IPv6与IPv4隧道技术的编程模拟

IPv6协议是因特网的新一代通信协议,如何实现从IPv4到IPv6的平滑过渡是IPv6发展目前急需解决的关键问题。     

基于校园网的IPV6过渡技术研究

随着Internet的飞速发展,基于IPv4的地址空间、服务质量、网络安全等问题已成为制约互联网发展的主要障碍,IPv6是下一代互联网采用的核心协议,彻底、有效地解决了上述问题.本文在分析了IPv6技术优势和发展阶段的基础上,阐述了校园网过渡策略并着重论述了三种过渡技术的特点及实现.     

深入浅出讨论6LowPan技术

6LowPan，即IPv6 over IEEE 802．154，为低速无线个域网标准。IPv6作为网络层互联方案。6LowPan技术引起了广泛的关注。为此，介绍基于6LowPan的技术。讨论技术优势，分析关键技术。重点介绍其在智能家居无线网络中的应用，对其应用前景进行展望。     

IPV4升级到下一代互联网IPv6的技术分析与研究

互联网已经成为人类生活中不可缺少的一部分,随着互联网的不断发展,IPV4地址协议已不能满足我们的巨大需求,IPV6地址协议优势已经被认可,从IPv4过渡到下一代互联网IPv6已势在必行。但如何从IPv4向IPv6平稳过渡,过渡技术的选择和战略布局成为了关键性因素。     

IPv6与IPv4隧道技术的编程模拟

IPv6协议是因特网的新一代通信协议,如何实现从IPv4到IPv6的平滑过渡是IPv6发展目前急需解决的关键问题.     

商业银行应用AR技术前景探讨

增强现实(AR)技术,将虚拟的信息应用到真实世界,越来越广泛运用于生产、生活各个方面。目前AR技术在商业银行的应用尚处于起步阶段,本文对AR技术就商业银行内部管理、对外营销和服务方面等应用前景进行了探讨。     

IPv6在网络远程教育中的优势分析

网络远程教育的迅速发展,IPv4网络协议在远程传输中暴露出来的诸多问题。为新一代网络IPv6的发展带来新的研究方向,本文对IPv4与IPv6在网络远程教育信息传输方面的特点进行了比较,阐述了IPv6在远程教育中的优势,并对基于IPv6的网络远程教育进行了展望。     

燃料电池应用前景广阔

燃料电池由于发电效率高,作为固定或移动电源有着广泛的应用前景,但因技术特性不同,其实际用途也不尽相同。1．用于大型发电厂所谓大型发电厂,其发电设备的功率范围在若干兆瓦到Z000兆瓦之间。对用于发电厂的燃料电池系统而言,不仅要求其经济性好,放射低,而且还要求其发电效率高,对燃料纯度要求低,连续运行寿命长,结构简单等。高温燃料电池（熔融碳酸盐燃料电池和氧化陶瓷燃料电池）用天然气作燃料和内部重整,发电效率可达到65％,因此特别适合用于大型发电厂。根据两种高温燃料电池的工作温度,熔融碳酸盐燃料电池可用于蒸汽轮…     

移动IPv6关键路由技术分析

移动IPv6的实现吸取了移动IPv4的设计经验,利用了IPv6协议的许多新思想、新特征,成为IPv6协议中不可缺少的一部分,对移动性提供了更完善的支持。为了更好地实现移动IPv6的设计,本文对移动IPv6关键路由技术进行了分析。     

新一代互联网的协议——IPV6

IPv6是“Internet Protocol Version6”的缩写,也被称作新一代互联网协议,它有更大的地址空间,简洁的数据报头,更高的安全性,更方便的自动配置等特性和优势,同时,对通信网络的安全、质量和移动性都提出了更高的要求。     

双协议栈在IPv4过渡到IPv6过程中的应用

随着IPv6的迅速发展,IPv4的不足暴露的越来越明显,本文阐述了AKIPv4过渡到IPv6的必然性,重点论述了过渡机制中的双栈技术及其实现模型.     

An OLS approach to computing Ramsey equilibria in medium-scale macroeconomic models

This note describes a general procedure for solving for the steady state and the dynamics implied by the Ramsey equilibrium of medium-scale macroeconomic models. The procedure yields an exact numerical solution for the steady state and second-order accurate dynamics. It introduces a novel projection-based approach to calculating exact solutions to the steady state of Ramsey equilibria.     

Existence and uniqueness of steady-state equilibrium in a two-sector overlapping generations model

In his seminal paper Galor [A two-sector overlapping generations-model: a global characterization of the dynamical system, Econometrica 60 (1992) 1351-1386] establishes conditions for the existence of equilibrium in the two-sector overlapping generations (OLG) model. Although appealing theoretically, these conditions are implicit and not easy to apply. This paper develops new theorems on the existence and uniqueness of steady-state equilibrium in the two-sector OLG model. We provide explicit conditions on the utility and production functions for the existence and uniqueness of equilibrium, with which one only needs to check the derivatives of the production and utility functions and their interactions, without requiring solving for the savings function and its derivatives. We present detailed steps to check the existence and uniqueness of equilibrium and provide illustrative examples.     

Europe vs America: Institutional hysteresis in a simple normative model

We show how the differences in US and European institutions can arise in a normative model. The paper focuses on the labor market and the government's decision to set unemployment benefits in response to an unemployment shock. The government balances insurance considerations with the tax burden of benefits and the possibility that they introduce adverse “incentive effects” whereby benefits increase unemployment. It is found that when an adverse shock occurs, benefits should be increased most when the adverse incentive effects of benefits are largest. Adjustment costs of changing benefits introduce hysteresis and can help explain why post-oil shock benefits remained high in Europe but not in the US. Desirable features of the model are that we obtain an asymmetry out of a symmetric environment and that the mechanism yielding hysteresis is both simple (requires the third derivative of the utility function to be non-negative) and self-correcting. Empirical evidence concerning the role of corporatism is discussed.     

Innovation and the Business Cycle: A Comparison of the U.S. Semiconductor and Automobile Industries

This paper examines data for U.S. automotive and semiconductor firms from 1976 to 2000 to analyze the cyclical nature of innovation, and to find if it is the same across the two industries. Although previous studies have used aggregate data, it does not follow that distinct industries respond to economic fluctuations in the same way. Using patenting as a proxy for innovation, this study finds that there is evidence that innovation is procyclical in the semiconductor industry, but there does not appear to be a similar cyclical pattern in the automobile industry. This has implications for government policy aimed at increasing private sector innovation, particularly at the regional level.     

“6＋1”背景下的辽宁中部城市整合分析

在《辽宁中部城市群经济区发展总体规划纲要》和《辽宁中部城市群发展规划》获得辽宁省政府批准的背景下,关注辽宁中部区域如何抓住机遇,更好更快地发展,提升整体竞争力。在政府规划指引下,结合辽宁中部城市的现状,遵循市场规律,为确保区域整体的快速发展提出城市整合的策略和竞争。     

Less Government—More Wealth? On the Macroeconomics of a Smaller Public Sector in Europe

In this paper, we analyze the reactions of European economies to a fiscal policy strategy aiming at diminishing the public sector. Within the framework of the MSG3 model, a macroeconomic model of the world economy, we perform several simulation experiments to explore the effects of reducing government expenditures permanently in different phases of the business cycle. For this purpose, we combine the fiscal contraction with negative and positive, Euro Area-wide and global, supply and demand shocks. It turns out that adverse Keynesian effects on output and employment tend to be mostly weak and short-lived, whereas long-run effects on output and employment are favorable. Due to these long-run effects, the fiscal contraction policy raises welfare as measured by an asymmetric quadratic objective function. The size of these welfare effects depends on the initial situation in a non-trivial manner.     

Financial development,institutional quality and maximizing-growth trade-off in government finance

This paper studies monetary and fiscal policies in an endogenous growth model with transaction costs. We show that the relation between long-run economic growth and both monetary and fiscal policies is subject to threshold effects, a result that gives account of a number of recent empirical findings. Furthermore, the model shows that, to finance public expenditures, growth-maximizing governments must choose relatively high seigniorage (respectively income taxation), if “institutional quality” and “financial development” indicators are low (respectively high). Thus, our model may explain why some governments resort to seigniorage and inflationary finance, and others rather resort to high tax rates, as a result of growth-maximizing strategies in different structural environments (notably concerning institutional and financial development contexts). In addition, the model allows examining how the optimal mix of government finance changes in response to different public debt contexts. A short empirical section confirms our theoretical results.