塑造 SP企业核心竞争力的途径探析

自2000年信息产业部颁发第一张增值电信业务运营许可证至今，我国SP行业经历了一个快速增长的过程。在此过程中，SP行业出现了诸多问题：如企业无话语权，企业出现诚信问题，尤其是绝大多数企业都没有形成核心竞争力，面临着被洗牌的危险。SP企业塑造核心竞争力应实施三个差异化战略：客户资源制胜战略、内容制胜战略和技术制胜战略。     

WCDMA-GSM七频段手机射频前端的简化设计

通过分析使用SP9T天线开关实现WCDMA-GSM双模七频段的典型手机射频电路,提出了一种 采 用SP4T天线开关的简化设计方案。该设计在保证性能的前提下,极大地降低了成本和器件面 积。测试结果表明,该方案各项射频指标,包括发射功率、灵敏度、PVT、频率误差、相位 误差、调制频谱和开关频谱等,全部符合3GPP的通信标准,完全能够实现WCDMA和GSM两种移 动通信制式的7个频段的通信能力。该方案已成功应用于实际的手机产品当中。     

HOPE,FEAR, AND ASPIRATIONS

We propose a rank‐dependent portfolio choice model in continuous time that captures the role in decision making of three emotions: hope, fear, and aspirations. Hope and fear are modeled through an inverse‐S shaped probability weighting function and aspirations through a probabilistic constraint. By employing the recently developed approach of quantile formulation, we solve the portfolio choice problem both thoroughly and analytically. These solutions motivate us to introduce a fear index, a hope index, and a lottery‐likeness index to quantify the impacts of three emotions, respectively, on investment behavior. We find that a sufficiently high level of fear endogenously necessitates portfolio insurance. On the other hand, hope is reflected in the agent's perspective on good states of the world: a higher level of hope causes the agent to include more scenarios under the notion of good states and leads to greater payoffs in sufficiently good states. Finally, an exceedingly high level of aspirations results in the construction of a lottery‐type payoff, indicating that the agent needs to enter into a pure gamble in order to achieve his goal. We also conduct numerical experiments to demonstrate our findings.     

Integration of HSR and air transport: Understanding passengers’ preferences

Different solutions for the integration of high-speed rail (HSR) and air transport could be implemented, ranging from very basic integration to more sophisticated systems which include ticket and handling integration. A discrete choice experiment is conducted to better understand passengers’ preferences. We estimate a number of flexible choice models, taking into account the existence of systematic and random taste heterogeneity. We obtain a range of willingness-to-pay values for service quality attributes, finding some important results that can be used to infer policy conclusions about the real attractiveness of the Air–HSR integrated alternative. In this respect, we find that schedule coordination which reduces connecting time will be crucial.     

Fast and realistic European ARCH option pricing and hedging

The behavior of the implied volatility surface for European options was analysed in detail by Zumbach and Fernandez for prices computed with a new option pricing scheme based on the construction of the risk-neutral measure for realistic processes with a finite time increment. The resulting dynamics of the surface is static in the moneyness direction, and given by a volatility forecast in the time-to-maturity direction. This difference is the basis of a cross-product approximation of the surface. The subsequent speed-up for option pricing is large, allowing the computation of Greeks and the delta replication strategy in simulations with the cost of replication and the replication risk. The corresponding premia are added to the option arbitrage price in order to compute realistic implied volatility surfaces. Finally, the cross-product approximation for realistic prices can be used to analyse European options on the SP500 in depth. The cross-product approximation is used to compute a mean quotient implied volatility, which can be compared with the full theoretical computation. The comparison shows that the cost of hedging and the replication risk premium have contributions to the implied volatility smile that are of similar magnitude to the contribution from the process for the underlying asset.     

商业企业的SP促销策略

SP促销是现代市场营销宝库中使用最为广泛的一种拓展市场，促进销售的利器。SP促销对激励消费者购买行为，增进销售，扩大营业额，提高企业知名度等方面有着独特的功效。只有认真研究SP促销的特点，灵活运用SP保销方式，才能更好地发展SP在商业企业营销活动中的作用。     

论构建创新型电信运营模式

在以“开放、合作、共赢”为主旋律的新通信时代,通信产业链发生了深刻的变革,原有电信运营模式已与新型通信产业链不相适应。在此背景下,通过深层地分析通信产业链的演变方向和特征,以整合通信产业链为切入点,提出了创新型的电信营运模式。     

The energy cost of satisfying basic human needs

This article attempts to estimate how much energy is required to satisfy basic human needs; previous estimates of human energy needs exist but are found wanting. The analysis is based on the Latin American World Model, a simple econometric model that, assuming basic needs-oriented development and certain basic needs targets and considering three developing regions (Latin America, Africa, and Asia), determines per capita income levels at which basic needs are satisfied. Using figures for income and price elasticities of commercial energy demand and for noncommercial energy consumption from the literature, we calculated a range of 27 × 10³ to 37 × 10³ kcal/day per capita for the energy cost of meeting basic human needs. This energy cost range is below current per capita world energy consumption, implying that theoretically all people's basic needs could be met at today's world energy consumption level.