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| 1 | Geographic analysis-oriented Virtual Geographic Environment:Framework,structure and functions显示文摘Previous research on the Virtual Geographic Environment(VGE) has focused mainly on representation rather than geographic analysis.However,geographic analysis plays a significant role in modern geography.To address this issue,this paper systematically examines theories and implementing VGE techniques that support geographical analysis and simulation.Based on its framework,VGE can be divided into four subtypes.These are the data environment,modeling environment,expression environment,and collaborative environment.The functions and key techniques of each are examined,and some case studies are discussed.This study provides direction for necessary new developments of advanced VGE platforms. | LU GuoNian | 2011 | Science China Earth Sciences2011，54，5： | 18 |
| 2 | ENSO signals and their spatial-temporal variation characteristics recorded by the sea-level changes in the northwest Pacific margin during 1965-2005显示文摘Sea-level is closely linked to the Earth's climate and its change is important as a metric for global and regional climate change. Identifying, extracting, and revealing such information through detailed analysis is the prerequisite for understanding the mechanisms of sea-level change. The monthlyaverage tide-change records reported and examined in this paper are from 10 tide gauge stations distributed in the northwest margin of the Pacific Ocean, registered during the period 1965-2005. In particular, we have utilized the Second Order Blind Identification (SOBI) method to identify and the Empirical Mode Decomposition (EMD) method to extract the El Nio-Southern Oscillation (ENSO) signals imprinted in those tide gauge records; and subsequently, we have investigated the spa-tial-temporal characteristics of the extracted ENSO signals using wavelet analysis methods. The following results are obtained: (1) the ENSO events recorded by each tide gauge series are of different types and intensity, which show considerable temporal-spatial variation characteristics, with sea-level responses to ENSO signals remarkably stronger in low latitude areas than in medium-high latitude areas; (2) due to the influences of ocean currents, topographical conditions, and other factors, there exist variations in the type of relationship between the sea-level changes and the recorded ENSO events at different latitudes; (3) sea-level changes can also denote scale-variation characteristics of ENSO events, and particularly, since 1980s, all the tide gauges located south of Kanmen show intense responses to ENSO and the timescale of ENSO events extended gradually from around 4 years to 2-8 years, reflecting variations in the intensity and frequency of ENSO events; and (4) reverse changes of certain scale were noted before and after strong ENSO events recorded by sea-level changes, supporting the research findings about the interaction (mutual coupling and superimposition) between the probability of occurrence of strong ENSO events and their time scale. | YUAN LinWang,YU ZhaoYuan,XIE ZhiRen,SONG ZhiYao & Lü GuoNian School of Geographical Science,Nanjing Normal University,Nanjing 210046,China | 2009 | Science China Earth Sciences2009，52，6： | 14 |
| 3 | Chinese progress in geomorphometry显示文摘Geomorphometry,the science of digital terrain analysis(DTA),is an important focus of research in both geomorphology and geographical information science(GIS).Given that 70% of China is mountainous,geomorphological research is popular among Chinese scholars,and the development of GIS over the last 30 years has led to significant advances in geomorphometric research.In this paper,we review Chinese progress in geomorphometry based on the published literature.There are three major areas of progress:digital terrain modelling methods,DTA methods,and applications of digital terrain models(DTMs).First,traditional vector-and raster-based terrain modelling methods,including the assessment of uncertainty,have received widespread attention.New terrain modelling methods such as unified raster and vector,high-fidelity,and real-time dynamic geographical scene modelling have also attracted research attention and are now a major focus of digital terrain modelling research.Second,in addition to the popular DTA methods based on topographical derivatives,geomorphological features,and hydrological factors extracted from DTMs,DTA methods have been extended to include analyses of the structure of underlying strata,ocean surface features and even socioeconomic spatial structures.Third,DTMs have been applied to fields including global climate change,analysis of various typical regions,lunar surface and other related fields.Clearly,Chinese scholars have made significant progress in geomorphometry.Chinese scholars have had the greatest international impact in areas including high-fidelity digital terrain modelling and DTM-based regional geomorphological analysis,particularly in the Loess Plateau and the Tibetan Plateau regions. | LV Guonian XIONG Liyang CHEN Min TANG Guoan SHENG Yehua LIU Xuejun SONG Zhiyao LU Yuqi YU Zhaoyuan ZHANG Ka WANG Meizhen | 2017 | Journal of Geographical Sciences2017，27，11： | 14 |
| 4 | Satellite SAR interferometric observations of displacements associated with urban subsidence in Suzhou, Eastern China显示文摘SAR interferometry (InSAR) has a high potential for surface displacement mapping in the range from millimeter to meter. In this paper the potential of ERS-1/2 SAR interferometry for mapping subtle land subsidence has been investigated. A time series of ERS-1/2 SAR data from February 1993 to February 2000 is collected from measurements taken in Suzhou city, Jiangsu Province, China, eight ERS-1/2 SAR images are used to create seven interferograms, and three differential interferograms are produced using the three-pass method, which clearly show the spatial extent of land subsidence. The deformation maps are validated by leveling surveys, the correlation coefficient and standard deviation between them are 0.943 and 0.1706 respectively. Based on seven benchmarks, the subsidence rates are estimated, the overall trends are in close agreement with InSAR results. The results of study show that for the mapping of land subsidence in urban environments InSAR has a strong potential due to its cost-saving, high resolution and accuracy. | WANG Chao, ZHANG Hong, LIU Zhi, CHENG Suozhong and LU Guonian(1. LARSIS, Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101, China 2. Department of Geography, Nanjing Normal University, Nanjing 210097, China) | 2002 | Progress in Natural Science:Materials International2002，12，10： | 13 |
| 5 | Geometric algebra method for multidimensionally-unified GIS computation显示文摘Seamless multidimensional handling and coordinate-free characteristics of geometric algebra (GA) provide means to construct multidimensionally-unified GIS computation models. Using the multivector representation for basic geometric objects within GA, we are able to construct adaptable unified geometric-topological structural models of a multidimensional geographical scene. Multidimensional operators found within the geometry, topology and GIS analysis are developed with basic GA operators. A unified computational framework is proposed, it unifies expressions and operation structures, as well as supports the analysis of multidimensional complex scenes. Finally, we illustrate modelling a three-dimensional residential district, which shows that GAbased multidimensionally-unified computation models can effectively represent and analyze complex and multidimensional geographical scenes. The development of the proposed GIS multidimensionally-unified representation, analysis, and modeling enhances current GIS algorithms and geographical models. | YUAN LinWang LüGuoNian LUO Wen YU ZhaoYuan YI Lin SHENG YeHua | 2012 | Chinese Science Bulletin2012，57，7： | 13 |
| 6 | A new geographical language: A perspective of GIS显示文摘语言在通讯起一个重要作用,分享并且在人之中的信息的传播。地理语言为理解是必要的,调查,表示并且宣传 geo 空间的信息。地理语言在科学,技术和认知层次与改进逐渐地发展了并且演变。有关从地理信息本体论,认识论和语言学理论的理论进步,这份报纸第一提出一种 GIS 语言的概念并且在地理语言的结构,功能和特征根据变化讨论它的基本特征。这种 GIS 语言能被认为是合成数字符号的一个系统。它是地理目标,现象和他们的空间分布和动态过程的一个全面代表。这个代表帮助我们与几何学,地位,进程,时间空间的关系,语义和属性用地理情形或符号产生地理空格的一种通用感觉。而且,这份报纸声明 GIS 语言由于它的内在的特征,结构,功能和系统的内容代表地理语言的新一代。基于上述的理论基础,这份报纸从地理研究人员的观点说明 GIS 语言的枢轴的地位和贡献。GIS 的语言是为当前的时代设计的一种新地理语言,与包括时间空间的多尺寸表示,交互可视化,虚拟地理情形,多传感器感觉并且经由网的有用广播的特征。GIS 语言是迄今为止开发的高度级的地理语言,集成语义定义,特征抽取,地理动态表示和时间空间的因素并且统一地理现象和目标的计算。GIS 语言拥有五个重要特征:抽象,系统,严格,精确和层次。在摘要, GIS 语言提供一个新工具让人认出,理解并且模仿全部 geo 环境。因此,在当代的地理开发的 GIS 语言功能的探索正在变得日益重要。同样,概念的模型的建设和 GIS 语言的科学系统将支持地理和地理信息科学的学科的开发。因此,这份报纸从数字技术,地理标准,地理建模和地理的纪律发展的观点调查 GIS 语言的前景。 | HU Zui TANG Guoan LU Guonian | 2014 | Journal of Geographical Sciences2014，24，3： | 7 |
| 7 | Distribution of chlorpyrifos in rice paddy environment and its potential dietary risk显示文摘Chlorpyrifos is one of the most extensively used insecticides in China. The distribution and residues of chlorpyrifos in a paddy environment were characterized under field and laboratory conditions. The half-lives of chlorpyrifos in the two conditions were 0.9–3.8 days(field) and 2.8–10.3 days(laboratory), respectively. The initial distribution of chlorpyrifos followed the increasing order of water < straw < soil, and soil was characterized as the major absorber. The ultimate residues in rice grain were below the maximum residue limit(MRL) with a harvest interval of 14 days. The chronic exposure for chlorpyrifos was rather low compared to the acceptable daily intake(ADI = 0.01 mg/kg bw) due to rice consumption. The chronic exposure risk from chlorpyrifos in rice grain was 5.90% and 1.30% ADI from field and laboratory results respectively. Concerning the acute dietary exposure,intake estimated for the highest chlorpyrifos level did not exceed the acute reference dose(ARf D = 0.1 mg/kg bw). The estimated short-term intakes(ESTIs) were 0.78% and 0.25% of the ARf D for chlorpyrifos. The results showed that the use of chlorpyrifos in rice paddies was fairly safe for consumption of rice grain by consumers. | Yan Fu Feifei Liu Chenglin Zhao Ying Zhao Yihua Liu Guonian Zhu | 2015 | Journal of Environmental Sciences2015，27，9： | 5 |
| 8 | Geographic scenario:a possible foundation for further development of virtual geographic environments显示文摘It has been two decades since virtual geographic environments(VGEs)were initially proposed.While relevant theories and technologies are evolving,data organization models have always been the foundation of VGE development,and they require further exploration.Based on the comprehensive consideration of the characteristics of VGEs,geographic scene is proposed to organize geographic information and data.We empirically find that geographic scene provides a suitable organization schema to support geo-visualization,geo-simulation,and geo-collaboration.To systematically investigate the concept and method of geographic scene,Geographic Scenario is proposed as the theory on developing geographic scene,and corresponding key issues of the Geographic Scenario are illustrated in this article.Prospects of the proposed method are discussed with the hope of informing future studies of VGEs. | Guonian Lü Min Chen Linwang Yuan Liangchen Zhou Yongning Wen Mingguan Wu Bin Hu Zhaoyuan Yu Songshan Yue Yehua Sheng | 2018 | International Journal of Digital Earth2018，11，4： | 4 |
| 9 | Information geography: A new fulcrum of geographic ternary world显示文摘The development trend of ternary space requires the construction of the information space for information mapping,transmission and transformation of geographic elements and social-human elements. Relevant researches of information geography from the perspective of Geographic Information Science and human geography are reviewed in this paper, then the concept interpretation of information geography from the perspective of ternary space is proposed. It is presented in this paper that information geography can be constructed with a framework using seven geographic elements as the basic expressing dimensions and seven social-human elements as the basic aggregating core. Information geography analyzes spatio-temporal distribution, structural characteristics, evolution process and interactions of various elements in the information space. And it eventually realizes the actual description, multi-scenario simulation, multi-objective decision-making and multi-channel control of the physical world and the social-human world. | Guonian LÜ Linwang YUAN Zhaoyuan YU | 2022 | Science China Earth Sciences2022，65，2： | 4 |
| 10 | Geographic modeling and simulation systems for geographic research in the new era: Some thoughts on their development and construction显示文摘Regionality,comprehensiveness,and complexity are regarded as the basic characteristics of geography.The exploration of their core connotations is an essential way to achieve breakthroughs in geography in the new era.This paper focuses on the important method in geographic research:Geographic modeling and simulation.First,we clarify the research requirements of the said three characteristics of geography and its potential to address geo-problems in the new era.Then,the supporting capabilities of the existing geographic modeling and simulation systems for geographic research are summarized from three perspectives:Model resources,modeling processes,and operational architecture.Finally,we discern avenues for future research of geographic modeling and simulation systems for the study of regional,comprehensive and complex characteristics of geography.Based on these analyses,we propose implementation architecture of geographic modeling and simulation systems and discuss the module composition and functional realization,which could provide theoretical and technical support for geographic modeling and simulation systems to better serve the development of geography in the new era. | Min CHEN Guonian LV Chenghu ZHOU Hui LIN Zaiyang MA Songshan YUE Yongning WEN Fengyuan ZHANG Jin WANG Zhiyi ZHU Kai XU Yuanqing HE | 2021 | Science China Earth Sciences2021，64，8： | 3 |
| 11 | Video Scene Invariant Crowd Density Estimation Using Geographic Information Systems显示文摘Crowd density is an important factor of crowd stability.Previous crowd density estimation methods are highly dependent on the specific video scene.This paper presented a video scene invariant crowd density estimation method using Geographic Information Systems(GIS) to monitor crowd size for large areas.The proposed method mapped crowd images to GIS.Then we can estimate crowd density for each camera in GIS using an estimation model obtained by one camera.Test results show that one model obtained by one camera in GIS can be adaptively applied to other cameras in outdoor video scenes.A real-time monitoring system for crowd size in large areas based on scene invariant model has been successfully used in 'Jiangsu Qinhuai Lantern Festival,2012'.It can provide early warning information and scientific basis for safety and security decision making. | SONG Hongquan LIU Xuejun LU Guonian ZHANG Xingguo WANG Feng | 2014 | China Communications2014，11，11： | 2 |
| 12 | On the universal third order Stokes wave solution显示文摘This paper presents a universal third-order Stokes solution with uniform current. This solution is derived on the basis of potential theory by expanding the free surface and potential function in Fourier series and determining the Fourier coefficients by solving a set of nonlinear algebraic equations through the Taylor expansion and perturbation method. The universal solution is expressed upon the still water depth with the still water level as datum and retains a global perturbation parameter. The wave set-up term generated by the self-interaction of oscillatory waves is explicitly included in the free surface function. With the use of different definitions for the wave celerity, different water levels as the datum, different non-dimensional variables as the perturbation parameter, and different treatments for the total head, the universal solution can be reduced to the existing various Stokes solutions, thus explaining the reasons and the physical significance of different non-periodic terms in them, such as the positive or negative constant term in the free surface expression and the time-or space-proportional term in the potential function. | SONG ZhiYao ZHAO HongJun LI Ling Lü GuoNian | 2013 | Science China Earth Sciences2013，56，1： | 2 |
| 13 | Automatic Placement of GIS Vector Map Annotation in Area Feature by Long Diagonal显示文摘This paper discusses the placement of Chinese annotation from point of view of graphics. Area Feature is classified as simple polygon, complex polygon and special polygon. For simple ones, annotations are placed along the longest edge. For complex ones, firstly the polygon are simplified according to close points, then the longest diagonal is gotten by comparing length, lastly, annotations are placed along long diagonal. For special ones, the polygon are partitioned into several parts by a certain rule for getting their sub\|diagonals, then their annotation are placed by means of the second. | LAN Xiaoji JIANG Yongfa Lü Guonian DENG Huamei | 2005 | Geo-Spatial Information Science2005，8，4： | 2 |
| 14 | 1.3 μm Emission from Nd^(3+)-doped Tellurite Glass Fiber显示文摘1 wt pct Nd2O3-doped tellurite bulk glass and fiber with the same composition of 75TeO2-15ZnO-5Na2O-5Li2O (molfraction, %) were fabricated. Judd-Ofelt analysis was carried out for the bulk. The emission from the 4F3/2→4I13/2 transition in fiber is at 1.33 μm wavelength with a spectral bandwidth of 55 nm, which is similar to that in bulk. In the case of the fiber, the lifetime of 4F3/2 level is 164μs, and the quantum efficiency is ~100%. The figure-of-merit for gain (σoT0) for Nd3+-doped tellurite glass is about 2.8×10-24 cm2.s, which is quite comparable with that in Nd3+-doped fluoroaluminate glasses, and is an order of magnitude larger than pr3+-doped fluoride glasses. | Shixun DAI, Junjie ZHANG, Shunguang LI, Jianhu YANG, Shiqing XU, Guonian WANG and Lili HUShanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China | 2004 | Journal of Materials Science & Technology2004，20，6： | 1 |
| 15 | Preparation and ASE Spectrum of a Single-Mode Erbium Doped Tellurite Glass Fiber with D-type Cladding Geometry显示文摘Based on the host of tellurite glasses, the glass formation, preform manufacture, and fiber fabrication are described. The characterization of amplified spontaneous emission (ASE) from this newly fabricated single-mode Er3+-dopedtellurite fibers is also presented. When pumped at 980 nm, a very broad erbium ASE around 1.53μm was observed. The variations of ASE with fiber length and pumping power are measured and discussed. The output of 2 mW from Er3+-doped tellurite fiber ASE source was obtained under the pump power of 660 mW. | Junjie ZHANG, Shixun DAI, Guonian WANG, Shiqing XU, Shunguang LI and Lili HUShanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China | 2004 | Journal of Materials Science & Technology2004，20，6： | 1 |
| 16 | Prototyping an open environment for sharing geographical analysis models on cloud computing platform显示文摘The sharing of geographical analysis models is of crucial importance for simulating geographic processes and phenomena in the current geographical information systems(e.g.Digital Earth),but there remain some issues that have not been completely resolved.The challenges include,eliminating model heterogeneity and searching for suitable infrastructures to support the open sharing and effective execution of models.Taking advantage of cloud computing,this article aims to address the above issues and develop an open environment for geographical analysis model sharing.On the basis of the analysis of the applicability of cloud computing,the architecture of the open environment is proposed.More importantly,key strategies designed for heterogeneous model description,model encapsulating as well as model deploying and transparent accessing in the cloud are discussed in detail to establish such an environment.Finally,the prototype environment is implemented,and experiments were conducted to verify the environment’s feasibility to support the sharing of geographical analysis models. | Yongning Wen Min Chen Guonian Lu Hui Lin Li He Songshan Yue | 2013 | International Journal of Digital Earth2013，6，4： | 1 |
| 17 | Infrared, Raman and XPS spectroscopic studies of BizO3-B203-Ga203 glasses显示文摘 | Fan Huiyan Wang Guonian Hu Lili | 2009 | Solid State Sciences2009，11，12： | 1 |
| 18 | A framework on task configuration and execution for distributed geographical simulation显示文摘Geographical simulation is a popular method in geographical and environmental research.Many models developed to address geographic and environmental issues are distributed worldwide.However,due to the lack of portals,these models are still difficult to invoke for geographical simulations in open web environments.This study designs and develops a framework to assemble service-oriented models from volunteers distributed worldwide for geographical simulations on the web.The framework consists of three layers(task layer,data exchange layer,and model execution layer)that establish a network of serviceoriented locally shared models and simulation tasks for user configurations.With the help of such a framework,users can configure simulation tasks and invoke suitable models shared worldwide for geographical simulations.This article provides an application of the distributed simulation of gross primary production(GPP)by the Biome-BioGeochemical Cycles(BGC)model in China.This application shows that the framework can be beneficial for model assembly from volunteers’computers and distributed simulation tasks that are run for geographical and environmental issues,which can be applied to Digital Earth initiatives. | Fengyuan Zhang Min Chen Ming Wang Zihuan Wang Shuo Zhang Songshan Yue Yongning Wen Guonian Lü | 2021 | International Journal of Digital Earth2021，14，9： | 1 |
| 19 | The effect of tramadol on serum cytokine response in patients undergoing pulmonary lobectomy 显示文摘 | Guonian Wang Yiqi Weng Yoshiki Ishiguro | 2005 | Clin Anesth2005，17，： | 1 |
| 20 | 显示文摘 | Xu Shiqing Wang Guonian Zhang Junjie | 2004 | Journal of Non-Crystalline Solids2004，336，： | 1 |
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