Design of an air-slot mode-gap nanocavity in a two dimensional photonic crystal slab

We present a novel and simple design of an air-slot mode-gap photonic crystal(PC) nanocavity by introducing a linear air slot to the center of a line-defect waveguide in a two dimensional triangular-lattice silicon PC slab.A high quality factor(Q factor) of 8.42*105 and an ultrasmall mode volume of 0.998 cubic wavelength are achieved in an optimized air-slot nanocavity which is a suitable choice for the strong matter-field interaction in free space.The high Q cavities with ultrasmall mode volume are important for applications such as quantum computation and nonlinear optics.     

庄子忠孝观的学理解析

庄子关注人生,受儒家思想的影响,认识到忠孝在社会存在的必然性。庄子从名实和真假关系出发,批判了世俗错误的忠孝观,提出了"不用而寓诸庸"的践行忠孝的方法。庄子理想的忠孝观是"入于寥天一"。     

电子测量实验教学改革探索

从电子测量的发展趋势和衡阳师范学院电子测量实验教学的现状出发,针对原有实验教学存在的问题,提出了《电子测量》实验教学改革的具体思路：重应用-以实际应用为目的;强基础-牢固掌握仪器的原理;拓思路-灵活运用测量原理和方法;新内容-现代化内容贯穿全部实验内容;多手段-新的实验手段。     

基于3S技术的第二次全国土地调查与分析

2008年第二次全国土地调查在全国范围内展开，这对于全面查清全国土地利用状况，掌握真实的土地基础数据具有极其重要的意义。3S技术是当前空间技术发展的重要方向，在第二次全国土地调查中发挥了重要的作用。通过重点论述土地调查的技术路线和方法，介绍内业建库的过程并且分析了调查数据变化的原因。     

非奇异H-矩阵的判定及其在神经网络系统中的应用

针对在实用中判别H-矩阵的困难性,通过对矩阵行标作划分的方法,给出了判定非奇异H-矩阵的一组新条件,改进了近期的相关结果,并给出其在神经网络系统中的应用.相应数值示例说明了结果的有效性.     

2010年常德市3～6岁幼儿体质监测报告

欲探讨常德市幼儿体质现状,揭示幼儿生长发育的特点和规律,按《2010年国民体质监测工作手册》的要求,从常德市城乡随机抽取1 866名3～6岁幼儿进行了体质测试和问卷调查.结果显示:2010年常德市3～6岁幼儿的体质水平城镇优于乡村,男童优于女童,也优于2005年湖南省3～6岁幼儿体质水平;幼儿体质不合格率为13.9%,且女童高于男童,乡村高于城镇,但明显低于2005年湖南省幼儿体质不合格率(24.6%);67.6%的幼儿生后4个月内母乳喂养,82.9%的幼儿食用过"垃圾食品",63.9%的幼儿由父母看护,99.8%的幼儿能上幼儿园,但在幼儿园每天身体活动时间明显偏少.建议加强幼儿保健宣教工作的力度,提高社会、幼师、家长对幼儿保健的认识,合理安排幼儿膳食和生活日程,增加幼儿身体活动时间和活动强度,进一步提高幼儿身体素质,改善幼儿体质状况.     

Application of surface plasmon resonance in screening adsorbents and explaining adsorption phenomena using model polymers

A surface plasmon resonance (SPR) technique was developed as an online screening method to identify effective adsorbents for the peptide NH₂-Cys-Thr-Trp-Trp-COOH (CW-4). To validate the SPR technique, several linear polymers containing amino acid residues were synthesized as models of their corresponding adsorbents. SPR screening of all the linear polymers demonstrated that the linear polymer containing phenylalanine residues (PPhe) exhibited the highest affinity for CW-4 among the polymers tested. In accordance with the screening results from SPR, the adsorbent containing phenylalanine (APhe) exhibited the highest adsorption capacity for CW-4. An interesting observation was that the amounts of CW-4 adsorbed on 3 adsorbents were quite small, even though both SPR and isothermal titration calorimetry (ITC) experiments indicated the presence of interactions between CW-4 and the three polymers. A kinetic analysis performed using SPR technology suggested such a phenomenon was ascribed to the poor stability of the CW-4/polymer complexes; that is, CW-4 associates with the polymers quickly, but it also dissociated quickly. The combined results suggested that SPR was a promising tool to identify the optimal adsorbent for peptides, analyze the interactions contributing to adsorption and explain adsorption phenomena using polymer models.     

谈工程投标策略

激烈的市场竞争使建筑工程业面临严峻挑战，市场规范化和法制化又为公平意识创造了条件，在这种背景下，分析投标策略，包括意义、基本类型及制定原则，从而为在竞争中抢占先机，并最终取胜提供思考。     

Rapid Prototyping and Manufacturing Technology: Principle,Representative Technics,Applications, and Development Trends

The rapid prototyping and manufacturing technology (RPM), is an integration of many different disciplines. It is based on an advanced dispersed-accumulated forming principle and originated from 1980s. It generates an entity by first forming a series of layers according to the dispersed section information of the digital model, and then piling the formed layers sequentially together. It is capable of forming parts with complicated structures and non-homogeneous materials. Traditional RPM techniques are mainly used as prototypes in product invention process, such as stereolithography, three-dimensional printing, laminated object manufacturing, and fused deposition modeling. Later, with the progress of material and enabling technology, many new RPM techniques emerged out and have been already applied in the fields such as rapid tooling/moulding, direct formed usable part, nano-/micro-RPM, and biomanufacturing. This high flexible digital manufacturing method has a likely ability to become an almighty forming technology.     

Rapid Manufacturing of Sand Molds by Direct Milling

Direct milling of sand molds is an important development in rapid manufacturing of sand molds. Direct milling is an effective method for manufacturing single or small batches of cast parts. This paper describes experimental investigations to find sand blocks with the appropriate strength, to describe wear patterns of different tools (high-speed steel (HSS), carbide, and polycrystalline diamond (PCD) tools), and to analyze sand mold cutting mechanisms. The results show that the PCD tool outperformes the other tools in terms of tool life. Average flank wear and micro-tipping are the dominant tool failure modes in the sand mold milling process. With a flank wear limit of 0.3 mm, the PCD tool works continuously for about 70 h under the experimental conditions. The experimental results show that the cutting mechanism for direct milling sand molds differs from metal cutting.