浅层地下水监测井快速成井工艺试验

地下水监测井是进行地下水各项参数监测的重要途径。随着监测技术的发展,对于成井井管直径的要求越来越小,但是受常规成井工艺的制约。为保障填砾止水工序顺利实施,井管与井壁之间间隙需求较大,使得监测井井径依然较大,而且常规成井工艺工序烦琐、效率低,对地下水填砾止水分层的精细化、准确度较差。依据地下水监测井的目的和特点,通过试验与分析对常规成井工艺进行优化,采用预制滤水管体和止水管体替代填入砾料和止水材料的流程,简化成井工艺,同时满足小口径成井需求,可有效提高钻进效率,降低施工成本,精细准确地进行滤水段和止水段分层,并分析了优化后成井工艺的可靠性,为优质高效地建设浅层地下水监测井提供技术支撑。     

考虑多类型产品新鲜度的生鲜配送路径优化

生鲜产品由于其特殊性,在配送过程中存在损耗。针对不同种类的生鲜产品,差异化新鲜度敏感系数,引入生鲜努力保鲜系数,构建生鲜产品新鲜度函数,同时考虑固定成本、运输成本、制冷成本、货损成本及时间惩罚成本,构建了生鲜配送路径优化模型。设计混合遗传粒子群算法进行求解,验证了模型的合理性及算法的有效性。对比不同的生鲜努力保鲜系数对各项成本的影响,得出综合成本最优的保鲜策略,为生鲜企业末端配送优化提供参考。     

微波梳状线带通滤波器脉冲功能容量的研究

本文以迅速崛起的新兴市场为研究范围,以跨国公司在新兴市场的营销渠道策略的理论和实践的最新发展为研究对象,对跨国公司在新兴市场的营销渠道策略的创新进行分析,以丰富营销渠道的理论和实践.     

The tourism-led growth hypothesis: empirical evidence from Turkey

In the economic growth literature, the contribution of tourism to economic development has attracted great attention due to its significant roles as a source of foreign exchange earnings, creation of employment opportunities and an important source of public revenues in many countries. In this paper, we aim to analyse the empirical relationship between economic growth and tourism by employing different econometric techniques. First, we employed the Bound test approach developed by Pesaran, Shin, and Smith (2001, Bounds testing approaches to the analysis of level relationships. Journal of Applied Econometrics, 16(3), 289–326) in order to investigate the co-integration relationship between economic growth and tourism. Second, we used the Granger causality analysis for the 1998–2011 period and found evidence of a long-run uni-directional causality running from tourism to economic growth, but not vice versa. Our findings show that the Turkish case supports the tourism-led growth hypothesis (TLGH). Third, the autoregressive-distributed lag approach was employed in order to investigate the long-term and short-term static relationship between tourism and economic growth. The results show that tourism has a positive effect on gross domestic product and economic growth both in the long-term and short-term. Finally, the effect of tourism on economic growth was also investigated dynamically by employing the Kalman filter method. The findings of this method support the TLGH for Turkey.     

有源电力滤波器（APF）的开发和实际应用

通过日常工作中的两个实际问题引入有源电力滤波装置（APF）,通过建立APF模型提出问题解决方案,通过APF的理论和消谐分析弄清了电力谐波的滤除过程,为电力设备的消谐和APF的应用推广指明了方向。     

基于微粒群算法的农产品物流配送路径优化研究

通过分析农产品物流配送的特点和对车辆调度的影响,对车辆数目不确定的带时间窗的车辆路径问题进行描述,建立起受成本影响、有时限的农产品物流配送路径优化模型,利用复合最优模型微粒群算法对该模型进行求解,并进行案例比较分析。文中所提出的农产品物流配送优化模型对降低农产品物流配送成本,提高农产品物流配送效率具有较好的实用价值。     

终端短路圆杆交指带通滤波器的设计

介绍了一种终端短路式圆杆交指带通滤波器的设计方法。根据交指滤波器的准确设计理论获得的圆杆自电容和互电容，结合图表得到了滤波器的最初尺寸，并结合微波电路仿真软件对其进行了优化、仿真。仿真结果和实际测试的结果比较一致。证明了设计方法的可行性。     

Are Hodrick-Prescott `forecasts' rational?

We evaluate the usefulness of the Hodrick-Prescott (HP) filter as a proxy for rational expectations, using long runs of annual US inflation data. Our conclusion is that while the HP series are not fully rational in the sense of Muth (1961), they do generally meet the criterion of `weak rationality' recently proposed by Grant and Thomas (1999). They are also rational proxy predictors of direction for, following Merton (1981), agents would not change their prior in the opposite direction to these `forecasts'. However, smoother HP `forecasts' are more prone to inefficiency and less useful predictors of direction. First Version Received: May 2000/Final Version Received: May 2001     

基于邻域信息的噪声图像的恢复

噪声图像的恢复是影响图像信息提取的一个重要因素。主要针对现存的噪声图像恢复算法在消除细线及椒盐噪声方面的困难,基于待检像素的邻域信息提出了一种针对细线和椒盐噪声感染的图像的恢复算法。实验结果表明,文中所提算法不仅具有很好的抑制细线及椒盐噪声的效果,而且有效地保存了图像的细节与结构信息,同时对其它的噪声也有一定的抑制作用。     

一种混沌密码序列的产生及其改进

尝试用数字滤波器产生混沌密码序列 ,针对已有算法和它的一些改进算法存在内部状态间具有较强相关性的问题 ,提出了一种新的改进方法 ,通过合理选择系数 ,产生了效果较好的混沌密码序列