The influence of Equal Channel Angular Pressing(ECAP) deformation on the microstructure and magnetic properties of a semi-magnetic alloy,2J4,was studied.In the process,the sample is pressed from one pass to the next pass directly without rotation.Results show that the microstructures of 2J4 alloy deformed by ECAP at room temperature are obviously refined.Part of original austenite transforms into martensite,the larger the deformation,the higher the transformation fraction of martensite.The magnetic retardation performance of the specimen deformed by ECAP is better than that deformed by cold rolling with similar deformation.It has higher coercive force(Hc),remanence(Br) and larger magnetic energy(Pro).ECAP deformation is new approach for fabricating high performance magnetic materials with high material utilization and low production cost.

Stochastic programming model(SPM)is widely used in asset and liability management by many financial institutions and individual investors for its special merits.It's an essential step to describe future uncertainty(often named scenario generation)accurately to ensure its successful utilization.Stochastic differential equation is an important way to generate scenarios.Model parameters need to be estimated accurately for getting more representative scenarios.This paper briefly introduces some usual ways for estimating parameters and offers a better method named integrated parameter estimation(IPE)in detail.Then it empirically compares the effects of ML,GMM and IPE and offers the direction for further study of parameter estimation.

<正>SaaS对CIO意味着什么SaaS能给CIO们带来低廉的前期投资、快捷方便的安装使用、与更多客户实现共享、免去维护升级的麻烦等显而易见的利益,也蕴含着不可忽视的机遇。1.低廉的前期投资

一、引言 2006年,我国保险业实现保费收入5641.5亿元,同比增长14.4%.中国保险市场是亚洲第三大保险市场,仅次于日本和韩国,是世界第十一大保险市场,同时也是全球增长速度最快的保险市场之一.目前,中国共有98家保险公司,其中57家为中资企业,其他是外资或合资企业.差不多一半的公司是在过去五年内成立的.中国保险市场逐步形成了从最初个别保险企业垄断市场到以数家大的保险企业为主导、多家小保险企业参与、新保险企业不断加入的保险市场竞争的新格局.

本文阐述了国内外行为金融的主要理论及其最新发展,比较分析了传统金融与行为金融的区别;基于行为金融分析了证券投资者行为特征、行为偏差并介绍行为金融学在我国证券市场中的应用,为我国投资者提出一些有针对性的投资策略、建议。

China has become the largest foreign exchange reserve country worldwide by taking the place of Japan.Chinese foreign exchange reserve growth has been maintaining high speed these years on account of the balance of payments disequilibria,the existing RMB exchange rate regime and RMB upvalue expectation.The excessive foreign exchange reserve implies huge cost and risk.The rapidly-expanding size brings a series of negative influence to China's economy.The paper analyzes the main reasons for Chinese excessive foreign exchange reserve,its state and features and studies the large risk caused by foreign reserve's excessively growth and monadic foreign exchange structure and finally gives some advices on how to effectively improve on such situation.

目前,我国权证市场投机气氛浓、价格波动大、市场风险高,呈现出很强的非理性特征。本文以招行认股权证为研究对象,运用B—S模型和数值法时其进行实证定价,并对二者之间的差距进行了探究。研究结论以期为广大投资者提供正确的投资对策和建议,为进一步推出其他金融衍生品创造好的环境,促进我国资本市场朝更加理性方向发展。

Nanocrystalline 2J4 alloy was fabricated by equal-channel angular pressing (ECAP). Microstructural evolution at different passes of ECAP and the effect of angle (φ) on the ECAP were researched. The results reveal that α phase slowly turns to γ phase and follows the formation of dislocation cells in the 2J4 alloy with increasing severe plastic deformation. At last, it becomes reasonably finer bands of subgrains. The results with intersect at angle (φ) of 90° are better than that at angle (φ) of 120°. After three passes of ECAP, at angle φ of 90°, nanocrystalline microstructure can be obtained. The grain size is reduced from 30μm in the initial state to 400nm.

如果企业在推进ERP的过程中,同时接受数据化管理的理念和方法,并且自觉运用6σ管理法,必将取得更为显著的成绩。