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Evaluation and Optimization of Resource Allocation among Multiple Networks
( Dexiang Meng ),( Dongchen Zhang ),( Shoufeng Wang ),( Xiaoyan Xu ),( Wenwen Yao ) 한국인터넷정보학회 2013 KSII Transactions on Internet and Information Syst Vol.7 No.10
Many telecommunication operators around the world have multiple networks. The networks run by each operator are always of different generations, such as 2G and 3G or even 4G systems. Each system has unique characters and specified requirements for optimal operation. It brings about resource allocation problem among these networks for the operator, because the budget of each operator is limited. However, the evaluation of resource allocation among various networks under each operator is missing for long, not to mention resource allocation optimization. The operators are dying for an algorithm to end their blind resource allocation, and the Resource Allocation Optimization Algorithm for Multi-network Operator (RAOAMO) proposed in this paper is what the operators want. RAOAMO evaluates and optimizes resource allocation in the view of overall cost for each operator. It outputs a resource distribution target and corresponding optimization suggestion. Evaluation results show that RAOAMO helps operator save overall cost in various cases.
Development of Augmented Reality Indoor Navigation System based on Enhanced A* Algorithm
( Dexiang Yao ),( Dong-won Park ),( Syung-og An ),( Soo Kyun Kim ) 한국인터넷정보학회 2019 KSII Transactions on Internet and Information Syst Vol.13 No.9
Nowadays modern cities develop in a very rapid speed. Buildings become larger than ever and the interior structures of the buildings are even more complex. This drives a high demand for precise and accurate indoor navigation systems. Although the existing commercially available 2D indoor navigation system can help users quickly find the best path to their destination, it does not intuitively guide users to their destination. In contrast, an indoor navigation system combined with augmented reality technology can efficiently guide the user to the destination in real time. Such practical applications still have various problems like position accuracy, position drift, and calculation delay, which causes errors in the navigation route and result in navigation failure. During the navigation process, the large computation load and frequent correction of the displayed paths can be a huge burden for the terminal device. Therefore, the navigation algorithm and navigation logic need to be improved in the practical applications. This paper proposes an improved navigation algorithm and navigation logic to solve the problems, creating a more accurate and effective augmented reality indoor navigation system.
Online Banking Analysis Using Two Stage DEA Model
Dexiang Wu,Liang Liang 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10
The efficiency appraisal of the commercial bank especially online banking is of great significance, which can help evaluate the circumstance and make optimum decision among series of choices. Performance evaluation is of great importance for effective enterprise management. The foundation of efficiency evaluation is to faithfully identify the corresponding production possibility set. in this paper we are using two stage DEA model to analyze the efficiency of the online banking. The procedure is used to appraise the target"s evaluation to 31 online banking from Mainland China to Taiwan in China. The result indicates that financial lever of above-mentioned two actions opimized the efficiency of the listed online banking.
Jia Dexiang,Li Xinda,Guo Shaodong,Liu Fang,Fu Chengcheng,Huang Xingde,Dong Zhen,Liu Jing 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.3
On the one hand, as a substitute for traditional fuel vehicles, electric vehicles (EV) is an important measure to achieve “carbon peak and carbon neutralization” in transportation. On the other hand, as an energy storage unit in the new power system, it can make up for the disadvantages brought by renewable energy power generation. Therefore, scientifc and efective evaluation of EV benefts is the premise to promote the development of EV. In view of the characteristics of EV involving many interest groups and huge market potential, this paper introduces the comprehensive evaluation theory in operations research: analytic hierarchy process (AHP) and entropy weight method, and combines the respective advantages of the two methods to avoid the distortion of evaluation results caused by a single evaluation method. First of all, under the background of building a new power system and realizing a powerful automobile country, the EV promotion beneft evaluation index system is constructed from fve frst-class indexes and 18 s-class indexes of consumers, distribution network, charging network, social beneft and environmental beneft. Then, aiming at the shortcomings of single evaluation method, the subjective and objective combination method of AHP entropy weight method is established to solve each weight index, so as to realize the scientifc quantifcation of the index. Finally, a certain area of a coastal city is selected for example analysis. The results show that the evaluation method established in this paper has a positive efect on EV promotion, and can provide suggestions for EV promotion.
21세기를 맞으며 : Reform of High school Education in China 중국고등교육의 개혁
張德祥 평택대학교 1998 論文集 Vol.10 No.2
중국고등교육의 개혁은 체제, 구조, 구성의 합리화와 교육의 질과 학교운영의 수준을 높이기 위해 전면적으로 소질을 종합화하는 교육을 강화하여, 21세기를 맞이하며 교학내용과 과정의 체계를 개혁하여, 고등교육의 교학평가제도 및 지표체계와 평가방법을 세우고 완비한다.
Fenghuang Cai,Dexiang Lu,Qiongbin Lin,Wu Wang 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5
Dual-mode photovoltaic power system should be capable of operating in grid-connected (GC) and stand-alone (SA) modes for distributed generation. Under different working modes, the optimal parameters of inverter output filters vary. Inverters commonly operate in GC mode, and thus, a small capacitance is beneficial to the GC topology for achieving a reasonable compromise. A predictive current control scheme is proposed to control the grid current in GC mode and thereby obtain high-performance power. As filter are not optimal under SA mode, a compound control strategy consisting of predictive current control, instantaneous voltage control, and repetitive control is proposed to achieve low total harmonic distortion and improve the output voltage spectrum. The seamless transfer between GC mode and SA mode is illustrated in detail. Finally, the simulation and experimental results of a 4 ㎸A prototype demonstrate the effectiveness of the proposed control strategy.