Clinical usefulness of the baby vision test in young children and its correlation with the Snellen chart

AIM:To investigate the efficacy of a new visual acuity(VA)screening method,the baby vision test for young children.METHODS:A total 105 eyes of 65 children aged 2-8y were included in the study.Acuity testing was conducted using a standardized recognition acuity chart(Snellen visual chart:at 3 m)and the baby vision model assessment.The baby vision device includes a screen,a near infrared camera and a computer.Children were seated at a measured distance of 33-40 cm from a display for testing.VA was estimated according to the highest resolution the children could follow.Decimal VA data were converted to logarithm of the minimum angle of resolution(logMAR)for statistical analysis.The VA results for each child were recorded and analyzed for consistency.RESULTS:The mean VA measured using the Snellen visual chart was 0.62±0.32,and that assessed using the baby vision test was 0.66±0.27.The 95%limit of agreement was-0.609 to 0.695,with 95.2%(100/105)plots within the 95%limits of agreement.VA values of the baby vision test were significantly correlated with those of the Snellen chart(R=0.274,P=0.005).CONCLUSION:The baby vision test can be used as a relatively reliable method for estimating VA in young children.This new acuity assessment might be a valid predictor of optotype-measured acuity later in preverbal children.

Exploring Variability in Sea Level at a Tide Gauge Station through Control Charts

Monitoring temporal changes in sea level is important in assessing coastal risk.Sea level anomalies at a tide gauge station,if kinematically conceived,include systematic variations such as trend,acceleration,periodic oscillations,and random disturbances.Among them,the non-stationary nature of the random sea level variations of known or unknown origin at coastal regions has been long recognized by the sea level community.This study proposes the analyses of subgroups of random residual statistics of a rigorously formulated kinematic model solution of tide gauge variations using X-bar and S control charts.The approach is demonstrated using Key West,Florida tide gauge records.The mean and standard errors of 5-year-long subgroups of the residuals revealed that sea level changes at this location have been progressively intensifying from 1913 to the present.Increasing oscillations in sea level at this locality may be attributed partly to the thermal expansion of seawater with increasing temperatures causing larger buoyancy-related sea level fluctuations as well as the intensification of atmospheric events including wind patterns and the impact of changes in inverted barometer effects that will alter coastal risk assessments for the future.

Japanese candlestick charts for diabetes

Continuous glucose monitoring(CGM)is a popular technology among the diabetic population,especially in patients with type 1 diabetes and those with type 2 diabetes treated with insulin.The American Diabetes Association recommends standardization of CGM reports with visual cues,such as the ambulatory glucose profile.Nevertheless,interpreting this report requires training and time for CGM to be cost-efficient.In this work it has been proposed to incorporate Japanese candlestick charts in glucose monitoring.These graphs are used in price analysis in financial markets and are easier to view.Each candle provides extra information to make prudent decisions since it reports the opening,maximum,minimum and closing glucose levels of the chosen time frame,usually the daily one.The Japanese candlestick chart is an interesting tool to be considered in glucose control.This graphic representation allows identification of glucose trends easily through the colors of the candles and maximum and minimum glucose values.

Modified DS np Chart Using Generalized Multiple Dependent State Sampling under Time Truncated Life Test

This study presents the design of a modified attributed control chart based on a double sampling(DS)np chart applied in combination with generalized multiple dependent state(GMDS)sampling to monitor the mean life of the product based on the time truncated life test employing theWeibull distribution.The control chart developed supports the examination of the mean lifespan variation for a particular product in the process of manufacturing.Three control limit levels are used:the warning control limit,inner control limit,and outer control limit.Together,they enhance the capability for variation detection.A genetic algorithm can be used for optimization during the in-control process,whereby the optimal parameters can be established for the proposed control chart.The control chart performance is assessed using the average run length,while the influence of the model parameters upon the control chart solution is assessed via sensitivity analysis based on an orthogonal experimental design withmultiple linear regression.A comparative study was conducted based on the out-of-control average run length,in which the developed control chart offered greater sensitivity in the detection of process shifts while making use of smaller samples on average than is the case for existing control charts.Finally,to exhibit the utility of the developed control chart,this paper presents its application using simulated data with parameters drawn from the real set of data.

VC++环境下利用MsChart控件对GPS数据的处理

Visual C++由于功能强大和应用灵活,同时得到Microsoft系统的最好支持,因此Visual C++经常用作串口通信开发工具。本文探讨如何将通过计算机串口接收来的GPS数据,利用MsChart控件进行处理。

TeeChart控件在实时检测系统上位机软件中的应用

为满足工业实时测控系统领域对数据分析处理的需要,需要在实时测控系统的上位机软件中开发实时曲线绘制和历史曲线绘制功能。介绍了图标类控件Tee Chart的功能特点和属性方法,说明了Tee Chart控件进行曲线功能开发的流程和方法。结合实际应用项目,在Visual Studio 2010编程环境下,实现了数据显示和处理功能,并给出了关键代码。Tee Chart控件具有功能强大、使用灵活的特点,非常适合实时测控系统中对数据曲线分析处理的需要。

JFreeChart在网络性能管理系统中的应用

性能数据图形的生成、显示、存储是网络性能管理系统的主要功能,也是网管人员操作的主要依据,因此该功能的实现在网管系统中是十分重要的一环。但是一般开发者通过自己设计的Java画图类做出的图形效果不是很好,通过介绍目前最好的Java图形解决方案——JFreeChart来解决此问题。JFreeChart基本能够生成各种各样的统计图。通过JFreeChart在网络性能管理系统中的应用介绍了JFreeChart如何生成、保存、打印图形的实现过程。

基于SSH与Highcharts整合架构的Web应用研究

当前广泛使用的Struts+Spring+Hibernate架构提供了低耦合、易维护的轻量级J2EE软件开发模型,可用来构建高质量的Web应用。为了解决当前设备管理中存在的设备标识不统一、信息化程度低等问题,实现设备的科学化管理,通过研究SSH架构及Highcharts技术框架,并以此为基础开发了设备管理支持系统。实验结果表明:SSH框架的使用不仅简化了系统的开发过程,同时也提高了系统的可扩展性和可维护性;而Highcharts是一个真正意义上的跨语言、兼容性强、实时显示的开源框架,在Web级图表创建方面具有较强的优势。

对用Chart控件的SetData函数绘制曲线图和散点图的研究与实现

本文主要介绍了Chart控件的一些基本属性 ,在VC ++中运用计算机图形学原理绘制二次曲线的一些方法以及如何使用Chart控件的SetData函数进行二维图形的绘制 ,并就用Chart控件绘图的精度问题进行了定量分析。

基于Shewhart Control Chart的生鲜乳中兽药残留风险预警方法研究

针对生鲜乳中兽药残留水平动态变化的特点,本研究探索构建一种基于历史数据的生鲜乳中兽药残留动态预警方法。基于Shewhart Control Chart理论,建立了兽药残留超标预警、检出率异常预警和平均值标准偏差预警方法。对中国某大型乳企的生鲜乳中氟甲喹和达氟沙星检测数据分析发现,无需触发风险预警,同时对假定出现的检出率异常和平均值异常预警情况进行了分析。

以Java2D与JFreeChart为平台的生产调度仿真与实现

在对现有生产制造车间的配置进行充分调查研究的基础上,根据生产制造中的特定需求,提出一种新的基于Java2D和JFreeChart技术的设计方法,设计相应的仿真系统;对生产调度的现实过程和项目计划的甘特图生成等方面,进行了有效的仿真设计和实现。仿真结果表明这种设计方法是有效的。

JFreeChart在Java Web项目中的应用

针对Web项目对图表技术的要求不断提高,介绍一种开源的基于Java技术的动态图表开发组件JFreeChart。结合某煤矸石热电厂管理信息系统,具体阐述了如何通过JFreeChart组件构建动态图表,为报表数据提供可视化、直观化的分析。

基于Chart控件的Web动态图表实现技术

微软公司基于.NET平台所开发的用于绘制动态图表的chart控件,具有功能强大,美观实用的特点。该文探讨了如何在Web系统中运用这一控件绑定图表的数据源、导出图表数据、处理数据系列以及绘制各类柱形图、圆饼图、雷达图等图表技术,为ASP.NET的Web系统中图形信息的显示、统计和分析提供了一种良好的解决方案。

CHARTS项目支持制定的我国艾滋病防治政策分析

目的:了解CHARTS对我国艾滋病防治政策环境的影响。方法:通过项目终期数据库,用文本分析法分析了国家级和省级艾滋病防治政策。结果:CHARTS在7年的时间里支持出台44项国家级和291项省级艾滋病防治政策。政策的颁布时间、颁布部门及政策内容涉及的领域,充分显示了项目对我国艾滋病防治环境的影响。结论:CHAR-TS为我国艾滋病防治政策环境的变化做出了贡献。

ASP中Chart统计图表的处理与实现

在WEB数据处理中常遇到统计图表的实现问题 ,通常的解决方法是自己编程生成动态图像或购买第三方组件。这里通过在ASP中调用MSChart图表控件 ,可以方便地实现ADO数据结果的统计图表处理 ,并可根据用户要求 ,实现不同类型图表的自由切换 。

基于JFreeChart技术的Web数据图表化表现

介绍一种开源的基于Java技术的动态图表开发组件JFreeChart,结合某高校教学水平评估数据统计系统,阐述了如何通过JFreeChart组件构建动态图表,为报表数据提供可视化、直观化的分析。

基于eCharts的动态统计图表绘制技术研究

eCharts是一个开源数据可视化工具,功能强大,具有易学易用、交互性强、定制灵活等优点。该文对ASP.NET开发环境下eCharts控件的动态统计图表绘制技术展开研究,结合AJAX技术针对其中的数据获取、图表参数设置、图表动态绘制等问题给出一套完整的编程模式,从而为各种Web应用中统计数据的可视化提供技术手段。

JFreeChart在金融数据统计与分析中的应用

阐述了JFreeChart组成及其基本功能,以开发某公司2007年度市场销售数据柱状图为例给出了基于JFreeChart组件进行开发的基本步骤,并给出了部分相关代码,实例应用表明,利用JFreeChart生成图表步骤简洁,可生成类型丰富的专业图表.

利用JfreeChart开发包绘制图表

用来开发可视化图表的开发包比较多,本文主要介绍如何利用计算机语言Java和目前功能相当强大的JfreeChart开发包来绘制各种各样图表,为数据分析处理的可视化提供一种可行的办法。

XML Schema数据到对象关系数据的转换——一种基于DOM-Chart模型的映射算法

讨论了基于模式驱动的XML Schema到对象-关系数据库模式映射,并给出了基本的映射规则和映射算法。在映射算法的设计中,先对DOM tree模型作适当修改并重新定义一种新的数据模型即DOM-Chart模型,使用新定义的这种模型简化了映射的处理过程。使用完全支持SQL:1999标准并具备面向对象特征的DBMS Oracle9i Release 2作为后台数据库,采用JDOM作为XML文档的编程接口,使用JAVA语言对论文中描述的算法进行了验证。实验结果表明该算法简单有效,由该映射得到的对象-关系模式保留了XML Schema的语义信息和结构信息,同时也引入了面向对象的数据类型和特征。