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Xinke Ma,Shijin Xu,Jie ZhouQinglu Yang,Yang Yang,Kun Yang,Sim Heng Ong.
We define a Gaussian variational mixture model.
We develop a three-phase registration strategy.
We use anisotropic Gaussian components to weaken the effect of outliers.
We apply the Dirichlet distribution to distinguish the missing points.
The performance of our method outperforms state-of-art methods in this area.
Zhenyu Yu,Kun Yang,Yi Luo,Chunxue Shang,Yu Zhu.
Lake surface water temperature (LSWT) of most lakes in the Yunnan-Guizhou Plateau have risen by 0.29°C in the past 17 years.
Climate warming has the same effect on the LSWT of 11 lakes, but the LSWT closed to urban is liable to be influenced by human activities.
The error of LSWT prediction model is ±0.1°C and LSWT in most lakes will show a warming trend in the next two years.
3.Renewable EnergyVolume 154, July 2020, Pages 1008-1013.
Performance study on a small-scale photovoltaic electrodialysis system for desalination,
https://doi.org/10.1016/j.renene.2020.03.066
Haiyang Xu,XuJi,Liuling WangbJingxin HuangaJingyang HanaYue Wangb
Small-scale photovoltaic electrodialysis system was used for water desalination.
The experimental results were compared with theoretical calculations.
Theoretical calculations predict the experimental results well.
Slower flow rate produces better water desalination and production of fresh water.
ChongZhao Yun,feng Wang Ming Li Wenkui Zhao,Xuejuan Li,Qiongfen Yu,Mengxiao Huang.
Solar Energy Research Institute, Yunnan Normal University, Kunming, 650500, China
An enhanced mass transfer method is employed in CPC adsorption refrigeration.
Various comparison tests with three different operating modes are conducted.
COPpump of the optimal enhanced mass transfer mode is improved by 18.4%.
Desorption pressure of the optimal enhanced mass transfer mode is the lowest.
5.Journal of Hydrology,Volume 583, April 2020, 124576
Research papersImpacts of moisture sources on the temporal and spatial heterogeneity of monsoon precipitation isotopic altitude effects.
YuanmeiJiaoChengjingLiuZhilinLiuYinpingDingQiueXu
https://doi.org/10.1016/j.jhydrol.2020.124576
Moisture sources impact on the temp-spatial heterogeneity of elevation effects on monsoon precipitation 18O.
Temporal heterogeneity depends on the proportion of the moisture sources in the dominant direction.
Spatial heterogeneity depends on different combinations of the moisture sources at high, middle, and low elevations.
Temp-spatial variation and combinations of moisture sources result in three patterns of the elevation effect, i.e. the dominant external moisture type, multiple moisture type, and external–local moisture type.
6.Renewable EnergyVolume 154, July 2020, Pages 201-208
Solar vaporizing desalination by heat concentration,
https://doi.org/10.1016/j.renene.2020.02.105
JingyangHanXuJiHaiyangXuYuanyuanHengCongWangJiaDeng
We propose solar desalination through heat-concentrated vaporization.
Collected solar radiation energy was collected in a high-efficiency steam generator.
The system was validated under various weather conditions.
Experiment and simulation study on convective heat transfer of all-glass evacuated tube solar collector
QiongLiaWenfengGaoaWenxianLinbTaoLiuaYougangZhangaXiangDingaXiaoqiaoHuangaWumingLiuc
https://doi.org/10.1016/j.renene.2020.01.089
The declination angle θm (the angle of the evacuated tube to the manifold plane) have been found.
The efficiency of solar collector is affected by the declination angle θm.
Flow characteristics inside horizontal double-row all-glass evacuated tubes collectors have been studied.
The declination angle θm will contribute to improving the efficiency of solar collectors.
Rong Hu* , Xi Zhang, Kuan-Neng Chi, Tong Yang, and Yun-Hui Yang*
Publication Date:June 4, 2020
9. ACS Applied Materials & Interfaces 2020, 12, 14, 16903-16911.
Yunyan Yu, Nayan Xu, Junhui Zhang, Bangjin Wang, Shengming Xie*, and Liming Yuan*
Publication Date (Web):March 16, 2020DOI: 10.1021/acsami.0c01023
10.Land Degradation & Development Volume 31, Issue 11 ,First published: 06 January 2020Spatial–temporal variations in urbanization in Kunming and their impact on urban lake water quality
Kun Yang,Yi Luo,Kexin Chen,Yang Yang,Chunxue Shang,Zhenyu Yu,Jiaxin Xu,Yisong Zhao
As a radiation centre or hub in Southeast Asia and South Asia and the only Chinese metropolis bordering other ASEAN countries, Kunming has experienced extensive urbanization since the 1980s. This type of human activity has been accompanied by environmental deterioration, especially water quality pollution, in Dianchi Lake, China's sixth largest freshwater lake. This study reveals that the urbanization process has led to land degradation over the past 30 years. First law of geography was introduced to analyze the effects of impervious surface area (ISA) expansion on the lake water environment. The results indicate that the ISA encompassed the lake and radiated outwards. Since the 1990s, approximately 35% of natural surfaces transformed to ISA, and the urban district density exploded from one in 2001 to four in 2017. The urban district area density exploded from 0.06% to 12.05% over the past 17 years. During the past 30 years, the growth rate of ISA exceeded 21 km2 a−1 and even reached 38 km2 a−1 between 2004 and 2017. The spatial pattern of lake water quality was determined by the spatial influences of ISA (G). Then the relationship between water quality indicators and G was analyzed, and the threshold between G and water quality was investigated using an exponential regression analysis method. The results of the correlation analysis indicated that a significant correlation exists between G and lake water quality; although the lake water quality showed a cyclical change, the G impact on the lake water quality was notable. This research proposed an effective method to calculate the spatial influence of the impervious surface on the water quality to reveal the effect of urbanization on the water environment quantitatively and helps us to enhance the understanding of ISA expansion impact on lake environment. Moreover, this research provides decision supports for the environmental protection and management of the lake and empirical evidence regarding urban development impacts on watershed planning.
11.Plant Biotechnology Journal,First published: 07 July 2020
Zhen Wang, Yechun Hong,Yumei Li,Huazhong Shi,Juanjuan Yao,Xue Liu,Fuxing Wang,Sanwen Huang,Guangtao Zhu,Jian‐Kang Zhu.
Effects of carboxymethylation, hydroxypropylation and dual enzyme hydrolysis combined with heating on in vitro hypoglycemic properties of coconut cake dietary fiber (CCDF) were studied. Results showed that all the three modification methods could effectively improve (p < 0.05 ) the glucose‐adsorption ability (GAA), glucose dialysis retardation index (GDRI), α‐glucosidase and α‐amylase inhibition activity of CCDF. The highest GAA (4.45–4.93 mM/g), GDRI (85.09%–86.94% mM/g) and α‐glucosidase inhibition activity (16.39%–19.37%) were found on CCDFs modified by hydroxypropylation and carboxymethylation, attributed to the increased soluble dietary fiber content, viscosity and water retention and swelling capacity. Moreover, CCDF treated by enzymatic hydrolysis combined with heating demonstrated the highest α‐amylase inhibition activity (53.95%), attributed to the high specific surface area, more porous surface structure and formation of fiber‐amylase complex proved by fluorescence spectroscopy. These results suggest that the modified CCDFs could be used as low‐calorie functional ingredients in food or other industries.
本博文中以前已经提过的另外几篇:
http://blog.sciencenet.cn/home.php?mod=space&uid=454141&do=blog&id=1242452
12.Science of The Total Environment,Available online 10 July 2020, 140812
Comparison of long-term energy efficiency and microbial community dynamics of different reactors in response to increased loadings of water hyacinth juice
Highlights:
1. MIC and UASB reactors were examined for their maximum WHJ treatment capacity limits.
2. MIC exhibited a higher energy conversion rate and stronger performance than UASB.
3.The methane production rate and removal OLR showed a linear relationship.
MIC and UASB reactors had similar predominant methanogens: Methanosaeta.
Acetoclastic methanogenesis was the dominant metabolic pathway in WHJ treatment
13. Bioresource Technology 308 (2020) 123300
Novel start-up process for the efficient degradation of high COD wastewater with up-flow anaerobic sludge blanket technology and a modified internal circulation reactor,
A novel start-up process (NSP) was developed and verified in UASB and MIC reactors.
NSP time of MIC reactors (46 days) was less than that of UASB reactors (52 days).
NSP (23,500 mg/L) had higher influent COD than traditional startups (250–6500 mg/L).
The biogas production rate of MIC was three times higher than that of the UASB.
Methane was dominately generated through acetoclastic pathway by Methanosaeta.
14. Journal of Cleaner Production,Volume 257, 1 June 2020, 120441
Evaluation of methane emission flux from a typical biogas fermentation ecosystem in China,
CH4 emission fluxes from a typical hydraulic biogas digester in China were studied.
The diurnal and monthly variations from January to July were characterized.
Different environmental factors had various influences on the CH4 emission fluxes.
Leak of CH4 emission has non-negligible effect on the methane conversion factor.
http://blog.sciencenet.cn/blog-454141-1239108.html
15. Water Research Available online 23 June 2020, 116018 In Press, Journal Pre-proof
Analysis on driving factors of lake surface water temperature for major lakes in Yunnan-Guizhou Plateau
KunYangac1ZhenyuYuab1YiLuoac.https://doi.org/10.1016/j.watres.2020.116018
The heterogeneity of LSWT warming of 11 major plateau lakes were discussed.
6 main factors impact on LSWT were analyzed quantitively.
LSWT changing heterogeneity was revealed from lake type and morphometry perspective.
16.Environmental Pollution Available online 30 May 2020, 114878(小领域1区)
Human activities and the natural environment have induced changes in the PM2.5 concentrations in Yunnan Province, China, over the past 19 years
KunYang,MengfanTeng,YiLuo,XiaoluZhou,MiaoZhang,SunWeizhao,qiulinLi.
https://doi.org/10.1016/j.envpol.2020.114878
17.Sustainable Cities and Society Volume 59, August 2020, 102180
Assessing spatiotemporal air environment degradation and improvement represented by PM2.5 in China using two-phase hybrid model
Kun Yang,Yan Shi,Yi Luo,Ruimei Liu,Weizhao Sun,Mengzhu Sun.
https://doi.org/10.1016/j.scs.2020.102180
18.Journal of Hydrology Volume 582, March 2020, 124488
Research papers Spatial-temporal process simulation and prediction of chlorophyll-a concentration in Dianchi Lake based on wavelet analysis and long-short term memory network
Zhenyu Yu,Kun Yang,Yi Luo,Chunxue Shang.
https://doi.org/10.1016/j.jhydrol.2019.124488
http://blog.sciencenet.cn/blog-454141-1218697.html
19.TrAC Trends in Analytical ChemistryVolume 124March 2020Article 115808
Gas chromatographic separation of enantiomers on novel chiral stationary phases
Sheng-Ming Xie,Xue-Xian Chen,Jun-Hui Zhang,Li-Ming Yuan.
https://doi.org/10.1016/j.trac.2020.115808
Advances on various novel CSPs for GC enantioseparation were reviewed during 2010–2019.
The synthesis strategies to construct chiral porous materials were covered.
The resolution of different types of enantiomers on the novel CSPs was discussed.
The chiral recognition mechanisms between novel CSPs and chiral analytes were explained.
We summarize the advantages and disadvantages of novel CSPs used in GC.
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