Al2O3在钒钛烧结矿中的行为研究

针对攀钢钒钛烧结矿Al2O3含量高的情况，在实验室对Al2O3在钒钛烧结矿中的行为进行了试验研究，结果表明，Al2O3含量增加对钒钛烧结矿的产量，质量有不利影响，钒钛烧结矿中的Al2O3主要以固溶体形式贮存于除钙钛矿外的其他矿物相，它对烧结矿的矿物组成和结构有较大的影响。     

曲面的第Φ_r-形式在广义Ⅱ-等距下的公式

给出曲面的第Φr 形式在广义Ⅱ 等距下的公式的概念.借助混变张量,得到曲面的第Φr 形式在广义Ⅱ 等距下的公式.     

SiC颗粒增强铝基复合材料切削表面分形维数及其与抗磨损性能的关系

做为一种耐磨性能很好的材料 ,SiC颗粒增强铝基复合材料切削加工表面具有分形特征。实际研究表明SiC颗粒增强铝基复合材料切削加工表面分形维数与抗磨损性能有密切关系 ,本文还分析了表面分形维数越大其抗磨损性能越强的机理。     

Constructing a short form of the Smoking Consequences Questionnaire with adolescents and young adults.

The goal of the present studies was to construct and validate a short form of the 50-item Smoking Consequences Questionnaire (SCQ; T. H. Brandon & T. B. Baker, 1991), a measure of smoking outcome expectancies. In Study 1, a 21-item short form (S-SCQ) was derived from a sample of 107 young adults previously treated for substance abuse. In Study 2, the measure was cross-validated on 125 adolescents in treatment for substance abuse. Confirmatory factor analyses revealed good model fit and factorial invariance for the 4 S-SCQ subscales across both samples. Validation analyses on each sample found that subscale scores generally correlated significantly with smoking-related variables. The present studies provide initial evidence for the utility of the S-SCQ when used with young adults and adolescents. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

基于极化不变量的飞机目标识别

基于宽带毫米波极化雷达体制背影，通过极化不变量之一的去极化系数，研究了飞机目标的极化散射特性，并提取了极化特征，设计了飞机目标的分类或识别器结构，它能对五种飞机目标进行有效的分类或识别。     

超辐射发光二极管的结构特性及其应用

近几年来,由于超辐射发光二极管在光纤陀螺和光时域反射仪等方面的重要应用,已引起了人们的极大关注,许多国家都在竞相研制和开发.本文综述了目前超辐射发光二极管的主要结构和特性及其应用前景.     

我国第一套Φ170mm三辊轧管机组

介绍了我国第一套Φ１７０ｍｍ三辊轧管机组热轧设备和产品规格及技术特点。     

FEATURE SOLID MODELING TOOL SYSTEM:FSMTS

In conformity with the principle of Design for Manufacture,feature-based design strate-(?)es have been developed.As the“feature”is relevant to the“macro process plan”and“macro NCprograms”,obviously,“feature”is beyond the power of conventional solid modellers.Neverthe-less,substantial breakthrough has not been made in the solid modeling field,except“feature at-taching”or“feature recognizing”methods have been taken on.In this paper,the theory,concepts,system architecture,and algorithm principles of solid modeling tool system have beenrepresented.The practice of Feature Solid Modeling Tool System (FSMTS) developed atHuazhong University has proved that the tool may be a new foundation of Feature-Based Design.