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The single-channel control micro energy pulse source whose switch element is MOSFET has inherent drawback. There exists an uncertain gap voltage during the pulse interval, which prolongs the discharge time and decreases the surface accuracy seriously. Moreover it drives up the average voltage and results in the misoperation of the control unit. Based on the analysis of the waveshape collected in machining, a dual channel MOSFET micro energy pulse power source was designed to make the gap voltage fall down to zero in order to eliminate the uncertain gap voltage. According to the switch characteristics of the MOSFET, reasonable circuit parameters were used, and the theoretical waveshape was calculated. From the waveshape picked during experiment, it shows that the practical waveshape and the theoretical waveshape areanastomotic, and the pulse width can be contracted to sub microsecond. By means of comparison experiment, it shows that the surface texture is improved remarkably, and the course of machining becomes trouble free machining. And the dimension accuracy and surface accuracy of the workpiece increase dramatically. [ABSTRACT FROM AUTHOR]

Solitary fibrous tumor is often considered to be a mesenchymal tumor. We reported a case of atypical SFT of the buccal mucosa in a 56-year-old male patient. We found hypercellularity, nuclear atypia, increased number of mitotic figures(more than 4 per 10 high-power fields) microscopically. A long-term follow-up is necessary after complete excision. [ABSTRACT FROM AUTHOR]

This artical introduces PTT elastic woven wool fabric development as an example, optimization of process parameters in the dyeing, spinning, weaving and finishing options, pilling and elastic recovery performance and other physical indicators of control, according to design requirements of the production and taking the performance requirements of the various aspects of fiber properties. It analyzed and discussed the design requirements, the introduction of factory production of the actual situation, the system design and development process of such products, process of material selection, process design ideas, production control requirements, and how to meet the finished physical means to take the technical control measure. [ABSTRACT FROM AUTHOR]

PURPOSE: To investigate the clinical and pathological diagnosis of oral candidiasis and reduce misdiagnosis. METHODS: The medical records of 8 patients with oral candidiasis were reviewed retrospectively, HE and PAS staining of histopathology were applied to study the specimens. RESULTS: It was found that oral candidiasis were identified by pathological diagnosis, but weren't considered clinically. Minor abscesses were all detected in the epithelium of conventional histopathologic sections, the hyphae were shown by PAS staining invading the epithelium. CONCLUSIONS: The results suggest that candidal infections should be considered, if there are hyperplastic or ulcerative lesions which last for long time; when minor abscesses are detected in the epithelium by histopathologic examination, oral candidiasis should be highly suspected, and be confirmed by PAS staining. [ABSTRACT FROM AUTHOR]