虚拟企业盟主动态管理过程中信息活动和信息流分析

本文研究虚拟企业中盟主的动态管理过程中的信息活动．运用Mowshowitz过程原理构建了虚拟企业盟主动态管理过程模型，详尽分析了盟主动态管理中的信息活动的特征和过程模型各阶段内的信息流．     

Nonlinear dynamic buckling of stiffened plates under in-plane impact load

INTRODUCTION Dynamic buckling of structures under impactloading has become a research hotspot and hasreceived increasing attention in the last decade fromdesigners of modern engineering structures. Mostpast investigations focused on simple structuressuch as columns, plates and cylindrical shells; pa-pers dealing with stiffened plate structures withwide application in engineering are limited. Zizicas (1952) investigated the dynamic buckl-ing of thin elastic plates. A theoretical solution f…     

试谈C++的多态性和虚函数

本文分析了C++中的两种多态性:编译时的多态性和运行时的多态性,通过函数重载和虚函数对其进行了探讨,指出了虚函数是实现动态联编的关键。     

带钢热连轧机液压AGC变刚度分析

文章论证和分析了本钢引进的德国AEG公司厚度控制模型算法与我国自行研制的动态设定型变刚度理论之间的关系,从而证明了动态设定型变刚度原理用于本钢热连轧厂的液压压下系统是可行的,并实现了变刚度控制。     

Study on dynamic response of embedded long span corrugated steel culverts using scaled model shaking table tests and numerical analyses

INTRODUCTION On Jan. 17, 1995, the Hyogoken-nanbu earth-quake in Kobe, Japan, caused great destructive and damage to underground structures, such as subway structures, mountain tunnels, multipurpose under-ground ducts and other underground structures, which had previously been considered to be resistant to earthquake effects (JSCE, 1996; ECRHAED, 1998). This earthquake revealed that a number of critical issues should be added in the seismic design and seismic strengthening of undergr…     

情感取向:和谐社会的一个重要特征

情感与社会因素相联系，具有社会性和历史性的特征，构建社会主义和谐社会，离不开对情感取向的培养与引导，应正确理解情感在构建和谐社会中的动力作用，同时也要看到情感也是和谐社会的一个价值尺度。     

Performance evaluation of compulsory education system in Taiwan: A modified dynamic network data envelopment analysis approach

The purpose of this study is to examine changes in the efficiency of Taiwan's compulsory education system between 2011 and 2020, identify the priority school sub-system for improving the system, and determine the input/output inefficiencies responsible for the sub-system inefficiencies. To achieve these objectives, a modified dynamic network data envelopment analysis model is used to assess the efficiency of the compulsory education systems and their internal primary and middle school sub-systems regulated by local governments. The findings indicate that both primary and middle school efficiency are crucial for evaluating the compulsory education system efficiency, and teacher and staff excesses in most local government's compulsory education systems are the primary sources of inefficiency. Therefore, the prompt adjustment of teacher and staff allocation based on student numbers is the primary approach to enhancing system efficiency.     

复合材料叠层圆柱壳的非线性动力稳定性分析

本文用汉密尔顿原理导出了复合材料叠层圆柱壳的非线性动力稳定性的控制微分方程。在基本方程中包括了非线性大挠度、圆柱壳的初始几何缺陷,以及动力载荷的惯性力等因素的影响。本文的目的是分析复合材料圆柱壳的参数共振和确定壳体结构动力屈曲时的稳定性区域和不稳定性区域,作为求解的例题,本文对三种复合材料圆柱壳进行了数例计算:即 T300—5208石墨-环氧壳体,ARALL 叠层铝合金壳体,和 E-玻璃-环氧壳体,结果表明它们具有相当不同的动力稳定性能.由本文所得出的计算结果和分析结论对于考虑和设计复合材料圆柱壳的动力稳定性具有重要的实用意义.     

CCPA: Component-based communication protocol architecture for embedded systems

For increased and various communication requirements of modem applications on embedded systems, general purpose protocol stacks and protocol models are not efficient because they are fixed to execute in the static mode. We present the Component-Based Communication Protocol Architecture (CCPA) to make communication dynamic and configurable. It can develop, test and store the customized components for flexible reuse. The protocols are implemented by component assembly and support by configurable environments. This leads to smaller memory, more flexibility, more reconfiguration ability, better concurrency, and multiple data channel support.     

Dynamic properties of composite cemented clay

In this work,the dynamic properties of composite cemented clay under a wide range of strains were studied considering the effect of different mixing ratio and the change of confining pressures through dynamic triaxial test. A simple and practical method to estimate the dynamic elastic modulus and damping ratio is proposed in this paper and a related empirical normalized formula is also presented. The results provide useful guidelines for preliminary estimation of cement requirements to improve the dynamic properties of clays.