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| 1 | Fuzzy entropy image segmentation based on particle swarm optimization显示文摘Particle swarm optimization is a stochastic global optimization algorithm that is based on swarm intelligence.Because of its excellent performance, particle swarm optimization is introduced into fuzzy entropy image segmentation to select the optimal fuzzy parameter combination and fuzzy threshold adaptively.In this study, the particles in the swarm are constructed and the swarm search strategy is proposed to meet the needs of the segmentation application.Then fuzzy entropy image segmentation based on particle swarm opti-mization is implemented and the proposed method obtains satisfactory results in the segmentation experiments.Compared with the exhaustive search method, particle swarm optimization can give the same optimal fuzzy parameter combination and fuzzy threshold while needing less search time in the segmentation experiments and also has good search stability in the repeated experiments.Therefore, fuzzy entropy image segmentation based on particle swarm optimization is an eficient and promising segmentation method. | Linyi Li Deren Li | 2008 | Progress in Natural Science:Materials International2008，18，9： | 29 |
| 2 | Geomatics for smart cities-concept,key techniques,and applications显示文摘The progressive transition from digital to smart cities has become a reality in recent years.Studies on the fundamental concept of smart cities,along with their supporting techniques,have attracted unprecedented attention.This study first discusses the concept of smart cities,where it is pointed out that the real city and the digital city can be integrated into a smart city by using ubiquitous sensor networks(USN)or the Internet of Things.More intelligent services for city management and public services can be provided in smart cities through massive and complex calculation,analysis,and data mining on cloud computing platforms.A smart city’s representative characteristics are summarized here to demonstrate that smart cities are superior for offering technical securities and intelligent services.Smart municipal supervision,smart transportation,smart environment monitoring,and smart tourism are used as examples to support the discussion. | LI Deren SHAN Jie SHAO Zhenfeng ZHOU Xiran YAO Yuan | 2013 | Geo-Spatial Information Science2013，16，1： | 22 |
| 3 | 一种高效便捷的水稻DNA提取法及其应用显示文摘以水稻叶片、根和种子为材料,采用高通量快速法提取基因组DNA,用稻瘟病Pita基因分子标记进行检测,获得与预期片段大小一致的特异性条带,对165份育种材料的检测结果与稻瘟病接种鉴定一致。操作方法如下:将少量水稻叶片、根或种子放入200μL PCR盘中,加入70μL缓冲液A(含NaOH和Tween20),在PCR仪中加热到95℃,保持10min,再加入70μL缓冲液B(Tris-HCl和EDTA),该提取液可以直接用于PCR扩增。该方法具有几个优点:1)成本低,仅用4种化学试剂,共140μL提取液;2)操作简便,仅需3步,每人每天可以提取上千份样品;3)仪器设备简单,只用常规的PCR仪;4)可直接提取干种子的DNA;5)DNA质量好,能检测出水稻中的抗稻瘟病单基因Pita,并且与稻瘟病接种鉴定结果一致;6)用量少,只需要5~20mg叶片、20mg根或半粒籽粒。尤其是检测大量样本的基因型时,此种方法更显得高效便捷。 | 赵国珍 贾育林 严宗卜 Christopher W DEREN Melissa H JIA 戴陆园 | 2012 | 中国水稻科学2012，26，4： | 21 |
| 4 | Current issues in high-resolution earth observation technology显示文摘This paper reviewed the developments of the last ten years in the field of international high-resolution earth observation, and introduced the developmental status and plans for China's high-resolution earth observation program. In addition, this paper expounded the transformation mechanism and procedure from earth observation data to geospatial information and geographical knowledge, and examined the key scientific and technological issues, including earth observation networks, high-precision image positioning, image understanding, automatic spatial information extraction, and focus services. These analyses provide a new impetus for pushing the application of China's high-resolution earth observation system from a 'quantity' to 'quality' change, from China to the world, from providing products to providing online service. | LI DeRen TONG QingXi LI RongXing GONG JianYa ZHANG LiangPei | 2012 | Science China Earth Sciences2012，55，7： | 18 |
| 5 | Mining Weights of Land Evaluation Factors Based on Cloud Model and Correlation Analysis显示文摘The veracity of land evaluation is tightly related to the reasonable weights of land evaluation fac- tors. By mapping qualitative linguistic words into a fine-changeable cloud drops and translating the uncertain factor conditions into quantitative values with the uncertain illation based on cloud model, and then, inte- grating correlation analysis, a new way of figuring out the weight of land evaluation factors is proposed. It may solve the limitations of the conventional ways. | HU Shiyuan LI Deren LIU Yaolin LI Deyi | 2007 | Geo-Spatial Information Science2007，10，3： | 17 |
| 6 | China’s high-resolution optical remote sensing satellites and their mapping applications显示文摘Since the beginning of the twenty-first century,several countries have made great efforts to develop space remote sensing for building a high-resolution earth observation system.Under the great attention of the government and the guidance of the major scientific and technological project of the high-resolution earth observation system,China has made continuous breakthroughs and progress in high-resolution remote sensing imaging technology.The development of domestic high-resolution remote sensing satellites shows a vigorous trend,and consequently,a relatively stable and perfect high-resolution earth observation system has been formed.The development of high-resolution remote sensing satellites has greatly promoted and enriched modern mapping technologies and methods.In this paper,the development status,along with mapping modes and applications of China’s high-resolution remote sensing satellites are reviewed,and the development trend in high-resolution earth observation system for global and ground control-free mapping is discussed,providing a reference for the subsequent development of high-resolution remote sensing satellites in China. | Deren Li Mi Wang Jie Jiang | 2021 | Geo-Spatial Information Science2021，24，1： | 13 |
| 7 | Geo-rough Space显示文摘Rough set is a new approach to uncertainties in spatial analysis.In this paper,rough set symbols are simplified and standardized in terms of rough interpretation and specialized indication.Rough spatial entities and their topological relationships are also proposed in rough space,thus a universal intersected equation is developed,and rough membership function is further extended with the gray scale in our case study.We complete three works.First,a set of simplified rough symbols is advanced on the basis of existing rough symbols.Second,rough spatial entity is put forward to study the real world as it is,without forcing uncertainties into crisp set.Third,rough spatial topological relationships are studied by using rough matrix and their figures.The relationships are divided into three types,crisp entity and crisp entity (CC),rough entity and crisp entity (RC),and rough entity and rough entity (RR).A universal intersected equation is further proposed.Finally,the maximum and minimum maps of river thematic classification are generated via rough membership function and rough relationships in our case study. | WANG Shuliang LI Deren SHI Wenzhong WANG Xinzhou | 2003 | Geo-Spatial Information Science2003，6，1： | 12 |
| 8 | ALGORITHMS FOR TETRAHEDRAL NETWORK(TEN) GENERATION显示文摘The Tetrahedral Netwok(TEN) is a powerful 3-D vector structure in GlS, which has a lot of advantages such as simple structure, fast topological relation processing and rapid visualization. The difficulty of TEN application is automatic creating data structure. Al- though a raster algorithm has been introduced by some authors, the problems in accuracy, memory requirement, speed and integrity are still existent. In this paper, the raster algorithm is completed and a vector algorithm is presented after a 3-D data model and structure of TEN have been introducted. Finally, experiment, conclusion and future work are discussed. | LI Qingquan LI Deren | 2000 | Geo-Spatial Information Science2000，3，1： | 11 |
| 9 | The new era for geo-information显示文摘Along with the forthcoming of Google Earth,Virtual Earth,the next generation of Internet,Web 2.0,grid computing and smart sensor web,comes the new era for geo-information. In this paper,main features of new geo-information era are discussed. This new era is characterized by these features:serviced users are extended from professionals to all public users,the users are data and information providers as well,geospatial data provided are no longer measurement-by-specification but measurement-on-demand through smart sensor web,and services are transferred from being data-driven to application-driven. Such problems as out-of-order issues in geographic data collection and information proliferation,quality issues in geographic information updating,security issues in geographic information services,privacy issues in sharing geographic information and property issues in sharing geographic information,which are brought about by new geo-information era,especially those confronted in geo-information science and geo-spatial information industry,are analyzed. Then strategies concerning standards,planning,laws,technology and applications are proposed. | LI DeRen SHAO ZhenFeng | 2009 | Science in China(Series F)2009，52，7： | 11 |
| 10 | Image City sharing platform and its typical applications显示文摘In this paper,the trend of urban spatial information sharing service from the electronic map to image is analyzed and its sharing framework based on service-oriented architecture is designed.Moreover,the service implementation,feedback data service procedure and its processing service model are explored. Based on the software with independent intellectual property rights,image city of Taizhou is developed as an example to realize various image data and processing servicesLastly,the bright future prospects of image city are described. | SHAO ZhenFeng Li DeRen | 2011 | Science China(Information Sciences)2011，54，8： | 11 |
| 11 | Big data in smart cities显示文摘In this paper, we discuss the concept of the smart city, summarize its development, analyze the motivation and goals of building smart cities in China, and illustrate the supporting technologies of the smart city. Next, we propose a smart city infrastructure that is based on the concept of the digital city and integrates the Internet of Things and cloud computing technologies, thereby achieving automatic control and intelligence services for people and logistics in physical cities. We analyze the big data of smart cities according to ubiquitous sensor networks. Facing the problems and challenges caused by big data of smart cities, we propose a strategy to handle big data that focuses on cloud computing and data mining. In addition, we present a basic framework for cloud computing platforms and propose the establishment of an operating center for smart cities. In closing,we discuss the bright prospects of smart cities. | LI DeRen CAO JianJun YAO Yuan | 2015 | Science China(Information Sciences)2015，58，10： | 10 |
| 12 | Convergence of ADMM for multi-block nonconvex separable optimization models显示文摘为解决没有联合变量和抑制函数,其客观功能是二个函数的和的最小化问题是线性的, multipliers (ADMM ) 的轮流出现的方向方法展出了它的效率和它的集中很好被理解。可分离的功能的深奥数字什么时候也是超过二,或有 nonconvex 功能, ADMM 或它的直接扩大的版本不能收敛。在这份报纸,我们与深奥部件功能的凸状的线性限制和缺席认为多块是可分离的优化问题。在联系功能满足的假设下面 Kurdyka- Lojasiewicz 不平等,我们证明 ADMM 产生的反复的顺序的任何簇点是一个批评的点,在惩罚参数足够地大的温和条件下面。我们也介绍保证 sublinear 和算法的集中的线性率的一些足够的条件。 | Ke GUO Deren HAN David Z. W. WANG Tingting WU | 2017 | Frontiers of Mathematics in China2017，12，5： | 10 |
| 13 | From digital Earth to smart Earth显示文摘This article will analyze the achievements of the digital Earth concept and further introduce two key technologies,the internet of things and cloud computing.Both these technologies are accelerating the development of digital Earth toward a new concept—smart Earth.The objective of this article is to discuss the architecture,infrastructure,and typical applications for smart Earth and to elaborate on trends of the movement from digital Earth to smart Earth. | Deren Li Yuan Yao Zhenfeng Shao Le Wang | 2014 | Chinese Science Bulletin2014，59，8： | 9 |
| 14 | Investigation of the characteristics and deactivation of catalytic active center of Cr-Al_2O_3 catalysts for isobutane dehydrogenation显示文摘Deactivation mechanism of Cr-Al2O3 catalyst and the interaction of Cr-Al in the dehydrogenation of isobutane, as well as the nature of the catalytic active center, were studied using XRD, SEM, XPS, H2-TPR, isobutane-TPR and TPO techniques. The results revealed that the deactivation of Cr-Al2O3 catalyst was mainly caused by carbon deposition on its surface. The Cr3+ion could not be reduced by hydrogen but could be reduced to Cr2+by hydrocarbons and monoxide carbon. The active center for isobutane dehydrogenation could be Cr2+/Cr3+produced from Cr6+by the on line reduction of hydrocarbon and carbon monoxide. The binding energy of Al3+was strongly affected by the state of chromium cations in the catalysts. | Deren Fang Jinbo Zhao Wanjun Li Xu Fang Xin Yang Wanzhong Ren Huimin Zhang | 2015 | Journal of Energy Chemistry2015，24，1： | 8 |
| 15 | Bi_(2)S_(3) Nanotubes:Facile Synthesis and Growth Mechanism显示文摘Synthesis of tubular nanomaterials has become a prolific area of investigation due to their wide range of applications.A facile solution-based method has been designed to fabricate uniform Bi_(2)S_(3)nanotubes with average size of 20 nm×160 nm using only bismuth nitrate(Bi(NO_(3))_(3)·5H_(2)O)and sulfur powder(S)as the reactants and octadecylamine(ODA)as the solvent.Powder X-ray diffraction(XRD),transmission electron microscopy(TEM),high-resolution TEM(HRTEM),and energy dispersive spectroscopy(EDX)experiments were employed to characterize the resulting Bi_(2)S_(3)nanotubes and the classic rolling mechanism was applied to explain their formation process. | Dingsheng Wang Chenhui Hao Wen Zheng Xiaoling Ma Deren Chu Qing Peng Yadong Li | 2009 | Nano Research2009，2，2： | 8 |
| 16 | Synthesis and applications of mesoporous Cu-Zn-Al_2O_3 catalyst for dehydrogenation of 2-butanol显示文摘A series of mesoporous Cu-Zn-Al2O3 materials have been synthesized at ambient temperature and their structure was characterized by XRD, N2 physical adsorption and TPR techniques. Their catalytic applications for the dehydrogenation of 2-butanol to methyl ethyl ketone (MEK) were evaluated in a fixed-bed flow reactor at atmospheric pressure. It is demonstrated from the XRD patterns that both the as-synthesized samples and calcined samples have the typical XRD patterns of meso-structured materials and the results of N2O chemical adsorption showed that Cu was embedded in the framework of the mesoporous materials and homogeneously dispersed in the mesoporous Cu-Zn-Al2O3 materials. The catalytic activity of 2-butanol dehydrogenation was varied in the order of CZA(10) | Deren Fang Wanzhong Ren Zhongmin Liu Xiufeng Xu Lei Xu Hongying Lǔ Weiping Liao Huimin Zhang | 2009 | Journal of Natural Gas Chemistry2009，18，2： | 7 |
| 17 | Earth Observation Brain(EOB):an intelligent earth observation system显示文摘Since the twenty-first century,with the rapid development of high-resolution earth observation satellites,the earth observation satellite system has developed from the initial single satellite observation model to the current satellite constellation formed by light and small satellites observation model.All-weather and all-directional fine earth observation can now be realized.In the future,the satellite constellation,communication satellites,navigation satellites,and aircrafts are linked through dynamic linking network to form an air-space information network to realize real-time services of intelligent air-space information.To further enhance the perception,cognition,and quick response ability of the network,we propose the concept and model of the Earth Observation Brain(EOB)−the intelligent earth system based on events perception in this paper.Then,some key technologies needed to be solved in the EOB are also described.An application example is illustrated to show the process of perception and cognition in the primary stage of the EOB.In the future,EOB can observe what change of what object,the when and where to push these right information to mobile terminal of right people at the right time and right place.Global users can obtain any data,information,and knowledge in real-time through the EOB. | Deren Li Mi Wang Zhipeng Dong Xin Shen Lite Shi | 2017 | Geo-Spatial Information Science2017，20，2： | 6 |
| 18 | Land-based mobile mapping system with its applications for the Olympic Games显示文摘There is a trend for rapid spatial data capture supported by integration of multiple platforms and multiple sensors.This paper presents the principles and technologies of land-based mobile mapping systems based on an integration of remote sensing,GPS and GIS technologies.The innovations and advantages of the integrated system are described.The analytic model and error model of a mobile mapping system are proposed and the application interface of digital measurable images is also discussed.A Truemap Engine? with Plug-in and API is designed to manage a huge volume of stereo image series from a land-based mobile mapping system so that other geographic information systems(GIS) engines can freely use the sequence of stereo images.The applications of digital measurable images(DMI) as well as mobile mapping systems in the Olympic Games in Beijing,2008 are presented. | LI DeRen HU QingWu GUO Sheng CHEN ZhiYong | 2009 | Chinese Science Bulletin2009，54，13： | 6 |
| 19 | GPS/VISNAV integrated relative navigation and attitude determination system for ultra-close spacecraft formation flying显示文摘For the improvement of accuracy and better fault-tolerant performance, a global position system (GPS)/vision navigation (VISNAV) integrated relative navigation and attitude determination approach is presented for ultra-close spacecraft formation flying. Onboard GPS and VISNAV system are adopted and a federal Kalman filter architecture is used for the total navigation system design. Simulation results indicate that the integrated system can provide a total improvement of relative navigation and attitude estimation performance in accuracy and fault-tolerance. | Xiaoliang Wang Xiaowei Shao Deren Gong Dengping Duan | 2011 | Journal of Systems Engineering and Electronics2011，22，2： | 5 |
| 20 | Reducing the core loss of amorphous cores for distribution transformers | Deren Li Liang Zhang Guangmin Li Zhichao Lu Shaoxiong Zhou | 2012 | Progress in Natural Science:Materials International2012，22，3： | 5 |
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