Di Hu

Nanjing Normal University · Key Laboratory of Virtual Geographic Environment Ministry of Education

A structural landform is defined by its surface morphology, controlled by tectonics, lithology (arrangement and resistance), and folded structures, and demonstrated by the characteristics and relationships between geological and geomorphic elements. It is very important to use geographic information system (GIS) technology to accurately describe an...

Knowing the GIS expression of geological phenomena is an important basis for the combination of geology and GIS. Regional geological structures include folds, faults, strata, rocks, and other typical geological phenomena and are the focus of geological GIS research. However, existing research on the GIS expression of regional geological structure f...

Innovation is a key factor for a country’s overall national strength and core competitiveness. The spatial pattern of innovation reflects the regional differences of innovation development, which can provide guidance for the regional allocation of innovation resources. Most studies on the spatial pattern of innovation are at urban and above spatial...

Taking the mausoleums in the main urban area of Nanjing city as the study object, with the support of GIS technology, this paper extracts eight influencing factors (surface roughness, elevation, surface cutting depth, surface peaks, outfall, river system, slope, and aspect) corresponding to geomantic elements (“Long”, “Sha”, “Shui”, and “Xue”) in t...

File reading is the basis for data sharing and scientific computing. However, manual programming for file reading is labour-intensive and time-consuming, as data formats are heterogeneous and complex. To address such an issue, this study proposes a novel approach for the automatic generation of file reading programs based on structured and self-des...

Model web services provide an approach for implementing and facilitating the sharing of geographic models. The description and acquisition of inputs and outputs (IO) of geographic models is a key issue in constructing and using model web services. These approaches for describing and acquiring the data formats of the IO of geographic models can be c...

The Humen Estuary, one of the largest outlets of the Pearl River, is a long and wide tidal channel with a considerable tidal flow every year. Storm surges, always superposing spring tide, travel from the estuary and endanger the safety of people living around the river. However, little research has quantified the relationship between the hydraulic...

Based on the significant hotspots analysis method (Getis-Ord Gi* significance statistics), space-time cube model (STC) and the Mann–Kendall trend test method, this paper proposes a G-STC-M spatio-temporal analysis method based on Archaeological Sites. This method can integrate spatio-temporal data variable analysis and the space-time cube model to...

The architectural connections between western Central Asia and China are not well understood. Recent investigations at the Haermodun site in central Xinjiang reveals new evidence of the influence of western Central Asia on the construction of fortifications in China during the early first millennium AD.

The official history, chorography and family trees constitute Chinese national history. Family trees contain a large amount of information regarding Chinese society, economy, culture, population, history and geography. To make full use of family trees and help resolve related problems in the humanities and social sciences, it is important to system...

A high-resolution Finite-Volume Coastal Ocean Model (FVCOM) inundation model has been developed for Dartmouth Town near Apponagansett Bay and Clarks Cove. Series of modeling experiments were conducted for the purpose of: (1) Assess the potential impacts of the climate-induced Sea Level Rise (SLR) on the storm-induced coastal inundation in Dartmouth...

This correction contains three amendments.

Based on geographic information system (GIS) technology in conjunction with two methods for assessing landslide susceptibility (LS)—namely, a method using experts’ knowledge and experience, and a mathematical/statistical method—the LS of southern Anhui, China is assessed using an analytic hierarchy process (AHP) via an AHP-weighted information cont...

Sediment resuspension is closely related to the endogenetic release of nutrients in Lake Taihu. Thus, understanding the factors associated with sediment resuspension is important. In this study, a new technology, which integrates a hydrodynamic model and remote sensing techniques, was applied to derive the distribution of the erosion flux and obtai...

Spatial data model is a key factor in GIS research. Traditional spatial data models based on Euclidean geometry frameworks are limited in terms of unifying space-time and different objects of different dimensions owing to the complexity associated with calculating topological relationships. Thus, a new spatial data model based on geometric algebra...

Many current historical GIS platforms are so technical that their public applications are limited. To address this problem, we examine the public's needs and interests, and subsequently, select the Three Kingdoms period, a typical era of war, for our project. We select and arrange Chinese historical classics and maps to complete the design and impl...

Using GIS, data models of geology via geometric descriptions and expressions are being developed. However, the role played by these data models in terms of the description and expression of geological structure phenomenon is limited. To improve the semantic information in geological GIS data models, this study adopts an object-oriented method that...

Based on Prandtl's mixing-length theory, this study proposes new theoretical formulae of velocity profiles resulting from the forcing by a constant horizontal buoyancy gradient in unstratified and stably stratified flows. Based on the one-dimensional water column momentum equation, the vertical turbulent shearing stress profile is found to deviate...

An integrated system including eutrophication simulation and algal bloom predication was established and applied in Lake Taihu. The mechanic models, which are based on a three-dimensional numerical model coupling hydrodynamic module, pollutant transport module, suspended sediment resuspension module, wind wave module and algal bloom predication mod...

In most TVD schemes, the r-factors were proposed according to the cell-centered (CC) finite volume method (FVM) framework for the numerical approximation to the convective term. However, it is questionable whether those r-factors would be appropriate and effective for the vertex-centered (VC) FVM. In the paper, we collected five kinds of r-factor f...

In most cases, the velocity profiles of tidal currents are expressed by the classical logarithmic (log) law, through which various important friction parameters, such as the friction velocity and roughness length, can be obtained conveniently. However, the power law is not used as much as the log law in tidal current surveys because of the difficul...

In recent years, advances in computer and information science, geography, and visualization in scientific computing have brought issues such as multi-dimensional visualization, dynamic phenomenon simulation, and public participation to the fore in the field of geographic information science. Various dynamic quantitative analysis and numerical simul...

The r-ratio is a parameter that measures the local monotonicity, by which a number of high-resolution and TVD schemes can be formed. A number of r-ratio formulations for TVD schemes have been presented over the last few decades to solve the transport equation in shallow waters based on the finite volume method (FVM). However, unlike structured mesh...

The variations that characterise the design and implementation of geographical models create significant difficulties in the sharing of models. One such difficulty concerns the fact that geographical models and data are highly coupled, and various heterogeneous data formats exist. This results in a laborious and unending data format conversion proc...

Geo-analysis models are necessary tools for understanding various geo-processes and phenomena in Earth’s environment. Studying, reusing, sharing and integrating geo-analysis models can help researchers solve complicated and synthetic geo-problems with interdisciplinary knowledge, especially for researchers who collaborate with each other to build v...

In recent years, the increasing development of cloud computing technologies laid critical foundation for efficiently solving complicated geographic issues. However, it is still difficult to realize the cooperative operation of massive heterogeneous geographical models. Traditional cloud architecture is apt to provide centralized solution to end use...

Concentrating on the core elements of dialect geography, i.e. dialect investigation, design and drawing of dialect map, multi-factors based map comprehensive analysis, this paper reviews the origin of Chinese dialect geography and discusses its evolutionary process by employing the dialect map and dialect GIS, and further points out several problem...

Based on analysis of the content, structure and features of Zhujuan resumes, a text entry data model and a spatial-temporal data model of Zhujuan resume are designed for data organization and management, with the characteristics of clear classification, fine-grained information, locatable time and locatable space. The data collection of Zhujuan res...

In recent years, GIS has been extensively and intensively used in the fields of humanities and social sciences such as history, linguistics, economics and criminology. Family tree, which contains a large number of historical, geographical, cultural and other aspects of information, is one of the important elements of Chinese history.However, the va...

With the advancement of electronization and digitization of family tree, information sharing and function integration have become the bottleneck of the development and application of family tree. To address the problems such as the existing family tree systems are mutually closed and incompatible, family tree information representation is incomplet...

To address the issues of family tree information sharing, mining and spatial-temporal analyzing, this paper introduces database, network and GIS technologies into the research of family tree. It studies the mode of family tree standardization, digitization, spatialization and networking, and discusses the theory foundation, implementing techniques,...