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过去40年,中琉历史关系研究整理了许多的文献档案资料,这是研究工作深入推进的基础。学术的研究主要围绕中琉册封与进贡、航海与贸易、人员的移动和文化的交流展开论述。通过对现有研究存在的问题和不足的思考,进一步提出今后研究可以拓展的空间。 相似文献
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汽车被动安全性研究综述 总被引:8,自引:1,他引:8
本文对汽车被动安全性研究近40的的发展进行了全面系统的考察,在此基础上提出了在我国开展汽车被动安全性研究宜采用的方法。 相似文献
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Ella Graham-Rowe Stephen Skippon 《Transportation Research Part A: Policy and Practice》2011,45(5):401-418
Transport accounts for nearly a quarter of current energy-related carbon dioxide emissions with car travel constituting more than three quarters of all vehicle kilometres travelled. Interventions to change transport behaviour, and especially to reduce car use, could reduce CO2 emissions from road transport more quickly than technological measures. It is unclear, however, which interventions are effective in reducing car use and what the likely impact of these interventions would be on CO2 emissions. A two-stage systematic search was conducted focusing on reviews published since 2000 and primary intervention evaluations referenced therein. Sixty-nine reviews were considered and 47 primary evaluations found. These reported 77 intervention evaluations, including measures of car-use reduction. Evaluations of interventions varied widely in the methods they employed and the outcomes measures they reported. It was not possible to synthesise the findings using meta-analysis. Overall, the evidence base was found to be weak. Only 12 of the 77 evaluations were judged to be methodologically strong, and only half of these found that the intervention being evaluated reduced car use. A number of intervention approaches were identified as potentially effective but, given the small number of methodologically strong studies, it is difficult to draw robust conclusions from current evidence. More methodologically sound research is needed in this area. 相似文献
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ISM规则的强制实施,促使船舶的安全管理从原来的注重船舶硬件向管理软件转变,这对船长的管理素质提出了更高的要求。通过实施ISM规则对船长应具备的管理基本素质和技能的要求进行探讨,并提出提高船长管理素质的途径和方法的思考。 相似文献
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“9.11”后,国际海运界关注于恐怖活动对海运业构成巨大的潜在危险,并开始采取相应的措施来打击海上恐怖活动。通过对IMO打击海上暴力和犯罪的工作回顾,阐述了恐怖活动给航运业带来的危害,结合当前国际反恐形势,提出了加强我国海上反恐保安应对措施的建议。 相似文献
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通过对国际电工委员会制订的IEC61000系列标准总体构架和具体内容的描述,解读供电网络谐波影响及其指标要求的实质和内涵,并以此来对照国家标准和电气化铁道供电网络谐波的内在关联,找出相互之间存在的差异和问题,以期对相关国家标准、铁道行业标准的执行和制、修订提供有益的借鉴。 相似文献
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介绍了上海交通大学内燃机性能学组在高增压柴油机性能改进研究方面的成果,包括二次进气系统、扫气旁通系统、顾氏系统、自动变进排气供油正时系统和一式脉冲转换器涡轮增压系统。 相似文献
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