MIL—STD—1553B测试问题的探讨

本文在讨论1553B产品的测试原则及阶段划分的基础上,简要地介绍了该类产品验证测试的基本项目及要求,突出强调了该测试问题的迫切性及复杂性。     

C波段高功率微带铁氧体收一发双工器的研究

本文主要叙述了C波段微带铁氧体双工器的特点,分析了微带铁氧体环行器在高峰值功率作用下的损耗机理与设计方法。已研制的微带双工器,成功地应用于航天电子设备。     

一种新颖的相位检测方案

本文介绍一种以正交鉴相技术为基础,MCS—51单片微机为核心的相位检测方案。     

宽带全固态115W脉冲功率放大器

本文叙述了宽带全固态115w脉冲功率放大器的设计和研究结果。在960～1215MHz频率范围内该放大器的增益大于43dB,功率波动小于1.5dB,输出功率为115w。本放大器可用于通信、导航、雷达等设备中作功率发射用。     

当代的军用背负电台

本文介绍国外当代军用背负式电台的发展情况及其存在的问题。微机在背负式电台中的应用状况。     

Indivisibilities,lotteries, and sunspot equilibria

Summary We analyze economies with indivisible commodities. There are two reasons for doing so. First, we extend and provide some new insights into sunspot equilibrium theory. Finite competitive economies with perfect markets and convex consumption sets do not allow sunspot equilibria; these same economies with nonconvex consumption sets do, and they have several properties that can never arise in convex environments. Second, we provide a reinterpretation of the employment lotteries used in contract theory and in macroeconomic models with indivisible labor. We show how socially optimal employment lotteries can be decentralized as competitive equilibria without lotteries once sunspots are introduced.We thank Kenneth Arrow, Aditya Goenka, Ed Green, Jeremy Greenwood, Walter Heller, Steve Matthews, Herve Moulin, Roger Meyerson, Jim Peck, Patrick Kehoe, Ramon Marimon, Ed Prescott, Richard Rogerson, Nancy Stokey and Raghu Sundaram for their comments. We also thank participants in seminars at Northwestern, Yale, USC, Cornell, Barcelona, Madrid, Santander, and the Canadian Economics Association annual meetings in Victoria. We are grateful to the National Science Foundation (through grants SES-8606944 and SES-8821225), the Center for Analytic Economics, the Thorne Fund, and the University of Pennsylvania Research Foundation for research support. The views expressed here are those of the authors, and not necessarily those of the Federal Reserve System or the Federal Reserve Bank of Minneapolis.     

SLUM DWELLERS' HOUSEHOLD CONSUMPTION PATTERN AND ITS IMPLICATION FOR COST RECOVERY IN SLUM UPGRADING: Evidence from Dhaka, Bangladesh

Strong emphasis has recently been placed on recovery of improvement costs from slum dwellers for sustainable development of low-income urban settlements. Furthermore, socio-economic stratification of slum dwellers is perceived to influence their consumption and investment patterns in the city. Against this background, populations in six slums in Dhaka, stratified into house owners and renters, were studied. Results show that renters have stronger ties with their rural origin where they are likely to return and remit a significant portion of their income, leaving a limited amount for consumption and investment in the city. In contrast, owners have stronger attachment to the city, remit negligible amounts to their village of origin and pay more attention to city consumption and investment. Consequently, any cost recovery approach to slum upgrading implies heavy reliance on owners. But renters can also be expected to share the cost, to some limited extent, in the form of property tax or community services charges. The key point here is the concurrence of renters and owners on the sharing of costs and benefits.     

Reply on comment to “small firms and the merger mania”

Research on performance differences between small and large firms is booming. It emerges relatively separated from the mainstream Industrial Organization Literature. Inspired by Levy's comment on an earlier paper we try to bridge the gap between the two areas. Especially we screen non cooperative game theoretical models for predictions on performance differences. Most of them forecast higher profits for larger firms, but there exist also some models which predict the opposite for very specific circumstances.