7,078 Result(s)

Article

The distribution of density of gap states for phosphorus doped amorphous silicon measured by DLTS

A density-of-state distribution in pseudo-gap of phosphorus-dopeda-Si: H material prepared by glow-discharge method has been measured experimentally by deep level transient spectroscopy. A minimum value of 7×10¹⁵

Du Yongchang, Zhang Yufeng, Yang Datong, Zhang Guanghua… in Journal of Electronics (China) (1985)

Article

The nonlinear interaction between different wave components and the process of index cycle of general circulation

By using a two-level quasi-geostrophic truncated spectral model taking account of the nonlinear interaction between different wave components (i. e. basic current, ultra-long waves and long waves), the index c...

Xu Youfeng in Advances in Atmospheric Sciences (1986)

Chapter and Conference Paper

A New Variational Approach for Mindlin Plates

The kinematic assumption of Mindlin Plate Theory is more reasonable for many cases than classical plate theory. Unfortunately, this assumption often results in over stiff solutions for thin plates. In this pap...

**e Yu, Li Rufeng, **e Zhicheng in Computational Mechanics ’88 (1988)

Article

A horizontal small sized backfire antenna using circular dipole

In this paper, a horizontal small sized (≈ 0.5 λ) backfire antenna with the circular dipole is described. The antenna structure and experimental results are given. The experimental results demonstrate that the...

Song **ming, Li Ruihua, Zhang Yufeng, Rao Boliang in Journal of Electronics (China) (1988)

Article

Local stability of one-dimensional population models. The critical case:f'(x)=±1

This paper studies a problem on the local stability of discrete one-dimensional population models and gives a new, easily applicable method to test the local stability of the equilibriumx in the critical casef'(x

H. Yongnian, X. **ufeng in Biological Cybernetics (1990)

Article

The possible topologic structure types of orthopyroxene with space groupP2 ₁ ca

The possible topologic structure types of orthopyroxene with space group P2₁ca comprise four kinds of tetrahedral chains and four kinds of octahedral sites, all of which are non-equivalent in sym metry. In these ...

Luo Gufeng, Lin Chengyi, Xu Huifang in Chinese Journal of Geochemistry (1990)

Article

The THUDSOS distributed operating system

The THUDSOS is a distributed operating system modeled as an abstract machine which provides decentralized control, transparency, availability, and reliability, as well as a good degree of autonomy at each node...

**anzhi Liao, Xufeng Liu, Lan ** in Journal of Computer Science and Technology (1991)

Article

Magnetoresistance of Magnetically Uncoupled Multilayered Structures

The magnetoresistive effect first observed in Fe/Cr and other antiferromagnetically coupled metallic multilayered structure, has also been observed, albeit somewhat attenuated, in structures where the magnetic...

Shufeng Zhang, Peter M. Levy in MRS Online Proceedings Library (1991)

Chapter and Conference Paper

Influence of Weldmatching on Mechanical Behaviours

Different tests were carried out on the butt joints of several kinds of steels to study the effects of weldmatching on the fracture or strength, and fatigue behaviour of welded constructions. The effects of we...

Huo Lixing, Zhang Yufeng, Wang Lijun in Mechanical Effects of Welding (1992)

Chapter and Conference Paper

Space-Time ARMA Models for Satellite Ozone Data

In this paper, we develop some space-time autoregressive moving-average (ARMA) models for satellite ozone data, in which both the geographic neighbor effects and time-lag effects are considered. For the global...

Xufeng Niu, Michael Stein in Computing Science and Statistics (1992)

Chapter and Conference Paper

Measurement and Analysis of ⁹⁸Mo(n,γ)⁹⁹Mo Reaction Cross Section

Neutron capture cross sections of ⁹⁸Mo have been measured relative to that of ¹⁹⁷Au for neutron energy from 29 to 1100 KeV, using the activation method. Neutrons were generated via the ⁷Li(p,n)⁷Be and T(p,n) ³He ...

Wang Chunhao, **a Yijun, Long **anguan… in Nuclear Data for Science and Technology (1992)

Article

Dissipative structures of rock-and ore-forming systems in faults

The dissipative structure is an ordered structure. When a system is far from reaching equilibrium in the condition of non-equilibrium and exchanges some energy and material with the surroundings, this structur...

Yan Sun, Shufeng Yang, Qinglong Zhang, Weidong Cui in Chinese Journal of Geochemistry (1992)

Article

Organic rare-earth compounds as a new latent accelerator for curing of epoxy/anhydride system

A seriesof organic rare-earth compounds has been found to be a latent accelerator for curing the epoxy resin/anhydride system. Incorporation of rare-earth ions into the epoxy resin caused an increase in the gl...

**nsheng Peng, Yongxian Song, Rongxian Li, **ufeng Song in Polymer Bulletin (1992)

Chapter

The Influence of Magnetism and Structure on Transport Properties and Interlayer Coupling of Systems in Reduced Dimensions

Recent attention has been focused on magnetic multilayered structures and thin films containing magnetic granules which display a new magnetoresistive (MR) effect. This effect, first found in Fe/Cr multilayere...

Peter M. Levy, Horacio E. Camblong… in Magnetism and Structure in Systems of Redu… (1993)

Article

Microstructure and properties of SiC fibre-reinforced glass-ceramic composite

Zhu Peinan, Guo **gkun, Yang Hanmei, Zhang Yufeng… in Journal of Materials Science Letters (1993)

Article

Ground state and response properties of mercury clusters

The change of the cohesive energy and the optical absorption spectra of small singly sized Hg clusters is discussed. The cohesive energy allows one to determine the different regimes of chemical bonding. The o...

Hellmut Haberland, Bernd von Issendorff… in Zeitschrift für Physik D Atoms, Molecules … (1993)

Article

A critical evaluation of theories for predicting microcracking in composite laminates

We present experimental results on 21 different layups of Hercules AS4 carbon fibre/3501-6 epoxy laminates. All laminates had 90 ° plies; some had them in the middle ([(S)/90_n]_s) while some had them on a free sur...

John. A. Nairn, Shoufeng Hu, Jong Seok Bark in Journal of Materials Science (1993)

Article

Influence of Superlattice Potentials on Transport in Magnetic Multilayers

We discuss the effect of the superlattice potential on the magnetotransport properties of magnetic multilayers for current parallel and perpendicular to the plane of the layers. While quantum well states affect t...

Shufeng Zhang, Peter M. Levy in MRS Online Proceedings Library (1993)

Chapter

A Simple Proof for a Result of Ollerenshaw on Steiner Trees

We give a simple proof for a result of Ollerenshaw that if two full Euclidean Steiner trees exist for four points, then the one with a longer edge between two Steiner points is the shorter tree. In addition, w...

**ufeng Du, Ding-Zhu Du, Biao Gao, Lixue Qü in Advances in Optimization and Approximation (1994)