非对称聚合物齿轮的瞬态弹流润滑分析

聚合物齿轮质轻而耐腐蚀,可降低噪声,提高经济效益.相对地,聚合物轮齿强度低于金属轮齿,故采用非对称设计提高聚合物齿轮的强度.为探究非对称聚合物齿轮的弹流润滑特性,在水润滑条件下,采用多重网格法对非对称聚合物齿轮进行了瞬态弹流润滑分析:对比非对称齿轮与传统对称齿轮的水膜压力与厚度;改变齿轮运行工况及考虑轮齿的表面粗糙度,...     

高铅锡杂铜阳极泥处理新工艺研究

根据广西有色某冶炼厂杂铜阳极泥成分特点,前期开发了由氧化焙烧—酸浸—电炉熔炼—铅锡合金电解—焊锡阳极泥处理回收贵金属为主干工艺的流程。主要研究了浸出渣电炉还原熔炼非铁渣系的选择,确定渣型为Si O257%,Ca O 21%,Al2O314%,Na2O 8%。该炉渣熔点1197℃,1300℃时熔渣电导率为0.0408 S/cm、黏度为3.577 Pa·s,熔渣物性满足矿热电炉冶炼操作。     

基于GIS的规划管理信息系统设计思路探讨——以昆明市为例

昆明市规划管理信息系统设计基于GIS技术的设计思路,提出了建立该类系统的解决方案。系统结构由数据层、平台层和应用层等3个逻辑层次构成,包括规划业务审批、CAD绘图、规划管理维护、电子报批及数据变换与共享等5个功能模块,系统具有统一性、完整性和规范性,以期更好地为昆明市规划审批管理服务,以及为其他城市的信息化建设起到借鉴作用。     

化工专业物理化学实验教学改革与探索

从培养创新型、应用型人才出发,对化工专业物理化学实验的教学内容和课程体系、教学方法和手段以及考核方式进行了改革,探讨化工专业物理化学实验教学模式.实践表明,把物理化学实验教学改革与学生的探索精神和创新能力培养结合起来,调动了学生实验的积极性和主动性,促进了知识传授及能力培养的有机统一.     

Peptide Assembly of Al/CuO Nanothermite for Enhanced Reactivity of Nanoaluminum Particles

Biological self-assembly procedures, which are generally carried out in an aqueous solution, have been found to be the most promising method for directing the fabrication of diverse nanothermites, including Al/CuO nanothermite. However, the aqueous environment in which Al nanoparticles self-assemble has an impact on their stability. We show that using a peptide to self-assemble Al or CuO nanoparticles considerably improves their durability in phosphate buffer aqueous solution, with Al and CuO nanoparticles remaining intact in aqueous solution for over 2 weeks with minimal changes in the structure. When peptide-assembled Al/CuO nanothermite was compared with a physically mixed sample in phosphate buffer for 30 min, the energy release of the former was higher by 26%. Furthermore, the energy release of peptide-assembled Al/CuO nanocomposite in phosphate buffer showed a 6% reduction by Day 7, while that of the peptide-assembled Al/CuO nanocomposite in ultrapure water was reduced by 75%. Taken together, our study provides an easy method for keeping the thermal activity of Al/CuO nanothermite assembled in aqueous solution.     

一类具有模糊需求运输调度问题的禁忌搜索算法

在对模糊需求和决策者偏好的概念进行介绍的基础上,研究了一类单收或单发情况下具有模糊需求的车辆路径优化问题,并提出解决该问题的一种禁忌搜索算法.给出了该问题的一个计算实例,实例证明采用禁忌搜索算法解决这类问题是有效的.     

基于主向量分析重建的人脸识别算法研究

提出一种基于主向量分析(PCA)重建的人脸识别方法.传统的特征脸方法是根据PCA投影变换后,利用特征空间的总体散布矩阵最大化的特点进行分类;而本文方法则根据PCA重建误差最小的特点,利用重建误差最小进行人脸的分类.在ORL标准人脸库上的实验结果表明,本文方法优于传统方法,并且具有在增加类别以及增加样本时运算量小的特点,因此具有较好的识别效果及较高的实用性.     

Memristive neuron model with an adapting synapse and its hardware experiments

Electromagnetic induction effect caused by neuron potential can be mimicked using memristor. This paper considers a fluxcontrolled memristor to imitate the electromagnetic induction effect of adapting feedback synapse and presents a memristive neuron model with the adapting synapse. The memristive neuron model is three-dimensional and non-autonomous. It has the time-varying equilibria with multiple stabilities, which results in the global coexistence of multiple firing patterns. Multiple numerical plots are executed to uncover diverse coexisting firing patterns in the memristive neuron model. Particularly, a nonlinear fitting scheme is raised and a fitting activation function circuit is employed to implement the memristive mono-neuron model. Diverse coexisting firing patterns are observed from the hardware experiment circuit and the measured results verify the numerical simulations well.     

医院信息系统优化模式探讨

医院信息系统性能优化贯穿于整个系统存在周期中,各医院在长期的系统优化过程中形成了自己特有的模式。本文就我院信息系统优化的模式进行了探讨,并重点对造成系统性能下降的原因进行了分析,希望能够为大家提供一些参考与帮助。     

FLASH动画中的声画蒙太奇

视和听是FLASH动画传播当中的两个基本元素。两个方面的不断发展和有机结合,才成就FLASH动画丰富的表现力和广泛的实际应用。因此,要想运用好这一动画语言,画面和声音的相互结合,是FLASH动画中不可忽视的基本特性。FLASH动画的声画蒙太奇主要分为三种类型:声画合一、声画分离、声画对位。声画之间相辅相成才能够形成富有感染力的多维向的艺术表达效果。