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Jianguo Lyu,Binghui Ma,Han Yan,Zhendong Ji,Jinyong Ding 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.1
In order to improve the performance of a 3−level neutral point clamped (3L−NPC) grid−connected inverter with fnite control set model predictive control (FCS−MPC), this paper proposes a modifed FCS−MPC algorithm based on the rearranged control set (MFCS−MPC). By adding synthetic virtual voltage vectors to rearrange the fnite control set (FCS) of the 3L−NPC inverter, the frequency spectrum of output leg voltage becomes concentrated, which is benefted for decreasing total harmonic distortion (THD) of grid currents and makes it easier to design output flters for the grid−connected inverter. Moreover, based on switching state sequences of virtual voltage vectors, the modifed predictive model of the proposed method is established considering capacitor voltage diference. Besides, according to the location of the reference output voltage vector, a preselection step is incorporated into MFCS−MPC to narrow the control set for predictions, which avoids evaluating all candidate voltage vectors in the control set, and hence, the online computational burden is signifcantly reduced. A prototype of 3L−NPC grid−connected inverter is established to validate the proposed MFCS−MPC method and the experimental results show that this method has excellent static and dynamic performance, with a low THD for a wide range of modulation indexes.
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Bo Deng,Jinge An,Jianguo Han,Fuyu Yang,Yingjun Zhang 한국초지조사료학회 2009 한국초지조사료학회 학술대회논문집 Vol.2009 No.08
In this paper, the effect of different land-use types on soil organic carbon (SOC) and Particulate Organic Carbon(POC) was studied by analyzing the soils in the meadow and conversing land of grassland to cropland in ecotones of agriculture and animal husbandry. It is shown t㏊t, compared with meadow, rotations of P/O and P/Cwill reduce SOC in 0-30㎝ soil layers by 47.54%-65.11% and 34.16-64.26% and POC by 16.90%-24.48% and 11.94%-20.29%, respectively. And SOC in meadow is more t㏊n in conversing land of grassland to cropland (P<0.05). Conversing grassland to cropland in ecotones of agriculture and animal husbandry will decrease the contents of SOC and POC.
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Long, Xingle,Chen, Yaqiong,Du, Jianguo,Oh, Keunyeob,Han, Insoo,Yan, Jinhua Elsevier 2017 JOURNAL OF CLEANER PRODUCTION Vol.166 No.-
<P><B>Abstract</B></P> <P>This paper investigated the role of environmental innovation behavior in the economic and environmental performance of 182 Chinese firms. We established an extended theory of planned behavior (TPB) model and proposed seven hypotheses by combining TPB and environmental innovation theory. Through structure equation model, we found that attitude toward environment behavior, subjective environmental norm, perceived environment behavioral control positively impact environmental innovation intention. Environmental innovation behavior had a 0.232 larger effect on environmental performance than on economic performance. Production processes have a 0.028 greater positive influence on environmental performance than on economic performance. Enhancing environmental innovation promotes sustainable development. It is important to strengthen cleaner production processes to reduce environmental pollution. It is a significant obligation to conduct environment-related education or training for personnel within firms.</P>
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Long, Xingle,Chen, Yaqiong,Du, Jianguo,Oh, Keunyeob,Han, Insoo Elsevier 2017 Energy Policy Vol.107 No.-
<P><B>Abstract</B></P> <P>This paper analyses the impact of environmental innovation on the economic and environmental performance of Korean-owned firms in China. We establish a theoretical model and propose eight hypotheses, which combine TPB (Theory of Planned Behavior) with theories of global environmental management and environmental innovation. We analyse the determinants of environmental innovation intention. We also analyse the effects of environmental innovation behavior on economic performance and environmental performance in different provinces and of different corporate ownership. We find that environmental innovation behavior has a greater effect on environmental performance than economic performance. Innovation in production processes, in particular, positively affects environmental performance for Korean-owned firms in Jiangsu. We also find that wholly Korean-owned firms (WKOEs) are more receptive to environmental innovation than Sino-Korean joint ventures. It is important to enhance environmental innovation within Korean-owned firms in China. Environmental innovation should concentrate on improving production processes in Jiangsu.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Environmental innovation behavior has a greater effect on environmental performance than economic performance. </LI> <LI> Innovation in production processes positively affects environmental performance for Korean-owned firms in Jiangsu. </LI> <LI> Environmental innovation should concentrate on improving production processes in Jiangsu. </LI> </UL> </P>
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Yixin Ding,Zongyi Guo,Yonglin Han,Jiaqi Wang,Jianguo Guo,Zequn Liu,Jinlong Zhao 한국항공우주학회 2024 International Journal of Aeronautical and Space Sc Vol.25 No.2
This paper investigates the control direction reversal issue for the attitude control design for hypersonic reentry vehicles, and proposes a novel sliding mode control law which addresses the control direction switching and strong robustness requirement simultaneously. Firstly, the disturbance observer is introduced to estimate the unmatched uncertainties in the attitude model of hypersonic reentry vehicles, and then a periodic function-involved sliding mode control is presented and the bounded stability of the closed-loop system is guaranteed via Lyapunov stability theory. The merits of the proposed method lie in that the closed-loop system is stable even under the unknown control direction reversal, and the unmatched uncertainties can be addressed by the disturbance observer. Finally, the simulation verifies the effectiveness and superiority of the proposed control.
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Neo-Chinese Style Furniture Design Based on Semantic Analysis and Connection
Jialei Ye,Jiahao Zhang,Liqian Gao,Yang Zhou,Zi Yang Liu,Jianguo Han 한국인터넷정보학회 2022 KSII Transactions on Internet and Information Syst Vol.16 No.8
Lately, neo-Chinese style furniture has been frequently noticed by product design professionals for the big part it played in promoting traditional Chinese culture. This article is an attempt to use big data semantic analysis method to provide effective design research method for neo-Chinese furniture design. By using big data mining program TEXTOM for big data collection and analysis, the data obtained from typical websites in a set time period will be sorted and analyzed. On the basis of "neo-Chinese furniture" samples, key data will be compared, classification analysis of overall data, and horizontal analysis of typical data will be performed by the methods of word frequency analysis, connection centrality analysis, and TF-IDF analysis. And we tried to summarize according to the related views and theories of the design. The research results show that the results of data analysis are close to the relevant definitions of design. The core high-frequency vocabulary obtained under data analysis, such as popular, furniture, modern, etc., can provide a reasonable and effective focus of attention for the designs. The result obtained through the systematic sorting and summary of the data can be a reliable guidance in the direction of our design. This research attempted to introduce related big data mining semantic analysis methods into the product design industry, to supply scientific and objective data and channels for studies on design, and to provide a case on the practical application of big data analysis in the industry.
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Vagococcus zengguangii sp. nov., isolated from yak faeces
Ge Yajun,Jin Dong,Lai Xin-He,Yang Jing,Lu Shan,Huang Ying,Zheng Han,Zhang Xiaoyan,Xu Jianguo 한국미생물학회 2021 The journal of microbiology Vol.59 No.1
Two unknown Gram-stain-positive, catalase- and oxidasenegative, non-motile, and coccus-shaped bacteria, designated MN-17T and MN-09, were isolated from yaks faeces (Bos grunniens) in the Qinghai-Tibet Plateau of China. 16S rRNA gene sequence-based comparative analyses revealed that the two strains were grouped within the genus Vagococcus, displaying the highest similarity with Vagococcus xieshaowenii CGMCC 1.16436T (98.6%) and Vagococcus elongatus CCUG 51432T (96.4%). Both strains grew optimally at 37°C and pH 7.0 in the presence of 0.5% (w/v) NaCl. The complete genome of MN-17T comprises 2,085 putative genes with a total of 2,190,262 bp and an average G + C content of 36.7 mol%. The major fatty acids were C16:0 (31.2%), C14:0 (28.5%), and C18:1ω9c (13.0%); the predominant respiratory quinone was MK-7 (68.8%); the peptidoglycan type was A4α(L-Lys-DAsp); and the major polar lipid was diphosphatidylglycerol. Together, these supported the affiliation of strain MN-17T to the genus Vagococcus. In silico DNA-DNA hybridization and the average nucleotide identity values between MN-17T and all recognized species in the genus were 21.6–26.1% and 70.7–83.0%, respectively. MN-17T produced acid from D-cellobiose, D-fructose, glycerol, D-glucose, N-acetyl-glucosamine, gentiobiose, D-mannose, D-maltose, D-ribose, Dsaccharose, salicin, D-trehalose, and D-xylose. These results distinguished MN-17T and MN-09 from closely related species in Vagococcus. Thus, we propose that strains MN-17T and MN-09 represent a novel species in the genus Vagococcus, with the name Vagococcus zengguangii sp. The type strain is MN-17T (= CGMCC 1.16726T = GDMCC 1.1589T = JCM 33478T).
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Agromyces laixinhei sp. nov. isolated from bat feces in China
Cheng Yanpeng,Bai Yibo,Huang Yuyuan,Yang Jing,Lu Shan,Jin Dong,Pu Ji,Zheng Han,Li Junqin,Huang Ying,Wang Suping,Xu Jianguo 한국미생물학회 2021 The journal of microbiology Vol.59 No.5
Three rod-shaped, Gram-stain-positive, and catalase-positive, phenotypically closely related isolates (HY052T, HY050, and HY045) were obtained from fecal samples collected from bats in Guangxi province and Chongqing city of China. Circular, smooth, light-yellow colonies appeared on brain heart infusion plate after 24–48 h incubation at 28°C. The optimal pH for growth was between 6.0 and 7.5. Based on 16S rRNA, the three isolates were phylogenetically related to Agromyces terreus DS-10T, Agromyces aureus AR33T, Agromyces salentinus 20-5T, Agromyces allii UMS-62T, Agromyces lapidis CD55T, and Agromyces italicus CD1T. Moreover, based on 296 core genes, the phylogenomic tree indicated that the three isolates clustered together, closest to Agromyces cerinus VKM Ac- 1340T and Agromyces fucosus VKM Ac-1345T but separated distantly from other Agromyces species. The average nucleotide identity values between strain HY052T and other Agromyces species ranged from 79.3% to 87.9%, lower than the 95–96% threshold. Furthermore, the genome of strain HY052T contains a circular chromosome of 3,437,203 bp with G + C content of 69.0 mol%. Main fatty acids were anteiso-C15:0 and anteiso-C17:0. The polar lipids comprised diphosphatidylglycerol, phosphatidylglycerol, and unidentified glycolipids. Rhamnose, ribose, and glucose were the primary cell wall sugars. The major peptidoglycan amino acids included alanine, glutamic acid, glycine, and 2,4-diaminobutyric acid. An additional remarkable difference from other Agromyces species is that MK-12 was the sole menaquinone in strain HY052T. Based on results from the polyphasic characterizations performed in this study, our isolates are proposed to be members of a novel species in genus Agromyces, named Agromyces laixinhei. The type strain is HY052T (= CGMCC 1.17175T = JCM 33695T).
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Zhao, Guoqing,Shen, Wenfei,Jeong, Eunwook,Lee, Sang-Geul,Yu, Seung Min,Bae, Tae-Sung,Lee, Gun-Hwan,Han, Seung Zeon,Tang, Jianguo,Choi, Eun-Ae,Yun, Jungheum American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.32
<P>Improving the wetting ability of Ag on chemically heterogeneous oxides is technically important to fabricate ultrathin, continuous films that would facilitate the minimization of optical and electrical losses to develop qualified transparent Ag film electrodes in the state-of-the-art optoelectronic devices. This goal has yet to be attained, however, because conventional techniques to improve wetting of Ag based on heterogeneous metallic wetting layers are restricted by serious optical losses from wetting layers. Herein, we report on a simple and effective technique based on the partial oxidation of Ag nanoclusters in the early stages of Ag growth. This promotes the rapid evolution of the subsequently deposited pure Ag into a completely continuous layer on the ZnO substrate, as verified by experimental and numerical evidence. The improvement in the Ag wetting ability allows the development of a highly transparent, ultrathin (6 nm) Ag continuous film, exhibiting an average optical transmittance of 94% in the spectral range 400-800 nm and a sheet resistance of 12.5 Ω sq<SUP>-1</SUP>, which would be well-suited for application to an efficient front window electrode for flexible solar cell devices fabricated on polymer substrates.</P> [FIG OMISSION]</BR>
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