Yang

收藏 | 浏览/下载：19/0 | 提交时间：2012/04/13

Particle-reinforced composites Debonding Strength Modeling strain-gradient plasticity conventional theory behavior deformation aluminum mechanisms

Simulation of effects of particle size and volume fraction on Al alloy strength, elongation, and toughness by using strain gradient plasticity concept 期刊论文 OAI收割
Materials & Design, 2011, 卷号: 32, 期号: 1, 页码: 353-360
L. Zhou; S. X. Li; S. T. Huang

收藏 | 浏览/下载：112/0 | 提交时间：2012/04/13

ultrafine-grained aluminum conventional theory matrix composites microbend test indentation fracture deformation

How do children coordinate information about mental states with social norms? 期刊论文 OAI收割
COGNITIVE DEVELOPMENT, 2011, 卷号: 26, 期号: 1, 页码: 72-81
作者: Wang, Fei; Zhu, Liqi; Shi, Kan

收藏 | 浏览/下载：22/0 | 提交时间：2015/08/24

Social norm Theory of mind Contextually conventional rule Coordination Chinese culture

A New Hybrid DFT Approach to Electronic Excitation and First Hyperpolarizabilities of Transition Metal Complexes 期刊论文 OAI收割
Journal of Computational Chemistry, 2009, 卷号: 30, 期号: 13, 页码: 2056-2063
J. Lin, K. C. Wu and M. X. Zhang

收藏 | 浏览/下载：22/0 | 提交时间：2012/11/06

hybrid exchange functional organometallic molecule conventional density functional optical property nonlinear-optical properties generalized-gradient-approximation density-functional theory quadratic hyperpolarizabilities organometallic complexes dipole-moment exchange functionals correlation energies carbonyl-complexes acceptor groups

Simulations of Mechanical Behavior of Polycrystalline Copper with Nano-Twins 期刊论文 OAI收割
Acta Mechanica Solida Sinica, 2008, 页码: 189-197
作者: Wu B(吴波)

收藏 | 浏览/下载：598/43 | 提交时间：2009/08/03

Nanocrystalline Twinned Copper Mechanical Behavior Cohesive Model Finite Element Simulation Strain-Gradient Plasticity Conventional Theory Rate Sensitivity Nanocrystalline Nickel Ultrahigh-Strength Crystal Plasticity Fracture Metals Interface Solids

Small scale, grain size and substrate effects in nano-indentation experiment of film-substrate systems 期刊论文 OAI收割
International Journal of Solids and Structures, 2007, 卷号: 44, 期号: 13, 页码: 4492-4504
作者: Chen SH(陈少华); Liu L(刘磊); Wang ZQ(王自强)

收藏 | 浏览/下载：967/46 | 提交时间：2009/08/03

Nano-Indentation Hardness Film-Substrate System Classical Plasticity Theory Strain Gradient Plasticity Theory Indenter Tip Curvature Fem Strain Gradient Plasticity Depth-Sensing Indentation Indenter Tip Radius Thin-Films Length Scale Mechanical-Properties Conventional Theory Deformation-Theory Matrix Composites Single-Crystals

An improved adaptive neural network method for control system (EI CONFERENCE) 会议论文 OAI收割
2006 International Conference on Machine Learning and Cybernetics, August 13, 2006 - August 16, 2006, Dalian, China
Wang L.-M.; Xie M.-J.; Wu D.-Y.

收藏 | 浏览/下载：15/0 | 提交时间：2013/03/25

Classical methods for designing a controller depend on the accuracy of system model. However plant's models and other parts in a physical system can not accurately represent all possible dynamics. Thus the controller designed is usually not the optimal one. In this article a new simple adaptive control method which combines the classical frequency domain method with the neural network theory is proposed. Firstly we can obtain a controller using classical method. Secondly we use the coefficients in digitized controller equation as the initial values of an Adaline network. Finally LMS learning rules is used to adjust the weights adaptively. Experimental results show that this method is very effective in improving the performance of conventional controller. 2006 IEEE.

Study on LD-pumped Nd:YAG laser cutter (EI CONFERENCE) 会议论文 OAI收割
ICO20: Lasers and Laser Technologies, August 21, 2005 - August 26, 2005, Changchun, China
作者: Zhang G.; Zhang G.; Zhang G.; Zhang J.; Zhang J.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

The theory of laser cutter and the technology neck is analyzed. We can conclude that it is almost impossible to deal with the waste thick silicon wafers which are yielded in producing silicon wafers by conventional eroding or diamond cutting when the cutting velocity equals 100mm/min while it is also unperfected with ecumenical laser cutter without good beam quality or precise laseroptics system. It is represented that high average power and high repetition rate laser with good beam quality and precise laseroptics system are pivotal to obtain excellent cutting effect such as thick groove depth double-layer 0.75mm thick silicon wafer can be penetrated.. The cross section is fine and the groove is narrow rapid cutting speed the cutting quality meets the expecting demand. fine kerf section without considering the effect of technique. Considering laser medium thermal lens effect and thermal focal length changing with pumping power using plano-convex high reflectivity mirror as the back cavity mirror to compensate the heat lens influence a /4 waveplate to compensate heat -induced birefraction utilize the Nd:YAG self- aperture effect more than 50 W average power 1.064 um IR output is obtained with beam quality factor (M2) equals 3.19. Through the LD-Pumped Nd:YAG laser cutter we developed with short focus length negative spherical aberration focusing lens double axis linear step motor positioning system suitable beam expander multiplying factor appropriate diameter of exit beam aperture proper repetition rate when the cutting velocity equals 400mm/min 0.75mm thick silicon wafer can be penetrated