Preparation of activated carbon spheres and their electrochemical properties as supercapacitor electrode

An Xin,Xing Guannan,Wang Jing,Tian Yanhong,Liu Yunfang,Wan Qiong 한국탄소학회 2021 Carbon Letters Vol.31 No.4

The carbon spheres (CSs) synthesized by an ultrasonic-spray pyrolysis method were activated for supercapacitor electrode. There are plenty of cracks on the surface of the activated carbon spheres (ACSs), which expend with increasing the activation temperature and activator dosage. The specifc capacitance of ACSs increases with the activation temperature and activator dosage and reach to maximal value at certain conditions. Importantly, the ACS sample activated at relatively low activation temperature (600 °C) and 7 of mass ratio of KOH to CSs has the highest specifc capacitance (about 209 F g−1 at 50 mA g−1 of current density) and indicates the excellent cycling stability after 1000 consecutive charge–discharge cycles. Furthermore, the graphene sheets could be found in the samples that were activated at 1000 °C. And the electrode prepared by the sample has the very low series resistance because of the excellent conductivity of the formed graphene sheets.

Extremal problems on the Cartan-Hartogs domains

An Wang,Xin Zhao,Zhiyin Liu 대한수학회 2007 대한수학회지 Vol.44 No.6

Two New Species of Placolecis (Lichenized Ascomycota) from China

( An Cheng Yin ),( Xin Yu Wang ),( Dong Liu ),( Yan Yun Zhang ),( Mei Xia Yang ),( Li Juan Li ),( Li Song Wang ) 한국균학회 2019 Mycobiology Vol.47 No.4

Two new species of the lichen genus Placolecis are discovered in China, namely P. kunmingensis An. C. Yin & Li S. Wang and P. sublaevis An. C. Yin & Li S. Wang. The new combination P. loekoesiana (S.Y. Kondr., Farkas, J.J. Woo & Hur) An. C. Yin is proposed. Placolecis kunmingensis is characterized by having simple, spherical or ellipsoid, hyaline spores, and pear-shaped pycnidia; while P. sublaevis can be distinguished by its thallus forming larger aggregations with slightly flattened lobes at the thallus margin, and urn-shaped pycnidia. Descriptions, a phylogenetic tree and a key are provided for all the known Placolecis species in China.

A Video Traffic Flow Detection System Based on Machine Vision

Xin-Xin Wang,Xiao-Ming Zhao,Yu Shen 한국정보처리학회 2019 Journal of information processing systems Vol.15 No.5

This study proposes a novel video traffic flow detection method based on machine vision technology. The threeframedifference method, which is one kind of a motion evaluation method, is used to establish initialbackground image, and then a statistical scoring strategy is chosen to update background image in real time. Finally, the background difference method is used for detecting the moving objects. Meanwhile, a simple buteffective shadow elimination method is introduced to improve the accuracy of the detection for moving objects. Furthermore, the study also proposes a vehicle matching and tracking strategy by combining characteristics,such as vehicle’s location information, color information and fractal dimension information. Experimentalresults show that this detection method could quickly and effectively detect various traffic flow parameters,laying a solid foundation for enhancing the degree of automation for traffic management.

Taxol Produced from Endophytic Fungi Induces Apoptosis in Human Breast, Cervical and Ovarian Cancer Cells

Wang, Xin,Wang, Chao,Sun, Yu-Ting,Sun, Chuan-Zhen,Zhang, Yue,Wang, Xiao-Hua,Zhao, Kai Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.1

Currently, taxol is mainly extracted from the bark of yews; however, this method can not meet its increasing demand on the market because yews grow very slowly and are a rare and endangered species belonging to first-level conservation plants. Recently, increasing efforts have been made to develop alternative means of taxol production; microbe fermentation would be a very promising method to increase the production scale of taxol. To determine the activities of the taxol extracted from endophytic fungus N. sylviforme HDFS4-26 in inhibiting the growth and causing the apoptosis of cancer cells, on comparison with the taxol extracted from the bark of yew, we used cellular morphology, cell counting kit (CCK-8) assay, staining (HO33258/PI and Giemsa), DNA agarose gel electrophoresis and flow cytometry (FCM) analyses to determine the apoptosis status of breast cancer MCF-7 cells, cervical cancer HeLa cells and ovarian cancer HO8910 cells. Our results showed that the fungal taxol inhibited the growth of MCF-7, HeLa and HO8910 cells in a dose-and time-dependent manner. IC50 values of fungal taxol for HeLa, MCF-7 and HO8910 cells were $0.1-1.0{\mu}g/ml$, $0.001-0.01{\mu}g/ml$ and $0.01-0.1{\mu}g/ml$, respectively. The fungal taxol induced these tumor cells to undergo apoptosis with typical apoptotic characteristics, including morphological changes for chromatin condensation, chromatin crescent formation, nucleus fragmentation, apoptotic body formation and G2/M cell cycle arrest. The fungal taxol at the $0.01-1.0{\mu}g/ml$ had significant effects of inducing apoptosis between 24-48 h, which was the same as that of taxol extracted from yews. This study offers important information and a new resource for the production of an important anticancer drug by endofungus fermentation.

Research on the Value Shift of Ne zha’s Character Image in Different Periods : Take Ne Zha : I am the destiny(2019) and Ne Zha Conquers the Dragon King(1979) as Examples

Xin-Xin Wang(왕신신) 한국엔터테인먼트산업학회 2020 한국엔터테인먼트산업학회논문지 Vol.14 No.7

시대별과 배경에서 나타를 주제로 한 애니메이션 영화로서, 〈나타지마동강세(2019)〉와 〈나타요해1979)〉는 나타의 각기 다른 예술 이미지의 가치와 중요성을 반영하였다. 나타 인물 이미지의 가치 전향 연구는 나타 예술 이미지의 다른 스타일을 보여준다. 본 논문은 영화 속 나타 캐릭터의 예술적 표현에 따라 그 뒤에 나타나는 가치의 변화를 해석하다. 나타의 ‘선’에서‘악’이미지로의 전환은 물론, 아버지의 뜻을 거스르기 어렵다 관념에서 운명이 자신의 손에 있다는 관념으로 옮겨가는 것은 나타 이미지의 다른 가치와 의미를 시대별 배경에서 반영한다. 모든 작품에는 선명한 시대성이 있다. <나타지마동강세(2019)>는 새로운 시기 나타 캐릭터의 영화적 혁신과 내용 깊이가 새롭게 드러난 작품이다. 예술적 표현에는 여러 가지 형식이 있는데, 이러한 차별화가 애니메이션을 주름잡는 매력을 크게 증가시켜 중국 애니메이션 영화가 더 많은 발전 공간과 가치를 갖도록 하다. Ne Zha: I am the destiny(2019)and Ne Zha Conquers the Dragon King(1979)as animated films based on the theme of Ne zha in different eras and contexts, reflecting the value and significance of different artistic images of Ne zha, The study of the value turn in the character image of Ne zha reflects the different styles of artistic images of Ne zha. This thesis attempts to interpret the changing values behind the different artistic expressions of the Ne zha character in different films. The transformation of Ne zha"s image from good to evil, and the shift from the idea of "submit to the will of heaven" to the idea of "taking one"s destiny into one"s own hands" reflect the different values and meanings of Ne zha"s image in different eras. Each film is distinctly contemporary, and Ne Zha: I am the destiny is an innovative and in-depth look at the character of Ne zha in the new era of cinema. There are many forms of artistic expression, and these differences greatly increase the appeal of Ne zha"s artistic image, making Chinese animation films more space and value for development.

Spectrum Sensing for Cognitive Networks Based on Dimensionality Reduction and Random Forest

Xin Wang,Jin-Kuan Wang,Zhi-Gang Liu,Bin Wang,Xi Hu 보안공학연구지원센터(IJSIP) 2014 International Journal of Signal Processing, Image Vol.7 No.3

A Research on ACG Exhibition`s Design and Spread in Mobile Internet Age

Wang xin-xin (사)한국CDE학회 2013 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8

ACG Exhibition is the most important means of media for ACG industry`s centralized brand marketing and image promotion, which is based on the mobile web design to construct the new "moving exhibition" display platform. It is the best integration marketing mode combined with scene display, brand promotion, wireless transmission and social marketing. In order to construct the new "moving exhibition" of ACG Exhibition, this article will systematically analyze ACG Exhibition APP applications` status and design criteria by keywords retrieval, name planning, visual design and system version etc. And give a positioning analysis and innovation design research for ACG Exhibition` mobile applications through product positioning, mode innovation and marketing innovation.

A Video Traffic Flow Detection System Based on Machine Vision

Wang, Xin-Xin,Zhao, Xiao-Ming,Shen, Yu Korea Information Processing Society 2019 Journal of information processing systems Vol.15 No.5

This study proposes a novel video traffic flow detection method based on machine vision technology. The three-frame difference method, which is one kind of a motion evaluation method, is used to establish initial background image, and then a statistical scoring strategy is chosen to update background image in real time. Finally, the background difference method is used for detecting the moving objects. Meanwhile, a simple but effective shadow elimination method is introduced to improve the accuracy of the detection for moving objects. Furthermore, the study also proposes a vehicle matching and tracking strategy by combining characteristics, such as vehicle's location information, color information and fractal dimension information. Experimental results show that this detection method could quickly and effectively detect various traffic flow parameters, laying a solid foundation for enhancing the degree of automation for traffic management.

Prevalence and Genotype Distribution of Human Papillomavirus among Women from Henan, China

Wang, Xiao-Chuan,Sun, Liang-Qi,Ma, Li,Li, Hua-Xin,Wang, Xiu-Li,Wang, Xin,Yun, Tian,Meng, Nian-Long,Lv, Da-Le Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.17

Human papillomavirus (HPV) infection has been implicated as a causative of cervical cancer. In the present study, a total of 578 samples from females attending the gynecological outpatient clinic in Henan province, China, were collected and the HPV genotypes were detected by gene chip and flow-through hybridization. Overall, 44.5% (257/578) females were found to be HPV DNA positive, and the high risk HPV (HR-HPV) rate was 35.1% (203/578). The first peak of HR-HPV infection appeared in the >60 year-old group (55.0%), and the second was within the 51-55 year-old group (50.0%) (${\chi}^2$=19.497, p<0.05). HPV 16 was the most prevalent genotype (9.2%), followed by HPV 52 (7.8%), HPV 6 (6.9%), HPV 11 (5.9%) and HPV 42 (5.0%). The single type HPV infection was 30.4%, with the five majority prevalent genotype HPV 16 (16.5%), HPV 52 (14.3%), HPV 6 (12.6%), HPV 42 (8.6%), HPV 31 (5.1%). The multiple-type HPV infections were 14.0%, and HPV 16 was the most prevalent type (29.6%), followed by HPV 52 (24.7%), HPV 6 (22.2%), HPV 11 (22.2%), HPV 42 (17.3%) and HPV 39 (17.3%).