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Jiwei Huang,Jie Zeng,Yufang Bai,Zhuming Cheng,Yong Wang,Qidi Zhao,Dakai Liang 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.1
An analysis method for improving the shear strength for the single-lap joints of dissimilar materials based on the cohesive zone model (CZM) is presented in this paper. The shear-lag model is established for the single-lap joint, and the stress distribution of joints is derived on the basis of this model, which is verified by simulation. The bilinear CZM is constructed to simulate the fracture process of joints, and the influence of lap length and adhesive layer thickness on the stress distribution of adhesive layers is comprehensively analyzed through simulation. Therefore, the effects of different properties of adhesive layers on the bonded structure strength are discussed with experiments. Results show that the reasonable lap length and thickness in this work are, respectively, 20-22 and 0.4-0.6 mm. The research results will serve as a guide for the parameter design, fracture prediction, and performance optimization of bonded joints.
A Study on Speech Emotion Recognition Based On Fuzzy K Nearest Neighbor
Zhu Ming,Zhou Feng,Ji Zhengbiao 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.10
In order to improve the recognition performance of the tradition KNN, we combined the contributions of each feature parameter for different emotions with the tradition KNN and proposed a Fuzzy KNN algorithm for speech emotion recognition. Four kinds of emotions’ recognition experiment has shown that the Fuzzy KNN we proposed not only keeps the tradition KNN’s advantages of fast recognition and easy realization, but also improves the recognition performance.
Case of Langerhans Cell Histiocytosis That Mimics Meningioma in CT and MRI
Zhu, Ming,Yu, Bing-Bing,Zhai, Ji-Liang,Sun, Gang The Korean Neurosurgical Society 2016 Journal of Korean neurosurgical society Vol.59 No.2
Langerhans cell histiocytosis (LCH) is a rare disorder histologically characterized by the proliferation of Langerhans cells. Here we present the case of a 13-year-old girl with LCH wherein CT and MRI results led us to an initially incorrect diagnosis of meningioma. The diagnosis was corrected to LCH based on pathology findings. An intracranial mass was found mainly in the dura mater, with thickening of the surrounding dura. It appeared to be growing downward from the calvaria, pressing on underlying brain tissue, and had infiltrated the inner skull, causing a bone defect. The lesion was calcified with the typical dural tail sign. The dural origin of the lesion was verified upon surgical dissection. There are no previous reports in the literature describing LCH of dural origin presenting in young patients with typical dural tail signs and meningioma-like imaging findings. The current case report underscores the need for thorough histological and immunocytochemical examinations in LCH differential diagnosis.