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关于汽车儿童座椅使用问题初探 总被引:1,自引:0,他引:1
通过分析目前国内汽车儿童座椅的使用情况,指出汽车儿童座椅在使用中存在的一系列问题,并针对这些问题,提出相应的解决措施,对保障儿童乘客安全具有积极意义。 相似文献
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本文针对富康轿车进气阀座进口的三个成型锥面精铰复合刀寿命低现象 ,对切削图形不合理、切削力的影响因素和振动的起因等方面进行了分析和研究。 相似文献
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顾红新 《国防交通工程与技术》2011,9(3):74-76
在我国高速铁路实际工程中大量采用了900 t预制箱梁,为保证行车安全及结构耐久性,对高速铁路预制箱梁工程质量要求很高.结合预制过程中支座处混凝土易出现空洞的实际情况,分析了支座处出现空洞的原因主要与构造及施工工艺有关,对此采用改性环氧树脂灌缝胶作为填充材料压浆处理,并提出了预防支座处混凝土空洞的具体措施.实践表明只要加... 相似文献
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本文通过对发动机工作时,气缸盖总成中的气门座圈严重磨损的原因进行分析后,对其材料和材料热处理要求提出改进方案,并经过整机试验验证,选择了适合本机型发动机使用的气门座圈材料及其热处理要求。 相似文献
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The objective of this study was to study whiplash injury outcome in front-seat occupants in rear-end impacts using double paired comparison technique. The combination of gender, seated position, and outcome was analyzed. Folksam, a Swedish insurance company, has a database of whiplash injuries. A questionnaire was used to collect study data. The response rate was 81%. The inclusion criteria included medical impairment one year after the impact, as judged by medical specialists. The study included rear-end impacts between 1990 and 1999 that resulted in at least one permanent neck injury impairment; in total, 430 impacts with 860 occupants and 444 impairments. Of those suffering impairment, 302 were female and 142 male; 235 were seated in the driver's seat and 209 in the front passenger seat. Relative risk estimates for impairing whiplash injury, by gender and seated position:
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- Driver male (DM)/passenger female (PF) relative risk = 0.5 n = 218 相似文献