Effect of Cu doping on the SCR activity of CeO2 catalyst prepared by citric acid method

Rui-Tang Guo,Wen-long Zhen,Wei-Guo Pan,Yue Zhou,Jie-nan Hong,Hong-jian Xu,Qiang Jin,Cheng-gang Ding,Shi-yi Guo 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4

CeO2–CuO catalyst prepared by citric acid method was investigated for selective catalytic reduction of NO with NH3. The activity of the CeO2 catalyst was enhanced about 8–27% in the temperature range of 125–225 ℃ at a space velocity of 28,000 h 1 by the addition of Cu. It was found that the state of Cu species had great impact on the SCR performance of CeO2–CuO catalyst. Cu2+ can enhance the low temperature activity of SCR reaction, while CuO would promote NH3 oxidation before SCR reaction at high temperature, which would cause the decrease of its high temperature SCR activity.

형용사 유형론과 중국어 형용사의 문법적 지위

郭銳原(Rui Guo),朴恩石(번역자) 중국어문논역학회 2014 中國語文論譯叢刊 Vol.0 No.35

Guo Rui said “there has been differing opinions in terms of the grammatical nature of Chinese adjectives”. He said “the goal of this paper is to identify property words as modificative or predicative from a typological perspective”. He said “property words of 72 languages in the world are investigated according to the criteria of being marked or unmarked when functioning as attribute or predicate, and five types of grammatical nature of property words are differentiated”. He said “Chinese property words belong to the fourth type”. He said “namely Chinese property words can be classified into three types: a. predicative, b. modificative, c. both modificative and predicative”. He said “the best solution in the light of Chinese property words is to classify a. and c. as adjective, and classify c. as attributive”. He said “on the bases of the above analysis, the idea of correspondence between semantic categories and prototypes of parts of speech is suggested from the binary divergence of substance and property”. He said “the strength of degree and constancy is the main factor of coding constant property words as predicate or modifier, and the difference between languages mainly manifests in the processing of constant property words”.

Effect of preparation methods on the performance of CeO2/Al2O3catalysts for selective catalytic reduction of NO with NH3

Rui-Tang Guo,Yue Zhou,Wei-Guo Pan,Jie-nan Hong,Wen-long Zhen,Qiang Jin,Cheng-gang Ding,Shi-yi Guo 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.6

CeO2/Al2O3 catalysts prepared by three methods were investigated for selective reduction of NO with NH3. It was found that the catalyst prepared by the single step sol–gel method had the best SCR activity and SO2 resistance performance. From the results of BET, XRD, TPD and TPR, it can be concluded that large surface area, strong interaction, highly dispersed nano-crystalline ceria, high NH3 adsorption capacity and good redox ability might be the main reasons for the excellent performance of CeO2/Al2O3catalyst prepared by the single step sol–gel method.

Effect of Dietary Conjugated Linoleic Acid on Growth, Lipid Class, and Fatty Acid Composition in Rainbow Trout(Oncorhynchus mykiss)

Guo, Rui,Jeong, U-Cheol,Kang, Seok-Joong,Choi, Yeung-Jun,Choi, Byeong-Dae The Korean Society of Fisheries and Aquatic Scienc 2008 Fisheries and Aquatic Sciences Vol.11 No.3

The development of a fish that functionally provides both antioxidant and fat-reducing effects is an important goal in nutrition and aquaculture research. Dietary conjugated linoleic acid(CLA) can be successfully incorporated in fish muscle and viscera, but CLA and carotenoids have not been evaluated in such fish. An 8 weeks growth trial was conducted using rainbow trout, and all fish were fed twice daily with experimental diets containing graded amounts of CLA(1% and 5%). At the end of the experiment, the daily growth index, feed conversion rate, lipid class, and fatty acid composition were determined. Dietary CLA did not enhance the growth parameters of rainbow trout but did improve the feed conversion rate. The muscular polar lipid content decreased during the feeding period, while the content was stable in the viscera. In addition, a diet high in CLA decreased the polyunsaturated fatty acid content, but had no effect on the content of monounsaturated and saturated fatty acid in muscle.

Effects of Dietary Conjugated Linoleic Acid on Growth Lipid Class, and Fatty Acid Composition in Rainbow Trout (Oncorhynchus mykiss)

Rui Guo,정우철,강석중,최영준,최병대 한국수산과학회 2008 Fisheries and Aquatic Sciences Vol.11 No.3

The development of a fish that functionally provides both antioxidant and fat-reducing effects is an important goal in nutrition and aquaculture research. Dietary conjugated linoleic acid (CLA) can be successfully incorporated in fish muscle and viscera, but CLA and carotenoids have not been evaluated in such fish. An 8 weeks growth trial was conducted using rainbow trout, and all fish were fed twice daily with experimental diets containing graded amounts of CLA (1% and 5%). At the end of the experiment, the daily growth index, feed conversion rate, lipid class, and fatty acid composition were determined. Dietary CLA did not enhance the growth parameters of rainbow trout but did improve the feed conversion rate. The muscular polar lipid content decreased during the feeding period, while the content was stable in the viscera. In addition, a diet high in CLA decreased the polyunsaturated fatty acid content, but had no effect on the content of monounsaturated and saturated fatty acid in muscle.

Effect of the dietary conjugated linoleic acid mixed carotenoid on rockfish

Rui Guo,Grace Palmos,Seok-Jong Kang,Young-Jun Choi,Byeong-Dae Choi 한국생물공학회 2008 한국생물공학회 학술대회 Vol.2008 No.4

Quantificational Measurement of China-North Korea Relations after the End of the Cold War: Changes, Characteristics, and Elicitation

( Guo Rui ),( Xiao Ke Wang ) 한국국방연구원 2013 The Korean Journal of Defense Analysis Vol.25 No.1

By conducting a quantificational measurement of China-North Korea relations from1991 to 2012, it was found that the interactions between the two nations were mainly positive. Bilateral relations between China and North Korea basically remained on a good and friendly level. However, there were several distinct fluctuations. Moreover, these fluctuations happened suddenly, and their frequency showed a rising trend. The development of China-North Korea relations requires expanding the bases of bilateral cooperation and enhancing the stability thereof. China should apply the necessary means of deterrence and active preventive measures in both the political and security areas, as well as discuss and coordinate with other relevant parties ways in which to create as soon as possible suitable mechanisms to handle any events unexpectedly arising on the Korean peninsula.

Research on Problems of the Loss of Distributed Power Grid Switch and Heat Dissipation

Rui Guo,Liaoyi Ning,Jinyuan Liu 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.9

At present, the technology of the distributed power grid gradually become mature. The focus of the study is from controlling power quality to reducing the loss of power grid, improving the network efficiency and reducing the cost. In the link of distributed generation grid connected power generation, the loss of the switching device is an important factor affecting the efficiency of grid connection. This paper puts forward a systematic solution to this problem. Firstly, as for topology structure of grid connected controller, aiming at the research on NPC, a traditional topology which is energy-saving and low loss, we present an improved NPC topology with a more continuous flow state. At the same time for this topology, the corresponding control strategies are designed in this paper. It makes the switching device of the grid connected controller have more freedom of switch and make the system can achieve the precise control of the switch tube ,which can achieve the balance of system device lose heat so as to solve the problem of local high temperature from inverter. The system is verified by grid connected test, the power adjustable PWM strategy can be used to achieve different working states without affecting the output current of the system. Through the comparison between light and heat sensors finds that the topology and control strategy proposed in this paper are successfully completed by the new hardware topology and control strategy to achieve the loss balance of the system switching devices.

Complex Vector Analysis and Suppression of Parallel Vibration of Distributed Power Grid Connected Converter

Rui Guo,Cunxu Wang,Shu Liu,Xin Guan,Wei Gao,Shuaijie Wang,Chuan Chen 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.10

With the continuous expansion of the scale of distributed power generation,multi grid connected converters often prone to oscillation problems when parallel operation.In this paper,we study the equivalent circuit of parallel connection of multi grid connected converters , system response characteristics of voltage source and in-depth analysis of the causes of the parallel oscillation of the converters.This paper analyzes converter’s parallel complex vector model by complex vector and comes to a conclusion that power grid voltage feed-forward will produce strong coupling between converter so that cause oscillation parallel converters. In view of the above problems and the flow of the converter starting or the voltage fluctuation of the grid, we design a low feed forward method, that is to make the fundamental and the main sub components of the grid voltage forward without delay and for the relative high frequency components, the filter technology is used to attenuate, so as to achieve the maximum elimination of the feed-forward coupling between the converter, to prevent the occurrence of system oscillation. In order to verify the use of this paper, the theory of the parallel converter is applied in the field of MW level wind field. The experimental results prove the correctness of the theory.

Impossible Differential Cryptanalysis on Lai-Massey Scheme

Rui Guo,Chenhui Jin 한국전자통신연구원 2014 ETRI Journal Vol.36 No.6

The Lai-Massey scheme, proposed by Vaudenay, is amodified structure in the International Data EncryptionAlgorithm cipher. A family of block ciphers, namedFOX, were built on the Lai-Massey scheme. Impossibledifferential cryptanalysis is a powerful technique used torecover the secret key of block ciphers. This paper studiesthe impossible differential cryptanalysis of the Lai-Masseyscheme with affine orthomorphism for the first time. Firstly, we prove that there always exist 4-roundimpossible differentials of a Lai-Massey cipher having abijective F-function. Such 4-round impossible differentialscan be used to help find 4-round impossible differentials ofFOX64 and FOX128. Moreover, we give some sufficientconditions to characterize the existence of 5- , 6- , and 7-round impossible differentials of Lai-Massey ciphershaving a substitution-permutation (SP) F-function, andwe observe that if Lai-Massey ciphers having an SP Ffunctionuse the same diffusion layer and orthomorphismas a FOX64, then there are indeed 5- and 6-roundimpossible differentials. These results indicate that boththe diffusion layer and orthomorphism should be chosencarefully so as to make the Lai-Massey cipher secureagainst impossible differential cryptanalysis.