Drivers need to be encouraged to think about their trip preparation and to plan their trips well in advance , a change from normal daily routine may also be a contributing factor to fatigue related crashes because there are a high number of these crashes in the early hours of the morning at weekends 司机应该更多的考虑他们的行程,从中可以提前计划他们的形成安排,正常日程被打断可能是导致疲劳性事故的原因,因为很多车祸都是在周末清晨的时候发生的
The paper studies the testing principle for the dynamic characteristic of the pressure temperature switch , designs and complete the mechanical structure of the testing system independently , develops two sets testing systems ’ circuits and software based on pc and dsp , makes some experiments using the testing system based on pc . the paper analyzes and calculates the precision and repetition of the testing system through the mathematics model and repetitious measuring results . in the end , the paper analyzes the dynamic characteristic of the pressure temperature switch , and advances some steps to improve the dynamic characteristic 本论文研究了压力式温控器开关动态特性的测试原理;独立设计完成了测试系统的机械结构;研制了基于pc机和基于dsp两套测试系统的硬件电路和软件程序;使用基于pc机的测试系统进行试验,通过测试系统的数学模型分析计算了测试系统的测量精度,利用多次测量结果分析计算了测试系统的测量重复精度;通过疲劳性试验,定性分析了压力式温控器开关的动态特性,并给出改进其动态特性的措施。
With the development of space exploration projects , the atrophy and decreased function in antigravity skeletal muscles are one of major problems that need to be solved for the prolonged space flight . to understand the features of decreased contractile function and increased fatigability in unloaded hindlimb skeletal muscles will help to develop effective countermeasures during space flight , and contribute to the prevention and treatment of skeletal muscle atrophy in long - term bed - rest patients 随着载人航天活动的发展，航天飞行时间越来越长，抗重力肌废用性萎缩引起的强直收缩疲劳性增加，使航天员运动易疲劳的感觉更加明显，限制了飞行时间和工作效率，在应急逃生时肌肉发生损伤的可能性增大，且影响返回地面重力环境后的再适应能力。
The aviation materials , such as superalloys ( mainly cobalt - base alloys ) , titanium - base alloys , stainless steels , ceramics , highly abrasionproof nonmetals , have become excellent clinical materials because of their premium properties of light mass , high strength , fatigue resistance , heat resisting , high reliability and biocompatibility , have been widely applied in surgical implants 航空材料中的高温合金（主要是钴合金） 、钛合金、不锈钢、陶瓷、高耐磨非金属等材料以其轻质、高强、高抗疲劳性、高耐热、高可靠性，并且具有良好的生物相容性等优良性能，已成为临床中较为理想的植入材料，并被广泛应用于外科植入物方面。
Nylon is one of the best quality snthetic fibers the rubber in dustry use nowadays . the nylon canvas is woven by nylon fibers both in warp and in weft , it is the most widely used fabric in rubb - er industry , and its outstanding merits are its high abrasion resistance . high fensile strength and good fatigue resistance . connvyor belts with nylon canvas inside have the characteristics of thin belt body , high tensile strength , good shock resistance , good troughability , high adhesion between pli - es , splendid flexibility and long working life . nylon conveyor belts are suitable for medium , long - di - stance and heavy - load transportation of materials , widely used in mining , metallurgical industry and architectural industry , ports and etc 产品说明:尼龙是橡胶工业目前所用合成纤维中性能最好的品种之一，其结构经纬向均为锦纶纤维编织，用途最广的品种，它最突出的优点是耐磨性好，强度高，耐疲劳性好，尼龙帆布做成输送带具有带体薄，强力高，耐冲击，成槽性好，层间粘合力大，屈挠性优异及使用寿命长等特点，适用于中长距离，较高载量，高速条件下输送物料，广泛用于矿山，冶金、建筑、港口等部门。
Nylon is one of the best quality snthetic fibers the rubber in dustry use nowadays . the nylon canvas is woven by nylon fibers both in warp and in weft , it is the most widely used fabric in rubb - er industry , and its outstanding merits are its high abrasion resistance . high fensile strength and good fatigue resistance . connvyor belts with nylon canvas inside have the characteristics of thin belt body , high tensile strength , good shock resistance , good troughability , high adhesion between pli - es , splendid flexibility and long working life . nylon conveyor belts are suitable for medium , long - di - stance and heavy - load transportation of materials , widely used in mining , metallurgical industry and architectural industry , ports and etc 尼龙是橡胶工业目前所用合成纤维中性能最好的品种之一，其结构经纬向均为锦纶纤维编织，用途最广的品种，它最突出的优点是耐磨性好，强度高，耐疲劳性好，尼龙帆布做成输送带具有带体薄，强力高，耐冲击，成槽性好，层间粘合力大，屈挠性优异及使用寿命长等特点，适用于中长距离，较高载量，高速条件下输送物料，广泛用于矿山，冶金、建筑、港口等部门。
