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Li, Zhiguang,장성갑 부산대학교 중국연구소 2023 Journal of China Studies Vol.26 No.2
The Chinese MZ generation has a different consumption tendency from previous generations, which pursues efficiency and cost-effectiveness. This study aims to investigate the MZ generation in relation to VR fashion products, particularly the relationship between cognitive image, brand attitude, and purchase intention. The results show that the consumption value of the MZ generation (environmental, value, and status consciousness) had significant positive effects on cognitive image and brand attitude. Moreover, cognitive image and brand attitude positively affected purchase intention and played a significant mediating role between the consumption value of the MZ generation and the purchase intention regarding VR fashion products. Last, the consumption value of the MZ generation also significantly influenced purchase intention. The results suggest that not only environmental consciousness but also the sense of value and status should be considered in understanding the purchase behavior of the MZ-generation consumers in terms of VR fashion products. The results of this research would help fashion brands to understand the consumption value of the MZ generation as upcoming essential consumers and utilize the potential of VR digital fashion products.
Shanshan Li,Fang Ding,Xinghuan Lin,Zhiguang Li,Xuehong Ren 한국섬유공학회 2019 Fibers and polymers Vol.20 No.3
In this study, a novel organic-inorganic hybrid intumescent flame-retardant composed of nanosilica (SiO2) coveredwith polyethyleneimine (PEI) and phytic acid (PA) was coated on cotton fabrics by layer-by-layer (LbL) self-assembly toimprove flame retardancy of cotton fabrics. FT-IR, SEM and EDX were used to characterize the deposition of SiO2-PEI/PA on the surface of cotton fabrics. The LbL assembly process had a minor effect on the tensile strength of cotton fabrics. With the synergistic effect of phosphorus, nitrogen and silicon, the coated cotton fabrics with only 7 bilayers exhibited excellent flame retardancy with an LOI value of 33.7 % and a char length of 7.5 cm. TG analysis results showed that cotton/(SiO2-PEI/PA)7 had 40.7 % char residue at 600 oC, compared with 8 % char residue of uncoated cotton fabrics. Cone calorimetry test confirmed that cotton/(SiO2-PEI/PA)7 displayed a major reduction in peak of heat release rate (pHRR) of 75 % and total heat release (THR) of 52 %.
Jiangrong Li,Zhiguang Feng,Changzhu Zhang,Juan Shi 제어·로봇·시스템학회 2023 International Journal of Control, Automation, and Vol.21 No.3
In this paper, the problem of dissipativity filtering for discrete-time nonlinear singular systems with distributed delays is addressed. An interval type-2 fuzzy model is employed to represent the nonlinear singular systems of which the parameter uncertainties are captured by interval type-2 membership functions characterized by lower and upper membership functions. Based on event-triggering scheme, an interval type-2 filter is proposed. By adopting the idea of input delay method, the filtering error systems is reformulated as a new event-triggering interval type-2 fuzzy singular systems with mixed time-delays. By using an improved reciprocally convex combination approach and some new techniques on matrix convexification to bound the forward difference of the double and the triple summation terms in the Lyapunov function, two less conservatism conditions have been derived. The event-triggered dissipative filter gains and the event-triggering parameters are obtained to determine the filter error singular systems admissible and dissipative. A numerical example is given to illustrate the effectiveness of this proposed method.
Shaoheng Li,Ziji Bai,Feiyang Rong,Jiayin Huang,Lipan Zhou,Guodong Feng,Zhiguang Song 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
Palladium-catalyzed coupling reactions have become effective tools for forming new carbon–carbonbonds. In this work, a novel fluorescence active benzotriazole-coumarin derivative, (E)-N’-((1H-benzo[d][1,2,3]triazol-6-yl)methylene)-7-(diethylamino)-2-ox o-2H-chromene-3-carbohydrazide (BTANC),was synthesized as ligand in Pd(II) cation coordination. It is shown that BTANC has a strong fluorescentemission at 483 nm and Pd(II) can effectively quench the fluorescence of BTANC and BTANC shows excellentsensitivity and selectivity towards Pd (II) ions. Otherwise, the BTANC-Pd(II) complex was also testedin the Sonogashira coupling reaction of phenylacetylene and aryl halides. The desired product wasobtained with high yield (up to 99%) under the optimized reaction conditions. More to that, Low fluorescenceemission was observed during the Pd-catalyzed reaction process and the fluorescent emission ofBTANC was recovered at the end of the Pd-catalyzed reaction because the oxidative addition of the arylhalide towards Pd (0) was shut down at the end of the Pd-catalyzed reaction. This fluorescence propertiesof BTANC indicates the feasibility of using fluorescence signal as a potential tool to monitor the completionof the Sonogashira coupling reaction.
A Stealthy Attack Against Tor Guard Selection
Quangang Li,Peipeng Liu,Zhiguang Qin 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.11
Tor is a popular low-latency anonymous communication system which could provide anonymity and anti-censorship. Based on previous researches on de- anonymization of Tor, this paper proposes a novel approach to attack users’ guard selection which can pose great threat against Tor users' anonymity. Under the current design of Tor, once entry guards are compromised, the probability that an attacker observes both ends of a Tor circuit will be highly improved. Actual and simulated experiments both show that an attacker (e.g., a local or national government which have the power to monitor a Tor user’s internet connection) can successfully compromise a specific Tor user’s entry guard in about 30 minutes, and this can further help de-anonymize the user’s anonymous communication.
Conditional Mutual Information-Based Feature Selection Analyzing for Synergy and Redundancy
Hongrong Cheng,Zhiguang Qin,Chaosheng Feng,Yong Wang,Fagen Li 한국전자통신연구원 2011 ETRI Journal Vol.33 No.2
Battiti’s mutual information feature selector (MIFS) and its variant algorithms are used for many classification applications. Since they ignore feature synergy, MIFS and its variants may cause a big bias when features are combined to cooperate together. Besides, MIFS and its variants estimate feature redundancy regardless of the corresponding classification task. In this paper, we propose an automated greedy feature selection algorithm called conditional mutual information-based feature selection (CMIFS). Based on the link between interaction information and conditional mutual information, CMIFS takes account of both redundancy and synergy interactions of features and identifies discriminative features. In addition, CMIFS combines feature redundancy evaluation with classification tasks. It can decrease the probability of mistaking important features as redundant features in searching process. The experimental results show that CMIFS can achieve higher best-classification-accuracy than MIFS and its variants, with the same or less (nearly 50%) number of features.
Seismic Slope Stability Evaluation Considering Rock Mass Disturbance Varying in the Slope
An-Jui Li,Zhiguang Qian,Jing-Cai Jiang,Andrei Lyamin 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.3
Seismic effect is one of the most commonly considered factors in rock slope safety design. This study adopts the finite element lower bound limit analysis method to study the seismic stability of disturbed rock slopes considering inhomogeneity caused by rock mass disturbance. Moreover, this research investigates different earthquake magnitudes by considering various seismic coefficients. Results are presented as seismic rock slope stability charts. In addition, the recommended blasting damage zones are also investigated in this study. Results show the chart solutions can provide a reasonable tool for the preliminary evaluations of the seismic safety factors for rock slope stability. The case studies demonstrate that a safe design can be done if the earthquake effects are considered reasonably. Moreover, consideration of varying rock mass disturbance in the slope is helpful to capture the failure mechanism more realistically when compared to the slope case without varying rock mass disturbance. For comparison purposes, the conventional limit equilibrium analysis and the equivalent Mohr-Coulomb parameters are used to perform analyses of the rock slope stability.