Classification method of diabetes based on integration of characteristic classifier

目的:结合医用电子鼻技术,探讨糖尿病患者及其口腔呼气的气味图谱特征。方法:选择180例糖尿病患者和100例健康者,用医用电子鼻采集280例口腔呼气的气味图谱,采用基于数据特征划分的方法,用支持向量机和随机森林集成模型对糖尿病患者进行分类预测。结果:1线性核函数的支持向量机(SVM1)分类结果不是很理想,低于多项式核(SVM2)、径向基函数核(SVM3)和随机森林(RF)3种分类器,说明分类超平面显然是非线性的;2集成分类器对糖尿病患者和健康者的气味图谱特征的识别准确率可达88.04%。结论:基于特征划分的分类器集成方法预测性能明显好于单一分类器,为使用医用电子鼻进行糖尿病诊断分析提供了一种有效手段。Objective: To discuss the proi le features of oral odor of diabetic patients based on medical electronic nose technology. Methods: 180 patients of diabetes and 100 healthy people were selected, and the proi le features of oral odor of 280 volunteers were collected by using medical electronic nose. The classii cation forecasting was carried out on diabetic patients by using support vector machine(SVM) and random forest integration model based on partitioning method of data characteristics. Results: 1The classii cation result of SVM1 was not very good, which was lower than that of SVM2, SVM3 and RF, and the result showed that the classii cation hyperplane is nonlinear. 2The accurate rate of recognition of integrated classii er on diabetic patients and healthy people is 88.04%. Conclusion: The forecasting performance of classii er integration method based on feature division is superior to that of single classii er signii cantly, which provided an ef ective means for the diagnostic analysis of diabetes based on medical electronic nose.国家自然科学基金项目(No.81373552);; 福建省教育厅A类项目(No.JA14212);; 福建工程学院科研启动项目(No.GY-Z12079)~

The Diagnosis of the Ancient Trees of Ficus microcarpa

通过对鼓浪屿古榕树的普查,选择其健康诊断的生长指标和生理指标,包括当年生枝叶、果实生长状况、叶绿素荧光等,对不同生长势的古榕树进行分析,旨在探讨基于生长指标与生理指标相结合的古榕树的健康诊断方法,为古榕树的养护与复壮提供依据。结果表明,生长指标与生理指标能较一致地指示古榕树的健康状况。因此,可通过生长指标与生理指标相结合的方法诊断古榕树的健康状况。Based on the general investigation and analysis of the ancient trees of Ficus microcarpa at Gulangyu by use of the growth indices and the physiological indices,such as the growth status of annual branches,leaves and fruits and the chlorophyll fluorescence,the diagnosis of the ancient trees of Ficus microcarpa with different growth vigor was discussed to provide evidence for their maintenance and rejuvenation.The results indicated that the growth indices and the physiological indices could consistently instruct the health status of the ancient trees of Ficus microcarpa.Thus the diagnosis by the combination of the growth indices and the physiological indices could be applied to the ancient trees of Ficus microcarpa.鼓浪屿万石山国家级风景名胜区科技项目资助(GW2008

暖温带森林功能发育过程中的物种扩散和生态位分化

群落构建的驱动力(随机过程与确定性过程)对群落构建的作用受森林功能发育过程的影响,但鲜有研究探讨两者随群落功能发育过程发生的特点.次生林功能发育阶段多样,具有检测发育过程中群落构建驱动力变化的优势.本研究利用20 hm2暖温带次生林样地基础调查数据检测了局域尺度上暖温带森林功能发育过程中群落物种扩散与生态位过程的发生特点,区分了2类过程对群落多样性构建的相对贡献.结果显示,局域尺度上功能发育过程显著影响物种扩散与生态位过程,对生态位分化过程的影响速率要快于物种扩散.在森林功能发育过程中,生态位分化表现为稳定下降,而物种扩散则为前期不变,后期稳定下降.群落功能发育尺度上的物种扩散伴随了冠层稳定的骨架结构及分离的垂直结构,提高了垂直分布上群落物种组成的匀质性,有利于物种共存.局域尺度上,物种扩散与生态位分化过程的交互效应是群落构建的主要动力,物种扩散作用要强于生态位分化过程.本研究暗示除了空间因子等的被动调节,中性与生态位过程对群落构建的相对贡献也受群落功能发育阶段的影响,群落构建驱动力受群落自身功能的调节

The Effect of Resilience Group Counseling on State Anxiety of Bullied Pupils

研究探讨心理韧性集体咨询对校园受欺凌小学生状态焦虑的影响,预期通过心理韧性集体咨询提高受欺凌小学生心理韧性进而降低状态焦虑。研究采用2(干预组/对照组)×3(前测/后测/追踪)的被试内实验设计,干预组和对照组均16人,使用儿童受欺负类型问卷、状态焦虑量表和心理韧性量表作为前测、后测和追踪阶段的评估工具。研究发现:经过心理韧性集体咨询,干预组小学生心理韧性水平显著提升,状态焦虑和受欺凌水平均显著下降;干预对心理韧性、状态焦虑和受欺凌的效应可持续至干预结束后6个月。结论:心理韧性集体咨询通过提高心理韧性降低了状态焦虑水平

无人艇的运动路径规划方法、装置、终端设备及存储介质

本发明公开了一种无人艇的运动路径规划方法、装置、终端设备及存储介质，方法包括：获取无人艇的目标位姿状态以及起始位姿状态；目标位姿状态包括：目标坐标以及目标航向角；起始位姿状态包括：起始坐标以及起始航向角；构建无人艇航行区域的栅格地图；从目标位姿状态进行反向搜索，确定无人艇从目标位姿状态至栅格地图中每个栅格的花费，将无人艇从目标位姿状态至栅格地图中每个栅格的花费作为每个栅格的启发值，生成启发值栅格地图；根据启发值栅格地图、起始位姿状态、目标位姿状态及各位姿状态的轨迹单元，生成无人艇从起始位姿状态至目标位姿状态的运动路径；每一位姿状态所对应的轨迹单元根据每一位姿状态以及预设的无人艇动力学模型生成