62 research outputs found
Global urban areas from 2000-2012
No full textThe results from "Mapping global urban areas from 2000 to 2012 using time series nighttime light data and MODIS products
Source Code for the extended time series (2000–2018) of global NPP-VIIRS-like nighttime light data
No full textThe source code of the Auto-Encoder network for the extended time series (2000–2018) of global NPP-VIIRS-like nighttime light dat
An extended time-series (2000-2023) of global NPP-VIIRS-like nighttime light data
No full textThe annual NPP-VIIRS-like NTL data of 2023 has been updated.
The annual NPP-VIIRS-like NTL data of 2021 and 2022 have been updated.
The annual NPP-VIIRS-like NTL data of 2019 and 2020 have been updated.
An extended time-series (2000-2018) of global NPP-VIIRS-like nighttime light data from a cross-sensor calibration
Antonina tesquorum Danzig
No full textAntonina tesquorum Danzig Antonina tesquorum Danzig, 1971: 390; Tang, 1992: 25; Wang, 2001: 35; Wu, 2001: 45. Distribution. Henan, Nei Mongol, Ningxia, Shanxi. Host plants. Agropyron cristatum, Cleistogene chinensis, Cleistogene sp., Stipa alieta (Poaceae). Biology. Living at rhizome of its hosts. Material examined: 4 ƤƤ, HENAN: Xixia county, on a species of Poaceae, 17 July 1998, coll. San-an Wu; 3 ƤƤ, NEI MONGOL: Xi Ujimqin Qi, on Stipa alieta, 7 Aug. 1989, coll. Jie Li (EISC); 2 ƤƤ, NEI MONGOL: Uxin Qi, on Agropyron cristatum, 20 Aug. 1986, coll. Jie Li (EISC); 1 Ƥ, NEI MONGOL: Xin Barag Zuoqi, on Cleistogene sp., 9 Aug. 1989, coll. Jie Li (EISC); 5 ƤƤ, NEI MONGOL: Mt. Daqing, on Cleistogene sp., 28 Aug. 1995, coll. San-an Wu (EISC); 9 ƤƤ, NINGXIA: Mt. Helan, on a species of Poaceae, 15 Sept. 1990, Coll. Jian-yi Wang(EISC); 4 ƤƤ, SHANXI: Huiyuan county, on Cleistogene sp., 12 Aug. 1995, coll. San-an Wu(EISC); 3 ƤƤ, SHANXI: Yuanping county, on Agropyron cristatum, 15 Aug. 1995, coll. San-an Wu (EISC).Published as part of Wu, San-An, Lu, Yuan & Nan, Nan, 2012, A review of the genus Antonina Signoret in China (Hemiptera: Coccoidea: Pseudococcidae), with description of a new species, pp. 27-42 in Zootaxa 3514 on page 40, DOI: 10.5281/zenodo.28257
Geochemistry and zircon U-Pb-Hf isotopes of Early Paleozoic arc-related volcanic rocks in Sonid Zuoqi, Inner Mongolia: Implications for the tectonic evolution of the southeastern Central Asian Orogenic Belt
No full textAn Early Paleozoic acid volcanic sequence has been recently detected southeast of Sonid Zuoqi in central Inner Mongolia to constrain the tectonic evolution of the Central Asian Orogenic Belt in this area. First, the volcanic rocks have zircon U-Pb ages of 439-445 Ma. They are characterized by (a) a high silica content, moderate alkali content and low iron content; (b) enrichment in light rare earth elements, depletion of heavy rare earth elements, and negative Eu anomalies; and (c) negative Nb, Ta, and Ti anomalies. Finally, the volcanic samples yield epsilon(Hf)(t) values of -4.7 to +9.2 with T-DM2 ages of 835-1724 Ma. For petrogenesis, they were possibly arc derived, from predominant juvenile materials with subordinate ancient continental crust. Combined with previous studies, the Early Paleozoic Sonid Zuoqi arc magmatism can be divided into three stages: a primitive arc stage represented by 464-490 Ma low-K, calcic granitoids; a normal continental arc stage represented by 439-445 Ma medium-K, calcic to calcic-alkalic plutons and volcanic rocks and a syn-collisional stage represented by 423-424 Ma high-K granites. Furthermore, the timing and tectonic settings of the above magmatic rocks show similarities to those in Xilinhot and other areas of the northern Early to Mid-Paleozoic orogenic belt (NOB), although the rock assemblies and their proportions vary more or less in different areas. Accordingly, the NOB that formed on this arc was probably attributed to the northward subduction of the Paleo-Asian Ocean beginning at similar to 500 Ma, which experienced this type of arc development and was terminated by a soft collision before the Late Devonian. (C) 2016 Elsevier B.V. All rights reserved.National Key Basic Research Program of China [2013CB429801]; National Natural Science Foundation of China [41372225]; China Geological Survey [1212010050503]SCI(E)[email protected]
An improved time-series DMSP-OLS-like data (1992-2023) in China by integrating DMSP-OLS and SNPP-VIIRS
No full textAn improved time-series DMSP-OLS-like data (1992-2019) in China by integrating DMSP-OLS and SNPP-VIIRS
Global urban entities (2000–2024): A novel perspective to delineate urban entities based on consistent nighttime light data
No full textGlobal urban entities (2000–2024): A novel perspective to delineate urban entities based on consistent nighttime light dat
Study on the Law of Surface Cracks While Coal Mining in the Thin Bedrock and Thick Unconsolidated Layer of Yu-Shen-Fu Mining Area
No full textThe law of surface cracks caused by coal mining in ther thin bedrock and thick unconsolidated layer was studied in Yu-Shen-Fu mining area. The crack development in the overlying strata of the coal mining face was detected by drilling survey technology, the whole process of the ground surface crack dynamic evolution was carried out by similar material simulation, and the law of surface cracks evolution was verified by on-site tracking measurement. The study reached the regulation of the overlying strata failure and dynamic evolution of surface cracks caused by coal mining under thin bedrock and thick unconsolidated layer in Yu-Shen-Fu mining area, which can provide theoretical support for the ecological restoration of western mining area
Nanoindentation size effect interpreted by the dislocation nucleation mechanism
Get PDFThe instability criterion of atomic structure is used to investigate the nanoindentation size effect based on the dislocation nucleation mechanism. Both the dislocation nucleation location and the emission direction under indentation can be predicted. The nanoindentation size effect for hardness can be interpreted with a critical condition of the dislocation nucleation through adopting an Atomic Finite Element Method which is associated with the instability criterion. The present results agree well with the analytical solution based on the Rice model. The present results show that the nanoindentation size effect with the flat indenter can be expressed by using the dislocation nucleation concept. From dislocation nucleation point of view, the applied average force (hardness) required for dislocation emission is proportional to the inverse of square root of the width of the nano-indenter (contact zone size)
Investigating the Temporal and Spatial Variability of Total Ozone Column in the Yangtze River Delta Using Satellite Data: 1978–2013
No full textThe objective of this work is to analyze the temporal and spatial variability of the total ozone column (TOC) trends over the Yangtze River Delta, the most populated region in China, during the last 35 years (1978–2013) using remote sensing-derived TOC data. Due to the lack of continuous and well-covered ground-based TOC measurements, little is known about the Yangtze River Delta. TOC data derived from the Total Ozone Mapping Spectrometer (TOMS) for the period 1978–2005 and Ozone Monitoring Instrument (OMI) for the period 2004–2013 were used in this study. The spatial, long-term, seasonal, and short-term variations of TOC in this region were analyzed. For the spatial variability, the latitudinal variability has a large range between 3% and 13%, and also represents an annual cycle with maximum in February and minimum in August. In contrast, the longitudinal variability is not significant and just varies between 2% and 4%. The long-term variability represented a notable decline for the period 1978–2013. The ozone depletion was observed significantly during 1978–1999, with linear trend from (−3.2 ± 0.7) DU/decade to (−10.5 ± 0.9) DU/decade. As for seasonal variability, the trend of TOC shows a distinct seasonal pattern, with maximum in April or May and minimum in October or November. The short-term analysis demonstrates the day-to-day changes as well as the six-week system persistence of the TOC. The results can provide comprehensive descriptions of the TOC variations in the Yangtze River Delta and benefit climate change research in this region
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