沥青稳定碎石基层混合料路用性能的研究

简要介绍了沥青稳定碎石在国内外的研究现状,探讨了沥青稳定碎石混合料的配合比设计,着重分析了ATB-30的高温稳定性、水稳定性与疲劳特性规律。     

Valuing casualty risk reductions from estimated baseline risk

Stated choice studies have been applied regularly to the valuation of time savings and other attributes of travelling as perceived by individuals. In such experiments, respondents often provide reference levels for the attributes and the hypothetical choices presented to them are pivoted around actual behaviour. However, most individuals are not able to provide reference levels for the number of casualties on the road they travel. Thus, if valuation of this important element is attempted, it is the researcher who must provide casualty risk reference levels to the respondents. Some studies have applied route choice experiments including a safety attribute but the majority has been limited to only one particular road section with a common baseline risk for all respondents.     

广河高速公路柔性基层ATB-25配合比设计及施工控制

结合广河高速公路广州段工程沥青路面柔性基层配合比设计及施工控制应用实践,重点阐述了柔性基层ATB-25配合比设计和施工要点及注意事项。     

基于经验模式分解和11/2维谱的客车轴承故障诊断

为了保证高速客车的行车安全,开展了25型客车轴承故障检测诊断方法研究,使用振动信号对客车车轴轴承进行早期诊断和预警.分析了客车轴承振动信号特征,针对轴承故障特征频率包含的能量少且受到噪声干扰的特点,将经验模式分解和11/2维谱引入轴承振动信号分析,提出了基于经验模式分解和11/2维谱提取故障特征频率的客车轴承诊断方法....     

STUDY ON THE THERAPEUTIC EFFECTS OF GINSENOSIDE Rg-1 AND GASTRODINE ON AD MODEL RATS INDUCED BY β-AMYLOID PEPTIDE (25-35)

Objective To study the therapeutic effects of Ginsenoside Rg-1 and Gastrodine on rats model of Alzheimer's disease(AD). Methods Aggregated β-Amyloid peptide (25-35) was injected into the lateral ventricle of rats to establish AD models. Ginsenoside Rg-1, Gastrodine and Ginsenoside Rg-1+Gastrodine were intraperitoneally injected into rats of each test group(Ginsenoside Rg-1∶10mg/kg·day; Gastrodine 100mg/kg·day) for 4 weeks, the rats of control group received equal volume of saline. Passive avoidance task and Morris maze test were done to assess the ability of learning and memory. The content of superoxide dismutase (SOD), malondiadehyde (MDA), total-antioxidative capability (T-AOC), Choline acetyltransferase (ChAT) and acetylcholinesterase (AchE) in brain tissue were measured. Results Ginsenoside Rg-1 and Gastrodine significantly improved learning and memory deficits in the rats with AD induced by β-Amyloid peptide (25-35) (P<0.05). Ginsenoside Rg-1+Gastrodine group were better than Ginsenoside Rg-1 group and Gastrodine group (P<0.05). Ginsenoside Rg-1 reduced the increase of SOD, MDA, but inhibited the decrease of T-AOC, AchE and ChAT; Gastrodine reduced the increase of SOD, MDA, while inhibited the decrease of T-AOC. Gastrodine could also prevent the activity of ChAT and AchE decline in AD rats. Conclusion Both Ginsenoside Rg-1 and Gastrodine have therapeutic effects on rats with AD; Ginsenoside Rg-1 and Gastrodine injection at the same time were better than only using one of them. Their mechanisms might different. Ginsenoside Rg-1 can not only inhibit peroxidation but also increase the activity of AchE and ChAT in brain tissue, while Gastrodine can inhibit peroxidation only, but it can't prevent the decline of ChAT and AchE activity in AD rats.     

Superpave25沥青混合料性能的试验研究

Superpave25沥青混合料具有高温抗车辙性能和水稳定性等良好的路用性能,是一种值得推广的新型沥青路面下面层级配.     

TMIS与PMIS网络互联的设计与实现

作者提出将全路TMIS和PMIS两大网络资源互联的构想及实现方案。文中详尽介绍了使用VLAN技术在局部实现这一构想的具体实施过程。     

浅议25Hz相敏轨道电路故障处理方法

近年来，25Hz相敏轨道电路故障已成为一个影响铁路运输效率的严重问题。通过对故障总结归类，系统地介绍了25Hz相敏轨道电路故障的处理方法。     

25Hz相敏轨道电路断轨（断线）监督检查方案的探讨

25Hz相敏轨道电路的断轨（断线）监督检查问题长期影响着铁路安全行车。针对25Hz相敏轨道电路的断轨（断线）监督检查问题进行分析、探讨,确定实现断轨（断线）监督检查的技术标准,并提出相应解决方案,实现断轨（断线）监督检查。     

ATB-25沥青砼压实质量的控制技术

结合济焦(济源-焦作)高速公路ATB-25沥青砼下面层的施工实例,从机械的选型与组合、碾压参数和碾压温度的确定等方面,阐述了在施工过程中控制路面压实质量的要点,说明了碾压方案、压实技术以及碾压注意事项.