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| 1 | Alkali-activation reactivity of chemosynthetic Al_2O_3-2SiO_2 powders and their ^(27)Al and ^(29)Si magic-angle spinning nuclear magnetic resonance spectra显示文摘Pure Al_2O_3-2SiO_2 powders were prepared by sol-gel and coprecipitation methods,and their alkaliactivation reactivities were compared.The alkali-activation reactivity of the powder prepared by the sol-gel method was higher than that of the powder prepared by the coprecipitation method.The powders were investigated by ^(27)AI and ^(29)Si magic-angle spinning nuclear magnetic resonance spectroscopy(MAS NMR) to understand the relationship between their structure and alkali-activation reactivity.The ^(27)Al MAS NMR data showed that the five-coordinate AI content of the powder prepared by the sol-gel method was higher than that of the powder prepared by coprecipitation.The higher content of five-coordinate Al corresponded to higher alkali-activation reactivity.The ^(29)Si MAS NMR data showed that for the powder prepared by the sol-gel method,silicon was replaced by aluminum at secondary coordination sites of the central Si atoms during calcination.However,for the powder prepared by single-batch coprecipitation,the main change was from a low degree of polycondensation to a high degree of polycondensation. | Guangjian Zheng Xuemin Cui Dong Huang Jinying Pang Guowei Mo Shujuan Yu Zhangfa Tong | 2015 | Particuology2015，13，5： | 3 |
| 2 | Effect of Soil C,N and P Stoichiometry on Soil Organic C Fractions After Afforestation显示文摘Afforestation is recognized as an important driving force for soil organic C(SOC) dynamics and soil element cycling.To evaluate the relationships between soil C:N:P stoichiometry and SOC fractions,soil C:N:P stoichiometry distributions at 0–200 cm soil depths were analyzed and the contents of SOC fractions were evaluated in 9 typical land-use systems on the Loess Plateau of China.The contents of light fraction organic C,particulate organic C(>53,53–2 000,and>2 000 μm),labile organic C,microbial biomass C,and dissolved organic C decreased with increasing soil depth and were higher in afforested soil than in slope cropland soil.Compared with the slope cropland,different vegetation types influenced soil C:N,C:P,and N:P ratios,especially when C:P and N:P ratios were significantly higher(P<0.05).Moreover,SOC fractions at the 0–10 and 10–40 cm depths were particularly affected by soil C:P ratio,whereas those at the 40–100 and 100–200 cm soil depths were significantly affected(P<0.05) by soil N:P ratio.These results indicate that changes in SOC fractions are largely driven by soil C:P and N:P ratios at different soil depths after afforestation. | ZHAO Fazhu ZHANG Lu SUN Jiao REN Chengjie HAN Xinhui YANG Gaihe PANG Guowei BAI Hongying WANG Jun | 2017 | Pedosphere2017，27，4： | 1 |
| 3 | Quantitative assessment of the influence of terrace and check dam construction on watershed topography显示文摘Terrace and check dam construction has substantially changed land surface morphology,which in turn affects modern surface processes.Digital elevation models(DEMs)provide an effective way to quantitatively analyze surface morphology and processes.However,existing DEMs lack sufficient ability to express artificial terrain.Based on 1:10000 topographic maps of the Zhifanggou watershed,a series of artificial terrain DEMs for the study site were constructed by both field investigation and remote sensing images from 1938 to 2010.Digital terrain analysis was used to quantitatively assess the influence of terrace and check dam construction on the watershed terrain.The results showed that the artificial terrain DEM could capture the spatial distribution patterns of terraces and dam lands and improved the ability of DEM to express terrain.The construction of terraces and check dams clearly changed the surface elevation.The average elevation change of each terrace mainly ranged between–1.5 and 1.5 m,while the annual average deposition height of the dam lands was 9.16 cm.The average slope,slope length,and slope length and steepness factor of the watershed decreased with the effect of the artificial terrain on the surface,and their averages decreased by 0.65°,6.75 m,and 0.83,respectively,from 1938 to 2010.Although the construction of terraces reduced their surface slope to nearly 0°,the slope of terrace embankments rapidly increased,to more than 45°,which may lead to gravitational erosion and potential terrace damage.Terracing reduced the slope length in both the terrace distribution area and downslope of the terraces.Check dam deposition reduced the slope and slope length of the channel.This study contributes to a better understanding of the topographic change rules after terrace and check dam construction,and aids in elucidating the mechanisms of soil erosion process influenced by artificial topography. | Guowei PANG Qinke YANG Chunmei WANG Rui LI Lu ZHANG | 2020 | Frontiers of Earth Science2020，14，2： | 1 |
| 4 | Supervised Analysis of Hepatitis C Virus RNA-Positive Case Reporting in County-Level Hospitals--China,2013−2018显示文摘What is already known on this topic?To understand the status of the diagnosis and reporting of hepatitis C and standardize the reporting of hepatitis C cases in county-level hospitals,we conducted the first supervised analysis of hepatitis C cases in county-level hospitals in China from 2013 to 2018,covering all provincial-level administrative divisions(PLADs)except Tibet.What is added by this report?Through 6 years of supervision,we have obtained key data such as the nucleic acid detection rate and positive rate of hepatitis C virus(HCV)antibody positive cases in our county-level hospitals,the report rate and accuracy of HCV RNA positive cases,and standardized and improved the hepatitis C case reporting in countylevel hospitals to improve data quality and provide data support for the judgment and estimation of hepatitis C in China.What are the implications for public health practice?By strengthening the management and supervision of hepatitis C case reporting,the reporting rate and accuracy of HCV RNA positive cases in county-level hospitals in China had been greatly improved.By combining the number of HCV antibody tests and the number of viral nucleic acid tests in medical institutions around the country,it was possible to effectively assess the current status of hepatitis C in China and to provide a scientific basis for the development of hepatitis C prevention and treatment measures. | Faxin Hei Guowei Ding Shaodong Ye Hailiang Yu Lin Pang Zhongfu Liu | 2020 | China CDC weekly2020，2，31： | 1 |
| 5 | Synthesis of a novel kind of amphiphilic graft copolymer with miktoarm star-shaped side chains 显示文摘 | Luo Xiaolan Wang Guowei Pang Xinchang | 2008 | Macromolecules2008，41，： | 1 |
| 6 | Theestimation of soil organic carbon distribution and storagein a small catchment area of the Loess Plateau显示文摘 | Li Ming Zhang Xingchang Pang Guowei | 2013 | Cate-na2013，，101： | 1 |
| 7 | The dynamic analysis of natural environment change of nuclear test field in Lop Nur region of China显示文摘Using earth satellite observation means, remote sensing information distilled technique and regional research production, we have roundly analyzed and made an integrated evaluation about the Lop Nur nuclear test field in western China. This product reveals the rarely-known nuke explosion effect and response events of geology conditions. It also offers us legible and practical first-hand materials about human extreme effects, important engineering environment and intimidating influence process. By excavating and appraising the materials gradually on the natural environment factors changing in the test field through macroscopic elimination and typical filtration, it can supply basic scientific data for security of national nuclear usage, appraising the nuclear environment synthetically and developing nuclear strategy expediently. | Hu Dongsheng Pang Xilei Zhang Huajing Xu Bing Yu Xuefeng Tian Xinhong An Zhisheng Zhang Guowei | 2008 | Engineering Sciences2008，6，3： | 0 |
| 8 | The paleoclimate environment and recent sea level change on the seashores of Thailand Gulf in Southeast Asia显示文摘This paper analyzed and researched on several significant natural geological sections from the views of stratum-sequence stratigraphy,climate stratigraphy,event stratigraphy and regional stratigraphy by the investigation of Thailand,Malaysia and Singapore. In combination with the coupling relationship between the life-temperature of regional life zone and the evolution of geological environment,this paper exactly made out the geological sediment records of paleoclimate times in different time scales of 3 kaBP,1 kaBP and 0.5 kaBP since the past glacier age of Quaternary period,and it is consecutive and authentic for the material medium and time joint. These studies definitely reflected that the sea level of Thailand Gulf area is in tendency of continually dropping in recent years. They also provided important and new information for the global change analysis. | Hu Dongsheng Li Xiaoyu Pang Xilei Tian Xinhong Zhang Guowei | 2014 | Engineering Sciences2014，12，1： | 0 |
| 9 | Unpaved road erosion after heavy storms in mountain areas of northern China显示文摘More frequent extreme rainfall events associated with global climate change cause greater challenges for soil conservation.Severe erosion occurs on many unpaved roads since these structures create important water flow paths during heavy storms.The present research aimed to investigate the intensity and influencing factors of unpaved road erosion under varied land use and management conditions(sloping cropland,terraced cropland,forest&grass).The erosion occurred in the watersheds contributing runoff water to roads after the greatest rainfall event recorded in the mountain area of northern China caused by Typhon Lekima.The research was conducted in an agricultural-forest-dominated watershed based on field investigation and UAV-based image analysis.A road erosion level classification standard was given according to the occurrence of rills,ephemeral gullies,and gullies.Significant erosion happened on 67% of the unpaved roads;42% of them suffered moderate to severe erosion in which ephemeral gullies or gullies developed.The average erosion amount from these roads was 2280.75 t ha-1 and was significantly influenced by the watershed land use type and management.The dominant factor governing unpaved road erosion associated with terraced cropland was vegetation coverage on roads.Drainage area was the most important factor for road erosion in sloping cropland and forest&grass land,and road gradient was also a critical factor.Terraces,and forest&grass in drainage areas significantly reduced unpaved road erosion by 85%and,47%,respectively,compared to sloping cropland.More integrated measures should be used to prevent unpaved road erosion.The results of this research can be applied to road protection against erosion in heavy storms. | Chunmei Wang Baoyuan Liu Qinke Yang Guowei Pang Yongqing Long Lei Wang Richard M.Cruse Weiqin Dang Xin Liu Enheng Wang | 2022 | International Soil and Water Conservation Research2022，10，1： | 0 |
| 10 | 西安市工业用地时空格局演变特征及空间效应显示文摘As an organic part of urban functions, industrial land is of great significance to the urban healthy and sustainable development. Although consensus has been reached on the evolutionary characteristics and spatial effects of industrial land, the influence mechanism of the evolution of industrial land on urban space still needs further exploration. Therefore, the evolution of industrial land in Xi’an from 2003 to 2019 is analyzed by the land use change matrixes, mixed degrees index, and sprawl index according to the multisource data. The results show that the scale change of industrial land is characterized by an inverted U-shaped curve and development zone-oriented spatial aggregation. Suburbanization, the conversion of agricultural land to industrial land in the suburbs, has intensified urban sprawl, resulting in more serious work-living imbalance and traffic congestion.Deindustrialization, the conversion of industrial land to residential, commercial, and business facilities land in the city center, has promoted urban sprawl, generated a large amount of construction waste, and caused a waste of resources. Based on the complex factors such as urban planning, land finance, and development zones, this study contributes to the research of the improvement of the rationality of urban land layout by revealing the influence mechanism of the evolution of industrial land on urban space. | 赵丹 刘科伟 李建伟 Pang Guowei Meng Yuanxu | 2022 | China City Planning Review2022，31，4： | 0 |
| 11 | Effects of soil rock fragment content on the USLE-K factor estimating and its influencing factors显示文摘Rock fragments are an important component of soil,and their presence has a significant impact on soil erosion and sediment yield.In this paper,the effects of rock fragments in the topsoil profile(RFP)and rock fragments on the soil surface(RFS)on the soil erodibility factor(K)were assessed at a global scale.The spatial pattern of the relationship between stoniness and erodibility(RS-K)and its predominant factors were explored through correlation analysis,pattern analysis,and random forest model analysis.The results were as followings:(1)The existence of RFP increased K by 2.84%.The RFS of the mountain land and desert/Gobi reduced K by 18.7%;therefore,once the RFP and RFS were taken into account in the calculation,K was 6.98%lower.(2)The predominant factors of the effect of RFS and the joint effect of RFP and RFS were elevation and slope gradient.The predominant factors of the effect of RFP were annual average precipitation and annual average temperature.(3)In assessing and mapping soil erosion in large regions,special attention should be given to areas with large rock fragment contents,a relatively high altitude,and the presence of steep slope.If rock fragments were not taken into consideration,the mapping results of soil erosion may be biased.This article made the calculation of K more complete and accurate,thereby improving the accuracy of regional soil erosion estimation.This research was of sig-nificance for the investigation of global hydrological effects and simulation of the global soil carbon budget. | Miaomiao Yang Qinke Yang Keli Zhang Chunmei Wang Guowei Pang Yuru Li | 2023 | International Soil and Water Conservation Research2023，11，2： | 0 |
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