光切法三维轮廓测量中数据缺损修复的图象合成方法

本文分析了光切法三维轮廓自动测量中产生的数据缺损的类型和原因,并基于人体双目视觉原理中的“无影性”提出了数据修复的图象合成方法,导出了其数学模型,给出了数据修复的实验装置和结果.     

相位错动强度叠加光刻法

本文提出一种新的光栅相位错动强度叠加光刻法.研制出了高质量的圆光栅,该方法同样适用于各种计量光栅的研制.     

整函数及其微分多项式的唯一性

本文证明如下定理：设ｆ（ｚ）为非常数整函数，Ｐ（ｆ）－ｆ￣（ｎ）（ｚ）＋ａ＿１（ｚ）ｆ￣（ｎ－１）（ｚ）＋…ａ＿ｎ（ｚ）ｆ（ｚ），其中ａ＿１（ｚ）ａ＿２（ｚ），…ａ＿ｎ（ｚ）为ｆ（ｚ）的小整函数，若ｆ（ｚ）与Ｐ＿（ｆ）以两个互为判别的有穷复数ａ，ｂ为ＣＭ－分担值，且ａ＋ｂ≠０或者，则ｆ≡Ｐ（ｆ）     

Constitutive modelling of nonproportional cyclic plasticity

A multiplicative hardening function and a unified evolution rule of the hardening factors are proposed. The hardening factorf ₁ is introduced to describe cyclic hardening with respect to the plastic strain range, whilef ₂ andf ₃ describe, respectively, instantaneous and hereditary additional hardening with respect to the nonproportionality of the plastic strain path. Two material dependent memory parametersa ₁ anda ₃ are introduced to keep the memory of the largest cyclic and additional hardening in the previous plastic deformation history. Different hardening mechanisms are then embedded into a thermomechanically consistent constitutive equation through the hardening function. The constitutive response of 304 and 316 stainless steels subjected to biaxial nonproportional cyclic loading is analyzed and the proposed model is critically verified by comparing the results with experimental results obtained by Tanaka et al., and Ohashi et al. The project supported by National Natural Science Foundation of China     

Dispersion and Attenuation of Surface Waves in a Fluid-Saturated Porous Medium

An investigation is conducted of propagation of surface waves in a porous medium consisting of a microscopically incompressible solid skeleton in which a microscopically incompressible liquid flows within the interconnected pores, and particularly the case where the solid skeleton deforms linear elastically. The frequency equations of Rayleigh- and Love-type waves are derived relating the dependence of wave numbers, being complex quantities, on frequency, as a result those waves are dispersive as well as inhomogeneous. Nevertheless, the amplitudes of both surface waves attenuate along the surface of the porous medium, whereas they decay exponentially receding from the surface of the medium.     

Propagation of acceleration waves in incompressible saturated porous solids

Within the framework of the incompressible porous media model, the propagation properties of acceleration waves in liquid-filled porous solids is discussed. The incompressibility of the two constituents in the model forces the amplitudes of the longitudinal waves in the skeleton and in the liquid to satisfy a certain relation. The two propagation speeds are presented by examination for the existence of acceleration waves and only longitudinal and transverse waves are realizable in the incompressible two-phase porous materials.     

普鲁士兰修饰电极的现场X射线衍射研究

利用Ｘ射线衍射仪－电化学装置－两台微机联机组成的Ｘ射线衍射差谱全自动电化学测量系统，并结合特制的电解池，现场测定了普鲁士兰修饰电极薄膜在电化学变过程中的Ｘ射线衍射差谱。结果证实在变色过程为了平衡体系电荷而进入和脱出修饰薄摸的Ｋ＾＋导致了薄膜晶体结构的转变。理论计算的Ｘ射线衍射差谱与实测结果基本一致。     

Theoretical Analysis of an Uqp(u2) Model for Ground-State Bands in Even-Even Nuclei

The validity of an U_qp(u₂)model for the nuclear rotational spectrum is systematically analysed by investigating the Mallmann plots and fitting the experimental data for the even-even rare-earth and actinide nuclei.The results show that the theoretical values obtained from the U_qp(u₂) model are in a good accordance with the experimental findings.Thus the U_qp(u₂) model has some advantages over the SU_q(2)model as far as energy levels are concerned. Further more,a relationship between the parameters of deformations and the nuclear softness is also established.     

SUSY Virtual Effects on the Production of tq at LEPPI

Virtual effects of supersymmetry on the-flavor changing process at LEPII are calculated in the minimal supersymmetric standard model (MSSM). We analyze the cross section of e⁺e^- → γ, Z⁰ → tq, and find that even for the most distinguishable mode e⁺e^- → γ, Z⁰ → tc, the effect is small compared with the SM expectation.