Analysis of environmental factors about cerebral stroke

In this paper, the disease of cerebral stroke is studied mainly. According to the basic information of the patient, Linear fitting method is applied to calculate between the number of sick and age by using MATLAB software. According to data of pressure, temperature and humidity, nondimensionalizing by normalization method, linear regressions are analysed between the number of the patient and pressure, temperature, humidity. According to the important feature and the key indicators of cerebral stroke, high-risk groups are proposed to the early warning and intervene.

Preparation and Ablation Properties of W/TaC Cermet via in-situ Reaction Sintering Process

An attractive way to prepare W/TaC based cermet at a relatively low temperature was proposed and confirmed experimentally. The thermodynamics calculations indicated that the reaction between WC and Ta2O5was feasible at as low a temperature as 1 400 ℃. The experimental results showed that W/TaC cermet could be fabricated by in-situ reaction sintering process at 1400 ℃ for 2 h in vacuum. The open porosity and bulk density of the W/TaC cermet were 15.3% and 13.4 g/cm3. Further, the microstructural features revealed that W, TaC, and Ta2WO8were identified to be the main constituents of the W/TaC cermet. The mass lose rate and linear recession rate of the W/TaC cermet during an oxyacetylene torch test were 0.0048 g/s and 0.0233 mm/s, respectively. The high porosity, the presence of Ta2WO8phases within W/TaC and evaporation of WO3on the surface of the composite contributed to the decrease of ablative property when comparing with pure W.

THE ANTI-PLANE SHEAR FIELD IN AN INFINITE SLAB OF ELASTO-DAMAGED MATERIAL WITH A SEMI-INFINITE CRACK

This paper deals with an infinite slab with a semi-infinite crack,which is subjected to the anti-plane shear k_Ⅲ field at infinity.The slab is made of an elasto-damaged material.Analytical solution is obtained by use of conformal mapping.The shape of damaged-zone,the dissipative energy,the shear open- ing displacement on the crack surface and several stress distribution curves are given.The far field condition is checked,The asymptotic behavior near the crack-tip is given.

Merging Programming of MATLAB and VB

This paper is aimed at the realization of merging progrramming of MATLAB and VB.We mainly discuss how to realize merging pro- gramming by MATLAB Automation Server technology,and demonstrate how to incorporate visual programming interface of VB with the power- ful function of MATLAB in numerical calculation and graphic display.

A Modern Method for Constructing the S-Box of Advanced Encryption Standard

The substitution table (S-Box) of Advanced Encryption Standard (AES) and its properties are key elements in cryptanalysis ciphering. We aim here to propose a straightforward method for the non-linear transformation of AES S-Box construction. The method reduces the steps needed to compute the multiplicative inverse, and computes the matrices multiplication used in this transformation, without a need to use the characteristic matrix, and the result is a modern method constructing the S-Box.

On the Issue of Bilingualism in Terms of Independence of Uzbekistan

This article examines the theory of bilingualism: types of bilingualism, the causes of bilingualism and development of national-Uzbek bilingualism in the context of the national independence of Uzbekistan. According to the author, development of bilingualism in various forms is an important factor in strengthening national consolidation, enhancing the economy and culture of Uzbekistan. The author analyzes the theoretical, historical and socio-poli-tical aspects of development of bilingualism.

Powers of Octonions

As it is known, Binomial expansion, De Moivre’s formula, and Euler’s formula are suitable methods for computing the powers of a complex number, but to compute the powers of an octonion number in easy way, we need to derive suitable formulas from these methods. In this paper, we present a novel way to compute the powers of an octonion number using formulas derived from the binomial expansion.

Evaluation of ERP Systems Quality Model Using Analytic Hierarchy Process (AHP) Technique

The Enterprise Resource Planning (ERP) system is a complex and comprehensive software that integrates various enterprise’s functions and resources. ERP system cleanly encapsulates crosscutting concerns which cannot be encapsulated by other types of information systems like data synchronization and standardization, system complexity and system modularity. Many studies are conducted to propose software quality models with their quality characteristics. However, there is currently no dedicated software quality model that can describe and involve new features of ERP systems. Thus, this study has proposed an ERP system quality model (ERPSQM). Analytic Hierarchy Process AHP has been employed to evaluate the quality of ERPSQM. Furthermore, this proposed model can be used to make a comparison of ERP systems to help companies implement better systems.

RBF-FD Method for Some Dispersive Wave Equations and Their Eventual Periodicity

In this paper,we approximate the solution and also discuss the periodic behavior termed as eventual periodicity of solutions of(IBVPs)for some dispersive wave equations on a bounded domain corresponding to periodic forcing.The constructed numerical scheme is based on radial kernels and local in nature like finite difference method.The temporal variable is executed through RK4 scheme.Due to the local nature and sparse differentiation matrices our numerical scheme efficiently recovers the solution.The results achieved are validated and examined with other methods accessible in the literature.

On Rijndael ByteSub Transformation

The first step in converting a plaintext to ciphertext by the famous Advanced Encryption Standard (AES), which is called Rijndael ByteSub Transformation, involves some operations: computing a multiplicative inverse, multiplying this multiplicative inverse by a specific matrix, and adding the result to a specific vector. The purpose of this research is to simplify these operations. This paper gives elegant techniques and presents the matrices multiplication as simple XOR operations, and the result is a simple, straightforward way finding the transformation.

New Formula for Computing Quaternion Powers

In this work, we create a new mathematical formula that computes the power of a quaternion number raised to a positive integer by reducing the real matrix of order 4 × 4 that we take to represent this quaternion number to a matrix that makes the process of multiplying this quaternion number by itself simpler. We also present a new method for computing the power of a real matrix of order 2 × 2 as an application of this formula.

An investigation of machine learning based automatic classification of Chinese books

Faced with the ever-increasing amount of books published,the library cataloging staff feel more and more difficult to classify books manually.How to realize automatic book classification by using computers is a critical question in digital library construction.This paper attempts to introduce the machine learning algorithms,such as BP neural network and Support Vector Machine,into the practice of book classification.A machine learning based hierarchical book classification system model is estabUshed according to the Chinese Library Classification.Related design approaches are proposed to describe a bibliography by using characteristic weighting method and the focus is on the construction of the shallow classification systems.Large-scale experiment is conducted to justify the feasibility and appropriateness of this model.This research basically solves the problem of automatically classifying books without subject indexing.