浅谈岩溶区公路路基稳定性的区间模糊评判分析

岩溶区公路路基稳定性研究的方法很多,本文采用区间模糊评判方法结合路基稳定性的特征对岩溶区公路的路基进行全面的分析,通过隶属度和权向量等方法的评判分析出适合岩溶区公路路基稳定性发展的方法,找出最终的测试结果和最终的使用方法。该方法使得岩溶区公路路基稳定性的评判更合理,更具有操作性。     

刘江黄河大桥主桥运行环境下的振动测试

本文通过对刘江黄河大桥主桥运行环境下的振动实测,得到桥梁的在不同频率下的竖向加速度、横向加速度的响应振动稳定图,扭转振型及扭转频率,判断吊杆的损伤对横、竖向振动的影响,推知桥梁目前的运行状态。     

The complex firm financial effects of customer satisfaction improvements

It has been widely assumed that increases in customer satisfaction have continuous financial benefits for firms. However, recent meta-analysis results and anecdotal evidence suggest substantial variability in satisfaction-performance effects. We propose and investigate three explanations for this variability: (1) changing trade-offs of financial benefits vis-à-vis costs along the satisfaction continuum, (2) varying stickiness of benefits and costs over time, and (3) contextual effects related to a firm’s marketing strategic situation. For our empirical investigation, we used customer satisfaction scores and financial data for around 100 U.S. firms over a 15-year period. The results show that revenues and savings in marketing and acquisition costs can accelerate at high satisfaction levels. However, for many firms, operating costs and capital investments also accelerate, and shareholder returns for satisfaction improvements can become negative. Tests over different assessment horizons show that operating cost increases are sticky while top line benefits fade. Finally, firm strategy, offering customization, potential of customer word of mouth, and competitive innovation pressure determine the satisfaction payoffs. Our study will help managers to predict more accurately than before the financial effects of their customer-directed investment decisions.     

车削细长丝杆的技术应用

车细长轴是车削的难点,而加工细长丝杆就更困难,车削细长丝杆中根据工艺要点,抓住跟刀架与中心架的使用。解决工件的热度形伸长及合理选择几何参数,问题就可解决。     

Asymmetric response of the US–India trade balance to exchange rate changes: Evidence from 68 industries

The relationship between the trade balance and the exchange rate continues to attract attention by international economists and has entered into new territory, mostly due to advances in econometric methods. The introduction of asymmetric error‐correction modelling and asymmetric cointegration using the nonlinear ARDL approach of Shin et al. (Festschrift in Honor of Peter Schmidt: Econometric methods and applications, Springer, 2014, 281) as compared to the symmetric and linear ARDL approach of Pesaran et al. (Journal of Applied Econometrics, 2001, 16, 289) has led us in a new direction to discover relatively better results. We apply these methods to the bilateral trade balance model of each of the 68 industries that trade between India and the USA. The nonlinear approach not only provides more support to the J‐curve effect, but also yields support in favour of short‐run and long‐run asymmetric effects of exchange rate changes in most of the industries.     

Income inequality and FDI: evidence with Turkish data

This article explores how foreign direct investment (FDI) and other determinants impact income inequality in Turkey in the short- and long-run. We apply the nonlinear auto-regressive distributed lag (ARDL) modelling approach, which is suitable for small samples. The data for the study cover the years from 1970 to 2008. The empirical results indicate the existence of a co-integration relationship among the variables with asymmetric adjustment of the income distribution in the short- and long-run. The negative impact of FDI on the Gini coefficient, decreasing income inequality, is statistically significant in the short- and long-run, though with a quantitatively small impact in both cases. In the short run, GDP growth increases inequality initially, an effect that is reversed in the next period, increases in domestic gross capital formation decreases inequality, and increases in the literacy rate have very minor adverse effects on income equality. However, in the long run these variables have no statistically significant effects on the Gini coefficient. A reduction in the population growth rate reduces inequality in the short run but has no effect in the long run, whereas an increase in the rate reduces inequality in the long run but has no effect in the short run.     

产业结构升级的就业效应分析

研究产业结构升级与失业率的关系作为判断产业结构升级就业效应的重要指标,具有现实意义。本文通过构建全国产业结构升级与失业率的非线性阈值模型进行研究,研究结果表明：我国产业结构升级呈非线性动态变化,并且产业结构升级过程中对就业产生了较大影响,在产业结构趋于成熟时,就业效应反而不显著。     

射频连接器振动对信号相位噪声的影响

振动环境作用于射频连接器会影响信号的相位噪声。为了提高通信质量,研究了振动对射频连接器相位噪声的影响。分析了振动条件下射频连接器对通过其中的高频信号产生相位噪声的基本原理,推导出了机械振动参数与其产生的相噪功率谱之间的数学关系,验证了振动对不同频率信号的影响关系,并在相应的试验中验证了推导结果的正确性。相关研究结果对分析射频连接器的工程应用中振动对信号的影响具有指导作用。     

房地产泡沫形成机理与防范措施

本文在认识房地产泡沫特点的基础上，深入分析了房地产泡沫形成机理，从而提出了防范房地产泡沫的措施。     

沉积盆地有效储集层综合识别技术新进展

沉积盆地有效储集层综合识别技术是基于线性预测方法技术与非线性预测方法技术有机结合而形成的，它可一次性实现对油气储集层综合再综合评价研究，并可对储集层的岩性及含油气性作出准确的判别。实际应用研究表明，该综合识别技术具有前沿性和实用性，具有广阔的应用前景。