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- 저자 : Zhongyuan Zhao (검색결과 5 건)
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Sample-based Dynamic Event-triggered Algorithm for Optimization Problem of Multi-agent Systems
Zhongyuan Zhao 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.8
The convex optimization problem of multi-agent systems is investigated. In order to deduce the communication burden of the system and simplify the implementation of the algorithm on the digital controllers, a sample-based event-triggered optimization algorithm is proposed and a novel dynamic event-trigged condition is designed. The global optimal solution can be obtained exponentially. The event-triggered time intervals are significantly enlarged by dynamic event-triggered condition. Moreover, Zeno behavior is excluded due to sampling control mechanism in our scheme. Two numerical cases are presented to validate the relevant results.
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Wenhui Guo,Shuhu Guo,Xu Zhao,Zhenjun Yuan,Yu Zhao,Xin Chang,Hong Li,Xiong Zhao,Ye Wan,Dazhou Yan,Zhongyuan Ren,Xiaolei Fan,Xin Gao 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
Ultra-high-purity (UHP) electronic-grade octamethylcyclotetrasiloxane (D4) is the key precursor of lowdielectricconstant (low-k) SiCOH films to manufacture integrated circuits (IC), meeting the stringentrequirements of the rapidly developing semiconductor industry. Commonly, metallic impurities in D4were removed by multiple unit operations of adsorption, filtration, and distillation, which could reducethe concentration of a single metallic impurity below 1 ppb. However, D4 with higher purity is requiredby semiconductor production due to an increase in transistor density. Herein, a novel method based onthe integrated simultaneous distillation–extraction (SDE) was developed for manufacturing UHPelectronic-grade D4. The lab and pilot scale experiments showed that the purity of water and D4 has apositive correlation. Based on the experimental data, a double-column process, consisting of azeotropic/extractive distillation column and precision distillation column with UNIQUAC method, was establishedto access the feasibility of scaling up the SDE process. According to the simulation results, D4with the purity > 99.999 wt.% and total metallic impurities (TMI) content below 1 ppb could be obtainedusing ultra-pure water.
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Synthesis and electrochemical applications of nitrogen-doped carbon nanomaterials
Majeed, Saadat,Zhao, Jianming,Zhang, Ling,Anjum, Saima,Liu, Zhongyuan,Xu, Guobao Walter de Gruyter GmbH 2013 Nanotechnology Reviews Vol.2 No.6
<B>Abstract</B><P>Nitrogen doping is an effective way to tailor the properties of the shaped carbon materials, including the nanotubes, nanocups, nanofibers, as well as the nanorods, and render their potential use for various applications. The common bonding configurations obtained on the N insertion is the pyridinic N and pyrrolic N, which impart the characteristic properties to these carbon materials. This review will focus on the nitrogen-doped carbon materials, the doping effect on the electrochemistry of the doped nanomaterials, and the various synthetic methods to introduce N into the carbon network. The potential applications of the N-doped materials are also reviewed on the basis of the experimental and theoretical studies in electrochemistry.</P>
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Research and Application of Intelligent Recommendation System Based on Big Data Technology
Yongfeng Cui,Yuankun Ma,Zhongyuan Zhao 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.8
With the rapid development of information technology and the Internet, people entered the era of information overload. Recommended system is an effective tool to solve the problem of information overload, it is based on the historical behavior of users and other records of interest to the user modeling, and then use the model to create user interest personalized recommendation, the interested user information, products. Online Intelligence is a new research direction, which integrates the latest achievements of artificial intelligence and information technology, greatly emphasizes on the Internet means intelligent application of data mining technology in the online intelligence research has a very important position. This paper presents a project-based collaborative filtering algorithm hierarchical similarity. Users to take advantage of some of the projects marked tags and project categories were automatically extended, to establish a hierarchy of all projects, and then use similar items tag hierarchy established between computing projects. Experimental results show that compared with traditional collaborative filtering algorithm, the ability of collaborative filtering algorithm based on similarity of item level can significantly improve the recommendation system to handle large data presented in this paper.
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2D-2D heterostructured composites Bi4O5Br2-SnS2 with boosted photocatalytic NOx abatement
Fei Chang,Zhixun Wei,Zhongyuan Zhao,Yingfei Qi,Deng-guo Liu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.117 No.-
A desirable photocatalytic system ought to feature efficient NOx removal and retardance of toxic NO2 generation. In this investigation, a series of novel two-denominational (2D)-2D composites Bi4O5Br2-SnS2 (XBS) were successfully fabricated through a simple mechanical ball-milling route and characterized systematically. The coexistence of both expected components was confirmed. 2D morphologies of both componentswere stacked in face-to-face manner and thus formed heterojunction structures, verified by SEMand TEM patterns. The visible-light absorption was enhanced in composites caused by the shrinkage ofband gaps. With microstructural and optical merits, these binary composites showed reinforced photocatalyticabatement of NOx and attenuated generation of toxic NO2 under visible light, compared withbare Bi4O5Br2. Successive recycling catalytic experiments revealed the satisfactory reusability and structuralstability of achieved composites. Ultimately, a reasonable type-II model was deduced to describe themigration and transfer of interface carriers based on experimental and analytical results. Such workdesigned and provided various bismuth-based composites constructed by the simple mechanical ballmillingfor controlling and treating nitrogen oxides at ppb level in the atmospheric environment.
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