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- 저자 : Jun Cao (검색결과 194 건)
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Solubilities of Calcium and Zinc Lactate in Water and Water - Ethanol Mixture
Cao, Xue Jun,Lee, Ho Joon,Yun, Hyun Shik,Koo, Yoon Mo 한국화학공학회 2001 Korean Journal of Chemical Engineering Vol.18 No.1
The solubility of lactate salts, L(+) and DL( ±) forms of calcium and zinc lactate in water at temperature between 5 and 80℃, was measured and empirical equations were obtained by regression of solubility-temperature data. The equations can be used to calculate the solubility of calcium and zinc lactate at a given temperature. The change in solubility of L(+) and DL( ±) calcium and zinc lactate in water-ethanol mixture at 20℃ was also investigated. The solubilities of calcium and zinc lactate were lowered by the addition of ethanol to the solution.
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Image Enhancement Algorithm and its Application in Image Defogging
Jun Cao 한국정보처리학회 2023 Journal of information processing systems Vol.19 No.4
An image enhancement algorithm and image defogging method are studied in this paper. The formation of fogand the characteristics of fog image are analyzed, and the fog image is preprocessed by histogram equalizationmethod; then the additive white noise is removed by foggy image attenuation model, the atmospheric scatteringphysical model is constructed, the image detail characteristics are enhanced by image enhancement method,and the visual effect of defogging image is enhanced by guided filtering method. The proposed method has agood defogging effect on the image. When the number of training iterations is 3,000, the peak signal-to-noiseratio of the proposed method is 43.29 dB and the image structure similarity is 0.9616, indicating excellentimage defogging effect.
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Design of Fractional Order Controller Based on Particle Swarm Optimization
Jun-Yi Cao,Bing-Gang Cao 대한전기학회 2006 International Journal of Control, Automation, and Vol.4 No.6
An intelligent optimization method for designing Fractional Order PID (FOPID) controllers based on Particle Swarm Optimization (PSO) is presented in this paper. Fractional calculus can provide novel and higher performance extension for FOPID controllers. However, the difficulties of designing FOPlD controllers increase, because FOPID controllers append derivative order and integral order in comparison with traditional PID controllers. To design the parameters of FOPID controllers, the enhanced PSO algorithms is adopted, which guarantee the particle position inside the defined search spaces with momentum factor. The optimization performance target is the weighted combination of ITAE and control input. The numerical realization of FOPlD controllers uses the methods of Tustin operator and continued fraction expansion. Experimental results show the proposed design method can design effectively the parameters of FOPID controllers.
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Jun-Wei Cao,Gui-Hua Zhang,Dae-Wan Kim 한국디지털융합학회 2021 IJICTDC Vol.6 No.2
The service quality of mobile health apps is a crucial factor affecting users’ satisfaction. For analyzing the influence of service quality of mobile health apps on users’ satisfaction in China, a hypothetical model with three dimensions and eight variables was established. Then this hypothetical model was combined with the model of mobile health service quality and hypotheses were proposed based on the actual situations according to the updated D&M information system success (UMDISS) theory. Questionnaires were issued to collect data and the SEM-PLS method was used to valid the hypothetical model and hypotheses. The reliability and security of the system quality of mobile health apps positively impacted the users’ satisfaction. The cooperation and personalization of service quality had a significant impact on the users’ willingness to use mobile health apps. Through multi-group analyses, it was found that the relationship between mobile health app system quality, users’ satisfaction, and the use of mobile health apps differed under different familiarities with mobile health apps. This study is expected to provide theoretical guidance for the marketing of mobile health apps.
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조소군(Cao, Xiao-Jun)(曹筱君) 대한중국학회 2019 중국학 Vol.69 No.-
伴随着第四次工业革命的到来,我们的教育越发注重培养学生的发问讨论和沟通协作能力。而Havruta学习法正符合当前的教育重心。所以本文的研究目的就是想尝试性将这一方法引进韩国的大学汉语课堂上,从而提高学生学习汉语的能力。在本文一开头的绪论部分就先对引进Havruta学习法对对外汉语教学的重要性进行说明。接着在第二章内,着重介绍前人的研究来说明什么是Havruta学习法。在本文的第三章内,详实地介绍笔者是如何设计和实际操作的具体过程。在本论文中,一共介绍了三个正在使用中的Havruta学习法教学模式,从课前教案的设计,到实际实践的过程,再到对学生的作业要求和打评标准等,将一一进行说明。在最后的第四章中,就结合学生的反馈,谈一谈笔者对今后更深层次的Harvata学习法研究方向的思考和看法。 With the arrival of the Fourth Industrial Revolution, our education has been increasingly focus on developing students ability of questioning, discussion, communication and collaboration. However the Harvard learning method is in line with the current educational focus. To make the Harvard learning method can be applied to any level of Mandarin students, including entry level student who just started to learn initial consonant and syllable rime. Therefore, the purpose of this article is planning to introduce the method to Korean Mandarin class to enhance Korean student language learning ability. The thesis emphasize the application structure and detailed practice of Harvard Chinese learning method in the following chapters. Introduce the significance of the Harvard learning method for Chinese learning. In the following second chapters will focus on explain what is Harvard learning method base on prior study. How to design the actual operation process will be described more in the third chapter. The thesis make a sound analysis and exposition of three Harvard teaching modules: class design, actual practice and post study assessment. In the final chapter, brief the Harvard learning method future research interests integrate students feedback.
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