全球移动蜂窝通信的革命

近年来，移动蜂窝通信的发展速度可谓骇世惊人。１９９０年，移动用户有１１００万，到１９９８年底达到了３亿多个。据预测，在今后１０年中移动蜂窝用户数将超过固定电话。本文研究了全球移动蜂窝通信的发展状况，就技术革命、服务提供、管制、接入、价格以及发展前途等方面进行了详细的论述。     

电信市场开放后政府的管制倾向

综合来讲，世界各国对电信行业的管理大致在三个层次上进行：最高政府决策管理层、准政府管理层及民间层。面对电信网络设备的管理主要有强制性管理和非强制性管理两种方式。本文在最后指出了国外电信行业管理的趋势。     

The variance equity measure in locational decision theory

Classical location theories and models were initially developed for the private sector, so that the related operational research literature has emphasized performance measures of efficiency and effectiveness. For public sector applications, measures of equity become important, yet such measures have received little formal treatment. This paper suggests a locational equity measure, the variance measure, and investigates its properties for tree networks. A fast algorithm (O(M)) to locate the minimum variance point on a tree network is developed, and some numerical results illustrate the variance optimal location.This work is dedicated to the memory of Professor Jonathan Halpern     

Computing the cores of strategic games with punishment–dominance relations

In this paper, we discuss the computational complexity of the strategic cores of a class of n-person games defined by Masuzawa (Int J Game Theory 32:479–483, 2003), which includes economic situations with monotone externality. We propose an algorithm for finding an α-core strategy of any game in this class which, counting the evaluation of a payoff for a strategy profile as one step, terminates after O(n ³· M) operations, where M is the maximum size of a strategy set of any of the n players. The idea underlying this method is based on the property of reduced games. This paper is based on a part of the doctoral dissertation of the author. The author thanks Mikio Nakayama, Masashi Umezawa, William Thomson, an associate editor, and the anonymous referee for their helpful comments, suggestions, and advice. Thanks are also due to Yukihiko Funaki for a comment that led the author to this subject. The author is responsible for errors and inadvertencies.     

面向公共安全监测的物联网技术与应用探讨

物联网的发展如火如荼,作为新兴高技术产业的重要组成部分,物联网技术广泛应用于各行各业。介绍物联网在公共安全领域的应用,对现阶段面向公共安全监测的物联网的网络架构、关键技术、应用现状以及发展中的若干问题进行了分析,同时对面向公共安全监测的物联网的发展前景进行了探讨,着重探讨了技术、应用发展方向。     

The impact of facilities and service-based competition on internet services provision in the Canadian broadband market

A variety of studies have focused on the effect of competition in broadband markets on increasing broadband penetration rates. Few studies however have focused on the extent to which competition also results in innovation in the marketplace, as demonstrated by increased broadband speeds, and other improvements that provide value to broadband users. This paper considers the effectiveness of market competition as a means of encouraging broadband providers to offer innovative services that meet citizens’ increasing needs for affordable high quality and high speed broadband connectivity. The study focuses on the provision of broadband services in Canada, a country where consumers were early adopters of broadband and where the policy environment has encouraged competition in the broadband market from its inception. Drawing on data from the OECD and the Canadian Radio-television and Telecommunications Commission (CRTC), the paper demonstrates that Canada’s regulatory regime does not appear to be sufficient to enable a competitive marketplace that results in the provision of innovative broadband services.     

Nanomedicine-Enabled Chemical Regulation of Reactive X Species for Versatile Disease Treatments

Reactive X species (RXS), encompassing elements such as O, N, C, S, Se, Cl, Br, I, and H, play vital roles in cell biology and physiological function, impacting cellular signal transduction, metabolic regulation, and disease processes. The redox unbalance of RXS is firmly implicated in an assortment of physiological and pathological disorders, including cancer, diabetes, cardiovascular disease, and neurodegenerative diseases. However, the intricate nature and multifactorial dependence of RXS pose challenges in comprehending and precisely modulating their biological behavior. Nanomaterials with distinct characteristics and biofunctions offer promising avenues for generating or scavenging RXS to maintain redox homeostasis and advance disease therapy. This minireview provides a tutorial summary of the relevant chemistry and specific mechanisms governing different RXS, focusing on cellular metabolic regulation, stress responses, and the role of nanomedicine in RXS generation and elimination. The challenges associated with chemically regulating RXS for diverse disease treatments are further discussed along with the future prospects, aiming to facilitate the clinical translation of RXS-based nanomedicine and open new avenues for improved therapeutic interventions.     

Public policy structuring incorporating reciprocal expectation analysis

This paper proposes a method of structuring public policy by incorporating reciprocal expectation analysis. The proposed method is characterized by three components: identification of the problem structure perceived by stakeholders using cognitive maps, policy structuring analysis with a value–driver matrix and a reciprocal expectation matrix, and feasibility analysis of agreements among the stakeholders. The three types of relationship among stakeholders are derived from the feasibility analysis, which are “Dosho-imu”, “Isho-imu”, and “Domu”. Three tests of feasibility to reach the agreement are then proposed: “information-sharing test”, “bargaining test”, and “reframing test”. A case study is presented, applying the method to strategic transportation planning in the Kanto region of Japan. Finally, the potential functions of the proposed method in practice are discussed.     

地铁中的移动通信系统

提出了地铁专用移动通信系统的功能要求；介绍和分析了一个满足系统功能要求的集群方案；另外还简单介绍了地铁公用移动通信引入系统。     

基于网络在线系统理念的公共英语教学探究

随着计算机网络技术的发展,公共英语教学也在逐渐引进和应用网络技术,以网络在线系统理念为指导,设计各种适合公共英语教学的网络在线教学与交流平台。本文在研究中分析了ASP技术,结合SQL server2005数据库构建的B/S模式在线系统,以及Web服务与资源为学生提供的自主学习与交流环境。