Han F.,Harbin Institute of Technology |
Huang D.,Heilongjiang Institute of Science and Technology
Journal of Convergence Information Technology | Year: 2012
A theoretical framework model that researches the interrelationship of organizational innovation, organizational performance and dynamic core competence of enterprise (DCCE) is proposed on the foundation of the analysis of measure dimensions which include four oriented organizational innovations and the four sub-core capabilities of DCCE and the three levels of variables of performance. By using survey questionnaire and in-depth interviews in 45 high-tech enterprises, empirical study is carried on applying structural equation modeling (SEM) to analyze the influencing path and the fit degrees. The results show that organizational innovation and organizational performance have significant, direct, and positive impacts. Some managerial implications are proposed about adopting the relationship to promote the successful implementation of innovation for the enterprise.
Chen T.,Harbin University of Science and Technology |
Li S.,Heilongjiang Institute of Science and Technology |
Sun H.,Harbin University of Science and Technology
Sensors | Year: 2012
Metamaterials are artificial media structured on a size scale smaller than wavelength of external stimuli, and they can exhibit a strong localization and enhancement of fields, which may provide novel tools to significantly enhance the sensitivity and resolution of sensors, and open new degrees of freedom in sensing design aspect. This paper mainly presents the recent progress concerning metamaterials-based sensing, and detailedly reviews the principle, detecting process and sensitivity of three distinct types of sensors based on metamaterials, as well as their challenges and prospects. Moreover, the design guidelines for each sensor and its performance are compared and summarized. © 2012 by the authors.
Wang X.-D.,Heilongjiang Institute of Science and Technology
Meitan Xuebao/Journal of the China Coal Society | Year: 2010
Aimed at attenuating the harmonics caused by high power DC drive system, proposed a new PWM topology of converters, that is, work styles of the hybrid energy storage in DC side and series resonant to form the new type of parallel active filters with reactive and active. Introduced the PWM control strategy of the new active filter with reactive and active and a harmonic control strategy based on the Fourier transform to compensate for harmonic of the 5th, 7th, 11th, 13th in three-phase power system. The proposed control strategy was accomplished through TMS320F240 DSP. In the laboratory, experimental prototypes were constructed to carry out experimental study. The present study finds that the harmonic of the 5th, 7th, 11th, 13th in the system is subjected to better suppression, so that the THD of net-side currents decreases from 26.4% to 12.8%, with a significant reduction in total harmonic distortion rate, which verifies the effectiveness of the control strategy and its implementation.
Yanqin Z.,Heilongjiang Institute of Science and Technology
International Journal of Mining Science and Technology | Year: 2013
Based on low illumination and a large number of mixed noises contained in coal mine, denoising with one method usually cannot achieve good results, so a multi-level image denoising method based on wavelet correlation relevant inter-scale is presented. Firstly, we used directional median filter to effectively reduce impulse noise in the spatial domain, which is the main cause of noise in mine. Secondly, we used a Wiener filtration method to mainly reduce the Gaussian noise, and then finally used a multi-wavelet transform to minimize the remaining noise of low-light images in the transform domain. This multi-level image noise reduction method combines spatial and transform domain denoising to enhance benefits, and effectively reduce impulse noise and Gaussian noise in a coal mine, while retaining good detailed image characteristics of the underground for improving quality of images with mixing noise and effective low-light environment. © 2013 Published by Elsevier B.V. on behalf of China University of Mining & Technology.
Wu W.L.,Heilongjiang Institute of Science and Technology
Materials Science and Technology | Year: 2010
TiC reinforced Ti matrix composite layer was fabricated by laser cladding of Ti and TiC powder mixture on Ti-6Al-4V alloy. Dissolution precipitation mechanism was speculated to illustrate the formation of TiC dendrite in the composite layer. Microstructure evolution of the composite layer has been explained by this mechanism. The composite incorporates the advantages of external particle composites and in situ synthesised particle composites. This mechanism offers an alternative novel idea for the design of bulk composites as well as composite layers. The composite layer exhibits high hardness and excellent wear resistance. © 2010 Institute of Materials, Minerals and Mining.