Testing usability and trainability of indirect touch interaction: perspective for the next generation of air traffic control systems

This study aims to determine whether indirect touch device can be used to interact with graphical objects displayed on another screen in an air traffic control (ATC) context. The introduction of such a device likely requires an adaptation of the sensory-motor system. The operator has to simultaneously perform movements on the horizontal plane while assessing them on the vertical plane. Thirty-six right-handed participants performed movement training with either constant or variable practice and with or without visual feedback of the displacement of their actions. Participants then performed a test phase without visual feedback. Performance improved in both practice conditions, but accuracy was higher with visual feedback. During the test phase, movement time was longer for those who had practiced with feedback, suggesting an element of dependency. However, this ‘cost’ of feedback did not extend to movement accuracy. Finally, participants who had received variable training performed better in the test phase, but accuracy was still unsatisfactory. We conclude that continuous visual feedback on the stylus position is necessary if tablets are to be introduced in ATC.     

主成分分析法神经网络及其在瑞培林片剂测定中的应用

介绍了主成分分析法神经网络的基本原理，对瑞培林片剂进行了测定，回收率令人满意，讨论了此法在复方制剂多组分同时测定中的优越性，并研究了网络拓扑结构、学习速率等对结果的影响。     

电子病历在移动医疗中的研究与发展

随着移动医疗在医院的广泛应用,医生迫切需要能够在病人床边通过iPad等智能平板设备查看、检索病人的电子病历信息,以提高诊疗效率并使查房过程更为准确、安全。但是由于现有的电子病历系统客户端多是基于Windows平台,如何支持在智能平板设备上访问电子病历系统成为移动医疗领域亟待解决的问题。本文系统地介绍这一崭新领域的基本概念,详细阐述需要解决的几个关键问题,比较几种主流解决方案的异同,最后对未来研究方向和工作进行展望。     

认识全色密度计在射线检测中的作用

由国家计量部门相关政策变更所引发的一系列问题,给射线检测结果带来诸多变数,也直接影响到检测的质量。启用兰片基标准密度片奖有助于广大密度计用户及时发现问起,并找到解决问题的好方法。     

Quality perception when streaming video on tablet devices

The proposed work aims at analyzing the quality perceived by the user when streaming video on tablet devices. The contributions of this paper are: (i) to analyze the results of subjective quality assessments to determine which Quality of Service (QoS) parameters mainly affect the users’ Quality of Experience (QoE) in video streaming over tablet devices; (ii) to define a parametric quality model useful in system control and optimization for the considered scenarios; (iii) to compare the performance of the proposed model with subjective quality results obtained in alternative state-of-the-art studies and investigate whether other models could be applied to our case and vice versa.     

激光超声波无损检测片剂硬度方法的研究

为了清楚地了解片剂的硬度与超声波速度之间的关系,利用激光照射到片剂上,通过测定出反射的声表面波速度,且对实验数据进行分析,从而得出片剂的硬度与声表面波速度之间的关系曲线。实验结果表明,随着片剂硬度的增加,反射的声表面波速度会减小。因此在片剂无损检测或在线快速检测等方面会有一定的研究价值。     

Effect of Kollidon VA®64 particle size and morphology as directly compressible excipient on tablet compression properties

The study evaluates use of Kollidon VA^®64 and a combination of Kollidon VA^®64 with Kollidon VA^®64 Fine as excipient in direct compression process of tablets. The combination of the two grades of material is evaluated for capping, lamination and excessive friability. Inter particulate void space is higher for such excipient due to the hollow structure of the Kollidon VA^®64 particles. During tablet compression air remains trapped in the blend exhibiting poor compression with compromised physical properties of the tablets. Composition of Kollidon VA^®64 and Kollidon VA^®64 Fine is evaluated by design of experiment (DoE). A scanning electron microscopy (SEM) of two grades of Kollidon VA^®64 exhibits morphological differences between coarse and fine grade. The tablet compression process is evaluated with a mix consisting of entirely Kollidon VA^®64 and two mixes containing Kollidon VA^®64 and Kollidon VA^®64 Fine in ratio of 77:23 and 65:35. A statistical modeling on the results from the DoE trials resulted in the optimum composition for direct tablet compression as combination of Kollidon VA^®64 and Kollidon VA^®64 Fine in ratio of 77:23. This combination compressed with the predicted parameters based on the statistical modeling and applying main compression force between 5 and 15?kN, pre-compression force between 2 and 3?kN, feeder speed fixed at 25?rpm and compression range of 45–49?rpm produced tablets with hardness ranging between 19 and 21?kp, with no friability, capping, or lamination issue.     

无糖片糖的研制

本文探讨了无糖片糖各因素的影响及最佳工艺参数。结果表明:决定无糖片糖硬度的主要因素为糖醇的粒度与压片机的压力,颗粒目数和压力大小均与硬度成正比且影响显著,其次为物料混合时间长短和润滑剂添加量,而抗粘剂的添加量对产品硬度影响不显著。     

炭黑分散度检测标准GB/T 18251应用过程中遇到的问题浅析

主要对GB/T 18251—2019《聚烯烃管材、管件和混合料中颜料或炭黑分散度的测定》标准中给出的炭黑分散度检测过程中试样厚度范围、厚度测量方法及切片法中试样形状、试样幅宽、试样制备过程中遇到的问题做了讨论研究。试样厚度是制备试样的一个重要参数,标准中未给出具体测量方法,应予以补充,建议采用显微镜测量法。标准中给出的炭黑分散度试样厚度范围（20±10）μm不合适,实际检测过程中发现能用于试验的试样厚度小于10μm。标准中未给出切片法制备试样的形状和幅宽,建议使用正方形试样,幅宽4 mm,切片过程中可能会遇到无法切到指定厚度范围的试样,可以采用低温冷冻后再切样的办法解决。     

护肝片改薄膜包衣生产工艺研究

为了解决糖衣片在临床使用中出现的问题,改变了包衣工艺,建立了护肝片薄膜包衣的最佳工艺条件并考察其稳定性。将护肝片的包衣工艺由糖衣改为薄膜衣,通过正交试验确定护肝片薄膜包衣的最佳包衣液浓度、喷量、喷雾风速温度,并用加速试验法和室温留样考察其稳定性。在包衣液浓度为13%、包衣液喷速为140 g/min、进风温度为75℃的条件下生产的薄膜衣片质量最佳,且按2010药典检验其稳定性合格。结果表明,此制备工艺稳定,可用于护肝薄膜衣片的工业生产。