抽样检查方法中A.B.C三类不合格的确定方法

本文阐明了抽样检查中Ａ．Ｂ．Ｃ三类不合格的确定方法及过程，系ＩＶＥＣＯ汽车零部件国产化所得。     

Branched covers along real parts

It is shown that the double cover of a Kähler surface branched along the fixed point set of an anti-holomorphic involution admits a symplectic structure.

     

Specification of oscillating chemical models starting from a given linearized form

The Lotka-Volterra model is shown to be the simplest unique model among those models having the same linearized form. We also show that the two-dimensional explodator model is not unique in its own class: there are four models possessing the same linearized form. Finally, we propose a method for the construction of formal chemical models having prescribed properties (i.e. having prescribed a type of one or more equilibrium points).     

非均匀弦的驻波实验

用自制的线密度为ρ（ｘ）＝ａｘ形式的非均匀弦进行驻波实验，取得较好效果，它可以作为对原有的均匀弦驻波实验的改进或开放性实验安排到普物实验中去。     

An example of a maximal unimodular Dirichlet algebra

We construct an example of a maximal unimodular Dirichlet algebra whose one-point Gleason parts are dense in the maximal ideal space. The main statements were announced in [1] and now we provide their complete proofs.     

Variationally derived scaling and variable metric updates from the preconvex part of the Broyden family

The paper is devoted to a general variational approach for scaling the variable metric updates. A new method from the preconvex part of the Broyden family is given which minimizes not only the generalized Frobenius norm but also the condition number of the update. The computational efficiency of this method, with both preliminary and controlled scaling strategy, is demonstrated on sufficiently difficult test problems.     

The Generalized Delay-Locked Loop

The delay-locked loop (DLL) is a synchronization device that is widely used for PN-code tracking in spread spectrum systems. The error detector characteristic (S-curve) of the DLL has a major impact on the performance. Using more than two correlators will extend the tracking range of the S-curve. The Generalized DLL (GenDLL) theory provides a concept to analyze a large class of DLL configurations including the classical DLL. The focus of the performance criteria is on tracking jitter and the mean time to lose lock (MTLL). It is shown that the MTLL can be considerably improved by using extended S-curves. However, the tracking jitter is increased by additional correlators. The tradeoff between the two criteria is explained. With the GenDLL theory loop configurations can be designed having both low tracking jitter and high loop robustness against loss of lock.     

Heckman-Opdam's Jacobi polynomials for the BCn root system and generalized spherical functions

We prove that the radial part of the Laplacian on the space of generalized spherical functions on the symmetric space GL(m+n)/GL(m)×GL(n) is the Sutherland differential operator for the root system BC_n and the radial parts of the differential operators corresponding to the higher Casimirs yield the integrals of the quantum Calogero-Moser system. It allows us to give a representation theoretical construction for the three parameter family of Heckman-Opdam's Jacobi polynomials for the BC_n root system.