大学创业教育支持与导师制度对大学生创业意图影响关系中 :自我效能感的中介效果研究

Wang Zhicheng,Kang Dongwei,Yang Mi lin 부산대학교 중국연구소 2017 Journal of China Studies Vol.20 No.3

In the field of Chinese university students’ entrepreneurial intention, there is little previous studies concerns about the university educational support and entrepreneurial intention. In thi s research, we focus on whether the mentoring and university educational support have the positve effect to the sutdents’ entrepreneurial or not, the statistical population for the study includes the students from 4 universities in China. Among the 263 surveys distributed, 245 surveys were completed and usable. The relationship among the mentoring, university educational support, self-efficacy, and entrepreneurial intention are examined by the SPSS, AMOS, and Bootstrapping. Under the situation of mass entrepreneurship and innovation, the government and university should encourage their mind and good idea to become reality. So, how to develop their entrepreneurial intention is necessary to considered. In this research, the purpose of this study is to empirically investigate the effect of mentoring, university educational support on entrepreneurial intention in Chinese universities. The mediating role of self-efficacy in the relationship between mentoring, university educational support and entrepreneurial intention is analysed. The research results reveal that: firstly, mentoring, as well as university educational support has a positive significant relationship to self-efficacy. Secondly, Self-efficacy also positively relates to entrepreneurial intention. Thirdly, Self-efficacy mediated the relationship between mentoring, university educational support and entrepreneurial intention. Finally, Some practical recommendations to develop the entrepreneurial intention for Chinese university students were suggested. Since today’s youth are the potential entrepreneurs of the future, understanding their self-efficacy and entrepreneurial intention about contextual factors can be a contribution to the development for the literature, and an important step in designing a more effective policy mechanism in universities. Nowadays, reinforce the mentor system and university educational support for the graduates who have entrepreneurial intention is very necessary.

Knowledge Transfer Using User-Generated Data within Real-Time Cloud Services

( Jing Zhang ),( Jianhan Pan ),( Zhicheng Cai ),( Min Li ),( Lin Cui ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.1

When automatic speech recognition (ASR) is provided as a cloud service, it is easy to collect voice and application domain data from users. Harnessing these data will facilitate the provision of more personalized services. In this paper, we demonstrate our transfer learning-based knowledge service that built with the user-generated data collected through our novel system that deliveries personalized ASR service. First, we discuss the motivation, challenges, and prospects of building up such a knowledge-based service-oriented system. Second, we present a Quadruple Transfer Learning (QTL) method that can learn a classification model from a source domain and transfer it to a target domain. Third, we provide an overview architecture of our novel system that collects voice data from mobile users, labels the data via crowdsourcing, utilises these collected user-generated data to train different machine learning models, and delivers the personalised real-time cloud services. Finally, we use the E-Book data collected from our system to train classification models and apply them in the smart TV domain, and the experimental results show that our QTL method is effective in two classification tasks, which confirms that the knowledge transfer provides a value-added service for the upper-layer mobile applications in different domains.

Tensile behavior of stainless steel S30408 at the Arctic low temperature

Jia-Bao Yan,Zhicheng Lin,Peng Xie,Yun-Biao Luo,Yanbo Li 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.40 No.5

This paper investigated tensile behaviours of S30408 at the Arctic low temperatures (T) of -80~20℃. A cooling chamber equipped with liquid nitrogen gas was adopted to rebuild the Arctic low-temperature environment. Standard tension tests were performed on 48 coupons with different thickness at different T values of -80, -60, -30, and 20℃. Test results revealed the ductile failure mode of stainless steel S30408 even at -80℃. The tensile stress-strain (σ-ε) curves of S30408 at ambient temperatures exhibited a long strain hardening plateau. Meanwhile, the low-temperature tensile σ-ε curves of S30408 were different from those at ambient temperatures, which exhibited a second hardening stage with a larger slope than the first hardening. The decreasing T generally increased the elastic modulus, yield and ultimate strength, but reduced the ductility of S30408. Decreasing the T from 20 to -80℃ reduced the ductility of S30408 by about 28%, but improved the elastic modulus, yield and ultimate strength by about 20%, 22%, and 75%, respectively. This paper also adopted the best subset regression analysis method to develop empirical formulae on estimating influences of T on mechanical properties of S30408. Validations of the predictions by these empirical formulae against the test results in the literature proved their accuracies.

Geo-cascading and community-cascading in social networks: Comparative analysis and its implications to edge caching

Zhu, Konglin,Chen, Zhicheng,Zhang, Lin,Zhang, Yuan,Kim, Sang-Wook Elsevier science 2018 Information sciences Vol.436 No.-

<P><B>Abstract</B></P> <P>The proliferation of social networking service (SNS) enables to share information through social links. Due to the characteristics of information and social properties, the diffused information appears various shapes. It may either be shaped as social communities or geographical regions. In order to investigate different information diffusion behaviors, we study over 54,000 pieces of diffused information in Twitter data set. We propose both macro and micro approaches to distinguish different information diffusion behaviors, either by geo-cascading or community-cascading. We then study the characteristics of information cascading behaviors, which come out with a more sophisticated diffusion network pattern in community-cascading diffusion networks. Furthermore, we conduct the experiments to show the impact of different kinds of information diffusion behaviors in the caching behaviors for mobile edge computing. It turns out that the caching scheme combining both social and geographical factors outperforms the conventional caching schemes.</P>

Geological characteristics and main controlling factors of Permian lacustrine tight oil in the eastern part of the Junggar Basin

Junwei Zhao,Huaimin Xu,Cui He,Lin Li,Zhen Yi,Huijing Fang,Zhicheng Lei 한국지질과학협의회 2017 Geosciences Journal Vol.21 No.2

The Junggar basin is rich in oil and gas resources, and recently, unconventional oil and gas reservoirs have become important targets. Significant amounts of oil and gas are located in Permian formations in the Shazhang–Dajing area, however, fewer studies have focused on unconventional oil and gas reservoirs, particularly on the factors controlling the distribution of unconventional reservoirs. In this study, a sequence stratigraphic framework of the study area was developed based on cores, well logs and seismic data. Source rock samples were analyzed, including tests of kerogen, vitrinite reflectance, chloroform bitumen, organic carbon and group composition. The physical properties and pore characteristics of reservoir samples were also analyzed using scanning electron microscope and high resolution electron microscope. The Permian Pingdiquan Formation comprises three thirdorder sequences in which individual sequence can be divided into a low-stand system tract (LST), a transgression system tract (TST), an early high-stand system tract (E-HST), and a late high-stand system tract (L-HST). Several source rock lithologies have high total organic carbon (TOC), and are matured, having excellent hydrocarbon generation potential. Clastic and dolomitic rocks are the main reservoirs, and nanometer-scale pores are the main reservoir space in the tight reservoirs. The distribution of tight oil is controlled by the sequence stratigraphy, palaeogeomorphic units, and sedimentary facies. The fine sediments, which were generally deposited near the initial flooding surface (FFS) and the maximum flooding surface (MFS), are favorable zones for tight oil. The distributions of the hydrocarbon source rocks are controlled by the depositional environment, depending on the palaeogeomorphic units; the deep depression in the Huoshaoshan area and the moderately-deep depression in the Shishugou area are two distinct hydrocarbon generating centers. The distribution of tight oil is clearly controlled by the sedimentary facies; the tight oil is mainly located in the fan delta front and lacustrine depositional environments. The distribution of tight oil in this area is summarized, and favorable areas of tight oil are proposed.

Textual properties of Cu–Mn mixed oxides and application for methyl formate synthesis from syngas

Haijun Zhao,Kegong Fang,Fang Dong,Minggui Lin,Yuhan Sun,Zhicheng Tang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.54 No.-

Cu–Mn mixed oxides with different calcination temperatures were prepared using ammonia complexing method and evaluated for methyl formate (MF) synthesis from syngas with CaO–ZrO2 as co-catalyst. The influence of calcination temperature on the structure and properties of Cu–Mn mixed oxides was investigated by appropriate characterizations. Cu1.5Mn1.5O4 formed during the calcination of Cu–Mn catalyst at 450 C and played a significant role in the MF synthesis. However, it partially decomposed into CuO and MnO2 when the calcination temperature exceeded 550 C. Results showed that the optimum MF selectivity was obtained on Cu–Mn catalyst calcined at 450 C, and the highest CO conversion was obtained on the Cu–Mn sample with calcination temperature of 550 C. The reaction mechanism of MF synthesis from syngas over Cu–Mn mixed oxides and CaO–ZrO2 co-catalyst was thoroughly studied via typical model reactions, and the nucleophilic addition–elimination reaction mechanism was proposed.

Efficiency of gerAa, tupA and ca transformation in Bacillus subtilis for self-healing of concrete cracks

Hanxing He,Gefei Li,Jiantao Zhang,Jinlong Zhang,Mingyue Luo,Wenkai Hu,Yamin Lin,Ziyu Deng,Zhicheng Liu,Weizhao Chen,Xu Deng 한양대학교 세라믹연구소 2019 Journal of Ceramic Processing Research Vol.20 No.5

A genetic approach was proposed to modify the characteristics of Bacillus subtilis strain WB800 (B. subtilis WB800) for selfhealing of concrete cracks. Three genes, namely gerAa which encodes germination receptors activated by L-alanine, tupA which is responsible for the synthesis of teichuronopeptide, and ca which encodes carbonic anhydrase (CA) catalyzing the synthesis of carbonate ion, were separately transformed into WB800. To protect bacterial cells from being squeezed, microspheres were produced with microcrystal cellulose (MCC) before the introduction of bacteria into the specimens. The results showed that the modified B. subtilis expressing GerA achieved 39.9% of germination ratio compared to 17% by the original host cells. With the transformation of tupA, the modified strain demonstrated higher resistance to alkaline environments, tolerating pH as high as 11, while the original strain only tolerated pH 9. The modified strain expressing CA induced more calcium carbonate than the original cells. Energy dispersive spectroscopy (EDS) identified the produced precipitate to be calcite (CaCO3). Moreover, a mathematical model was developed to optimize the influential factors of calcium precipitation process. Finally, based on the above results, an effective self-healing of concrete crack was achieved. This study may provide a promising strategy to improve the efficiency of bacterial self-healing of concrete cracks.