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Dynamic Allocation of Random Access Opportunity for Machine-Type Communication in LTE-Advanced
Peng Li,Yun-jian Jia,Ming-jun Feng,Fei Chen,Pei-hua He,Guo-jun Li 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.2
With the rapid growth of machine-type communications (MTC) devices, the radio access network (RAN) will be overloaded when a large number of MTC devices try to access the radio networks in a short time. In this paper, a combination of a dynamic resource allocation and a random access check mechanism is proposed to solve the overload problems for MTC in LTE-Advanced. An analytical model is presented with the derivation of three metrics, the collision probability, the success probability, and the idle probability to evaluate the method. Simulation and analysis results show the superior performance of the method we proposed to solve the RAN overload problem.
Peng Li,Yun-jian Jia,Fei Chen,Pei-hua He,Hui-fang Fan 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.5
To meet the needs of future mobile communication, an essential approach is adopting new architectures of the mobile communication network and advanced technologies of wireless transmission. We choose GNU Radio and Universal Software Radio Peripheral (USRP) to construct a test platform for mobile communication technologies based on SDR. With the platform, a real communication conforming to LTE-Advanced physical layer specification is implemented by the PSS/SSS of LTE radio frame. The platform provides a tool to design, test and verify mobile communication technologies in real environment.
Contributed Mini Review : Isoforms, structures, and functions of versatile spectraplakin MACF1
( Li Fang Hu ),( Pei Hong Su ),( Run Zhi Li ),( Chong Yin ),( Yan Zhang ),( Peng Shang ),( Tuan Min Yang ),( Ai Rong Qian ) 생화학분자생물학회(구 한국생화학분자생물학회) 2016 BMB Reports Vol.49 No.1
Spectraplakins are crucially important communicators, linking cytoskeletal components to each other and cellular junctions. Microtubule actin crosslinking factor 1 (MACF1), also known as actin crosslinking family 7 (ACF7), is a member of the spectraplakin family. It is expressed in numerous tissues and cells as one extensively studied spectraplakin. MACF1 has several isoforms with unique structures and well-known function to be able to crosslink F-actin and microtubules. MACF1 is one versatile spectraplakin with various functions in cell processes, embryo development, tissue-specific functions, and human diseases. The importance of MACF1 has become more apparent in recent years. Here, we summarize the current knowledge on the presence and function of MACF1 and provide perspectives on future research of MACF1 based on our studies and others. [BMB Reports 2016; 49(1): 37-44]
Junwei Pei,Yongji Jin,Peng Li,Junjun Yang,Hongliang Chi 동북아경상학회 2023 동북아경상연구 Vol.4 No.2
Purpose - The purpose of this paper is to explore the existing problems of the Asian Cruise Service Quality. Based on the relationship between customer participation , customer service personal value and customer loyalty, this paper expounds on how European and American cruise companies can improve customer loyalty by enhancing “customers’ personal value perception to realize the harmony and unity of the enterprises’ profits and social benefits. Design/Methodology/Approach - Based on marketing, the paper studies the low service quality problems of Asian cruise companies. Based on the case analysis and the marketing theories regarding Service-dominant Logic, Customer Value Theory, Customer Loyalty Theory, taking Amercian Princess Cruise company as an example, found the main problems of Asian cruise companies: Low customer loyalty and poor customer experience. Therefore, we make three suggestions. Findings - This paper analyses the promotion path of Carnival Cruise Line, which includes powerful cultural values, surprise service, zero burdens etc. to promote the customer’s personal value perception, therefore obtain the loyalty of the customers. The above empirical research results uncover the relationship among customer participation, personal service value, and customer loyalty, and customers’ participation always helps to strengthen their loyalty (Dubé and Renaghan, 2000; Guo Anxi et al., 2013; Kashyap and Bojanic, 2000; Williams and Soutar, 2009). Research Implications - In the management of this paper, this study has significance in improving the development of Asian tourism, improving user experience and service quality which will also provide a reference for other “scholars’ follow-up research
Liver Function Diagnosis Based on Artificial Bee Colony and K-Means Algorithm
Zhang Lin,Li Peng,Qiao Pei-li 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.1
The traditional K-Means clustering is sensitive to random selection of initial cluster centroids, easily into the local optimal solution. In this paper, an efficient aggregation algorithm which combined with Artificial bee colony and K-Means algorithm is proposed to apply to the diagnosis of liver function. The algorithm reduced the dependence on the initial cluster centroids and the probability to be trapped by local optimal solution, thus assigning data points to their appropriate cluster more efficient. The experimental results show that algorithm proposed in this paper is superior to the K-Means clustering in diagnosis of liver function.
Zou Peihui,Li Peng,Liu Jia,Cao Pei,Luan Qingxian 한국미생물학회 2022 The journal of microbiology Vol.60 No.1
Low electric current can inhibit certain microbial biofilms and enhance the efficacy of antimicrobials against them. This study investigated the electricidal and bioelectric effects of direct current (DC) against Porphyromonas gingivalis biofilms as well as the underlying mechanisms. Here, we firstly showed that DC significantly suppressed biofilm formation of P. gingivalis in time- and intensity-dependent manners, and markedly inhibited preformed P. gingivalis biofilms. Moreover, DC enhanced the killing efficacy of metronidazole (MTZ) and amoxicillin with clavulanate potassium (AMC) against the biofilms. Notably, DC-treated biofilms displayed upregulated intracellular ROS and expression of ROS related genes (sod, feoB, and oxyR) as well as porin gene. Interestingly, DC-induced killing of biofilms was partially reversed by ROS scavenger N-dimethylthiourea (DMTU), and the synergistic effect of DC with MTZ/AMC was weakened by small interfering RNA of porin gene (si-Porin). In conclusion, DC can exert electricidal and bioelectric effects against P. gingivalis biofilms partially via promotion of oxidative stress and antibiotic transport, which offers a promising approach for effective management of periodontitis.
Wang Ju-Wei,Han Pei-Jie,Han Da-Yong,Zhou Sen,Li Kuan,He Peng-Yu,Zhen Pan,Yu Hui-Xin,Liang Zhen-Rong,Wang Xue-Wei,Bai Feng-Yan 한국미생물학회 2021 The journal of microbiology Vol.59 No.8
The amylolytic yeast Saccharomycopsis fibuligera is a predominant species in starters and the early fermentation stage of Chinese liquor (Baijiu). However, the genetic diversity of the species remains largely unknown. Here we sequenced the genomes of 97 S. fibuligera strains from different Chinese Baijiu companies. The genetic diversity and population structure of the strains were analyzed based on 1,133 orthologous genes and the whole genome single nucleotide polymorphisms (SNPs). Four main lineages were recognized. One lineage contains 60 Chinese strains which are exclusively homozygous with relatively small genome sizes (18.55–18.72 Mb) and low sequence diversity. The strains clustered in the other three lineages are heterozygous with larger genomes (21.85–23.72 Mb) and higher sequence diversity. The genomes of the homozygous strains showed nearly 100% coverage with the genome of the reference strain KPH12 and the sub-genome A of the hybrid strain KJJ81 at the above 98% sequence identity level. The genomes of the heterozygous strains showed nearly 80% coverage with both the sub-genome A and the whole genome of KJJ81, suggesting that the Chinese heterozygous strains are also hybrids with nearly 20% genomes from an unidentified source. Eighty-three genes were found to show significant copy number variation between different lineages. However, remarkable lineage specific variations in glucoamylase and α-amylase activities and growth profiles in different carbon sources and under different environmental conditions were not observed, though strains exhibiting relatively high glucoamylase activity were mainly found from the homozygous lineage.
Computer Aided Diagnosis Based on K-means Collaborative Filtering Algorithm
Feng Xue-yuan,Li Peng,Qiao Pei-li 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.4
In computer aided diagnosis (CAD) process, one of the most challenging problems is data sparsity, which leads to the diagnosis results are not reliable. This paper proposes a clustering collaborative filtering based algorithm to solve the problem of data sparsity. In this paper, we use k-means clustering algorithm to cluster the same type of patients, and then adopt collaborative filtering method to fill the missing data values for each cluster, in this way to reduce the complexity of similarity calculation of collaborative filtering. The proposed method makes full use of the information-sharing mechanism of "similar patient population" to predict and fill the missing values. A hepatitis dataset is used for evaluating the performance of the algorithm. Results indicate that the proposed algorithm has better performance for medical record data sparsity problem.
Wen-Liang Wang,Pei-Pei Liu,Ya-Peng Zhang,Jing Li,Hong-Wen Tao,Qian-Qun Gu,Wei-Ming Zhu 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.9
A new hopane type pentacyclic triterpenoid, 2-hydroxydiplopterol (1) has been isolated from the metabolites produced by the halotolerant fungal strain Aspergillus variecolor B-17. The structure of 1 was determined by spectroscopic methods and single crystal X-Ray diffraction analysis. 2-Hydroxydiplopterol (1) exhibited cytotoxicity against K562 cells with an IC50 value of 22 μM.
Bo-Qian Lin,Chao-Peng Huang,Kuo-Yo Tian,Pei-Huan Lee,Wei-Fang Su,Li Xu 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.10 No.1
Bifacial semi-transparent perovskite (PVSK) solar cell is a promising candidate to achieve high photo-electrical conversion efficiency (PCE) in a tandem structure with Si solar cells. The gap between lab-scale cells and large area modules needs to be closed using innovative patterning technology. In this paper we demonstrate that a single nanosecond pulsed laser (wavelength 532 nm, pulse duration 7 ns) can be used to perform all scribing processes, i.e. P1, P2 and P3, to manufacture PVSK solar modules. Compared to picosecond or femtosecond lasers reported in the literature, our approach has the advantages of high stability and low cost, and is thus applicable to large scale manufacturing of PVSK solar modules. Detailed laser processing parameters such as laser power and overlap ratio etc. have been studied to achieve optimal results for each scribing process. A mini module with two cells was fabricated on a 2 × 2 cm2 substrate, showing an active area efficiency of 12.5%, FF of 72.4%, and high GFF of 94%.