麻醉机是临床手术实施急救的必备设备,如果其性能不可靠,可能会严重威胁患者的生命安全,目前河南省内还没有麻醉机计量技术规范.通过对麻醉机主要组成及工作原理和检测用标准器的分析介绍,依据JJF 1234-2018、GB 9706.29-2006、YY 0320-2000等相关文献,结合国内其他省市麻醉机计量技术规范,同时考虑麻醉机检测的实际要求,文章确定6个项目作为检测项目,建立麻醉机性能检测方法.通过对四台不同型号的麻醉机进行验证实验,验证结果符合检测要求.建立的麻醉机性能检测方法科学合理,能够较为全面的评判一台麻醉机的性能,提高麻醉机的可靠性和安全性,减少其临床使用风险.

文章根据氡的特点及相关标准研究建立一套标准氡室,包括氡源、主体箱、氡浓度控制系统、温湿度控制系统、监测系统及自动控制系统.对标准氡室进行8h氡气稳定性试验、氡室内氡气活度均匀性试验、氡室内氡气多个浓度点调控测试,实验证明氡气8h稳定性相对标准偏差为2.16％,氡气活度均匀性相对偏差为3.6％,满足JJG 825-2013测氡仪检定规程对标准氡室的要求.

X射线探伤机被广泛应用于各行业的工业探伤,但因长期频繁的现场作业致使很多射线探伤机的辐射角有偏移,遗留安全隐患。本文设计的X射线探伤机检定平台配合0.6cm3电离室能完成X射线束（-400400）mm的扫描范围,能完成X射线探伤机辐射角、辐射束重复性等参数的自动测量,为X射线探伤机的量值传递提供了技术支持,为工业探伤提供了计量基础。

当物体厚度方向尺寸变化较大时,其DR(Digital Radiography)图像动态范围与对比度较低,影响对缺陷的识别与检测.针对此问题本文设计一种基于Retinex原理的图像增强改进算法,针对传统的Retinex算法存在的光晕现象进行研究,采用引导滤波代替高斯滤波对照射分量进行估计.通过对比实验,可知对于不同的被检测物体,本文提出改进的增强算法相对于已有方法具有更明显的增强作用.改进算法可以使得原图中内部无法看见的细节信息被凸显出来,能有效解决样品DR图像动态范围小的问题.

为充分了解新建立的γ射线标准辐射场剂量分布特性,对辐射场剂量分布进行测试与修正分析研究。在两个测量点之间的距离远远小于源探距的情况下,忽略空气衰减的影响,计算出源探距误差,对源探距进行修正,降低了测量值和理论值的相对误差,也解决了测量值高于衰减规律计算的理论值的问题;在源探距已做修正的前提下,做空气衰减修正,修正后的测量值与理论值的相对误差在1%以内。源探距修正和空气衰减修正是进行辐射场剂量分布特性分析的有效方法。

为推进X射线空气比释动能量值传递的工作,实验室建立中能X射线参考辐射装置.通过实验测量和插值计算,建立符合ISO4037-1标准的X射线辐射质,建立的辐射质与ISO4037国际标准的相对偏差在5％ 以内,满足ISO4037-1的要求.

图像特征点匹配作为图像处理领域的一项基本技术,在临床医学图像处理中具有很重要的意义.本文根据医学图像的特点提出一种基于双向异步投票策略的特征点匹配方法.首先,利用改进的harris角点检测算子提取图像角点作为图像的特征点;其次,采用本文提出的基于双向异步的投票策略的角点匹配算法完成角点的粗匹配,使待拼接图像的特征点大致对应;最后利用RANSAC优化算法剔除误匹配,使特征点达到精确匹配.

图像特征点匹配作为图像处理领域的一项基本技术,在临床医学图像处理中具有很重要的意义,本文根据医学图像的特点提出一种基于双向异步投票策略的特征点匹配方法.首先,利用改进的harris角点检测算子提取图像角点作为图像的特征点;接着,采用本文提出的基于双向异步的投票策略的角点匹配算法来完成角点的粗匹配,使待拼接图像的特征点大致对应;然后利用RANSAC优化算法剔除误匹配,使特征点达到精确匹配.

为高精度测量建筑材料的放射性，设计一款多道g能谱仪采集分析系统，由中国计量科学研究院提供的混和标准源及点源进行检测，测试结果显示该测量系统的测量不确定度远小于20％（k＝3），满足国家标准的相关要求。

Objective:To improve the image quality and the precision of the corner using the MSR algorithm,then to improve the efficiency and precision of the image registration and stitching using the corner extracted.Methods:Firstly,the modified MSR algorithm,which was proposed in this paper,and is based on the model of human visual perception to brightness and color,was employed to enhance and filter the image,then the corners were extracted from the image processed using the modified harris algorithm.Results:An X-ray image downloaded from the COX web site was processed by our algorithm.The entropy of the untreated and treated image was 4.3706 and 7.3817,respectively,the quality of the enhanced image is improved obviously,and the phenomenon of corner crowding is avoided effectively,and it makes corner location more precisely.Conclusions:Our experimental results show that the quality of the image processed by our algoritnm can be greatly improved and the corners in the image can be extracted effectively and precisely.

Objective: To assist the general population aware of their physical condition during sleep,the paper designed a family-measuring system of sleep.Methods: The system collects and processes Physiological parameters: breathing,pulse,oxygen saturation.To diagnose apnea syndrome by AHI;Software was developed on the platform of VC + +6.0.Results: The system is accurate about the physiological parameters and reliable,by measuring a male healthy volunteer.Conclusion: The system is easy to use,reliable,etc.,and can facilitate public understanding of physical condition during sleep.

For maintaining the health and function of lake ecosystem,it is necessary to manage the lake ecosystem based on the lake-specific environmental condition.Lake ecological sensitivity analysis can quantify the ecological function partitions,which is helpful for the lake ecosystem management.Based on ecological investigation of the lake environment,ecological sensitivity in Futou Lake was evaluated by selecting regional representative factors,utilizing the advanced GIS technology and using the model of multi-factor summation with different weight.The results showed that about 32.0% of the study area was extreme and high sensitivity zones,and about 57.1% of the study area was moderate sensitivity zones,which indicated that the lake had a relatively high sensitivity.The advices of protection and utilization for these zones were suggested based on the spatial distribution of ecological sensitivity and importance of service.This study firstly applied GIS technology to assess the lake ecological sensitivity,making the spatial overlay of ecological factors effectively.At the same time,this article suggested that selecting additional factors such as aquatic biodiversity,biomass and other factors as the indicators could understand ecological sensitivity more comprehensively.

ADHD is one of the commonly diagnosed diseases of children,which will have adverse effects on children's growth.Despite the progress in the assessment,diagnosis,and treatment of children and adults with ADHD,the diverse and conflicting opinions about ADHD have resulted in confusion for families,care providers,educators,and policymakers.The courses and identifying methods of ADHD are introduced,and the options of the common treatment are also described briefly in this paper.At last,an effective but up to now not well-known therapy,the EEG-based Biofeedback therapy,including its principle,technology,and operations is delineated in this paper.

Biological invasions is one of the three most pressing environmental problems.The invasion of alien animal has caused biodiversity loss,ecological environmental damage and economic losses of China. But to our knowledge,factors influencing regional spatial patterns of these alien animals have not been studied in China,although China is a country heavily infested with these species.Thus,it is very important to clarify the pattern of spatial distribution and the influencing factors of invasive alien animals for further prediction and management.In order to explore the relationship between spatial patterns of invasive alien animals and environmental and anthropological factors,multiple stepwise regression and canonical correspondence analysis were used to determine the effects of environmental variables(including annual precipi-tation,mean temperature in January,mean temperature in July,annual mean temperature,area of province,latitude,longitude and percentage of forest cover)and anthropological factors(including total population,population density,values of annual gross production,GDP on unit area,GDP per capita,values of imported goods,number of foreign tourists and total of transport)on the number,density and spatial distribution of invasive alien animals of China.Results showed that there were 136alien invasive animals recorded in Chi-na,among which insect was accounted for 56.6%.The invasive animals of China were mainly in the unin-tentional ways,accounting for 53.6%of the total invasive animal number.The results indicated that the number of invasive alien animals decreased from the southeast to the northwest,which was largely determined by latitude.Also,the density of invasive alien animals decreased from the southeast to the northwest,which was largely determined by the population density.Our study suggested that latitude and the population density were the main factors that significantly affected the spatial pattern of invasion alien animal at regional and local scale,respectively,in China.These findings may have important implications for the management of invasive animals.