三维模糊控制关系阵自动生成软件

介绍了一个新型的三维模糊调节器和相应的模糊关系阵自动生成软件，这种调节器调节灵敏，静态精度高，可以克服普遍二维模糊控制中常见的稳态继电器效应。文中详细给出了相应的软件结构和算法，以及应用该软件形成的一个以三维模糊调节器为串级调节器并引入反馈模糊控制的控制系统，仿真实验是以典型的工业金属热处理炉温度控制为对象，计算机仿真结果表明控制效果良好。

布尔型关系矩阵的收敛性、特征模糊集及稳定性分析

指出了文[1]中部分错误,在此基础上分析了带有"max-product"合成运算的布尔型关系矩阵的稳定性,讨论了关系矩阵及模糊状态过程的收敛性,指出了稳定关系矩阵特征模糊集的确定办法及几种特殊情形下的算法.

基于改良三比值法的变压器故障模糊综合评判法

溶解气体分析(DGA)是目前变压器在线监测的主要手段,但DGA方法实际运用中还存在不足之处,为此建立了基于改良三比值法的变压器绝缘模糊综合评判法。该方法通过模糊数学的隶属度理论把变压器故障的评判由定性评判转化为定量评判,并通过其在变压器在线绝缘监测中的应用案例证明了此方法的有效性,还进一步对未来更好的综合评判法提出了设想。

基于分块特性的高光谱影像波段选取方法的研究

从高光谱影像波段间相关性强的特点出发,揭示高光谱影像各波段间相关系阵分块的特性,介绍基于波段间相关性的高光谱波段选取方法,即自适应子空间分解法及相关性过滤法。通过实验表明,该方法能较快地删除相关强的波段,可作为有效的波段预选方法。

Stochastic resonance based on correlation coefficient in parallel array of threshold devices

The phenomenon of stochastic resonance （SR） based on the correlation coefficient in a parallel array of threshold devices is discussed. For four representative noises： the Gaussian noise, the uniform noise, the Laplace noise and the Cauchy noise, when the signal is subthreshold, noise can improve the correlation coefficient and SR exists. The efficacy of SR can be significantly enhanced and the maximum of the correlation coefficient can dramatically approach to one as the number of the threshold devices in the parallel array increases. Two theorems are presented to prove that SR has some robustness to noises in the parallel array. These results further extend the applicability of SR in signal processing.

Approximate querying between heterogeneous ontologies based on association matrix

An approximate approach of querying between heterogeneous ontology-basedinformation systems based on an association matrix is proposed. First, the association matrix isdefined to describe relations between concepts in two ontologies. Then, a methodof rewriting queriesbased on the association matrix is presented to solve the ontology heterogeneity problem. Itrewrites the queries in one ontology to approximate queries in another ontology based on thesubsumption relations between concepts. The method also uses vectors to represent queries, and thencomputes the vectors with the association matrix; the disjoint relations between concepts can beconsidered by the results. It can get better approximations than the methods currently in use, whichdonot consider disjoint relations. The method can be processed by machines automatically. It issimple to implement and expected to run quite fast.

A Decorrelating DOA Estimation Based on the Principal Eigenvector for CDMA Frequency-Selective Fading Channels

A novel decorrelating DOA estimation algorithm of multipath signals for CDMA frequency selective fading channels based only on the principal eigenvector of its corresponding covariance matrix is proposed. The proposed algorithm has the advantages that the DOAs of the multipath signals can be estimated independently and all the other resolved multipath signal interference is eliminated. Simulation results show that this algorithm estimates the DOAs of multipath signals efficiently and accurately.

Simultaneous diagonalization of two quaternion matrices

The simultaneous diagonalization by congruence of pairs of Hermitian quaternion matrices is discussed. The problem is reduced to a parallel one on complex matrices by using the complex adjoint matrix related to each quaternion matrix. It is proved that any two semi-positive definite Hermitian quaternion matrices can be simultaneously diagonalized by congruence.

Risk assessment of floor water inrush in coal mines based on MFIM-TOPSIS variable weight model

Floor water inrush is one of the main types of coal mine water hazards.With the development of deep mining,the prediction and evaluation of floor water inrush is particularly significant.This paper proposes a variable weight model,which combines a multi-factor interaction matrix(MFIM)and the technique for order performance by similarity to ideal solution(TOPSIS)to implement the risk assessment of floor water inrush in coal mines.Based on the MFIM,the interaction between seven evaluation indices,including the confined water pressure,water supply condition and aquifer water yield property,floor aquifuge thickness,fault water transmitting ability,fracture development degree,mining depth and thickness and their influence on floor water inrush were considered.After calculating the constant weights,the active degree evaluation was used to assign a variable weight to the indices.The values of the middle layer and final risk level were obtained by TOPSIS.The presented model was successfully applied in the 9901 working face in the Taoyang Mine and four additional coal mines and the results were highly consistent with the engineering situations.Compared with the existing nonlinear evaluation methods,the proposed model had advantages in terms of the weighting,principle explanation,and algorithm structure.

Measurement of Similarity for Spatial Directions Between Areal Objects

Similarity for spatial directions plays an important role in GIS. In this paper, the conventional approaches are analyzed. Based on raster data areal objects, the authors propose two new methods for measuring similarity among spatial directions. One is to measure the similarity among spatial directions based on the features of raster data and the changes of distances between spatial objects, the other is to measure the similarity among spatial directions according to the variation of each raster cell centroid angle. The two methods overcome the complexity of measuring similarity among spatial directions with direction matrix model and solve the limitation of small changes in direction. The two methods are simple and have broader applicability.

Global Bounded Solutions for Reaction-diffusion Systems with a Full Matrix of Diffusion Coefficients and a Balance Law

This paper deals with an initial boundary value problem for the strongly coupledreaction-diffusion systems with a full matrix of diffusion coefficients. The global existence ofsolutions is proved by using the techniques based on invariant regions, Lyapunov functionalmethods, and local Lp prior estimates independent of time.

The application of fuzzy equivalence relation based on the quotient space in cluster analysis

A fuzzy clustering analysis model based on the quotient space is proposed. Firstly, the conversion from coarse to fine granularity and the hierarchical structure are used to reduce the multidimensional samples. Secondly, the fuzzy compatibility relation matrix of the model is converted into fuzzy equivalence relation matrix. Finally, the diagram of clustering genealogy is generated according to the fuzzy equivalence relation matrix, which enables the dynamic selection of different thresholds to effectively solve the problem of cluster analysis of the samples with multi-dimensional attributes.

Practical Method for Determining All the Minimum Solutions of Fuzzy Matrix Equation and Transitive Closure of Fuzzy Relation

In this paper,the new theory frame and practical methhod for determining all the minimum solutions of Fuzzy matrix equation and transitive closure of Fuzzy relation is described,and it has been carried out on the miero-computer quickly and accurately.

An Improved Direction Relation Detection Model for Spatial Objects

Direction is a common spatial concept that is used in our daily life. It is frequently used as a selection condition in spatial queries. As a result, it is important for spatial databases to provide a mechanism for modeling and processing direction queries and reasoning. Depending on the direction relation matrix, an inverted direction relation matrix and the concept of direction pre- dominance are proposed to improve the detection of direction relation between objects. Direction predicates of spatial systems are also extended. These techniques can improve the veracity of direction queries and reasoning. Experiments show excellent efficiency and performance in view of direction queries.

Free State Constructions

This paper attempts to investigate Free State （FS） in Hijazi Arabic. This structure is not used in Modem Standard Arabic. It was introduced into the Arabic dialects later on as a competing structure to the Construct State （CS）. First, we discuss the characteristics of this structure in comparison to its counterpart： the CS. we show that semantically FS can express only three semantic relations out of the five semantic relations CS can convey. Furthermore, the paper shows that the FS genitive exponent in HA ＂hagg＂ agrees with the head noun of the matrix DP in phi-features. The discussion then shifts to the origin of the genitive exponent hagg. The paper argues that it is originally a noun that has acquired a new meaning： an anaphor that means something like ＂one of＂. Hence, we gloss hagg as ANAPH. Contrary to previous analyses for the FS genitive exponent, the paper proposes that hagg, the noun, heads its own CS and it is linked to the preceding DP by a binding relationship, which involves feature agreement in gender and number. Consequently, we propose that hagg-headed CS has the same structure of the nominal CS. Finally, we investigate the occurrence of both FS and CS structures in HA and show when one structure is preferred to the other.

再论随机变量的相关性与因果性

随机变量之间的关系一直是统计学研究中的重要问题之一．在面对不同的问题时，选取合适的方法去判断随机变量间的关系已成为解决实际问题的关键所在．针对这一现状，从概率论中的条件概率和条件分布出发，对随机变量的相关性理论与格兰杰的因果性理论进行了详细的讨论和分析，给出了判断随机变量由相关性（线性到非线性演化）到格兰杰因果性的方法．结果对于理解和把握随机变量的关系，给出恰当的判断，是有益的一种探索．

Thermodynamic properties and constitutive relations of crystals at finite temperature

The dynamics equation for each individual atom is established directly around the equilibrium state of the system of N atoms based on the inter-atomic potential energy of EAM model.Using the theory of lattice dynamics and periodical boundary condition,the 3N×3N stiffness matrix in eigen equations of vibration frequencies for a parallelepiped crystal is reduced to a 3n×3n matrix of eigen equations of vibration frequencies for a unit lattice.The constitutive relation of the crystal at finite temperature is extracted based on the quantum-mechanical principle.The thermodynamic properties and the stress-strain relationships of crystal Cu with large plastic deformation at different temperatures are calculated,the calculation results agree well with experimental data.

General compliance transformation relations for all seven crystal systems

For crystals, the compliance (sij) and the stiffness (cij) matrices are specified in the orthogonal coordinate systems (Yi), which do not coincide with the crystal axes (Xi) commonly used except for cubic and orthorhombic crystal systems. Transformations have been done in this paper and the general compliance transformation relations from the orthogonal coordinate systems (Yi) to the measurement systems (Mi) are given for all seven crystal systems. Accordingly, useful expressions for Young's modulus E and Poisson's ratio are also derived.

Theoretical model of double-walled carbon nanotube pullout from a composite matrix

A micromechanical model of double-walled carbon nanotube (DWCNT) pullout from a composite matrix is presented with the interfacial residual stress and van der Waals (vdW) forces taken into consideration.The interfacial residual stress induced by thermal expansion coefficient (TEC) mismatch is introduced via thermo-elastic constitutive relations.The influence of vdW interactions between two layers of DWCNT on the interfacial stress distributions of DWCNT and matrix is analyzed.The analytical expressions of interfacial shear stress and the axial stresses of DWCNT and matrix are derived,respectively.Furthermore,the influences of temperature change,interfacial friction coefficient,DWCNT aspect ratio,DWCNT volume fraction and the relative modulus between DWCNT and matrix are illustrated and discussed.