免疫信息系统的数据安全与应用

随着社会的进步,居民生活水平的不断提高,疾病防护与儿童免疫全面信息化管理已经成为社会趋势。而对于该系统的数据安全问题就更显得十分重要,本采用双机热备份系统,对数据进行实时备份。     

立式染色机典型缺陷及产生机理

针对承压印染设备在使用中缺陷较多、设备寿命普遍较短的问题,运用无损检测、理化分析配合有限元数值模拟 的方法,对一批较有代表性的立式染色机进行了全面检验,并将检验过程中发现的典型缺陷进行了总结和分析。根据对 快开门结构运行过程中的力学分析结果,从设备应力分布特性角度提出应力腐蚀失效易发部位,并综合设备的检验结果 进行比较,进而提出结构优化的建议。缺陷机理分析结果表明,在应力集中、疲劳载荷、腐蚀等因素的综合作用下,承压 印染设备极易产生裂纹等使用缺陷,应根据设备的使用情况和腐蚀现状调整检验周期,并针对缺陷易发部位进行定期全 面检验。     

基于RPi的面曝光快速成形机控制系统

为了简化面曝光快速成形机的控制系统,降低其成本,提出了一种基于树莓派( Raspberry Pi,RPi)卡片电脑的面 曝光快速成形机控制系统。系统以Raspberry Pi为控制核心,以Linux为操作系统,通过Pvthon编程控制,实现了对面曝 光快速成形机的掩模图形投影和工作台运动控制;利用接入以太网的Raspberry Pi,实现了对面曝光快速成形机的远程 登录、文件传输以及实时监控。控制系统大大减小了面曝光快速成形机的占用空间,降低了成本,且具备远程操作功能, 有利于面曝光快速成形机进入大众市场。     

胶辊数字中高机的设计

针对印刷机中普通胶辊由于胶辊扰度造成印制品厚薄不均的问题,以中高度法原理为依据,提出了将中高度曲 线方程解析成以时间为变量的函数,用单片机计算和控制中高机运动,设计了以单片机、交流伺服控制器、变频器和磨头 等构建的一个数字控制系统为核心的胶辊数字中高机。应用结果表明数字中高机可安装在普通车床上实现中高胶辊的 加工,且中高曲线和中高度可任意设置,设计简便实用,便于推广。     

工业缝纫机针杆的气浮轴承性能数值计算与分析

为了对气浮针杆的小孔节流型轴承的支承性能进行研究,文章在建立数学模型的基础上,运用有限差分法对控 制方程进行数值有限差分的推导,利用MATLAB对针杆在低速和高速的情况下的压力分布进行了数值求解。结果表 明：气浮轴承能够较好地实现工业缝纫机的低速和高速情况下的气浮支承;双排节流小孔的压力分布承载效果比单排节 流小孔好;随着气浮针杆运动速度的变化双排节流小孔的气浮轴承的稳定性较好。对进一步深入对工业缝纫机针杆的 气浮支承研究具有指导意义。     

The two-dimensional vector packing problem with piecewise linear cost function

The two-dimensional vector packing problem with piecewise linear cost function (2DVPP-PLC) is a practical problem faced by a manufacturer of children׳s apparel that ships products using courier service. The manufacturer must ship a number of items using standard-sized cartons, where the cost of a carton quoted by the courier is determined by a piecewise linear function of its weight. The cost function is not necessarily convex or concave. The objective is to pack all given items into a set of cartons such that the total delivery cost is minimized while observing both the weight limit and volume capacity constraints. This problem is commonly faced by many manufacturers that ship products using courier service. We formulate the problem as an integer programming model. Since the 2DVPP-PLC generalizes the classical bin packing problem, it is more complex and challenging. Solving it directly using CPLEX is successful only for small instances. We propose a simple heuristic that is extremely fast and produces high-quality solutions for instances of practical size. We develop an iterative local search algorithm to improve the solution quality further. We generate two categories of test data that can serve as benchmark for future research.     

基于微博情绪信息的股票市场预测

行为金融理论的研究表明,股票投资者在进行投资决策时,容易受到自身的因素如情绪与心理因素的影响.以行为金融理论为依据,作出基本假设:微博情绪信息反映的社会整体情绪倾向能够影响并预测股票市场整体价格走势的变化.实证过程包括抓取新浪微博数据并进行预处理,生成情绪倾向时间序列,通过格兰杰因果关系检验上证指数时间序列与情绪倾向时间序列间的相关关系,建立支持向量机模型预测股票市场价格的变化采验证假设的正确性.实验结果显示加入微博情绪信息的预测模型能够获得更高的准确率,进而证明了本文所作假设的正确性.     

The geographic distribution of gaming machine proceeds in New Zealand

ABSTRACT

Within NZ gambling and its associated harms are well-researched topics. However, most studies to date have relied upon the use of survey methodology or have focused on individual regions. In this paper we distribute gaming machine proceeds (GMP) from gaming venues to the surrounding localities in order to derive estimates of GMP per capita. It is hoped these estimates will enable the trusts who operate the electronic gaming machines (EGMs), and who are responsible for reinvesting a proportion of proceeds back into the community, to more accurately target funding towards the areas most affected by the harms of EGM gambling. Our estimates of GMP per capita also provide a means of assessing the criterion validity of the recently developed Dynamic Deprivation Index. Furthermore, although it is well known that Māori and Pacific Island populations have a higher incidence of problem gambling, our results imply that when controlling for socio-economic deprivation and the geographic location of EGMs the associations between ethnicity and GMP per capita are weak. From a policy perspective, this suggests the most effective way of limiting the harms of EGM gambling on these populations is to place tighter controls on the number of venues within their communities.     

关于学习本质的哲学探索

学习能力是人类传承文明的重要条件之一,也是人类智能的显著特征.但是关于人类是如何学习和学习的本质是什么,若干年来学者们一直没有定论.文章试图从哲学的视野对这一问题进行探索,通过对认知主义学习论、行为主义学习论以及建构主义学习论进行解读分析,试图得出关于学习本质研究的新进路.同时通过对人类学习本质研究的局限性引出了机器学习这个概念,从哲学角度对两者比较分析之后认为计算机仍是无法完全模拟或实现人类学习的.     

真、善、美:科学与艺术的共同本源及其在服饰上的体现

科学与艺术是人类文明的两大形态,也是人类对宇宙不断探索和创造性地加以认识的结果。它们都是以人为本,体现了人类对真、善、美的不懈追求。科学探索以追求“真”为动力,以造福人类即“善”为本源,而“美”视觉化地反映了真和善的这种当前状态;艺术是对生活本质规律的形象化揭示,是对“真”的表现和再现,是对“美”的追求的结果。艺术形象的启迪、认识、教育、审美和娱乐作用,在驱动欣赏者积极、向上、至善。因此,真、善、美分别是科学与艺术的艺同精神、终极目标和理想标准。三者在服饰上得到生动体现。