How to price the unbundled local loop in the transition from copper to fiber access networks?

In many countries worldwide access networks are in the transition from copper to fiber access. During the transition phase copper and fiber networks are operated in parallel. All regulators facing this situation of technological change have to decide how to price unbundled access to the copper loop in this transition phase. Should they keep the usual forward looking long-run incremental cost standard charge, or should they move to some different approach? The authors propose to price copper access based on the modern equivalent asset (MEA) of fiber access. Since fiber access is superior to copper access, the cost of fiber access (as a basis for pricing copper access) should, however, be corrected by the performance delta between copper and fiber access.     

Knowledge organisation in R&D alliances: its impact on product innovation

Based on the knowledge-based view of the firm, this paper analyses how alternative configurations of technological relatedness in interfirm research and development (R&D) alliances influence specific types of product innovation. A longitudinal study of pharmaceutical firms provides support for the argument that complementary alliances contribute to the development of both radical and incremental innovation. Collaborating with partners that have similar technologies only enhances incremental innovation, although its impact is curvilinear. These evidences highlight the importance of designing a suitable portfolio of R&D alliances in order to develop different innovative competences.     

浅谈增量型编码器在侧式刮板取料机中的应用

编码器是电感元件,具有精度高、测量准确、抗干扰能力强等特点。侧式刮板取料机中应用了编码器,使得取料量恒定这一工艺要求得到完美实现。     

环境不确定性对渐进式创新和突破式创新的影响研究

文章探讨了环境不确定的三个维度(需求不确定性、技术不确定性和竞争强度),分别对企业渐进式创新和突破式创新的影响。并通过对404家中国企业的实证研究发现:环境不确定性的三个维度对渐进式创新和突破式创新影响不尽相同,其中需求不确定性对渐进式创新和突破式创新的影响不显著;技术不确定性与渐进式创新负相关,与突破式创新正相关;竞争强度对渐进式创新的影响不显著,与突破式创新负相关。     

基于PLC的磨矿分级自动控制系统设计

针对磨矿分级过程人工操作劳动强度大,分级精度较低等特点,文章设计了基于S7-200PLC的磨矿分级自动控制系统,主要包括控制系统的硬件设计和软件设计,并设计了上位机监控界面,实现磨矿分级的自动控制和远程控制。实际运行结果表明,该系统调节速度快、稳定可靠,实现了管控一体化,提高了磨矿分级的产品质量和企业的经济效益。     

螺旋焊缝轨迹跟踪控制算法的分析与研究

分析和研究了超声波螺旋焊缝自动检测的轨迹跟踪控制算法。在对经典PID控制采用参数自整定算法、对模糊控制采用自调整因子算法的基础上,提出了一种新型复合控制算法。该算法结合了比例控制、模糊控制及PID控制,仿真结果表明,其具有响应速度快、超调量小、无静差等优点,提高了轨迹跟踪的实时性及精度。     

浅析绿色建筑的经济性评价

在可持续发展思想的指导下,绿色建筑顺其自然成为建筑业的发展未来。文章将着手构建绿色建筑经济效益评价模型,为促进绿色建筑的发展奠定基础。详细剖析绿色技术的各项增量成本、增量效益,更加准确的评价绿色建筑的经济性。     

金融危机影响下清洁发展机制及其相关产业发展

本文以福建东乌礁湾30MW风力发电项目、中国龙源电力集团公司为案例,探讨了我国风电企业在金融危机背景下的发展问题,并展望了清洁发展机制和新能源等相关产业在我国的发展前景,为进一步发展我国的清洁发展机制提出了若干策略建议。     

Trend forecasting for stability in supply chains

This paper revisits the use of trend forecasting to determine ordering policy in supply chains by viewing it as a part of the control process for making the supply responsive to demand. Trend forecasting is often used to assess demand — a tracked variable in the control context, which drives supply — a tracking variable. Used in this way, it is often observed to increase instability creating the so-called bullwhip effect. Trend is used on the other hand with reliability to increase stability in controller control, but with the difference that a trend of a tracking variable is used to drive correction. While both processes involve use of trend to determine policies for achieving reliable performance, the outcomes of the former are variable while those of the later can create improvement in control with certainty. The similarities and differences between the two processes are discussed and guidelines developed for applying trend forecasting to enhance stability in supply chains.     

论区域性物流中心的建设

结合物流业的发展,对区域物流与区域经济的关系、区域性物流中心的功能,我国目前区域性物流中心建设中存在的问题及今后的发展对策进行了初步探讨。