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Search Results: 1 - 10 of 83154 matches for " 周阿蒙 "
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食品中邻苯二甲酸酯类化合物的检测方法研究进展
Research Progress on the Determination Methods for the Phthalic Acid Ester Compounds in Food
 [PDF]

王萍, 王晓燕, 阿蒙, 王哲君, 沈昊宇
Advances in Analytical Chemistry (AAC) , 2014, DOI: 10.12677/AAC.2014.41001
Abstract: 邻苯二甲酸酯类化合物作为塑化剂被广泛应用于玩具、食品包装材料、医用血袋和胶管制品、高分子塑胶产品等数百种产品中。不可避免残留和迁移至各种包装材料甚至是食品中,其化学毒性日益引起社会的广泛关注。建立有关邻苯二甲酸酯类化合物快速准确的检测方法已成为当今的研究热点之一。本文概述了邻苯二甲酸酯类化合物的性质、危害,综述了食品中邻苯二甲酸酯类化合物的前处理技术与检测方法,并分析了现有检测方法中存在的问题、挑战及发展方向。
Phthalic acid esters (PAEs), widely used as plasticizers in toys, food packaging materials, medical bags, hose products, and hundreds of polymer products, are inevitably retained in and shifted to various packaging materials, even into foods. Their chemical toxicities are increasingly attracting public attention in recent years. To develop rapid and accurate analytic methods for the determination of phthalic acid esters (PAEs) in various matrices has become one of the hot topics nowadays. This paper summarized the properties and harmfulness of PAEs, the recent progress on the pre-preparation techniques and the analytic methods for PAEs in food. Some existing problems and challenges in cur- rent analytic methods, as well as the research trends, have been discussed.
基于光投影数字化传感系统的飞蝗表面三维结构
王军,阿蒙,刘晓利,刘志刚
应用昆虫学报 , 2012,
Abstract:
Optimized two-step phase-shifting algorithm applied to image encryption
优化的两步相移算法在图像加密中的应用研究

孟祥锋,彭翔,蔡履中,何文奇,秦琬,郭继平,阿蒙
物理学报 , 2010,
Abstract: 优化了此前提出的两步相移算法,仅通过两幅去除背景光强(或抑制直流分量)后的干涉图数据和一个(0, π)区间的相移值,就可以成功再现出原始物波场信息,无需借助于物光光强、参考光光强等其他辅助测量信息.与菲涅耳域的双随机相位编码技术结合,该优化算法可以应用于图像加密方案中,通过计算机仿真实验验证了所提方案的可行性,并对几何密钥的灵敏度进行了测试分析.
Range image registration using hybrid genetic algorithm and point to plane distance based measure
基于混合遗传算法和点面距离测度的深度像配准*

GAO Peng dong,PENG Xiang,LI A meng,LIU Xiao li,
高鹏东
,彭翔,阿蒙,刘晓利

计算机应用研究 , 2007,
Abstract: This paper presented a novel approach for precise registration of range images pair with an improved genetic algorithm(GA) and a new error metric based on the point to plane distance. Different to the existed ICP methods, this approach formulated the surface registration as a high dimensional optimization problem. Then combined the strategy of simulated annealing(SA) selection, hill climbing and dynamic parametric space degeneration into a GA to offer much faster convergence and more precise registration. At the same time, employed a new measure based on the point to plane distance as fitness function to evaluate the alignment error, which made the approach more robust. A number of experiments demonstrate that the presented method is insensitive to noises as well as the initial pose estimation and has high precision and fast convergence.
运用两条腿走路的方法掀起更大的跃进高潮

地质与勘探 , 1959,
Abstract: 在党的社会主义建?总路?的光?照耀下,我队在地委及勘探公司的?导下,在1958年生产大跃进的胜利基础上,今年1~4月份各?地?勘探工作??向前跃进了一步,超?完成了国家?划,实?了跃进?划?定的指标,为提的一个季度完成全年?划打下了基础。党在提出1959年是更大、更好、更全面跃进的一年的同时,提了一系列两条腿走路的方?,这些重要的指示,?了我?很大的启发和力量。如何正确地?彻地委和公司的指示,运用两条腿走路的科学方法,
坑??孔定位?量解析法

地质与勘探 , 1957,
Abstract: ??矿体一般极不??,为了探清其产?范?,或为延?地面?孔??下?,必?在坑?进行?孔定位?量工作。地表和坑?的?孔都分?在?一的具有一定方位和?距的勘探??上。这些勘探?有的位于坑道近傍,且其方向大致和坑道方向平行。要?定这些??上的?孔,使其适位于?定的位置上(按??图放样)。必须开拓短小的支岔巷道和??,然后才能准确地?定?孔位置安放?机,进行?进。但为节省开拓工程,所开支岔巷道中??适为?孔至其近傍坑道中?之垂?,因此必?事前作些解析?算工作,?解算?果,标?在坑道图上,再往现?整置仪器指导开掘,?定孔位。
加强高等学校报刊资料的开发利用

科技进步与对策 , 2000,
Abstract: 概述了高校报刊资料使用的现状,阐述了加强开发利用的重要性及必要性,并提出只有对报刊资料进行多形式、深层次地研究加工,才能更好地为教学科研服务。高校报刊资料开发利用
磁控溅射法制备的Ag纳米阵列研究
Preparation of Ag Nano-Array by Magnetron Sputtering Technique
 [PDF]

小芳
Applied Physics (APP) , 2011, DOI: 10.12677/app.2011.13015
Abstract:

本文采用两步阳极氧化法得到了尺寸均匀,排列规则的多孔阳极氧化铝(AAO),以AAO模板为掩膜,利用磁控溅射技术,在AAO模板上成功制备了线状Ag纳米阵列,AFM及EDX分析表明,Ag纳米线的直径与AAO的孔径相当,粗细均匀,约100 nm。根据选区AFM结果,我们讨论了AAO模板孔洞内Ag纳米线的生长机理。实验表明,借助AAO模板,通过磁控溅射的方法可以很方便的制备类似的量子点及金属纳米阵列材料。这种结合AAO模板方法的技术,扩展了纳米阵列材料的应用范围,为生产银纳米阵列材料提供了可行的制备工艺。
Ag nano-arrays have been successfully prepared by magnetron sputtering on/in anodic aluminum oxide (AAO) template. These nano-arrays have order rule and uniform diameter of approximate 100 nm, closely resemble those of AAO. The micrographs and composition of Ag nano-arrays are studied by Atomic Force Microscope (AFM) and Energy Dispersive X-Ray Fluorescence Spectrometer (EDX). The growth mechanism of Ag nano-arrays has been discussed according to the AFM images. The AFM, as well as EDX results clearly indicated that, by the aid of AAO template, metal quantum dots and nanowire arrays can be grown by the magnetron sputtering technique. This method of combining with AAO template broadened the application of the nano-array materials, and provided the possibility of commercial manufacture of silver nano-array.

浅析计算机网络安全
Analysis of Computer Network Security
 [PDF]

宏达
Computer Science and Application (CSA) , 2013, DOI: 10.12677/CSA.2013.34035
Abstract:
伴随着计算机网络的飞速扩展与大范围普及,一方面,它成为人们进行信息交流的基本工具,开放性、高效率和低成本是它的好处;而另一方面,人们也越来越多地感受到它会对我们的信息构成威胁。计算机网络安全成为一个长期的,综合的课题,它涉及面广:包含技术,设备,管理,策略和人为等多个方面。本文介绍计算机网络安全的概念,探讨相关技术,如:数据加密技术、系统安全技术、防火墙技术等,并针对性地探讨一些计算机网络的安全应用和应对。
Accompanied the rapid expansion of computer networks with a wide range of popularity, on the one hand, it became the basic tools for people to exchange information. Openness, high efficiency and low cost are its benefits. On the other hand, more and more people feel it poses a threat to our information. Computer network security has become a long-term, comprehensive subject. It covers a wide range and various aspects: technology, equipment, management, strategy and man-made. This paper introduced the concept of computer network security and related techniques, such as: data encryption technology, system security technology, firewall technology, and specifically discussed the applications and responses to computer network security.
范德华作用的量子化学研究(一)
Quantum Chemical Study of the Role of the van der Waals Interaction (1)
 [PDF]

光耀
Journal of Advances in Physical Chemistry (JAPC) , 2013, DOI: 10.12677/JAPC.2013.22004
Abstract:
用量子化学耦合簇CCSD/aug-cc-pVTz等方法,计算了稀有气体分子,作了电子密度差及图形,通过图形解读了范德华作用的本质和形成机理。提出了范德华作用的量子化学图景是:原子或分子配对的电子云球相碰,由于Pauli互斥,电子云球变形,形成了电子一定程度的回避,同时产生了一定程度的电子共享,达到吸引和排斥的平衡,从而构成了范德华力。认为范德华作用的本质也是一种波函数在起作用,并因此构成了核之间吸引共享电子,也是一种化学作用力。
In this paper, coupled-cluster CCSD/aug-cc-pVTz and related quantum chemistry methods are employed to calculate rare gas molecules and plot figures of electron density differences, the nature and formation mechanism of van der Waals interaction are interpreted graphically. We propose a quantum chemistry picture for van der Waals interac- tion: In the process of the collision of paired electron cloud of atoms or molecules, electron cloud balls deform due to Pauli repulsion effect, and a certain degree of electron avoidance as well as electron sharing are formed. The van der Waals force is the consequence of the equilibrium between the attraction and repulsion. We believe that the nature of van der Waals effect is acting of wavefunction, which results in the internuclear shared electron, so van der Waals ef- fect can also be seen as a kind of chemical force.
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