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Article ; Online: Urbanization Effects on Surface Wind in the Guangdong-Hong Kong-Macao Greater Bay Area Using a Fan-Sector Method.

Xia, Dong / Nie, Huiwen / Sun, Lei / Wang, Jing / Chow, Kim-Chiu / Chan, Kwing-Lam / Wang, Donghai

International journal of environmental research and public health

2022 Volume 19, Issue 6

Abstract: Surface wind directly affects human life, wind energy utilization, the atmospheric environment, and many other aspects. The Guangdong-Hong Kong-Macau Greater Bay Area (GBA) megalopolis is experiencing an accelerated progress of urbanization, which may ... ...

Abstract	Surface wind directly affects human life, wind energy utilization, the atmospheric environment, and many other aspects. The Guangdong-Hong Kong-Macau Greater Bay Area (GBA) megalopolis is experiencing an accelerated progress of urbanization, which may result in the change in surface roughness and atmospheric characteristics. In this study, urbanization effects on surface wind speed (SWS) in the GBA megalopolis, particularly Zhuhai, is investigated by using long-term automatic meteorological measurements, ERA5 reanalysis, and nighttime light data. Results of the analysis show that the averaged SWS has decreased significantly at a rate of -0.53 m s
MeSH term(s)	Hong Kong ; Humans ; Macau ; Urbanization ; Wind
Language	English
Publishing date	2022-03-08
Publishing country	Switzerland
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2175195-X
ISSN	1660-4601 ; 1661-7827
ISSN (online)	1660-4601
ISSN	1661-7827
DOI	10.3390/ijerph19063194
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Article ; Online: Urbanization Effects on Surface Wind in the Guangdong–Hong Kong–Macao Greater Bay Area Using a Fan-Sector Method

Dong Xia / Huiwen Nie / Lei Sun / Jing Wang / Kim-Chiu Chow / Kwing-Lam Chan / Donghai Wang

International Journal of Environmental Research and Public Health, Vol 19, Iss 3194, p

2022 Volume 3194

Abstract: ... of the increasing global SWS since 2010. In addition, a fan-sector method is established to quantitatively analyze ... averaged over the 3 km upstream fan-sectors. Moreover, their correlation reaches to 0.36 (negative ... when only accounting for the samples of NLI greater than 10. In general, the fan-sector method offers ...

Abstract	Surface wind directly affects human life, wind energy utilization, the atmospheric environment, and many other aspects. The Guangdong–Hong Kong–Macau Greater Bay Area (GBA) megalopolis is experiencing an accelerated progress of urbanization, which may result in the change in surface roughness and atmospheric characteristics. In this study, urbanization effects on surface wind speed (SWS) in the GBA megalopolis, particularly Zhuhai, is investigated by using long-term automatic meteorological measurements, ERA5 reanalysis, and nighttime light data. Results of the analysis show that the averaged SWS has decreased significantly at a rate of −0.53 m s −1 per decade over the past decades. With the help of observation-minus-reanalysis (OMR) method, which excludes the atmospheric circulation effects, we found that the decrease in SWS is mainly contributed by the increase in surface roughness, which may account for as much as 75.5% of the decrease. In other words, it is the rapid development of urbanization, rather than the change in large-scale circulation, that could be mainly responsible for the decrease over the GBA in the context of the increasing global SWS since 2010. In addition, a fan-sector method is established to quantitatively analyze the correspondences between urbanization and roughness changes. It is shown that the decrease in wind speed due to surface roughness change is significantly related to the increase in the nighttime light index (NLI) averaged over the 3 km upstream fan-sectors. Moreover, their correlation reaches to 0.36 (negative) when only accounting for the samples of NLI greater than 10. In general, the fan-sector method offers an additional option for assessing the urbanization effects on SWS.
Keywords	surface wind speed ; urbanization ; GBA megalopolis ; OMR method ; fan-sector method ; Medicine ; R
Subject code	910
Language	English
Publishing date	2022-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Two novel fan-shaped trinuclear Pt(ii) complexes act as G-quadruplex binders and telomerase inhibitors.

Xu, Cui-Xia / Liu, Liu-Yi / Lv, Bei / Zhao, Hao-Yu / Cao, Qian / Zhai, Teng / Mao, Zong-Wan

Dalton transactions (Cambridge, England : 2003)

2020 Volume 49, Issue 27, Page(s) 9322–9329

Abstract: ... for 1 and 2, respectively, exhibited strong telomerase inhibitions. All results suggest that such fan ...

Abstract	Two new trinuclear Pt(ii) complexes {[Pt(dien)]3(tib)}(NO3)6 (1) and {[Pt(dpa)]3(tib)}(NO3)6 (2) (dien: diethylenetriamine, dpa: bis-(2-pyridylmethyl)amine, tib: 1,3,5-tris(1H-imidazol-1-yl)benzene) have been designed, synthesized, characterized and applied to a series of biochemical studies. We found that both of the Pt(ii) complexes exhibited much better selectivity for human telomeric G-quadruplex sequence than promoter G-quadruplexes (c-kit, c-myc, and bcl2) or duplex DNA. Both complexes displayed comparative stability and affinity towards human telomeric G-quadruplex by the studies from surface plasmon resonance, fluorescence resonance energy transfer and polymerase chain reaction stop assays. The circular dichroism indicated that both complexes could induce and stabilize anti-parallel G-quadruplex structures. Molecule docking presented that Pt(ii) complex intercalated into the large groove of human telomeric G-quadruplex (PDB ID: 143D). Furthermore, telomeric repeat amplification protocol assays quantitatively evaluated the inhibition of telomerase activity caused by the Pt(ii) complexes. The obtained IC50 values of 6.41 ± 0.042 μM and 2.67 ± 0.035 μM for 1 and 2, respectively, exhibited strong telomerase inhibitions. All results suggest that such fan-shaped trinuclear Pt(ii) complexes are effective and selective G-quadruplex binders, as well as strong telomerase inhibitors. This study provides insight into the development of human telomeric G-quadruplex targeted anticancer drugs based on the metal complex.
MeSH term(s)	Coordination Complexes/chemistry ; Coordination Complexes/pharmacology ; Enzyme Inhibitors/chemistry ; Enzyme Inhibitors/pharmacology ; G-Quadruplexes/drug effects ; Humans ; Molecular Dynamics Simulation ; Molecular Structure ; Platinum/chemistry ; Platinum/pharmacology ; Telomerase/antagonists & inhibitors ; Telomerase/metabolism
Chemical Substances	Coordination Complexes ; Enzyme Inhibitors ; Platinum (49DFR088MY) ; Telomerase (EC 2.7.7.49)
Language	English
Publishing date	2020-07-08
Publishing country	England
Document type	Journal Article
ZDB-ID	1472887-4
ISSN	1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
ISSN (online)	1477-9234 ; 1364-5447
ISSN	0300-9246 ; 1477-9226
DOI	10.1039/d0dt01767a
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Online: A New Weighting Scheme for Fan-beam and Circle Cone-beam CT Reconstructions

Wang, Wei / Xia, Xiang-Gen / He, Chuanjiang / Ren, Zemin / Lu, Jian / Wang, Tianfu / Lei, Baiying

2021

Abstract: In this paper, we first present an arc based algorithm for fan-beam computed tomography (CT ... reconstruction via applying Katsevich's helical CT formula to 2D fan-beam CT reconstruction. Then, we propose ... fan-beam algorithm to circle cone-beam geometry, we also obtain a new FDK-similar algorithm for circle ...

Abstract	In this paper, we first present an arc based algorithm for fan-beam computed tomography (CT) reconstruction via applying Katsevich's helical CT formula to 2D fan-beam CT reconstruction. Then, we propose a new weighting function to deal with the redundant projection data. By extending the weighted arc based fan-beam algorithm to circle cone-beam geometry, we also obtain a new FDK-similar algorithm for circle cone-beam CT reconstruction. Experiments show that our methods can obtain higher PSNR and SSIM compared to the Parker-weighted conventional fan-beam algorithm and the FDK algorithm for super-short-scan trajectories.
Keywords	Electrical Engineering and Systems Science - Image and Video Processing ; Computer Science - Computer Vision and Pattern Recognition
Publishing date	2021-01-06
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Inactivation of Clinically Frequently Used Antimicrobial Agents By BacT/ALERT FAN Plus and BACTEC Aerobic and Anaerobic Culture Media in Simulated Blood Cultures: First Comparative Evaluation in China Mainland.

Xu, Xiuyu / Wei, Qiang / Wang, Zhu / Yan, Jie / Wang, Huijuan / Xia, Yun

Infection and drug resistance

2021 Volume 14, Page(s) 163–172

Abstract: ... 115 (64.3%) for FA Plus bottles and 64/115 (55.7%) for BACTEC Aerobic Plus bottles. The BacT/ALERT FAN ...

Abstract	Purpose: To evaluate the antimicrobial inactivation capabilities of BacT/ALERT (FA Plus and FN Plus) and BACTEC (Plus Aerobic/F and Lytic/10 Anaerobic/F) media. Patients and methods: The inactivation capabilities of the commercial blood culture media were compared using 21 microorganism-antimicrobial combinations in simulated adult blood cultures. Results: BacT/ALERT culture media demonstrated higher detection rates than the BACTEC culture media. The recovery rates of the aerobic bottles were 74/115 (64.3%) for FA Plus bottles and 64/115 (55.7%) for BACTEC Aerobic Plus bottles. The BacT/ALERT FAN Plus culture media exhibited a shorter time to detection (TTD). The TTD of FA Plus media was 14.7 h, 4.85 h shorter than the BACTEC Aerobic media (19.55 h), while the TTDs of FN Plus media and BACTEC Anaerobic media were 16.8 h and 18.4 h, respectively. Conclusion: BacT/ALERT (FA Plus and FN Plus) media showed relative, but not absolute, advantages, as it had higher detection rates and shorter TTD and thus can be selectively applied to patients with prior use of antimicrobial agents before blood culture samples are taken.
Language	English
Publishing date	2021-01-19
Publishing country	New Zealand
Document type	Journal Article
ZDB-ID	2494856-1
ISSN	1178-6973
ISSN	1178-6973
DOI	10.2147/IDR.S290222
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Article: Soil erodibility and physicochemical properties of alluvial fan of collapsing gullies in South China

Yusong, Deng / Cai Chongfa / Ding Shuwen / Xia Dong

Soil Science Society of China Pedosphere. 2017,

2017

Abstract: ... of alluvial fan farmland, leading to reduction of nutrients, increase of erodibility, and even land ... to CK, the soil in collapsing alluvial fan exhibited an increase in bulk density, but a decrease ... in soil porosity, water holding capacity and fine particulate matter. Soil quality was decreased from fan edge ...

Abstract	In south China, collapsing gully erosion produces a massive deposit of sediment on the plough layer of alluvial fan farmland, leading to reduction of nutrients, increase of erodibility, and even land desertification in the soil. The aim of this study was to investigate the effects of soil physicochemical properties and erodibility on alluvial fans in Hubei, Jiangxi, Fujian and Guangdong of south China. Compared to CK, the soil in collapsing alluvial fan exhibited an increase in bulk density, but a decrease in soil porosity, water holding capacity and fine particulate matter. Soil quality was decreased from fan edge to fan-head. Significant decreases were found in soil pH, the organic matter, cation exchange capacity, total potassium, total nitrogen, total phosphorus, available nitrogen, available phosphorus, and available potassium, resulting in a gradual decrease of the soil nutrients from fan edge to fan-head. Additionally, the soil erodibility was increased most obviously in fan-head, and the soil erodibility K values in various alluvial fans were 96.67%, 119.02%, 123.10%, and 119.69% greater than that of CK. There was a significant correlation between soil erodibility K values with physic-chemical properties, especially sand and organic matter (correlation coefficients: 0.978 and 0.883). The overall results provide some new insights into the relationship between soil physicochemical properties and erodibility on alluvial fans, implying that improving soil structure might be effective approach to increase soil fertility in the alluvial fan farmland of collapsing gullies.
Keywords	agricultural land ; bulk density ; cation exchange capacity ; correlation ; desertification ; erodibility ; gully erosion ; nitrogen ; nitrogen content ; nutrients ; organic matter ; particulates ; pH ; phosphorus ; porosity ; potassium ; ravines ; sand ; soil fertility ; soil nutrients ; soil quality ; soil structure ; water holding capacity ; China
Language	English
Size	p. .
Publishing place	Elsevier Ltd
Document type	Article
Note	Pre-press version
ZDB-ID	1090441-4
ISSN	1002-0160
ISSN	1002-0160
DOI	10.1016/S1002-0160(15)60105-9
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: True Value Estimation of Centrifugal Fan Vibration Data Based on Fusion Method

Fannian Meng / Quanlin Dong / Xintao Xia

Journal of Networks, Vol 9, Iss 3, Pp 558-

2014 Volume 564

Abstract: ... estimated true value. The rule is the range rule. The centrifugal fan vibration data is evaluated using ...

Abstract	Poor information means incomplete and insufficient information, such as unknown probability distributions and trends. In this case, many statistical methods may become ineffective. So a fusion method based on the information poor theory is proposed. The fusion method contains five methods, three concepts, and one rule. The five methods include the rolling mean method, the membership function method, the maximum membership grade method, the moving bootstrap method, and the arithmetic mean method. The three concepts comprise the solution set on the estimated true value, the fusion series, and the terminal estimated true value. The rule is the range rule. The centrifugal fan vibration data is evaluated using the above methods and theory. The experimental investigation shows that the fusion method is effective in evaluating true value with small sample sizes without any prior information of the probability distribution
Keywords	Information Fusion ; Point Estimation ; Data Series ; Small Sample ; Information Poor System ; Electronic computers. Computer science ; QA75.5-76.95 ; Instruments and machines ; QA71-90 ; Mathematics ; QA1-939 ; Science ; Q
Subject code	310
Language	English
Publishing date	2014-03-01T00:00:00Z
Publisher	Academy Publisher
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Effects of land uses on soil physic-chemical properties and erodibility in collapsing-gully alluvial fan of Anxi County, China

Yu-song DENG / Dong XIA / Chong-fa CAI / Shu-wen DING

Journal of Integrative Agriculture, Vol 15, Iss 8, Pp 1863-

2016 Volume 1873

Abstract: ... of alluvial fan farmland and causes increase of desertification, great reduction of nutrients and rapid ... on the soil physic-chemical properties and erodibility of collapsing-gully alluvial fan. Our results show that the physical properties ... of soil in alluvial fan were greatly improved with smaller bulk density, increased soil porosity ...

Abstract	As a special kind of soil erosion that severely deteriorates the qualities of soil in granite regions, collapsing gully is widely distributed in the tropical and subtropical areas of South China. In particular, collapsing-gully erosion produces a large amount of sediment deposited on the plough layer of alluvial fan farmland and causes increase of desertification, great reduction of nutrients and rapid enhancement of erodibility in the soil. This study was designed to evaluate the effects of different land uses on the soil physic-chemical properties and erodibility of collapsing-gully alluvial fan. Our results show that the physical properties of soil in alluvial fan were greatly improved with smaller bulk density, increased soil porosity, strengthened water holding capacity and a higher particulate matter content. The chemical properties of soil were also significantly improved, including pH, cation exchange capacity, and the contents of organic matter, total and available nitrogen, potassium and phosphorus. All the land uses were proved to improve the soil properties, especially in the tea garden, vegetable land and paddy field. The results of correlation analyses among the properties demonstrate that the physical and chemical properties were significantly correlated, indicating that improving the soil physical properties is an effective method to increase the soil nutrient in the farmland of collapsing-gully alluvial fan. In addition, the application of land uses included grass land, eucalyptus forest land, vegetable land, tea garden, sweet potato land, and paddy field reduced the erodibility of the soil compare to bare land. The erodibility K values of soils in grass land, eucalyptus forest land, vegetable land, tea garden, sweet potato land, and paddy field were 14.43, 16.97, 45.45, 33.12, 18.94, and 34.01% lower than those of bare land, respectively. The results of multiple linear regression analysis show that the soil erodibility had a significant correlation with the physic-chemical properties, especially the soil texture and the content of organic matter. In conclusion, our results demonstrate that different land use patterns are effective to improve the quality of the soil in collapsing-gully alluvial fan, including the improvements of the soil structure, nutrients and anti-erosion ability. Our findings provide important implications for the soil improvement in the farmland of collapsing-gully alluvial fan.
Keywords	land use ; soil physic-chemical properties ; soil erodibility ; collapsing gully ; alluvial fan ; Anxi ; Agriculture (General) ; S1-972
Language	English
Publishing date	2016-08-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Effects of land uses on soil physic-chemical properties and erodibility in collapsing-gully alluvial fan of Anxi County, China

DENG, Yu-song / Chong-fa CAI / Dong XIA / Shu-wen DING

Chinese Academy of Agricultural Sciences Journal of integrative agriculture. 2016 Aug., v. 15, no. 8

2016

Abstract	As a special kind of soil erosion that severely deteriorates the qualities of soil in granite regions, collapsing gully is widely distributed in the tropical and subtropical areas of South China. In particular, collapsing-gully erosion produces a large amount of sediment deposited on the plough layer of alluvial fan farmland and causes increase of desertification, great reduction of nutrients and rapid enhancement of erodibility in the soil. This study was designed to evaluate the effects of different land uses on the soil physic-chemical properties and erodibility of collapsing-gully alluvial fan. Our results show that the physical properties of soil in alluvial fan were greatly improved with smaller bulk density, increased soil porosity, strengthened water holding capacity and a higher particulate matter content. The chemical properties of soil were also significantly improved, including pH, cation exchange capacity, and the contents of organic matter, total and available nitrogen, potassium and phosphorus. All the land uses were proved to improve the soil properties, especially in the tea garden, vegetable land and paddy field. The results of correlation analyses among the properties demonstrate that the physical and chemical properties were significantly correlated, indicating that improving the soil physical properties is an effective method to increase the soil nutrient in the farmland of collapsing-gully alluvial fan. In addition, the application of land uses included grass land, eucalyptus forest land, vegetable land, tea garden, sweet potato land, and paddy field reduced the erodibility of the soil compare to bare land. The erodibility K values of soils in grass land, eucalyptus forest land, vegetable land, tea garden, sweet potato land, and paddy field were 14.43, 16.97, 45.45, 33.12, 18.94, and 34.01% lower than those of bare land, respectively. The results of multiple linear regression analysis show that the soil erodibility had a significant correlation with the physic-chemical properties, especially the soil texture and the content of organic matter. In conclusion, our results demonstrate that different land use patterns are effective to improve the quality of the soil in collapsing-gully alluvial fan, including the improvements of the soil structure, nutrients and anti-erosion ability. Our findings provide important implications for the soil improvement in the farmland of collapsing-gully alluvial fan.
Keywords	bulk density ; cation exchange capacity ; desertification ; erodibility ; Eucalyptus ; granite ; grasses ; land use ; nitrogen ; nutrients ; organic matter ; paddies ; particulates ; pH ; phosphorus ; porosity ; potassium ; regression analysis ; sediment deposition ; soil nutrients ; soil structure ; soil texture ; sweet potatoes ; water holding capacity ; China
Language	English
Dates of publication	2016-08
Size	p. 1863-1873.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	2660426-7
ISSN	2095-3119
ISSN	2095-3119
DOI	10.1016/S2095-3119(15)61223-0
Database	NAL-Catalogue (AGRICOLA)

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Article: Optimization of mine ventilation fan speeds according to ventilation on demand and time of use tariff

Chatterjee, Arnab / Lijun Zhang / Xiaohua Xia

Applied energy. 2015 May 15, v. 146

2015

Abstract: ... with the objective of achieving EE. The model is also made to adhere to the fan laws, such that the fan power ... to ventilation fans in underground mines. In particular, ventilation on demand is considered in the study, i.e ...

Abstract	In the current situation of the energy crisis, the mining industry has been identified as a promising area for application of demand side management (DSM) techniques. This paper investigates the potential for energy-cost savings and actual energy savings, by implementation of variable speed drives to ventilation fans in underground mines. In particular, ventilation on demand is considered in the study, i.e., air volume is adjusted according to the demand at varying times. Two DSM strategies, energy efficiency (EE) and load management (LM), are formulated and analysed. By modelling the network with the aid of Kirchhoff’s laws and Tellegen’s theorem, a nonlinear constrained minimization model is developed, with the objective of achieving EE. The model is also made to adhere to the fan laws, such that the fan power at its operating points is found to achieve realistic results. LM is achieved by finding the optimal starting time of the mining schedule, according to the time of use (TOU) tariff. A case study is shown to demonstrate the effects of the optimization model. The study suggests that by combining load shifting and energy efficiency techniques, an annual energy saving of 2540035kWh is possible, leading to an annual cost saving of USD 277035.
Keywords	air ; case studies ; cost effectiveness ; energy conservation ; energy efficiency ; fans (equipment) ; mining ; models ; tariffs
Language	English
Dates of publication	2015-0515
Size	p. 65-73.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2000772-3
ISSN	0306-2619
ISSN	0306-2619
DOI	10.1016/j.apenergy.2015.01.134
Database	NAL-Catalogue (AGRICOLA)

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