排序方式: 共有44条查询结果,搜索用时 0 毫秒
1.
地方应用型本科院校,作为高等教育的一个重要组成部分,为加快地方人才培养步伐、促进地方经济建设和发展,起到了不可替代的作用.在学生生源逐步减少和产业结构优化调整的新形势下,地方本科院校如何扬长避短,走出一条具有自身办学特色的新路子,是摆在人们面前的一个紧迫问题.本文根据当前实际,分析了办学中遇到的实际问题及原因,提出了教学改革中的新思路和新方法. 相似文献
2.
3.
4.
Porous β-tricalcium phosphate bioceramic (PTCP) has important roles in surgical implants because of good biocompatibility. But the low compressive strength of the ceramic limits its application. The preparation of PTCP was improved with the adjustment of the constituents and the sintering-process. A new type of PTCP material with high compressive strength was made. The compositions, microstructure and properties of PTCP were analyzed by TG-DSC, XRD, TEM, SEM and so on. The result indicates that stearic acid burns sufficiently and gives out carbon dioxide and water vapor when slowly heated between 200 ℃ and 400 ℃ so that the porous structure like coral in β-TCP bioceramic is formed. Through crystallization at 470 ℃ and 570 ℃, more CaO-P2O5 glass-cement is converted into crystallite-glass, which is beneficial for improving the compressive strength of β-TCP bioceramic.PTCP can form a support action in bone imperfect section with good solubility. 相似文献
5.
6.
设计了一种以微处理器Atmegal63为核心,对人体多道生理参数进行实时采集和高速数据传输的电路,以此构成人体生理参数检测仪,为医生诊断病情提供依据。 相似文献
7.
8.
9.
冲压产品特征识别技术的研究 总被引:4,自引:0,他引:4
介绍了基于三维线框模型冲压零件的特征提取、特征推理的一些方法和原则,从零件几何模型中识别出加工特征,能提高设计评价、工艺规划、模具选择的自动化程度。针对冲压零件的形状特点,采用基于面的表达模式表示特征,利用几何推理和工艺知识相结合的方法唯一确定加工特征。 相似文献
10.
1 INTRODUCTIONTheceramicmaterialsbasedoncalcium phos phates ,havebeenstudiedsince 1980whichincludedtricalcium phosphate (β TCP )andhydroxyapatite(HA) .Thereisawiderangeofpotentialapplicationsforbonesubstitutesintheformofdenseorporousparts .LowbiodegradabilityofHAhindersbonein growthandresultsinchemicalbondingonlyatthein terfacebetweenthebonesandHAimplant.Com paredwithHA ,β TCPisgenerallyconsideredare sorbablebioceramicwith goodbiodegradation[1,2 ] .ThedissolvedCa2 andP5- canpe… 相似文献