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POSS/Polyurethane Hybrids and Nanocomposites: A Review on Preparation, Structure and Performance
( Shuo Diao ),( Li Xin Mao ),( Li Qun Zhang ),( Yi Qing Wang ) 한국고무학회 2015 엘라스토머 및 콤포지트 Vol.50 No.1
Polyhedral oligomeric silsesquioxane (POSS) is an important inorganic-organic hybrid material with a threedimensional structure. Polyurethane (PU) is a widely applied polymer that has versatile properties with the change of two phase structure. When POSS is incorporated into PU by physical or chemical methods, many properties can be greatly improved, such as mechanical properties, thermal stability, biodegradation resistance, and water resistance. This paper reviews the recent progress in preparation, structure, and performance of POSS-modified polyurethane from the viewpoint of physical blending and chemical modification.
A Hierarchical Model for Mobile Ad Hoc Network Performability Assessment
( Shuo Zhang ),( Ning Huang ),( Xiaolei Sun ),( Yue Zhang ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.8
Dynamic topology is one of the main influence factors on network performability. However, it was always ignored by the traditional network performability assessment methods when analyzing large-scale mobile ad hoc networks (MANETs) because of the state explosion problem. In this paper, we address this problem from the perspective of complex network. A two-layer hierarchical modeling approach is proposed for MANETs performability assessment, which can take both the dynamic topology and multi-state nodes into consideration. The lower level is described by Markov reward chains (MRC) to capture the multiple states of the nodes. The upper level is modeled as a small-world network to capture the characteristic path length based on different mobility and propagation models. The hierarchical model can promote the MRC of nodes into a state matrix of the whole network, which can avoid the state explosion in large-scale networks assessment from the perspective of complex network. Through the contrast experiments with OPNET simulation based on specific cases, the method proposed in this paper shows satisfactory performance on accuracy and efficiency.
Shuo Feng,Lehao Chang,Zhaoxia He 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.6
This work developed an efficient model for calculating the mesh stiffness of spur/helical internal gear pairs by combining the finite element method (FEM) and analytical formula. The tooth global deformation is obtained by separation of the deformation of a full finite element model and a partial model, and the local contact deformation is derived by an analytical line contact formula based on Hertz contact theory. The transmission error and mesh stiffness of the gear pair can be acquired after solving the nonlinear contact equilibrium equations. Compared with the conventional FEM, the proposed method has much smaller computational consumption. Furthermore, it also overcomes the disadvantage that the analytical method is difficult to consider different ring gear structures. Then the influences of ring thicknesses and the number of support pins of the ring gear on the mesh stiffness are discussed. The results show that the ring flexibility will change the amplitude-frequency components of the mesh stiffness a lot.
Trends in Three-dimensional Biochips
Shuo Ren,윤혜림,김소연 한국바이오칩학회 2008 BioChip Journal Vol.2 No.3
In the past decade we have witnessed a rapid development in nano biotechnology that has yielded highthroughput and large-scale analysis within a miniaturized and parallel assay system. The biochip is a powerful emerging technology for biomedical, diagnostical, therapeutical, toxicological, and environmental applications. There are diverse sensing mediators used for biochips, including DNA, RNA, and protein, and moreover, even living cells are being studied. Recently, a large variety of biochip materials have been developed. Here, we will give an overview of the trends in three-dimensional biochip materials, particularly focusing on gel materials in biochip applications. We will review some unique methods and remaining challenges.
Shuo Zhang,Zeng-Jun Sun 동중앙아시아경상학회 2014 한몽경상연구 Vol.25 No.2
With the development of Internet technology, electronic commerce shows the vigorous vitality; along with the popularity of a mobile phone and network operator’s technology, electronic commerce began to develop online mode. According to the "2013 annual Chinese e-commerce market data monitoring report", until the December of 2013, trading in e-commerce market scale is 10.2 trillion yuan, grows 29.9% compared to the same period. The online retail market scale is 18851 billion yuan, a year-on-year growth of 42.8%. However, this data only accounted for 8.04% of the total retail sales of social consumer goods, while there are 91.96% lines which are waiting for developing. The biggest advantage of the O2O(online to offline) is it can be introduced the consumers to offline trading. The current O2O e-commerce in China is still in the initial stage of development, there are challenges and opportunities .If the network of electronic commerce and the entity shop retailers can seize the opportunity, and be acknowledged of what the consumers want and need, make full use of large data analysis, he will be successful. Firstly, this paper explains the purpose and significance of the topic, underlining the present internet background and the status of e-commerce in the Internet environment, analyzing the current situation O2O faces, besides, we give some analysis of the O2O mode and summarize the advantages of him. Secondly, through the analysis of 19e O2O, we find the problems in the process of its development. Then, through the example of 19e, we find the problem and deficiency in the development of Chinese O2O. Finally, we summarize it and give some expectations of the O2O’s development in the future.
Performance Comparison Between Hama and Hadoop
Shuo Li,Baomin Xu 보안공학연구지원센터 2015 International Journal of Database Theory and Appli Vol.8 No.3
Massive scientific computations such as matrix, graph and network algorithms are very attractive when they come to modelling real-world data. Apache Hama is a pure BSP (Bulk Synchronous Parallel) distributed computing framework for massive scientific computations. In this paper, our experiments were conducted on a 4-node Hadoop cluster. We implement Monte Carlo algorithm of Pi in Hama and Hadoop under the same software and hardware environment. The experimental results show that Hama can achieve much higher performance than Hadoop in our testbed.
Selection of DNA Aptamers Against Botulinum Neurotoxin E for Development of Fluorescent Aptasensor
Shuo Ren,신혜수,Vinayakumar Gedi,Pooja Dua,이동기,김소연 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.3
Botulinum neurotoxins (BoNTs) produced by Clostridium botulinum are the deadliest toxins known to mankind with a potential of possible bioterrorism agents. Due to the high-potential harm of these toxins, a sensitive and real-time monitoring capable detection systems are required for the early stage detection. In this study, a novel sol–gel-based SELEX was used to isolate single-stranded nucleic acids (ssDNA) aptamers against purified BoNT type E toxoid (BoNTE) using a chemically synthesized random N40 ssDNA library. The bound aptamer sequences after five rounds were analyzed using next-generation sequencing and the resulted high-frequency aptamers were characterized using biolayer interferometry. Among the tested, aptamer BT5.6 showed low nanomolar binding affinity (KD, 53.3 nM) toward BoNTE. As a proof of concept, the aptamer was utilized in a graphene oxide-based detection platform. In summary, we screened and identified a ssDNA aptamer with high affinity toward BoNTE, which, we believe can be used for development of sensitive detection systems.
Shuo Zhang,Zeng-Jun Sun,Lauren H. Lee 동중앙아시아경상학회 2015 한몽경상학회 학술대회 Vol.2015 No.10
In recent years, with the popularity of smart mobile phone, the arrival of the mobile Internet makes e-commerce got further development, but the development of logistics industry is relatively backward, has become the biggest bottleneck in the development of electronic commerce, this paper first analyzes the development of electronic commerce is then proposed to establish and improve the electronic commerce the distribution system of measures, takes various factors into consideration, take effective methods to make the optimization of the distribution system.