基于PDA的GPS/GIS移动计算关键技术研究

嵌入式GIS是一个新兴的应用领域,它是GIS与新兴嵌入式硬件相结合的一个产物,是原有的GIS领域的分支与延伸、补充与发展。基于PDA的嵌入式GIS与GPS相结合实现在移动计算环境下的地图的实时显示有徊好的应用前景。文章针对运行在PDA上GPS与GIS集成的关键技术进行研究,如：GPS数据是如何实现移动计算的、GPS定位信息在PocektPC上的地图实时显示的方法、GP对GIS集成在PDA上的环境选择,开发移动GIS系纺应该考虑的问题。     

基于ARM-Linux的农田信息监测系统

针对基于现场总线技术的数据采集系统线路铺设受限以及依托GSM网络的无线数据采集系统数据有延时现象、成本较高等问题,介绍了基于ARM-Linux的嵌入式远程数据采集系统,提出将嵌入式Internet和无线网络相结合应用在农田信息采集中的做法,给出了系统硬件结构和软件设计,重点研究了移植Boa作为Web服务器的过程以及动态Web技术的实现。本系统能够对较大范围内农田数据进行有效采集,具备良好的稳定性和扩展性。     

基于嵌入式微处理器的GPS跟踪报警系统设计

为实现对地面移动目标的远程跟踪,以嵌入式微处理器ARM Cortex-M3之LM3S1138为 主控制器,结合全球定位系统(GPS)和移动通信(GSM)技术,设计了一款GPS跟踪报警系统, 实现 了对地面移动目标的跟踪报警功能。介绍了GPS跟踪报警系统的结构及工作原理, 阐述了硬件设计和软件系统实现方法。该系统具有安装简单、功能强大、极具实用性 等特点。     

State-led or Capital-driven? The Fall of Bretton Woods and the German Currency Float Reconsidered

This article argues that the lead role of West Germany in the transition from fixed to floating exchange rates sits uneasily with accounts that conceptualise the breakdown of Bretton Woods in terms of hegemonic power politics, the influence of global economic interests or a neoliberal paradigm shift. Short of a convincing explanation, the German currency float seems to be a prime example of states surrendering to financial markets. The article offers an alternative interpretation that focuses on the nexus between state agency and capital accumulation. German authorities were indeed confronted with a destabilising influx of dollars that undermined their available policy options. But as they realised that these inflationary flows emanated from the same export-oriented forces in whose interest they had sought to hold on to an undervalued currency, they chose floating in order to regain command over liquidity and create an anti-inflationary programme that was at the heart of Germany's subsequent ability to better manage the 1970s crisis than its partners. Attention to the particular circumstances and consequences of these ‘structured choices’, I conclude, may offer a more compelling account of financial globalisation as a state-led project than those which generalise from the US context.     

Apology and Ambiguity: Adolf Berle on Corporate Power

A sociocognitive foundation for transformative agency requires much deeper exploration to adequately understand the causal origins of human interests, preferences, and choices as they shape both the emergence of institutions and the process of institutional change. In the collegial spirit of rapprochement, reminiscent of earlier efforts at “bridge-building,” our central contention is that the new institutional economics of “late” Douglass C. North (2005) North, Douglass C. Understanding the Process of Economic Change. Princeton, NJ: Princeton University Press, 2005.[Crossref] , [Google Scholar] provides such a sociocognitive approach, as well as an important ontological frame for dealing with embedded agency. This agency may afford original institutional economics a complementary meta-theoretical account of how institutions are formed and changed over time.     

Extending the Principles of Intensive Writing to Large Macroeconomics Classes

The authors report on the design and implementation of a pilot program to extend the principles of intensive writing outlined by W. Lee Hansen (1998), Murray S. Simpson and Shireen E. Carroll (1999) and David Carless (2006) to large macroeconomics classes. The key aspect of this program was its collaborative nature, with staff from two specialist units joining forces with two economics instructors to provide students with significant resources and direction in a short program of writing, embedded within an intermediate macroeconomics subject at the University of Technology, Sydney (UTS). The objective was to test potential strategies and to identify points of improvement for a more intensive program of writing development at the next stage of implementation. The authors review the literature on student writing and associated assessment issues, outline the central design features of the UTS program, and take a closer look at the centerpiece of a strategy for overcoming writing problems: a series of writing workshops targeted at two related assignments within the intermediate macroeconomics course.     

基于FPGA的信号发生器设计

利用单片FPGA完成了正弦波、方波和三角波信号的发生及其性能调节功能。该系统主要由四个模块组成:电源模块、控制模块、LCD显示模块、D/A转换及功率放大模块。电源模块提供FPGA的5V工作电压和DAC芯片的±12V工作电压;用VHDL语言实现直接数字频率合成技术(DDS),实现波形选择等多种控制功能;利用FPGA内嵌32位NoisII软核设计了一种键盘控制LCD显示的处理器;D/A转换及功率放大模块主要采用高速宽带运放。整个系统稳定度高,控制方便,可扩展性强。     

基于嵌入式技术和Webservice技术的物流信息系统研究

针对物流成本的问题进行了研究,设计了一种融合多种技术的物流信息系统,该系统对物流的管理、效率各方面都有所提高,极大程度上减少了物流成本。     

嵌入式开发Linux与windows共享问题的探讨

随着后PC时代的到来,嵌入式系统越来越流行,社会对掌握嵌入式开发相关技术的人员需求越来越大,而嵌入式技术初学者面临较多需要解决的难题,本文旨在帮助嵌入式Linux开发人员解决在搭建嵌入式开发环境过程中Linux与windows资源共享的问题。     

Fair valuation of cliquet-style return guarantees in (homogeneous and) heterogeneous life insurance portfolios

Participating life insurance contracts allow the policyholder to participate in the annual return of a reference portfolio. Additionally, they are often equipped with an annual (cliquet-style) return guarantee. The current low interest rate environment has again refreshed the discussion on risk management and fair valuation of such embedded options. While this problem is typically discussed from the viewpoint of a single contract or a homogeneous* insurance portfolio, contracts are, in practice, managed within a heterogeneous insurance portfolio. Their valuation must then – unlike the case of asset portfolios – take account of portfolio effects: Their premiums are invested in the same reference portfolio; the contracts interact by a joint reserve, individual surrender options and joint default risk of the policy sponsor. Here, we discuss the impact of portfolio effects on the fair valuation of insurance contracts jointly managed in (homogeneous and) heterogeneous life insurance portfolios. First, in a rather general setting, including stochastic interest rates, we consider the case that otherwise homogeneous contracts interact due to the default risk of the policy sponsor. Second, and more importantly, we then also consider the case when policies are allowed to differ in further aspects like the guaranteed rate or time to maturity. We also provide an extensive numerical example for further analysis.