对安徽电子信息职业技术学院理工新生近几年最大吸氧量和体形变化趋势的探讨     

石成银  石承勇 《安徽体育科技》2004,25(3):57-59

对1997～2003年3105名男女新生的最大吸氧量进行直接测定.结果:男女新生的最大吸氧量呈逐年下降趋势,男女生分别降了(0.3士0.09)L/min和(0.21士0.07)L/min;体形有逐年瘦长的趋势;经统计处理均具有显著性差异.建议学生在中学阶段就应加强体育锻练,增强体质,改善营养,进一步提高高校体育教学质量.  相似文献   

师徒论--传统武术的一个文化现象诠释   总被引：29，自引：0，他引：29  

周伟良 《北京体育大学学报》2004,27(5):583-588

择徒拜师是传统武术最基本的传承方式,至今在民间习武群体中被衍传着.传统武术师徒传承分有入室弟子和一般弟子两种类型,只有通过正式的拜师仪式后,才算形成了严格意义上的师徒关系.这种师徒传承从历史的深处走来,但并非属于"过去式",需要的是在新的历史条件下对它进行理性的甄别取舍.  相似文献   

平稳正态过程反正弦定理在信号谱估计中的应用     

戴聪 《青岛大学师范学院学报》1997,(2)

本文利用平稳过程反正弦定理估计了信号的相关西数和话密度，实例计算表明本文所述方法与实测结果相当一致。  相似文献   

实轴增量式光电编码器测量电路的设计   总被引：1，自引：0，他引：1  

李劲松 《实验室研究与探索》2007,26(2):12-15

介绍了如何设计增量式光电编码器的输出信号处理电路,并从该电路设计的四个方面着手,较为详细地阐述了电路组成的构思、设计及实现过程。  相似文献   

玉米淀粉接枝高吸水性树脂的合成研究   总被引：1，自引：0，他引：1  

李雅丽  刘娟 《渭南师范学院学报》2003,18(5):34-35

对影响淀粉—丙烯酸接枝共聚反应的引发剂用量、淀粉／单体比例、聚合温度和聚合时间等因素进行了实验考察，确定了合成玉米淀粉接枝高吸水性树脂的最佳工艺条件。合成了吸水率为400g．g^-1～600g．g^-1的高吸水性树脂．为其工业化生产提供了技术参数。  相似文献   

Light-induced cracking and abrasion of inkjet prints: Damage and mitigation     

Andrea Venosa  Daniel Burge  Eugene Salesin 《文物保护研究》2016,61(1):94-100

This study is part of a larger research project at the Image Permanence Institute dedicated to digital print preservation issues – the Digital Print Preservation Portal (DP3). Previous DP3 studies determined that certain digital print types are prone to cracking and/or abrasion, and that factors such as low relative humidity, pollutants, and light increase the brittleness of the ink-receiving layer of some inkjet papers. The purpose of this investigation was to explore if light also increases the propensity of inkjet prints to abrade, and to examine the potential of framing glazings to mitigate light-induced physical damage (cracking and abrasion) by attenuating some portion of the UV spectrum. Inkjet papers and prints were subjected to xenon lighting (to simulate daylight through window glass) without glazing, or in sealed framing packages with plain framing glass (soda-lime) or UV filtering glass. Before and after light exposure, brittleness, and abrasion resistance were evaluated independently using two tests: ISO 18907 (Imaging materials – Photographic films and papers – Wedge test for brittleness) and a rub test utilizing a Sutherland® Rub Tester. In this study, exposure to light increased the cracking and/or abrasion tendency of some specimens. The use of UV filtering glass reduced this light-induced propensity in all cases. Plain glass protected all samples from at least one of these two types of surface damage, but was less effective than UV glass. Light-induced brittleness and sensitivity to abrasion were mostly, though not exclusively, caused by UV radiation. It was also seen that some prints may become brittle and/or prone to abrasion in the absence of image fade. Budgeting the amount of light these objects can be exposed to, protecting them from UV radiation, and handling prints with caution especially after exhibition, is essential in order to limit physical damage.  相似文献   

论钙对人体健康的影响及合理补钙     

赵淑英 《沧州师专学报》2003,19(2):76-77

钙在人体中起着重要的生理调节功能，它几乎参与了人体的所有代谢过程，体内缺钙会影响健康，甚至引起疾病，而如何补钙又是很多人所未知的，所以出现了很多盲目补钙的现象。应全面认识缺钙的原因及危害，并了解如何合理而经济的补钙，把握补钙的正确途径。  相似文献   

火焰原子吸收光谱法测定废水中不同价态铬的含量   总被引：1，自引：0，他引：1  

李淑新  许明远  马淑珍  曹继福 《唐山师范学院学报》2002,24(2):33-35

建立了火焰原子吸收光谱法测定不同价态铬含量的方法。该方法的检出限为0.029mg·L-1;相对标准偏差为0.54%;平均加标回收率为99.3%;利用此分析方法测定了废水中不同价态铬的含量,结果令人满意。  相似文献   

国际关系著作的翻译特点与策略     

魏光启 《阜阳师范学院学报(社会科学版)》2006,(1):73-75

阐明英语翻译的基本准则和国际关系原著的特点,分析国际关系翻译国内化过程中出现的诸多制约因素,可以拓展人们学习和研究国际关系的视野;借鉴吸收其积极的理论养料和研究方法,对我们立足实际、从事研究意义重大。  相似文献   

Infrared Absorption Spectra of Serpentine Cat＇s Eye from Sichuan Province of China     

LU Bao - qi 《上海大学学报(英文版)》2005,9(4):365-368

Infrared （IR） absorption spectra and X-ray powder diffraction （XRD） patterrns of sexpenfine cat＇s eye from Sichuan Province have been investigated, and infrared absorption bands of the serpentine have been assigned in this paper. The results indicate that the bands near 3 600 - 3 700 cm^-1 belong to the stretching absorption band VOH, the bands in 948 - 1 100 cm^-1 axe assigned to the stretching vibraling band Usvo, and the bands at 600 570 and 440 cm^-1 respectively belong to the bending vibration band VOH, δMg-O and δSi-O. The serpentine cat＇ s eye includes two types： chrysotile and antigorite. Chrysotile has a sharp and intensive band at 3 688 cm^-1 and a weak band at 3 643 cm^-1 , while antigorite has only one intensive band in the region. At vibration band VSi-O, chrysotile and antigorite have a similar feature at 1 071 cm^-1, but the band at 980 cm^-1 in anfigorite has been split into two bands in chrysotile - a strong one at 1 027 cm^-1 and a weak one at 949 cm^-1. In addition, antigorite has a characteristic bending vibrating band δMg-O at 570 cm^-1. Based on the analysis of the feature of crystal structure, their IR differences axe well explained.  相似文献