浅谈毕加索拼贴画风格对现代招贴设计的影响

毕加索创造了拼贴画风格,这种风格的影响一直延续到了现在,现代的招贴设计也大量地使用了毕加索的拼贴画风格。其中日本平面大师原研哉是最有名的设计师之一,其作品代表了未来招贴设计的一种发展趋势。本文就是想通过研究毕加索的拼贴画风格来对未来的招贴设计提出一些启示。     

手机产品交互设计与用户体验探析

运用交互设计和用户体验的基本概念、产品交互系统组成图解、用户体验四元素,结合手机产品设计的用户调查和列表分析,获得了手机产品交互设计和用户体验的最终评价,通过这一比较和探析的过程证明,交互设计是未来设计尤其是工业产品设计的努力的方向和目标,用户体验是设计的终极参照。     

浅析国产动画创作中的突破与传承

近年来,国产动画产业成长迅速,日益朝着产业规模化的方向发展,然而在动画艺术的创作上却始终找不到准确的定位,无法突破瓶颈。本文试从动画电影的内容与形式两方面进行分析,探索一条适合中国动画发展的道路,提出了结合贴近现代社会生活的题材与符合中国传统审美意识的艺术形式的创作理念。     

基于HL-2M 装置的等离子体可见光成像诊断系统的研制

HL-2M 托卡马克初始等离子体放电实验对等离子体可视化诊断有一定的需求,其中可见光成像系统为关键诊断之一,对初始等离子体放电有着十分重要的作用。本研究以HL-2M为平台设计研发了一套可见光成像诊断采集系统,本系统具有切向与广角两套成像诊断,可以直观准确地分析放电过程中的等离子体演化,包括等离子体击穿、维持、破裂和等离子体与壁相互作用等物理现象。系统的两套诊断通过镜头与传像光纤束进行等离子体可见光辐射的成像与传输,并以Lumenera Lt425C相机为采集和控制核心。以远程服务器控制本地并传输至数据库为控制模式,控制软件采用了VC++的多线程技术以及OpenCV软件库的图像处理技术,能够进行实时的可见光图像采集,并在放电结束后进行图像回放,同时系统具备色彩校准标定可以在装置复杂情况还原装置真实运行状态,系统具备参数配置功能,支持炮间更改参数,适应各种情况的物理实验,并有着一定的可移植性。本系统的开发研制可以满足HL-2M 装置初始等离子体放电期间的运行基本要求,在HL-2M初始等离子体放电期间取得了良好的效果,为后续推广至其他的装置提供了解决方法。     

A revisit to stochastic near-optimal controls: The critical case

This paper revisits the stochastic near-optimal control problem considered in Zhou (1998), where the stochastic system is given by a controlled stochastic differential equation with the control variable taking values in a general control space and entering both the drift and diffusion coefficients. A necessary condition of near-optimality is derived using Ekeland’s variational principle, spike variation techniques, and some delicate estimates for the state and the adjoint processes. We improve the error bound of order from “almost” ${\epsilon }^{\frac{1}{3}}$ in Zhou (1998) to “exactly” ${\epsilon }^{\frac{1}{3}}$.     

Usability of a cloud-based collaborative learning framework to improve learners’ experience

Computer-Supported Collaborative Learning (CSCL) is concerned with how Information and Communication Technology (ICT) might facilitate learning in groups which can be co-located or distributed over a network of computers such as Internet. CSCL supports effective learning by means of communication of ideas and information among learners, collaborative access of essential documents, and feedback from instructors and peers on learning activities. As the cloud technologies are increasingly becoming popular and collaborative learning is evolving, new directions for development of collaborative learning tools deployed on cloud are proposed. Development of such learning tools requires access to substantial data stored in the cloud. Ensuring efficient access to such data is hindered by the high latencies of wide-area networks underlying the cloud infrastructures. To improve learners’ experience by accelerating data access, important files can be replicated so a group of learners can access data from nearby locations. Since a cloud environment is highly dynamic, resource availability, network latency, and learner requests may change. In this paper, we present the advantages of collaborative learning and focus on the importance of data replication in the design of such a dynamic cloud-based system that a collaborative learning portal uses. To this end, we introduce a highly distributed replication technique that determines optimal data locations to improve access performance by minimizing replication overhead (access and update). The problem is formulated using dynamic programming. Experimental results demonstrate the usefulness of the proposed collaborative learning system used by institutions in geographically distributed locations.     

基因和排列熵在阿尔茨海默病早诊中的研究应用

由于阿尔茨海默病（Alzheimer’s Disease,AD）发病率高且不可逆,所以AD早诊尤为重要。已有研究发现AD患者与载脂蛋白E（Apolipoprotein E,APOE）有关,复杂度也有变化。可将复杂度用于AD诊断中,但其分类性能有待进一步提高。以排列熵（Permutation Entropy,PE）为指标,探讨了不同基因型的AD患者复杂度变化模式,研究了APOE载体的正常对照组（Normal Control,NC）、早期轻度认知损害（Early Mild Cognitive Impairment,EMCI）、晚期轻度轻度认知损害（Later Mild Cognitive Impairment,LMCI）和AD与未携带者脑信号复杂度的差异,提取显著差异脑区的PE值作为特征向量,根据基因型分别训练不同的分类器。结果表明,加上基因信息后可以96.67%的准确率区分EMCI与NC,且EMCI与LMCI的分类正确率由40.35%提高到88.24%,显著提高了AD早诊的正确率。     

STM32的智能温室控制系统

针对目前温室大棚自动化程度低且不易连栋管理的现状,本文设计了以ST公司的STM32单片机为核心的智能温室控制系统。介绍了控制系统的硬件组成及工作原理,同时给出了软件流程图,该系统采用CAN总线技术对连栋大棚的主要环境因子,如温度、湿度及光照度等进行智能控制,且通过串行通信实现上位机控制,增强了温室大棚的智能化和实用性。     

Recovering the initial state of an infinite-dimensional system using observers

Let A be the generator of a strongly continuous semigroup T on the Hilbert space X, and let C be a linear operator from D(A) to another Hilbert space Y (possibly unbounded with respect to X, not necessarily admissible). We consider the problem of estimating the initial state z₀∈D(A) (with respect to the norm of X) from the output function y(t)=CT_tz₀, given for all t in a bounded interval [0,τ]. We introduce the concepts of estimatability and backward estimatability for (A,C) (in a more general way than currently available in the literature), we introduce forward and backward observers, and we provide an iterative algorithm for estimating z₀ from y. This algorithm generalizes various algorithms proposed recently for specific classes of systems and it is an attractive alternative to methods based on inverting the Gramian. Our results lead also to a very general formulation of Russell’s principle, i.e., estimatability and backward estimatability imply exact observability. This general formulation of the principle does not require T to be invertible. We illustrate our estimation algorithms on systems described by wave and Schrödinger equations, and we provide results from numerical simulations.     

瞬间永恒——天津国庆彩车展演服装设计中的思考

人物展演服装设计,是天津国庆彩车整体设计系统中的重要组成部分。文章从主题设计、意象表现与造型特点等角度分析了天津国庆彩车中展演服装设计的特质与创意点,指出展演服装设计的关键在于准确定位,并以服装设计独特的艺术语言表述其它设计元素所不能表达的语意内涵。