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Tibetan Plateau: An evolutionary junction for the history of modern biodiversity

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Science China Earth Sciences 2020年第2期63卷 172-187页

作者： tao deng Feixiang WU Zhekun ZHOU tao SU Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesXishuangbanna 666303China

Holding particular biological resources,the Tibetan Plateau is a unique geologic-geographic-biotic interactively unite and hence play an important role in the global biodiversity *** Tibetan Plateau has undergone vigorous environmental changes since the Cenozoic,and played roles switching from"a paradise of tropical animals and plants"to"the cradle of Ice Age mammalian fauna".Recent significant paleontological discoveries have refined a big picture of the evolutionary history of biodiversity on that plateau against the backdrop of major environmental changes,and paved the way for the assessment of its far-reaching impact upon the biota around the plateau and even in more remote ***,based on the newly reported fossils from the Tibetan Plateau which include diverse animals and plants,we present a general review of the changing biodiversity on the Tibetan Plateau and its influence in a global *** define the Tibetan Plateau as a junction station of the history of modern biodiversity,whose performance can be categorized in the following three patterns:(1)Local origination of endemism;(2)Local origination and"Out of Tibet";(3)Intercontinental dispersal via *** first pattern is exemplified by the snow carps,the major component of the freshwater fish fauna on the plateau,whose temporal distribution pattern of the fossil schizothoracines approximately mirrors the spatial distribution pattern of their living *** ascent with modification,their history reflects the biological responses to the stepwise uplift of the Tibetan *** second pattern is represented by the dispersal history of some mammals since the Pliocene and some *** ancestors of some Ice Age mammals,e.g.,the wholly rhino,Arctic fox,and argali sheep first originated and evolved in the uplifted and frozen Tibet during the Pliocene,and then migrated toward the Arctic regions or even the North American continent at beginning of the Ice Age;the ancestor of panthe

关键词： Tibetan Plateau Cenozoic Biodiversity Evolution Plants Fish Mammals

Paleoaltimetry reconstructions of the Tibetan Plateau:progress and contradictions

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National Science Review 2015年第4期2卷 417-437页

作者： tao deng Lin Ding Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of Sciences CAS Center for Excellence in Tibetan Plateau Earth Sciences Key Laboratory of Continental Collision and Plateau Uplift Institute of Tibetan Plateau ResearchChinese Academy of Sciences

Over the last two decades, many quantitative paleoaltimetry reconstructions of the Tibetan Plateau have been published, but they are still preliminary and controversial, although several approaches have been combined paleontology and geochemistry, including vertebrate, plant, and pollen fossils as well as oxygen,carbon, and hydrogen isotopes. he Tibetan Plateau is the youngest and highest plateau on Earth, and its paleoaltimetry reconstructions are crucial to interpret its geodynamic evolution and to understand the climatic changes in Asia. Uplit histories of the Tibetan Plateau based on diferent proxies difer considerably, and two viewpoints are pointedly opposing on the paleoaltimetry estimations of the Tibetan Plateau. One viewpoint is that the Tibetan Plateau did not strongly uplit to reach its modern elevation until the Late Miocene, but another one, mainly based on stable isotopes, argues that the Tibetan Plateau formed early during the Indo-Asian collision and reached its modern elevation in the Paleogene or by the Middle Miocene. With either a geochemical or paleontological approach, the present is used as the key to the ***, there are great diiculties because modern processes of isotopic fractionation and species for creature distribution are not easily precisely determined. In addition, the climatic and environmental backgrounds of past geological times have massive diferences from the present, and associated adjustments are inluenced by many human factors. In the future work, the applications of multidisciplinary comprehensive methods and cross-checks of their results will be productive, and we look forward to achieving more reliable estimates for paleoelevations of the Tibetan Plateau.

关键词： Tibetan Plateau Cenozoic paleoelevation paleontology stable isotope

The first Choerolophodon (Proboscidea, Gomphotheriidae) skull from China

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Science China Earth Sciences 2011年第9期54卷 1326-1337页

作者： WANG ShiQi deng tao Key Laboratory of Evolutionary Systematics of Vertebrates Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China

Here we report the first discovery of a relatively complete skull of Choerolophodon from the late early Miocene Dalanggou quarry of Linxia Basin, Gansu Province in China. The skull is low and elongated, with two enamel-less and out ward-and-upward curved incisors and the choerolophodont molars. These characters indicate that the new specimen can be as signed to the genus Choerolophodon, as it is quite distinct from other common gomphotheres in northern China such as Gom photherium, Platybelodon, and Sinomastodon. The skull is also primitive in possessing laterally-expanded zygomatic arches, anteriorly-positioned orbits, weakly-developed cheek teeth cement, and retention of a P4. Prior to this discovery, Cho erolophodon was found primarily from the middle-late Miocene of Africa, Eastern Europe, and western and southern Asia. The discovery of this new material expands the known temporal and spatial distributions of this taxon and helps us better un derstand the phylogeny, evolution, and adaptive radiation of gomphotheres in early Miocene of China.

关键词： gomphotheres Choerolophodon Linxia Basin early Miocene China

Neogene integrative stratigraphy and timescale of China

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Science China Earth Sciences 2019年第1期62卷 310-323页

作者： tao deng Sukuan HOU Shiqi WANG Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences CAS Center for Excellence in Life and Paleoenvironment Department of Earth Sciences University of Chinese Academy of Sciences Department of Earth Sciences Nanjing University

The widely exposed Chinese Neogene terrestrial deposits provide the best circumstance for the establishment of an accurate chronostratigraphic system of Eurasia, and the rapidly evolved mammalian fossils contribute efficiently to the division and correlation of Asian Neogene strata. A uniform Neogene biostratigraphic framework for China has already been established,with seven mammalian ages named. With a developed stratigraphic basis for the geochronologic "ages", seven chronostratigraphic "stage" have been established for the Chinese Neogene terrestrial strata, namely the Miocene Xiejian, Shanwangian,Tunggurian, Bahean, and Baodean stages, and the Pliocene Gaozhuangian and Mazegouan stages. Based on a series of research achievements, refined biostratigraphic, paleomagnetic and isotopic methods were combined and applied to continuous sections,and a Chinese Neogene chronostratigraphic sequence with accurate geological ages was established and improved in recent years. The lower boundaries of most of the stages could be correlated with those of the marine stages in the International Chronostratigraphic Chart, except the Tunggurian Stage, which is correlated with the European land mammal age. The biostratigraphic markers of the Chinese Neogene stages are usually first appearance of a single taxon, some representing regional species replacement, others indicating intercontinental migration of certain taxa. Candidate stratotype sections have been proposed for all the Chinese Neogene stages according to the principle and rule of modern stratigraphy, and other Chinese Neogene strata in different regions are comprehensively correlated.

关键词： Neogene Stage/age Mammal Biostratigraphy Chronostratigraphy Magnetostratigraphy China

The Tibetan Plateau is a natural laboratory for studying organic evolution and environmental change

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Science China Earth Sciences 2020年第2期63卷 169-171页

作者： Zhekun ZHOU tao deng Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesXishuangbanna 666303China Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044China University of Chinese Academy of Sciences Beijing 100049China

Today’s fauna and flora are a continuation from their geological past. In order to better understand how patterns of biodiversity form and organic evolution takes place, it is necessary to study these flora and fauna... 详细信息

关键词： Plateau Tibetan evolution

Puncture Phenomena and Mechanism Analysis of a RTV Coated Cap and Pin Insulators in a Steep-front Impulse Voltage Test

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CSEE Journal of Power and Energy Systems 2021年第4期7卷 832-839页

作者： tao deng Xidong Liang Zhiyi Su Jun Zhou Electrical Engineering Department Tsinghua UniversityBeijing 100084Chinaand also with Department of High VoltageChina Electric Power Research Institute Co.LtdBeijing 100192China Department Tsinghua UniversityBeijing 100084China Department of High Voltage China Electric Power Research Institute Co.LtdBeijing 100192China

In recent years,more than 6 million room temperature vulcanized(RTV)silicone rubber coated cap and pin insulators with high mechanical ratings were used in ultra-high voltage transmission lines in China to improve pollution ***,the unexpected puncture phenomena of RTV coated insulators were exposed during steep-front impulse voltage tests;for instance,the steep-front impulse voltage test pass rate decreased to less than 50% for 550 kN glass insulators with RTV *** steep-front impulse voltage test is the most effective method used to check the insulation quality of cap and pin insulators・This unexpected phenomenon once caused serious concerns to power *** this paper,several possible factors that affect the puncture of insulators were ***,the extent of the decline in the breakdown of the 550 kN glass cap and pin insulators with and without RTV coatings were *** initial puncture location was then found,and the developmental process of the arc on the insulator surface in steep-front impulse voltage tests was observed with an ultra-high-speed intensified charge coupled device ***,a breakdown mechanism is *** puncture phenomena of a RTV coated insulator in a steep-front impulse voltage test is essentially an electrical breakdown of the internal insulation・The RTV coating induces the close adherence of the arc to the surface of the *** closeness changes the arc development path on the insulator surface and facilitates easy breakdown in the shed weak *** these factors result in a significant increase in the breakdown probability of RTV coated insulators in steepfront impulse voltage tests.

关键词： Cap and pin insulator puncture RTV coating steep-front impulse voltage test

Pliocene flora and paleoenvironment of Zanda Basin, Tibet, China

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Science China Earth Sciences 2020年第2期63卷 212-223页

作者： Jian HUANG tao SU Shufeng LI Feixiang WU tao deng Zhekun ZHOU CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesXishuangbanna 666303China University of Chinese Academy of Sciences Beijing 100049China Kunming Institute of Botany Chinese Academy of SciencesKunming 650201China Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of SciencesBeijing 100044China Center for Excellence in Life and Paleoenvironment Chinese Academy of SciencesBeijing 100044China

This paper describes a plant megafossil assemblage from the Pliocene strata of Xiangzi, Zanda Basin in the western Qinghai-Tibet Plateau. Twenty-one species belonging to 12 genera and 10 families were identified. Studies show that the Pliocene vegetation in Zanda Basin was mostly deciduous shrub composed of Cotoneaster, Spiraea, Caragana, Hippophae,Rhododendron, Potentilla fruticosa, etc. Leaf sizes of these taxa were generally small. Paleoclimate reconstruction using Coexistence Analysis and CLAMP showed that this area had higher temperature and precipitation in the Pliocene than today, and distinct seasonal precipitation variability was established. The reconstructed paleoelevation of Zanda Basin in the Pliocene was similar to modern times. In the context of central Asian aridification, the gradual drought in the area beginning in the late Cenozoic caused vegetation to transition from shrub to desert, and the flora composition also changed.

关键词： Qinghai-Tibet Plateau Cenozoic Pliocene Plant fossils Paleovegetation Paleoclimate Environmental change

Driving as well as on a Sunny Day? Predicting Driver’s Fixation in Rainy Weather Conditions via a Dual-Branch Visual Model

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IEEE/CAA Journal of Automatica Sinica 2022年第7期9卷 1335-1338页

作者： Han Tian tao deng Hongmei Yan MOE Key Laboratory for Neuroinformation the School of Life Science and TechnologyUniversity of Electronic Science and Technology of ChinaChengdu 610054China School of Information Science and Technology Southwest Jiaotong UniversityChengdu 611756China IEEE

Dear Editor,Traffic driving is a dynamic and complicated task in which drivers are required to pay close attention to the important targets or regions to maintain safe *** weather conditions make it more challenging with factors such as low visibility,raindrops,pedestrian with umbrellas,wipers,*** showed that rainy condition affects driving safety significantly[1],[2].It is reported that,in raining weather condition,the odds for a fatal accident are 3.340 times higher on highways than on streets[3].An investigation of the relationship between rainfall and fatal crashes in Texas from 1994 to 2018 on fatality analysis reporting system(FARS)database illustrated that rain-related fatal crashes represented about 6.8%of the total fatal crashes on average,moreover,the proportion showed high variability at the annual,monthly,and hourly time scales[4].Therefore,raining is a complex and critical factor for road safety planning and *** fact,the traffic environment is a dynamic scene with multiple sources of information,including important targets that are highly relevant to the current driving task as well as irrelevant targets that may distract the driving task[5].

关键词： driving Driver visibility

Power-balancing Instantaneous Optimization Energy Management for a Novel Series-parallel Hybrid Electric Bus

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Chinese Journal of Mechanical Engineering 2012年第6期25卷 1161-1170页

作者： SUN Dongye LIN Xinyou QIN Datong deng tao State Key Laboratory of Mechanical Transmission Chongqing UniversityChongqing 40030China

Energy management（EM） is a core technique of hybrid electric bus（HEB） in order to advance fuel economy performance optimization and is unique for the corresponding configuration. There are existing algorithms of control strategy seldom take battery power management into account with international combustion engine power management. In this paper, a type of power-balancing instantaneous optimization（PBIO） energy management control strategy is proposed for a novel series-parallel hybrid electric bus. According to the characteristic of the novel series-parallel architecture, the switching boundary condition between series and parallel mode as well as the control rules of the power-balancing strategy are developed. The equivalent fuel model of battery is implemented and combined with the fuel of engine to constitute the objective function which is to minimize the fuel consumption at each sampled time and to coordinate the power distribution in real-time between the engine and battery. To validate the proposed strategy effective and reasonable, a forward model is built based on Matlab/Simulink for the simulation and the dSPACE autobox is applied to act as a controller for hardware in-the-loop integrated with bench test. Both the results of simulation and hardware-in-the-loop demonstrate that the proposed strategy not only enable to sustain the battery SOC within its operational range and keep the engine operation point locating the peak efficiency region, but also the fuel economy of series-parallel hybrid electric bus（SPHEB） dramatically advanced up to 30.73% via comparing with the prototype bus and a similar improvement for PBIO strategy relative to rule-based strategy, the reduction of fuel consumption is up to 12.38%. The proposed research ensures the algorithm of PBIO is real-time applicability, improves the efficiency of SPHEB system, as well as suite to complicated configuration perfectly.

关键词： city bus hybrid electric powertrain instantaneous optimization energy management control strategy