Tae-Sook Han

Analysis of heart rate variability (HRV) often requires a continuous representation of the inherently discrete heart rate measurement.In combination with a suitable cardiac pacemaker model, e.g. the integral pulse frequency modulator (IPFM) , the cardiac event series can be considered as an irregular sampling of a continuous input to the pacemaker model, met).Continuous representation of heart rate can thus be achieved by a reconstruction of the input function met) from the cardiac event series.

Dual phase heat treatment is an economical and effective way for improving the properties of low carbon steels and low-alloy steel materials. In this paper, the microstructures and mechanical properties of 20MnSi steel treated by different dual phase heat treatment have been studied. The results show that dual phase heat treatment with pre-quenching technique and then heating from room temperature to the critical zone can achieve finer and more homogeneous microstructure than that with pre-norma

This paper presents a method of estimating the setting time of cement mortar incorporating recycled aggregate powder (RP) and cement kiln dust (CKD) at various curing temperatures by applying an equivalent age method. To estimate setting time, the equivalent age using apparent activation energy (Ea) was applied. Increasing RP and CKD leads to a shortened initial and final set. Ea at the initial set and final set obtained by Arrhenius function showed differences in response to mixture type. These

This study investigates two camera self-calibration approaches, on-site self-calibration and laboratorial self-calibration, both of which are based on self-calibration theory and implemented by using a commercial photogrammetric solution, Agisoft PhotoScan. On-site self-calibration implements camera self-calibration and aerial triangulation by using the same aerial photos. Laboratorial self-calibration implements camera selfcalibration by using photos captured onto a patterned target displayed o

这篇论文为基于随机的模糊模拟在随机的模糊环境解决抑制机会的编程建议一个适应混乱量蜂蜜蜜蜂算法(CQHBA ) 。随机的模糊模拟被设计估计一个随机的模糊事件和乐观价值的机会到一个随机的模糊变量。在 CQHBA，每只蜜蜂带代表一个解决方案的一组量位。在选择 best-so-far 食物来源附近的混乱优化搜索空间。在婚姻过程，随机的干涉的分离的量转线路在选择雄蜂和女王之间被做。Gaussian 量变化被用来保留整个人口的差异。计算量旋转角度的新方法基于毕业生被设计。为 CQHBA 的集中的一个证明被开发，为算法的计算开销的理论分析被介绍。数字例子被举示威它在坚韧性和稳定性，计算复杂性的效率，成功率，和答案质量的精确性的优势。CQHBA 被表明在各种各样的条件下面高度柔韧并且能够与任何参数设置，可变初始化，系统忍耐和信心水平，不安，和噪音处理很随机的模糊编程。关键词蜂蜜蜜蜂算法 - 随机的模糊编程 - 量计算 - 混乱优化 - 坚韧性这个工作被国家高技术研究和中国(863 程序)( 号码 2007AA041603 ) 的发展节目支持，中国(号码 60475035 ) 的国家自然科学基础；给技术

微塑造的技术在微模式的聚合物和功能的设备的开发的制造起了一个重要作用。在如此的一个过程，合适的溶剂能胀大或溶解聚合物电影减少他们的玻璃转变温度(Tg ) 和粘性并且从而改善流动能力。因而，与高保真度获得 2D 和 3D 模式由是容易的帮助溶剂微塑造。与塑造的高温度相比，这种技术克服象在冷却以后缩小那样的一些缺点，在高温度的降级，在处理有高 Tg 的一些功能的材料的困难，等等。它能被用于不仅在聚合物单层上而且在聚合电解质 multilayers 上做模式。而且， multilayers 上的导致压缩的模式化学上同质却身体上异构。在这评论，模式质量上的控制因素也被讨论，包括模子，溶剂，压力，温度和模式密度的材料。

For cold weather concreting, frost damage at early age is generated in the concrete, and problems such as delaying of setting and hardening and lowering of strength manifestation emerge due to the low outside air temperature at the early stage of pouring, making the selection of an effective curing method critically important. Unfortunately, the tent sheet currently used as the curing film for heating insulation at work sites, not only has the problems of inferior permeability and extremely dete

Bifurcations of subharmonic solutions of order m of a planar periodic perturbed system near a hyperbolic limit cycle are discussed. By using a Poincare map and the method of rescaling a discriminating condition for the existence of subharmonic solutions of order m is obtained. An example is given in the end of the paper.

To improve the initial coulombic efficiency and bulk density of ordered mesoporous carbons, active Fe2O3 nanoparticles were introduced into tubular mesopore channels of CMK-5 carbon, which possesses high specific surface area (>1700 m 2 g-1 ) and large pore volume (>1.8 cm 3 g-1 ). Fine Fe2O3 nanoparticles with sizes in the range of 5 7 nm were highly and homogenously encapsulated into CMK-5 matrix through ammonia-treatment and subsequent pyrolysis method. The Fe2O3 loading was carefully tailore