This paper aims to improve the generalization capability of feature extraction scheme by introducing a micro-cracks detection method based on self-learning features…
This paper aims to improve the generalization capability of feature extraction scheme by introducing a micro-cracks detection method based on self-learning features. Micro-cracks detection of multicrystalline solar cell surface based on machine vision is fast, economical, intelligent and easier for on-line detection. However, the generalization capability of feature extraction scheme adopted by existed methods is limited, which has become an obstacle for further improving the detection accuracy.
A novel micro-cracks detection method based on self-learning features and low-rank matrix recovery is proposed in this paper. First, the input image is preprocessed to suppress the noises and remove the busbars and fingers. Second, a self-learning feature extraction scheme in which the feature extraction templates are changed along with the input image is introduced. Third, the low-rank matrix recovery is applied to the decomposition of self-learning feature matrix for obtaining the preliminary detection result. Fourth, the preliminary detection result is optimized by incorporating the superpixel segmentation. Finally, the optimized result is further fine-tuned by morphological postprocessing.
Comprehensive evaluations are implemented on a data set which includes 120 testing images and corresponding human-annotated ground truth. Specifically, subjective evaluations show that the shape of detected micro-cracks is similar to the ground truth, and objective evaluations demonstrate that the proposed method has a high detection accuracy.
First, a self-learning feature extraction method which has good generalization capability is proposed. Second, the low-rank matrix recovery is combined with superpixel segmentation for locating the defective regions.
The purpose of this paper is to understand the concept of graduate work readiness (GWR) from a stakeholder perspective. The research attempts to pull together the various…
The purpose of this paper is to understand the concept of graduate work readiness (GWR) from a stakeholder perspective. The research attempts to pull together the various multidisciplinary themes from the literature into a comprehensive analysis of the relationship between graduates and the labour market, considering the international dimension of what is a global phenomenon.
The critical review is divided into four distinct sections, the first is to contextualise the concept of GWR and graduate employability taking into account recent academic discussion, particularly in the EU and ASEAN; second, to explore the different perspectives of stakeholders in the “triple helix” of universities, governments and the corporate world; third, critically to assess the arguments that educational provision is poorly aligned with labour market needs; and finally, to investigate the implications of the fourth industrial revolution for graduate jobs and skills and propose an agenda for future research.
Despite the apparent consensus between stakeholders over the central importance of graduate employability, there is considerable diversity in how each imagines GWR is best assured.
Any review is limited by the extant literature and whilst it is not uncommon that most research has been done in North America, Western Europe and Australasia, this is a serious limitation. GWR is a global concern and this review shows the need for more research that extends beyond the dominant geographical focus and its attendant paradigms. The implication is that geography is important and local research is needed to develop solutions that fit specific cultural, economic and institutional contexts.
The paper highlights the need to reconcile different stakeholder perspectives on GWR and ensure that they work together on shared agendas to improve graduate transition to the labour market. At the same time, the profound changes being brought about by the fourth industrial revolution suggest that more attention should be paid to the employability of existing employees.
This review should prove useful to both academics and practitioners because it emphasises the need to treat GWR as a concept that varies according to context and stakeholder interests, rather than a homogeneous phenomenon.