Using free bending method,the residual stress of the Ti(CN)coating on alloy Nb-752 was measured to be 2-3 GPa of which the thermal stress cmounts to 10—20%.An analysis on coating/substrate interface stress state show...Using free bending method,the residual stress of the Ti(CN)coating on alloy Nb-752 was measured to be 2-3 GPa of which the thermal stress cmounts to 10—20%.An analysis on coating/substrate interface stress state shows that the share stress at it is about O.1—0.2 GPa.The demage mode of the coating under external loading was proposed in terms of the amount and the direction of loading.展开更多
Rupture and tensile properties of K17 before and after thermal exposure in vacuum,air and hot corrosion environments have been investigated.The results show that vacuum exposure es- sentially does not affect the ruptu...Rupture and tensile properties of K17 before and after thermal exposure in vacuum,air and hot corrosion environments have been investigated.The results show that vacuum exposure es- sentially does not affect the rupture lives but it results in the decrease of high temperature ten- sile strength and increases of rupture and high temperature tensile ductilities;air or hot corro- sion environmental exposure results in the degradation of alloy:severely reduce the rupture and high temperature tensile properties,hot corrosion environmental exposure being more harmful.The former causes grain boundary oxidation and depletion of Cr,and the later makes the sulphurization at grain boundaries.This results in the concentration of S and de- pletion of Cr at grain boundaries and,consequently,weakens the grain boundaries.展开更多
【目的】探讨中医按摩法在促进早产儿脑损伤的神经发育方面是否存在优势,能否进一步的确立中医在早产儿脑损伤的早期干预中的重要地位。【方法】对纳入符合纳入标准病例82例随机分为两组,两组均在常规早期干预治疗(中药浴水疗、运动疗法...【目的】探讨中医按摩法在促进早产儿脑损伤的神经发育方面是否存在优势,能否进一步的确立中医在早产儿脑损伤的早期干预中的重要地位。【方法】对纳入符合纳入标准病例82例随机分为两组,两组均在常规早期干预治疗(中药浴水疗、运动疗法)的基础上,试验组加通督醒脑益肾健脾按摩,对照组加婴儿抚触,分别于治疗前及治疗3个月后,用粗大运动功能评定量表(Gross Motor Function Measure,GMFM)、贝利婴幼儿发育量表Ⅱ及Gesell发育商数(DQ)进行评估。【结果】治疗后试验组大运动(DQ)发育商均数及GMFM的B区总体均数高于对照组,两组差异有统计学意义(P<0.05),余下几项两组对比均无统计学意义(P>0.05);MDI及PDI治疗前后两组差异均无统计学意义(P>0.05)。【结论】通督醒脑益肾健脾按摩在改善脑损伤患儿的大运动功能,尤其在坐位方面比婴儿抚触具有疗效优势。展开更多
文摘Using free bending method,the residual stress of the Ti(CN)coating on alloy Nb-752 was measured to be 2-3 GPa of which the thermal stress cmounts to 10—20%.An analysis on coating/substrate interface stress state shows that the share stress at it is about O.1—0.2 GPa.The demage mode of the coating under external loading was proposed in terms of the amount and the direction of loading.
文摘Rupture and tensile properties of K17 before and after thermal exposure in vacuum,air and hot corrosion environments have been investigated.The results show that vacuum exposure es- sentially does not affect the rupture lives but it results in the decrease of high temperature ten- sile strength and increases of rupture and high temperature tensile ductilities;air or hot corro- sion environmental exposure results in the degradation of alloy:severely reduce the rupture and high temperature tensile properties,hot corrosion environmental exposure being more harmful.The former causes grain boundary oxidation and depletion of Cr,and the later makes the sulphurization at grain boundaries.This results in the concentration of S and de- pletion of Cr at grain boundaries and,consequently,weakens the grain boundaries.
文摘【目的】探讨中医按摩法在促进早产儿脑损伤的神经发育方面是否存在优势,能否进一步的确立中医在早产儿脑损伤的早期干预中的重要地位。【方法】对纳入符合纳入标准病例82例随机分为两组,两组均在常规早期干预治疗(中药浴水疗、运动疗法)的基础上,试验组加通督醒脑益肾健脾按摩,对照组加婴儿抚触,分别于治疗前及治疗3个月后,用粗大运动功能评定量表(Gross Motor Function Measure,GMFM)、贝利婴幼儿发育量表Ⅱ及Gesell发育商数(DQ)进行评估。【结果】治疗后试验组大运动(DQ)发育商均数及GMFM的B区总体均数高于对照组,两组差异有统计学意义(P<0.05),余下几项两组对比均无统计学意义(P>0.05);MDI及PDI治疗前后两组差异均无统计学意义(P>0.05)。【结论】通督醒脑益肾健脾按摩在改善脑损伤患儿的大运动功能,尤其在坐位方面比婴儿抚触具有疗效优势。
