行政长官及其权力运作—─香港政制系列研究之一

“九七”以后的香港政制架构中，行政长官居特殊地位，直接关系到“一国两制”方针和香港基本法的贯彻实施。本文主要是从香港特别行政区行政长官的法律地位、任职资格、产生办法、权力运作等问题的分析入手，阐明“九七”前后从港督到行政长官的转变给未来香港政制发展带来的影响，以及基本法有关规定的正确性。     

论现代语言学系统思想的历史渊源

系统观作为认识客观世界的一种视角,具有认识论和方法论的普遍意义.本文拟就系统思想形成的历史沿革,对语言学系统思想的历史渊源作一些探讨.文章最后的结论是,语言学系统思想的发展与系统思想本身的发展紧密相关,用系统的思想考察复杂的语言现象既必要又合理.     

Understanding youth transition system in Poland through the analysis of partnerships between vocational upper secondary schools and industry

This paper examines the current youth transition system in Poland focusing on the role of industry partnerships with vocational upper secondary schools. On the example of the aviation cluster in the south-eastern Poland, this paper assesses the strong industry-led partnership established in 2007 with local schools and authorities in delivery of aviation-specific programmes, and its impact of local youth transitions to labour market. In contrast to Poland's national trend towards weak cooperation between industry and the vocational education sector, three major dynamics regarding the aviation cluster's influence on vocational education are observable. The region benefits from: strong leadership from local industry in influencing the supply of particular skills by local vocational education and training (VET) schools and universities; a high level of willingness of local government authorities at the mayor's and municipality's offices to support the aviation cluster's influence on VET; and a free-market model of student choice influencing the practice of local VET schools and training centres. Such cooperation is valuable for businesses and local institutes of education. However, these processes affect the equal chances of successful school-to-work transitions for graduates stratified in different educational pathways, and successful transitions are still constrained by the structure of Poland's system, which is increasingly assuming ‘education logic’.     

Food Sovereignty in Everyday Life: Toward a People-centered Approach to Food Systems

Abstract

This paper proposes a theoretical approach that de-centers ‘food’ in food-related research, placing social life as the point of departure for a critical analysis of food systems and the search for alternatives. Using a relational conception of food as a nexus of multiple, intersecting social-historical processes, a ‘people-centered’ approach illuminates the social elements that can inform resonant and locally inflected strategies for food sovereignty, particularly for urban communities in the USA. Building on theoretical concepts of primitive accumulation, articulation, and everyday life, as well as empirical work with the Chicago-based Healthy Food Hub, this paper explores the relationship between everyday food practices and historical processes of proletarianization as they are produced, reproduced, and contested at multiple conjunctures. In these spaces of contestation, the capacity for diverse communities to re-articulate social relations through everyday food practices could provide a potentially powerful pathway not just to food sovereignty, but an alternative to life under capitalism.     

Adaptive Tactical Pricing in Multi‐Agent Supply Chain Markets Using Economic Regimes

In today's complex and dynamic supply chain markets, information systems are essential for effective supply chain management. Complex decision making processes on strategic, tactical, and operational levels require substantial timely support in order to contribute to organizations' agility. Consequently, there is a need for sophisticated dynamic product pricing mechanisms that can adapt quickly to changing market conditions and competitors' strategies. We propose a two‐layered machine learning approach to compute tactical pricing decisions in real time. The first layer estimates prevailing economic conditions—economic regimes—identifying and predicting current and future market conditions. In the second layer, we train a neural network for each regime to estimate price distributions in real time using available information. The neural networks compute offer acceptance probabilities from a tactical perspective to meet desired sales quotas. We validate our approach in the trading agent competition for supply chain management. When competing against the world's leading agents, the performance of our system significantly improves compared to using only economic regimes to predict prices. Profits increase significantly even though the prices and sales volume do not change significantly. Instead, tactical pricing results in a more efficient sales strategy by reducing both finished goods and components inventory costs.     

Improving the bridge structure by using linear failure rate distribution

In this paper, a system of five components is studied; one of these components is a bridge network component. Each of these components has a non-constant failure rate. The system components have linear failure rate lifetime distribution. The given system is improved by using three methods: reduction, warm standby with perfect switch and warm standby with imperfect switch. The reliability equivalence factors of the bridge structure system are obtained. The γ-fractiles are obtained to compare the original system with these improved systems. Finally, we present numerical results to show the difference between these methods.     

Optimal Software Free Trial Strategy: Limited Version,Time‐locked,or Hybrid?

Limited version, time‐locked, and hybrid are three software free trial strategies employed by software firms to exploit increased installed base and/or reduction of consumers' uncertainty about software quality. We develop an analytical model to examine these three software free trial strategies. We find that the hybrid strategy weakly dominates the limited and time‐locked versions, and the intensity of the network effects is a key factor determining which strategy is optimal.     

Service Systems with Experience‐Based Anecdotal Reasoning Customers

The existing queueing literature typically assumes that customers either perfectly know the expected waiting time or are able to form rational expectations about it. In contrast, in this article, we study canonical service models where customers do not have such full information or capability. We assume that customers lack full capability or ample opportunities to perfectly infer the service rate or estimate the expected waiting time, and thus can only rely on past experiences and anecdotal reasoning to make their joining decisions. We fully characterize the steady‐state equilibrium in this service system. Compared with the fully rational benchmark, we find that customers with anecdotal reasoning are less price‐sensitive. Consequently, with a higher market potential (higher arrival rate), a revenue‐maximizing firm may increase the price if the service rate is exogenous, and it may decrease the price if the service rate is at the firm's discretion. Both results go against the commonly accepted pricing recommendations in the fully rational benchmark. We also show that revenue maximization and welfare maximization lead to fundamentally different pricing strategies with anecdotal reasoning, whereas they are equivalent in the fully rational benchmark.     

Combining decision tree and MAUT for selecting a country for a global manufacturing facility

The paper presents a multi-phase approach for selecting a country in which to locate a global manufacturing facility. An influence diagram is used to frame the decision. A decision tree then analyzes uncertainties regarding cost and generates a risk profile. The risk profile becomes one of the measures in an MAUT model that incorporate a wide range of factors. This sequential approach of using the output from a decision tree as input to MAUT is demonstrated with an example involving an auto supplier locating a new plant in one of five countries. Three decision makers were interviewed to determine the weights and the shape of the individual utility curves. The paper identifies, clearly defines, and incorporates a variety of measures for which national data are readily available. This list is broader and less subjective when compared to other examples reported in the literature.