Single Cu nanowire assembled by microdroplet dielectrophoresis on ultrahigh tensible microelectrodes

At present, study on dynamic tensile properties and atomic chain fabrication of single nanowire, for understanding its dynamic tensile properties and unique physical properties of atomic chain to fabricate atom scale devices, is one of frontier research issues in nanoscale science. However, how to assemble single nanowire on a tensible microstructure becomes one of the most difficult problems, which severely restricts the development of this research field. In this paper, after the ultrahigh tensible microelectrode chip is fabricated by MEMS technology, hexamethyldisilazane is utilized to improve hydrophobicity of the chip, and then a microdroplet dielectrophoresis experimental platform and technology is developed to assemble single nanowire on the sensible microelectrode. Experimental results show that accurate and efficient assembly of single Cu nanowire is realized, which contribute greatly to the further research of dynamic tensile properties and atomic chain fabrication. And for guiding the assembly experiments, finite element technology is also utilized to analyze the local microelectro field around the microelectrodes during dieletrophoresis experiments.     

符号动力系统中同构于Almeida-Ramos树的另一个树

运用纯组合学方法构造了０－１序列的一个树Ｔ，证明了Ｔ同构于Ａｌｍｅｉｄａ－Ｒａｍｏｓ树。此外，还研究了Ｔ的自相似性及Ｔ中元素的特征值。     

船舶主机电脑遥控换向控制方法

介绍了换向三重控制模式，有效地解决了各种类型船舶主机遥控设备存在“前进／后退”更换航向时主机易熄火的难题．该方法已成功地应用于ＳＦＤＹ船舶主机电脑遥控装置．     

磺化改性木素的红外光谱

硫酸盐木素经常压和加压磺化改性后，其红外光谱特征有明显改变。常压改性的木素大分子职的磺酸基因主要定位在苯环上，而加压改性的则主要在与苯环相联接的侧链上，红外光谱说明了它们之间的不同。     

用时序采样法进行轿车后视镜脉动压力场频谱分析

采用二维Ｎ－Ｓ方程及时间序列采样法对轿车后视镜尾部流场中作用于车身壁面的脉动压力进行频谱分析．并与风洞试验实测值进行对比．结果表明无论是时域还是频域，计算曲线都与实测曲线形状吻合，而在量值上相差约３～５ｄＢ．     

房屋建筑现浇板裂缝产生的原因与预防探讨

房屋建筑现浇板出现裂缝是目前建筑工程中较常见的质量通病之一。文章从原料、施工、设计三个方面探析了裂缝产生的原因，并提出了针对性的预防措施。     

Computational intelligence approach for uncertainty quantification using evidence theory

As an alternative or complementary approach to the classical probability theory,the ability of the evidence theory in uncertainty quantification(UQ) analyses is subject of intense research in recent years.Two state-of-the-art numerical methods,the vertex method and the sampling method,are commonly used to calculate the resulting uncertainty based on the evidence theory.The vertex method is very effective for the monotonous system,but not for the non-monotonous one due to its high computational errors.The sampling method is applicable for both systems.But it always requires a high computational cost in UQ analyses,which makes it inefficient in most complex engineering systems.In this work,a computational intelligence approach is developed to reduce the computational cost and improve the practical utility of the evidence theory in UQ analyses.The method is demonstrated on two challenging problems proposed by Sandia National Laboratory.Simulation results show that the computational efficiency of the proposed method outperforms both the vertex method and the sampling method without decreasing the degree of accuracy.Especially,when the numbers of uncertain parameters and focal elements are large,and the system model is non-monotonic,the computational cost is five times less than that of the sampling method.     

浅析东南汽车芯片防盗技术

随着汽车保有量的增加,汽车偷盗事件与日俱增,芯片防盗技术成了汽车防盗的主流。本文主要介绍了东南系列轿车芯片防盗原理、射频识别技术、防盗密码组成及注册等。     

基于汉字字频向量的中文文本自动分类系统

提出了一种根据汉字统计特性和基于实例映射的中文文本自动分类方法。该方法采用汉字字频向量作为文本的表示方法。它的显著特点是引入线性最小二乘方估计（ＬｉｎｅａｒＬｅａｓｔＳｑｕａｒｅＦｉｌ，ＬＬＳＦ）技术建立文本分类器模型，通过对训练集语料的手工分类标引以及对文本和类别间的相关性判定的学习，实现了基于全局最小错误率的汉字———类别两个向量空间的映射函数，并用该函数对测试文本进行分类     

连续测温法研究催化精馏过程宏观动力学

为甲缩醛合成流化催化精馏塔设计需要,建立了原颗粒催化剂宏观动力学快速测定法--连续测温法及其装置,测定了不同粒径催化剂上甲缩醛合成反应的宏观动力学数据,采用二级可逆反应球型等温催化剂有效因子的近似解析解,估计了有效扩散系数.