独立增量过程的一个强逼近定理

该文给出了独立增量过程的一种强逼近定理,由此得到相应的ｓｔｒａｓｓｅｎ重对数律．     

最佳拉丁方与高级原幻方

本文证明了 (n ,2 ) =(n ,3) =1时 ,有n阶的正交的最佳拉丁方。若n =4k ,或n是个不为 3的奇数 ,则有n阶的正交的高级原幻方     

Some new HSOLSSOMs of types hn and 1m u1

In this paper, two new direct construction methods are given for holey self‐orthogonal Latin squares with a symmetric orthogonal mate (HSOLSSOMs). Some new HSOLSSOMs using already known methods are also given. The known existence results for HSOLSSOMs of types 1^m u¹ and hⁿ are improved; for type 1^m u¹ there remain just four possible exceptions with u odd and 3 ≤ u ≤ 15; for type hⁿ, there are just two possible exceptions remaining, for (h, n) = (6, 12) and (6, 18). As a byproduct, the known existence results for three holey mutually orthogonal Latin squares (3 HMOLS) are also improved. © 2001 John Wiley & Sons, Inc. J Combin Designs 9: 435–444, 2001     

无网格法在弹塑性问题中的应用

在弹塑性问题中引入无网格法,得到了弹塑性无网格法的控制方法;计算了中心裂纹板的塑性区分布以及极限荷载;数值结果表明了该方法的可行性和有效性。     

测量融合组合导航方法研究

讨论了测量融合组合导航的两种方法,提出并研究了应用极大似然的估计的测量融合方法,并将该方法与基于线性一均方估计的测量融合方法作了比较。仿真研究表明测量融合方法在组合导航系统中具有良好的应用价值,特别是基于极大似然估计的测量融合方法,充分利用了测量值的冗余信息,其融合效果更好,组合系统的精度也有较大幅度的提高。     

The Kato square root problem for higher order elliptic operators and systems on $ \Bbb R^n $

We prove the Kato conjecture for elliptic operators and N×N-systems in divergence form of arbitrary order 2m on . More precisely, we assume the coefficients to be bounded measurable and the ellipticity is taken in the sense of a G?rding inequality. We identify the domain of their square roots as the natural Sobolev space . We also make some remarks on the relation between various ellipticity conditions and G?rding inequality. Received May 4, 2001; accepted September 6, 2001.     

Volterra系统在平稳正态激励下的离散表示

Volterra响应系统是一种十分有用的数学模型 .本文着重讨论了在平稳正态激励下 Volterra响应系统的离散化问题 .即将激励过程 { x(t) ,t∈ [-T,T]}离散化 ,利用 Kac-Siegert的思想 ,以 Neal[1 ] 提出的表示定理为基础 ,直接地给出 Volterra响应系统的离散化的表示形式 .由于它是由激励过程直接地表示响应系统的形式 ,因而在实际计算 Volterra响应时有广泛的实用价值 .     

A direct method for obtaining discrete relaxation spectra from creep data

A direct method for obtaining discrete relaxation spectra from creep data is proposed. The conversion of creep data to relaxation data is avoided and the discrete relaxation times are freely adjustable. The nonnegative least square method is used to generate nonnegative discrete relaxation strength. Received: 10 November 1999 Accepted: 22 September 2000     

Crystal Structure and Spectroscopic Studies of Bis (morpholine dithiocarbamate) Nickel(II) Complex,Ni(C4H8ONCS2)2

The title compound has been prepared and characterized by EA, IR and TG spectral studies. The crystal structure of nickel (H) bis(morpholine dithiocarbamate) Ni(C₄H₅ONC‐S₂)₂ is determined by X‐ray diffraction methods. It crystallizes in the monoclinic system, space group P2₁/n, with lattice parameters a = 0.4288(1), b = 2.0526(4), c = 0.8333 (2) nm, β = 97.43(3)°, and Z = 2. In the structure, central Ni atom coordination geometry is slightly distorted square‐planar with the four S atoms from two morpholine dithiocarbamate ligands. The four Ni? S bond distances are in the range of 0.2199(5)–0.2201(2) nm. The ER spectral data are in agreement with the structural ones. The TG data indicate that it decomposed completely at the 766.89°C.     

Probabilistic Teleportation of n-Particle State via n Pairs of Entangled Particles

The teleportation of an arbitrary n-particle state is proposed when n pairs of entangled particles are utilized as quantum channels. It can be successfully realized with a certain probability which is determined by the smallest coefficients of n entangled pairs. Using a Latin square of order 2ⁿ, explicit expressions of two unitary operations corresponding to different Bell-basis measurements performed by Alice can be obtained at the end of Bob.