Galileo系统L1P与L1F信号间干扰的分析

在L1频段上,Galileo系统的授权服务信号L1P和开放服务信号L1F共用中心频点1 575.42 MHz,它们的功率谱部分重叠,相互之间存在干扰。通过仿真研究L1P和L1F信号间的 干扰,对它们的干扰系数、载噪比衰减值进行了详细分析,找出了决定这两种信号间干扰大 小的主 要因素。仿真结果显示,L1P信号受到来自于L1F信号的最大干扰为0.002 dB,来自于CD MA干 扰的最大值为0.26 dB;L1F受到来自于L1P信号的最大干扰几乎为0 dB,来自于CD MA干扰的最 大值为0.604 dB。这表明,CDMA干扰是主要干扰源,L1P和L1F信号间的干扰可以忽略。 这主 要受益于L1P信号采用余弦相位的BOC调制,L1F信号采用CBOC调制,使这两个信号的功率谱 重叠部分大大减少,从而干扰系数很小,大大减小了它们间的干扰。     

高技术产业对传统工业的波及影响分析

文章运用投入产出法,根据2002年和2007年中国42部门投入产出表以及OECD美国2007年的投入产出表计算了中国及美国高技术产业和传统工业的完全消耗系数,结合两国高技术产业的发展情况,对两国产业升级情况进行定量对比分析。分析表明中国技术密集型产业对高技术产业的消耗尤为突出,而劳动密集型产业对高技术密集型产业消耗较低。并依据数据为我国产业发展提出建议。     

用基尼系数衡量我国收入公平的局限性探讨

文章认为,基尼系数在衡量我国收入公平问题存在的局限集中表现在基尼系数自身存在、衡量收入公平和我国收入差距特殊性三个方面。基于此,要结合对居民主观性评判起影响作用的因素和科学的理性统计数据两方面对我国收入公平问题做出符合实际的科学判断。     

住房价格与城镇居民收入分配差距关系研究——基于26个大中城市的实证

收入分配差距增大与住房价格快速增长,是我国经济新常态下需解决的两大问题。从住房价格与收入分配差距的关系入手,厘清两者之间的互动机制,利用2003-2012年26个大中城市相关数据,构造基尼系数与住房价格的面板数据回归模型。实证结果显示,住房价格对基尼系数的影响是正向的;基尼系数对住房价格的影响亦为正向的,但其强度要大于住房价格对基尼系数的影响。同时,研究发现城镇化率、GDP以及第三产业的发展状况等因素亦对住房价格与收入分配差距造成显著地影响。因而在城镇化推进过程中,依据住房价格与收入分配差距的互动关系,应考虑将房地产调控政策与收入分配政策相结合,以求解决房价上涨与收入分配差距拉大这两大问题。     

Regional capital mobility in China: Economic reform with limited financial integration

This paper assesses the changes in the regional capital mobility in China during the period of economic reform in 1978–2008 by employing a panel time varying coefficient (TVP) model. This approach is much more suitable to model China's evolution in the regional capital mobility than a standard structural break model as China's reforms took place gradually and were often implemented over several stages. Using the TVP model, we find that (1) China's provincial capital mobility demonstrated a moderate improvement over the sample period, but worsened temporarily between 1994 and 1997. This is probably due to the government's effort to combat inflation which reduced the investment and transfers to regions; (2) regions with the most developed and least developed provinces experienced higher degree of capital mobility improvement than those in the middle.     

The contribution of social tourism to sustainable tourism: a case study of seasonally adjusted programmes in Spain

Recent policy from the European Union has attempted to justify social tourism initiatives on the basis that they lead to a more sustainable tourism industry. However, the majority of latest research in the field has been focused on the benefits for participants, with the addition of some evidence on the economic impacts of such programmes on destinations, which have pointed towards sustainability outcomes including: a longer tourism season, more even spread of demand, and longer periods of employment for tourism workers. Yet there is a lack of direct evidence linking such programme to these outcomes. This paper aimed to explore this important disconnect between policy assumptions and evidence-based outcomes through an analysis of the deseasonalising effects of the Spanish social tourism programme for older people. The research found that this programme does have an effect on the seasonal nature of employment and economic activity in most regions studied, but that the huge volume of demand from international tourists in the high seasons masks the quantitative effects in the regions with the highest seasonal concentration of international tourists. Recommendations for policy and practice in sustainable tourism are made that are transferable to many countries and regions that adopt social tourism programmes.     

我国中小企业财务实力评价研究

借助于可量化的财务指标评价中小企业财务实力状况,这是中小企业经济发展评价研究的主要内容之一。本文从企业偿债能力、盈利能力、资产管理能力、现金流能力等维度设计11个财务指标,以改进的功效系数法对指标值进行综合评价,以主成分分析法对各项指标赋予权重,从而得出我国目前中小企业财务实力状况评价结果,并在此基础上提出相应的改进对策。     

The Inequality of Regional Economic Development in China between 1991 and 2001

This paper measures the unequal development of the regional economies in China and investigates the primary factors leading to the inequality. The official data on China's regional GDP and the regional GDP of three industrial sectors from 1991–2001, as reported in the China Statistical Yearbook and A Statistical Survey of China, are adopted to calculate and decompose the Gini coefficient for each year. The primary finding is that the levels of inequality in China's regional economies clearly showed a slight upward trend after 1991. The inequality of the overall GDP is primarily attributed to the between-group effect rather than to the within-group effect. It is also found that the regional inequality of the secondary industry sector's development accounted for half of the overall inequality. Thus, this study suggests that it is crucial for China to formulate and adhere to policies that will help it to develop the economy more equally among all areas and to develop the secondary industry sector among all regions/provinces in order to overcome the important issue of the inequality in regional economic development.     

The correlation coefficient and problems of inference in recreation research

Correlation analysis frequently has been used for the investigation of leisure research questions. This paper illustrates the problem of “unequal weighting of cases” which is present in the use of correlation analysis. It further illustrates how this problem can mislead researchers when they make substantive inferences about leisure.     

城市旅游经营效率评价模型研究

目前中国的城市旅游发展存在一种盲目扩张的现象，部分城市想通过扩大旅游业的投入（如大量兴建五星级酒店）来获取更多的旅游产出（收入），衡量一个城市旅游投入与旅游产出的比例关系是否合理是值得深入探讨的一个问题。因此本文构建了基于DEA方法的城市旅游投入产出效率即城市旅游经营效率进行评价模型，在模型中引入了修正系数的概念，以对不同区域的城市由于发展环境的不同造成的旅游产出的误差进行修正。最后对评价模型的适用进行了总结，并对未来的研究进行了展望。