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| 1 | 土地利用对土壤性质影响的区域差异研究显示文摘【目的】研究探讨土地利用对土壤性质影响的区域差异性。【方法】选择4类土地利用方式(天然林、人工林、灌丛和耕地),分别在山西寿阳县和四川丹棱县野外采集土壤样方进行测定,利用统计分析法研究土地利用对土壤性质影响的区域差异。【结果】不同土地利用方式对土壤性质的影响差异显著。人类活动干扰小的土地利用方式的土壤有机质、全氮含量和含盐量等普遍高于人类影响较强的土地利用方式。相同的土地利用方式对土壤性质的影响具有空间差异。即便在相同的土地利用方式下,不同的耕作制度和田间管理措施(灌溉、施肥、农药等)也会造成土壤特性的区域异质性。【结论】不同土地利用方式对土壤性质影响的区域差异揭示了人类活动对环境变化影响的区域差异,可以在一定程度上解释'人-地'的复杂性关系,研究结果可为国家在区域土地规划、作物栽培布局和水土保持政策制订等提供科学依据。 | 吴文斌 杨鹏 唐华俊 Ongaro Luca Shibasaki Ryosuke | 2007 | 中国农业科学2007，40，8： | 69 |
| 2 | 两种NDVI时间序列数据拟合方法比较显示文摘归一化植被指数(NDVI)时间序列数据拟合目的是降低时序数据的噪声水平,重建高质量的NDVI时序数据,有利于多种参数反演和信息提取。针对国际上普遍应用的两种NDVI时间序列数据拟合方法,即Savitzky-Golay滤波法和非对称性高斯函数拟合法,该文在介绍两种方法基本概念的基础上,利用直接比较法和间接比较法在中国对两种拟合方法进行了比较分析。结果表明,Savitzky-Golay滤波法和非对称性高斯函数拟合法的拟合效果总体上一致,但二者之间还是存在区域差异性,这种区域差异与两种方法的自身特点和中国区域自然条件紧密相关。不同数据拟合方法的比较研究可以弄清每种方法的优缺点和区域适宜性,有助于研究人员针对不同研究目的和研究区域选择适宜的NDVI数据拟合方法,减少遥感数据处理中的误差,提高研究精度。 | 吴文斌 杨鹏 唐华俊 周清波 Shibasaki Ryosuke 张莉 | 2009 | 农业工程学报2009，25，11： | 65 |
| 3 | 基于NDVI数据的华北地区耕地物候空间格局显示文摘【目的】探讨基于多时相遥感信息监测中国华北地区耕地种植制度和物候空间格局特征。【方法】选择NDVI时间序列数据,采用非对称性高斯函数拟合方法重建平滑曲线,依据年内NDVI变化曲线峰值数目监测华北地区耕地的多熟种植制度,并利用动态阈值法获取该种植制度下耕地物候空间格局。【结果】华北地区耕地种植制度以一年两熟为主,其分布具有明显的空间差异性,随着纬度递减呈现出从简单到复杂的总体趋势。在该种植制度下,华北地区耕地第一季作物的生长开始期和生长结束期存在十分明显的空间差异,一年两熟区域的第一季作物生长开始期和生长结束期要明显早于一熟区域。与第一季作物物候期明显的空间差异相比,华北地区耕地第二季作物物候期差异不显著。【结论】华北地区耕地种植制度与物候分布格局和自然地理环境紧密相关,不同区域的温度、降水和光照等气候资源的禀赋和匹配程度对该区域的种植结构和作物布局有很大影响。此外,这种耕地物候空间格局还与作物品质、耕作水平、灌溉、施肥和农药等有密切关系。如何区别生态环境因子和人类活动因子对耕地物候的影响是今后值得深入研究的问题。 | 吴文斌 杨鹏 唐华俊 Shibasaki Ryosuke 周清波 张莉 | 2009 | 中国农业科学2009，42，2： | 55 |
| 4 | 四类全球土地覆盖数据在中国区域的精度评价显示文摘该研究以中国耕地类别为研究对象,选择2000年中国土地利用数据(NLCD-2000)为参考数据,利用比较分析法,从面积数量精度和空间位置精度两方面对目前4类全球土地覆盖数据(UMD、IGBP-DISCover、MODIS和GLC2000)产品进行了精度验证,并分析研究了4类数据精度的异同性。结果表明,4类全球数据对中国耕地数量特征和空间位置特征的估测具有明显的区域差异性。MODIS数据集和GLC2000数据集对中国耕地制图的总体精度要高于UMD数据集和IGBP-DISCover数据集。4类数据制图精度高的区域主要分布在中国的农业主产区,而误差大的区域主要分布在中国山区或耕地比例低的区域。低空间分辨率的信息源、基于像元的分类方法,以及中国复杂地形特征是4类全球土地覆盖数据精度差异的主要原因。 | 吴文斌 杨鹏 张莉 唐华俊 周清波 Shibasaki Ryosuke | 2009 | 农业工程学报2009，25，12： | 50 |
| 5 | 基于U型卷积神经网络的航空影像建筑物检测显示文摘经典的卷积神经网络结构在前向传播过程中分辨率不断下降,导致仅采用末层特征时难以实现建筑物边缘的精确分割,进而限制目标检测精度。针对该问题,提出一种基于U型卷积网络的建筑物检测方法。首先借鉴在图像分割领域中性能出色的神经网络模型U-Net的建模思想,采用对称式的网络结构融合深度网络中的高维和低维特征以恢复高保真边界;其次考虑到经典U-Net对位于特征金字塔顶层的模型参数优化程度相对不足,通过在顶层和底层两个不同尺度输出预测结果进行双重约束,进一步提升了建筑物检测精度。在覆盖范围达30km2、建筑物目标28 000余个的航空影像数据集上的试验结果表明,本文方法的检测结果在IoU和Kappa两项关键评价指标的均值上分别达到83.7%和89.5%,优于经典U-Net模型,显著优于经典全卷积网络模型和基于人工设计特征的AdaBoost模型。 | 伍广明 陈奇 Ryosuke SHIBASAKI 郭直灵 邵肖伟 许永伟 | 2018 | 测绘学报2018，47，6： | 45 |
| 6 | 过去20年中国耕地生长季起始期的时空变化显示文摘多时相遥感数据能够较好地描述区域尺度的植被物候和生长季节的变化特征。利用NDVI时序数据,采用非对称性高斯函数拟合方法重建平滑曲线,分别提取了我国20世纪80年代初、90年代初和21世纪初等3个时期为我国耕地第一生长季起始期,计算3个时期平均生长起始期,并分析了我国耕地第一生长季起始期的区域空间分异规律;然后,从区域和省份两个尺度分析了20世纪80年代初至90年代初和20世纪90年代初至21世纪初两个阶段我国耕地生长季起始期动态变化趋势和空间格局。结果表明,我国不同区域耕地第一生长季起始期存在十分明显的空间差异,清楚地呈现出一个从南向北逐渐推迟的空间特征;从不同区域看,在20世纪80年代初至90年代初和20世纪90年代初至21世纪初两个时期,我国耕地第一生长季起始期变化都是提前和推迟并存,不同区域变化程度不一;从不同省份看,在过去20年间,我国绝大多数省份耕地第一生长季起始期都表现为总体提前的趋势,但不同省份的起始期变化具有差异性。影响我国耕地生长季起始期变化的因素很多,如何区别气候变化等自然因子和人类活动因子对耕地生长季起始期变化的影响是一个值得深入研究的问题。 | 吴文斌 杨鹏 唐华俊 周清波 Shibasaki Ryosuke 张莉 唐鹏钦 | 2009 | 生态学报2009，29，4： | 33 |
| 7 | 基于空间模型的全球粮食安全评价显示文摘在综合考虑自然、社会和经济等因子对粮食安全影响的基础上,选择了人均粮食占有量和人均GDP两个指标空间显性评价全球粮食安全状况。为此,本研究构建了3个模型,即空间EPIC模型、作物选择模型和IFPSIM模型,分别模拟作物单产、作物播种面积和作物价格。利用构建的评价框架和模型,以网格大小为6分弧度的地理单元为评价对象,选择水稻、玉米、小麦和大豆等4类全球主要作物类型,以2000年为初始年份,对未来2020年的全球粮食安全状况进行了评价。结果表明,到2020年,多数南亚国家和非洲国家,由于其人均粮食占有量和人均GDP两个指标值都显著降低,粮食供应不足和贫困一起将可能导致该区域存在粮食危机和饥饿风险。对于其他区域,日益增长的粮食需求可以通过本区域的粮食生产自给予以满足,或通过外部购买或粮食进口得到满足,总体上不存在粮食安全问题。为保障未来粮食安全,一方面要保护耕地数量和质量、防止土壤退化、增加资本投入、进行技术创新和升级,提高粮食综合生产能力,保障粮食的有效供给;另一方面加大农业补贴,切实提高农民收入,保障农民利益,增强农业购买力。同时,大力改善粮食流通和农产品贸易体制,通过外部市场来调节粮食供给;积极应对气候变化,提高农业生产对气候变化的适应能力,保证粮食生产的稳定。 | 吴文斌 唐华俊 杨鹏 周清波 陈仲新 Ryosuke SHIBASAKI | 2010 | 地理学报2010，65，8： | 29 |
| 8 | Framework of SAGI Agriculture Remote Sensing and Its Perspectives in Supporting National Food Security显示文摘Remote sensing,in particular satellite imagery,has been widely used to map cropland,analyze cropping systems,monitor crop changes,and estimate yield and production.However,although satellite imagery is useful within large scale agriculture applications(such as on a national or provincial scale),it may not supply sufficient information with adequate resolution,accurate geo-referencing,and specialized biological parameters for use in relation to the rapid developments being made in modern agriculture.Information that is more sophisticated and accurate is required to support reliable decision-making,thereby guaranteeing agricultural sustainability and national food security.To achieve this,strong integration of information is needed from multi-sources,multi-sensors,and multi-scales.In this paper,we propose a new framework of satellite,aerial,and groundintegrated(SAGI)agricultural remote sensing for use in comprehensive agricultural monitoring,modeling,and management.The prototypes of SAGI agriculture remote sensing are first described,followed by a discussion of the key techniques used in joint data processing,image sequence registration and data assimilation.Finally,the possible applications of the SAGI system in supporting national food security are discussed. | SHI Yun JI Shun-ping SHAO Xiao-wei TANG Hua-jun WU Wen-bin YANG Peng ZHANG Yong-jun Shibasaki Ryosuke | 2014 | Journal of Integrative Agriculture2014，13，7： | 16 |
| 9 | Characterizing Spatial Patterns of Phenology in Cropland of China Based on Remotely Sensed Data显示文摘This study used time-series of global inventory modeling and mapping studies(GIMMS) normalized difference vegetation index(NDVI) datasets at a spatial resolution of 8 km and 15-d interval to investigate the spatial patterns of cropland phenology in China.A smoothing algorithm based on an asymmetric Gaussian function was first performed on NDVI dataset to minimize the effects of anomalous values caused by atmospheric haze and cloud contamination.Subsequent processing for identifying cropping systems and extracting phenological parameters,the starting date of growing season(SGS) and the ending date of growing season(EGS) was based on the smoothed NVDI time-series data.The results showed that the cropping systems in China became complex as moving from north to south of China.Under these cropping systems,the SGS and EGS for the first growing season varied largely over space,and those regions with multiple cropping systems generally presented a significant advanced SGS and EGS than the regions with single cropping patterns.On the contrary,the phenological events of the second growing season including both the SGS and EGS showed little difference between regions.The spatial patterns of cropping systems and phenology in Chinese cropland were highly related to the geophysical environmental factors.Several anthropogenic factors,such as crop variety,cultivation levels,irrigation,and fertilizers,could profoundly influence crop phenological status.How to discriminate the impacts of biophysical forces and anthropogenic drivers on phenological events of cultivation remains a great challenge for further studies. | WU Wen-bin YANG Peng TANG Hua-jun ZHOU Qing-bo CHEN Zhong-xin Ryosuke Shibasaki | 2010 | Agricultural Sciences in China2010，9，1： | 14 |
| 10 | Scenario-based assessment of future food security显示文摘这份报纸论述对全球未来食物安全的一个基于情形的评价。做那,社会经济并且气候变化情形为未来被定义并且被连接到一个综合建模框架。官方补给底的环境政策综合气候(史诗) 模型和庄稼区域模仿的庄稼收益由庄稼选择决定模型模仿了被联合计算全部的食物生产和人均的食物可获得性,它被用来代表食物可获得性和稳定性的地位。IFPSIM 模型模仿的人均的粗野国内产品(GDP ) 被用来反映食物可接近性和 affordability 的状况。基于这二指示物,未来食物安全地位在约 20 年的一个时期上在全球规模被估计,从 2000 年开始。结果证明象南亚和很非洲的国家愿望那样的某些区域多半作为人均的食物可获得性和能进口在 2000 和 2020 之间的食物愿望减少的能力在未来仍然是食物紧张的热点。与贫穷联系的低食物生产是到在这些区域的饥饿的决定因素,并且更多的努力被需要以未来行动与饥饿作斗争。另外的区域象在到的能力的人均的食物可获得性或增加有增加的南方美国人国家进口的中国,很东方的欧洲国家和大多数那样在 2000 和 2020 之间的食物可能能改进他们的食物安全状况。 | WU Wenbin TANG Huajun YANG Peng YOU Liangzhi ZHOU Qingbo CHEN Zhongxin SHIBASAKI Ryosuke | 2011 | Journal of Geographical Sciences2011，21，1： | 9 |
| 11 | Development of a GIS-based Decision Support System for Assessing Land Use Status显示文摘The objectives of this study are to assess land s ui tability and to predict the spatial and temporal changes in land use types (LUTs ) by using GIS-based land use management decision support system. A GIS databas e with data on climate, topography, soil characteristic, irrigation condition, f ertilizer application, and special socioeconomic activities has been developed a nd used for the evaluation of land productivity for different crops by integrati ng with a crop growth model-the erosion productivity impact calculator (EPIC). International food policy simulation model (IFPSIM) is also embedded into GIS fo r the predictions of how crop demands and crop market prices will change under a lternative policy scenarios. An inference engine (IE) including land use choice model is developed to illustrate land use choice behavior based on logit models , which allows to analyze how diversified factors ranging from climate changes, crop price changes to land management changes can affect the distribution of agr icultural land use. A test for integrated simulation is taken in each 0.1° by 0.1° grid cell to predict the change of agricultural land use types at globa l level. Global land use changes are simulated from 1992 to 2050. | Ryosuke Shibasaki Kanichiro Matsumura | 2004 | Geo-Spatial Information Science2004，7，1： | 6 |
| 12 | An integrated model to simulate sown area changes for major crops at a global scale显示文摘Dynamics of land use systems have attracted much attention from scientists around the world due to their ecological and socio-economic implications. An integrated model to dynamically simulate future changes in sown areas of four major crops (rice, maize, wheat and soybean) on a global scale is pre- sented. To do so, a crop choice model was developed on the basis of Multinomial Logit (Logit) model to model land users' decisions on crop choices among a set of available alternatives with using a crop utility function. A GIS-based Environmental Policy Integrated Climate (EPIC) model was adopted to simulate the crop yields under a given geophysical environment and farming management conditions, while the International Food Policy and Agricultural Simulation (IFPSIM) model was utilized to estimate crop price in the international market. The crop choice model was linked with the GIS-based EPIC model and the IFPSIM model through data exchange. This integrated model was then validated against the FAO statistical data in 2001-2003 and the Moderate Resolution Imaging Spectroradiometer (MODIS) global land cover product in 2001. Both validation approaches indicated reliability of the model for ad- dressing the dynamics in agricultural land use and its capability for long-term scenario analysis. Finally, the model application was designed to run over a time period of 30 a, taking the year 2000 as baseline. The model outcomes can help understand and explain the causes, locations and consequences of land use changes, and provide support for land use planning and policy making. | SHIBASAKI Ryosuke | 2008 | Science China Earth Sciences2008，51，3： | 3 |
| 13 | Integrating GPS trajectory and topics from Twitter stream for human mobility estimation显示文摘Understanding urban dynamics and large-scale human mobility will play a vital role in building smart cities and sustainable urbanization. Existing research in this domain mainly focuses on a single data source (e.g., GPS data, CDR data, etc.). In this study, we collect big and heterogeneous data and aim to investigate and discover the relationship between spatiotemporal topics found in geo-tagged tweets and GPS traces from smartphones. We employ Latent Dirichlet Allocation-based topic modeling on geo-tagged tweets to extract and classify the topics. Then the extracted topics from tweets and temporal population distribution from GPS traces are jointly used to model urban dynamics and human crowd flow. The experimental results and validations demonstrate the efficiency of our approach and suggest that the fusion of cross-domain data for urban dynamics modeling is more practical than previously thought. | Satoshi MIYAZAWA Xuan SONG Tianqi XIA Ryosuke SHIBASAKI Hodaka KANEDA | 2019 | Frontiers of Computer Science2019，13，3： | 2 |
| 14 | Web-based interactive visualization of 3D video mosaics using X3D standard显示文摘We present a method of 3D image mosaicing for real 3D representation of roadside buildings, and implement a Web-based interactive visualization environment for the 3D video mosaics created by 3D image mosaicing. The 3D image mo- saicing technique developed in our previous work is a very powerful method for creating textured 3D-GIS data without excessive data processing like the laser or stereo system. For the Web-based open access to the 3D video mosaics, we build an interactive visualization environment using X3D, the emerging standard of Web 3D. We conduct the data preprocessing for 3D video mosaics and the X3D modeling for textured 3D data. The data preprocessing includes the conversion of each frame of 3D video mosaics into concatenated image files that can be hyperlinked on the Web. The X3D modeling handles the representation of concatenated images using necessary X3D nodes. By employing X3D as the data format for 3D image mosaics, the real 3D representation of roadside buildings is extended to the Web and mobile service systems. | CHON Jaechoon LEE Yang-Won SHIBASAKI Ryosuke | 2006 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2006，7，7： | 2 |
| 15 | Reconstruction of textured urban 3D model by fusing ground-based laser range and CCD images显示文摘 | Huijing Zhao Ryosuke Shibasaki | 2000 | IEICE Trans Inf & Syst2000，83，7： | 1 |
| 16 | GPS Reflected Signal Analysis Using Software Re-ceiver 显示文摘 | Dinesh Manandhar Ryosuke Shibasaki Hideyuki Tori-moto | 2006 | Journal of Global Positioning Systems2006，5，12： | 1 |
| 17 | Asimulation system for GNSS multipath mitigation usingspatial statistical methods 显示文摘 | Lee Yang-Won Suh Yong-Cheol Ryosuke Shibasaki | 2008 | Computers & Geosciences2008，34，： | 1 |
| 18 | Ajax GIS application for GNSS availability simulation 显示文摘 | Yang-Won Lee Yongcheol Suh Ryosuke Shibasaki | 2007 | KSCE Journal of Civil Engineering2007，11，6： | 1 |
| 19 | Reconstruction of textured urban 3D model by fusing ground-based laser range and images显示文摘 | Huijing Zhao Ryosuke Shibasaki | 2000 | IEEE Trans Inf & Syst2000，83，7： | 1 |
| 20 | National spatial crop yield simulation using GIS-based crop production model显示文摘 | Satya Priya Ryosuke Shibasaki | 2001 | Ecological modeling2001，136，23： | 1 |
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