TV信号的多路传输及带宽压缩

本文阐述了时间压缩信号及其频谱、各种差分信号的产生方法及频带压缩过程.最后对图象带宽为4.2MHz的TV系统用8.4MHz带宽传送三个TV信号的具体执行力式作了介绍.     

Strategizing through analyzing and influencing the network horizon

How does a firm keep on being valuable in a network? One requirement is that the firm has a sufficient overview of the network and its dynamics. In other words, a firm's strategy depends on the firm's overview of the network—its network horizon. How comprehensive or limited should its network horizon be? Is it necessary to know the network beyond the direct counterparts? Such issues have not received much attention. In this article, we discuss network horizons and argue that limited network horizons are both inevitable and useful. However, such myopia requires that a firm's counterparts effectively and efficiently mediate between the firm and the rest of the network. Based on a case study, we introduce and discuss three mediating functions of counterparts: a joining, a relating, and an insulating function, and we claim that in order to support a firm's strategizing, managers need to analyze and influence counterparts' mediating functions and thereby the firm's network horizon.     

建设项目全寿命期综合计划体系

建立了建设项目综合计划的工作过程和工作内容。与传统的狭义的项目计划不同，建设项目全寿命期综合计划必须以全寿命期项目目标为主导，以项目的功能建设和运行为核心．包括设计、组织策划、实施方案和实施过程计划、运行策划等，它们之间有复杂的内在联系，具有高度的系统性。     

民间金融与地方经济发展——温州融资模式的启示

由于我国现有金融体制的不足，无法满足私营中小企业和个体经济的融资需求，民间金融有其产生和存在的必然性和合理性。从温州发达的民间金融对其经济发展的作用和我国许多落后地区与温州改革前经济落后状况的雷同来看，我国现阶段应尽快建立健全民间金融制度和体系，以促进国民经济的快速发展。构建民间金融制度可分两步：首先承认民间借贷和各种会的合法地位，然后通过发展民营中小银行逐步取代它们。     

美、德农业社会化服务提供的启示

美国的农业社会化服务主要由三个部分组成：农业公共服务体系、集体农业服务体系和私人农业服务体系。公司＋农场、公司＋农户以及合作供销是美国农业社会化服务的三种形式。德国的农业社会化服务体系在于农业专业合作社组织的成功发展,尤其是健全的农村金融服务体系,由一个具有三级层次结构的分权型组织组成,通过立法和提供一些优惠政策,政府在服务体系中起了重要作用。我国农业社会化服务体系的组成和服务形式与美、德十分相似,在推动农村经济发展方面却有一定差异,美国和德国农业社会化服务的经验对中国农业社会化服务的发展具有重要启示。     

Multiple generation product life cycle predictions using a novel two-stage fuzzy piecewise regression analysis method

Product life cycle (PLC) prediction plays a crucial role in strategic planning and policy definition for high-technology products. Forecast methodologies which can predict PLCs accurately can help to achieve successful strategic decision-making, forecasting, and foresight activities in high-technology firms, research institutes, governments, and universities. Over the past few decades, even though analytic framework strategies have been proposed for production, marketing, R&D (research and development), and finance, aiming at each stage of PLCs, forecast methodologies with which to predict PLCs are few. The purpose of this research is to develop a novel forecast methodology to allow for predictions of product life time (PLT) and the annual shipment of products during the entire PLC of multiple generation products. A novel two-stage fuzzy piecewise regression analysis method is proposed in this paper. In the first stage, the product life-time of the specific generation to be analyzed will be predicted by the fuzzy piecewise regression line that is derived based upon the product life-time of earlier generations. In the second stage of the forecast methodology, the annual shipment of products of the specified generation will be predicted by deriving annual fuzzy regression lines for each generation, based upon the historical data on the earlier generations' products. An empirical study predicting the life-time and the annual shipment of the 16 Mb (Mega bit) DRAM (Dynamic Random Access Memory) PLC is illustrated to validate the analytical process. The results demonstrate that two-stage fuzzy piecewise regression analysis can predict multiple generation PLT and PLC precisely, thereby serving as a foundation for future strategic planning, policy definitions and foresights.     

简释可持续发展成本

可持续发展观要求我们对成本概念进行正确的理解，已经付出的资源代价是成本，应该付出但尚未付出、迟早要付出的资源代价也应该理解为成本，这是对可持续发展成本理解的基础。可持续发展成本主要是由自然生态成本和人文生态成本构成。重视可持续发展成本核算是优化资源环境的需要、完善国民经济核算体系的需要以及正确计算产品成本的要求。构建可持续发展成本核算体系应从自然生态成本核算体系和人文生态成本核算体系两个子系统进行构建。     

A multi-level analysis of sustainable mobility transitions: Niche development in the UK and Sweden

A wide range of intractable problems such as polluting emissions, noise, accidents, resource depletion, and inaccessibility of amenities are associated with the current transport regime. Given the slow movement towards a more sustainable mobility system, more radical, systemic innovation - a ‘transition’ - is required. Broadly speaking, this may be achieved via three routes: technological change, modal shift, and reduced travel demand. Drawing on concepts from the transitions literature (e.g., [Geels, F.W.: Technological Transitions and System Innovations: A Co-evolutionary and Socio-Technical Analysis, Edward Elgar, Cheltenham, 2005.]), we conceptualise each of these routes as a bundle of niche activities within an Area of Innovation, deviating to differing degrees from the current mobility ‘regime’. We present empirical evidence and indications of ongoing development of niches in these three areas within the UK and Sweden, and explore processes of co-evolution, divergence and tension within and between niches. Findings indicate recent market penetration of novel transport technologies, more advanced than modal shift or demand management activities; however, different transport technologies are more successful in each country. We also identify examples of a close relationship between development of radical vehicle/fuel technologies and provision of mobility services; and information technology as a driver in all three areas of innovation. We conclude that future innovation in transport depends on diversity, hybridisation, and co-evolution of niches. Finally, policy implications are discussed.     

A theory of innovation for process-based innovations such as nanotechnology

Many see Nanotechnology as the technology that will underlie the next Schumpeterian wave creating new opportunities for wealth and job creation. Further it is a process based or materials technology. Yet all currently used models of innovation are based on assembled products or service products and these simply do not recognize the differences in materials products nor the “enabling” nature of Nanotechnologies. If nanotechnology is poised to become the economic engine of this millennium and if current models of innovation, which are utilized, by policy makers and firm based strategist alike are based on technology product paradigms that are dissimilar to the realities of nanotechnology and other process-based technologies then there is cause for concern.Here the authors provide a model and supporting cases demonstrating a new process or materials based innovation model that is based on the tight coupling between product and process innovation of not only Nanotechnology-based products but other process-based products. This is an important finding, because it identifies and remedies a gap in the literature associated with earlier process and product innovation models. For process-based products like materials, food, chemicals and nanotechnologies any change to the manufacturing processes results in significant changes in end product features. The implications of this model to practice are considered.     

我国A股、B股市场并轨的前景探析

B股市场的前途问题是一个困扰市场参与者的主要问题,而前途的不明朗源于B股市场定位的困惑和功能失调。筹资功能方面,1991～2004年12月B股市场通过股票发行总计筹资50.03亿美元,通过配股筹资3.27亿美元,而同期A股市场对应的数据是5695.7亿元和2276.74亿元,而且最近3年B股市场的