Colour size illusion on liquid crystal displays and design guidelines for bioinformatics tools

Although the influence of colour on size perception has been known for a century, there is only limited research on interventions that can reduce this effect. This study was therefore undertaken in order to identify appropriate interventions and propose design guidelines for information visualisation, especially in applications where size judgement is critical. The colour size illusion was replicated on an LCD monitor, revealing that yellow images appeared the smallest among a series of red, yellow, green and blue images on a white background. Three types of interventions (background brightness, border colour and background grid brightness) were tested to identify conditions that reduce the colour illusions, but none proved to be statistically significant. Based on these experimental results and an extensive literature survey, a set of design guidelines is proposed to enhance the usability of LCD monitors and a set of design recommendations given to extend these guidelines to applications in the field of bioinformatics. These design recommendations are accompanied by an evaluation of effectiveness obtained by interviewing domain experts.     

横向剪切和旋转惯性影响下管道内流动液体的小振动

当考虑旋转惯性的影响时,流经管道横截面的液体在剪切作用下,会产生小振动.本文推导出无量纲参数表示的系统微分方程.对于某些问题的确定值,使用Galerkin方法,可以得到主振动频率和临界速度.在此基础上,还将研究结果和经典理论值进行了比较.     

A successful case of hydrocarbon dew point analysis during mixing of natural gases in transmission pipeline

The occurrence of liquid condensation in natural gas accounts for new challenges during the interoperability between transmission networks,where condensation would lead to higher pressure drops,lower line capacity and may cause safety problem.A successful case of hydrocarbon dew point （HCDP） analysis is demonstrated during the mixing of natural gases in the transmission pipeline.Methods used to predict the HCDP are combined with equations of state （EOS） and characterization of C6＋ heavy components.Predictions are compared with measured HCDP with different concentrations of mixed gases at a wide range of pressure and temperature scopes.Software named ＂PipeGasAnalysis＂ is developed and helps to systematic analyze the condensation problem,which will provide the guidance for the design and operation of the network.     

天然气管道氮气置换过程混气段数值模拟

通过建立管道模型,给定边界条件,在Fluent软件中进行求解器设置后,运用组分输运模型模拟分析了氮气置换过程中混气段的特性。由分析得到：入口处混气头形状随入口速度增大由“直线”形状过渡到“子弹头”形状;在速度方向上,混气段氮气体积分数沿管道轴线呈线性规律递减,随着时间延长,扩散范围不断变大;氮气置换速度随着入口流速的增加而增大,置换初期,混气段长度增长速度快,大于置换后期;管道置换长度随时间增加而增大,置换速度越快,管道置换长度增长越快,管道置换效率随着流速的增加而增大,但是增长率呈下降趋势。     

基于层次分析法和模糊评价的城市燃气管网安全研究

本文结合层次分析法与模糊评价法对城市燃气管网的安全因素进行了综合评价．结合具体例子说明此评价方法的有效性与可行性．     

广西金牙金矿毒砂 Re-O s同位素测年和硫同位素示踪

金牙金矿的载金矿物主要为毒砂,次为含砷黄铁矿。毒砂矿物结构均一,为主成矿阶段热液成因,相较于成因复杂的环带状含砷黄铁矿更适合于同位素测年和示踪。通过对该矿床毒砂的单矿物Re-Os同位素测年和S同位素分析,获得Re-Os等时线年龄为（206±22）Ma,反映金矿形成于晚三叠世末期,大致相当于印支期挤压造山向燕山期拉伸的构造转换期。毒砂δ34 S值为-9‰～-3.9‰,平均值为-5.3‰,具有沉积硫的特征,推断硫来自地层,成矿流体为盆地建造水。由此认为金牙金矿是一个与盆地流体和沉积物有关的后生热液矿床。     

A miniature liquid helium temperature JT cryocooler for space application

Along with the development of space science and technology,miniature liquid helium temperature long life cryocooler is a focus subject in cryogenic study.Since it is the precondition of space detection researches,institutions of space in many countries do the research on it.In this article,we designed a compound cooling system.A three-stage high frequency thermal coupled pulse tube cryocooler was used to precool a Joule-Thomson(JT)cryocooler.This system has no moving parts at low temperatures and is hence suitable for space operation.Liquid helium temperature was successfully achieved in both open loop and closed cycle experiments.In the closed cycle experiment,when 473 W electric power was inputted,the cooling system reached a no-load temperature of 4.4 K,and a cooling capacity of 11.6 mW was provided at 4.54 K.It is the first miniature liquid helium temperature JT cryocooler in China and the research achievement paves a way for the space application of ultra-long wave infrared detection and THz technologies.     

钢桁架连梁-联肢剪力墙耗能机理及抗震性能试验研究

对设置全钢桁架连梁和设置钢筋混凝土、钢桁架混合连梁的双层联肢剪力墙平面结构进行了拟动力试验和低周反复荷载试验,研究了不同工况地震波作用下剪力墙的时程响应,以及其破坏机理、承载力、滞回延性性能、耗能机理、刚度及强度退化机理。试验结果表明：全部设置钢桁架连梁的剪力墙的刚度分布合理,耗能机理及刚度强度退化机理符合联肢剪力墙抗震设计的要求。大震时,在保证较高耗能能力的同时能够维持较高的承载力和刚度,持续约束墙肢,抗震性能优于混凝土连梁联肢剪力墙体系,是一种较理想的连梁设置方案。     

非开挖技术在市政管网工程中的应用研究

随着城市建设的不断发展,非开挖技术以其施工负面影响较小、所占场地较少、对道路交通及人们正常生活影响较微弱等优势得以迅速发展.以顶管法为例,介绍非开挖技术工作机理及其在市政管网工程中的应用,并在此基础上提出了非开挖技术所面临的困难,如非开挖技术标准和规范尚不完善,直接可观察性较差,以及存在建设风险隐患等,最后对其发展前景进行了展望.     

新型基因枪微弹材料可行性初步研究-Ⅰ

基因枪在未来临床基因转导中很有前途,但目前所用微弹材料金、钨都属于重金属,其长期存在于人体的安全性尚无法估计。提出用羟基磷灰石(HAP)微粒来代替金或钨微粒,从理论上推导了这种取代的可行性,并报告了一种HAP微粒的制备及其负载DNA的研究结果。理论推导完全按照物理学方法进行。实验部分的方法:将稳定剂H以一定速度和比例滴入一定浓度的Ca(H2PO4)2溶液中,再按照一定的速度和比例滴入Ca(OH)2饱和溶液,期间或完成后超声处理一定时间,将所得HAP微粒溶液与亚精胺和DNA以一定比例和浓度在一定pH条件下混合。结论:所得HAP粒径值符合要求,并且能够高效负载DNA。