Solidification microstructure and phase constitution of Fe-7.5%Mo-16.5%Si ternary quasiperitectic alloy

Solidification of Fe-7.5%Mo-16.5%Si ternary quasiperitectic alloy is investigated by using differential scanning calorimetry (DSC) and drop tube containerless processing techniques.The primary phase is identified as R (Fe5Mo3Si2) and the quasiperitectic phases are τ1 (Fe5MoSi4) and Fe3Si.With the decrease of droplet diameter, the cooling rate and undercooling of the droplets in-crease rapidly.The experiment result indicates that the solidification microstructure is composed of remnant primary phase, qua-sip...     

Dimension Estimate of the Global Attractor for a 3D Brinkman-Forchheimer Equation

In this paper, we study the dimension estimate of global attractor for a 3D Brinkman-Forchheimer equation. Based on the differentiability of the semigroup with respect to the initial data, we show that the global attractor of strong solution of the 3D BrinkmanForchheimer equation has finite Hausdorff and fractal dimensions.     

Anhui23500)At present a variety of teaching methods are being used i

music teaching in teachers'college.Based on this,vocal teaching should have its definite cultivating goals of different lev驮鲋?亿元,产销额增长50倍、上缴利税增长20倍,成长为目前中国最大的民营水力发电设备制造商,被业界誉为神话。企业连续摘取"中国工     

无机化学课堂讨论课浅谈

本文从师范教育的特点出发，阐述了课堂讨论课在大一无机化学教学中的作用，认为它与其它授课方法有着互补性，并对建立系列化和层次化的内容体系提出了看法。     

R&R Analysis for Measurement System Using Moving Range

1　IntroductionMetrology is an important aspect of manufacturing because measurements are necessaryfor monitoring and controlling processes. The quality of data depends on the gauges andother tools used for the measurementof measured variables.With the greater reliance onquantitative measurements in modern manufacturing industry,the criticality of gauge ca-pability analysis has increased.The goal of gauge capability analysis is the understandingand quantification of the sources of variability …     

STUDY ON AN SIS EPIDEMIC MODEL WITH TIME VARIANT DELAY

In this paper, we study an SIS epidemic model with a time variant delay. By means of Liapunov functional, some sufficient conditions of global stability to endemic equilibrium and disease free equilibrium have been obtained. The influence of time delay on the stability of equilibria is displayed.     

COMPARATIVE ANALYSIS ON TRADITIONAL PROCUREMENT AND E-PROCUREMENT STRATEGY OF SUPPLY CHAIN

1 Introduction For most of the industrial enterprises, the procurement of materials, components and parts is the first step of manufacturing Therefore, procurement management is very important for reducing total cost of supply chain, improving products quality, and shortening operation cycle Procurement management has been the most valuable part in supply chain management It is forecasted that the typical decision-makingissues of supply chain in future will focus on the field of procurement ma…     

Escape probability based routing for ad hoc networks

1. INTRODUCTION Mobile ad hoc networks are wireless multi-hop networks where mobile nodes are self-organized, have highly dynamic topology, limited bandwidth and no support of fixed infrastructure[1]. These characteristics often cause ad hoc networks to be viewed as quite different from traditional networks. Routing a packet from a source to a destination in an ad hoc network is a challenging problem. The main source of the challenge comes from the fact that there are no base stations in …