Affective association with and preference for flexible brace colors in older adults with spinal deformities

Patients with adult spinal deformities, often suffer from the physical shortcomings of rigid braces and psychological hurdles of traditional rigid bracing treatment. The color of flexible braces is a physical element that influences user perception and treatment acceptance. This study aims to investigate the affective valence and preferences of patients with adult spinal deformities toward contextless colors and flexible brace colors, respectively, then understand their color requirements of flexible braces in terms of the color attributes (lightness and chroma). A total of 32 Chinese participants with adult spinal deformities (25 females and 7 males aged 61.9 ± 4.16) participated in the study. Participants are required to score 36 contextless and brace colors using the affective appraisal scale and the colors are measured using spectrophotometer. The experimental results showed that context is an important factor in influencing the affective perception but not the color preferences of participants. Adult spinal deformities patients have a more positive affective connotations toward the brace color with lighter achromatic shades. This study provides new insights for the choosing of colors during the design process of medical orthoses.     

整体叶轮机器人研磨柔顺控制研究

针对目前整体叶轮人力手工研磨过程中研磨品质差、出产周期长、工人健康危害大等问题,开发了一套基于六自由度库卡工业机器人的自动研磨控制系统.机器人末端夹持气动磨机贴合整体叶轮表面,利用六维力传感器反馈受力情况,结合在线恒力控制算法搭建复杂曲面机器人研磨恒力控制系统.根据机器人运动学理论,对机器人研磨过程中末端加工工具重力干扰进行补偿;建立机器人力/位置混合柔顺控制策略,采用传统PID控制策略进行基础力控制,采用模糊自适应PID控制策略进行优化力控制实现机器人自动研磨.对整体叶轮进行研磨实验,结果表明模糊自适应PID控制算法可以有效的实现机器人的柔顺控制,保持研磨过程接触力在有效范围内.     

基于PLC的食堂燃气泄漏监控系统的实现

某大型食堂的燃气泄漏监控系统采用SIEMENS公司的S7-200系列CPU 224CN为控制器,配合功能扩展模块EM231和ES2000T-C催化接触式可燃气体探测器,实现燃气泄漏的检测和供气阀门的连锁控制。配置的TD400C文本显示屏实时显示各关键测点的燃气浓度,并实现参数设置和报警控制等人机交互功能。     

Effect of Low-Pressure Plasma Exposure on the Storage Characteristics of Brown Rice

Food and Bioprocess Technology - In the present study, the use of nonthermal plasma for the treatment of brown rice was pioneered with the aim to maintain the quality during storage and its...     

Geometric algorithm for point projection and inversion onto Bézier surfaces

This paper presents an accurate and efficient method for the computation of both point projection and inversion onto Bézier surfaces. First, these two problems are formulated in terms of solution of a polynomial equation with u and v variables expressed in the Bernstein basis. Then, based on subdivision of the Bézier surface and the recursive quadtree decomposition, a novel solution method is proposed. The computation of point projection is shown to be equivalent to the geometrically intuitive intersection of asurface with the u-ν plane. Finally, by comparing the distances between the test point and the candidate points, the closest point is found. Examples illustrate the feasibility of this method.     

无色透明耐高温聚酰亚胺膜材料的研究进展

综述了无色透明耐高温聚酰亚胺(PI)膜材料的应用、国内外研究进展和分子结构设计方法.首先,介绍了PI膜材料在微电子及光电产业的应用,以及国内外对无色透明耐高温PI的研究现状.从分析PI有色原因及影响因素入手,阐述了目前制备无色透明PI膜材料的主要分子结构设计方法:引入含氟取代基、主链引入脂环结构、非共平面结构、间位取代二胺、引入砜基等.此外,在使PI无色透明化的同时,为了不牺牲PI优良的耐热性,与适量无机纳米组分复合也是一个可行的设计手段.     

3．0mm×485mm热轧窄带钢的开发

介绍了唐山不锈钢有限责任公司450mm生产线成功开发3．0mm×485mm碳素结构热轧窄带钢新产品的过程。     

Bi-capon beamforming for MIMO radar based on rank-reduced correlation matrix

A bi-capon beamforming (BCB) algorithm for multi-input multi-output (MIMO) radar is developed on the basis of correlation domain. By vectorizing the echo matrix and its transpose, the conventional capon cost function is transformed into bi-capon quadratic functions. By calculating two lower dimensional weight vectors with sub-matrices of the correlation matrix, BCB can significantly decrease the computational complexity and the requirement of training samples. In the presence of short data records, BCB can achieve better interference suppression performance than fully adaptive capon algorithm. Simulation results are presented to demonstrate the effectiveness of the proposed method.     

浅析电视频道包装的个性化

从频道包装的视觉识别角度来着重分析影响电视频道包装个性化的因素。通过案例、图示、对比的方式,详细论述了色彩配置、画面风格、运动方式、声音、字体,对电视频道包装个性化的影响。     

索风营发电厂事故照明系统的改造

事故照明系统作为发电厂紧急状态下的应急设备，其重要性不言而喻。事故照明就其本身系统结构来说较为简单，属于容易被忽视的设备类型，但其作用的失去可能会严重影响到发电厂的安全生产。本文从索风营发电厂1次事故照明的故障为例，阐述了该厂事故照明系统存在的隐患及其缺陷，并针对问题提出了对此事故照明系统的改造方案供大家参考。