激光半焊型板式换热器在冶炼领域的应用

本文详细介绍了激光半焊板式换热器的原理,分析了激光半焊模块与普通板式换热器相比较的优越性,并最后给出了其在化工领域应用的最新进展。     

浅谈电炉变压器换档开关

本文主要分析M型带载换档开关结构、工作原理和换档过程的伏安特性，并结合广钢电炉设备多年来的运行和管理情况，提出对M型换档开关的维护和检修意见。     

Simulating the Intensifying Effect of Phosphors on Imaging Plate with UV photons

It is assumed from the energy level that ultraviolet (UV) photons may have intensifying effect on BaFBr: Eu^2 .In this paper, effect of UV photons (220-290 nm) on the PSL intensity of X-ray irradiated BaFBr:Eu^2 was measured and compared to that on the PSL intensity of 220 nm photons irradiated BaFBr: Eu^2 . It was found that after the excitation of UV photons the PSL intensity of X-ray irradiated samples decreases least at 250 nm and that of 220 nm photons irradiated samples increases most at 250 nm. When the irradiation sources are X-rays and 220 nm photons the excited electrons are photoelectron and thermal-electrons, respectively, and they have different possibility of being captured by electron traps or combined with luminescent centers. And the peak at 250 nm can be explained with the model of electrons tunneling. It is assumed that the electrons excited by 250 nm have the most possibility of tunneling.     

用于分类规则提取的演化算法分析与设计

在知识发现流程中,分类规则是主要的挖掘任务之一。针对传统的基于统计分析的挖掘算法在保证知识的有趣性方面的缺陷,提出了利用演化计算这种智能计算模型的全局搜索特性和完全适应值导向特性来进行分类知识的自动挖掘和处理,不需要先验知识,以确保知识的有趣性。提出了用IF-THEN这种高层次的知识表示形式来提高知识的可理解性。并给出了个体表示,遗传操作和适应值评估等几个在演化算法中起重要作用的成分的设计原则和方法。     

轧辊类零件CAD/CAPP集成系统研究

介绍适用于焊管轧辊类零件CAD/CAPP集成系统的功能及其参数化设计过程、绘图环境     

互联网自治的改造实现

本文的自治互联网技术结合互联网现实,通过现有域名体系构造出自主自治的可扩展域名体系和层次结构,并提供自治网络系统内/间的域名解释机制,甚至可以单边行动的方式实现互联网自治的过渡和改造。     

Erratum to: Novel Hybrid Ligands for Passivating PbS Colloidal Quantum Dots to Enhance the Performance of Solar Cells

Nano-Micro Letters -     

洋水仙品种的杂交亲和性

对从荷兰引进的5个洋水仙( Narcissus spp.)品种进行完全双列杂交,研究其杂交亲和性.结果表明:不同组合间,洋水仙品种间杂交及自交结实率差异较大,单果结籽数与籽粒千粒质量亦存在一定差异；其中活话剧的自交结实率最高,为64.29％；自交单果结籽数高达7.64,勃朗宁、嘹亮、荷兰船长的自交结实率较低,不足30％,单果结籽数少于3.0；正反交间亦存在很大差异,其中勃朗宁做母本与嘹亮、小妇人分别杂交、嘹亮做母本与荷兰船长杂交的正反交结实率相差数倍；勃朗宁与嘹亮、勃朗宁与小妇人、勃朗宁与活话剧、活话剧与荷兰船长等4个组合的单果结籽数正反交间差异均成倍变化；相同的母本与不同的父本杂交,结实率和单果结籽数亦存在很大差异,其中活话剧和嘹亮有较好的母本和父本特征,作为母本或父本,二者均具有较高的结实率和单果结籽数.     

分析大学计算机基础课程教学改革的思考与实践

目前，大学计算机基础课程不仅是计算机专业的必修课目，也是非计算机专业必修公共课的重要组成部分。计算机水平的高低直接影响着学生毕业后的就业，在大学教育中占有重要的地位。然而，我国的大学计算机基础课程中还存在一些问题。本文将通过分析大学计算机基础课程的现状，进而提出大学计算机基础课程教学改革的实践，着重分析在更新教学观念、优化教学内容、革新教学方式、完善考核方式、增强激励机制等方面的实践，力求为找到进一步提高计算机基础课程教学质量的方法提出思路及实践参考。     

Preparation of P(St-NMA) microsphere inks and their application in photonic crystal patterns with brilliant structural colors

Patterned photonic crystals with structural colors on textile substrates have attracted a special attention due to the great advantages in application, which currently become a research hot-spot. This study utilized an ink-jet printing technology to prepare high-quality photonic crystal patterns with structural colors on polyester substrates. The self-assembly temperature of poly(styrene-N-methylol acrylamide) (P(St-NMA)) microspheres set to construct photonic crystals were deeply optimized. Moreover, the structural colors of prepared photonic crystal patterns were characterized and evaluated. When the mass fraction of P(St-NMA) microspheres was 1.0 wt.%, the pH value ranged from 5 to 7, and the surface tension was in the range of 63.79 to 71.20 mN/m, inks could present the best print performance. At 60 °C, prepared P(St-NMA) microsphere inks were good for printing to obtain patterned photonic crystals with regular arrangement and beautiful structural colors. Specifically, photonic crystals with different colors could be constructed by regulating the diameter of microspheres in inks, and prepared structural colors exhibited distinct iridescent phenomenon. The present results could provide a theoretical basis for the industrial realization of patterned photonic crystals by ink-jet printing technology.