Diagnostic Measures of Influence for s2

We present three intuitive diagnostic measures for judging the influence that single or multiple observations exert on the estimate s², the mean square error. The three measures are shown to be equivalent statistics. We discuss distributional properties of these measures and conclude with an example.     

Ex vivo thickness measurement of cartilage covering the temporomandibular joint

Articular cartilage covers the temporomandibular joint (TMJ) and provides smooth and nearly frictionless articulation while distributing mechanical loads to the subchondral bone. The thickness of the cartilage is considered to be an indicator of the stage of development, maturation, aging, loading history, and disease. The aim of our study was to develop a method for ex vivo assessment of the thickness of the cartilage that covers the TMJ and to compare that with two other existing methods. Eight porcine TMJ condyles were used to measure cartilage thickness. Three different methods were employed: needle penetration, micro-computed tomography (micro-CT), and histology; the latter was considered the gold standard. Histology and micro-CT scanning results showed no significant differences between thicknesses throughout the condyle. Needle penetration produced significantly higher values than histology, in the lateral and anterior regions. All three methods showed the anterior region to be thinner than the other regions. We concluded that overestimated thickness by the needle penetration is caused by the penetration of the needle through the first layer of subchondral bone, in which mineralization is less than in deeper layers. Micro-CT scanning method was found to be a valid method to quantify the thickness of the cartilage, and has the advantage of being non-destructive.     

宝乐安联合金酸萍颗粒对新生儿黄疸的治疗

目的 观察宝乐安联合金酸萍颗粒对新生儿黄疸的临床疗效。方法 选择我院和酒泉市人民医院2016年10月至2018年9月间诊治的86例新生儿黄疸患儿为研究对象。入选患儿随机分成对照组与试验组各43例。其中对照组患儿给予金酸萍颗粒治疗,试验组患儿给予金酸萍颗粒联合宝乐安治疗。对两组患儿的临床治疗效果进行评价比较。结果 试验组与对照组患儿的临床治疗总有效率分别为95.3%和81.4%,差异有统计学意义(χ~2=9.385,P0.05)。试验组患儿胆红素恢复正常时间以及黄疸消失时间均显著短于对照组,差异有统计学意义(均P0.05)。结论 宝乐安与金酸萍颗粒联合用药对新生儿黄疸的临床疗效优于单用金酸萍颗粒,值得推广。     

基于GIS的湖北省森林生态系统定位观测研究网络规划

森林生态系统定位观测研究站可为森林经营和生态效益评估提供基础数据。以湖北省为例,设计森林生态系统定位观测研究网络的指标体系,基于球状模型进行普通克里格插值,与GIS的空间叠置分析相耦合,生成湖北省生态地理区划和生态功能区划;建立森林生态站网络规划的有效分区,进行森林生态站站点布设,构建了湖北省森林生态系统定位观测研究网络;总结讨论了该网络的合理性和保障措施、与其它生态站网络的比较和网络规划的局限性。结果表明:该网络将湖北省划分成12个分区,共布设16个森林生态站,其中计划建设12个生态站,已经建设4个生态站;不仅可以监测湖北省81.8%的森林面积,88.9%的生态功能区面积,98.2%的重点生态功能区面积和87.5%的生物多样性保护优先区面积,而且9个森林生态站分布与湖北省4个重点生态功能区和3个生物多样性保护优先区相匹配。该网络可以实现森林生态系统生态要素的连续观测与清查,为森林生态服务功能和生态效益评估,以及重大生态工程提供数据支撑和辅助决策分析依据。     

冬虫夏草和中国被毛孢形态学再研究

产自甘肃省冬虫夏草主产区的冬虫夏草具有丰富的形态多样性,少教具有2-4个子座,个别子座叉状分枝.通过移栽培养,对冬虫夏草Ophiocordyceps sinensis子座的发育过程进行了连续观察,并对子囊孢子的萌发及中国被毛孢Hirsutella sinensis的形态特征进行了再研究.观察到:在子囊孢子弹射期,子座可...