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本文综合行为金融、公司治理和公司金融理论构建科技保险参保意愿影响因素的理论模型,并基于浙江省635家高新技术企业的问卷调查数据进行实证检验。结论表明:第一,管理层风险偏好和管理层风险认知对高新技术企业科技保险参保意愿具有显著影响:风险喜好型管理者更倾向于采取风险自担策略,抑制科技保险需求;而较高的风险认知则有助于提升企业购买科技保险的意愿。第二,良好的董事会治理有助于提升企业风险管理,独立董事占比越高,企业购买科技保险的意愿越强。第三,管理层风险认知在董事会独立性与企业参保意愿之间发挥部分中介作用,这意味着董事会治理可以通过影响管理层风险认知,间接作用于企业的风险管理决策。 相似文献
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随着信息工业的发展、网络技术的不断进步,越来越多的高等学校开始探索在素质教育原则的指导下,利用多媒体技术与网络技术作为理想的认知工具进行高校外语教学改革。如何利用多媒体发展和传播英语文化知识,培养出新时代复合人才是大学英语教学面临的重大任务。本文通过对多媒体在大学英语互动教学中意义的分析,总结出如何在英语教学中有效的利用多媒体。 相似文献
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间歇低氧运动对肥胖大鼠食欲的影响及其机制分析 总被引：1，自引：0，他引：1
探讨间歇低氧运动对营养性肥胖SD大鼠摄食的影响并分析其可能机制,为间歇低氧减肥提供理论依据。为此,通过对雄性SD大鼠饲喂高脂饲料建立营养性肥胖模型,然后进行为期4周的间歇低氧运动(运动速度为20 m/min,?(O2)前2周为15.4%,后2周为14.5%)。间歇低氧运动组进行4周间歇低氧运动刺激。结果发现:与常氧安静组相比,常氧运动组和间歇低氧运动组肥胖SD大鼠下丘脑瘦素和瘦素受体含量增加(常氧运动组P<0.05,间歇低氧运动组P<0.01),大鼠的每日摄食量减少。与常氧运动组相比,间歇低氧运动组肥胖SD大鼠下丘脑瘦素和瘦素受体含量增加(瘦素P<0.05,瘦素受体P<0.01)。结果说明:1)间歇低氧运动抑制了肥胖大鼠的食欲,减少了摄食量,减缓了大鼠体重的增加,并且间歇低氧效果比单纯运动效果好;2)间歇低氧运动抑制大鼠食欲可能与大鼠下丘脑瘦素和瘦素受体含量增加,进而抑制神经肽Y有关。 相似文献
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2007年10月,对巴塘攀蜥的生长蜕皮现象进行了观察．巴塘攀蜥的蜕皮方式为成片脱落,蜕皮时间持续8天,其中前3天为蜕皮的主要时间．蜕皮前5天至前2天不食不动,蜕皮期间的前3天食量增加,特别是蜕皮期间的前1天食量大增,并有借助于外部条件来脱掉其皮肤的行为,蜕皮后食量与蜕皮前保持一致． 相似文献
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Using a randomised cross-over design, free-living lunch intake and subjective appetite were examined in 10 children (9.8 ± 0.6 years) following high-intensity interval training (HIIT) versus a control sedentary (SED) period, within a school setting. The 22-min HIIT took place during a regular PE lesson and consisted of two rounds of 4 × 30 s sprints. Foods were offered at a regular school lunch immediately following HIIT and SED and were matched between conditions. All food was covertly weighed before and after the meal. Hunger, fullness and prospective consumption were reported immediately before and after HIIT/SED, using visual analogue scales. Heart rate was higher during HIIT than SED (159.3 ± 23.1 vs. 76.9 ± 2.2 bpm, P < 0.05). Lunch energy intake was not different (P = 0.52) following HIIT, compared to SED (2.06 ± 0.35 vs. 2.09 ± 0.29 MJ, respectively). There were no significant differences in macronutrient intake or subjective appetite (P > 0.05). Results suggest that HIIT can be implemented in a PE lesson immediately before lunch, without causing a compensatory increase in food consumption. 相似文献
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Stephen F. Burns David R. Broom Masashi Miyashita Claire Mundy 《Journal of sports sciences》2013,31(6):635-642
Abstract Ghrelin is a hormone that stimulates hunger. Intense exercise has been shown to temporarily suppress hunger after exercise. In the present study, we investigated whether post-exercise hunger suppression is mediated by reduced plasma total ghrelin concentrations. Nine men and nine women participated in the study. Their mean physical characteristics were as follows: age 24.8 (s x = 0.9) years, body mass index 22.9 (s x = 0.6) kg · m?2, maximal oxygen uptake ([Vdot]O2max) 57.7 (s x = 2.2) ml · kg?1 · min?1. The participants completed two 3-h trials (exercise and control) on separate days in a randomized balanced design after overnight fasts. The exercise trial involved a 1-h treadmill run at 73.5% of [Vdot]O2max followed by 2 h of rest. The control trial consisted of 3 h of rest. Blood samples were collected at 0, 0.5, 1, 1.5, 2, and 3 h. Total ghrelin concentrations were determined from plasma. Hunger was assessed following blood sampling using a 15-point scale. The data were analysed using repeated-measures analysis of variance. Hunger scores were lower in the exercise trial than in the control trial (trial, P = 0.009; time, P < 0.001; trial × time, P < 0.001). Plasma total ghrelin concentrations did not differ between trials. These findings indicate that treadmill running suppresses hunger but this effect is not mediated by changes in plasma total ghrelin concentration. 相似文献
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Lewis J. James Emma J. Stevenson Penny L. S. Rumbold Carl J. Hulston 《European Journal of Sport Science》2019,19(1):40-48
AbstractPost-exercise recovery is a multi-facetted process that will vary depending on the nature of the exercise, the time between exercise sessions and the goals of the exerciser. From a nutritional perspective, the main considerations are: (1) optimisation of muscle protein turnover; (2) glycogen resynthesis; (3) rehydration; (4) management of muscle soreness; (5) appropriate management of energy balance. Milk is approximately isotonic (osmolality of 280–290?mosmol/kg), and the mixture of high quality protein, carbohydrate, water and micronutrients (particularly sodium) make it uniquely suitable as a post-exercise recovery drink in many exercise scenarios. Research has shown that ingestion of milk post-exercise has the potential to beneficially impact both acute recovery and chronic training adaptation. Milk augments post-exercise muscle protein synthesis and rehydration, can contribute to post-exercise glycogen resynthesis, and attenuates post-exercise muscle soreness/function losses. For these aspects of recovery, milk is at least comparable and often out performs most commercially available recovery drinks, but is available at a fraction of the cost, making it a cheap and easy option to facilitate post-exercise recovery. Milk ingestion post-exercise has also been shown to attenuate subsequent energy intake and may lead to more favourable body composition changes with exercise training. This means that those exercising for weight management purposes might be able to beneficially influence post-exercise recovery, whilst maintaining the energy deficit created by exercise. 相似文献
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运动对机体摄食的影响 总被引：1，自引：0，他引：1
文章就运动对摄食的影响从长期有氧运动、过度训练、单次运动几个方面进行了综述.为进一步研究运动对食欲和能量摄入的影响机制提供理论基础.同时对合理安排运动与膳食减肥提供帮助. 相似文献
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谢刚 《黔南民族师范学院学报》2006,26(4):17-21
毕飞宇早期小说大张旗鼓地对历史进行了先锋色彩浓厚的演绎。毕飞宇历史叙事的动因由“家族情结”和“文革情结”两方面构成,其传达的是对历史、语言和权力三者亲缘关系的哲学体认,其根本的落脚点则在于批判欲和生命自省。 相似文献