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        • KCI등재SCOPUS

          Continuous Conduction Mode Soft-Switching Boost Converter and its Application in Power Factor Correction

          Miao-miao,Cheng,Zhiguo,Liu,Yueyue,Bao,Zhongjie,Zhang 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5

          Continuous conduction mode (CCM) boost converters are commonly used in home appliances and various industries because of their simple topology and low input current ripples. However, these converters suffer from several disadvantages, such as hard switching of the active switch and reverse recovery problems of the output diode. These disadvantages increase voltage stresses across the switch and output diode and thus contribute to switching losses and electromagnetic interference. A new topology is presented in this work to improve the switching characteristics of CCM boost converters. Zero-current turn-on and zero-voltage turn-off are achieved for the active switches. The reverse-recovery current is reduced by soft turning-off the output diode. In addition, an input current sensorless control is applied to the proposed topology by pre-calculating the duty cycles of the active switches. Power factor correction is thus achieved with less effort than that required in the traditional method. Simulation and experimental results verify the soft-switching characteristics of the proposed topology and the effectiveness of the proposed input current sensorless control.

        • DO THE DIFFERENT STORE FORMATS OF THE SAME BRAND MATTER TO CHINESE SHOPPERS? A STUDY ON A JAPANESE FASHION BRAND

          Miao,Miao 글로벌지식마케팅경영학회 2018 Global Marketing Conference Vol.2018 No.07

          Despite the plethora of articles and research in marketing and retailing literatures focused on enhancing customer loyalty, the topic of how to best allocate resources to various loyalty-building efforts has always attracted interest from both academics and practitioners (Kamran-Disfani, et al., 2017). Much research has examined that satisfaction is a strong relative factor of loyalty. However, Kumar, et al. (2012) and Kamran-Disfani, et al. (2017) stressed that the satisfaction-loyalty link could depend on various moderators and mediators. And they pointed out the difference between two types of loyalty—attitudinal and behavioral, and the mediating effect of attitudinal loyalty within the satisfaction-behavioral loyalty link. Thus, there is a need for more studies empirically investigating the satisfaction-loyalty link and how satisfaction effects loyalty in different contexts. On the other hand, many companies have recently been building a greater variety of store formats and attempting to provide a superior shopping experience through their stores in order to increase the possibility of customer revisitation and customer loyalty. Also, consumers not only switch to different retailers in the same product categories but also change to different store formats for the same product purchasing (Anand and Sinha, 2009). The reasons can be considered as customers' attitudes toward stores and preference of store atmosphere and environment (Wakefield and Baker, 1998). However, few research pays attention to the issue of how, and to what extent, the different store formats have on impacting customer satisfaction and loyalty building. This is especially true of retailers having entered a new overseas market, and how its loyalty building is effected by its store format choice during its developing stages. This study adopts a conceptual model from Kamran-Disfani, et al. (2017) and aims to examine the satisfaction-loyalty link and test if attitudinal loyalty could be a mediator between satisfaction and behavioral loyalty. And if so, do store formats matter to the satisfaction-loyalty link. In short, we develop hypotheses of how store atmosphere, customer satisfaction, attitudinal loyalty, behavioral loyalty are related, and how store format moderates these relationships. In order to improve the understanding of the satisfaction-loyalty link in the context of retail internationalization, we survey a Japanese fashion company — Nice Claup who segmented the Chinese market by operating multiple retail stores, and each retail store plays a discrete role of cultivating customer loyalty. In our analysis, we compare two store formats of Nice Claup, which are the single brand specialty store and the multi-brand store (defined as ―house brand store‖ in this paper). House brand stores aim to offer novel shopping experiences by gathering several Japanese fashion brands into one large store, with each brand having their own detached areas for keeping each brand's identity separate and recognizable, but are connected to each other by an integrated store design. Both of these two types of stores are named ―Nice Claup‖, and operated by the same retailer. We choose a 388-customer survey data as our sample. All of these customers have purchased clothes at Nice Claup's stores over 5 times per year and have been given special member's card by Nice Claup in Shanghai, China. This 388-customer data obtains 180 consumers who always purchase at house brand stores, and 208 consumers who always purchase at single-brand specialty stores. Hypotheses are tested using an ordinary least squares regression model with a cross-store format comparative analysis. The results suggest that while attitudinal loyalty positively and directly influences behavioral loyalty, satisfaction indirectly drives behavioral loyalty through the mediating effects of attitudinal loyalty. This implies that we should focus on the process of building loyalty and there might be a potential stage before gaining customers' behavioral loyalty. We also find that there are some important differences between the two store formats, i.e., (1) the effect of store atmosphere (ambience cue, design cue, social cue (Kumar and Kim, 2014)) on satisfaction; (2) the moderating effect of store formats on the relationship between attitudinal loyalty and behavioral loyalty. The findings explore different perception of the two types of stores and influencing factor on building loyalty from an emerging market perspective. By extension, it also shows an application of implementing retail internationalization with adopting multiple store formats on different developing stages, and customer loyalty can be enhanced by offering store novelty in the Chinese market.

        • HABITUAL MOBILE SHOPPING BEHAVIOR: COMPARISON OF CHINESE AND VIETNAMESE CUSTOMERS

          Miao,Miao 글로벌지식마케팅경영학회 2020 Global Marketing Conference Vol.2020 No.11

          Consumers are increasingly using their smartphones for making purchases, with the other modes being traditional offline and online channels (Kim et al., 2017). In light of the growing number of smartphone users worldwide, many e-commerce companies have responded by launching mobile apps that offer more convenient and flexible shopping experiences to smartphone users (Bang et al., 2013). A number of e-commerce related studies have identified crucial differences between mobile shopping (m-shopping) and online shopping. They find that m-shopping provides greater flexibility in terms of time and place as well as multi-tasking capabilities (for instance, a mobile shopper can communicate with others and even post a picture of an item to social media asking for others' opinions and comments, all while shopping via a mobile app). These types of apps simultaneously cater to consumers' shopping and social affiliation needs (Yang et al., 2012). Current research has shown that this type of shopping has gradually become habitual or automatic (Shankar et al., 2016). This new type of e-commerce has brought about a change in the shopping behavior of customers, thereby challenging companies to develop specific strategies to attract this new breed of shoppers.

        • KCI등재SCOPUS

          Effect of Media Components and Morphology of Bacillus natto on Menaquinone-7 Synthesis in Submerged Fermentation

          Miao-miao,Luo,Lu-jing,Ren,Sheng-lan,Chen,Xiao-jun,Ji,He,Huang 한국생물공학회 2016 Biotechnology and Bioprocess Engineering Vol.21 No.6

          Vitamin K2 (menaquinone or MK) plays an important role in blood clotting, cardiovascular disease, and anti-osteoporosis. A novel bacterial strain was isolated and identified as Bacillus natto based on 16SrDNA sequencing and LC-MS analysis. The objective of this study was to improve the extraction efficiency and productivity of MK-7 from B. natto. Acid-heating method efficiently disrupted B. natto cells for MK-7 extraction. Bacillus natto had a wide range of pH (5.0 ~ 9.0) for optimal growth. Its MK-7 yield was increased when rotation speed was increased to 200 rpm. The highest MK-7 yield was obtained when glycerol and soy peptone were used in the growth media. Batch fermentation was subsequently tested in 5 L bioreactor, which gave a high productivity of MK-7 (at 0.60 mg/L/h). A positive correlation between MK-7 yield and sporulation ratio was also found. This study provides valuable information on the extraction and production of menaquinone-7 from B. natto under submerged fermentation condition.

        • KCI등재SCOPUS

          Effect of Turbulent Fluctuation on Settling Behavior of Dredged Slurry in Sheared Condition

          Miao-miao,Song,Gui-zhong,Xu,Jie,Yin,Wei-juan,Geng,Zhi-yan,Zhou,Cheng-chun,Qiu 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.4

          For the land shortage problem upon the city development in coastal areas, it is of great importance to improve the overall understanding of the settlement behavior of dredged slurry and determine the required site water storage capacity as well as the mechanical properties of the newly formed dredged slurry. This paper presents an experimental investigation on the effect of turbulent fluctuation on the settling behavior of dredged slurry in sheared condition via a self-developed testing apparatus namely double cylinder settling column. Test results showed that the settling velocity of the soil-water interface initially increased then decreased with the increasing rotation speed of the inner column. The interface would disappear and a stable suspended layer was observed when the rotation speed was greater than 20 rad/min, where water contents and grain composition were not changed over the depth. The particle content was closer to that of the original sample as the rotation speed kept increasing in the suspended layer. It was found that the stabilized flocs were gradually broken down by the turbulence effect existing in the sheared slurry. Moreover, the stabilized flocs were losing the stability gradually as the flowing velocity increased till 10 rad/min and the floc structure was broken down completely once the flowing velocity was greater than 20 rad/min.

        • SCOPUSKCI등재

          ON CONVERGENCE OF THE MODIFIED GAUSS-SEIDEL ITERATIVE METHOD FOR H-MATRIX LINEAR SYSTEM

          Miao,,Shu-Xin,Zheng,,Bing Korean Mathematical Society 2013 대한수학회논문집 Vol.28 No.3

          In 2009, Zheng and Miao [B. Zheng and S.-X. Miao, Two new modified Gauss-Seidel methods for linear system with M-matrices, J. Comput. Appl. Math. 233 (2009), 922-930] considered the modified Gauss-Seidel method for solving M-matrix linear system with the preconditioner $P_{max}$. In this paper, we consider the modified Gauss-Seidel method for solving the linear system with the generalized preconditioner $P_{max}({\alpha})$, and study its convergent properties when the coefficient matrix is an H-matrix. Numerical experiments are performed with different examples, and the numerical results verify our theoretical analysis.

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