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Open access

Min Huang, Weiyan Zhao, Qingguo Wang, Min Zhang and Qibing Zhu


Moisture content uniformity is one of critical parameters to evaluate the quality of dried products and the drying technique. The potential of the hyperspectral imaging technique for evaluating the moisture content uniformity of maize kernels during the drying process was investigated. Predicting models were established using the partial least squares regression method. Two methods, using the prediction value of moisture content to calculate the uniformity (indirect) and predicting the moisture content uniformity directly, were investigated. Better prediction results were achieved using the direct method (with correlation coefficients RP = 0.848 and root-mean-square error of prediction RMSEP = 2.73) than the indirect method (RP = 0.521 and RMSEP = 10.96). The hyperspectral imaging technique showed significant potential in evaluating moisture content uniformity of maize kernels during the drying process.

Open access

Yangchun Xie, Xuefeng Han, Xu Zhou, Miaomiao Wang, Qingguo Zhang and Tun Liu


Background: Repair of facial defects is a unique challenge because it is critical that donor tissues match the tissues in the affected region and provide good functional as well as aesthetic outcomes.

Objective: Summarize the outcomes of the use of expanded forehead flaps to repair extensive facial defects in 13 patients.

Methods: Axial expanded forehead flaps pedicled on the superficial temporal vessels and supraorbital and supratrochlear neurovascular bundles were used to repair defects of the nose, eyelids, and mouth. Seven cases involved damage to the nose and lip and six cases involved the forehead and nose. Among the latter six cases, three had skin surface tumors involving the forehead together with the upper eyelid and the nose, in which one was pigmented nevus, one was neurofibroma, and one was hemangioma.

Results: A total of 34 flaps, ranging in size from 2.5-4 cm to 12-9 cm, were used to repair facial defects in the 13 patients (five males, eight females; median age, 32 years). There were no surgical or postoperative complications, and all flaps survived. In all cases, cosmetic and functional outcomes were considered satisfactory.

Conclusion: The expanded forehead flap provides a large amount of tissue with color and texture similar to that of facial structures, and avoids significant donor sight scars. In addition, the extensive blood supply of the forehead helps to ensure flap survival. Expanded forehead flaps are useful for the repair of large facial defects.