Outdoor Spray Robot Localization Based on Multi Sensor System

B. Chen(Chen Bo),C. B. Moon(문창배) Korean Society for Precision Engineering 2019 한국정밀공학회 학술발표대회 논문집 Vol.2019 No.10월

Emergent damage pattern recognition using immune network theory

Bo Chen,Chuanzhi Zang 국제구조공학회 2011 Smart Structures and Systems, An International Jou Vol.8 No.1

This paper presents an emergent pattern recognition approach based on the immune network theory and hierarchical clustering algorithms. The immune network allows its components to change and learn patterns by changing the strength of connections between individual components. The presented immunenetwork- based approach achieves emergent pattern recognition by dynamically generating an internal image for the input data patterns. The members (feature vectors for each data pattern) of the internal image are produced by an immune network model to form a network of antibody memory cells. To classify antibody memory cells to different data patterns, hierarchical clustering algorithms are used to create an antibody memory cell clustering. In addition, evaluation graphs and L method are used to determine the best number of clusters for the antibody memory cell clustering. The presented immune-network-based emergent pattern recognition (INEPR) algorithm can automatically generate an internal image mapping to the input data patterns without the need of specifying the number of patterns in advance. The INEPR algorithm has been tested using a benchmark civil structure. The test results show that the INEPR algorithm is able to recognize new structural damage patterns.

2010 Asian WTO Research Network (AWRN) Seoul Meeting : Establishing China`s Trade Adjustment Assistance for FTA

( Bo Chen ) 고려대학교 법학연구원 2010 Korea University Law Review Vol.8 No.-

The research introduces the theory of TAA, and study the probably impact of FTA on china`s industry. As the present remedy measures are deficient and cannot ensure that the enterprises and workers adjust smoothly, it probably is an advisable and feasible choice for china to establish a TAA program for FTA.

Possibility Distribution of Wind Power Fluctuation

Bo Chen,Yuan Li 보안공학연구지원센터(IJUNESST) 2015 International Journal of u- and e- Service, Scienc Vol.8 No.1

Volatility is the fixed property of wind power, how to describe the volatility of wind power quantitatively lacks effects methods currently. Based on the analysis of large quantities of testing data, it can be found that it is possible to adopt normal distribution to describe the possibility distribution of wind power fluctuating characteristics. Analysis demonstrates that min level component of wind power nearly occupies 2%-5% of the installed capacity of wind power station: when multiple wind power station outputs are overlapped, it can effectively reduce the proportion of min level component: the type of fans has very tiny effects on wind power fluctuation characteristics, but the current wind power out of wind power station has almost on influence on wind power fluctuation characteristics. Normal distribution also adapts to describe the possibility distribution of averaged power variation in adjacent time interval of wind power station, after the time interval is lengthened, due to decreased wind speed correlations, fluctuation characteristics of averaged power in adjacent intervals enhance.

Research on the Performance Evaluation of Museums in China

Bo Chen(전보),XinXiu Qiu(츄신슈) 한국문화정책학회 2016 문화정책 Vol.3 No.1

As an important part of China"s public cultural service system, the museum is an important way to meet the people"s cultural needs. In order to study the operation of Chinese museums in recent years, especially after free admissions, this paper calculates the relative efficiency of the museums in the 31 provinces (autonomous regions and municipalities) of the mainland from 2005 to 2014 by using the DEA method. It finds the overall operations of museum improved, and that the free charge policy played a positive role in promoting the development of museums. The number of provinces with effective DEA (Data Envelopment Analysis) has been increasing since 2008. The comprehensive efficiency value and the pure technical efficiency value as well as the scale efficiency value has risen unceasingly, while the gap between provinces has been shrinking, leaving regional differences of museum efficiency is small. The free admission policy had a relatively greater positive effect in the East as compared to the West.

Seismic behavior of structures isolated with a hybrid system of rubber bearings

Bo-Jen Chen,L. L. Chung,Tsu-Cheng Chiang,C. S. Tsai 국제구조공학회 2006 Structural Engineering and Mechanics, An Int'l Jou Vol.22 No.6

Response evaluation and vibration control of a transmission tower-line system in mountain areas subjected to cable rupture

Chen, Bo,Wu, Jingbo,Ouyang, Yiqin,Yang, Deng Techno-Press 2018 Structural monitoring and maintenance Vol.5 No.1

Transmission tower-line systems are commonly slender and generally possess a small stiffness and low structural damping. They are prone to impulsive excitations induced by cable rupture and may experience strong vibration. Excessive deformation and vibration of a transmission tower-line system subjected to cable rupture may induce a local destruction and even failure event. A little work has yet been carried out to evaluate the performance of transmission tower-line systems in mountain areas subjected to cable rupture. In addition, the control for cable rupture induced vibration of a transmission tower-line system has not been systematically conducted. In this regard, the dynamic response analysis of a transmission tower-line system in mountain areas subjected to cable rupture is conducted. Furthermore, the feasibility of using viscous fluid dampers to suppress the cable rupture-induced vibration is also investigated. The three dimensional (3D) finite element (FE) model of a transmission tower-line system is first established and the mathematical model of a mountain is developed to describe the equivalent scale and configuration of a mountain. The model of a tower-line-mountain system is developed by taking a real transmission tower-line system constructed in China as an example. The mechanical model for the dynamic interaction between the ground and transmission lines is proposed and the mechanical model of a viscous fluid damper is also presented. The equations of motion of the transmission tower-line system subjected to cable rupture without/with viscous fluid dampers are established. The field measurement is carried out to verify the analytical FE model and determine the damping ratios of the example transmission tower-line system. The dynamic analysis of the tower-line system is carried out to investigate structural performance under cable rupture and the validity of the proposed control approach based on viscous fluid dampers is examined. The made observations demonstrate that cable rupture may induce strong structural vibration and the implementation of viscous fluid dampers with optimal parameters can effectively suppress structural responses.

OFPT: OpenFlow based Parallel Transport in Datacenters

( Bo Liu ),( Bo Xu ),( Chao Hu ),( Hui Hu ),( Ming Chen ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.10

Although the dense interconnection datacenter networks (DCNs) (e.g. FatTree) provide multiple paths and high bisection bandwidth for each server pair, the single-path TCP (SPT) and ECMP which are widely used currently neither achieve high bandwidth utilization nor have good load balancing. Due to only one available transmission path, SPT cannot make full use of all available bandwidth, while ECMP`s random hashing results in many collisions. In this paper, we present OFPT, an OpenFlow based Parallel Transport framework, which integrates precise routing and scheduling for better load balancing and higher network throughput. By adopting OpenFlow based centralized control mechanism, OFPT computes the optimal path and bandwidth provision for each flow according to the global network view. To guarantee high throughput, OFPT dynamically schedules flows with Seamless Flow Migration Mechanism (SFMM), which can avoid packet loss in flow rerouting. Finally, we test OFPT on Mininet and implement it in a real testbed. The experimental results show that the average network throughput in OFPT is up to 97.5% of bisection bandwidth, which is higher than ECMP by 36%. Besides, OFPT decreases the average flow completion time (AFCT) and achieves better scalability.

Competitive Influence Maximization on Online Social Networks under Cost Constraint

( Bo-lun Chen ),( Yi-yun Sheng ),( Min Ji ),( Ji-wei Liu ),( Yong-tao Yu ),( Yue Zhang ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.4

In online competitive social networks, each user can be influenced by different competing influencers and consequently chooses different products. But their interest may change over time and may have swings between different products. The existing influence spreading models seldom take into account the time-related shifts. This paper proposes a minimum cost influence maximization algorithm based on the competitive transition probability. In the model, we set a one-dimensional vector for each node to record the probability that the node chooses each different competing influencer. In the process of propagation, the influence maximization on Competitive Linear Threshold (IMCLT) spreading model is proposed. This model does not determine by which competing influencer the node is activated, but sets different weights for all competing influencers. In the process of spreading, we select the seed nodes according to the cost function of each node, and evaluate the final influence based on the competitive transition probability. Experiments on different datasets show that the proposed minimum cost competitive influence maximization algorithm based on IMCLT spreading model has excellent performance compared with other methods, and the computational performance of the method is also reasonable.

A GFP-labeled Human Colon Cancer Metastasis Model Featuring Surgical Orthotopic Implantation

Chen, Hong-Jin,Yang, Bo-Lin,Chen, Yu-Gen,Lin, Qiu,Zhang, Shu-Peng,Gu, Yun-Fei Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.9

Colorectal cancer has become a major disease threatening human health. To establish animal models that exhibit the characteristics of human colorectal cancer will not only help to study the mechanisms underlying the genesis and development effectively, but also provide ideal carriers for the screening of medicines and examining their therapeutic effects. In this study, we established a stable, colon cancer nude mouse model highly expressing green fluorescent protein (GFP) for spontaneous metastasis after surgical orthotopic implantation (SOI). GFP-labeled colon cancer models for metastasis after SOI were successfully established in all of 15 nude mice and there were no surgery-related complications or deaths. In week 3, primary tumors expressing GFP were observed in all model animals under fluoroscopy and two metastatic tumors were monitored by fluorescent imaging at the same time. The tumor volumes progressively increased with time. Seven out of 15 tumor transplanted mice died and the major causes of death were intestinal obstruction and cachexia resulting from malignant tumor growth. Eight model animals survived at the end of the experiment, 6 of which had metastases (6 cases to mesenteric lymph nodes, 4 hepatic, 2 pancreatic and 1 mediastinal lymph node). Our results indicate that our GFP-labeled colon cancer orthotopic transplantation model is useful with a high success rate; the transplanted tumors exhibit similar biological properties to human colorectal cancer, and can be used for real-time, in vivo, non-invasive and dynamic observation and analysis of the growth and metastasis of tumor cells.