Formation and magnetization reversal mechanisms of nano-size Fe arrays prepared on anodic aluminum oxide templates

Vertically aligned Fe arrays have been self-assembled on anodic aluminum oxide templates by evaporation. The rims of the pores, which act as obstacles to the stacking of atoms, prevent them from forming continuous films. By controlling the Fe nominal thicknesses (τ_n) from 400 to 5 nm, the morphology is changed from continuous film to isolated arrays, leading to the change of the predominant magnetization reversal from domain wall motion to spin rotation. For samples with τ_n < 59 nm, isolated, rather than interconnected, morphology is formed. In this range, the coercivity shows a spectacular change for τ_n = 47 nm, with an array diameter of about 52 nm, achieving a maximum of about 38 kA/m. The critical dimension of single-domain array is therefore determined. The magnetostatic and exchange interactions are reduced due to the thermal fluctuation, and the magnetization leaves from the in-plane direction to be randomly distributed in 3-D, for τ_n < 27 nm.     

未知噪声背景下基于数据阵共轭重构的MUSIC角估计算法

详细讨论了在未知噪声背景下，利用接受数据阵及其共轭重构得到新的数据阵，并借助数据阵的奇异值分解实现UMMUSIC算法（未知噪声背景下的修正多信号分类法），这将有助于改善估计的分辨性及改善协方差阵特征值的分布；同时能更有效地应用于实际，并给出了验证理论分析的计算机仿真结果。     

Super‐reflective color LCD with PDLC technology

Abstract— A novel reflective color LCD without polarizers has been developed using a PDLC film and a retro‐reflector. Bright color images including moving images are achievable with ambient light. This novel LCD will enable the new application area of electronic paper.     

Fabrication of egg-shell-roofed macroporous nickel films by a template-mediated electrodeposition process

Through an electrostatics-induced adsorption effect, nickel ions were found to be preferentially adsorbed onto the surface of colloidal particles at template top during the template-mediated electrodeposition process for preparing macroporous structures. This phenomenon results in the preferential reduction and growth of nickel on colloid surface on the template top, instead of filling into the channels among the colloids. After removing the template, an egg-shell-roofed macroporous nickel, consisting of macroporous film covered with monolayer of hollow spheres, can be created.     

Methods for electronic 3-D moving pictures without glasses

Approaches are described for image acquisition and playback for 3-D computer graphics, 3-D television and 3-D theatre movies without special glasses. Projection lamps, spatial light modulators, CRTs and dynamic scanning are all eliminated by the application of an active image array, all static components and a semispecular screen. The resulting picture shows horizontal parallax with a wide horizontal view field (up to 360°), giving a holographic appearance in full colour with smooth, continuous viewing without speckle. Static component systems are compared with dynamic component systems using both linear and circular arrays. Computer graphic systems are shown, which allow complex shaded colour images to extend from the viewer's eyes to infinity. Large screen systems visible by hundreds of people are feasible by the use of low f-stops and high-gain screens in projecttion. Screen geometries and special screen properties are shown.     

On high-speed computing with a programmable linear array

It has been observed by many researchers that systolic arrays are very suitable for certain high-speed computations. Using a formal methodology, we present a design for a single simple programmable linear systolic array capable of solving large numbers of problems drawn from a variety of applications. The methodology is applicable to problems solvable by sequential algorithms that can be specified as nested for-loops of arbitrary depth. The algorithms of this form that can be computed on the array presented in this paper include 25 algorithms dealing with signal and image processing, algebraic computations, matrix arithmetic, pattern matching, database operations, sorting, and transitive closure. Assuming bounded I/O, for 18 of those algorithms the time and storage complexities are optimal, and therefore no improvement can be expected by using dedicated special-purpose linear systolic arrays designed for individual algorithms. We also describe another design which, using a sufficient large local memory and allowing data to be preloaded and unloaded, has an optimal processor/time product.An earlier version of this paper was presented at Supercomputing '88.This work was partially supported by ONR under the contract N00014-85-K-0046 and by NSF under Grant Number CCR-8906949.     

（n,（n—1）!）——拉丁阵的随机生成

本文介绍了全部ｎ阶置换的生成算法和由任一序中ｍ（０≤ｍ≤│Ｓｎ│－１）求出与（ｎ，（ｎ－１）！）－拉丁阵中序号相同的列的算法，并利用拉丁阵的组合性质和以上两个算法随机生成了一个（ｎ，（ｎ－１）！）－拉丁阵。     

近场扫描光子显微镜尖端制作的正交设计

利用正交设计试验方法，找到了利用化学腐蚀法制作 近场扫描光子显微镜尖端的影响因素及在素的最佳状态，利用正交设计试验所得结果，可制造曲率半径小于１２０ｎｍ的尖端。     

光学CT方法用于大坝垂线坐标的检测

把光学ＣＴ技术应用于大坝变形垂线坐标的测量，研制了用阵列光源和电荷耦合器件ＣＣＤ线阵构成的一种新型垂线坐标仪。工程现场测试资料表明，该坐标仅用观测精度高，稳定可靠并能自动化监测的优点。     

Evaluation of chicken freshness using a low-cost colorimetric sensor array with AdaBoost–OLDA classification algorithm

This paper attempted to evaluate chicken freshness using a low-cost colorimetric sensor array with the help of a classification algorithm. We fabricated a novel and low-cost colorimetric sensors array, with a specific colorific fingerprint to volatile compounds, using printing chemically responsive dyes on a C2 reverse silica-gel flat plate. In addition, we proposed a novel classification algorithm for sensors data classification – orthogonal linear discriminant analysis (OLDA) and adaptive boosting (AdaBoost) algorithm, namely AdaBoost–OLDA. And we compared it with two classical classification algorithms – linear discriminant analysis (LDA) and back propagation artificial neural network (BP-ANN). Experimental results showed classification results by AdaBoost–OLDA algorithm is superior to BP-ANN and LDA algorithms, the classification results by which are both 100% in the calibration and prediction sets. This study sufficiently demonstrated that the colorimetric sensors array with a classification algorithm has a high potential in evaluating chicken freshness, and AdaBoost–OLDA algorithm has a strong performance in solution to a complex data classification.