Classifying imbalanced Internet traffic based PCDD

Ruoyu Wang,Ling Zhang,Zhen Liu 한국산학기술학회 2013 SmartCR Vol.3 No.2

Internet traffic classification is important for network traffic engineering and management. Previous studies have shown that machine learning-based traffic classification methods can obtain high classification accuracy in a static classification context. On the other hand, Internet traffic flows are dynamic, and the classification model needs to be updated at certain intervals. This study first examined the concept drift situation in multi class Internet traffic classification. The classifier obtains high classification accuracy for the majority class over a long period, but looses the classification accuracy for the minority class within a short time. This suggests that concept drift occurs easily in the minority class. To adapt the dynamic classification context, this paper proposes a classification framework based on the concept drift detection method. The experiment results on real traffic datasets showed that the proposed approach can promptly detect concept drift for each class and improve the recall of the minority class while maintaining high overall accuracy.

Drug Reaction with Eosinophilia and Systemic Symptoms Associated with Reactivation of Epstein-Barr Virus and/or Cytomegalovirus Leading to Hemophagocytic Syndrome in One of Two Patients

( Jianhua Liang ),( Hui Qu ),( Xiaowen Wang ),( Aiping Wang ),( Lingling Liu ),( Ping Tu ),( Ruoyu Li ),( Mingyue Wang ) 대한피부과학회 2018 Annals of Dermatology Vol.30 No.1

Drug reaction with eosinophilia and systemic symptoms (DRESS) is a hypersensitivity reaction characterized by maculopapular rash, exfoliative dermatitis, lymphadenopathy, fever, eosinophilia, and involvement of internal organs. Evidence for reactivation of herpes family viruses has been observed in some DRESS patients, and activated CD8+ T lymphocytes are largely directed against Epstein-Barr virus. Here, we report two cases complicated with this infection. Both patients received antibiotics and non-steroidal anti-inflammatory drugs. These patients manifested clinically with high fever, facial edema, diffuse pruritic erythroderma and maculopapules over the entire body, purpuric rashes in both lower limbs and lymphadenopathy of cervical and inguinal nodes. Laboratory tests revealed abnormal liver function, blood eosinophils, and ferritin levels. The patients recovered completely; however, the female patient developed hemophagocytic syndrome on the 15th day of illness. She developed new itchy rash, and laboratory tests rapidly worsened with fibrinogen levels dramatically reduced to 0.61 g/L. Bone marrow aspiration revealed an increased number of macrophages with hemophagocytosis and a reversed CD4/CD8 ratio of 0.45. These cases suggest that human herpes virus and coagulation function evaluations are necessary in DRESS patients. (Ann Dermatol 30(1) 71∼74, 2018)

Physiological and gene expressional responses of the harmful dinoflagellate Cochlodinium polykrikoides exposed to the biocide agents copper sulfate and oxidizing chlorine

Ruoyu Guo,Wang-Hui,Won-Bae Yu,Jang-Seu Ki 한국수산과학회 양식분과 2015 한국수산과학회 양식분과 학술대회 Vol.2015 No.10

Physiological and gene expressional responses of the harmful dinoflagellate Cochlodinium polykrikoides exposed to the biocide agents copper sulfate and oxidizing chlorine

Ruoyu Guo,Wang-Hui,Won-Bae Yu,Jang-Seu Ki 한국수산해양기술학회(구 한국어업기술학회) 2015 한국수산해양기술학회 학술발표대회 Vol.2015 No.10

6.0 K microarray reveals differential transcriptomic responses in the dinoflagellate <i>Prorocentrum minimum</i> exposed to polychlorinated biphenyl (PCB)

Wang, Hui,Guo, Ruoyu,Ki, Jang-Seu Elsevier 2018 CHEMOSPHERE - Vol.195 No.-

<P><B>Abstract</B></P> <P>Endocrine disrupting chemicals (EDCs) have toxic effects on algae; however, their molecular genomic responses have not been sufficiently elucidated. Here, we evaluated genome-scaled responses of the dinoflagellate alga <I>Prorocentrum minimum</I> exposed to an EDC, polychlorinated biphenyl (PCB), using a 6.0 K microarray. Based on two-fold change cut-off, we identified that 609 genes (∼10.2%) responded to the PCB treatment. KEGG pathway analysis showed that differentially expressed genes (DEGs) were related to ribosomes, biosynthesis of amino acids, spliceosomes, and cellular processes. Many DEGs were involved in cell cycle progression, apoptosis, signal transduction, ion binding, and cellular transportation. In contrast, only a few genes related to photosynthesis and oxidative stress were expressed in response to PCB exposure. This was supported by that fact that there were no obvious changes in the photosynthetic efficiency and reactive oxygen species (ROS) production. These results suggest that PCB might not cause chloroplast and oxidative damage, but could lead to cell cycle arrest and apoptosis. In addition, various signal transduction and transport pathways might be disrupted in the cells, which could further contribute to cell death. These results expand the genomic understanding of the effects of EDCs on this dinoflagellate protist.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Toxicogenomics in <I>P. minimum</I> exposed to polychlorinated biphenyl (PCB). </LI> <LI> Expressed genes involved in cell cycle, apoptosis, transport and signal transduction. </LI> <LI> Photosynthesisand ROS responsive genes did not show obvious changes in expressiont. </LI> <LI> PCB might not inhibit photosynthesis and induce considerable ROS formation. </LI> <LI> PCB might not cause chloroplast and oxidative damage, but could lead to cell cycle arrest and apoptosis. </LI> </UL> </P>

Incorporating BIM in the Final Semester Undergraduate Project of Construction Management - A Case Study in Fuzhou University

Liyuan Wang,Xueyuan Yan,Binghui Fan,Ruoyu Jin,Tong Yang,Georgios Kapogiannis 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.8

This pedagogical study presents building information modeling (BIM) education in the final semester construction management (CM) program. The case study conducted in Fuzhou University extends BIM education from a single BIM course in earlier undergraduate years to the senior year’s final semester project, which was designed to enable BIM utilization in multiple construction tasks (e.g., 3D site planning). This study consists of two major parts. The first part starts with the newly designed course of the final semester project of CM students. Students’ final semester project work is demonstrated depending on their selected deliverable type, which includes full BIM application group work, two partial BIM application types (i.e., construction planning/scheduling, and take-off estimate), and a research dissertation. The second part starts from the research hypothesis of whether the different deliverable type selected by students would affect their perceptions towards the final project and their professional career. Based on a follow-up questionnaire survey to the whole CM student sample aiming to test the hypotheses with statistical analyses (e.g., analysis of variance and the post-hoc analysis), it was indicated that all the four different deliverable types (i.e., subgroups) could lead to consistent perceptions of the final semester project towards their career development. However, subgroup differences were found. For example, students from the subgroup of full BIM application perceived that they had the highest level of hands-on skill enhancement throughout the project, possibly due to the fact that they linked BIM software tools to virtual reality (VR) hardware. Suggestions were provided to update the future BIM pedagogy in the final semester project, such as proper guide of CM students to opt their project deliverable type depending on their career interests, motivations in BIM utilization, and skill development needs. This current study provides insights in BIM education in terms that: 1) BIM education could be enhanced from a single course level to the senior year project in the CM program level; 2) different options offered in the final stage project within the CM curriculum might affect students’ perceptions towards BIM or their career development; and 3) the experience learned from this case study could be shared in the global community of construction education to update the curriculum incorporating information and communication technologies (e.g., BIM and VR). Future educational work in BIM could continue adopting existing educational theories (e.g., Bloom’s Taxonomy) by addressing the various levels of student learning, and viewing BIM in the bigger picture of digital construction.

Study on Surface Characteristics of E-glass Fiber Reinforced Epoxy Resin Composites in Different Stages of Tracking

Yongqiang Wang,Changhui Feng,Yu Luo,Ruoyu Fei 한국섬유공학회 2020 Fibers and polymers Vol.21 No.11

To study the variation of surface characteristics of glass fiber reinforced epoxy composite insulation materialsduring the development of tracking, this paper established an experimental platform for tracking under the inclined platemethod and prepared samples of glass fiber reinforced epoxy resin. In this paper, according to the experimental dischargephenomenon, discharge repetition rate phase diagram and corrosion degree of materials, the process of tracking was dividedinto four stages: initiation, stability, development and outbreak stages. Scanning electron microscope was used to observe thechange of micromorphology of samples in different stages of tracking. The content of elements in different stages of trackingwas determined by energy dispersive spectrometer. The surface characteristic functional groups in different stages of trackingwere measured by Fourier transform infrared spectroscopy. The results show that with the change of surface morphology andthe formation of surface products during tracking, the content of C element in the spherical region of the material decreasedfirst and then increased, and the content of O and Si increased first and then decreased. The epoxy group of the material wasgradually decomposed. Carbonyl group was generated on the surface of the material, and then decomposed during theoutbreak stages. In addition, the deterioration mechanism of thermal aging and tracking was quite different. Thermal agingprovided convenient routes for the electron injection into the material during tracking, thus reducing the tracking and erosionresistance of the material.

Redundant rule Detection for Software-Defined Networking

( Jian Su ),( Ruoyu Xu ),( Shiming Yu ),( Baowei Wang ),( Jiuru Wang ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.6

The emergence of Software Defined Networking (SDN) overcomes the limitations of traditional networking architectures. There are some advantages in SDN which are centralized global network view, programmability, and separation of the data plane and control plane. Due to the limitation of data plane storage capacity in SDN, it is necessary to process the redundancy rules of switch. In this paper, we propose a method for active detection and processing of redundant rules. We use the result generated by the customized probe package to detect redundant rules. And by checking the forwarding behavior of probe packets in the data plane, the redundancy rules are further processed. Furthermore, in order to quickly check the dynamic networks, we propose an incremental algorithms for rapidly evolve the network strategies. We conduct simulation experiments on Matlab to verify the feasibility of the algorithm. The influence of some parameters on the result are discussed.

Idle Slots Skipped Mechanism based Tag Identification Algorithm with Enhanced Collision Detection

( Jian Su ),( Ruoyu Xu ),( Shiming Yu ),( Baowei Wang ),( Jiuru Wang ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.5

In this article, a new Aloha-based tag identification protocol is presented to improve the reading efficiency of the EPC C1 Gen2-based UHF RFID system. Collision detection (CD) plays a vital role in tag identification process which determines the efficiency of anti-collision protocols since most Aloha-based protocols optimize the incoming frame length based on the collisions in current frame. Existing CD methods are ineffective in identifying collision, resulting in a degradation of identification performance. Our proposed algorithm adopts an enhanced CD (ECD) scheme based on the EPC C1 Gen2 standard to optimize identification performance. The ECD method can realize timely and effective CD by detecting the pulse width of the randomly sent by tags. According to the ECD, the reader detects the slot distribution and predicts tag cardinality in every collision slot. The tags involved in each collision slot are identified by independently assigned sub-frames. A large number of numerical results show that the proposed solution is superior to other existing anti-collision protocols in various performance evaluation metrics.

Rapid Detection of Lily mottle virus and Arabis mosaic virus Infecting Lily (Lilium spp.) Using Reverse Transcription Loop-Mediated Isothermal Amplification

Yubao Zhang,Yajun Wang,Zhongkui Xie,Ruoyu Wang,Zhihong Guo,Yuhui He 한국식물병리학회 2020 Plant Pathology Journal Vol.36 No.2

The Lily mottle virus (LMoV) impedes the growth and quality of lily crops in Lanzhou, China. Recently Arabis mosaic virus (ArMV) has been detected in LMoV- infected plants in this region, causing plant stunting as well as severe foliar symptoms, and likely posing a threat to lily production. Consequently, there is a need to develop simple, sensitive, and reliable detection methods for these two viruses to prevent them from spreading. Reverse transcription (RT) loop-mediated isothermal amplification (LAMP) assays have been de- veloped to detect LMoV and ArMV using two primer pairs that match six conserved sequences of LMoV and ArMV coat proteins, respectively. RT-LAMP assay results were visually assessed in reaction tubes using green fluorescence and gel electrophoresis. Our assays successfully detected both LMoV and ArMV in lily plants without the occurrence of viral cross-reactivity from other lily viruses. Optimal conditions for LAMP reactions were 65°C and 60°C for 60 min for LMoV and ArMV, respectively. Detection sensitivity for both RT-LAMP assays was a hundredfold greater than that of our comparative RT-polymerase chain reaction as- says. We have also found this relatively rapid, target specific and sensitive method can also be used for samples collected in the field and may be especially useful in regions with limited or no laboratory facilities.