Yu Liu¹, Ruiting Jiao¹, Liyao Zhao¹, Kai Liu^1,2,*

Energy Engineering, Vol.118, No.2, pp. 363-378, 2021, DOI:10.32604/EE.2021.013472 - 23 December 2020

Abstract The impact of greenization on the marginal utility of the intensity of carbon emissions in China and factors influencing this relationship are explored in this study. China’s level of greenization is evaluated by using an index system developed based on the comprehensive index method. The intensity of carbon emissions is determined by using the standards for the coefficients of conversion of coal equivalent and coefficients of carbon emission. The impact of greenization on the marginal utility of the intensity of carbon emissions is then evaluated by using an elastic formula and factors affecting this relationship… More >

Jingjing Li¹, Xiaorong Wang², Yuan Liu³, Guodong Zhao³, Ting Dai³, Hong Chen³, Haiyan Liao⁴, Haiying Qi^3,#, Jia Li^5,6,7,#,*

Congenital Heart Disease, Vol.16, No.1, pp. 45-52, 2021, DOI:10.32604/CHD.2021.013459 - 23 December 2020

Abstract Background: Previous studies from high altitudes have reported significantly higher prevalence of congenital heart disease (CHD), consisting almost solely of simple CHD. Little is known about the occurrence of complex CHD. Neonates with complex CHD are likely admitted to NICU. We examined the prevalence and spectrum of complex CHD in NICU in order to depict a truer picture of CHD at high altitude. Methods: We reviewed charts of 4,214 neonates admitted to NICU in Qinghai province (average altitude 3,000 m). Echocardiography was performed in 1,943 babies when CHD was suspected based on clinical examinations. Results: CHD was… More >

Xianchao Jiang¹, Jinyang Liu¹, Bo Peng¹, Heng Zhang², Shoujun Li¹, Jun Yan¹, Qiang Wang^1,2,*

Congenital Heart Disease, Vol.16, No.1, pp. 53-64, 2021, DOI:10.32604/CHD.2021.013233 - 23 December 2020

Abstract Background: There is scarce research on large cohorts with tetralogy of Fallot (TOF) from China. The database in Fuwai Hospital was reviewed to ascertain current trends in the management of TOF and to determine the prevalence of various surgical techniques and the optimal early outcome. Methods: This cross-sectional study included 1861 patients who underwent surgery between 2012 and 2017 and were aged 0-18 years old with a primary diagnosis of TOF. A total of 1760 eligible patients were included in the analyses. Results: A total of 1683 patients underwent repair of TOF as a one-stage operation (primary… More >

Claudia Herbst^1,*, Haibo Zhang², Renjie Hu², Jürgen Hörer³, Masamichi Ono³, Vladimiro Vida⁴, Tjark Ebels^5,6, Andrzej Kansy⁷, Jeffrey P. Jacobs⁸, Zdzislaw Tobota⁷, Bohdan Maruszewski⁷

Congenital Heart Disease, Vol.16, No.1, pp. 17-25, 2021, DOI:10.32604/CHD.2021.012982 - 23 December 2020

Abstract Background: The European Congenital Heart Surgeons Association (ECHSA) Congenital Heart Surgery Database (CHSD) was founded in 1999 and is open for worldwide participation. The current dataset includes a large amount of surgical data from both Europe and China. The purpose of this analysis is to compare patterns of practice and outcomes among pediatric congenital heart defect surgeries in Europe and China using the ECHSA-CHSD. Methods: We examined all European (125 centers, 58,261 operations) and Chinese (13 centers, 23,920 operations) data in the ECHSA-CHSD from 2006-2018. Operative mortality, postoperative length of stay, median patient age and weight… More >

Ting Jiang^1,3, Chunmei Yang^1,2,*, Yueqiang Yu³, Bakary S. Doumbia^1,2, Jiuqing Liu^1,*, Yan Ma^1,2

Journal of Renewable Materials, Vol.9, No.1, pp. 119-128, 2021, DOI:10.32604/jrm.2021.011490 - 30 November 2020

Abstract

As a natural and environmentally friendly renewable material, Northeast China ash wood (NCAW) (Fraxinus mandshurica Rupr.) was cut by water-jet assisted CO₂ laser (WACL), the surface quality was evaluated by surface roughness of cut section. The surface roughness was measured by three-dimensional (3D) profilometry. Furthermore, the micromorphology of machined surface was observed by scanning electronic microscopy (SEM). Carbon content changes of machined surface were measured by energy dispersive spectrometer (EDS). A relationship between surface roughness and cutting parameters was established using response surface methodology (RSM). It is concluded that the cutting speed, laser power and water pressure

More >

Salman A. Cheema¹, Tanveer Kifayat², Abdu R. Rahman², Umair Khan³, A. Zaib⁴, Ilyas Khan^5,*, Kottakkaran Sooppy Nisar⁶

CMC-Computers, Materials & Continua, Vol.66, No.2, pp. 1977-1985, 2021, DOI:10.32604/cmc.2020.012096 - 26 November 2020

Abstract The flow of novel coronavirus (COVID-19) has affected almost every aspect of human life around the globe. Being the emerging ground and early sufferer of the virus, Wuhan city-data remains a case of multifold significance. Further, it is of notable importance to explore the impact of unique and unprecedented public health response of Chinese authorities—the extreme lockdown of the city. In this research, we investigate the statistical nature of the viral transmission concerning social distancing, extreme quarantine, and robust lockdown interventions. We observed highly convincing and statistically significant evidences in favor of quarantine and social… More >

Xiubing Gao^1,3, Jiejie Lv², Can Guo¹, Anlong Hu³, Xiaomao Wu³, Zengping Li^4,*

Phyton-International Journal of Experimental Botany, Vol.90, No.1, pp. 179-192, 2021, DOI:10.32604/phyton.2021.012968 - 20 November 2020

Abstract Hevea brasiliensis is one of the important economic trees with a great economic value for natural rubber production. Symbiosis between roots of H. brasiliensis and arbuscular mycorrhizal fungi (AMF) is widely recognized, and can provide a range of benefits for both of them. Hainan Island harbors is one of the largest plantations of H. brasiliensis in China, whereas the information regarding the diversity of AMF in the rhizosphere of H. brasiliensis on this island is scarce. The diversity of AMF species in the rhizosphere of rubber tree plantations in Hainan was investigated in this study. A total of 72… More >

Mengcheng Sun^1,2, Weiya Xu^1,2,*, Huanling Wang^1,3, Qingxiang Meng^1,2, Long Yan^1,2, Wei-Chau Xie⁴

CMC-Computers, Materials & Continua, Vol.66, No.1, pp. 1057-1074, 2021, DOI:10.32604/cmc.2020.012537 - 30 October 2020

Abstract The narrowing deformation of reservoir valley during the initial operation period threatens the long-term safety of the dam, and an accurate prediction of valley deformation (VD) remains a challenging part of risk mitigation. In order to enhance the accuracy of VD prediction, a novel hybrid model combining Ensemble empirical mode decomposition based interval threshold denoising (EEMD-ITD), Differential evolutions—Shuffled frog leaping algorithm (DE-SFLA) and Least squares support vector machine (LSSVM) is proposed. The non-stationary VD series is firstly decomposed into several stationary subseries by EEMD; then, ITD is applied for redundant information denoising on special sub-series,… More >

Xuesong Xu, Hongyan Shao, Shengjie Yang^*, Rongyuan Chen

Intelligent Automation & Soft Computing, Vol.26, No.5, pp. 1063-1072, 2020, DOI:10.32604/iasc.2020.010137

Abstract The aim of this study is to consider the economic, resource, energy and environmental factors in a low-carbon economic efficiency evaluation system and to analyze the factors affecting iron and steel enterprises. A combined data envelopment analysis and Malmquist index model have been used in this paper. We empirically investigate the low-carbon efficiency of the Chinese steel industry using observations of 17 listed enterprises from 2009 to 2013. The results show that the economic efficiency of China’s iron & steel enterprises is generally low. The Malmquist productivity index also shows a decreasing trend. Based More >

Wenbei Bi¹, Zengfeng Yan^1,*, Huan Zhao¹, Lixin Sun², Xudong Wang^3,4, Zhengmo Zhang³

Journal of Renewable Materials, Vol.8, No.12, pp. 1691-1710, 2020, DOI:10.32604/jrm.2020.012808 - 12 November 2020

Abstract Murals in Mogao Grottoes consist of three parts: support layer, earthen plasters and paint layer. The earthen plasters play a key role in the preservation of murals. It is a mixture of Dengban soil, sand, and plant fiber. Two different natural fibers, hemp fiber and cotton fiber, were reinforced to earthen plasters in the same percentage to evaluate the influence on hygrothermal performance. The two types of earthen plasters were studied: one containing hemp fiber in the fine plaster (HFP) and the other containing cotton fiber in the fine plaster (CFP). Specific heat capacity, dry… More >