世纪之交的高师物理实验教学初探

本文从大、中学物理实验教学的现状出发，对大学物理实验教学在培养适应多样化需要的跨世纪人才中，应怎样优化和改革各教学环节作了初步探索。     

以就业为导向的会计本科教育的培养目标研究——基于国内部分高校的问卷调查

文章从会计职业技能和全国14所高校的调查数据两方面对会计本科教育的培养目标进行分析,提出了以就业为导向的培养目标:培养具有良好的会计职业道德、具有扎实的经济管理理论基础、具备较强的会计专业技能、能适应社会经济发展需要、胜任会计工作的应用复合型人才.     

无补偿板的迈克耳孙干涉仪

本文研究了无补偿板情况下迈克耳孙干涉仪的条纹特点;并对条纹特点进行了充分的解释;指出了补偿板的作用不仅在于使不同波长的光得到相同的补偿,而且也使不同入射方向的光得到了相同的补偿。     

Myopic Analysis for Multi‐Echelon Inventory Systems with Batch Ordering and Nonstationary/Time‐Correlated Demands

We provide an exact myopic analysis for an N‐stage serial inventory system with batch ordering, linear ordering costs, and nonstationary demands under a finite planning horizon. We characterize the optimality conditions of the myopic nested batching newsvendor (NBN) policy and the myopic independent batching newsvendor (IBN) policy, which is a single‐stage approximation. We show that echelon reorder levels under the NBN policy are upper bounds of the counterparts under both the optimal policy and the IBN policy. In particular, we find that the IBN policy has bounded deviations from the optimal policy. We further extend our results to systems with martingale model of forecast evolution (MMFE) and advance demand information. Moreover, we provide a recursive computing procedure and optimality conditions for both heuristics which dramatically reduces computational complexity. We also find that the NBN problem under the MMFE faced by one stage has one more dimension for the forecast demand than the one faced by its downstream stage and that the NBN policy is optimal for systems with advance demand information and stationary problem data. Numerical studies demonstrate that the IBN policy outperforms on average the NBN policy over all tested instances when their optimality conditions are violated.     

On moments and cumulants of the D compound Poisson distribution

This note provides more results on moments and cumulants of the D compound Poisson distribution through the properties of the multivariate generalized power series distribution.     

一种适用于无线ATM通信的差错控制方案

研究了无线ＡＴＭ通信的差错控制方案，提出了应根据多媒体业务类型、速率等参数，以及移动环境等，自适应地选择合适的差错控制技术和参数的思想。文中提出的差错控制方案主要包括ＦＥＣ（可变深度的交织、卷织码、ＢＣＨ码）和限时／非限时ＳＡＲＱ等技术，计算机仿真结果表明了所提方案的有效性。     

英汉语篇文化对比分析三例

外语学习者在正确使用目的语语法规则的同时，还必须具备目的语的语用能力。从跨文化交际的角度来讲，习得目的语的语用规范比习得目的语语言形式规范更重要、更困难。本文试图以语篇分析和语用学的理论为依据，对三类语篇实例进行文化对比分析，从而验证“过渡语篇”的语用失误。     

超塑成形技术在注塑模制造上的应用

利用金属的超塑性成形技术制造用一般常规加工方法难以加工的复杂盲孔型腔，具有工艺简单、制模周期短、成本低，轮廓清晰、表面光洁等优点。     

Generalized model for IGC growth in aluminum alloys

A generalized brick wall model is developed to describe intergranular corrosion in Equi-axed AA7178-T6 and Wingskin AA7178-T6 aluminum alloys. The intergranular corrosion rate is highly related to grain size and shape. High strength aluminum alloys are often elongated and anisotropic, with the fastest nominal IGC growth rate in the longitudinal direction (L) or long transverse direction (T) and the slowest in the short transverse direction (S). We propose a three-way intersection model and use it to simulate the corrosion kinetics for each direction. With a proper combination of model parameters, the generalized IGC model provides a good fit to experimental data developed by the foil penetration technique.     

企业科技创新管理体制研究

当今世界,人类已开始进入知识(智力)资源的占有、配置、生产、分配和使用为重要因素的崭新时期,科技进步成为经济发展的第一推动力,而科技创新是科技进步的决定性因素,是一个国家、一个企业实力竞争的关键,也是企业发展的永恒主题.现代企业是知识经济的挑战者和主力军,必须建立与企业发展要求相适应的现代企业的科技创新体制,因为科技创新体制是企业在市场中处于竞争优势的关键环节所在.