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A New Hadrosauriform Dinosaur from the Early Cretaceous of Gansu Province,China

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Acta Geologica Sinica(English Edition) 2011年第1期85卷 51-57页

作者： YOU Hailu li daqing liU Weichang Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Gansu Geological Museum Lanzhou Gansu 730010 China Gansu Land and Resources Information Center Lanzhou Gansu 730000 China

A new basal hadrosauriform dinosaur, Xuwulongyueluni gen. et sp. nov., is reported based on an articulated specimen including a complete cranium, almost complete axial skeleton, and complete left pelvic girdle. The specimen is recovered from the Early Cretaceous Yujingzi Basin in the Jiuquan area, Gansu Province of northwestern China. Xuwulong is among the most basal members of hadrosauriform dinosaurs, and distinguished by its unique lower jaw in having a V-shaped rostral end of the dentary in lateral view and a mandibular articular surface which levels with mid-height of the dentary ramus, as well as an enlarged and downturned prepubic process. Including Xuwulong, three basal hadrosauriforms have been discovered from the Early Cretaceous Xinminpu Group in the Mazongshan area, making it an important area to study the origin and early evolution of duck-billed dinosaurs.

关键词： dinosaur hadrosauriform gen. et sp. nov. Early Cretaceous Xinminpu Group Gansu

From a single network to a network of networks

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National Science Review 2014年第3期1卷 346-356页

作者： Jianxi Gao daqing li Shlomo Havlin Department of Automation Shanghai Jiao Tong University Center for Complex Network Research and Department of Physics Northeastern University School of Reliability and Systems Engineering Beihang University Science and Technology on Reliability and Environmental Engineering Laboratory Department of Physics Bar-Ilan University

Network science has atracted much atention in recent years due to its interdisciplinary applications. We witnessed the revolution of network science in 1998 and 1999 started with small-world and scale-free networks having now thousands of high-proile publications, and it seems that since 2010 studies of‘network of networks’(NON), sometimes called multilayer networks or multiplex, have atracted more and more atention. he analytic framework for NON yields a novel percolation law for n interdependent networks that shows that percolation theory of single networks studied extensively in physics and mathematics in the last 50 years is a speciic limit of the rich and very diferent general case of n coupled networks. Since then, properties and dynamics of interdependent and interconnected networks have been studied extensively, and scientists are inding many interesting results and discovering many surprising phenomena. Because most natural and engineered systems are composed of multiple subsystems and layers of connectivity, it is important to consider these features in order to improve our understanding of such complex systems. Now the study of NON has become one of the important directions in network *** this paper, we review recent studies on the new emerging area—NON. Due to the fast growth of this ield, there are many deinitions of diferent types of NON, such as interdependent networks,interconnected networks, multilayered networks, multiplex networks and many others. here exist many datasets that can be represented as NON, such as network of diferent transportation networks including light networks, railway networks and road networks, network of ecological networks including species interacting networks and food webs, network of biological networks including gene regulation network,metabolic network and protein–protein interacting network, network of social networks and so on. Among them, many interdependent networks including critical infrastructures are embe

关键词： network of networks interdependency cascading failures spacial networks phase transition

EQUIVALENT CIRCUIT OF NONliNEAR EFFECT OF SPECTRAL IP

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中国有色金属学会会刊：英文版 1995年第4期5卷 1-7页

作者： He, Jishan li, daqing Tang, Jingtian(Department of Geology, Central South University of Technology, Changsha 410083) Central South Univ of Technology Changsha China

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关键词： spectral IP nonlinear effect equivalent circuit admittance anode/cathode polarizaTion

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On a New Genus of Basal Neoceratopsian Dinosaur from the Early Cretaceous of Gansu Province, China

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Acta Geologica Sinica(English Edition) 2005年第5期79卷 593-597页

作者： YOU Hailu li daqing JI Qiang Matthew C. LAMANNA Peter DODSON Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Fossil Research and Development Center of the Third Geology and Mineral Resources Exploration Academy of Gansu Province Lanzhou Gansu 730050 China Section of Vertebrate Paleontology Carnegie Museum of Natural History 4400 Forbes Avenue Pittsburgh PA 15213 USA Department of Animal Biology School of Veterinary Medicine University of Pennsylvania 3800 Spruce Street Philadelphia PA 19104 USA

A new genus and species of basal neoceratopsian dinosaur, Auroraceratops rugosus, is reported based on material from the Early Cretaceous Xinminpu Group in the Gongpoquan Basin of Gansu Province, China. Auroraceratops is represented by a nearly complete skull and low jaws, and different greatly from all other neoceratopsians by its considerable breadth of the nasals, fungi form expansion of the dorsal end of the lacrimal, highly developed rugosity of the jugal, dentary and surangular, and inflated, striated premaxillary teeth. The finding of Auroraceratops adds diversity and helps elucidate the evolution of basal neoceratopsian dinosaurs.

关键词： Dinosauria Neoceratopsia Early Cretaceous Xinminpu Group Gongpoquan Basin Gansu Province

Evacuation based on spatio-temporal resilience with variable traffic demand

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Journal of Management Science and Engineering 2021年第1期6卷 86-98页

作者： Zhao Zhang Yanyue liu Qingfeng Tong Shengmin Guo daqing li School of Transportation Science and Engineering Beihang UniversityNo.37 Xueyuan RoadHaidian DistrictBeijing100191China School of Reliability and Systems Engineering Beihang UniversityNo.37 Xueyuan RoadHaidian DistrictBeijing100191China National Key Laboratory of Science and Technology on Reliability and Environmental Engineering Beijing100191China State Key Laboratory of Software Development Environment Beihang UniversityNo.37 Xueyuan RoadHaidian DistrictBeijing100191China

The efficient evacuation of people from dangerous areas is a key objective of emergency ***,many emergencies give little to no advanced warning,leading to spontaneous evacuation with no time for planning or *** large emergencies,destinations become less certain,with traffic demand imbalanced and concentrated on a few oversaturated routes familiar to ***,this leads to rapid congestion and delay on some routes,while others remain barely used,extending clearance times with an accumulating population at *** this study we address these issues through incorporating spatio-temporal traffic resilience dynamics into a destination choice model utilizing the available capacity of the overall *** validate our model through a post-concert egress *** results suggest that our method can reduce total egress times and average travel time by 20%-43%over the no-guidance *** method can be used to estimate and quantify emergency conditions to optimally guide destinations and routing choice for evacuees and/or autonomously moving vehicles during evacuations.

关键词： Resilience Destination choice model Emergency evacuation Fundamental diagram

Discovery of Trace Fossils from the Sinian-Cambrian Boundary Beds in Eastern Yunnan and Their Significance for Global Correlation

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Acta Geologica Sinica(English Edition) 1993年第4期67卷 429-442,481-483页

作者： Yin Jicheng, li daqing and He Tinggui Chengdu College of Geology, Chengdu, Sichuan Fei Zhenbi Chengdu College of Geology Chengdu Sichuan

There are abundant and highly varied trace fossils in the Sinian-Cambrian boundary beds in eastern Yunnan. Collections from 27 sections and their study give altogether 45 ichnogenera and 87 ichnospecies. Among them, 2 ichnogenera and 7 ichnospecies are new, and 31 known ichnogenera and 38 known ichnospecies first found in the region. According to their order of appearance in the boundary beds and their assemblage features, the trace fossils in the Sinian-Cambrian boundary beds in the region may fall into 4 trace fossil assemblage zones in ascending order. In the paper they are correlated with those in the equivalent horizons abroad and their geological significance is discussed preliminarily.

关键词： Sinian-Cambrian boundary beds trace fossil ichnogenus ichnospecies assemblage zone eastern Yunnan

An undertaking of legacy and innovation

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2015年第1期1卷 -页

作者： daqing li Department of Otorhinolaryngology-Head & Neck Surgery University of Pennsylvania Health SystemCRB 145 145 Curie Blvd Philadelphia PA 19104 USA

After two years in development, The World Journal of Otorhinolaryngology Head & Neck Surgery has finally been *** journal aims to provide a platform for professional and scientific discussion in the field of Otorhinolaryngology: Head and Neck Surgery and related specialties viewed through the lens of a changing *** this era of global communication, the Journal aims to actively promote academic exchange and enhance collaboration between clinicians, allied health specialists, and researchers.

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Research on Distribution Regularities of Dust Concentration and Granularity in Large Mining Height Working Face

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World Journal of Engineering and Technology 2023年第2期11卷 208-216页

作者： daqing li Qingyi Tu Yang Yang Huainan Emergency Management Bureau Huainan China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Sci-ence and Technology Huainan China National Engineering Research Center for Coal Gas Control Huainan China

The key for dust control of coal mine is to clarify the dust concentration distribution and sedimentation in different areas. Both similarity experiment and numerical simulation method have certain restrictions and are quite different from the actual situation on site. In order to study the dust sedimentation regularity of coal mine in large mining height, “filter membrane method” is adopted in this paper, i.e., to dry and weigh the filter membrane before and after sampling, collect the dust of respirable zone on mining face and calculate the dust concentration based on a main airway of 100 m. The result shows that: A large amount of dust will be produced during coal mining, wherein the maximum dust concentration from 6 m upstream to 100 m downstream of coal cutter is 121 mg/m3, while the minimum dust concentration is 61 mg/m3;The dust concentration in return airway is reduced with the distance increases, while the dust concentration at the entrance is 91 mg/m3;A large amount of dust may fall from roof during section advancing and improves the dust concentration of hydraulic support in walking area obviously;The dust granularity of mining face and return airway is 0 - 100 μm, but the amount of respirable dust is higher than 80%, the larger the dust particle size, the higher the dust concentration. Besides, dust in small particle size can be suspended in air flow for longer, but that in large particle size may subside under the action of gravity;To reduce dust exposure, the mining position shall be located in the windward direction of advancing or coal cutter. This research can provide guidance for taking dust prevention measures of working face in large mining height.

关键词： Safety Science and Engineering Dust Concentration Filter Membrane Method Particle Size Distribution Respirable Dust

A Large Therizinosauroid(Dinosauria:Theropoda) from the Early Cretaceous of Northwestern China

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Acta Geologica Sinica(English Edition) 2007年第4期81卷 539-549页

作者： li daqing PENG Cuo YOU Hailu Matthew C. LAMANNA Jerald D. HARRIS Kenneth J. LACOVARA ZHANG Jianping China University of Geosciences School of Earth Sciences and Resources Beijing 100083 P. R. China Fossil Research and Development Center of the Third Geology and Mineral Resources Exploration Academy of Gansu Province Lanzhou Gansu Province 730050 P. R. China Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 P. R. China Section of Vertebrate Paleontology Carnegie Museum of Natural History Pittsburgh Pennsylvania 15213 USA Dixie State College Science Building Utah 84770 USA Paleontology and Geology Program Department of Bioscience and Biotechnology Drexel University Philadelphia Pennsylvania 19104 USA

We herein describe an associated partial postcranial skeleton of a theropod dinosaur discovered in the Lower Cretaceous Xinminpu Group of the Yujingzi Basin, in the Jiuquan area of Gausu Province, northwestern China. Features of its humerus, such as strongly expanded proximal and distal ends, a well developed medial tuberosity, distal condyles expressed on the humeral cranial surface, and a hypertrophied entepicondyle, definitively establish the therizinosauroid affinities of the specimen. It differs from other therizinosauroids in having a shallow, poorly demarcated glenoid fossa with a prominent rounded and striated tumescence on the dorsomedial surface of its scapular portion, and a pubis with a strongly concave cranial margin. It represents a new taxon, Suzhousaurus megatherioides gen. et sp. nov. Cladistic analysis recovers Suzhousaurus as the sister taxon of Nothronychus mckinleyi from the mid-Cretaceous of western North America; together, they are basal members of the Therizinosauroidea, more derived than the Early Cretaceous Falcarius and Beipiaosaurus but less derived than Alxasaurus and the Therizinosauridae. Along with ＂Nanshiungosaurus＂ bohlini from possibly coeval beds in the Mazongshan area of northern-most Gansu, Suzhousaurus represents one of the largest-known Early Cretaceous therizinosauroids, demonstrating that this clade attained considerable body size early in its evolutionary history.

关键词： Dinosauria Theropoda Therizinosauroidea Yujingzi Basin Early Cretaceous Jiuquan area Gansu Province China