锁相同步技术在不间断电源中应用的几个问题

本文研究了三种相位反馈控制方案,讨论了它们应用的条件和应注意的问题。实验结果对进一步改进UPS电源的性能有实际价值。     

Leading the democratic enterprise

Over the last decade the forces of globalisation, competition and ever more demanding customers have made many companies flatter, less hierarchical, more fluid and more virtual. Lynda Gratton believes that the breakdown of hierarchies and the new approaches within such companies as BT, BP Amoco, Goldman Sachs, McKinsey and Sony provide us with fertile ground on which to create a more democratic way of working. This requires leaders to take on radically new roles.     

The optimal intertemporal decision on industrial production and harvesting a renewable natural resource

This paper grew out of a research project financially supported by the Deutsche Forschungsgemeinschaft (DFG) in its program Economics of Natural Resources. This support is gratefully acknowledged. I also thank H. Wacker for helpful discussions. I also thank two anonymous referees for valuable comments on an earlier draft.     

The market as a commons: Is catching customers like catching fish?

Summary This note is a critique of an article by P. Copes published in the February 1984 issue ofDe Economist. Copes argues that an open access market must be regarded as a common property resource. By analogy to the economics of the fishery, he derives the proposition that free access to any market results in excess capacity because competitive entry dissipates what he calls the market rent. Copes claims that his results hold for the limiting case of perfect competition. Our critique explains why the analogy between a perfectly competitive market and a open access fishery is invalid.     

Market orientation: Review, refinement, and roadmap

Over the past ten years, significant progress has been made in the market orientation area. Scholarly attention has focused on the definition, measurement, and impact of a market orientation. Attention has also focused on organizational drivers of market orientation and its enhancement. Despite progress, several research challenges remain and rich opportunities exist for further work in the area. This paper critically reviews the state-of-the-art and offers a roadmap for future work in the area. The review primarily focuses on (1) the meaning of market orientation, (2) its relationship with several emerging topics/themes in the literature (e.g., market information processing, organizational learning, knowledge use, industry foresight and driving markets), (3) the quality of market-oriented behaviors, (4) impact of market orientation, and (5) issues in enhancing market orientation. We conclude with a conceptual synthesis and methodological suggestions.     

The Current Status of Women in US Department Store Retailing: 2004

This study replicates the work of Gable, Fiorito and Topol () that examined the status of women in managerial ranks of department store organizations. Women now constitute 67% of all lower-level management positions, approximately 45% of middle-level positions, and 24% of those positions at upper levels. While some progress has been made since the 1994 study, females are not close to parity with males at the highest level positions. Further, a comparison was made of the gender composition of the boards of directors of the 25 largest industrial organizations (in annual sales volume) with that of the 25 department store organizations.