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971.
Bray Steven R.; Brawley Lawrence R.; Millen Jennifer A. 《Canadian Metallurgical Quarterly》2006,51(3):224
Objective: To examine cardiac rehabilitation program (CRP) participants' beliefs about their interventionists (proxy efficacy and reliance), self-efficacy, and exercise behavior during transition to home-based exercise. Participants and Design: Participants were 44 (16 women and 28 men) CRP outpatients (Mage = 59.43 ± 13.53 years). The design was prospective, with proxy efficacy and reliance as well as self-efficacy being used to predict two outcomes: self-regulatory self-efficacy and home-based exercise. Results: After self-regulatory efficacy reported earlier in the program was controlled for, proxy reliance predicted later program self-regulatory efficacy for home-based exercise (adjusted R2 = .10, p = .02). Proxy efficacy for self-regulation predicted home-based exercise frequency (adjusted R2 = .18, p = .01). Greater proxy efficacy for self-regulation was associated with higher exercise frequency. Conclusion: CRP participants' beliefs in the capabilities of their exercise consultants to help them develop self-regulatory skills play a role in how much exercise they do after supervised rehabilitation. Yet, individuals who strongly rely on their interventionists to assist them in exercising report weaker self-efficacy for exercising on their own. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
972.
Fei Gao Ram Devanathan Takuji Oda William J. Weber 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》2006,250(1-2):50-53
Partial-charged potentials for GaN are systematically developed that describe a wide range of structural properties, where the reference data for fitting the potential parameters are taken from ab initial calculations or experiments. The present potential model provides a good fit to different structural geometries and high pressure phases of GaN. The high-pressure transition from wurtzite to rock-salt structure is correctly predicted yielding the phase transition pressure of about 55 GPa, and the calculated volume change at the transition is in good agreement with experimental data. The results are compared with those obtained by ab initio simulations. 相似文献
973.
为了提取较为精细的图像信息,引入了多尺度2维小波分析织物的表面折皱。织物图像首先经过高斯滤波,再利用小波变换分解并从中提取高频信息,然后结合4种表征织物折皱的特征参数,计算不同折皱等级模板的特征值,通过分析特征值与折皱等级的相关系数,表明这4种特征参数可以作为模式识别的输入量;最后采用Kohonen自组织神经网络客观评定织物的折皱等级,自组织神经网络将不同等级的织物折皱模板进行分类,并以此为依据,确定26种不同织物类型的折皱等级。为了定量描述评定结果,通过计算客观评定与主观评定结果的相关系数,验证该方法的可行性。 相似文献
974.
通过对三级配混凝土轴向拉伸应力-变形全曲线的试验研究,提出了可以推广应用于全级配混凝土相应试验研究的加载装置和加荷方式. 相似文献
975.
976.
Duetotheirhighstrength,modulusandfracture toughnessaswellasgoodadhesionandthermalre sistance[1],epoxyresinsasmatricesarewidelyused inaeronautics,astronautics,transportation,sports andotherindustry.Standardepoxyresinsareusually basedonDGEBA(diglycidyletherofbisphenolA),whichneedsactivehydrogenorotheractivegroupsto opentwoepoxyrings.Four functionalepoxylike TGMDA(tetraglycidylmethylenedianiline)isoften usedforhigh performanceepoxymatrixcomposites becauseofitsrelativelyhighercross linkingdens… 相似文献
977.
978.
计算了在Er3+/Yb3+共掺的硅酸盐、锗酸盐、磷酸盐和氟化物这四种玻璃基质中施主离子归一化荧光线形函数与受主离子归一化吸收线形函数的重叠积分,交叉弛豫几率.通过求解能级跃迁速率方程,得出4S3/2能级的相对布居数.定义了上转换发光效率可以用自发辐射跃迁几率A61和4S3/2能级的相对布居数之积来表征.分析了由于氟化物中4S3/2能级的无辐射跃迁几率较小而自发辐射跃迁几率较大,因此4S3/2能级有较大的相对布居数,在四种Er3+/Yb3+共掺的玻璃中,氟化物具有较好的上转换发光效率. 相似文献
979.
我国将于2008年全面推广地面数字电视,2015年关闭模拟电视。平凉同全国兄弟省、市一样,不甘落后,积极努力创造条件,争取早日过渡加速发展,为尽早加入广播电视数字化行列构建平台。 相似文献
980.
Kinetics of Glass Transition and Crystallization in Carbon Nanotube Reinforced Mg-Cu-Gd Bulk Metallic Glass 总被引:1,自引:1,他引:1
Mg65Cu25Gd10 bulk metallic glass and its carbon nanotube reinforced composite were prepared. Differential scanning calorimeter (DSC) was used to investigate the kinetics of glass transition and crystallization processes. The influence of CNTs addition to the glass matrix on the glass transition and crystallization kinetics was studied. It is shown that the kinetic effect on glass transition and crystallization are preserved for both the monothetic glass and its glass composite. Adding CNTs in to the glass matrix reduces the influence of the heating rate on the crystallization process. In addition, the CNTs increase the energetic barrier for the glass transition. This results in the decrease of GFA. The mechanism of the GFA decrease was also discussed. 相似文献