BOC(10,5)信号的调制与解调

讨论了卫星导航中BOC调制解调的原理和实现方法，并着重研究了接收机的码跟踪技术。首先阐述了BOC信号体制出现的国际背景及信号特点，并介绍了BOC（10，5）信号形式和频谱特性，然后简要介绍了信号调制的方法，最后重点讨论信号解调方法。针对BOC信号多峰结构的自相关特性，分别研究并比较了两种解调方案，最后综合两者特点提出了组合式解调恢复方法。     

ECONOMIC SANCTIONS REVISITED: ADDITIONAL INSIGHTS INTO WHY THEY FAIL

Economic sanctions have a poor track record in achieving their objectives. In most cases, they are ineffective in bringing about policy change, cause increased suffering in the sanctioned country and reduce opportunities for business. This paper provides additional insights into why sanctions fail by examining two overlooked factors: power–dependency theory and pressure for political stability.     

河北省土地生态系统服务价值研究及趋势预测

编制适用于河北省的土地生态系统服务价值系数表,利用土地基础数据和生态系统服务价值量化模型,计算出河北省土地生态系统服务价值在1996～2006年呈现先减少后增加的变化趋势;并运用spss统计软件中的曲线回归对变化趋势做出了合理预测。     

A Nonlinear Model of the Term Structure of Interest Rates

We present an economically motivated two–factor term structure model that generalizes existing stochastic mean term structure models. By allowing a certain parameter to acquire dynamical behavior we extend the two–factor model to obtain a nonlinear three–factor model that is shown, in a deterministic version, to be equivalent to the Lorenz system of differential equations. With reasonable parameter values the model exhibits chaotic behavior. It successfully emulates certain properties of interest rates including cyclical behavior on a business cycle time scale. Estimation and pricing issues are discussed. Standard PCA techniques used to estimate HJM type models are observed to be equivalent to dimensional estimates commonly applied to 'spatial data' in nonlinear systems analysis.
It is concluded that techniques commonly used in the analysis of nonlinear systems may be directly applicable to interest rate models, offering new insights in the development of these models. Tests of nonlinearity in interest rate behavior may need to focus on long cycle times.     

考虑应力作用影响的黄泛区粉土土水特征曲线分析与预测

为了研究应力作用对土水特征曲线的影响，采用应力关联土水特征仪测定不同应力下粉土的脱湿-吸湿曲线，讨论应力变化对粉土土水特征的影响规律，并利用应力与孔隙比的关系提出考虑应力作用的粉土土水特征曲线预测方法。研究发现：试样在应力逐渐增加时不易脱水，但更易吸水，非饱和粉土的持水能力随着正应力的增大而增强；脱湿曲线与吸湿曲线并不重合，有明显的回滞现象，并且吸湿曲线饱和度的变化比脱湿曲线更加剧烈；随着正应力的增大，滞回圈面积减小，滞回特性减弱。此外，将预测曲线与测得的试验曲线对比, 可知提出的考虑应力的土水特征曲线预测方法具有较好的预测精度。     

Putting the learning curve in context

In implementation of change, people learn new ways of doing things, develop new skills, and adopt new organizational routines. This paper applies learning curve theory to implementation by developing a system dynamics model that includes two extensions to classic learning curve theory. First, the model includes a required output level for the individual. Second, the model includes a budget constraint on time that forces a choice between an old and a new way to achieve the output. Doing work the new way builds experience, increasing productivity and thus favoring continued use of the new skill, but model analysis demonstrates that this reinforcing process works to favor the new skill only at relatively high levels of productivity. Otherwise, the same process is a vicious cycle, driving out the new skill. The model exhibits a mode of behavior in which learning begins and then stalls and another mode in which the new skill becomes the preferred one. The paper identifies the tipping point between these two modes and characterizes the transition problem: Learning by doing is a dynamic process, a transition from use of an old way to a new way that requires accumulating experience beyond a threshold.     

The Swedish third way: an assessment of the performance and validity of the Rehn-Meidner model

This paper analyses the functioning of the Rehn–Meidnermodel in Sweden and the validity of the model's underlying theory.Both sceptics and friends of ‘the Swedish model’have exaggerated the effects of active labour market policyand solidarity wage policy on employment, inflation and growth.However, these policies have contributed to the reduction ofhysteresis effects and wage differentials in Sweden. Furthermore,Swedish experiences confirm the Rehn–Meidner view thatpositive demand shocks and expansionary macroeconomic policiesmake it difficult to combine full employment with price stability,economic growth and equity even if central wage negotiationsare coordinated and trade unions willingly accept wage restraint.     

新疆人口城市化问题研究

运用人口普查资料及其它人口统计数据 ,分析新疆城镇人口过去 50年的变化 ,探究新疆人口城镇化过程的特征和成因 ,并运用数学模型预测未来新疆城镇人口及人口城镇化水平。提出新疆城镇体系发展战略构想及对策     

Inflation dynamics and nominal adjustment in the Baltic States

The paper seeks to explain the inflationary dynamics in the Baltic countries since the mid-1990s. Single-equation estimations generally yield poor results, while panel data estimations provide statistically and economically satisfactory findings. The main result is that the observed gradual disinflation can to a large extent be explained by adjustment to international prices. Stringent fixed exchange rate systems have exerted downward pressure on inflation both directly and via expectations to future inflation. Measures of excess capacity in the labour market have no effect on inflation, while industrial output gaps have some explanatory power. Real oil price shocks have an immediate but short-lived impact on inflation.