Architecture of LTE-WIFI Integration for SDN Towards IP Systems

Chen Yange,Zhang Zhili,Du Genyuan,Chen Shangbo 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.12

Against the background of a surge in software-defined network (SDN)as well as urgent demands for LTE-WIFI internetworking and IPv6 network integration, the paper integrates LTE mobile telecommunication technology, wireless local area network and 5G (the fifth generation mobile communication system)into one, in an attempt to complete routing, distribution, and transmission of different radio frequency signals (i.e.LTE, WIFI) on the SDN basis. As a result, large-area coverage of LTE-WIFI network signals is realized in a way that meeting the demands of reliability, safety,flexibility and extendibility for mobile internet. What is more, different complementary wireless telecommunication systems are closed combined with each other. Through the use of SDN integration technology, the paper designs network integration architecture of IP-LTE mobile internet and WIFI, and also studies on the application of SDN-based IP optical integration network, which has broad prospects.

A Water-saving Irrigation Decision-making Model for Greenhouse Tomatoes based on Genetic Optimization T-S Fuzzy Neural Network

( Zhili Chen ),( Chunjiang Zhao ),( Huarui Wu ),( Yisheng Miao ) 한국인터넷정보학회 2019 KSII Transactions on Internet and Information Syst Vol.13 No.6

In order to improve the utilization of irrigation water resources of greenhouse tomatoes, a water-saving irrigation decision-making model based on genetic optimization T-S fuzzy neural network is proposed in this paper. The main work are as follows: Firstly, the traditional genetic algorithm is optimized by introducing the constraint operator and update operator of the Krill herd (KH) algorithm. Secondly, the weights and thresholds of T-S fuzzy neural network are optimized by using the improved genetic algorithm. Finally, on the basis of the real data set, the genetic optimization T-S fuzzy neural network is used to simulate and predict the irrigation volume for greenhouse tomatoes. The performance of the genetic algorithm improved T-S fuzzy neural network (GA-TSFNN), the traditional T-S fuzzy neural network algorithm (TSFNN), BP neural network algorithm(BPNN) and the genetic algorithm improved BP neural network algorithm (GA-BPNN) is compared by simulation. The simulation experiment results show that compared with the TSFNN, BPNN and the GA-BPNN, the error of the GA-TSFNN between the predicted value and the actual value of the irrigation volume is smaller, and the proposed method has a better prediction effect. This paper provides new ideas for the water-saving irrigation decision in greenhouse tomatoes.

Reducing Computations in Chang et al.’s on-line Electronic Check

Zhili Zhou,Ching-Nung Yang,Chih-Fei Chen 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.10

With the recent popularity of shopping online, on-line electronic check (OLEC) as low-risk and low-cost way to perform payment has become an important component in e-commerce. Recently, Chang et al. propose an OLEC by using hash chain to represent the maximum face value and the face amount on an e-check. However, these values of Chang et al.’s OLEC cannot be arbitrary, and it is infeasible to compute hash operations for too large values. In this paper, we adopt a decimal based hash chain to design an enhanced OLEC (EOLEC). Our EOLEC significantly reduces the hash operations in Chang et al.’s OLEC to provide a much faster transaction, and meanwhile retains its original characteristics. Also, our EOLEC with arbitrary maximum face value and face amount on a check is more like the traditional paper check.

A Novel EYA1 Mutation Causing Alternative RNA Splicing in a Chinese Family With Branchio-Oto Syndrome: Implications for Molecular Diagnosis and Clinical Application

Anhai Chen,Chufeng He,Yong Feng,Jie Ling,Xin Peng,Xianlin Liu,Shuang Mao,Yongjia Chen,Mengyao Qin,Shuai Zhang,Yijiang Bai,Jian Song,Zhili Feng,Lu Ma,Dinghua He,Lingyun Mei1 대한이비인후과학회 2023 Clinical and Experimental Otorhinolaryngology Vol.16 No.4

Objectives. Branchio-oto syndrome (BOS) primarily manifests as hearing loss, preauricular pits, and branchial defects. EYA1is the most common pathogenic gene, and splicing mutations account for a substantial proportion of cases. However,few studies have addressed the structural changes in the protein caused by splicing mutations and potential pathogenicfactors, and several studies have shown that middle-ear surgery has limited effectiveness in improving hearing in thesepatients. BOS has also been relatively infrequently reported in the Chinese population. This study explored the ge-netic etiology in the family of a proband with BOS and provided clinical treatment to improve the patient’s hearing. Methods. We collected detailed clinical features and peripheral blood samples from the patients and unaffected individualswithin the family. Pathogenic mutations were identified by whole-exome sequencing and cosegregation analysis andclassified according to the American College of Medical Genetics and Genomics guidelines. Alternative splicing wasverified through a minigene assay. The predicted three-dimensional protein structure and biochemical experimentswere used to investigate the pathogenicity of the mutation. The proband underwent middle-ear surgery and was fol-lowed up at 1 month and 6 months postoperatively to monitor auditory improvement. Results. A novel heterozygous EYA1 splicing variant (c.1050+4 A >C) was identified and classified as pathogenic (PVS1(RNA),PM2, PP1). Skipping of exon 11 of the EYA1 pre-mRNA was confirmed using a minigene assay. This mutation mayimpair EYA1-SIX1 interactions, as shown by an immunoprecipitation assay. The EYA1-Mut protein exhibited cellularmislocalization and decreased protein expression in cytological experiments. Middle-ear surgery significantly improvedhearing loss caused by bone-conduction abnormalities in the proband. Conclusion. We reported a novel splicing variant of EYA1 in a Chinese family with BOS and revealed the potential molec-ular pathogenic mechanism. The significant hearing improvement observed in the proband after middle-ear surgeryprovides a reference for auditory rehabilitation in similar patients.

FABRICATING WELL-DISPERSED NANOSIZED GOLD CATALYST ON TITANATE NANOWIRES SURFACE FOR 4-NITROPHENOL REDUCTION

GUANGLIANG CHEN,FEI XUE,ZHILI CHEN,XIAOLEI SI,JUN HUANG,XU ZHENG,SYLVAIN MASSEY 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.3

In this paper, homogenous gold nanoparticles (AuNPs) with a high density and a narrow sizedistribution were successfully fabricated on titanate nanowires (TNWs) sca®olds in the absenceof organic capping agents. An ameliorated low-temperature hydrothermal method was used toprepare the TNWs sca®olds like bird's nest on the Ti substrate, and the nanowires diameter wasabout 30 – 80nm. Then, AuNPs were synthesized on the TNWs sca®olds with a deposition –precipitation urea (DPU) method. The TEM and XRD measurements indicated that well-crys-tallized face-centered cubic (fcc) AuNPs were homogeneously dispersed on TNWs, and AuNPswith average sizes of 2.7 nm and 4 nm were obtained, respectively for the theoretical gold loading5 wt.% and 8 wt.%. Inspiringly, the 8%-AuNPs/TNWs catalyst could reduce 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) within 210 s, and exhibited better catalytic reduction performancethan that of 5%-AuNPs/TNWs.

Study and Design of SDN Intelligent Campus Architecture Based on IPv6

Chen Yange,Yang Xiaopin,Zhang Zhili,Zhao Liang 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.12

Against the backdrop of Internet of Things on campus, this paper makes Internet of things cover the entire campus through wired and wireless accesses. As a result, campus sees the fulfillment of information transfer via computers, mobile phones, devices and other articles, which is the embodiment of intelligence. Besides, OPNET is used for modeling and simulation of wireless network structure in SDN intelligent campus, with a view to analyzing the feasibility and advantages of various campus network topologies. Then, a reasonable scheme is presented responding to different types of topologies, which is conducive to better building an intelligent campus.

Multivalency-Driven Formation of Te-Based Monolayer Materials: A Combined First-Principles and Experimental study

Zhu, Zhili,Cai, Xiaolin,Yi, Seho,Chen, Jinglei,Dai, Yawei,Niu, Chunyao,Guo, Zhengxiao,Xie, Maohai,Liu, Feng,Cho, Jun-Hyung,Jia, Yu,Zhang, Zhenyu American Physical Society 2017 Physical Review Letters Vol.119 No.10

<P>Contemporary science is witnessing a rapid expansion of the two-dimensional (2D) materials family, each member possessing intriguing emergent properties of fundamental and practical importance. Using the particle-swarm optimization method in combination with first-principles density functional theory calculations, here we predict a new category of 2D monolayers named tellurene, composed of the metalloid element Te, with stable 1T-MoS2-like (alpha-Te), and metastable tetragonal (beta-Te) and 2H-MoS2-like (gamma-Te) structures. The underlying formation mechanism is inherently rooted in the multivalent nature of Te, with the central-layer Te behaving more metal-like (e.g., Mo), and the two outer layers more semiconductorlike (e.g., S). We also show that the alpha-Te phase can be spontaneously obtained from the magic thicknesses divisible by three layers truncated along the [ 001] direction of the trigonal structure of bulk Te, and both the alpha- and alpha-Te phases possess electron and hole mobilities much higher than MoS2. Furthermore, we present preliminary but convincing experimental evidence for the layering behavior of Te on HOPG substrates, and predict the importance of multivalency in the layering behavior of Se. These findings effectively extend the realm of 2D materials to group-VI elements.</P>

리그닌 쉬프 염기-구리 복합체의 합성 및 메틸렌 블루와 4-니트로페놀 제거를 위한 촉매 응용

진건송 ( Jiansong Chen ),허지원 ( Ji Won Heo ),김지우 ( Ji Woo Kim ),장즈리 ( Zhili Zhang ),김민수 ( Min Soo Kim ),김용식 ( Yong Sik Kim ) 한국목재공학회 2022 한국목재공학회 학술발표논문집 Vol.2022 No.2

Recently, the fabrication of biopolymer-based catalysts has been considered due to the advantages of biodegradability, highly efficiency, low cost and so on. In this work, novel catalyst lignin Schiff base-copper complex (L-SB-Cu) was synthesized and it was used for methylene blue (MB) and 4-nitrophenol (4-NP) removal in aqueous solutions. The catalyst was synthesized successfully and it was characterized by elemental analysis, Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), gel permeation chromatography (GPC), proton nuclear magnetic resonance (¹H NMR), carbon-13 nuclear magnetic resonance (¹³C NMR), and elemental mapping. The L-SB-Cu catalyst was used in the catalytic reduction of organic pollutants such as MB and 4-NP with sodium borohydride (NaBH₄) as a reducing agent, and the catalyst ability was evaluated by UV-visible spectroscopy. The catalyst L-SB-Cu showed highly catalyst ability towards MB and 4-NP, and it also showed good recyclability and reusability. This work showed a new strategy of utilizing bio-based catalyst as a highly efficiency catalyst to degrade organic pollutants.

Structure and Performance Characteristics of Saturated Iron-core Superconducting Fault Current Limiter

Niu, Xiaoye,Chen, Zhili,Wang, Haizhen,Chen, Zhifu,Zhang, Lifeng,Niu, Guojun,Hong, Hui,Xin, Ying 대한전기학회 2014 The Journal of International Council on Electrical Vol.4 No.2

Superconducting fault current limiter (SFCL) is a kind of short-circuit current limiting device for power grid. It's a new application of superconducting technology on power equipments. Saturated Iron-core Superconducting fault current limiter (SISFCL) is one of many types of SFCL. It takes the advantage that no quenching occurs in superconducting wires during fault current limiting process. The immediately reacting and fast recovering are also its main characteristics. The structure and function of SISFCL is similar to that of traditional transformer and current limiting reactor respectively. Based on mature technologies on design and manufacture of iron core and windings of transformers, SISFCL could be made at the same voltage level as traditional transformers. But there are also significant differences between them. SISFCL will offer an effective solution to limit short-circuit current in future HV or EHV power systems because of its peculiar structures and properties. In this paper, we introduce the structure and characteristics of the SISFCL developed by Innopower. It may help readers to understand SISFCL and its enormous application value for power grids.

HIGHLY CATALYTIC Ag/Co3O4 NANOCATALYSTS FABRICATED FOR RhB DYE DEGRADATION THROUGH A SIMPLE SILVER-MIRROR REACTION UNDER VISIBLE LIGHT

XIAOLEI SI,GUANGLIANG CHEN,Zhili Chen,JUN HUANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.8

In this paper, a highly catalytic and nanosized Ag/Co3O4 composite for rhodamine B (RhB) degradation was fabricated by using the co-precipitation method at room temperature. The Ag/Co3O4 structure and catalytic properties were characterized through scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) gassorption measurements, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-Vis spectroscopy. The results showed that the Co3O4 nanosheets prepared by hydrothermal synthesis mainly exposed (2 2 0) and (1 1 1) facets, which played an important role in determining its catalytic oxidation performance. The Co3O4 nanosheets doped with Ag nanoparticles by a simple silver-mirror reaction exhibited a stable and well-dispersed property in dye solution. Compared to the Ag and Co3O4 nanostructure, the Ag nanoparticles with bigger diameter (10 nm) on Co3O4 surface also readily produced surface-active oxygen species and exhibited a higher catalytic activity for the degradation of RhB solution (5 mg·L-1) under the visible light. The kinetic constant K of Ag/Co3O4 catalyst for RhB degradation reaction was evaluated to0.02724 min-1, which is relatively higher than those reported in the literatures.