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基于传播机理网络的服务组合时延故障溯源方法

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杭州电子科技大学学报（自然科学版） 2024年第3期44卷 12-22页

作者：章振杰沈占峰徐晓滨何宏杭州电子科技大学中国-奥地利人工智能与先进制造一带一路联合实验室浙江杭州310018 杭州电子科技大学自动化学院(人工智能学院) 浙江杭州310018 杭州电子科技大学通信工程学院浙江杭州310018

在动态多变的云环境下,服务组合发生故障的概率大大增加。时延故障是一类典型的故障模式。然由于服务之间存在复杂的交互关系,单个服务的时延故障会在组合内传播,致使故障排查与定位困难。本文提出了一种基于传播机理网络的服务组合时... 详细信息

在动态多变的云环境下,服务组合发生故障的概率大大增加。时延故障是一类典型的故障模式。然由于服务之间存在复杂的交互关系,单个服务的时延故障会在组合内传播,致使故障排查与定位困难。本文提出了一种基于传播机理网络的服务组合时延故障溯源方法。基于服务之间的交互关系,建立故障传播网络模型,对服务之间的时延故障传播机理进行形式化描述,设计了基于全局故障传播影响力和局部路径二分法的故障溯源算法,在无需获取所有服务状态信息的情况下实现了故障源的高效精准定位,降低了故障排查的代价。最后,通过电梯曳引绳设计服务组合的实验,验证了方法的有效性和先进性。

关键词：服务组合复杂网络时延故障故障溯源故障传播

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古建筑火灾风险智能孪生评估方法研究

中国安全生产科学技术 2024年第9期20卷 29-38页

作者：孙占辉张恒潘睿袁宏永高学鸿王海燕黄丽达沈占锋雷雅婷清华大学安全科学学院北京100084 清华大学合肥公共安全研究院安徽合肥230601 北京科技大学大安全科学研究院北京100083 中国科学院空天信息创新研究院北京100101

为实现有效的古建筑灾害预防和应急处置决策,采用“数据-处理-业务-服务”的多层次框架,与贝叶斯网络和K-Means聚类算法(BN-KM算法),基于数字孪生模型建立1种古建筑(群)火灾风险评估及决策建议的智能方法,通过8地古建筑火灾历史案例验... 详细信息

为实现有效的古建筑灾害预防和应急处置决策,采用“数据-处理-业务-服务”的多层次框架,与贝叶斯网络和K-Means聚类算法(BN-KM算法),基于数字孪生模型建立1种古建筑(群)火灾风险评估及决策建议的智能方法,通过8地古建筑火灾历史案例验证该模型的多区域适用性(准确率为87.50%),通过G古建筑(群)4个时段的火灾风险演化规律,验证该方法的时间动态适用性。研究结果表明:该方法中多层次框架可实现多源异构数据(历史数据、监测数据等)的集成量化和风险评估的秒级运算,孪生方法可在事故发生或未造成重要损失前进行计算推演得到高风险区域,并针对不同对象(决策者、救援者、公众)提供专业服务,本文描述新智能方法的评估和决策建议流程,该方法论可拓展应用至其他灾害场景(地震等)。研究结果可为古建筑灾害预防和应急处置提供意见支持。

关键词：风险评估数字孪生古建筑(群)

Land cover automatic classification based on RS-Informatic Tupu

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遥感学报 2014年第4期18卷 788-803页

作者： XIA Liegang LUO Jiancheng WANG Weihong shen zhanfeng Institute of Remote Sensing and Digital Earth Chinese Academy of Science Beijing 100101 China College of Computer Science and Technology Zhejiang University of Technology Hangzhou 310023 China

遥感数据的海量堆积与应用信息的匮乏日益凸显信息认知提取的重要性,在地学信息图谱方法论的指导下,同时参考视觉认知流程,提出了遥感信息图谱认知方法用于遥感数据的自动解译。在地理信息系统的统一框架下逐步挖掘多源遥感数据的“图... 详细信息

遥感数据的海量堆积与应用信息的匮乏日益凸显信息认知提取的重要性,在地学信息图谱方法论的指导下,同时参考视觉认知流程,提出了遥感信息图谱认知方法用于遥感数据的自动解译。在地理信息系统的统一框架下逐步挖掘多源遥感数据的“图”、“谱”特征并进行图谱耦合分析,通过多尺度分割、特征分析、监督学习等关键步骤完成“察觉一分辨一确认”的地学认知流程,初步满足自动化和智能化应用需求。在土地覆盖信息自动解译应用中建立了基于“图谱”先验知识的管理与运用机制以实现自动化,采用机器学习算法提升智能化程度,并以自适应迭代控制模型使结果精度向最优逼近。选取了珠江三角洲的试验区域进行了基于ALOS多光谱影像的土地覆盖自动分类,结果符合预期,说明了本文方法的可行性。

关键词：图谱认知自动解译土地覆盖自动分类

Red list assessments of Chinese higher plants

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International Journal of Digital Earth 2023年第1期16卷 2762-2775页

作者： Liping Li Haining Qin Eimear Nic Lughadha Yaomin Zheng Huawei Wan Jack Plummer Melanie-Jayne R.Howes Huiyuan Liu Yangming Jiang Tuo Wang Huihui Zhao zhanfeng shen Huiping Huang Chinese Academy of Sciences Aerospace Information Research InstituteBeijingPeople’s Republic of China Chinese Academy of Sciences Institute of BotanyBeijingPeople’s Republic of China Royal Botanic Gardens KewRichmondUK School of International Economics and Management Beijing Technology and Business UniversityBeijingPeople’s Republic of China. Satellite Environmental Application Center Ministry of Ecology and EnvironmentBeijingPeople’s Republic of China. University of Chinese Academy of Sciences BeijingPeople’s Republic of China

Based on the two most recent assessments of Chinese higher plants in 2013 and 2020,of 34,450 and 39,330 species,respectively,we analysed the threatened status of Chinese higher *** 2020,around 4,088(10.39%)of the assessed species in China are threatened,2,875(7.31%)Near Threatened,27,593(70.16%)not currently threatened and categorised as Least Concern and 4,752(12.08%)categorised as Data *** in 2013,3,767(10.93%)of the assessed higher plants in China are threatened,2,723(7.90%)Near Threatened,24,296(70.53%)Least Concern and 3,612(10.48%)Data *** of the Red List Index in the two years show different patterns when using different weighting methods with the equal steps weighting method showing a slight decrease(0.91675-0.91495)and the extinction risk weighting method showing a slight increase(0.98792-0.98797).We inferred that China's threatened plant species were likely/relatively effectively ***,attention should also be given to the non-threatened species in the future as an additional strategy for their conservation,to maintain their non-threatened status.

关键词： Chinese higher plants conservation IUCN red list assessment red list index(RLI) sustainable development goals(SDGs)

Spatial Distribution of Land Cover and Vegetation Activity along Topographic Gradient in an Arid River Valley, SW China

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Journal of Mountain Science 2009年第3期6卷 274-285页

作者： LIU Wen XU Xianli LUO Jiancheng shen zhanfeng ZHONG Qiuhai Department of Automatic Control School of Automation Beijing Institute of Technology Beijing 100081 China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing 100101 China Centre for Hydrology Micrometeorology and Climate Change Department of Civil and Environmental Engineering University College Cork Cork Ireland

Anthropogenic activities have become more and more important in characterizing the landscape, but their impacts are still restricted by natural environments. This paper discusses the interactions of anthropogenic activity, vegetation activity and topography through describing the spatial distribution of land cover and vegetation activity (represented by Normalized Difference Vegetation Index, NDVI) along topographic gradient in a mountainous area of southwestern China. Our results indicate that the existing landscape pattern is controlled by anthropogenic activities as well as topographic factors. Intensive anthropogenic activities mainly occur in areas with relatively low elevation, gentle and concave slopes, as these areas are easy and convenient to attain for human. Because of the destruction by human, some land cover types (mainly grassland and shrub) are only found in relatively harsher environments. This study also finds that topographic wetness index (W) used in other places only reflects runoff generation capacity, but not indicate the real spatial pattern of soil water content in this area. The relationships between NDVI and W, and NDVI and length slope factor (LSF) show that runoff and erosion have complex effects on vegetation activity. Greater values of W and LSF will lead to stronger capacity to produce runoff and transport sediment, and thereby increase soil water content and soil deposition, whereas beyond a certain threshold runoff and erosion are so strong that they would destruct vegetation growth. This study provides information needed to successfully restore native vegetation, improve land management, and promote sustainable development in mountainous areas, especially for developing regions.

关键词： Vertical distribution of land cover Anthropogenic activity Vegetation activity Environmental variability China

基于MODIS密集时间序列数据的塔里木河下游植被活动过程监测

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资源科学 2019年第3期41卷 591-600页

作者：朱长明李均力沈占锋沈谦江苏师范大学地理与测绘学院徐州221116 中国科学院新疆生态与地理研究所乌鲁木齐830011 中国科学院遥感与数字地球研究所北京100101 中国科学院大学北京100049

针对塔里木河下游生态输水的绩效评估和环境效益问题,本文采用2000—2017年的16天合成的MOD13Q1密集时序NDVI数据,辅助以GF-2数据,反演和监测塔里木河下游植被覆盖度(FVC)变化;进而通过最大和平均植被覆盖度指标,探讨了塔里木河下游植... 详细信息

针对塔里木河下游生态输水的绩效评估和环境效益问题,本文采用2000—2017年的16天合成的MOD13Q1密集时序NDVI数据,辅助以GF-2数据,反演和监测塔里木河下游植被覆盖度(FVC)变化;进而通过最大和平均植被覆盖度指标,探讨了塔里木河下游植被在生态输水条件下的生长和恢复情况。结果表明:总体上,近20年来随着塔河的综合治理工程和人工生态调水工程的推进,塔河下游植被恢复明显,最大植被覆盖度和平均植被覆盖度均呈现显著增加的趋势(P0.05)。结合下游生态输水数据分析表明,塔河下游植被恢复与输水量之间存在强依赖关系,且对生态输水的响应存在时间滞后性。

关键词：植被覆盖度 MODIS 塔里木河遥感监测生态输水

Development and preservation mechanism of deep and ultra-deep carbonate reservoirs

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Science China Earth Sciences 2024年第11期67卷 3367-3385页

作者： Anjiang shen Anping HU zhanfeng QIAO Jianfeng ZHENG Min SHE Liyin PAN Key Laboratory of Carbonate Reservoir CNPC State Energy Key Laboratory of Carbonate Oil and Gas PetroChina Hangzhou Research Institute of Geology

Exploration practice has proved that deep and ultra-deep reservoirs consist of mainly matrix-porous dolomite reservoirs and fractured-vuggy karst reservoirs and still will be very important targets for future exploration, in which large oil and gas fields such as Anyue, Yuanba, Halahatang, Fuman and Shunbei have been discovered. This paper systematically summarizes three theoretical and technical achievements in studying deep and ultra-deep carbonate reservoirs in the past decade.(1) The micro-zone and multi-parameter experiment analysis technology featured by determining the “age, temperature, pressure and fluid properties” of carbonate reservoirs, together with experimental simulation of cross-tectonic-period pore formation and preservation featured by the “multi-stage, continuous, visualized and online detection technology”, providing useful tools for studying the pore formation and preservation mechanism of deep and ultra-deep carbonate rocks from the perspective of“forward” and “inversion”.(2) Deep and ultra-deep matrix-porous dolostone reservoirs are still controlled by sedimentary facies,among which reef(mound) and/or beach contribute most. The reservoir space is mainly composed of sedimentary primary pores and supergene dissolution pores and fractures, though some of reservoir spaces are formed by burial dissolution and they tend to develop and may locally concentrate following the pre-existing porous zone. In other words, burial dissolution vugs are inherited rather than newly formed. Early dolomite precipitation(or dolomitization) has a high potential to preserve early pores.(3) The development and preservation mechanism of fractured-vuggy karst limestone reservoirs in deep and ultra-deep realm was analyzed. Pene-contemporaneous dissolution and interlayer and buried-hill karstification control the development of early and late supergene fractured-vuggy reservoirs. Strike-slip faults superimposed with supergene karstification lead to the development of “fen

关键词： Deep and ultra-deep formation Carbonate reservoirs Matrix-porous dolomite reservoir Fractured-vuggy karst reservoir Genersis and distribution of carbonate reservoirs

塔里木河下游生态环境变化时序监测与对比分析

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地球信息科学学报 2019年第3期21卷 437-444页

塔里木河下游地区是我国西部干旱区生态环境问题比较突出的区域。本文主要从地表水(湖泊、河流和湿地)、地下水、地表植被覆盖的角度,基于多源遥感和长时间序列数据,监测和分析生态输水前后区域环境变化和生态响应。首先,采用基于知识... 详细信息

塔里木河下游地区是我国西部干旱区生态环境问题比较突出的区域。本文主要从地表水(湖泊、河流和湿地)、地下水、地表植被覆盖的角度,基于多源遥感和长时间序列数据,监测和分析生态输水前后区域环境变化和生态响应。首先,采用基于知识迁移的专题图斑更新技术,实现了1990、1995、2000、2005、2010和2015年区域湿地遥感制图和植被覆盖度等生态因子指标提取;然后,以2000年为基准(生态输水起始年),结合地下水位观测数据,对比分析了人工生态输水前后区域生态环境动态变化过程。结果显示:①生态输水前(1990-2000年),塔河下游的生态环境持续恶化,流域范围内一半以上的沼泽湿地消失、河道干涸,地下水位下降,区域植被覆盖大幅度下降;②生态输水后(2000-2017年),区域生态环境明显好转,改变了下游河道长期断流状态,区域地下水位明显抬升,地表水域(湖泊和沼泽)面积呈现"V"型逆转增加,区域植被覆盖区和覆盖度均呈现显著增加趋势,曾经一度干涸的塔河尾闾台特玛湖水域面积2017年8月达到147.87 km2。以上研究结果综合表明人工生态输水工程对塔河下游生态环境拯救和治理发挥了重要作用,遏制了生态输水前塔河下游生态环境继续恶化局面,流域生态环境正在逐步恢复。

关键词：塔里木河下游生态环境遥感生态调水动态监测

基于地块特征基元与多时相遥感数据的冬小麦播种面积快速提取

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农业工程学报 2011年第9期27卷 94-99页

作者：朱长明骆剑承沈占锋程熙中国科学院遥感应用研究所北京100101 中国科学院研究生院北京100049

冬小麦播种面积监测是农情遥感的重要研究内容之一,及时、准确地获取冬小麦的播种面积对冬小麦产量估算具有重要的意义。该文在面向对象技术的支持下,首先利用融合的高空间分辨率SPOT5遥感影像提取农田地块专题层信息;然后在专题层控制... 详细信息

冬小麦播种面积监测是农情遥感的重要研究内容之一,及时、准确地获取冬小麦的播种面积对冬小麦产量估算具有重要的意义。该文在面向对象技术的支持下,首先利用融合的高空间分辨率SPOT5遥感影像提取农田地块专题层信息;然后在专题层控制下对多时相的ETM+遥感数据统一尺度分割,得到不同时相遥感影像相同形状的地块特征基元;通过光谱特征规则集构建不同时相的冬小麦信息提取模型,实现对各个时期冬小麦播种田块对象的提取;最后通过交叉验证,确定最终的冬小麦播种面积。结果表明,该方法能够快速获得冬小麦播种面积,总体精度达到90%以上,基本上能够满足农情遥感监测的需求,为冬小麦种植面积遥感快速监测提供了一种可行的方法。

关键词：遥感冬小麦面积提取面向对象农田地块