基于零值补偿和EMD的加速度积分误差消除方法

为探求加速度积分误差的消除方法,利用频谱对实测加速度数据进行分析,以误差频率和理想的加速度变化曲线来评价误差。采用基于零值补偿和经验模态分解(Empirical Mode Decomposition,EMD)的方法,对实测数据进行了误差校正与评价,实践证明该方法能有效消除积分算法中的误差。     

企业技术创新行为致错机理分析

企业在技术创新过程中,除了受外部诸多不可控制的不确定性因素影响之外,创新个体的行为对技术创新的结果起着决定性作用,而创新个体的行为往往受自身因素、情境Υ态和组织因素的影响,这就决定了技术创新活动中错误行为的产生是不可避免的。文章通过分析企业技术创新过程中人因失误的产生机理,认为创新个体所处的情境Υ态错误和组织错误通过个体因素触发形成了潜在型人误,并最终表现为显现型人误。进而建立了技术创新不同层面致错因素相互作用的概念模型,从而为企业在技术创新过程中更好地辩错、防错和化错提供思路。     

膜式燃气表计量稳定性的改善方法

膜式燃气表的主要功能就是计量,而计量误差是否稳定可靠则是产品应用中的关键指标,通过分析膜式燃气表的计量原理及检测工艺,改善产品计量过程中的工作状态,以实现产品计量中示值误差的稳定可靠。     

DDA法圆弧插补误差分析及解决办法

插补是指数据密化的过程。DDA法插补是比较常用的一种插补方式,但在实际应用中易出现插补误差,本文通过实例解析,通过增加终点判别器的方法很好的解决了这个问题。     

技术创新资源配置的双重调节论

文章对资源配置的市场调节、政府调节、双重调节机制,以及我国技术创新资源配置中的双重调节作用进行了理论分析,选择美国的自由市场经济模式、德国的社会市场经济模式、日本的政府协调型主导市场经济模式和韩国的政府干预型主导市场经济模式等技术创新资源配置模式为分析对象,通过对上述国家四种模式中的双重调节作用进行比较,基本结论是:创新驱动发展战略需要有效发挥对技术创新资源配置的双重调节作用;充分发挥市场在技术创新资源配置中的决定性作用,进一步加大市场化改革力度,发挥和完善市场机制的作用,推进技术创新资源的市场化配置,是我国深化科技体制改革的关键之一;充分发挥政府在技术创新资源配置中的导向性作用,以迅速提升我国技术创新能力。     

船载雷达光机轴偏差的动态标校

为解决船载雷达在海上动态情况下雷达光轴与机械轴之间的偏差无法准确标校的问题,提出了采用标校电视反向法瞄船桅光标,在海上动态条件下标校雷达光机偏差的新方法,并分析了该方法的可能误差源,得出改正角误差是反向法光机偏差标校的最大误差源,给出了减少或避免改正角误差的三个解决方法,即智能选择法﹑相对比较法和最小二乘法,利用相对比较法对反向法光机偏差标校数据进行误差修正,标校精度优于10″。试验结果表明,该方法解决了近距离改正角误差较大的技术难题,提高了标校精度,且该方法操作性强,在船载雷达上有较高的实用价值。     

Agritourism and off‐farm work: survival strategies for small farms

This study considers agritourism and off‐farm work as income diversification choices simultaneously and analyzes factors influencing such choices. Further, the study assesses the impact of agritourism, off‐farm work, and both on gross cash farm income and total farm household income. We utilized large set of nationwide farm survey data and selectivity‐based multinomial choice model. An important finding of our study is that small farms have higher household income if they choose both income diversification strategies rather than a single strategy. Results suggest that education, age of the operator, financial condition, and location of the farm are important factors driving income diversification alternatives. Finally, our study indicates that accounting for selectivity is essential to ensure unbiased and consistent estimates.     

我国水产品海／淡比重对城镇居民额外消费支出的影响

我国水产品存在“质量”引致城镇居民额外消费支出现象,论文以Deaton理论为依据,利用VECM模型研究了海／淡产品结构对额外“质量”支出的影响。研究结果表明,海／淡比重调整是我国城镇居民“质量”消费支出增长的诱因,二者呈负相关关系,其中海水贝类与淡水甲壳类是导致该现象的重要因素。因此,一方面对水产品未来需要更全面和细分的价格监控,另一方面扩大海水产品比重（特别是贝类）有利于缓解城镇居民购买水产品时的额外支出增长。     

Understanding Society: the income data

We introduce the income data of Understanding Society, the UK Household Longitudinal Study. First, we show that the data are widely used in academic and policy research. We then discuss the pros and cons of different types of data on household incomes. We go on to describe the income content of Understanding Society, emphasising key details of data collection and data processing – specifically the derivation of net household income totals. We perform a quality assessment that compares Understanding Society estimates of net household incomes to those from a reliable cross-sectional source – the Households Below Average Income series. We conclude that the Understanding Society income data are of high quality, and so are an excellent source for research on the income distribution or incomes more generally. We finish with a discussion of future directions for income data collection in the study.     

Risk management,legitimacy, and the overseas subsidiary performance of emerging market MNEs

Multinational enterprises (MNEs) are exposed to substantial risks when operating abroad and effective risk management plays a key role in determining firms’ competitiveness and success in overseas markets. Integrating the notion of home-country government-created advantages with the legitimacy perspective, we look at a concrete manifestation of government-created advantages, the impact of home-country risk-safeguarding mechanisms on Chinese MNEs’ overseas subsidiary performance. Moreover, we examine their effect under the contingency of firms’ legitimacy in host countries. Using survey data, we find that Chinese MNEs’ overseas subsidiary performance is positively associated with the use of home-country risk-safeguarding mechanisms. The strength of this association depends on Chinese firms’ legitimacy in host countries. The low level of legitimacy of these firms with host-country government and business communities can generate a negative spill-over effect that compromises the role of home-country risk-safeguarding mechanisms.