分布式电力监控系统中安全问题的研究与实现

随着电力监控系统由集中的管理方式转变为采用分布式的网络管理，整个分布式电力监控网络的安全问题显得日益重要。本文在分析电力监控系统特点的基础上为监控网络提供了一个完整的安全服务，该服务包括对安全认证中心、各个分布式监控站点和整个网络传输过程中安全问题的考虑。     

Institutional environment and firms' sources of financial capital in Central and Eastern Europe

The external business environment is a major determinant of which sources firms select to obtain financial capital. We examine how the regulatory, political, and financial dimensions of the institutional environment influence the extent to which firms rely on informal sources of financial capital. The analyses of data from 2869 firms in twenty-six transition economies in Central and Eastern Europe (CEE) indicate that ineffective regulatory system, underdeveloped financial system, and government corruption are strong determinants of firms' reliance on informal channels for financial capital. We also find that smaller firms are more vulnerable when the local financial system is underdeveloped and the regulatory institutions are less effective in these transition economies. A subgroup analysis of firms' forms of establishment shows that private firms are sensitive to the level of development of the local financial system and state-owned enterprises are particularly sensitive to the degree of corruption.     

一种多输入队ATM交换结构

本文提出一种多输入排队ＡＴＭ交换结构和相应的输出冲突解决方法，它可以使交换网络避免输入队固有的排头阻塞，从而使网络在不增加运行速率的情况下，可达到输出排队的性能。文中介绍了冲突解决办法及其实现技术，说明它可方便地在高速网中实现。     

从美国专利看跨国公司研究开发国际网络化的本质

本文对取得美国专利权的19家电子行业的跨国公司研究开发的国际化程度和趋势进行了实证分析.论文确认了19家跨国公司研究开发国际网络化进程中的差异,同时对日本电子行业的跨国公司在基础研究层面的研究开发活动进行了分析.结论是:在"市场竞争的全球化"和"向IT时代转型"这样的外部竞争环境中,为了开发适合全球化市场的新产品,跨国公司必须要在企业内建立一个在世界范围内进行优秀研究开发人才最佳配置的全球网络体系.     

台湾农产品大陆营销存在的问题与对策

台湾农产品销往大陆,是两岸同胞实现双赢的贸易。目前,受到各方面因素的制约,发展较为缓慢,使其供求信息难以顺畅地传递,营销成本过高,难以满足多层次的消费需求。为了扩大台湾农产品在大陆的营销,必须建立台湾农产品经销制度,定位大陆消费市场,拓宽畅通销售渠道,使供给与需求更加趋于完全均衡。     

网络平台上烟草行业的动态预算管理模式研究

本文对网络环境下烟草行业如何实现动态预算管理进行了研究,对烟草行业当前预算管理模式面临的问题,以及烟草行业动态预算管理的基本要求、流程、控制过程进行了探析。     

“四阶段法”中运量分配的路网断面剖切技术研究

针对"四阶段法"的运量分配过程中存在对路网动态变化的适应性反应迟钝、相关径路双向交流产生的大量回流量重复计算、通道交流量缺乏总量控制调节关键环节等问题,提出采用路网断面动态剖切技术,给出具体操作步骤和基本算法,并与传统运量分配方法进行优劣分析。通过宝中线运量预测的实例计算分析,说明断面剖切技术的实际应用。     

人工神经网络及其在盲信号处理中的应用

文章讲述了人工神经网络基本知识、特点及几种典型神经网络,介绍了盲信号处理的基本概念,最后进一步指出了人工神经网络在盲信号处理中的优势。     

区域耕地数量变化预测方法的对比研究

研究目的:对区域耕地数量变化预测方法进行对比分析,科学合理确定区域耕地数量。研究方法:通过Pearson相关分析法筛选影响耕地变化的关键因子,利用改进的BP神经网络算法、灰色模型和多元线性回归模型法对费县耕地数量变化进行预测。研究结果:改进的BP神经网络算法相对传统的灰色模型和多元线性回归模型等预测方法具备较高的预测精度。研究结论:改进的BP神经网络算法是进行耕地数量变化预测的较好方法,具有实际指导意义,其预测结果可以为当地相关部门合理地确定耕地保有量、推进耕地保护提供科学依据。     

The transition from products to solutions: External business model fit and dynamics

This article provides empirical evidence and contributes to theory building concerning business model fit and dynamics in the area of solutions business. Business models are seen in this context as going beyond considerations such as offerings and internal processes or even relationships, and as including network and market considerations. Indeed the paper highlights the fact that a business model is not firm-focused, nor dyad-focused, but rather network-, and even market-focused, demonstrating that a business model is not static, but dynamic. Manufacturer and customer continuously shift form and content of their respective business models to adapt both to the needs of the counterpart and to market context. A qualitative case study approach is adopted, with subsequent content analysis. The case study relates to the aerospace industry with focus on a complex engineering firm, one of the largest aircraft manufacturers in the world, its customer — a national airline — and their network partners of various kinds. The data were collected through multiple face-to-face interviews with managers in both companies, as a part and parcel of a network of actors that influences and is influenced by the supplier–buyer relationship. Relationships over time between these firms and network partners are described, highlighting the interplay of products and services related to the provision of solutions. Findings highlight the dynamic nature of business models over the relationship lifecycle between supplier and customer in a complex engineering environment, and the need for reciprocal adjustment of models.