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Query and Analysis of Data on Electric Consumption Based on Hadoop
Jianjun Zhou,Yi Wu 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.2
Traditional data management is usually based on relational databases, which are capable of managing small amounts of data. But relational databases have some difficulty in inquiry, management, and analysis of large amounts of data and magnanimity data. The method of effective management of magnanimity data is a problem deserving of study. In this paper, traditional relational databases are moved to Hadoop, in order to implement query and analysis on Hadoop. This paper changes the amount of data record and number of nodes in clusters, and records the query time in different conditions. Advantages and disadvantages of query on Hadoop can be analyzed by comparing the statistics with the query time on relational database Oracle. The factors affecting the time of query on Hadoop can be found by analysis. Furthermore, the result is also a reference material of future research and data managements on cloud platforms.
Design and Implementation of Knowledge based Cloud Platform for NSFC Service System
Jianjun Li,Yuhui Zheng,Jin Wang 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.12
With the quickly development of Natural Science Foundation of China (NSFC) foundations, management of mass fund-relevant digital data, such as researchers and institutions, academic achievement, funds and so on, is becoming more and more important for supporting basic scientific research. In this paper, we fully introduce the design and implementation of NSFC cloud platform that will be implemented in the service system of knowledge base. Firstly, the whole cloud platform architecture is presented. Then we introduce the system software and equipment environment of our platform. Lastly, we present the construction of private cloud, network components, storage components, and computing components, respectively, with illustrative figures and tables.
Construction Scheme of NSFC Open Access Library
Jianjun Li,Minshe Zhang,Dong Li,Wei Zhang,Jin Wang 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.8
With the fast development of Open Access (OA) in recent years, it helps stimulate free scientific achievements propagation via Internet and promote academic exchange and fast publishing in an efficient and cheap way. In this paper, we propose a construction scheme of our Natural Science Foundation of China (NSFC) open access library which is under development recently. We first propose our overall architecture for OA library. Then, we present detailed design from upper layer OA webpage with 3-level display hierarchy to the middle layer some key function modules. Next, bottom layer raw data acquisition module and other important system function modules like interface module, people management and security modules are explained with illustrative figures and table.
Electromechanical analysis of 2-2 cement-based piezoelectric transducers in series electrically
Jianjun Wang,Zhifei Shi 국제구조공학회 2014 Smart Structures and Systems, An International Jou Vol.14 No.3
his paper aims to present the analytical solutions of 2-2 cement based piezoelectric transducers in series electrically based on the theory of piezo-elastic dynamics. The solutions of two different kinds of 2-2 cement based piezoelectric transducers under external harmonic load are obtained by using the displacement method. The effects of electrical connection of piezoelectric layers, loading frequency, thickness and distance of piezoelectric layers on the characteristics of the transducers are discussed. Comparisons with other related experimental investigations are also given, and good agreement is found. The proposed 2-2 cement based piezoelectric transducers have a great potential application in monitoring structural health in civil engineering and capturing mechanical energy or monitoring train-running safety in railway system and traffic safety in road system.
A Novel Text Copy Detection Method based on Semantic Feature
Jianjun Zhang,Xingming Sun,Jin Wang 보안공학연구지원센터 2014 International Journal of Database Theory and Appli Vol.7 No.5
With the rapid development of the Internet, getting shared resource on the network is becoming more easy, and various plagiarize is becoming to breed, so the research of text copy detection technology is becoming more important. The traditional copy detection technology is based on term frequency statistics, and does not consider the context semantic. Some plagiarism can be easily made by replacing synonyms, changing the sentence structure, or translating from one language to another language. But the traditional copy detection technology could not detect such plagiarism. In this paper, a text copy detection method based on semantic is proposed. By using an improved TFIDF algorithm, terms could be more accurately extracted from each document in the corpus. By putting the documents corresponding to the terms one by one, a terms category is built in the database. When a document is detecting, the terms are read from the database and matched. The testing results show that, compared to the traditional TFIDF algorithm, the improved method could more accurately detect the plagiarism.
Jianjun Zhu,Ge Luo,Qiuli He,Ming Yao 대한통증학회 2022 The Korean Journal of Pain Vol.35 No.1
Background: Different views have been proposed on the radiofrequency treatment modes and parameters of radiofrequency thermocoagulation of the spinal dorsal root ganglion for the treatment of postherpetic neuralgia (PHN). It is urgent to identify a more effective therapy for patients with PHN. Methods: Patients who underwent radiofrequency thermocoagulation therapy for PHN were retrospectively reviewed and were divided into a radiofrequency thermocoagulation (CRF) and double neddles radiofrequency thermocoagulation (DCRF). The pain scores (numerical rating scale, NRS) were evaluated at the following time points: before the operation, 1 day, 3 months, 6 months, 1 year, and 2 years after operation. The incidence of complications and the degree of pain relief were evaluated. The in vitro ovalbumin experiment was used to indicate the effects of radiofrequency thermocoagulation. Results: Compared with the preoperative NRS scores, the postoperative NRS scores decreased significantly; the NRS scores of the DCRF group was lower than that of the CRF group at all time points from 6 months to 2 years following the operation. The total effective rate of the DCRF group was significantly higher than that of the CRF group at 2 years following the operation. The incidence of numbness in the DCRF group was higher than that noted in the CRF group. The ovalbumin experiments in vitro indicated that the effects of radiofrequency thermocoagulation were optimal when the distance between the two needles was 5 mm. Conclusions: DCRF with a 5 mm spacing exhibits a longer duration and higher effective rate in the treatment of PHN and is worth promoting.