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104. Apportionment of Chemical Components and Sources of PM 2.5 in Shihezi City of Xinjiang, China.

Author

Zhong, Yuting, He, Youjiang, Li, Xia, Li, Shuting, Ayitken, Maulen, and Liu, Xinchun

Subjects
MATRIX decomposition, MEMBRANE filters, ATMOSPHERIC sciences, CLUSTER analysis (Statistics), CARBONACEOUS aerosols, POLLUTANTS, AIR filters
Abstract

In order to reveal the pollution characteristics and sources of PM2.5, in this study, we collected PM2.5 filter membrane samples in Shihezi continuously from December 2020 to January 2021, and analyzed 10 kinds of water-soluble inorganic ions (WSIIs) and 24 inorganic elements (IEs), as well as organic carbon (OC) and elemental carbon (EC). The sources and transport paths of PM2.5 were also analyzed via PMF modeling and backward trajectory clustering analysis. The results show that, in winter, Shihezi can have a mean PM2.5 mass concentration as high as 164.69 ± 76.48 μg/m3, and the PM2.5 mass concentration on polluted days is 3.3 times that of clean days. Water-soluble inorganic ions (WSIIs), total carbon (TC), and inorganic elements (IEs) make up the percentage of PM2.5 mass concentration by 64.9%, 9.3%, and 2.6%, respectively. SO42−, NO3−, and NH4+ (SIAs) are the major WSIIs, accounting for 91.0% of the WSII concentration. The heavier the pollution, the more SIAs contribute to PM2.5. The OC mean mass concentration is 14.04 ± 5.32 μg/m3. As the winter pollution becomes worse and worse, the value of OC/PM2.5 decreases constantly while that of SOC/OC follows an opposite trend. During the process of heavy pollution in Shihezi, the secondary transformation of total carbon cannot be ignored. The positive definite matrix factorization (PMF) model result suggests that the main pollution origins of PM2.5 in Shihezi City comprise secondary sources, coal-burning sources, motor vehicle sources, industrial sources, and flying dust sources. The backward trajectory clustering analysis denotes that the winter pollution in Shihezi mainly comes from the local pollutants in Manas and the short-distance transport of pollutants from the Urumqi-Changji Region. [ABSTRACT FROM AUTHOR]

Published
2023
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109. An Efficient Dynamic Programming Algorithm and Implementation for RNA Secondary Structure Prediction

Author

Tan, Guangming, Liu, Xinchun, Sun, Ninghui, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Sunderam, Vaidy S., editor, van Albada, Geert Dick, editor, Sloot, Peter M. A., editor, and Dongarra, Jack J., editor

Published
2005
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113. Family-clinician shared decision making in intensive care units: Cluster randomized trial in China

Author

Liu, Xinchun, primary, Humphris, Gerald, additional, Luo, Aijing, additional, Yang, Mingshi, additional, Yan, Jin, additional, Huang, Shaohua, additional, Xiao, Siyu, additional, Lv, Ailian, additional, Wu, Guobao, additional, Gui, Peigen, additional, Wang, Qingyan, additional, Zhang, Yudong, additional, Yan, Yaxin, additional, Jing, Nie, additional, and Xu, Jie, additional

Published
2022
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121. SmartPAN: In vitro and in vivo proof‐of‐safety assessments for an intra‐operative predictive indicator of postoperative pancreatic fistula

Author

Pausch, Thomas M., primary, Bartel, Marc, additional, Cui, Jiaqu, additional, Aubert, Ophelia, additional, Mitzscherling, Clara, additional, Liu, Xinchun, additional, Gesslein, Bodil, additional, Schuisky, Peter, additional, Kommoss, Felix K. F., additional, Bruckner, Thomas, additional, Golriz, Mohammad, additional, Mehrabi, Arianeb, additional, and Hackert, Thilo, additional

Published
2022
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122. Comparison of surface wind speed and wind speed profiles in the Taklimakan Desert

Author

kang yongde, Lu Hui, Chen Hongna, and Liu Xinchun

Subjects
Surface wind speed, Meteorology, General Neuroscience, Desert (particle physics), Environmental science, General Medicine, General Agricultural and Biological Sciences, Wind speed, General Biochemistry, Genetics and Molecular Biology
Abstract

Near-surface (10 m) wind speed (NWS) plays a crucial role in many areas, including the hydrological cycle, wind energy production, and the dispersion of air pollution. Based on wind speed data from Tazhong and the northern margins of the Taklimakan Desert in Xiaotang in spring, summer, autumn, and winter of 2014 and 2015, statistical methods were applied to determine the characteristics of the diurnal changes in wind speed near the ground and the differences in the wind speed profiles between the two sites. The average wind speed on a sunny day increased slowly with height during the day and rapidly at night. At heights below 4 m the wind speed during the day was higher than at night, whereas at 10 m the wind speed was lower during the day than at night. The semi-empirical theory and Monin–Obukhov (M–O) similarity theory were used to fit the NWS profile in the hinterland of the Tazhong Desert. A logarithmic law was applied to the neutral stratification wind speed profile, and an exponential fitting correlation was used for non-neutral stratification. The more unstable the stratification, the smaller the n. Using M–O similarity theory, the “linear to tens of” law was applied to the near-neutral stratification. According to the measured data, the distribution of φM with stability was obtained. The γm was obtained when the near-surface stratum was stable in the hinterland of Tazhong Desert and the βm was obtained when it was unstable. In summer, γm and βm were 5.84 and 15.1, respectively, while in winter, γm and βm were 1.9 and 27.1, respectively.

Published
2021

136. Hydrothermal Effects of Freeze-Thaw in the Taklimakan Desert

Author

Liu Xinchun, Lu Hui, Chen Hongna, and kang yongde

Subjects
010504 meteorology & atmospheric sciences, soil temperature, Geography, Planning and Development, TJ807-830, 010501 environmental sciences, Management, Monitoring, Policy and Law, TD194-195, 01 natural sciences, Hydrothermal circulation, Renewable energy sources, Soil temperature, GE1-350, Soil moisture content, Water content, 0105 earth and related environmental sciences, Hydrology, hydrothermal condition, Environmental effects of industries and plants, Renewable Energy, Sustainability and the Environment, Desert (particle physics), Front (oceanography), Environmental sciences, Surface heat, Soil water, Environmental science, seasonally frozen soil, soil moisture
Abstract

The Taklimakan Desert, also known as the &ldquo, Sea of Death&rdquo, is the largest desert in China and also the world&rsquo, s second largest remote desert. The road crossing the Taklimakan Desert is the longest desert road in the world and has been the center of the Silk Road since ancient times. Based on field observation data (November 2013 to May 2014) collected from the Tazhong and Xiaotang stations, we studied the interannual and diurnal variations of soil temperature, soil moisture content, and surface heat fluxes during different freezing and thawing periods. The annual and daily changes of soil temperature, soil moisture content, and surface energy fluxes at different freezing and thawing stages were analyzed. We illustrated the coupling relationship between water and heat in freezing-thawing soil in the Taklimakan Desert. We established a coupling model of soil water and heat during freezing and thawing. During the soil freezing period, the soil temperatures at different depths generally trended downward. The temperature difference between the Tazhong station and the Xiaotang station was 4~8.5 &deg, C. The freezing time of soil at 20 cm depth occurred about 11 days after that at 10 cm depth. The effect of ambient temperature on soil temperature gradually weakened with the increase of soil depth. With the occurrence of the soil freezing process, the initial soil moisture contents at 5 cm, 10 cm, 20 cm, and 40 cm depths at the Xiaotang station were 6%, 10%, 29%, and 59%, respectively, and those at the Tazhong station were 5%, 3.6%, 4.4%, and 5.8%, respectively. As the ambient temperature decreased, the freezing front continued to move downward and the liquid soil water content at each depth decreased. The desert highway is closely related to the economic development and prosperity of southern Xinjiang. Therefore, it is important to maintain and inspect the safety and applicability of freeze-thaw zones and avoid casualties from vehicles and personnel.

Published
2021

144. Early Nasojejunal Nutrition Versus Early Oral Feeding in Patients After Pancreaticoduodenectomy: A Randomized Controlled Trial

Author

Liu, Xinchun, primary, Chen, Qiuyang, additional, Fu, Yue, additional, Lu, Zipeng, additional, Chen, Jianmin, additional, Guo, Feng, additional, Li, Qiang, additional, Wu, Junli, additional, Gao, Wentao, additional, Jiang, Kuirong, additional, Dai, Cuncai, additional, Miao, Yi, additional, and Wei, Jishu, additional

Published
2021
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