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Non-R&D-based innovation activities and performance in Chinese SMEs: the role of absorptive capacity
Yanting Guo,Gang Zheng,Fang Liu To 기술경영경제학회 2017 ASIAN JOURNAL OF TECHNOLOGY INNOVATION Vol.25 No.1
To what extent can non-R&D-based innovation contribute to innovation performance in smallandmedium-sized enterprises (SMEs)? To answer this question, this study investigates themoderating role of absorptive capacity in the relationships between three non-R&D-basedinnovation activities and firms’ innovation performance, namely ‘technology adoption,’‘imitation and minor modification,’ and ‘innovative marketing.’ Using data on 329 Chinesemanufacturing SMEs, we find that the absorptive capacity of SMEs positively moderates therelationship between innovative marketing and innovation performance. However, theabsorptive capacity of SMEs negatively moderates the relationship between imitation andminor modification and their innovation performance. These findings contribute tounderstanding the effects of non-R&D-based innovation activities, and the role of SMEs’absorptive capacity in a non-R&D context.
Dan Sun,Jian Gang Yang,Rui Guo,Wan Fu Zhang,Yanting Ai 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.6
Static and dynamic characteristics of labyrinth seals are important in the prediction of the stability of turbomachinery. The paper presentsan effective numerical method to predict the static and dynamic performance characteristics of seals at off-center conditions withdifferent rotor whirling frequency. Modifications are introduced for the traditional turbulent bulk flow model to consider the circumferentiallyvarying flow. A trigonometric series expansion method is used to approximate parameters such as pressure and velocity in sealscavity. Numerical simulations show that 8-10 series terms with 5-10 iterations are enough for the solution of this set of nonlinear equations. The resulting nonlinear algebraic equations can be solved rapidly. The analytical results are verified by comparison with the simulatedCFD results. Parametric investigations showing the influence of eccentricity and whirling frequency on seals dynamics are alsopresented. The results show that the trigonometric series expansion based method gives an effective prediction of the static and dynamiccharacteristics of the eccentric seals.