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基于CA-Markov模型的贵阳市花溪区景观格局预测及优化
花溪区 城市景观格局 CA-Markov模型 最小累积阻力模型 热点分析
2020/12/10
为优化贵阳市花溪区的景观格局,以2008—2018年的花溪区景观为研究对象,采用CA-Markov模型对花溪区未来景观格局进行预测,并使用最小累计阻力模型及热点分析,对区域景观格局进行优化。结果表明:(1)花溪区景观类型主要由乔灌地及耕地构成,2008—2018年间,区域建设用地扩张迅速,景观斑块数量及破碎化程度不断上升,其它景观基数较少。其中草地占比稳步升高,裸地占比总体下降,水体景观的变化则相...
对中国初治的基因1b型慢性丙型肝炎患者的新型抗病毒药物(DAAs)方案进行成本-效果分析,为相关医疗卫生决策提供药物经济学证据。方法 根据慢性丙型肝炎疾病自然史构建Markov模型,从中国医疗卫生体系角度出发,分别模拟非肝硬化和代偿性肝硬化丙肝患者在不同治疗方案下获得的质量调整生命年(QALYs)和所花费的直接医疗成本,并计算增量成本-效果比(ICER)。模型循环周期为1年,模拟时限设定为终身(1...
Complexity of Estimating Renyi Entropy of Markov Chains
information theory Renyi entropy Min-entropy
2019/7/8
Estimating entropy of random processes is one of the fundamental problems of machine learning and property testing. It has numerous applications to anything from DNA testing and predictability of huma...
Lattice Gaussian Sampling by Markov Chain Monte Carlo: Bounded Distance Decoding and Trapdoor Sampling
lattice Gaussian sampling Markov chain Monte Carlo bounded distance decoding
2019/6/5
Sampling from the lattice Gaussian distribution plays an important role in various research fields. In this paper, the Markov chain Monte Carlo (MCMC)-based sampling technique is advanced in several f...
基于Markov模型的纳武利尤单抗治疗化疗后失败的进展期胃癌的成本效果分析
胃肿瘤 免疫疗法 纳武利尤单抗 费用效益分析
2019/3/29
评价近期在国内批准上市的纳武利尤单抗治疗化疗后失败的进展期胃癌的成本效果。方法：采用ATTRACTION-2临床试验所获数据（纳武利尤单抗组330例，安慰剂组163例），建立Markov模型模拟化疗失败后进展期胃癌的疾病过程。分析每组的成本、生命年（LY）以及质量调整生命年（QALY），然后计算增量成本效果比（ICER），并根据程序性细胞死亡配体1（PD-L1）的表达进行了亚组分析。运用敏感度分析...
本研究采用Markov模型对坎地沙坦酯、厄贝沙坦和替米沙坦预防高血压患者卒中和心肌梗死事件进行长期经济学评价,为高血压药物干预提供依据。方法 根据高血压疾病自然史构建Markov模型,从全社会角度预测不同治疗方案下患者的医疗费用和获得的质量调整生命年(quality adjusted life years,QALYs),并计算增量成本效果比(incremental cost-effectivene...
SAR IMAGE CHANGE DETECTION BASED ON FUZZY MARKOV RANDOM FIELD MODEL
SAR change detection Markov random field fuzzy set theory
2018/4/30
Most existing SAR image change detection algorithms only consider single pixel information of different images, and not consider the spatial dependencies of image pixels. So the change detection resul...
LANDSLIDE INVENTORY MAPPING FROM BITEMPORAL 10 m SENTINEL-2 IMAGES USING CHANGE DETECTION BASED MARKOV RANDOM FIELD
Landslide Inventory Mapping Change Detection Normalized Difference Vegetation Index Principal Component Analysis Markov Random Field Sentinel-2 Images
2018/4/30
Landslide inventory mapping is essential for hazard assessment and mitigation. In most previous studies, landslide mapping was achieved by visual interpretation of aerial photos and remote sensing ima...
MONITORING FARMLAND LOSS CAUSED BY URBANIZATION IN BEIJING FROM MODIS TIME SERIES USING HIERARCHICAL HIDDEN MARKOV MODEL
Urban Encroachment onto Farmland Time Series Change Detection Hierarchical Hidden Markov Model (HHMM)
2018/4/30
In this study, we proposed a method to map urban encroachment onto farmland using satellite image time series (SITS) based on the hierarchical hidden Markov model (HHMM). In this method, the farmland ...
HIGH-RESOLUTION REMOTE SENSING IMAGE BUILDING EXTRACTION BASED ON MARKOV MODEL
Markov Model Contourlet Transform Map Clustering Spectral Feature Index Building Extraction High Resolution Remote Sensing Image
2018/4/30
With the increase of resolution, remote sensing images have the characteristics of increased information load, increased noise, more complex feature geometry and texture information, which makes the e...
BUILDING ROOF BOUNDARY EXTRACTION FROM LiDAR AND IMAGE DATA BASED ON MARKOV RANDOM FIELD
Markov Random Field LiDAR Aerial images Building roof boundary
2017/5/31
In this paper a method for automatic extraction of building roof boundaries is proposed, which combines LiDAR data and highresolution aerial images. The proposed method is based on three steps. In the...
LAND USE/LAND COVER CHANGES IN SEMI-ARID MOUNTAIN LANDSCAPE IN SOUTHERN INDIA: A GEOINFORMATICS BASED MARKOV CHAIN APPROACH
Land cover Markov Kallar NDVI Drought Geoinformatics
2017/5/31
Nowadays land use/ land cover in mountain landscape is in critical condition; it leads to high risky and uncertain environments. These areas are facing multiple stresses including degradation of land ...
MARKOV MODELING OF MOVING TARGET DEFENSE GAMES
Moving Target Defense Security Capacity Markov Models
2016/12/12
We introduce a Markov-model-based framework for Moving Target Defense (MTD) analysis. The framework allows modeling of a broad range of MTD strategies, provides general theorems about how the probabil...
ANALYSIS AND VALIDATION OF GRID DEM GENERATION BASED ON GAUSSIAN MARKOV RANDOM FIELD
DEM Gaussian Markov Random Field Spatial Modelling
2016/7/8
Digital Elevation Models (DEMs) are considered as one of the most relevant geospatial data to carry out land-cover and land-use classification. This work deals with the application of a mathematical f...
Predicting the Performance of a Design Team Using a Markov Chain Model
New product development optimization organizational decision processes organizational design Queuing/Markov analysis
2016/5/18
When faced with a complex design problem, a design team may separate it into subproblems. We would like to know when this approach is superior and how subproblems shouldbe assigned to team members. We...