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Using ANSYS finite element analysis software simulated and analyzed the integration shear weighing plate, found the reasonable areas of pasting strain gauge based on the laws of the beam's bending deformation shear stress, researched for offset loading measurement.

The objective of this study was to retrospectively review the surgical results following gross total resection and partial resection with or without radiotherapy for craniopharyngiomas and analyze the related factors of surgical results.From 1994 to 2009, 214 patients underwent 219 procedures for craniopharyngiomas. We retrospectively reviewed the pre- and postoperative data of patients, reported the perioperative and long-term surgical results and analyzed the influencing factors and the relationship between hypothalamic involvement and postoperative quality of life.Gross total resection was achieved in 154 procedures (70.3%). Perioperative mortality was 5%. Perioperative hyperpyrexia was the most significant risk factor for perioperative mortality. A total of 151 patients were followed from 6 months to 190 months. There were significant differences in recurrence rate and overall survival between gross total resection and limited resection (P0.05). There was significant difference in recurrence rate between limited resection and limited resection with radiotherapy (P0.01), but it did not reach statistical difference between gross total resection and gross total resection with radiotherapy. The factors strongly influencing overall survival include old patients, partial resection and recurrent tumors. The preoperative hypothalamic involvement negatively correlates with the postoperative quality of life in patients with craniopharyngiomas.The preoperative CT/MR imaging provides clues of the relationship between tumor and surrounding structures. Gross total resection should be achieved in the treatment of craniopharyngiomas on the condition that hypothalamus is preserved. The patients who undergo limited resection should receive conventional radiotherapy or gamma knife surgery.

Gravity center position is one important index to evaluate the stability of vehicles. A high precision gravity center measure system is proposed in this paper, which can be used in weight and gravity center measuring for large heavy vehicles. Based on a static gravity measuring principle with three measuring points, a hydraulic driven 2-DOF motion platform is developed. By means of a degree-of-freedom control, the platform can realize accurate positioning to construct two intersected planes and work out the three-dimensional coordinates of the vehicle gravity center. Experiments demonstrate that the system's measurement error in weight is less than 0.3%, in Gravity center position measurement is less than 3mm in X and Y direction, and in Z direction is no greater than 5mm.