To solve the problem of the information share and services integration in population information system, we propose a multi-layer tree hierarchical architecture. The command （Web Service Call） is recursively muhicas...To solve the problem of the information share and services integration in population information system, we propose a multi-layer tree hierarchical architecture. The command （Web Service Call） is recursively muhicast from top layer of tree to bottom layer of tree and statistical data are gatbered from bottom layer to top layer. We implemented the architecture by using Web Services technology. In our implementation, client program is the requestor of Web Services, and all leaf nodes of the last layer are only the provider of Web Services. For those nodes of intermediate layers, every node is not only the provider of Web Services, but also the dispatcher of Web Services. We take population census as an cxample to describe the working flow of the architecture.展开更多
In spite of the economic potential of the sheanut tree (Vitellaria paradoxa), its domestication still has not been achieved due to the long juvenile period of seed propagated plants and the absence of a reliable veget...In spite of the economic potential of the sheanut tree (Vitellaria paradoxa), its domestication still has not been achieved due to the long juvenile period of seed propagated plants and the absence of a reliable vegetative propagation method. Three experiments were conducted by using a modified container layering technique to investigate the effects of season (rainy and dry season), light treatments (etiolation and natural light) and indole 3-butyric acid (IBA) on root formation in juvenile and mature sheanut trees. The effect of light treatments on the internal conditions such as level of sugars (soluble, insoluble and total sugars) and total free phenols in layered sheanut shoots was also considered. Rooting was generally lower in the mature trees (27.9%) compared to that in juvenile 4 year-old plants (40.9%). Etiolation increased the levels of total sugars and phenols in shoots of 4-year-old plants and mature fruit bearing trees, but this increase did not significantly enhance rooting in both the juvenile and mature sheanut trees. The container layering technique holds promise as a method for the asexual propagation of sheanut planting material. Roots formed using this method looked healthy and were vertically orientated giving layered shoots a better chance at survival.展开更多
针对复杂果园环境行间导航树干检测问题,提出一种基于多线激光雷达(Light detection and ranging,Li DAR)的主干形果树树干层级检测方法,使用16线VLP-16型LiDAR采集车辆周围的果园点云数据,通过目标分割和树干检测2个步骤层次化检测树干...针对复杂果园环境行间导航树干检测问题,提出一种基于多线激光雷达(Light detection and ranging,Li DAR)的主干形果树树干层级检测方法,使用16线VLP-16型LiDAR采集车辆周围的果园点云数据,通过目标分割和树干检测2个步骤层次化检测树干,去除非树干目标,提高树干检测精度。首先,设置环形感兴趣区域(Region of interest,ROI),采用地面拟合算法移除地面点云,消除果园目标点云之间的连通性;其次,设置矩形ROI,采用基于密度的带噪声空间聚类(Density-based spatial clustering of applications with noise,DBSCAN)算法对非地面点云进行x Oy平面聚类,根据Li DAR测量分辨率和果园目标参数设置DBSCAN算法超参数,将非地面点云分割为若干目标簇;然后,从全局和局部2个尺度提取目标簇的几何和强度特征,用这些特征描述树干与其他果园目标间的差异;最后,采用训练好的树干检测器融合特征,将目标簇划分为树干与非树干2个类别,输出树干簇。树干检测步骤采用随机森林(Random forest,RF)算法进行离线特征选择与融合,使用树干和非树干训练样本,基于基尼指数(Gini index,GI)改变量评价特征重要性,从初始特征中选择22个鉴别力较强的特征,再融合这些特征生成树干检测器。实验场景为标准化种植核桃园,共采集1317帧点云数据,从中分割12213个目标簇,其中,树冠、杂草、支撑杆、围栏、土坡、农具、行人等非树干目标占比58.04%。按照帧比例1∶4将目标簇随机划分为训练集和测试集,测试集树干检测精确率为99.16%、召回率为99.21%、F1分数为99.19%,树干层级检测平均帧耗时85.25 ms。本文方法能对复杂果园场景快速、精准地检测出树干,满足果园行间导航对树干检测的准确性和实时性要求。展开更多
The rapid changing near source, multi-stream depositional environment of conglomerate reservoirs leads to severe heterogeneity, complex lithology and physical properties, and large changes of oil layer resistivity. Qu...The rapid changing near source, multi-stream depositional environment of conglomerate reservoirs leads to severe heterogeneity, complex lithology and physical properties, and large changes of oil layer resistivity. Quantitative evaluation of water-flooded layers has become an important but difficult focus for secondary development of oilfields. In this paper, based on the analysis of current problems in quantitative evaluation of water-flooded layers, the Kexia Group conglomerate reservoir of the Sixth District in the Karamay Oilfield was studied. Eight types of conglomerate reservoir lithology were identified effectively by a data mining method combined with the data from sealed coring wells, and then a multi-parameter model for quantitative evaluation of the water-flooded layers of the main oil-bearing lithology was developed. Water production rate, oil saturation and oil productivity index were selected as the characteristic parameters for quantitative evaluation of water-flooded layers of conglomerate reservoirs. Finally, quantitative evaluation criteria and identification rules for water-flooded layers of main oil-bearing lithology formed by integration of the three characteristic parameters of water-flooded layer and undisturbed formation resistivity. This method has been used in evaluation of the water-flooded layers of a conglomerate reservoir in the Karamay Oilfield and achieved good results, improving the interpretation accuracy and compliance rate. It will provide technical support for avoiding perforation of high water-bearing layers and for adjustment of developmental programs.展开更多
基于2020年的靖宇县森林资源档案数据,采用生物量转换与扩展因子法计算了靖宇县森林乔木层的碳储量和碳密度,并分析了不同林分类型、龄组和起源的碳储量及碳密度分布特征。结果表明,靖宇县森林乔木层碳储量为131.19×10^(4)t C,平...基于2020年的靖宇县森林资源档案数据,采用生物量转换与扩展因子法计算了靖宇县森林乔木层的碳储量和碳密度,并分析了不同林分类型、龄组和起源的碳储量及碳密度分布特征。结果表明,靖宇县森林乔木层碳储量为131.19×10^(4)t C,平均碳密度为34.85 t C·hm^(-2)。各林分类型中阔叶混交林、落叶松林及针阔混交林的碳储量占比较高,分别为69.10%、11.48%和8.18%,其他类型林分的占比均小于5%;樟子松林的碳密度最高(87.88 t C·hm^(-2)),其次为榆树林(55.61 t C·hm^(-2)),水曲柳林和云杉林的碳密度均不足10 t C·hm^(-2),分别为4.45 t C·hm^(-2)和6.65 t C·hm^(-2)。不同龄组林分的碳密度(P<0.001)及不同起源林分间碳储量(P<0.001)存在显著差异,但天然林与人工林的碳密度差异较小(P=0.066)。幼龄林和中龄林的总面积占比达到了72.04%,虽然幼龄林与中龄林的碳密度显著小于其他龄组(P<0.001),但幼龄林和中龄林具备较高的碳汇能力。以上结果表明,靖宇县中、幼龄林面积占比较大有利于森林碳汇的增长。展开更多
基金Supported by the National High-Tech Researchand Development Plan of China (863 Plan 2003AA132080) theResearch Foundationfor Outstanding Young Teachers ,China Univer-sity of Geosciences (CUGQNL0506)
文摘To solve the problem of the information share and services integration in population information system, we propose a multi-layer tree hierarchical architecture. The command （Web Service Call） is recursively muhicast from top layer of tree to bottom layer of tree and statistical data are gatbered from bottom layer to top layer. We implemented the architecture by using Web Services technology. In our implementation, client program is the requestor of Web Services, and all leaf nodes of the last layer are only the provider of Web Services. For those nodes of intermediate layers, every node is not only the provider of Web Services, but also the dispatcher of Web Services. We take population census as an cxample to describe the working flow of the architecture.
文摘In spite of the economic potential of the sheanut tree (Vitellaria paradoxa), its domestication still has not been achieved due to the long juvenile period of seed propagated plants and the absence of a reliable vegetative propagation method. Three experiments were conducted by using a modified container layering technique to investigate the effects of season (rainy and dry season), light treatments (etiolation and natural light) and indole 3-butyric acid (IBA) on root formation in juvenile and mature sheanut trees. The effect of light treatments on the internal conditions such as level of sugars (soluble, insoluble and total sugars) and total free phenols in layered sheanut shoots was also considered. Rooting was generally lower in the mature trees (27.9%) compared to that in juvenile 4 year-old plants (40.9%). Etiolation increased the levels of total sugars and phenols in shoots of 4-year-old plants and mature fruit bearing trees, but this increase did not significantly enhance rooting in both the juvenile and mature sheanut trees. The container layering technique holds promise as a method for the asexual propagation of sheanut planting material. Roots formed using this method looked healthy and were vertically orientated giving layered shoots a better chance at survival.
文摘针对复杂果园环境行间导航树干检测问题,提出一种基于多线激光雷达(Light detection and ranging,Li DAR)的主干形果树树干层级检测方法,使用16线VLP-16型LiDAR采集车辆周围的果园点云数据,通过目标分割和树干检测2个步骤层次化检测树干,去除非树干目标,提高树干检测精度。首先,设置环形感兴趣区域(Region of interest,ROI),采用地面拟合算法移除地面点云,消除果园目标点云之间的连通性;其次,设置矩形ROI,采用基于密度的带噪声空间聚类(Density-based spatial clustering of applications with noise,DBSCAN)算法对非地面点云进行x Oy平面聚类,根据Li DAR测量分辨率和果园目标参数设置DBSCAN算法超参数,将非地面点云分割为若干目标簇;然后,从全局和局部2个尺度提取目标簇的几何和强度特征,用这些特征描述树干与其他果园目标间的差异;最后,采用训练好的树干检测器融合特征,将目标簇划分为树干与非树干2个类别,输出树干簇。树干检测步骤采用随机森林(Random forest,RF)算法进行离线特征选择与融合,使用树干和非树干训练样本,基于基尼指数(Gini index,GI)改变量评价特征重要性,从初始特征中选择22个鉴别力较强的特征,再融合这些特征生成树干检测器。实验场景为标准化种植核桃园,共采集1317帧点云数据,从中分割12213个目标簇,其中,树冠、杂草、支撑杆、围栏、土坡、农具、行人等非树干目标占比58.04%。按照帧比例1∶4将目标簇随机划分为训练集和测试集,测试集树干检测精确率为99.16%、召回率为99.21%、F1分数为99.19%,树干层级检测平均帧耗时85.25 ms。本文方法能对复杂果园场景快速、精准地检测出树干,满足果园行间导航对树干检测的准确性和实时性要求。
文摘The rapid changing near source, multi-stream depositional environment of conglomerate reservoirs leads to severe heterogeneity, complex lithology and physical properties, and large changes of oil layer resistivity. Quantitative evaluation of water-flooded layers has become an important but difficult focus for secondary development of oilfields. In this paper, based on the analysis of current problems in quantitative evaluation of water-flooded layers, the Kexia Group conglomerate reservoir of the Sixth District in the Karamay Oilfield was studied. Eight types of conglomerate reservoir lithology were identified effectively by a data mining method combined with the data from sealed coring wells, and then a multi-parameter model for quantitative evaluation of the water-flooded layers of the main oil-bearing lithology was developed. Water production rate, oil saturation and oil productivity index were selected as the characteristic parameters for quantitative evaluation of water-flooded layers of conglomerate reservoirs. Finally, quantitative evaluation criteria and identification rules for water-flooded layers of main oil-bearing lithology formed by integration of the three characteristic parameters of water-flooded layer and undisturbed formation resistivity. This method has been used in evaluation of the water-flooded layers of a conglomerate reservoir in the Karamay Oilfield and achieved good results, improving the interpretation accuracy and compliance rate. It will provide technical support for avoiding perforation of high water-bearing layers and for adjustment of developmental programs.
文摘基于2020年的靖宇县森林资源档案数据,采用生物量转换与扩展因子法计算了靖宇县森林乔木层的碳储量和碳密度,并分析了不同林分类型、龄组和起源的碳储量及碳密度分布特征。结果表明,靖宇县森林乔木层碳储量为131.19×10^(4)t C,平均碳密度为34.85 t C·hm^(-2)。各林分类型中阔叶混交林、落叶松林及针阔混交林的碳储量占比较高,分别为69.10%、11.48%和8.18%,其他类型林分的占比均小于5%;樟子松林的碳密度最高(87.88 t C·hm^(-2)),其次为榆树林(55.61 t C·hm^(-2)),水曲柳林和云杉林的碳密度均不足10 t C·hm^(-2),分别为4.45 t C·hm^(-2)和6.65 t C·hm^(-2)。不同龄组林分的碳密度(P<0.001)及不同起源林分间碳储量(P<0.001)存在显著差异,但天然林与人工林的碳密度差异较小(P=0.066)。幼龄林和中龄林的总面积占比达到了72.04%,虽然幼龄林与中龄林的碳密度显著小于其他龄组(P<0.001),但幼龄林和中龄林具备较高的碳汇能力。以上结果表明,靖宇县中、幼龄林面积占比较大有利于森林碳汇的增长。
