1 Dinosaur Eggs in Yiwu City,Zhejiang Province In February 2017,dinosaur egg fossils were discovered in China Town part of Yiwu City,Zhejiang Province.They were confirmed by dinosaur experts from the Zhejiang Museum o...1 Dinosaur Eggs in Yiwu City,Zhejiang Province In February 2017,dinosaur egg fossils were discovered in China Town part of Yiwu City,Zhejiang Province.They were confirmed by dinosaur experts from the Zhejiang Museum of Natural History to be those of Mesozoic herbivorous dinosaurs(Fig.1).Not long before,Yiwu Museum staff had discovered dinosaur eggs close by this place.展开更多
Objective The Yanshan Fold Belt is located within the northern margin of the North China platform and contains welldeveloped and widespread Neoproterozoic and Mesoproterozoic sedimentary units with a total thickness o...Objective The Yanshan Fold Belt is located within the northern margin of the North China platform and contains welldeveloped and widespread Neoproterozoic and Mesoproterozoic sedimentary units with a total thickness of up to 9000 m.Previous studies identified many oil seedlings as well as asphalt and ancient hydrocarbon reservoirs in Northern Hebei depression and western Liaoning depression.This research indicates that the Mesoproterozoic and Neoproterozoic sedimentary units are ideally suited for the formation of significant oil and gas resources.The Niu D1 well was drilled by the China Geological Survey(CGS)in the Niuyingzi area and intercepted oil immersions and oil-and gas-bearing units within a limestone reservoir in the middle Proterozoic Gaoyuzhuang Formation(Fig.1).This study presents new biomarker compound and carbon isotope data that indicate that the oil within this formation was derived from hydrocarbon source rocks of the Hongshuizhuang Formation,part of the Mesoproterozoic Jixian Series,and the reservoir type is overthrust fault fractured anticline hydrocarbon reservoir.The oil reservoir within the Gaoyuzhuang Formation limestone might represent the oldest oil reservoir discovered to date within the Yanliao faulted depression zone.展开更多
1 Introduction Biological markers or biomarkers(Eglinton et al.,1964;Eglinton and Calvin,1967)are molecular fossils,which were derived from once living organisms through the earth history.They occur in sediments,rocks...1 Introduction Biological markers or biomarkers(Eglinton et al.,1964;Eglinton and Calvin,1967)are molecular fossils,which were derived from once living organisms through the earth history.They occur in sediments,rocks,and展开更多
Objective The Huashi Village in Xinglong County of Hebei Province is located in the Yanshan subsidence zone in the central eastern North China Plate,which is 137 km away from Beijing City(Fig.1a).This area has undergo...Objective The Huashi Village in Xinglong County of Hebei Province is located in the Yanshan subsidence zone in the central eastern North China Plate,which is 137 km away from Beijing City(Fig.1a).This area has undergone large-scale magmatic intrusion affected by the tectonic compression of the Pacific Plate in the Mesozoic(known as the Yanshanian movement)to form many alkaline展开更多
Objective Spherical micro-particles are often preserved in Precambrian sedimentary rocks.Finnish and Chinese scholars have previously discovered carbonaceous,siliceous or ferruginous spherules of out-space origin in t...Objective Spherical micro-particles are often preserved in Precambrian sedimentary rocks.Finnish and Chinese scholars have previously discovered carbonaceous,siliceous or ferruginous spherules of out-space origin in the 1.6 Ga and 1.4 Ga sequence,respectively.The presence of spherules can record possible cosmic impact events.Also,cosmic spherules provide important information on the evolution of planets from outer space.This work firstly discovered cosmic spherules in thin layer of carbonaceous siltstone from the Taizi Fm.(1.2-1.3 Ga)of the Shennongjia group in the Shennongjia area。展开更多
Objective The Emeishan large igneous province(ELIP)in SW China is the only one large igneous province in China recognized by international geologists.Previous studies of ELIP over past two decades indicate that the EL...Objective The Emeishan large igneous province(ELIP)in SW China is the only one large igneous province in China recognized by international geologists.Previous studies of ELIP over past two decades indicate that the ELIP age,duration,scale and generation mechanism are still controversial.Among those scientific topics。展开更多
The technique of IP traceback may effectively block DOS (Denial Of Service) and meet the requirement of the computer forensic, but its accuracy depends upon that condition that each node in the Internet must support I...The technique of IP traceback may effectively block DOS (Denial Of Service) and meet the requirement of the computer forensic, but its accuracy depends upon that condition that each node in the Internet must support IP packet marking or detected agents. So far, this requirement is not satisfied. On the basis of traditional traceroute,this paper investigates the efficiency of discovering path methods from aspects of the size and order of detecting packets, and the length of paths.It points out that the size of padding in probed packets has a slight effect on discovering latency, and the latency with the method of bulk sending receiving is much smaller than one with the traditional traceroute. Moreover, the loss rate of packets with the technique of TTL (Time To Live) which increases monotonously is less than that with the technique of TTL which decreases monotonously. Lastly,OS (Operating System) passive fingerprint is used as heuristic to predict the length of the discovered path so as to reduce disturbance in network traffic.展开更多
ChinesearchaeologistShavediscoveredZI^sinZandaCOUnty,NgedOfTibet.Scatteredover3,onsquarekilometers,theyaretheremainsOfananciotkingdom.Grottoes Discovered in Tibet...
The 2019 Annual Symposium on Yunyang Dinosaur Fossil Protection and Research was held in Chongqing on December 16,2019.It was proposed in the symposium that the dinosaurs discovered from the early Middle Jurassic Xint...The 2019 Annual Symposium on Yunyang Dinosaur Fossil Protection and Research was held in Chongqing on December 16,2019.It was proposed in the symposium that the dinosaurs discovered from the early Middle Jurassic Xintiangou Formation in Yunyang,Chongqing could represent a new dinosaur fauna.Previously,only a few dinosaurs have been reported from the Xintiangou Formation.Moreover,the Xintiangou dinosaurs are playing an important role in studying the evolutionary sequence of dinosaurs,and have the potential to fill the gaps during the Early-Middle dinosaur turnover.展开更多
Transcription factors (TFs) are the core sentinels of gene regulation functioning by binding to highly specific DNA sequences to activate or repress the recruitment of RNA polymerase. The ability to identify transcrip...Transcription factors (TFs) are the core sentinels of gene regulation functioning by binding to highly specific DNA sequences to activate or repress the recruitment of RNA polymerase. The ability to identify transcription factor binding sites (TFBSs) is necessary to understand gene regulation and infer regulatory networks. Despite the fact that bioinformatics tools have been developed for years to improve computational identification of TFBSs, the accurate prediction still remains changeling as DNA motifs recognized by TFs are typically short and often lack obvious patterns. In this study we introduced a new attribute-motif distribution pattern (MDP) to assist in TFBS prediction. MDP was developed using a TF distribution pattern curve generated by analyzing 25 yeast TFs and 37 of their experimentally validated binding motifs, followed by calculating a scoring value to quantify the reliability of each motif prediction. Finally, MDP was tested using another set of 7 TFs with known binding sites to in silico validate the approach. The method was further tested in a non-yeast system using the filamentous fungus Magnaporthe oryzae transcription factor MoCRZ1. We demonstrate superior prediction reranking results using MDP over the commonly used program MEME and the other four predictors. The data showed significant improvements in the ranking of validated TFBS and provides a more sensitive statistics based approach for motif discovery.展开更多
文摘1 Dinosaur Eggs in Yiwu City,Zhejiang Province In February 2017,dinosaur egg fossils were discovered in China Town part of Yiwu City,Zhejiang Province.They were confirmed by dinosaur experts from the Zhejiang Museum of Natural History to be those of Mesozoic herbivorous dinosaurs(Fig.1).Not long before,Yiwu Museum staff had discovered dinosaur eggs close by this place.
基金funded by the China Geological Survey Project(Grant No.DD20190098).
文摘Objective The Yanshan Fold Belt is located within the northern margin of the North China platform and contains welldeveloped and widespread Neoproterozoic and Mesoproterozoic sedimentary units with a total thickness of up to 9000 m.Previous studies identified many oil seedlings as well as asphalt and ancient hydrocarbon reservoirs in Northern Hebei depression and western Liaoning depression.This research indicates that the Mesoproterozoic and Neoproterozoic sedimentary units are ideally suited for the formation of significant oil and gas resources.The Niu D1 well was drilled by the China Geological Survey(CGS)in the Niuyingzi area and intercepted oil immersions and oil-and gas-bearing units within a limestone reservoir in the middle Proterozoic Gaoyuzhuang Formation(Fig.1).This study presents new biomarker compound and carbon isotope data that indicate that the oil within this formation was derived from hydrocarbon source rocks of the Hongshuizhuang Formation,part of the Mesoproterozoic Jixian Series,and the reservoir type is overthrust fault fractured anticline hydrocarbon reservoir.The oil reservoir within the Gaoyuzhuang Formation limestone might represent the oldest oil reservoir discovered to date within the Yanliao faulted depression zone.
基金funded by the National Natural Science Foundation of China (Grant No. 41172126)
文摘1 Introduction Biological markers or biomarkers(Eglinton et al.,1964;Eglinton and Calvin,1967)are molecular fossils,which were derived from once living organisms through the earth history.They occur in sediments,rocks,and
基金financially supported by the project of Reconnaissance of Rare Metal Ores Including Rubidium in Huashi Village of Xinglong County, Hebei Province from the Hebei Bureau of Geology and Mineral Resources Exploration (grant No.2015017)
文摘Objective The Huashi Village in Xinglong County of Hebei Province is located in the Yanshan subsidence zone in the central eastern North China Plate,which is 137 km away from Beijing City(Fig.1a).This area has undergone large-scale magmatic intrusion affected by the tectonic compression of the Pacific Plate in the Mesozoic(known as the Yanshanian movement)to form many alkaline
基金co-supported by the National Natural Science Foundation of China(grant No.41472082)the National Key Research and Development Program of China (grant No.2016YFC0601001)+2 种基金the program of China Geological Survey(grant No.12120115068901)the National Stratigraphic committee of ChinaGlobal Geopark of Shennongjia(Shennongjia National Park)
文摘Objective Spherical micro-particles are often preserved in Precambrian sedimentary rocks.Finnish and Chinese scholars have previously discovered carbonaceous,siliceous or ferruginous spherules of out-space origin in the 1.6 Ga and 1.4 Ga sequence,respectively.The presence of spherules can record possible cosmic impact events.Also,cosmic spherules provide important information on the evolution of planets from outer space.This work firstly discovered cosmic spherules in thin layer of carbonaceous siltstone from the Taizi Fm.(1.2-1.3 Ga)of the Shennongjia group in the Shennongjia area。
基金supported by the China Geological Survey project(grant No.1212011120623)
文摘Objective The Emeishan large igneous province(ELIP)in SW China is the only one large igneous province in China recognized by international geologists.Previous studies of ELIP over past two decades indicate that the ELIP age,duration,scale and generation mechanism are still controversial.Among those scientific topics。
文摘The technique of IP traceback may effectively block DOS (Denial Of Service) and meet the requirement of the computer forensic, but its accuracy depends upon that condition that each node in the Internet must support IP packet marking or detected agents. So far, this requirement is not satisfied. On the basis of traditional traceroute,this paper investigates the efficiency of discovering path methods from aspects of the size and order of detecting packets, and the length of paths.It points out that the size of padding in probed packets has a slight effect on discovering latency, and the latency with the method of bulk sending receiving is much smaller than one with the traditional traceroute. Moreover, the loss rate of packets with the technique of TTL (Time To Live) which increases monotonously is less than that with the technique of TTL which decreases monotonously. Lastly,OS (Operating System) passive fingerprint is used as heuristic to predict the length of the discovered path so as to reduce disturbance in network traffic.
文摘ChinesearchaeologistShavediscoveredZI^sinZandaCOUnty,NgedOfTibet.Scatteredover3,onsquarekilometers,theyaretheremainsOfananciotkingdom.Grottoes Discovered in Tibet...
基金granted by the Dinosaur Fossil Protection and Research in Pu’an Township,Yunyang County,Chongqing Program(KJ-2018035).
文摘The 2019 Annual Symposium on Yunyang Dinosaur Fossil Protection and Research was held in Chongqing on December 16,2019.It was proposed in the symposium that the dinosaurs discovered from the early Middle Jurassic Xintiangou Formation in Yunyang,Chongqing could represent a new dinosaur fauna.Previously,only a few dinosaurs have been reported from the Xintiangou Formation.Moreover,the Xintiangou dinosaurs are playing an important role in studying the evolutionary sequence of dinosaurs,and have the potential to fill the gaps during the Early-Middle dinosaur turnover.
文摘Transcription factors (TFs) are the core sentinels of gene regulation functioning by binding to highly specific DNA sequences to activate or repress the recruitment of RNA polymerase. The ability to identify transcription factor binding sites (TFBSs) is necessary to understand gene regulation and infer regulatory networks. Despite the fact that bioinformatics tools have been developed for years to improve computational identification of TFBSs, the accurate prediction still remains changeling as DNA motifs recognized by TFs are typically short and often lack obvious patterns. In this study we introduced a new attribute-motif distribution pattern (MDP) to assist in TFBS prediction. MDP was developed using a TF distribution pattern curve generated by analyzing 25 yeast TFs and 37 of their experimentally validated binding motifs, followed by calculating a scoring value to quantify the reliability of each motif prediction. Finally, MDP was tested using another set of 7 TFs with known binding sites to in silico validate the approach. The method was further tested in a non-yeast system using the filamentous fungus Magnaporthe oryzae transcription factor MoCRZ1. We demonstrate superior prediction reranking results using MDP over the commonly used program MEME and the other four predictors. The data showed significant improvements in the ranking of validated TFBS and provides a more sensitive statistics based approach for motif discovery.
